JP2018129309A - Manufacturing method for fuse, and fuse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for a fuse and the fuse, in which an assembly work can be easily performed.SOLUTION: The invention relates to a manufacturing method of a fuse, a fuse 600 comprises: a fuse element 100 that are formed by a pair of terminal parts 110 and a disconnection part between the terminal parts; a casing 500 that houses the fuse element; and caps 410 and 420 that close an opening part of both ends of the casing. The fuse element is positioned in the casing so that the terminal part of the fuse element is projected from the opening part of casing. Holding plates 310 and 320 for holding the fuse element are inserted between an outer peripheral part 520 of the opening part and contact pieces 131, 132, and 133 provided in the terminal part of the fuse element. Further, the opening part of casing is covered by the caps so as to cover the holding plate.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a fuse mainly used in an electric circuit for automobiles and the like, and more particularly to a method for manufacturing a fuse and a fuse for holding a fuse element in a casing.

  Conventionally, a fuse has been used to protect an electric circuit mounted on an automobile or the like and various electric components connected to the electric circuit. Specifically, when an unintended overcurrent flows in an electric circuit, the fuse element built in the fuse is melted by the heat generated by the overcurrent, preventing excessive current from flowing to various electrical components. doing.

  And this fuse has various kinds according to a use, for example, the fuse of patent documents 1 for protecting from comparatively large overcurrent is known.

  This fuse is of a type in which a fuse element is stretched and held inside a cylindrical casing. Specifically, a cylindrical cover body (casing), a fusible body (fuse element) stretched inside the cover body, and two ends sandwiching both ends of the fusible body at both ends of the cover body, respectively. And a soluble body holding part. And the two soluble body holding | maintenance parts are contact | abutted to the peripheral part of the opening part of the both sides of a cover body in the state which pinched | interposed the both ends of the said soluble body, respectively. As a result, a fusible body (fuse element) is stretched inside the cover body and held so as not to be displaced.

  However, in the fuse of Patent Document 1, the fuse element is accommodated inside the cover, and the end of the fuse element protruding from the opening of the cover is sandwiched between two fusible body holding portions from above and below. Rather, the assembly work becomes complicated.

JP2012-43573

  Accordingly, the present invention provides a method for manufacturing a fuse and a fuse that facilitate assembly of the fuse.

The method for manufacturing a fuse of the present invention includes a fuse element including a pair of terminal portions and a fusing portion between the terminal portions, a casing for housing the fuse element,
And a cap for closing the openings at both ends of the casing, wherein the fuse element is positioned in the casing such that a terminal portion of the fuse element protrudes from the opening of the casing. The holding plate for holding the fuse element is inserted between the peripheral edge of the opening of the casing and the contact piece provided on the terminal portion of the fuse element, and further, so as to cover the holding plate, The opening of the casing is closed with the cap.

  According to the above feature, since the holding plate is configured to be inserted between the contact piece of the fuse element and the peripheral edge of the opening of the casing, the assembling work is facilitated as compared with the prior art.

  Further, in the fuse manufacturing method of the present invention, the fuse element is formed by integrally processing a single metal plate, and the terminal portion of the fuse element is formed by connecting the end of the single metal plate, It is formed by bending and overlapping.

  According to the above feature, since the terminal portion of the fuse element is configured by folding a part of one metal plate, even if it is the same thickness as the conventional terminal portion, compared with the conventional technology, The resistance value of the terminal is small.

  Further, the fuse manufacturing method of the present invention is characterized in that the contact piece is formed by bending a part of the terminal portion so as to rise from the terminal portion.

  According to the above feature, since the contact piece is formed by bending a part of the terminal portion, there is no need to attach a separate contact piece to the terminal portion, and the contact resistance due to the attachment of the contact piece. Does not occur.

  The fuse of the present invention includes a fuse element composed of a pair of terminal portions and a fusing portion between the terminal portions, a casing that houses the fuse element, and caps that block openings at both ends of the casing. The fuse element is located in the casing such that the terminal portion of the fuse element protrudes from the opening of the casing, and the peripheral edge of the opening of the casing and the fuse element A holding plate for holding the fuse element is inserted between the contact piece provided on the terminal portion, and the cap covers the opening of the casing so as to cover the holding plate. It is characterized by being.

  According to the above feature, since the holding plate is configured to be inserted between the contact piece of the fuse element and the peripheral edge of the opening of the casing, the assembling work is facilitated as compared with the prior art.

