JPH04131845U - card type fuse - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce costs by increasing the density of fuse circuits. [Structure] A punched body 9 is used, which is formed by punching a metal plate using a press. In this punched and formed body 9, a fusible portion 11 having a reduced area is provided in a specific one of three or more branch pieces 10 arranged in parallel. The branch piece 10 without the fusible portion 11 is used as a lead piece. A fuse circuit is formed by appropriately connecting these branch pieces 10 with connection pieces 12. The punched molded body 9 is housed in a common resin cover 13 so that each branch piece 10 can be connected to the outside.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is a card-type fuse suitable for mounting, for example, in an automobile electrical junction box. It is related to.

0002

[Conventional technology]

Conventionally, the fuses 1 installed in the electrical junction box of an automobile are arranged in a pair as shown in Fig. 15. The upper ends of the terminal pieces 2 are connected by the fusible part 3, and the upper ends of these terminal pieces 2 and the fusible part 3 are It had a structure in which it was housed within a resin cover 4. Such a fuse 1 is installed in an electrical connection box It was connected to the terminal portion 5a of the bus bar 5 via a female relay terminal 6.

0003 Since such a fuse 1 has only one fusible part 3, a blown fuse It is easy to maintain since only 1 needs to be replaced.

0004

[Problem that the idea aims to solve]

However, with such a conventional fuse 1, the frequency of melting in actual use is low. The current situation is that the benefits are not fully utilized.

[0005] In addition, each fuse 1 is large, so the fuse box is large. There was a problem with modeling.

[0006] Furthermore, since each fuse 1 is independent, a large number of fuses are required. There was a problem in that the cost was high when used for applications such as electrical connection boxes.

[0007] The purpose of this invention is to create a card-type fuse that can increase density and reduce costs. The aim is to provide the

[0008]

[Means to solve the problem] The structure of the present invention that achieves the above object is as follows.

[0009] The card-type fuse according to claim 1 includes a stamped and formed body of a metal plate; The molded body has three or more branch pieces arranged side by side with a fusible part with a small cross-sectional area. , and these branch pieces are connected by a connecting piece to form a fuse circuit. The punched molded body is covered with a resin cover so that each of the branch pieces can be connected to the outside. It is characterized by being stored inside.

0010 The card-type fuse according to claim 2 includes a stamped and formed body of a metal plate, and The molded body has three or more branch pieces arranged side by side with a fusible part with a small cross-sectional area. , and these branch pieces are connected by a connecting piece to form a fuse circuit. The above-mentioned punching and molding is performed on a printed circuit board having the same circuit pattern as the fuse circuit. The body is laminated with corresponding parts overlapping each other, and the printed circuit board has a Corresponding openings are provided, and each branch piece is provided with a corresponding opening on the printed circuit board. The punched molded body is connected to the turn part by soldering or conductive adhesive. The special feature is that each branch piece is housed inside the resin cover so that it can be connected to the outside. be a sign.

[0011]

[Effect]

The card-type fuse according to claim 1 is a stamped molded body constituting a fuse circuit. Since the structure has a fusible part in each of three or more branch pieces, it has a high density. Ru. Therefore, it is possible to install the required number of fusible parts in a smaller space than before. can. Further, the punched molded body can be easily manufactured by punching with a press or the like. Furthermore , Since the punched molded body is incorporated into the insulating cover, the punched molded body is divided into two parts. However, even if the

0012 In the card type fuse according to claim 2, the punched molded body is formed into a circuit pattern of a printed circuit board. Since the turns are overlapped and connected by soldering or conductive adhesive, the current capacity is reduced. can be raised.

[0013]

【Example】

1 and 2 show a first embodiment of a card-type fuse according to the present invention. be. This embodiment shows an example in which the present invention is applied to the fuse circuit 7 shown in FIG. It is something.

[0014] The card type fuse 8 of this embodiment is made of a suitable metal plate such as zinc alloy or copper alloy. A punched body 9 is provided which is punched and formed by a press. The punched molded body 9 is , to reduce the cross-sectional area of a specific one of three or more branch pieces 10 arranged in parallel in one plane. A fusible part 11 is provided, and the branch piece 10 not provided with the fusible part 11 is used as a lead piece. By connecting these branch pieces 10 with connecting pieces 12 as appropriate, the The fuse circuit 7 is formed as a fuse circuit 7. The punched molded body 9 has a shape so that it can be connected to the outside. The tips of each branch piece 10 are exposed and housed in a common resin cover 13. . The resin cover 13 has windows 14 and 15 corresponding to the circuit forming part and the fusible part 11. It is provided. The resin cover 13 is made of polysulfone, nylon, polybutylene. It is formed from resin such as terephthalate by insert molding or molding. A reverse insertion prevention rib 16 is provided on the side surface of the resin cover 13.

