CN215097180U - Vehicle seat headrest - Google Patents

Abstract

The utility model provides a vehicle seat headrest, which comprises a support framework connected with a headrest rod, a front support, a ratchet part, an engaging part, a swing arm and an elastic part, wherein the front support is pivoted on the support framework; the meshing part is pivoted on the supporting framework and has meshing movement of the meshing ratchet part under the driving of elastic force, and a protruding part is fixed on the meshing part; the swing arm is pivoted on the ratchet part and is provided with a convex block; when the ratchet part pivots from the folding position to the unfolding position, the first pushing part contacts the swing arm, and when the front support continues to move, the first pushing part pushes the swing arm to swing, so that the bump contacts and presses the protrusion part; the elastic member is connected between the front support and the support frame. Vehicle seat headrest, only support before through the upset, support before can realizing and support locking and unblock between the skeleton, convenient operation not only, stability is good moreover.

Description

Vehicle seat headrest

Technical Field

The utility model relates to an automobile parts technical field, in particular to vehicle seat headrest.

Background

Currently, most six-way headrests of vehicles are formed by a foaming process (namely, a sewn cover is directly filled with a foaming material and formed at one time). A common disadvantage of such headrests is that they are unstable in flipping back and forth. The reason that the front and back overturning is unstable is mainly that the front support adjustment of the headrest is mainly realized by matching a rotating shaft and a clamp, so that the stability in use is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a vehicle seat headrest to improve stability during turning.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a vehicle seat headrest comprises a support framework and a front support, wherein the support framework is connected with a headrest rod; the front support is pivoted on the support framework to be operable to pivot between a retracted position and a deployed position, and further comprises a ratchet part, an engaging part, a swing arm and an elastic part, wherein:

the ratchet part is fixedly arranged on the front support so as to follow the pivoting of the front support; the ratchet part is provided with a first pushing part;

the meshing part is pivoted on the supporting framework and has meshing motion for meshing the ratchet part under the driving of elastic force, and a protrusion part is fixed on the meshing part;

when the ratchet part and the meshing part are in a meshed state, the ratchet part pivots along with the front support from the retracted position to the deployed position in a single direction;

the swing arm is pivoted on the ratchet part and provided with a lug; when the ratchet part pivots from the folding position to the unfolding position, the first pushing part contacts the swing arm, and when the front support continues to move, the first pushing part pushes the swing arm to swing, so that the lug is contacted with and presses the protrusion part downwards;

the elastic piece is connected between the front support and the support framework, and when the front support is pivoted from the retracted position to the deployed position, the elastic piece can elastically store energy.

Furthermore, be equipped with the cooperation portion of promoting on the pivot route of first promotion portion, cooperation portion of promoting links firmly in on the swing arm, just cooperation portion of promoting can by first promotion portion promotes.

Further, the first pushing part is an arc-shaped through hole formed in the ratchet part, and the pushing matching part is fixed on one side of the swing arm and extends to be kept in the arc-shaped through hole;

when the ratchet part pivots from the retracted position to the deployed position along with the front support, the push fit part is transited from one arc-shaped end of the arc-shaped through hole to the other arc-shaped end.

Furthermore, the free end of the push fit part is provided with a limiting block, and the limiting block passes through the arc-shaped through hole and keeps clearance fit with the side face of the ratchet part.

Further, the engaging part is pivoted on the supporting framework through a pivot shaft;

the pivot shaft is sleeved with a torsion spring which is supported between the support framework and the meshing part, and the torsion spring is used for driving the meshing part to have meshing movement which is meshed with the ratchet part.

Furthermore, the ratchet parts are two in interval distribution along the width direction of the support framework.

Further, the anterior support includes an anterior support main and two ear wing portions, wherein:

the front support main body is pivoted on the support framework;

the two ear wing parts are respectively connected with two sides of the front support main body through damping hinges.

Further, the torque of the damping hinge when the ear wing portion is folded forward relative to the front support body is smaller than the torque of the damping hinge when the ear wing portion is folded backward relative to the front support body.

Furthermore, the support framework is inserted on the two headrest rods in a sliding and adjustable manner.

