JP2009261119A - Electric connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connection box which can more effectively prevent the intrusion of water. <P>SOLUTION: The electric connection box comprises a relay body which accommodates a relay having a plurality of relay terminals, and a relay block having a relay terminal insertion hole into which the plurality of relay terminals are inserted. The electric connection box is also characterized by comprising such a structure that: a relay body cover extended into the relay block is formed at the relay body; a relay body engagement part engaged with the relay body cover is formed at the relay block; and the relay body cover and the relay body cover engagement part are engaged with each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrical junction box.

  Conventionally, various electronic devices are mounted on vehicles such as automobiles. In order to supply electric power to the electronic device, junction blocks configured by integrating electric circuit units such as fuses and relays are arranged at appropriate positions in the vehicle.

  Since this junction block has a fuse, a relay, a bus bar, and the like, it is called a fuse box, a relay box, or an electric connection box generically (see, for example, Patent Document 1).

  Here, an example of a conventional electrical junction box will be described with reference to FIG. FIG. 1 is a diagram illustrating an example of a conventional electrical junction box. Fig.1 (a) is an example of the perspective view of the conventional electrical junction box, FIG.1 (b) is an example of sectional drawing in the cross section B of the electrical junction box of Fig.1 (a). In FIG. 1, the relay block 100 and the relay main body (case body) 200 constituting the electrical junction box are shown in a simplified manner.

  A relay block 100 shown in FIG. 1A is a box-shaped block that is formed of synthetic resin or the like and that integrally stores a relay main body 200. On the upper surface of the relay block 100, rectangular relay terminal insertion holes 110 (four in FIG. 1A) are formed.

  A relay main body 200 shown in FIG. 1A is a box-shaped block made of synthetic resin or the like, and houses a relay 210 that is a device that opens and closes an electric circuit in accordance with an electric input signal. A plurality of relay terminals 220 project from the lower surface of the relay body 200.

  The relay block 100 and the relay main body 200 can be fitted by inserting the relay terminal 220 into the relay terminal insertion hole 110. Further, the relay terminal 220 inserted into the relay terminal insertion hole 110 is mounted with the terminal 120 in the relay block 100 as shown in FIG. The terminal 120 is one terminal of a bus bar wiring or a wiring using a wire stretched around the relay block 100. The other terminal of the wiring is connected to the battery and each electrical component by a wire harness.

  Various inventions have been made with respect to such an electrical junction box for the purpose of preventing intrusion of fluid such as rainwater into the relay body (case body).

  For example, in Patent Document 2 and Patent Document 3, when the automobile is flooded for a long time due to flooding or the like, the air inside the case body is poor because the fitting portion has poor air permeability between the inside and outside of the case body. Is difficult to escape to the outside of the case body, so that the inside of the case body is filled with air and can prevent the inflow of rainwater trying to enter the inside of the case body. A technique related to an electrical junction box that can prevent malfunction due to immersion in rainwater is disclosed.

Patent Document 4 discloses a technique related to an electrical junction box having a box body that accommodates electrical components, the box body including a bottom plate that is closed by a lid and four side walls.
JP 2004-48861 A JP 2007-336730 A JP 2007-336729 A JP 2000-125450 A

  However, when a vehicle equipped with the electrical junction box according to the above-described prior art, for example, the electrical junction box shown in FIG. Intrusion of water could not be prevented.

  When water enters the relay body 200 from the relay terminal 220, the water enters the coil-side contact of the relay 210 and leaks, so that the electrical circuit of the relay 210 is closed (that is, (ON state). Therefore, especially when the relay 210 is a starter relay related to a starter for starting the engine, the battery power is hardly consumed by the starter, and it becomes impossible to secure power for opening and closing the power window. You will not be able to escape. This is not preferable for safety.

  The present invention has been invented in order to solve this problem in view of the above points, and an object thereof is to provide an electrical junction box that can more effectively prevent water from entering.

  In order to achieve the above object, an electrical junction box according to the present invention includes a relay main body that houses a relay that includes a plurality of relay terminals, and a relay block that includes a relay terminal insertion hole into which the plurality of relay terminals are inserted. The relay main body is formed with a relay main body cover that extends to the inside of the relay block, and the relay block is for fitting with the relay main body cover. A relay main body fitting portion is formed, and the relay main body cover and the relay main body cover fitting portion can be configured to be fitted.

  In order to achieve the above object, the electrical junction box according to the present invention may be configured such that an air layer is secured inside the relay body cover even when the electrical junction box is submerged. it can.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical junction box which can prevent invasion of water more effectively can be provided.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the embodiment described below, the present invention is described by taking an example in which the present invention is applied to a relay box mounted in an engine room of a vehicle such as an automobile. However, the present invention is not limited to this case. . It can also be applied to other electrical junction boxes that should be prevented from malfunctioning due to water intrusion.

[Embodiment]
(An example of a vehicle equipped with a relay box)
FIG. 2 is a diagram illustrating an example of a vehicle equipped with a relay box according to the present embodiment. In FIG. 2, the relay box 1 in this embodiment is attached using a bolt etc. in the engine room 2 of vehicles, such as a motor vehicle. Since the method for attaching the relay box 1 to the vehicle is a known technique, a detailed description thereof is omitted here.

