1. A stroller, characterized in that the stroller comprises:

the supporting assembly comprises a first bracket, a second bracket pivoted to the first bracket and a plurality of wheel mechanisms respectively arranged on the first bracket and the second bracket;

the push rod assembly comprises a first push rod, a second push rod pivoted to the first push rod and a third push rod pivoted to the second push rod, and the third push rod is pivoted to the second support;

the connecting rod assembly is respectively pivoted to the first bracket and the second bracket;

a seat assembly comprising a seat post and a seat connecting rod connected to the seat post, the seat connecting rod being pivotally connected to the link assembly and the third push rod, respectively;

the armrest component is respectively pivoted with the push rod component and the seat component;

the first locking component is connected with the first push rod and the second push rod and has a locking state for preventing the first push rod from rotating relative to the second push rod and an unlocking state for allowing the first push rod to rotate relative to the second push rod;

the second lock catch assembly is used for locking the armrest assembly and the push rod assembly and has a locking state for preventing the armrest assembly from rotating relative to the push rod assembly and an unlocking state for allowing the armrest assembly to rotate relative to the push rod assembly;

and the unlocking piece is used for driving the first locking assembly to be switched from the locking state to the unlocking state and driving the second locking assembly to be switched from the locking state to the unlocking state.

2. The stroller of claim 1, wherein the linkage assembly comprises a first link pivotally coupled to the first frame, a second link pivotally coupled to the second frame, a third link pivotally coupled to the first link and the second link, a flip member pivotally coupled to the second frame, the first link, the third link, and the seat link, and a fourth link pivotally coupled to the flip member, the second link, and the second frame;

the first connecting rod, the third connecting rod and the overturning piece are pivoted through the same rotating shaft, the second support, the fourth connecting rod and the overturning piece are pivoted through the same rotating shaft, and the overturning piece overturns when the stroller is folded.

3. The stroller of claim 1, wherein the linkage assembly comprises a first link pivotally coupled to the first bracket, a second link pivotally coupled to the second bracket, and a flipping mechanism pivotally coupled to the first link, the second bracket, and a seat link, the flipping mechanism flipping when the stroller is folded.

4. The stroller of claim 2, wherein the flip member is triangular in shape, and the first, fourth and seat connecting bars are pivotally connected to three corners of the triangle, respectively.

5. The stroller of claim 1, wherein the second bracket comprises a first section connected to the wheel mechanism and a second section pivotally connected to the linkage assembly, the first section pivotally connected to the second section.

6. The stroller of claim 5, wherein the second section comprises a first end pivotally connected to the first frame, a second end pivotally connected to the third push rod, and a third end pivotally connected to the first section, and wherein when the first latch assembly is in the locked state, a line connecting the first end, the second end, and the third end forms an obtuse triangle.

7. The stroller of claim 6, wherein the second section includes a main body portion and a bridge portion connecting the main body portion, the bridge portion being arcuate, the first and second ends being formed on the main body portion, and the third end being formed on the bridge portion.

8. The stroller of claim 6, wherein the second push bar, the third push bar, the first end, and the second end are co-linearly disposed when the stroller is in the deployed state.

9. The stroller of claim 8, wherein the first frame includes a connecting section and a pivot section connected to the connecting section, the wheel mechanism being mounted to the connecting section, the pivot section including a first pivot end pivotally connected to the second frame and a second pivot end pivotally connected to the linkage assembly;

when the stroller is in the unfolded state, the second push rod, the third push rod, the first end, the second end and the pivoting section are arranged in a collinear manner.

10. The stroller of any one of claims 1 to 9, wherein the stroller comprises a linkage element connecting the first latch assembly and the second latch assembly, wherein the linkage element drives the second latch assembly to switch from the locked state to the unlocked state when the unlocking member drives the first latch assembly to switch from the locked state to the unlocked state.

Background

The baby stroller is a travel tool designed for infants, and is convenient for adults to carry the infants when the adults go out. Stroller designs are typically foldable mechanisms for easy carrying and storage. However, the existing stroller is inconvenient to carry when going out because the length of part of the rod pieces is large due to design problems, such as the push rod, the support rod and the like, so that the stroller still occupies a large space after being folded.

Disclosure of Invention

The invention provides a child stroller convenient to carry.

