CN213781894U

CN213781894U - Double-contact switch

Info

Publication number: CN213781894U
Application number: CN202120013324.4U
Authority: CN
Inventors: 陈爱华
Original assignee: Guangdong Ruixun Electronic Technology Co ltd
Current assignee: Guangdong Ruixun Electronic Technology Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-07-23
Anticipated expiration: 2031-01-05

Abstract

The utility model discloses a double-contact switch, including key seat, key axle and reset spring are established on the key seat, the key axle includes switch axle and a hollow shaft-column groove, switch axle bottom cover is equipped with reset spring, the shaft-column groove assembles in switch axle bottom; the switch assembly comprises a metal elastic sheet and a contact end matched with the metal elastic sheet, the metal elastic sheet is provided with two pushed bulges and two moving contacts, and the pushed bulges are positioned at the centers of the two moving contacts. Switch metal shrapnel's the intermediate position of establishing at two moving contact that receive to push away protruding, has avoided general contact point to be stained with the dust easily at the center, contact failure's problem, and the switch is open circuit state when not pressing, and metal shrapnel contact route after pressing, the stability of product is effectively strengthened in the setting of double contact, through key shaft drive metal shrapnel, and structural arrangement is reasonable, does benefit to the use.

Description

Double-contact switch

Technical Field

The utility model relates to a key switch field, concretely relates to double contact switch.

Background

Each button of keyboard all is an independent switch, also has a circuit board that corresponds the size with the bonding region position in the basement and guarantees normal operating, and the keyboard axis body is comprehensive surrounded by the plastics waterproof layer, and high revetment effectively blocks the direct axis body of invading of foreign matter, and the protection axis body avoids liquid to get into, nevertheless still difficult dust invasion and attack.

The existing keyboard is generally provided with only one contact point or a plurality of contact points are arranged at the center position, dust is easily adhered when the keyboard is switched on or off, poor contact is caused, and therefore the product is unstable in use.

SUMMERY OF THE UTILITY MODEL

To the above problem, the present invention aims to provide a stable double-contact switch.

In order to realize the technical purpose, the utility model discloses a scheme is: a double-contact switch comprises a key seat, a key shaft and a return spring, wherein the key shaft and the return spring are arranged on the key seat, the key shaft comprises a switch shaft and a hollow shaft column groove, the return spring is sleeved at the bottom of the switch shaft, and the shaft column groove is assembled at the bottom of the switch shaft;

the push-push type switch is characterized by further comprising a switch assembly, wherein the switch assembly comprises a metal elastic sheet and a contact end matched with the metal elastic sheet, the metal elastic sheet is provided with two push-push bulges and two movable contacts, the push-push bulges are positioned at the centers of the two movable contacts, and the shaft column groove is further provided with a push-push bulge used for extruding the push-push bulges so that the movable contacts can be in contact with or leave from the contact end.

Preferably, the pushing protrusion is of an upward inclined structure, and when the key shaft is bounced, the pushing protrusion presses the pushed protrusion upwards to enable the pushed protrusion to displace outwards, so that the movable contact is separated from the contact end, and the power supply is disconnected.

Preferably, the shaft column groove is provided with a notch, and the middle part of the switch shaft extends to form a flange matched with the notch.

Preferably, the switch shaft and the shaft column groove are designed as an integral structure.

Preferably, the contact end is provided with a static contact matched with the movable contact.

Preferably, the middle part of the contact end is provided with a concave platform matched with the pushed bulge, and the pushed bulge is arranged to protrude out of the concave platform.

The utility model has the advantages that: switch metal shrapnel's the intermediate position of establishing at two moving contact that receive to push away protruding, has avoided general contact point to be stained with the dust easily at the center, contact failure's problem, and the switch is open circuit state when not pressing, and metal shrapnel contact route after pressing, the stability of product is effectively strengthened in the setting of double contact, through key shaft drive metal shrapnel, and structural arrangement is reasonable, does benefit to the use.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic structural view of the key shaft of the present invention;

fig. 3 is a schematic structural view of the metal dome of the present invention;

fig. 4 is a schematic structural view of the contact end of the present invention;

fig. 5 is a schematic structural diagram of the switch assembly of the present invention.

Wherein: 1. a key base; 2. a key shaft; 21. a switch shaft; 211. a flange; 22. a shaft groove; 221. pushing the bulge; 222. a notch; 3. a return spring; 4. a switch assembly; 41. a metal spring sheet; 411. a pushed protrusion; 412. moving the contact; 42. a contact end; 421. a stationary contact; 422. a concave platform; 5. the key cap.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-5, the embodiment of the present invention is a dual-contact switch, in which two contacts can be connected to each other, so as to effectively prevent the contacts from being affected by foreign matters to cause bad contact of the switch, and enhance the stability of the product. The double-contact switch specifically comprises a key base 1, a key shaft 2, a reset spring 3 and a key cap 5 used for pressing the key shaft, wherein the key shaft 2 and the reset spring 3 are arranged on the key base 1, the key shaft 2 comprises a switch shaft 21 and a hollow shaft column groove 22, the reset spring 3 used for enabling the switch shaft to return after being pressed is sleeved at the bottom of the switch shaft 21, and the shaft column groove 22 is assembled at the bottom of the switch shaft 21.

The following two embodiments are provided between the shaft groove 22 and the switch shaft 21:

in the first embodiment, as shown in fig. 2, the shaft groove 22 is provided with a notch 222, the middle of the switch shaft 21 extends with a flange 211 matching with the notch, the shaft groove 22 is fixed on the key base 1, the shaft groove 22 and the switch shaft 21 are combined with the flange through the notch, when the key is pressed, the clicking sound can be generated, and the key can be applied to a green shaft.

In the second embodiment, the switch shaft 21 and the shaft groove 22 are designed as an integral structure, and the switch shaft and the shaft groove are combined together to be straight up and down, so that the pressing force is smaller, no sound is generated, and the switch shaft can be applied to a red shaft or a black shaft.

The improvement of this application lies in the switch module 4 that is used for controlling the switch-on or disconnection of button power, switch module 4 includes metal shrapnel 41 and with metal shrapnel assorted contact jaw 42, be equipped with on the metal shrapnel 41 and pushed protruding 411 and moving contact 412, moving contact 412 is equipped with two, and the protruding 411 center that is located two moving contact 412 that pushes away, still be equipped with on the shaft column groove 22 and be used for extrudeing the protruding top that pushes away and push up protruding 221, make moving contact 412 contact or leave contact jaw 42.

The pushing protrusion 221 of the present embodiment is an upward inclined structure, which can realize the effect of gradually pushing outward from bottom to top, when the key shaft 2 is bounced, the pushing protrusion 221 presses the pushed protrusion 411 upward, so that the pushed protrusion 411 moves outward, thereby making the movable contact 412 leave the contact end 42, the power is off, when the key shaft 2 is pressed down, the pushing protrusion 221 leaves the pushed protrusion 411 downward, the pushed protrusion 411 moves inward, thereby making the movable contact 412 contact with the contact end 42, and the power is on;

the contact end 42 is provided with a fixed contact 421 matched with the movable contact, when the movable contacts 412 on both sides are contacted with the fixed contact 421, the power is switched on, the pushed protrusion is arranged at the center of the movable contact, when the key shaft is pressed, the movable contact can be stably connected with the fixed contact 421, and poor contact caused by different pressing angles or foreign matters at one end can be avoided.

The middle of the contact end 42 is provided with a concave 422 matched with the pushed protrusion, the concave enables the pushed protrusion of the metal elastic sheet to have enough space to contact with the pushing protrusion, and the metal elastic sheet 41 and the contact end 42 are installed on the key base 1 through pins.

This switch metal shrapnel's the intermediate position of pushing away the arch and establishing at two moving contact, avoided general contact point to be stained with the dust easily at the center, contact failure's problem, the switch is open circuit state when not pressing, presses back metal shrapnel contact route, and the stability of product is effectively strengthened in the double contact setting, through key shaft drive metal shrapnel, and structural arrangement is reasonable, does benefit to the use.

The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.

Claims

1. A double-contact switch comprises a key seat, a key shaft and a return spring, wherein the key shaft and the return spring are arranged on the key seat, the key shaft comprises a switch shaft and a hollow shaft column groove, the return spring is sleeved at the bottom of the switch shaft, and the shaft column groove is assembled at the bottom of the switch shaft;

2. The dual contact switch of claim 1, wherein: the pushing bulge is of an upward inclined structure, and when the key shaft bounces, the pushing bulge extrudes the pushed bulge upwards to enable the pushed bulge to move outwards, so that the movable contact is separated from the contact end, and the power supply is disconnected.

3. The dual contact switch of claim 1, wherein: the shaft column groove is provided with a notch, and the middle part of the switch shaft extends to form a flange matched with the notch.

4. The dual contact switch of claim 1, wherein: the switch shaft and the shaft column groove are designed into an integral structure.

5. The dual contact switch of claim 1, wherein: and a static contact matched with the movable contact is arranged on the contact end.

6. The dual contact switch of claim 1, wherein: the middle of the contact end is provided with a concave platform matched with the pushed bulge, and the pushed bulge is arranged to protrude out of the concave platform.