Furthermore, a plurality of clamping grooves are distributed in the axial direction of the headrest rod, and an unlocking mechanism is arranged on the support framework;

the unlocking mechanism comprises an unlocking main body and a clamp spring assembled on the unlocking main body;

the unlocking main body is kept on the support framework in a sliding mode along an axial direction perpendicular to the headrest rod, and a second pushing part is arranged on the unlocking main body;

the clamp spring ring is circumferentially arranged around the headrest rod so as to be clamped into the clamp groove in a natural state, one end of the clamp spring is fixedly connected to the unlocking main body, and the free end of the clamp spring extends to be arranged on a sliding path of the second pushing part;

and operating the unlocking main body to drive the second pushing part to slide, wherein the second pushing part pushes the free end of the clamp spring so that the clamp spring expands and is separated from the clamping groove for clamping.

Compared with the prior art, the utility model discloses following advantage has:

(1) the vehicle seat headrest of the utility model can lock the front support which is turned in place through the matching between the ratchet part and the meshing part, and has better locking stability; the front support can be returned only by reversely overturning the front support, so that the stability and the convenience of the headrest of the vehicle seat during overturning adjustment are improved.

(2) Through the cooperation of first promotion portion and promotion cooperation portion, can promote the swing arm motion, and do benefit to and carry out the unblock to the ratchet portion and the meshing portion of locking.

(3) The arc-shaped through hole is simple in structure, convenient to machine and form on the ratchet part and good in pushing effect.

(4) Do benefit to the stability in use that improves the portion of force-fit through setting up the stopper, and the simple structure of stopper is convenient for design implementation on the portion of force-fit.

(5) The structure of torsional spring is ripe, and the installation of being convenient for just does benefit to and improves the locking effect between meshing portion and the ratchet portion.

(6) By adopting the two ratchet parts, the stability of the front support in overturning is improved.

(7) Two auricle parts are connected on the preceding support main part through damping hinge, are convenient for carry out preceding book and back book to auricle part, and do benefit to the use travelling comfort that further improves the headrest.

(8) The torque of the damping hinge is different when the ear wing part is folded forwards and backwards, so that the ear wing part can be conveniently folded forwards, and the stability after the ear wing part is folded forwards can be kept.

(9) The position of the support framework on the headrest rod can be adjusted, and the flexibility of the headrest in use can be improved.

(10) Through operation unblock main part, can make the jump ring expansion and break away from the joint with the draw-in groove to be convenient for adjust the height of headrest, have better operation convenience.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a front support and support framework according to an embodiment of the present invention at a viewing angle;

fig. 2 is a schematic structural view of the front support and support framework of the embodiment of the present invention from another perspective;

fig. 3 is a schematic structural view of a front support according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the front support before and after being folded forward according to the embodiment of the present invention;

fig. 5 is a schematic structural view of the front support main body and the support framework according to the embodiment of the present invention at an angle of view;

fig. 6 is a schematic structural view of the front support body and the support framework in another view according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a support frame according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of the front support body according to the embodiment of the present invention at a viewing angle;

fig. 9 is a schematic structural view of the front support body according to an embodiment of the present invention at another viewing angle;

fig. 10 is a schematic structural view of a swing arm and an engaging portion according to an embodiment of the present invention;

fig. 11 is a front view of a front support body according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view taken in the direction A-A of the ratchet portion and the engagement portion of FIG. 11 in a stowed position;

FIG. 13 is a cross-sectional view taken in the direction A-A of the ratchet portion and the engagement portion of FIG. 11 in the deployed position;

FIG. 14 is a cross-sectional view taken in the direction A-A of the ratchet portion and the engagement portion of FIG. 11 when the lock is released;

fig. 15 is a schematic structural view of a supporting framework and an unlocking main body according to an embodiment of the present invention;

FIG. 16 is a sectional view taken along line B-B of FIG. 15;

fig. 17 is a schematic structural view of a headrest rod and an unlocking body according to an embodiment of the present invention;

fig. 18 is a schematic structural diagram of a clamp spring according to an embodiment of the present invention;

fig. 19 is a schematic structural view of a vehicle seat headrest before and after being turned over on a front support according to an embodiment of the present invention;

fig. 20 is a schematic structural view of a rear portion of a headrest for a vehicle seat according to an embodiment of the present invention;

fig. 21 is a schematic structural view of a front portion of a headrest for a vehicle seat according to an embodiment of the present invention;

description of reference numerals:

