Drop-off failure prevention of a microswitch

Abstract

The utility model discloses a kind of light touch switches of falling anti-failure, it is related to electronic component technical field.It includes support and base, support is rectangular groove body, support front end is equipped with positioning hole, support left side bottom interval is equipped with two first support feet, support right side bottom interval is equipped with two second support feet, first support foot and second support foot respectively extend outward and present 90 degrees bending, support rear end is equipped with limit baffle;Base is located in support, base front end movably connects with the pressing handle of silica gel material, pressing handle passes through positioning hole, base front end is also equipped with multiple fixed columns, multiple electrically-conductive terminals are installed in base, electrically-conductive terminal is equipped with terminal pin, terminal pin extends backward and presents 90 degrees bending, terminal pin is brass material, and its surface is covered with gold plating layer by electroplating process.The utility model reduces the probability that light touch switch appears functional failure or damage due to falling, avoids short circuit of positive and negative electrode conduction of soldering pin.

Description

Technical Field

[0001] This utility model relates to the field of electronic components technology, and in particular to a tactile switch with drop-proof failure protection. Background Technology

[0002] Tactile switches are common electronic switches that momentarily switch circuits on and off by pressing a button. They are widely used in electronic devices. During use, tactile switches may be impacted by accidental drops. Some tactile switches on the market are prone to structural damage upon impact, such as broken casings, deformed buttons, and bent pins. This damage affects the electrical and mechanical performance of the tactile switch, leading to abnormal electrical functions, button jamming, or abnormal loosening, rendering the tactile switch unusable. Furthermore, some tactile switches on the market use silver-plated solder leads. However, in high-temperature and high-humidity environments, silver ions migrate from the anode (positive electrode) to the cathode (negative electrode), where they are reduced and deposited. The deposited silver forms dendritic crystals that gradually extend towards the positive electrode, eventually forming conductive silver whiskers, causing a short circuit between the positive and negative electrodes. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a drop-proof tactile switch, which reduces the probability of tactile switch malfunctioning or being damaged due to drops, and avoids short circuits caused by the positive and negative terminals of the solder pins being connected.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A drop-resistant tactile switch includes a bracket and a base. The bracket is a rectangular groove with a positioning hole at the front end. Two first support feet are spaced apart on the bottom left side of the bracket, and two second support feet are spaced apart on the bottom right side of the bracket. The first and second support feet extend outward and bend at 90 degrees. A limiting baffle is provided at the rear end of the bracket. The base is located inside the bracket. A silicone push handle is movably connected to the front end of the base. The push handle passes through the positioning hole. The front end of the base also has multiple fixing posts, which are fixedly connected to the bracket. Multiple conductive terminals are installed inside the base. The conductive terminals have terminal leads extending from the bottom of the base. The terminal leads extend backward and bend at 90 degrees. The terminal leads are made of brass and their surfaces are covered with a gold plating layer by electroplating.

[0006] In some embodiments, the bracket includes an integrally formed front end plate, a left side plate, and a right side plate. The first support leg extends outward from the bottom of the left side plate and is bent at a 90-degree angle, and the second support leg extends outward from the bottom of the right side plate and is bent at a 90-degree angle, thereby reducing the processing difficulty of the first and second support legs.

[0007] In at least one embodiment, the limiting baffle includes at least two first baffles and at least two second baffles. The two first baffles are spaced apart at the rear end of the left side plate, and the first baffles extend inward from the rear end of the left side plate and are bent at a 90-degree angle. The two second baffles are spaced apart at the rear end of the right side plate, and the second baffles extend inward from the rear end of the right side plate and are bent at a 90-degree angle, which reduces the processing difficulty of the first baffles and the second baffles. The rear end of the base is provided with a positioning groove that matches the first baffles and the second baffles. The first baffles and the second baffles abut against the positioning groove. The first baffles and the second baffles can limit the base and improve the overall reliability of the tactile switch.

[0008] In at least one embodiment, the front end plate is provided with a plurality of connection holes that match the fixing posts. The fixing posts pass through the connection holes, and the protruding ends of the fixing posts are formed with rivet heads by a hot riveting process. The rivet heads can limit the fixing posts, thereby achieving a fixed connection between the base and the front end plate.

