1. The three-degree-of-freedom automobile headrest is characterized in that: install the headrest fixing base of headrest body and locate the supporting seat of headrest fixing base rear side including the front end, the upper and lower both ends of supporting seat all are equipped with the moving member that can move towards headrest fixing base horizontal migration, the side of moving member is equipped with and is used for the spacing horizontal stop spare to the moving member, and the front end of moving member articulates there is the slider, vertical sliding connection is followed with the rear end of headrest fixing base to the slider, and the slider inside that is located the upper end is equipped with and is used for the spacing vertical stop spare to the headrest fixing base.

2. The three-degree-of-freedom automotive headrest according to claim 1, characterized in that: horizontal sliding grooves are formed in the upper end and the lower end of the front side face of the supporting seat; the moving part comprises a horizontal supporting rod in sliding fit with the horizontal sliding groove, and the front end of the horizontal supporting rod extends out of the horizontal sliding groove and is vertically hinged with the rear end of the moving part.

3. The three-degree-of-freedom automotive headrest according to claim 2, characterized in that: a first transverse hole part is arranged at the side of the front end of the horizontal sliding chute, and the first transverse hole part is communicated with the horizontal sliding chute through a first vertical hole part; the horizontal stop piece comprises a first electromagnet, a first stop pin and a first spring, the first electromagnet is installed in the first transverse hole part, the first stop pin is installed in the first vertical hole part, the upper end of the first stop pin extends out of the first vertical hole part, and the first spring is connected between the lower end of the first stop pin and the first electromagnet in an abutting mode; the horizontal support rod is provided with a plurality of first clamping grooves used for being matched with the first stop pins in a clamping mode at intervals along the length direction of the horizontal support rod.

4. The three-degree-of-freedom automotive headrest according to claim 2, characterized in that: the rear end of the horizontal supporting rod is provided with a first pulley capable of sliding along the horizontal sliding groove, the front end of the horizontal sliding groove is provided with a pair of guide wheels which are distributed up and down, and the horizontal supporting rod penetrates through the pair of guide wheels.

5. The three-degree-of-freedom automotive headrest according to claim 1, characterized in that: the middle part of the rear side surface of the headrest fixing seat is provided with a pair of vertical sliding grooves which are distributed left and right; the slider includes the slider, the left and right both sides of front end of slider all are equipped with the second pulley, second pulley and the vertical spout sliding fit who is located the homonymy.

6. The three-degree-of-freedom automotive headrest according to claim 5, characterized in that: a second vertical hole part is arranged in the slider positioned at the upper end, and the middle part of the second vertical hole part is communicated with a second transverse hole part; the vertical stop piece comprises a second electromagnet, a second stop pin and a second spring, the second electromagnet is installed in the second vertical hole part, the second stop pin is installed in the second transverse hole part, the front end of the second stop pin extends out of the second transverse hole part, and the second spring is abutted between the rear end of the second stop pin and the second electromagnet; the middle part of the rear side face of the headrest fixing seat is provided with a plurality of second clamping grooves used for being in clamping fit with the second stop pins at intervals along the vertical direction.

7. The three-degree-of-freedom automotive headrest according to claim 5, characterized in that: the section of the vertical sliding groove is T-shaped; the second pulley includes that one end is connected with the slider, the other end stretches into the inside connecting rod of vertical spout, left pulley and right pulley are installed to the one end that the connecting rod is located vertical spout inside.

8. A working method of a three-degree-of-freedom automobile headrest is characterized in that: the three-degree-of-freedom automobile headrest according to any one of claims 1 to 7 comprises the following steps in operation:

step S1: the first electromagnet attracts the first stop pin to be separated from the first clamping groove, and the second electromagnet attracts the second stop pin to be separated from the second clamping groove;

step S2, manual adjustment:

step S21, pitch adjustment: the front and back relative positions of the horizontal support rods at the upper end and the lower end of the support seat are adjusted, so that the pitch and elevation angles of the headrest body are adjusted;

step S22, front-back adjustment: the front and rear positions of the headrest body are adjusted by adjusting the front and rear positions of the horizontal support rods at the upper and lower ends of the support seat relative to the support seat;

step S23, adjust up and down: the headrest body is moved vertically, and the up-down relative position of the headrest body relative to the horizontal support rod is adjusted, so that the up-down position of the headrest body is adjusted;

step S3: the first stop pin is clamped with the first clamping groove under the pushing of the first spring, so that the horizontal support rod cannot move forwards and backwards; the second stop pin is clamped with the second clamping groove under the pushing of the second spring, so that the headrest body cannot move up and down.