1. a support framework; 2. a front support; 3. unlocking the main body; 4. a headrest cover; 5. a housing;

101. a headrest rod; 102. an engaging plate; 103. a torsion spring; 104. a protruding block; 105. a limiting groove; 106. a middle plate; 107. a second pivot shaft; 108. a first pivot shaft; 109. a card slot; 110. a mounting seat; 111. a connecting projection; 112. mounting grooves; 113. a first protrusion;

201. a front support body; 202. an ear wing panel; 203. a ratchet plate; 204. swinging arms; 205. damping hinge mounting holes; 206. a side plate; 207. a bump; 208. an arc-shaped through hole; 209. a through hole; 210. a base plate; 211. a tension spring; 212. a first stopper; 213. a second limiting block; 214. a damping hinge; 215. mounting a boss; 216. pushing the protrusion;

301. a strip-shaped through hole; 302. a button; 303. a second protrusion; 304. a first spring; 305. a clamp spring; 306. a fixed end; 307. a pushing end; 308. mounting blocks;

401. a sleeve body; 402. a foam;

501. a front housing; 502. a rear housing.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The present embodiment relates to a vehicle seat headrest, which includes a support frame to which a headrest rod is connected and a front support, in overall configuration. Wherein the front support is pivotally connected to the support frame to be operable to pivot between a stowed position and a deployed position.

The headrest for a vehicle seat in this embodiment further includes a ratchet portion, an engagement portion, a swing arm, and an elastic member. Wherein, the ratchet part is fixedly arranged on the front support so as to follow the pivoting of the front support. The ratchet part is provided with a first pushing part. The engaging part is pivoted on the supporting framework and has engaging movement of the engaging ratchet part under the driving of elastic force, and a protrusion part is fixed on the engaging part. The ratchet part has one-way pivot from the folding position to the unfolding position along with the support under the meshing state of the ratchet part and the meshing part. (ii) a

The swing arm is pivoted on the ratchet part and is provided with a lug. When the ratchet part pivots from the folding position to the unfolding position, the first pushing part contacts the swing arm, and when the front support continues to move, the first pushing part pushes the swing arm to swing, so that the lug is contacted with and presses the protrusion part downwards. The elastic piece is connected between the front support and the support framework, and when the front support pivots from the retracted position to the deployed position, the elastic piece can elastically store energy.

Based on the above general description, the exemplary structure of the front support 2 and the support skeleton 1 described in the present embodiment is as shown in fig. 1 and 2, and the exemplary structure of the front support 2 is as shown in fig. 3 and 4, and in order to improve the use effect of the front support 2, the front support 2 in the present embodiment includes a front support main body 201 and two flap portions. The front supporting body 201 is pivoted to the supporting frame 1, and the two ear wings are connected to two sides of the front supporting body 201 via the damping hinges 214.

Each of the ear wing portions in this embodiment includes two ear wing plates 202 connected in a snap-fit manner, damping hinge mounting holes 205 are respectively formed in two sides of the front support main body 201, the damping hinges 214 are mounted in the damping hinge mounting holes 205, and the ear wing plates 202 after being snap-fit are mounted on the damping hinges 214. The damping hinge 214 in this embodiment can adopt a structure mature in the prior art, and is not described herein again.

In this embodiment, the torque of the damping hinge 214 when the ear flap 202 is folded forward relative to the front support body 201 is smaller than the torque of the damping hinge 214 when the ear flap 202 is folded backward relative to the front support body 201. So set up, be convenient for carry out the front folding to the auris cleft portion to do benefit to and keep the state of folding before, and do benefit to the stability in use that improves auris cleft plate 202.

Of course, the front support 2 in this embodiment may be formed integrally with the front support main body 201 and the two ear wing plates 202. However, the separate adjustment of the ear flap 202 is not possible, resulting in a less comfortable use.

The structure of the support frame 1 and the front support main body 201 in the connected state in the present embodiment is as shown in fig. 5 and 6, and an exemplary structure of the support frame 1 is as shown in fig. 7, and two headrest rods 101 are inserted into the support frame 1 from both sides of the support frame 1. The middle part of the supporting framework 1 is provided with a middle plate 106, the middle plate 106 and the two sides of the supporting framework 1 are arranged at intervals, and a space is provided for the use of the ratchet part.

