JPS593810B2 - Blade type fuse - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of a blade type fuse.

Conventionally, this type of fuse has a pair of connection terminals 2,
2 is inserted and attached, and a fusible conductor 3 is interposed between them.

This fuse is widely used in electrical connection boards in traveling equipment such as automobiles because it has superior impact resistance and the like compared to cylindrical fuses (those with glass protection tubes).

Therefore, in actual use, a standard mark such as 5.10.15A is attached to the head 1b of the case 10 to prevent incorrect insertion of the fuse.

However, with the conventional method, it is necessary to prepare many types of fuses with different current capacities, and even though the specifications are indicated on the head of the case, the sizes are uniform, so workers may accidentally There was a risk of it being inserted.

The present invention was made in order to solve the above-mentioned situation, and is the only type of fuse that has multiple fusible conductors, which avoids the trouble of conventional multi-product manufacturing and allows for the production of extra material as needed. The molten conductor is cut to match the rated current, and it also prevents incorrect insertion of fuses with different capacities.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
is a blade fuse, B is an electrical connection board such as a fuse box, and the connection board B is provided with guide frames 5, 5 on both ends of the fuse insertion port 40.

On the other hand, the fuse A has a pair of connection terminals 7, 7 inserted into the body portion 6a of the plastic fuse case 6.

The above is the same configuration as the conventional one, but in the present invention,
The middle part 6b of the body part 6a is bulged, and inside the middle part 6b, the connecting terminals 7, 7 extend in a direction intersecting with the direction of insertion of the fuse, have an appropriate interval in the direction of insertion, and coincide with the direction of insertion. A plurality of soluble conductors 8 are provided.

In the case of the figure, four fusible conductors 8 of 5A standard are strung together, but this is done considering the common value in the field of use.
The number and specifications can be changed.

On the other hand, on the electric connection board B, facing the fuse insertion port 4,
A fusible material cutting rib 9 is provided in a protruding manner.

This cutting rib 9 has a thickness such that it enters the body intermediate portion 6b of the case 6, and has an edge 99a on its upper end surface.
A cutting groove 9b for the soluble conductor is formed, and a portion of the cutting groove 9b except for the cutting groove 9b is formed as an inclined surface 9c to avoid unnecessary contact with the soluble conductor 8.

The height h of the cutting rib 9 up to the cutting groove 9b is determined in advance for each fuse insertion port 4 according to the cutting position of the plurality of fusible conductors 8, that is, the number of fusible conductors 8 to be left after cutting. This is determined in advance and is integrally formed when molding the case etc. of the electrical connection board.

In the above configuration, by completely inserting the fuse A into the fuse insertion port 4 of the electrical connection board B, the fusible conductor 8 is cut into two by the cutting rib 9, and two remain and one
It will be used as 0A standard.

Further, unless the cutting rib 9 is provided protruding from the fuse insertion opening 4, the fuse A is always used as a 2OA standard.

Note that the cutting ribs 9 may be provided on both sides of the fuse insertion port.

Since the present invention is as described above, the standard of the fuse is defined by the height of the cutting rib when inserted into the electrical connection board, so insertion of the fuse can be reliably prevented. This type of fuse is reliably prevented from being inserted, and for example, one type of fuse can be used with different specifications within the range of 5 to 20A, which eliminates the trouble of manufacturing a wide variety of fuses as in the past. have

[Brief explanation of the drawing]

Figures 1A and 1B show a conventional example; Figure 1A is a partially cutaway side view thereof, Figure 1 is a plan view thereof, and Figure 2 is a perspective view showing an embodiment of the present invention. A...Blade type fuse, 6...
Scolding use case, 7... Connection terminal, 8...
...Flutable conductor.

Claims (1)

[Claims] 1 Between a pair of connection terminals of a blade type fuse, a plurality of fusible conductors are provided extending in a direction intersecting the insertion direction of the blade type fuse, provided with appropriate intervals in the insertion direction, and aligned with the insertion direction, A cutting rib is provided protrudingly facing the fuse insertion port of the connection board, the cutting rib is opposed to the soluble conductor, and the soluble conductor of the desired water is cut according to the height of the cutting rib. Blade type fuse.