JP5806774B2 - Manufacturing method of high-voltage fuse and casing for high-voltage fuse - Google Patents

Description

  The present invention relates to a high-voltage fuse used in the automobile field, and more particularly to a high-voltage fuse that can be easily manufactured and a casing suitable for such a high-voltage fuse.

  FIG. 6 shows a conventional manufacturing process for manufacturing a high-voltage fuse. 6 (a), (b), (c), and (d) are plan views, and FIGS. 6 (e), (f), (g), and (h) are side views of the drawings. First, the fuse element element 100 having the form shown in FIGS. 6A and 6E is formed by punching a metal plate. Next, as shown by the arrows in FIGS. 6 (a), (b), (c), (e), (f), and (g), both sides of the fuse element element 100 are folded inward, As shown in FIGS. 6C and 6G, three sides of the fuse element element 100 are overlapped. Next, as shown in FIGS. 6D and 6H, the terminal portions 102 are formed by opening the attachment holes 101 on both sides of the fuse element element 100, and the fuse element 103 is completed.

  As shown in FIGS. 6 (g) and 6 (h), the terminal portion 102 of the fuse element 103 has a three-ply structure, so that the work for piling up the three pieces is complicated and troublesome. Therefore, there is a problem that the workability of the work for manufacturing the high voltage fuse is poor.

 Further, as described above, since the terminal portion 102 of the fuse element 103 has a three-layer structure, when the overlap state of the three-layer portion is incomplete and adhesion is poor, The electrical resistance of the terminal portion 102 is increased. For this reason, when the adhesiveness is different for each product, when an overcurrent flows through the fuse element 103, the fusing time variation of the fusing part varies from product to product based on the fact that the adhesiveness is different for each product. In some cases, the size of the fuse becomes undesirably large.

  The present invention has been made in view of the problems of the background art described above, and its purpose is to improve the function by enabling easy manufacture and immediate fusing when an overcurrent flows. An object of the present invention is to provide a high-voltage fuse casing that can be made and a high-voltage fuse using the casing.

  According to the first aspect of the present invention, a casing composed of two casing elements formed by dividing a cylindrical body whose both end faces are closed in the cylinder axial direction has terminal portions of fuse elements respectively protruding from the both end faces. A method of manufacturing a high-voltage fuse that is manufactured by sandwiching and fusing the fuse element so as to cover the fused portion of the fuse element with a cylindrical body portion, and mounting the fuse element on both end faces of the casing element A flat mounting surface, a mating surface portion that is positioned on both sides of the terminal portion of the fuse element in the planar direction and that continues in a step shape from an end portion of the mounting surface, and an end portion of the mating surface portion, respectively, the casing And an inclined alignment surface portion inclined toward the mounting surface, and further, the fuse element is mounted on the mounting surface. The mating surface portion of one casing element and the mating surface portion of the other casing element were divided into two parts so that the tilting mating surface portion of one casing element and the tilting mating surface portion of the other casing element were combined with each other. By assembling both casing elements, the fuse element is manufactured so as to cover the melted portion of the fuse element with the cylindrical portion of the casing.

  The invention according to claim 2 is composed of two casing elements formed by dividing a cylindrical body whose both end faces are closed in the cylinder axis direction, and clamps the terminal portions of the fuse elements respectively protruding from the both end faces. And a casing for a high-voltage fuse that is assembled so as to cover the fusing part of the fuse element with a cylindrical body part, on both end faces of the casing element, a flat mounting surface for mounting the fuse element; Located on both sides of the terminal portion of the fuse element in the planar direction, and extending from the end of the mounting surface in a stepped manner, and extending from the end of the mating surface to the outer periphery of the casing, respectively. The high voltage fuse casing is characterized in that an inclined mating surface portion inclined toward the mounting surface is formed.

  According to the present invention, a deformed material having a thin portion at the center and a thick portion on both sides thereof is cut at predetermined intervals in the longitudinal direction, and a hole or a narrow portion is formed in the thin portion. The fuse element can be easily manufactured by using the thin portion as the fuse blown portion and the thick portion as the terminal portion. Further, since the thick portion of the atypical material is used as it is as the terminal portion of the fuse element, the electrical resistance of the terminal portion of the fuse element of the present invention does not increase compared to the terminal portion of the conventional fuse element. The function as a high voltage fuse is improved.

FIG. 1 is an exploded perspective view of a high voltage fuse casing and a high voltage fuse using the casing according to the present invention. FIG. 2 is a diagram showing a manufacturing process of the fuse element in FIG. FIG. 3 is an external view of the high voltage fuse. FIG. 4 is an external view of the high voltage fuse. FIG. 5 is an external view of the high-voltage fuse. FIG. 6 is a diagram showing a manufacturing process of the background art.

