CN1395269A

CN1395269A - Safety switch of push-pressing type

Info

Publication number: CN1395269A
Application number: CN 01120224
Authority: CN
Inventors: 游聪谋
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-10
Filing date: 2001-07-10
Publication date: 2003-02-05
Anticipated expiration: 2021-07-10
Also published as: CN1152404C

Abstract

The push-press safety switch is mainly composed of the switch main body, at least two connection terminals and linkages. The linkages setup at the inner side of the switch main body and controlled by the push-press lamp cover toggles the presprining of the bimetal conduction strip connected to the connection terminals. there are the push body and the bent fastener arm on the push-press lamp cover. The action of push body makes the deflector rod turning. When the deflector rod reaches the certain turning position, the bent fastener arm fastens the clip, making the push-press lamp cover locate at the preset position. The invention controls the on/off state of the conduction strip by the press mode and when the current is overloaded, the conduction strip is reset so as to form the open circuit.

Description

Safety switch of push-pressing type

One, technical field

The present invention relates to a kind of safety switch of push-pressing type, particularly relate to a kind of connection rod set of utilizing and realize the safety switch of push-pressing type of oppositely beating.

Two, background technology

Press, switch of a great variety, commonly used have seesaw type switch and a push switch etc.Early stage seesaw type switch and push switch only have on-off function, and escape automatically when current overload uses safety inadequately.Therefore, can make during overload power device automatically the safety switch of outage arise at the historic moment.Yet early stage safety switch is main kenel with seesaw type switch, and push switch is because of being subjected to the restriction of internal structure, and the design of rare safety switch.

Figure 1A and Figure 1B are depicted as a kind of seesaw type safety switch, and it utilizes deflecting of push-press lamp cover 11 and realizes the switching of break-make, and when conducting strip 12 current overloads, can realize that automatic escape forms to open circuit.

Yet computer that has or computer product relatively are fit to adopt push switch, and therefore, people also start to develop the safety switch of push-pressing type with current overload escape.Promptly a kind of improved safety switch of push-pressing type shown in Fig. 2 A and Fig. 2 B, it mainly comprises body 21, button 22 and movable block 23, wherein button 22 and movable block 23 are bonded into one, movable block 23 right flanks are provided with the clip location notch 24 of one " heart " shape, right terminal 25 ends upwards engage a bimetallic drawing piece 26 that is formed by two kinds of heterogeneity metal composite, the top of drawing piece 26 be provided with a snap pin 261 and stretch into movable block 23 and clip location notch 24 in; Utilize this structure, make pressing key 22 utilize the snap pin 261 of the bimetallic drawing piece 26 of the clip location notch 24 of movable block 23 and right terminal 25 to form buckles with the path between Lead-through terminal, and when current loading is excessive, produce high heat, and conduct to bimetallic drawing piece 26 through right terminal 25, it is heated and bending to the right, make snap pin 261 break away from buckles, and button 22 is subjected to the effect of main spring 27 to go up to reset to form to open circuit.

Above-mentioned safety switch of push-pressing type is unsatisfactory, even is difficult to carry out.Shown in Fig. 2 B, in the middle of terminal 28 and right terminal 25 make because of conduction seat 29 moves down its electric contact 291,292 respectively with its on electric contact 281,251 when connecting, current loading in, on right two-

terminal

28,25 and the conduction seat 29, but not directly be created on the bimetallic drawing piece 26, therefore can't determine the size of load, and high temperature is wayward, when short circuit high temperature is passed to right terminal 25 and passes to bimetallic drawing piece 26 again with heat exchange pattern by conduction seat 29, have little time to be out of shape escape at all and produce danger.In addition, above-mentioned switch must have 4 electric contacts 281,291,292,251, only has two electrical contact switch to compare with other, and structure is more complicated and impracticable.

Other has a kind of safety switch of push-pressing type, also is to utilize " heart " shape clip location notch principle to make button have two sections positioning functions.This safety switch of push-pressing type structure is very complicated, except elements such as housing, pushbutton unit, conductive reed, still need and before conductive reed, establish spring leaf, and trip is set, but also comprises that an insulation matte is fixed in the housing in the mode of horizontal slip and push the front end of conductive reed to the elastic mechanism matte that will insulate in the button bottom side.Thus, will make its assembling inconvenience and cost very high, the more important thing is, when wherein a certain element breaks down, all will make conductive reed escape fully when current overload.Therefore, be not to be perfectly safe during use.

