CN202758812U

CN202758812U - A current and temperature dual protector

Info

Publication number: CN202758812U
Application number: CN 201220459911
Authority: CN
Inventors: 常光友; 王东
Original assignee: CHANGZHOU CHANGHONG TONGLI ELECTRICAL APPLIANCE Co Ltd
Current assignee: CHANGZHOU CHANGHONG TONGLI ELECTRICAL APPLIANCE Co Ltd
Priority date: 2012-09-11
Filing date: 2012-09-11
Publication date: 2013-02-27
Anticipated expiration: 2022-09-11

Abstract

The utility model relates to a current and temperature dual protector comprising a housing, a base plate, a piece of bimetallic strip, a stationary contact, a movable contact, and a piece of insulation paper. The front of the piece of bimetallic strip is inclined downwards, while the rear of the piece of bimetallic strip is welded on the inner wall of the housing. The stationary contact is welded on one end of the base plate. The movable contact is correspondingly welded on the front of the piece of bimetallic strip and contacts the stationary contact. The piece of insulation paper is arranged between the housing and the base plate. A front position-limiting boss and a rear position-limiting boss are disposed on the inner wall of the housing by stamping forming from the outer wall of the housing to inner of the housing. The front position-limiting boss is disposed over the movable contact. The rear of the piece of bimetallic strip is welded on the rear position-limiting boss. By the front position-limiting boss limiting the position of the deformation of the piece of bimetallic strip, the piece of bimetallic strip is prevented from deforming beyond the extent so as to result in no capability of recovering back to the shape of free state, and therefore the stability of the access of the protector is ensured.

Description

A kind of current temperature dual protector

Technical field

The utility model relates to a kind of protective device, particularly a kind of current temperature dual protector.

Background technology

Thermal protector is commonly called as temperature detect switch (TDS), generally is overcurrent and overheated cutoff circuit at various motors, power consumption equipment are played a protective role.In recent years make rapid progress especially in the rapid technological improvement, particularly microelectronics correlative technology field, electronic product has goed deep in each family and all trades and professions thus, becomes the indispensable part of the modern life.Therefore the safety of electronic product also more and more is taken seriously, and we must be detected and protect the environment of operation temperature of electronic product and current loading, guarantees normal, the safety of electronic product, more effective running.

In present protector industry; most of protector can only play temperature control function; when only having the ambient temperature of equipment to reach the set point of protector; it just can move open circuit; but some power consumption equipments occur when unusual in running, current surge in the circuit, and potential safety hazard is larger; but existing part protector only has the temperature control effect, can not detect control to electric current in the circuit.

The utility model content

The purpose of this utility model is to overcome the defective that prior art exists, provide a kind of simple in structure, volume is small and exquisite, performance is higher, easy to make, and the low current temperature dual protector of production cost.

The technical scheme that realizes the utility model purpose is: a kind of current temperature dual protector comprises shell, base plate, bimetal leaf, fixed contact, moving contact and insulating paper; The front end of described bimetal leaf is tilted to lower setting, and the rear end is welded on the inwall of shell; Described fixed contact is welded on an end of base plate; The corresponding fixed contact of described moving contact is welded on the front end of bimetal leaf, and moving contact contacts with fixed contact; Described insulating paper is arranged between shell and the base plate; Have on the described outer casing inner wall from the inside stamping forming front limit boss of the outer wall of shell and rear positive stop lug boss; Described front limit boss is positioned at the top of moving contact; The rear end of described bimetal leaf is welded on the rear positive stop lug boss.

The rear end of the described bimetal leaf of technique scheme is welded on the rear positive stop lug boss by stator.

Also has an inside stamping forming projection of the outer wall from shell between front limit boss on the described shell of technique scheme and the rear positive stop lug boss.

The rear and front end of the described shell of technique scheme has mounting ear; Described mounting ear is provided with the electric installation that connects wire.

The described base plate rear end of technique scheme stretches out and is connected with the plug connector of a conduction.

After adopting technique scheme, the utlity model has following positive effect:

(1) has on the outer casing inner wall of the present utility model from the inside stamping forming front limit boss of the outer wall of shell and rear positive stop lug boss; The front limit boss is positioned at the top of moving contact; The rear end of bimetal leaf is welded on the rear positive stop lug boss; By spacing to bi-metal plate deformed of front limit boss, can prevent that bi-metal plate deformed is excessive and can't return to the shape of free state, guarantee thus the stability of the utility model protector path.

(2) rear end of bimetal leaf of the present utility model is welded on the rear positive stop lug boss by stator; Use the stator can to strengthen bimetal leaf and the direct firm welding degree of shell, guaranteed the stability that is connected between shell and the bimetal leaf.

