CN216597353U

CN216597353U - Push-button switch

Info

Publication number: CN216597353U
Application number: CN202122740686.6U
Authority: CN
Inventors: 赵俊
Original assignee: Fuyu Electronic Technology Huaian Co Ltd; Foxconn Interconnect Technology Ltd
Current assignee: Fuyu Electronic Technology Huaian Co Ltd; Foxconn Interconnect Technology Ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-05-24
Anticipated expiration: 2031-11-10

Abstract

The utility model provides a push-button switch, comprising an insulating body, a first fixed terminal, a second fixed terminal and a dome-shaped metal sheet, the insulating body is provided with a bottom wall and a ring wall which is formed by upwards protruding from the periphery of the bottom wall, the bottom wall and the ring wall form an accommodating cavity, the first fixed terminal is provided with a first contact part exposed in the containing cavity, the second fixed terminal is provided with a second contact part which is positioned beside the first contact part and exposed in the containing cavity, the metal sheet is normally in contact with the second contact portion and not in contact with the first contact portion, when the metal sheet is pressed downwards and reversed, the metal sheet is further contacted with the first contact part, the surface of the first contact part is downwards concave to form a concave part, when the metal sheet is pressed down and reversed, the metal sheet is in contact with the upper peripheral edge of the concave part. By the arrangement of the concave part, the contact between the metal sheet and the first fixed terminal can be more reliable.

Description

Push-button switch

[ technical field ] A

The present invention relates to a push button switch, and more particularly, to a push button switch that is capable of contacting and separating with and from a fixed terminal by pressing a metal plate.

[ background ] A method for producing a semiconductor device

Chinese utility model patent No. CN208706494U discloses a button switch, including having the insulator of acceping the chamber, being fixed in first fixed terminal, second fixed terminal, sheetmetal and sealing the dustproof sheet of acceping the chamber in the insulator. The first fixed terminal has a first contact portion exposed to the center of the bottom wall of the insulating body, the second fixed terminal has a second contact portion exposed to the bottom wall of the insulating body, the second contact portion is disposed beside the first contact portion, the metal sheet is normally in contact with the second contact portion of the second fixed terminal and separated from the first contact portion of the first fixed terminal, and when the metal sheet is pressed, the metal sheet is inverted and further in contact with the first contact portion. However, when the surface of the first contact portion is contaminated, the metal sheet cannot be normally electrically connected to the first contact portion.

Accordingly, there is a need for an improved push button switch that overcomes the above-mentioned deficiencies.

[ Utility model ] content

The utility model aims to provide a button switch with reliable electrical performance.

The purpose of the utility model is realized by the following technical scheme: a push-button switch comprises an insulating body, a first fixed terminal, a second fixed terminal and a dome-shaped metal sheet, the insulating body is provided with a bottom wall and a ring wall which is formed by upwards protruding from the periphery of the bottom wall, the bottom wall and the ring wall form an accommodating cavity, the first fixed terminal is provided with a first contact part exposed in the containing cavity, the second fixed terminal is provided with a second contact part which is positioned beside the first contact part and exposed in the containing cavity, the metal sheet is normally in contact with the second contact portion and not in contact with the first contact portion, when the metal sheet is pressed downwards and reversed, the metal sheet is further contacted with the first contact part, the surface of the first contact part is downwards concave to form a concave part, when the metal sheet is pressed down and reversed, the metal sheet is in contact with the upper peripheral edge of the concave part.

Further, the recessed portion is circular, and the upper peripheral edge of the recessed portion is an arc surface portion connecting the side portion of the recessed portion and the surface of the first contact portion.

Further, the surface of the first contact portion is not higher than the top surface of the bottom wall, and the surface of the first contact portion is a smooth surface except the recessed portion.

Further, the first fixed terminal has a plate portion embedded in the bottom wall, an upper surface of the plate portion is exposed out of a center of the bottom wall to form a surface of the first contact portion, an upper surface of the plate portion is stamped downward to form a protruding portion protruding out of a lower surface of the plate portion to be further embedded in the bottom wall, and an upper side of the protruding portion close to the accommodating cavity forms the recessed portion.

Further, a lower side of the protruding portion with respect to the upper side is exposed to a bottom surface of the bottom wall.

Further, the push button switch is soldered to a circuit board, the first fixing terminal has a first soldering portion soldered to the circuit board, the second fixing terminal has a second soldering portion soldered to the circuit board, and a lower side of the protruding portion abuts against the circuit board.

Furthermore, the first fixed terminal is provided with a pair of the first welding parts, the second fixed terminal is provided with a pair of the second welding parts, and the pair of the first welding parts and the pair of the second welding parts are respectively arranged at four corners of the insulating body.

Further, the second fixed terminal is provided with a pair of the second contact portions, the pair of the second contact portions are disposed on opposite sides of the first contact portion, and a surface of the second contact portion is higher than a top surface of the bottom wall.

Further, the metal sheet includes a dome-shaped central portion and a ring portion located on a peripheral edge of the central portion, the ring portion is in normal contact with the second contact portion of the second fixed terminal, and the central portion is pressed downward and then contacts with an upper peripheral edge of the recessed portion.

Further, the button switch further comprises a dustproof sheet covering the upper end of the insulating body to seal the accommodating cavity, and a bulge portion protruding upwards and used for the central portion to abut against is arranged at the position, corresponding to the central portion, of the dustproof sheet.

Compared with the prior art, the utility model has the following beneficial effects: the surface of the first contact part is concavely provided with a concave part which can accommodate dirt, and when the metal sheet is reversed, the metal sheet is contacted with the upper periphery of the concave part, so that the contact between the metal sheet and the concave part is reliable.

[ description of the drawings ]

Fig. 1 is a perspective view of the push switch of the present invention.

Fig. 2 is a perspective view of fig. 1 from another perspective.

Fig. 3 is an exploded perspective view of the push button switch of the present invention.

Fig. 4 is an exploded perspective view of fig. 3 from another perspective.

Fig. 5 is a perspective view of the dust-proof sheet and the metal sheet of the push switch of the present invention separated from the insulating body.

Fig. 6 is a cross-sectional view taken along line a-a of fig. 1.

Fig. 7 is a schematic view showing the dust-proof sheet and the metal sheet of fig. 6 pressed down.

The following detailed description will further illustrate the utility model in conjunction with the above-described figures.

[ detailed description ] embodiments

Referring to fig. 1 to 5, a push button switch 100 of the present invention includes an insulating body 1, a first fixed terminal 21 fixed to the insulating body 1, a second fixed terminal 22 fixed to the insulating body 1, a dome-shaped metal sheet 3 assembled to the insulating body 1, and a dust-proof sheet 4 covering the insulating body 1.

The insulating body 1 has a bottom wall 11 and a ring wall 12 formed by protruding upward from the periphery of the bottom wall 11, and the bottom wall 11 and the ring wall 12 form an accommodating cavity 10. The first fixed terminal 21 and the second fixed terminal 22 are made of metal plates, and the first fixed terminal 21 and the second fixed terminal 22 are injection molded on the insulating body 1. The first fixed terminal 21 has a first contact portion 211 exposed in the accommodating cavity 10 and a first soldering portion 212 extending out of the insulating body 1 and soldered to a circuit board (not shown), the second fixed terminal 22 has a second contact portion 221 exposed in the accommodating cavity 10 and a second soldering portion 222 extending out of the insulating body 1 and soldered to the circuit board (not shown), the second contact portion 221 is disposed beside the first contact portion 211, the metal sheet 3 is loaded into the accommodating cavity 10 from top to bottom, and the dust-proof sheet 4 covers the upper end of the insulating body 1 to close the accommodating cavity 10. As shown in fig. 6 and 7, the metal sheet 3 is normally in contact with the second contact portion 221 but not in contact with the first contact portion 211, the normal state refers to a state where the metal sheet 3 is not pressed, and when the metal sheet 3 is pressed reversely, the metal sheet 3 is further in contact with the first contact portion 211, so that the first contact portion 211 and the second contact portion 221 are electrically conducted.

In order to prevent the surface 2110 of the first contact portion 211 from affecting the electrical connection between the first contact portion 211 and the metal sheet 3 due to dirt (e.g., dust), the surface 2110 of the first contact portion 211 is recessed downward to form a recess 213, and the recess 213 can provide a dirty accommodating space for dust, etc., so that when the metal sheet 3 is pressed down and reversed, the metal sheet 3 contacts the upper peripheral edge of the recess 213, thereby ensuring a reliable connection between the metal sheet 3 and the first fixing terminal 21.

In the present invention, the first fixed terminal 21 is provided with a pair of the first soldering portions 212, the second fixed terminal 22 is provided with a pair of the second soldering portions 222, and the pair of the first soldering portions 212 and the pair of the second soldering portions 222 are respectively disposed at four corners of the insulating main body 1. The second contact portions 221 of the second fixed terminal 22 are provided in a pair and located on opposite sides of the first contact portion 211, respectively, the metal sheet 3 includes a dome-shaped central portion 31 and a ring portion 32 located on a peripheral edge of the central portion 31, the ring portion 32 is in normal contact with the pair of second contact portions 221, and when the central portion 31 is pressed downward, the central portion 31 is inverted with respect to the ring portion 32 and contacts an upper peripheral edge of the recessed portion 213 of the first contact portion 211. The dust-proof sheet 4 is provided with a bulge portion 41 which is formed by projecting upwards and is used for abutting against the central portion 31, corresponding to the position of the central portion 31, and the bulge portion 41 of the dust-proof sheet 4 is higher than the area except the periphery of the bulge portion 41, so that the good pressing hand feeling of the button switch 100 can be provided.

In the present invention, the recess 213 is formed in a circular shape, so that the central portion 31 can be continuously contacted with the upper peripheral edge of the recess 213 when the central portion 31 is inverted. The upper peripheral edge of the recessed portion 213 is an arc portion 2132 connecting the side portion 2131 of the recessed portion 213 and the surface 2110 of the first contact portion 211, and the upper peripheral edge is provided with the arc portion 2132 so that the central portion 31 can smoothly contact therewith. The surface 2110 of the first contact portion 211 is a smooth surface except the recess 213.

