JP2016025739A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box without the need to use a metal mold of complicated shape that can be inexpensively produced and is able to enhance waterproofness.SOLUTION: An electric connection box 10 comprises: a box body 1 to which a relay is attached; a side cover 2 covering an opening 14 in the box body 1; and a band 4 for fixing the box body 1 and side cover 2. The box body 1 has, on a face joined to the side cover 2, a rib 151 projecting toward the side cover 2 and extending near and along the opening 14. Additionally, when the box body 1 and the side cover 2 are fixed by the band 4, the rib 151 is deformed and the box body 1 and side cover 2 are fixed by the band 4 in close contact with each other.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an electrical junction box including a box body to which components are attached, and a cover body that covers an opening of the box body.

  Conventionally, various types of electrical connection boxes installed in automobiles and the like include a box body on which electronic parts such as a fuse and a relay are mounted, and a side cover attached to an opening provided on a side surface of the box body. It has been proposed (see, for example, Patent Document 1).

  Some of such electrical junction boxes are provided with a so-called maze structure for preventing water from entering from the outside as shown in FIG. 7, for example.

  An electrical junction box 800 shown in FIG. 7 includes a box body 801 and a side cover 802 that covers an opening 811 provided on the peripheral wall of the box body 801. The peripheral wall of the box main body is constituted by a double wall including a main body side inner wall portion 812 and a main body side outer wall portion 813. The opening 811 is provided so as to cut out the peripheral wall in order to attach a component or the like (not shown) to which an electric wire is connected. A lock arm 814 that is fitted to the fitting portion 823 of the side cover 802 is provided on the outer surface of the main body side outer wall portion 813. The side cover 802 is fitted to the cover side inner wall 821 that contacts the inner surface of the main body side inner wall portion 812, the cover side outer wall 822 that contacts the outer surface of the main body side outer wall portion 813 and covers the opening 811, and the lock arm 814. And a fitting portion 823. The side cover 802 is attached by fitting a fitting portion 823 and a lock arm 814 provided on the box body 801. Further, in the state where the side cover 802 is attached to the box body 801, the water intrusion path from the outside in the electrical connection box 800 is not a straight line but a so-called maze that is bent in a complicated manner as shown by an arrow A in FIG. Since it has a structure, entry of water from the outside can be prevented.

JP 2014-108040 A

  However, in order to manufacture an electrical junction box 800 having a so-called maze structure in order to prevent water from entering from the outside, a complicatedly shaped mold is required, which increases the manufacturing cost. was there. The side cover 802 has a structure in which the fitting portion 823 and the lock arm 814 are fitted and attached to the box body 801. In this structure, the side cover 802 has a backlash due to the fitting tolerance of the fitting portion 823 and the lock arm 814. Since it is unavoidable to occur, there is a problem that the gap between the box body 801 and the side cover 802 cannot be completely closed, and the waterproofness is not sufficient.

  Accordingly, the present invention focuses on the above problems and provides an electrical junction box that does not require the use of a mold having a complicated shape, can be manufactured at low cost, and can be waterproof. With the goal.

  The invention described in claim 1 is an electrical connection box that includes a box body on which components are mounted and a cover body that covers an opening of the box body, and is attached to an attachment target, A band for co-winding and fixing the cover body; one of the box body and the cover body projects toward the other at the mating surface of the box body and the cover body; and A rib extending along the opening is provided in the vicinity of the opening, and the rib is deformed when the box body and the cover body are fixed using the band, and the box body and the cover It is an electric junction box characterized by being fixed by the band in a state where the body is in close contact.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the rib is formed in a triangular shape in a sectional view with a vertex protruding toward the other. .

  The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, the band has a clamp part for attaching to the attachment object.

