CN117962723A - Seat headrest capable of being adjusted in four directions and automobile - Google Patents

Abstract

The invention provides a seat headrest capable of being adjusted in four directions and an automobile, and relates to the technical field of seat headrest equipment. The seat headrest capable of being adjusted in four directions comprises a headrest rod, a headrest front cover, a headrest rear cover, a linkage adjusting component and a trigger piece; the headrest front cover and the headrest rear cover are connected with each other, the linkage adjusting component is arranged in the movable cavity, and one end of the headrest rod is inserted into the movable cavity; the linkage adjusting assembly comprises a linkage base, an upper unlocking piece, a lower unlocking piece, a front unlocking piece and a rear unlocking piece, wherein the upper unlocking piece, the lower unlocking piece, the front unlocking piece, the rear unlocking piece and the front unlocking piece are both arranged on the linkage base, the linkage base is slidably arranged on a headrest rod, a front sliding rod and a rear sliding rod are arranged in a movable cavity, and the linkage base is slidably arranged on the front sliding rod and the rear sliding rod; the trigger piece includes trigger push rod and trigger button, and trigger button installs behind the headrest and covers, and trigger push rod inserts and establishes in the trigger piece to be provided with the trigger driving piece that is used for the synchronous drive to go up and down the unblock piece and preceding back unblock piece on the trigger push rod. The technical effect of four-way simultaneous adjustment is achieved.

Description

Seat headrest capable of being adjusted in four directions and automobile

Technical Field

The invention relates to the technical field of seat headrest equipment, in particular to a seat headrest capable of being adjusted in four directions and an automobile.

Background

With the development of the age, the requirements of people on automobiles are higher and higher, the seat headrest plays an increasingly important role, and the common fixed headrest and the up-and-down adjusting headrest are not capable of meeting the market demands. In order to cope with different sizes and postures of different passengers, besides the up-and-down adjustment, the front-and-back position needs to be adjustable, so that the headrest is always in a more comfortable position, the support is better provided for the head of the passenger, the riding fatigue is relieved, and the head and the neck of the passenger are protected.

The four-way regulation headrest on the market is not perfect in many aspects, especially in the regulation process, the headrest of the existing product can not realize four-way regulation simultaneously, and the regulation needs to be distributed.

Disclosure of Invention

The invention aims to provide a seat headrest capable of being adjusted in four directions and an automobile, so as to solve the technical problem that the seat headrest cannot be adjusted in four directions simultaneously in the prior art.

In a first aspect, an embodiment of the present invention provides a four-way adjustable seat headrest, including a headrest rod, a headrest front cover, a headrest rear cover, a linkage adjustment assembly, and a trigger;

The headrest front cover and the headrest rear cover are connected with each other to form a movable cavity, the linkage adjusting component is arranged in the movable cavity, and one end of the headrest rod is inserted into the movable cavity;

The linkage adjusting assembly comprises a linkage base, an upper unlocking piece, a lower unlocking piece, a front unlocking piece, a rear unlocking piece, a back unlocking piece, a headrest rod and a movable cavity, wherein the upper unlocking piece, the lower unlocking piece, the front unlocking piece, the rear unlocking piece and the front unlocking piece are both arranged on the linkage base;

The trigger piece includes trigger push rod and trigger button, trigger button installs behind the headrest cover, trigger push rod inserts and establishes in the trigger piece, and be provided with on the trigger push rod and be used for synchronous drive upper and lower unblock piece with the trigger drive piece of front and back unblock piece.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a trigger guide groove is formed on the linkage base, and the trigger push rod is slidably disposed in the trigger guide groove.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the upper and lower unlocking pieces include a torsion spring unlocking rod, and one end of the headrest rod is provided with a plurality of locking grooves adapted to the torsion spring unlocking rod;

The trigger push rod is provided with a pushing part which is in butt joint with the torsion spring unlocking rod.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the trigger push rod is provided with a pushing groove, and the pushing groove forms the pushing portion.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the torsion spring unlocking lever includes a transverse mounting lever, a vertical connecting lever and a transverse locking lever, a mounting seat for mounting the transverse mounting lever is provided at a top of the linkage base, and a locking transverse hole for passing through the transverse locking lever is provided on a side wall of the linkage base.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein an upper guiding chute and a lower guiding chute are provided on the linkage base, and an end portion of the headrest rod is pivoted in the upper guiding chute and the lower guiding chute through a pin shaft.