The invention provides a foldable stroller, comprising: the seat assembly comprises a support assembly, a push rod assembly, a connecting rod assembly, a seat assembly, a first locking assembly, a second locking assembly and an unlocking piece, wherein the support assembly comprises a first support, a second support pivoted to the first support and a plurality of wheel mechanisms respectively arranged on the first support and the second support; the push rod assembly comprises a first push rod, a second push rod pivoted to the first push rod and a third push rod pivoted to the second push rod, and the third push rod is pivoted to the second support; the connecting rod assembly is respectively pivoted to the first bracket and the second bracket; the seat assembly comprises a seat rod and a seat connecting rod connected with the seat rod, and the seat connecting rod is respectively pivoted to the connecting rod assembly and the third push rod; the armrest component is respectively pivoted with the push rod component and the seat component; the first locking component is connected with the first push rod and the second push rod and has a locking state for preventing the first push rod from rotating relative to the second push rod and an unlocking state for allowing the first push rod to rotate relative to the second push rod; the second lock catch assembly is used for locking the armrest assembly and the push rod assembly and has a locking state for preventing the armrest assembly from rotating relative to the push rod assembly and an unlocking state for allowing the armrest assembly to rotate relative to the push rod assembly; the unlocking piece is used for driving the first locking assembly to be switched from the locking state to the unlocking state, and is used for driving the second locking assembly to be switched from the locking state to the unlocking state.

Further, the connecting rod assembly comprises a first connecting rod pivoted to the first bracket, a second connecting rod pivoted to the second bracket, a third connecting rod pivoted to the first connecting rod and the second connecting rod, a turnover part pivoted to the second bracket, the first connecting rod, the third connecting rod and the seat connecting rod, and a fourth connecting rod pivoted to the turnover part, the second connecting rod and the second bracket; the first connecting rod, the third connecting rod and the turnover piece are pivoted through the same rotating shaft, the second support, the fourth connecting rod and the turnover piece are pivoted through the same rotating shaft, and the turnover piece is turned over when the stroller is folded

Furthermore, the connecting rod assembly comprises a first connecting rod pivoted to the first support, a second connecting rod pivoted to the second support, and a turnover mechanism pivoted to the first connecting rod, the second support and the seat connecting rod, and the turnover mechanism is turned over when the stroller is folded.

Furthermore, the turnover part is triangular, and the first connecting rod, the fourth connecting rod and the seat connecting rod are respectively pivoted at three vertex angles of the triangle.

Further, the second bracket includes a first section connected to the wheel mechanism and a second section pivotally connected to the link assembly, and the first section is pivotally connected to the second section.

Furthermore, the second section comprises a first end pivoted to the first support, a second end pivoted to the third push rod, and a third end pivoted to the first section, and when the first locking component is in a locked state, a connecting line of the first end, the second end, and the third end forms an obtuse triangle.

Further, the second section includes a main body portion and a bridging portion connected to the main body portion, the bridging portion is arc-shaped, the first end and the second end are formed on the main body portion, and the third end is formed on the bridging portion.

Further, when the stroller is in the unfolded state, the second push rod, the third push rod, the first end and the second end are arranged in a collinear manner.

Furthermore, the first support comprises a connecting section and a pivoting section connected with the connecting section, the wheel mechanism is mounted on the connecting section, and the pivoting section comprises a first pivoting end pivoted with the second support and a second pivoting end pivoted with the connecting rod assembly; when the stroller is in the unfolded state, the second push rod, the third push rod, the first end, the second end and the pivoting section are arranged in a collinear manner.

Furthermore, the child stroller comprises a linkage element, the linkage element is connected with the first locking component and the second locking component, the unlocking component drives the first locking component to switch from the locking state to the unlocking state, and the linkage element drives the second locking component to switch from the locking state to the unlocking state.

According to the folding stroller, the length of the push rod assembly after being folded for multiple times is smaller, the size of the folded stroller is favorably reduced, the carrying and the storage are convenient, the first unlocking assembly and the second unlocking assembly can be unlocked through the unlocking piece, the folding steps are favorably simplified, and the user experience is improved.

Drawings

Fig. 1 is a perspective view of one embodiment of the stroller of the present invention.

Fig. 2 is a side schematic view of the stroller shown in fig. 1.

Fig. 3 is an exploded view of the first and second latch assemblies of the stroller of fig. 1.

Fig. 4-6 are schematic views of the folding process of the stroller shown in fig. 1.

Fig. 7 is a perspective view of another embodiment of the stroller of the present invention.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, the present invention provides a foldable stroller, which comprises a support assembly 1, a push rod assembly 2, a connecting rod assembly 3, a seat assembly 4, a first latch assembly 5, an unlocking assembly 6, a second latch assembly 7, and an armrest assembly 8, the supporting component 1 is used for supporting the whole trolley structure, the push rod component 2 is used for providing a user and transmitting acting force applied by the user, the connecting rod component 3 is used for connecting each component, so as to maintain the stroller in a stable unfolded state, the seat assembly 4 for seating a child, the first latch assembly 5 and the second latch assembly 7 for locking the stroller in the unfolded state, the unlocking assembly is used for driving the first locking assembly to switch from the locking state to the unlocking state and driving the second locking assembly to switch from the locking state to the unlocking state.

