CN2641810Y

CN2641810Y - Safety switch

Info

Publication number: CN2641810Y
Application number: CN 03249010
Authority: CN
Inventors: 游聪谋
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-23
Filing date: 2003-09-23
Publication date: 2004-09-15
Anticipated expiration: 2013-09-23

Abstract

The utility model relates to a safety switch that is to arrange an alloy metal sheet and a plurality of conductor contacts in a main body. A pressing device is arranged outside the main body. The alloy metal sheet is molded as a plate-shaped body, is provided with the function of two-way warp, and is integrated with a strutting device. A first spring is positioned between the strutting device and the main body; and a second spring is arranged between the strutting device and a pressing device. The pressing device is operated to control the contact of the alloy metal sheet and the conductor contacts to form a pathway or to ensure the isolation of the alloy metal sheet from the conductor contacts to form an open circuit. When the pathway is formed between the alloy metal sheet and the conductor contacts, and the temperature of the alloy metal sheet is raised due to the electric current over-load, the alloy metal sheet becomes warped and reshaped, and then the alloy metal sheet is separated from the conductor contacts so as to secure the use of the electricity.

Description

Safety switch

Technical field

The utility model relates to a kind of switch of electric component, and is particularly a kind of when electric current surpasses load, can allow the automatic switch jump outage to guarantee Electrical Safety, do not need the switch of other installation insurance silk or circuit breaker.

Background technology

The mode of operation of general mains switch has two kinds of vertical pressing formula and seesaw types substantially, no matter be any mode, all be that the intrinsic conducting strip of driving switch contacts with the formation current path simultaneously with two conducting terminals by pressing button, or conducting strip and two conducting terminals are broken away to open circuit with formation.

Fig. 1 and Fig. 2 show the structure of a kind of vertical pressing formula mains switch in the prior art for example, are provided with two conducting terminals 7 and the conducting strip 27 that possess fixed contact 9 in a body 1, and the below at conducting strip 27 two ends then is provided with movable contact 271; Body 1 top is provided with a press device 25, is provided with second spring 23 between described press device 25 and the conducting strip 27, is provided with first spring 11 between conducting strip 27 and body 1 inside following; Wherein, the elastic force of first spring 11 is greater than the elastic force of second spring 23, make press device 25 not be subjected to external force to do the time spent, toward top jack-up, two movable contacts 271 that cause conducting strip 27 break away from the fixed contact 9 of two conducting terminals 7 elastic force that utilizes first spring 11 and formation is opened circuit (as shown in Figure 1) with conducting strip 27.When operation press device 25 is depressed toward the below, strength toward the below will be compressed second spring 23, and then make the elastic force of the active force of second spring 23 greater than first spring 11, make conducting strip 27 move and make its movable contact 271 contact formation path (as shown in Figure 2) with the fixed contact 9 of conducting terminal 7, and utilize press device 25 structural devices own and remain on this kind channel status toward belows; And when pushing once more and decontroling button 252, then second spring 23 loses applied external force, thereby the elastic force of first spring 11 causes conducting strip 27 to be formed by first spring, 11 jack-up again and opens circuit again greater than the elastic force of second spring 23.

In the unstable area of power supply, the time have the situation of current overload to take place, use if electric consumer's this moment can't discover this phenomenon and continue, it is overheated to produce overload, and then causes electric wire to cock off even the public danger of fire, the use potential collision hazard of formation switch.Based on the consideration of Electrical Safety, general circuit design can use fuse or circuit breaker that the security mechanism that prevents current overload is provided, but this design will make circuit comparatively complicated, and cost is also higher.Thereby still had the design that directly safeguard construction is arranged on switch inside afterwards, as United States Patent (USP) the 5th, 786, No. 742, the 5th, 223, No. 813, the 4th, 937, No. 548, the 4th, 661, No. 667, the 5th, 223, No. 813, the 4th, 93 1, No. 762, the 5th, 451, No. 729, the 4th, 704, No. 594 grade all belongs to this type of.But these aforementioned patent all have common shortcoming, and promptly the assembly after button is many, and the stroke complexity of interlock except increasing manufacturing cost, also will increase because of assembly causes the chance of fault more.

