JPH0810028Y2 - Fuse block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fuse block used for wiring in a vehicle.

[Conventional technology and its problems]

For the wiring inside a car, a fuse block was used in which a large number of fuses corresponding to various electric components are put together in one place so that inspection and attachment / detachment can be easily performed.

An example of this type of fuse block is shown in FIG. This fuse block 1 is provided with four fuse connectors 2 into which fuses are inserted and connected in the vertical direction. As shown in FIG. 4, the fuse block 1 is used by inserting a fuse (blade fuse) 3 into each fuse connector 2 and fixing it to, for example, a bracket 4 of a vehicle body. Although not shown, electric wires corresponding to the fuses 3 are connected to the fuse block 1 by connectors.

The fuse block may be used alone as described above, or may be formed as part of the electrical junction box.

By the way, recently, the number of fuses mounted on the fuse block has increased due to the increase in the number of electric components of automobiles, and the problem of temperature rise due to heat generation of the fuses cannot be ignored. That is, since the fuse generates a large amount of heat from the fusible portion when energized, the larger the number of fuses, the larger the total amount of heat generated.
As shown in FIGS. 3 and 4, in the conventional fuse block, since the fuse connectors 2 are formed vertically and horizontally at a predetermined interval, such a fuse block has a fuse connector array surface vertical (or steeply inclined). When installed in a vehicle body, etc., the upper fuse is heated by the heat generated from the lower fuses, which causes a significant temperature rise due to the synergistic effect with self-heating, resulting in poor contact between the terminals and fuse tabs and in the fuse block. Defects such as melting loss are likely to occur.

[Means for solving the problem and its action]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a fuse block in which a fuse connector into which a fuse is inserted and connected is provided in three or more stages in the vertical direction. It is characterized by a large interval.

When the fuses are arranged in multiple stages at regular intervals in the vertical direction, the second-stage fuse is heated by the heat of the first-stage (bottom-stage) fuse, and the third-stage fuse is divided into the first-stage fuse and the second-stage fuse.
The higher the level of heating is, the higher the temperature of the fuses in the upper stage, such as the heat from the fuses in the upper stage, but the higher the fuse connector in the upper stage, the larger the distance from the fuse connector in the lower stage. For example, since the heat radiation between each stage is higher in the upper part, it is possible to equalize the heated conditions of the upper fuse and the heated condition of the lower fuse, and it is possible to increase the temperature of the upper fuse significantly. It can be suppressed.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show an embodiment of the present invention. This fuse block 1 is provided with four stages of fuse connectors 2A to 2D in the vertical direction, but the interval between the first and second stage fuse connectors 2A and 2B is set to be approximately the same as the conventional one, and the second stage. And the third-stage fuse connectors 2B and 2C have a larger spacing, and the third- and fourth-stage fuse connectors 2C and 2D have a larger spacing. The method of inserting the fuse 3 and the method of attaching the fuse 3 to the bracket 4 etc. of the vehicle body are the same as the conventional ones.

The interval between the respective stages is appropriately determined depending on the heat generation amount of the fuse and the like, but in this example, the interval between the second stage and the third stage is twice that of the interval between the first stage and the second stage. The gap between the fourth and fourth steps is three times that.

In the above embodiment, the case where the fuse connector has four stages has been described, but the present invention is not limited to this, and can be similarly applied when the fuse connector has three stages or more. The present invention is also applicable to the fuse block formed as a part of the electrical junction box.

[Effect of device]

As described above, according to the present invention, the higher the fuse connector, the larger the space between the lower fuse connector and the fuse connector in the lower stage. It is possible to prevent the temperature of the upper fuse from rising significantly. Therefore, it is possible to prevent an accident such as a contact failure between the terminal and the fuse tab or a melt damage of the fuse block, and there is an advantage that reliability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a fuse block according to an embodiment of the present invention, FIG. 2 is a side view showing the usage state of the block, FIG. 3 is a perspective view showing an example of a conventional fuse block, and FIG. [Fig. 4] is a side view showing a usage state of the block. 1: Fuse block 2A to 2D: Fuse connector 3: Fuse

Claims (1)

[Scope of utility model registration request] 1. In a fuse block in which fuse connectors into which fuses are inserted and connected are provided in three or more stages in the vertical direction, the upper fuse connector has a larger interval with the fuse connector in the lower stage. Fuse block.