CN2686072Y

CN2686072Y - Micro-switch

Info

Publication number: CN2686072Y
Application number: CN 200320104055
Authority: CN
Inventors: 潘安青
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-19
Filing date: 2003-10-19
Publication date: 2005-03-16
Anticipated expiration: 2013-10-19

Abstract

The utility model provides a micro-switch, comprising a base, two guide vanes, a cover and a contact handle which are fixed on the base. An elastic sheet seat is arranged in the base; an elastic sheet is arranged in the elastic sheet seat; the lower section of the elastic sheet branches off to become a long contact sheet and a short contact sheet; the long contact sheet is normally contacted with a guide vane; the short contact sheet is frequently separated from the other guide vane, and is contacted with the other guide vane in the condition that the contact handle is pushed. The micro-switch adopts the contact mode of the elastic sheet so that the micro-switch has the advantages such as short conducting distance and large contact area; the contact resistance is below 100m omega; the service life is above 50 thousand times; moreover, in the contact handle pushing process, the gap interruption phenomenon can not happen when the short contact sheet moves on the surface of the guide vane; due to the fact that the processing cost of the elastic sheet is low, the total cost can be reduced for 10 percent-20 percent.

Description

A kind of microswitch

One, technical field

The utility model relates to a kind of microswitch.

Two, background technology

At present, a kind of microswitch and electric drilling match use the break-make of circuit are controlled automatically, have been extensive use.As being used for the SPP310400 type microswitch of DVD at present, it comprises base and is fixed in two guide cards of base, covers and touch handle, the built-in spring of base, spring one end contacts with a guide card, touch handle and advance, the spring other end is contacted with another guide card, connect circuit by external force (as using electrical micro-machine); External force disappears, spring reset, and circuit interrupts automatically.Though it has satisfied general instructions for use, but owing to take the spring way of contact, the conducting distance, therefore contact area is little, and not only technical indicator is not very good, as contact resistance at 400m Ω～500m Ω, useful life is more than 30,000 times, and touch in the process of handle in propelling, the phenomenon that (about 0.3 microsecond) interrupted in the gap appears in the spring contact point when the guide card surface activity, and spring and the gold-plated cost height of spring.

Three, utility model content

The purpose of this utility model is to provide a kind of microswitch, and its contact resistance is low and contact is reliable, long service life, and production cost is low.

For achieving the above object, the solution that the utility model is taked is: a kind of microswitch, it comprises base and is fixed in two guide cards of base, covers and touch handle, the built-in shell fragment seat of base, this shell fragment seat internal fixation one shell fragment, this shell fragment is bifurcated and become long contact chip and the short circuit contact down partly, and long contact chip often contacts with a guide card, and the short circuit contact often separates with another guide card and has only the propelling of working as to touch handle ability and contacts with another guide card.

The utility model adopts the shell fragment way of contact, compared with prior art, has conducting apart from weak point, advantage that contact area is big, contact resistance is below 100m Ω, useful life is more than 50,000 times, and touch in the process of handle in propelling, the phenomenon that interrupt in the gap can not appear in the short circuit contact when the guide card surface activity; Because the shell fragment processing cost is low, total cost can reduce by 10%～20%.

Four, description of drawings

Fig. 1 is the upward view of present embodiment.

Fig. 2 is the right view of present embodiment.

Fig. 3 is the front view of present embodiment.

Fig. 4 is the section cut-away view of a kind of microswitch shown in Figure 1.

Among the figure: 1, touch handle, 2, lid, 3, base, 4, guide card, 5, guide card, 6, the shell fragment seat, 7, shell fragment, 71, the short circuit contact, 72, long contact chip.

Five, embodiment

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Referring to Fig. 1～Fig. 5, a kind of microswitch, it comprises base 3 and is fixed in two guide cards 4 and 5 of base 3, lid 2 and touches handle 1, base 3 built-in shell fragment seats 6, this shell fragment seat 6 internal fixation one shell fragment 7, this shell fragment 7 times is bifurcated and become long contact chip 72 and short circuit contact 71 partly, and long contact chip 72 often contact with a guide card 5, and short circuit contact 71 and another guide card 4 be normal to be separated and have only the propelling of working as to touch handle 1 ability and contact with another guide card 4.

Guide card 4 and 5 is inserted in the wiring board during use, and this microswitch is as the auto switching control of a certain circuit.

Claims

1, a kind of microswitch, it comprises base (3) and is fixed in two guide cards (4 and 5) of base (3), lid (2) and touches handle (1), it is characterized in that: the built-in shell fragment seat (6) of base (3), this shell fragment seat (6) internal fixation one shell fragment (7), this shell fragment (7) descends the part bifurcated and becomes long contact chip (72) and short circuit contact (71), long contact chip (72) often contacts with a guide card (5), and short circuit contact (71) often separates with another guide card (4) and has only when advancing and touch handle (1) and just contact with another guide card (4).