For example United States Patent (USP) the 5th, 223, No. 813 disclosed structures, after its button press, the connecting rod of elder generation movement buttons below swings up and down assembly via what connecting rod linked, compresses or the elastic contact chip that loosens its below makes contact under its upper contact contact or the escape and conducting or cut off circuit again; Under perfect condition, should not have the problem of manipulating, yet the complicated cost that produces of this assembly is higher, increases operating trouble and reflect that slow distinct disadvantage still exists, become manufacturing and user's common issue with.

Summary of the invention

Subject matter to be solved in the utility model, be the conventional power source switch spare part too much, interlock stroke complexity, manufacturing cost be higher, and the shortcoming that causes the fault chance to increase because of spare part is more.

The utility model solves the technological means of aforementioned known switch, be that an alloy piece with break-in warpage function is set in Switch main body inside, the below of this alloy piece is provided with first spring, the top is provided with second spring and press device, and this alloy piece is located at a bracing or strutting arrangement, when operating this press device, can make alloy piece keep contacting simultaneously and the state that conducts electricity, or make alloy piece and the disengaging of complex conduction terminal with the complex conduction terminal that is located at Switch main body.When the alloy piece maintenance contacts simultaneously with the complex conduction terminal that is located at Switch main body, if current overload causes the temperature of alloy piece to raise, can make alloy piece is that the center produces buckling deformation with its breakover point, causes alloy piece and conducting terminal to break away from outage.

Compare with the design of existing power supply safety switch, structure of the present utility model is because more simplify, thereby the quantity of spare part more reduces, and makes manufacturing cost more reduce, the interlock stroke of structure more shortens, and is minimized switch because of the too much and issuable failure rate of element.

Description of drawings

Fig. 1 is the section plan of known switch in the structure of off state.

Fig. 2 is the section plan of known switch in the structure of channel status.

Fig. 3 is for showing the three-dimensional exploded view of each elements combination relation of the utility model.

Fig. 4 is for showing the section plan of switch of the present utility model in the structure of channel status.

Fig. 5 is for showing the section plan of switch of the present utility model in the structure of off state.

Among the figure

1 body, 10 protuberances

5 bottoms, space in 3

7 conducting terminals, 9 fixed contacts

11 first springs, 13 cylinders

15 alloy pieces, 151 breakover points

17 holes, 19 movable contacts

21 setting elements, 23 second springs

25 press devices, 251 movable axis

2511 guide pillars, 252 buttons

2521 projections, 253 pedestals

2531 guide grooves, 27 conducting strips

271 movable contacts

Embodiment

Existing conjunction with figs. is described further embodiment of the present utility model, can understand technical characterictic of the present utility model more.Wherein Fig. 3 is for showing the three-dimensional exploded view of each elements combination relation of the utility model, the body 1 that is comprised in the described element has the space 3 that is positioned at both sides, have darker bottom 5 between the space 3 in two, and the top in interior space 3 has the protuberance 10 towards the below; This two interior space 3 is for making up a conducting terminal 7 respectively, the fixed contact 9 of protrusion can being set above the rear end of described conducting terminal 7.Supply on the bottom 5 to place first spring 11, again in first spring, 11 upper ends, one bracing or strutting arrangement; The better embodiment of described bracing or strutting arrangement can comprise a cylinder 13 and a setting element 21 that is formed with class; The hole 17 of an alloy piece 15 is passed in the upper end of this cylinder 13; Described hole 17 is located at the central authorities of alloy piece 15, and hole 17 both sides of alloy piece 15 central authorities are formed with breakover point 151, when up or during down crooked alloy piece 15, can make alloy piece 15 down warpage and location, or up warpage and location; The below at alloy piece 15 two ends then is provided with 15 movable contacts 19 of protrusion; Alloy piece 15 is shaped to arc shape, and makes up with cylinder 13 under the bowed state that alloy piece 15 arches upward toward above.Cylinder 13 upper ends that pass hole 17 then put described setting element 21, and this setting element 21 can be a kind of shape of cap, or other any possible body, and the upper end of setting element 21 is then placed one second spring 23 again.The top, outside of body 1 is provided with a press device 25, and this press device 25 includes a pedestal 253, a button 252 and a movable axis 251; Pedestal 253 has a centre bore, and the internal face ring week of this centre bore is distributed with guide groove 2531 equidistantly.The lower end of button 252 is a hollow and can hold movable axis 251 and insert, and the lower end periphery of button 252 is formed with a plurality of V-arrangement teats, and the external diameter surface in its lower end is distributed with plural projection 2521; After button 252 is combined in the centre bore of pedestal 253, make those projections 2521 slip into those guide grooves 2531.The external diameter sidewall of described movable axis is provided with plural guide pillar 2511, the upper end of each guide pillar 2511 forms the inclined-plane, after movable axis 251 is combined in the shrinkage pool of button 252 lower ends, the inclined-plane of these guide pillar 2511 upper ends contacts V-arrangement recess one side in button 252 lower ends accordingly, makes the lower end of movable axis 251 and the last end in contact of second spring 23 simultaneously.

