Four-way hidden headrest with square guide rails

Abstract

The utility model discloses a square guide rail four-way hidden type headrest which comprises 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, an installation plate and a square guide rail, the installation plate is fixed on the headrest guide rod, the square guide rail is fixed on the installation plate, sliding rails are arranged on two sides of the square guide rail, and the sliding rails are arranged on the installation 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 utility model belongs to the field of automobile interior decoration, and particularly relates to an automobile headrest. Background Art

[0002] To meet people's daily needs, many vehicles are equipped with four-way adjustable headrests that adjust up and down, forward and backward. However, most headrests leave the headrest rod visible during movement. Therefore, a concealed four-way adjustable headrest is needed to address this issue. Furthermore, to ensure the safety of the headrest's forward and backward adjustment mechanism, the front and rear sliding rods or grooves should be designed as plastic as possible.

[0003] For example, CN 215042307 U discloses a four-way unlocking mechanism for a vehicle headrest. This mechanism features a simple overall structure, reduces costs, and effectively addresses the noise issues associated with retaining springs. However, its vertical adjustment mechanism still relies on a headrest guide rod, which fails to address the issue of the headrest rod being exposed during vertical travel.

[0004] Another example is CN 219706768 U, which discloses a suspended adjustable headrest. By designing a rear cover connecting rod and a headrest connecting rod arranged in the X-axis direction, the headrest can be adjusted up and down without revealing the connection between the headrest and the seat, thus improving the overall aesthetics. However, the metal headrest connecting rod 17 must be welded to the backrest frame, limiting the design freedom of the headrest. Furthermore, because the metal connecting rod extends forward, additional structure is required to ensure the safety of the headrest. Utility Model Content

[0005] In order to solve the above problems existing in the prior art, the utility model 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 ensures the safety of the headrest's front and rear adjustment.

[0006] To achieve the above-mentioned purpose, the utility model 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 mounted 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 to the headrest guide rod, the square guide rail is fixed to 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 front and rear locking boxes, 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 push plates and front and rear locking push plates are arranged on the front and rear slide grooves, and the front and rear A central gear is provided in the slide slot, and the upper and lower locking push plates and the front and rear locking push plates are all provided with racks meshing with the central gear. A locking plate is fixed to the upper and lower locking push plates, and a locking push plate that pushes the locking plate is provided on the headrest body. A return spring and a locking strip are provided on the locking plate, and the locking strip is stuck in the upper and lower locking teeth for locking; pushing the locking push plate, the locking push 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 up and down unlocking. At the same time, the locking plate pushes the upper and lower locking push plates, and the racks of the upper and lower locking push plates drive the central gear to rotate, and the central gear drives the front and rear locking push plates meshing with it, and the front and rear locking push 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 further provided in the slide rail, and the flexible bushing is provided between the slide rail and the slide groove. The flexible bushing includes a bushing deformation portion and a bushing support portion.

[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, thereby making the headrest guide rod 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 engages 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 and unlocking operations.

[0014] 3. The front and rear locking boxes are designed with plastic structures and 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 this patent;

[0016] Figure 2 This is a schematic diagram of the patented headrest assembly 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 patented headrest;

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

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

[0021] Figure 7 Schematic diagram of the front and rear locking boxes of this patent;

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

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

[0024] Figure 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-4The utility model 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 provided on both sides of the square guide rail 12, and slide grooves 21 are provided on both sides of the headrest sliding end 2, the headrest sliding end 2 is inserted into the slide rails 125 through the slide grooves 21, and upper and lower locking teeth 126 are provided on the slide rails 125, and front and rear locking boxes 29 are provided on the headrest sliding end 2, and front and rear locking teeth 291 are provided on the front and rear locking boxes 29, and 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, and racks meshing with the central gear 26 are provided on the upper and lower locking thrust plates 24 and the front and rear locking thrust plates 25. A locking plate 23 is fixed on the upper and lower locking thrust plates 24. A locking thrust plate 22 for pushing the locking plate 23 is provided on the headrest body. A return spring 232 and a locking strip 231 are provided on the locking plate 23. The locking strip 231 is stuck in the upper and lower locking teeth 126 for locking; pushing the locking thrust plate 22, locking the thrust plate 22 The locking plate 23 is pushed, 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, and 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 meshed with it, 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.

