1. An ISOFIX structure, comprising: a base sleeve (200) and a shell (100) extending along a first direction, wherein the base sleeve (200) is sleeved outside the shell (100) and can move along the first direction relative to the shell (100);

along a first direction, a plurality of gear holes (110) are formed in the outer wall of the shell (100) at intervals, an elastic locking pin assembly is arranged on the base sleeve (200), the elastic locking pin assembly comprises a gear pin (310) and an elastic resetting piece (320) connected with the gear pin (310), the gear pin (310) can be inserted into the gear holes (110), and the elastic resetting piece (320) is used for enabling the gear pin (310) to have a tendency of moving into the gear holes (110);

a release structure (400) is arranged in the shell (100), and the release structure (400) is used for pushing the gear pin (310) to the outer side of the shell (100).

2. The ISOFIX structure according to claim 1, wherein the side walls of the top end of the shift pin (310) have a first guide slope (311) and a second guide slope (312) facing the bayonet end (120) and the tail end (130) of the housing (100), respectively, and in the direction of the bayonet end (120) of the housing (100) toward the tail end (130), the first guide slope (311) is inclined toward the inside of the housing (100), and the second guide slope (312) is inclined toward the outside of the housing (100);

one surface of the unlocking structure (400) facing the gear hole (110) is provided with a plurality of concave-convex structures which correspond to the gear hole (110) one by one; the concave-convex structure comprises a bulge (410) and a recess (420) which are arranged in sequence along the direction from the bayonet end (120) to the tail end (130) of the shell (100);

the release structure (400) is movable in a first direction relative to the housing (100) to align the protrusion (410) or recess (420) with the corresponding gear hole (110); when the protrusion (410) is aligned with the gear hole (110) and the top end of the gear pin (310) abuts against the top surface of the protrusion (410), the outer edge (3111) of the first guide inclined surface and the outer edge (3121) of the second guide inclined surface are both located outside the gear hole (110) in the inward and outward direction of the gear hole (110).

3. The ISOFIX structure according to claim 2, wherein a face of the protrusion (410) facing the rear end (130) of the housing (100) has a third guiding inclined surface (411) inclined in the same direction as the first guiding inclined surface (311), and when the release lock structure (400) moves in the direction of the rear end (130) of the housing (100), the third guiding inclined surface (411) is configured to slidingly contact the first guiding inclined surface (311) and push the shift pin (310) to the outside of the shift hole (110) to the tip end face of the protrusion (410).

4. The ISOFIX structure according to claim 2, wherein when the recess (420) on the release structure (400) is aligned with the shift hole (110) and the tip of the shift pin (310) abuts on the bottom surface of the recess (420), the outer edge (3111) of the first guiding slope is located outside the shift hole (110) and the outer edge (3121) of the second guiding slope is located inside the shift hole (110) in the inward and outward directions of the shift hole (110).

5. The ISOFIX structure according to claim 4, further comprising a latch (510), a rotating shaft (520), and an elastic pulling member (530), wherein the latch (510) is rotatably connected to the housing (100) via the rotating shaft (520), one end of the elastic pulling member (530) is connected to the latch (510), and the other end is connected to the release mechanism (400), and the elastic pulling member (530) is used to pull the latch (510) and the release mechanism (400) toward each other, so that the elastic pulling member (530) can pull the latch (510) to rotate.

6. The ISOFIX structure of claim 5, wherein the depth of the recess of the relief closest to the trailing end (130) of the housing (100) is deeper than the depth of the recesses of the other reliefs;

when the recess is aligned with the gear hole (110) and the top of the gear pin (310) abuts against the bottom surface of the recess of the concave-convex structure closest to the tail end (130) of the housing (100), the outer edge (3111) of the first guide inclined surface and the outer edge (3121) of the second guide inclined surface are both located inside the gear hole (110) along the inside-outside direction of the gear hole (110).

