CN218257860U - Lifting headrest with back unlocking function - Google Patents

Abstract

The utility model provides a lifting headrest with an unlocked back surface, a headrest body is arranged on a seat through a headrest rod, and the height of the headrest body can be vertically adjusted on the headrest rod; the headrest rod is provided with a plurality of lock grooves, the seat headrest is also provided with an unlocking structure which can be connected with the lock grooves, and the unlocking structure comprises a pull rope, a guide wheel set for guiding the pull rope, a button connected with the pull rope, and a lock tongue which is fixedly connected with the pull rope, can be matched with the lock grooves and is connected with a first spring; the pull rope acts by pressing the button, and the pull rope pulls the lock tongue to move so as to be separated from the lock groove of the headrest rod; the button is released, and the lock tongue can be inserted into the lock groove of the headrest rod under the action of the first spring. The utility model discloses with the button setting at the back of headrest body, make the stay cord action through pressing/drawing the button outward, through stay cord pulling spring bolt action alright carry out the unblock to the headrest body, unblock convenient operation is particularly useful for unsuitable seat with the setting of release button at headrest body avris.

Description

Back unblock's lift headrest

Technical Field

The utility model belongs to the seat headrest field, concretely relates to lift headrest of back unblock.

Background

A seat headrest (hereinafter, referred to as a headrest) is generally provided on an upper portion of a seat back, and an occupant of the seat rests the headrest on the headrest to improve head comfort. In order to adapt to different requirements of different passengers on the height of the headrest, the headrest is generally made into a structure with adjustable height, specifically, the headrest is installed on an automobile seat through a headrest rod, and a body of the headrest can vertically move on the headrest rod so as to adjust the height of the headrest body. The height-adjustable headrest comprises a common headrest with the height manually adjusted manually and an electric headrest with a headrest body driven by a driving mechanism to move vertically, and the common headrest is low in price and is used in many automobiles.

In the prior art, the unlocking button of most common headrests is arranged on the side of a headrest body. However, in some headrests in which the release button cannot be provided on the headrest body side, the release button needs to be provided on the back surface of the headrest body. For example, the sound equipment is arranged in the headrest body, and occupies a position, so that the button is difficult to arrange on the side of the headrest body; for example, the space outside the headrest body is insufficient, and people cannot stretch hands to the side of the headrest body to press the button. In view of the above, it is necessary to design a back-unlocked seat headrest.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art, the utility model aims at providing a lift headrest of back unblock.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a lifting headrest with an unlocked back comprises a headrest rod and a headrest body, wherein the headrest body is arranged on a seat through the headrest rod, and the height of the headrest body can be vertically adjusted on the headrest rod; the headrest rod is provided with a plurality of locking grooves which are arranged at intervals along the height direction of the headrest rod, the lifting headrest is also provided with an unlocking structure which can be connected with the locking grooves, the unlocking structure comprises a pull rope, a guide wheel set for guiding the pull rope, a button connected with a first end of the pull rope and a lock tongue which is fixedly connected with a second end of the pull rope, can be matched with the locking grooves in an inserting mode and is connected with a first spring, the back of the headrest body is provided with an operation hole, and the button is installed in the operation hole; the pull rope acts by pressing/pulling the button outwards, the pull rope pulls the lock tongue to move so as to be separated from the lock groove of the headrest rod, and the button, the pull rope and the lock tongue can vertically move relative to the headrest rod along with the headrest body; the button is released, and the lock tongue can be inserted into the lock groove of the headrest rod under the action of the first spring.

Among the above-mentioned technical scheme, with the back of button setting at the headrest body, make the stay cord action through pressing/draw the button outward, through the stay cord pulling spring bolt action alright carry out unblock, unblock convenient operation to the headrest body. The utility model discloses a lift headrest is particularly useful for and is unsuitable to set up the seat of release button at headrest body avris.

