High-reliability automobile tail door switch

Abstract

The utility model discloses a high-reliability automobile tail door switch which comprises a shell and a base, a face cover is integrally formed on the shell in an injection molding mode, a pressing hole is formed in the middle of the face cover, a pressing sliding block is arranged in the shell and located below the pressing hole, and a microswitch is arranged below the pressing sliding block. Rubber is arranged in an inner cavity of the shell and is of a cylindrical structure with the closed upper end, and the side wall of the rubber is matched with the inner wall of the shell in shape and attached to the inner wall of the shell. The rubber is fixedly connected with the shell and the pressing sliding block through secondary injection molding. The automobile tail door switch is simple in structure, good in waterproofness and good in switch reliability, and can be widely applied to the field of automobile tail door switches.

Description

Technical Field

[0001] The utility model relates to the field of automotive switches, in particular to a highly reliable automotive tailgate switch. Background Art

[0002] The automotive tailgate switch is used to open the automotive tailgate and is installed on the tailgate sheet metal. Since the pressing part of the automotive tailgate switch is exposed outside the vehicle, its sealing performance and durability are particularly high. All existing automotive tailgate switches use a whole piece of rubber to wrap the outside of the switch. As shown in Figure 7 , the button is placed inside the rubber. Pressing the rubber causes the rubber to deform and press the button inside, realizing the conduction of the switch circuit signal. Due to the large area of the rubber and its long-term exposure outside, it is prone to deformation over time, resulting in local bulges or depressions, which affects normal operation. At the same time, due to the large size of the rubber, it is inconvenient to perform secondary injection molding with the housing. Usually, it is connected to the housing by an assembly method, which requires a series of sealing structures to ensure the sealing performance of the switch. Therefore, the structure is relatively complex and the assembly accuracy requirement is high. In addition, to meet the waterproof requirement, the existing switches are all closed structures. The gas inside the switch is affected by the external temperature, causing thermal expansion and contraction, which will cause the rubber to deform. For example, when heated, the rubber will bulge outwards, increasing the distance from the button, making it difficult to press and open. When the air temperature drops, the air contracts, driving the rubber to compress inwards, which may trigger the button to open automatically, posing a safety hazard. Therefore, the existing structure of the automotive tailgate switch is prone to abnormal opening of the automotive tailgate switch and the risk of switch failure. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a highly reliable automotive tailgate switch to solve the problem of easy failure of the existing automotive tailgate switch.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a highly reliable automotive tailgate switch, including a housing and a base. The housing is integrally injection molded with a face cover. A pressing hole is opened in the middle part of the face cover. A pressing slider is arranged below the pressing hole inside the housing, and a micro switch is arranged below the pressing slider. A rubber is arranged inside the inner cavity of the housing. The rubber is a cylindrical structure with a closed upper end. The side wall of the rubber is adapted to the inner wall of the housing and fits on the inner wall of the housing.

[0005] To ensure the sealing performance, at the same time, reduce the assembly process and lower the production cost, the rubber is fixedly connected to the housing and the pressing slider by secondary injection molding.

[0006] To facilitate pressing, a button is arranged in the pressing hole, and the button is fixedly adhered to the rubber.

[0007] To ensure the sealing performance of the base and the outer shell, a circular boss is provided on the base, and a stepped surface that mates with the end face of the circular boss is provided on the inner wall of the outer shell. The open end of the rubber is provided with an outward-turned edge, and the outward-turned edge is pressed against the stepped surface.

[0008] Furthermore, a sealing concave ring is provided on the outward-turned edge, and a circular sealing rib placed inside the sealing concave ring is provided on the end face of the circular boss.

[0009] To ensure that the air pressure inside the switch is consistent with the outside, an air passage connected to the outside is provided inside the base, and a breathable membrane is attached to the outlet end of the air passage.

[0010] To prevent the switch from malfunctioning due to changes in air pressure inside the switch, a protection spring is provided between the pressing slider and the micro switch.

[0011] Advantages of the present utility model: By using two-shot injection molding to place the rubber inside the outer shell, the present utility model avoids exposure to the outside, effectively slows down the aging and failure of the rubber, and improves the service life of the switch. The rubber is combined with the outer shell and the pressing slider by two-shot injection molding, which not only reduces the assembly process and saves costs, but also effectively solves the problem of poor waterproof effect caused by gaps in the assembly of parts. The matching structure of the base, the outer shell and the rubber has good sealing performance. The protection spring can effectively solve the problem of pressure difference between the inside and outside of the switch caused by high and low temperatures, which may lead to rubber bulging or button collapse. The matching structure of the breathable membrane and the breathable hole can effectively solve the problem of inconsistent air pressure difference between the inside and outside of the switch while ensuring waterproofness. Therefore, the switch of the present utility model has better waterproof performance, and will not malfunction due to internal and external pressure differences, and has reliable performance.

[0012] The following will combine the drawings and embodiments to provide a more detailed description of the present utility model. Description of the Drawings

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0014] Figure 2 is a front view of the present utility model.

[0015] Figure 3 is Figure 2 a cross-sectional view taken along A-A in

[0016] Figure 4 is Figure 3 a partial enlarged view of C in

[0017] Figure 5 is a right view of the present utility model.