7. The ISOFIX structure of claim 6, characterized in that said latch (510) is provided with a first abutting portion (512) and a second abutting portion (513) arranged along its circumferential direction, said first abutting portion (512) being adapted to abut against said release lock structure (400) when said latch (510) is in the open state and to position said release lock structure (400) at a first position with respect to said housing (100), said shift hole (110) being aligned with said recess (420) when said release lock structure (400) is in the first position; the second abutting part (513) is used for abutting against the release structure (400) when the latch (510) is in a meshing state, and enabling the release structure (400) to be at a second position relative to the shell (100), when the release structure (400) is at the second position, the gear hole (110) is aligned with the recess (420), and the release structure (400) at the second position is closer to the bayonet end (120) of the shell (100) than the release structure (400) at the first position;

a lifting boss (430) is arranged in a recess (420) of the concave-convex structure closest to the tail end (130) of the shell (100), a gap for accommodating a gear pin (310) is formed between the lifting boss (430) and a protrusion (410) of the concave-convex structure closest to the tail end (130) of the shell (100) along the direction from the bayonet end (120) of the shell (100) to the tail end (130), and a fourth guide inclined plane is arranged on one surface of the lifting boss (430) facing the bayonet end (120) of the shell (100);

when the latch (510) is changed from the open state to the engagement state, the fourth guide inclined surface is used for being in sliding contact with the second guide inclined surface (312) of the gear pin (310) and pushing the gear pin (310) to move towards the outer side of the gear hole (110) to the top surface of the lifting boss (430); when the top end of the gear pin (310) abuts against the top surface of the lifting boss (430), the outer edge (3111) of the first guide inclined surface is located on the outer side of the gear hole (110), and the outer edge (3121) of the second guide inclined surface is located on the inner side of the gear hole (110).

8. The ISOFIX structure of claim 7, wherein the first abutting portion (512) and the second abutting portion (513) are stepped structures, and when the latch (510) is in the engaged state, one end of the release structure (400) close to the bayonet end (120) is clamped in the stepped structures, and the first abutting portion (512) is used for preventing the latch (510) from rotating relative to the housing (100).

9. The ISOFIX structure according to claim 1, wherein the elastic locking pin assembly comprises a guide sleeve (610), a through hole communicating the inside and the outside is formed on the wall of the base sleeve (200), the guide sleeve (610) is connected to the outer wall of the base sleeve (200) and the opening of the guide sleeve (610) is aligned with the through hole;

the gear pin (310) is connected in the guide sleeve (610) in a sliding mode, and the elastic resetting piece is located between the bottom of the guide sleeve (610) and the bottom of the gear pin (310).

10. A child safety seat comprising an ISOFIX structure according to any of claims 1 to 9.

Background

ISOFIX refers to a system in which a child restraint system is connected to a vehicle. It includes two rigid connection points on the vehicle, two corresponding rigid connection devices on the child restraint system, and an anti-roll method (e.g. top restraint anti-roll, support leg anti-roll). It is a new standard for the placement of child seats in automobiles. This standard is being accepted by a number of automotive manufacturers.

The prior art ISOFIX assembly structure for a child safety seat comprises a housing and a sleeve, wherein the sleeve is sleeved outside the housing and can move along the length direction of the housing. The sleeve is provided with a plurality of gear holes arranged at intervals along the length direction; the shell is internally provided with a latch connected with an automobile anchor point, an unlocking assembly for driving the latch to move and a gear assembly for being clamped with a gear hole.

In the prior art, too many parts are arranged in the shell, so that on one hand, the volume of the shell is increased, the volume of a sleeve which is connected to the outer side of the shell in a sliding manner is also increased, and the arrangement of a seat is influenced; on the other hand, in order to reduce the volume of the housing, the arrangement of many parts in the housing is compact, and when the vehicle body vibrates, the adjacent parts can generate mutual interference collision, thereby causing the problem of part damage.

Disclosure of Invention

The invention aims to provide an ISOFIX structure and a child safety seat, which are used for relieving the technical problems that the conventional ISOFIX structure is large in size and easy to damage.

In a first aspect, an ISOFIX structure provided in an embodiment of the present invention includes: the base sleeve is sleeved outside the shell and can move along the first direction relative to the shell;

along a first direction, a plurality of gear holes arranged at intervals are formed in the outer wall of the shell, an elastic lock pin assembly is arranged on the base sleeve and comprises a gear pin and an elastic reset piece connected with the gear pin, the gear pin can be inserted into the gear holes, and the elastic reset piece is used for enabling the gear pin to have a tendency of moving into the gear holes;

a lock releasing structure is arranged in the shell and used for pushing the gear pin to the outer side of the shell.

