Multi-position active locking inertia lock for vehicle

Abstract

The utility model discloses a kind of vehicle inertia locks with multiple position active locking, it is related to automobile parts technical field, including locking rack, locking piece, the locking piece is installed on fixed plate by pivot, one end of the locking piece is equipped with the pinion engagement with the locking rack, reset tension spring is connected between the locking piece and fixed plate, the reset tension spring provides the reset force for the locking piece to make its pinion disengage locking rack;Normal state, reset tension spring makes the locking piece separate from locking rack, headrest can be adjusted freely before and after;When vehicle emergency brake or collision, locking piece rotates around pivot under the action of inertia, pinion engages with locking rack, forms self-locking, effectively prevents headrest backward, realizes multiple position active protection.The utility model is simple and compact in structure, high in modular degree, convenient to assemble and maintain, and good in reliability.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an inertial lock for vehicles that can be actively locked in multiple positions. Background Technology

[0002] With the development of the automotive industry, people's demands for ride safety and comfort are increasing, and in-vehicle headrests with fore-and-aft adjustment functions have become an important feature to enhance the driving and riding experience. However, in the event of emergency braking or a collision, the enormous inertia of such headrests may cause them to unexpectedly retract relative to the frame (i.e., "automatic return"), which weakens their support and protection for the occupant's head and neck, posing a safety hazard. In existing technologies, the locking structure of some headrests may be relatively complex, or they may not be able to reliably and quickly lock at any fore-and-aft adjustment position during an impact, resulting in unstable protective effects.

[0003] Therefore, there is an urgent need for a vehicle inertial lock that is simple in structure, reliable, and capable of active locking in multiple positions to cope with emergency situations. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a vehicle inertial lock with a simple and modular structure that can reliably lock in multiple forward and backward adjustment positions of the headrest, preventing the headrest from retracting during emergency braking or collisions and improving active protection capabilities.

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

[0006] A multi-position active locking vehicle inertial lock includes a locking rack and a locking plate. The locking plate is mounted on a fixed plate via a pivot. One end of the locking plate is provided with small teeth that can mesh with the locking rack. A return spring is connected between the locking plate and the fixed plate. The return spring provides a return force to the locking plate to disengage its small teeth from the locking rack.

[0007] As a preferred embodiment of this utility model, the locking piece is provided with a limiting groove, and the fixing plate is provided with a limiting post corresponding to the limiting groove.

[0008] As a preferred embodiment of this invention, it further includes a buffer pin, which is fixedly disposed on the fixing plate and is used to limit the initial position of the locking piece in the non-locking state.

[0009] As a preferred embodiment of this utility model, the locking plate is provided with a tension spring mounting hole, and one end of the reset tension spring is connected to the tension spring mounting hole.

[0010] As a preferred embodiment of this utility model, the fixing plate is provided with a pin, and one end of the reset spring is connected to the pin.

[0011] As a preferred embodiment of this invention, the locking rack is fixedly connected to the front shell of the car seat headrest.

[0012] As a preferred embodiment of this invention, the fixing plate is fixedly connected to the frame of the car seat headrest.

[0013] As a preferred embodiment of this invention, the buffer nail is a rubber nail.

[0014] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are:

[0015] 1. The present invention provides a multi-position active locking vehicle inertial lock, which features multi-position active locking: the locking rack is linked to the front shell of the headrest, and no matter what position the headrest is adjusted to, when a large overload occurs, the locking plate can quickly engage with the nearest tooth on the locking rack under the action of inertia, thereby achieving effective locking and preventing the headrest from rolling back.

[0016] 2. The present invention provides a vehicle inertial lock that can be actively locked in multiple positions. The structure is simple and reliable: The present invention achieves the locking function through the ingenious cooperation of a small number of components such as locking plate, limiting post, and reset spring. The structure is compact, the operation is reliable, and the manufacturing cost is low.

[0017] 3. The present invention provides a multi-position active locking vehicle inertial lock with a modular design: the entire locking mechanism (locking plate, fixing plate, return spring, etc.) can be pre-assembled into a module, which greatly facilitates the assembly process with the headrest frame and front shell, and also facilitates later maintenance and replacement.

[0018] 4. This utility model provides a vehicle inertial lock that can be actively locked in multiple positions, which is an industry first: the arrangement structure simply and effectively solves the problem of applicability of inertial locking in multiple positions, and has good market application prospects. Attached Figure Description

[0019] 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:

[0020] Figure 1 This is a perspective view of the present invention in its unlocked state;

[0021] Figure 2 This is another perspective view of the present invention in its unlocked state;

[0022] Figure 3 This is a perspective view of the present invention in the locked state;

[0023] Figure 4 This is another perspective view of the present invention in the locked state;