In addition, the front support main body 201 is pivotally connected to the top of the support frame 1, a first pivot shaft 108 is pivotally arranged on the top of the support frame 1, and the axis of the first pivot shaft 108 is parallel to the width of the support frame 1. The engaging parts in this embodiment are two pivotally provided on the support frame 1 to improve the stability of the front support 2 in use.

To facilitate the installation of the engaging portions, two connecting protrusions 111 are provided on the support frame 1 at both sides of the bottom of the middle plate 106. Each of the coupling projections 111 has two side panels arranged at a distance from each other, and a bottom panel coupled between bottoms of the two side panels. A second pivot shaft 107 penetrating the side panel is provided in the connecting projection 111, and the engaging portion is fitted around the second pivot shaft 107. In this embodiment, a limiting groove 105 is provided at the bottom of the supporting frame 1 between the two headrest rods 101.

The exemplary structure of the front support main body 201 described above is, as shown in fig. 8 and 9, provided with two side plates 206 at both sides of the front support main body 201 in the width direction, respectively, each side extending from the top of the front support main body 201 to the middle-lower portion. And a bottom plate 210 is connected between the bottoms of the two side plates 206, and an installation space is defined between the two side plates 206 and the bottom plate 210.

In addition, when the front support 2 is in the retracted position, that is, when the front support body 201 is not turned outward with respect to the support frame 1, the bottom plate 210 is inserted into the limit groove 105 and abuts against the inner wall of the limit groove 105. The side plates 206 may abut against both sides of the support frame 1 in the stowed position to further improve the stability of the front support 2 in use in the stowed position.

In this embodiment, the top of the front support main body 201 is provided with a mounting protrusion 215 between the two side plates 206, and the mounting protrusion 215 is provided with a pivot shaft mounting hole for the first pivot shaft 108 to pass through. The damping hinge mounting holes 205 are located on the outside of each side. Preceding support subject 201's simple structure in this embodiment, the structure shaping of being convenient for, and excellent in use effect.

The two ratchet parts are distributed at intervals along the width direction of the support framework 1 so as to improve the stability of the front support 2 during overturning adjustment. Structurally, as shown in fig. 8, the ratchet part is embodied as a ratchet plate 203 provided corresponding to each of the mounting bosses 215, and nine ratchet grooves are provided on a bottom surface of each ratchet plate 203. The ratchet plate 203 is simple in structure and convenient to machine and form. In addition, a through hole 209 is provided in the front support body 201 corresponding to a lower portion of each ratchet plate 203 to facilitate the installation of the above-described coupling boss 111.

As shown in fig. 5, the elastic member is specifically two tension springs 211, the two tension springs 211 are respectively disposed on two sides of the middle plate 106, one end of each tension spring 211 is hooked on the middle plate 106, and the other end is hooked on the ratchet plate 203. The tension spring 211 has a simple structure and is convenient to arrange on the ratchet plate 203 and the support framework 1. When the front supporting main body 201 is turned outwards, each tension spring 211 is tensioned to store energy, so that the front supporting main body 201 can return conveniently.

An exemplary configuration of the engaging portion and the swing arm 204 in the present embodiment is shown in fig. 10, in which the engaging portion is pivotally provided on the support frame 1. Specifically, the engaging portion uses an engaging plate 102, one end of the engaging plate 102 is fitted over the second pivot shaft 107, and the upper surface of the other end is provided with three engaging teeth. The engaging plate 102 in this embodiment has a simple structure, and is easily arranged and implemented on the supporting frame 1.

As shown in fig. 10, the protrusion is embodied as a protrusion 104 provided on the outer side surface of each engagement plate 102. And the matching surface of the protruding block 104 and the protruding block 207 is an inclined surface. Specifically, the distance between the inclined surface of the projection 207 and the bottom surface of the engaging plate 102 is gradually reduced in the direction away from the second pivot shaft 107. So configured, the engagement projection 207 is facilitated to unlock the ratchet plate 203 from the engagement plate 102.

In addition, a torsion spring 103 supported between the supporting frame 1 and each of the engaging plates 102 is fitted over the second pivot shaft 107, and the torsion spring 103 is configured to drive the engaging plates 102 to have an engaging movement of the engaging ratchet plate 203. In the present embodiment, the torsion spring 103 may adopt a structure mature in the prior art, as shown in fig. 10, a middle portion of the torsion spring 103 abuts against a bottom portion of the engaging plate 102, and two ends of the torsion spring 103 abut against the connecting protrusions 111, respectively. Of course, the torsion spring 103 in the present embodiment may adopt other existing torsion springs 103 besides the structural form shown in the drawings, as long as the upward elastic urging force can be applied to the engaging plate 102.