Furthermore, the side wall of the top end of the gear pin is respectively provided with a first guide inclined plane and a second guide inclined plane which face the clamping mouth end and the tail end of the shell, and along the direction that the clamping mouth end of the shell faces the tail end, the first guide inclined plane inclines towards the inside of the shell, and the second guide inclined plane inclines towards the outside of the shell;

one surface of the unlocking structure facing the gear holes is provided with a plurality of concave-convex structures which correspond to the gear holes one by one; the concave-convex structure comprises a bulge and a recess which are sequentially arranged along the direction from the mouth clamping end to the tail end of the shell;

the unlocking structure can move along a first direction relative to the shell to align the protrusion or the recess with the corresponding gear position hole; when the protrusion is aligned with the gear hole and the top end of the gear pin is abutted to the top surface of the protrusion, the outer edge of the first guide inclined plane and the outer edge of the second guide inclined plane are both located on the outer side of the gear hole along the inner and outer directions of the gear hole.

Furthermore, one surface of the protrusion facing the tail end of the shell is provided with a third guide inclined surface which has the same inclination direction as the first guide inclined surface, and when the unlocking structure moves towards the tail end of the shell, the third guide inclined surface is used for being in sliding contact with the first guide inclined surface and pushing the gear pin to the outer side of the gear hole to the end surface of the top end of the protrusion.

Further, when the recess on the lock release structure is aligned with the gear hole and the top end of the gear pin abuts against the bottom surface of the recess, the outer edge of the first guide inclined plane is located on the outer side of the gear hole and the outer edge of the second guide inclined plane is located on the inner side of the gear hole along the inner and outer directions of the gear hole.

Furthermore, a first abutting part and a second abutting part which are arranged along the circumferential direction of the latch are arranged on the latch, the first abutting part is used for abutting against the unlocking structure when the latch is in an open state, the unlocking structure is located at a first position relative to the shell, and the gear hole is aligned with the recess when the unlocking structure is located at the first position; the second abutting part is used for abutting against the unlocking structure when the latch is in an occlusion state, and enabling the unlocking structure to be at a second position relative to the shell, when the unlocking structure is at the second position, the gear hole is aligned with the recess, and the unlocking structure at the second position is closer to the bayonet end of the shell than the unlocking structure at the first position;

a lifting boss is arranged in a recess of the concave-convex structure closest to the tail end of the shell, a gap for accommodating a gear pin is formed between the protrusion of the concave-convex structure closest to the tail end of the shell and the lifting boss along the direction of the clamping mouth end of the shell towards the tail end, and a fourth guide inclined plane is arranged on one surface of the lifting boss facing the clamping mouth end of the shell;

when the latch is changed from the open state to the occlusion state, the fourth guide inclined surface is used for being in sliding contact with the second guide inclined surface of the gear pin and pushing the gear pin to move to the outer side of the gear hole to the top surface of the lifting boss; when the top end of the gear pin abuts against the top surface of the lifting boss, the outer edge of the first guide inclined plane is located on the outer side of the gear hole, and the outer edge of the second guide inclined plane is located on the inner side of the gear hole.

Furthermore, the first abutting portion and the second abutting portion are of a ladder structure, when the latch is in an engaged state, one end, close to the bayonet end, of the unlocking structure is clamped in the ladder structure, and the first abutting portion is used for preventing the latch from rotating relative to the shell.

Furthermore, the elastic lock pin assembly comprises a guide sleeve, a through hole for communicating the inside and the outside is formed in the pipe wall of the base sleeve, the guide sleeve is connected to the outer wall of the base sleeve, and an opening of the guide sleeve is aligned with the through hole;

the gear pin is connected in the guide sleeve in a sliding mode, and the elastic reset piece is located between the bottom of the guide sleeve and the bottom of the gear pin.

In a second aspect, embodiments of the present invention provide a child safety seat, including the above ISOFIX structure.

The ISOFIX structure provided by the embodiment of the invention is characterized in that a release structure is arranged in the shell and used for pushing the gear pin to the outer side of the shell. The base sleeve is slid on the shell, so that the gear pin on the base sleeve can be inserted into the gear hole, adjustment of different gears is realized, and unlocking operation of the unlocking gear pin is realized through the lock releasing structure. The ISOFIX structure that this embodiment provides is different from prior art, its elastic lock pin assembly no longer sets up in the body, but set up on the base sleeve, after the quantity of the inner part of body is reduced, can make the whole volume of the body reduce, and then make the volume of ISOFIX structure reduce, meet more assembly requirements; and with elasticity lockpin subassembly follow casing removal back, the part quantity in the casing reduces, more makes things convenient for the arrangement of other parts in the casing, reduces the risk that the part produces interference each other.