In a preferred embodiment of the present invention, the first end of the pulling rope is fixedly connected to the headrest body, the pulling rope is directly or indirectly abutted against the pulling rope, and the button is pressed under the guiding action of the guiding wheel set, so that the pulling rope can be bent forward to pull the latch tongue to move and disengage from the lock groove of the headrest rod; or the first end of the pull rope is fixedly connected with the button, and the button is pressed/pulled outwards under the guiding action of the guide wheel set, so that the pull rope can be bent forwards/backwards to pull the lock tongue to act and be separated from the lock groove of the headrest rod.

Among the above-mentioned technical scheme, two kinds of schemes of button and stay cord butt, button and stay cord rigid coupling are provided, can select according to actual conditions.

The utility model discloses an in the preferred embodiment, when the first end of stay cord and headrest body rigid coupling, still install in the headrest body along the gliding sheave that has the draw-in groove of headrest body fore-and-aft direction, the front end of button and the rear end butt of sheave, during the draw-in groove of sheave front end is gone into to the stay cord card.

Among the above-mentioned technical scheme, the vertical position of stay cord is spacing through the sheave that sets up and button butt, and the sheave can be followed headrest body fore-and-aft direction and slided moreover, does not influence the stay cord and crooked forward and resume initial position.

The utility model discloses an among the preferred embodiment, the inside rigid coupling of headrest body has the grooved mount pad that has that is used for installing the sheave, and the top and the bottom of mount pad all have along the bar groove that the fore-and-aft direction extends, and the upper end of sheave and the equal rigid coupling of lower extreme have the first round pin axle of vertical setting, and the sheave is arranged in the recess and the first round pin axle at its both ends inserts two bar grooves respectively.

Among the above-mentioned technical scheme, the sheave can slide around in the mount pad through the first round pin axle and the bar groove at its both ends, and first round pin axle is movable in the bar groove, and when pressing the button, the sheave can rotate in order to reduce the frictional force with the stay cord.

In a preferred embodiment of the present invention, a second spring is disposed between the button and the headrest body, and both ends of the second spring are respectively connected to the button and the headrest body; and/or the pull cord is a flexible steel cord or rope.

Among the above-mentioned technical scheme, spring bolt and button set up independent first spring and second spring respectively, and the spring bolt resets under the effect of first spring, and the button resets under the effect of second spring, and the mutual noninterference that resets of spring bolt and button, the reliability is higher. The pull rope is a steel rope or a steel cable, so that the service life is long.

The utility model discloses an among another kind of preferred embodiment, the unblock structure still establishes on the headrest pole and can be on the headrest pole vertical gliding mechanism box body including the cover, headrest body and mechanism box body fixed connection, and the spring bolt is installed in the mechanism box body and can be in mechanism box body lateral sliding, and the both ends of first spring are connected with spring bolt and mechanism box body respectively.

Among the above-mentioned technical scheme, install the spring bolt through setting up the mechanism box body, the mechanism box body plays the guide effect to the transverse motion of spring bolt, compares and relies on first spring to make the spring bolt remove when not setting up the mechanism box body, and this scheme makes the operation of spring bolt reliable and stable, and can prolong unlocking structure's life.

In another preferred embodiment of the present invention, the lock tongue includes a frame body sleeved outside the headrest rod and fixedly connected to the second end of the pull cord, and a fastening strip fixedly connected to the inner wall of the frame body and capable of being inserted into the lock groove, and the frame body is elastically connected to the mechanism box body through a first spring.

Among the above-mentioned technical scheme, the card strip is the thin condition, is convenient for insert in the locked groove of headrest pole, card strip and framework rigid coupling, and the framework is spacing apart from the distance of locked groove to the card strip, improves the reliability of spring bolt.

The utility model discloses an in another kind of preferred embodiment, the leading wheel group is including a plurality of leading wheels that have the draw-in groove, and during a plurality of leading wheels were walked around to the stay cord and the card was gone into its draw-in groove, the leading wheel included that the second round pin axle through vertical setting is installed in the headrest body and with it rotate the first leading wheel of being connected and install in the mechanism box body and with it rotate the second leading wheel of being connected through the second round pin axle of vertical setting.

Among the above-mentioned technical scheme, first leading wheel and second leading wheel are to the stay cord, and during the operating button, guarantee that the stay cord can move according to the route of setting for the pulling spring bolt action.