  According to the first aspect of the present invention, the band main body and the cover body are provided with a band for co-winding and fixing, and either the box main body or the cover body is aligned with the box main body and the cover body. A rib protruding toward the other side and extending along the opening in the vicinity of the opening, and the rib is deformed when the box body and the cover body are fixed by the band, and the box body And the cover body are fixed by a band in close contact with each other. From this, it is possible to waterproof the mating part of the box body and the cover body with a simple shape without forming a complicated structure such as a maze structure, and it is not necessary to use a mold having a complicated shape and is inexpensive. An electric junction box that can be manufactured can be provided. Moreover, since the box main body and the cover body are always fixed in close contact with each other, waterproofness can be improved.

  According to the second aspect of the present invention, the rib is formed in a triangular shape in a sectional view with the apex protruding toward the other (the one of the box body and the cover body where the rib is not formed). For this reason, when the box body and the cover body are fixed by the band, a force pressed against the rib is applied to the apex of the rib, the rib is reliably deformed, and the box body and the cover body are more closely attached. It can be made easier and the waterproofness can be further improved.

  According to the invention described in claim 3, the band has the clamp portion for attaching to the attachment target. For this reason, it is not necessary to provide a bracket or the like for mounting on the mounting target on the box body or the cover body, and the structure can be further simplified.

It is a perspective view which shows the electrical junction box of this invention. It is the perspective view which looked at the electrical junction box shown by FIG. 1 from the other direction. FIG. 3 is an exploded perspective view of the electrical junction box shown in FIG. 2. FIG. 4 is a perspective view showing a state in which a side cover is attached in the electrical junction box shown in FIG. 3. FIG. 2 is an explanatory diagram showing a box body and a side cover in the electrical junction box shown in FIG. 1. In the electrical junction box shown in FIG. 1, it is explanatory drawing which shows the state by which the box main body and the side cover were fixed by the band. It is sectional drawing which shows the principal part of the conventional electrical junction box.

  An “electric connection box” according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5 show the band 4 in the electrical junction box 10 omitted. 5 and 6 show the side cover 2 with the hinge portion 24 and the upper cover 3 omitted.

  The electrical connection box 10 of this embodiment is installed in an engine room of a vehicle (not shown) and attached to an attachment target (not shown). The electrical junction box of the present invention is not limited to the engine room, and may be installed at other places in the vehicle. In the present embodiment, the direction indicated by the arrow X in the figure is the longitudinal direction of the electrical junction box 10, the direction indicated by the arrow Y in the figure is the width direction of the electrical junction box 10, and is indicated by the arrow Z in the figure. The direction is the height direction of the electrical junction box 10. Further, the vertical direction in the height direction is based on the vertical direction in the paper plane of FIG.

  The electrical connection box 10 includes a relay (not shown), a box body 1 to which the relay is mounted, a side cover 2 (corresponding to a “cover body” in the claims) covering the opening 14 of the box body 1, a box An upper cover 3 that covers the upper opening of the main body 1 and a band 4 that fixes the box main body 1 and the side cover 2 are provided.

  As shown in FIGS. 1 and 5, the box body 1 is formed in a box shape having a substantially rectangular shape in a plan view using a synthetic resin. The box body 1 includes a bottom wall 11, a peripheral wall 12 erected from the outer edge of the bottom wall 11, a substantially semi-cylindrical hanging part 13 that extends from one side 12 a of the peripheral wall 12 and extends below the bottom wall 11, Counter wall 15.

  As shown in FIG. 5, the bottom wall 11 is formed in a substantially rectangular shape, and has a cutout portion 111 cut out in a substantially semicircular shape from the outer edge on the side surface 12 a side (the left side in FIG. 5). ing.

  The peripheral wall 12 is provided on the surface facing the side surface 12a in the arrow X direction, and is provided in the vicinity of the upper end of the pair of surfaces facing the arrow Y direction, and the bowl-shaped band holding portion 121 that holds the band 4. And a fitting claw 122 fitted to a fitting hole 33 of the upper cover 3 described later.

  As shown in FIG. 3, the opening 14 is formed by cutting out from the upper end of the side surface 12 a of the peripheral wall 12 to the lower end of the hanging part 13. Further, portions on both sides in the arrow Y direction of the opening portion 14 are referred to as outer edges of the opening portion 14 and denoted by reference numeral 141.

  The pair of opposing walls 15 are formed so as to extend from the outer edge 141 of the opening 14 in a direction approaching each other. Further, the outer surfaces of the pair of opposing walls 15 form a mating surface with a contact surface portion 22 of the side cover 2 described later in a state where the side cover 2 is attached.

  On the outer surfaces of the pair of opposing walls 15, ribs 151 extending from the upper end to the lower end of the opposing walls 15 are provided. That is, the rib 151 extends along the opening 14 in the vicinity of the opening 14. Further, the rib 151 is formed in a triangular shape in a sectional view with a vertex protruding toward the contact surface portion 22. The rib 151 is configured to be pressed and deformed when the box body 1 and the side cover 2 are fixed by the band 4.

  The side cover 2 is formed using a synthetic resin, and is formed so as to cover the entire opening 14 in a state where the side cover 2 is fixed to the box body 1. The side cover 2 has a cover portion 21 that covers the opening portion 14, a pair of contact surface portions 22 provided on the inner surface side of the cover portion 21, and a bowl shape that is provided on the outer surface side of the cover portion 21 and holds the band 4. The band holding portion 23 and the hinge portion 24 connected to the box body 1 are provided. In the present embodiment, the box body 1 and the side cover 2 are integrally formed via the hinge part 24. However, the box body 1 and the side cover 2 are not provided in the side cover 2 without providing the hinge part 24. And may be formed separately.

  The contact surface portion 22 is provided at a position facing the outer surface of the opposing wall 15 of the box body 1 in a state where the side cover 2 is fixed to the box body 1. That is, when the side cover 2 is fixed to the box body 1, the contact surface portion 22 is configured to contact the apex of the rib 151 and press the rib 151.

  The upper cover 3 is formed integrally with the box body 1 using synthetic resin. The upper cover 3 includes a cover portion 31 that covers the upper opening of the box body 1, a hinge portion 32 that is continuous with the box body 1, and a fitting hole portion 33 that fits the fitting claw 122 of the peripheral wall 12. ing. In this embodiment, the box body 1 and the upper cover 3 are integrally formed via the hinge portion 32. However, the box body 1 and the upper cover 3 are provided with a hinge structure or the like so as to be separated. It may be formed.

  The band 4 is formed using a synthetic resin, and is provided with a band-shaped portion 41, a fixing portion 42 provided on one end side of the band-shaped portion 41, and a side opposite to the band-shaped portion 41 of the fixing portion 42. And a clamp part 43 for attaching to the object.

  The fixing portion 42 has a hole through which the other end portion 41a of the belt-like portion 41 is inserted, and is configured so that the other end portion 41a once inserted cannot be removed. Thereby, by inserting the other end portion 41a into the fixing portion 42, the band 4 becomes annular, and the band 4 can be maintained in a desired size. That is, the box body 1 and the side cover 2 can be wound together, and the box body 1 and the side cover 2 can be maintained and fixed.

  The clamp portion 43 is provided so as to protrude outward when the band 4 is fixed in an annular shape. In the present embodiment, a press-fit hole for press-fitting the clamp part 43 is formed through the attachment target of the electric connection box 10, and the electric connection box 10 is attached by press-fitting the clamp part 43 into the press-fit hole. Can be attached to the subject.

  Next, a method for assembling the electrical junction box 10 will be described.

  First, a relay (not shown) to which an electric wire is electrically connected is attached to the box body 1. At this time, the relay is put into the box main body 1 from the upper opening, and the electric wire electrically connected to the relay is put into the box main body 1 from the opening 14. Thereby, an electric wire can be easily pulled out from the hanging part 13. Next, the side cover 2 is used to cover the opening 14 of the box body 1, and the band 4 is inserted into the box body 1 and the band holding parts 121 and 23 of the side cover 2. 2 is wound together, and the other end portion 41 a of the belt-like portion 41 is inserted into the hole of the fixing portion 42. At this time, by tightening the box body 1 and the side cover 2 using the band 4, the contact surface portion 22 of the side cover 2 presses the apex of the rib 151 of the box body 1, and the rib 151 is crushed and deformed. Thus, the side cover 2 and the box body 1 are in close contact with each other. Thereby, the box main body 1 and the side cover 2 are always fixed in a closely contacted state. Finally, the upper cover 3 is attached to the box body 1 by covering the upper surface of the box body 1 with the upper cover 3 and fitting the fitting claws 122 with the fitting holes 33. Thus, the assembly of the electrical junction box 10 is completed.

  According to the electrical connection box 10 of the present embodiment, the box body 1 is provided with a band 4 that winds and fixes the box body 1 and the side cover 2 together, and forms a mating surface with the contact surface portion 22 of the side cover 2. A rib 151 that protrudes toward the side cover 2 and extends along the opening 14 in the vicinity of the opening 14 is provided on the outer surface of the facing wall 15, and the box body 1 and the side cover 2 are fixed by the band 4. At this time, the rib 151 is deformed, and the box body 1 and the side cover 2 are fixed to each other by the band 4 in a state of being in close contact with each other. Thus, the mating portion of the box body 1 and the side cover 2 can be waterproofed with a simple shape without forming a complicated structure such as a maze structure, and there is no need to use a mold having a complicated shape. It is possible to provide the electrical junction box 10 that can be manufactured at low cost. Moreover, since the box main body 1 and the side cover 2 are always fixed in close contact with each other, the waterproof property can be improved.

  Further, the rib 151 is formed in a triangular shape in a sectional view with a vertex protruding toward the side cover 2. For this reason, when the box body 1 and the side cover 2 are fixed by the band 4, a force pressed against the rib 151 is applied to the apex of the rib 151, and the rib 151 is reliably deformed. The side cover 2 and the side cover 2 can be more easily brought into close contact with each other, and the waterproofness can be further increased.

  Moreover, since the band 4 has the clamp part 43 for attaching to an attachment object, it becomes unnecessary to provide the bracket etc. for attaching to an attachment object in the box main body 1 or the side cover 2, and a structure is simplified more. Can be

  Note that the present invention is not limited to the above-described embodiments, and includes other configurations and the like that can achieve the object of the present invention, and includes the following modifications and the like.

  In the embodiment described above, the rib 151 is provided on the outer surface of the facing wall 15 that forms the mating surface of the box body 1 and the side cover 2, but the cover body of the present invention is not limited to the side cover. That is, a rib may be provided on a mating surface between the box body and another cover body such as an upper cover. In that case, the rib provided on the mating surface may be deformed by the band, and the box body and the other cover body may be fixed by the band in a close contact state.

  In the embodiment described above, the rib 151 is provided on the box body 1. However, in the electrical junction box of the present invention, it is only necessary that the rib is provided on either the box body 1 or the cover body. The side cover 2 may be provided with ribs.

  Further, the shape of the rib 151 is not limited to a triangular shape in cross section, and various shapes are considered in consideration of the ease of deformation of the rib 151 and the adhesion between the box body 1 and the side cover 2 when the rib 151 is deformed. Can be changed.

  In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the present invention has been illustrated and described primarily with respect to particular embodiments, but is not limited to the embodiments described above without departing from the scope and spirit of the present invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.

  Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

1 Box body 2 Side cover (cover body)
4 band 10 electrical junction box 14 opening 43 clamp part 151 rib

Claims (3)

A box body on which components are mounted, and a cover body that covers an opening of the box body, and an electrical connection box that is attached to an attachment target,
A band for fixing the box body and the cover body together by winding,
Either one of the box body and the cover body has a rib protruding toward the other at the mating surface of the box body and the cover body and extending along the opening in the vicinity of the opening. Is provided,
The rib is deformed when the box body and the cover body are fixed by the band, and the box body and the cover body are fixed by the band in a state of being in close contact with each other. Connection box.   The electrical connection box according to claim 1, wherein the rib is formed in a triangular shape in a sectional view with a vertex protruding toward the other side.   The electric connection box according to claim 1, wherein the band has a clamp portion for attaching to the attachment target.

Images