A protection device for preventing stretch damage of elastic cloth of a leg rest of an automobile seat

Abstract

The utility model discloses a kind of protection devices of elastic cloth anti-stretching damage of automobile seat leg support, it is related to the technical field of automobile seat, including bottom plate, seat plate, fixedly connected on the upper end of bottom plate, and form sliding space between bottom plate;Extension plate, slidingly connected in sliding space;Lead screw elevator, fixedly connected in the lower end of bottom plate, for driving extension plate sliding;Extension rod, slidingly set below extension plate, extension plate sliding is driven by lead screw elevator simultaneously extension plate drives extension rod sliding.The utility model, by the ingenious design of F-shaped connecting rod mechanism, so that extension rod can produce a compound motion trajectory while extending outward with extension plate.This nonlinear compound motion can accurately match the natural expansion curve of elastic cloth, avoid elastic cloth from being excessively stretched when leg support is fully extended, thereby significantly reduce the wear and tear and tear risk of elastic cloth.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and more specifically to a protective device for preventing stretching damage to the elastic fabric of automotive seat leg rests. Background Technology

[0002] With the development of the automotive industry and the increasing demands of consumers for ride comfort, the functionality of car seats has been continuously enhanced. Among these, leg rests, as an important component for improving ride comfort, are widely used in various mid-to-high-end cars. Existing car seat leg rests mostly employ a linear or near-linear extension / retraction method. However, to improve ride comfort, aesthetics, or adaptability, many leg rests use elastic fabric, elastic mesh, or other elastic materials as coverings or connecting parts.

[0003] When the leg rest extends in a traditional straight line, the elastic fabric between its front support point and the seat body is subjected to continuous and significant stretching. Long-term, repeated overstretching can easily lead to elastic fatigue, deformation, wrinkling, or even fiber breakage or damage to the elastic fabric, thus shortening its lifespan, affecting the overall aesthetics of the seat, and potentially reducing the riding experience. Especially when the leg rest is fully extended, the tension of the elastic fabric reaches its maximum, making it most vulnerable to damage.

[0004] Therefore, it is necessary to propose a protective device for preventing stretching damage to the elastic fabric of car seat leg rests to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem that when the leg rest adopts the traditional straight extension method, the elastic cloth between the front support point and the seat body will be subjected to continuous and significant stretching.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution: A protective device for preventing stretching damage to the elastic fabric of a car seat leg rest, comprising a base plate. The seat plate is fixedly connected to the upper end of the base plate and forms a sliding space between the base plate and the base plate. The extension plate is slidably connected in the sliding space; The screw jack is fixedly connected to the lower end of the base plate and is used to drive the extension plate to slide. The extension rod is slidably positioned below the extension plate. The extension plate is driven to slide by a screw jack, and the extension plate simultaneously drives the extension rod to slide.

[0007] Furthermore, a second connecting plate is fixedly connected to the lower surface of the front end of the extension plate, and a first connecting plate is fixedly connected to the rear end of the second connecting plate. The first connecting plate is threadedly connected to the lead screw of the lead screw jack.

[0008] Furthermore, the front end of the base plate is symmetrically rotatably connected to two sets of F-shaped connecting rods. Each set of F-shaped connecting rods includes a first connecting rod rotatably connected to the front end of the base plate, and a second connecting rod and a third connecting rod rotatably connected to the first connecting rod. The ends of the second connecting rod and the third connecting rod away from the first connecting rod are respectively rotatably connected to the second connecting plate and the extension rod.

[0009] Furthermore, the second link is located in the middle of the first link.

[0010] Furthermore, the third link is located at the end of the second link that is furthest from the first link.

[0011] Furthermore, the first link, the second link, and the third link are F-shaped.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, through the ingenious design of the F-shaped linkage mechanism, enables the extension rod to generate a composite motion trajectory as it extends outward along with the extension plate. This non-linear composite motion can precisely match the natural stretch curve of the elastic fabric, preventing the elastic fabric from being overstretched when the leg support is fully extended, thereby significantly reducing the risk of wear and tear on the elastic fabric. Attached Figure Description

[0013] Fig. 1 This is a bottom view of the structure of this utility model.