In another preferred embodiment of the present invention, the unlocking structure further includes a mechanism housing with an opening at the front end, the mechanism box is installed in the mechanism housing, and the headrest rod is fixedly connected to the mechanism housing and the upper portion of the headrest rod is located in the mechanism housing.

In the technical scheme, the mechanism box body is accommodated by the mechanism cover fixedly connected with the headrest rod, so that the back of the seat headrest is more attractive.

In another preferred embodiment of the present invention, the number of the headrest rods is two, and the outer wall of one of the headrest rods is provided with a locking groove; and/or the left side and the right side in the headrest body are respectively provided with a sound box, and the wiring harness of the sound box penetrates through the headrest body to extend outwards.

Among the above-mentioned technical scheme, the headrest body is connected with the seat through two montants for the headrest pole is more firm with being connected of seat. Carry on the stereo set in the headrest body, compare and install the stereo set on the control panel of car, can promote the stereo set quality and the privacy in the car.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a rear side perspective view of a lift headrest with a back unlocked according to an embodiment.

Fig. 2 is an exploded view of the embodiment back unlocked lifting headrest.

Fig. 3 is a schematic diagram of the connection of the pull cord with the button, the guide wheel set and the latch bolt in the embodiment.

Fig. 4 is an internal structural view of the headrest body and the unlocking mechanism in the embodiment.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Reference numerals in the drawings of the specification include: the headrest comprises a headrest body 10, a headrest front part 11, a headrest rear part 12, a sound 13, a mounting seat 14, a strip-shaped groove 141, a headrest rod 20, a lock groove 21, a headrest rod fixing pin 22, a connecting rod 30, a pull rope 41, a guide wheel group 42, a first guide wheel 421, a second guide wheel 422, a second pin 423, a button 43, a second spring 431, a lock tongue 44, a frame body 441, a clamping strip 442, a first spring 443, a grooved wheel 45, a first pin 451, a clamping groove 452, a mechanism box 46, a mechanism outer cover 47, a pin hole 471, a mechanism front cover 48 and a headrest rear shell 50.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The utility model provides a lift headrest of back unblock, as shown in fig. 1, in a preferred embodiment, this lift headrest includes headrest poles 20 and headrest body 10, and headrest body 10 passes through headrest poles 20 to be installed on car seat, and headrest body 10 can be on headrest poles 20 vertical height-adjusting. In the present embodiment, the number of the headrest rods 20 is two, and both the headrest rods 20 are vertically arranged and located at the rear side of the headrest body 10.

As shown in fig. 2-4, one of the headrest rods 20 has a plurality of locking slots 21 spaced along the height direction thereof, for example, the locking slot 21 is disposed on the left side of the right headrest rod 20, and the lifting headrest of the present invention is further provided with an unlocking structure capable of being connected with the locking slot 21 of the right headrest rod 20. Specifically, the unlocking structure includes a pull rope 41, a guide wheel set 42 for guiding the pull rope 41, a button 43 connected to a first end (left end shown in fig. 3) of the pull rope 41, and a latch 44 fixedly connected to a second end (right end shown in fig. 3) of the pull rope 41, capable of being in insertion fit with the lock groove 21, and connected with a first spring 443, wherein the pull rope 41 is a flexible steel rope or wire rope, the service life is long, and the button 43 is abutted against or fixedly connected to the first end of the pull rope 41. The back surface of the headrest body 10 has an operation hole, a button 43 is fitted in the operation hole, and a latch tongue 44 can be manually switched between a locked state and an unlocked state by operating the button 43.

