Integrated manual four-direction adjusting seat headrest mechanism

Abstract

The utility model discloses an integrated manual four-direction adjusting seat headrest mechanism which is characterized in that a plurality of clamping grooves are formed in a headrest rod at intervals, a headrest framework comprises a core piece base, a strip-shaped hole extending in the X direction is formed in the bottom end of a headrest shell, and the headrest rod penetrates through the strip-shaped hole to be inserted into the core piece base and is in clearance fit with the core piece base. A locking push plate is arranged on the core piece base in a Y-direction sliding mode, a locking pin is arranged on the locking push plate, the locking pin is clamped in a clamping groove, with the corresponding height, in the headrest rod, one end of the locking push plate is connected with a button assembly, a return spring is arranged between the locking push plate and the core piece base, a movable piece is arranged on the core piece base in an X-direction sliding mode, and the movable piece is connected with the button assembly. The headrest shell is fixedly connected with the movable part, and an X-direction locking assembly used for limiting front-back sliding of the movable part is arranged on the locking push plate. When the button assembly is pressed, the headrest mechanism can be unlocked in the Y direction and the X direction at the same time. The device is convenient to operate, simple in structure and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle seats, and particularly relates to an integrated manual four-way adjustable seat headrest mechanism. Background Art

[0002] With the progress of the economic society and the development of the automotive industry, people's requirements for the comfort and safety of vehicle seats have gradually increased. As a core component of vehicle seats, the seat headrest is not only required to have high comfort, but also required to have the function of protecting the head. However, different people have different body shapes and postures. Therefore, the traditional vehicle seat headrest that can only achieve up-and-down height adjustment cannot meet people's requirements for comfort and safety. Thus, a four-way adjustable headrest with up-and-down lifting and front-and-back adjustment functions has emerged in the market.

[0003] For the existing four-way adjustable headrest with up-and-down and front-and-back adjustment functions, its four-way adjustment mechanism not only has a complex structure (especially the component structure for locking the front-and-back adjustment of the headrest is extremely complex), many components, and low reliability, but also has a long unlocking stroke, poor reliability, and insufficient practicability. Summary of the Utility Model

[0004] Aiming at the problems existing in the above-mentioned prior art, the utility model aims to provide an integrated manual four-way adjustable seat headrest mechanism to solve the problems of the complex internal structure and low reliability of the existing four-way adjustable headrest.

[0005] To achieve the above object, the utility model provides an integrated manual four-way adjustable seat headrest mechanism, which includes a headrest rod, a headrest housing, and a headrest skeleton arranged inside the headrest housing. A plurality of card slots are arranged at intervals on the headrest rod. The headrest skeleton includes a core component base. A strip-shaped hole extending in the X direction is provided at the bottom end of the headrest housing. The headrest rod passes through the strip-shaped hole and is inserted into the core component base, and is in clearance fit with the core component base. A locking push plate is slidably arranged in the Y direction on the core component base. A locking pin is arranged on the locking push plate. The locking pin is clamped in the card slot at the corresponding height on the headrest rod. One end of the locking push plate is connected with a button assembly. A return spring is arranged between the locking push plate and the core component base. An active component is slidably arranged in the X direction on the core component base. The headrest housing is fixedly connected with the active component. An X-direction locking component for restricting the front-and-back sliding of the active component is arranged on the locking push plate;

[0006] Pressing the button assembly can drive the locking push plate to move in the Y direction, so that the locking pin disengages from the card slot, thereby enabling the core component base to drive the headrest housing to move in the Z direction to realize the Z-direction adjustment of the headrest mechanism. When the locking push plate moves in the Y direction, it can also drive the X-direction locking component to unlock, so that the headrest housing can move in the X direction relative to the core component base to realize the X-direction adjustment of the headrest mechanism.

[0007] In the above solution: the X-direction locking component includes a locking tongue arranged in the Z direction. The lower end of the locking tongue movably passes through the locking push plate. An inclined slot penetrating in the X direction is provided at the lower end of the locking tongue. A locking pin is movably inserted in the inclined slot. Both ends of the locking pin are fixed on the locking push plate. A rack extending in the X direction is provided on the moving part. The upper end of the locking tongue is engaged in the rack. A return spring is provided between the locking tongue and the core part base. When the locking push plate moves in the Y direction, the locking pin can move along the inclined slot so that the locking tongue moves downward and separates from the rack, thereby unlocking the X-direction locking component and enabling the headrest mechanism to be adjusted in the X direction. That is, pressing the button assembly can simultaneously unlock the Z direction and the X direction of the headrest mechanism, and the X-direction locking component has a simple structure and ingenious design. After releasing the button assembly, both the locking push plate and the locking tongue can be reset under the action of the corresponding return spring to achieve locking in the Z direction and the X direction again.

[0008] In the above solution: the button assembly includes an unlocking button and a rotating push plate. The unlocking button is embedded in the headrest housing. The middle part of the rotating push plate is hinged to the inner wall of the headrest housing through a rotating shaft. The upper end of the rotating push plate is in contact connection with the unlocking button, and the lower end of the rotating push plate is in contact connection with the locking push plate. Pressing the unlocking button can drive the rotating push plate to rotate, thereby driving the locking push plate to move in the Y direction. This structure adds a rotating push plate between the unlocking button and the locking push plate, converting the rotational movement of the rotating push plate into the Y-direction movement of the locking push plate, with an ingenious design, making the pressing direction opposite to the moving direction of the locking push plate, which is beneficial to saving the Y-direction movement space. More importantly, the traditional connection method is that the locking push plate is in direct contact with the button assembly. The locking push plate does not move back and forth, and the button assembly moves back and forth with the headrest housing. When the headrest housing needs to move a large distance in the X direction, since the design dimensions of the button assembly are mostly fixed specifications, the position of the locking push plate for contacting the button assembly needs to be made very large to meet the requirements. The headrest housing moves back and forth relative to the internal locking push plate, so the internal X-direction space of the headrest housing needs to be made very large. After adding the rotating push plate, the position of the rotating push plate for contacting the locking push plate can be made larger, and the locking push plate can be made relatively smaller, thereby relatively reducing the internal X-direction space of the headrest housing. Therefore, this structure can save more X-direction space in the case of a large stroke.

[0009] In the above solution: there are two headrest rods arranged side by side. Locking pins corresponding to each headrest rod are provided on the locking push plate. The locking pins are integrally injection-molded with the locking push plate. Limiting slots extending in the Y direction are provided on the core part base corresponding to each headrest rod. Limiting pins are movably inserted in the limiting slots. The limiting pins are fixed on the corresponding headrest rods, and the movement stroke of the headrest in the up and down direction is limited by the cooperation of the limiting pins and the limiting slots.

[0010] In the above solution: the limiting pin is formed by curling a sheet body. A pin hole is provided on the headrest rod. The limiting pin is in interference fit in the pin hole, with a simple structure and convenient operation.

[0011] In the above scheme, a spring sheet is fixed on the core component base, and the spring sheet is located between the core component base and the movable component, so as to absorb tolerance and eliminate gap.

[0012] In the above scheme: a clamping groove is provided on the core component base near the headrest rod, a compensation block is inserted in the clamping groove, a hollow portion is provided at the side end of the clamping groove, the outer circle of the headrest rod protrudes into the clamping groove through the hollow portion, and the compensation block is expanded between the inner wall of the clamping groove and the outer circle of the headrest rod to absorb the tolerance between the headrest rod and the core component base, so as to prevent the core component base from shaking relative to the headrest rod.

[0013] In the above solution: the clamping groove is arranged perpendicular to the headrest rod, so as to ensure the effect of the compensation block absorbing the tolerance.

[0014] In the above scheme: the clamping groove runs through along the X direction, and a connecting rib is provided between the upper and lower inner walls of the clamping groove, and the connecting rib divides the clamping groove into left and right halves, and the left and right sides of the connecting rib are provided with guide grooves extending in the X direction; the two sides of the compensation block are arched outward to form an extrusion edge, and a protrusion matching the guide groove is provided on the inner wall of the extrusion edge, and a U-shaped opening opening facing backward is provided in the middle of the compensation block, and the compensation block is clamped on the connecting rib through the U-shaped opening, and the protrusion is inserted into the corresponding side guide groove, and the two extrusion edges are respectively abutted against the inner wall of the clamping groove and the outer circle of the headrest rod. The compensation block structure is cleverly designed and has a certain deformation ability.

[0015] In the above scheme: the rear end of the compensation block is provided with an anti-detachment hook, and the anti-detachment hook can be hooked on the rear end surface of the connecting rib to prevent the compensation block from detaching.

[0016] The beneficial effects of the utility model are:

[0017] When the locking push plate moves in the Y direction, it can drive the locking pin to disengage from the card slot, and at the same time drive the X-direction locking assembly to unlock. The locking push plate is connected to the button assembly, that is, by pressing the button assembly, the headrest mechanism can be unlocked in the Z direction and the X direction at the same time, so that the headrest can be adjusted to a suitable up and down and front and back position to ensure the comfort and safety of the occupant. In short, the utility model is easy to operate, can realize four-way unlocking at the same time, has high locking stability, short unlocking stroke, fewer parts, simple internal structure, and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a schematic diagram of the external structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the internal structure of the present utility model.

[0021] Figure 3 It is a plan view of the locking push plate.

[0022] Figure 4 It is a connection diagram of the core part base and the movable part.

[0023] Figure 5 It is a transmission diagram of the locking push plate.

[0024] Figure 6 It is a cross-sectional view of the X-direction locking component.

[0025] Figure 7 It is a schematic diagram of the structure of the lock tongue.

[0026] Figure 8 It is Figure 2 An enlarged schematic diagram at position M in

[0027] Figure 9 It is a cross-sectional view of the clamping groove.

[0028] Figure 10 It is a schematic diagram of the compensation block abutting against the headrest rod.

[0029] Figure 11 It is a schematic diagram of the structure of the compensation block. Detailed implementation manners

[0030] As Figure 1 shown in Fig. 11, an integrated manual four-way adjustable seat headrest mechanism mainly consists of a headrest rod 1, a headrest outer shell 2 and a headrest skeleton arranged inside the headrest outer shell 2. A plurality of card slots are arranged on the headrest rod 1 at intervals along the Z direction.

[0031] The headrest skeleton includes a core part base 3. A strip-shaped hole extending in the X direction is provided at the bottom end of the headrest outer shell 2. The headrest rod 1 passes through the strip-shaped hole and is inserted into the core part base 3, and is in clearance fit with the core part base 3. A locking push plate 4 is slidably arranged in the Y direction on the core part base 3. A locking pin 41 is arranged on the locking push plate 4, and the locking pin 41 is clamped in the card slot at the corresponding height on the headrest rod 1. One end of the locking push plate 4 is connected with a button assembly A, and a return spring 5 is arranged between the locking push plate 4 and the core part base 3. A movable part 6 is slidably arranged in the X direction on the core part base 3. The headrest outer shell 2 is fixedly connected with the movable part 6. An X-direction locking component B for restricting the front and back sliding of the movable part 6 is arranged on the locking push plate 4.

[0032] Pressing the button assembly A can drive the locking push plate 4Y to move, causing the locking pin 41 to disengage from the card slot, so that the core part base 3 can drive the headrest outer shell 2 to move in the Z direction, realizing the Z-direction adjustment of the headrest mechanism. When the locking push plate 4Y moves, it can also drive the X-direction locking component B to unlock, enabling the headrest outer shell 2 to move in the X direction relative to the core part base 3, realizing the X-direction adjustment of the headrest mechanism.