  In addition, according to the relay box 1 in this embodiment, it can also be comprised so that it may be attached to predetermined positions, such as the lower part of the headlamp 3, or the position below a suspension axis | shaft, for example. This is because the relay box 1 in the present embodiment can effectively prevent water from entering due to the structure (FIGS. 3 and 4) described later.

  That is, the conventional relay box is restricted to be installed at a certain height for reasons such as preventing water from entering. On the other hand, since the relay box 1 in the present embodiment can more effectively prevent the ingress of water, such a restriction can be reduced. In the conventional case, the relay box 1 is at the predetermined position where the ingress of water is a concern. Can be attached. In this case, the method for attaching the vehicle to the vehicle is also a known technique, and detailed description thereof is omitted here. By using the relay box 1 that is not easily restricted by such an installation position, the space in the engine room 2 can be effectively used.

(Relay box structure)
FIG. 3 is a diagram illustrating an example of the structure of the relay box in the present embodiment. FIG. 3A is an example of a perspective view of the relay box in the present embodiment, and FIG. 3B is an example of a cross-sectional view taken along a cross-section A in FIG. In addition, in FIG. 3, the relay block 10 and the relay main body (case body) 20 which comprise the relay box (electrical connection box) 1 are simplified and shown like FIG.

  The relay block 10 shown in FIG. 3A is a box-shaped block that is formed of synthetic resin or the like and that integrally stores the relay main body 20, similarly to the relay block 100 of FIG. 1. A plurality of rectangular relay terminal insertion holes 11 (four in FIG. 3A) are formed on the upper surface of the relay block 10.

  In the relay block 10 in the present embodiment, a rectangular relay body cover fitting portion 13 having a predetermined width is formed outside the relay terminal insertion hole 11. This relay main body cover fitting part 13 is a recessed part formed in order to fit with the relay main body cover 23 (refer FIG.3 (b)).

  The relay body 20 shown in FIG. 3A is a box-shaped block formed of synthetic resin or the like, similar to the relay body 200 of FIG. This relay 21 is accommodated. A plurality of relay terminals 22 (not shown in FIG. 3A) project from the lower surface of the relay body 200.

  In the relay main body 20 according to the present embodiment, a rectangular relay main body cover 23 having a predetermined width extending from the outer periphery of the lower surface of the relay main body 20 substantially vertically downward is formed. That is, the relay body cover 23 which is a cover of the relay body 20 is configured to extend to the relay body cover fitting portion 13 (inside the relay block 10). The relay main body cover 23 is a convex portion formed for fitting with the relay main body cover fitting portion 23 of the relay block 10.

  Such a relay block 100 and the relay main body 200 can be fitted together by inserting the relay terminal 22 into the relay terminal insertion hole 11. In addition, the relay body cover 23 and the relay body cover fitting portion 13 are fitted. The relay terminal 22 inserted into the relay terminal insertion hole 11 is mounted with the terminal 12 in the relay block 10 as shown in FIG. This terminal 12 is one terminal of a bus bar wiring or a wiring using a wire stretched around the relay block 10. The other terminal of the wiring is connected to the battery and each electrical component by a wire harness.

  As a result, even when a vehicle equipped with the relay box (electrical connection box) 1 in this embodiment is submerged due to an accident such as falling into a river or the sea, the relay block 10 and Since an air layer is secured inside the relay body 20 (in particular, inside the relay body cover 23), water can be prevented from entering the relay body 20 from the relay terminal 22. FIG. 4 is a diagram for explaining the state of the relay box when submerged. In particular, when the relay 21 is a starter relay related to a starter for starting the engine, it is possible to prevent the battery electricity from being consumed by the starter.

  As described above, by using the relay box structure described in the present embodiment, it is possible to prevent the starter from malfunctioning due to a leak in the case of a fall accident to the river or the sea without special waterproof treatment. Can do.

  The shapes of the relay main body cover fitting portion 13 and the relay main body cover 23 are not limited to those shown in FIG. 3, and can be appropriately changed as long as an air layer can be secured inside the relay main body cover 23. To do.

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the requirements shown here, such as combinations with other elements described in the above embodiments. With respect to these points, the present invention can be changed within a range that does not detract from the gist of the present invention, and can be appropriately determined according to the application form.

It is a figure which shows an example of the conventional electrical junction box. It is a figure which shows an example of the vehicle carrying the relay box in this embodiment. It is a figure which shows an example of the structure of the relay box in this embodiment. It is a figure for demonstrating the condition of the relay box at the time of submergence.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical junction box 10 Relay block 11 Relay terminal insertion hole 12 Terminal 13 Relay main body cover fitting part 20 Relay main body 21 Relay 22 Relay terminal 23 Relay main body cover

Claims (2)

An electrical junction box having a relay body that houses a relay having a plurality of relay terminals, and a relay block having a relay terminal insertion hole into which the plurality of relay terminals are inserted,
The relay body is formed with a relay body cover extending to the inside of the relay block, and the relay block is formed with a relay body fitting portion for fitting with the relay body cover. An electric junction box having a structure in which a main body cover and the relay main body cover fitting portion are fitted.   The electrical junction box according to claim 1, wherein an air layer is secured inside the relay main body cover even when the electrical junction box is submerged.

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