CN218457724U - Multifunctional head supporting device - Google Patents

Abstract

The utility model discloses a multifunctional head support device, which comprises a headrest component and a bracket; the bracket is provided with a forward sliding guide plate, and the headrest assembly comprises a headrest main body and a sliding sleeve which is sleeved on the sliding guide plate in a sliding manner; an adjusting mechanism is arranged between the sliding sleeve and the sliding guide plate, and comprises an adjusting rod arranged on one of the sliding sleeve or the sliding guide plate and a guide part arranged on the other of the sliding sleeve or the sliding guide plate; the guide part comprises a tooth body and a circle of circulating guide groove positioned around the tooth body, and a positioning notch is arranged in the middle of the front end of the tooth body; the adjusting rod has elasticity and can deflect in the left and right directions, and a chuck clamped in the circulating guide groove is arranged on the adjusting rod; the headrest assembly is provided with an initial position and an extending position, and when the headrest assembly extends from the initial position to the extending position, the clamping head moves forwards along the circulating guide groove and is clamped in the positioning notch; when the headrest assembly is reset backwards, the clamping head is separated from the positioning notch and moves backwards along the circulating guide groove to reset.

Description

Multifunctional head supporting device

Technical Field

The utility model relates to a thing to sit on field, in particular to multi-functional head strutting arrangement.

Background

As a seat widely used by people in work and life, the office chair is generally accepted and loved by people, is one of essential furniture in modern office and household environments, and the headrest is used as the standard configuration of a high-end office chair, and whether the headrest has good comfort level and practical adjusting function or not is the most important of consumers. The headrests of the earliest office chairs on the market were generally fixed, and the sizes of individuals were different, and a headrest fixed in a certain position could not allow everyone to be in the best comfort position. Even if the adjustment of the headrest position is achieved by the elastic characteristics of the headrest material, the reaction force thereof presses the head, neck, or the like of the human body. The most common seat headrests in the market have the lifting adjusting function, and the headrests of the type can be lifted up and down along a headrest rod to improve the use comfort of the seat; such headrests, while being height-adjustable, are suitable for users of different heights; however, when the user uses the chair, the user has a plurality of using states, and sometimes needs to lean against the head at a slightly backward position when the user needs to relax; when the computer is used for work, the headrest is required to protrude forwards to provide obvious supporting function for the head; the headrest which can only be adjusted in a lifting way cannot meet the requirements, and cannot completely meet the requirement of a user on comfort; therefore, it is highly desirable to design a headrest capable of adjusting the front-rear depth of a seat for daily use.

In addition, although the user has the requirement of adjusting the front headrest and the rear headrest, the adjusting range of the headrest is not required to be overlarge; when the user uses the seat, the head of the user can abut against the headrest only when the user lies on the seat and has a rest after lying backwards, and in the using state, the position of the head of the user in the front-back direction does not change greatly; if the adjusting range of the headrest is too large or more adjusting gears are designed, the structure is complicated, and the use is not clear for a user; therefore, a headrest which has a front-back adjusting function and is clear and accurate in adjusting position needs to be designed.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a multifunctional head supporting device capable of adjusting the front and back depth, a bracket of the headrest is provided with a sliding guide plate extending towards the front, a sliding sleeve on the headrest component is connected on the sliding guide plate in a sliding way, so that the front and back depth adjustment of the headrest can be realized by sliding the sliding sleeve relative to the sliding guide plate; the headrest assembly has a definite initial position and a definite extending position, and when the headrest assembly extends out, the clamping head moves forwards along the circulating guide groove until the clamping head is clamped in the positioning notch; when the headrest component is reset, the chuck is separated from the positioning notch and moves backwards along the circulating guide groove to reset; the adjustment is accurate and in place, a control switch is not required to be additionally arranged, the headrest can move back and forth at two positions only by directly acting on the headrest assembly, and the operation is convenient and fast.