[0015] Such a card type fuse 8 has the tip of each branch piece 10 electrically connected, for example. Connect to each connector terminal on the connection box.

[0016] 4 and 5 show an example of a method for manufacturing the card-type fuse 8 described above. It is.

[0017] (A) A punched molded body 9 shown in FIG. 4(A) is formed.

[0018] (b) A resin cover 13 is placed on the punched molded body 9 as shown in FIG. Konoto The resin cover 13 is provided with a window 14 for forming a circuit and a window 15 for forming a fusible part. .

[0019] (c) Using the circuit forming window 14, cut the connecting piece 12 as shown in FIG. 4(B). Then, the punched molded body 9 is divided into three parts.

[0020] (d) Using the window 15 for forming the fusible part, as shown in FIG. 4(C), the specific branch piece 1 is 0 is cut according to the fuse capacity to form the fusible portion 11.

[0021] Thus, a circuit as shown in FIG. 1 having a fuse circuit 7 as shown in FIG. A hard type fuse 8 is obtained. In this case, using the punched molded body 9 of FIG. 4(A) Since the cutting operation shown in Fig. 4(B) is performed after applying the resin cover 13, the adjacent branch pieces Products that maintain the required dimensional accuracy of 10 to 10 can be easily manufactured.

[0022] FIG. 6 shows another example of the method for manufacturing the card-type fuse 8 described above. Ru. In this example, the punching and forming body 9 shown in FIG. 4(B) is used. This shows an example in which the body 9 is covered with a resin cover 13 as shown in FIG. this place In this case, the punched molded body 9 is separated in advance, so the window 14 for forming the circuit is not required. It is.

[0023] FIG. 7 shows a second embodiment of the card-type fuse 8 according to the present invention. In this embodiment, the protective cover 17 is opened via the hinge 18 over the window 15 for forming the fusible part. It is set up so that it can be closed freely. In this case, the fusible portion 11 of the protective cover 17 cannot be seen through. It is preferable to use a transparent resin so as to be transparent.

[0024] FIG. 8 shows a third embodiment of a card-type fuse 8 according to the present invention. In this embodiment, the branch piece 10 and the connecting piece 12 are arranged in the circumferential direction of the square resin cover 13. This shows an example of protruding in three directions. In this embodiment, the connecting piece 12 is a lead piece. It is used as

[0025] FIG. 9 shows a fourth embodiment of a card-type fuse 8 according to the present invention. In this embodiment, only one side of the tip of the branch piece 10 is exposed from the resin cover 13. This is what is shown.

[0026] FIG. 10 shows a fifth embodiment of the card-type fuse 8 according to the present invention. . In this embodiment, two sets of upper and lower punched bodies 9 are used, and these punched bodies 9 are Each branch piece 10 of the upper punched molded body 9 overlaps with the edge plate 22 in between, and its tip end Bend it into a step shape and line it up on the same plane as each branch piece 10 of the lower punched molded body 9. The end of each branch piece 10 is made so that these punched bodies 9 can be connected to the outside. This shows an example in which the ends are exposed and housed in a common resin cover 13.

[0027] If the structure is such that a plurality of punched molded bodies 9 are laminated with insulating plates 22 interposed therebetween, , it is possible to further increase the density of the card-type fuse 8, and to reduce costs. can do FIGS. 11(A) and 11(B) show a sixth embodiment of a card-type fuse 8 according to the present invention. It is something that In this embodiment, at the tip of each branch piece 10 of the punched molded body 9, With the relay terminal 6 inserted and connected, these punched molded bodies 9 and the relay terminal 6 are connected. The punched molded body 9 is connectable to the outside via the relay terminal 6, and a common resin cover is used. An example is shown in which the bar 13 is housed. Therefore, in this example, the resin cover A connection port 23 is provided on the side surface of the bar 13 to correspond to the insertion port for each relay terminal 6.

[0028] 12 and 13 show a seventh embodiment of the card-type fuse 8 according to the present invention. It is something. In this embodiment, the circuit pattern 19 has the same pattern as the punched molded body 9. is provided on the printed circuit board 20. Moreover, for the fusible portion 11 of the punched molded body 9, Openings 21 are provided in corresponding portions of the printed circuit board 20, respectively. This way On the printed circuit board 20, a punched molded body 9 is superimposed on the circuit pattern 19. It is located. In this state, the fusible portion 11 is arranged corresponding to the opening 21. . The punched molded body 9 is connected to the circuit pattern 19 by soldering or conductive adhesive. integrated. The printed circuit board 20 and the punched molded body 9 are as follows: Each branch piece 10 is surrounded by a resin cover 13 except for one side on the tip side and the window 15. Ru.