  FIG. 1 shows an exploded perspective view of a high-voltage fuse casing 21 according to the present invention and a high-voltage fuse 1 using the casing. In FIG. 1, 2 indicates a fuse element. The fuse element 2 includes a central fuse blow part 3 and terminal parts 4 on both sides of the fuse blow part 3.

  The fuse blown portion 3 is formed with a plurality of holes 5, is formed with a narrow width, or is formed with a notch so that the electrical resistance of the fuse blown portion 3 is increased so that an overcurrent is generated. When it flows, it is configured so that it can be blown immediately.

  The terminal part 4 is formed to be thicker than the fuse blown part 3, and is provided with an attachment hole 12 for attaching to other parts.

  Next, the manufacture of the fuse element 2 will be described with reference to FIG. First, as shown in FIG. 2, an atypical material 6 is prepared. The odd-shaped material 6 is long and has a shape in which the center in the direction orthogonal to the longitudinal direction is a thin portion 7 and both sides of the thin portion 7 are thick portions 8. The atypical material 6 is formed of a conductive material suitable for manufacturing the fuse element 2.

  Next, by cutting or punching out the deformed material 6 at intervals shorter than the width of the deformed material 6 in the longitudinal direction of the deformed material 6, the center is the thin portion 7 and both sides thereof are The fuse element element 9 of the thick part 8 is formed.

  Next, a plurality of holes 5 or notches are formed in the thin portion 7 of the fuse element element 9 to form the thin portion 7 as the fuse blown portion 3, and a mounting hole 12 is formed in the thick portion 8 to By using the thick portion 8 as the terminal portion 4, the fuse element 2 shown in FIG. 2 is completed. Then, as will be described later, a high voltage is obtained by assembling the casing 21 so as to cover the fuse blown portion 3 of the fuse element 2 so that the terminal portion 4 of the fuse element 2 protrudes outward from both end faces of the casing 21. Fuse 1 is completed.

  Next, returning to FIG. 1, the casing 21 will be described. The casing 21 covers the fuse fusing part 3 of the fuse element 2 and is made of a non-conductive material. The casing 21 is formed in a cylindrical shape with both ends closed by assembling the first casing element 22 and the second casing element 23.

  Hereinafter, specific forms of the casing elements 22 and 23 will be described. Each casing element 22, 23 is composed of an arcuate side portion 24 and end portions 25 provided at both ends of the side portion 24.

  The side portion 24 is formed in a form surrounded by a first mating surface portion 26 and a second mating surface portion 27 provided along the axial direction of the side portion 24.

  The end portion 25 is formed in a form surrounded by a third mating surface portion 28, a fourth mating surface portion 29, a fifth mating surface portion 30, and a sixth mating surface portion 31. Among these, the third mating surface portion 28 and the sixth mating surface portion 31 are, as shown in FIGS. 1 and 3 to 5, fourth mating surface portions 29 located on both sides in the plane direction of the terminal portion 4 of the fuse element 2. Each of the fifth mating surface portions 30 extends in the outer peripheral direction of the casing elements 22 and 23 and is a mating surface inclined with respect to the surface of the terminal portion 4. That is, the mating surface portions on both end faces of the casing 21 are mating surface portions including the inclined mating surface portions 28 and 31 and the other mating surface portions 29 and 30.

  The first mating surface portion 26, the second mating surface portion 27, the third mating surface portion 28, the fourth mating surface portion 29, the fifth mating surface portion 30 and the sixth mating surface portion 31 of the two casing elements 22 and 23 are combined with each other. By assembling the two casing elements 22 and 23 together, a substantially cylindrical casing 21 is completed. Further, a fuse element mounting surface 32 is provided between the fourth mating surface portion 29 and the fifth mating surface portion 30 so that the fuse element 2 can be placed thereon.

  A groove is formed in the first mating surface portion 26, the second mating surface portion 27, the third mating surface portion 28, the fourth mating surface portion 29, the fifth mating surface portion 30 and the sixth mating surface portion 31 of the first casing element 22. On the other hand, the first mating surface portion 26, the second mating surface portion 27, the third mating surface portion 28, the fourth mating surface portion 29, the fifth mating surface portion 30 and the sixth mating surface portion 31 of the second casing element 23 have protrusions. By forming the projection of the second casing element 23 in the groove of the first casing element 22, the connection structure between the first casing element 22 and the second casing element 23 is firmly established. I have to.

  In FIG. 1, 41 and 42 are semicircular holes formed in the first casing element 22, and 43 and 44 are semicircular holes formed in the second casing element 23. By assembling the element 22 and the second casing element 23, the semicircular hole 41 and the semicircular hole 43 form a circular hole 45 for arc-extinguishing sand filling, and the semicircular hole 42 and the semicircular hole 43 are semicircular. A circular hole (not shown) for filling the arc-extinguishing sand is formed by the circular hole 44.

