CN109411276B

CN109411276B - Micro-switch

Info

Publication number: CN109411276B
Application number: CN201811443097.8A
Authority: CN
Inventors: 徐其友; 利宇
Original assignee: Shenzhen Dewei Control System Co ltd
Current assignee: Shenzhen Dewei Control System Co ltd
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2023-08-29
Anticipated expiration: 2038-11-29
Also published as: CN109411276A

Abstract

The application provides a micro-switch, which comprises a button, an upper cover, a base, a normally open terminal, a normally closed terminal, a common terminal, a moving sheet and a lever, wherein the upper cover is arranged on the base; the arc arm extends into the action part from one end, and the other end extends into the drive part, and the arc arm crosses in normally open terminal upper portion, and drive part is when being pushed down under this button exogenic action, and it passes through the arc arm elasticity drive action part upwards displaces, and when this button removes exogenic action, it is under the elastic force effect of restoring through the arc arm, action part resets downwards. The micro switch provided by the application has the advantages that the driving part, the arc-shaped arm and the action part which are sequentially distributed by utilizing one elastic metal sheet are integrally designed, the micro switch is stable and durable, the material cost is low, the assembly efficiency is greatly improved, and the production cost is reduced.

Description

Micro-switch

Technical Field

The application relates to the technical field of switches, in particular to a micro switch.

Background

The micro switch is a kind of switch with micro contact interval and fast acting mechanism, and is covered with casing and has driving rod with relatively small contact interval, so that the micro switch is also called sensitive switch.

The micro-switch has high sensitivity and stability requirements, and the spring contact mechanism of the conventional micro-switch usually uses a spring, so that the structure is complex and the occupied space is large; and normally open terminal and normally closed terminal usually need bending just can be fashioned many times, and manufacturing process is complicated, and the manufacturing degree of difficulty is big, and is with high costs. Therefore, the design ensures the sensitivity and stability of the micro switch, and ensures that the micro switch has simple structure, simple process, easy manufacture, low manufacture difficulty and low cost.

Disclosure of Invention

In order to solve the technical problems, the application provides a structure for simplifying a micro switch, which simplifies the assembly process, is easy to manufacture and reduces the cost.

The application is realized by the following technical scheme:

the application discloses a micro switch, which comprises a button, an upper cover, a base, a normally open terminal, a normally closed terminal, a public terminal, a moving plate and a lever, wherein the normally open terminal, the normally closed terminal and the public terminal are sequentially arranged in the base in a penetrating way, the upper part of the public terminal is respectively connected with the moving plate and the lever, the upper cover is arranged on the base, the upper part of the button extends out of the upper cover, the micro switch further comprises an elastic piece, and the elastic piece is formed by bending an elastic metal sheet and sequentially comprises a driving part, an arc-shaped arm and an action part; the arc arm extends into the action part from one end, and the other end extends into the drive part, the arc arm transversely crosses over the upper part of the normally open terminal, when the drive part is pressed down under the action of external force of the button, the drive part elastically drives the action part to move upwards through the arc arm, and when the external force of the button is removed, the action part is reset downwards under the action of restoring elastic force of the arc arm.

Further, a fixing groove is formed in the top of the base close to the upper portion of the normally open terminal, the bottom of the arc-shaped arm is installed in the fixing groove, and the arc-shaped arm is electrically connected with the normally open terminal.

Further, one end of the lever extends downwards in the vertical direction to form a bending part, the bending part is provided with a first through hole, the first through hole is detachably connected with the driving part, the other end of the lever is provided with a second through hole, and the second through hole is detachably connected with the upper end part of the common terminal.

Further, a rectangular groove is formed in the middle of the lever and used for avoiding the upper portion of the normally open terminal.

Further, a bifurcation is arranged at one end of the moving plate, the bifurcation is clamped and connected with a strip-shaped groove arranged at one side of the upper part of the common terminal, movable contacts are respectively arranged at the top and the bottom of the free end of the moving plate, a third through hole is arranged at the free end of the moving plate, and the third through hole is detachably connected with the action part.