Background art:

in the world, the automobile technology is rapidly improved, the automobile seat as an important component of an automobile becomes a systematic product integrating multiple technologies, and the safety and the comfort of the automobile seat are greatly improved. But the multi-degree-of-freedom adjustment of the automobile headrest is not perfect, and the headrest is easy to loosen, so that the use is inconvenient.

The invention content is as follows:

the invention aims at solving the problems existing in the prior art, namely the invention aims to provide a three-degree-of-freedom automobile headrest and a working method thereof, and the three-degree-of-freedom automobile headrest is reasonable in design and convenient to use.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a three degree of freedom's car headrest, includes that the headrest fixing base of headrest body is installed to the front end and the supporting seat of locating headrest fixing base rear side, the upper and lower both ends of supporting seat all are equipped with the moving member that can move towards headrest fixing base horizontal migration, the side of moving member is equipped with and is used for the spacing horizontal stop to the moving member, and the front end of moving member articulates there is the slider, vertical sliding connection is followed with the rear end of headrest fixing base to the slider that is located the upper end, and the inside vertical stop who is used for spacing to the headrest fixing base that is equipped with of slider that is located the upper end.

Furthermore, horizontal sliding grooves are formed in the upper end and the lower end of the front side face of the supporting seat; the moving part comprises a horizontal supporting rod in sliding fit with the horizontal sliding groove, and the front end of the horizontal supporting rod extends out of the horizontal sliding groove and is vertically hinged with the rear end of the moving part.

Furthermore, a first transverse hole part is arranged beside the front end of the horizontal sliding chute, and the first transverse hole part is communicated with the horizontal sliding chute through a first vertical hole part; the horizontal stop piece comprises a first electromagnet, a first stop pin and a first spring, the first electromagnet is installed in the first transverse hole part, the first stop pin is installed in the first vertical hole part, the upper end of the first stop pin extends out of the first vertical hole part, and the first spring is connected between the lower end of the first stop pin and the first electromagnet in an abutting mode; the horizontal support rod is provided with a plurality of first clamping grooves used for being matched with the first stop pins in a clamping mode at intervals along the length direction of the horizontal support rod.

Furthermore, a first pulley capable of sliding along a horizontal sliding groove is installed at the rear end of the horizontal supporting rod, a pair of guide wheels distributed up and down is arranged at the front end of the horizontal sliding groove, and the horizontal supporting rod penetrates through the pair of guide wheels.

Furthermore, a pair of vertical sliding chutes which are distributed left and right are arranged in the middle of the rear side surface of the headrest fixing seat; the slider includes the slider, the left and right both sides of front end of slider all are equipped with the second pulley, second pulley and the vertical spout sliding fit who is located the homonymy.

Furthermore, a second vertical hole part is arranged in the slider positioned at the upper end, and the middle part of the second vertical hole part is communicated with a second transverse hole part; the vertical stop piece comprises a second electromagnet, a second stop pin and a second spring, the second electromagnet is installed in the second vertical hole part, the second stop pin is installed in the second transverse hole part, the front end of the second stop pin extends out of the second transverse hole part, and the second spring is abutted between the rear end of the second stop pin and the second electromagnet; the middle part of the rear side face of the headrest fixing seat is provided with a plurality of second clamping grooves used for being in clamping fit with the second stop pins at intervals along the vertical direction.

Furthermore, the section of the vertical sliding groove is T-shaped; the second pulley includes that one end is connected with the slider, the other end stretches into the inside connecting rod of vertical spout, left pulley and right pulley are installed to the one end that the connecting rod is located vertical spout inside.

