CN113212272B - Vehicle with a steering wheel - Google Patents

Abstract

The invention provides a seat headrest assembly and a vehicle, wherein the seat headrest assembly comprises a headrest rod, a middle bracket, a sliding bracket and a shell, wherein one end of the headrest rod is arranged in the middle bracket in a vertically sliding manner; the sliding bracket can be arranged in the middle bracket in a front-back sliding manner; the middle bracket is provided with an upper driving part, a lower driving part and a front driving part and a rear driving part; the upper and lower driving parts are in transmission connection with the headrest rod and are used for driving the middle bracket to slide up and down along the headrest rod; the front and rear driving parts are in transmission connection with the sliding support and are used for driving the sliding support to slide back and forth relative to the middle support; the shell is fixedly connected with the sliding support, the middle support and the sliding support are contained in the shell, and the other end of the headrest rod extends out of the shell. The seat headrest assembly can realize four-way adjustment of the headrest, meet different position requirements of users, and improve the use comfort of the headrest.

Description

Vehicle with a steering wheel

Technical Field

The invention relates to the technical field of seats, in particular to a seat headrest assembly. The invention also relates to a vehicle with the seat headrest assembly.

Background

The headrest is an important personal protection part in the automobile and plays roles in protecting the neck and the head and relieving fatigue. When the vehicle has a rear-end collision, the human body falls backwards due to inertia, the pressure of acceleration or deceleration of the vehicle is concentrated on the fragile neck and head of the human body, and the headrest has a buffering effect on the pressure to protect the neck and head of the human body.

Currently, headrests are mainly classified into two categories, one being non-adjustable and the other being adjustable. The adjustable automobile headrest is divided into manual adjustment and automatic adjustment. The manual adjustable headrest can only be adjusted in a multi-stage one-way mode, the headrest is unlocked through the transmission mechanism by pressing the button in the conventional manual adjusting mode, accordingly, headrest adjustment is achieved, the headrest can only be adjusted to a corresponding design gear in a design stroke, and the manual adjustable headrest belongs to stepped adjustment. The automatically adjustable promptly electronic regulation headrest, the actuating mechanism of current electronic headrest generally all sets up on the seat back, and it not only leads to the headrest installation procedure complicated, increases during assembly man-hour, and the cost is higher. And the electric headrest on the market is mostly adjusted in the vertical direction, so that the use limitation is large, and the comfort experience of the headrest during use is not good enough.

Disclosure of Invention

In view of the above, the present invention is directed to a seat headrest assembly, which can improve the comfort of using the headrest.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a seat headrest assembly comprising a headrest rod, an intermediate support, a sliding support and a housing, wherein:

one end of the headrest rod is arranged in the middle bracket in a vertically sliding manner;

the sliding bracket can be arranged in the middle bracket in a front-back sliding manner;

the middle bracket is provided with an upper driving part, a lower driving part and a front driving part and a rear driving part;

the upper and lower driving parts are in transmission connection with the headrest rods and are used for driving the middle support to slide up and down along the headrest rods;

the front and rear driving part is in transmission connection with the sliding support and is used for driving the sliding support to slide back and forth relative to the middle support;

the shell is fixedly connected with the sliding support, the middle support and the sliding support are contained in the shell, and the other end of the headrest rod extends out of the shell.

Further, the upper and lower driving part adopts an upper and lower driving motor; the upper and lower driving motors are in transmission connection with the headrest rod through an upper and lower transmission structure; the front and rear driving part adopts a front and rear driving motor; and the front and rear driving motors are in transmission connection with the sliding support through front and rear transmission structures.

Furthermore, the upper and lower transmission structures comprise an upper and lower transmission racks and an upper and lower transmission gear which are meshed with each other; the upper and lower transmission racks are arranged on the headrest rod; the driving end of the upper driving motor and the lower driving motor is provided with a first driving rod, and the upper transmission gear and the lower transmission gear are arranged on the first driving rod.