With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, where the front and rear unlocking pieces include an unlocking sliding tooth, a floating unlocking seat and a floating seat return spring;

the two ends of the unlocking sliding teeth are respectively and fixedly arranged on the headrest front cover and the headrest rear cover, and the two ends of the front sliding rod and the rear sliding rod are respectively and fixedly arranged on the headrest front cover and the headrest rear cover;

The unlocking sliding teeth penetrate through the linkage base and the floating unlocking seat, a stop lever which can be matched with the unlocking sliding teeth is arranged on the floating unlocking seat, and the tooth surface of the unlocking sliding teeth is opposite to the stop lever;

The linkage base is provided with a floating groove, and the floating unlocking seat is slidably arranged in the floating groove;

The floating unlocking seat is provided with an inclined pedestal, and the trigger push rod is provided with an inclined pedestal convex block matched with the inclined pedestal, so that the floating unlocking seat can be driven to move downwards when the trigger push rod translates;

the inclined table lug triggers the inclined table seat and the pushing part can pull the torsion spring unlocking rod at the same time so as to synchronously unlock the upper unlocking piece, the lower unlocking piece and the front unlocking piece and the rear unlocking piece;

the floating seat return spring is arranged between the linkage base and the floating unlocking seat, and the compression direction of the floating seat return spring is consistent with the moving direction of the floating unlocking seat.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the floating groove includes a main groove body and a plurality of stabilizing grooves, and a plurality of stabilizing claws are disposed around the floating unlocking seat, and the stabilizing claws are slidably disposed in the stabilizing grooves.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the linkage base is located in the floating groove and is provided with an anti-falling slot hole, one side of the floating unlocking seat is provided with an anti-falling sliding plate adapted to the anti-falling slot hole, and the anti-falling sliding plate is in an L shape.

In a second aspect, embodiments of the present invention provide an automobile including the four-way adjustable seat headrest.

The beneficial effects are that:

The invention provides a seat headrest capable of being adjusted in four directions, which comprises a headrest rod, a headrest front cover, a headrest rear cover, a linkage adjusting component and a trigger piece, wherein the trigger piece is arranged on the headrest rod; the headrest front cover and the headrest rear cover are connected with each other to form a movable cavity, the linkage adjusting component is arranged in the movable cavity, and one end of the headrest rod is inserted into the movable cavity; the linkage adjusting assembly comprises a linkage base, an upper unlocking piece, a lower unlocking piece, a front unlocking piece and a rear unlocking piece, wherein the upper unlocking piece, the lower unlocking piece, the front unlocking piece, the rear unlocking piece and the front unlocking piece are both arranged on the linkage base, the linkage base is slidably arranged on a headrest rod, a front sliding rod and a rear sliding rod are arranged in a movable cavity, and the linkage base is slidably arranged on the front sliding rod and the rear sliding rod; the trigger piece includes trigger push rod and trigger button, and trigger button installs behind the headrest and covers, and trigger push rod inserts and establishes in the trigger piece to be provided with the trigger driving piece that is used for the synchronous drive to go up and down the unblock piece and preceding back unblock piece on the trigger push rod.

Specifically, when the user needs to adjust the seat headrest, the user presses the trigger button on the headrest back cover, the trigger button can promote the trigger push rod and remove, and when the trigger push rod removed, the trigger driving piece on the trigger push rod can unlock simultaneously and go up and down unlock piece and front and back unlock piece to the user can operate the headrest and make its inside linkage base can reciprocate along the headrest pole, and the linkage base can reciprocate along the front and back slide bar simultaneously, and the user can adjust the adjustment of four directions about the seat headrest simultaneously.

