JP2973848B2 - Electrical component box fixing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing an electrical component box such as a junction box to a base without looseness.

[0002]

2. Description of the Related Art Conventionally, in order to protect an electrical component box for a vehicle such as a relay box or a junction box from heat of an engine or to reduce the number of mounting points on a vehicle body, a box for an auxiliary device is conventionally provided. It is housed and fixed. In this configuration, conventionally, in order to fix a junction box or the like to the accessory box, a highly reliable bolting structure is generally used.

[0003]

However, the above-mentioned bolted structure has a drawback that the manufacturing cost is increased due to the large number of work steps. In order to cope with this, for example, it is conceivable to adopt a general one-touch lock structure in which an elastic lock claw protrudes from the auxiliary device box side and is engaged with an engagement portion of the electrical component box. This structure has a large amount of rattling, and particularly in a vehicle, there is a possibility of causing a malfunction or the like of the relay due to vibration during traveling, which is not preferable.

[0004] The present invention has been made in view of the above circumstances, so-called one-touch mounting is possible, the number of work steps for fixing the electrical component box is small, and it is possible to fix without rattling and high reliability. An object of the present invention is to provide a fixing structure for an electrical component box.

[0005]

According to the present invention, there is provided an electric component box fixing structure, comprising an auxiliary device box in which a box body is closed by a lid.
This is a structure for fixing the electrical component box in the
The base provided on the box body and the electrical component box
And the electrical component box protruding from the base and attached to the base
Allows the electrical component box to be mounted while entering the engagement hole
And the electrical component box was mounted in the correct position
Sometimes elastically restored and engages with the opening edge of the engagement hole
Locking claw and the engaging hole provided in the lid of the accessory box
A lock that prevents escape of the lock claw by being inserted
The present invention is characterized in that a shape preventing member is provided .

[0006]

[0007]

[0008]

In the above configuration, to fix the electrical component box,
Press the electrical component box against the base side of the box body of the accessory box ,
The lock claw of the base is advanced into the engagement hole. Then, the locking claw is deformed so as to allow the mounting of the electrical component box along with the mounting of the electrical component box on the base, and is elastically restored when the electrical component box is mounted in the proper position. It will engage with the opening edge of the mating hole. After this, the accessory box
When the lid is closed, the deformation preventing member provided on the lid engages with the engagement hole.
To prevent the locking claw from escaping, and the locking claw is engaged with the engagement hole of the electrical component box without play.

[0009]

[0010]

[0011]

As described above, according to the junction box of the present invention, it is possible to perform one-touch mounting by pressing the electrical component box against the base side, and it is not necessary to tighten bolts or the like, so that the electrical component box is fixed. The number of man-hours for the work is reduced. In addition, since the escape deformation of the lock claw is reliably prevented, the electrical component box can be fixed to the base without rattling, thereby improving reliability.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a junction box fixing structure will be described below with reference to the drawings.

As shown in FIG. 2, reference numeral 10 denotes a plastic accessory box fixed in an engine room of a vehicle, for example, and an open surface 11a of a box body 11 having an open upper surface.
Is closed by a lid 12, and the lid 12 (see FIG. 1) is fastened and fixed to the box body 11 by bolts (not shown). The auxiliary box 10 collectively houses a junction box 20 and a relay box (not shown) corresponding to an electric component box, and protects various electric components from engine heat. I have.

As shown in the figure, a base 13 bulges into a rectangular base and is integrally formed on the bottom of the box body 11 of the accessory box 10, and, for example, three lock claws are provided via a support 13a. 14 extends upward and protrudes. Each locking claw 14 is an elastic piece 15 that rises upward from the base 13.
And a locking claw portion 16 provided at the tip of the elastic piece portion 15. Each elastic piece portion 15 is protruded substantially at the center of each side of the base 13 so that two pieces are opposed to each other. Each locking claw portion 16 has an inclined surface 16a projecting outward and obliquely upward. A guide rib 17 protruding inward is integrally formed on the inner surface of the base of the elastic piece portion 15, and the protrusion dimension of the guide rib is increased toward the lower side to form an inclined surface 17a.

On the other hand, the junction box 20
Is also made of plastic and comprises a lower case 21 having a rectangular box shape as a whole and an upper case 22 covering the open surface thereof. The lower case 21 is provided with a notch 23 that fits into the base 13 from the outside and penetrates vertically. The upper case 22 is provided with a thick portion 24 that fits into the notch 23, and an engaging hole 25 is formed in the upper case 22 so as to penetrate vertically. The engagement hole 25 has a square hole shape capable of accommodating the support portion 13a and the elastic piece 15 of the lock claw 14. The thickness of the thick portion 24 is determined by the engagement claw 16 at the tip of the lock claw 14. The dimensions are such that they can protrude upward through the engagement hole 25. The engagement hole 25 has a tapered shape that becomes wider toward the lower side (the base 13 side).

A substantially prismatic deformation preventing member 30 is integrally formed on the lid 12 of the accessory box 10.
This is a dimension that can be inserted between the three lock claws 14, and the protruding height dimension is such that the lid 12 is attached to the accessory box 10.
Is set to a value such that the distal end of the deformation preventing member 30 almost reaches the base end of the lock claw 14 when it is mounted on the box main body 11. A guide groove 31 is formed on the outer surface of the deformation preventing member 30 so as to extend vertically (in the extending direction of the lock claw 14) so as to correspond to the guide rib 17 of the lock claw 14. When inserted in between, the guide ribs 17 enter the guide grooves 31. In addition, the bottom surface of the guide groove 31 is inclined according to the inclined surface 17a of the guide rib 17, and is attached so that these lock claws 14 are deformed outward by inserting the deformation preventing member 30 between the lock claws 14. Be inspired.