Furthermore, one end of the upper and lower transmission racks is provided with an upper and lower limiting structure; the middle bracket is provided with an upper limit part and a lower limit part which are arranged up and down; the upper limit part and the lower limit part are used for being respectively abutted against the upper limit structure and the lower limit structure so as to limit the up-and-down sliding stroke of the middle bracket.

Furthermore, one end of the upper and lower transmission racks is provided with a plug-in connector; clamping bulges are arranged on the side parts of the upper and lower transmission racks; the plug is inserted into the headrest rod from the end part of the headrest rod; the clamping bulge is clamped in the clamping hole at the side part of the headrest rod.

Furthermore, the front and rear transmission structure comprises a front and rear transmission rack and a front and rear transmission gear which are meshed with each other; the front and rear transmission racks are arranged on the sliding bracket; and the driving end of the front and rear driving motors is provided with a second driving rod, and the front and rear transmission gears are arranged on the second driving rod.

Furthermore, a first front and rear limiting structure positioned on one side of the middle bracket is arranged on the sliding bracket; a second front and rear limiting structure on the other side of the middle bracket is arranged on the shell; the first front and rear limiting structures and the second front and rear limiting structures are used for being abutted to the middle support respectively so as to limit the front and rear sliding stroke of the sliding support.

Further, a first gap eliminating part is arranged between the middle support and the headrest rod; and/or a second gap eliminating part is arranged between the middle bracket and the sliding bracket; the first gap eliminating part is used for eliminating a movement gap between the middle bracket and the headrest rod; the second gap eliminating part is used for eliminating a movement gap between the middle bracket and the sliding bracket.

Further, the first gap eliminating part comprises a first elastic sheet arranged on the middle support; the first elastic sheet is provided with a rubber block; the rubber block is in sliding butt joint with the headrest rod.

Furthermore, the second gap eliminating part comprises a second elastic sheet arranged on the middle bracket; the second elastic sheet is abutted against the sliding support.

Further, the shell comprises a front shell and a rear shell which are buckled together; the front shell and the rear shell are fixedly connected to the sliding support respectively.

Compared with the prior art, the invention has the following advantages:

the seat headrest assembly can realize four-way adjustment of the headrest under the driving of the upper and lower driving parts and the front and rear driving parts, so that different position requirements of a user can be met, and the use comfort of the headrest can be improved.

Meanwhile, the middle support, the sliding support, the upper and lower driving parts, the front and rear driving parts and the like are arranged in the shell of the headrest, so that a headrest adjusting driving structure and the like can be prevented from being arranged in a seat back, the headrest mounting process can be simplified, the assembly difficulty can be reduced, the assembly cost can be reduced, and the headrest mounting efficiency can be improved.

In addition, another object of the present invention is to provide a vehicle, wherein the seat headrest assembly is disposed on a seat of the vehicle.

Further, a collision detection unit and a control unit are arranged on the vehicle; the collision detection unit is used for acquiring a collision signal of the vehicle and transmitting the collision signal to the control unit; the control unit is used for controlling the front and rear driving part to act so as to enable the seat headrest assembly to be close to the head of an occupant.

According to the vehicle, the seat headrest assembly is adopted, and the collision detection unit and the control unit are arranged, so that the headrest can be close to the head of the occupant when the vehicle collides, and the head and neck of the occupant can be better protected during collision.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:

FIG. 1 is a schematic view of a seat headrest assembly according to a first embodiment of the invention;

FIG. 2 is a front view of a seat headrest assembly according to a first embodiment of the invention;

FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is a schematic view of a seat headrest assembly without a housing according to a first embodiment of the invention;

FIG. 6 is a schematic view of the seat headrest assembly of FIG. 5 from another perspective;

fig. 7 is a schematic structural diagram of a front shell according to a first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a rear housing according to a first embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an intermediate bracket according to a first embodiment of the present invention;

FIG. 10 is a schematic view of an assembly structure of the headrest rod and the upper and lower transmission gears according to the first embodiment of the present invention;

