Turnover type headrest applied to deformation seat

Abstract

The utility model discloses a turnover type headrest applied to a deformation seat, which comprises a mounting base used for being assembled on a backrest of the seat and a headrest supporting structure capable of turning over front and back relative to the mounting base, and a rotary driving mechanism is arranged on the mounting base. The driving mechanism is used for driving the headrest supporting structure to rotate back and forth relative to the mounting base; the headrest supporting structure comprises a headrest rod, the upper portion of the headrest rod is connected with a headrest, and the lower portion of the headrest rod is provided with an adapter matched with the mounting base in a rotating mode. The rotary driving mechanism comprises a fluted disc and a driving assembly arranged on the mounting base, the fluted disc is fixedly connected with the adapter, the center line of the fluted disc coincides with the rotating center line of the adapter, and the driving assembly can drive the fluted disc to rotate in a gear transmission mode. The headrest turnover mechanism has the advantage that the headrest can be turned over forwards by a large angle.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a folding headrest applied to a deformable seat. Background Art

[0002] At present, with the increasing demand for long-distance travel and camping, users have higher and higher requirements for the comfort of resting in the car. Therefore, relevant companies are actively developing technologies that can directly transform seats into beds. The current concept is mainly to set the backrest into a double-layer structure. By flipping the seat cushion forward 180 degrees, the backrest is folded forward as a whole and flush with the flipped seat cushion, and then the upper backrest is flipped backward 180 degrees to expand the bed area, thereby ensuring the comfort and convenience of operation after the seat is transformed into a bed.

[0003] In this development process, the headrest on the backrest needs to be rotated forward a certain angle when the entire backrest flips forward to prevent interference with the seat cushion during the flipping process. At the same time, the forward-flipped headrest can contact the vehicle floor, providing support for the front end of the folded backrest, thereby ensuring stability when the seat is turned into a bed. However, traditional backrest headrests can only rotate forward and backward through a small angle, which is difficult to meet these technical requirements. Utility Model Content

[0004] In view of this, the present invention provides a folding headrest for use in a deformable seat, which can be flipped forward at a large angle.

[0005] To achieve the above purpose, the technical solution of this utility model is as follows:

[0006] A folding headrest for a deformable seat comprises a mounting base for mounting on a seat back, and a headrest support structure capable of flipping forward and backward relative to the mounting base. The mounting base is provided with a rotation drive mechanism for driving the headrest support structure to rotate forward and backward relative to the mounting base.

[0007] The headrest support structure includes a headrest rod, the upper part of which is connected to the headrest, and the lower part is provided with an adapter that rotates with the mounting base; the rotation drive mechanism includes a gear disk and a drive assembly arranged on the mounting base, the gear disk is fixedly connected to the adapter, the center line of the gear disk coincides with the rotation center line of the adapter, and the drive assembly can drive the gear disk to rotate in the form of gear transmission.

[0008] Preferably, the lower portion of the headrest rod is eccentrically fixed to the sprocket through an adapter, the adapter is provided with an extension portion, the extension portion is rotatably connected to the mounting base, and the rotation center of the extension portion coincides with the center line of the sprocket.

[0009] Preferably, the toothed disc is located at the outer end of the side wall of the mounting base, a limiting column extending into the mounting base is fixedly provided at a position off-center of the toothed disc, and a limiting groove for limiting the range of movement of the limiting column is provided on the side wall of the mounting base.

[0010] Preferably, a support shaft extending along the width direction of the mounting base is fixedly provided on the mounting base, the support shaft passes through the side of the mounting base and extends outward, the gear disc is rotatably mounted on the support shaft, and the extension portion is rotatably connected to the support shaft.

[0011] Preferably, a first side bracket and a second side bracket are respectively provided at both ends of the mounting base in the width direction, the gear disc is located on the outside of the first side bracket, the drive assembly includes a motor arranged on the inner side of the first side bracket, the output shaft of the motor passes through the outside of the first side bracket, a transmission gear is fixed on the output shaft of the motor, and the gear disc is circumferentially provided with an annular tooth portion that meshes with the transmission gear.

[0012] Preferably, the headrest rods and adapters are provided in two groups, and correspond one to one, and the two groups of headrest rods are symmetrically arranged on the outside of the first side bracket and the second side bracket respectively.

[0013] Preferably, the adapter is fixedly connected to the gear disc via a pin.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The folding headrest provided by the utility model for a deformable seat connects the lower end of the headrest rod to the gear plate, and the driving assembly drives the gear plate to rotate, which can drive the lower end of the headrest rod to rotate forward along with the gear plate, that is, it can drive the headrest support structure to rotate forward and backward relative to the mounting base. Through the gear plate transmission, the range of movement of the headrest support structure can be increased, thereby realizing the headrest to flip forward at a large angle.