The other technical scheme adopted by the invention is as follows: a working method of a three-degree-of-freedom automobile headrest comprises the following steps of:

step S1: the first electromagnet attracts the first stop pin to be separated from the first clamping groove, and the second electromagnet attracts the second stop pin to be separated from the second clamping groove;

step S2, manual adjustment:

step S21, pitch adjustment: the front and back relative positions of the horizontal support rods at the upper end and the lower end of the support seat are adjusted, so that the pitch and elevation angles of the headrest body are adjusted;

step S22, front-back adjustment: the front and rear positions of the headrest body are adjusted by adjusting the front and rear positions of the horizontal support rods at the upper and lower ends of the support seat relative to the support seat;

step S23, adjust up and down: the headrest body is moved vertically, and the up-down relative position of the headrest body relative to the horizontal support rod is adjusted, so that the up-down position of the headrest body is adjusted;

step S3: the first stop pin is clamped with the first clamping groove under the pushing of the first spring, so that the horizontal support rod cannot move forwards and backwards; the second stop pin is clamped with the second clamping groove under the pushing of the second spring, so that the headrest body cannot move up and down.

Compared with the prior art, the invention has the following effects: the automobile headrest adjusting device is reasonable in structural design, can realize height adjustment, pitching angle adjustment and front-back position adjustment of the automobile headrest, improves the use comfort level, and solves the problem that the existing automobile headrest is difficult to adjust multiple degrees of freedom.

Description of the drawings:

FIG. 1 is a schematic diagram of a right-view configuration of an embodiment of the present invention;

fig. 2 is a schematic view showing a state in which the headrest body is moved downward to the extreme position in the embodiment of the invention;

fig. 3 is a schematic view showing a state in which the headrest body is moved upward to the extreme position in the embodiment of the invention;

fig. 4 is a schematic view showing a state in which the headrest body is moved forward to the extreme position in the embodiment of the invention;

FIG. 5 is a schematic view of the extreme position of the pitch angle of the headrest body in the embodiment of the invention;

FIG. 6 is a schematic view of the maximum pitch angle, extreme position of the highest position of the headrest body in an embodiment of the invention;

FIG. 7 is a schematic top view of a horizontal support bar in an embodiment of the present invention;

FIG. 8 is a rear view of the headrest mounting base in an embodiment of the invention;

fig. 9 is a schematic top view of a slider engaged with a headrest mounting bracket according to an embodiment of the present invention.

In the figure:

1-a support seat; 2-horizontal chute; 3-a first pulley; 4-horizontal support bar; 5-a first card slot; 6-a guide wheel; 7-a first retaining pin; 8-a first spring; 9-a first electromagnet; 10-a block; 11-a hinged axis; 12-a headrest body; 13-vertical chutes; 14-a second card slot; 15-a second electromagnet; 16-a second spring; 17-a second card slot; 18-a slide block; 19-headrest fixing seat; 20-a first transverse bore portion; 21-a first longitudinal bore portion; 22-a second transverse bore portion; 23-a second longitudinal bore portion; 24-a second pulley; 241-a connecting rod; 242-left pulley; 243-right pulley; 25-a moving member; 26-a slide; 27-a horizontal stop; 28-a vertical stop; 29-second stop pin.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1 to 9, the three-degree-of-freedom automobile headrest of the present invention includes a headrest body 12, a headrest fixing seat 19 and a supporting seat 1, which are sequentially arranged from front to back, the headrest body 12 is installed at the front end of the headrest fixing seat 19, a certain distance is provided between the headrest fixing seat 19 and the supporting seat 1, moving members 25 capable of moving horizontally towards the headrest fixing seat 19 are respectively disposed at the upper and lower ends of the supporting seat 1, and horizontal stoppers 27 for limiting the moving members are disposed beside the moving members 25, so as to fix the moving members after moving for a certain distance; the front end of the moving member 25 is hinged with a sliding member 26, the sliding member 26 is connected with the rear end of the headrest fixing seat 19 in a vertical sliding manner, and a vertical stop member 28 for limiting the headrest fixing seat 19 is arranged inside the sliding member 26 positioned at the upper end so as to fix the headrest body after moving up and down for a certain distance.

In the embodiment, horizontal sliding grooves 2 are respectively arranged at the upper end and the lower end of the middle part of the front side surface of the supporting seat 1; the moving member 25 includes the horizontal support rod 4 in sliding fit with the horizontal sliding groove 2, the front end of the horizontal support rod 4 extends out of the horizontal sliding groove 2 and is hinged to the rear end of the sliding member 26 along the vertical direction through the hinge shaft 11 which is longitudinally arranged, and the sliding member can rotate up and down around the hinge shaft.

