CN211529839U

CN211529839U - Push-button switch

Info

Publication number: CN211529839U
Application number: CN202020138980.2U
Authority: CN
Inventors: 苏杰; 赵俊
Original assignee: Fuyu Electronic Technology Huaian Co Ltd; Hongteng Precision Technology Co Ltd
Current assignee: Fuyu Electronic Technology Huaian Co Ltd; Hongteng Precision Technology Co Ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-09-18
Anticipated expiration: 2030-01-20

Abstract

A button switch comprises an insulating body with a containing cavity, a terminal component and a dustproof sheet for covering the insulating body, the terminal assembly comprises a fixed terminal fixed on the insulating body and a metal piece covering the accommodating cavity and having the same inner diameter size as the accommodating cavity, the fixed terminal includes a first fixed terminal and a second fixed terminal provided separately from each other, the first fixed terminal includes a first contact portion, the second fixed terminal comprises a second contact part, the metal piece comprises a dome-shaped central part which is positioned above the second contact part and is not in contact with the second contact part normally in the vertical direction, and a ring part which is positioned at the periphery of the central part and is in contact with the first contact part normally, the second contact part comprises a base plate part and at least one convex hull which is integrally and upwards protruded from the base plate part and does not contact with the central part under normal state. Because the convex hull is arranged on the second contact part of the second fixed terminal, the convex hull is small, dust is difficult to stay on the convex hull, and the convex hull of the second contact part is in point contact with the metal piece to realize good conduction.

Description

Push-button switch

[ technical field ] A method for producing a semiconductor device

The present invention relates to a push button switch, and more particularly to a push button switch which can reduce the influence of foreign matters on the switch by providing a convex hull on a second contact portion to form a point contact with a metal member.

[ background of the invention ]

Taiwan patent No. TWM573068 discloses a push-button switch, wherein a second contact portion of a second conductive terminal is provided with two grooves, the second contact portion is four parts, and the grooves are used for accommodating foreign matters such as dust, so that the second contact portion is in contact with a metal piece, but the second contact portion is still in a plane arrangement, so that dust is easily accumulated, and the conduction is still influenced.

Accordingly, there is a need for an improved push button switch that overcomes this drawback.

[ Utility model ] content

An object of the utility model is to provide a thereby reduce the button switch of foreign matter to switching on the influence through set up the point contact that the convex closure formed with the metalwork on the second contact site.

The purpose of the utility model is realized through the following technical scheme: a button switch comprises an insulating body with a containing cavity, a terminal component and a dustproof sheet for covering the insulating body, the terminal assembly comprises a fixed terminal fixed on the insulating body and a metal piece covering the accommodating cavity and having the same inner diameter size as the accommodating cavity, the fixed terminal includes a first fixed terminal and a second fixed terminal provided separately from each other, the first fixed terminal includes a first contact portion, the second fixed terminal comprises a second contact part, the metal piece comprises a dome-shaped central part which is positioned above the second contact part and is not in contact with the second contact part normally in the vertical direction, and a ring part which is positioned at the periphery of the central part and is in contact with the first contact part normally, the second contact part comprises a base plate part and at least one convex hull which is integrally and upwards protruded from the base plate part and does not contact with the central part under normal state.

Further, the first fixed terminal includes a pair of the first contact portions, and the second fixed terminal includes one of the second contact portions, the second contact portion being located between the pair of the first contact portions.

Furthermore, the second contact part is provided with three convex hulls.

Furthermore, the three convex hulls are arranged in a triangle.

Furthermore, the top surface of the convex hull is smoothly arranged.

Furthermore, the insulating body is provided with a bottom wall and a peripheral wall which protrudes out of the peripheral side of the bottom wall and forms an accommodating cavity with the bottom wall, the dustproof sheet is fixedly arranged on the upper end surface of the peripheral wall to cover the accommodating cavity, the metal piece is arranged in the accommodating cavity from top to bottom and is positioned above the fixed terminal and below the dustproof sheet, and the metal piece is pressed downwards to be contacted with the second contact part.

Furthermore, the terminal assembly is fixed on the insulating body and has a contact portion exposed in the accommodating cavity and a welding portion extending out of the bottom wall, the contact portion includes the first contact portion and the second contact portion, and the welding portion includes a first welding portion arranged on the first fixed terminal and opposite to the first contact portion and a second welding portion arranged on the second fixed terminal and located on two sides of the second contact portion.

Further, the peripheral wall is provided with an inner wall positioned in the containing cavity and an outer wall opposite to the inner wall, and the peripheral wall penetrates through the inner wall and the outer wall to form a groove for communicating the containing cavity with the outside.

Further, the slot is formed by downwards sinking from the upper end surface of the peripheral wall, and the slot is approximately in a V-shaped structure.

Further, the metal piece is a sheet structure made of stainless steel.

Compared with the prior art, the utility model discloses following beneficial effect has: because the convex hull is arranged on the second contact part of the second fixed terminal, the convex hull is small, dust is difficult to stay on the convex hull, and the convex hull of the second contact part is in point contact with the metal piece to realize good conduction.

[ description of the drawings ]

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

Fig. 2 is an exploded perspective view of the push switch of the present invention.

Fig. 3 is an exploded perspective view in the other direction of fig. 2.

Fig. 4 is a further exploded perspective view of the push button switch of fig. 3.

Fig. 5 is an exploded perspective view in another direction of fig. 4.

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

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

[ description of main reference symbols ]

Push-button switch 100 insulation body 1

Bottom wall 11 groove 111

Inner wall 101 of the containing cavity 10

Outer wall 102 of recess 1011

The upper end surface 120 of the peripheral wall 12

Slotted 121 terminal assembly 2

Fixed terminal 21 first fixed terminal 211

First contact portion 2111 first weld portion 2112

First connection portion 2113 second fixed terminal 212

Convex hull 21211 of second contact part 2121

Second welding part 2122 and second connecting part 2123

Central part 221 of metal part 22

Ring portion 222 dust-proof sheet 3

Bulging portion 31

[ detailed description ] embodiments

Referring to fig. 1 to 6, a push button switch 100 of the present invention includes an insulating housing 1, a terminal assembly 2, and a dust-proof sheet 3 covering the insulating housing.

Referring to fig. 1 to 5, the insulating housing 1 includes a bottom wall 11 and a peripheral wall 12 protruding from the periphery of the bottom wall 11 and forming a receiving cavity 10 with the bottom wall 11, and the dust-proof sheet 3 is fixedly disposed on an upper end surface 120 of the peripheral wall 12 to cover the receiving cavity 10. Two pairs of grooves 111 which are arranged at intervals are concavely arranged on two opposite sides of the lower surface of the bottom wall 11. The peripheral wall 12 is provided with an inner wall 101 and an outer wall 102 disposed opposite the inner wall 101. A concave portion 1011 is concavely arranged inside the accommodating cavity 10. The peripheral wall 12 penetrates the inner wall 101 and the outer wall 102 to form a slot 121 for communicating the housing chamber 10 with the outside. The slot 121 is formed by recessing downward from the upper end surface 120 of the peripheral wall 12, and the slot has a substantially V-shaped structure.

Referring to fig. 4 and 5, the terminal assembly 2 is held in the insulating housing 1 and has a contact portion exposed in the receiving cavity 10 and a welding portion extending out of the bottom wall 11. In the present invention, the terminal assembly 2 includes a metal member 22 corresponding to the inner diameter of the accommodating cavity 10 and a fixing terminal 21 having the contact portion and the welding portion. The fixed terminal 21 is integrally formed with the insulating body 1. The fixed terminal 21 includes a first fixed terminal 211 and a second fixed terminal 212 provided separately from each other. The first fixed terminal 211 includes two first contact portions 2111 disposed at an interval, a first connection portion 2113 connecting the two first contact portions 2111 and embedded in the insulating body 1, and a pair of first welding portions 2112 extending outward from two ends of the first connection portion 2113 and located in the groove 111. The first welding portion 2112 is provided opposite to the first contact portion 2111.

Referring to fig. 4 to 6, the second fixed terminal 212 includes a second contact portion 2121 disposed in a circular shape and located between the pair of first contact portions 2111, a pair of second welding portions 2122 extending out of the outer surface of the peripheral wall 12 and received in the recessed groove 111, and a second connecting portion 2123 embedded in the insulating body 1 and connecting the second contact portion 2121 and the second welding portion 2122. The first connection portion 2110 and the second connection portion 2120 are oppositely disposed. The contact portion includes a first contact portion 2111 and the second contact portion 2121. The weld includes a first weld 2112 and the second weld 2122. The second welding part 2122 is located at both sides of the second contact part 2121. In the prior art, due to long-term use, dust or other foreign matters are easily accumulated on the second contact part of the second fixed terminal, and when the second fixed terminal is in contact with a metal piece, the conduction is easily caused to be in a problem due to the existence of the dust, so that poor contact is caused. In this application, the second contact portion 2121 includes a base portion 21212 and at least one convex protrusion 21211 integrally formed on the base portion 21212 and protruding upward. The convex hull 21211 is provided with a smooth top surface, so that dust is hard to fall on the convex hull 21211, and when the second contact part 2121 contacts with the metal member 22, conduction is not affected. Preferably, in this embodiment, three convex hulls 21211 are provided, the three convex hulls 21211 are arranged in a triangular shape, and only when dust falls on all the three convex hulls 21211 and none of the three convex hulls can contact with the metal part 22, the conduction in this application is affected, and the influence of the foreign matter on the conduction is reduced. In the present application, the original surface contact between the second contact portion 2121 and the metal part 22 is changed into the point contact between the convex hull 21211 and the metal part 22, so that the influence of foreign matters such as dust on the conduction is reduced.

