JPH08287816A - Fuse holder - Google Patents

Abstract

PURPOSE: To provide a fuse holder requiring a small space for mounting, with good efficiency for the mounting work and safety in wiring even in the case of flowing of a large current. CONSTITUTION: A fuse holder is composed of a metal cylindrical body 2 as well as a resinous cylindrical body 1 and has a tubular fuse 4 in its hollow part 9 formed therein, the body 2 having a screw thread 6 on the outer side thereof. When the holder is screwed into a heat sink 8 or the like by the aid of the thread 6, an electrode 32 at the body 1 is communicated with the sink and thereby connection to an outside circuit can be made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuse holder used in a power supply device or the like which uses a heat sink as an electrode and requires a fuse in a power supply line.

[0002]

2. Description of the Related Art Conventionally, in a power supply device etc. in which a heat sink has been used as an electrode and a fuse has to be inserted in a power supply line, when a fuse is inserted in a circuit, a fuse holder is separately attached and wiring is performed. Connected to each other.

[0003]

By the way, the conventional technique has the following drawbacks.

At the time of mounting, the mounting space is required to support the fuse holder itself, and the device itself becomes large.

[0007] The work efficiency is poor because the number of man-hours for electrical wiring after installation is required.

Since wiring is performed by electric wires, there is a risk of burning when a large current flows.

[0007] Therefore, the technical problem of the present invention is to solve the above-mentioned drawbacks of the prior art, to reduce the installation space, to improve the work efficiency of the installation, etc., and to secure the wiring even when a large current flows. It is to provide a fuse holder.

[0008]

[Means for Solving the Problems] A fuse holder is formed into a tubular body composed of two parts, an upper part and a lower part. The lower part is made of a metal such as nickel and the other is made of a resin or the like. A cavity for accommodating the fuse is formed, and is electrically connected to the tube fuse at the bottom of the cavity of the metal tubular body. Further, the metal tubular body is externally threaded. A cap is attached to the resin tubular body, and an electrode for wiring is attached to the upper part of the cap. The wiring electrode penetrates the cap and is electrically connected to the upper end of the fuse. The metal tubular body of the fuse holder functions as an electrode, and by screwing the fuse holder to the outside, the fuse holder itself can be screwed into a heat sink or the like for mounting, and also electrically connected. As a result, the man-hours for mounting the fuse holder and the man-hours for electrical wiring can be halved.

[0009]

When the electrode is provided on the resin portion of the fuse holder consisting of the metal tubular body and the resin tubular body, and the thread is cut on the outside of the metal tubular body on the opposite side, it is possible to attach it to a heat sink or the like. Can be mounted by screwing the holder itself onto the heat sink. Since the metal part of the screwed holder is electrically connected to the heat sink, and is electrically connected to the electrode on the upper part of the holder through the fuse inside the holder,
At the same time as mounting, it can be electrically connected to an external circuit. Therefore, the man-hours for mounting the fuse holder and the man-hours for electrical wiring can be halved,
The installation space can also be reduced.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic sectional view of an embodiment according to the present invention. The holder itself is tubular in shape,
It is composed of an upper resin tubular body 1 and a lower metal tubular body 2, and a thread 6 is cut on the outer surface of the metal tubular body.
The tubular fuse 4 is inserted into the hollow portion 9 (the portion indicated by the dotted line in the drawing) inside the tubular body composed of the metallic tubular body 1 and the resin tubular body 2. The fuse 4 is electrically connected to the holder at the bottom 7 of the hollow portion of the metal tubular body, and is in contact with the internal electrode 31 on the opposite side, that is, the upper portion in the drawing.
The connection with the outside is made at the portion of the external electrode 32 that is integral with the internal electrode 31 and is exposed to the outside of the resin cylindrical body.

FIG. 2 is a view showing a state in which the screwed cap 5 on the upper portion of the fuse holder is removed. The cap is removed and the hollow portion 9 (shown by a dotted line in the drawing) is filled with a tube. Insert the fuse and then the cap. In this way, the bottom 7 of the hollow portion of the metal tubular body 2 below the holder and the electrode portion 10 at the lower end of the fuse are connected, and the electrode portion 10 at the upper end of the fuse is connected to the internal electrode 31 of the cap.

FIG. 3 shows an electric circuit at that time. The symbols 4, 6, 7, 31, 32 correspond to the symbols in FIG. 2, respectively.

FIG. 4 is a cross-sectional view showing the situation when it is attached to a heat sink or the like. Heat sink 8 etc.
The screw-in electrode type fuse holder of the present invention is screwed in and attached to a fuse that needs to be connected.
Since the screw thread 6 is cut on the outer side of the metal tubular body 2 below the holder, it is attached and fixed by screwing, and at the same time, electrically connected.

FIG. 5 shows an electric circuit at that time. The metal tubular body 2 in the lower part of the holder is connected to the heat sink 8, the fuse 4 is connected to the bottom 7 of the holder cavity, the fuse 4 is connected to the internal electrode 31, and the external electrode 32 is connected to another circuit. .

[0016]

According to the present invention, the number of steps for attaching the fuse holder and the number of steps for electrical wiring can be halved, the installation space can be small, and the device can be downsized. Further, since it is possible to use only a small number of electric wires for wiring, it is possible to provide a screw-in electrode type fuse holder having an advantage that there is less risk of burning when a large current flows.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outline of an embodiment according to the present invention.

FIG. 2 is a front view showing a state in which a cap portion of a fuse holder is removed.

3 is an electric circuit diagram of FIG.

FIG. 4 is a cross-sectional view showing a state where the heat sink and the like are attached.

5 is an electric circuit diagram of FIG.

[Explanation of reference numerals] 1 resin tubular body 2 metal tubular body 31 internal electrode (of fuse holder) 32 external electrode (of fuse holder) 4 tube fuse 5 cap 6 screw thread 7 bottom of cavity (internal contact portion) 8 Heat sink (thing that needs to be connected by fuse) 9 Cavity 10 Electrode of fuse

Claims (1)

[Claims] 1. A fuse holder used by connecting to an electrode, wherein the fuse holder is composed of a metal portion and a resin portion, a threaded portion is provided on the metal portion, and the screwed portion is screwed into the electrode to be fixed and attached. A fuse holder characterized in that it can be electrically connected at the same time.