WO2016041109A1

WO2016041109A1 - Novel breakaway switch

Info

Publication number: WO2016041109A1
Application number: PCT/CN2014/001142
Authority: WO
Inventors: 张有辉
Original assignee: 广东华田电器有限公司; 张有辉
Priority date: 2014-09-19
Filing date: 2014-12-19
Publication date: 2016-03-24
Also published as: CN104252994A

Abstract

A novel breakaway switch comprising a base (1), a guiding frame (2) embedded on the base, a bimetal sheet (3) mounted at the guiding frame, and, mounted in the base, a movable spring piece (11) and a wiring terminal (12). The base is provided with an aluminum cover (4) for enclosing the bimetal sheet and the guiding frame in the base. An insulated actuating shaft (13) is also provided in the base. One extremity of the insulated actuating shaft is abutted against the movable spring piece, while the other extremity runs through the guiding frame to be abutted against the bimetal sheet. The wiring terminal runs through the bottom of the base. The wiring terminal comprises a movable terminal (121) and a static terminal (122). The movable terminal and the static terminal are arranged opposite. One extremity of the movable spring piece is fixed with the movable terminal, while the other extremity serves as a movable contact abutted against the static terminal. The novel breakaway switch has a simple structure, stable performance, and extended service life.

Description

A new type of snap switch

Technical field

The invention relates to the technical field of home appliance temperature control products, in particular to a novel snap switch.

Background technique

Mechanical temperature controllers are generally fabricated by the principle of biaxial expansion and contraction. Traditional mechanical temperature controllers mainly include: a base, first and second contact pieces mounted in the base, and mounted on the base. The first and second lugs which are electrically connected to the first and second contact pieces respectively, and the upper cover which is embedded on the base and the bimetal mounted in the upper cover, wherein the second contact piece passes through The integrally connected moving spring piece and the first contact piece form an electrical connection to form a passage. The base is provided with an aluminum cover for enclosing the bimetal and the upper cover in the base. An insulating actuator rod is further mounted on the base, and one end of the insulating actuator rod is in contact with the movable spring piece, and the other end is in contact with the bimetal through the upper cover. The first and second contacts are fixedly connected to the first and second lugs mounted on the bottom of the base by rivets, as shown in FIG. The mechanical temperature controller of this structure, when the high temperature of the bimetal reaches a certain value, the bimetal starts to sense the temperature, and when the temperature rises to a certain level (over temperature), the bimetal is deformed and convex downward. Out, thereby driving the insulating actuator to move downward, the insulating actuator pushing the moving spring downward, so that the moving spring on the second contact piece and the first contact piece are separated, so that the first contact piece and the second contact piece Not conductive, no longer heated. When the temperature drops to a certain extent, the bimetal is reset, thereby driving the insulation rod to move upward, the moving spring will be reset upward, the second contact piece and the first contact piece are turned on again, and the heating circuit continues to work.

The mechanical thermostat of the above structure has been used for many years. During use, it is found that since the first and second contact pieces and the lug are riveted structures, the riveted portion is liable to loosen the contact piece due to high temperature, which may cause excessive contact on the one hand. Resistance and stray inductance affect the control circuit. On the other hand, loose contact of the contact piece can cause poor contact of the moving reed, which greatly affects product quality.

Summary of the invention

The object of the present invention is to provide a novel snap switch with simple structure, stable performance and long service life.

A novel snap switch according to the present invention includes a base, a guide frame embedded in the base, a bimetal mounted on the guide frame, a movable spring mounted in the base, and a terminal, the base Provided with an aluminum cover for encapsulating the bimetal and the guide frame in the base, the base is further provided with an insulation execution rod, one end of the insulation execution rod is in contact with the movable spring, and the other end passes through the The guiding frame is in contact with the bimetal, the connecting terminal passes through the bottom of the base, the connecting terminal comprises a moving terminal and a static terminal, and the moving terminal and the static terminal are oppositely arranged, the moving spring One end of the piece is fixed to the movable terminal, and the other end acts as a movable contact against the static terminal.

The novel snap switch of the invention simplifies the contact piece structure of the traditional mechanical thermostat, avoids the contact resistance and stray inductance of the control circuit, and the terminal is directly fixed to the base through the bottom of the base. The contact between the moving spring and the terminal is ensured, which improves the stability and service life of the product.

Further, the terminal is closely attached to the inner wall of the base, and the terminal is provided with a terminal limiting slot, so that the terminal can be well positioned to prevent the terminal from shaking.

As a preferred embodiment, the moving spring is fixedly connected to the movable terminal by a rivet.

In another preferred embodiment, the movable spring is integrally formed with the movable terminal, and the component connection point can be further reduced.

The portion of the terminal that passes through the base is deformed by deformation, so that when the terminal is inserted into the base, the part of the terminal that is bent out of the base can be clamped and deformed to complete the installation, which is simple and convenient.

In another embodiment, the portion of the terminal that passes through the base is returned by the deformation claw, so that the deformation claw can be disposed on the connection terminal, and when the assembly is inserted into the base, the terminal will be inserted. The deformed jaws on the portion of the terminal that passes through the base are clamped and deformed to catch the perforations at the bottom of the base, leaving the root of the terminal for convenient wiring.

DRAWINGS

FIG. 1 is a schematic structural view of a conventional snap-type mechanical thermostat.

2 is a schematic structural view of a kick switch according to the present invention.

Figure 3 is a schematic view showing the structure of Embodiment 3 of the present invention.

detailed description

The specific embodiments of the present invention, such as the shape and structure of the components involved, the mutual position and connection relationship between the parts, the functions and working principles of the parts, etc., are further described below with reference to the accompanying drawings. Detailed description.

As shown in FIG. 1 , the novel kick switch of the present invention comprises a base 1 , a guide frame 2 embedded in the base 1 , a bimetal 3 mounted on the guide frame 2 , and a movable spring mounted in the base 1 . 11 and the terminal 12, the base 1 is provided with an aluminum cover 4 for enclosing the bimetal 3 and the guide frame 2 in the base 1, and the base 1 is further provided with an insulation execution rod 13 for insulating one end of the rod 13 The movable reed 11 is in contact with the other end, and the other end is in contact with the bimetal 3 through the guide frame 2. The terminal is passed through the bottom of the base 1. The terminal 12 includes a movable terminal 121 and a static terminal 122, and the movable terminal 121 and the static terminal 122 is oppositely arranged, one end of the movable spring 11 is fixed to the movable terminal 121, and the other end 111 The movable contact is in contact with the stationary terminal 122. The terminal 12, that is, the movable terminal 121 and the static terminal 122 are closely attached to the inner wall of the base 1, and the base 1 is provided with a terminal limiting slot (not shown).

Example 1:

As a preferred embodiment, the movable spring piece 11 is fixedly coupled to the movable terminal 121 by a rivet 51 and a rivet 52. The portion 120 of the terminal 12 that passes through the base is stopped by deformation.

Example 2:

Different from the first embodiment, the movable spring is integrally formed with the movable terminal. The portion of the terminal that passes through the base is stopped by the deformation claw (not shown).

Example 3:

As another preferred embodiment, a static contact 1221 of the same material as the movable contact 111 is riveted at a position where the static terminal 122 is in contact with the movable contact 111 to better ensure electrical connection.

Claims

A novel snap switch characterized by comprising a base, a guide frame embedded on the base, a bimetal mounted on the guide frame, a movable spring mounted in the base, and a connection terminal, the base Provided with an aluminum cover for encapsulating the bimetal and the guide frame in the base, the base is further provided with an insulation execution rod, one end of the insulation execution rod is in contact with the movable spring, and the other end passes through the The guiding frame is in contact with the bimetal, the connecting terminal passes through the bottom of the base, the connecting terminal comprises a moving terminal and a static terminal, the moving terminal and the static terminal are oppositely arranged, and one end of the moving spring is fixed to the moving terminal The other end acts as a movable contact against the static terminal.
The novel snap switch according to claim 1, wherein the terminal is in close contact with the inner wall of the base, and the terminal is provided with a terminal limiting groove.
The novel snap switch according to claim 2, wherein the movable spring is fixedly coupled to the movable terminal by a rivet.
The novel snap switch according to claim 2, wherein the movable spring is integrally formed with the movable terminal.
A novel snap switch according to any one of claims 1 to 4, characterized in that the portion of the terminal which passes through the base is prevented from being deformed by deformation.
A novel snap switch according to any one of claims 1 to 4, characterized in that the portion of the terminal which passes through the base is stopped by the deformation claw.