CN201898062U

CN201898062U - Microswitch

Info

Publication number: CN201898062U
Application number: CN201020636293XU
Authority: CN
Inventors: 汪信良
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-01
Filing date: 2010-12-01
Publication date: 2011-07-13
Anticipated expiration: 2020-12-01

Abstract

A microswitch belongs to the field of switches, and comprises an upper seat body, a tension spring, a movable contact piece and a lower seat body connected with the upper seat body, wherein an automatic reset button is mounted on the upper seat body; the lower seat body is connected with a movable contact piece seat, a normally open static contact and a normally closed static contact; the left end of the movable contact piece props against a chute at the right end of the movable contact piece seat, and the right end of the movable contact piece is clung to the normally closed static contact; the right end of the tension spring is connected with the movable contact piece; a projection is arranged at the left end of the movable contact piece seat and connected with the left end of the tension spring; and the bottom of the automatic reset button is clung to the tension spring. The utility model solves the problems that a microswitch in the prior art is more difficult to assemble and has higher manufacturing cost because more related components for controlling the action of a movable contact piece exist in the microswitch and have more complicated connecting relation. The microswitch provided by the utility model has the advantages of simple structure, convenience in assembly and low manufacturing cost.

Description

Sensitive switch

Technical field

The utility model relates to a kind of switch, particularly a kind of sensitive switch.

Background technology

As everyone knows, sensitive switch is a kind of quick converting switch of exerting pressure and actuating, and it is installed in the equipment that needs frequent changing-over circuit usually, has functions such as the automatic control of equipment and safeguard protections.At present, prior art has a kind of sensitive switch, as shown in Figure 1, comprise upper pedestal 1, compressing tablet 15, stage clip 16, extension spring 5, movable contact spring 6 and the lower base 2 that is connected with upper pedestal 1, push button 7 is installed on the upper pedestal 1, be connected with movable contact bar 8 on the lower base 2, often open static contact 9 and normally closed static contact 10, compressing tablet 15 1 ends are connected with the boss 17 of being located at lower base 2 right-hand members, its other end withstands on push button 7 bottoms and is connected with stage clip 16 upper ends, stage clip 16 lower ends withstand on the lower base 2, movable contact spring 6 one ends withstand in the chute 18 of movable contact bar 8 right-hand members, and its other end and normally closed static contact 10 are close to, and extension spring 5 is connected between compressing tablet 15 and the movable contact spring 6.The operation principle of the sensitive switch of said structure is: push button 7 is pushed compressing tablet 15 1 ends downwards under the effect of external force, compressing tablet 15 is bent downwardly compression press spring 16, and drive connected extension spring 5 left ends simultaneously and move down, when extension spring 5 left ends are lower than extension spring 5 right-hand members, extension spring 5 right-hand members generation snap action spurs connected movable contact spring 6 and moves down, movable contact spring 6 right-hand members and normally closed static contact 10 are separated, and contact, thereby realize the circuit changing-over with often opening static contact 9; In the time of after removing the external force that acts on the push button 7, push button 7 restPoses, this moment, compressing tablet 15 moved up under the elastic force effect of stage clip 16, extension spring 5 left ends move up under the drive of compressing tablet 15, when extension spring 5 left ends were higher than extension spring 5 right-hand members, extension spring 5 right-hand members produced snap action pulling movable contact spring 6 and move up, and made movable contact spring 6 right-hand members and often opened static contact 9 and separate, and contact, thereby recover initial circuit with normally closed static contact 10.The associated components of being not difficult to find to be used in this sensitive switch to control movable contact spring 6 actions from the structure of above-mentioned sensitive switch and operation principle thereof is more, annexation between them is also comparatively complicated, not only assembly difficulty is bigger thereby caused the sensitive switch of said structure, and its production cost is also higher.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of simple in structure, easy to assembly, the sensitive switch that production cost is low.