[0018] Figure 6For Figure 5 The sectional view taken along line B-B in

[0019] Figure 7 is the sectional view of an existing tailgate switch. Detailed implementation manners

[0020] Embodiment, as Figures 1 to 6 shown, a highly reliable automotive tailgate switch includes a housing 1 and a base 2, and the housing 1 and the base 2 are fixedly connected by bolts. A circular boss 21 is provided on the base 2, a circuit board 10 is arranged inside the circular boss 21, a microswitch 5 is arranged on the circuit board 10, a pressing ejector rod is arranged on the microswitch 5, and when the ejector rod is pressed down, the microswitch 5 is triggered to conduct.

[0021] To improve the sealing performance and reduce the assembly process, a face cover 3 is integrally injection-molded on the housing 1. A pressing hole 31 is formed in the middle of the face cover 3. A pressing slider 4 is arranged below the pressing hole 31 inside the housing 1. The pressing slider 4 acts on the microswitch 5 to drive the movement of the ejector rod of the microswitch 5. A rubber 6 is formed by secondary injection molding in the inner cavity of the housing 1, and the rubber 6 preferably adopts TPE rubber. The top surface of the pressing slider 4 is fixedly formed on the rubber 6 by secondary injection molding. The rubber 6 is a cylindrical structure with a sealed upper end. The side wall of the rubber 6 is adapted to the inner wall of the housing 1 and fits on the inner wall of the housing 1, thereby ensuring the sealing performance.

[0022] To facilitate pressing, a button 7 is arranged in the pressing hole 31, and the button 7 is fixedly adhered to the rubber 6.

[0023] To improve the sealing performance between the housing 1 and the base 2, a step surface 11 matching the end face of the circular boss 21 is arranged on the inner wall of the housing 1. An outward-turned edge 61 is arranged at the open end of the rubber 6, and the outward-turned edge 61 is pressed on the step surface 11. At the same time, a sealing concave ring 62 is arranged on the outward-turned edge 61, and a circular sealing rib 22 placed in the sealing concave ring 62 is arranged on the end face of the circular boss 21; when the assembly is in place, the circular sealing rib 22 is pressed into the sealing concave ring 62, and then the housing 1 and the base 2 are fixed by bolts to ensure the sealing performance.

[0024] While ensuring waterproofness, in order to solve the problem of rubber 6 bulging or button collapse caused by the inconsistency between the heated air pressure inside the switch and the outside world, a protective spring 9 is provided between the pressing slider 4 and the micro switch 5. When the internal air pressure is smaller than the external air pressure, the micro switch 5 will not be triggered to work under the action of the protective spring 9, thereby effectively avoiding the problem of the switch opening automatically. At the same time, an air duct 23 connected to the outside world is provided in the base 2, and a breathable membrane 8 is attached to the outlet end of the air duct 23. The internal air is connected to the outside world through the breathable membrane 8 and the air duct 23, thereby ensuring that the internal and external air pressures are consistent, and there will be no bulging or depression problems. The outlet diameter of the air duct 23 is 0.8 mm, and the breathable membrane 8 is made of polytetrafluoroethylene with model number Y-68W017 produced by Taihua Rubber (Volkswagen) Co., Ltd.

[0025] The above is an exemplary description of the utility model in combination with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A high-reliability automobile tailgate switch, comprising a housing (1) and a base (2), characterized in that: The shell (1) is integrally injection-molded with a cover (3), a pressing hole (31) is provided in the middle of the cover (3), a pressing slider (4) is provided below the pressing hole (31) in the shell (1), and a micro switch (5) is provided below the pressing slider (4); a rubber (6) is provided in the inner cavity of the shell (1), the rubber (6) is a cylindrical structure with a sealed upper end, and the side wall of the rubber (6) is adapted to the shape of the inner wall of the shell (1) and is attached to the inner wall of the shell (1).

2. The high reliability automobile tailgate switch according to claim 1, characterized in that: The rubber (6) is fixedly connected to the housing (1) and the pressing slider (4) through secondary injection molding.

3. The high reliability automobile tailgate switch according to claim 1, characterized in that: A button (7) is arranged in the pressing hole (31), and the button (7) is fixed on the rubber (6) by gluing.

4. The high reliability automobile tailgate switch according to claim 1, characterized in that: The base (2) is provided with an annular boss (21), the inner wall of the housing (1) is provided with a step surface (11) that matches the end surface of the annular boss (21), and the open end of the rubber (6) is provided with an outer flange (61), which is pressed on the step surface (11).

5. The high reliability automobile tailgate switch according to claim 4, characterized in that: A sealing concave ring (62) is arranged on the outer flange (61), and an annular sealing rib (22) disposed in the sealing concave ring (62) is arranged on the end surface of the annular boss (21).

6. The high reliability automobile tailgate switch according to claim 1, characterized in that: An air passage (23) connected to the outside is arranged inside the base (2), and a breathable membrane (8) is attached to the outlet end of the air passage (23).

7. The high reliability automobile tailgate switch according to claim 1, characterized in that: A protection spring (9) is provided between the pressing slider (4) and the micro switch (5).

Images