JPS623883Y2 - - Google Patents

Description

[Detailed Description of the Invention] It is well known that Rittel fuses developed by Rittel Corporation have recently been widely used as automotive fuses.

On the other hand, in the automobile industry, the number of wiring circuits is increasing due to measures against exhaust gas and the installation of various electrical components.
The number of circuits has increased to 300 to 400, but in order to simplify the work of assembling the wire harnesses that make up the circuits, there is a tendency to assemble junction boxes containing relays, fuses, computers, etc. in various parts of the wire harnesses. The Littel fuse mentioned above is also beginning to be used in this juncture box.

By the way, this littelfuse is shown in Figure 1a,
As shown by the symbol F in b, ABS resin (resin made of acrylonitrile, butadiene, and styrene)
A thin-walled fusing portion 2 and a pair of thick-walled terminal portions 3 connected to the fusing portion 2 are integrally buried in a molded case 1, and a portion of the terminal portion 3 extends outward from the bottom of the case 1. It is tightened to form a connection tab 4.

Therefore, in order to connect this Littel Fuse F to a wiring board, bus bar, electric wire, etc. in the junction box, an intermediate connecting tab 4 to be connected to the connecting tab 4 of Fuse F is used as shown in Figure 1a and b. Connector housing H that accommodates connector C
This has the disadvantage of creating a bulky junction box, and in reality, each manufacturer is particularly concerned about this point (Figure 1 shows the connection with the electric wires, but the bus bar For connection with other devices, use a connector whose connecting portion is integrally formed vertically symmetrically in place of connector C).

Currently, due to space constraints, we have no choice but to adopt a method that ignores maintenance and directly solders the connection tabs 4 of Littel Fuse F to wiring boards, busbars, and electric wires, omitting the intermediate connection connector C. It is in.

The present invention was developed focusing on the above-mentioned points, and provides a small fuse that can be easily connected to a wiring board, bus bar, electric wire, etc. in a junction box without requiring an intermediate connector. It is something that

Next, the present invention will be explained based on embodiments shown in the drawings.

A second diagram showing a three-dimensional view of a small fuse according to the present invention.
Reference numeral F ₁ in Figure 3 showing the diagram and external view of the fuse.
As shown in , a thin-walled fusing section 12 and a pair of thick-walled terminal sections 13 connected to the fusing section 12 are integrally buried in a case 11 made of ABS resin.
A pair of connecting tabs 1 facing each other with a part of the connecting tabs 3 slightly extending from both end surfaces in the longitudinal direction of the case 11.
4 and 14 are formed. Note that a chamfered portion 15 is formed below the connection tab 14 in consideration of assembly.

In order to connect this small fuse F ₁ to a wiring board, bus bar, electric wire, etc. in the junction box, a hole 17 into which the small fuse F ₁ can be inserted is formed at a desired position on the wiring board 16, as shown in FIG. 4a. The end portion 18 of the copper foil wiring is formed on the inner surface of the hole 17.
or by attaching a separate elastic terminal plate 19 to the end of the copper foil wiring by soldering or the like as shown in FIG. ₁ is inserted, and electrical connection and elastic retention are made with the end faces of connection tabs 14 extending a minute length from both sides of the case 11.

As described above, since the small fuse of the present invention has a configuration in which the connection tabs extend slightly from both opposing sides of the fuse case, electrical connections are made in a manner that they are fitted into the wiring board, and elastic Therefore, the portion of the wiring board exposed above is extremely small, and the height of the junction box can be reduced. Furthermore, since an intermediate connector can be omitted, the cost is reduced, and since it is a plug-in type, maintenance is improved compared to conventional fuses, which has great practical effects.

[Brief explanation of drawings]

FIG. 1 shows a known Rittel fuse and a state in which the fuse is connected to an electric wire via an intermediate connector, and FIG. 1A is a front view and FIG. 1B is a side view.
FIG. 2 is a three-dimensional view of an embodiment of a small fuse according to the present invention, and FIG. 3 is an external view of the same. Figure 4 a, b
2 shows two embodiments of connecting the small fuse according to the present invention to a wiring board. F ₁ ...Small fuse, 11...Fuse case, 12...Fusing section, 13...Terminal section, 14...
Connection tab.

Claims (1)

[Scope of utility model registration request] A fusing part and a terminal part connected to both ends of the fusing part are embedded in a case made of synthetic resin, and the terminal part is made to extend a minute length from both opposing sides of the case to form a pair of connection tabs. A plug-in type fuse, characterized in that the end face of the connecting tab is a press-fit contact portion to opposing input/output ends of a printed circuit board conductor.