The invention provides an automobile, which comprises a seat headrest capable of being adjusted in four directions. The automobile has the above advantages over the prior art and will not be described here again.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a four-way adjustable seat headrest provided in an embodiment of the present invention;

Fig. 2 is a schematic structural view of a linkage adjustment assembly in a four-way adjustable headrest of a seat according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a four-way adjustable seat headrest at a front and rear unlocking member of a linkage adjustment assembly according to an embodiment of the present invention;

Fig. 4 is a schematic structural view of a linkage base in a four-way adjustable headrest of a seat according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an up-down unlocking member of a seat headrest capable of being adjusted in four directions according to an embodiment of the invention;

FIG. 6 is a schematic view of a floating unlocking seat in a four-way adjustable seat headrest according to an embodiment of the present invention;

FIG. 7 is an oblique view of a floating unlocking seat in a four-way adjustable seat headrest provided by an embodiment of the present invention;

FIG. 8 is an exploded view of a trigger button in a four-way adjustable seat headrest according to an embodiment of the present invention;

fig. 9 is a schematic diagram of unlocking sliding teeth in a four-way adjustable seat headrest according to an embodiment of the invention.

Icon:

100-headrest rods; 110-locking grooves; 120-pin shafts;

210-headrest front cover; 220-a headrest rear cover; 230-an active cavity; 231-front and rear slide bars;

300-linkage adjustment assembly; 310-linkage base; 311-triggering a guide groove; 312-mounting base; 313-locking cross holes; 314-upper and lower guide runners; 315-floating tank; 3151—a main tank; 316-stabilizing tank; 317-anti-drop slots; 320-up and down unlocking pieces; 321-torsion spring unlocking lever; 3211-transversely mounting a rod; 3212-vertical tie bars; 3213-transverse locking bar; 330-front and rear unlocking members; 331-unlocking the sliding teeth; 332-floating unlocking seat; 333—floating mount return spring; 334-stop lever; 335-a ramp; 336-stabilizing claws; 337-anti-falling slide plate;

400-triggering piece; 410-triggering a push rod; 411-push slot; 412-ramp bumps; 413—a push rod return spring; 420-trigger button; 421-button mount; 422-button springs; 423-push button push rod cover.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The invention will now be described in further detail with reference to specific examples thereof in connection with the accompanying drawings.

Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, the present embodiment provides a four-way adjustable seat headrest, including a headrest rod 100, a headrest front cover 210, a headrest rear cover 220, a linkage adjustment assembly 300 and a trigger 400; the headrest front cover 210 and the headrest rear cover 220 are connected with each other and form a movable cavity 230, the linkage adjustment assembly 300 is arranged in the movable cavity 230, and one end of the headrest rod 100 is inserted in the movable cavity 230; the linkage adjusting assembly 300 comprises a linkage base 310, an upper unlocking piece 320, a lower unlocking piece 320 and a front unlocking piece 330, wherein the upper unlocking piece 320, the lower unlocking piece 320, the front unlocking piece 330, the rear unlocking piece 330 are both arranged on the linkage base 310, the linkage base 310 is slidably arranged on the headrest rod 100, a front sliding rod 231 and a rear sliding rod 231 are arranged in the movable cavity 230, and the linkage base 310 is slidably arranged on the front sliding rod 231 and the rear sliding rod 231; the trigger 400 includes a trigger push rod 410 and a trigger button 420, the trigger button 420 is installed on the headrest rear cover 220, the trigger push rod 410 is inserted into the trigger 400, and a trigger driving member for synchronously driving the up-down unlocking member 320 and the front-rear unlocking member 330 is provided on the trigger push rod 410.

Specifically, when the user needs to adjust the headrest, the user presses the trigger button 420 on the headrest rear cover 220, the trigger button 420 can push the trigger push rod 410 to move, and when the trigger push rod 410 moves, the trigger driving piece on the trigger push rod 410 can unlock the up-down unlocking piece 320 and the front-back unlocking piece 330 simultaneously, so that the user can operate the headrest to enable the linkage base 310 in the headrest to move up and down along the headrest rod 100, and meanwhile, the linkage base 310 can move back and forth along the front-back sliding rod 231, and the user can adjust the adjustment in the up-down, left-right directions of the headrest.

Wherein, a push rod return spring 413 is provided between the trigger push rod 410 and the linkage base 310.

Wherein the trigger driving member includes a ramp protrusion 412 and a push slot 411.

Referring to fig. 1 to 9, in an alternative embodiment of the present invention, a trigger guide slot 311 is formed on the linkage base 310, and a trigger push rod 410 is slidably disposed in the trigger guide slot 311.

