CN2314471Y - Safety switch with composite upward device - Google Patents

Abstract

The utility model relates to a composite rocker safety switch. A relay terminal seat is arranged between two terminal pins of an ordinary switch, and the two terminal pins are connected with a power cord; a bimetallic sheet and a conductive sheet on the relay terminal seat are connected with the two terminal pins of the switch; a rocker which is controlled by a switch key to link is bridged above the conductive sheet. The bimetallic sheet is heated to be bent in an overload state to push the rocker, so that the conductive sheet forms an open circuit with the terminal pins of a power switch, and the switch key is restored to an original (on) position to prevent overlarge current.

Description

Combined type seesaw safety switch

The utility model is a kind of combined type seesaw safety switch that overload protection function is arranged; be meant that especially a kind of bimetal leaf that is provided with sticks up device with relevant pendulum in mains switch; utilize the auto-cutout when the electric current of flowing through is excessive of this bimetal leaf also to drive pendulum and stick up device work; make power circuit keep interrupting; with electrical equipment in the protection use, safeguard Electrical Safety.

Along with the progress and industrial and commercial flourishing result of science and technology, various electrification products are constantly weeded out the old and bring forth the new, to improve people's life, yet the use of these various electrical equipment all need utilize electric power competence exertion function, therefore, electric power has critical role in the modern life; Yet along with electricity usage is more prevalent, the improper unexpected storms that causes of electricity consumption is also day by day frequent.Therefore, how improving Electrical Safety, is one of important topic of modern.

The general at present normal Electrical Safety safeguard measure that adopts; promptly on the main line of each electricity consumption, install the device of a restriction electric current, as: fuse or circuit breaker, can cut off electric current when electric current is excessive; but because fuse must be changed after blowing at every turn; very inconvenience in the use, so be eliminated gradually, circuit breaker is then because complicated on the structure; and price is expensive; therefore if on every circuit, use, then use to be unfavorable for economic benefit, and also have any problem on implementing.Therefore, general circuit breaker all is to make bigger current specification, and can make the less line sharing of several electric currents one circuit breaker, and to save the facility of cost and construction, the sensitivity of this circuit breaker then also can't be satisfied the demand of various electric appliance circuits unavoidably.

And relevant for the taking of electric power, any electrical equipment all must possess power switch device, makes electrical work with the conducting of direct Control current.So, if can be in general mains switch additional other structure and make it have the overload cut out protection concurrently, then it not only has fail safe, more can save the space and reduces cost, this is the idea of the utility model generation.

The utility model purpose aims to provide a kind of combined type seesaw safety switch, it is established a bimetal leaf and is connected with a conducting strip between two end pin of general switch linking power line, this conducting strip top is striden and is established a pendulum seesaw that is subjected to switch key control interlock, utilize this bimetal leaf when overload, to be heated and produce bending, put seesaw with the elastic force pushing and pressing of a flexure strip simultaneously, make between this conducting strip and mains switch that forming opens circuit and put seesaw then can make conducting strip remain on off state and make switch key reply position in " pass ", prevent that to reach super-high-current from causing electrical equipment, electric wire burns or unexpected storms takes place, and this is a purpose of this utility model.

This kind of the utility model combined type seesaw safety switch, it is when the overload trip state, if still make the pendulum seesaw when remaining on the position of " opening " by force, because the effect of bimetal leaf and pendulum seesaw and still can maintain off state, to guarantee to make the safety of electrical appliance.

Below just in conjunction with the accompanying drawings, to detailed construction of the present utility model, application principle is described further

Fig. 1 is the utility model perspective view;

Fig. 2 is that the utility model is at general off state structure cut-away view;

Fig. 3 is the structure cut-away view of the utility model in conducting state;

Fig. 4 is the utility model bimetal leaf and pendulum seesaw action schematic diagram when overload;

Fig. 5 is the utility model conducting strip and pendulum seesaw action schematic diagram when overload;

Fig. 6 is the perspective view of another preferred embodiment of the utility model;

