Headrest folding mechanism

Abstract

The utility model discloses a headrest folding mechanism relates to the technical field of car seat, including setting on the casing drive part, the drive part is connected with the sliding block for folding headrest rod, the sliding block is connected with headrest rod connecting plate lower part, headrest rod connecting plate upper portion is connected with the pivot that sets on the casing, headrest rod connecting plate is connected with headrest rod, be equipped with vertical slide groove for locking and be equipped with the oblique slide groove for driving headrest rod connecting plate rotation on the sliding block, the utility model discloses compact structure, utilizes the inclined plane lever principle to realize folding with smaller driving force, effectively reduces the mechanism thickness, is applicable to the thin type seat backrest.

Description

Technical Field

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

[0002] Car seat headrests are essential components designed to improve passenger comfort and safety. In certain applications, such as autonomous driving, rest mode, or to increase rear passenger space, the headrests need to be folded forward. Existing headrest folding mechanisms mostly employ manual operation or complex linkage and gear transmission mechanisms, which suffer from inconvenience in operation, insufficient structural compactness, and large space occupation. This is especially true for modern car seats that prioritize a slim and lightweight design, where traditional folding mechanisms struggle to meet the limited installation space requirements.

[0003] Therefore, there is an urgent need for an automatic headrest folding mechanism that is compact, highly efficient in operation, and easy to control. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a headrest folding mechanism that is compact in structure, has high transmission efficiency, and occupies little space.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A headrest folding mechanism includes a drive unit disposed on a housing, the drive unit being connected to a slider for folding a headrest rod, the slider being connected to the lower part of a headrest rod connecting plate, the upper part of the headrest rod connecting plate being connected to a rotating shaft disposed on the housing, the headrest rod connecting plate being connected to a headrest rod, and the slider being provided with a vertical groove for locking and an oblique groove for driving the headrest rod connecting plate to rotate.

[0007] As a preferred embodiment of this invention, the driving unit is a lead screw motor, and the lead screw of the lead screw motor is connected to the slider.

[0008] As a preferred embodiment of this invention, the slider includes side plates symmetrically arranged on both sides, and the vertical slide groove and the oblique slide groove are arranged on the side plates.

[0009] As a preferred embodiment of this utility model, the lower part of the headrest rod connecting plate is provided with a pin, which is connected to the vertical slide groove and the oblique slide groove.

[0010] As a preferred embodiment of this invention, the vertical and oblique grooves are integrally formed continuous grooves. Due to the adoption of the above technical solution, the beneficial effects of this invention compared to the prior art are:

[0011] 1. The headrest folding mechanism of this utility model has a compact structure and small space occupation: the headrest guide rod is directly driven by a lead screw motor in conjunction with a slider with a special groove, which eliminates the complex linkage system and makes the thickness of the entire mechanism assembly very thin (for example, up to 46mm), which is particularly suitable for thin seat backs.

[0012] 2. The headrest folding mechanism of this utility model has low driving force and smooth operation: by utilizing the inclined lever principle of the inclined slide, the vertical downward driving force provided by the motor is effectively converted into rotational torque, so as to complete the headrest folding action with a small driving force, while reducing the requirements of the motor, resulting in low operating noise and smooth operation.

[0013] 3. The headrest folding mechanism of this utility model has reliable locking and clear functions: the headrest is reliably locked in the use position through the vertical slide groove, and the up and down position of the slider is precisely controlled by the electric control, realizing the precise switching between the two states of "locked" and "folded" of the headrest, with a high degree of automation. Attached Figure Description

[0014] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0015] Figure 1 This is a perspective view of an application example of this utility model;

[0016] Figure 2 This is a perspective view of the main structure of an application example of this utility model;

[0017] Figure 3 This is another perspective view of the main structure of the application example of this utility model;

[0018] The reference numerals in the drawings include: housing 1, drive unit 2, headrest rod 3, slider 4, headrest rod connecting plate 5, rotating shaft 6, lead screw 21, vertical slide groove 41, oblique slide groove 42, side plate 43, and pin 51. Detailed Implementation