FIG. 11 is a sectional view showing an assembled state of the headrest rod and the upper and lower transmission gears illustrated in FIG. 10;

fig. 12 is a schematic structural view of a headrest rod in a lowest position according to a first embodiment of the present invention;

fig. 13 is a schematic structural view of the headrest rod in the highest position limiting state according to the first embodiment of the present invention;

fig. 14 is a schematic structural diagram of a first elastic piece according to a first embodiment of the present invention;

fig. 15 is a schematic structural view of a second elastic piece according to a first embodiment of the present invention;

description of reference numerals:

1. a housing; 101. a front housing; 1011. mounting holes; 1012. a housing fastening hole; 102. a rear housing; 1021. a housing attachment hole; 1022. a limiting plate; 1023. a strip hole; 1024. a second front and rear limiting structure; 2. a middle support; 201. a sliding cavity; 202. a first spring plate mounting position; 203. a transmission gear mounting hole; 3. a sliding bracket; 301. a front and rear transmission rack; 302. connecting columns; 303. a first front and rear limit structure; 4. a headrest pole; 401. a clamping hole; 402. an interface; 41. an upper transmission rack and a lower transmission rack; 411. a limiting end face; 412. clamping the bulges; 413. a limiting jaw; 414. a plug-in connector; 5. a first spring plate; 51. a rubber block; 6. an up-down driving motor; 61. a first drive lever; 62. an upper transmission gear and a lower transmission gear; 7. a front and rear driving motor; 71. a second drive lever; 72. front and rear transmission gears; 8. a second elastic sheet; 9. a wire harness; 91. a plug-in unit; 10. a fastener; 100. an upper limit part; 200. a lower limit portion.

Detailed Description

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

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

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

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

This embodiment A

The present embodiment relates to a seat headrest assembly which includes, in an integral configuration, a headrest rod 4, an intermediate bracket 2, a sliding bracket 3, and a housing 1.

Wherein, the one end of headrest pole 4 can be set up in middle support 2 with sliding up and down, and sliding support 3 can be set up in middle support 2 with sliding back and forth, is equipped with the upper and lower drive division that links to each other with headrest pole 4 transmission on middle support 2 to and with sliding support 3 transmission continuous front and back drive division, this upper and lower drive division is used for ordering about middle support 2 along headrest pole 4 up-and-down slip, and front and back drive division is used for ordering about sliding support 3 for middle support 2 front and back slip. In addition, the housing 1 is fixedly connected with the sliding support 3, the middle support 2 and the sliding support 3 are accommodated in the housing 1, and the other end of the headrest rod 4 extends out of the housing 1.

The seat headrest assembly of the embodiment can realize the up-down, front-back and four-direction adjustment of the headrest, so that the requirements of different positions of a user can be met, and the use comfort of the headrest can be improved. Meanwhile, the middle support, the sliding support, the upper and lower driving parts, the front and rear driving parts and the like are arranged in the shell of the headrest, so that the headrest adjusting driving structure and the like can be prevented from being arranged in a seat back, the headrest mounting process can be simplified, the assembly difficulty can be reduced, the assembly cost can be reduced, and the headrest mounting efficiency can be improved.

Based on the above general description, an exemplary structure of a seat headrest assembly of the present embodiment is shown in fig. 1, and as described in the foregoing, the seat headrest assembly includes a headrest rod 4, an intermediate bracket 2, a sliding bracket 3, and a housing 1. Wherein, casing 1 links firmly with sliding support 3, and middle support 2 and sliding support 3 are acceptd in casing 1, and the one end of headrest poles 4 stretches out to outside the casing 1.

Specifically, the housing 1 of the present embodiment includes a front shell 101 and a rear shell 102 that are fastened together, and the front shell 101 and the rear shell 102 are respectively fixed to the sliding bracket 3. As shown in fig. 1 to 4 in combination with fig. 7 and 8, the front case 101 and the rear case 102 of the present embodiment are each configured with a groove to form a mounting space in which the sliding bracket 3 and the middle bracket 2 can be accommodated after the front case 101 and the rear case 102 are fastened. A case fastening hole 1012 and a case coupling hole 1021 are provided in the front case 101 and the rear case 102, respectively. The front case 101 and the rear case 102 are fastened by fastening members 10, such as screws or bolts, etc., inserted through the case fastening holes 1021 after the front case 101 and the rear case 102 are fastened together, so that the front case 101 and the rear case 102 are fastened together by screwing.