Referring to fig. 10, the swing arm 204 in this embodiment is substantially fan-shaped, and is pivotally disposed on the ratchet plate 203 at the top of the swing arm 204 via a third pivot shaft disposed inside the swing arm 204, and is disposed at the first limiting block 212 at a free end of the third pivot shaft, and after the third pivot shaft passes through the ratchet plate 203, the third pivot shaft is limited by the first limiting block 212 abutting against the inside of the ratchet plate 203. The projection 207 is provided at the bottom of the swing arm 204 and faces the projection block 104 so as to be in contact with the projection block 104.

In order to improve the using effect of the first pushing portion, in this embodiment, a pushing fit portion is disposed on the pivot path of the first pushing portion, the pushing fit portion is fixedly connected to the swing arm 204, and the pushing fit portion can be pushed by the first pushing portion. The specific structure is shown in fig. 8 and 10. The first pushing portion in this embodiment is an arc-shaped through hole 208 formed on the ratchet plate 203, and the pushing engagement portion is fixed on one side of the swing arm 204 and extends to be retained in the arc-shaped through hole 208. When the ratchet plate 203 pivots with the front support 2 from the stowed position to the deployed position, the push fit portion transitions from one end of the arc-shaped through hole 208 to the other end of the arc.

In detail, the push-fit portion in this embodiment is specifically a push protrusion 216 disposed on the inner side of the swing arm 204. A second stopper 213 is provided at a free end of the push protrusion 216, and the second stopper 213 passes through the arc-shaped through hole 208 to maintain a clearance fit with the side surface of the ratchet plate 203.

In this embodiment, the second limiting block 213 is disposed to effectively prevent the pushing protrusion 216 from being disengaged from the arc-shaped through hole 208. In order to ensure the clearance fit between the swing arm 204 and the ratchet plate 203, a plurality of strip-shaped protrusions are further arranged on the inner side of the swing arm 204. The strip-like projection remains in abutment with the ratchet plate 203 when the swing arm 204 is pivoted relative to the ratchet plate 203. So set up, do benefit to and reduce the area of contact between swing arm 204 and the ratchet plate 203, and then do benefit to the fluency that improves swing arm 204 in rotating. Here, the arc-shaped through hole 208, the pushing protrusion 216, the second limiting block 213 and the strip-shaped protrusion have simple structures, are convenient to design and implement, and have good use effects.

For convenience of description hereinafter, in the present embodiment, one end of the arc-shaped through hole 208 near the front support main body 201 is referred to as a first end, and the other end of the arc-shaped through hole 208 is referred to as a second end. With reference to the perspective shown in fig. 12, when the front support 2 is in the stowed position, the three engagement teeth on the engagement plate 102 engage in the three leftmost ratchet grooves of the ratchet plate 203. At this time, the pushing projection 216 on the swing arm 204 is located at the first end of the arc-shaped through hole 208 due to its own weight. The torsion spring 103 applies a pushing force to the engagement plate 102 to engage the engagement teeth in the ratchet grooves.

Referring to fig. 11 and 12, when the front support main body 201 is outwardly turned, the engagement plate 102 disengages the engagement teeth and the ratchet grooves due to the depression of the ratchet teeth on the ratchet plate 203, and at this time, the torsion spring 103 is compressed and charged. When the front support body 201 is turned to a proper position, the energy storage is released by the torsion spring 103 to enable the meshing teeth to be meshed in the ratchet grooves and locked.

When the front support body 201 is turned to the state shown in fig. 13, at this time, the front support body 201 is turned to the outermost deployed position, and the three engagement teeth on the engagement plate 102 are engaged in the three ratchet grooves on the rightmost side, respectively. The pushing protrusion 216 on the swing arm 204 is located at the second end of the arc-shaped through hole 208 due to the turning of the ratchet plate 203, that is, the pushing protrusion 216 is transited from the first end to the second end, which is realized by turning the front support main body 201.

