CN201532881U

CN201532881U - Micro-switch with improved structure

Info

Publication number: CN201532881U
Application number: CN2009201948364U
Authority: CN
Inventors: 陈军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-16
Filing date: 2009-09-16
Publication date: 2010-07-21
Anticipated expiration: 2019-09-16

Abstract

The utility model relates to a micro-switch with an improved structure, which comprises a shell body, an upper cover, a press-button, an offsetting spring, a spring plate, a public contact terminal, a normally open contact terminal and a normally closed contact terminal, wherein the tail portion of the public contact terminal is provided with two pairs of vicarious grooves, the middle portion of the spring plate is clamp-connected in the groove of the public contact terminal, the press-button is matched with the upper surface of the end of the spring plate to contact, the offsetting spring is matched with the lower surface of the end of the spring plate to contact, the press-button, the tail portion of the spring plate and the offsetting spring preserve linking-up match, the front end of the spring plate is upwardly bent, and the spring plate is arranged between the normally open contact terminal and the normally closed contact terminal after riveting movable contacts. The micro-switch with the improved structure has the advantages of entire simple structure, reliable resetting of press-buttons, rapid movements of switch-off and connection and strong break-make large current capability.

Description

A kind of sensitive switch that improves structure

Technical field

The utility model relates to control switch, and especially a kind of household electrical appliance that are applicable to are by the actuator operation, perhaps by the sensitive switch that excites driving member to start, control.

Background technology

Present existing household electrical appliance as roaster, microwave oven, for user's personal safety, generally all have been provided with the sensitive switch of position-limiting action.When the user shut the door of roaster or microwave oven, door can be pushed the button of sensitive switch, behind the internal wiring of the closed electrical equipment of sensitive switch, and the closed again mains switch of user, electrical equipment just can operate as normal.When the door of roaster or microwave oven does not shut, when the user did not find the mains switch of the closed electrical equipment of this situation, because the internal wiring of the not closed electrical equipment of sensitive switch, electrical equipment can't be started working, thereby avoids having an accident.When electrical equipment in running order, user's misoperation, under the situation that does not disconnect appliance mains switch, directly open the door of roaster or microwave oven, in the moment that door is opened, door loses pushing sensitive switch, microswitch push-button resets, and disconnects the internal wiring of electrical equipment, cuts off the power supply of electrical equipment, electrical equipment quits work, and guarantees user's personal safety.

Traditional sensitive switch is of a great variety, as Chinese patent application 200810163021.X, the patent application that name is called " sensitive switch " discloses a kind of sensitive switch, as shown in Figure 1, it two crooked 4 with contact bridge sheet 5 between and contact for line between two bendings 4 and three bendings 7, the contact area of each hinged point changes not quite in the course of action of switch, and the electric current that flows through is comparatively constant, yet but has following defective:

1. the parts of function translation activity mechanism are more, and complexity during installation fee is artificial, material cost is higher;

2. the hinged point of function translation activity mechanism is more, and the motion of mechanism complexity need experience a plurality of driving members by button 3 actions to the switching between the contact, and the change action of switch is not rapid, and is not direct;

3. the function of switch is unreliable, the breakaway between the contact of this switch and the reset force of button are all provided by reed 6, during long-time bearing great current, the parts temperature of switch inside is higher, reed 6 is in pressured state in the environment of high temperature, the distortion of losing efficacy takes place easily, and to after the pushing of button 3, reed 6 can't provide enough elastic force to drive function translation activity mechanism and realize the switching of switch in cancellation.

The utility model content

At the deficiency of above existing sensitive switch, the purpose of this utility model provides that a kind of overall structure is simple, and push-button reset is reliable, disconnects, ON Action is rapid, the sensitive switch of the improvement structure that the big current capacity of break-make is strong.

The purpose of this utility model is achieved by the following technical solution:

A kind of sensitive switch that improves structure, comprise housing, loam cake, button, back-moving spring, shell fragment, public contact terminal, often open contact terminal, normally closed contact terminal, public contact terminal is provided with groove, described shell fragment middle part is connected in the groove of public contact terminal, button contacts with the terminal upper surface cooperation of shell fragment, back-moving spring contacts with the terminal lower surface cooperation of shell fragment, button, the afterbody of shell fragment, the back-moving spring three keeps interlock to cooperate, the front end of shell fragment is bent upwards, it places and often opens between contact terminal and the normally closed contact terminal behind the riveted joint moving contact.