[0024] The reference numerals in the attached drawings include: locking rack 1, locking plate 2, rotating shaft 3, fixing plate 4, reset tension spring 5, buffer pin 6, small tooth 21, limiting groove 22, tension spring mounting hole 23, limiting post 41, pin 42, and screw 43. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0029] Reference Figures 1 to 4 , Figure 1 This is a perspective view of the present invention in its unlocked state. Figure 2 This is another perspective view of the present invention in its unlocked state. Figure 3 This is a perspective view of the present invention in the locked state. Figure 4This is another perspective view of the present invention in its locked state. The present invention provides a multi-position actively locking vehicle inertial lock, described in detail with an example of its installation on a car seat headrest. The present invention includes a locking rack 1, a locking plate 2, a rotating shaft 3, a fixing plate 4, a return spring 5, and a buffer pin 6. The locking rack 1 is fixedly connected to the front shell (not shown) of the car seat headrest. The fixing plate 4 is fixedly connected to the frame (not shown) of the car seat headrest by screws 43. The core component of the present invention is integrated on the fixing plate 4, that is, the locking plate 2 is mounted on the fixing plate 4 via the rotating shaft 3. One end of the locking plate 2 has small teeth 21 that can mesh with the locking rack 1. A return spring 5 is connected between the locking plate 2 and the fixing plate 4. More specifically, the locking plate 2 has spring mounting holes 23. One end of the return spring 5 is connected to the spring mounting hole 23. The fixing plate 4 is provided with a pin 42. The other end of the return spring 5 is connected to the pin 42. The return spring 5 provides a return force to the locking plate 2 to disengage its small teeth 21 from the locking rack 1. Under normal conditions (without inertial force), the tension of the return spring 5 causes the locking plate 2 to rotate counterclockwise. At this time, the small teeth 21 at the front end of the locking plate 2 remain separated from the teeth of the locking rack 1. When the headrest needs to be adjusted forward and backward, the front shell drives the locking rack 1 to move forward and backward. Since the small teeth 21 of the locking plate 2 are in a separated state, the adjustment process is smooth and without interference. When the vehicle brakes suddenly or collides, the locking plate 2 rotates around the pivot 3 under the action of inertia. The small teeth 21 at the front end of the locking plate 2 mesh with the locking rack 1 to form a self-locking mechanism, effectively preventing the headrest from moving backward and achieving multi-position active protection.

[0030] In one specific embodiment, the locking plate 2 is provided with a limiting groove 22, and the fixing plate 4 is provided with a limiting post 41 corresponding to the limiting groove 22. When the vehicle brakes suddenly or collides, the locking plate 2 rotates around the rotating shaft 3 under the action of inertia, and its limiting groove 22 contacts and locks with the limiting post 41. The small tooth 21 at the front end of the locking plate 2 meshes with the locking rack 1 to form a more stable self-locking mechanism.

[0031] In another specific embodiment, the present invention also includes a buffer pin 6, which is fixedly disposed on the fixed plate 4 and is used to limit the initial position of the locking piece 2 in the non-locked state. The buffer pin 6 is a rubber pin, which serves both as an initial limiting function and as a collision buffer function, while also preventing abnormal noise.

[0032] The following will refer to Figures 1 to 4 The working principle of this utility model will be explained.

[0033] When the vehicle brakes suddenly or collides, it generates a huge forward inertia. The entire locking mechanism (fixed to the frame) decelerates along with the vehicle body. The locking plate 2, as a movable mass block, will overcome the tension of the return spring 5 under the action of inertial torque and rotate around the rotating shaft 3. During the rotation, the limiting groove 22 on the locking plate 2 will contact and lock with the limiting post 41 fixed on the fixed plate 4. At this time, the small tooth 21 at the front end of the locking plate 2 is just embedded in the tooth groove of the locking rack 1. That is, the small tooth 21 meshes with any nearest tooth of the locking rack 1, realizing meshing in multiple positions.

[0034] Once engaged, if the locking rack 1 tends to move backward (i.e., the headrest tends to retract), it will cause the locking plate 2 to continue rotating. However, this tendency will be prevented by the cooperation of the limiting post 41 and the limiting groove 22 and the engagement of the small tooth 21 with the locking rack 1, thus forming a self-locking effect, firmly locking the locking rack 1, thereby preventing the front shell of the headrest from moving backward, and achieving active protection in multiple positions.

[0035] After the impact ends, under the action of the return spring 5, the locking plate 2 rotates, the pinion 21 disengages from the locking rack 1, and the mechanism returns to its original state. Figure 1 In the unlocked state shown, the headrest can be adjusted forward and backward normally.

[0036] 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 vehicle inertial lock capable of active locking in multiple positions, characterized in that, It includes a locking rack and a locking plate. The locking plate is mounted on a fixed plate via a rotating shaft. One end of the locking plate is provided with small teeth that can mesh with the locking rack. A return spring is connected between the locking plate and the fixed plate. The return spring provides a return force to the locking plate to disengage its small teeth from the locking rack.

2. The vehicle inertial lock with multi-position active locking according to claim 1, characterized in that, The locking plate is provided with a limiting groove, and the fixing plate is provided with a limiting post corresponding to the limiting groove.

3. A vehicle inertial lock capable of multi-position active locking according to claim 1, characterized in that, It also includes a buffer pin, which is fixedly mounted on the fixing plate and is used to limit the initial position of the locking piece in the unlocked state.

4. A vehicle inertial lock capable of multi-position active locking according to claim 1, characterized in that, The locking plate is provided with a tension spring mounting hole, and one end of the reset tension spring is connected to the tension spring mounting hole.

5. A vehicle inertial lock capable of multi-position active locking according to claim 1, characterized in that, The fixing plate is provided with a pin, and one end of the reset spring is connected to the pin.

6. A vehicle inertial lock capable of multi-position active locking according to claim 1, characterized in that, The locking rack is fixedly connected to the front shell of the car seat headrest.

7. A vehicle inertial lock capable of multi-position active locking according to claim 1, characterized in that, The fixing plate is fixedly connected to the frame of the car seat headrest.

8. A vehicle inertial lock capable of multi-position active locking according to claim 3, characterized in that, The buffer pin is a rubber pin.

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