[0009] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0010] The push handle of this tactile switch is made of silicone. In the event of a drop or other accident, the elasticity of the silicone handle acts as a buffer, reducing the impact on the internal structure of the tactile switch. Furthermore, silicone is not easily broken. The first and second support legs are bent at 90 degrees, as are the terminal leads. These bends provide cushioning during a drop, absorbing some of the impact force. Because the direction of the force changes, the direct impact on the first and second support legs and the terminal leads is relatively small, making them less prone to deformation and better maintaining their shape and structural integrity. This significantly reduces the probability of malfunction or damage to the tactile switch due to drops. The tactile switch can pass a 1-meter free-fall drop test, ensuring it continues to function normally after a fall. The surface of the terminal leads is coated with a gold plating layer through an electroplating process. The gold plating layer has extremely strong chemical inertness, and in harsh environments such as high temperature and high humidity, the risk of failure of the gold plating layer is significantly lower than that of other plating layers such as silver plating, avoiding short circuits caused by silver whisker growth. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0012] Figure 2 This is an exploded view of an embodiment of this application;

[0013] Figure 3 This is an exploded structural diagram from another perspective of an embodiment of this application.

[0014] The following are the labels in the diagram: 1. Bracket; 11. Front panel; 12. Left side panel; 13. Right side panel; 2. Base; 3. Positioning hole; 4. First support foot; 5. Second support foot; 6. Limiting baffle; 61. First baffle; 62. Second baffle; 7. Press handle; 8. Fixing post; 81. Rivet head; 9. Terminal pin; 10. Positioning groove; 20. Connecting hole. Detailed Implementation

[0015] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0016] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0017] like Figures 1-3As shown, the drop-proof tactile switch provided in this application embodiment includes a bracket 1 and a base 2. The bracket 1 is a rectangular groove with a positioning hole 3 at the front end. Two first support feet 4 are spaced apart on the bottom left side of the bracket 1, and two second support feet 5 are spaced apart on the bottom right side of the bracket 1. The first and second support feet 4 and 5 extend outward and bend at 90 degrees, respectively. The first and second support feet 4 and 5 are used as grounding pins soldered onto the circuit board to achieve electrostatic discharge or grounding of the bracket 1. A limiting baffle 6 is provided at the rear end of the bracket 1. The base 2 is located inside the bracket 1, and a silicone push handle 7 is movably connected to the front end of the base 2. The base 2 contains springs, contacts, and other components. The push handle 7 flattens the springs, causing the movable contacts inside the base 2 to contact the fixed contacts, thereby forming a conductive path. The specific connection structure between the push handle 7 and the base 2 is prior art. Without going into too much detail; the handle 7 is pressed through the positioning hole 3, and the front end of the base 2 is also provided with multiple fixing posts 8. The multiple fixing posts 8 are fixedly connected to the bracket 1. Through the fixed connection between the fixing posts 8 and the bracket 1, and the limiting baffle 6 limiting the base 2, the sturdiness of the assembly of the bracket 1 and the base 2 can be guaranteed. The base 2 is equipped with multiple conductive terminals, and the conductive terminals have terminal pins 9 extending from the bottom of the base 2. The terminal pins 9 are used to solder to the corresponding circuit board, thereby connecting the tactile switch to the circuit. The terminal pins 9 extend backward and bend at 90 degrees. The terminal pins 9 are made of brass, and their surface is covered with a gold plating layer through an electroplating process. The minimum thickness of the gold plating layer is 0.025μm. The gold plating layer has extremely strong chemical inertness. In harsh environments such as high temperature and high humidity, the failure risk of the terminal pins 9 with the gold plating layer is significantly lower than that of other plating layers such as silver plating, avoiding short circuits caused by silver whisker growth.

[0018] Because the push handle 7 of this tactile switch is made of silicone, its elasticity provides cushioning in the event of a drop or other accidental impact, reducing the impact on the internal structure of the tactile switch. Furthermore, silicone is not easily broken. Additionally, the first support leg 4 and the second support leg 5 are bent at 90 degrees, and the terminal pin 9 is also bent at 90 degrees. Compared to some tactile switches on the market that use vertically downward-facing support legs and terminal pins 9, the 90-degree bending of the first support leg 4, the second support leg 5, and the terminal pin 9 provides better protection against drops. Upon impact, the bent portion acts as a buffer, absorbing some of the impact force. Furthermore, due to the change in the direction of the force, the direct impact force on the first support foot 4, the second support foot 5, and the terminal pin 9 is relatively small, making them less prone to deformation and better maintaining their shape and structural integrity. This significantly reduces the probability of the tactile switch malfunctioning or being damaged due to drops. The tactile switch can withstand a 1-meter free-fall drop test, ensuring it continues to function normally after the drop. The tactile switch can be surface-mounted using automated SMT equipment, replacing manual labor and improving production efficiency.

