CN2314469Y

CN2314469Y - Button switch with overload cut-off structure

Info

Publication number: CN2314469Y
Application number: CN 97234876
Authority: CN
Inventors: 尹天民
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-23
Filing date: 1997-06-23
Publication date: 1999-04-14
Anticipated expiration: 2007-06-23

Abstract

The utility model relates to a button-typed switch with an overload power-off structure, mainly comprising a switch box body, a button, a front cover, a base, a supporting rod, an electric contact piece, and an overload power-off structure, wherein, the bottom of the button is provided with the supporting rod; one electric contact piece which can be sheathed in the supporting rod moves downwards when the button is pressed, so as to conduct current. The overload power-down structure is provided with an axle seat which is provided with a suspension arm L-shaped elastic braking rod. A convex rod which is additionally provided with a power-off piece is arranged on the suspension arm L-shaped elastic braking rod. The lower end of the contact face of the power-down piece and the suspension arm L-shaped elastic braking rod of the axle seat is provided with a groove. When current overloads, deformation of a bimetallic sheet can act on the suspension arm L-shaped elastic braking rod of the axle seat. The convex rod on the suspension arm L-shaped elastic braking rod disengages from the limitation of the groove and causes the power-off piece to move upwards together with restoring force of a button presetting elastic piece, forming a power-off condition.

Description

Push-button switch with overload cut-off structure

The utility model is a kind of push-button switch with overload cut-off structure, be meant a kind of design especially by the overload cut-off structure, when current overload, the outage part is promptly discharged the restriction of button, make it constitute and open circuit, safe, simple and easy, and cost-effective push-button switch by top on default elastic restoring force itself.

Push-button switch in the prior art, it has the effect of convenient and simple structure in use, yet, when current overload, it often can only be by the blowing in order to outage of fuse, if the setting of no safety element, then usually thereby cause the damage of power equipment or electrical equipment; Need to change in addition fuse simultaneously, and continue to use, not only cost is higher, and loses time.

In view of common push-button switch still has above-mentioned shortcoming, the inventor improves at those shortcomings, forms the utility model.

The purpose of this utility model is to provide a kind of push-button switch with overload cut-off structure, when current overload, the L type brake bar of the deformation pushing and pressing axle bed of bimetal leaf, nose bar on the brake bar then breaks away from the braking to the concave part on the outage part, and this outage part can push away on bullet, electric current is cut off the power supply because of top on the button, and this is the main purpose of this invention.

The utility model mainly is to cross the electric structure of blocking by a switch box body, a button, a protecgulum, a pedestal, a pole, an electric contact point and to be constituted; Wherein, aforementioned button bottom is to be equiped with a pole, and an electric contact point then can be placed in the pole, by pushing of button electric contact point is moved down, and constitutes path; Aforesaid overload cut-off structure then is provided with an axle bed, this axle bed is provided with a cantilevered L type brake bar, on the brake bar and be provided with a nose bar, it is established elsewhere has an outage part, the lower end of this outage part and axle bed brake bar contact-making surface then offers the multiple stage type concave part, the bimetal leaf that when current overload, is caused open variable can one in the axle bed brake bar, at this moment, nose bar breaks away from the control to concave part on the brake bar, move on the default bounce of button and allow the outage part be leaned on, and the structure of formation off-position.

As for detailed construction of the present utility model, application principle, effect and effect, then be further described as follows with reference to following accompanying drawing:

Fig. 1 is the three-dimensional exploded view of the utility model one preferred embodiment;

Fig. 2 is the combination section of the utility model once preferable enforcement;

Fig. 3 is the front view of cutting electric part itself and axle bed contact-making surface in the overload cut-off structure of the present utility model;

Fig. 4 is the cut off the power supply concave part each point position height schematic diagram of part of this Fig. 3;