In order to facilitate the fixing of the sliding bracket 3 to the housing 1, a fixing hole is formed at one end of the sliding bracket 3 of this embodiment, and a mounting hole 1011 is formed on the front case 101 corresponding to the fixing hole and fastened in the fixing hole by a fastener 10 penetrating through the mounting hole 1011, so that the sliding bracket 3 is screwed and fixed to the front case 101. Here, the fastener 10 can also be a screw or a bolt.

The other end of the sliding bracket 3 is provided with a connecting column 302, an insertion hole with a rectangular cross section is formed in the connecting column 302, a plurality of limiting plates 1022 are arranged on the inner wall of the rear shell 102 corresponding to the insertion hole, the outer edge of each limiting plate 1022 can be abutted against the inner wall of the insertion hole, so that the connecting column 302 is limited on the rear shell 102. That is, the other end of the sliding bracket 3 is inserted into and matched with each of the limit plates 1022 through the insertion hole to be fixedly connected with the rear shell 102.

With the above structure, after the front shell 101 and the rear shell 102 are fastened and fixed, the two ends of the sliding bracket 3 can be relatively fixed with the front shell 101 and the rear shell 102, respectively.

In addition, in the present embodiment, the housing 1 is further provided with a long hole 1023 through which the headrest rod 4 passes, and a long axis of the long hole 1023 extends in the front-rear direction of the headrest, so that the headrest rod 4 can be prevented from moving and interfering with the movement of the intermediate bracket 2 in the front-rear direction of the headrest as described below.

It should be noted that, in addition to the above-mentioned snap-fit, screw-fit fastening form, the front shell 101 and the rear shell 102 of the present embodiment may also be connected by snap-fit or other forms. In addition, the fixed connection form between the sliding bracket 3 and the front shell 101 and the rear shell 102 of the present embodiment may also adopt other structural forms besides the above structural form, and only needs to satisfy the requirement that the front shell 101, the rear shell 102 and the sliding bracket 3 are relatively fixed.

It should be noted that the elongated hole 1023 may be separately formed on the front shell 101 or the rear shell 102, or two notches formed on the front shell 101 and the rear shell 102 may be adopted, and the elongated hole 1023 may be formed after the front shell 101 and the rear shell 102 are fastened.

Referring to fig. 1 to 6 and 9, the headrest rods 4 of the present embodiment are provided in the intermediate bracket 2 so as to slide up and down at the other end thereof with respect to one end of the outer case 1, and the sliding bracket 3 is provided in the intermediate bracket 2 so as to be movable forward and backward. Wherein, the middle bracket 2 is provided with an upper and lower driving part which is connected with the headrest rod 4 in a transmission way, and a front and rear driving part which is connected with the sliding bracket 3 in a transmission way. The up-down driving part is used for driving the middle bracket 2 to slide up and down along the headrest rod 4, and the front-back driving part is used for driving the sliding bracket 3 to slide back and forth relative to the middle bracket 2.

Specifically, the up-down driving unit employs an up-down driving motor 6, and the up-down driving motor 6 is in transmission connection with the headrest rod 4 through an up-down transmission structure. Preferably, the up-down driving structure of the present embodiment includes an up-down driving rack 41 and an up-down driving gear 62 which are engaged with each other, wherein the up-down driving rack 41 is provided on the headrest rod 4. The driving end of the up-down driving motor 6 is provided with a first driving lever 61, and the up-down transmission gear 62 is provided on the first driving lever 61.

