TWM517406U - Surface-mounting fuse - Google Patents

Description

Surface mount fuse

This work is about the field of fuses, especially one that uses surface mount technology.

Generally, a fuse is also called a fuse and a fuse. It is a disposable component that is connected to an electronic circuit to protect a circuit. When the current on the circuit is too large, the metal wire or the metal piece therein is heated and blown. And cause an open circuit to interrupt the current to protect the circuit from damage.

Conventional fuses are mostly connected with pins on both ends, so that the fuses are inserted into the circuit board with the perforations pre-set by two pins, and the two pins are soldered and fixed. However, this method of operation is not only time-consuming and laborious, but also prone to poor quality.

Today's surface-adhesive (SMD) fuses are mostly square or rectangular, so that the materials, manufacturing, and assembly costs of each component are high, and the external moisture easily penetrates into the fuse, which affects the fuse quality and service life. And security. Therefore, how to solve the above problems is the subject of research that the relevant industry players are eager to study.

The purpose of this creation is to provide a surface-adhesive fuse that is more convenient for manufacturing and processing, reduces size specifications, is suitable for automated mass production, reduces costs, and combines The explosion-proof layer is sealed and marked with color code to prevent moisture from penetrating into the fuse, which can improve fuse quality, service life and safety.

In order to achieve the above, the surface-adhesive fuse of the present invention comprises: a ceramic tube which is a hollow circular tube body having a tube hole communicating with both ends; a fuse material having a fusible link The fuse material penetrates through the tube hole of the ceramic tube and has a connecting portion at each end; the two conductive caps are each formed into a hollow circular cap body, and each of the two conductive caps has a circular cap opening to The sleeve is wrapped around the two ends of the ceramic tube and electrically connected to the connecting portion at both ends of the fuser; an explosion-proof layer is coated and bonded to the outer periphery of the ceramic tube, and is sealed and sealed at both ends of the explosion-proof layer. The circumference of the circular cap of the two conductive caps.

In the above surface-adhesive fuse, the connecting portions at both ends of the fuse are bent outward to be placed on both end surfaces of the ceramic tube.

In the above surface-adhesive fuse, the inner and outer surfaces of the two conductive caps are provided with a tin-plated layer, and a fusible conductor is connected to each of the two conductive caps to cover the two joints of the fuse material and the ceramic. Both ends of the tube.

In the above surface-adhesive fuse, the fusible conductor is set as a tin plate.

In the above surface-adhesive fuse, the outer periphery of the explosion-proof layer of the ceramic tube is coated with a plurality of color codes to represent the voltage and current specifications of the fuse.

In the above surface-adhesive fuse, the ceramic tube and the outer surface of the conductive cap at both ends of the explosion-proof layer are provided with a final plating layer.

1‧‧‧Ceramic tube

11‧‧‧Circular body

12‧‧‧ tube hole

2‧‧‧Fuse material

21‧‧‧Connecting Department

3‧‧‧ Conductive cap

31‧‧‧ Round Cap

32‧‧‧round hat

33‧‧‧ tin plating

34‧‧‧Film plating

4‧‧‧Fusible conductor

5‧‧‧Explosion layer

6‧‧‧ color code

The first figure is a perspective view of a surface-adhesive fuse of the present embodiment; the second figure is a cross-sectional exploded view of a part of the surface-adhesive fuse of the first figure; the third figure is a preliminary combination of a part of the surface-adhesive fuse part of the second figure. Stereogram The fourth figure is a cross-sectional view of the combination of the components of the surface-adhesive fuse of the third figure; the fifth figure is a perspective view of the combination of the components of the surface-adhesive fuse of the fourth figure; the sixth figure is the connection of the surface-attached fuse of the fourth figure. A cross-sectional view of the layer; the seventh figure is a perspective view of the surface-attached fuse coated explosion-proof layer of the sixth figure; the eighth figure is a cross-sectional view of the surface-attached fuse of the sixth surface of the surface of the explosion-proof layer; the ninth figure is the continuation Figure 8 shows a schematic diagram of the surface-attached fuse in the conductive cap.

For the purpose of achieving the above objectives, the technical means and its functions, the feasible embodiments are described, and the following description is given as follows: First, please refer to the first to eighth figures, the surface adhesion of the creation The fuse comprises a ceramic tube 1, a fuse material 2, two conductive caps 3, two fusible conductors 4, an explosion-proof layer 5 and a complex color code 6, wherein: the ceramic tube 1 (see the second, third and fourth figures) The hollow tube 11 is hollow, and the ceramic tube 1 has a tube hole 12 communicating with both ends in the axial direction.

