CN202977348U

CN202977348U - Surface-mounted fuse

Info

Publication number: CN202977348U
Application number: CN 201220703004
Authority: CN
Inventors: 田伟; 龚建; 仇利民; 杨兆国
Original assignee: Suzhou Jingxun Technology Co Ltd
Current assignee: Suzhou Jingxun Technology Co Ltd
Priority date: 2012-12-18
Filing date: 2012-12-18
Publication date: 2013-06-05
Anticipated expiration: 2022-12-18

Abstract

The utility model discloses a surface-mounted fuse. The fuse comprises a fuse body in the middle of which a circular through hole is formed, a ceramic fiber rod positioned in the circular through hole of the fuse body, and a metal wire wound on the outer surface of the ceramic fiber rod to form a core rod, wherein a silica gel layer is arranged between an area between the left and right ends of the core rod and the fuse body; a first metal layer is arranged at the left and right ends and the end face of the core rod; a second metal layer is arranged on each of the inner wall of the circular through hole and an area close to the end face of the circular through hole; two metal covers are positioned at the two ends of the fuse body respectively and cover the two ends of the circular through hole to form a closed cavity; a welding sheet is filled among the metal covers, the core rod and the silica gel layer; and the welding sheet is electrically connected with the first metal layers and the second metal layers. The surface-mounted fuse has high temperature resistance and high strength, and can well wrap a fuse wire and arc extinguishing glass; the overall strength, the breaking capacity and the cold and hot impact resistance of the fuse are greatly improved; and the fuse facilitates large-batch production.

Description

Surface mounting fuse protector

Technical field

The utility model relates to a kind of fuse, relates in particular to a kind of surface mounting fuse protector.

Background technology

Surface mounting fuse protector is mainly used in the overcurrent protection of printed circuit board (PCB) and other circuit, and its principle is that when circuit broke down or be abnormal, fuse metal bath self fusing was cut off electric current and realized protective circuit.

Traditional wear fuse wiry in insulator, modal is to link with termination electrode after fuse is penetrated the ceramic body internal cavity again, its advantage is that this fuse breaking capacity is larger, and consistency is also better, shortcoming is that fuse is tiny easily broken, wears a complex process, inefficiency, be difficult to carry out large batch of making, and the fuse shape can design limited.

Summary of the invention

The utility model provides a kind of surface mounting fuse protector, this surface mounting fuse protector has high temperature resistant, high strength, can be well with fuse and arc extinguishing glass-coated interior, improve greatly bulk strength and breaking capacity and the cold-hot impact capacity of fuse, and be convenient to produce in enormous quantities.

for achieving the above object, the technical solution adopted in the utility model is: a kind of surface mounting fuse protector, comprise the fusing body that has manhole in the middle of, one ceramic fibre rod is positioned at the manhole of described fusing body, thereby a wire is wound in described ceramic fibre rod outer surface and forms the fusible core rod, this fusible core rod is left, has layer of silica gel between zone and fusing body between the right part, the left side of described fusible core rod, right part and its end face all have the first metal layer, the zone of described manhole inwall and close its end face has the second metal level, thereby two crown caps lay respectively at described fusing body two ends and cover its manhole two ends formation closed chamber, this crown cap and fusible core rod, be filled with a weld tabs between layer of silica gel, this weld tabs and the first metal layer, be electrically connected between the second metal level.

In technique scheme, improved technical scheme is as follows:

1, in such scheme, the end face of described fusing body has the 3rd metal level, is connected by weld tabs between this 3rd metal level and crown cap.

2, in such scheme, the both ends of the surface of described layer of silica gel have the 4th metal level, and this 4th metal level two ends are connected with the first metal layer, the second metal level respectively.

Because technique scheme is used, the utility model compared with prior art has following advantages:

1. the utility model surface mounting fuse protector, its fusible core is used as the layer of silica gel parcel of arc extinguishing, the electric arc that effectively prevents fuse product under high-pressure situations is revealed, greatly improved the security performance of fuse, layer of silica gel has high-insulativity, high withstand voltage breakdown capability, and its arc extinguishing ability gets a promotion greatly, and the silica gel after modification has certain elasticity, can absorb the energy that fuse produces in fusing process, therefore greatly improve the breaking capacity of fuse.

2. the utility model surface mounting fuse protector, be provided with and for the metal level of welding, therefore greatly improved the reliability that fusible core is electrically connected to crown cap near the fusible core surface that on the inwall of end face certain-length, is not wrapped by arc quenching material and the outer surface of arc quenching material in the termination, manhole of its fusing body.

3. the utility model surface mounting fuse protector, its structure is solid construction, there is high-intensity fusing body the outside, inside is filled with high-performance as the layer of silica gel of arc extinguishing, the unique way that its fusible core is taked is metal fuse on the ceramic fibre, make fuse have more wide application market, particularly use in the environment of the requirements such as high voltage, high reliability.

Description of drawings

Accompanying drawing 1 is existing fuse structure schematic diagram;

Accompanying drawing 2 is the utility model surface mounting fuse protector structural representation.

In above accompanying drawing: 1, manhole; 2, fusing body; 3, ceramic fibre rod; 4, wire; 5, fusible core rod; 6, layer of silica gel; 7, the first metal layer; 8, the second metal level; 9, crown cap; 10, closed chamber; 11, weld tabs; 12, the 3rd metal level; 13, the 4th metal level.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further described:

embodiment: a kind of surface mounting fuse protector, comprise the fusing body 2 that has manhole 1 in the middle of, one ceramic fibre rod 3 is positioned at the manhole 1 of described

fusing body

2, 3 outer surfaces form fusible core rod 5 thereby a wire 4 is wound in described ceramic fibre rod, excellent 5 left sides of this fusible core, has layer of silica gel 6 between zone and fusing body 2 between the right part, the left side of described fusible core rod 5, right part and its end face all have the first metal layer 7, the zone of described manhole 1 inwall and close its end face has the second metal level 8, thereby two crown caps 9 lay respectively at described fusing body 2 two ends and cover its manhole 1 two ends formation closed chamber 10, this crown cap 9 and fusible core rod 5, be filled with a weld tabs 11 between layer of silica gel 6, this weld tabs 11 and the first metal layer 7, be electrically connected between the second metal level 8.

The end face of above-mentioned fusing body 2 has the 3rd metal level 12, is connected by weld tabs 11 between this 3rd metal level 12 and crown cap 9.

The both ends of the surface of above-mentioned layer of silica gel 6 have the 4th metal level 13, and this 4th metal level 13 two ends are connected with the first metal layer 7, the second metal level 8 respectively.

When adopting above-mentioned surface mounting fuse protector, its fusible core is used as the layer of silica gel parcel of arc extinguishing, the electric arc that effectively prevents fuse product under high-pressure situations is revealed, greatly improved the security performance of fuse, layer of silica gel has high-insulativity, high withstand voltage breakdown capability, and its arc extinguishing ability gets a promotion greatly, and the silica gel after modification has certain elasticity, can absorb the energy that fuse produces in fusing process, therefore greatly improve the breaking capacity of fuse; Secondly, be provided with and for the metal level of welding, therefore greatly improved the reliability that fusible core is electrically connected to crown cap near the fusible core surface that on the inwall of end face certain-length, is not wrapped by arc quenching material and the outer surface of arc quenching material in the termination, manhole of its fusing body; Again, its structure is solid construction, there is high-intensity fusing body the outside, inside is filled with high-performance as the layer of silica gel of arc extinguishing, the unique way that its fusible core is taked is metal fuse on the ceramic fibre, make fuse have more wide application market, particularly use in the environment of the requirements such as high voltage, high reliability.

Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow person skilled in the art scholar can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection range of the present utility model.

Claims

1. surface mounting fuse protector, it is characterized in that: comprise the fusing body (2) that has manhole (1) in the middle of, one ceramic fibre rod (3) is positioned at the manhole (1) of described fusing body (2), one wire (4) is wound in described ceramic fibre rod (3) thereby outer surface forms fusible core rod (5), excellent (5) left side of this fusible core, has layer of silica gel (6) between zone and fusing body (2) between the right part, the left side of described fusible core rod (5), right part and its end face all have the first metal layer (7), the zone of described manhole (1) inwall and close its end face has the second metal level (8), two crown caps (9) lay respectively at described fusing body (2) two ends and cover its manhole (1) thereby two ends formation closed chamber (10), this crown cap (9) and fusible core rod (5), be filled with a weld tabs (11) between layer of silica gel (6), this weld tabs (11) and the first metal layer (7), be electrically connected between the second metal level (8).

2. surface mounting fuse protector according to claim 1, it is characterized in that: the end face of described fusing body (2) has the 3rd metal level (12), is connected by weld tabs (11) between this 3rd metal level (12) and crown cap (9).

3. surface mounting fuse protector according to claim 1, it is characterized in that: the both ends of the surface of described layer of silica gel (6) have the 4th metal level (13), and this 4th metal level (13) two ends are connected with the first metal layer (7), the second metal level (8) respectively.