JP3367419B2 - Electrical junction box - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box installed in, for example, an engine room of an automobile. 2. Description of the Related Art Conventionally, this type of electric junction box (junction box (J / B)) accommodates various electric components for automobiles and connects wirings such as wire harnesses and connection cables. It serves as a branch point and has various types depending on the vehicle type and application. For example, as shown in FIGS. 4 and 5 , an electric connection box 101 includes a case body 102 and a case body 1.
02 and the like. A housing recess 105 for housing the connection cable 104 is formed on the side of the case body 102. Further, a skirt portion 106 is provided on a side portion of the upper cover 103 so as to cover the accommodation recess 105.
Are formed to protrude. By fitting the upper cover 103 having the skirt portion 106 to the case body 102, the electrical junction box 101 is waterproofed. [0004] By the way, in the conventional electric junction box 101, the case main body 102 and the upper cover 103 are connected so that the upper cover 103 (skirt portion 106) can be smoothly fitted to the case main body 102. It is set so that a slight gap (for example, 0.2 mm) is generated between itself and the base 103. For this reason, there is a possibility that water may enter the electrical connection box 101 from the side of the skirt portion 106 through the gap. Therefore, by securing the wrapped portion of the skirt portion 106 shown in FIG. 7 shaded, that is, the portion where the case body 102 and the skirt portion 106 of the upper cover 103 overlap, a large amount of electrical connection is made from the lateral gap of the skirt portion 106. Water was prevented from entering the inside of the box 101. However, the waterproof performance of the wrap portion is insufficient, and the size (width) of the wrap portion needs to be secured, so that the size of the upper cover 103 (particularly, the skirt portion 106) and the entire electric connection box 101 are increased. The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to smoothly perform an operation of fitting an upper cover to a case main body, and to perform an internal operation from a lateral gap of a skirt portion. It is an object of the present invention to provide an electric junction box which can prevent water from entering the water and can be reduced in size as a whole. In order to achieve the above object, according to the first aspect of the present invention, a case body having an open upper surface, a case body fitted to the case body and an open lower surface are provided. An upper cover, wherein a housing recess for housing a connection cable is formed on a side of the case body, and a skirt is formed on the side of the upper cover so as to cover the housing recess. In the junction box,
Hang the skirt from the side of the upper cover
And sea urchin formed, between the case body and the skirt portion
Securing a slight gap, the closure means for closing the gap provided, the closure means, definitive on the side of the case body
Projections formed on the outer peripheral surface of the case body on both sides of the housing recess and extending in the vertical direction, and correspond to the respective projections.
And is formed on the inner surface of the skirt portion and extends vertically.
And a concave groove with an open lower end.
The ridge and the groove are fitted in an uneven relationship,
The feature is that there is no gap between them
I have. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the electric connection box 11 is made of, for example, a synthetic resin material, and has a case main body 12, an upper cover 13 fitted on the upper part of the case main body 12, and the like. It is configured. Note that a configuration in which a lower cover (not shown) is fitted to the lower portion of the case body 12 may be employed. As shown in FIG. 1, the case main body 12 is formed in a box shape having an open upper surface, and a locking portion 14 for locking the upper cover 13 protrudes from a side portion thereof. The connection cable 1 is provided on the side of the case body 12.
A pair of accommodation recesses 16 for accommodating 5 are formed. On the upper surface of the case body 12, electric components such as nuts (not shown), bus bars 17, terminals 18 of connection cables 15, and fuses 19 are fixed by bolts 20.
These are in an electrically connected relationship. One of the connection cables 15 is connected to a battery (not shown), and the other of the connection cables 15 is connected to an alternator (not shown). As shown in FIGS. 1 and 2, the upper cover 13 has a shape in which the lower surface is opened, and a locking claw 21 is formed on a side portion thereof so as to correspond to the locking portion 14.
Is protruding. The upper cover 13 is detachably fitted to the case main body 12 by locking the locking claws 21 to the locking portions 14. A skirt portion 22 is formed on the side of the upper cover 13 so as to cover the housing recess 16. More specifically, the pair of skirt portions 22 are provided with the locking claws 2.
1 is formed so as to hang from the side of the upper cover 13 so as to sandwich it. Further, in the present embodiment, the following structure is employed in order to enhance the waterproof performance between the case body 12 and the skirt portion 22 in the electric connection box 11. That is, as shown in FIGS. 1 to 3, in the electric connection box 11 according to the present embodiment, the ridges 23 as closing means are provided on both sides of the housing recess 16 on the side of the case body 12.
Rolled while being protruded on the outer peripheral surface of the case body 12 so as to extend in the vertical direction, as the inner surface of the skirt portion 22 corresponding to the respective protrusion 23, and the vertical direction in
Make a concave shape as a closing means , open the lower end
Groove portion 24 is formed. As shown in FIG. 3, the ridge 23 and the groove 24 are fitted in an uneven relationship so that no gap is formed between them. Now, in the electric connection box 11 of the present embodiment shown in FIGS. 2 and 3, even if water tries to intrude from the lateral gap between the case body 12 and the skirt portion 22 of the upper cover 13, the relationship between the irregularities The protrusions 23 of the case body 12 and the grooves 24 of the upper cover 13 that are fitted together prevent water from entering the electric connection box 11. As described in detail above, according to the present embodiment, the following effects can be obtained. (1) Since a small gap (for example, 0.2 mm) is secured between the case body 12 and the upper cover 13 (skirt portion 22) in a portion other than the fitting portion of the ridge 23 and the groove portion 24, Even when the groove 24 of the upper cover 13 is fitted to the ridge 23 of the case body 12,
2 can be smoothly fitted. (2) In the electrical junction box 11 of the present embodiment, the electrical connection is made from the lateral gap between the case body 12 and the skirt portion 22 of the upper cover 13 due to the close fitting of the ridges 23 and the grooves 24. Since it is possible to reliably prevent water from entering the inside of the box 11, it is possible to improve the waterproofness between the case body 12 and the skirt portion 22. (3) Case body 12 and skirt portion 22
Since the waterproof performance between the two is enhanced by the ridges 23 and the grooves 24, it is not necessary to secure a large number of wraps as in the related art. As a result, the size of the electric connection box 11 as a whole can be reduced. Thereby, the manufacturing cost of the electric connection box 11 can be reduced . Further, the “electric junction box” referred to in this specification stores various electric components and the like, and uses them for wiring such as a wire harness and a connection cable. It means any aspect of an intervening entity provided for connection, and is not limited to a so-called junction box (J / B). The present invention is configured as described above, and has the following effects. According to the first aspect of the present invention, the work of fitting the upper cover to the case main body can be performed smoothly, and water can be prevented from entering the inside of the electric connection box from the gap beside the skirt portion. In addition, the size of the entire electric connection box can be reduced. [0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a plan view of a case body according to the first embodiment, and FIG. 1B is a bottom view of an upper cover according to the first embodiment. FIG. 2 is a front view showing the electric junction box according to the first embodiment of the present invention. FIG. 3 is a plan sectional view showing a fitted state of a case main body and a skirt portion in the first embodiment. FIG. 4 is a front view showing a conventional electric junction box. FIG. 5 is a view showing a conventional electric junction box and a case
FIG. 4 is a plan cross-sectional view showing a fitted state with a seat portion. [Description of Signs] 11 ... electric junction box, 12 ... case body, 13 ... upper cover, 15 ... connection cable, 16 ... accommodation recess, 22 ...
Skirt part, 23 ... Protrusion as closing means, 24 ... Groove part as closing means, 41 ... Electric connection box, 42 ... Upper cover, 43 ... Skirt part, 44 ... Protrusion as closing means.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 3/14

Claims (1)

(57) [Claims] A case body having an open upper surface; An upper cover which is fitted to the case body and has an open lower surface.
And To accommodate the connection cable on the side of the case body
And a recess for the upper cover.
A skirt part protrudes from the side to cover the accommodation recess
In the completed electrical junction box,Hang the skirt from the side of the upper cover
Forming Between the case body and the skirt portionA small gap
Secure thatProviding closing means to close the gap, The closing means is provided on the side of the case body.Said income
On both sides of the recessProjection formed on outer surface of case bodySa
And extend verticallyRidgeAnd corresponding to each ridge
It is formed on the inner surface of the skirt and extends vertically
It is composed of a concave groove with an open lower end, The ridge and the groove are fitted in an uneven relationship, and between the two.
Characterized by no gaps Electrical
Connection box.