[0014] Fig. 2 This is a three-dimensional schematic diagram of the structure of this utility model.

[0015] Fig. 3 This is a side view of the structure of this utility model.

[0016] Fig. 4 This is a three-dimensional schematic diagram of the connection structure excluding the base plate in this utility model.

[0017] Reference numerals: 1. Base plate; 2. Seat plate; 3. Screw jack; 4. First connecting plate; 5. Second connecting plate; 6. Extension plate; 7. First connecting rod; 8. Second connecting rod; 9. Third connecting rod; 10. Extension rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please seeFigs. 1 to 4 A protective device for preventing stretching damage to the elastic fabric of a car seat leg rest. The core of this device is to ensure that the elastic fabric under the leg rest is always in a reasonable tension state during the extension and retraction of the leg rest through a precise linkage mechanism, so as to avoid excessive stretching.

[0020] This protective device mainly includes a base plate 1, a seat plate 2, a screw jack 3, a first connecting plate 4, a second connecting plate 5, an extension plate 6, a first connecting rod 7, a second connecting rod 8, a third connecting rod 9, and an extension rod 10.

[0021] 1. Basic Support Structure: The base plate 1 is the mounting base of the entire device, typically fixed to the frame structure of the car seat. The seat plate 2 is fixedly connected to the upper end of the base plate 1, forming a precise sliding guide or sliding space between them. This sliding space guides and supports the linear reciprocating motion of the extension plate 6, ensuring its smooth extension and retraction. As shown in the figure, the relevant structure for the linear reciprocating motion of the extension plate 6 includes four sliding grooves, each containing four limiting rods fixed to the base plate 1.

[0022] 2. Drive Mechanism: The screw jack 3 is fixedly connected to the lower end of the base plate 1. The screw jack 3 is a commonly used linear motion conversion device, in which the internal screw can convert rotational motion into linear motion through rotation. In order to transmit the linear driving force of the screw jack 3 to the extension plate 6, a second connecting plate 5 is fixedly connected to the lower surface of the front end of the extension plate 6. A first connecting plate 4 is then fixedly connected to the rear end of the second connecting plate 5. The first connecting plate 4 is threadedly connected to the screw of the screw jack 3. When the screw jack 3 is working, its screw rotates and drives the nut or threaded part to move linearly, thereby pushing or pulling the extension plate 6 smoothly in the sliding space formed by the base plate 1 and the seat plate 2 through the first connecting plate 4 and the second connecting plate 5.

[0023] 3. Linkage Protection Mechanism – F-shaped Linkage Group: This is the innovation and key component of the invention. Two sets of F-shaped linkages are symmetrically rotatably connected to the front end of the base plate 1 to provide stable support and linkage effect. Each set of F-shaped linkages consists of the following three parts: First link 7: One end of it is rotatably connected to the front end of the base plate 1, serving as the reference rotation point for the entire F-shaped link assembly.

[0024] The second link 8 has one end rotatably connected to the first link 7. In a preferred embodiment, this connection point is located in the middle of the second link 8. The other end of the second link 8, away from the first link 7, is rotatably connected to the second connecting plate 5. Therefore, when the extension plate 6 slides through the second connecting plate 5, it drives the second link 8 to move, thereby driving the first link 7 to rotate around its hinge point with the base plate 1.

[0025] The third link 9: one end of which is also rotatably connected to the first link 7. According to a preferred embodiment, this connection point is located at the end of the second link 8 away from the first link 7. The other end of the third link 9 away from the first link 7 is rotatably connected to the extension rod 10.

[0026] 4. Cooperative movement of extension rod 10: Extension rod 10 is slidably positioned below extension plate 6. When the leg support is in operation, the screw jack 3 drives extension plate 6 to slide, and simultaneously, extension plate 6 drives F-shaped linkage mechanism to move via second connecting plate 5. Since third link 9 is connected to extension rod 10, the rotation and linkage of F-shaped linkage mechanism precisely guide the movement of extension rod 10.

