Four-way hidden headrest with square guide rails

Abstract

The headrest comprises a headrest body, a headrest fixing end and a headrest sliding end, the headrest body is mounted at the headrest sliding end, the headrest fixing end comprises a headrest guide rod, a mounting plate and a square guide rail, the mounting plate is fixed to the headrest guide rod, the square guide rail is fixed to the mounting plate, sliding rails are arranged on the two sides of the square guide rail, and the square guide rail is fixed to the mounting plate. Sliding grooves are formed in the two sides of the headrest sliding end, the headrest sliding end is inserted into the sliding rails through the sliding grooves, upper locking teeth and lower locking teeth are arranged on the sliding rails, a front-back locking box is arranged at the headrest sliding end, front-back locking teeth are arranged on the front-back locking box, front-back sliding grooves are formed in the front-back locking box, and upper locking push plates and lower locking push plates and front-back locking push plates are arranged on the front-back sliding grooves. A central gear is arranged in the front-back sliding groove, racks meshed with the central gear are arranged on the up-down locking push plate and the front-back locking push plate, a locking plate is fixed to the up-down locking push plate, a locking push plate for pushing the locking plate is arranged on the headrest body, and a return spring and a locking strip are arranged on the locking plate. And the locking strip is clamped in the upper and lower locking teeth for locking.

Description

Technical Field

[0001] The invention belongs to the field of automobile interior decoration, and in particular relates to an automobile headrest. Background Art

[0002] In order to meet people's living needs, many vehicles are equipped with four-way headrests that can be adjusted up and down, front and back. When most headrests move up and down, the headrest rods are exposed and visible. Therefore, it is necessary to design and develop a hidden four-way adjustable headrest to solve the problem of the headrest rod being exposed when the headrest moves up and down. In addition, in order to meet the safety of the headrest's front and back adjustment mechanism, the front and rear slide bars or slide grooves should be designed as plastic structures as much as possible.

[0003] For example, CN 215042307 U discloses a four-way unlocking mechanism for a car headrest, which has a simple overall structure, saves costs, and can effectively solve the noise problem caused by the spring locking structure. However, its up and down adjustment mechanism is still realized by means of the headrest guide rod, which cannot solve the problem of the headrest rod being exposed during the up and down travel.

[0004] Another example is CN 219706768 U, which discloses a suspended adjustable headrest, which is designed with a rear cover connecting rod and a headrest connecting rod arranged in the X-axis direction, so that the headrest can be adjusted up and down without leaking the connection part between the headrest and the seat, thereby improving the overall aesthetics. However, the metal headrest connecting rod 17 needs to be welded to the backrest frame, which limits the design freedom of the headrest shape, and because the metal connecting rod extends forward, an additional structure is required to ensure the safety of the headrest. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a square guide rail four-way hidden headrest, which solves the problem of the headrest rod being exposed when the headrest moves up and down, and at the same time realizes the safety of adjusting the headrest in the front and rear directions.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a square guide rail four-way hidden headrest, comprising a headrest body, a headrest fixed end, and a headrest sliding end, the headrest body is installed on the headrest sliding end, the headrest fixed end comprises a headrest guide rod, a mounting plate, and a square guide rail, the mounting plate is fixed on the headrest guide rod, the square guide rail is fixed on the mounting plate, slide rails are arranged on both sides of the square guide rail, slide grooves are arranged on both sides of the headrest sliding end, the headrest sliding end is inserted into the slide rail through the slide groove, upper and lower locking teeth are arranged on the slide rail, front and rear locking boxes are arranged on the sliding end of the headrest, front and rear locking teeth are arranged on the front and rear locking boxes, front and rear slide grooves are arranged in the front and rear locking boxes, upper and lower locking thrust plates and front and rear locking thrust plates are arranged on the front and rear slide grooves, and the front and rear slides are provided with A central gear is arranged in the groove, and racks meshing with the central gear are arranged on the upper and lower locking thrust plates and the front and rear locking thrust plates, and locking plates are fixed to the upper and lower locking thrust plates, and a locking thrust plate for pushing the locking plate is arranged on the headrest body, and a return spring and a locking strip are arranged on the locking plate, and the locking strip is stuck in the upper and lower locking teeth for locking; the locking thrust plate is pushed, and the locking thrust plate pushes the locking plate, the return spring is compressed, and the locking strip on the locking plate comes out from the upper and lower locking teeth to realize upper and lower unlocking, and at the same time, the locking plate pushes the upper and lower locking thrust plates, and the racks of the upper and lower locking thrust plates drive the central gear to rotate, and the central gear drives the front and rear locking thrust plates meshing therewith, and the front and rear locking thrust plates come out from the front and rear locking teeth on the front and rear locking boxes to realize front and rear unlocking.