The technical scheme of the utility model is realized like this:

a multi-functional head restraint comprising a headrest assembly and a bracket for supporting the headrest assembly, the bracket being configured for attachment to a seat; the support is provided with a sliding guide plate extending forwards, and the headrest assembly comprises a headrest main body and a sliding sleeve which is sleeved on the sliding guide plate in a sliding manner; an adjusting mechanism is arranged between the sliding sleeve and the sliding guide plate, and comprises an adjusting rod arranged on one of the sliding sleeve or the sliding guide plate and a guiding part arranged on the other of the sliding sleeve or the sliding guide plate and used for guiding the adjusting rod to move; the guide part comprises a tooth body and a circle of circulating guide groove positioned around the tooth body, and a positioning notch is arranged in the middle position of the front end of the tooth body; the adjusting rod is elastic and can deflect in the left and right directions, and the adjusting rod is correspondingly provided with a clamping head clamped in the circulating guide groove; the headrest assembly is provided with an initial position and an extending position, and when the headrest assembly extends from the initial position to the extending position, the clamping head moves forwards along the circulating guide groove and is clamped in the positioning notch; when the headrest assembly is reset backwards, the clamping head is separated from the positioning notch and moves backwards along the circulating guide groove to reset.

Preferably, the circulating guide groove comprises a guide groove channel positioned on one side of the tooth body and a reset groove channel positioned on the other side of the tooth body; and in the process that the headrest assembly slides from the initial position to the extending position, the clamping head moves forwards along the guide channel and is automatically clamped into the positioning notch under the elastic action of the adjusting rod. When the adjusting headrest extends forwards, the headrest assembly is pulled forwards only without additionally arranging a locking mechanism, so that the structure is simplified.

Preferably, the front end of the guide channel is provided with a limiting groove, the chuck moves forwards furthest to abut into the limiting groove, and the adjusting rod deflects to drive the chuck to enter the positioning notch. When the headrest assembly is operated by a user, the headrest assembly can be loosened only by directly pulling the headrest assembly forwards until the clamping head abuts against the limiting groove, and the headrest assembly is adjusted in place in one step and has obvious limiting points.

Preferably, during the return of the headrest assembly from the extended position to the initial position, a force is applied to the headrest assembly to disengage the cartridge from the detent into the return channel and move the cartridge rearwardly along the return channel. When resetting, the user is required to actively apply acting force to the headrest assembly to reset, and the headrest assembly is prevented from automatically returning.

Preferably, a limiting elastic sheet is arranged in front of the positioning notch, and the limiting elastic sheet can elastically contract along the direction perpendicular to the sliding guide plate; the chuck moves forwards and extrudes the limiting elastic sheet, and after the chuck completely crosses the limiting elastic sheet, the chuck slides to the reset channel by taking the outer contour of the limiting elastic sheet as a path. Spacing shell fragment can restrict the dop and get into the channel that resets automatically, needs user's effect headrest to make the dop cross spacing shell fragment, and the dop just can get into the channel that resets.

Preferably, the limiting elastic sheet is of an arc-shaped structure, and the front end of the limiting elastic sheet upwards tilts. The outer contour of the limiting elastic sheet can play a role in guiding, and the chuck can enter the reset channel by taking the outer contour as a path.

Preferably, the positioning notch is V-shaped, the clamping head is clamped in the positioning notch, and the adjusting rod is in a centered state. The clamping head is clamped into the positioning notch, so that the left and right deformation of the adjusting rod can be avoided, and the headrest assembly is kept at the extending position.

Preferably, the adjusting rod is arranged in the sliding sleeve and is a long-strip-shaped rod piece, the front end of the adjusting rod is fixedly connected with the sliding sleeve, and the clamping head is arranged at the rear end of the adjusting rod.

Preferably, an elastic reset device is further arranged between the adjusting rod and the sliding sleeve, and the elastic reset device comprises two elastic columns which are symmetrically arranged; the adjusting rod is positioned between the two elastic columns; when the adjusting rod deflects left and right, the elastic column acts on the adjusting rod to enable the adjusting rod to have the tendency of always keeping the centering state. The elastic column is arranged, so that the structure of the adjusting rod is more stable, and the return and reset are quicker.

Preferably, the adjusting rod is made of elastic plastic materials. And the cost is lower by adopting plastic materials.

Preferably, a lifting adjusting mechanism is further arranged between the sliding sleeve and the headrest main body, and the lifting adjusting mechanism comprises a lifting sliding groove longitudinally arranged on the headrest main body and a guide block arranged on the sliding sleeve. The height of the headrest main body can be further adjusted, so that the headrest main body can be adjusted in the front-back direction and the up-down direction.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

the utility model discloses a multifunctional head support device, the headrest component has definite initial position and stretching position, when the headrest component stretches out, the chuck moves forward along the circulating guide groove until the chuck is clamped in the positioning gap; when the headrest assembly is reset, the clamping head is separated from the positioning notch and moves backwards along the circulating guide groove to reset; so that the adjustment is accurate and in place; and need not to set up control switch in addition, only need directly exert the effort to the headrest subassembly and can make the headrest carry out the back and forth movement in two positions, convenient operation is swift.