Specifically, the trigger guide slot 311 is formed on the linkage base 310, and the trigger push rod 410 can be slidably disposed in the trigger guide slot 311, so that when the user presses the trigger button 420, the trigger button 420 can push the trigger push rod 410 to move in the trigger guide slot 311.

Wherein, the trigger button 420 includes a button seat 421, a button spring 422 and a button push rod cover 423, the button seat 421 is fixedly disposed on the headrest rear cover 220, one end of the button spring 422 is abutted in the button seat 421, the other end is abutted with the button push rod cover 423, and the button spring 422 is sleeved on the button push rod of the button push rod cover 423, when the button push rod cover 423 is pressed by a user, the button push rod of the button push rod cover 423 can penetrate out from the button seat 421 and is abutted with the trigger push rod 410, so that the button push rod can push the trigger push rod 410 to move.

Referring to fig. 1 to 9, in an alternative scheme of the present embodiment, the up-down unlocking member 320 includes a torsion spring unlocking rod 321, and one end of the headrest rod 100 is provided with a plurality of locking grooves 110 adapted to the torsion spring unlocking rod 321; the trigger push rod 410 has a pushing portion that abuts against the torsion spring lock release lever 321.

Wherein, the trigger push rod 410 is provided with a pushing slot 411, and the pushing slot 411 forms a pushing part.

Specifically, the torsion spring unlocking lever 321 is mounted on the linkage base 310, and in the initial state, the torsion spring unlocking lever 321 can be engaged with the locking groove 110 on the headrest rod 100, so that the headrest rod 100 cannot move relative to the linkage base 310. When the user pushes the trigger push rod 410 through the trigger button 420, the trigger push rod 410 can be abutted against the torsion spring unlocking rod 321 and drive the torsion spring unlocking rod 321 to be separated from the locking groove 110 of the headrest rod 100, so that the headrest rod 100 can move relative to the linkage base 310.

The headrest rod 100 is provided with a plurality of locking grooves 110, and the locking grooves 110 can be distributed at equal intervals.

Referring to fig. 1-9, in an alternative scheme of the present embodiment, a torsion spring unlocking lever 321 includes a transverse mounting lever 3211, a vertical connecting lever 3212 and a transverse locking lever 3213, a mounting seat 312 for mounting the transverse mounting lever 3211 is provided at the top of the linkage base 310, and a locking transverse hole 313 through which the transverse locking lever 3213 passes is provided on a side wall of the linkage base 310.

Specifically, the torsion spring unlocking rod 321 includes three parts of a transverse installation rod 3211, a vertical connecting rod 3212 and a transverse locking rod 3213, the three parts of the transverse installation rod 3211, the vertical connecting rod 3212 and the transverse locking rod 3213 are of an integrated structure, and a certain torsion force is provided among the three parts of the transverse installation rod 3211, the vertical connecting rod 3212 and the transverse locking rod 3213, so that when the trigger push rod 410 does not push the transverse locking rod 3213 to move, elastic potential energy between the transverse locking rod 3213 and the vertical connecting rod 3212 can keep the transverse locking rod 3213 to be clamped with the locking groove 110 of the headrest rod 100.

Wherein, the pushing slot 411 on the trigger push rod 410 can drive the lateral locking rod 3213 to move, thereby unlocking the lateral locking rod 3213 and the locking slot 110 on the headrest rod 100.

Referring to fig. 1 to 9, in an alternative embodiment of the present embodiment, an upper and lower guide chute 314 is formed on the linkage base 310, and the end of the headrest rod 100 is pivotally connected to the upper and lower guide chute 314 through a pin 120.

Specifically, the pin 120 can slide in the upper and lower guide sliding grooves 314, thereby restricting the sliding adjustment range of the headrest rod 100.