  Furthermore, the fuse of the present invention is characterized in that the fuse element is composed of a single metal plate, and the terminal portion of the fuse element is configured by folding the end portion of the single metal plate. To do.

  According to the above feature, according to the above feature, since the terminal portion of the fuse element is formed by folding a part of a single metal plate, even if it has the same thickness as the conventional terminal portion, Compared with the technology, the resistance value of the terminal portion is small.

  Furthermore, the fuse of the present invention is characterized in that the contact piece is configured such that a part of the terminal portion rises from the terminal portion.

  According to the above feature, since the contact piece is a part of the terminal portion, it is not necessary to attach a separate contact piece to the terminal portion, and contact resistance due to the attachment of the contact piece does not occur.

  As described above, according to the fuse manufacturing method and the fuse of the present invention, the assembly work of the fuse is facilitated.

(A) is a top view of the fuse element of the fuse which concerns on Embodiment 1 of this invention, (b) is a front view of the said fuse element, (c) is a side view of the said fuse element. FIG. 2 shows a manufacturing process of a fuse element of a fuse according to Embodiment 1 of the present invention, in which (a) is a plan view of the fuse element, (b) is a side view of the fuse element, and (c) is a side view of the fuse element. A plan view, (d) is a side view of the fuse element. FIG. 2 shows a manufacturing process of a fuse element of a fuse according to Embodiment 1 of the present invention, in which (a) is a plan view of the fuse element, (b) is a side view of the fuse element, and (c) is a side view of the fuse element. It is a top view. (A) And (b) is a top view of the holding plate of the fuse concerning Embodiment 1 of this invention, (c) And (d) is a perspective view of the cap of the fuse concerning Embodiment 1 of this invention. (A) is a side view of the casing of the fuse which concerns on Embodiment 1 of this invention, (b) is a top view of the said casing. (A) And (b) is a perspective view which shows the manufacturing method of the fuse which concerns on Embodiment 1 of this invention, (c) is a front view which shows the manufacturing method of the said fuse, Comprising: Both ends are expanded and shown Yes. (A) And (b) is a perspective view which shows the manufacturing method of the fuse which concerns on Embodiment 1 of this invention. (A) is a top view of the fuse element of the fuse which concerns on Embodiment 2 of this invention, (b) is a front view of the said fuse element, (c) is a perspective view which shows the manufacturing method of the said fuse.

DESCRIPTION OF SYMBOLS 100 Fuse element 110 Terminal part 120 Fusing part 131 Contact piece 132 Contact piece 133 Contact piece 310 Holding plate 320 Holding plate 410 Cap 420 Cap 500 Casing 510 Opening part 520 Peripheral part 600 Fuse

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the shape, material, etc. of each member of the fuse in the embodiment described below are merely examples, and are not limited thereto. The “vertical direction” described in the present specification is a direction perpendicular to the longitudinal direction of the fuse element.

(Embodiment 1)
FIG. 1 shows a fuse element 100 which is a component constituting a fuse according to Embodiment 1 of the present invention. The fuse element 100 is formed from a single sheet-like metal plate and includes a pair of terminal portions 110 and a fusing portion 120 positioned between the terminal portions 110. Both ends of the fusing part 120 are connected to the terminal part 110 by a connecting part 122. The terminal portion 110 includes a connection hole 111 penetrating in the vertical direction, an abutment piece 131 and an abutment piece 132 rising from the surface of the terminal portion 110 at a substantially right angle, and a downward direction from the back surface of the terminal portion 110. The contact piece 133 rises at a substantially right angle.

  The fusing part 120 is formed by forming a plurality of small holes 121 in a part of the fuse element 100 having a narrow width. When an unintentional overcurrent flows in an electric circuit or the like, the fusing part 120 generates heat and melts. This is to cut off the overcurrent. Further, the opposing contact pieces 131 are separated by a length L1. Similarly, the opposed contact pieces 132 are separated by a length L1, and the opposed contact pieces 133 are also separated by a length L1.

  Next, a method of integrally forming the fuse element 100 will be described with reference to FIG. First, a flat plate member having a uniform thickness and made of a conductive metal such as copper or an alloy thereof is punched into a shape as shown in FIG. An upper end 112, an intermediate end 113, and a lower end 114 are formed at the end of one metal plate shaped in a predetermined shape as shown in the figure. A fold line X is provided at each boundary between the upper end 112, the intermediate end 113 and the lower end 114. Further, the upper end 112 and the fusing part 120 are connected by a flat connecting part 122.