See also Fig. 1 and Fig. 2 and be shown in the three-dimensional exploded view and combination section thereof of the utility model one preferred embodiment, by this two figure as can be seen, the utility model mainly is made up of: button 1, switch box body 2, protecgulum 3, pedestal 4, pole 5, electric contact point 6 and an overload cut-off structure 7; Wherein, button 1 is to be installed in people's box body 2 upper ends, and its bottom appropriate location also is provided with a casing pressure axial region 11, and protecgulum 3 then is installed in switch box body 2 front portions, and switch box body 2 dual-sides also can be provided with corresponding clamping piece 21; Pedestal 4 is installed in switch box body 2 bottoms, and on the pedestal 4 and be provided with a holding part 41, therebetween and offer the caulking groove 42,43,44 that can embed the conducting strip 74,45 and second conductive plate 46 respectively, and aforementioned second conductive plate 46 is to be provided with second contact 461; Pole 5 upper ends are provided with a bar portion 51, and be resisted against casing pressure axial region 11 lower ends of button 1 with it, pole 5 lower ends then are a hollow bulb, it also can be sleeved in the holding part 41 downwards, 52 of another back-moving springs axially are arranged in 41 of pole 5 hollow bulbs and holding parts, in order to the restoring force after button 1 presses down to be provided; Electric contact point 6, which is provided with a trepanning 63, both sides are respectively equipped with electric contact 61,62, it is to be sheathed on bar portion 51 and to be arranged in casing pressure axial region 11 lower ends of button 1 and 5 of poles, when pressing button 1, electric contact point 6 promptly moves down, contacts with first, second contact 731,461 on first, second conductive plate 73,46 by its electric contact 61,62, and the conducting electric current; 7 of cut-off structures of overload include axle bed 71, cut electric part 72, first conductive plate 73, conducting strip 74, bimetal leaf 75, and lead 76, first conductive plate 73 also is provided with first contact 731, bimetal leaf 75 then can directly directly close on its side in modes such as riveted or bar close admittedly, again bimetal leaf 75 in addition end then can be a free end and contact with conducting strip 74, it also is connected with a lead 76 and the conducting strip 74 that is embedded at pedestal 4 in addition, with prevention bimetal leaf 75 after producing deformation if fail to return back to original position when contacting with conducting strip 74, can be still with lead 76 formation paths; Then be provided with a cantilevered L type brake bar 711 in the middle of the axle bed 71, the appropriate position is provided with a nose bar 712 on the brake bar 711, outage part 72 offers a gap slot 721 with the lower end of the contact-making surface of axle bed 71 brake bars 711, when off-position with ccontaining nose bar 712, jagged again groove 721 tops then are provided with multistage concave part 722, when button 1 presses down, above-mentioned nose bar 712 can follow into this concave part 722, and be subjected to it to do temporary blocking, maintenance in order to conduction state, and on button 1, do two when pushing, follow the path again and be moved to gap slot 721, make button 1 can on move to and form outage between above-mentioned each contact; In addition when above-mentioned nose bar 712 is subject in the concave part 722, bimetal leaf 75 as overload are heated generation deformation and are acted on brake bar 711, make that brake bar 711 outwards is offset, the nose bar 712 of its top also outwards breaks away from the card limit to concave part 722 gradually, the part 72 that cuts off the power supply this moment is to be able to that bullet moves by the upwards restoring force that acts on button 1, the electric contact point 6 that pole 5 drives also with on move and constitute the state of outage.

See also Fig. 3 and Fig. 4 and be the utility model overload cut-off structure 7 outage part 72 its with the front view of axle bed 71 contact-making surfaces, and concave part 722 each district position height schematic diagrames shown in, wherein the A district is form and the height and position for gap slot 721, and B, C, D, E, F respectively distinguish represented, be the design of the shaped position height in the concave part 722, in the time of in nose bar 712 is conflicted it, can move along the order in each district of A-B-C-D-E-F-A, allow outage part 72 according to the elastic force displacement of button 1 itself constitute outage or under push away to revert back to initial state.

From the above mentioned as can be known, the push-button switch with overload cut-off structure of the present utility model is by combining of overload cut-off structure its axle bed and the part that cuts off the power supply, and with button overall co-ordination, make its more safety with cost falls, by such improvement, reached goal of the invention of the present utility model.

Claims

One kind have the overload cut-off structure push-button switch, it is mainly by button (1), switch box body (2), protecgulum (3), pedestal (4), pole (5), electric contact point (6) and mistake live structure (7) are formed, it is characterized in that: button (1) is to be installed in its bottom appropriate location of people's box body (2) upper end to be provided with a casing pressure axial region (11), protecgulum (3) then is located at people's box body (2) front portion, switch box body (2) two avris are provided with corresponding clamping piece (21), and pedestal (4) is in people's box body (2) bottom, and be provided with holding part (41), and embedding conducting strip (74,45) with the caulking groove (42 of second conductive plate (46), 43,44), and conductive plate (46) is provided with second contact (461), pole (5) upper end is provided with a bar portion (51), and replace casing pressure axial region (11) lower end at button (1), pole (5) lower end then is a hollow bulb, can be sleeved on downwards in the holding part (41), another back-moving spring (52) then axially is set between pole (5) hollow bulb and holding part (41), electric contact point (6), which is provided with a trepanning (63), two sides have electric contact (61 respectively, 62), be to be set in bar portion (51), cut off the power supply (7) are then by axle bed (71), outage part (72), conductive plate (73), conducting strip (74) bimetal leaf (75) is formed by connecting.
2. the push button with overload cut-off structure as claimed in claim 1, it is characterized in that: axle bed (71) central authorities establish sky, and the suitable distance of upper position with this brake bar (711) of a cantilever type L type brake bar (711) is provided with a nose bar (712), a tongue portion (722) is located to be provided with in cut off the power supply again corresponding protruding (712) of part (72), when moving up and down, nose bar (712) is able to move and do temporary blocking at above-mentioned concave part (722) at outage part (72).
3. the push-button switch with overload cut-off structure as claimed in claim 1, it is characterized in that: aforementioned pole (5) lower end is to be a hollow bulb, and can be sleeved on downwards in the holding part (41) of aforementioned pedestal (4), and a back-moving spring (52) then axially is arranged between aforementioned pole (5) hollow bulb and pedestal (4) holding part.
4. the push button with overload cut-off structure as claimed in claim 1, it is characterized in that: aforementioned switches box body (2) dual-side is to be provided with corresponding clamping piece (21).