CN2314469Y - Push-button switch with overload cut-off structure - Google Patents

Abstract

The utility model relates to a button switch with overload power-off structure, which mainly comprises a switch box body, a button, a front cover, a base, a support rod, an electric contact piece and an overload power-off structure; wherein the bottom of the button is provided with a support rod, and an electric contact piece can be sleeved in the support rod, when the button is pressed, the electric contact moves downwards to conduct current, the overload power-off structure is provided with a shaft seat, the shaft seat is provided with a cantilever L-shaped elastic brake rod, the rod is provided with a convex rod, and the rod is additionally provided with a power-off element, the lower end of the contact surface of the power-off element and the elastic brake rod of the shaft seat is provided with a groove, when the current is overloaded, the deformation of the bimetallic strip can act on the elastic brake rod of the shaft seat, the convex rod on the elastic brake rod is separated from the limitation on the groove, and the power-off part can move upwards along with the restoring force of the preset elastic part of the button to form a power-off state.

Description

Push-button switch with overload cut-off structure

The utility model relates to a push-button switch with an overload power-off structure, in particular to a design with an overload power-off structure. The set elastic recovery force tops up to form an open circuit, a safe, simple, and cost-saving push-button switch.

The push-button switch in the prior art has the effect of convenience and simple structure in use, but when the current is overloaded, it often can only be used to cut off the power by blowing the fuse. If there is no setting of the insurance element, then This often results in damage to power supply equipment or electrical appliances; at the same time, it is necessary to replace the fuse in addition and continue to use it, which not only costs more, but also wastes time.

In view of the above-mentioned shortcomings of common push-button switches, the inventor made improvements to these shortcomings and formed the utility model.

The purpose of this utility model is to provide a push-button switch with an overload power-off structure. When the current is overloaded, the deformation of the bimetal sheet pushes against the L-shaped brake lever of the shaft seat, and the protruding rod on the brake lever is disengaged. The main purpose of this invention is the braking of the groove portion on the power-off piece, and the power-off piece can be pushed up by itself, so that the current is cut off due to the top of the button.

The utility model is mainly composed of a switch box body, a button, a front cover, a base, a rod, an electric contact piece, and an overcut electric structure; wherein, the bottom of the aforementioned button is equipped with a A support rod, and an electric contact piece can be placed in the support rod, and the electric contact piece is moved down by pressing the button to form a passage; the aforementioned overload power-off structure is provided with a shaft seat, and the shaft seat is provided with a cantilever The L-shaped brake lever has a protruding lever on the brake lever and a power-off part on the other part. The lower end of the power-off part and the contact surface of the shaft seat brake rod is provided with a multi-step groove. In the part, when the current is overloaded, the opening of the bimetal sheet can be equal to the brake lever of the axle seat. At this time, the convex lever on the brake lever is out of the control of the groove, so that the power-off part can be pre-set by the button. The rebound force set up moves up to form a power-off state structure.

As for the detailed structure, application principle, function and effect of the present utility model, it is further described as follows with reference to the following accompanying drawings:

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

Fig. 2 is a combined sectional view of a preferred implementation of the present utility model;

Fig. 3 is a front view of the contact surface between the cut-off part and the shaft seat in the overload power-off structure of the present invention;

Fig. 4 is a schematic diagram of the height of each point of the groove part of the power-off part in Fig. 3;

Please refer to Fig. 1 and Fig. 2, which are the three-dimensional exploded view of a preferred embodiment of the present invention and its combined section view, as can be seen from the two figures, the present invention is mainly composed of: button 1, switch box body 2 , front cover 3, base 4, pole 5, electric contact piece 6, and an overload power-off structure 7; wherein, the button 1 is installed on the upper end of the human box body 2, and a set of The finale portion 11, and the front cover 3 is mounted on the front part of the switch box body 2, and the two sides of the switch box body 2 can be provided with corresponding latches 21; the base 4 is mounted on the bottom of the switch box body 2, The base 4 is also provided with an accommodating portion 41, and there are slots 42, 43, 44 for inserting the conductive sheets 74, 45 and the second conductive plate 46 respectively, and the aforementioned second conductive plate 46 is provided with the first Two contacts 461; the upper end of the strut 5 is provided with a rod portion 51, and it is pressed against the lower end of the sleeve pressing shaft portion 11 of the button 1, and the lower end of the strut 5 is a hollow portion, which can be fitted downward into the accommodating In the part 41, another return spring 52 is arranged axially between the hollow part of the pole 5 and the accommodating part 41 to provide the restoring force after the button 1 is pressed down; the electric contact piece 6 is provided with a set of holes 63, the two sides are respectively provided with electrical contacts 61, 62, which are sleeved on the rod portion 51, and placed between the lower end of the pressing shaft portion 11 of the button 1 and the pole 5, when the button 1 is pressed, the electric contact piece 6 moves down, and its electrical contacts 61, 62 are in contact with the first and second contacts 731, 461 on the first and second conductive plates 73, 46 to conduct current; the overload power-off structure 7 then Including shaft seat 71, power cutting part 72, first conductive plate 73, conductive sheet 74, bimetallic sheet 75, and wire 76, first conductive sheet 73 is also provided with first contact 731, and bimetallic sheet 75 then It can be directly fixed on its side by riveting or rod jointing, and the other end of the bimetallic sheet 75 can be in contact with the conductive sheet 74 as a free end, and it is embedded in the base with a wire 76 4 of the conductive sheet 74 is connected to prevent the bimetallic sheet 75 from returning to its original position and contacting the conductive sheet 74 after deformation, it can still form a path with the wire 76; and the middle of the shaft seat 71 is provided with a cantilever L-shaped brake lever 711, a protruding lever 712 is provided at an appropriate position on the brake lever 711, and a notch groove 721 is provided at the lower end of the contact surface between the power-off piece 72 and the shaft seat 71 brake lever 711. To accommodate the protruding rod 712, there is a multi-level groove part 722 above the notch groove 721. When the button 1 is pressed down, the above-mentioned protruding rod 712 can walk into the groove part 722 and be temporarily locked by it. control, in order to maintain the conductive state, and when the button 1 is pressed twice, it will move out to the notch groove 721 along the path, so that the button 1 can be moved up to the above-mentioned contacts to form a power-off; in addition, when the above-mentioned protruding rod 712 When confined in the groove portion 722, the bimetallic strip 75 will deform and act on the brake lever 711 if it is overloaded and heated, causing the brake lever 711 to shift outwards, and the protruding lever 712 above it will gradually move outwards and break away from the pair. When the groove portion 722 is locked, the power-off member 72 can be moved by the upward restoring force acting on the button 1, and the electric contact piece 6 driven by the pole 5 also moves up accordingly to form a power-off state.

Please refer to Fig. 3 and Fig. 4, which are the front view of the contact surface of the power-off part 72 of the overload power-off structure 7 of the present invention and the contact surface of the shaft seat 71, and the schematic diagrams showing the height of each area of the groove part 722, wherein the A area is for The shape and height position of the notch groove 721, and the representations of B, C, D, E, and F areas are the design of the shape position height in the groove portion 722. When the protruding rod 712 is in contact with it, it can move along the A-B-C-D-E-F-A areas. The order of movement, so that the power-off member 72 according to the displacement of the elastic force of the button 1 itself constitutes a power-off or push down to return to the initial state.

It can be seen from the above that the push-button switch with overload power-off structure of the present utility model is combined with the overload power-off structure, its shaft seat and power-off parts, and cooperates with the button as a whole, making it safer and less costly. , by such improvement, reached the purpose of the invention of the utility model.

Claims (4)

1. 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. 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. 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. 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).

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