[0019] refer to Figure 2 The bracket 1 includes an integrally formed front end plate 11, a left side plate 12 and a right side plate 13. The first support leg 4 extends outward from the bottom of the left side plate 12 and is bent at a 90-degree angle. The second support leg 5 extends outward from the bottom of the right side plate 13 and is bent at a 90-degree angle. The integral forming and bending process reduces the processing difficulty of the first support leg 4 and the second support leg 5.

[0020] refer to Figure 3 The limiting baffle 6 includes at least two first baffles 61 and at least two second baffles 62. The two first baffles 61 are spaced apart at the rear end of the left side plate 12, and the first baffles 61 extend inward from the rear end of the left side plate 12 and are bent at a 90-degree angle. The two second baffles 62 are spaced apart at the rear end of the right side plate 13, and the second baffles 62 extend inward from the rear end of the right side plate 13 and are bent at a 90-degree angle, which reduces the processing difficulty of the first baffles 61 and the second baffles 62. The rear end of the base 2 is provided with a positioning groove 10 that matches the first baffles 61 and the second baffles 62. The first baffles 61 and the second baffles 62 abut against the positioning groove 10. The first baffles 61 and the second baffles 62 can limit the rear of the base 2, ensuring the reliability of the assembly of the bracket 1 and the base 2.

[0021] Furthermore, the front end plate 11 is provided with a plurality of connection holes 20 that match the fixing post 8. The fixing post 8 passes through the connection holes 20, and the protruding end of the fixing post 8 is formed with a rivet head 81 by a hot riveting process. The diameter of the rivet head 81 is larger than the diameter of the connection hole 20. The rivet head 81 is used to limit the fixing post 8 at the rear, so as to realize the fixed connection between the fixing post 8 and the bracket 1 and ensure the reliability of the assembly of the bracket 1 and the base 2.

[0022] Optionally, bracket 1 is made of brass, and its surface is covered with a copper-tin alloy plating layer by electroplating. The minimum thickness of the copper-tin alloy plating layer is 0.3μm. The copper-tin alloy plating layer gives bracket 1 good corrosion resistance and suitable hardness. Base 2 is made of PA9T nylon plastic, which has good high temperature resistance and mechanical strength.

[0023] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A drop-resistant tactile switch, comprising a bracket and a base, characterized in that: The bracket is a rectangular groove with a positioning hole at the front end. Two first support legs are spaced apart on the bottom left side of the bracket, and two second support legs are spaced apart on the bottom right side of the bracket. The first and second support legs extend outward and bend at 90 degrees. A limiting baffle is provided at the rear end of the bracket. The base is located inside the bracket, and a silicone pressing handle is movably connected to the front end of the base. The pressing handle passes through the positioning hole. The front end of the base is also provided with multiple fixing posts, which are fixedly connected to the bracket. Multiple conductive terminals are installed inside the base. The conductive terminals are provided with terminal pins that extend from the bottom of the base. The terminal pins extend backward and are bent at a 90-degree angle. The terminal pins are made of brass and their surfaces are covered with a gold plating layer through an electroplating process.

2. The drop-resistant tactile switch according to claim 1, characterized in that: The bracket includes an integrally formed front panel, a left side panel, and a right side panel. The first support leg extends outward from the bottom of the left side panel and is bent at a 90-degree angle. The second support leg extends outward from the bottom of the right side panel and is bent at a 90-degree angle.

3. The drop-resistant tactile switch according to claim 2, characterized in that: The limiting baffle includes at least two first baffles and at least two second baffles. The two first baffles are spaced apart at the rear end of the left side plate, and the first baffles extend inward from the rear end of the left side plate and are bent at a 90-degree angle. The two second baffles are spaced apart at the rear end of the right side plate, and the second baffles extend inward from the rear end of the right side plate and are bent at a 90-degree angle. The rear end of the base is provided with a positioning groove that matches the first baffles and the second baffles, and the first baffles and the second baffles abut against the positioning groove.

4. The drop-resistant tactile switch according to claim 2, characterized in that: The front end plate is provided with a plurality of connection holes that match the fixing post. The fixing post passes through the connection holes, and the protruding end of the fixing post is formed with a rivet head by a hot riveting process.

5. The drop-resistant tactile switch according to claim 1 or 2, characterized in that: The bracket is made of brass, and its surface is covered with a copper-tin alloy plating layer through an electroplating process.

6. The drop-resistant tactile switch according to claim 1, characterized in that: The base is made of PA9T nylon plastic.

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