(3) the utility model is when having larger electric current to pass through, and bimetallic sector-meeting direct-detection and reaction are moved, thereby open circuit is effectively protected power consumption equipment; When the operating ambient temperature of power consumption equipment has reached the set temperature value of this novel product, also can open circuit.Therefore, have overcurrent and overheated duplicate protection, greatly effectively protected normal operation and the safe handling of power consumption equipment.

(4) the utility model is when performance is updated, and the structure of product is also being continued to optimize, and more is conducive to the assembling of product, is a kind of simple in structure, volume is small and exquisite, performance is higher Protector for electric appliances.

Description of drawings

Content of the present utility model is easier to be expressly understood in order to make, and the below is described in further detail the utility model, wherein according to specific embodiment also by reference to the accompanying drawings

Fig. 1 is structural representation of the present utility model;

1. shells among the figure, 11. front limit boss, 12. rear positive stop lug boss, 13. projections, 2. base plate, 3. bimetal leaf, 4. fixed contact, 5. moving contact, 6. insulating paper, 7. stator.

Embodiment

(embodiment 1)

See Fig. 1, the utility model comprises shell 1, base plate 2, bimetal leaf 3, fixed contact 4, moving contact 5 and insulating paper 6; The front end of bimetal leaf 3 is tilted to lower setting, and the rear end is welded on the inwall of shell 1; Fixed contact 4 is welded on an end of base plate 2; Moving contact 5 corresponding fixed contacts 4 are welded on the front end of bimetal leaf 3, and moving contact 5 contacts with fixed contact 4; Insulating paper 6 is arranged between shell 1 and the base plate 2; Have on shell 1 inwall from the inside stamping forming front limit boss 11 of the outer wall of shell 1, rear positive stop lug boss 12 and projection 13; Front limit boss 11 is positioned at the top of moving contact 5; Projection 13 is arranged between front limit boss 11 and the rear positive stop lug boss 12; The rear end of bimetal leaf 3 is welded on the rear positive stop lug boss 12 by stator 7.The rear and front end of shell 1 has mounting ear; Mounting ear is provided with the electric installation that connects wire; Base plate 2 rear ends stretch out and are connected with the plug connector of a conduction.

Operation principle of the present utility model is: be connected in the power circuit of power consumption equipment by the mounting ear of shell 1 and the plug connector of base plate 2, when the equipment operation irregularity, current surge, when large electric current passes through protector, bimetal leaf 3 is under the heating effect of current effect, sudden change upset distortion, thus make moving contact 5 and fixed contact 4 contact separations, cutoff circuit; In the equipment course of work, when around ambient temperature when having reached the set temperature value of protector, bimetal leaf 3 is heat-sensitive elements, bimetal leaf 3 upset springs, make moving contact 5 and fixed contact 4 contact separations, thereby open circuit plays the effect of overcurrent and overtemperature protection thus to power consumption equipment; When the electric current of power consumption equipment recovered that normally or all around ambient temperature drops to uniform temperature, bimetal leaf 3 returned to free state again, and moving contact 5 contact again with fixed contact 4, and circuit recovers connection, thereby power consumption equipment can recover to work.

Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. a current temperature dual protector comprises shell (1), base plate (2), bimetal leaf (3), fixed contact (4), moving contact (5) and insulating paper (6); The front end of described bimetal leaf (3) is tilted to lower setting, and the rear end is welded on the inwall of shell (1); Described fixed contact (4) is welded on an end of base plate (2); The corresponding fixed contact of described moving contact (5) (4) is welded on the front end of bimetal leaf (3), and moving contact (5) contacts with fixed contact (4); Described insulating paper (6) is arranged between shell (1) and the base plate (2); It is characterized in that: have on described shell (1) inwall from the inside stamping forming front limit boss of the outer wall of shell (1) (11) and rear positive stop lug boss (12); Described front limit boss (11) is positioned at the top of moving contact (5); The rear end of described bimetal leaf (3) is welded on the rear positive stop lug boss (12).

2. current temperature dual protector according to claim 1, it is characterized in that: the rear end of described bimetal leaf (3) is welded on the rear positive stop lug boss (12) by stator (7).

3. current temperature dual protector according to claim 2 is characterized in that: also have an inside stamping forming projection of the outer wall from shell (1) (13) between the front limit boss (11) on the described shell (1) and the rear positive stop lug boss (12).

4. according to claim 1 and 2 or 3 described current temperature dual protectors, it is characterized in that: the rear and front end of described shell (1) has mounting ear; Described mounting ear is provided with the electric installation that connects wire.

5. current temperature dual protector according to claim 4 is characterized in that: described base plate (2) rear end stretches out and is connected with the plug connector of a conduction.