Integrated manual seat headrest mechanism capable of being adjusted in four directions

Abstract

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 internal structure and high in reliability.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to an integrated manual four-way adjustable seat headrest mechanism. Background Art

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

[0003] The existing four-way adjustable headrest with up and down and front and back adjustment functions has a four-way adjustment mechanism that is not only complex in structure (especially the component structure of locking the headrest for front and back adjustment is extremely complex), has many parts and components, and is not reliable, but also has a long unlocking stroke, poor reliability, and insufficient practicality. Summary of the invention

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

[0005] In order to achieve the above-mentioned object, the present invention proposes an integrated manual four-way adjustable seat headrest mechanism, comprising a headrest rod, a headrest shell and a headrest frame arranged inside the headrest shell, the headrest rod being provided with a plurality of slots at intervals, the headrest frame comprising a core component base, the bottom end of the headrest shell being provided with a strip hole extending in the X direction, the headrest rod passing through the strip hole and inserted into the core component base, and having a clearance fit with the core component base, a locking thrust plate being provided on the core component base for sliding in the Y direction, a locking pin being provided on the locking thrust plate, the locking pin being clamped in a slot of corresponding height on the headrest rod, one end of the locking thrust plate being connected with a button assembly, a return spring being provided between the locking thrust plate and the core component base, a movable part being provided for sliding in the X direction on the core component base, the headrest shell being fixedly connected to the movable part, and an X-direction locking assembly for limiting the movable part from sliding forward and backward is provided on the locking thrust 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 slot, so that the core component base can drive the headrest shell to move in the Z direction, thereby realizing 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 shell can move in the X direction relative to the core component base, thereby realizing the X-direction adjustment of the headrest mechanism.

[0007] In the above scheme: the X-axis locking assembly includes a lock tongue arranged in the Z direction, the lower end of the lock tongue movably passes through the locking push plate, the lower end of the lock tongue is provided with an oblique groove penetrating in the X direction, a lock pin is movably inserted in the oblique groove, both ends of the lock pin are fixed to the locking push plate, the movable part is provided with a rack extending in the X direction, the upper end of the lock tongue is engaged in the rack, and a return spring is provided between the lock tongue and the core component base; when the locking push plate moves in the Y direction, the lock pin can move along the oblique groove so that the lock tongue moves down and separates from the rack, thereby realizing the unlocking of the X-axis locking assembly, so that the headrest mechanism can be adjusted in the X direction; 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, and the X-axis locking assembly has a simple structure and a clever design. After releasing the button assembly, the locking push plate and the lock tongue can be reset under the action of the corresponding return springs, thereby realizing re-locking in the Z direction and the X direction.

[0008] In the above scheme: the button assembly includes an unlocking button and a rotating push plate, the unlocking button is embedded on the headrest shell, the middle part of the rotating push plate is hinged on the inner wall of the headrest shell through a rotating shaft, the upper end of the rotating push plate is in contact with the unlocking button, and the lower end of the rotating push plate is in contact 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 converts the rotational motion of the rotating push plate into the Y-direction movement of the locking push plate by adding a rotating push plate between the unlocking button and the locking push plate. The design is ingenious, so that the pressing direction is opposite to the moving direction of the locking push plate, which is conducive 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 forward or backward, and the button assembly moves forward and backward with the headrest shell. When the headrest shell needs to meet a larger stroke in the X-direction, since the design dimensions of the button assembly are mostly fixed specifications, the position where the locking push plate is used to contact the button assembly must be made very large to meet the requirements. The headrest shell moves forward and backward relative to the locking push plate inside, so the internal X-direction space of the headrest shell needs to be made very large; after adding a rotating push plate, the position where the rotating push plate is used to contact the locking push plate can be made larger, and the locking push plate can be made relatively small, thereby relatively reducing the internal X-direction space of the headrest shell. Therefore, under large stroke conditions, this structure can save more X-direction space.

[0009] In the above scheme: the headrest rods are two arranged side by side, the locking push plate is provided with a locking pin corresponding to each headrest rod, the locking pin and the locking push plate are integrally injection molded, and the core component base is provided with a limit groove extending in the Y direction corresponding to each headrest rod, a limit pin is movably inserted in the limit groove, and the limit pin is fixed on the corresponding headrest rod, and the upper and lower movement stroke of the headrest is limited by the cooperation of the limit pin and the limit groove.

[0010] In the above scheme: the limit pin is rolled up from a sheet, the headrest rod is provided with a pin hole, the limit pin is interference fit in the pin hole, the structure is simple, and the operation is convenient.

[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 present invention 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 present invention 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 present invention.

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

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

[0022] Figure 4 It is a connection diagram between the core component base and the movable parts.

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

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

[0025] Figure 7 It is a structural diagram of a lock tongue.

[0026] Figure 8 yes Figure 2 Enlarged schematic diagram of point M in the middle.

[0027] Fig. 9 It is a cross-sectional view of the card slot.

[0028] Fig.10 It is a schematic diagram of the abutment between the compensation block and the headrest rod.

[0029] Fig.11 It is a structural diagram of the compensation block. DETAILED DESCRIPTION

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

[0031] The headrest frame includes a core component base 3, a strip hole extending in the X direction is provided at the bottom end of the headrest shell 2, and the headrest rod 1 is inserted into the core component base 3 through the strip hole and is in clearance fit with the core component base 3. A locking thrust plate 4 is provided on the core component base 3 for sliding in the Y direction, and a locking pin 41 is provided on the locking thrust plate 4, and the locking pin 41 is clamped in a slot of corresponding height on the headrest rod 1; a button assembly A is connected to one end of the locking thrust plate 4, and a return spring 5 is provided between the locking thrust plate 4 and the core component base 3. A movable part 6 is provided on the core component base 3 for sliding in the X direction, and the headrest shell 2 is fixedly connected to the movable part 6, and an X-direction locking component B for limiting the sliding of the movable part 6 forward and backward is provided on the locking thrust plate 4.

[0032] 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 slot, thereby enabling the core component base 3 to drive the headrest shell 2 to move in the Z direction, thereby 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 component B to unlock, so that the headrest shell 2 can move in the X direction relative to the core component base 3, thereby 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 assembly B comprises a locking tongue 7 arranged in the Z direction, the lower end of the locking tongue 7 movably passes through the locking thrust plate 4, the lower end of the locking tongue 7 is provided with an oblique groove penetrating in the X direction, a locking pin 8 is movably inserted in the oblique groove, and both ends of the locking pin 8 are fixed on the locking thrust plate 4. A rack extending in the X direction is provided on the movable member 6, the upper end of the locking tongue 7 is engaged in the rack, and a return spring 5 is provided between the locking tongue 7 and the core member base 3. When the locking thrust plate 4 moves in the Y direction, the locking pin 8 can move along the oblique groove so that the locking tongue 7 moves downward and separates 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; that is, by pressing the button assembly A, the headrest mechanism can be unlocked in the Z direction and the X direction at the same time, and the X-direction locking assembly B has a simple structure and a clever design. After releasing the button assembly A, the locking thrust plate 4 and the locking tongue 7 can be reset under the action of the corresponding return spring 5, so as to realize the re-locking in the Z direction and the X direction.

