A seat headrest folding mechanism

Abstract

This utility model discloses a seat headrest folding mechanism, including a headrest connecting frame for connecting the headrest and a seat back connecting frame for connecting the seat back. The headrest connecting frame is rotatably connected to the seat back connecting frame via a first rotating shaft, and the seat back connecting frame is rotatably connected to a lock via a second rotating shaft. A stop pin for locking the lock tongue of the lock and the headrest connecting frame is provided on the seat back connecting frame. The first rotating shaft and the stop pin are connected by a first rotary spring, and the second rotating shaft and the stop pin are connected by a second rotary spring. This application utilizes the elastic force of the first and second rotary springs to adjust the position of the headrest connecting frame by the lock and the stop pin. The headrest is folded and reset by pulling the component and directly pressing the headrest connecting frame. At the same time, the overall structure is simple and easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of seat technology for light aircraft and automobiles, and in particular to a seat headrest folding mechanism. Background Technology

[0002] When light aircraft and automobiles require folding headrests, a mechanism is needed to quickly fold and reposition the headrests. In particular, light aircraft have high weight requirements, so the folding mechanism needs to be lightweight and simple. Existing headrest mechanisms are often too complex and not suitable for direct application to light aircraft. Therefore, this application proposes a solution to address this need. Summary of the Invention

[0003] Purpose of the utility model: The purpose of this utility model is to provide a seat headrest folding mechanism with a simple structure that can be quickly folded and reset.

[0004] Technical Solution: The present invention discloses a seat headrest folding mechanism, comprising a headrest connecting frame for connecting the headrest and a seat back connecting frame for connecting the seat back. The headrest connecting frame is rotatably connected to the seat back connecting frame via a first rotating shaft. The seat back connecting frame is rotatably connected to a lock via a second rotating shaft. The seat back connecting frame is provided with a stop pin for locking the lock tongue of the lock and the headrest connecting frame. The first rotating shaft and the stop pin are connected via a first rotary spring, and the second rotating shaft and the stop pin are connected via a second rotary spring.

[0005] By pressing down on the lock head, the lock head rotates around the second pivot, releasing the latch of the headrest connecting frame. Under the action of the first rotary spring, the headrest connecting frame rotates around the first pivot, causing the headrest to press down and fold. When the headrest is folded, pressing down on the headrest connecting frame causes it to rotate in the opposite direction around the first pivot, pressing the lock head down until it is stopped by the stop pin. At this point, the lock head rotates back to its original position under the action of the second spring, locking the latch between the lock head and the stop pin, thus opening the headrest.

[0006] Preferably, when the headrest connecting frame and the seat back connecting frame are in the locked state, and the headrest is in the open state, the locking tongue of the headrest connecting frame is located between the stop pin and the lock head.

[0007] Preferably, when the headrest is in the folded headrest state, the locking tongue of the headrest connecting frame is located above the lock head and abuts against the upper surface of the lock head.

[0008] Preferably, the contact surfaces of the lock head and the locking tongue of the headrest connecting frame are both arc surfaces.

[0009] The arc-shaped structure of the lock head allows the headrest connecting frame to press down the lock head during reset, preventing it from jamming.

[0010] Preferably, the center of the first rotary spring is wound around the first rotating shaft, one end of the first rotary spring is connected to a stop pin, and the other end is connected to the locking tongue of the headrest connecting frame.

[0011] The first rotary spring is used to drive the headrest connecting bracket to press down the headrest when the lock is unlocked, causing the headrest to fold.

[0012] Preferably, the center of the second rotary spring is wound around the second shaft, with one end of the second rotary spring connected to a stop pin and the other end connected to a lock.

[0013] The second rotary spring is used to drive the lock head to rotate and reset.

[0014] Preferably, the first pivot, the second pivot, and the stop pin are positioned on the seat back connecting frame by a cotter pin.

[0015] Preferably, the tail of the lock head is provided with a pulling component for pulling the lock head to rotate around the second pivot.

[0016] Preferably, the pulling component is a ball screw or a pull rope.

[0017] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0018] This application utilizes the elastic force of the first and second rotary springs to adjust the position of the headrest connecting frame by the locking head and the stop pin. The headrest can be folded and reset by pulling the component and directly pressing the headrest connecting frame. At the same time, the overall structure is simple and easy to operate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the folding mechanism of this application.

[0020] Figure 2 This is an exploded view of the folding mechanism of this application.

[0021] Figure 3 This is an internal cross-sectional view of the folding mechanism of this application.

[0022] Figure 4 This is a schematic diagram of the folding steps of the folding mechanism of this application.

[0023] Figure 5 This is a schematic diagram of the reset steps of the folding mechanism in this application.

[0024] Figure 6 These are schematic diagrams of two operating mechanisms for the folding mechanism of this application. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0026] Example 1

[0027] See appendix Figures 1-3 Figure 1 shows a seat headrest folding mechanism of the present invention, including a headrest connecting frame 1 for connecting the headrest and a seat back connecting frame 2 for connecting the seat back. The headrest connecting frame 1 is rotatably connected to the seat back connecting frame 2 via a first rotating shaft 5. The seat back connecting frame 2 is rotatably connected to a lock head 3 via a second rotating shaft 6. The seat back connecting frame 2 is provided with a stop pin 4 for locking the lock head 3 and the lock tongue of the headrest connecting frame 1. The first rotating shaft 5 and the stop pin 4 are connected by a first rotary spring 7, and the second rotating shaft 6 and the stop pin 4 are connected by a second rotary spring 8.