[0007] A flexible bushing is also arranged in the slide rail, and the flexible bushing is arranged between the slide rail and the slide groove. The flexible bushing includes a bushing deformation part and a bushing support part.

[0008] The central gear is arranged on a gear pin which can rotate around the central gear, and the gear pin is fixed on the front and rear locking boxes.

[0009] The front and rear locking boxes are provided with spring pieces.

[0010] There are two front and rear locking thrust plates, which are respectively arranged on the upper and lower sides of the central gear. Front and rear locking boxes are also provided with front and rear locking teeth at the top and bottom respectively, corresponding to the two front and rear locking thrust plates.

[0011] There are two upper and lower locking thrust plates, which are respectively arranged on the left and right sides of the central gear.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. When the headrest moves up and down, the headrest guide rod always maintains a positional relationship with the sliding end of the headrest, so that the headrest guide rod is invisible throughout the entire adjustment stroke, achieving the purpose of concealment and solving the problem of the headrest rod being exposed during the four-way headrest movement stroke.

[0013] 2. The central gear meshes with the upper and lower locking thrust plates and the front and rear locking thrust plates at the same time, ensuring the synchronization of the upper and lower and front and rear locking-unlocking operations.

[0014] 3. The front and rear locking boxes are designed with plastic structures, which can be integrated with the headrest body, and the plastic structure has a higher safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the headrest assembly of the present patent;

[0016] Figure 2 This is a schematic diagram of the headrest assembly of the patent from another angle;

[0017] Figure 3 This is a schematic diagram of the fixed end of the headrest of this patent;

[0018] Figure 4 This is a front view of the sliding end of the headrest of the present patent;

[0019] Figure 5 This is a schematic diagram of the back side of the sliding end of the headrest of the present patent;

[0020] Figure 6 This is a schematic diagram of the headrest unlocking mechanism of the present patent;

[0021] Figure 7 It is a schematic diagram of the front and rear locking boxes of this patent;

[0022] Figure 8 It is a schematic diagram of the front and rear slideways of this patent;

[0023] Fig. 9 This is a top view of the patented headrest unlocking mechanism;