The supporting assembly 1 includes a first bracket 11, a second bracket 12 pivotally connected to the first bracket 11, and a plurality of wheel mechanisms 10 respectively mounted on the first bracket 11 and the second bracket 12. In the present embodiment, the first bracket 11 is a front bracket, the second bracket 12 is a rear bracket, and the wheel mechanism 10 includes a wheel and a link rod connected between the wheel and the first bracket 11 (or the second bracket 12). "articulated" is understood to mean a rotatable connection.

The first frame 11 is substantially U-shaped, and includes a connecting section 111 having a U-shape and two pivoting sections 112 connected to the connecting section, the wheel mechanism 10 is fixed to the connecting section 111, the pivoting sections 112 include a first pivoting end 1121 pivotally connected to the second frame 12 and a second pivoting end 1122 pivotally connected to the connecting rod assembly 3, and when the stroller is in the unfolded state, the push rod assembly 2 and the pivoting sections 112 are arranged in a collinear manner. It is noted that "co-linear arrangement" in the present invention is understood to mean that the centerlines of the two are co-linear or nearly co-linear (e.g., less than 10 degrees).

The second bracket 12 includes a first section 121 connected to the wheel mechanism 10 and a second section 122 connected to the connecting rod assembly 3, the first section 121 is pivotally connected to the second section 122, the second section 122 includes a first end 1221 pivotally connected to the first bracket 11, a second end 122 pivotally connected to the push rod assembly 2, and a third end 1223 pivotally connected to the first section 121, and when the first locking assembly 5 is in the locked state, a line connecting the first end 1221, the second end 1222, and the third end 1223 forms an obtuse triangle. The second section 122 includes a main body portion 1224 and a bridge portion 1225 connected to the main body portion 1224, the bridge portion 1225 is pivotally connected to the first section 121 and has an arc shape, the first end 1221 and the second end 1222 are formed on the main body portion 1224, and the third end 1223 is formed on the bridge portion 1225. The second bracket 12 is designed to be a sectional structure to allow it to be folded, which is advantageous in reducing its folded size, particularly in the lengthwise direction.

The push rod assembly 2 includes a first push rod 21, a second push rod 22 pivotally connected to the first push rod 21, and a third push rod 23 pivotally connected to the second push rod 22, wherein the third push rod 23 is pivotally connected to the second end 1222 of the second section 122. The first push rod 21 has a substantially v-21274l shape, a lateral (horizontal or substantially horizontal) portion of the first push rod 21 serves as a grip portion for a user, and the second push rod 22 and the third push rod 23 are linear and are two in number. When the stroller is in the unfolded state, the second push rod 22, the third push rod 23, the first end, the second end and the pivot section 112 are collinear (as shown in fig. 1 and 2), so that the applied force is approximately directly directed to the wheel structure, and a user can push the stroller with a small force.

The link assembly 3 is pivotally connected to the first bracket 11 and the second bracket 12, and includes a first link 31 pivotally connected to the first bracket 11, a second link 32 pivotally connected to the second bracket 12, a third link 33 pivotally connected to the first link 31 and the second link 32, a tilting member 30 pivotally connected to the second bracket 12, the first link 31, the third link 33, and the seat assembly 4 (or the seat connecting rod 42), and a fourth link 34 pivotally connected to the tilting member 30, the second link 32, and the second bracket 12. The first link 31, the third link 33 and the flip 30 are pivotally connected by a same rotation shaft, and the second bracket 12 (or the main body 1224), the fourth link 34 and the flip 30 are pivotally connected by a same rotation shaft. The tilting member 30 is triangular, and the first link 31, the fourth link 34 (or the second bracket 12) and the seat connecting rod 42 are respectively pivoted at three top corners of the triangle. The flip 30 flips when the stroller is folded, "flipping" is understood to mean rotating along the axis of movement. The turning member 30 is a three-bar linkage mechanism fixedly connected end to end in sequence and is triangular, in other embodiments, the first link 31, the fourth link 34 (or the second bracket 12), and the seat link 42 may also be pivotally connected to three sides of the triangle, or pivotally connected to the vertex angle and the side of the triangle respectively; of course, the structure of the flipper 30 can be varied, such as a four-bar linkage, a five-bar linkage, etc.

The seat assembly 4 includes a seat post 41, the seat connecting rod 42 connected to the seat post 41, and a blocking plate 43, the seat connecting rod 42 extends downward and rearward from two sides of the seat post 41 and is pivotally connected to the third push rod 23 and the fourth connecting rod 34, respectively, and the blocking plate 43 extends downward and forward from the seat post 41. The seat post 41 is used for supporting a seat portion (not shown), such as a fabric structure sleeved on the seat post 41, the blocking piece 43 is used for assisting the leg of the child, and the seat connecting rod 42 is used for receiving the supporting force of the supporting assembly 1 to support the seat post 41 and the blocking piece 43.

The stroller further includes an armrest assembly 8, the armrest assembly 8 is located above the seat assembly and is pivotally connected to the second push rod 22 (or the push rod assembly 2) and the seat rod 41, respectively. The armrest assembly 8 is used for holding by a child while also preventing the child from rolling forward and falling.

When the rotating shaft (not shown, the same below) connecting the second push rod 22 and the third push rod 23 is locked, the second push rod 22, the third push rod 23, the armrest assembly 8, the seat rod 41 and the seat connecting rod 42 form a stable multi-link mechanism; when the rotating shaft connecting the seat connecting rod 42 and the third push rod 23 is locked, the third push rod 23, the seat connecting rod 42, the turnover piece 30 and the second section 122 form a stable multi-link mechanism; when the rotating shaft between the second section 122 and the turnover piece 30 is locked, the second section 122, the first bracket 11, the first link 31 and the turnover piece 30 form a stable multi-link mechanism; when the rotating shaft connecting the second link 32 and the fourth link 34 is locked, the second section 122, the first section 121, the second link 32 and the fourth link 34 form a stable multi-link mechanism. That is, the entire cart can be locked as long as the rotation shaft connecting the second push rod 22 and the third push rod 23 is locked.

The first locking assembly 5 is connected to the first push rod 21 and the second push rod 22, and has a locked state for preventing the first push rod 21 from rotating relative to the second push rod 22 and an unlocked state for allowing the first push rod 21 to rotate relative to the second push rod 22. Referring to fig. 3, the first locking assembly 5 includes a first joint 51 connected to the first push rod 21, a second joint 52 connected to the second push rod 22, a first locking member 53 disposed in a space enclosed by the first joint 51 and the second joint 52, and a first rotating member 54. The first locking member 53 is substantially gear-shaped and includes a plurality of protrusions arranged along a circumferential direction, the first joint 51 includes a first receiving cavity 510 matched with the first locking member 53 in a shape and a first rotating shaft 511 (i.e. the rotating shaft connecting the first push rod 21 and the second push rod 22) extending from the first receiving cavity 510 to the second joint 52, the second joint 52 includes a second receiving cavity (not shown) matched with the first locking member 53 in a shape, and the second joint 52 is rotatably mounted on the first rotating shaft 511 of the first joint 51. When the first locking member 53 is located in the first receiving cavity 510 and the second receiving cavity, the inner walls of the first receiving cavity 510 and the second receiving cavity prevent the first joint 51 from rotating relative to the second joint 52. The first rotating member 54 is sleeved on the first rotating shaft 511 and fixed to the second joint 52.

With reference to fig. 1 to fig. 3, the unlocking unit 6 includes a first unlocking component, the first unlocking component is an unlocking button, the unlocking unit 6 is installed outside the second joint 52 and abuts against the first locking component 53, when the user presses the unlocking button 6 along the transverse direction (toward the second joint), the first locking component 53 is separated from the second accommodating cavity, the inner wall of the second accommodating cavity no longer blocks the second joint 52 from rotating relative to the first joint 51, that is, the first push rod 21 connected to the first joint 51 can rotate relative to the second push rod connected to the second joint 52, that is, the unlocking unit 6 is used for driving the first locking component to switch from the locking state to the unlocking state. In other embodiments, the unlocking member 6 may be other unlocking structures, such as a pull cord; the position of the unlocking member 6 may also be changed, for example, by being provided to the first push rod 21.

