Tact switch with position avoiding structure

Abstract

The utility model relates to a kind of switch devices, in particular to a kind of light touch switch with avoid structure. The light touch switch includes support and base mounted on support, several conductive terminals are installed in base, and terminal pin extending out of base vertically downwards is equipped on conductive terminal;Support bottom is equipped with the support leg of thin sheet shape extending vertically downwards, and the area of support bottom close to terminal pin is equipped with avoid structure. When the tin paste around the round hole straight insertion pad of terminal pin of the light touch switch is too much overflow, tin paste is avoided with support contact.

Description

Technical Field

[0001] This utility model relates to a switching device, and more particularly to a tactile switch with a avoidance structure. Background Technology

[0002] A tactile switch is a type of push-button switch. When in use, pressure is applied in the direction of operation to close the switch and turn it on. When the pressure is released, the switch turns off. Tactile switches are usually soldered onto a printed circuit board.

[0003] Existing tactile switches typically include a bracket and a base mounted on the bracket. The bracket usually has support feet, which, when used as grounding pins, need to be soldered to corresponding through-hole pads on the circuit board. The base usually has conductive terminals, and to achieve electrical connection between the tactile switch and the circuit, these terminal pins also need to be soldered to corresponding through-hole pads on the circuit board. However, as... Figures 1-2 As shown, in some existing tactile switches, due to spatial structure design issues, the distance between the terminal pins and the bracket is too close. This causes the round hole through-hole pads of the terminal pins to be too close to the bottom of the bracket. During the soldering stage, because the solder paste is fluid and melts at high temperatures, if there is too much solder paste around the round hole through-hole pads of the terminal pins, the molten solder paste may overflow and cause the solder paste of the terminal pins to come into contact with the bracket, thus forming a conductive bridge. This causes the terminal pins to conduct with the bracket and support feet, affecting the circuit of both and causing problems such as circuit failure, thus affecting the reliability of the tactile switch product. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a tactile switch with a avoidance structure, which prevents the solder paste from contacting the bracket when too much solder paste overflows around the circular hole of the terminal pin directly inserted into the solder pad.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A tactile switch with a clearance structure includes a bracket and a base mounted on the bracket. A plurality of conductive terminals are installed in the base, and terminal pins extending vertically downward from the base are provided on the conductive terminals. The bottom of the bracket is provided with a thin, vertically downward extending support foot, and the area of ​​the bottom of the bracket near the terminal pins is provided with a clearance structure.

[0007] Furthermore, the bracket includes a front end plate and side plates integrally disposed on the left and right sides of the front end plate. The side plates bend backward from the left and right sides of the front end plate, and a receiving groove for mounting the base is formed between the side plates and the front end plate; the support feet are disposed at the bottom of the side plates.

[0008] Furthermore, the clearance structure is a concave arc notch, which is located at the bottom of the side plate.

[0009] Furthermore, the clearance structure is an arc plate, which is integrally connected to the bottom of the side plate, and the center of the arc plate is located on the side close to the terminal pin.

[0010] Furthermore, the base is provided with several positioning posts, which pass through the front end plate and are detachably and fixedly connected to the base. The positioning posts are provided with limiting end plates on the outside of the front end plate.

[0011] Furthermore, the base is equipped with a spring and conductive sheet assembly, and the front end of the base is connected to a pressing handle that can move back and forth. One end of the pressing handle contacts the spring, and the other end protrudes from the front end plate.

[0012] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0013] This invention features a clearance structure at the bottom of the bracket near the terminal pins. This clearance structure prevents excessive solder paste from overflowing around the circular hole pads of the terminal pins, thus avoiding contact between the solder paste and the bracket to form a conductive bridge. This prevents the terminal pins from conducting with the bracket and support feet, and avoids affecting the circuit. Attached Figure Description

[0014] Several embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0015] Figure 1 Left view of an existing tactile switch;

[0016] Figure 2 A bottom view of an existing tactile switch connected to a round through-hole pad;

[0017] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0018] Figure 4 This is a left view of Embodiment 1 of this application when connected to a circuit board;

[0019] Figure 5 This is a bottom view of Embodiment 1 of this application when connected to a through-hole pad;

[0020] Figure 6 This is a schematic diagram of the internal structure of the base in Embodiment 1 of this application;

[0021] Figure 7 This is a bottom view of Embodiment 2 of this application when connected to a through-hole pad.