In this embodiment, a first transverse hole portion 20 is disposed in parallel at a front end side of the horizontal sliding chute 2, and the first transverse hole portion 20 is communicated with the horizontal sliding chute 2 through a first vertical hole portion 21; the horizontal stop member 27 comprises a first electromagnet 9, a first stop pin 7 and a first spring 8, the first electromagnet 9 is installed in the first transverse hole portion 20, the first stop pin 7 is installed in the first vertical hole portion 21, the upper end of the first stop pin extends out of the first vertical hole portion 21, the first spring 8 is vertically arranged in the first vertical hole portion 21, and the first spring 8 is abutted between the lower end of the first stop pin 7 and the first electromagnet 9; the horizontal support rod 4 is provided with a plurality of first clamping grooves 5 at intervals along the length direction, and the first clamping grooves are used for being in clamping fit with the first stop pins 7. When in work: when the first electromagnet 9 is powered on, the first electromagnet 9 attracts the first stop pin 7 to move downwards and is separated from the first clamping groove 5, at the moment, the first stop pin 7 extrudes the first spring 8, and due to the lack of limiting of the first stop pin 7, the horizontal support rod 4 can move forwards and backwards along the horizontal sliding groove 2; when first electro-magnet 9 outage, first stop pin 7 no longer receives the attraction of first electro-magnet 9, and the elasticity of first spring 8 promotes first stop pin 7 rebound and the card is established in one of them first draw-in groove 5, cooperatees through first stop pin 7 and first draw-in groove 5 this moment, realizes spacing the removal of horizontal support bar 4, plays the effect of fixing horizontal support bar.

In this embodiment, in order to guide and support the front and rear movement of the horizontal support rod, the first pulley 3 capable of sliding along the horizontal sliding groove is installed at the rear end of the horizontal support rod 4, the front end of the horizontal sliding groove 2 is provided with a pair of guide wheels 6 distributed up and down, and the horizontal support rod 4 passes through between the pair of guide wheels 6.

In this embodiment, a pair of vertical sliding grooves 13 distributed left and right is arranged in the middle of the rear side surface of the headrest fixing seat 19; the sliding part 26 comprises a sliding block 18, a pair of second pulleys 24 which are distributed up and down are arranged on the left side and the right side of the front end of the sliding block 18, and the pair of second pulleys 24 is in sliding fit with the vertical sliding groove 13 which is positioned on the same side, so that the headrest body and the headrest fixing seat can move up and down vertically.

In this embodiment, a second vertical hole portion 23 is provided inside the slider 18 at the upper end of the support seat 1, and a second horizontal hole portion 22 is communicated with the middle of the second vertical hole portion 23; the vertical stop member 28 comprises a second electromagnet 15, a second stop pin 29 and a second spring 16, the second electromagnet 15 is installed in the second vertical hole portion 23, the second stop pin 29 is installed in the second transverse hole portion 22, the front end of the second stop pin 29 extends out of the second transverse hole portion 22, the second spring 16 is horizontally arranged in the second transverse hole portion 22, and the second spring 16 is abutted between the rear end of the second stop pin 29 and the second electromagnet 15; the middle part of the back side face of the headrest fixing seat 19 is provided with a plurality of second clamping grooves 17 which are used for being clamped and matched with the second stop pin 29 at intervals along the vertical direction, and the plurality of second clamping grooves 17 are located between the vertical sliding grooves 13 at the two sides. When in work: when the second electromagnet 15 is powered on, the second electromagnet 15 attracts the second stop pin 29 to move backwards and separate from the second slot 17, at this time, the second spring 16 is extruded by the second stop pin 29, and due to the lack of the limit of the second stop pin 29, the headrest fixing seat 19 can move up and down along the vertical direction; when the second electromagnet 15 is powered off, the second stop pin 29 is no longer attracted by the second electromagnet 15, the second stop pin 29 is pushed by the elastic force of the second spring 16 to move forwards and be clamped in one of the second clamping grooves 17, and at the moment, the second stop pin 29 is matched with the second clamping groove 17, so that the vertical movement of the headrest fixing seat 19 is limited, and the effect of fixing the headrest fixing seat is achieved.

In this embodiment, as shown in fig. 9, the cross section of the vertical sliding groove 13 is T-shaped; the second pulley 24 includes an L-shaped connecting rod 241, one end of which is connected to the slider 18 and the other end of which extends into the vertical sliding groove 13, a left pulley 242 and a right pulley 243 are installed at one end of the connecting rod 241 located inside the vertical sliding groove 13, and the left pulley and the right pulley are respectively located at the left end and the right end of the vertical sliding groove. The second pulleys distributed by adopting the T-shaped structure are matched with the T-shaped vertical sliding groove, so that the situation that the second pulleys are separated from the headrest fixing seat easily in the front and back directions can be avoided.

