JP3330864B2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box in which an electric device such as a fuse, a relay, or a connector can be connected to a housed wiring board. It is about a box.

[0002]

2. Description of the Related Art In electric wiring of automobiles, connection parts of electric devices such as fuses, relays, and connectors for branch wiring are provided so that maintenance and inspection of fuses and relays, and inspection and expansion of branch wiring are easy. Are collected in an electrical junction box provided at an appropriate place in the vehicle compartment or the engine room.

Heretofore, as such an electric connection box for a vehicle, a space for accommodating a wiring board provided with connection terminals includes, for example, an undercover with an open top, and a main cover for covering an open portion of the undercover. As shown in FIG. 8, device mounting cavities 2, 3, and 4 for fitting and holding an electric device (not shown) are integrally formed on the main cover 1 with an insulating resin on the main cover 1. There is.

As shown in FIG. 9, the equipment mounting cavity 2 is for fitting and holding the relay 6 at a predetermined position on the wiring board 8, and the relay 6 is provided with a connection provided on the wiring board 8. The terminal 9 is electrically connected. Further, as shown in FIG. 10, the device mounting cavity 3 is for fitting and holding the fuse 10 at a predetermined position of the wiring board 8, and the fuse 10 is connected to the connection terminal 9 mounted on the wiring board 8. And make an electrical connection. Also, the equipment mounting cavity 4 is not shown,
A connector for branch connection or the like is fitted and held in accordance with the arrangement of the bus bar terminals erected on the wiring board 8.

[0005]

By the way, in the case of an electric junction box for a vehicle, the number of cavities 2, 3, and 4 for mounting each device may be various depending on the type of the vehicle to be mounted and the grade of the vehicle. Required. Therefore, as described above, in the configuration in which the device mounting cavities 2, 3, and 4 are integrally formed with the main cover 1, a large number of main covers 1 must be prepared in accordance with the difference of the vehicle type specifications. There is a problem that preparing a large number of molds for molding 1 increases the manufacturing cost for the mold. Also, when the design of the number of equipment cavities 2, 3, and 4 is changed, a lot of time is required for designing the mold.
There was also a problem that it was difficult to respond in a short time.

The present invention has been made in view of the above circumstances, and provides an electric connection box which can simplify the mold structure of the main cover even when preparing a main cover having a different number of equipment mounting cavities, Accordingly, it is an object of the present invention to reduce the manufacturing cost of the mold and to shorten the time required for designing the mold in response to a change in the number of equipment mounting cavities.

[0007]

An electric connection box according to the present invention for achieving the above object accommodates a wiring board provided with connection terminals and fits and holds an electric device electrically connected to the connection terminals. In an electrical junction box provided with a device mounting cavity for exposing on a main cover covering the wiring board, the device mounting cavity is provided with the wiring
A plate is provided so as to be fixable to the plate, and the
Cavity exposure to allow mounting in mounting cavity
And provided separately from the main cover having the opening for use .

According to the above construction, the main cover has a cavity exposing opening for exposing the device mounting cavity in a wall member which covers the housed wiring board separately from the device mounting cavity. Since the structure is simply provided, the structure of the mold for molding the main cover can be simplified. In addition, in response to a change in the number of equipment mounting cavities, a simple design change on a substantially flat surface, in which the number of equipments for the cavity exposure opening is changed, is sufficient. , Can be shared. Therefore, even when preparing a main cover having a different number of equipment mounting cavities, it is not necessary to prepare another type of mold having a complicated structure, and the manufacturing cost of the mold can be reduced. In addition, since a part of the mold of the main cover can be changed even when the number of the equipment mounting cavities is changed, the time required for the mold design can be reduced.

[0009] The main cover can be easily cut off, and a suitable number of window plates, which are to be cut out and serve as openings for exposing the cavities, are provided on the wiring board in accordance with the planned positions of electric devices to be added. The structure should be good.

[0010] In this case, even if only one kind of main cover is used, various kinds of main covers having different numbers of equipment mounting cavities can be easily obtained depending on whether or not the window plate mounted thereon is cut off. In addition, the manufacturing cost can be reduced, and the design time for the change in the number of equipment mounting cavities can be shortened.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an electric junction box according to the present invention will be described below in detail with reference to the drawings. FIG.
FIG. 7 to FIG. 7 show an embodiment of the electric junction box according to the present invention. The electrical connection box 12 is configured such that a space for accommodating the wiring board 20 provided with the connection terminals 17 is defined by an undercover (not shown) having an open top and a main cover 13 covering an open portion of the undercover. Consists of
The connection terminals 17 are used for electrical connection with various electric devices such as the relay 6 (see FIG. 5) and the fuse 10 (see FIG. 2) provided on the electric connection box 12. Each of the under cover and the main cover 13 is injection-molded with an insulating resin material.

On the main cover 13 which covers the wiring board 20, the device mounting cavities 15 and 16 for fitting and holding various electric devices (such as the relay 6 and the fuse 10) are exposed, as shown in FIG. Cavity 15 for mounting each device,
Reference numeral 16 is formed separately from the main cover 13.

The device mounting cavity 15 is for fitting and holding the fuse 10 as shown in FIG.
As shown in FIGS. 3 and 4, the device mounting cavity 15 has a mounting hole 18 for screwing at the center of the bottom wall, and as shown in FIG. It is fixed to the wiring board 20 by the mating screw 19.