[0024] Fig.10 This is a schematic diagram of the flexible bushing of this patent. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-4The present invention provides the following technical solutions: a square guide rail four-way hidden headrest, characterized in that it includes a headrest body, a headrest fixed end 1, and a headrest sliding end 2, the headrest body is installed on the headrest sliding end 2, the headrest fixed end 1 includes a headrest guide rod 11, a mounting plate 14, and a square guide rail 12, the mounting plate 14 is fixed on the headrest guide rod 11, the square guide rail 12 is fixed on the mounting plate 14, slide rails 125 are arranged on both sides of the square guide rail 12, and slide grooves 21 are arranged on both sides of the headrest sliding end 2, the headrest sliding end 2 is inserted into the slide rail 125 through the slide groove 21, and upper and lower locking teeth 126 are arranged on the slide rail 125, and front and rear locking boxes 29 are arranged on the headrest sliding end 2, and front and rear locking teeth 291 are arranged on the front and rear locking boxes 29, and front and rear slide grooves 30 are arranged in the front and rear locking boxes 29, and upper and lower locking thrust plates 24 and front and rear locking thrust plates 25 are arranged on the front and rear slide grooves 30, and upper and lower locking thrust plates 24 and front and rear locking thrust plates 25 are arranged in the front and rear slide grooves 30. The headrest body is provided with a central gear 26, and the upper and lower locking thrust plates 24 and the front and rear locking thrust plates 25 are all provided with racks meshing with the central gear 26. The upper and lower locking thrust plates 24 are fixed with locking plates 23. The headrest body is provided with a locking thrust plate 22 that pushes the locking plate 23. The locking plate 23 is provided with a return spring 232 and a locking strip 231. The locking strip 231 is stuck in the upper and lower locking teeth 126 for locking; the locking thrust plate 22 is pushed, and the locking thrust plate 22 pushes the locking thrust plate 22. The locking plate 23 is moved, and the return spring 232 is compressed. The locking strip 231 on the locking plate 23 comes out from the upper and lower locking teeth 126 to realize upper and lower unlocking. At the same time, the locking plate 23 pushes the upper and lower locking thrust plates 24. The racks of the upper and lower locking thrust plates 24 drive the central gear 26 to rotate. The central gear 26 drives the front and rear locking thrust plates 25 meshing therewith. The front and rear locking thrust plates 25 come out from the front and rear locking teeth 291 on the front and rear locking boxes 29 to realize front and rear unlocking.

[0027] The headrest body is fixed on the headrest sliding end 2, specifically fixed on the front and rear slide grooves 30. The headrest of the present application adopts a common headrest in the art, which is not shown in the drawings. Figure 3 The headrest fixed end 1 includes a headrest guide rod 11 and a mounting plate 14. The headrest guide rod 11 is a metal rod, and the mounting plate 14 is a sheet metal structure. The mounting plate 14 is welded to the headrest guide rod 11, and the square guide rail 12 is fixed to the mounting plate 14 by 4 bolts. There are slide rails 125 on both sides of the square guide rail 12. Flexible bushings 13 are arranged between the slide rails 125 and the slide groove 21 on both sides. Bushing limiters 123 are arranged on the slide rails 125. The flexible bushing 13 is stuck in the bushing limiter 123 through the convex points on it to limit it laterally. Upper and lower locking teeth 126 are arranged on the slide rail 125, and multiple upper and lower locking teeth 126 are arranged from top to bottom to form a multi-gear locking.

[0028] like Figure 4, slide grooves 21 are provided on both sides of the headrest sliding end 2, and the headrest sliding end 2 is inserted into the slide rail 125 through the slide grooves 21. The headrest sliding end 2 is provided with front and rear locking boxes 29, which are square plastic box structures. The front and rear locking boxes 29 can be integrally molded with the headrest sliding end 2 as a whole, or can be a separate component, and it is fixed to the headrest sliding end 2 by various means such as screws, bonding, welding, etc. The front and rear locking boxes 29 are provided with front and rear locking teeth 291, and the front and rear locking teeth 291 are arranged in multiple rows from front to back to form a multi-gear locking.

[0029] like Figure 5 The front and rear locking boxes 29 are provided with front and rear slide grooves 30, which can slide forward and backward along the slideways in the front and rear locking boxes 29. The front and rear slide grooves 30 are provided with upper and lower locking thrust plates 24 and front and rear locking thrust plates 25. The two upper and lower locking thrust plates 24 are respectively provided on the left and right sides of the front and rear slide grooves 30, and the front and rear locking thrust plates 25 are respectively provided on the upper and lower sides of the front and rear slide grooves 30. The upper and lower locking thrust plates 24 and the front and rear locking thrust plates 25 are all stuck on the slots provided on the front and rear slide grooves 30 to ensure that they can be extended and retracted freely along these slots. The front and rear slide grooves 30 are provided with a central gear 26, which is mounted on a gear pin 27, and the gear pin 27 is fixed on the front and rear locking boxes 29, which can be pre-embedded in the front and rear locking boxes 29 through an insert injection molding process. The central gear 26 can rotate around the gear pin 27. The central gear 26 is arranged near the middle position of the front and rear slide grooves 30, and the upper and lower locking thrust plates 24 and the front and rear locking thrust plates 25 are distributed around the front and rear slide grooves 30. The upper and lower locking thrust plates 24 and the front and rear locking thrust plates 25 are all provided with racks, and the racks are meshed with the central gear 26.

[0030] The upper and lower locking thrust plates 24 are fixed with locking plates 23, which are clamped on the upper and lower locking thrust plates 24. The locking plates 23 are provided with return springs 232 and locking strips 231, which can be made of hard steel wire. The headrest body is provided with a locking thrust plate 22, which can be clamped on the headrest body and is used to push the locking plate 23 on one side.

[0031] When there is no need to adjust the headrest, the entire structure is locked, that is, the locking strip 231 of the locking plate 23 is stuck in the upper and lower locking teeth 126 of the slide rail 125, so that the entire headrest sliding end 2 cannot be slid up and down for adjustment. At the same time, the front and rear locking thrust plates 25 are stuck in the front and rear locking teeth 291 in the front and rear locking boxes 29, so that the front and rear slide grooves 30 cannot be slid forward and backward for adjustment.

[0032] When the headrest needs to be adjusted, the locking thrust plate 22 is pressed, and the locking thrust plate 22 pushes the locking plate 23, the return spring 232 is compressed, and the locking strip 231 on the locking plate 23 comes out from the upper and lower locking teeth 126 to realize the upper and lower unlocking. At the same time, the locking plate 23 pushes the upper and lower locking thrust plates 24 to move toward the center gear, and the racks of the upper and lower locking thrust plates 24 drive the central gear 26 to rotate around the gear pin 27. The central gear 26 drives the front and rear locking thrust plates 25 meshing therewith to move synchronously toward the center, that is, the front and rear locking thrust plates 25 shrink inward, so that the front and rear locking thrust plates 25 come out from the front and rear locking teeth 291 on the front and rear locking boxes 29 to realize the front and rear unlocking. In this way, the purpose of unlocking the upper and lower parts and the front and rear parts at the same time is achieved, so that the headrest can be adjusted up and down and front and rear. When the adjustment is in place, the locking push plate 22 is released, and the locking plate 23 returns to its original position under the action of the return spring 232. The locking strip 231 is re-engaged in the upper and lower locking teeth 126 to achieve the upper and lower locking, and the upper and lower locking push plates 24 are also re-engaged, thereby driving the central gear 26 to rotate in the opposite direction, driving the front and rear locking push plates 25 to extend outward, and re-engage the front and rear locking teeth 291 on the front and rear locking boxes 29 to achieve the front and rear locking.

[0033] like Figure 6 When the locking plate 22 is pressed to push the locking plate 23 on one side, the locking plate 23 pushes the upper and lower locking plates 24 fixed thereto to move inward, and the upper and lower locking plates 24 drive the central gear 26 to rotate rightward through the rack, and the central gear 26 drives the upper and lower locking plates 24 on the other side and the upper and lower front and rear locking plates 25 to move synchronously toward the center, so that the locking plates of the front, rear, left and right sides of the gear are all retracted inward, thereby all being unlocked. After unlocking, the headrest body can be adjusted up and down, front and back. The headrest body is fixed on the headrest sliding end 2. When the headrest body is adjusted up and down, the headrest sliding end 2 slides up and down along the slide rail 125 through the slide groove 21, and is locked after being adjusted to the right position, thereby completing the up and down adjustment of the headrest; when the headrest body is adjusted forward and backward, the headrest body slides forward and backward along the slideway in the front and rear locking box 29 through the front and rear slide grooves 30, and is locked after being adjusted to the right position, thereby completing the front and rear adjustment of the headrest.

[0034] The front and rear locking boxes 29 are provided with spring pieces 28 to ensure that the front and rear locking boxes 29 are subjected to uniform pressure when sliding in the front and rear directions, thereby improving NVH performance and operating feel.

[0035] like Fig.10The flexible bushing 13 includes a bushing deformation portion 131 and a bushing support portion 132. The flexible bushing 13 is installed between the slide rail 125 and the slide slot 21, and an interference fit is achieved between the flexible bushing deformation portion 131 and the slide slot 21, and a contact fit is achieved between the flexible bushing deformation support and the square guide rail 12 through the bushing support portion 132; the sliding operation force and relative rigidity of the slide slot 21 and the square guide rail 12 can be adjusted by adjusting the interference amount of the flexible bushing deformation portion 131 and the span of the bushing support portion 132.

[0036] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A square rail four-way hidden headrest, characterized in that: The headrest body comprises a headrest main body, a headrest fixed end (1), and a headrest sliding end (2), wherein the headrest main body is mounted on the headrest sliding end (2), the headrest fixed end (1) comprises a headrest guide rod (11), a mounting plate (14), and a square guide rail (12), the mounting plate (14) is fixed on the headrest guide rod (11), the square guide rail (12) is fixed on the mounting plate (14), slide rails (125) are arranged on both sides of the square guide rail (12), slide grooves (21) are arranged on both sides of the headrest sliding end (2), and the headrest sliding end (2) is connected to the headrest guide rod (11). The slide rail (125) is inserted through the slide groove (21), and the slide rail (125) is provided with upper and lower locking teeth (126). The headrest sliding end (2) is provided with front and rear locking boxes (29), and the front and rear locking boxes (29) are provided with front and rear locking teeth (291). Front and rear slide grooves (30) are provided in the front and rear locking boxes (29), and upper and lower locking thrust plates (24) and front and rear locking thrust plates (25) are provided on the front and rear slide grooves (30). A central gear (26) is provided in the front and rear slide grooves (30), and the upper and lower locking thrust plates The headrest body is provided with a locking thrust plate (22) for pushing the locking plate (23), and the locking plate (23) is provided with a return spring (232) and a locking strip (231). The locking strip (231) is stuck in the upper and lower locking teeth (126) for locking; the locking thrust plate (22) pushes the locking plate (23) and the locking thrust plate (22) pushes the locking plate (23). ), the return spring (232) is compressed, the locking strip (231) on the locking plate (23) comes out from the upper and lower locking teeth (126) to realize the upper and lower unlocking, and at the same time, the locking plate (23) pushes the upper and lower locking thrust plates (24), and the racks of the upper and lower locking thrust plates (24) drive the central gear (26) to rotate, and the central gear (26) drives the front and rear locking thrust plates (25) meshed therewith, and the front and rear locking thrust plates (25) come out from the front and rear locking teeth (291) on the front and rear locking boxes (29) to realize the front and rear unlocking.

2. A square rail four-way hidden headrest according to claim 1, characterized in that: A flexible bushing (13) is also provided in the slide rail (125). The flexible bushing (13) is provided between the slide rail (125) and the slide groove (21). The flexible bushing (13) comprises a bushing deformation portion (131) and a bushing support portion (132).

3. The square rail four-way hidden headrest according to claim 1, characterized in that: The central gear (26) is arranged on a gear pin (27) which can rotate around the central gear, and the gear pin (27) is fixed on the front and rear locking boxes (29).

4. The square rail four-way hidden headrest according to claim 1, characterized in that: The front and rear locking boxes (29) are provided with spring pieces (28).

5. The square rail four-way hidden headrest according to claim 1, characterized in that: There are two front and rear locking thrust plates (25), which are respectively arranged on the upper and lower sides of the central gear (26). The front and rear locking boxes (29) are also provided with front and rear locking teeth (291) at the top and bottom, respectively, corresponding to the two front and rear locking thrust plates (25).

6. The square rail four-way hidden headrest according to claim 1, characterized in that: There are two upper and lower locking thrust plates (24), which are respectively arranged on the left and right sides of the central gear (26).

7. The square rail four-way hidden headrest according to claim 1, characterized in that: The headrest sliding end (2) and the front and rear locking boxes (29) are all made of plastic.

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