[0019] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. It should be pointed out that all accompanying drawings are exemplary representations. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0023] Reference Figures 1 to 3 , Figure 1 This is a perspective view of an application example of this utility model. Figure 2 This is a perspective view of the main structure of this utility model application example, showing the headrest in the locked state. Figure 3This is another perspective view of the main structure of this utility model application example, showing the headrest folded forward. The headrest folding mechanism provided by this utility model includes a housing 1, a drive unit 2, a headrest rod 3, a slider 4, a headrest rod connecting plate 5, and a rotating shaft 6. The mechanism assembly is fixed above the seat back frame. The drive unit 2 is fixedly mounted on the housing 1. The drive unit 2 is connected to the slider 4 for folding the headrest rod 3. The slider 4 includes side plates 43 symmetrically arranged on both sides. The slider 4 is connected to the lower part of the headrest rod connecting plate 5, which is connected to the headrest rod 3. The upper part of the headrest rod connecting plate 5 is connected to the rotating shaft 6 mounted on the housing 1. The rotating shaft 6 is preferably a continuous shaft to achieve synchronous folding of the headrest. The slider 4 is provided with a vertical groove 41 for locking and an oblique groove 42 for driving the headrest rod connecting plate 5 to rotate. The vertical groove 41 and the oblique groove 42 are preferably provided on the side plate 43. The vertical groove 41 and the oblique groove 42 are integrally formed continuous grooves. The lower part of the headrest rod connecting plate 5 is provided with a pin 51, which is connected to the vertical groove 41 and the oblique groove 42. The driving unit 2 drives the slider 4 to move, and then the pin 51 moves within the vertical groove 41 and the oblique groove 42 to achieve locking and folding of the headrest. In one embodiment, the driving unit 2 is a lead screw motor, and the lead screw 21 of the lead screw motor is connected to the slider 4 to drive the slider 4 to move.

[0024] The following will refer to Figures 1 to 3 The working principle of this utility model will be explained.

[0025] Locked State: When the headrest needs to be in the normal use position, the drive unit 2 drives the slider 4 to move upward to the highest point or a specific position. At this time, the lower end of the headrest rod connecting plate 5 is located at the bottom of the vertical slide groove 41, and the pin 51 is located at the bottom of the vertical slide groove 41. Due to the restriction of the vertical slide groove 41, the headrest guide rod 3 cannot rotate freely, thus being reliably locked in the designed position.

[0026] Folding process: When the headrest needs to be folded forward, the controller issues a command, the drive unit 2 starts, and drives the slider 4 to move downward. When the pin 51 at the lower end of the headrest rod connecting plate 5 enters the inclined slide 42 from the vertical slide 41, due to the inclined surface of the inclined slide 32, the vertical motion of the slider 4 continuing to move downward is converted into a lateral thrust on the lower end of the headrest rod connecting plate 5. This thrust causes the headrest rod connecting plate 5 to rotate around the pivot 6, thereby driving the headrest (not shown in the figure) connected to the upper end of the headrest rod 3 to fold forward until the preset folding angle is reached.

[0027] Reset process: After the folding is completed, the drive unit 2 rotates in the opposite direction, driving the slider 4 to move upward. The pin 51 slides along the inclined surface of the inclined slide groove 32 and finally slides back into the vertical slide groove 31, realizing reset and locking.

[0028] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A headrest folding mechanism, characterized in that, It includes a drive unit mounted on the housing, the drive unit being connected to a slider for folding the headrest rod, the slider being connected to the lower part of a headrest rod connecting plate, the upper part of the headrest rod connecting plate being connected to a rotating shaft mounted on the housing, the headrest rod connecting plate being connected to a headrest rod, and the slider being provided with a vertical groove for locking and an oblique groove for driving the headrest rod connecting plate to rotate.

2. The headrest folding mechanism according to claim 1, characterized in that, The drive unit is a lead screw motor, and the lead screw of the lead screw motor is connected to the slider.

3. The headrest folding mechanism according to claim 1, characterized in that, The slider includes side plates symmetrically arranged on both sides, and the vertical slide groove and the oblique slide groove are arranged on the side plates.

4. The headrest folding mechanism according to claim 1, characterized in that, The headrest rod connecting plate is provided with a pin at the lower part, and the pin is connected to the vertical slide groove and the oblique slide groove.

5. A headrest folding mechanism according to claim 1, characterized in that, The vertical and oblique sluices are integrally formed continuous sluices.

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