JPH04309873A - Fuse resistance measuring device - Google Patents

Abstract

PURPOSE:To measure the electric resistance value of a fuse in a short time in simple manner without damaging an electric conduction part. CONSTITUTION:In a case 11 in which a fuse 1 is installed in attachable demountable manner, freely the first - fourth contact metal fittings 12a-12d which are press-attached with the first - fourth electric condition parts 1a-1d of the fuse 11 are installed through a spring 13, and a resistance measuring device 2 is electrically connected with these contact fittings 12a-12d.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuse resistance measuring device for easily measuring the electrical resistance value of a fuse.

0002

2. Description of the Related Art FIG. 4 is a perspective view showing an example of a conventional fuse resistance measuring device. In the figure, 1 is a fuse having first to fourth current-carrying parts 1a to 1d, 2 is a resistance measuring device for measuring the electrical resistance value of fuse 1, and 3a
~3d is the resistance measuring device 2 and the first to fourth current-carrying parts 1a~
The first to fourth lead wires 4a to 4d electrically connect the first to fourth lead wires 3 to 1d, respectively.
The first to fourth current-carrying parts 1a provided at the ends of a to 3d.
These are the first to fourth clips that hold ~1d.

Next, a conventional resistance measuring method will be explained. First, the clips 4a to 4d are connected to the resistance measuring device 2 via the lead wires 3a to 3d. Then, the first to fourth clips 4a to 4d are sequentially attached to the first to fourth current-carrying parts 1a to 1d of the fuse 1. When the setting is completed as shown in FIG. 4, the electrical resistance value of the fuse 1 can be read using the resistance measuring device 2.

0004

[Problem to be Solved by the Invention] In the conventional fuse resistance measuring device configured as described above, it is cumbersome because it is necessary to hold the four current-carrying parts 1a to 1d between the respective clips 4a to 4d. To measure with about 3
There are problems in that it takes about 0 seconds and the clips 4a to 4d may damage the current carrying parts 1a to 1d. Furthermore, each clip 4a to 4
There was also a problem that the mounting position of d could be mistakenly replaced, and as a result, the electric resistance value could not be measured accurately.

[0005] The present invention was made to solve the above-mentioned problems, and it is possible to easily measure the electrical resistance value of a fuse in a short time without damaging the current-carrying part, and to The purpose of the present invention is to obtain a fuse resistance measuring device that can prevent connection errors.

[0006]

[Means for Solving the Problems] A fuse resistance measuring device according to the present invention includes a plurality of contact fittings each of which is press-contacted to each current-carrying portion of the fuse in a case in which the fuse is detachably mounted. A resistance measuring device is electrically connected to the contact fitting.

[0007]

[Operation] In this invention, by mounting the fuse in the case, contact metal fittings are brought into pressure contact with each current-carrying part of the fuse, thereby accurately wiring the fuse and the resistance measuring device, and measuring the electrical resistance value of the fuse. Measure.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a fuse resistance measuring device according to an embodiment of the present invention, FIG. 2 is a plan view showing the case of FIG. 1,
FIG. 3 is a side view of FIG. 2, and the same or equivalent parts as in FIG. 4 are designated by the same reference numerals, and their explanation will be omitted.

In the figure, reference numeral 11 denotes a case (wooden type) in which a fuse holder 11a is provided, and the fuse 1 is removably mounted on the fuse holder 11a. Further, the fuse storage space of the case 11 is made larger by 0.2 to 0.3 mm than the size of the fuse 1 so that the fuse 1 can be stored without strain or strain.

[0010] Reference numerals 12a to 12d are first to fourth contact fittings each attached to the inner wall surface of the case 11 by a screw hook method, and each of these contact fittings 12a
-12d are the first to fourth current-carrying parts 1a to 1, respectively.
It is pressed against d. In addition, each contact fitting 12a to 12d
The tip surface (contact surface) of is spherical. Further, each of the contact fittings 12a to 12d is electrically connected to the resistance measuring device 2 via each lead wire 3a to 3d. Reference numeral 13 denotes a spring attached to the case 11 using a screw hook method, and this spring 13 is attached to each of the contact fittings 12a to 12d.
are biased toward the respective current-carrying parts 1a to 1d.

In the fuse resistance measuring device constructed as described above, by simply mounting the fuse 1 on the fuse holder 11a, each contact fitting 1 is attached to each current-carrying portion 1a to 1d.
2a to 12d are pressed into contact with each other, and the electrical resistance value of the fuse 1 is measured by the resistance measuring device 2. Therefore, the time required to measure the resistance of one fuse 1 is about 7 seconds, which is short and easy. Further, since a conventional clip is not used, the fuse 1 is not damaged. Further, since the fuse storage space of the case 11 is manufactured in accordance with the shape of the fuse 1, the fuse 1 will not be installed in the opposite direction, and a connection error with the fuse 1 will be prevented. Further, in the above embodiment, since the tip surfaces of the contact fittings 12a to 12d are spherical, damage to the fuse 1 during attachment and detachment can be more reliably prevented.

[0012] In the above embodiment, the most standard capacity (
Although the case 11 is illustrated for a fuse 1 of size 1), it goes without saying that the case 11 can be used for fuses of other sizes by changing the dimensions of the case 11, spring 13, etc. Further, in the above embodiment, each of the contact fittings 12a to 12d is brought into pressure contact with each of the current carrying parts 1a to 1d by the spring 13, but the contact fittings may be brought into pressure contact with each other by the elastic force of the contact fitting itself, for example.

[0013]

As explained above, the fuse resistance measuring device of the present invention includes a case in which a fuse is detachably mounted, and a plurality of contact fittings that are press-contacted to each current-carrying part of the fuse, respectively. Since a resistance measuring device is electrically connected to these contact fittings, the electrical resistance of the fuse can be easily measured in a short time without damaging the current-carrying parts by simply attaching the fuse to the case. This has the advantage of being able to prevent connection errors.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a fuse resistance measuring device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the case of FIG. 1;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a perspective view showing an example of a conventional fuse resistance measuring device.

[Explanation of symbols]

1 Fuse 1a First energizing part 1b Second energizing part 1c Third energizing part 1d Fourth energizing part 2 Resistance measuring device 11 Case 12a First contact fitting 12b Second contact fitting 12c Third contact fitting 12d Fourth contact fitting

Claims (1)

[Claims] 1. A case in which a fuse is removably attached, a plurality of contact fittings installed in the case and press-contacted to each current-carrying part of the fuse, and electrically connected to these contact fittings. , and a resistance measuring device for measuring the electrical resistance value of the fuse.