  FIG. 3 shows a state in which a casing 21 is attached to the fuse element 2 so as to cover the fuse fusing part 3 of the fuse element 2. As shown in FIG. 3, the casing 21 covers the fuse fusing part 3 of the fuse element 2, while the terminal part 4 of the fuse element 2 has a structure protruding from both end faces of the casing 21. 3, 4, and 5, R is a fixing ring, and the fixing ring R is a ring for binding the first casing element 22 and the second casing element 23 together.

  As described above, according to the high voltage fuse 1 using the high voltage fuse casing 21 according to the present invention, the thick portion 8 of the deformed material 6 is used as it is to form the terminal portion 4 of the fuse element 2. The following effects can be achieved. That is, since the terminal portions of the conventional fuse element are three-layered, if the overlapping portions are not in close contact with each other with no gap, the electric resistance of the terminal portion increases. For this reason, when the adhesiveness is different for each product, when an overcurrent flows through the fuse element 103, the fusing time variation of the fusing part varies from product to product based on the fact that the adhesiveness is different for each product. In some cases, the size of the fuse becomes undesirably large. However, since the terminal portion 4 of the fuse element 2 of the present embodiment is formed by using the thick portion 8 of the atypical material 6 as it is, the electric resistance of the terminal portion is different from that of the conventional fuse element. There is no possibility that it differs from product to product. Therefore, when an overcurrent flows through the fuse element 2 of the present embodiment, the variation between products can be reduced, and the function as the high-voltage fuse 1 can be satisfactorily performed. Can do.

  Further, according to the present embodiment, when the high voltage fuse 1 is assembled to other parts, it may be necessary to bend the terminal portion 4 as shown in FIG. In such a case, since the terminal part of the fuse element of the prior art has a three-layer structure, when the terminal part is bent, the overlapping parts are easily displaced from each other, and as a result, the terminal part is out of shape. There is a problem that it is difficult to assemble the fuse element 2 to other parts. However, since the terminal portion 4 of the fuse element 2 according to the present embodiment uses the thick portion 8 of the deformed material 6 as it is, there is no possibility that the terminal portion 4 is deformed when the terminal portion 4 is bent. There is an advantage that the element 2 can be easily assembled to other parts.

  FIG. 5 shows a second embodiment. The characteristic of this 2nd Embodiment shows the state by which the attachment hole is not formed in the terminal part 4. FIG. The present invention can also be applied to the second embodiment.

1 High-voltage fuse (present invention)
2 Fuse element 3 Fuse blown portion 4 Terminal portion 21 High voltage fuse casing (present invention)
22 1st casing element 23 2nd casing element 26-31 Groove, protrusion

Claims (2)

A casing composed of two casing elements formed by dividing a cylinder whose both end surfaces are closed into two in the cylinder axis direction,
A method for producing a high-voltage fuse manufactured by assembling a terminal portion of a fuse element protruding from each of both end faces, and assembling so as to cover a fused portion of the fuse element with a cylindrical portion,
On both end faces of the casing element, a flat mounting surface for mounting the fuse element;
Located on both sides of the terminal portion of the fuse element in the planar direction, a mating surface portion that continues in a step shape from the end of the mounting surface,
From the end portion of the mating surface portion, each extending in the outer peripheral direction of the casing, and an inclined mating surface portion inclined toward the placement surface is formed,
Furthermore, the fuse element is placed on the placement surface,
A mating surface portion of one casing element and a mating surface portion of the other casing element,
By assembling both the two divided casing elements in such a manner that the inclined alignment surface portion of one casing element and the inclined alignment surface portion of the other casing element are combined with each other,
A method for manufacturing a fuse for high voltage, wherein the fuse element is manufactured so as to cover a fusing portion of the fuse element with a cylindrical portion of the casing. The cylindrical body whose both end surfaces are closed consists of two casing elements formed by being divided into two in the cylinder axis direction,
A high voltage fuse casing that is assembled so as to sandwich the terminal portion of the fuse element protruding from the both end faces, and to cover the fused portion of the fuse element with a cylindrical portion,
On both end faces of the casing element, a flat mounting surface for mounting the fuse element;
Located on both sides of the terminal portion of the fuse element in the planar direction, a mating surface portion that continues in a step shape from the end of the mounting surface,
A casing for a high-voltage fuse, characterized in that an inclined mating surface portion that extends from the end portion of the mating surface portion in the outer peripheral direction of the casing and is inclined toward the placement surface is formed.

Images