[0016] 2. The foldable headrest provided by the present invention for use in deformable seats can change the forward or backward rotation angle of the headrest support structure by changing the positions of the limit grooves at both ends of the arc section, so that the headrest support structure can be flipped forward or backward at a large angle, which has a technical advantage of strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the foldable headrest in the initial position (headrest 7 is hidden);

[0018] Figure 2 Another structural diagram of the foldable headrest in the initial position (the headrest support structure 2 is hidden);

[0019] Figure 3It is a left side view of the folding headrest in the initial position;

[0020] Figure 4 is a cross-sectional view of the folding headrest in the initial position;

[0021] Figure 5 A schematic diagram showing the structure of the foldable headrest from another angle;

[0022] Figure 6 It is a schematic diagram of the structure of the folding headrest after it is flipped over;

[0023] Figure 7 This is a schematic diagram of another structure of the folding headrest after flipping over (the headrest support structure 2 is hidden);

[0024] Figure 8 It is a cross-sectional view of the folding headrest after it is turned over;

[0025] Figure 9 This is a reference diagram of the folding headrest in use when it is flipped back. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0027] like Figure 1 and 6 As shown, a folding headrest for a deformable seat includes a mounting base 1 for assembly on a seat back, and a headrest support structure 2 capable of flipping forward and backward relative to the mounting base 1, wherein the mounting base 1 is provided with a rotation drive mechanism 3, which is capable of driving the headrest support structure 2 to rotate forward and backward relative to the mounting base 1. The headrest support structure 2 includes a headrest rod 21, the upper portion of which is connected to a headrest 7, and the lower portion of which is provided with an adapter 4 that rotates with the mounting base 1. The rotation drive mechanism 3 includes a gear disc 31 and a drive assembly provided on the mounting base 1, which is capable of driving the gear disc 31 to rotate in the form of a gear transmission. The gear disc 31 is fixedly connected to the adapter 4, and the center line of the gear disc 31 coincides with the rotation center line of the adapter 4.

[0028] Based on the above structural design, by connecting the lower end of the headrest rod 21 to the gear plate 31, the drive assembly drives the gear plate 31 to rotate, which can drive the lower end of the headrest rod 21 to rotate forward along with the gear plate 31, that is, it can drive the headrest support structure 2 to rotate forward and backward relative to the mounting base 1. Through the gear plate transmission, the range of movement of the headrest support structure 2 can be increased, thereby achieving a large angle of forward tilt of the headrest.

[0029] For example Figure 1 and 3As shown, the lower part of the headrest rod 21 is eccentrically fixed to the sprocket 31 through the adapter 4, that is, the fixed end of the adapter 4 and the sprocket 31 deviates from the center of the sprocket 31. The adapter 4 is provided with an extension 41, and the extension 41 is rotatably matched with the mounting base 1, and the rotation center of the extension 41 coincides with the center line of the sprocket 31. Since the adapter 4 is fixedly connected to the lower part of the headrest rod 21, when the sprocket 31 rotates, it can drive the adapter 4 to rotate around the rotation center of the extension 41, thereby driving the headrest rod 21 to rotate back and forth relative to the mounting base 1. Specifically, by Figure 2 and 3 It can be seen that in this embodiment, the adapter 4 is fixedly connected to the gear disc 31 via the pin b.

[0030] Please refer to Figure 2 and 4 The toothed disc 31 is rotatably mounted on the outer end of the side wall of the mounting base 1. A limiting post 6 extending toward the interior of the mounting base 1 is fixed to the position of the toothed disc 31 eccentric to the center. An arc section 1b is provided on the side wall of the mounting base 1. When the toothed disc 31 rotates, it can drive the limiting post 6 to move along the arc section. Limiting grooves 1a are provided at both ends of the arc section 1b. The two limiting grooves 1a can limit the range of movement of the limiting post 6, that is, limit the rotation angle of the toothed disc 31. When the limiting post 6 is located in the limiting groove 1a at the rear end of the arc section 1b, the headrest support structure 2 is at the extreme position of rearward rotation. Figure 7 and 8 When the limiting post 6 is located in the limiting slot 1a at the front end of the arc segment 1b, the headrest support structure 2 is at its maximum forward rotation position. By designing the position of the limiting slots 1a at both ends of the arc segment 1b, the forward or backward rotation angle of the headrest support structure 2 can be changed, allowing the headrest support structure 2 to achieve a large forward or backward tilt.

[0031] Reference Figure 9 , a headrest that can be flipped backward at a large angle is applied to the car seat, and its function is as follows: the headrest supporting structure 2 is flipped backward, and then the backrest 8 is tilted backward, and the backrest 8 can be connected with the rear seat to form a bed. The backward-flipped headrest 7 can prevent the backrest 8 from interfering with the rear seat during the process of tilting the backrest 8 backward. At the same time, the headrest 7 can provide support for the tilted backrest 8 to ensure the stability of the seat after it becomes a bed.

[0032] like Figure 2 and 3As shown, a support shaft 5 extending along the width of the mounting base 1 is fixedly mounted on the mounting base 1. The support shaft 5 extends outward through the side of the mounting base 1. The gear plate 31 is rotatably mounted on the support shaft 5, and the extension portion 41 is rotatably connected to the support shaft 5. When the drive assembly drives the gear plate 31 to rotate, it can drive the adapter 4 to perform circular motion around the support shaft 5. Through the rotational connection between the extension portion 41 and the support shaft 5, it can provide stable support for the movement of the headrest rod 21, ensuring the reliability and stability of the rotation of the headrest support structure 2.