  Each of the upper end portion 112, the intermediate end portion 113, and the lower end portion 114 is provided with a connection hole 111. As will be described later, the connection holes 111 coincide when the end portions are folded. . Further, a contact piece 131 and a contact piece 132 are provided on the upper end portion 112, and a locking hole 115 penetrating vertically is provided near the boundary with the intermediate end portion 113. Further, a locking claw 116 is provided at a side end portion of the lower end portion 114.

  Next, as shown in FIG. 2B, the contact piece 131 and the contact piece 132 of the upper end 112 are bent upward at a substantially right angle. Further, the contact piece 133 of the lower end portion 114 is also bent at a substantially right angle upward. Further, the intermediate end portion 113 is folded back at the fold line X toward the back surface of the upper end portion 112. Then, the state shown in FIG. As shown in FIG. 2C, the intermediate end portion 113 is folded on the back surface side of the upper end portion 112, and the back surface side of the intermediate end portion 113 appears in the locking hole 115 of the upper end portion 112.

  Next, as shown in FIG. 2 (d), the lower end portion 114 is folded back toward the intermediate end portion 113 at the fold line X. Then, as shown in FIGS. 3A and 3B, the lower end portion 114 is folded over the intermediate end portion 113. Further, the locking claw 116 of the lower end portion 114 protrudes to the side of the locking hole 115 of the upper end portion 112. Next, as shown in FIG. 3B, the locking claw 116 is folded back toward the locking hole 115, and is folded over the back surface of the intermediate end portion 113 that appears in the locking hole 115.

  Thus, the fuse element 100 as shown in FIG. 3C is completed. As described above, the terminal portion 110 is formed by bending and overlapping the upper end portion 112, the intermediate end portion 113, and the lower end portion 114, which are the end portions of one metal plate. Moreover, since the latching claw 116 is engaged with the latching hole 115, the upper end 112, the intermediate end 113, and the lower end 114 can be firmly maintained in a folded state. Further, the contact piece 131, the contact piece 132, and the contact piece 133 are formed by bending so as to rise from the terminal portion 110 at a substantially right angle.

  Next, the holding plate 310 and the holding plate 320, which are parts constituting the fuse according to the first embodiment of the present invention, will be described with reference to FIGS. 4 (a) and 4 (b). First, as shown in FIG. 4A, the holding plate 310 is a thin plate member made of a conductive metal such as copper or an alloy thereof having a circular shape with an outer diameter R1, and is linearly formed in the center thereof. An elongated hole 311 (slit) is formed. The opening width of the long hole 311 is equal to or greater than the thickness of the connecting portion 122 of the fuse element 100, and the tip of the long hole 311 faces the peripheral edge of 310, so that the long hole 311 extends from the tip. Can be inserted into the connecting portion 122.

  Next, the holding plate 320 shown in FIG. 4B has the same configuration as the holding plate 310 except that a through hole 322 is formed. Specifically, the holding plate 320 includes two through holes 322 on both sides of the long hole 321. As will be described later, the through hole 322 is used to put an arc extinguishing agent or the like inside the casing.

  Next, the cap 410 and the cap 420 which are parts constituting the fuse according to the first embodiment of the present invention will be described with reference to FIGS. First, as shown in FIG. 4C, the cap 410 has a hollow cylindrical shape, and the inner diameter thereof is equal to or larger than the outer diameter R1 of the holding plates (the holding plate 310 and the holding plate 320), and The outer diameter of the casing is greater than R3 (see FIG. 5A). Therefore, the cap 410 can close the opening so as to be covered from the outside in a state where the holding plates (the holding plate 310 and the holding plate 320) are in contact with the opening of the casing (see FIG. 7). A straight long hole 412 is provided in the center of the end surface 411 of the cap 410. The long hole 412 has a size that allows the terminal portion 110 of the fuse element 100 to be inserted therethrough. The cap 410 can be made of various materials such as metal and resin.

  Next, the cap 420 shown in FIG. 4D has the same configuration as the cap 410 except that a through hole 423 is formed. Specifically, the cap 420 includes a through hole 423 at a position corresponding to the through hole 322 of the holding plate 320. When the cap 420 is fitted into the opening of the casing, the through hole 423 and the through hole 322 coincide with each other, so that an arc extinguishing agent or the like can be put into the casing from the through hole 423 side through the through hole 322. it can.