Three, summary of the invention

Purpose of the present invention promptly is to provide a kind of can form the safety switch of push-pressing type that opens circuit automatically when current overload, thereby guarantees Electrical Safety.

To achieve these goals, the present invention utilizes Switch main body, at least two binding posts and connection rod set to constitute a kind of safety switch of push-pressing type.Switch main body is the hollow square box, and its top is provided with a push-press lamp cover and is provided with reseting elastic element; Be installed with an electric contact on second binding post, connection one is installed with another electric contact corresponding to the electric contact on second binding post by the conducting strip that bimetallic is composited on the conducting strip on first binding post; Connection rod set is made of driving lever and changer lever and is located at the Switch main body inner side edge, is respectively equipped with corresponding to changer lever and driving lever fastening convex side in the push-press lamp cover and pushes away body and bent fastener arm.

Based on above structure, utilize and to push mode may command conducting strip and be conducting or off-state, and can when current overload, reset smoothly to form and open circuit, thereby guarantee Electrical Safety.

Be described in further detail below in conjunction with the technical characterictic of specific embodiment safety switch of push-pressing type of the present invention.

Four, description of drawings

Figure 1A is the stereo appearance figure of existing seesaw type safety switch;

Figure 1B is the cutaway view of existing seesaw type safety switch;

Fig. 2 A is the stereogram of existing safety switch of push-pressing type;

Fig. 2 B is the cutaway view of existing safety switch of push-pressing type;

Fig. 3 is the embodiment stereo appearance figure of safety switch of push-pressing type of the present invention;

Fig. 4 is the three-dimensional exploded view of safety switch of push-pressing type braking element of the present invention;

Fig. 5 partly cuts open schematic diagram for the side-looking of safety switch of push-pressing type of the present invention;

Fig. 6 is an I-I cutaway view among Fig. 5;

Fig. 7 A-Fig. 7 E is respectively the various variation schematic diagrames of pushing of safety switch of push-pressing type of the present invention;

Fig. 8 is an II-II cutaway view among Fig. 6.

Five, embodiment

Shown in figure 3,4,5, safety switch of push-pressing type of the present invention mainly comprises Switch main body 3 and connection rod set 7.

Switch main body 3 is the hollow square box, and its top is provided with a push-press lamp cover 4, and the bottom of push-press lamp cover 4 is provided with the flexible member 41 that is used to reset; The side of Switch main body 3 offers cannelure 31, and the set guiding projection 44 in push-press lamp cover 4 corresponding positions can embed in the cannelure 31 and straight skidding therein; At least be provided with two binding posts, 5, the second binding post 5b in the Switch main body 3 and be provided with an electric contact 51, and be connected to conducting strip 6 on the first binding post 5a, be installed with another electric contact 61 corresponding to the second binding post 5b electric contact 51 on the conducting strip 6; In addition, the 3rd earthy binding post 5c also can be set as required.

Connection rod set 7 is arranged at the inner side edge of Switch main body 3 and mainly comprises driving lever 71, changer lever 72 and little flexible member 73; One end of driving lever 71 articulates and is positioned in the Switch main body 3, its pivot joint mode can adopt pivot connecting elements such as bearing pin, be inverted impulse body then in the present embodiment with the cylinder 711 that is located in the bottom, making driving lever 71 is pivotal point with this end, but and other end beat, and its epimere is provided with beat limit body 712, and the stage casing is provided with the fastening convex side 714 that cramping body 713, one sides that can stir conducting strip 6 spring ends are provided with location usefulness; The bottom of changer lever 72 is articulated in driving lever 71 upper ends, and it is spacing that its diversion section is subjected to both sides, driving lever 71 upper end limit body 712, makes itself and driving lever 71 present the interlock state of the left and right sides deflection of a predetermined angle; Little flexible member 73 is connected between driving lever 71 and the changer lever 72, so that the deflection angle position, the left and right sides that both can be positioned to be scheduled to.

In addition, be provided with corresponding to the position of connection rod set 7 in the bottom side of push-press lamp cover 4 and push away body 42 and bent fastener arm 43, the changer lever 72 that pushes away body 42 aligning connection rod set 7 also can be offset and driving lever 71 is turned to by ejection changer lever 72 when promote push-press lamp cover 4, and bent fastener arm 43 can utilize the fastening convex side 714 that body 431 fastens driving lever 71 sides that colludes of bottom when driving lever 71 arrives predetermined deflection angle, makes push-press lamp cover 4 be positioned at the precalculated position and unlikely upwards bouncing up resets.Pushing away body 42 and bent fastener arm 43 can become the interlock state with push-press lamp cover 4 is one-body molded, certainly, refills after also can independent moulding and is located at push-press lamp cover 4 belows and becomes continuous action relation with it.