When the front support main body 201 in the unfolded position needs to be returned, as shown in fig. 14, the front support main body 201 is continuously turned outwards, and the swing arm 204 can be driven to rotate by the abutting between the second end and the pushing protrusion 216. At this time, the protrusion 207 abuts against the inclined surface of the protrusion 104, and simultaneously, the engaging plate 102 is pressed down by the inclined surface, and the engaging teeth are disengaged from the ratchet grooves, so that the locking between the ratchet plate 203 and the engaging plate 102 is released, and the torsion spring 103 is charged with energy.

Because the ratchet plate 203 and the engaging plate 102 are unlocked, the front support main body 201 can be smoothly reversed to return under the action of the tension spring 211. During the process of returning the front support body 201 to the retracted position, the downward pressure of the projection 207 on the protrusion block 104 is reduced, and the energy storage of the torsion spring 103 is released until the front support body 201 returns to the retracted position shown in fig. 12.

It should be noted that, in the present embodiment, the number of the ratchet grooves on the ratchet plate 203 and the number of the engaging teeth on the engaging plate 102 can be increased or decreased according to specific use requirements. The number of the ratchet plate 203 and the engaging plate 102 may be two, or only one, but the effect is not as good as that of two in the use stability.

The supporting framework 1 in the embodiment is inserted on the two headrest rods 101 in a sliding and adjustable manner, so that the height of the supporting framework 1 can be conveniently adjusted, and the supporting framework has better use flexibility. As shown in fig. 15 to 17, in the present embodiment, mounting holes are provided on both sides of the support frame 1, respectively, and a mounting seat 110 is mounted in each mounting hole. Each headrest rod 101 is mounted on the mount 110 and slides with respect to the mount 110. A plurality of slots 109 are distributed in the axial direction of the headrest rod 101, and an unlocking mechanism is arranged on the support frame 1.

The unlocking mechanism in the embodiment is used for locking and unlocking the support framework 1 which is adjusted in place. The unlocking mechanism comprises an unlocking body 3 and a clamp spring 305 assembled on the unlocking body 3. As shown in fig. 15 and 16, the unlocking body 3 in the present embodiment is held on the support frame 1 slidably in the axial direction perpendicular to the headrest rods 101. The unlocking main body 3 is in a strip plate shape, and is simple in structure and convenient to install and operate.

Referring to fig. 7, a mounting groove 112 is provided on the support frame 1 corresponding to the unlocking body 3, the mounting groove 112 being provided at the other side of the support frame 1 with respect to the front support body 201, that is, the unlocking body 3 is located at the rear of the support frame 1. The mounting grooves 112 specifically include side mounting grooves 112 located on two sides of the support frame 1, and further include a middle mounting groove located at the bottom of the middle plate 106. Here, the setting of side mounting groove and middle mounting groove does benefit to the stability that improves unblock main part 3 when using. For convenience of description, an end of the unlocking body 3 that receives the operation is referred to as an operation end in the present embodiment.

In this embodiment, the unlocking main body 3 is provided with a second pushing portion. The snap spring 305 is arranged around the circumference of the headrest rod 101 so as to be selectively snapped into the snap groove 109 in a natural state. As shown in fig. 17 and 18, the circlips 305 in this embodiment are two that are respectively sleeved outside the headrest rods 101. One end of the snap spring 305 is fixedly connected to the unlocking main body 3, and the free end of the snap spring 305 extends to be arranged on the sliding path of the second pushing part.

When the unlocking main body 3 is operated to enable the unlocking main body 3 to drive the second pushing portion to slide, the second pushing portion pushes the free end of the snap spring 305, so that the snap spring 305 expands to be separated from the clamping groove 109 in a clamping mode. For convenience of description, in the present embodiment, an end of the circlip 305 connected to the unlocking body 3 is referred to as a fixed end 306, and a free end of the circlip 305 is referred to as a pushing end 307.

Preferably, the second pushing portion in the present embodiment is embodied as a strip-shaped through hole 301 provided on the unlocking body 3. The pushing end 307 of each clamp spring 305 is inserted into the corresponding strip-shaped through hole 301. To improve the sensitivity of the unlocking body 3, the pushing ends 307 abut against the end of the strip-shaped through hole 301 close to the operating end. So set up, when the operation end bears the pressure operating force, the one end that unblock main part 3 passes through bar through-hole 301 promotes catch 307, makes jump ring 305 expand to the position that the dotted line corresponds in fig. 18, and at this moment, can slide support skeleton 1 from top to bottom to the position of supporting skeleton 1 is adjusted.