  Next, a casing 500 that is a component constituting the fuse according to the first embodiment of the present invention will be described with reference to FIG. The casing 500 has a cylindrical shape with openings 510 at both ends, the inner diameter of the peripheral portion 520 of the opening 510 is R2, and the outer diameter of the peripheral portion 520 is R3 (outer diameter R3> inner diameter R2). Thus, the overall length of the casing 500 is L2. Further, the peripheral edge portion 520 has an annular shape when viewed from the side. The casing 500 can be made of various materials such as ceramic and synthetic resin.

  Hereinafter, a fuse assembly method (manufacturing method) according to Embodiment 1 of the present invention will be described with reference to FIGS.

  First, as shown in FIG. 6A, the fuse element 100 is inserted into the casing 500 from one of the openings 510 of the casing 500, and the terminal portion 110 of the fuse element 100 is inserted from the opening 510 of the casing 500. The position of the fuse element 100 is adjusted so that it protrudes.

  Then, as shown in FIGS. 6B and 6C, from the side of the fuse element 100, the end of the long hole 311 of the holding plate 310 is connected to one side of the fuse element 100 (the back side in the drawing). ). Similarly, from the side of the fuse element 100, the tip of the long hole 321 of the holding plate 320 is inserted into the other connecting portion 122 (front side in the drawing) of the fuse element 100. At this time, as shown in FIG. 6C, the length L <b> 1 between the opposing contact pieces (the contact pieces 131, the contact pieces 132, and the contact pieces 133) is longer than the length L <b> 2 of the casing 500. Therefore, a gap is formed between the peripheral edge portion 520 and the contact pieces (the contact piece 131, the contact piece 132, and the contact piece 133) in the openings 510 on both sides. And each thickness of the holding plate 310 and the holding plate 320 is below the magnitude | size of this clearance gap. Therefore, the holding plate 310 and the holding plate 320 can be respectively inserted into the gaps formed on both sides thereof.

  Then, when the connecting portion 122 is inserted to the rear end of the long hole 311 of the holding plate 310, and similarly, the connecting portion 122 is inserted to the rear end of the long hole 321 of the holding plate 320, the state shown in FIG. Become. As shown in FIG. 7A, since the outer diameter R1 of the holding plate 310 and the holding plate 320 is larger than the inner diameter R2 of the peripheral portion 520 of the casing 500, the holding plate 310 and the holding plate 320 The opening 510 can be closed while contacting the peripheral edge 520.

  Further, the connecting portion 122 of the fuse element 100 is inserted into the long hole 311 and the long hole 321 and engaged with each other, so that the holding plate 310 and the holding plate 320 are assembled to both end sides of the fuse element 100. . The back surfaces of the holding plate 310 and the holding plate 320 are in contact with the peripheral portion 520 of the casing 500, and the front side is the contact piece (the contact piece 131, the contact piece 132, and the contact piece of the opening 510. 133). Therefore, the holding plate 310 and the holding plate 320 are attached to both ends of the casing 500 so that the holding plate 310 and the holding plate 320 are sandwiched between the peripheral portion 520 and the contact piece and cannot move in the longitudinal direction of the casing 500 (longitudinal direction of the fuse element 100). ing.

  Therefore, the fuse element 100 supported on both sides by the holding plate 310 and the holding plate 320 is held in the casing 500 so as not to be displaced in the longitudinal direction. As a result, the fuse element 100 cannot be dropped out of the casing 500 or moved in the casing 500 during future assembly work, so that the workability of the fuse assembly work is improved.

  Thereafter, as shown in FIG. 7A, the cap 410 is fitted to one end (back side in the drawing) of the casing 500 to close the opening 510. Similarly, the cap 420 is fitted on the other end (hand side in the drawing) of the casing 500 to close the opening 510. As a result, the assembly operation is completed, and the fuse 600 is completed as shown in FIG.

  In addition, since the cap 410 is attached so as to cover the holding plate 310, the holding plate 310 is not displaced and does not fall outside. Further, the terminal portion 110 of the fuse element 100 protrudes from the long hole 412 of the cap 410 to the outside. Similarly, since the cap 420 is attached so as to cover the holding plate 320, the holding plate 320 is not displaced or dropped outside. Further, the terminal portion 110 of the fuse element 100 protrudes from the long hole 422 of the cap 420 to the outside. Even when the cap 420 is attached, the through hole 423 of the cap 420 and the through hole 322 of the holding plate 320 overlap each other as shown in FIG. An arc extinguishing agent or the like can be appropriately placed inside 500, and then the through-hole 423 can be closed and sealed by any method.