[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 this application adopts the common headrest in this field, 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 four bolts. There are slide rails 125 on both sides of the square guide rail 12. Flexible bushings 13 are provided between the slide rails 125 and the slide grooves 21 on both sides. Bushing limiters 123 are provided on the slide rails 125. The flexible bushing 13 is stuck in the bushing limiter 123 through the protrusions on it, thereby limiting its lateral position. Upper and lower locking teeth 126 are provided on the slide rail 125. There are multiple upper and lower locking teeth 126 from top to bottom to form a multi-level locking.

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

[0029] like Figure 5 The front and rear locking boxes 29 are provided with front and rear slides 30, which can slide back and forth along the guideways within the front and rear locking boxes 29. The front and rear slides 30 are provided with upper and lower locking thrust plates 24 and front and rear locking thrust plates 25. The upper and lower locking thrust plates 24 are respectively located on the left and right sides of the front and rear slides 30, while the front and rear locking thrust plates 25 are respectively located on the upper and lower sides of the front and rear slides 30. The upper and lower locking thrust plates 24 and the front and rear locking thrust plates 25 are all locked into the slots defined in the front and rear slides 30, ensuring that they can freely extend and retract along these slots. A central gear 26 is provided within the front and rear slides 30 and is mounted on a gear pin 27, which is fixed to the front and rear locking boxes 29. The gear pin 27 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 engaged with the central gear 26.

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

[0031] When the headrest does not need to be adjusted, 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 push 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 push plate 22 is pressed, and the locking push 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 push plates 24 to move toward the center gear. The racks of the upper and lower locking push plates 24 drive the central gear 26 to rotate around the gear pin 27. The central gear 26 drives the front and rear locking push plates 25 meshed with it to move synchronously toward the center, that is, the front and rear locking push plates 25 retract inward, so that the front and rear locking push 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 fore and aft. 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 push plate 22 is pressed and pushes the locking plate 23 on one side, this locking plate 23 pushes the upper and lower locking push plates 24 fixed to it to move inward. The upper and lower locking push plates 24 drive the central gear 26 to rotate to the right via the rack. The central gear 26 simultaneously drives the upper and lower locking push plates 24 on the other side and the front and rear locking push plates 25 above and below to move synchronously toward the center. In this way, the locking push plates on the front, rear, left, and right sides of the gear retract inward, thereby completely unlocking the headrest. Once unlocked, the headrest body can be adjusted up and down, front and back. The headrest body is fixed to the headrest sliding end 2. When adjusting the headrest body up and down, the headrest sliding end 2 slides up and down along the slide rail 125 through the slide groove 21 and locks when it is adjusted into place, thus completing the headrest adjustment. When adjusting the headrest body forward and backward, the headrest body slides forward and backward along the slide rail in the front and rear locking box 29 through the front and rear slide grooves 30 and locks when it is adjusted into place, thus completing the headrest adjustment.

[0034] Spring pieces 28 are provided on the front and rear locking boxes 29 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 Figure 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 groove 21, and an interference fit is achieved between the flexible bushing deformation portion 131 and the slide groove 21, and the bushing support portion 132 is used to support the flexible bushing deformation and achieve contact fit with the square guide rail 12; by adjusting the interference of the flexible bushing deformation portion 131 and the span of the bushing support portion 132, the sliding operating force and relative stiffness of the slide groove 21 and the square guide rail 12 can be adjusted.

[0036] Finally, it should be noted that the above are merely 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 will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A square guide rail four-way hidden headrest, characterized in that: The invention comprises a headrest body, a headrest fixed end (1), and a headrest sliding end (2); the headrest 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); the headrest sliding end (2) is connected to the headrest guide rod (11); and the square guide rail (12) is connected to the mounting plate (14). 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). The front and rear locking boxes (29) are provided with front and rear slide grooves (30), and 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 front and rear slide grooves (30) are provided with central gears (26), and the upper and lower locking thrust plates are provided with (24) and the front and rear locking thrust plates (25) are 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) for pushing 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 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). 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) meshed with it. 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. The square guide 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) includes a bushing deformation portion (131) and a bushing support portion (132).

3. The square guide 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 guide 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 guide 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). 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 guide 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 guide 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.

Images