The child safety seat provided by the embodiment of the invention comprises the ISOFIX structure. Because the above ISOFIX structure is applied to the child safety seat provided by the embodiment of the invention, the child safety seat provided by the embodiment of the invention also has the advantages of the ISOFIX structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of an ISOFIX structure provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of an ISOFIX structure provided in an embodiment of the present invention with the base sleeve removed;

FIG. 3 is a schematic view of the interior of a housing of an ISOFIX structure provided by an embodiment of the present invention;

fig. 4 is an exploded view of an ISOFIX structure provided by an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a base sleeve of an ISOFIX structure provided in an embodiment of the present invention;

fig. 6 is a schematic diagram of an internal structure of an ISOFIX structure in a top view direction in an initial state according to an embodiment of the present invention;

FIG. 7 is a schematic view of the internal structure in the front view of the state of FIG. 6;

FIG. 8 is an enlarged view of a portion of FIG. 6 at position A;

fig. 9 is a schematic view of an internal structure in a top view direction of the ISOFIX structure provided in the embodiment of the present invention after the latch is in an open state and the release structure is pulled;

FIG. 10 is a schematic view of the internal structure in the front view in the state of FIG. 9;

FIG. 11 is an enlarged view of a portion of FIG. 9 at position B;

fig. 12 is a schematic view of an internal structure of a recess of an ISOFIX structure, in which a latch of the ISOFIX structure is in an open state and a shift pin is located at the rearmost side, in a top view direction;

FIG. 13 is a schematic view of the internal structure in the front view in the state of FIG. 12;

FIG. 14 is an enlarged view of a portion of FIG. 12 at position C;

fig. 15 is a schematic view of an internal structure of an ISOFIX structure in a top view when a latch of the ISOFIX structure is in a meshed state according to an embodiment of the present invention;

FIG. 16 is a schematic view showing the internal structure in the front view in the state of FIG. 15;

FIG. 17 is an enlarged view of a portion of FIG. 15 at position D;

FIG. 18 is a schematic diagram of the internal structure of the ISOFIX structure in a top view with the latch engaged and the base sleeve moved according to an embodiment of the present invention;

FIG. 19 is a schematic view showing the internal structure in the front view in the state of FIG. 18;

FIG. 20 is an enlarged view of a portion of FIG. 18 at position E;

fig. 21 is a schematic diagram of an internal structure of an ISOFIX structure when a latch is unlocked according to an embodiment of the present invention;

FIG. 22 is a schematic view showing the internal structure in the front view in the state of FIG. 21;

fig. 23 is a partial enlarged view of the position F in fig. 21.

Icon: 100-a housing; 110-gear hole; 120-a bayonet end; 130-tail end; 140-a limit post; 150-left shell; 160-right shell; 200-a base sleeve; 310-shift pin; 311-a first guiding ramp; 3111-outer edge of first guide ramp; 312-a second guide ramp; 3121-the outer edge of the second guide ramp; 320-an elastic reset piece; 400-a lock release structure; 410-a bump; 411-third guide slope; 420-dishing; 430-lifting the boss; 440-a handle; 510-latch; 511-a bite; 512-a first abutment; 513 — a second abutment; 520-a rotating shaft; 530-elastic traction element; 610-a guide sleeve; 620-collar; 700-car anchor point.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-23, embodiments of the present invention provide an ISOFIX structure that can be mounted to the bottom of a child-mounted seat, and two ISOFIX structures are typically provided on the bottom of one child-mounted seat.

As shown in fig. 1-5, the ISOFIX structure includes: the base sleeve 200 and the housing 100, the housing 100 is in a strip shape, and the length direction of the housing 100 is referred to as a first direction in this embodiment. The base sleeve 200 is sleeved outside the housing 100 and can move in a first direction relative to the housing 100. Along the first direction, a plurality of gear holes 110 are arranged on an outer wall of one side of the housing 100 at intervals, in this embodiment, the number of the gear holes 110 is 9, and the cross section of each gear hole 110 may be rectangular. As shown in fig. 5, an elastic locking pin assembly is disposed on the base sleeve 200, the elastic locking pin assembly includes a shift position pin 310 and an elastic reset member 320 connected to the shift position pin 310, an active direction of the shift position pin 310 is parallel to a depth direction of the shift position hole 110, when the base sleeve 200 is slid along a first direction, the shift position pin 310 can extend into the shift position hole 110 under the action of the elastic reset member 320 when the shift position pin 310 is aligned with the shift position hole 110, and specifically, the elastic reset member 320 may be a spring. The housing 100 is provided with a release structure 400, the release structure 400 is driven manually or electrically, and the release structure 400 can push the shift pin 310 to the outside of the housing 100, so that the shift pin 310 can leave the shift hole 110.