Fig. 1 is a perspective view of the present utility model, and can clearly be found out by this figure: the utility model mainly comprises: housing 1, bimetal leaf 2, conducting strip 3 and pendulum seesaw 4 etc. are partly; Its both sides, middle shell 1 bottom side are respectively equipped with the current enter pin 11 that is connected with lead, current output terminal pin 12, this advances current output terminal pin 11,12 top sides are respectively equipped with fixed contact 111,121, and advance, current output terminal pin 11,12 and be provided with a relay seat 13, housing 1 inherent these relay seat 13 top sides are provided with a projection 15, housing 1 top side is provided with a seesaw 14 in button, an interlock extension 141 is extended in these seesaw 14 stage casings downward vertically, linkage part 141 bottoms then pull and support with a seesaw extension spring 142, make seesaw 14 stressed maintenance deflections, bimetal leaf 2 is to be fixed on the relay seat 13 and to current enter pin 11 tops with an end to extend, these bimetal leaf 2 tops then are provided with delegation's moving contact 21 and can contact with the fixed contact 111 of current enter pin 11, armature contact 21 sides are connected the inwall side that is positioned at housing 1 with a flexure strip 22, conducting surface 3 is to be an angle with a bullet fin 31 tiltedly to be located at relay seat 13 tops below the stage casing, it extends between projection 15 and current output terminal pin 12 tops on one side, and contact conducting with fixed contact 121 with an armature contact 32, the other end of conducting strip 3 is then reverse to be extended to bimetal leaf 2 tops and forms a hook portion 33, the then upwards vertical curved mutual conductance sheet 34 of establishing in the top, stage casing of conducting strip 3, in this mutual conductance sheet 34 and establish a hollow-out parts 341, pendulum seesaw 4 is to be an arc-shaped bend, it is provided with to collude on one side strides depressed part 42, can stretch into the hollow-out parts 341 of mutual conductance sheet 34 and collude across its base and to stride depression 42 sides are connected seesaw 14 with a trace 41 interlock extension 141 bottoms, these trace 41 sheathed torsionsprings 411 make maintenance one push the power of mutual conductance sheet 34 to, draw support with mutual conductance sheet 34 with the hook of this trace 41, can make the pendulum seesaw 4 outstanding spaces that are arranged on projection 15 tops form balance, the end in addition of pendulum seesaw 4 then extends near the formation one in armature contact 21 tops of bimetal leaf 2 and extends ejection end 43, housing 1 is at current enter pin 11,12 on current output terminal pin is convexly equipped with a pilot lamp power terminal 5 in addition, can connect the demonstration of an indicator light as on off state.

Fig. 2 is that the utility model is at general off state structure cut-away view, by diagram as can be known: when seesaw 14 during in the position of " pass ", be positioned at side outside pendulum seesaw 4 and trace 41 junctions behind the bottom of its interlock extension 141, this moment, trace 41 did not have any application of force to pendulum seesaw 4, so though bimetal leaf 2 is subjected to the effect of shell fragment 22 and make armature contact 21 contact conducting with the fixed contact 111 of current enter pin 11, but conducting strip 3 is played the effect of fin 31 and armature contact 32 is upwarped, and forms the off state that separates with the fixed contact 121 of current output terminal pin 12.

Fig. 3, Fig. 4, Fig. 5 is that the utility model states clearly bimetal leaf at the structure cut-away view of conducting state with mistake, conducting strip action schematic diagram, by diagram as can be known: when seesaw 14 when being pressed in the position of " opening ", the approaching pendulum of interlock extension 141 rotations seesaw 4, trace 41 is subjected to pushing to pendulum seesaw 4 application of forces of interlock extension 141, but because pendulum seesaw 4 is to stride that depressed part 42 hooks are held in mutual conductance sheet 34 and can't slippage with hook, so trace 41 can be pressed mutual conductance sheet 34 with 34 parallel being directed downwards of mutual conductance sheet, these mutual conductance sheet 34 pressurizeds then drive conducting strip 3 and play fin 32 bendings, armature contact 32 is descended to be contacted with fixed contact 121, at this moment, advance, current output terminal pin 11,12 via bimetal leaf 2, relay seat 13, play fin 31 and conducting strip 3 formation one loops (as shown in Figure 3); And when circuit has the situation of overload to produce; bimetal leaf 2 can make bullet disengaging fixed contact 111 (as shown in Figure 4) on the armature contact 21 because of overheated generation is crooked; advance; go out circuit end pin 11; 12 formation are immediately opened circuit to protect this electricity consumption facility; and the extension ejection end 43 of bimetal leaf 2 ejections of bending pendulum seesaw 4; making pendulum seesaw 4 stride the position that depressed part 42 contacts with mutual conductance sheet 34 with hook is that the axle center turns clockwise; this moment trace 41 with put seesaw 4 and one of be connected also slippage laterally of end; the pressure of 41 pairs of pendulum of trace seesaw 4 is removed; seesaw 14 is subjected to pulling and supporting of seesaw extension spring 142 and returns back to the position of " pass "; and conducting strip 3 plays the elastic force effect of fin 31 and makes armature contact 32 break away from the fixed contact 121 of current output terminal pin 12; the sheet of mutual conductance simultaneously 34 is upwards replaced pendulum seesaw 4 (as shown in Figure 5); when bimetal leaf 2 coolings; the hook portion 33 of conducting strip 3 presses down bimetal leaf 2; armature contact 21 is contacted with fixed contact 111; this pendulum seesaw 4 also can return back to the former initial position that opens circuit with returning spring 6 simultaneously; at this moment, overall structure returns back to again as the off state that begins at the beginning of Fig. 2.