Referring to fig. 1 to 9, in the alternative of the present embodiment, the front and rear unlocking member 330 includes an unlocking slide tooth 331, a floating unlocking seat 332, and a floating seat return spring 333; the two ends of the unlocking slide tooth 331 are respectively and fixedly arranged on the headrest front cover 210 and the headrest rear cover 220, and the two ends of the front and rear slide bar 231 are respectively and fixedly arranged on the headrest front cover 210 and the headrest rear cover 220; the unlocking sliding teeth 331 penetrate through the linkage base 310 and the floating unlocking seat 332, a stop lever 334 which can be matched with the unlocking sliding teeth 331 is arranged on the floating unlocking seat 332, and the tooth surface of the unlocking sliding teeth 331 is opposite to the stop lever 334; the linkage base 310 is provided with a floating groove 315, and the floating unlocking seat 332 is slidably arranged in the floating groove 315; the floating unlocking seat 332 is provided with a sloping seat 335, and the trigger push rod 410 is provided with a sloping seat lug 412 which is matched with the sloping seat 335, so that the floating unlocking seat 332 can be driven to move downwards when the trigger push rod 410 translates; the ramp bump 412 triggers the ramp block 335 while the pushing part can pull the torsion spring unlocking lever 321 to unlock the up-down unlocking piece 320 and the front-rear unlocking piece 330 synchronously; the floating seat return spring 333 is provided between the linked base 310 and the floating unlocking seat 332, and the compression direction of the floating seat return spring 333 coincides with the moving direction of the floating unlocking seat 332.

Specifically, when the user presses the trigger button 420 to push the trigger push rod 410, the ramp bump 412 on the trigger push rod 410 can abut against the ramp base 335 on the floating unlocking base 332, and the trigger push rod 410 slides in the trigger guide slot 311 and cannot move up and down, so that the ramp bump 412 drives the ramp base 335 to move up and down, in the scheme of the embodiment, the ramp base 335 moves down, so that the floating unlocking base 332 moves down with the ramp base 335, and the stop lever 334 on the floating unlocking base 332 moves down synchronously, so that the stop lever 334 is separated from the unlocking sliding tooth 331, at this time, the user can move the linkage base 310 back and forth, and when the user releases the trigger button 420, the stop lever 334 can rise and be locked with the unlocking sliding tooth 331.

Wherein, the floating seat return spring 333 is disposed between the linkage base 310 and the floating unlocking seat 332, when the floating unlocking seat 332 moves downward relative to the linkage base 310, the floating unlocking seat 332 presses the floating seat return spring 333, so when the user releases the trigger button 420, the floating seat return spring 333 can drive the floating unlocking seat 332 to rise, thereby locking the stop lever 334 with the unlocking slide teeth 331.

Wherein, the linkage base 310 is provided with a drop-proof slot 317 in the floating slot 315, one side of the floating unlocking seat 332 is provided with a drop-proof slide plate 337 adapted to the drop-proof slot 317, and the drop-proof slide plate 337 is L-shaped.

Referring to fig. 1-9, in an alternative embodiment, the floating groove 315 includes a main groove body 3151 and a plurality of stabilizing grooves 316, a plurality of stabilizing claws 336 are disposed around the floating unlocking seat 332, and the stabilizing claws 336 are slidably disposed in the stabilizing grooves 316.

Specifically, the floating groove 315 includes a main groove body 3151 and a plurality of stabilizing grooves 316, a plurality of stabilizing claws 336 are disposed around the floating unlocking seat 332, the floating unlocking seat 332 is slidably disposed in the main groove body 3151, and the plurality of stabilizing claws 336 are slidably disposed in the stabilizing grooves 316, so that the floating unlocking seat 332 is ensured to stably slide up and down, and stable separation and locking between the stop lever 334 and the unlocking sliding teeth 331 are ensured.

The embodiment provides an automobile comprising a seat headrest capable of being adjusted in four directions.

In particular, compared with the prior art, the automobile provided in this embodiment has the advantages of the seat headrest that can be adjusted in four directions, and will not be described in detail herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present invention.

Claims (10)

1. A four-way adjustable seat headrest, comprising: a headrest rod (100), a headrest front cover (210), a headrest rear cover (220), a linkage adjustment assembly (300) and a trigger piece (400);

The headrest front cover (210) and the headrest rear cover (220) are connected with each other and form a movable cavity (230), the linkage adjusting assembly (300) is arranged in the movable cavity (230), and one end of the headrest rod (100) is inserted into the movable cavity (230);

The linkage adjusting assembly (300) comprises a linkage base (310), an upper unlocking piece (320) and a lower unlocking piece (330), wherein the upper unlocking piece (320) and the lower unlocking piece (330) are both arranged on the linkage base (310), the linkage base (310) is slidably arranged on the headrest rod (100), a front sliding rod (231) and a rear sliding rod (231) are arranged in the movable cavity (230), and the linkage base (310) is slidably arranged on the front sliding rod and the rear sliding rod (231);

The trigger piece (400) comprises a trigger push rod (410) and a trigger button (420), the trigger button (420) is installed on the headrest rear cover (220), the trigger push rod (410) is inserted into the trigger piece (400), and a trigger driving piece for synchronously driving the upper unlocking piece (320) and the lower unlocking piece (330) and the front unlocking piece and the rear unlocking piece (330) is arranged on the trigger push rod (410).