The release structure 400 is used to push the gearshift pin 310 to the outside of the housing 100. The base sleeve 200 is slid on the housing 100, so that the gear pin 310 on the base sleeve 200 can be inserted into the gear hole 110 to adjust different gears, and the unlocking operation of the unlocking gear pin 310 is realized through the unlocking structure 400. The ISOFIX structure provided by this embodiment is different from the prior art, the elastic locking pin assembly is not arranged in the housing 100, but arranged on the base sleeve 200, and after the number of components in the housing 100 is reduced, the overall volume of the housing 100 can be reduced, so that the volume of the ISOFIX structure is reduced, and more assembly requirements are met; and after the elastic locking pin assembly is removed from the shell 100, the number of parts in the shell 100 is reduced, the arrangement of other parts in the shell 100 is more convenient, and the risk of interference among the parts is reduced.

As shown in fig. 6 to 8, the side walls of the top end of the shift pin 310 respectively have a first guide slope 311 and a second guide slope 312 facing the mouth end 120 and the tail end 130 of the housing 100, and in the direction that the mouth end 120 of the housing 100 faces the tail end 130, the first guide slope 311 is inclined toward the inside of the housing 100, and the second guide slope 312 is inclined toward the outside of the housing 100; a plurality of concave-convex structures corresponding to the gear holes 110 one by one are arranged on one surface of the unlocking structure 400 facing the gear holes 110; in the direction from the bayonet end 120 to the tail end 130 of the housing 100, the concavo-convex structure includes a protrusion 410 and a recess 420 arranged in sequence; the release structure 400 is movable in a first direction with respect to the housing 100 to align the protrusion 410 or the recess 420 with the corresponding shift hole 110; as shown in fig. 9 to 11, when the protrusion 410 is aligned with the shift position hole 110 and the tip of the shift position pin 310 abuts on the top surface of the protrusion 410, the outer edge 3111 of the first guide slope and the outer edge 3121 of the second guide slope are located outside the shift position hole 110 in the inward and outward directions of the shift position hole 110.

The tip of the shift pin 310 is one end abutting against the lock release structure 400. For convenience of description, in the present embodiment, the side of the housing 100 facing the bayonet end 120 is the front side, and the side of the housing 100 facing the tail end 130 is the rear side. The first guiding inclined plane 311 and the second guiding inclined plane 312 face the front side and the rear side respectively, the first guiding inclined plane 311 and the second guiding inclined plane 312 are V-shaped, or the extending surface of the first guiding inclined plane 311 and the extending surface of the second guiding inclined plane 312 are V-shaped, wherein, along the inner and outer directions of the housing 100, the first guiding inclined plane 311 and the second guiding inclined plane 312 both include an inner edge close to the inner side of the housing 100 and an outer edge far away from the housing 100. The inner edge of the first guide slope 311 and the inner edge of the second guide slope 312 are at the same height position, and the outer edge 3111 of the first guide slope is higher than the outer edge 3121 of the second guide slope. The plurality of asperities may form a continuous alternating arrangement of protrusions 410 and depressions 420, with the initial configuration of the asperities being protrusions 410 in a direction from the mouth end 120 toward the tail end 130. As shown in fig. 7 and 8, in the initial state, the recess 420 of the unlocking structure 400 is aligned with the shift position hole 110, the shift position pin 310 extends into the recess 420, and the protrusion 410 of the unlocking structure 400 is aligned with the shift position hole 110 by pulling the unlocking structure 400 toward the rear side along the first direction, at this time, the protrusion 410 at the front side of the shift position pin 310 can push the shift position pin 310 outward through the first guiding inclined surface 311, and the tip of the shift position pin 310 is always abutted against the unlocking structure 400 and finally moves to the tip end surface of the protrusion 410. The lengths and positions of the first guide inclined surface 311 and the second guide inclined surface 312, and the height of the protrusion 410 are reasonably designed, when the top end of the shift pin 310 abuts against the top surface of the protrusion 410, the outer edge 3111 of the first guide inclined surface and the outer edge 3121 of the second guide inclined surface are both located outside the shift hole 110, that is, the base sleeve 200 is pushed forward and backward, and the shift pin 310 can move up and down under the action of the first guide inclined surface 311 and the second guide inclined surface 312, so as to be completely released from the shift hole 110, thereby unlocking the shift pin 310. And because each of the shift holes 110 is aligned by a corresponding protrusion 410, the base sleeve 200 can freely slide back and forth in the first direction.