In order to improve the stability of the headrest rods 4 during the up-and-down movement process, in the present embodiment, the upper and lower transmission racks 41 are respectively disposed on the two headrest rods 4. The up-down driving motor 6 is disposed at a position near the middle of one side of the middle bracket 2, and the first driving rod 61 has driving ends respectively disposed at both ends of the up-down driving motor 6, and the up-down driving gear 62 is sleeved on both the driving ends and is engaged with the up-down driving rack 41. Therefore, under the driving of the upper and lower driving motors 6, the first driving rod 61 rotates and drives the two upper and lower transmission gears 62 to synchronously rotate, so that the two headrest rods 4 can synchronously move up and down, and the movement stability is better.

It should be understood that, in addition to the upper and lower transmission racks 41 being disposed on both the headrest rods 4, the upper and lower transmission racks 41 may be disposed on only one of the headrest rods 4, that is, the upper and lower transmission gears 62 and the upper and lower transmission racks 41 are correspondingly disposed as a group, at this time, in order to enable the two headrest rods 4 to move up and down synchronously, a corresponding connection structure needs to be disposed between the two headrest rods 4, and specifically, the two headrest rods can be fixedly connected through a connection rod, for example.

In this embodiment, the up-down transmission rack 41 is clipped on the headrest rod 4. As shown in fig. 10 to 13, one end of the upper and lower transmission racks 41 is provided with a plug 414, and the side portions of the upper and lower transmission racks 41 are provided with a locking protrusion 412, wherein the plug 414 is inserted into the insertion opening 402 formed on the headrest rod 4 from the end portion of the headrest rod 4, and the locking protrusion 412 is locked in the locking hole 401 at the side portion of the headrest rod 4. The structure is simple, the processing and the manufacturing are easy, the assembly is convenient, and meanwhile, the connecting effect is good.

As a further improvement of this embodiment, in order to limit the headrest rod 4 during the up-and-down movement, with reference to fig. 10 to 13, in this embodiment, one end of the up-and-down transmission rack 41 is provided with an up-and-down limiting structure, the middle bracket 2 is provided with an upper limiting portion 100 and a lower limiting portion 200 which are arranged up and down, and the upper limiting portion 100 and the lower limiting portion 200 are used to abut against the up-and-down limiting structure respectively to limit the up-and-down sliding stroke of the middle bracket 2.

The upper and lower limiting structure specifically includes a limiting end surface 411 located at the end of the upper and lower transmission racks 41 and a limiting claw 413 located on the side surface of the end of the upper and lower transmission racks 41. The upper limit portion 100 and the lower limit portion 200 are specifically limit plates 1022 disposed on the middle bracket 2. In the lowest position of the headrest, the limit end face 411 abuts on the upper limit portion 100, and in the highest position of the headrest, the limit claw 413 abuts on the lower limit portion 200.

In the present embodiment, the upper and lower limiting structures are matched with the upper limiting part 100 and the lower limiting part 200, so as to effectively limit the vertical sliding stroke of the middle bracket 2, and the upper and lower limiting structures are matched with the middle and upper and lower driving motors 6, so as to realize the stepless adjustment of the vertical movement of the headrest.

To facilitate the sliding support 3 to be able to move back and forth relative to the intermediate support 2, a sliding chamber 201 for the sliding support 3 to slide is configured on the intermediate support 2. In order to facilitate the sliding of the sliding bracket 3 relative to the middle bracket 2, in this embodiment, the protruding ribs extending along the sliding direction are disposed on the sliding bracket 3, and the protruding ribs abut against the inner wall of the sliding cavity 201, so that the contact area between the sliding bracket 3 and the middle bracket 2 can be reduced, and the sliding friction force can be reduced, thereby enabling the sliding bracket 3 to slide along the sliding cavity 201 smoothly.

In this embodiment, the front and rear driving unit employs a front and rear driving motor 7, and the front and rear driving motor 7 is in transmission connection with the sliding bracket 3 through a front and rear transmission structure. Specifically, the front and rear transmission structure includes a front and rear transmission rack 301 and a front and rear transmission gear 72 that are engaged with each other, the front and rear transmission rack 301 is disposed on the sliding bracket 3, a second driving rod 71 is disposed at a driving end of the front and rear driving motor 7, and the front and rear transmission gear 72 is disposed on the second driving rod 71. Thus, under the driving of the front and rear driving motor 7, the second driving lever 71 rotates and drives the front and rear driving gear 72 to rotate along the front and rear driving gear 72, so that the sliding bracket 3 moves in the front and rear direction of the headrest relative to the intermediate bracket 2 to realize the front and rear movement of the headrest.

It should be noted that the front-rear transmission structure is substantially the same as the structure of the middle-upper-lower transmission structure, that is, as shown in fig. 6, the front-rear driving motor 7 is fixedly connected to the middle support 2, a driving end of the front-rear driving motor 7 is connected to the second driving rod 71, two ends of the second driving rod 71 are respectively fixedly connected to the front-rear transmission gears 72, and the two front-rear transmission gears 72 are respectively engaged with the front-rear transmission racks 301 disposed on the sliding support 3.

In addition, it should be noted that the upper and lower driving motors 6 and the front and rear driving motors 7 of the present embodiment are respectively connected with the wire harnesses 9, and each wire harness 9 is connected to the corresponding position of the upper and lower driving motors 6 and the front and rear driving motors 7 through the connector 91. In addition, a wiring harness 9 for signal transmission on the up-down drive motor 6 and the front-rear drive motor 7 is connected to a control unit described below. Thus, automatic adjustment of the headrest can be facilitated.

In addition, as shown in fig. 6 and 9 in conjunction, the front-rear driving motor 7 is disposed side by side with the up-down driving motor 6, and driving ends of the front-rear driving motor 7 and the up-down driving motor 6 are respectively located at upper and lower ends of the middle bracket 2, so that the first driving lever 61 and the second driving lever 71 are respectively disposed at the upper and lower ends of the middle bracket 2. Meanwhile, the two up-down transmission gears 62 provided at both ends of the first driving lever 61 and the two front-rear transmission gears 72 provided at both ends of the second driving lever 71 are correspondingly installed in the transmission gear installation 203 formed at the intermediate bracket 2. Therefore, the arrangement of the upper and lower driving parts and the front and rear driving parts in the shell can be facilitated, and the structural arrangement is more compact.

In order to facilitate the limit of the movement stroke of the headrest in the front-back direction, in this embodiment, referring to fig. 2 and 3, the sliding bracket 3 is provided with a first front-back limit structure 303 located on one side of the middle bracket 2, and the housing 1 is provided with a second front-back limit structure 1024 located on the other side of the middle bracket 2. The first front and rear limiting structures 303 and the second front and rear limiting structures 1024 are used for abutting against the middle bracket 2 respectively so as to limit the front and rear sliding stroke of the sliding bracket 3.

In the embodiment, the front and back sliding stroke of the sliding support 3 can be effectively limited by the arrangement of the first front and back limiting structure 303 and the second front and back limiting structure 1024, and the front and back limiting structure is matched with the front and back driving motors 7, so that the front and back movement of the headrest can be adjusted steplessly.

It should be noted that the up-down driving part and the front-back driving part of the present embodiment may be implemented by other driving devices, such as a cylinder, an oil cylinder, etc., besides the motor. In addition, the up-down transmission structure and the front-back transmission structure can be in transmission connection by adopting a matching form of a worm gear, a worm, a helical gear and the like besides a gear and a rack.

As a further improvement of this embodiment, in order to enable the headrest to be stably adjusted in the height direction, a first anti-backlash portion is provided between the intermediate bracket 2 and the headrest rod 4, and in order to enable the headrest to be more stable during the forward and backward movement, a second anti-backlash portion is provided between the intermediate bracket 2 and the sliding bracket 3. The first anti-backlash part is used for eliminating a movement gap between the middle support 2 and the headrest rod 4, and the second anti-backlash part is used for eliminating a movement gap between the middle support 2 and the sliding support 3.