With continued reference to fig. 17, in the present embodiment, a strip-shaped through hole 301 is located at the other end of the unlocking main body 3 relative to the operation end and is disposed through the end, so that the space occupancy rate can be increased as much as possible on the premise of meeting the use requirement.

In order to facilitate unlocking, the snap spring 305 is disengaged from the snap groove 109 and then smoothly clamped into the next snap groove 109. The top of the card slot 109 in this embodiment has an obliquely arranged guiding surface. The latch spring 305 released from one of the latch grooves 109 can smoothly slide out of the latch groove 109 under the guidance of the guide surface, and thus slide into the next latch groove 109. Here, the guide face is simple in structure and good in guide effect.

In the present embodiment, as shown in fig. 7 and 17, a first protrusion 113 is provided at the bottom of the middle plate 106, and a second protrusion 303 extending toward the support frame 1 is provided at the middle of the unlocking body 3 corresponding to the first protrusion 113. A first spring 304 is connected between the first protrusion 113 and the second protrusion 303. The first spring 304 can compress the stored energy when the unlocking main body 3 is operated by external force to push the pushing end 307, and drives the unlocking main body 3 to return by releasing the stored energy after the external force disappears.

In addition, in order to facilitate the operation of the unlocking body 3, as shown in fig. 17, a button 302 is attached to the operation end of the unlocking body 3. The operating end of the unlocking main body 3 is provided with a mounting block 308, the button 302 is arranged on the mounting block 308 in a sliding way, and a second spring is connected between the mounting block 308 and the button 302. The second spring can compress when the button 302 is pressed and release the stored energy when the button 302 is released from being pressed and drive the button 302 back.

When the unlocking main body 3 in the embodiment is used, the button 302 is pressed first, the unlocking main body 3 slides due to the pressing force of the button 302, and the pushing end 307 is pushed by one end of the strip-shaped through hole 301, so that the clamp spring 305 expands and is pulled out from the clamping groove 109; then, the support frame 1 is slid, and at this time, under the action of the first spring 304, the unlocking main body 3 is reset, the snap spring 305 is clamped in the corresponding clamping groove 109, and the button 302 is also reset. When the height of the supporting framework 1 is adjusted, only the button 302 is pressed, and the adjusting mode is simple and good in effect.

Further, the headrest for a vehicle seat in the present embodiment further includes a housing 5 that covers the support frame 1. The shape of the housing 5 can be referred to here in the prior art as it takes the shape shown in fig. 19 and 20. The housing 5 includes a rear housing 502 covering the rear portion of the supporting frame 1, and a front housing 501 covering the front portion of the supporting frame 1 and fixedly connected to the rear housing 502.

The front housing 501 is hollow in the middle to facilitate connection between the support frame 1 and the front support 2. The button 302 is specifically mounted on one side of the rear case 502 so as to enhance the aesthetic appearance of the entire case 5 and also to facilitate the operation.

As shown in fig. 21, the headrest of the vehicle seat in the embodiment further includes a headrest cover 4 covering the front support 2, and the headrest cover 4 includes a foam 402 disposed on the front support 2, and a cover 401 covering the foam 402 and the front support 2. Wherein, the rear parts of the sleeve body 401 and the foaming body 402 are also arranged in a hollow way so as to facilitate the connection between the supporting framework 1 and the front support 2.

In addition, the supporting frame 1, the front support 2 and the housing 5 in this embodiment can be made of plastic. So do benefit to the lightweight design of vehicle to do benefit to the manufacturing cost who reduces vehicle seat headrest.