Further, a normally closed terminal fixed contact is arranged at the upper end of the normally closed terminal, a normally open terminal fixed contact is arranged at the upper end of the normally open terminal, and the normally open terminal fixed contact is located above the normally closed terminal fixed contact.

Further, the elastic piece is processed by beryllium copper, tin bronze, stainless steel or titanium metal materials.

The micro switch has the following technical characteristics and beneficial technical effects:

compared with the prior art, the spring contact mechanism in the micro switch generally uses a spring, the structure is complex, the occupied space is large, the elastic piece is adopted as the restoring power in the technical scheme of the application, the switch conversion function can be realized, the action is stable and reliable, the assembly is convenient, the production cost is greatly reduced, and the efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is an exploded view of a micro switch according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a portion of a micro switch according to an embodiment of the present application;

fig. 3 is a schematic diagram of an external structure of a micro switch according to an embodiment of the application.

Wherein: the device comprises a button 1, an upper cover 2, a base 3, a normally open terminal 4, a normally open terminal stationary contact 41, a normally closed terminal 5, a normally closed terminal stationary contact 51, a common terminal 6, a strip-shaped groove 61, a moving sheet 7, a bifurcation opening 71, a moving contact 72, a third through hole 73, a lever 8, a bending part 81, a first through hole 82, a second through hole 83, a rectangular groove 84, an elastic piece 9, a driving part 91, an arc-shaped arm 92, an action part 93 and a fixing groove 10.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The micro-switch generally adopts a spring piece as a force secondary transmission module, and the spring piece is in quick contact with a fixed contact to complete the switching-on or switching-off operation; because of the need of better rebound effect and longer service life of the spring piece, the spring piece is generally made of materials with good elasticity, such as specially-made beryllium bronze, tin bronze, stainless steel and the like.

Referring to fig. 1, 2 and 3, a micro switch according to a preferred embodiment of the present application includes a button 1, an upper cover 2, a base 3, a normally open terminal 4, a normally closed terminal 5, a common terminal 6, a moving plate 7 and a lever 8, wherein the normally open terminal 4, the normally closed terminal 5 and the common terminal 6 are sequentially arranged in the base 3 in a penetrating manner, the upper part of the common terminal 6 is respectively connected with the moving plate 7 and the lever 8, the upper cover 2 is arranged on the base 3, the upper part of the button 1 extends out of the upper cover 2, the micro switch further includes an elastic member 9, the elastic member 9 is formed by bending an elastic metal sheet and is sequentially divided into a driving part 91, an arc arm 92 and an action part 93; the arc arm 92 extends from one end to an action part 93, the other end extends to a driving part 91, the arc arm 92 crosses the upper part of the normally open terminal 4, when the driving part 91 is pressed down under the action of the external force of the button 1, the action part 93 is elastically driven to move upwards by the arc arm 92, and when the external force of the button 1 is removed, the action part 93 is reset downwards under the action of the restoring elastic force of the arc arm 9.

Preferably, a fixing groove 10 is arranged at the top of the base 3 near the upper part of the normally open terminal 4, the bottom of the arc-shaped arm 92 is arranged in the fixing groove 10, and the arc-shaped arm 92 is electrically connected with the normally open terminal 4.

One end of the lever 8 extends downwards in the vertical direction to form a bending part 81, the bending part 81 is provided with a first through hole 82, the first through hole 82 is detachably connected with the driving part 91, the other end of the lever 8 is provided with a second through hole 83, and the second through hole 83 is detachably connected with the upper end part of the common terminal 6.

The lever 8 is provided with a rectangular groove 84 in the middle, the rectangular groove 84 being used to keep away the upper part of the normally open terminal 4.

One end of the moving plate 7 is provided with a bifurcation 71, the bifurcation 71 is clamped and connected with a strip-shaped groove 61 arranged on one side of the upper part of the common terminal 6, the top and the bottom of the free end of the moving plate 7 are respectively provided with a movable contact 72, the free end of the moving plate 7 is provided with a third through hole 73, and the third through hole 73 is detachably connected with the action part 93.

The upper end of the normally closed terminal 5 is provided with a normally closed terminal fixed contact 51, the upper end of the normally open terminal 4 is provided with a normally open terminal fixed contact 41, and the normally open terminal fixed contact 41 is positioned above the normally closed terminal fixed contact 51.

The elastic member 9 is made of beryllium copper, tin bronze, stainless steel, or titanium metal material.

The further explanation is as follows:

the application provides a long-travel micro switch with a spring plate structure, which comprises a button, an upper cover, a lever, an elastic piece, a normally closed terminal fixed contact, a normally open terminal fixed contact, a public terminal, a movable contact, a movable piece and a base. The base, the normally open terminal, the normally closed terminal and the common terminal are combined and fixed together by adopting an encapsulation process, and a fixing groove is formed in the top of the base; the button is put into the button groove of upper cover from the upper cover bottom, the button head stretches out the upper cover, button bottom and lever one end contact, the lever other end is connected with common terminal, the lever is close to the one end of button and is equipped with rectangular first through-hole, the drive portion of elastic component inserts rectangular first through-hole and is connected, the action portion of the elastic component other end is connected with a rectangle third through-hole on the moving plate, moving plate one end has forked port card in the bar groove of common terminal upper end to be connected with common terminal, under the condition that does not receive external force effect, moving contact on the moving plate contacts the normal close terminal stationary contact on the normal close terminal, form the passageway that common terminal and normal close terminal are connected. When the button is not acted by external force, the restoring force generated by the elastic element due to the compression can disconnect the normally open terminal static contact of the movable plate and the normally open terminal, and the movable plate returns to the state of contact with the normally closed static contact of the normally open terminal, thereby realizing the switching between the bidirectional circuits and the switching function of the switch bidirectional NO-OFF-ON.

The specific embodiments described herein are offered by way of illustration only. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the application or exceeding the scope of the application as defined in the accompanying claims.

Claims

1. The utility model provides a micro-gap switch, includes button, upper cover, base, normally open terminal, normally closed terminal, public terminal, moving plate and lever, normally open terminal, normally closed terminal and public terminal run through in proper order and set up in the base, public terminal's upper portion is connected with moving plate and lever respectively, the upper cover is located on the base, the upper portion of button stretches out in this upper cover, its characterized in that, micro-gap switch still includes an elastic component, the elastic component is formed by the bending of an elastic sheet metal, divide into drive part, arc arm and action part in proper order; the arc arm extends from one end to an action part, the other end of the arc arm extends to a driving part, the arc arm transversely penetrates through the upper part of the normally open terminal, when the driving part is pressed down under the action of external force of the button, the driving part elastically drives the action part to move upwards through the arc arm, and when the external force of the button is removed, the action part is reset downwards under the action of restoring the elastic force of the arc arm;

a fixing groove is formed in the top of the base and close to the upper part of the normally open terminal, the bottom of the arc-shaped arm is arranged in the fixing groove, and the arc-shaped arm is electrically connected with the normally open terminal;

the lever one end extends downwards in the vertical direction to form a bending part, the bending part is provided with a first through hole, the first through hole is detachably connected with the driving part, the other end of the lever is provided with a second through hole, and the second through hole is detachably connected with the upper end part of the common terminal.

2. The micro switch according to claim 1, wherein a rectangular groove is provided in a middle portion of the lever, the rectangular groove being for avoiding an upper portion of the normally open terminal.

3. The micro-switch according to claim 1, wherein one end of the moving plate is provided with a bifurcation, the bifurcation is connected with a bar-shaped groove arranged on one side of the upper part of the common terminal in a clamping way, the top and the bottom of the free end of the moving plate are respectively provided with a movable contact, the free end of the moving plate is provided with a third through hole, and the third through hole is detachably connected with the action part.

4. The microswitch of claim 1 wherein a normally closed terminal stationary contact is provided at an upper end of the normally closed terminal and a normally open terminal stationary contact is provided at an upper end of the normally open terminal, the normally open terminal stationary contact being located above the normally closed terminal stationary contact.

5. The microswitch of claim 1 wherein the spring is machined from beryllium copper, or tin bronze, or stainless steel, or titanium metal material.