[0027] Working principle: When the user activates the leg support extension function, the screw jack 3 starts working, its screw rotates and pushes the threaded first connecting plate 4 forward. The first connecting plate 4 drives the second connecting plate 5 and the extension plate 6 to slide forward along the sliding space, causing the leg support to gradually extend.

[0028] During this process, since the second connecting plate 5 is connected to the second link 8, the sliding of the extension plate 6 will force the second link 8 to move, thereby driving the first link 7 of the F-shaped linkage mechanism to rotate around its rotation point on the base plate 1. Since the other end of the third link 9 is connected to the extension rod 10, the rotation of the first link 7 will push the extension rod 10 forward through the third link 9.

[0029] This F-shaped linkage mechanism ensures that the movement trajectory of the extension rod 10 is not a simple straight line, but a complex curve. The elastic fabric on the leg rest is typically connected to the top front end of the extension plate 6 and the bottom front end of the extension rod 10. Through precise control of this F-shaped linkage, the displacement of the extension rod 10 can effectively compensate for the vertical tension generated by the elastic fabric during horizontal stretching, ensuring that the elastic fabric maintains optimal tension when the leg rest is extended to any position, avoiding overstretching and thus effectively preventing damage.

[0030] When the leg support retracts, the screw jack 3 reverses its operation, the extension plate 6 slides backward, the F-shaped linkage mechanism also moves in the opposite direction, the extension rod 10 is retracted, and the tension cloth returns to its initial state.

[0031] Advantages: This invention, by introducing a precise F-shaped linkage mechanism, achieves coordinated, non-linear motion between the leg support extension plate and the extension rod, perfectly solving the problem of easy damage to the elastic fabric in existing technologies. This design not only extends the service life of the elastic fabric and reduces maintenance costs, but more importantly, it improves the overall quality and comfort of the car seat, bringing users a better experience. The device has a reasonable structure, operates smoothly, and is easy to integrate into existing car seat designs.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. The scope of patent protection of this utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of this utility model shall also be included within the scope of protection of this utility model.

Claims

1. A protective device for preventing stretching damage to the elastic fabric of a car seat leg rest, characterized in that, Including the base plate, The seat plate is fixedly connected to the upper end of the base plate and forms a sliding space between the base plate and the base plate. The extension plate is slidably connected in the sliding space; The screw jack is fixedly connected to the lower end of the base plate and is used to drive the extension plate to slide. The extension rod is slidably positioned below the extension plate. The extension plate is driven to slide by a screw jack, and the extension plate simultaneously drives the extension rod to slide.

2. The protective device for preventing stretching damage to the elastic fabric of a car seat leg rest according to claim 1, characterized in that: A second connecting plate is fixedly connected to the lower surface of the front end of the extension plate, and a first connecting plate is fixedly connected to the rear end of the second connecting plate. The first connecting plate is threadedly connected to the lead screw of the screw jack.

3. The protective device for preventing stretching damage to the elastic fabric of a car seat leg rest according to claim 1, characterized in that: The front end of the base plate is symmetrically rotatably connected to two sets of F-shaped connecting rods. Each set of F-shaped connecting rods includes a first connecting rod rotatably connected to the front end of the base plate, and a second connecting rod and a third connecting rod rotatably connected to the first connecting rod. The ends of the second connecting rod and the third connecting rod away from the first connecting rod are respectively rotatably connected to the second connecting plate and the extension rod.

4. The protective device for preventing stretching damage to the elastic fabric of a car seat leg rest according to claim 3, characterized in that: The second link is located in the middle of the first link.

5. The protective device for preventing stretching damage to the elastic fabric of a car seat leg rest according to claim 4, characterized in that: The third link is located at the end of the second link that is furthest from the first link.

6. The protective device for preventing stretching damage to the elastic fabric of a car seat leg rest according to claim 5, characterized in that: The first link, the second link, and the third link are in an F-shape.

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