JPH0317548Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a power distribution box for connecting or branching terminals such as wiring harnesses.

Prior Art In order to mutually connect or branch terminals of a wiring harness, etc., a conductor is placed inside a power distribution box case in which a plurality of connectors are arranged to connect these connectors. Use connectors that are electrically insulated between each connector, and connect the connector terminals provided at the terminals of the wiring harness and the connector terminals of various devices to these connectors, so that they can be branched or interconnected at once. The connection is being completed.

Conventional power distribution boxes include those shown in FIGS. 4 and 5, for example, in which a case 11 includes a conductor 12 having a shape corresponding to each circuit configuration.
In some cases, a plurality of insulating plates 14 are arranged in between and fixed by a back cover 13. In this example, the ends of the conductors 12 each form a connecting terminal of a connector.

In such conventional power distribution boxes, the current supplied to many devices is concentrated, so a lot of heat is generated in the conductor, and heat is generated from various devices directly connected to the connector, such as relays and fuses. The internal temperature tends to rise due to heat and heat generated by the connector terminals. Therefore, the cross-sectional area of the conductor must be large, and the power distribution box must also be large.

Problems to be solved In view of the above-mentioned circumstances, we will realize a more compact and efficient power distribution box by introducing a structure that allows the generated or conducted heat to be easily released to the outside without being trapped inside. This is the purpose of this invention.

Means for Solving the Problem The object of the present invention is to provide a power distribution box in which a conductor is disposed inside an electrically insulating case and a plurality of connectors are formed on the outer wall surface of the case, and the case is provided with a plurality of connectors arranged on the outer wall surface. A shielding plate larger than the heat dissipating port is provided inside the case, facing and parallel to the heat dissipating port, thereby forming a gap communicating with the heat dissipating port between the inner surface of the outer wall and the front surface of the shielding plate. , a heat dissipation air flow path is formed which communicates the outside world of the case with a space on the back side of the shielding plate in the case through an inward opening provided in a peripheral portion of the shielding plate, and the outer wall and the shielding plate are connected to each other. This can be achieved by connecting these with a vertical support plate.

An example of the distribution box of the present invention is shown in Fig. 1. Note that FIGS. 2 and 3 show a partial cross section of the one shown in FIG. 1.

1 is a case, 2 is a conductor, 3 is a back cover, and 4 is an intermediate insulating plate.A heat dissipation port 6 that allows ventilation is provided in the upper outer wall 5 of the case 1. A plurality of support plates 7 perpendicular to the outer wall surface are independently provided on the formed outer wall flange portion 5' toward the inside of the case 1. Further, the tip of the support plate 7 is connected to a shielding plate 8 provided inside the case in parallel with the outer wall 5, and a gap 9 is formed between the outer wall 5 and the shielding plate 8, which communicates with the heat dissipation port 6. ing.

The shielding plate 8 is wider than the heat radiation port 6, and an inner opening 10 is formed around the shielding plate 8 apart from the side wall of the case 1. Therefore, the cavity 9 also communicates with the back side of the shielding plate 8, that is, the inside of the case 1, through the inner opening 10, but the conductor 2 inside the case 1 is hidden between the flange portion 5' and the shielding plate 8. It is hidden from view from the outside.

In the power distribution box of the present invention, which is constructed by incorporating a conductor 2 into a case 1 having such a structure to form a connector, internal heat is dissipated from the inner opening 10, the cavity 9, and the heat radiation port 6. Since the heat is easily discharged to the outside through the heat dissipation air flow passage, the internal temperature can be kept lower than that of conventional power distribution boxes.

In this example, a heat dissipation structure with a heat dissipation port and a shield plate provided only on the top surface of the power distribution box is shown.
It may also be provided on the side or back cover, ie, the bottom surface. If they are provided on both the top and bottom surfaces, ventilation will be even better and the heat dissipation effect will be even better.

Furthermore, the power distribution box of the present invention is designed so that the inside cannot be seen through the heat dissipation port, so even if a conductive object collides with it from the outside, contact with the conductor inside is unlikely to occur, resulting in a safe structure. are doing.

Effects of the invention As described in detail above, the power distribution box of the invention has the following features:
It has good heat dissipation and can keep the internal temperature low.
Therefore, by making the internal conductor more compact, the power distribution box can also be made smaller.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the power distribution box according to the present invention, FIG. 2 is a sectional view taken along line B-B in FIG. 1, and FIG. - It is a sectional view along the A line. FIG. 4 is a perspective view of a power distribution box according to the prior art, and FIG. 5 is a sectional view taken along line CC in FIG. 4. DESCRIPTION OF SYMBOLS 1...Case, 2...Conductor, 3...Back cover, 4...Intermediate insulating plate, 5...Outer wall, 5'...Flange portion, 6...Radiation port, 7...Support plate, 8...
...Shielding plate, 9...Gap, 10...Inner opening.

Claims (1)

[Scope of utility model registration request] A power distribution box comprising a conductor disposed within an electrically insulating case and a plurality of connectors formed on an outer wall, the case having a heat dissipation port provided in the outer wall thereof facing and parallel to the heat dissipation port. By providing a larger shielding plate inside the case, a gap communicating with the heat dissipation port is formed between the inner surface of the outer wall and the front side of the shielding plate, and an inner space provided around the shielding plate is formed. A heat dissipating air flow path is formed through the opening to communicate the outside world of the case with the space on the back side of the shielding plate inside the case, and the outer wall and the shielding plate are connected by a support plate perpendicular to them. A power distribution box featuring: