CN2170572Y

CN2170572Y - Improved key switch

Info

Publication number: CN2170572Y
Application number: CN 93240575
Authority: CN
Inventors: 颜正广
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-23
Filing date: 1993-09-23
Publication date: 1994-06-29
Anticipated expiration: 2003-09-23

Abstract

The utility model relates to a push-button switch, which is composed of an upper cover, a switch base, a control plate, a clamping plate, a partition plate, power guide pieces, and conducting pieces. The bottom of the switch base is provided with a clamping hook and a door holder; the back end of the clamping hook is provided with convex grains, and the front end is provided with a supporting base. The front end of the supporting base is provided with a recess, and the back end is provided with a jack. The conducting piece is in the shape of the Y and in the form of double contact points. Contact points, two wing pieces on both sides, pressing pieces in the middle, elongated slot inserting pieces, square holes, round holes are arranged in sequence from front to back and are matched with the recess, the clamping hook, and the convex grains for positioning. The upper cover is provided with a clamping tenon and a clamping opening and can matched with the door catch and the fastener of the clamping hook of the switch base for pressing and positioning the conducting pieces.

Description

Improved key switch

The utility model refers to especially that about a kind of key switch of improvement a kind of assembling is convenient, locatees firmly and contact respond well key switch.

Traditional key switch, of a great variety, too numerous to enumerate, but it uses day long afterwards mostly, it is bad to produce conductivity (or contact), that is using day long afterwards, bad because of the structural design of conducting strip own, and often the location takes place built on the sand, get loose easily, or phenomenon such as elastic fatigue, cause itself and power supply guide card contact bad eventually, obviously remain to be improved.

In view of this inventor sprouts the idea of improvement innovation, through the design of concentrating on studies for a long time, is initiated out the utility model eventually.

Main purpose of the present utility model is to provide a kind of assembling convenient, and the location is firm, and contacts respond well key switch.

Relevant the utility model is for achieving the above object and effect, and the concrete structure that is adopted is lifted now with next preferable possible embodiments, and details are as follows for conjunction with figs..

It shown in the figure one three-dimensional exploded view of the present utility model

It shown in the figure two combination stereogram of the present utility model

It shown in the figure three power supply guide card of the present utility model and the conducting strip schematic diagram when being positioned

Shown in the figure four cross-sectional schematic of control board of the present utility model when not pressing down as yet

It shown in the figure five cross-sectional schematic after control board of the present utility model is depressed

Wherein

(10) loam cake (11) tenon (12) snap openings

(20) switch base (21) knocker (22) clamping hooked

(23) protruding grain (24) supporting seat (241) jack

(25) depression (26) convex body (27) block body

(30) control board (31) button (32) spring

(33) projection (34) body (35) lug

(40) fastening plate (41) slot (42) spring

(50) demarcation strip (60) power supply guide card (70) conducting strip

(71) contact (72) fin (73) is pressed the work sheet

(74) elongated slot (75) inserted sheet (76) square hole

(77) circular hole

Shown in figure one, two, clearly the utility model roughly duplicates with the conventional keys switch on overall appearance kenel and structure, thereby can reach easily when assembling; By among the figure one-four, can learn further that again in the utility model, loam cake 10 has corresponding tenon 11 and knocker 21, snap openings 12 and clamping hooked 22 respectively with switch base 20, but the combination of two-phase buckle; Be provided with the conducting strip 70 that cooperates control board 30 actions 20 of loam cake 10 and switch bases, with energized electricity sheet 60, and have the fastening plate 40 of slot 41 and a spring 42 of one side, be assembled with one in fastening plate 40 1 sides and can prevent the demarcation strip 50 that 2 winding points contact simultaneously, and the control board 30 used of control action, this control board 30 is equiped with button 31 and spring 32 in loam cake 10 upper ends, then has horizontal projection 33 in middle both sides; The above structure is roughly all identical with the conventional keys switch, is not for feature of the present utility model place, so give unnecessary details no longer in detail.

The parts such as switch base 20, control board 30 and conducting strip 70 that are characterised in that of the present utility model:

Shown in figure one, two, three, on switch base 20 bottom surfaces, have protruding grain 23 in the rear end of clamping hooked 22, front end then has supporting seat 24, and the front end of this supporting seat 24 has a depression 25, and the rear end then has jack 241; In addition, on the switch base 20, the madial wall of knocker 21 1 ends has some convex bodys 26 and an elasticity block body 27, and convex body 26 has a gap just with the bottom surface, enter for L shaped power supply guide card 60, and by 27 backstop location of block body;

Conducting strip 70 is Y type two point shape, has in regular turn from front to back: contact 71, both sides fin 72, middle work sheet 73, elongated slot 74, inserted sheet 75, square hole 76 and the circular hole 77 etc. of pressing; Wherein, circular hole 77 is placed on the protruding grain 23, and square hole 76 is placed on the clamping hooked 22, and 75 of inserted sheets insert in the depression 25 and locate, shown in figure three;

Control board 30, shown in figure two, four, the part of its projection 33 lower ends can be passed the elongated slot 72 of conducting strip, and be arranged with one the insulation body 34, the front end of this body 34 has lug 35, can press down the pressure work sheet 73 of conducting strip 70, and its contact 71 is contacted with power supply guide card 60.

