CN103632901A

CN103632901A - Fuse type dry heating protector

Info

Publication number: CN103632901A
Application number: CN201210308785.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: NINGBO JIASHANG ELECTRICAL APPLIANCE CO Ltd
Current assignee: NINGBO JIASHANG ELECTRICAL APPLIANCE CO Ltd
Priority date: 2012-08-28
Filing date: 2012-08-28
Publication date: 2014-03-12

Abstract

A fuse type dry heating protector is composed of a porcelain shell, a static contact sheet, a moving contact sheet, wiring sheets, rivets, a porcelain cover, a hot melt ejector pin, a cover cap and the like. The fuse type dry heating protector is assembled as shown in Fig.1, through the following manners that the static contact sheet, the moving contact sheet and two wiring sheets are fixed on the porcelain shell through the rivets, wherein the static contact sheet and the moving contact sheet are arranged inside the porcelain shell, and the wiring sheets are arranged at the exterior of the porcelain shell; the static contact sheet, the rivet and one wiring sheet form electric connection, and the moving contact sheet, the rivet and the other wiring sheet form electric connection; a gap wide enough is formed between the two sets of electric connection; a contact on the static contact sheet and a contact on the moving contact sheet are corresponding to each other with an interval from 1 to 5 mm formed therebetween; one thick end of the hot melt ejector pin is inserted into a corresponding hole in the moving contact sheet, and is positioned through the porcelain cover; the porcelain cover is just mounted at a port of the porcelain shell and is fixed on the porcelain shell through the cover cap; the other end of the hot melt ejector pin extends out from the cover cap; an elastic metal sheet is made into a U-shaped structure so as to form the moving contact sheet; and the hot melt ejector pin is made of low-melting plastics. With the fuse type dry heating protector of the invention adopted, the defect of low reaction sensitivity of an original dry heating protector can be eliminated.

Description

Fuse Type protector

Technical field

The present invention relates to a kind of protector shielding during for household electrical appliance generation dry combustion method; its operation principle is that, when electrical equipment generation dry combustion method or overtemperature, a fusible part of protector senses that high temperature melts; thereby cut-out circuit, is protected electrical equipment.

Background technology

According to household electrical appliance standard-required, in order to prevent that the reasons such as dry combustion method from causing the security incident of overtemperature initiation fire, household electrical appliance all will configure protector, the protector adopting is at present divided into and automatically resets, hand-reset and Fuse Type three types, its operation principle is all that the heating part of electrical equipment imports heat into the senser of protector inside by protector shell, senser is pressed design temperature action, cut off current channel, thereby play the effect of protective device, the shell of protector requires insulation, and insulating material is all hot non-conductor, so temperature rise speed is very fast while occurring for overtemperatures such as dry combustion methods, the unrestricted electrical equipment rising of temperature, above-mentioned protector just can not move in time, such as the powerful electrothermal tube of heating up water, once lack of water generation dry combustion method, its temperature just can rise to several Baidu within the several seconds, and protector was wanted and within tens of seconds, was just had response, electrical equipment burns already when the time comes.

Summary of the invention

The present invention is directed to the insensitive deficiency of reaction that above-mentioned traditional protector exists, proposed a kind of a kind of Fuse Type protector that sensing element is directly fitted in to heating part.

The technical solution adopted for the present invention to solve the technical problems is: Fuse Type protector is by porcelain shell 1, static contact 2, movable contact spring 3, lug plate 4, rivet 5, porcelain lid 6, the parts such as hot melt thimble 7 and cover cap 8 form, by static contact 2, movable contact spring 3 and two lug plate 4 use rivets 5 are fixed on porcelain shell 1, static contact 2 and movable contact spring 3 are in the inside of porcelain shell, lug plate 4 externally, static contact 2, rivet 5 and a lug plate 4 form and electrically connect, movable contact spring 3, rivet 5 and another lug plate 4 form and electrically connect, two groups form enough gaps between electrically connecting, contact 10 on static contact 2 and the contact 10 on movable contact spring 3 are in correspondence with each other, and form the spacing of 1-5mm, one that hot melt thimble 7 is thicker is inserted in through hole 11 corresponding on movable contact spring 3, and locate with porcelain lid 6, porcelain lid 6 is contained in porcelain shell 1 port, and be fixed on porcelain shell 1 with cover cap 8, cover cap 8 is stretched out in the other end of hot melt thimble 7.

Described Fuse Type protector, is characterized in that, movable contact spring 3 use elastic sheet metals are made into " U " shape, on one side it is fixed in porcelain shell 1, another side can be promoted the contact 10 above it is contacted with the contact 10 on static contact 2 by hot melt thimble 7.

Described Fuse Type protector, is characterized in that, hot melt thimble 7 is made by low melting point plastic.