For solving the problems of the technologies described above, the utility model provides a kind of sensitive switch of following structure: comprise upper pedestal, extension spring, movable contact spring and the lower base that is connected with upper pedestal, push button is installed on the upper pedestal, be connected with the movable contact bar on the lower base, often open static contact and normally closed static contact, the movable contact spring left end withstands in the chute of movable contact bar right-hand member, its right-hand member and normally closed static contact are close to, the extension spring right-hand member is connected on the movable contact spring, wherein, movable contact bar left end is provided with projection, the extension spring left end is connected with projection, and the push button bottom is close to extension spring.

After adopting said structure, compared with prior art, the utlity model has following advantage: because the utility model sensitive switch is by being connected to the extension spring left end on the projection of being located at movable contact bar left end, and in having saved the prior art sensitive switch, be used to control the compressing tablet of movable contact spring action, stage clip and being located under the condition of three associated components of boss of lower base right-hand member, directly push the action downwards of extension spring control movable contact spring downwards by push button and realizes that circuit changing-over and the resilience force control movable contact spring by extension spring upwards move the mode of recovering initial circuit and realized and prior art sensitive switch identical functions, therefore not only simplified the structure of the utility model sensitive switch greatly, make things convenient for the product assembling, but also reduced the production cost of the utility model sensitive switch.

Description of drawings

Fig. 1 is the broken section structural representation of prior art sensitive switch.

Fig. 2 is the broken section structural representation of the utility model sensitive switch.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model sensitive switch is described in further detail.

As shown in Figure 2; in this embodiment; the utility model sensitive switch comprises upper pedestal 1; extension spring 5; movable contact spring 6; movable contact bar 8; often open static contact 9; normally closed static contact 10 and the lower base 2 that is connected with upper pedestal 1 by tubular rivet 11; push button 7 is installed on the upper pedestal 1; push button 7 bottoms are provided with a projection 13; movable contact bar 8; often opening static contact 9 and normally closed static contact 10 is connected with lower base 2 by a screw assemblies 14 respectively; movable contact spring 6 left ends withstand in the chute 18 of movable contact bar 8 right-hand members; its right-hand member and normally closed static contact 10 are close to; extension spring 5 right-hand members are connected on the movable contact spring 6; movable contact bar 8 left ends are provided with projection 14; extension spring 5 left ends are connected with projection 14; projection 13 bottoms and extension spring 5 are close to; be connected with a protective cover 2 on the lower base 2, the left end opening part of protective cover 2 is socketed with pilot protection cover 3.Push button 7 and screw assemblies 12 in the utility model sensitive switch are existing routine techniques, so do not give unnecessary details at this.

The operation principle of the utility model sensitive switch is: push button 7 is pushed extension spring 5 downwards under the effect of external force, extension spring 5 pressurized places move down and drive extension spring 5 right-hand members and move down, under the pulling of extension spring 5 right-hand members, movable contact spring 6 right-hand members separate with normally closed static contact 10, and contact, thereby realize the circuit changing-over with often opening static contact 9; In the time of after removing the external force that acts on the push button 7, push button 7 restPoses, extension spring this moment 5 pressurizeds are in to move up under the resilience force effect and drive extension spring 5 right-hand members and move up, under the pulling of extension spring 5 right-hand members, movable contact spring 6 right-hand members with often open static contact 9 and separate, and contact, thereby recover initial circuit with normally closed static contact 10.

Claims

1. sensitive switch, comprise upper pedestal (1), extension spring (5), movable contact spring (6) and the lower base (2) that is connected with upper pedestal (1), push button (7) is installed on the upper pedestal (1), be connected with movable contact bar (8) on the lower base (2), often open static contact (9) and normally closed static contact (10), movable contact spring (6) left end withstands in the chute (18) of movable contact bar (8) right-hand member, its right-hand member and normally closed static contact (10) are close to, described extension spring (5) right-hand member is connected on the movable contact spring (6), it is characterized in that: described movable contact bar (8) left end is provided with projection (14), described extension spring (5) left end is connected with projection (14), and described push button (7) bottom is close to extension spring (5).