Specifically, as shown in fig. 1 and 9 in combination with fig. 14 and 15, the first anti-backlash portion includes a first resilient piece 5 disposed on the middle bracket 2, and the first resilient piece 5 is integrally in a bow shape and is specifically mounted in a first resilient piece mounting position 202 formed on the middle bracket 2. Furthermore, a rubber block 51 is arranged on the first elastic sheet 5, and the rubber block 51 is in contact with the headrest rod 4 in a sliding way. Therefore, the headrest adjusting device not only is beneficial to stable adjustment of the headrest, but also can effectively eliminate friction abnormal sound with the headrest rod 4, thereby greatly reducing noise during headrest adjustment and improving the comfort of the headrest.

The second anti-backlash portion specifically includes a second elastic sheet 8 disposed on the middle bracket 2, and the second elastic sheet 8 is specifically clamped on one sidewall of the sliding cavity 201, so that the second elastic sheet 8 abuts against the sliding bracket 3. Therefore, the stability of the sliding support 3 in the moving process can be improved, and the movement noise generated by overlarge gaps can be reduced.

It is understood that, in addition to the above-mentioned case of simultaneous arrangement, only one of the first anti-backlash portion and the second anti-backlash portion may be separately arranged. The effect of providing the first and second anti-backlash portions simultaneously is not as advantageous as described above, only when the first and second anti-backlash portions are separate. Of course, it can also be understood that the first anti-backlash portion and the second anti-backlash portion of the present embodiment may also adopt other structural forms in the prior art besides the structure in the foregoing.

The seat headrest assembly of this embodiment can realize the quadriversal regulation of headrest under the drive division about drive division drives with the front and back, can satisfy user's different position demands from this, and can promote the comfort level that the headrest used. In addition, the middle support 2, the sliding support 3, the upper and lower driving parts, the front and rear driving parts and the like are arranged in the shell 1 of the headrest, so that the headrest adjusting driving structure and the like can be prevented from being arranged in a seat back, the headrest mounting process can be simplified, the assembly difficulty can be reduced, the assembly cost can be reduced, the headrest mounting efficiency can be improved, and a better using effect can be achieved.

Example two

The embodiment relates to a vehicle, and the seat headrest assembly is arranged on a seat of the vehicle. Meanwhile, as a further preferable embodiment, the vehicle of the present embodiment is further provided with a collision detection unit and a control unit. The collision detection unit is used for acquiring a collision signal of the vehicle and transmitting the collision signal to the control unit, and the control unit is used for controlling the front and rear driving part to act so as to enable the seat headrest assembly to be close to the head of an occupant.

It should be noted that the collision detection unit of the present embodiment may specifically employ radar or other sensing components capable of detecting an imminent collision of the vehicle. The Control Unit of the present embodiment may be an Electronic Control Unit (ECU) in the vehicle. In the vehicle of the embodiment, by adopting the seat headrest assembly of the first embodiment and the collision detection unit and the control unit, the headrest can be close to the head of the occupant when the vehicle collides, so that the head and neck of the occupant can be better protected during collision.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. A vehicle, characterized by;

a seat headrest assembly is arranged on a seat of the vehicle, and the seat headrest assembly comprises a headrest rod (4), a middle support (2), a sliding support (3) and a shell (1);

one end of the headrest rod (4) is arranged in the middle bracket (2) in a vertically sliding manner;

the sliding support (3) is arranged in the middle support (2) in a front-back sliding manner, and a first front-back limiting structure (303) positioned on one side of the middle support (2) is arranged on the sliding support (3);

the middle bracket (2) is provided with an upper driving part, a lower driving part and a front driving part and a rear driving part;

the upper and lower driving parts are in transmission connection with the headrest rod (4) and used for driving the middle support (2) to slide up and down along the headrest rod (4), the upper and lower driving parts adopt upper and lower driving motors (6), the upper and lower driving motors (6) are in transmission connection with the headrest rod (4) through upper and lower transmission structures, each upper and lower transmission structure comprises an upper and lower transmission rack (41) and an upper and lower transmission gear (62), the upper and lower transmission racks (41) are meshed with each other, the upper and lower transmission racks (41) are arranged on the headrest rod (4), a first driving rod (61) is arranged at the driving end of each upper and lower driving motor (6), the upper and lower transmission gears (62) are arranged on the first driving rods (61), an upper limiting structure and a lower limiting structure are arranged at one end of each upper and lower transmission rack (41), an upper limiting part (100) and a lower limiting part (200) which are arranged up and down are arranged on the middle support (2), and the upper limiting part (100) and the lower limiting part (200) are used for respectively abutting against the upper and lower limiting stroke of the middle support (2);

