Friction positioning headrest for automobile

Abstract

The friction positioning headrest comprises a base and a headrest leaning seat, the headrest leaning seat is connected with the base in a front-back sliding mode through a guide structure, a shell is arranged in the middle of the base, a conical tightening shell, a movable sleeve shell and a spring piece are arranged in the shell, and the rear end of the conical tightening shell abuts against the base; the front end of the conical tightening shell abuts against the base, the headrest leaning seat is provided with a connecting shaft which extends into the shell and penetrates through the conical tightening shell, the conical tightening shell can clamp the connecting shaft through contraction, the outer surface of the conical tightening shell is sleeved with the movable sleeve shell, and the movable sleeve shell can move front and back relative to the shell to tighten or loosen the conical tightening shell. The spring piece abuts against the movable sleeve shell so as to keep the tightening state of the spring piece on the conical tightening shell, and an operation part capable of driving the movable sleeve shell to move is arranged outside the shell. According to the positioning principle adopted by the friction positioning headrest, clamping and fixing are achieved through friction force, the connecting shaft on the headrest leaning seat is contracted and clamped through the conical tightening shell, and therefore the position of the headrest leaning seat is fixed.

Description

Technical Field

[0001] The invention relates to a friction positioning headrest for a vehicle. Background Art

[0002] When using a car seat, the driver or passenger can adjust the seat headrest according to their own needs to make the headrest reach a comfortable position. Currently, traditional car seat headrests mostly adopt a segmented gear buckle structure. When adjusting the headrest, the user can only adjust the headrest according to the set gear. Because of the segmented gear structure, the user's options when adjusting the headrest position are limited, and it is easy for the actual position of the headrest to be adjusted to be between two gears, which makes the user unable to adjust the headrest to the most comfortable position. Summary of the invention

[0003] The purpose of the present invention is to overcome the above problems. We provide a friction positioning headrest for a car. The structure of the friction positioning headrest can enable the user to adjust the position of the headrest to a comfortable position for use.

[0004] To achieve the above-mentioned purpose, the present invention provides a friction positioning headrest for an automobile, which includes a base and a headrest seat, the headrest seat is connected to the base for forward and backward sliding via a guide structure, the base is provided with a shell located in the middle, a conical tightening shell, a movable sleeve shell and a spring member are provided in the shell, the rear end of the conical tightening shell is abutted against the base, the front end of the conical tightening shell is abutted against the base, the headrest seat has a connecting shaft extending into the shell and passing through the conical tightening shell, the conical tightening shell can clamp the connecting shaft by contraction, the movable sleeve shell is sleeved on the outer surface of the conical tightening shell, and the movable sleeve shell can move forward and backward relative to the shell to tighten or loosen the conical tightening shell, the spring member abuts against the movable sleeve shell to maintain its tightened state with respect to the conical tightening shell, and an operating part that can drive the movable sleeve shell to move is provided on the outside of the shell.

[0005] In one or more embodiments, the rear end of the shell has a protrusion that abuts against the conical tightening shell, the front end of the shell is provided with a plate body with a connecting hole, and the front end of the conical tightening shell has a positioning portion that docks with the connecting hole.

[0006] In one or more embodiments, a buckling portion is provided on the plate body, and a buckling position cooperating with the buckling portion is provided on the side wall of the shell.

[0007] In one or more embodiments, a plurality of grooves are circumferentially distributed on the front end side wall of the shell.

[0008] In one or more embodiments, the operating portion is disposed at the rear of the housing, and the movable cover has a connecting portion that passes through the housing and is connected to the operating portion.

[0009] In one or more embodiments, the guide structure includes guide slide bars distributed up and down on the pillow seat, and a sliding sleeve that slides in cooperation with the guide slide bars is provided on the base.

[0010] In one or more embodiments, a convex step is provided on the periphery of the movable shell, and the spring member is sleeved on the outer side of the movable shell, one end of the spring member abuts against the front side of the base, and the other end of the spring member abuts against the convex step.

[0011] In one or more embodiments, a concave step is provided on the front side of the conical tightening shell, and a boss is provided on the inner side of the front end of the movable sleeve shell. When the boss contacts the concave step, the movable sleeve shell can be restricted from sliding backward.