With reference to shown in Figure 6, when push-press lamp cover 4 is subjected to pushing when moving down, push away body 42 and will touch the right flank of changer lever 72 earlier, because its limited body 712 contacts in left side, so changer lever 72 left upper ends can not be to bottom offset, and when pushing away body 42 and continue to move down, the right flank of changer lever 72 is subjected to left an active force, making connection rod set 7 is that pivotal point is offset left along circle camber line R with cylinder 711, when connection rod set 7 surpasses center line X, the cramping body 713 of driving lever 71 has driven conducting strip 6 skews and has surpassed center line X, this moment, conducting strip 6 was because the elastic force that elasticity of itself or add ons are executed and moment reversal deformation (characteristic of bimetallic conducting strip 6), impel connection rod set 7 beat left, cause the changer lever 72 of top to run into the internal face of Switch main body 3 and oppositely right-hand rotation earlier, this moment, little flexible member 73 elder generations were by tension, when changer lever 72 deflection to the right, form auxiliary elastic force of shrinking then again, but this moment changer lever 72 right flanks be pushed body 42 stop and can't switch to predetermined angular＜shape, therefore, when push-press lamp cover 4 is decontroled, when pushing away body 42 and rising to the position that can cut changer lever 72 upper ends, connection rod set 7 can switch to and the right side〉shape is fully opposite and symmetrical＜the shape attitude.The present invention utilizes such principle and mechanism and utilizes the mode of pushing to come diverter switch to be the action of on-off.

Shown in figure 7A-Fig. 7 E, Fig. 7 A is that switch is off-state, so push-press lamp cover 4 is subjected to the upwards elastic force of flexible member 41 and make its end face be in the last initial point a of extreme higher position; Connection rod set 7 then is the kenel of right avertence, makes that the cramping body 713 on its driving lever 71 is dialled to the right (as shown in Figure 8) with the free end of conducting strip 6, and this moment, the electric contact 61 of conducting strip 6 separated with the electric contact 51 of the second binding post 5b, so switch is an off state.

Shown in figure 7B, when push-press lamp cover 4 is pressed, to be forced into down initial point c by last initial point a, this moment is by principle shown in Figure 6, connection rod set 7 has been passed surpasses center line X and skew left, and changer lever 72 reverse deflections, that is the right flank 721 of changer lever 72 leans against the left surface that pushes away body 42 and can't become＜shape; Again, this moment bent fastener arm 43 collude the below that body 431 has arrived initial point c down by last initial point a and has been positioned at the fastening convex side 714 of driving lever 71.

Shown in figure 7C, when push-press lamp cover 4 is decontroled, the elastic force of flexible member 41 will make it upwards go up, the body 431 that colludes of bent fastener arm 43 went back up to fastening convex side by following initial point c and fastened fastening convex side 714 and rest on anchor point b this moment, push-press lamp cover 4 is also got back to the b point, make and push away body 42 risings and the unlikely changer lever 72 that stops, so, changer lever 72 be subjected to the clamping elastic force of opposition or little flexible member 73 and oppositely become predetermined angle＜shape, and utilize cramping body 713 that the free end of conducting strip 6 is dialled to the left (shown in Fig. 8 dotted line) from the right side, its electric contact 61 is with another contact 51 and contacts conduction state.So far, switch is the energising user mode, connection rod set only has the fastening convex side 714 of driving lever 71 to be positioned on the bent fastener arm 43 7 this moments, so that push-press lamp cover 4 unlikely rises are to the last initial point a that disconnects, but changer lever 72 with push away 42 no any contacts of body, and push away the top, left side that body 42 is positioned at changer lever 72, make it that enough spatial alternation directions be arranged.Therefore, it is high when hot that conducting strip 6 is produced, conducting strip 6 with reversal deformation characteristic will be by the left side spring to the right side, electric contact 61 on making it disengages with another electric contact 51, drive driving lever 71 deflection to the right simultaneously, and lean on to the right in the lump together with changer lever 72, and the frictional force that the metamorphosis power of conducting strip 6 is colluded body 431 much larger than driving lever 71 fastening convex sides 714 and bent fastener arm 43, therefore, connection rod set 7 can turn right smoothly to and get back to position shown in Fig. 7 E, the bent fastener arm 43 of push-press lamp cover 4 has broken away from the fastening convex side 714 of driving lever 71 at this moment, utilize the active force of flexible member 41 and smooth initial point a on the homing, automatically switch into the function of off-position when this is current overload.