[0033] The Z direction refers to the up and down direction of the seat, the Y direction refers to the left and right direction of the seat, and the X direction refers to the front and back direction of the seat.

[0034] Preferably, the X-direction locking component B includes a locking tongue 7 arranged in the Z direction. The lower end of the locking tongue 7 passes through the locking push plate 4 movably. The lower end of the locking tongue 7 is provided with an inclined slot penetrating in the X direction, and a locking pin 8 is movably inserted in the inclined slot. Both ends of the locking pin 8 are fixed on the locking push plate 4. The movable part 6 is provided with a rack extending in the X direction, and the upper end of the locking tongue 7 is engaged in the rack. A return spring 5 is arranged between the locking tongue 7 and the core part base 3. When the locking push plate 4 moves in the Y direction, the locking pin 8 can move along the inclined slot to make the locking tongue 7 move downward and separate from the rack, thus realizing the unlocking of the X-direction locking component B and enabling the headrest mechanism to perform X-direction adjustment. That is, pressing the button assembly A can simultaneously realize the Z-direction and X-direction unlocking of the headrest mechanism, and the X-direction locking component B has a simple structure and ingenious design. After releasing the button assembly A, both the locking push plate 4 and the locking tongue 7 can be reset under the action of the corresponding return spring 5, realizing the Z-direction and X-direction locking again.

[0035] Preferably, the button assembly A includes an unlocking button 9 and a rotating push plate 10. The unlocking button 9 is embedded in the headrest housing 2. The middle part of the rotating push plate 10 is hinged to the inner wall of the headrest housing 2 through a rotating shaft. The upper end of the rotating push plate 10 is in contact connection with the unlocking button 9, and the lower end of the rotating push plate 10 is in contact connection with the locking push plate 4. Pressing the unlocking button 9 can drive the rotating push plate 10 to rotate, thereby driving the locking push plate 4 to move in the Y direction. By adding the rotating push plate 10 between the unlocking button 9 and the locking push plate 4 in this structure, the rotational movement of the rotating push plate 10 is converted into the Y-direction movement of the locking push plate 4. The design is ingenious, making the pressing direction opposite to the moving direction of the locking push plate 4, which is beneficial to saving the Y-direction movement space. More importantly, in the traditional connection method, the locking push plate 4 is in direct contact with the button assembly A. The locking push plate 4 does not move back and forth, and the button assembly A moves back and forth with the headrest housing 2. When the headrest housing 2 needs to move a large distance in the X direction, since the design dimensions of the button assembly A are mostly fixed specifications, the position of the locking push plate 4 for contacting the button assembly A has to be made very large to meet the requirements. The headrest housing 2 moves back and forth relative to the internal locking push plate 4, so the internal X-direction space of the headrest housing 2 needs to be made very large. After adding the rotating push plate 10, the position of the rotating push plate 10 for contacting the locking push plate 4 can be made larger, and the locking push plate 4 can be made relatively smaller, so that the internal X-direction space of the headrest housing 2 can be relatively reduced. Therefore, this structure can save more X-direction space in the case of a large stroke.

[0036] Preferably, there are two headrest rods 1 arranged side by side. A locking pin 41 is provided on the locking push plate 4 corresponding to each headrest rod 1. The locking pin 41 is integrally injection-molded with the locking push plate 4. A Y-direction extending limiting groove 31 is provided on the core part base 3 corresponding to each headrest rod 1. A limiting pin 11 is movably inserted in the limiting groove 31. The limiting pin 11 is fixed on the corresponding headrest rod 1. The up-and-down movement stroke of the headrest is limited by the cooperation of the limiting pin 11 and the limiting groove 31.

[0037] Preferably, the limiting pin 11 is formed by rolling a sheet body. A pin hole is provided on the headrest rod 1. The limiting pin 11 is press-fitted in the pin hole. The structure is simple and the operation is convenient.

[0038] Preferably, a spring piece 13 is fixed on the core part base 3. The spring piece 13 is located between the core part base 3 and the movable part 6. It functions to absorb tolerances and eliminate gaps.

[0039] Preferably, a clamping groove 32 is provided on the core part base 3 near the headrest rod 1. A compensation block 12 is inserted in the clamping groove 32. A hollow part is provided at the side end of the clamping groove 32. The outer circle of the headrest rod 1 protrudes into the clamping groove 32 through the hollow part. The compensation block 12 expands between the inner wall of the clamping groove 32 and the outer circle of the headrest rod 1 to absorb the tolerance between the headrest rod 1 and the core part base 3 and prevent the core part base 3 from shaking relative to the headrest rod 1.

[0040] Preferably, the snap groove 32 is arranged perpendicular to the headrest rod 1, which is beneficial to ensuring the effect of the compensation block 12 absorbing tolerances.

[0041] Preferably, the snap groove 32 runs through in the X direction. A connecting rib a is provided between the upper and lower inner walls of the snap groove 32. The connecting rib a divides the snap groove 32 into left and right halves. Guide grooves b extending in the X direction are provided on both sides of the connecting rib a. Both sides of the compensation block 12 bulge outwards to form extrusion edges c. Protrusions d matching the guide grooves b are provided on the inner walls of the extrusion edges c. A U-shaped opening e with an opening facing backwards is provided in the middle of the compensation block 12. The compensation block 12 is clamped on the connecting rib a through the U-shaped opening e. The protrusions d are inserted into the corresponding guide grooves b. The two extrusion edges c respectively abut against the inner wall of the snap groove 32 and the outer circumference of the headrest rod 1. The compensation block 12 is ingeniously designed in structure and has a certain deformation ability.

[0042] Preferably, an anti-detachment barb f is provided at the rear end of the compensation block 12. The anti-detachment barb f can be hooked on the rear end face of the connecting rib a to prevent the compensation block 12 from coming off.

Claims

1. An integrated manual four-way adjustable seat headrest mechanism, comprising a headrest rod (1), a headrest housing (2) and a headrest skeleton arranged inside the headrest housing (2). A plurality of card slots are arranged at intervals on the headrest rod (1), and it is characterized in that: The headrest skeleton includes a core component base (3). The bottom end of the headrest outer shell (2) is provided with a strip-shaped hole extending in the X direction. The headrest rod (1) passes through the strip-shaped hole and is inserted into the core component base (3), and is in clearance fit with the core component base (3). A locking push plate (4) is slidably arranged in the Y direction on the core component base (3). A locking pin (41) is provided on the locking push plate (4). The locking pin (41) is clamped in a card slot at a corresponding height on the headrest rod (1). One end of the locking push plate (4) is connected to a button assembly (A). A return spring (5) is arranged between the locking push plate (4) and the core component base (3). An active component (6) is slidably arranged in the X direction on the core component base (3). The headrest outer shell (2) is fixedly connected to the active component (6). An X-direction locking assembly (B) for restricting the forward and backward sliding of the active component (6) is provided on the locking push plate (4); Pressing the button assembly (A) can drive the locking push plate (4) to move in the Y direction, so that the locking pin (41) disengages from the card slot, so that the core component base (3) can drive the headrest outer shell (2) to move in the Z direction, realizing the Z-direction adjustment of the headrest mechanism. When the locking push plate (4) moves in the Y direction, it can also drive the X-direction locking assembly (B) to unlock, so that the headrest outer shell (2) can move in the X direction relative to the core component base (3), realizing the X-direction adjustment of the headrest mechanism.

2. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, wherein: The X-direction locking assembly (B) includes a locking tongue (7) arranged in the Z direction. The lower end of the locking tongue (7) movably passes through the locking push plate (4). An inclined slot penetrating in the X direction is provided at the lower end of the locking tongue (7). A locking pin (8) is movably inserted in the inclined slot. Both ends of the locking pin (8) are fixed on the locking push plate (4). A rack extending in the X direction is provided on the active component (6). The upper end of the locking tongue (7) is engaged in the rack. A return spring (5) is arranged between the locking tongue (7) and the core component base (3); when the locking push plate (4) moves in the Y direction, the locking pin (8) can move along the inclined slot to make the locking tongue (7) move downward and separate from the rack, thereby realizing the unlocking of the X-direction locking assembly (B), so that the headrest mechanism can be adjusted in the X direction.

3. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, characterized in that: The button assembly (A) includes an unlocking button (9) and a rotating push plate (10). The unlocking button (9) is embedded in the headrest outer shell (2). The middle part of the rotating push plate (10) is hinged to the inner wall of the headrest outer shell (2) through a rotating shaft. The upper end of the rotating push plate (10) is in contact connection with the unlocking button (9). The lower end of the rotating push plate (10) is in contact connection with the locking push plate (4). Pressing the unlocking button (9) can drive the rotating push plate (10) to rotate, thereby driving the locking push plate (4) to move in the Y direction.

4. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, characterized in that: There are two headrest rods (1) arranged side by side. A locking pin (41) is provided on the locking push plate (4) corresponding to each headrest rod (1). The locking pin (41) and the locking push plate (4) are integrally injection-molded. A limiting slot (31) extending in the Y direction is provided on the core component base (3) corresponding to each headrest rod (1). A limiting pin (11) is movably inserted in the limiting slot (31). The limiting pin (11) is fixedly arranged on the corresponding headrest rod (1).

5. The integrated manual four-way adjustable seat headrest mechanism according to claim 4, wherein: The limiting pin (11) is formed by rolling a sheet body, and a pin hole is provided on the headrest rod (1). The limiting pin (11) is in interference fit in the pin hole.

6. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, characterized in that: A spring piece (13) is fixedly arranged on the core part base (3), and the spring piece (13) is located between the core part base (3) and the movable part (6).

7. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, characterized in that: A clamping groove (32) is arranged on the core part base (3) near the headrest rod (1). A compensation block (12) is inserted in the clamping groove (32). A hollow part is arranged at the side end of the clamping groove (32). The outer circle of the headrest rod (1) protrudes into the clamping groove (32) through the hollow part. The compensation block (12) is expanded between the inner wall of the clamping groove (32) and the outer circle of the headrest rod (1).

8. The integrated manual four-way adjustable seat headrest mechanism according to claim 7, characterized in that: The clamping groove (32) is arranged perpendicular to the headrest rod (1).

9. The integrated manual four-way adjustable seat headrest mechanism according to claim 8, characterized in that: The clamping groove (32) runs through along the X direction. A connecting rib (a) is arranged between the upper and lower inner walls of the clamping groove (32). The connecting rib (a) divides the clamping groove (32) into left and right halves. Guide grooves (b) extending in the X direction are arranged on both sides of the connecting rib (a). Both sides of the compensation block (12) bulge outwards to form extrusion edges (c). A protrusion (d) matching the guide groove (b) is arranged on the inner wall of the extrusion edge (c). A U-shaped opening (e) with an opening facing backwards is arranged in the middle of the compensation block (12). The compensation block (12) is clamped on the connecting rib (a) through the U-shaped opening (e). The protrusion (d) is inserted in the corresponding guide groove (b). Both extrusion edges (c) are respectively abutted against the inner wall of the clamping groove (32) and the outer circle of the headrest rod (1).

10. The integrated manual four-way adjustable seat headrest mechanism according to claim 9, characterized in that: An anti-detachment barb (f) is arranged at the rear end of the compensation block (12).

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