[0035] Preferably, the button assembly A includes an unlocking button 9 and a rotating push plate 10, wherein the unlocking button 9 is embedded in the headrest housing 2, the middle portion 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 with the unlocking button 9, and the lower end of the rotating push plate 10 is in contact 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. This structure converts the rotational motion of the rotating push plate 10 into the Y-direction movement of the locking push plate 4 by adding the rotating push plate 10 between the unlocking button 9 and the locking push plate 4. The design is ingenious, so that the pressing direction is opposite to the moving direction of the locking push plate 4, which is conducive to saving the Y-direction movement space. More importantly, the traditional connection method is that the locking push plate 4 is in direct contact with the button assembly A, the locking push plate 4 does not move forward or backward, and the button assembly A moves forward and backward with the headrest shell 2. When the headrest shell 2 needs to move in the X direction to meet a larger stroke, since the design size of the button assembly A is mostly fixed specifications, the position where the locking push plate 4 is used to contact the button assembly A must be made very large to meet the requirements. The headrest shell 2 moves forward and backward relative to the locking push plate 4 inside, so the internal X-direction space of the headrest shell 2 needs to be made very large; after adding the rotating push plate 10, the position where the rotating push plate 10 is used to contact the locking push plate 4 can be made larger, and the locking push plate 4 can be made relatively small, thereby relatively reducing the internal X-direction space of the headrest shell 2. Therefore, under large stroke conditions, this structure can save more X-direction space.

[0036] Preferably, there are two headrest rods 1 arranged side by side, and 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, and a limit groove 31 extending in the Y direction is provided on the core component base 3 corresponding to each headrest rod 1. A limit pin 11 is movably inserted in the limit groove 31, and the limit pin 11 is fixed on the corresponding headrest rod 1. The limit pin 11 cooperates with the limit groove 31 to limit the upward and downward movement of the headrest.

[0037] Preferably, the limiting pin 11 is formed by rolling a sheet, a pin hole is provided on the headrest rod 1, and the limiting pin 11 is interference-fitted in the pin hole, which has a simple structure and is easy to operate.

[0038] Preferably, a spring sheet 12 is fixedly disposed on the core base 3, and the spring sheet 12 is located between the core base 3 and the movable member 6, so as to absorb tolerance and eliminate gap.

[0039] Preferably, a snap-in groove 32 is provided on the core component base 3 near the headrest rod 1, a compensation block 12 is inserted into the snap-in groove 32, a side end of the snap-in groove 32 is provided with a hollow portion, the outer circle of the headrest rod 1 protrudes into the snap-in groove 32 through the hollow portion, and the compensation block 12 is expanded between the inner wall of the snap-in groove 32 and the outer circle of the headrest rod 1 to absorb the tolerance between the headrest rod 1 and the core component base 3, thereby preventing the core component base 3 from shaking relative to the headrest rod 1.

[0040] Preferably, the engaging groove 32 is arranged perpendicular to the headrest rod 1, so as to help ensure the effect of the compensation block 12 in absorbing tolerance.

[0041] Preferably, the clamping groove 32 is penetrated along the X direction, and a connecting rib a is provided between the upper and lower inner walls of the clamping groove 32, the connecting rib a divides the clamping groove 32 into two halves, and the left and right sides of the connecting rib a are provided with guide grooves b extending in the X direction; the two sides of the compensation block 12 are arched outward to form an extrusion edge c, and a protrusion d matching the guide groove b is provided on the inner wall of the extrusion edge c, and a U-shaped opening e is provided in the middle of the compensation block 12, and the compensation block 12 is clamped on the connecting rib a through the U-shaped opening e, and the protrusion d is inserted into the corresponding side guide groove b, and the two extrusion edges c are respectively abutted against the inner wall of the clamping groove 32 and the outer circle of the headrest rod 1. The compensation block 12 has an ingenious structural design and has a certain deformation ability.

[0042] Preferably, the rear end of the compensation block 12 is provided with an anti-detachment hook f, which can be hooked on the rear end surface of the connecting rib a to prevent the compensation block 12 from detaching.

Claims

1. An integrated manual four-way adjustable seat headrest mechanism, comprising a headrest rod (1), a headrest shell (2) and a headrest frame arranged inside the headrest shell (2), wherein a plurality of slots are arranged at intervals on the headrest rod (1), characterized in that: The headrest frame comprises a core component base (3), the bottom end of the headrest shell (2) is provided with a strip hole extending in the X direction, the headrest rod (1) passes through the strip hole and is inserted into the core component base (3), and is clearance-matched with the core component base (3), a locking thrust plate (4) is provided on the core component base (3) for sliding in the Y direction, a locking pin (41) is provided on the locking thrust plate (4), and the locking pin (41) is clamped in a clamping groove of a corresponding height on the headrest rod (1), one end of the locking thrust plate (4) is connected with a button assembly (A), a return spring (5) is provided between the locking thrust plate (4) and the core component base (3), a movable part (6) is provided on the core component base (3) for sliding in the X direction, the headrest shell (2) is fixedly connected to the movable part (6), and an X-direction locking component (B) for limiting the forward and backward sliding of the movable part (6) is provided on the locking thrust 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) is disengaged from the slot, thereby enabling the core component base (3) to drive the headrest shell (2) to move in the Z direction, thereby 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 component (B) to unlock, so that the headrest shell (2) can move in the X direction relative to the core component base (3), thereby realizing the X-direction adjustment of the headrest mechanism.

2. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, characterized in that: The X-axis locking assembly (B) comprises a locking tongue (7) arranged in the Z direction, the lower end of the locking tongue (7) movably passes through the locking thrust plate (4), the lower end of the locking tongue (7) is provided with an oblique groove penetrating in the X direction, a locking pin (8) is movably inserted in the oblique groove, both ends of the locking pin (8) are fixed on the locking thrust plate (4), the movable part (6) is provided with a rack extending in the X direction, the upper end of the locking tongue (7) is engaged in the rack, and a return spring (5) is provided between the locking tongue (7) and the core component base (3); when the locking thrust plate (4) moves in the Y direction, the locking pin (8) can move along the oblique groove so that the locking tongue (7) moves downward and separates from the rack, thereby realizing the unlocking of the X-axis 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) comprises an unlocking button (9) and a rotating push plate (10), wherein the unlocking button (9) is embedded in the headrest shell (2), and the middle part of the rotating push plate (10) is hinged to the inner wall of the headrest shell (2) through a rotating shaft, the upper end of the rotating push plate (10) is in contact with and connected to the unlocking button (9), and the lower end of the rotating push plate (10) is in contact with and connected to the locking push plate (4), and 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: The headrest rods (1) are two arranged side by side, and a locking pin (41) is provided on the locking push plate (4) corresponding to each headrest rod (1), and the locking pin (41) and the locking push plate (4) are integrally injection-molded. A limiting groove (31) extending in the Y direction is provided on the core component base (3) corresponding to each headrest rod (1), and a limiting pin (11) is movably inserted in the limiting groove (31), and 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, characterized in that: The limiting pin (11) is rolled from a sheet, and a pin hole is provided on the headrest rod (1), and the limiting pin (11) is interference-fitted in the pin hole.

6. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, characterized in that: A spring sheet (12) is fixedly arranged on the core component base (3), and the spring sheet (12) is located between the core component base (3) and the movable component (6).

7. The integrated manual four-way adjustable seat headrest mechanism according to claim 1, characterized in that: A clamping groove (32) is provided on the core component base (3) near the headrest rod (1), a compensation block (12) is inserted into the clamping groove (32), a hollow portion 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 portion, and 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) penetrates along the X direction, and a connecting rib (a) is provided between the upper and lower inner walls of the clamping groove (32), and the connecting rib (a) divides the clamping groove (32) into two halves, and a guide groove (b) extending in the X direction is provided on the left and right sides of the connecting rib (a); the two sides of the compensation block (12) are arched outward to form an extrusion edge (c), and a protrusion (d) matching the guide groove (b) is provided on the inner wall of the extrusion edge (c), and a U-shaped opening (e) opening backward is provided in the middle of the compensation block (12), and the compensation block (12) is clamped on the connecting rib (a) through the U-shaped opening (e), and the protrusion (d) is inserted into the corresponding side guide groove (b), and the two 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: The rear end of the compensation block (12) is provided with an anti-drop barb (f).

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