[0028] In this embodiment, when the headrest connecting frame 1 and the seat back connecting frame 2 are in the locked state, and the headrest is in the open state, the locking tongue of the headrest connecting frame 1 is located between the stop pin 4 and the lock head 3.

[0029] In this embodiment, when the headrest connecting frame 1 is in the folded headrest state, the locking tongue of the headrest connecting frame 1 is located above the lock head 3 and abuts against the upper end face of the lock head 3.

[0030] In this embodiment, the contact surfaces of the lock head 3 and the locking tongue of the headrest connecting frame 1 are both arc surfaces, which makes it easy for the headrest connecting frame to press down the lock head 3 when resetting, thus avoiding jamming.

[0031] In this embodiment, the center of the first rotary spring 7 is wound around the first rotating shaft 5. One end of the first rotary spring 7 is connected to the stop pin 4, and the other end is connected to the locking tongue of the headrest connecting frame 1. When the lock head 3 is unlocked, the first rotary spring 5 drives the headrest connecting frame 1 to press down the headrest, so that the headrest is folded.

[0032] In this embodiment, the center of the second rotary spring 8 is wound around the second rotating shaft 6. One end of the second rotary spring 8 is connected to the stop pin 4, and the other end is connected to the lock head 3. The second rotary spring 8 is used to drive the lock head 3 to rotate and reset.

[0033] In this embodiment, the first rotating shaft 5, the second rotating shaft 6, and the stop pin 7 are positioned on the seat back connecting frame 2 by the cotter pin 10.

[0034] Example 2

[0035] See appendix Figure 4 In this embodiment, when the headrest is folded forward, the locking head 3 is pressed down, and the locking head 3 rotates around the second rotating shaft 6. The locking tongue of the headrest connecting frame 1 is unlocked from the locking head 3. Under the action of the first rotary spring 7, the headrest connecting frame 1 rotates around the first rotating shaft 5, causing the headrest to fold. At this time, the locking head 3 is released, and under the action of the second rotary spring 8, the locking head 3 returns to its original position. At this time, the lower end of the locking tongue of the headrest connecting frame 1 abuts against the upper end face of the locking head 3.

[0036] Example 3

[0037] See appendix Figure 5 In this embodiment, when resetting the headrest, the headrest connecting frame 1 is pressed down, and the headrest connecting frame 1 rotates around the first rotating shaft 5. The locking tongue of the headrest connecting frame 1 presses the locking head 3 to rotate around the second rotating shaft 6 until the locking tongue is limited by the stop pin 4. At this time, the locking head 3 rotates back to reset under the action of the second rotary spring 8, locking the locking tongue between the locking head 3 and the stop pin 4, thereby realizing the reset of the headrest.

[0038] Example 4

[0039] See appendix Figure 6 In this embodiment, the tail of the lock head 3 is provided with a pulling component for pulling the lock head 3 to rotate around the second rotating shaft 6. The pulling component can be a ball screw 9 or a pull rope 11.

Claims

1. A folding mechanism for a headrest of a seat, comprising a headrest connecting frame (1) connected to a headrest and a seat back connecting frame (2) connected to a seat back, characterized in that: The headrest connecting frame (1) is rotatably connected to the seat back connecting frame (2) via a first rotating shaft (5). The seat back connecting frame (2) is rotatably connected to the lock head (3) via a second rotating shaft (6). The seat back connecting frame (2) is provided with a stop pin (4) for locking the lock head (3) and the locking tongue of the headrest connecting frame (1). The first rotating shaft (5) and the stop pin (4) are connected by a first rotary spring (7). The second rotating shaft (6) and the stop pin (4) are connected by a second rotary spring (8).

2. A seat headrest folding mechanism according to claim 1, characterized in that: The headrest connecting frame (1) and the seat back connecting frame (2) are in a locked state. When the headrest is open, the locking tongue of the headrest connecting frame (1) is located between the stop pin (4) and the lock head (3).

3. A seat headrest folding mechanism according to claim 1, wherein: When the headrest is in the folded headrest state, the locking tongue of the headrest connecting frame (1) is located above the lock head (3) and abuts against the upper end face of the lock head (3).

4. The seat headrest folding mechanism of claim 1, wherein: The contact surfaces of the lock head (3) and the lock tongue of the headrest connecting frame (1) are both arc surfaces.

5. A seat headrest folding mechanism according to claim 1, characterized in that: The center of the first rotary spring (7) is wound around the first rotating shaft (5). One end of the first rotary spring (7) is connected to the stop pin (4), and the other end is connected to the locking tongue of the headrest connecting frame (1).

6. A seat headrest folding mechanism according to claim 1, wherein: The center of the second rotary spring (8) is wound around the second rotating shaft (6). One end of the second rotary spring (8) is connected to the stop pin (4), and the other end is connected to the lock head (3).

7. A seat headrest folding mechanism according to claim 1, wherein: The first pivot (5), the second pivot (6) and the stop pin (4) are positioned on the seat back connecting frame (2) by a cotter pin (10).

8. The seat headrest folding mechanism of claim 1, wherein: The tail of the lock head (3) is provided with a pulling component for pulling the lock head (3) to rotate around the second rotating shaft (6).

9. A seat headrest folding mechanism according to claim 8, wherein: The pulling component is a ball screw (9) or a pull rope (11).

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