  Thus, according to the assembly method (manufacturing method) of the fuse 600 of the present invention and the fuse 600 of the present invention, in order to hold the fuse element 100 inside the casing 500, the holding plate (holding plate 310, holding) Plate 320), but this holding plate is configured to be inserted between the contact piece of the fuse element 100 and the peripheral portion 520 of the casing 500. Assembling work becomes easy.

  Specifically, in the prior art, in order to hold the fuse element in the casing, the end of the fuse element is sandwiched between two fusible body holding portions from above and below, so two fuse elements are provided per one side of the fuse. The fusible body holding part is required, and the troublesome work of sandwiching the positions of the fusible body holding parts from above and below is necessary. However, in the present invention, since only one holding plate is prepared per one side of the fuse, the number of parts is reduced, and furthermore, it is only necessary to insert into the gap between the contact piece and the peripheral portion, so that the work is also performed. It will be easy.

  Furthermore, according to the assembly method (manufacturing method) of the fuse 600 of the present invention and the fuse 600 of the present invention, the terminal portion 110 of the fuse element 100 is a part of one metal plate (the upper end portion 112, the intermediate end portion). Since the portion 113 and the lower end portion 114) are configured to be folded, the resistance value of the terminal portion 110 is smaller than that of the conventional technique even if the thickness is the same as that of the conventional terminal portion.

  Specifically, first, the terminal portion of the fuse may have a certain thickness in order to easily connect a terminal connected to an electric circuit or the like to be protected. In the prior art, two fusible body holding portions are sandwiched from above and below the end portion of the fuse element to form an integral terminal portion, and the terminal portion is thickened. However, since the fusible body holding part is separate from the fuse element, a contact resistance is generated between the fusible body holding part and the end of the fuse element. However, in the present invention, the terminal portion 110 of the fuse element 100 is formed by folding a part of one metal plate (upper end portion 112, intermediate end portion 113, and lower end portion 114). Even if the thickness is increased, the end portion is formed of a single metal plate and is electrically integrated, so that a large contact resistance as in the conventional case does not occur.

  Furthermore, the fusible body holding portion of the prior art has both the role of increasing the thickness of the terminal portion of the fuse and the role of holding the fuse element in the casing. However, in the fuse 600 of the present invention, the above two roles are divided into different methods, that is, a method of inserting a holding plate and a method of forming a terminal portion of a fuse element by folding a single metal plate. As a result, it was possible to reduce the number of parts and improve workability compared to the conventional technique, and to reduce the resistance value of the terminal portion as compared with the conventional technique.

  Further, according to the assembly method (manufacturing method) of the fuse 600 of the present invention and the fuse 600 of the present invention, the contact piece is formed by bending a part of the terminal portion 110, so that the separate contact is made. There is no need to attach the piece to the terminal portion 110, and contact resistance due to the attachment of the contact piece does not occur.

  In the above embodiment, the casing 500 has a cylindrical shape, but is not limited thereto. For example, any shape such as a prismatic shape can be used as long as the fuse element 100 can be accommodated therein. Can be adopted. Further, the casing 500 is integrally formed using a cylindrical formwork or the like, but is not limited to this. For example, the casing is divided into two in the longitudinal direction and the fuse element is sandwiched from above and below. Thus, the aspect which accommodates a fuse element inside may be sufficient.

  In addition, the long hole 311 of the holding plate 310 has a slit shape that is cut from the peripheral edge of the holding plate 310 toward the center, but is not limited thereto. Any shape may be adopted as long as a part of the fuse element 100 comes into contact with the holding plate 310 and can support the fuse element 100. However, if it is slit-shaped like the long hole 311 of the holding plate 310, it can be easily inserted from the side into the flat connecting portion 122 of the fuse element 100, guided by the slit (long hole). Further, the long hole 311 and the connecting portion 122 are engaged with each other, and the fuse element 100 is supported without being displaced in the vertical direction.

  Further, the holding plate 310 is circular, but is not limited thereto, and can be inserted between the peripheral edge 520 and the contact piece, and can be in contact with the peripheral edge 520 and the contact piece. In this case, an arbitrary shape such as an elliptical shape or a triangular shape can be employed, and a circular holding plate may be used by connecting two semicircular members to each other. Even if the opening 510 of the casing 500 cannot be completely closed due to the change in the shape of the holding plate 310, the opening 510 is covered by the cap 410, so that the inside of the casing 500 is sealed.

(Embodiment 2)
Hereinafter, a fuse 600A according to Embodiment 2 of the present invention will be described with reference to FIG. The fuse 600A is different from the fuse element 100 shown in FIG. 7 in the shape of the fuse element 100A. However, since the other points are common to the fuse 600, description of the common configuration is omitted.

