CN205645625U

CN205645625U - Button switch

Info

Publication number: CN205645625U
Application number: CN201620482460.7U
Authority: CN
Inventors: 张光凯
Original assignee: Dongguan Desong Electronics Co Ltd
Current assignee: Dongguan Desong Electronics Co Ltd
Priority date: 2016-05-25
Filing date: 2016-05-25
Publication date: 2016-10-12
Anticipated expiration: 2026-05-25

Abstract

The utility model discloses a button switch, include the shell and connect in the base of shell bottom, the button subassembly is installed in proper order to the inside direction along from the top down of shell and base, a spring, contact piece and reference column, under key's lower part is provided with annular bulge, the upper portion of the inner wall of shell be provided with with this annular bulge matched with annular table terrace, the extreme position of under key upward movement is injectd to the annular table terrace, and form sealedly when the annular table terrace of under key's annular bulge and shell contacts between the annular table terrace of under key's annular bulge and shell. The beneficial effects of the utility model are that: good sealing performance has to widened application range, and structural design compact, save space resistant current rush, corrosion -resistant, resistant vibration.

Description

A kind of key switch

Technical field

This utility model relates to construction of switch technical field, particularly a kind of key switch.

Background technology

Press button refers to utilize button to promote drive mechanism, controls movable contact and is switched on or switched off and realizes, with stationary contact, the switch that circuit switches.Press button is widely used in electric automatic control circuit, press button generally individually comprises a pressing switch module, binding post, movable contact spring and static contact that pressing switch module mainly by type runners, is installed on type runners are constituted, the sidewall of type runners is provided with the extension spring retainer and stage clip retainer that can slide up and down, extension spring retainer is connected with movable contact spring and can control movable contact spring and is switched on or switched off with static contact, and stage clip retainer is positioned at the opposite side of extension spring retainer.Existing key switch sealing property is the strongest, it is impossible to water proof and dust proof, thus limits its range of application.

Utility model content

The purpose of this utility model is to overcome the shortcoming of prior art, it is provided that a kind of key switch.

nullThe purpose of this utility model is achieved through the following technical solutions: a kind of key switch，Including shell and the pedestal being connected to outer casing bottom，The inside of shell and pedestal is sequentially installed with button assembly along direction from top to bottom、Spring、Contact chip and locating dowel，The bottom of locating dowel is fixed on pedestal，Described button assembly includes lower button and is installed on the upper button on lower button top，Lower button、Spring and contact chip are set in the top of lead successively along direction from top to bottom，The bottom of lower button is provided with annular projection，The top of the inwall of shell is provided with the annular table terrace matched with this annular projection，Annular table terrace limits the extreme position that lower button moves upward，And the annular projection of lower button contact with the annular table terrace of shell button at present annular projection and the annular table terrace of shell between formed and seal，Annular table terrace limits and is provided with two the first silver points on contact chip，Two binding posts matched with two the first silver points are installed on pedestal，The top of each binding post is mounted on the second silver point，The lower end of each binding post is mounted on a terminal screw.

The top of described upper button is set with button medicated cap, and button medicated cap seals upper gap between button and outer casing inner wall.

The outer surface of described shell is provided with screw thread, and the outer cover of shell is equipped with nut.

This utility model has the advantage that

This utility model has good sealing property, thus has widened range, and structure is compact to design, save space, resistance to rush of current, corrosion-resistant, vibration resistance.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is detonation configuration schematic diagram of the present utility model.

In figure, 1-shell, 2-pedestal, 3-nut, 4-spring, 5-contact chip, 6-locating dowel, button under 7-, the upper button of 8-, 9-the first silver point, 10-binding post, 11-the second silver point, 12-terminal screw, 13-button medicated cap, 14-annular projection, 15-annular table terrace.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is further described:

nullSuch as Fig. 1、Shown in Fig. 2，A kind of key switch，Including shell and the pedestal being connected to outer casing bottom，The inside of shell and pedestal is sequentially installed with button assembly along direction from top to bottom、Spring、Contact chip and locating dowel，The bottom of locating dowel is fixed on pedestal，Described button assembly includes lower button and is installed on the upper button on lower button top，Lower button、Spring and contact chip are set in the top of lead successively along direction from top to bottom，The bottom of lower button is provided with annular projection，The top of the inwall of shell is provided with the annular table terrace matched with this annular projection，Annular table terrace limits the extreme position that lower button moves upward，And the annular projection of lower button contact with the annular table terrace of shell button at present annular projection and the annular table terrace of shell between formed and seal，Annular table terrace limits and is provided with two the first silver points on contact chip，Two binding posts matched with two the first silver points are installed on pedestal，The top of each binding post is mounted on the second silver point，The lower end of each binding post is mounted on a terminal screw.

Claims

null1. a key switch，It is characterized in that: include shell and be connected to the pedestal of outer casing bottom，The inside of shell and pedestal is sequentially installed with button assembly along direction from top to bottom、Spring、Contact chip and locating dowel，The bottom of locating dowel is fixed on pedestal，Described button assembly includes lower button and is installed on the upper button on lower button top，Lower button、Spring and contact chip are set in the top of lead successively along direction from top to bottom，The bottom of lower button is provided with annular projection，The top of the inwall of shell is provided with the annular table terrace matched with this annular projection，Annular table terrace limits the extreme position that lower button moves upward，And the annular projection of lower button contact with the annular table terrace of shell button at present annular projection and the annular table terrace of shell between formed and seal，Annular table terrace limits and is provided with two the first silver points on contact chip，Two binding posts matched with two the first silver points are installed on pedestal，The top of each binding post is mounted on the second silver point，The lower end of each binding post is mounted on a terminal screw.
A kind of key switch the most according to claim 1, it is characterised in that: the top of described upper button is set with button medicated cap, and button medicated cap seals upper gap between button and outer casing inner wall.
A kind of key switch the most according to claim 1, it is characterised in that: the outer surface of described shell is provided with screw thread, and the outer cover of shell is equipped with nut.