JPH08172713A - Structure for fixing electric device box - Google Patents

Abstract

PURPOSE: To obtain a fixation structure which can be mounted and attached at a touch, which reduces the number of fixation operations of an electric device box and which can be fixed without rattle. CONSTITUTION: A base 12 is molded integrally at the bottom face part of a box body for an auxiliary box so as to swell in a rectangular trapezoidal shape, and three lock claws 14 are installed at the base so as to protrude upward. A junction box 20 is constituted of a rectangular box-shaped lower-part case 21 and of an upper-part case 22. A cutout part 23 which is fitted to the base 13 from the outside is formed in the lower-part case 21 so as to be passed up and down. A thick part 24 which is fitted into the cutout part 23 is formed at the upper-part case 22. The lock claws 14 are coupled to coupling hole parts 25 formed in the thick part 24, the junction box 20 is fixed to the base 13, a deformation-preventing member 30 is inserted between the lock claws 14, and the relief deformation of the lock claws 14 is prevented.

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 electric equipment box such as a junction box which can be fixed to a base without rattling.

[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 collectively installed. It is housed and fixed. In this configuration, conventionally, in order to fix the junction box and the like to the auxiliary device box, it is general to employ a highly reliable bolt tightening structure.

[0003]

However, the above-described bolt tightening structure has a drawback that the manufacturing cost becomes high because of the large number of working steps. To deal with this, for example, a general one-touch lock structure in which an elastic lock claw is projected on the auxiliary device box side and is engaged with an engaging portion of the electrical component box may be considered, This structure has a large amount of rattling, and particularly in a vehicle, it may cause a malfunction of the relay due to vibration during traveling, which is not preferable.

The present invention has been made in view of the above circumstances, so-called one-touch mounting is possible, the number of man-hours required for fixing the electrical component box is small, and moreover, it can be fixed without rattling and is highly reliable. An object is to provide a fixing structure for an electrical component box.

[0005]

A fixing structure for an electric component box according to the present invention is a structure for fixing the electric component box to a base, and includes an engaging hole portion provided in the electric component box and a base. When the electrical component box is mounted in the normal position by projecting on the base and entering the engagement hole when the electrical component box is mounted on the base side and escaping to allow the electrical component box to be mounted. Lock claw that elastically restores to the end and engages with the opening edge of the engagement hole, and deformation prevention that prevents the escape of the lock claw by being inserted into the engagement hole after mounting the electrical component box It is characterized by including a member (the invention of claim 1).

Further, in the structure for fixing the electrical equipment box in the accessory box in which the box body is closed by the lid, the base provided in the box body of the accessory box and the electrical equipment box are With the provided engagement holes, the electrical components that protrude from the base and escape into the engagement holes as the electrical equipment box is mounted on the base while allowing the electrical equipment box to be mounted By the lock claw that elastically restores to engage with the opening edge of the engagement hole when the box is mounted in the regular position, and by being inserted into the engagement hole provided in the lid of the accessory box A deformation prevention member for preventing escape of the lock claw can be provided (the invention of claim 2).

In the first or second aspect of the present invention, a plurality of lock claws are arranged side by side so as to face each other, and at the same time, the lock claws can be escaped and deformed in a direction of narrowing the interval between them, and the deformation preventing member is provided with a plurality of deformation prevention members. It may be configured to be inserted between the lock claws (the invention of claim 3). Further, in the invention of claim 3, a guide rib extending along the extension direction of the lock claw is provided on the surface side of the lock claw facing each other, and a guide rib is inserted into the outer peripheral surface of the deformation preventing member. It is also possible to form a groove and form an inclined surface for urging the lock claw in the direction of expanding the lock claw with at least one of the guide rib and the guide groove (the invention of claim 4). .

[0008]

In the above structure, in order to fix the electrical component box,
The electrical equipment box is pressed against the base, and the lock claw of the base is inserted into the engagement hole. Then, the lock claws escape and deform as the electrical component box is mounted on the base to allow the electrical component box to be mounted, and elastically restore when the electrical component box is mounted in the normal position. It will engage with the opening edge of the dowel. After that, when the deformation prevention member is inserted into the engagement hole,
The escape deformation of the lock claw is prevented, and the lock claw engages with the engagement hole of the electrical component box without rattling.

According to the second aspect of the invention, when the lid of the auxiliary device box is closed, the deformation preventing member provided on the lid prevents the escape deformation of the lock claw.

According to the third aspect of the invention, the deformation preventing member is inserted between the plurality of opposed lock claws to prevent the lock claw from being deformed. In the fourth aspect of the invention, the guide groove and the guide rib are formed when the deformation preventing member is inserted. The deformation preventing member is guided by the fitting of the lock member, and the presence of the inclined surface urges the lock claw in the expanding direction to further tightly engage the electrical component box.

[0011]

As described above, according to the junction box of the present invention, it is possible to perform one-touch mounting by pressing the electric component box against the base side, and it is not necessary to tighten bolts, etc., so that the electric component box can be fixed. The number of man-hours required for is small. Moreover, since the escape deformation of the lock claw is surely prevented, the electric component box can be fixed to the base without rattling, and the reliability can be improved.