As optimal technical scheme of the present utility model, is provided with U type otch in the middle of the described public contact terminal, and its tail surface be provided with about the groove of two pairs of dislocation, left groove and right groove are provided with difference in height, make left groove be lower than right groove.

As optimal technical scheme of the present utility model, horizontal two sides of described shell fragment are by seamless cut-out, formed 4 sections, the middle interconnecting piece of shell fragment divides and whole shell fragment is connected as a whole, is connected to by 4 section active card in the groove of two pairs of dislocation of public contact terminal.Because the tension effect that the left groove of public contact terminal is lower than right groove and the shell fragment middle interconnecting piece divides, the front end both sides of shell fragment can upwards bend by nature, the back-moving spring that is arranged on shell fragment rear end lower surface applies vertically upward active force to the shell fragment rear end, causes the moving contact of shell fragment front end to be pressed on the normally closed contact terminal.

As optimal technical scheme of the present utility model, described housing is provided with and is used for fixing public contact terminal, often opens the mounting groove of contact terminal and normally closed contact terminal.

As optimal technical scheme of the present utility model, described back-moving spring in whole handoff procedure, is in compressed state all the time.

The beneficial effects of the utility model are: with respect to prior art, the utility model has following characteristics:

1. the switch overall structure is simple, and function translation activity mechanism parts are few, is easy to assembling, and is artificial, the cost of material is low;

2. push-button reset is reliable, in whole handoff procedure, back-moving spring is in compressed state all the time, in case remove the pressing force of outer bound pair button, back-moving spring extends at once, and the interlock by shell fragment end, button cooperates button is ejected, realize the switching of switching function and resetting of button, and back-moving spring not current-carrying spare, not loaded current, can not generate heat, can not lose efficacy because of the thermal effect of electric current;

3. disconnect, ON Action is rapid, button is directly realized the switching of switching function by shell fragment, do not have unnecessary transmission parts in the whole handoff procedure;

4. the big current capacity of break-make is strong, whole functional translation activity mechanism is only in public terminal and shell fragment middle part clamping, and the contact area of clamping is bigger, helps bearing great current, the rated current of the utility model sensitive switch can be up to 26A, and is bigger than the rated current 16A of common sensitive switch.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is the structural representation of the sensitive switch of patent No. 200810163021.X;

Fig. 2 is a fractionation structural representation of the present utility model;

Fig. 3 is the structural representation under the utility model normally open;

Fig. 4 is the partial enlarged drawing at Fig. 3 A place;

Fig. 5 is the structural representation under the utility model normally off;

Fig. 6 is the partial enlarged drawing at Fig. 5 B place.

Embodiment

Extremely shown in Figure 4 as Fig. 2, a kind of sensitive switch that improves structure, comprise housing 1, loam cake 2, button 3, shell fragment 4 back-moving springs 5, public contact terminal 6, normally closed contact terminal 7, often open contact terminal 8, the afterbody of public contact terminal 6 is provided with the groove of two pairs of dislocation, 4 section active card of shell fragment are connected in the groove of public contact terminal, middle interconnecting piece divides the 41 U type otch through public contact terminal, button 3 contacts with terminal upper surface 421 cooperations of shell fragment, back-moving spring 5 contacts with terminal lower surface 422 cooperations of shell fragment, button 3, the afterbody 42 of shell fragment, back-moving spring 5 threes keep interlock to cooperate, the front end 43 of shell fragment is natural torsion upwards, it places between normally closed contact terminal 7 and the Chang Kai contact terminal 8 behind the riveted joint moving contact.