To fix the junction box 20 in the accessory box 10 in the above configuration, the following operation is performed. First, the upper case 22 and the lower case 21 are integrated, and the junction box 20 is closed. Then, the junction box 20 is accommodated in the box body 11 of the accessory box 10 with the lid 12 opened, and the engagement hole 2 of the junction box 20 is accommodated.
The junction box 20 is pressed against the base 13 so that the lock claw 14 of the auxiliary device box 10 enters into 5. Then, the base 1 of the junction box 20
With the attachment to the third side, the locking claw 16 of the lock claw 14 is pushed against the inner wall surface of the engagement hole 25, and the elastic pieces 15 are elastically moved inward (in the direction of narrowing the gap) as shown in the figure. As a result, the junction box 20 is allowed to be mounted.

Then, when the bottom surface of the junction box 20 reaches a regular position where it comes into contact with the top surface of the base 13,
As shown in FIG. 5, the lock claw 14 is elastically restored, comes into engagement with the opening edge 25 a of the engagement hole 25, and the junction box 20 is sandwiched between the base 13 and the lock claw 14. Is fixed. Thereafter, when the lid 12 of the accessory box 10 is attached to the box body 11, the lid 12
Of the lock claw 14 is inserted between the lock claws 14, and is guided to the normal position by the guide action by the fitting of the guide rib 17 and the guide groove 31, and the lock claw 14 is moved outward (the lock claw 14 and the opening edge 25 a). (In a direction to deepen the engagement of the two) (see FIG. 6). Thereby, the junction box 20 is firmly fixed to the base 13.

As described above, according to the present embodiment, the lock claw 14 is moved to the junction 13 by a simple operation of pressing the junction box 20 against the base 13 to cause the lock claw 14 to enter the engagement hole 25. Box 2
The junction box 20 is resiliently restored when the junction box 20 is mounted at a proper position and engages with the opening edge of the engagement hole 25 when the junction box 20 is mounted at a proper position.
Therefore, so-called one-touch mounting is possible, and bolt tightening or the like which has been required in the past becomes unnecessary, so that the number of working steps for fixing the junction box 20 is very small, and the manufacturing cost can be reduced accordingly. . Moreover, after mounting the junction box 20,
Since the deformation preventing member 30 can be inserted into the engaging hole 25 to prevent the locking claw 14 from escaping, the engagement between the locking claw 14 and the junction box 20 does not rattle, and vibration is suppressed. Reliability can be improved.

In this embodiment, the deformation preventing member 30 is particularly used.
Is provided integrally with the lid 12 of the auxiliary device box 10, so that when the lid 12 is closed, the deformation preventing member 30 provided on the lid 12 is provided.
Naturally prevents the locking claws 14 from escaping and deforming, which is very reasonable. Further, particularly in this embodiment,
When the deformation preventing member 30 enters, the deformation preventing member 30 is guided by the fitting of the guide groove 31 and the guide rib 17, and the lock claw 14 can be urged in the expanding direction by the presence of the inclined surface 17a. The engagement between the junction box 20 and the lock claw 14 becomes tighter, which is more effective in suppressing vibration.

<Other Embodiments> The present invention is not limited to the above-described embodiments. For example, the following embodiments are possible, and these are also included in the technical scope of the present invention.

(1) In the above embodiment, the present invention is applied to the fixing structure for fixing the junction box to the accessory box. However, the present invention is not limited to this. For example, the present invention is applied to the case where the relay box is fixed to the accessory box. The present invention is also applicable to a case where the accessory box is fixed to the vehicle body.

(2) The lock claws are not necessarily provided in pairs so as to face each other, and a configuration in which one lock claw protrudes from one base may be used.

In addition, the present invention is not limited to the embodiment described above with reference to the drawings, and can be variously modified and implemented without departing from the gist.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is an enlarged perspective view showing a main part thereof.

FIG. 2 is a plan view of the accessory box.

FIG. 3 is an enlarged sectional view showing a state before a junction box is attached.

FIG. 4 is an enlarged sectional view showing a mounting process of the junction box.

FIG. 5 is an enlarged sectional view showing a state where a junction box is attached.

FIG. 6 is an enlarged sectional view showing a state where a lid of the accessory box is attached.

FIG. 7 is an enlarged plan view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Auxiliary box (electrical component box) 11 ... Box main body 12 ... Lid 13 ... Base 14 ... Lock claw 17 ... Guide rib 17a ... Slope surface 20 ... Junction box 21 ... Lower case 22 ... Upper case 25 ... Engagement hole 25a: Opening edge 30: Deformation preventing member 31: Guide groove

Claims (1)

(57) [Claims] An auxiliary device wherein the box body is closed by a lid.
In the structure for fixing the electrical component box in the box,
A base provided in the box body of the accessory box;
An engagement hole provided in the product box;
As the electrical component box is mounted on the base,
Escapes and deforms to allow installation of the electrical component box while entering
When the electrical component box is installed in the correct position, it is elastically restored.
A locking claw that engages with an opening edge of the engagement hole,
It is provided on the lid of the accessory box and is inserted into the engagement hole.
To prevent the lock claw from escaping.
A fixing structure for an electrical component box, comprising: a shape preventing member .