Shown in Fig. 7 D, during normal the use, when desire switches to disconnection with switch by conducting, push-press lamp cover 4 can be pressed to down initial point c by the b point, the left surface of changer lever 72 was subjected to pushing away the ejection of body 42 and was subjected to the right active force this moment, make its opposite direction shown in Fig. 7 B be offset (shown in Fig. 7 E) to the right, this moment, block holder 714 broke away from bent fastener arm 43, therefore when unclamping push-press lamp cover 4, then by the following initial point c supreme initial point a that gos up, push away body 42 this moment and also rise thereupon, make that the left side of changer lever 72 is unrestricted and utilize little flexible member 73 chucking power and left deflection return back to the state shown in Fig. 7 A.This shows, the present invention when making switch be conducting state, the transition activities shown in Fig. 7 A → B → C; And will switch to off-state the time, transition activities shown in Fig. 7 C → D → E then.Therefore, what connection rod set among the present invention 7 cooperated push-press lamp covers 4 pushes away body 42 and bent fastener arm 43, can realize the conducting of push switch or the switching of disconnection; And abandoned the design of the heart-shaped clamping groove of existing two-part, its structure is more simple, and conducting strip 6 upright being located in the Switch main body 3 set than keeping flat, and its assembling is more convenient.

Certainly, the present invention is except that using as general push switch, and open connection rod set 7 can be automatically with the switch outage, to guarantee Electrical Safety when current overload.In addition, connection rod set 7 among the present invention is applicable to the conducting strip of the various different types of present commercially available safety switch, conducting strip 6 wherein shown in Figure 8 is a kind of simple bimetallic conducting strips, its outer end must utilize an arc spring lamination 62 and make it in predetermined disconnection/conduction position location, when its during at conduction position, as current overload then can reversal deformation and metamorphosis power greater than the elastic force of arc spring lamination 62, therefore can return back to the disconnection original position smoothly.Certainly, connection rod set 7 among the present invention is not the above-mentioned conducting strip 6 that only is applicable to that the application proposes, but it is every overheated or cross the bimetallic conducting strip of the reversal deformation of moment when cold, all can utilize connection rod set 7 to control its break-make, conducting strip 12 shown in Figure 1B is to utilize the upright mode of both sides condensation group to constitute, but make two-way contact spring 121 moment reversal deformation and location in the middle of it, then need any auxiliary element, can utilize connection rod set 7 to stir and make it be the on/off switching for this kind conducting strip.

In sum as can be known, the present invention really can reach its intended purposes, and has industrial utilization.

Claims

1, a kind of safety switch of push-pressing type comprises Switch main body and at least two binding posts; Switch main body is the hollow square box, the flexible member that its top is provided with a push-press lamp cover and is provided with the usefulness that resets; Be installed with an electric contact on second binding post, the conducting strip that connection one is composited by bimetallic on first binding post, and be installed with another electric contact corresponding to the electric contact on second binding post on the conducting strip; The invention is characterized in described Switch main body inner side edge be provided with by driving lever, changer lever constitute and the lampshade control of being pressed to stir the connection rod set of described conducting strip; One end of driving lever articulates and is positioned in the Switch main body, but other end beat and be provided with the beat limit body, but driving lever is provided with the free-ended cramping body of interlock conducting strip, and its side is provided with fastening convex side; Changer lever is articulated in driving lever upper end and is the deflection interlock state of a predetermined angle with driving lever; Be respectively equipped with corresponding to changer lever and driving lever fastening convex side in the push-press lamp cover and push away body and bent fastener arm.

2, safety switch of push-pressing type according to claim 1 is characterized in that being provided with between the driving lever of described connection rod set and the changer lever the little flexible member that is used for the predetermined angle of auxiliary deflection location.

3, safety switch of push-pressing type according to claim 1 is characterized in that described to push away body and bent fastener arm and push-press lamp cover one-body molded.

4, safety switch of push-pressing type according to claim 1, it is characterized in that described push away body and the button arm independence moulding and with the push-press lamp cover interlock.