According to behind the above-mentioned tectonic association, shown in figure one-four, conducting strip 70 is positioned in the bottom surface of switch base 20, its end with loam cake 10 with engaging of switch base 20 cramping location, elongated slot 74 alignment receptacles 241 are passed for control board 30 bottoms, press work to levy 73 lugs that are butted on the insulation body 35 times; Fastening plate 40 and demarcation strip 50 are positioned on the supporting seat 24; Therefore, when control board 30 was not depressed as yet, the fastening plate 40 of one side can't touch demarcation strip 50; And be pressed down when making control board 30 descend push card plywood 40 and demarcation strip 50 when its horizontal projection 33 is and snap in the slot 41 of fastening plate when button 31; The lug 35 of body 34 front ends presses down the pressure work sheet 73 of conducting strip 70 simultaneously, presses work power to prolong with it and is passed to two fins 72, the contact 71 of its front end is contacted with power supply guide card 60, and be the power connection state, shown in figure five.

By above explanation as can be known, the utility model possesses following advantage and effect at least, more than conventional switch progress practicality:

(1) at fit on, no matter the assembly between loam cake 10 and the switch base 20, or power supply guide card 60 is positioned on the switch base 20 with conducting strip 70, all need not rivet, and only utilize engaging (pulling) or fit mode to reach, obviously quite simple and fast.

(2) on the location: because of conducting strip 70 inserts depression 25 with its inserted sheet 75, and circular hole 77 is placed on the protruding grain 23 and can locatees, with the buckle of loam cake 10, can further again conducting strip 70 cramping packings be reached clip and locate firm effect again with clamping hooked 22 with the snap openings 12 of switch base 20; The vertical end of power supply electric waveguide plate 60 is with the fit of its circular hole 61 and protruding grain 23, and horizontal ends then can be inserted the gap under the convex body 26, and is terminal again with the backstop of tool elasticity block body 27, therefore also quite firmly is difficult for slippage on the location.

(3) in contact: because of power supply guide card 60 and firm unlikely the getting loose in conducting strip 70 location, and conducting strip 70 is the two point shape of Y type again, therefore, conducting strip 70 can press down with control board 30 easily, lug 35 with the insulation body presses down middle pressure work sheet 73 again, contact 71 can be contacted with power supply guide card 60 really, and contact is good.

(4) on elasticity: because of conducting strip 70 is the two point shape of Y type, in the time of on the bottom surface that is assembled in switch base 20, stick up the back level state before being, moreover it presses the work point to be positioned at the front end centre position; Therefore, when lug 35 pressed down pressure work sheet 73, it pressed work power to prolong the fin 72 that is passed to both sides naturally, and descends thereupon, and its contact 71 is contacted with power supply guide card 60, so have favorable elasticity, is difficult for tired.

To sum up institute is old, and the concrete structure that the utility model embodiment is disclosed is seen shown in preceding, and it is convenient to have an assembling, and the firm and good special efficacy that waits of contact in location also possesses practicality, the existing utility application that in accordance with the law proposes.

Claims

1, a kind of key switch comprises:

One loam cake has tenon and some snap openings;

One switch base has knocker and some clamping hooked, to combine with snap openings with the tenon of loam cake, has protruding grain in the clamping hooked rear end, and front end then has a jack;

One control board is assembled between loam cake and the switch base, and its upper end at loam cake is set with button and spring, and middle both sides then have horizontal projection, and the lower end then is with an insulation body with lug;

One fastening plate is assembled between loam cake and the switch base, has slot on it, and a side has spring;

One demarcation strip is assembled between loam cake and the switch base, and is positioned at one of demarcation strip side;

One power supply guide card is assembled between loam cake and the switch base, and is positioned at one of demarcation strip side;

One power supply guide card, slightly L-shaped, be assembled in switch base bottom surface side; And

One conducting strip is assembled in the bottom surface of switch base, and is positioned at control board below, and its front end and have contact can contact with the power supply guide card;

It is characterized in that: this switch base bottom surface is positioned at the clamping hooked front end, has some supporting seats, and end has a depression before the supporting seat; And conducting strip is assembled on the switch base bottom surface, and have contact in regular turn from front to back, elongated slot, inserted sheet, square hole and circular hole; Wherein groove alignment receptacles is passed for the control board bottom, and inserted sheet inserts in the depression of supporting seat front end, and square hole is placed on the clamping hooked, and circular hole then is placed on the protruding grain, the conducting strip fit can be located; With the buckle of loam cake and switch base, further with the packing of conducting strip cramping, it is firm to reach the location again, assemble convenient and contact well.

2, according to the described key switch of claim 1; Wherein, described conducting strip is the two point shape of Y type, and its front end both sides have two fins, and the centre then has is pressing sheet, is descended for pressing.