the upper limiting structure and the lower limiting structure comprise limiting end faces (411) positioned at the end parts of the upper transmission rack and the lower transmission rack (41) and limiting clamping jaws (413) arranged on the side faces of the end parts of the upper transmission rack and the lower transmission rack (41), and the upper limiting part (100) and the lower limiting part (200) are limiting plates (1022) arranged on the middle support (2); when the headrest is at the lowest position, the limit end surface (411) is abutted against the upper limit part (100), and when the headrest is at the highest position, the limit clamping jaw (413) is abutted against the lower limit part (200);

the front and rear driving part is in transmission connection with the sliding support (3) and is used for driving the sliding support (3) to slide back and forth relative to the middle support (2); a sliding cavity (201) for the sliding support (3) to slide is formed in the middle support (2), a convex rib extending along the sliding direction is arranged on the sliding support (3), and the convex rib is abutted against the inner wall of the sliding cavity (201);

the shell (1) is fixedly connected with the sliding support (3), a second front and rear limiting structure (1024) located on the other side of the middle support (2) is arranged on the shell (1), and the first front and rear limiting structure (303) and the second front and rear limiting structure (1024) are used for being respectively abutted against the middle support (2) to limit the front and rear sliding stroke of the sliding support (3);

the middle bracket (2) and the sliding bracket (3) are accommodated in the shell (1), and the other end of the headrest rod (4) extends out of the shell (1);

the vehicle is provided with a collision detection unit and a control unit, wherein the collision detection unit is used for acquiring a collision signal of the vehicle and transmitting the collision signal to the control unit; the control unit is used for controlling the front and rear driving part to act so as to enable the seat headrest assembly to be close to the head of an occupant.

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

the front and rear driving part adopts a front and rear driving motor (7);

the front and rear driving motors (7) are in transmission connection with the sliding support (3) through front and rear transmission structures.

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

one end of the upper and lower transmission racks (41) is provided with a plug-in connector (414);

clamping protrusions (412) are arranged on the side portions of the upper and lower transmission racks (41);

the end part of the headrest rod (4) of the plug (414) is plugged into the headrest rod (4);

the clamping protrusion (412) is clamped in a clamping hole (401) in the side portion of the headrest rod (4).

4. The vehicle according to claim 2, characterized in that:

the front and rear transmission structure comprises a front and rear transmission rack (301) and a front and rear transmission gear (72) which are meshed with each other;

the front and rear transmission racks (301) are arranged on the sliding support (3);

the driving end of the front and rear driving motor (7) is provided with a second driving rod (71), and the front and rear transmission gears (72) are arranged on the second driving rod (71).

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

a first anti-backlash part is arranged between the middle bracket (2) and the headrest rod (4); and/or the presence of a gas in the atmosphere,

a second gap eliminating part is arranged between the middle bracket (2) and the sliding bracket (3);

the first gap eliminating part is used for eliminating a movement gap between the middle bracket (2) and the headrest rod (4);

the second gap eliminating part is used for eliminating a movement gap between the middle bracket (2) and the sliding bracket (3).

6. The vehicle according to claim 5, characterized in that:

the first gap eliminating part comprises a first elastic sheet (5) arranged on the middle bracket (2);

a rubber block (51) is arranged on the first elastic sheet (5);

the rubber block (51) is in sliding contact with the headrest rod (4).

7. The vehicle according to claim 5, characterized in that:

the second gap eliminating part comprises a second elastic sheet (8) arranged on the middle bracket (2);

the second elastic sheet (8) is abutted against the sliding support (3).

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

the shell (1) comprises a front shell (101) and a rear shell (102) which are buckled together;

the front shell (101) and the rear shell (102) are fixedly connected to the sliding support (3) respectively.

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