[0012] In one or more embodiments, a plurality of notches extending forward along the rear end of the conical tightening shell are provided on the shell wall of the conical tightening shell, the notches penetrate the inner and outer shell walls of the conical tightening shell, and the plurality of notches are evenly distributed circumferentially.

[0013] Compared with the background technology, the present invention has the following effects: the positioning principle adopted by the friction positioning headrest is to clamp and fix by using friction force, the connecting shaft on the headrest seat is contracted and clamped by the conical tightening shell, so as to fix the position of the headrest seat, and when adjusting the position, it is only necessary to move the movable sleeve shell forward through the operating part, and the conical tightening shell will recover its deformation after losing the squeezing force of the movable sleeve shell, and then the headrest seat can be moved to adjust the position. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the headrest seat of the present invention in a locked state;

[0015] Figure 2 is a cross-sectional view of the headrest seat of the present invention in a relaxed state;

[0016] Figure 3 An exploded view of the friction positioning headrest of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the conical tightening shell of the present invention;

[0018] Figure 5 It is a schematic structural diagram of the friction positioning headrest of the present invention. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] See attached Figure 1-5The present application provides a friction positioning headrest for a car, which includes a base 1 and a headrest seat 2. The headrest seat is connected to the base 1 for forward and backward sliding through a guide structure to ensure that the headrest seat can slide stably. The base is provided with a shell 3 in the middle, and a conical tightening shell 4, a movable sleeve shell 5 and a spring member 6 are provided in the shell. The rear end of the conical tightening shell is against the base, and the front end of the conical tightening shell is against the base. The headrest seat 2 has a connecting shaft 7 that extends into the shell and passes through the conical tightening shell 4. The conical tightening shell 4 can clamp the connecting shaft 7 by shrinking. The movable sleeve shell 5 is sleeved on the outer surface of the conical tightening shell, and the movable sleeve shell can be relative to the front of the shell. The movable sleeve 5 is moved back and forth to tighten or loosen the conical tightening shell, and the spring member 6 is abutted against the movable sleeve 5 to maintain its tightened state on the conical tightening shell. An operating portion 8 that can drive the movable sleeve to move is provided on the outside of the shell 3. During specific use, the user drives the movable sleeve to move forward through the operating portion. During the movement, the spring member is gradually compressed, and the movable sleeve gradually loosens the conical tightening shell. At this time, the user can move the headrest seat to adjust the position of the headrest seat. When the position is adjusted, the operating portion is released. At this time, the spring member recovers its deformation and pushes the movable sleeve backward, so that the movable sleeve squeezes the conical tightening shell again, and the conical tightening shell contracts and re-locks the connecting shaft.

[0021] The rear end of the shell 3 has a protrusion 9 that abuts against the conical tightening shell. The protrusion can avoid direct contact between the conical tightening shell and the rear side plate of the base, reduce the contact area, and avoid affecting the deformation of the conical tightening shell. The front end of the shell 3 is provided with a plate body 10, and a connecting hole is opened on the plate body. The front end of the conical tightening shell has a positioning part 11 that docks with the connecting hole. With the cooperation of the positioning part and the positioning hole, the displacement of the conical tightening shell can be avoided, and the conical tightening shell is positioned and fixed.

[0022] The plate body 10 is provided with a buckle part 101, and the side wall of the shell 3 is provided with a buckle position 12 that cooperates with the buckle part. The plate body is buckled with the buckle position through the buckle part to be installed and fixed on the shell. The use of this structure can facilitate the production of components and the removal and replacement of the plate body when the material is replaced later. Furthermore, there are multiple grooves 13 distributed circumferentially on the front side wall of the shell 3. The multiple grooves divide the front end of the shell into multiple structural bodies 32, and the buckle position 12 is set on these structural bodies. When installing the plate body, the structural body can be slightly deformed by extrusion, which makes it easy for the buckle part to buckle with the buckle position.

[0023] The operating part 8 is arranged at the rear of the shell, and the movable shell 5 has a connecting part 51 that passes through the shell and is connected to the operating part. The user presses the operating part to move the movable shell forward, thereby loosening the conical tightening shell. At this time, the user can pull the headrest seat to adjust the position.

[0024] Specifically, the guide structure includes guide slide bars 14 distributed up and down on the headrest seat, a sliding sleeve that slides with the guide slide bars is provided on the base 1, and the front end of the guide slide bar is connected and fixed to the headrest seat.

[0025] The outer periphery of the movable shell 5 is provided with a convex step 15, and the spring member 6 is sleeved on the outer side of the movable shell. One end of the spring member abuts against the front side of the base 3, and the other end of the spring member abuts against the convex step 15. The convex step provides a fulcrum for the spring member connection and can also prevent the spring from shifting.

[0026] The front side of the conical tightening shell 4 is provided with a concave step 16, and the inner side of the front end of the movable shell is provided with a boss 17. When the boss contacts the concave step, the movable shell can be restricted from sliding backward. The concave step and the boss cooperate to limit the moving range of the movable shell, thereby preventing the movable shell from being stuck with the conical tightening shell due to excessive movement.

[0027] The shell wall of the conical tightening shell 4 is provided with a plurality of notches 18 extending forward along the rear end of the conical tightening shell, the notches penetrate the inner and outer shell walls of the conical tightening shell, and the plurality of notches are evenly distributed circumferentially. The conical tightening shell in this embodiment is provided with two left and right notches. When the movable sleeve shell moves backward, the conical tightening shell body divided into upper and lower parts by the two notches gradually approaches and tightens the connecting shaft until the connecting shaft is locked.

[0028] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A friction positioning headrest for an automobile, comprising a base (1) and a headrest seat (2), the headrest seat being connected to the base (1) by a guide structure for sliding forward and backward movement, the base being provided with a shell (3) at the middle, the shell being provided with a conical tightening shell (4), a movable sleeve shell (5) and a spring member (6), the rear end of the conical tightening shell being against the base, the front end of the conical tightening shell being against the base, the headrest seat (2) having a connecting shaft (7) extending into the shell and passing through the conical tightening shell (4), the conical tightening shell (4) being able to clamp the connecting shaft (7) by contraction, the movable sleeve shell (5) being sleeved on the outer surface of the conical tightening shell, and the movable sleeve shell being able to move forward and backward relative to the shell to tighten or loosen the conical tightening shell, the spring member (6) being against the movable sleeve shell (5) to maintain its tightened state with respect to the conical tightening shell, and the shell (3) being provided with an operating portion (8) outside the shell for driving the movable sleeve shell to move.

2. A friction positioning headrest for a car according to claim 1, characterized in that: The rear end of the shell (3) has a protruding portion (9) that abuts against the conical tightening shell, the front end of the shell (3) is provided with a plate body (10) with a connecting hole, and the front end of the conical tightening shell has a positioning portion (11) that abuts against the connecting hole.

3. A friction positioning headrest for a car according to claim 2, characterized in that: The plate body (10) is provided with a buckling portion (101), and the side wall of the shell (3) is provided with a buckling position (12) that matches the buckling portion.

4. The friction positioning headrest for a vehicle according to claim 1, characterized in that: A plurality of slots (13) are circumferentially distributed on the front end side wall of the housing (3).

5. The friction positioning headrest for a vehicle according to claim 1, characterized in that: The operating part (8) is arranged at the rear of the housing, and the movable cover (5) has a connecting part (51) that passes through the housing and is connected to the operating part.

6. A friction positioning headrest for a vehicle according to claim 1 or 5, characterized in that: The guide structure comprises guide slide bars (14) which are distributed up and down on the pillow seat, and a slide sleeve which slides in cooperation with the guide slide bar is provided on the base (1).

7. The friction positioning headrest for a vehicle according to claim 1, characterized in that: The outer periphery of the movable shell (5) is provided with a convex step (15), and the spring member (6) is sleeved on the outer side of the movable shell, one end of the spring member abuts against the front side of the base, and the other end of the spring member abuts against the convex step (15).

8. The friction positioning headrest for a vehicle according to claim 7, characterized in that: The front side of the conical tightening shell (4) is provided with a concave step (16), and the inner side of the front end of the movable sleeve shell is provided with a boss 17. When the boss contacts the concave step, the movable sleeve shell can be restricted from sliding backward.

9. A friction positioning headrest for a vehicle according to claim 1 or 8, characterized in that: The shell wall of the conical tightening shell (4) is provided with a plurality of notches (18) extending forward along the rear end of the conical tightening shell, the notches passing through the inner and outer shell walls of the conical tightening shell, and the plurality of notches are evenly distributed in the circumferential direction.

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