In this embodiment, the stoppers 10 are fixed to the outer ends of the first electromagnet 9 and the second electromagnet 15.

In this embodiment, the cross-sectional shape of the first stop pin 7 is adapted to the shape of the first slot 5, and both are rectangular. The cross-sectional shape of the second stop pin 29 is also adapted to the shape of the second slot 17, and is also rectangular.

In this embodiment, the control circuits of the first electromagnet 9 and the second electromagnet 15 are connected in parallel and controlled by the same switch.

In this embodiment, the operation includes the following steps:

step S1: when the switch is pressed down, the two first electromagnets 9 and the second electromagnet 15 are electrified, the first electromagnet 9 attracts the first stop pin 7 to separate from the first clamping groove 5, so that the horizontal support rod 4 can slide back and forth along the horizontal sliding groove 2, and the second electromagnet 15 attracts the second stop pin 29 to separate from the second clamping groove 17, so that the headrest fixing seat 19 can vertically move up and down;

step S2, manual adjustment:

step S21, pitch adjustment: by adjusting the front and back relative positions of the horizontal support rods 4 at the upper and lower ends of the support seat 1, that is, as shown in fig. 5 and 6, the lengths of the two horizontal support rods 4 extending out of the horizontal chute 2 are different, so that the pitch and elevation angles of the headrest body 12 can be adjusted, that is, the first degree of freedom of the headrest is obtained;

step S22, front-back adjustment: by adjusting the front and back positions of the horizontal support rods 4 at the upper and lower ends of the support seat 1 relative to the support seat 1, that is, as shown in fig. 4, the two horizontal support rods 4 extend out of the horizontal sliding groove 2 by the same length and synchronously move in the front and back directions, the front and back positions of the headrest body 12 can be adjusted, that is, the second degree of freedom of the headrest is achieved;

step S23, adjust up and down: the headrest body 12 is moved vertically, and the up-down relative position of the headrest body 12 relative to the horizontal support rod 4 is adjusted, so that the up-down position of the headrest body 12 is adjusted, as shown in fig. 2 and 3, that is, the third degree of freedom of the headrest is obtained;

step S3: the first electromagnet 9 and the second electromagnet 15 are powered off, the first stop pin 7 moves upwards under the pushing of the elastic force of the first spring 8 and is clamped with the first clamping groove 5, and the horizontal support rod 4 cannot move forwards or backwards; the second stop pin 29 is pushed by the elastic force of the second spring 16 to move forward and is clamped with the second clamping groove 17, so that the headrest body 12 cannot move up and down; the whole headrest is locked by the first stop pin 7 and the second stop pin 29, and the whole headrest is ensured to be kept in a stable state after being adjusted.

In this embodiment, utilize electro-magnet, stop pin and spring to reach the effect of unblock and locking, the circuit of three electro-magnet is parallelly connected, presses the three electro-magnet of switch and circular telegram simultaneously and attracts three stop pin, and the stop pin breaks away from in the draw-in groove, and the device realizes the unblock, when headrest regulation is finished, presses the switch again, and three electro-magnet outage, magnetism disappears, and under the spring force effect, the stop pin blocks the draw-in groove, and the device locks.

The invention has the advantages that: the pitching angle of the headrest is adjusted by adjusting the front and back relative positions of the upper and lower horizontal support rods, the front and back positions of the headrest are adjusted by adjusting the front and back positions of the two horizontal support rods relative to the support seat, and the up and down positions of the headrest are adjusted by adjusting the upper and down relative positions of the headrest relative to the horizontal support rods, so that the three-degree-of-freedom adjustment of the automobile headrest is realized, the problem that the conventional automobile headrest is difficult to adjust the angle, the height and the pitching angle simultaneously is solved, a driver can conveniently adjust the headrest to adapt to different use conditions, the daily requirements of passengers can be met, and the automobile headrest can be suitable for different people groups; meanwhile, the whole structure is relatively simple, the comfort level is high, the replacement is convenient, and the device is more suitable for being put into life after production.

If the invention discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.

Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.