Further, a third guiding inclined surface 411 having the same inclined direction as the first guiding inclined surface 311 is disposed on a surface of the protrusion 410 facing the rear end 130 of the housing 100, and when the lock releasing structure 400 moves towards the direction of the rear end 130 of the housing 100, the third guiding inclined surface 411 is configured to slidably contact with the first guiding inclined surface 311 and push the gear pin 310 to an end surface of a top end of the protrusion 410 outside the gear hole 110. The surface of the protrusion 410 toward the rear side may be a third guide slope 411, and the third guide slope 411 is parallel to the first guide slope 311. When the third guide slope 411 contacts the first guide slope 311 of the shift position pin 310, they can be in sliding contact with each other and more smoothly push the shift position pin 310 outward.

As shown in fig. 8, the lengths and positions of the first and second guide slopes 311 and 312, and the depth of the recess 420 are properly designed, when the recess 420 of the release structure 400 is aligned with the shift position hole 110 and the top end of the shift position pin 310 abuts against the bottom surface of the recess 420, along the inner and outer directions of the shift position hole 110, the outer edge 3111 of the first guide slope is located at an outer side of the gear hole 110, and the outer edges 3121 of the second guide slope are located at an inner side of the gear hole 110, and thus, when the shift pin 310 is positioned in the shift hole 110 and the recess 420, by pushing the base sleeve 200 forward, the first guiding inclined surface 311 can abut against the opening edge of the gear hole 110, and the gear pin 310 can move outwards under the action of the first guiding inclined surface 311, thereby completely disengaging the shift position pin 310 from the shift position hole 110 and enabling the base sleeve 200 to move forward. And because the outer edge 3121 of the second guide inclined plane is located the inside of the gear hole 110, and the cylindrical side wall of the gear pin 310 abuts against the gear hole 110, it is impossible to realize that the base sleeve 200 moves to the rear side, that is, the seat body on the base sleeve 200 can move along with the direction of the base sleeve 200 to the car seat back, and cannot move in the direction, so that unidirectional locking can be realized. Because the limiting function of car seat back, the user can be under gear round pin 310 locking state, promotes the children's seat body to car seat back one side as far as, and more convenience of customers adjusts children's safety seat's position.

As shown in fig. 7, the ISOFIX structure further includes a latch 510, a rotating shaft 520, and an elastic pulling member 530, the latch 510, the rotating shaft 520, and the elastic pulling member 530 are all located at the bayonet end 120 of the housing 100, the latch 510 is rotatably connected to the housing 100 through the rotating shaft 520, one end of the elastic pulling member 530 is connected to the latch 510, and the other end is connected to the release mechanism 400, the elastic pulling member 530 may be a tension spring, and the elastic pulling member 530 is configured to pull the latch 510 and the release mechanism 400 toward each other, so that the elastic pulling member 530 can pull the latch 510 to rotate. As shown in fig. 9-11, when the user pulls the unlocking structure 400 to move towards the rear side, the latch 510 can be driven by the elastic pulling member 530 to rotate clockwise, so as to complete the unlocking action of the latch 510. In the initial state, the engaging portion 511 of the latch 510 is in an open state, the release mechanism 400 abuts against the latch 510 under the traction of the elastic traction member 530, and at this time, the recess 420 of the release mechanism 400 is aligned with the shift hole 110, and when the release mechanism 400 is pulled backward, because the latch 510 is already in the open state, and the latch 510 cannot continue to rotate clockwise due to the structural restriction of the housing 100. After the gear pin 310 is unlocked, the latch 510 is in a state of being engaged with the car anchor 700.

As shown in fig. 12-14, the depth of the recess of the concave-convex structure closest to the tail end 130 of the housing 100 is deeper than the depth of the recesses of the other concave-convex structures; when the recess is aligned with the gear hole 110 and the top of the gear pin 310 abuts against the bottom of the recess of the concave-convex structure closest to the rear end 130 of the housing 100, the outer edge 3111 of the first guide slope and the outer edge 3121 of the second guide slope are both located inside the gear hole 110 in the inward and outward directions of the gear hole 110.