2, the upper end of the guide channel is provided with a limit groove, so that when adjusting, a user only needs to directly act on the headrest component to move forwards until the clamping head is propped into the limit groove, and then the headrest component can be loosened; then the clamping head can be automatically clamped into the positioning notch under the action of the elastic force of the adjusting rod; the headrest has obvious stopping points, so that a user can adjust the headrest in one step in the extending process.

3, a limiting elastic sheet is arranged in front of the positioning gap and limits the chuck in the positioning gap; when the headrest is reset, the user needs to act that the headrest moves forwards to enable the chuck to cross the limiting elastic sheet, and then the chuck enters the reset channel by taking the outer contour of the limiting elastic sheet as a path; the limiting elastic sheet can limit the chuck to be separated from the positioning notch and can guide the chuck to enter the reset channel; has double functions and ingenious design.

4, in the structure, the adjusting rod and the elastic column are made of elastic plastic materials, so that the cost is very low; compare with traditional some lift, glide machanism that are equipped with extension spring, steel sheet, make whole mechanism more retrencied undoubtedly, the production and processing cost that has significantly reduced.

Drawings

Fig. 1 is a schematic perspective view of a headrest according to an embodiment of the present invention;

fig. 2 is an exploded view of the headrest assembly and the bracket according to the embodiment of the present invention;

fig. 3 is a schematic perspective view of a guide portion according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of the headrest assembly in the initial position according to the embodiment of the present invention;

fig. 5 is a schematic perspective view illustrating the structure of the chuck sliding to the foremost end of the guide channel according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of the headrest assembly in an extended position according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of the embodiment of the present invention after the chuck crosses the limiting elastic sheet;

FIG. 8 is an exploded view of the embodiment of the present invention in which the adjusting lever is connected to the sliding sleeve;

fig. 9 is a schematic perspective view of the headrest body and the sleeve in the embodiment of the present invention.

The figures are numbered: a headrest assembly 1; a bracket 2; a slide guide plate 3; a headrest body 4; a sliding sleeve 5; a fixing rod 6; an adjusting lever 7; a guide section 8; a circulating guide groove 9; the guide channel 9a; a reset channel 9b; a tooth body 10; a chuck 11; a connecting column 12; an arc-shaped clamping groove 13; a mounting base 14; a mounting groove 15; an elastic column 16; a positioning notch 17; a limiting elastic sheet 18; a lifting chute 19; a guide block 20; a limiting groove 21.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present embodiment relates to reference orientations of components such as front, rear, etc., which are described in a normal use state in which a user is seated behind a seat.

The specific implementation manner of the utility model is as follows:

as shown in fig. 1-9, the utility model provides a multifunctional head support device, which comprises a headrest component 1 and a bracket 2 for supporting the headrest component 1, wherein the bracket 2 is fixedly connected with the chair back of a chair; the bracket 2 comprises a sliding guide plate 3 which extends forwards; the headrest assembly 1 comprises a headrest main body 4 and a sliding sleeve 5 which is sleeved on the sliding guide plate 3 in a sliding manner; then the sliding sleeve 5 on the headrest assembly 1 can slide back and forth along the sliding guide plate 3 to adjust the back and forth depth of the headrest main body 4, so that the comfort of a user in use is improved.

As shown in fig. 1-2, the bracket 2 is L-shaped, the bracket 2 further includes a fixing rod 6 disposed longitudinally, and the fixing rod 6 is connected and fixed to a seat back (not shown) of the seat; the sliding guide plate 3 is positioned at the upper end of the fixed rod 6, and after the fixed rod 6 and the seat are installed, the sliding guide plate 3 extends obliquely forwards and upwards; the sliding sleeve 5 is arranged at the rear end of the headrest body 4, and the sliding sleeve 5 is inclined from the headrest end to the rear lower part; when in connection, the sliding sleeve 5 can be directly sleeved on the sliding guide plate 3 in a sliding manner so that the sliding sleeve 5 can slide back and forth along the length direction of the sliding guide plate 3, and the back and forth depth of the headrest assembly 1 can be adjusted; the sliding guide plate 3 extends forwards and upwards, so that when the headrest assembly 1 is adjusted forwards and backwards, the sliding guide plate not only moves forwards and backwards, but also changes vertically; when the user rises, the head of the user can move forwards and also lift a little bit; can adapt to the dynamic sitting posture change of the human body, is more comprehensive in consideration and accords with the human engineering.

As shown in fig. 2-8, an adjusting mechanism is further disposed between the sliding sleeve 5 and the sliding guide plate 3, the adjusting mechanism can make the sliding process of the headrest assembly 1 smooth, the adjusting mechanism includes an adjusting rod 7 disposed in the sliding sleeve 5, and a guiding portion 8 disposed on the sliding guide plate 3 for guiding the adjusting rod 7 to move; specifically, the method comprises the following steps: the guide part 8 comprises a specially-shaped tooth body 10 and a circle of circulating guide grooves 9 positioned around the tooth body 10; the tooth body 10 and the circulating guide groove 9 are both arranged on the upper surface of the sliding guide plate 3, and the tooth body 10 is positioned at the middle line position of the sliding guide plate 3; the circulation guide groove 9 comprises a guide groove channel 9a positioned on one side of the tooth body 10 and a reset groove channel 9b positioned on the other side of the tooth body 10, and the guide groove channel 9a and the reset groove channel 9b are straight grooves.

The adjusting rod 7 is a long strip-shaped rod piece, and the adjusting rod 7 is positioned in the middle of the sliding sleeve 5 and is consistent with the length direction of the sliding sleeve 5; the front end of the adjusting rod 7 is fixedly connected with the sliding sleeve 5, the rear end of the adjusting rod 7 is a free end, a clamping head 11 is arranged on the free end, the clamping head 11 is perpendicular to the sliding guide plate 3, and the clamping head 11 protrudes in the circulating guide groove 9; in the process that the sliding sleeve 5 slides forwards and backwards relative to the sliding guide plate 3, the clamping head 11 circularly moves in the circular guide groove 9. The adjusting rod 7 is made of high-strength elastic plastic material and can deflect in the left-right direction relative to the sliding sleeve 5, so that the chuck 11 can move in the circulating guide groove 9 in a left-right offset mode.

And further: because the front end of the adjusting rod 7 is fixedly connected with the sliding sleeve 5, the chuck 11 at the rear end of the adjusting rod 7 is clamped in the circulating guide groove 9; then the sliding sleeve 5 is sleeved on the sliding guide plate 3 in a sliding manner and the sliding sleeve and the sliding guide plate can not be separated; wherein the fixing mode of the adjusting rod 7 and the sliding sleeve 5 is as follows: as shown in fig. 8, the upper end of the adjusting rod 7 is provided with a connecting column 12, and the connecting column 12 is perpendicular to the sliding sleeve 5; the front end of the sliding sleeve 5 is provided with an opening through which the adjusting rod 7 passes, the opening is provided with an arc-shaped clamping groove 13 which can be matched with the connecting column 12 in a clamping manner, the arc-shaped clamping groove 13 is a semicircular groove, the connecting column 12 can be just clamped into the arc-shaped clamping groove 13, and the connecting column 12 is matched with the arc-shaped clamping groove 13 in a clamping manner; a mounting seat 14 is connected on the sliding sleeve 5 to fix the adjusting rod 7, and a semicircular mounting groove 15 capable of being matched with the connecting column 12 is correspondingly arranged on the mounting seat 14; the mounting seat 14 is fixed on the sliding sleeve 5 through screw connection, the connecting column 12 is clamped and fixed between the arc-shaped clamping groove 13 and the mounting groove 15, and the upper end of the adjusting rod 7 is fixedly connected with the sliding sleeve 5. By adopting the connection mode, the sliding sleeve 5 can not be separated from the sliding guide plate 3 from front to back by adjusting the rod 7, the design is ingenious, and the structure is simple and reliable.

As shown in fig. 4-7, since the front end of the adjusting rod 7 is fixed to the sliding sleeve 5, the adjusting rod 7 can elastically deflect in the left-right direction relative to the sliding sleeve 5 with the fixed point as a fulcrum, and the chuck 11 can deflect left and right in the circulating guide groove 9; an elastic resetting device which enables the adjusting rod 7 to be always kept at a central position is further arranged between the mounting seat 14 and the adjusting rod 7, the elastic resetting device comprises two elastic columns 16 arranged on the mounting seat 14, and the elastic columns 16 are arranged in bilateral symmetry; after the mounting seat 14 is connected with the sliding sleeve 5, the length directions of the elastic columns 16 and the sliding sleeve 5 are kept consistent, the adjusting rod 7 is just positioned between the two elastic columns 16, then when the adjusting rod 7 elastically deflects, the adjusting rod 7 abuts against the elastic columns 16, and then the elastic columns 16 act on the adjusting rod 7 to enable the adjusting rod 7 to keep a reset trend after deflecting; and the connecting column 16 and the elastic clamping piece 8 are both made of high-strength elastic plastic materials, so that the strength is met, and the cost can be saved.

As shown in fig. 3 to 7, the front and rear adjustment process of the headrest assembly 1 is as follows: as shown in fig. 4, in the initial position, the head restraint 16 is located at the intersection of the rear end of the guide channel 9a and the rear end of the reset channel 9b, the adjusting rod 7 is not deflected, and the headrest assembly 1 is located at the rearmost position; when the headrest assembly 4 needs to be adjusted to move forwards, the headrest assembly 4 is only pulled forwards, the adjusting rod 7 deflects to enable the chuck 11 to enter the guide channel 9a and move forwards along the guide channel 9a, as shown in fig. 3 and 5, a positioning notch 17 in a V shape is arranged at the middle position of the front end of the tooth body 10, and a limiting groove 21 is arranged at the front end of the guide channel 9a; when the chuck 11 moves forward and is abutted into the limiting groove 21, the headrest assembly 4 can be loosened, the adjusting rod 7 automatically deflects to a centered state under the elastic action of the adjusting rod 7 and the elastic column 16, as shown in fig. 6, the chuck 11 is clamped into the positioning notch 17 at the moment, a limiting elastic sheet 18 is arranged in front of the positioning notch 17, and the limiting elastic sheet 18 can elastically contract along a direction perpendicular to the sliding guide plate 3; when acting force is not applied to the headrest assembly 1, the limiting elastic sheet 18 can limit the chuck 11 to be separated from the positioning notch 17 forwards, and two sides of the chuck 11 are propped against the positioning notch 17, so that the headrest assembly 1 can be stopped at the extending position for use; then when making user's adjustment headrest subassembly 4 stretch out, only need directly stimulate headrest subassembly 4 antedisplacement until dop 11 support in spacing recess 21 can for can one step put in place during the adjustment, have obvious stop point, the adjusting position is accurate clear and definite.

When the headrest assembly 1 needs to slide backwards again for resetting, as shown in fig. 7, the user applies an acting force to the headrest assembly 1 to enable the headrest assembly 1 to continue moving forwards, and the chuck 11 extrudes and acts on the limiting elastic sheet 18 to enable the limiting elastic sheet 18 to deform until the chuck 11 moves forwards and completely crosses the limiting elastic sheet 18; when the chuck 11 passes over the limiting elastic sheet 18, a click sound is heard, and the limiting elastic sheet 18 bounces again to reset; the limiting elastic sheet 18 is of an arc-shaped structure, the front end of the limiting elastic sheet 18 upwarps, the warping end of the limiting elastic sheet 18 can limit the chuck 11 to return backwards, the outer contour of the limiting elastic sheet 18 has a guiding effect, the chuck 11 enters the reset channel 9b by taking the outer contour of the limiting elastic sheet 18 as a path, and then the headrest assembly 1 is acted to move backwards so that the chuck 11 slides to the initial position again along the reset channel 9 b. Then when the clamping head 11 circularly moves in the circulating guide groove 9 for a circle, the headrest assembly 1 extends forwards from the initial position and then resets backwards from the extending position, and the headrest assembly 4 can circularly move back and forth between the initial position and the extending position through the circular movement of the clamping head 11 in the circulating guide groove 9, so that the design is ingenious, and the adjusting position is definite; the whole adjusting process is simple and convenient, a user only needs to directly act on the headrest assembly 4, and the operation is labor-saving and light; moreover, under the elastic action of the adjusting rod 7 and the elastic column 16, the operation process has good damping hand feeling, and the adjusting effect is better.

As shown in fig. 9, a lifting adjusting mechanism is further disposed between the headrest body 4 and the sliding sleeve 5, and the lifting adjusting mechanism includes a pair of lifting sliding grooves 19 longitudinally disposed on the headrest body 4, and a guide block 20 correspondingly disposed at the front end of the sliding sleeve 5; the guide block 20 is in sliding fit with the lifting chute 19; the headrest body 4 can not only be adjusted in depth forwards and backwards, but also can further slide up and down to adjust the height of the headrest body, so that the headrest body 4 can be adjusted in a lifting way to be suitable for users with different body types, and can be adjusted in depth forwards and backwards to provide different supporting effects; the headrest body 4 is more comfortable to use.

In conclusion, the multifunctional head support device can effectively realize the adjustment of the headrest main body 4 in the front-back and up-down movement, and greatly improves the use comfort of the headrest; the whole structure is simple, the adjusting rod 7 and the elastic column 16 are made of elastic plastics, the cost is low, and the production cost can be saved; in addition, the operation is very convenient and fast, the headrest component 4 has a definite initial position and an extension position, the headrest can be adjusted only by directly pulling the headrest, and a control switch is not required to be additionally arranged, so that the whole shape is simpler and more attractive.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (11)

1. A multifunctional head support device is characterized in that: the headrest assembly comprises a headrest assembly and a bracket for supporting the headrest assembly, wherein the bracket is configured to be connected with a seat; the support is provided with a sliding guide plate extending forwards, and the headrest assembly comprises a headrest main body and a sliding sleeve which is sleeved on the sliding guide plate in a sliding manner; an adjusting mechanism is arranged between the sliding sleeve and the sliding guide plate, and comprises an adjusting rod arranged on one of the sliding sleeve or the sliding guide plate and a guiding part arranged on the other of the sliding sleeve or the sliding guide plate and used for guiding the adjusting rod to move; the guide part comprises a tooth body and a circle of circulating guide groove positioned around the tooth body, and a positioning notch is arranged in the middle position of the front end of the tooth body; the adjusting rod has elasticity and can deflect in the left and right directions, and the adjusting rod is correspondingly provided with a clamping head clamped in the circulating guide groove; the headrest assembly is provided with an initial position and an extending position, and when the headrest assembly extends from the initial position to the extending position, the clamping head moves forwards along the circulating guide groove and is clamped in the positioning notch; when the headrest assembly is reset backwards, the clamping head is separated from the positioning notch and moves backwards along the circulating guide groove to reset.

2. The multi-functional head support according to claim 1, wherein: the circulating guide groove comprises a guide groove channel positioned on one side of the tooth body and a reset groove channel positioned on the other side of the tooth body; and in the process that the headrest assembly slides from the initial position to the extending position, the chuck moves forwards along the guide channel and is automatically clamped into the positioning notch under the elastic action of the adjusting rod.

3. The multi-functional head support according to claim 2, wherein: the front end of the guide channel is provided with a limiting groove, the chuck moves forwards furthest to abut into the limiting groove, and the adjusting rod deflects to drive the chuck to enter the positioning notch.

4. The multi-functional head support according to claim 2, wherein: when the headrest component is reset from the extending position to the initial position, acting force is applied to the headrest component to enable the chuck to be separated from the positioning notch, enter the reset channel and move backwards along the reset channel.

5. The multi-functional head support according to claim 4, wherein: a limiting elastic sheet is arranged in front of the positioning notch, and the limiting elastic sheet can elastically contract along the direction vertical to the sliding guide plate; the chuck moves forwards and extrudes the limiting elastic sheet, and after the chuck completely crosses the limiting elastic sheet, the chuck slides to the reset channel by taking the outer contour of the limiting elastic sheet as a path.

6. The multi-functional head support according to claim 5, wherein: the shape of the limiting elastic sheet is an arc with the front end tilting upwards.

7. The multi-functional head support according to claim 1, wherein: the location breach is "V" type, and the dop card is gone into in the breach of location, adjusts the pole and is in state placed in the middle.

8. The multi-functional head support according to claim 1, wherein: the adjusting rod is arranged in the sliding sleeve and is a long strip-shaped rod piece, the front end of the adjusting rod is fixedly connected with the sliding sleeve, and the clamping head is arranged at the rear end of the adjusting rod.

9. The multi-functional head support according to claim 8, wherein: an elastic reset device is also arranged between the adjusting rod and the sliding sleeve, and the elastic reset device comprises two elastic columns which are symmetrically arranged; the adjusting rod is positioned between the two elastic columns; when the adjusting rod deflects left and right, the elastic column acts on the adjusting rod to enable the adjusting rod to have the tendency of always keeping the centering state.

10. The multi-functional head support according to claim 1, wherein: the adjusting rod is made of elastic plastic.

11. The multi-functional head support according to claim 1, wherein: the headrest is characterized in that a lifting adjusting mechanism is further arranged between the sliding sleeve and the headrest main body, and the lifting adjusting mechanism comprises a lifting sliding groove longitudinally arranged on the headrest main body and a guide block arranged on the sliding sleeve.

Images