JP2007181339A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability in the insertion work of electric wires and the connection work of connectors and to prevent electric wire catch, in an electric connection box used for vehicles. <P>SOLUTION: A work recessed portion 24, which is recessed to the side, is provided on the sidewall 23 of a connection box body 2. A fitting projection 34, which is fitted to the work recessed portion 24, is provided on a waterproof cover 3. This structure improves the workability in the insertion work of the electric wires and the connection work of the connectors and prevents the electric wire catch. The waterproof cover 3 shows high strength because the fitting portion 34 functions as a reinforcing rib. When the connection box 1 is assembled by fitting the waterproof cover 3 to the connection box body 2, the fitting surface P1 of the connection box body 2 and that P2 of the waterproof box 3 are stacked to be formed on the same plane. Thus, the connection box 1 can secure its waterproof capability without forming a particular structure more than necessary. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electrical connection box such as a relay block, a junction block, a connector block, a fuse box, and an ECU (Electronic Control Unit) box used in an automobile.

Conventionally, as this type of electrical junction box, in consideration of use in a flooded environment, one having a structure in which a waterproof cover is fitted to the junction box body has been widely used (see, for example, Patent Document 1). .
JP 2002-95133 A

  However, in this case, since the side wall is erected in the vicinity of the electric wire connection portion, there is a problem that workability in the electric wire insertion work and the connector connection work is poor.

  An object of this invention is to provide the electrical junction box which can solve such a subject.

First, the invention of the electrical junction box according to claim 1 is an electrical junction box in which a waterproof cover is fitted to the junction box body, wherein the junction box body is provided with a working recess that is recessed laterally, The waterproof cover is provided with an engaging convex portion that engages with the working concave portion.
In the invention of the electrical junction box according to claim 2, the fitting surface between the junction box body and the waterproof cover is on the same plane.
Moreover, in the invention of the electrical junction box according to claim 3, the engaging convex portion includes a flat portion, curved portions that are respectively continuous on the left and right sides of the flat portion, and linear portions that are respectively continuous with these curved portions. And a rising portion that is continuous with each of the straight portions and that is continuous with the side wall of the waterproof cover.
Moreover, in the invention of the electrical junction box according to claim 4, the engaging convex portion includes a flat portion, a curved portion continuous below the flat portion, a straight portion continuous to the curved portion, and the straight line. And a rising portion that is continuous with the side wall of the waterproof cover.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the workability | operativity in the insertion operation | work of an electric wire or the connection operation | work of a connector, the biting of an electric wire can be prevented.

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

  1 is an assembled perspective view showing an embodiment of an electrical junction box according to the present invention, FIG. 2 is an exploded perspective view of the electrical junction box shown in FIG. 1, and FIG. 3 is a junction box body of the electrical junction box shown in FIG. FIG. 4 is a front view of the engaging convex portion of the waterproof cover, FIG. 5 is a right side view of the engaging convex portion of the waterproof cover, and FIG. 6 is an engaging convex portion of the waterproof cover. It is a top view of a part.

  As shown in FIG. 1, the electrical junction box 1 includes a junction box body 2 and a waterproof cover 3 that is fitted to the lower side of the junction box body 2.

  First, as shown in FIG. 2, the connection box main body 2 is provided with a component mounting portion 21 on which a circuit component (not shown) such as a relay or a fuse is mounted, as shown in FIG. As shown in FIG. 3, the electric wire connection part 22 to which the connector (not shown) of a wire harness is connected is arrange | positioned. A side wall 23 is provided around the electric wire connection portion 22, and a plurality of (for example, four) engagement pieces 26 are formed on the side wall 23 as shown in FIG. 2. A bracket 25 for attaching the junction box body 2 to the vehicle body (not shown) is formed. Moreover, the fitting surface P1 with the waterproof cover 3 is formed on the lower end of the side wall 23 on one plane. Furthermore, the side wall 23 is formed with a working recess 24 that is recessed laterally (a direction perpendicular to the fitting direction of the waterproof cover 3).

  On the other hand, as shown in FIG. 2, the waterproof cover 3 has a rectangular plate-like bottom plate 31, and a side wall 33 is erected on the bottom plate 31. And the fitting surface P2 with the junction box main body 2 is formed in the upper end of the side wall 33 on one plane. The side wall 33 is provided with a locking protrusion 32 slightly below the upper end thereof, and a U-shaped wire harness insertion groove 35 for pulling out an electric wire (not shown) of the wire harness. It is formed in a shape that opens. The side wall 33 is formed with a plurality of (for example, four) engagement claws 36 that engage with the engagement pieces 26 of the connection box body 2 when the waterproof cover 3 is fixed to the connection box body 2. Yes. Further, the side wall 33 is formed with an engaging convex portion 34 that engages with the working concave portion 24 of the junction box body 2 so as to bulge laterally (a direction perpendicular to the fitting direction of the waterproof cover 3). .

  As shown in FIGS. 4 and 5, the engaging convex part 34 has a rectangular plate-like flat part 34 a, and the upper end of the flat part 34 a is flush with the side wall 33. Moreover, the lower end of the engaging convex part 34 is formed in the S-shaped cross section. That is, a curved portion 34b is continuously provided at the lower end of the flat portion 34a, a straight portion 34c is continuously provided below the curved portion 34b, and a rising portion 34d is provided below the straight portion 34c. Are connected to the side wall 33. Moreover, the right end of the engaging convex part 34 is formed in the S-shaped cross section. That is, as shown in FIGS. 4 and 6, a curved portion 34e is connected to the right end of the flat portion 34a, a straight portion 34f is connected to the right side of the curved portion 34e, and a straight line is further provided. On the right side of the portion 34 f, a rising portion 34 g is provided continuously to the side wall 33. In addition, the left end of the engaging convex portion 34 is formed in an S-shaped cross section so as to be line symmetric with the right end of the engaging convex portion 34.

  As described above, in the electrical junction box 1, since the working recess 24 is provided around the side wall 23 of the junction box body 2, the workability in the wire insertion work and the connector connection work is improved, and the wire bite is improved. Can be prevented.

  Further, the waterproof cover 3 exhibits high strength because the engaging convex portion 34 functions as a reinforcing rib.

  Further, when the waterproof cover 3 is fitted to the junction box body 2 to assemble the electrical junction box 1, the fitting surface P1 of the junction box body 2 and the fitting surface P2 of the waterproof cover 3 are formed as shown in FIG. They overlap and exist on the same plane. Therefore, the electrical junction box 1 can ensure waterproof performance without making the structure more than necessary.

  Further, without providing a special guide shape to the bus bar (not shown), the arrangement of the male tab terminal can also serve as protection of the tuning fork terminal and guidance when the bus bar is inserted. As a result, an increase in the material cost of the bus bar can be suppressed.

  Moreover, since the lower end and right and left both ends of the engaging convex part 34 are formed in the S-shaped cross section, the fitting state of the junction box main body 2 and the waterproof cover 3 is stabilized.

  In addition, various waterproof structures can be given to the fitting portion between the junction box body 2 and the waterproof cover 3. For example, as shown in FIG. 7, a stepped portion 27 with the inner surface side cut out is formed at the lower end portion of the side wall 23 of the junction box body 2, and the outer surface side is cut off at the upper end of the side wall 33 of the waterproof cover 3. By forming the stepped portion 37 lacking and fitting these stepped portions 27 and 37 to each other, it is possible to prevent water from entering the inside from the fitting portion between the junction box body 2 and the waterproof cover 3. Can do. Alternatively, as shown in FIG. 8, a stepped portion 27 with the inner surface side cut out is formed at the lower end portion of the side wall 23 of the junction box body 2, and the outer surface side is connected to the upper end of the side wall 33 of the waterproof cover 3. A notched stepped portion 37 is formed, a waterproof wall 38 is erected on the inner surface side of the stepped portion 37, and the stepped portions 27 and 37 are fitted to each other, whereby the junction box body 2 It is possible to prevent moisture from entering through the fitting portion between the waterproof cover 3 and the waterproof cover 3. In this case, if a gap is provided between the inner surface of the side wall 23 of the junction box main body 2 and the waterproof wall 38 of the waterproof cover 3, it becomes possible to prevent a situation where water crawls between the two due to capillary action. The property is further improved.

  The present invention can be widely applied to various industrial fields such as automobiles, airplanes, trains, manufacturing plants, electrical appliances, and OA equipment.

It is an assembly perspective view showing one embodiment of an electric junction box concerning the present invention. It is a disassembled perspective view of the electrical junction box shown in FIG. It is the perspective view which looked at the junction box main body of the electrical junction box shown in FIG. 1 from the back side (waterproof cover side). It is a front view of the engagement convex part of a waterproof cover. It is a right view of the engagement convex part of a waterproof cover. It is a top view of the engagement convex part of a waterproof cover. It is sectional drawing which shows an example of the waterproof structure of the fitting part of a connection box main body and a waterproof cover. It is sectional drawing which shows the other example of the waterproof structure of the fitting part of a connection box main body and a waterproof cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electrical junction box 2 ... Junction box main body 23 ... Side wall 24 ... Working recessed part 3 ... Waterproof cover 33 ... Side wall 34 ... Engaging convex part 34a ... Flat part 34b, 34e ... Curved part 34c , 34f …… Linear part 34d, 34g …… Rising part P1, P2 …… Fitting surface

Claims (4)

An electrical junction box with a waterproof cover fitted to the junction box body,
The connection box body is provided with a working recess that is recessed to the side,
The electrical connection box, wherein the waterproof cover is provided with an engaging convex portion that engages with the working concave portion.   The electrical connection box according to claim 1, wherein a fitting surface between the junction box body and the waterproof cover is on the same plane. The engaging projection is
A flat part,
Curve portions that are continuous on the left and right sides of the flat portion,
A straight line portion that continues to each of these curve portions;
The electrical junction box according to claim 1, further comprising rising portions that are respectively continuous with the linear portions and that are respectively continuous with the side walls of the waterproof cover. The engaging projection is
A flat part,
A curved portion continuous below the flat portion, and
A straight line portion continuous to the curved portion, and
The electrical junction box according to any one of claims 1 to 3, further comprising: a rising portion that is continuous with the linear portion and that is continuous with a side wall of the waterproof cover.

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