With such a technical solution, in a normal state, under the elastic force of the first spring 443, the latch tongue 44 is inserted into the lock groove 21 of the right headrest rod 20, so that the headrest body 10 is locked, and the headrest body 10 cannot move vertically relative to the headrest rod 20. When the height of the headrest body 10 needs to be adjusted, the button 43 is pressed forward by a hand of a person, the button 43 and the pull cord 41 act to bend the pull cord 41 forward under the guiding action of the guide pulley 42, the pull cord 41 overcomes the elastic force of the first spring 443 to move the latch tongue 44 leftward to disengage from the lock groove 21 of the right headrest rod 20, and the headrest body 10 is unlocked. Then, the headrest body 10 is vertically moved to a proper height with respect to the headrest rods 20, and then the button 43 is released, and the stay 41 is restored to the original state by the elastic force of the first spring 443, and simultaneously the latch tongue 44 is moved rightward to be inserted into the latch groove 21 of the right headrest rod 20, thereby completing the locking of the headrest body 10.

It should be noted that, when the button 43 is released, the latch tongue 44 moves backward and is not inserted into the lock groove 21, but abuts against the outer wall of the right headrest rod 20, and at this time, under the weight of the headrest body 10, the headrest body 10 moves downward, and the latch tongue 44 is inserted into the lock groove 21 immediately below under the elastic force of the first spring 443.

It should be noted that, when the first end of the pulling rope 41 is fixed to the button 43, the latch tongue 44 may be moved leftward to disengage from the lock groove 21 of the headrest rod 20 by pulling the button 43 outward to bend the pulling rope 41 backward, so as to unlock the headrest body 10.

As shown in fig. 2 to fig. 4, in the present embodiment, the unlocking structure further includes a mechanism box 46 that is sleeved on the two headrest rods 20 and can slide vertically on the two headrest rods 20, the headrest body 10 is fixedly connected with the mechanism box 46, for example, a U-shaped connecting rod 30 that is open backwards is fixedly connected in the headrest body 10, a rectangular opening corresponding to the connecting rod 30 is formed in the back surface of the headrest body 10, and two rod portions of the connecting rod 30 penetrate through the rectangular opening and are inserted into and fixedly connected with the mechanism box 46. The latch 44 is installed in the mechanism case 46 and can slide laterally (slide left and right as shown in fig. 4) in the mechanism case 46, and both ends of the first spring 443 are connected to the latch 44 and the mechanism case 46, respectively.

After the mechanism case 46 is provided, the push button 43 is pressed to unlock the headrest body 10, and then the mechanism case 46 is vertically moved on the headrest rod 20 to adjust the headrest body 10 to a proper position, and since the latch 44 is installed in the mechanism case 46, the latch 44 vertically moves together with the mechanism case 46.

In another preferred embodiment, as shown in fig. 3 to 5, when the button 43 abuts against the left end of the pulling rope 41, the left end of the pulling rope 41 is fixed to the headrest body 10, a grooved wheel 45 having a groove 425 that is movable in the front-rear direction of the headrest body 10 is further installed in the headrest body 10, and the groove 425 is annularly provided on the outer wall of the grooved wheel 45 to form an annular groove. The front end of the button 43 abuts against the rear end of the sheave 45, and the rope 41 is engaged in the engaging groove 452 at the front end of the sheave 45. Specifically, the headrest body 10 is fixedly connected with a mounting seat 14 having a groove and used for mounting the grooved pulley 45, the top and the bottom of the mounting seat 14 are respectively provided with a strip-shaped groove 141 extending in the front-rear direction, the upper end and the lower end of the grooved pulley 45 are respectively fixedly connected with a first pin 451 vertically arranged, the grooved pulley 45 is located in the groove of the mounting seat 14, and the first pin 451 at the two ends of the grooved pulley 45 is respectively inserted into the two strip-shaped grooves 141 and can slide back and forth in the strip-shaped groove 141.

One presses the button 43 forward, the button 43 moves the grooved pulley 45 forward in the mounting 14, and the grooved pulley 45 bends the pull cord 41 forward to pull the latch tongue 44 to the left. The grooved wheel 45 can reduce the friction resistance of the action of the pull rope 43 when the button 43 is pressed, so that the unlocking is more labor-saving.

As shown in fig. 3, in another preferred embodiment, a second spring 431 is disposed between the button 43 and the headrest body 10, two ends of the second spring 431 are respectively connected to the button 43 and the headrest body 10, preferably, the front end of the button 43 has a guide post, and the second spring 431 is sleeved on the guide post. The button 43 and the latch 44 are provided with independent return springs, and after the button 43 is released, the button 43 can be returned under the action of the second spring 431.