In this embodiment, the number of the recesses 420 is the same as the number of the shift holes 110, and may be 9. The depth of the recess 420 in the rearmost concavo-convex structure is deeper than the recesses 420 of the other concavo-convex structures. By designing the lengths and positions of the first guide slope 311 and the second guide slope 312 and the depth of the recess 420 in the rearmost concave-convex structure, when the top of the shift position pin 310 abuts against the bottom surface of the recess of the rearmost concave-convex structure, as shown in fig. 14, both the outer edge 3111 of the first guide slope and the outer edge 3121 of the second guide slope are located inside the shift position hole 110, the cylindrical sidewall of the shift position pin 310 abuts against the sidewall of the shift position hole 110, and the base sleeve 200 cannot slide freely through the first guide slope 311 and the second guide slope 312, and is limited in the front and rear directions. The release structure 400 is pulled to enable the gear pin 310 to be in an unlocked state, the base sleeve 200 is pulled to the gear hole 110 on the rearmost side, the release structure 400 is released, the release assembly moves forward under the action of the elastic traction piece 530 and abuts against the latch 510 in an opened state, the recess 420 corresponds to the gear hole 110, the gear pin 310 can be completely limited to the gear hole 110 on the rearmost side, the base sleeve 200 and the shell 100 are relatively fixed, namely the child safety seat body and the shell 100 are relatively fixed, and a user can conveniently connect the latch 510 on the shell 100 with the automobile anchor point 700.

As shown in fig. 3, 12, 13, 15-17, the latch 510 is provided with a first abutting portion 512 and a second abutting portion 513 arranged along the circumferential direction, the first abutting portion 512 is outwardly convex, and the second abutting portion 513 is inwardly concave, which may form a step structure. As shown in fig. 12, when the latch 510 is in the open state, the first abutting portion 512 abuts against the release mechanism 400 under the action of the elastic pulling member 530, and the release mechanism 400 is located at a first position relative to the housing 100, and when the release mechanism 400 is located at the first position, the gear hole 110 is aligned with the recess 420, and the gear pin 310 can be inserted into the recess 420. As shown in fig. 15, when the latch 510 rotates counterclockwise under the pushing of the anchor point 700, the latch 510 is in the engaged state, the second abutting portion 513 abuts against the release mechanism 400, so that the release mechanism 400 is located at the second position relative to the housing 100, and when the release mechanism 400 is located at the second position, the gear hole 110 is aligned with the recess 420. Because the second abutting portion 513 is a concave structure, the release mechanism 400 moves a small distance to the front side when the latch 510 is shifted from the open state to the engaged state, i.e., the release mechanism 400 located at the second position is closer to the bayonet end 120 of the housing 100 than the release mechanism 400 located at the first position.

As shown in fig. 17, a lifting boss 430 is disposed in the recess 420 of the concave-convex structure closest to the tail end 130 of the housing 100, a gap for accommodating the position-stopping pin 310 is formed between the lifting boss 430 and the protrusion 410 of the concave-convex structure closest to the tail end 130 of the housing 100 along the direction from the bayonet end 120 of the housing 100 toward the tail end 130, and a distance between the protrusion 410 and the lifting boss 430 at least can accommodate the position-stopping pin 310.

When the latch 510 is changed from the open state to the engaging state, the fourth guiding inclined surface is configured to be in sliding contact with the second guiding inclined surface 312 of the position pin 310 and push the position pin 310 to move to the top surface of the lifting boss 430 toward the outside of the position hole 110, when the top end of the position pin 310 abuts against the top surface of the lifting boss 430, the outer edge 3111 of the first guiding inclined surface is located at the outside of the position hole 110, and the outer edges 3121 of the second guiding inclined surface are located at the inside of the position hole 110, so that the base sleeve 200 can move to the front side but cannot move to the rear side. In the initial state, the release structure 400 abuts against the first abutting portion 512 of the latch 510, the recess 420 is aligned with the gear opening, the housing 100 is pushed forward, the engaging portion 511 of the latch 510 rotates counterclockwise and then engages with the anchor point 700 of the vehicle, after the position of the latch 510 is changed, the first abutting portion 512 does not abut against the front end of the release structure 400, the release structure 400 abuts against the second abutting portion 513, and in the whole process, the release structure 400 moves forward by a distance, so that the lifting boss 430 lifts the gear pin 310.

As shown in fig. 16, the first abutting portion 512 and the second abutting portion 513 are stepped structures, when the latch 510 is in the engaged state, the first abutting portion 512 is closer to the tail end 130 of the housing 100 than the second abutting portion 513, when the latch 510 is in the engaged state, one end of the release lock structure 400 close to the bayonet end 120 is clamped in the stepped structure, and the first abutting portion 512 is configured to prevent the latch 510 from rotating relative to the housing 100, that is, before the release lock structure 400 does not slip out from the stepped structure, the latch 510 cannot rotate.