The fuse material 2 (refer to the second, third and fourth figures) is fusible, the fuse material 2 is inserted through the tube hole 12 of the ceramic tube 1, and the connecting portion 21 is formed at each end, and the fuse material 2 is The connecting portions 21 of the ends are each bent outwardly to be placed on both end surfaces of the ceramic tube 1.

The two conductive caps 3 (see FIGS. 1 to 4) are each a hollow copper cap 31, and the inner and outer surfaces of the two conductive caps 3 can each be provided with a tin plating layer 33, two conductive caps. Each of the three has a circular cap 32 which is sleeved to cover both ends of the ceramic tube 1.

The two fusible conductors 4 (see Figures 2, 3 and 4) can be set as tin sheets. The two fused conductors 4 are connected to the two connecting portions 21 of the fuse material 2 and the two ends of the ceramic tube 1 by heat and pressure. The fusion conductors 4 are electrically connected to the connecting portions 21 of the two conductive caps 3 and the two ends of the fuse material 2 .

The explosion-proof layer 5 (refer to the first, sixth and seventh figures) is set as an explosion-proof paint, is coated and coated and bonded to the outer periphery of the ceramic tube 1, and is sealed and bonded to the two conductive caps 3 by the two ends of the explosion-proof layer 5 Round hatch 32 circumference.

The complex color code 6 (see FIGS. 1 and 8) is applied to the outer periphery of the explosion-proof layer 5 of the ceramic tube 1 to represent the voltage and current specifications of the fuse.

In addition, among the surface-adhesive fuses of the present invention, the ceramic tube 1 and the conductive cap 3 are generally rounded, which is more convenient for manufacturing and processing, reduces the size specification, is suitable for automatic mass production, reduces cost, and is combined with the explosion-proof layer 5 Seal and mark color code 6 to prevent moisture from penetrating into the fuse, which can improve fuse quality, service life and safety. In addition, as shown in the ninth figure, the ceramic tube 1 and the explosion-proof layer 5 and the conductive cap 3 form a sealing structure with each other, so that the outer surface of the two conductive caps 3 may be provided with a final plating layer 34 to improve solderability and Surface treatment effect.

The above embodiments are only used to facilitate the description of the present invention, and are not intended to be limiting, and all kinds of simple changes and modifications that can be made by those skilled in the art without departing from the spirit of the present invention should still be included in the following patent applications. In the scope.

1‧‧‧Ceramic tube

11‧‧‧Circular body

12‧‧‧ tube hole

2‧‧‧Fuse material

21‧‧‧Connecting Department

3‧‧‧ Conductive cap

31‧‧‧ Round Cap

32‧‧‧round hat

33‧‧‧ tin plating

4‧‧‧Fusible conductor

5‧‧‧Explosion layer

6‧‧‧ color code

Claims (6)

A surface-adhesive fuse comprising: a ceramic tube, which is a hollow circular tube body having a tube hole communicating at both ends; a fuse material having a fusible property, the fuse material penetrating through the ceramic a tube hole of the tube, and a connecting portion at each end; the two conductive caps are each a hollow circular cap body, and the two conductive caps each have a circular cap opening, and are sleeved and covered on the ceramic tube The two ends are electrically connected to the connecting portions at both ends of the fuser; an explosion-proof layer is coated and bonded to the outer periphery of the ceramic tube, and the circular cap of the two conductive caps is sealed and sealed at both ends of the explosion-proof layer Periphery. The surface-adhesive fuse according to claim 1, wherein the connecting portions at both ends of the fuse are bent outward to be placed on both end surfaces of the ceramic tube. The surface-adhesive fuse according to claim 1, wherein the inner and outer surfaces of the two conductive caps are provided with a tin-plated layer, and a fusible conductor is connected to each of the two conductive caps to be coated and bonded. The two connecting parts of the fuse material and the two ends of the ceramic tube. The surface mount type fuse according to claim 3, wherein the fusible conductor is a tin sheet. The surface-adhesive fuse according to claim 1, wherein the outer circumference of the explosion-proof layer of the ceramic tube is coated with a plurality of color codes to represent the voltage and current specifications of the fuse. The surface mount type fuse according to claim 1, wherein the ceramic tube and the outer surface of the conductive cap at both ends of the explosion-proof layer are provided with a final plating layer.