As shown in fig. 3, in another preferred embodiment, the latch 44 includes a frame 441 fixed to the right end of the cord 41 and fitted to the outside of the right headrest rod 20, and a locking bar 442 fixed to the left inner wall of the frame 441 and capable of being engaged in the locking groove 21, the right end of the first spring 443 is fixed to the frame 441, the left end of the first spring 443 is fixed to the mechanism case 46, and the frame 441 is elastically connected to the mechanism case 46 by the first spring 443. Preferably, the frame 441 is slidably connected to the mechanism case 46 in the lateral direction, and the frame 441 is slidable leftward in the mechanism case 46 by pressing the button 43 to pull the pull cord 41.

In another preferred embodiment, as shown in fig. 3 and 4, the guide wheel assembly 42 includes a plurality of guide wheels having catching grooves formed on the outer walls thereof to form a ring-shaped groove, and the pulling rope 41 is wound around the plurality of guide wheels and caught in the catching grooves. The guide wheels include a first guide wheel 421 installed in the headrest body 10 through a vertically arranged second pin 423 and rotatably connected therewith, and a second guide wheel 422 installed in the mechanism box 46 through a vertically arranged second pin 423 and rotatably connected therewith. For example, the number of the first guide wheels 421 is one, the number of the second guide wheels 422 is also one, and the right end of the pull rope 41 sequentially passes around the front end of the first guide wheel 421 and the rear end of the second guide wheel 422 from left to right and is fixedly connected to the left end of the frame 441.

In another preferred embodiment, as shown in fig. 2 and 3, the unlocking structure further includes a mechanism housing 47 with an open front end, the mechanism housing 47 is integrally injection-molded, the mechanism case 46 is installed in the mechanism housing 47, the headrest rod 20 is fixedly connected to the mechanism housing 47, and an upper portion of the headrest rod 20 is located in the mechanism housing 47. Specifically, the upper ends of the two headrest rods 20 sequentially pass through the bottom of the mechanism housing 47, the mechanism case 46 and extend to the top of the mechanism housing 47 from bottom to top, the upper ends of the headrest rods 20 are clamped with the top of the mechanism housing 47, and the two headrest rod fixing pins 22 pass through the pin holes 471 in the bottom of the mechanism housing 47 in the front-back direction and are inserted into the middle of the two headrest rods 20.

As shown in fig. 2, in another preferred embodiment, a mechanism front cover 48 is fixed to an opening at the front end of the mechanism cover 47, the mechanism front cover 48 has a downward opening "U" shaped structure, the front end surface of the mechanism front cover 48 contacts with the rear end surface of the headrest rear portion 12, and when the height of the headrest body 10 is adjusted vertically, the rear end surface of the headrest rear portion 12 slides vertically on the front end surface of the mechanism front cover 48.

In another preferred embodiment, as shown in fig. 1 and 2, a headrest rear case 50 with an open front end is fixed to the outside of the mechanism cover 47, and the mechanism cover 47 is located in the headrest rear case 50 to make the headrest more beautiful.

In another preferred embodiment, as shown in fig. 2, one sound 13 is provided on each of the left and right sides inside the headrest body 10, and the harness of the sound 13 extends outward through the headrest body 10. In the present embodiment, the headrest body 10 includes a headrest front portion 11 and a headrest rear portion 12, and an accommodation space for accommodating the sound 13 is provided between the headrest front portion 11 and the headrest rear portion 12.