Structure by described press device 25, when toward below pressing button 252, projection 2521 is to slide along guide groove 2531, button 252 promotion movable axis 251 move down to compress second spring 23 simultaneously, the upper end of guide pillar 2511 was left the V-arrangement recess of button 252 and is displaced to button 252 bottom this moment, behind the button 252 to be placed, then promoted to move on the movable axis 251 by the elastic force of second spring 23 and make guide pillar 2511 utilize the inclined-plane of its upper end and be directed into another adjacent V-arrangement recess, the projection 2521 of button 252 also up moves and homing along guide groove 2531 simultaneously.Though the application has done detailed explanation to described press device 25, described press device 25 still belongs to known technology, is not the desired emphasis of the application.

Using method of the present utility model is (consulting shown in Figure 4) when button 252 is depressed, and first spring 11 is compressed, and then makes two movable contacts 19 of alloy piece 15 be contacted with the fixed contact 9 of two conducting terminals 7 simultaneously to form current path; Then alloy piece 15 is boosted toward tops during pressing button again by first spring 11, and button 252 by 23 ejections of second spring homing.When electric current makes the temperature of alloy piece 15 raise above load, then alloy piece 15 will produce distortion, and be that the center produces warpage with its breakover point 151, allow and originally be the alloy piece that arches upward toward the top and change into toward the below and arch upward (as shown in Figure 5), and then make the movable contact 19 at alloy piece 15 two ends separate with the fixed contact 9 of conducting terminal 7 and form current interruption, so can guarantee the Electrical Safety of switch.At this moment, push this press device 25 once more and when making alloy piece 15 up mobile, then make alloy piece 15 touch described protuberance 10, and then force alloy piece 15 to reply again toward the stand-by state of top warpage, the user is again during pressing button, just can allow alloy piece 15 conducting electric current again.

Aforementioned structure of the present utility model, because as long as a switch gets final product determine switch at path or off state, and when current overload, cut off the power supply automatically; Owing to structure process of the present utility model is simplified, the whole more traditional person of spare part more reduces, and is minimized manufacturing cost again, and the interlock stroke between the structure also comparatively shortens, and has more reduced the failure rate of switch.

The above is preferred embodiment of the present utility model only, is not in order to the utility model being done any pro forma restriction, and all relevant impartial modifications of being done according to the utility model claim or change are all the utility model claim and contain.

Claims

1. safety switch, be in a body, to be provided with several conducting terminals and a conducting strip, this body is provided with a press device, be provided with second spring between described press device and the conducting strip, be provided with first spring between described conducting strip and the body, control this conducting strip and contact simultaneously or do not contact by operating this press device, it is characterized in that with this conducting terminal:

Described alloy piece is an alloy piece, and this alloy piece has the function of break-in warpage;

Described alloy piece is subjected to this press device and controls and upper and lower moving, and when alloy piece is mobile toward the top, is touched body interior, thereby makes alloy piece keep swelling and the state of warpage toward the top.

2. safety switch according to claim 1, it is characterized in that described alloy piece is incorporated into a bracing or strutting arrangement, described second spring is set between this bracing or strutting arrangement and this press device, described first spring is set between this bracing or strutting arrangement and the body, and this bracing or strutting arrangement and alloy piece are to be subjected to described press device control and upper and lower moving.

3. safety switch according to claim 2, it is characterized in that described bracing or strutting arrangement includes a cylinder and a setting element, described alloy piece is provided with a hole, this cylinder is the hole that passes alloy piece from lower to upper, and described first spring is set between this cylinder and described body, this setting element then is combined in this cylinder end, and described second spring is set between setting element and described press device.