  As shown in FIGS. 8A and 8B, the fuse element 100A is thick at both ends, and the central portion between both ends is thinner than the thickness at both ends. It consists of a single metal plate. Both end portions thereof are terminal portions 110A provided with connection holes 111A, and have the same thickness as the terminal portions 110 in FIG. In addition, a plurality of small holes 121A are formed in the central portion, which is a fusing part 120A that blocks overcurrent. The boundary between the fusing part 120A and the terminal part 110A is a connecting part 122A, which has the same thickness as the connecting part 122 in FIG. Further, there is a step between the connecting portion 122A and the terminal portion 110A, and the step portion serves as the contact piece 131A. Further, the distance between the opposing contact pieces 131A is the length L1 as in the fuse element 100 of FIG.

  Then, as shown in FIG. 8C, the fuse element 100A is inserted into the casing 500 from any opening 510 of the casing 500, and the terminal portion 110A of the fuse element 100A is inserted from the opening 510 of the casing 500. The position of the fuse element 100A is adjusted so as to protrude.

  Next, from the side of the fuse element 100A, the tip of the long hole 311 of the holding plate 310 is inserted into one of the connecting portions 122A (the back side in the drawing) of the fuse element 100A. Similarly, from the side of the fuse element 100A, the tip of the long hole 321 of the holding plate 320 is inserted into the other (front side in the drawing) connecting portion 122A of the fuse element 100A. Then, the holding plate 310 and the holding plate 320 are attached to both ends of the fuse element 100A, and are inserted between the peripheral portion 520 of the opening 510 and the contact piece 131A of the fuse element 100A. Thereby, the fuse element 100A is held inside the casing 500 so as not to be displaced in the longitudinal direction. Thereafter, in the same manner as shown in FIG. 7, the cap 410 and the cap 420 are fitted into the respective end portions of the casing 500 to close the opening 510, thereby completing the fuse 600 </ b> A.

  According to the assembly method (manufacturing method) of the fuse 600A of the present invention and the fuse 600A of the present invention shown in FIG. 8, in order to hold the fuse element 100A inside the casing 500, the holding plate (holding plate 310, The holding plate 320) is used, but this holding plate is configured to be inserted between the contact piece 131A of the fuse element 100A and the peripheral portion 520 of the opening 510 of the casing 500. There are few components and assembly work is easy.

  In this specification, a plurality of small holes are provided in the center of the fuse element to form the fusing part. However, the present invention is not limited to this, and for example, the thickness of the center of the element is reduced. Also included are those in which a fusing part is formed or a fusing part is formed by depositing a low melting point metal made of tin, lead, silver, nickel, or an alloy thereof in the narrow part of the element.

  Further, the fuse of the present invention and the method of manufacturing the fuse are not limited to the above-described examples, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments. Such modifications and combinations are also included in the scope of the right.

Claims (6)

A fuse element comprising a pair of terminal portions and a fusing portion between the terminal portions;
A casing for housing the fuse element;
A cap for closing the openings at both ends of the casing, and a method of manufacturing a fuse,
Position the fuse element in the casing so that the terminal portion of the fuse element protrudes from the opening of the casing,
Between the peripheral edge of the opening of the casing and the contact piece provided on the terminal portion of the fuse element, a holding plate for holding the fuse element is inserted,
Furthermore, the opening of the casing is closed with the cap so as to cover the holding plate. The fuse element is integrally formed by processing a single metal plate,
2. The method for manufacturing a fuse according to claim 1, wherein the terminal portion of the fuse element is formed by bending and overlapping the end portions of the one metal plate.   The method for manufacturing a fuse according to claim 1, wherein the contact piece is formed by bending a part of the terminal portion so as to rise from the terminal portion. A fuse element comprising a pair of terminal portions and a fusing portion between the terminal portions;
A casing for housing the fuse element;
A cap including a cap for closing openings at both ends of the casing,
The fuse element is located in the casing so that the terminal portion of the fuse element protrudes from the opening of the casing,
A holding plate for holding the fuse element is inserted between a peripheral edge of the opening of the casing and a contact piece provided on a terminal portion of the fuse element,
Furthermore, the cap covers the opening of the casing so as to cover the holding plate. The fuse element is composed of a single metal plate,
The fuse according to claim 4, wherein the terminal portion of the fuse element is configured such that an end portion of the one metal plate is folded.   6. The fuse according to claim 4, wherein the contact piece is configured such that a part of the terminal portion rises from the terminal portion.

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