In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A lifting headrest with an unlocked back comprises a headrest rod and a headrest body, wherein the headrest body is mounted on a seat through the headrest rod and can be vertically adjusted in height on the headrest rod; the headrest rod is provided with a plurality of locking grooves which are arranged at intervals along the height direction of the headrest rod, the lifting headrest is also provided with an unlocking structure which can be connected with the locking grooves, the unlocking structure comprises a pull rope, a guide wheel set for guiding the pull rope, a button connected with a first end of the pull rope, and a lock tongue which is fixedly connected with a second end of the pull rope, can be in plug fit with the locking grooves and is connected with a first spring, the back of the headrest body is provided with an operation hole, and the button is installed in the operation hole;

the pull rope is actuated by pressing/outwards pulling the button, the pull rope pulls the lock tongue to move so as to be separated from the lock groove of the headrest rod, and the button, the pull rope and the lock tongue can vertically move relative to the headrest rod along with the headrest body; and when the button is released, the lock tongue can be inserted into the lock groove of the headrest rod under the action of the first spring.

2. The back-unlocked lifting headrest of claim 1, wherein a first end of the pull rope is fixedly connected to the headrest body, the pull rope directly or indirectly abuts against the pull rope, and under the guiding action of the guide wheel set, the push button is pressed, and the pull rope can be bent forward to pull the latch bolt to move so as to disengage from the lock groove of the headrest rod;

or the first end of the pull rope is fixedly connected with the button, the button is pressed/pulled outwards under the guiding action of the guide wheel set, and the pull rope can be bent forwards/backwards to pull the lock tongue to move so as to be separated from the lock groove of the headrest rod.

3. The back unlocking headrest as claimed in claim 2, wherein when the first end of the pull rope is fixedly connected to the headrest body, a grooved wheel having a groove and capable of sliding in the front-back direction of the headrest body is further installed in the headrest body, the front end of the button abuts against the rear end of the grooved wheel, and the pull rope is clamped into the groove at the front end of the grooved wheel.

4. The back unlocking lifting headrest according to claim 3, wherein a mounting seat with a groove for mounting the grooved pulley is fixedly connected to the inside of the headrest body, the top and the bottom of the mounting seat are respectively provided with a strip-shaped groove extending in the front-back direction, the upper end and the lower end of the grooved pulley are respectively fixedly connected with a first vertically-arranged pin shaft, the grooved pulley is located in the groove, and the first pin shafts at the two ends of the grooved pulley are respectively inserted into the two strip-shaped grooves.

5. The lifting headrest with the back unlocking function as claimed in claim 1, wherein a second spring is arranged between the button and the headrest body, and two ends of the second spring are respectively connected with the button and the headrest body;

and/or the pull rope is a flexible steel rope or steel cable.

6. The lifting headrest with the unlocked back surface as claimed in any one of claims 1 to 5, wherein the unlocking structure further comprises a mechanism box body sleeved on the headrest rod and capable of vertically sliding on the headrest rod, the headrest body is fixedly connected with the mechanism box body, the lock tongue is installed in the mechanism box body and capable of transversely sliding in the mechanism box body, and two ends of the first spring are respectively connected with the lock tongue and the mechanism box body.

7. The headrest of claim 6, wherein the latch comprises a frame body sleeved outside the headrest rod and fixedly connected to the second end of the pull rope, and a clamping bar fixedly connected to the inner wall of the frame body and capable of being clamped into the locking groove, and the frame body is elastically connected to the mechanism box body through the first spring.

8. The lift headrest with back unlocking according to claim 6, wherein the guide wheel set includes a plurality of guide wheels with locking slots, the pull rope passes around the plurality of guide wheels and is locked into the locking slots thereof, the guide wheels include a first guide wheel rotatably mounted in the headrest body by a vertically disposed second pin and a second guide wheel rotatably mounted in the mechanism case by a vertically disposed second pin.

9. The lift headrest with unlocked back as claimed in claim 6, wherein said unlocking structure further comprises a mechanism housing with an open front, said mechanism case being mounted in said mechanism housing, said headrest rod being fixedly connected to the mechanism housing and an upper portion of the headrest rod being located in the mechanism housing.

10. The lift headrest with unlocked back as claimed in any one of claims 1 to 5, wherein said headrest rods are two in number, and wherein said locking groove is provided on an outer wall of one of said headrest rods;

and/or the left side and the right side in the headrest body are respectively provided with a sound box, and the wiring harness of the sound box penetrates through the headrest body to extend outwards.

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