Further, the equipment mounting cavity 16 is
As shown in FIG. 5, this is for fitting and holding the relay 6. The device mounting cavity 16 is shown in FIGS.
As shown in FIG. 5, a lug 21 protruding from both sides of the bottom wall has a mounting hole 22 for screwing, and as shown in FIG. Fixed to

On the other hand, as shown in FIG. 1, the main cover 13 is used for exposing various electric devices (relays 6 and fuses 10) to the device mounting cavities 15 and 16 so as to expose the cavities. Openings 26, 27, 28
Is provided. Here, the cavity exposing opening 26 corresponds to the device mounting cavity 15, and is set to have a size that exposes a tip end of the device mounting cavity 15. The cavity-exposing opening 27 corresponds to the device mounting cavity 16 and is set to have a size that exposes the tip of the device mounting cavity 16. Further, the cavity exposing opening 28 is for a connector (not shown) for branch connection, and is set to a size that allows the connector to be inserted.

In the case of the present embodiment, a spacer for preventing the main cover 13 from bending or an inner wall member 30 functioning as a reinforcing plate is provided between the main cover 13 and the wiring board 20. Although not shown, the inner wall material 30 is screwed onto the wiring board 20, and when the main cover 13 and the wiring board 20 are screwed, the respective cavity exposing openings are positioned at predetermined positions. It also plays the role of positioning.

In the electric junction box 12 described above, the main cover 13 is separate from the equipment mounting cavities 15 and 16, and the device mounting cavities 15 and 16 are attached to a wall member that covers the housed wiring board 20. Since it has a simple structure in which only the cavity exposing openings 26 and 27 to be exposed are provided, the structure of a mold for molding the main cover 13 can be simplified. In addition, even if the number of equipments in the device mounting cavities 15 and 16 is changed, the cavity exposing openings 26 and 27
In this case, the design change on a substantially flat surface is required by changing the number of equipments, and the main part of the mold for the main cover 13 can be shared. Also, the cavity 15 for mounting the device,
A change in the number of equipments of 16 can be dealt with by a simple design in which a part of the mold of the main cover 13 is changed in design.

The main cover in the electric connection box of the present invention is preferably easily cut off, and the cutout forms a window plate which becomes the cavity exposing openings 26 and 27 on the wiring board 20. It is also possible to adopt a structure in which a suitable number of devices are provided in advance in correspondence with the planned locations for adding electric devices. In this way, even if the main cover 13 is of one type, various types of main covers having different numbers of equipment mounting cavities 15 and 16 can be easily obtained depending on whether or not the window plate mounted thereon is cut off. The manufacturing cost can be reduced, and the design time for changing the number of equipment mounting cavities can be shortened. Furthermore, in the electric connection box of the present invention, the structure of the wiring board 20, the type of electric equipment electrically connected to the wiring board 20, the specific structure of the equipment mounting cavities 15, 16 and the like are limited to the above embodiment. The design can be changed as appropriate without departing from the spirit of the present invention.

[0019]

According to the electrical junction box of the present invention, the main cover is separate from the equipment mounting cavity, and the cavity exposing the equipment mounting cavity to a wall member that covers the housed wiring board. Since the structure is simple enough to provide the opening for the cavity, the mold structure for molding the main cover can be simplified, and even if the number of the equipment mounting cavities is changed, the equipment for the cavity exposing opening is provided. A simple design change on a substantially flat surface by changing the number is sufficient, and the main part of the mold for the main cover can be shared. Therefore, even when preparing various main covers having different numbers of equipment mounting cavities, it is not necessary to prepare other types of molds having a complicated structure, and the manufacturing cost can be reduced. In addition, a change in the number of equipment mounting cavities can be dealt with only by changing a part of the mold of the main cover, so that the time required for mold design can be reduced. Then, the main cover can be easily cut off, and a window plate that becomes the opening for exposing the cavity by cutting off is provided with a suitable number of window plates corresponding to the planned positions of electric devices on the wiring board. In this case, even if only one type of main cover is manufactured, various types of main covers with different numbers of equipment mounting cavities can be easily obtained depending on whether or not the window plate mounted on it is cut off. In addition, it is possible to reduce the manufacturing cost and to shorten the design time for changing the number of equipment mounting cavities.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of an electric junction box according to the present invention.

FIG. 2 is a sectional view showing an assembled state of the main cover shown in FIG. 1 and a device mounting cavity of a fuse.

FIG. 3 is a plan view of a device mounting cavity of the fuse shown in FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a cross-sectional view of the main cover shown in FIG. 1 and a relay mounting cavity of the relay in an assembled state.

6 is a plan view of a device mounting cavity of the relay shown in FIG. 5;

FIG. 7 is a sectional view taken along line BB of FIG. 6;

FIG. 8 is a perspective view showing a structure of a main cover of a conventional electric junction box.

9 is a sectional view of a relay mounting cavity in the main cover shown in FIG. 8;

10 is a sectional view of a fuse mounting cavity in the main cover shown in FIG. 8;

[Explanation of symbols]

 Reference Signs List 6 relay 10 fuse 12 electric connection box 13 main cover 15, 16 cavity for mounting equipment 20 wiring board 26, 27, 28 opening for exposing cavity 30 inner wall material

Claims (2)

(57) [Claims] An apparatus mounting cavity for accommodating a wiring board provided with connection terminals and for fitting and holding an electric equipment electrically connected to the connection terminals is exposed on a main cover covering the wiring board. In the electrical junction box provided, the device mounting cavity is provided so as to be fixable to the wiring board.
And the mounting cavity of the electrical device
With an opening for exposing the cavity to allow mounting on
An electric junction box provided separately from the main cover . 2. The method according to claim 1, wherein the main cover is easily cut off, and a number of window plates, which become the openings for exposing the cavities when cut off, are provided in an appropriate number in accordance with the planned number of electric devices to be added on the wiring board. The electrical junction box according to claim 1, wherein: