CN217145756U

CN217145756U - Seat headrest and seat

Info

Publication number: CN217145756U
Application number: CN202220539753.XU
Authority: CN
Inventors: 苏峥; 罗京; 郭孝文
Original assignee: Yutong Bus Co Ltd
Current assignee: Yutong Bus Co Ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-08-09
Anticipated expiration: 2032-03-11

Abstract

The utility model relates to a seat headrest and seat, seat headrest includes: the back side of the headrest framework is provided with a guide slideway; the limiting elastic sheet is fixedly arranged on the rear side of the headrest framework and provided with a vertical overhanging section, and a guide long hole is formed in the vertical overhanging section and used for being inserted and matched with a limiting pin on the seat backrest; the lower end of the vertical overhanging section is provided with an inclined extending section, the inclined extending section extends forwards gradually from top to bottom, and the inclined extending section is provided with a lower pushing surface used for pushing a limiting pin to force the vertical overhanging section to swing forwards when a headrest is installed downwards. The slope extension section that vertical overhang section lower extreme was arranged makes things convenient for the spacer pin to push away to drive vertical overhang section and swing forward, and mounting tool is saved to easy to assemble, simultaneously, when dismantling, only need press the slope extension section forward, with the swing forward of forcing vertical overhang section, makes the spacer pin deviate from the business turn over end, convenient quick dismantlement.

Description

Seat headrest and seat

Technical Field

The utility model belongs to the technical field of the seat, concretely relates to seat headrest and seat.

Background

At present, seats on load transportation equipment such as airplanes, automobiles, rail vehicles and the like are all provided with headrests for increasing comfort, so that passengers can rest and lean against the headrests. Some headrests are mounted directly above the seat back and some are mounted on the front side of the top of the seat back, as disclosed in the utility model patent with publication number CN 214240799U. In addition, in order to further improve the comfort, the four-direction adjustable headrest has four-direction adjustable functions, including an up-down sliding adjustment function and a left-right lug overturning angle function.

In consideration of beauty and comfort, the seat with the headrest positioned at the front side of the backrest is widely applied, and in the seat, a guide slideway structure is arranged between the headrest framework and the backrest framework for guiding the headrest to be adjusted up and down in a guiding way, and the two damping guide rails for realizing the headrest guide movement disclosed in the utility model with the publication number of CN214240799U are of a double-slideway structure. Or a slide assembly for moving the seat headrest up and down as disclosed in the utility model patent publication No. CN212890956U, which is a roller slide structure.

Except for the guide slideway structure, the limit position of the headrest moving up and down is limited by a mode of forming a long round hole in the middle and penetrating a pin shaft into the middle for limiting. Specifically, a flat elastic sheet is arranged on a headrest framework, the flat elastic sheet is provided with a vertical section extending along the vertical direction, a long round hole extending along the vertical direction is formed in the vertical section, a pin shaft is arranged on the backrest framework, and the pin shaft penetrates into the long round hole to limit the upper limit position and the lower limit position of the headrest. But through the mode of relying on flat shell fragment to go spacing, when the flexible material extrusion deformation of headrest and back, push away flat shell fragment forward swing easily, lead to appearing the condition that the round pin axle deviates from the slotted hole easily in fatigue test and daily use to, this kind of flat shell fragment need stir the shell fragment forward swing with the help of the instrument when the assembly in order to realize the installation and the dismantlement of headrest, because headrest and back assembly space are comparatively narrow and small, lead to installing and removing all comparatively inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a seat headrest, which solves the technical problem that the headrest is inconvenient to assemble and disassemble because a flat spring sheet at the rear part of the headrest is required to be stirred forwards by means of a tool in the prior art; simultaneously, the utility model also provides a seat of using above-mentioned seat headrest.

The utility model provides a technical scheme of seat headrest is:

a seat headrest comprises a headrest framework and a limiting elastic sheet fixedly arranged on the rear side of the headrest framework, wherein a guide slideway is arranged on the rear side of the headrest framework and is used for enabling the seat headrest to be assembled on the front side of the top of a seat back in a guiding mode in the vertical direction; the limiting elastic sheet is provided with a vertical overhanging section extending along the vertical direction, the vertical overhanging section is provided with a guiding long hole extending along the vertical direction, and the guiding long hole is used for being inserted and matched with a limiting pin on the seat backrest so as to limit the vertical sliding stroke of the seat headrest; the lower end of the vertical overhanging section is provided with an inclined extending section, the inclined extending section gradually extends forwards from top to bottom, the inclined extending section is provided with a lower pushing surface, and the lower pushing surface is used for pushing the limiting pin to force the vertical overhanging section to swing forwards when a seat headrest is installed downwards; the bottom end of the guide long hole is an inlet end and an outlet end, so that the limit pin can enter and exit the guide long hole.

The beneficial effects are that: the utility model provides a seat headrest is last, not only sets up the direction slide at headrest skeleton rear side, conveniently guides seat headrest along upper and lower direction assembly on the seat back. Simultaneously, utilize the direction slot hole on the vertical overhanging section of spacing shell fragment to insert with the corresponding spacer pin on the seat back and join in marriage, restriction seat headrest reciprocates the stroke to, the slope extension section that vertical overhanging section lower extreme was arranged makes things convenient for the spacer pin to push away to drive vertical overhanging section and swing forward, and is easy to assemble, saves mounting tool. Meanwhile, when the device is disassembled, the inclined extension section is pressed forwards only to force the vertical overhanging section to swing forwards, so that the limiting pin is separated from the inlet and outlet end, and the device is disassembled quickly. By utilizing the inclined extension section, no additional tool is required for assembly and disassembly, and the assembly and disassembly are convenient.

As a further improvement, the inclined extension is a straight extension.

The beneficial effects are that: the inclined extension section adopts a straight extension section, and the processing and the manufacturing are more convenient.

As a further improvement, the limiting elastic sheet is provided with an upper mounting section, the upper mounting section is fixedly assembled with the headrest framework, the vertical overhanging section is arranged in a backward staggered manner relative to the upper mounting section, the vertical overhanging section is provided with a rear arch extending section, the rear arch extending section is arranged in a backward protruding manner, and the lower end of the rear arch extending section is in transitional connection with the upper end of the inclined extending section.

The beneficial effects are that: the vertical overhanging section is arranged rearward relative to the upper mounting section to form a primary step, and the rear arch-extending section is arranged protruding rearward to form a secondary step, so that the upper end of the inclined extending section is arranged as downward as possible.

As a further improvement, the access end of the guide slot is located on the rear arch extension.

As a further improvement, the guide slideway is of a single-slideway structure, the guide slideway comprises an outer sliding shell and an inner slideway, one of the outer sliding shell and the inner slideway is fixedly assembled with the headrest framework, the other one of the outer sliding shell and the inner slideway is fixedly assembled with the seat backrest, a plurality of counter bores are sequentially distributed on one of the outer sliding shell and the inner slideway at intervals along the vertical direction to form a plurality of gears, the other one of the outer sliding shell and the inner slideway is provided with a ball, the outer sliding shell or the inner sliding sleeve provided with the ball is provided with an elastic part, the elastic part applies elastic acting force for forcing the ball to be pressed into the counter bores to the ball, and the counter bores are tapered holes.

The beneficial effects are that: the guide slideway adopts a single slideway structure. And the mode that outer slip shell and interior slide cooperate is adopted, overall structure is simple, and the precision is convenient for control. Meanwhile, the balls and the counter bores are utilized to form gear matching, so that the position of the seat headrest can be conveniently adjusted by a passenger according to actual needs, and the comfort is improved.

As further improvement, the seat headrest comprises a headrest sponge, the headrest sponge is fixedly installed on the front side of the headrest framework, a rear extension section is arranged at the top of the headrest sponge, and the rear extension section extends backwards for a set distance to shield the guide slide way and the limiting elastic piece from top to bottom.

The beneficial effects are that: the top of the headrest sponge is provided with a rear extension section, so that the guide slide way and the limiting elastic sheet are shielded, and the overall attractiveness of the seat can be improved.

As a further improvement, the rear extension section extends upwards from a forward rear inclination.

The beneficial effects are that: the rear extension section extends upwards from the front to the rear inclined, so that the head of a passenger can conveniently lean backwards, and the comfort can be improved.

As a further improvement, the guide long hole comprises a long hole section, the long hole section is communicated with the inlet and outlet end, and the width of the inlet and outlet end is larger than that of the long hole section.

The utility model provides a technical scheme is:

a seat comprises a seat backrest and a seat headrest, wherein the seat headrest is arranged on the front side of the top of the seat backrest in a vertically adjustable manner, and comprises a headrest framework and a limiting elastic sheet fixedly arranged on the rear side of the headrest framework, a guide slide way is arranged on the rear side of the headrest framework and used for enabling the seat headrest to be assembled on the front side of the top of the seat backrest in a vertically guiding manner; the limiting elastic sheet is provided with a vertical overhanging section extending along the vertical direction, the vertical overhanging section is provided with a guiding long hole extending along the vertical direction, and the guiding long hole is used for being inserted and matched with a limiting pin on the seat backrest so as to limit the vertical sliding stroke of the seat headrest; the lower end of the vertical overhanging section is provided with an inclined extending section, the inclined extending section gradually extends forwards from top to bottom, the inclined extending section is provided with a lower pushing surface, and the lower pushing surface is used for pushing the limiting pin to force the vertical overhanging section to swing forwards when a seat headrest is installed downwards; the bottom end of the guide long hole is an inlet end and an outlet end, so that the limit pin can enter and exit the guide long hole; the seat back is provided with a limiting pin, and the limiting pin is inserted and matched with the guide long hole in the seat headrest so as to limit the vertical sliding stroke of the seat headrest.

The beneficial effects are that: the utility model provides an on the seat, not only set up the direction slide at the headrest skeleton rear side of seat headrest, conveniently guide the seat headrest and assemble on the seat back along upper and lower direction, simultaneously, utilize the direction slot hole on the vertical overhanging section of spacing shell fragment to insert with the corresponding spacer pin on the seat back and join in marriage, restriction seat headrest reciprocates the stroke. And the inclined extension section arranged at the lower end of the vertical overhanging section is convenient for the limit pin to push so as to drive the vertical overhanging section to swing forwards, so that the installation is convenient, and an installation tool is omitted. Meanwhile, when the device is disassembled, the inclined extension section is pressed forwards only, and the vertical overhanging section is forced to swing forwards, so that the limiting pin is separated from the inlet and outlet end, and the device is disassembled quickly. By utilizing the inclined extension section, no additional tool is required for assembly and disassembly, and the assembly and disassembly are convenient.

As a further improvement, the guide slot hole comprises a slot hole section, the slot hole section is communicated with an inlet and outlet end of the guide slot hole, the width of the inlet and outlet end is greater than that of the slot hole section, a stop flange is arranged at the front end of the limit pin, the size of the stop flange is less than or equal to that of the inlet and outlet end, and the stop flange is greater than that of the slot hole section.

The beneficial effects are that: the stop flange is arranged on the limit pin, so that the risk of the limit pin and the limit elastic sheet being separated can be effectively reduced.

As a further improvement, the inclined extension is a straight extension.

The beneficial effects are that: the vertical overhanging section is arranged backward relative to the upper mounting section to form a primary step, and the rear arch extending section is arranged to protrude backward to form a secondary step, so that the upper end of the inclined extending section is arranged downward as much as possible.

Drawings

Fig. 1 is a schematic structural diagram of a seat provided by the present invention;

FIG. 2 is a half cross-sectional view of the seat shown in FIG. 1;

FIG. 3 is an enlarged view of a portion of the headrest and backrest connection of FIG. 2;

FIG. 4 is a schematic view of the headrest of FIG. 3;

FIG. 5 is a rear view of the headrest shown in FIG. 4;

FIG. 6 is a transverse cross-sectional view of FIG. 5;

fig. 7 is a schematic view of a process of installing the headrest shown in fig. 1.

Description of reference numerals:

1. a seat headrest; 2. a seat back; 3. a headrest sponge; 31. a rear extension section; 4. a guide slide way; 5. A headrest framework; 51. an intermediate skeleton; 52. two side skeletons; 6. a limiting elastic sheet; 61. an upper mounting section; 62. A vertical overhanging section; 620. a rear arch extension; 63. a guide long hole; 64. an inlet and an outlet; 65. an obliquely extending section; 7. a spacing pin; 8. an inner slide way; 9. an outer slip shell; 10. a ball bearing; 11. an elastic member; 12. a counterbore.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.

The present invention will be described in further detail with reference to examples.

The utility model provides a concrete embodiment 1 of seat:

as shown in fig. 1 to 7, the seat in this embodiment integrally includes a seat back 2 and a seat headrest 1, and the seat headrest 1 is mounted on the top front side of the seat back 2 in a vertically adjustable position.

The seat headrest 1 integrally comprises a headrest framework 5 on the rear side and a headrest sponge 3 on the front side, the headrest framework 5 specifically comprises a middle framework 51 and two side frameworks 52, the two side frameworks 52 are hinged on the left side and the right side of the middle framework 51, and the headrest sponge 3 is fixedly installed on the front side of the headrest framework 5 to form side ears in an adjustable direction when the two side frameworks 52 rotate.

The rear side of headrest skeleton 5 specifically sets up direction slide 4 at the rear side of middle skeleton 51 intermediate position, direction slide 4 makes the direction assembly about the headrest in the top front side of backrest 2, direction slide 4 includes outer slipcase 9 and inner slide 8, outer slipcase 9 is the plastics slipcase, inner slide 8 is the aluminium system slide, inner slide 8 is along direction assembly about in outer slipcase 9, inner slide 8 fixed mounting is on the back skeleton of backrest 2, outer slipcase 9 fixed mounting is on the headrest mount.

In this embodiment, the left and right sides of interior slide 8 sets up the direction limit respectively, and in this embodiment, the direction limit is the square, and the both sides direction is followed and is extended in parallel from top to bottom, sets up the direction concave part in outer slide shell 9 inboard, and the shape of direction concave part will be with direction limit shape adaptation for the direction limit closely cooperates with the direction concave part, and the upper and lower both ends of outer slide shell 9 are open structure, conveniently from top to bottom with outer sliding sleeve and 8 suits of interior slide together, also conveniently comes outer sliding sleeve and 8 splits of interior slide. In fact, the damping of the relative movement sliding of the guide slideway 4 is provided by the transition fit of the outer sliding shell 9 and the inner sliding shell 8, the left and right widths of the inner sliding shell 8 and the outer sliding shell 9 are wide, so that enough damping force can be provided, and the stability of the damping value during batch production can be ensured by a single guide slideway 4, so that the damping consistency of the vertical sliding of the headrest can be ensured for the headrest adopting the single-sliding-rail structure.

Furthermore, a plurality of counter bores 12 are sequentially distributed on the inner slide way 8 at intervals along the up-down direction to form a plurality of gears, that is, one counter bore 12 corresponds to one gear, and the counter bores 12 are all in a conical hole structure, preferably in a conical shape. A positioning recess is provided at a rear intermediate position of the outer slide case 9, and the ball 10 is positioned and fitted in the positioning recess. Also, an elastic member 11 is disposed in the positioning recess, and the elastic member 11 applies an elastic force to the ball 10 to force the ball 10 to be pressed into the counterbore 12.

When the headrest framework is used, the elastic piece 11 at the bottom of the ball 10 applies an outward force, and the edge of the counter bore 12 is provided with the chamfer, so that when the inner slideway 8 and the outer sliding shell 9 need to be switched from a certain gear, the headrest framework 5 can be pushed by a certain force to be separated from the counter bore, the relative movement of the inner slideway 8 and the outer sliding shell 9 can have a gear function, and each gear can enable the headrest framework 5 to stop at a corresponding position and need a certain pushing force to switch gears.

In addition, in this embodiment, there is spacing shell fragment 6 at the side fixed mounting of direction slide 4 on headrest framework 5, this spacing shell fragment 6 includes upper portion installation section 61, bending transition section and vertical overhanging section 62, upper portion installation section 61 passes through the screw and is in the same place with headrest framework 5 fixed assembly, vertical overhanging section 62 is whole to extend along upper and lower direction, the lower extreme of vertical overhanging section 62 is the overhanging free end, bending transition section bending transition arranges to make the relative upper portion installation section of vertical overhanging section 62 behind the dislocation arrangement.

The vertical overhanging section 62 is provided with a guide long hole 63 extending in the vertical direction for being inserted into the limit pin 7 on the seat back 2, and the limit pin 7 is in stop fit with the upper end and the lower end of the guide long hole 63 to limit the vertical sliding stroke of the seat headrest 1.

In this embodiment, the bottom end of the long guide hole 63 is an inlet/outlet end 64 for the stopper pin 7 to enter and exit the long guide hole 63. The front end of the limit pin 7 on the seat back 2 is provided with a stop flange, and accordingly, the guide slot 63 includes a slot section, the slot section is communicated with the inlet and outlet end 64 of the guide slot 63, the width of the inlet and outlet end 64 is greater than that of the slot section, in fact, the size of the stop flange is smaller than or equal to that of the inlet and outlet end 64, and the stop flange is greater than that of the slot section, so that it is ensured that the limit pin 7 can be inserted into the inlet and outlet end 64 of the guide slot 63 to enter the guide slot 63, and meanwhile, the limit pin 7 can be matched with the slot section to realize anti-falling limit.

It should be noted that the limit pin 7 in this embodiment includes a plastic bushing, the plastic bushing is sleeved on the screw and fixed on the headrest framework 5 by the screw, and the plastic bushing is provided with a corresponding stop flange.

For easy assembly and disassembly, the lower end of the vertical overhanging section 62 is provided with an inclined extension section 65, and the inclined extension section 65 is positioned below the guide long hole 63. The inclined extension 65 is a straight extension extending forward from top to bottom. The inclined extension 65 has a lower pushing surface for pushing the stopper pin 7 to force the vertically suspended section 62 to swing forward when the headrest is mounted downward.

And the lower part of the vertical overhanging section 62 is provided with a rear arch extension section 620, the rear arch extension section 620 is arranged by protruding 2-3 mm backwards, and the lower end of the rear arch extension section is in transition connection with the upper end of the inclined extension section 65. Preferably, the access end 64 of the guide slot 63 is located on the rear arch extension 620.

In addition, because seat headrest 1 is located the top front side of backrest 2, direction slide 4 and spacing shell fragment 6 all are located the rear side of seat headrest 1, when inserting seat headrest 1 on backrest 2 from top to bottom, need leave certain clearance between seat headrest 1 and backrest 2, when the passenger down looks from last, sees inner structure easily. In order to avoid this condition to influence the seat aesthetic property, headrest sponge 3 adopts the design of turning over backward to above demand, headrest sponge 3's top has back extension section 31, back extension section 31 is upwards extended by preceding back slope and is set for the distance, shelter from direction slide 4 and spacing shell fragment 6 from top to bottom, the condition of leaking outward of slide rail can effectively be sheltered from to the structure of turning over backward that is formed by back extension section, simultaneously for passenger's neck, the head provides the support of bigger area, the pleasing to the eye and the comfortable degree of headrest have been promoted.

As shown in fig. 7 (a), when the seat headrest 1 is installed on the front side of the top of the seat back 2, the outer sliding sleeve and the inner sliding channel 8 are inserted and matched correspondingly, the inclined extension section 65 at the lower end of the limiting elastic sheet 6 just contacts with the limiting pin 7 of the seat back 2, and due to the existence of the lower pushing surface of the inclined extension section 65, when the seat headrest 1 moves downwards, the limiting pin 7 pushes the inclined extension section 65 to swing forwards so as to avoid the limiting pin 7, so that the seat headrest can slide downwards normally.

When the seat headrest 1 continues to slide downward as shown in fig. 7 (b), the stop flange of the stopper pin 7 slides into the in-out section of the guide long hole 63, and at this time, the stopper spring 6 naturally returns. When the seat headrest 1 slides up and down, the stopper pin 7 always slides in the guide long hole 63, and the seat headrest 1 is further vertically stopped by the stopper pin 7, and as shown in fig. 7 (c), the seat headrest 1 slides to the lowest point.

In the whole installation process, no tool is needed, the limit pin 7 is used for pushing the inclined extension section 65 at the lower part of the limit elastic sheet 6, the limit elastic sheet 6 can be forced to swing forwards to realize abdication, and the installation is convenient.

When the seat headrest is disassembled, the seat headrest 1 is moved upwards to the upper limit position and then slightly moved downwards, so that the limit pin 7 is just positioned in the inlet and outlet end 64 at the lower part of the guide long hole 63, then the seat headrest is manually inserted from the bottom of the seat headrest 1, the inclined extension section 65 of the limit elastic sheet 6 is pressed forwards, the whole limit elastic sheet 6 is forced to swing forwards, the limit pin 7 is further enabled to be separated from the guide long hole 63, and then the seat headrest 1 can be disassembled from the seat backrest 2.

In this embodiment, spacing shell fragment can be installed in advance on the seat headrest, and the slope extension section that spacing shell fragment lower extreme was arranged both easy to assemble, also make things convenient for manual pressing of manual work to realize dismantling, has avoided the inconvenience of bolt installation and the not enough scheduling problem of operating space. In addition, the shell fabric on the seat backrest and the seat headrest is deformed due to extrusion of the seat backrest and the seat headrest, when the limiting elastic sheet is extruded to deform, the lower end of the inclined extension section can be pressed on the backrest framework preferentially to establish a blocking relation, the strength of the limiting elastic sheet can be improved, the deformation caused by extrusion of the shell fabric on the inclined extension section is reduced, and the risk that the limiting pin is accidentally disengaged from the guide long hole in the daily use process is reduced.

The utility model provides a concrete embodiment 2 of seat:

the difference from example 1 is mainly that: in embodiment 1, the guide slide comprises an outer slide shell fixedly mounted on the seat headrest and an inner slide fixedly mounted on the seat back. In this embodiment, the inner slide may also be fixedly mounted to the seat headrest and the outer slide may be fixedly mounted to the seat back.

Counterbores for forming the gears may be disposed on the outer slide housing and balls and springs may be correspondingly disposed on the inner slide.

The counter bore can adopt a conical bore and a pyramid bore, but preferably adopts a conical bore, so that the processing and the manufacturing are convenient.

The utility model provides a concrete embodiment 3 of seat:

the difference from example 1 is mainly that: in embodiment 1, the inclined extension section at the lower part of the limiting elastic sheet is a linear extension section. In this embodiment, the inclined extension is an arc-shaped extension.

The utility model provides a concrete embodiment 4 of seat:

the difference from example 1 is mainly that: in embodiment 1, vertical overhang section arranges by the back relatively upper portion installation section, forms one-level step, and the back encircles the extension backward and arches, forms one-level step again, and two-stage step cooperatees for business turn over end can arrange backward as far as possible, and the forward extension effect of slope extension section is leaned on arranging again, can effectively reduce the risk that the spacer pin deviates from the direction slot hole in the daily use. In this embodiment, the rear arch extension section may be omitted, and at this time, only the vertical overhanging section is disposed on the limit elastic piece, so as to form a step relatively.

The utility model provides a concrete embodiment 5 of seat:

the difference from example 1 is mainly that: in example 1, the guide runners were purchased directly from outsourcing. In this embodiment, the guide chute may also adopt a double chute structure or a roller chute structure, which is commonly used in the prior art.

The utility model provides a concrete embodiment 6 of seat:

the difference from example 1 is mainly that: in example 1, the rear extension section arranged on the top of the headrest sponge extends upwards from the front to the rear in an inclined mode. In this embodiment, the rear extension of the top of the headrest sponge may also extend rearward in the horizontal direction.

Of course, if the upper space is enough, the cost problem is not considered, the shielding part can be directly arranged at the top end of the seat back, the guide slide way and the limiting elastic sheet can be shielded by the shielding part, and the rear extension section does not need to be arranged at the top of the seat headrest.

The utility model discloses still provide the embodiment of a seat headrest, the structure of the seat headrest in this embodiment is the same with the structure of the seat headrest in above-mentioned seat embodiment 1, and is no longer repeated here.

In other embodiments, the seat headrest of any one of the above-described seat embodiments 2 to 6 may be used as the structure of the seat headrest.

Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made without inventive effort to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat headrest comprises a headrest framework (5) and a limiting elastic sheet (6) fixedly installed on the rear side of the headrest framework (5), wherein a guide slide way (4) is arranged on the rear side of the headrest framework (5), and the guide slide way (4) is used for enabling the seat headrest to be assembled on the front side of the top of a seat back (2) in a vertically guiding mode; the limiting elastic sheet (6) is provided with a vertical overhanging section (62) extending along the vertical direction, a guiding long hole (63) extending along the vertical direction is formed in the vertical overhanging section (62), and the guiding long hole (63) is used for being inserted and matched with a limiting pin (7) on the seat backrest (2) so as to limit the vertical sliding stroke of the seat headrest (1); the seat headrest device is characterized in that the lower end of the vertical overhanging section (62) is provided with an inclined extending section (65), the inclined extending section (65) gradually extends forwards from top to bottom, the inclined extending section (65) is provided with a lower pushing surface, and the lower pushing surface is used for pushing the limiting pin (7) to force the vertical overhanging section (62) to swing forwards when the seat headrest is installed downwards; the bottom end of the guide long hole (63) is an inlet and outlet end (64) for the limiting pin (7) to enter and exit the guide long hole (63).

2. The seat headrest according to claim 1, characterized in that the inclined extension (65) is a rectilinear extension.

3. The seat headrest according to claim 1 or 2, characterized in that the limiting elastic sheet (6) is provided with an upper mounting section (61), the upper mounting section (61) is fixedly assembled with the headrest framework (5), the vertical overhanging section (62) is arranged in a rearward staggered manner relative to the upper mounting section, the vertical overhanging section (62) is provided with a rear arch extension section (620), the rear arch extension section (620) is arranged in a rearward protruding manner, and the lower end of the rear arch extension section is in transitional connection with the upper end of the inclined extension section (65).

4. The seat headrest according to claim 3, characterized in that an access end (64) of the guide long hole (63) is located on the rear arch extension (620).

5. The seat headrest according to claim 1 or 2, wherein the guide chute (4) is of a single-chute structure, the guide chute (4) comprises an outer slide shell (9) and an inner chute (8), one of the outer slide shell (9) and the inner chute (8) is fixedly assembled with the headrest framework (5), the other one of the outer slide shell (9) and the inner chute (8) is fixedly assembled with the seat backrest (2), and a plurality of counter bores (12) are sequentially distributed on one of the outer slide shell (9) and the inner chute (8) at intervals along the up-down direction to form a plurality of gears, the other one is provided with a ball (10), the outer sliding shell (9) or the inner sliding sleeve provided with the ball (10) is provided with an elastic piece (11), the elastic member (11) applies an elastic force to the ball (10) to force the ball (10) to press into the counterbore (12), and the counterbore (12) is a tapered hole.

6. The seat headrest according to claim 1 or 2, characterized in that the seat headrest comprises a headrest sponge (3), the headrest sponge (3) is fixedly installed at the front side of the headrest framework (5), a rear extension section (31) is arranged at the top of the headrest sponge (3), and the rear extension section (31) extends backwards for a set distance to shield the guide slideway (4) and the limiting elastic sheet (6) from top to bottom.

7. The seat headrest according to claim 6, characterized in that the rear extension section (31) extends upward from a forward-rear inclination.

8. The seat headrest according to claim 1 or 2, characterized in that the guide long hole (63) includes a long hole section penetrating the access end (64), and a width of the access end (64) is larger than a width of the long hole section.

9. A seat comprising a seat back (2) and a seat headrest (1), the seat headrest (1) being installed at a top front side of the seat back (2) in a vertically adjustable position, characterized in that the seat headrest (1) employs the seat headrest according to any one of claims 1 to 7; the seat back (2) is provided with a limiting pin (7), and the limiting pin (7) is inserted into a guide long hole (63) in the seat headrest (1) to limit the vertical sliding stroke of the seat headrest (1).

10. The seat according to claim 9, wherein the guide slot (63) comprises a slot section, the slot section is communicated with an inlet and outlet end (64) of the guide slot (63), the width of the inlet and outlet end (64) is larger than that of the slot section, the front end of the limit pin (7) is provided with a stop flange, the size of the stop flange is smaller than or equal to that of the inlet and outlet end (64), and the stop flange is larger than that of the slot section.