The second locking assembly 7 is connected with the second push rod 22 and the third push rod 23, and has a locking state for preventing the second push rod from rotating relative to the third push rod and an unlocking state for allowing the second push rod to rotate relative to the third push rod. The second locking assembly 7 includes a third joint 71 connected to the second push rod 22, a fourth joint 72 connected to the third push rod 23, a second locking member 73 and a third rotating member 74 disposed in a space enclosed by the third joint 71 and the fourth joint 72. The third joint includes a third receiving cavity 710, a second rotating shaft 711 (i.e. the rotating shaft connecting the second push rod 22 and the third push rod 23) extending from the third receiving cavity toward the fourth joint, and a guiding structure 712. The structure of the second locking assembly 7 is substantially the same as the structure of the first locking assembly 5. The second rotating member 74 is sleeved on the second rotating shaft 711 and can drive the fourth joint to rotate relative to the second rotating shaft 711. When the second rotating member 74 rotates relative to the second rotating shaft 711, due to the action of the guiding structure 712 and the guiding surface of the third joint, the second rotating member 74 rotates while laterally displacing and laterally pressing the second locking member 73, so that the second locking member 73 is separated from the third accommodating cavity 710, and the third joint 71 connected with the second push rod 2 is allowed to rotate relative to the fourth joint 72 connected with the third push rod, i.e., the second locking member is driven to switch from the locking state to the unlocking state, thereby unlocking the entire frame.

In other embodiments, the second locking assembly can also directly lock the third push rod 43 (or the push rod assembly 4) and the armrest assembly 8 from rotating relative to each other; the above-mentioned embodiment can be regarded as a stable structure formed by the second push rod 22, the third push rod 23, the armrest assembly 8 and the seat connecting rod 42, and indirectly locks the third push rod 43 (or the push rod assembly 4) and the armrest assembly 8 by locking the second push rod 42 and the third push rod 43. Therefore, it can be said that the second latch assembly 7 has a locked state preventing the armrest assembly 8 from rotating relative to the push rod assembly 2 and an unlocked state allowing the armrest assembly 8 to rotate relative to the push rod assembly 2.

The stroller further comprises a linkage element 9, in this embodiment, the linkage element 9 selects a pull rope, the linkage element 9 connects the first rotating member 54 and the second rotating member 74, and when the user presses the unlocking member 6, the first locking member 5 is unlocked, and the second joint 52 is allowed to rotate relative to the first joint 51, that is, the first push rod 21 is allowed to rotate relative to the second push rod 22; the second joint 52 simultaneously drives the first rotating member 54 to rotate, the first rotating member 54 drives the second rotating member 74 to rotate through the linking element 9, and the second rotating member 74 unlocks the second locking assembly 7 when driving the fourth joint 72 to rotate relative to the third joint 73, allowing the third push rod 23 to rotate relative to the second push rod 22, thereby unlocking the second locking assembly 7. That is, the unlocking of the entire vehicle body frame can be achieved by simply pressing the unlocking member 6. The unlocking part 6 drives the second locking component 7 to switch from the locking state to the unlocking state through the first locking component 5 and the linkage part 9. Through linkage mode unblock, be favorable to simplifying the folding step of children's shallow, bring better user experience. Of course, in other embodiments, a second unlocking member for driving the second latch assembly may be provided separately without providing the linkage element, that is, the unlocking member includes a first unlocking member and a second unlocking member.

Referring to fig. 4, when the user presses the unlocking member 7, the first push rod 21 is turned over, so that the first push rod 21 is folded relative to the second push rod 22; referring to fig. 5, the second unlocking assembly is driven by the linkage element 9 to unlock, so that the second push rod 22 is allowed to fold relative to the third push rod 23, and the turnover member 30 is turned over to drive the first link 31, the second link 32, the third link 33, the first bracket 11 and the second bracket 12 to rotate; as shown in fig. 6, the fully folded stroller has a first push rod 21 abutting against the second push rod 22, a second push rod 22 abutting against the third push rod 23, and the third push rod 23 located between two second sections 122, wherein the folded length of the push rod assembly 2 is only one third of the unfolded length, and the folded size of the second bracket 12 is also reduced, so that the folded size of the stroller of the present invention is further reduced for carrying or storing.

Referring to fig. 7, in another embodiment, the stroller is substantially identical in structure to the previous embodiment, except for the linkage assembly. The link assembly 3 of the present embodiment includes a first link 31 pivotally connected to the first frame 11, a second link 32 pivotally connected to the second frame 12, and a turnover mechanism 35 pivotally connected to the first link 31 and the second link 32, wherein the turnover mechanism 35 is turned over when the stroller is folded. The link assembly 3 of the present embodiment is not provided with the third link, and the fourth link of the foregoing embodiment is fixed to the tumbler to form the flip structure 35. Similar to the foregoing embodiment, the folded size of the stroller of this embodiment can also be further reduced, which is convenient for carrying or storage; meanwhile, the structure of the embodiment is simpler, and the manufacturing cost is favorably reduced.

Although the present invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.