[0022] The following are the labels in the diagram: 1. Bracket; 11. Front panel; 12. Side panel; 2. Base; 21. Limiting end plate; 3. Terminal pin; 4. Support foot; 5. Alternating structure; 51. Concave arc notch; 52. Arc plate; 6. Receiving groove; 7. Spring; 8. Conductive sheet assembly; 9. Press handle. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] Example 1

[0026] like Figures 3-6As shown, a tactile switch with a clearance structure includes a bracket 1 and a base 2 mounted on the bracket 1. Several conductive terminals are installed in the base 2, and terminal pins 3 extend vertically downwards from the base 2 on the conductive terminals. The terminal pins 3 are used to solder onto corresponding through-hole pads on a circuit board, thereby achieving electrical connection between the tactile switch and the circuit. The bottom of the bracket 1 has a vertically extending, thin-plate-shaped support foot 4, which can be soldered onto the corresponding through-hole pads on the circuit board as grounding pins to achieve electrostatic discharge or grounding of the bracket 1. Furthermore, a clearance structure 5 is provided at the bottom of the bracket 1 near the terminal pins 3. This clearance structure 5 prevents solder paste from contacting the bracket 1 when excessive solder paste overflows around the through-hole pads of the terminal pins 3, thus preventing the terminal pins 3 from conducting with the bracket 1 and the support foot 4.

[0027] The bracket 1 includes a front panel 11 and side panels 12 integrally disposed on the left and right sides of the front panel 11. The side panels 12 bend backward from the left and right sides of the front panel 11, forming a receiving groove 6 between the side panels 12 and the front panel 11 for mounting the base 2. The support feet 4 are disposed at the bottom of the side panels 12. The clearance structure 5 is a concave arc notch 51, which is disposed at the bottom of the side panel 12 and close to the terminal pin 3 area. By setting the concave arc notch 51, a height difference can be formed between this area of ​​the side panel 12 and the pad of the terminal pin 3. When solder paste overflows, it can prevent the solder paste from contacting the bottom of the side panel 12, prevent the formation of a conductive bridge, and prevent the circuit from being affected.

[0028] In addition, the base 2 is provided with several positioning posts, which pass through the front end plate 11 and are detachably and fixedly connected to the base 2. A limiting end plate 21 is provided on the outer side of the front end plate 11 on each positioning post, thus achieving a stable connection between the base 2 and the front end plate 11. A spring 7 and a conductive sheet assembly 8 are installed inside the base 2. A movable pressing handle 9 is connected to the front end of the base 2. One end of the pressing handle 9 contacts the spring 7, and the other end protrudes from the front end plate 11. The spring 7 is a dome switch. When the pressing handle 9 is not pressed, the spring 7 is in a raised state, the conductive sheet assemblies 8 are disconnected, and the circuit is open. When the pressing handle 9 is pressed, it presses down on the spring 7. When the spring 7 deforms to a critical point, it suddenly collapses and is flattened. The center of the spring 7 contacts the conductive sheet assembly 8 in the middle area, and the conductive sheet assemblies 8 are connected, and connected to the circuit board through the terminal pin 3 of the conductive terminal.

[0029] Example 2

[0030] like Figure 7As shown, the difference between this embodiment and Embodiment 1 is that the clearance structure 5 is an arc plate 52, which is integrally connected to the bottom of the side plate 12, and the center of the arc plate 52 is located on the side close to the terminal pin 3. By setting the arc plate 52, a horizontal clearance space can be formed between this area of ​​the side plate 12 and the pad of the terminal pin 3. When solder paste overflows, it can prevent the solder paste from contacting the bottom of the side plate 12, prevent the formation of a conductive bridge, and prevent the circuit from being affected.

[0031] 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 tactile switch with a clearance structure, comprising a bracket and a base mounted on the bracket, characterized in that: The base is equipped with a number of conductive terminals, and the conductive terminals are provided with terminal pins that extend vertically downward from the base; the bottom of the bracket is provided with a thin support foot that extends vertically downward, and the area of ​​the bottom of the bracket near the terminal pins is provided with a clearance structure.

2. The tactile switch with a clearance structure according to claim 1, characterized in that: The bracket includes a front end plate and side plates integrally disposed on the left and right sides of the front end plate. The side plates bend backward from the left and right sides of the front end plate, and a receiving groove for mounting the base is formed between the side plates and the front end plate. The support feet are disposed at the bottom of the side plates.

3. The tactile switch with a clearance structure according to claim 2, characterized in that: The clearance structure is a concave arc notch, which is located at the bottom of the side plate.

4. The tactile switch with a clearance structure according to claim 2, characterized in that: The clearance structure is an arc plate, which is integrally connected to the bottom of the side plate, and the center of the arc plate is located on the side close to the terminal pin.

5. The tactile switch with a clearance structure according to claim 2, characterized in that: The base is provided with a number of positioning posts, which pass through the front end plate and are detachably and fixedly connected to the base. The positioning posts are provided with limiting end plates on the outside of the front end plate.

6. The tactile switch with a clearance structure according to claim 2, characterized in that: The base is equipped with a spring and a conductive sheet assembly. A press handle that can move back and forth is connected to the front end of the base. One end of the press handle contacts the spring, and the other end protrudes from the front end plate.

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