[0033] Re-attend Figure 1 and 2 The first side bracket 11 and the second side bracket 12 are respectively provided at both ends of the width direction of the mounting base 1, and the gear wheel 31 is rotatably arranged on the outside of the first side bracket 11. The driving component includes a motor 32, the mounting base of the motor 32 is fixedly arranged on the inside of the first side bracket 11, and the output shaft of the motor 32 passes through the first side bracket 11 and extends outward. Figure 3 As shown, a transmission gear 33 is fixedly mounted on the output shaft of the motor 32. An annular toothed portion a is provided on the outer circumference of the toothed disc 31, meshing with the transmission gear 33. The motor 32 drives the transmission gear 33 to rotate, which in turn drives the toothed disc 31 to rotate about the support shaft 5. This structural design, through the self-locking meshing action of the gears, enhances the stability of the headrest rod 21 in the locked state. In the unlocked state, the gear transmission provides the technical advantages of high transmission efficiency and precise movement.

[0034] like Figure 1 and Figure 5 As shown, there are two sets of headrest rods 21 and adapters 4, and they correspond one to one. The two sets of headrest rods 21 are symmetrically arranged outside the first side bracket 11 and the second side bracket 12, and the upper ends of the two sets of headrest rods 21 are fixedly connected by a cross bar 23. Figure 7 As can be seen, the ends of the support shaft 5 extend outward through the first side bracket 11 and the second side bracket 12, respectively. The extension portions 41 of the two sets of adapters 4 are rotatably connected to the ends of the support shaft 5. The rotary drive mechanism 3 drives the headrest rod 21 and adapter 4 on one side to rotate back and forth relative to the mounting base 1, thereby driving the entire headrest support structure 2 to rotate back and forth relative to the mounting base 1.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A folding headrest for a deformable seat, characterized by: The invention comprises a mounting base (1) for being assembled on a seat back, and a headrest support structure (2) capable of being flipped forward and backward relative to the mounting base (1); the mounting base (1) is provided with a rotation drive mechanism (3) for driving the headrest support structure (2) to rotate forward and backward relative to the mounting base (1); The headrest support structure (2) includes a headrest rod (21), the upper portion of the headrest rod (21) is connected to a headrest (7), and the lower portion is provided with an adapter (4) that is rotatably matched with the mounting base (1); the rotation drive mechanism (3) includes a gear wheel (31) and a drive assembly arranged on the mounting base (1), the gear wheel (31) and the adapter (4) are fixedly connected, the center line of the gear wheel (31) coincides with the rotation center line of the adapter (4), and the drive assembly can drive the gear wheel (31) to rotate in the form of gear transmission.

2. The foldable headrest for a deformable seat according to claim 1, characterized in that: The lower portion of the headrest rod (21) is eccentrically fixed to the toothed disc (31) via an adapter (4); the adapter (4) is provided with an extension portion (41); the extension portion (41) is rotatably connected to the mounting base (1); and the rotation center of the extension portion (41) coincides with the center line of the toothed disc (31).

3. The foldable headrest for a deformable seat according to claim 2, characterized in that: The toothed disc (31) is located at the outer end of the side wall of the mounting base (1); a limiting column (6) extending into the mounting base (1) is fixedly provided at a position off-center of the toothed disc (31); and a limiting groove (1a) for limiting the range of movement of the limiting column (6) is provided on the side wall of the mounting base (1).

4. The foldable headrest for a deformable seat according to claim 3, characterized in that: The mounting base (1) is fixedly provided with a support shaft (5) extending in the width direction thereof, the support shaft (5) passes through the side of the mounting base (1) and extends outward, the toothed disc (31) is rotatably mounted on the support shaft (5), and the extension portion (41) is rotatably connected to the support shaft (5).

5. The foldable headrest for a deformable seat according to claim 4, characterized in that: The mounting base (1) is provided with a first side bracket (11) and a second side bracket (12) at both ends in the width direction, the toothed disc (31) is located outside the first side bracket (11), the driving assembly comprises a motor (32) arranged inside the first side bracket (11), the output shaft of the motor (32) passes through the outside of the first side bracket (11), a transmission gear (33) is fixedly sleeved on the output shaft of the motor (32), and the toothed disc (31) is provided with an annular tooth portion (a) meshing with the transmission gear (33) in the circumferential direction.

6. The foldable headrest for a deformable seat according to claim 5, characterized in that: The headrest rods (21) and adapters (4) are provided in two groups, and correspond one to one. The two groups of headrest rods (21) are symmetrically arranged on the outside of the first side bracket (11) and the second side bracket (12).

7. The foldable headrest for a deformable seat according to claim 2, characterized in that: The adapter (4) is fixedly connected to the toothed disc (31) via a pin (b).

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