As shown in fig. 5, the elastic locking pin assembly includes a guide sleeve 610, a through hole communicating the inside and the outside is provided on the tube wall of the base sleeve 200, the guide sleeve 610 is connected to the outer wall of the base sleeve 200, and the opening of the guide sleeve 610 is aligned with the through hole; the shift position pin 310 is slidably connected in the guide sleeve 610, and the elastic reset member is located between the bottom of the guide sleeve 610 and the bottom of the shift position pin 310.

The lantern ring 620 is inserted into both ends of the base sleeve 200, the lantern ring 620 comprises a pipe body with the outer diameter identical to the inner diameter of the base sleeve 200, a limiting edge protruding outwards along the circumferential direction is arranged at the outer end of the pipe body, the limiting edge abuts against the opening of the base sleeve 200 when the inner end of the pipe body is inserted into the base sleeve 200, and the inner wall of the lantern ring 620 is in direct contact with the shell 100.

As shown in fig. 1, the release mechanism 400 has a pull handle 440, and the housing 100 has a pull hole for avoiding the pull handle 440, so that the release mechanism 400 can be moved away from the latch 510 by pulling the pull handle 440.

As shown in fig. 3, a limiting post 140 is disposed in the housing 100, a strip-shaped limiting hole is disposed on the unlocking structure 400, the length direction of the strip-shaped limiting hole is the front-back direction of the housing 100, and the limiting post 140 is located in the limiting hole, so that the unlocking structure 400 can move stably back and forth relative to the housing 100.

The housing 100 may be formed by combining a left housing 150 and a right housing 160, wherein the gear hole 110 may be located on the left housing 150.

The ISOFIX structure uses the following principle:

1. as shown in fig. 6-8, in the initial state, the latch 510 is in the open state, and under the action of the elastic pulling member 530, the first abutting portion 512 of the latch 510 abuts against the release structure 400, the recess 420 on the release structure 400 is aligned with the shift position hole 110, and the shift position pin 310 on the base sleeve 200 is located in the shift position hole 110 on the foremost side.

2. As shown in fig. 9-11, the release structure 400 is pulled back and the protrusions 410 on the release structure 400 lift the shift pin 310. At this time, the outer edge 3121 of the second guiding inclined surface of the shift position pin 310 is higher than the opening edge of the shift position hole 110, and the rear side edge of the shift position hole 110 pushes the second guiding inclined surface 312 of the shift position pin 310 to move upward, so that the shift position pin 310 can be pushed out of the shift position hole 110.

3. As shown in fig. 12-14, the base sleeve 200 can be pulled to the rearmost end of the housing 100, and the release mechanism 400 is released, the release mechanism 400 is in the first position, the recess 420 is aligned with the gear hole 110, and the straight surfaces on both sides of the gear pin 310 are located in the recess 420 below the rearmost gear hole 110, and are not able to move forward and backward, and are limited forward and backward, so as to avoid the base sleeve 200 from shaking when the ISOFIX structure is connected to the vehicle anchor 700.

4. As shown in fig. 15-17, when the latch 510 is latched to the vehicle anchor 700, after the latch 510 rotates, the first abutting structure on the latch 510 no longer abuts against the release structure 400, and the release structure 400 moves forward under the pulling of the elastic pulling member 530 to abut against the second abutting part 513 of the latch 510. Meanwhile, the lifting step at the rear end of the unlocking structure 400 jacks up the gear pin 310, at this time, the outer edge 3111 of the first guide inclined plane of the gear pin 310 is higher than the front edge of the opening of the gear hole 110, the rear side straight surface of the gear pin 310 is located below the rear edge of the opening of the gear hole, and at this time, the base sleeve 200 can move forwards and cannot move backwards, so that unidirectional locking is realized.

5. As shown in fig. 18-20, with latch 510 in the engaged position, base sleeve 200 may be slid on housing 100 in a first direction and base sleeve 200 may be moved to a first gear closest to the back of the car seat to complete the installation of the child safety seat.

6. As shown in fig. 21-23, the lock structure 400 is released to the rear side, and the third guiding inclined plane 411 of the lock structure 400 pushes the shift pin 310 open, so as to unlock the shift pin 310; the release mechanism 400 is separated from the stepped structure of the latch 510, and the latch 510 is rotated clockwise into the open state by the elastic pulling member 530.

The child safety seat provided by the embodiment of the invention comprises the ISOFIX structure. Because the above ISOFIX structure is applied to the child safety seat provided by the embodiment of the invention, the child safety seat provided by the embodiment of the invention also has the advantages of the ISOFIX structure.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.