In view of the miniaturization and lightness of the push button switch 100, the surfaces 2210 of the pair of second contact portions 221 are higher than the top surface 110 of the bottom wall 11, and the surfaces 2110 of the first contact portions 211 are not higher than the top surface 110 of the bottom wall 11, so that the movement stroke of the metal sheet 3 after being pressed can be ensured, and the pressing feeling can be ensured. Preferably, the surface 2110 of the first contact portion 211 is flush with the top surface 110 of the bottom wall 11.

In the present invention, the first fixed terminal 21 has a plate portion 210 embedded in the bottom wall 11, the upper surface of the plate portion 210 is exposed from the center of the bottom wall 11 to form a surface 2110 of the first contact portion 211, a protruding portion 2102 protruding out of the lower surface 2101 of the plate portion is formed by pressing down the upper surface of the plate portion 210, and the upper side of the protruding portion 2102 near the receiving cavity 10 forms the recessed portion 213. The protruding portion 2102 allows the plate portion 210 to be buried further downward in the bottom wall 11, and thus, the holding force between the first fixing terminal 21 and the bottom wall 11 can be improved. In addition, the lower side 21021 of the protruding portion 2102 opposite to the upper side is exposed to the bottom surface 111 of the bottom wall 11, and the lower side 21021 of the protruding portion 2102 abuts against the circuit board (not shown), when the push button switch 100 is heated, the lower side 21021 of the protruding portion 2102 located at the center of the bottom wall 11 abuts against the circuit board via the first and second soldering

portions

212, 222, so that the insulating body 1 can be prevented from being warped and deformed by heat.

The above description is only a part of the embodiments of the present invention, and not all embodiments, and any equivalent variations of the technical solutions of the present invention, which are made by those skilled in the art through reading the present specification, are covered by the claims of the present invention.

Claims

1. A push button switch comprising an insulating body, a first fixed terminal, a second fixed terminal and a dome-shaped metal sheet, wherein the insulating body has a bottom wall and a circumferential wall protruding upward from the circumference of the bottom wall, the bottom wall and the circumferential wall form a receiving cavity, the first fixed terminal has a first contact portion exposed in the receiving cavity, the second fixed terminal has a second contact portion located beside the first contact portion and exposed in the receiving cavity, the metal sheet normally contacts with the second contact portion but does not contact with the first contact portion, and when the metal sheet is pressed down and reversed, the metal sheet further contacts with the first contact portion, the push button switch is characterized in that: the surface of the first contact part is downwards concave to form a concave part, and when the metal sheet is pressed downwards and reversed, the metal sheet is contacted with the upper periphery of the concave part.

2. The push button switch of claim 1, wherein: the depressed part is circular, and the upper edge of depressed part is for connecting the lateral part of depressed part with the cambered surface portion on the surface of first contact site.

3. The push button switch of claim 1, wherein: the surface of the first contact part is not higher than the top surface of the bottom wall, and the surface of the first contact part is a smooth surface except the concave part.

4. The push button switch of claim 1, wherein: the first fixed terminal has a plate portion buried in the bottom wall, an upper surface of the plate portion is exposed out of a center of the bottom wall to form a surface of the first contact portion, an upper surface of the plate portion is stamped downward to form a protruding portion protruding out of a lower surface of the plate portion to be further buried in the bottom wall, and an upper side of the protruding portion, which is close to the accommodating cavity, forms the recessed portion.

5. The push button switch of claim 4, wherein: the lower side of the protruding portion with respect to the upper side is exposed to the bottom surface of the bottom wall.

6. The push button switch of claim 5, wherein: the button switch is welded on a circuit board, the first fixed terminal is provided with a first welding part welded on the circuit board, the second fixed terminal is provided with a second welding part welded on the circuit board, and the lower side of the protruding part abuts against the circuit board.

7. The push button switch of claim 6, wherein: the first fixed terminal is provided with a pair of first welding parts, the second fixed terminal is provided with a pair of second welding parts, and the pair of first welding parts and the pair of second welding parts are respectively arranged at four corners of the insulating body.

8. The push button switch of claim 1, wherein: the second fixed terminal is provided with a pair of second contact portions, the pair of second contact portions are arranged on two opposite sides of the first contact portion, and the surface of each second contact portion is higher than the top surface of the bottom wall.

9. The push button switch of claim 1, wherein: the metal sheet comprises a dome-shaped central part and a ring part positioned on the periphery of the central part, the ring part is in normal contact with the second contact part of the second fixed terminal, and the central part is pressed downwards and then is in contact with the upper periphery of the sunken part.

10. The push button switch of claim 9, wherein: the button switch further comprises a dustproof sheet covering the upper end of the insulating body to seal the accommodating cavity, and a bulge portion protruding upwards is arranged at the position, corresponding to the central portion, of the dustproof sheet and used for the central portion to abut against.