Described Fuse Type protector, is characterized in that, the another kind of structure of hot melt thimble 7 is that its overhanging head is inlayed low-melting-point metal silk 13.

The invention has the beneficial effects as follows and solved the low shortcoming of original protector reaction sensitivity, make the electrical equipment of heating up water fast have suitable protector.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is structure chart of the present invention.

Fig. 2 is the structure chart of movable contact spring.

Fig. 3 is the hot melt thimble that head is inlayed low-melting-point metal silk.

Embodiment

Below in conjunction with accompanying drawing, feature of the present invention and correlated characteristic are described further, so that technical staff of the same trade is easier to understand:

As accompanying drawing 1-3 signal, label wherein represents respectively: 1-porcelain shell, 2-static contact, 3-movable contact spring, 4-lug plate, 5-rivet, 6-porcelain lid, 7-hot melt thimble, 8-cover cap, 10-contact, 11-through hole, 12-rivet hole, 13-low-melting-point metal silk

Embodiment:

Fuse Type protector is by porcelain shell, static contact, movable contact spring, lug plate, rivet, porcelain lid, the parts such as hot melt thimble and cover cap form, its package assembly is as Fig. 1, by static contact, movable contact spring and two lug plates are fixed on porcelain shell with rivet, static contact and movable contact spring are in the inside of porcelain shell, lug plate externally, static contact, rivet and a lug plate form and electrically connect, movable contact spring, rivet and another lug plate form and electrically connect, two groups form enough gaps between electrically connecting, contact on static contact and the contact on movable contact spring are in correspondence with each other, and form the spacing of 1-5mm, one that hot melt thimble is thicker is inserted in hole corresponding on movable contact spring, and locate with porcelain lid, porcelain mounts cover at porcelain shell port, and be fixed on porcelain shell with cover cap, cover cap is stretched out in the other end of hot melt thimble, contact on its height value and static contact is suitable with the spacing between the contact on movable contact spring, when protector is used, hot melt thimble is pushed into, thereby promoting movable contact spring makes the contact on it contact with the contact of static contact, make conducting between two lug plates of protector.

Movable contact spring is made into " U " shape with elastic sheet metal, it is fixed in porcelain shell on one side, another side can be promoted the contact above it is contacted with the contact on static contact by hot melt thimble, can return to original position again after losing the promotion of hot melt thimble, and the shape of movable contact spring as shown in Figure 2.

Hot melt thimble is made by low melting point plastic, and during use, hot melt thimble withstands on heating surface, when the temperature of heating surface surpasses plastics fusing point, the fusing of hot melt thimble head, movable contact spring utilizes its elasticity to recover shape, thereby the contact between break contact can be cut off the electricity supply thus.

The another kind of structure of hot melt thimble is that its overhanging head is inlayed low-melting-point metal silk, and as Fig. 3, low-melting-point metal is temperature sensor more accurately.

Although below with reference to accompanying drawing to having done to elaborate according to the design of the object of the invention and example; but those of ordinary skills can recognize; do not departing under the precondition of claim limited range; still can make various improvement and conversion to the present invention, and this improvement and conversion still should belong to protection scope of the present invention.

Claims

1. a Fuse Type protector, it is characterized in that: Fuse Type protector is by porcelain shell (1), static contact (2), movable contact spring (3), lug plate (4), rivet (5), porcelain lid (6), the parts such as hot melt thimble (7) and cover cap (8) form, static contact (2), movable contact spring (3) and two lug plates (4) are fixed on porcelain shell (1) with rivet (5), static contact (2) and movable contact spring (3) are in the inside of porcelain shell (1), lug plate (4) externally, static contact (2), rivet (5) and a lug plate (4) form and electrically connect, movable contact spring (3), rivet (5) and another lug plate (4) form and electrically connect, contact (10) on static contact (2) and the contact (10) on movable contact spring (3) are in correspondence with each other, and form the spacing of 1-5mm, one that hot melt thimble (7) is thicker is inserted in the upper corresponding through hole (11) of movable contact spring (3), and locate with porcelain lid (6), porcelain lid (6) is contained in porcelain shell (1) port, and be fixed on porcelain shell (1) with cover cap (8), cover cap (8) is stretched out in the other end of hot melt thimble (7).

2. Fuse Type protector according to claim 1; it is characterized in that: movable contact spring (3) is made into " U " shape with elastic sheet metal; it is fixed in porcelain shell (1) on one side, and another side can be promoted the contact (10) above it is contacted with the contact (10) on static contact (2) by hot melt thimble (7).

3. Fuse Type protector according to claim 1, is characterized in that: hot melt thimble (7) is made by low melting point plastic.

4. Fuse Type protector according to claim 1, is characterized in that: the another kind of structure of hot melt thimble (7) is that its overhanging head is inlayed low-melting-point metal silk (13).