The vehicle seat headrest of the embodiment can lock the front support 2 which is turned in place through the matching between the ratchet part and the meshing part, and has better locking stability; and the projection on the engaging part is engaged with the projection 207 on the swing arm 204, so that the engaging part can be pressed down to release the lock between the ratchet part and the engaging part, and at this time, the front support 2 can be returned only by reversely turning the front support 2, thereby improving the stability and convenience of the headrest for the vehicle seat at the time of the turning adjustment.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A vehicle seat headrest comprises a support framework (1) connected with a headrest rod (101) and a front support (2); the front support (2) is pivoted on the support frame (1) to be operable to pivot between a stowed position and a deployed position, and is characterized by further comprising a ratchet part, an engagement part, a swing arm (204) and an elastic part, wherein:

the ratchet part is fixedly arranged on the front support (2) so as to follow the pivoting of the front support (2), and a first pushing part is arranged on the ratchet part;

the meshing part is pivoted on the support framework (1), has meshing movement for meshing the ratchet part under the driving of elastic force, and is fixed with a protruding part;

the ratchet part is pivoted along with the front support (2) from the retracted position to the deployed position in a single direction under the meshed state of the ratchet part and the meshing part;

the swing arm (204) is pivoted on the ratchet part, and a lug (207) is arranged on the swing arm (204);

when the ratchet part pivots from the retracted position to the deployed position, the first pushing part contacts the swing arm (204), and when the front support (2) continues to move, the first pushing part pushes the swing arm (204) to swing, so that the lug (207) contacts and presses down the protrusion part;

the elastic piece is connected between the front support (2) and the support framework (1), and when the front support (2) is pivoted from the retracted position to the deployed position, the elastic piece elastically stores energy.

2. The vehicle seat headrest according to claim 1, characterized in that:

a push matching part is arranged on a pivoting path of the first push part;

the push fit portion is fixedly connected to the swing arm (204), and the push fit portion can be pushed by the first push portion.

3. The vehicle seat headrest according to claim 2, characterized in that:

the first pushing part is an arc-shaped through hole (208) formed on the ratchet part, and the pushing matching part is fixed on one side of the swing arm (204) and extends to be kept in the arc-shaped through hole (208);

when the ratchet part pivots from the retracted position to the deployed position along with the front support (2), the push fit part is transited from one arc-shaped end of the arc-shaped through hole (208) to the other arc-shaped end.

4. The vehicle seat headrest according to claim 3, characterized in that:

the free end of the push fit part is provided with a limiting block;

the limiting block passes through the arc-shaped through hole (208) to keep clearance fit with the side face of the ratchet part.

5. The vehicle seat headrest according to claim 1, characterized in that:

the engaging part is pivoted on the supporting framework (1) through a pivot shaft;

the pivoting shaft is sleeved with a torsion spring (103) supported between the supporting framework (1) and the meshing part;

the torsion spring (103) is used for driving the meshing part to have meshing movement for meshing the ratchet part.

6. The vehicle seat headrest according to claim 1, characterized in that:

the ratchet parts are two in interval distribution along the width direction of the support framework (1).

7. The vehicle seat headrest according to any one of claims 1 to 6, characterized in that:

the front support (2) comprises a front support body (201) and two ear flap portions, wherein:

the front support main body (201) is pivoted on the support framework (1);

the two ear wing parts are respectively connected with two sides of the front support main body (201) through damping hinges (214).

8. The vehicle seat headrest according to claim 7, characterized in that:

the torque of the earflap portion relative to the damping hinge (214) when the front support body (201) is folded forward is smaller than the torque of the earflap portion relative to the damping hinge (214) when the front support body (201) is folded backward.

9. The vehicle seat headrest according to any one of claims 1 to 6, characterized in that:

the supporting framework (1) is inserted on the two headrest rods (101) in a sliding and adjustable manner.

10. The vehicle seat headrest according to claim 9, characterized in that:

a plurality of clamping grooves (109) are distributed in the axial direction of the headrest rod (101), and an unlocking mechanism is arranged on the support framework (1);

the unlocking mechanism comprises an unlocking body (3) and a clamp spring (305) assembled on the unlocking body (3);

the unlocking main body (3) is kept on the supporting framework (1) in a sliding mode along an axial direction perpendicular to the headrest rod (101), and a second pushing portion is arranged on the unlocking main body (3);

the clamp spring (305) is arranged around the periphery of the headrest rod (101) so as to be clamped into the clamping groove (109) in a natural state, one end of the clamp spring (305) is fixedly connected to the unlocking main body (3), and the free end of the clamp spring (305) extends to be arranged on a sliding path of the second pushing part;

the operation the unblock main part (3) and make unblock main part (3) drive when second promotion portion slides, second promotion portion promotes the free end of jump ring (305), so that jump ring (305) expand and with draw-in groove (109) break away from the joint.

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