[0029] When the punched molded body 9 and the printed circuit board 20 are integrated in this way, a large current can be generated. A fuse group with capacitance can be formed.

[0030] FIG. 14 shows an eighth embodiment of the card-type fuse 8 according to the present invention. . In this embodiment, a tie having a printed circuit board 20 as shown in FIGS. 10 and 11 is used. This figure shows an example in which the end of each branch piece 10 protrudes outside the resin cover 13. be.

[0031]

[Effect of the idea]

As explained above, the card type fuse according to the present invention has the following effects. You can get results.

[0032] The card-type fuse according to claim 1 is a stamped molded body constituting a fuse circuit. Since the structure has a fusible part in each branch piece, it has a high density. Therefore, the required number of fusible parts can be installed in a smaller space than in the past. Ma In addition, the punched molded body can be easily manufactured by punching with a press or the like. Furthermore , Since the punched molded body is assembled in a common resin cover, the punched molded body Even if they are divided, they can be handled as a whole.

[0033] In the card type fuse according to claim 2, the punched molded body is formed into a circuit pattern of a printed circuit board. Since the turns are overlapped and connected by soldering or conductive adhesive, the current capacity is reduced. can be raised.

[Brief explanation of drawings]

FIGS. 1A and 1B are a plan view and a left side view of a first embodiment of a card-type fuse according to the present invention.

FIG. 2 is a plan view of the punched product used in FIG. 1.

FIG. 3 is a fuse circuit diagram of the stamped body shown in FIG. 2;

4(A), (B), and (C) are manufacturing process diagrams of the punched molded body shown in FIG. 2. FIG.

FIG. 5 is a plan view showing an example of the manufacturing process of the card-type fuse shown in FIG. 1;

6 is a plan view showing another example of the manufacturing process of the card type fuse shown in FIG. 1. FIG.

FIG. 7 is a perspective view of a second embodiment of the card-type fuse according to the present invention.

FIG. 8 is a plan view of a third embodiment of the card-type fuse according to the present invention.

FIG. 9 is a perspective view of a main part of a fourth embodiment of a card-type fuse according to the present invention.

FIG. 10 is an exploded perspective view of a fifth embodiment of the card-type fuse according to the present invention.

FIG. 11(A) is a perspective view showing the internal structure of a sixth embodiment of the card-type fuse according to the present invention, and FIG. 11(B) is a perspective view of the sixth embodiment of the card-type fuse according to the present invention.

FIG. 12 is a perspective view of the manufacturing process of a seventh embodiment of the card-type fuse according to the present invention.

FIG. 13 is a perspective view of a seventh embodiment of a card-type fuse according to the present invention.

FIG. 14 is a perspective view of an eighth embodiment of the card-type fuse according to the present invention.

FIG. 15 is a perspective view of a conventional fuse connection process.

[Explanation of symbols]

7... Fuse circuit, 8... Card type fuse, 9... Punching molded body, 10... Branch piece, 11... Fusible part, 12... Connection piece,
13... Resin cover, 14, 15... Window, 16... Reverse insertion prevention rib, 17... Protective cover, 18... Hinge, 19... Circuit pattern, 20... Printed circuit board, 21... Opening, 22... Insulating plate, 23... Connection mouth.

Claims (2)

[Scope of utility model registration request] Claim 1: A punched and molded body of a metal plate, the punched and molded body is provided with a fusible portion having a small cross-sectional area in three or more branch pieces arranged side by side, and these branch pieces are connected pieces. A card-type fuse, characterized in that the punched molded body is housed in a resin cover so that each of the branch pieces can be connected to the outside, and is formed into a fuse circuit by being connected. 2. A stamped and molded body of a metal plate, the punched and molded body is provided with a fusible portion having a small cross-sectional area in three or more branch pieces arranged side by side, and these branch pieces are connected pieces. When connected, a fuse circuit is formed, and the stamped molded bodies are stacked with corresponding parts overlapping each other on a printed circuit board having the same circuit pattern as the fuse circuit, and the printed circuit board has a circuit board having corresponding parts corresponding to the fusible parts. each branch piece is connected to a corresponding pattern part of the printed circuit board by soldering or a conductive adhesive, and the punched molded body is configured such that each branch piece can be connected to the outside. A card-type fuse characterized by being housed inside a resin cover.