The metal member 22 is installed in the accommodating cavity 10 from top to bottom, located above the fixed terminal 21 and located below the dust-proof sheet 3, and the second connecting body pressing the metal member 22 and the fixed terminal 21 downward includes a dome-shaped central portion 221 located above the second contact portion 2121 and not in contact with the second contact portion in the vertical direction, and a peripheral contact portion 2021 located in the central portion 221. The metal member 22 is substantially circular, but not limited thereto, and the metal member 22 has a ring portion 222 which is in normal contact with the first contact portion. The normal state refers to a state where the center portion is not pressed from top to bottom without influence of an external force. That is, the ring portion 222 of the metal 22 is in normal contact with the first contact portion 2111 of the first fixed terminal 211, and the central portion 221 of the metal 22 is pressed downward and then comes into contact with the second contact portion 2121 of the second fixed terminal 212. The position of the dust-proof sheet 3 corresponding to the central portion 221 is provided with a raised portion 31 protruding upward and allowing the central portion 221 to abut against, that is, the raised portion 31 of the dust-proof sheet 3 is higher than the region outside the periphery of the raised portion 31, so that a good pressing feeling of the push button switch 100 can be provided, and the raised portion 31 is pressed to drive the central portion 221 to move downward so that the central portion 221 contacts with the second contact portion 2121.

It should be noted that, in the present invention, the metal member 22 is a sheet structure made of stainless steel, and may be made of other metal materials, but it needs to ensure that it has better resilience.

The utility model discloses button switch 100 is through perisporium 12 sets up the fluting 121 that will accept chamber 10 and outside intercommunication to avoid accepting and form the negative pressure in the chamber 10 and inhale the scaling powder through the gap and accept chamber 10, in addition, outside dust entering can be effectively avoided to the fluting 121 of V-arrangement structure and the chamber 10 is accepted.

The above description is only a partial embodiment of the present invention, not all embodiments, and any equivalent changes that the technical solutions of the present invention take are covered by the claims of the present invention through reading the present invention.

Claims

1. A button switch comprises an insulating body with an accommodating cavity, a terminal assembly and a dustproof sheet for covering the insulating body, wherein the terminal assembly comprises a fixed terminal fixed on the insulating body and a metal piece covering the accommodating cavity and having the same inner diameter size as the accommodating cavity, the fixed terminal comprises a first fixed terminal and a second fixed terminal which are arranged separately, the first fixed terminal comprises a first contact part, the second fixed terminal comprises a second contact part, the metal piece comprises a dome-shaped central part which is positioned above the second contact part and is not in contact with the second contact part in the up-down direction normally and a ring part which is positioned on the periphery of the central part and is in contact with the first contact part normally, and the button switch is characterized in that: the second contact part comprises a base plate part and at least one convex hull which is integrally and upwards protruded from the base plate part and does not contact with the central part under normal state.

2. The push button switch of claim 1, wherein: the first fixed terminal includes a pair of the first contact portions, and the second fixed terminal includes one of the second contact portions, the second contact portion being located intermediate the pair of the first contact portions.

3. The push button switch of claim 1, wherein: the second contact part is provided with three convex hulls.

4. A push button switch according to claim 3, wherein: the three convex hulls are arranged in a triangular shape.

5. The push button switch of claim 1, wherein: the top surface of the convex hull is smoothly arranged.

6. The push button switch of claim 1, wherein: the insulating body is provided with a bottom wall and a peripheral wall which extends out of the periphery of the bottom wall and forms an accommodating cavity with the bottom wall, the dustproof sheet is fixedly arranged on the upper end face of the peripheral wall to cover the accommodating cavity, the metal piece is arranged in the accommodating cavity from top to bottom and is positioned above the fixed terminal and below the dustproof sheet, and the metal piece is pressed downwards to be in contact with the second contact part.

7. The push button switch of claim 6, wherein: the terminal assembly is fixed on the insulating body and is provided with a contact part exposed in the accommodating cavity and a welding part extending out of the bottom wall, the contact part comprises a first contact part and a second contact part, and the welding part comprises a first welding part arranged on the first fixed terminal and opposite to the first contact part and a second welding part arranged on the second fixed terminal and located on two sides of the second contact part.

8. The push button switch of claim 6, wherein: the peripheral wall is provided with an inner wall positioned in the containing cavity and an outer wall opposite to the inner wall, and the peripheral wall penetrates through the inner wall and the outer wall to form a groove for communicating the containing cavity with the outside.

9. The push button switch of claim 8, wherein: the slot is formed by downwards sinking from the upper end surface of the peripheral wall, and the slot is approximately in a V-shaped structure.

10. The push button switch of claim 1, wherein: the metal piece is of a sheet structure made of stainless steel.