2. The seat headrest according to claim 1, wherein the linkage base (310) is provided with a trigger guide groove (311), and the trigger push rod (410) is slidably disposed in the trigger guide groove (311).

3. The seat headrest capable of being adjusted in four directions according to claim 1, wherein the up-down unlocking piece (320) comprises a torsion spring unlocking rod (321), and a plurality of locking grooves (110) matched with the torsion spring unlocking rod (321) are formed at one end of the headrest rod (100);

the trigger push rod (410) is provided with a pushing part which is abutted with the torsion spring unlocking rod (321).

4. A four-way adjustable seat headrest according to claim 3, characterized in that the trigger push rod (410) is provided with a push slot (411), the push slot (411) forming the push portion.

5. The seat headrest capable of being adjusted in four directions according to claim 3, wherein the torsion spring unlocking rod (321) comprises a transverse mounting rod (3211), a vertical connecting rod (3212) and a transverse locking rod (3213), a mounting seat (312) for mounting the transverse mounting rod (3211) is arranged at the top of the linkage base (310), and a locking transverse hole (313) for the transverse locking rod (3213) to pass through is formed in the side wall of the linkage base (310).

6. The seat headrest capable of being adjusted in four directions according to claim 3, wherein an upper guide chute (314) and a lower guide chute (314) are formed on the linkage base (310), and the end part of the headrest rod (100) is pivoted in the upper guide chute (314) and the lower guide chute through a pin shaft (120).

7. A four-way adjustable seat headrest as claimed in claim 3 wherein the front and rear unlocking members (330) comprise unlocking slide teeth (331), a floating unlocking seat (332) and a floating seat return spring (333);

The two ends of the unlocking sliding teeth (331) are respectively and fixedly arranged on the headrest front cover (210) and the headrest rear cover (220), and the two ends of the front sliding rod (231) and the rear sliding rod (231) are respectively and fixedly arranged on the headrest front cover (210) and the headrest rear cover (220);

the unlocking sliding teeth (331) penetrate through the linkage base (310) and the floating unlocking seat (332), a stop lever (334) capable of being matched with the unlocking sliding teeth (331) is arranged on the floating unlocking seat (332), and the tooth surface of the unlocking sliding teeth (331) is opposite to the stop lever (334);

the linkage base (310) is provided with a floating groove (315), and the floating unlocking seat (332) is slidably arranged in the floating groove (315);

The floating unlocking seat (332) is provided with an inclined pedestal (335), and the trigger push rod (410) is provided with an inclined pedestal lug (412) matched with the inclined pedestal (335) so that the floating unlocking seat (332) can be driven to move downwards when the trigger push rod (410) translates;

the inclined table lug (412) triggers the inclined table seat (335) and the pushing part can pull the torsion spring unlocking rod (321) at the same time so as to synchronously unlock the upper unlocking piece (320) and the lower unlocking piece (330);

The floating seat return spring (333) is disposed between the linked base (310) and the floating unlocking seat (332), and a compression direction of the floating seat return spring (333) coincides with a movement direction of the floating unlocking seat (332).

8. The four-way adjustable seat headrest of claim 7, wherein the floating groove (315) comprises a main groove body (3151) and a plurality of stabilizing grooves (316), a plurality of stabilizing claws (336) are arranged around the floating unlocking seat (332), and the stabilizing claws (336) are slidably arranged in the stabilizing grooves (316).

9. The four-way adjustable seat headrest according to claim 8, wherein the linkage base (310) is provided with a drop-preventing slot hole (317) in the floating slot (315), one side of the floating unlocking seat (332) is provided with a drop-preventing slide plate (337) adapted to the drop-preventing slot hole (317), and the drop-preventing slide plate (337) is L-shaped.

10. An automobile comprising a four-way adjustable seat headrest according to any one of claims 1 to 9.