Fig. 6 is the perspective view of another preferred embodiment of the utility model, by diagram as can be known: the hook of pendulum seesaw 4 is striden depressed part 42 bottom sides and is replaced on conducting strip 3 with a returning spring 6, elastic force by this returning spring 6 can make the hook of pendulum seesaw 4 stride depressed part 42 maintenances one power that raises up, to strengthen the state that supports of trace 41.

When electricity consumption is passed by on one's way at normal operating condition and when desiring to stop, it only needs seesaw 14 is pressed into the position of " pass ", this moment, interlock extension 141 drive traces 41 were to 4 outside slippages of pendulum seesaw, the pressure of 41 pairs of pendulum of trace seesaw 4 is removed, also can be made overall structure return back to the initial position of " pass " according to above-mentioned steps; And, can guarantee the safe in utilization of electrical equipment with this if overall structure when overload trip, if still when making seesaw 14 remain in the pressing position of " opening " by force, is stuck up 4 effect and still can be made bulk loop be maintained at off state by bimetal leaf 2 and pendulum.

From the above mentioned as can be known, combined type seesaw safety switch of the present utility model have really the heavy current of preventing flow through the electricity consumption loop, guarantee the effect of Electrical Safety.

Claims (3)

1. combined type seesaw safety switch is characterized in that: it is provided with a housing (1) a relay seat (13) and is provided with a seesaw (14) in the outside in addition and stretches in the housing (1) with an interlock extension (141) between the two end pin that are connected with power lead; One bimetal leaf (2), an end are installed on the aforementioned relay seat (13), and the other end then extends to housing (1) to end pin top, and is positioned in the housing (1) with a flexure strip (22) linking; One conducting strip (3), the stage casing is an angle with a bullet fin (31) and tiltedly is located at relay seat (13) top, one side of conducting strip (3) extends to housing (1) one end pin top, can form with this end pin and contact, the then upwards vertical curved mutual conductance sheet (34) of establishing in top, the stage casing of conducting strip (3) is in this mutual conductance sheet (34) and establish a hollow-out parts (341); One pendulum seesaw (4), be an arc-shaped bend, it is provided with one on one side and colludes and stride depressed part (42), can stretch into the hollow-out parts (341) of aforementioned mutual conductance sheet (34), and across its base, collude and stride depressed part (42) side is attached to aforementioned seesaw with a trace (41) interlock extension (141) bottom, this colludes strides depressed part (42) bottom side and is against aforementioned conducting strip (3) with a returning spring (6), and other end of pendulum seesaw (4) then extends near the extension ejection end that forms in top, extension end of bimetal leaf (2); Draw with mutual conductance sheet (34) by the hook of this trace (41) and to support, can make pendulum seesaw (4) establish the position and form a balance outstanding, and pushing seesaw (14) or when bimetal leaf (2) is crossed thermal flexure, can put seesaw (4) rotating band moving conductive sheet (3) and form connection or off state.

2. combined type seesaw safety switch as claimed in claim 1 is characterized in that: the two end pin top sides that its middle shell (1) is connected with power lead respectively are provided with a fixed contact, go out, the current enter pin then is being provided with armature contact with the relative contact position of this end pin.

3. combined type seesaw safety switch as claimed in claim 1 is characterized in that: wherein the interlock extension (141) of seesaw bottom is pulled and supported by a flexible member in addition and makes maintenance one active force to the off-position.

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