In this enforcement, in the middle of the described public contact terminal 6 U type otch is arranged, and its tail surface is provided with the groove of two pairs of dislocation, there are difference in height in the left groove 61 and the right groove 62 of public contact terminal, and left groove 61 is lower than right groove 62.Two horizontal sides of described shell fragment 4 are by seamless cut-out, 4 sections have been formed, the middle interconnecting piece of shell fragment divides 41 to connect whole shell fragment 4 as a whole, be connected in the groove of two pairs of dislocation of public contact terminal 6 by 4 section active card after, low and shell fragment middle interconnecting piece divides 41 tension effect because the left groove 61 of public contact terminal 6 is than right groove 62, front end 43 both sides of shell fragment can upwards bend by nature, and 5 pairs of shell fragment rear ends 42 of back-moving spring that the terminal lower surface 422 of shell fragment is set apply active force vertically upward, cause the moving contact of shell fragment front end 43 to be pressed on the normally closed contact terminal 7.

This enforcement housing 1 is provided with the mounting groove that is used for fixing public contact terminal 6, normally closed contact terminal 7 and Chang Kai contact terminal 8.Back-moving spring 5 is in compressed state all the time in whole handoff procedure.

Operation principle of the present utility model is as described below:

As shown in Figure 3, when not having actuator or driving member to push the button 3 of the utility model sensitive switch, the 5 pairs of shell fragment rear ends 42 of back-moving spring that are in compressive state apply active force vertically upward, with the end 42 of shell fragment jack-up upwards, because four section active card of shell fragment 4 are connected in the left groove 61 and right groove 62 of public contact terminal, and left groove 61 is lower than right groove 62, the shell fragment middle interconnecting piece divides 41 meeting generation tension effect, and its horizontal level is on the left groove 61 of public contact terminal 6, can produce anticlockwise moment to shell fragment front end 43, the moving contact of shell fragment front end 43 is pressed on the normally closed contact terminal 7, button 3 is in reset mode, the internal circuit of electrical equipment is in the state of disconnection, and electrical equipment can't be worked.

As shown in Figure 4, when actuator or driving member are pushed the button of the utility model sensitive switch, the resistance that button 3 overcomes back-moving spring 5 moves down, and drive shell fragment rear end 42 moves down, the shell fragment middle interconnecting piece divides 41 also to move down simultaneously, when the shell fragment middle interconnecting piece divides 41 to move to the below of left groove 61 of public contact terminal 6, can produce clockwise moment to shell fragment front end 43, clockwise rotation can take place in shell fragment front end 43, thereby disconnect the moving contact of shell fragment front end 43 and being connected of normally closed contact terminal 7, and the moving contact of connecting shell fragment front end 43 with often open contact terminal 8 and be connected, button 3 is in the position of energising, the internal circuit of electrical equipment is in closure state, and electrical equipment can be worked.

The utility model is not limited to above-mentioned execution mode, if the structural modification or the modification of sensitive switch belonged to equivalent technologies feature of the present utility model, will be understood that then it falls into protection range of the present utility model.

Claims

1. sensitive switch that improves structure, comprise housing, loam cake, button, back-moving spring, shell fragment, public contact terminal, often open contact terminal, normally closed contact terminal, public contact terminal is provided with groove, it is characterized in that: described shell fragment middle part is connected in the groove of public contact terminal, button contacts with the terminal upper surface cooperation of shell fragment, back-moving spring contacts with the terminal lower surface cooperation of shell fragment, button, the afterbody of shell fragment, the back-moving spring three keeps interlock to cooperate, the front end of shell fragment is bent upwards, it places and often opens between contact terminal and the normally closed contact terminal behind the riveted joint moving contact.

2. the sensitive switch of improvement structure according to claim 1, it is characterized in that: be provided with U type otch in the middle of the described public contact terminal, and the groove of two pairs of dislocation about its tail surface is provided with, left groove and right groove are provided with difference in height, make left groove be lower than right groove.

3. the sensitive switch of improvement structure according to claim 1 and 2, it is characterized in that: horizontal two sides of described shell fragment are by seamless cut-out, 4 sections have been formed, the middle interconnecting piece of shell fragment divides and whole shell fragment is connected as a whole, is connected to by 4 section active card in the groove of two pairs of dislocation of public contact terminal.

4. the sensitive switch of improvement structure according to claim 1 is characterized in that: described housing is provided with and is used for fixing public contact terminal, often opens the mounting groove of contact terminal and normally closed contact terminal.

5. the sensitive switch of improvement structure according to claim 1 is characterized in that: described back-moving spring is in compressed state all the time.