[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.
The lid 12 is closed by a lid 12, and the lid 12 (see FIG. 1) is fastened and fixed to the box body 11 by a bolt (not shown). A junction box 20 and a relay box (not shown), which correspond to an electrical equipment box, are collectively housed in the accessory box 10 to protect various electrical equipment from engine heat. There is.

As shown in the figure, a base 13 bulges into a rectangular trapezoidal shape and is integrally molded on the bottom surface of the box body 11 of the accessory box 10, and there are, for example, three locking claws through the pillar portion 13a. 14 extends upward and is projected. Each locking claw 14 has 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 provided so as to project substantially at the center of each side portion of the base 13 so that the two pieces face each other. Each locking claw portion 16 has an inclined surface 16a that projects outward and is obliquely upward. A guide rib 17 that projects inward is integrally formed on the inner surface of the base of the elastic piece portion 15, and the projecting dimension of the guide rib is increased downward to form an inclined surface 17a.

On the other hand, the junction box 20
Is also made of plastic and is composed of 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 so as to vertically penetrate therethrough. Further, the upper case 22 is provided with a thick portion 24 that fits into the cutout portion 23, and an engaging hole portion 25 is vertically formed therethrough. The engagement hole portion 25 has a square hole shape capable of accommodating the pillar portion 13a and the elastic piece portion 15 of the lock claw 14, and the thickness of the thick portion 24 is the same as that of the locking claw portion 16 at the tip of the lock claw 14. The size is such that it can penetrate the engaging hole portion 25 and project upward. The engagement hole 25 has a taper shape that widens downward (toward the base 13).

Further, the lid 12 of the accessory box 10 is integrally molded with a substantially prismatic deformation preventing member 30.
This is a size that can be inserted between the three lock claws 14, and the protruding height is such that the lid 12 and the accessory box 10 are
It is set to such a value that the tip end of the deformation preventing member 30 almost reaches the base end portion of the lock claw 14 when it is mounted on the box body 11. A guide groove 31 extending vertically (in the extending direction of the lock claw 14) is formed on the outer surface of the deformation prevention member 30 so as to correspond to the guide rib 17 of the lock claw 14. When inserted in between, the guide ribs 17 are adapted to enter the guide grooves 31. The bottom surface of the guide groove 31 is inclined to match the inclined surface 17a of the guide rib 17, and the lock claws 14 are deformed outward by inserting the deformation prevention member 30 between the lock claws 14. Energized.

In order to fix the junction box 20 in the auxiliary device box 10 having the above structure, the following work is performed. First, the upper case 22 and the lower case 21 are integrated and the junction box 20 is kept closed. Then, the junction box 20 is housed in the box body 11 of the accessory box 10 with the lid 12 opened, and the engagement hole portion 2 of the junction box 20 is accommodated.
The junction box 20 is pressed against the base 13 so that the lock claw 14 on the side of the auxiliary device box 10 enters the device 5. Then, the base 1 of the junction box 20
As it is attached to the third side, the locking claw portion 16 of the lock claw 14 is pushed against the inner wall surface of the engagement hole portion 25, and the elastic piece portions 15 elastically move inward (directions in which the intervals are narrowed) as shown in the figure. It deforms, and thus allows the mounting of the junction box 20.

When the bottom surface of the junction box 20 reaches the normal position where it abuts on the top surface of the base 13,
As shown in FIG. 5, the lock claw 14 elastically restores to engage with the opening edge portion 25 a of the engagement hole 25, and the junction box 20 is sandwiched between the base 13 and the lock claw 14. It will become fixed and will be fixed. After that, if the lid 12 of the accessory box 10 is attached to the box body 11, the lid 12
Of the deformation preventing member 30 is inserted between the lock claws 14 and is guided to the regular position by the guiding action by the fitting of the guide ribs 17 and the guide grooves 31, while the lock claws 14 are moved to the outside (the lock claws 14 and the opening edge portion 25a). (In the direction of deepening the engagement of) (see FIG. 6). As a result, the junction box 20 is firmly fixed to the base 13.

As described above, according to this embodiment, the lock claws 14 are joined by the simple work of pressing the junction box 20 toward the base 13 and inserting the lock claws 14 into the engagement holes 25. Box 2
When the junction box 20 is mounted in the normal position, it elastically restores to engage with the opening edge of the engaging hole 25 when the junction box 20 is mounted in the normal position.
Therefore, so-called one-touch mounting is possible, and bolt tightening, etc., which has been indispensable in the past, is not required, so the number of work steps for fixing the junction box 20 can be very small, and the manufacturing cost can be suppressed to that extent. . Moreover, after mounting the junction box 20,
Since the deformation preventing member 30 can be inserted into the engagement hole portion 25 to prevent escape deformation of the lock claw 14, the engagement between the lock claw 14 and the junction box 20 does not rattle, and vibration is suppressed. Reliability can be improved.

Further, particularly in this embodiment, the deformation preventing member 30 is used.
Since the cover 12 is integrally provided on the lid 12 of the accessory box 10, when the lid 12 is closed, the deformation preventing member 30 provided on the lid 12 is closed.
However, the lock claws 14 are naturally prevented from deforming, which is very rational. Further, especially in this embodiment,
Since the deformation preventing member 30 is guided by the fitting of the guide groove 31 and the guide rib 17 when the deformation preventing member 30 enters, the lock claw 14 can be urged in the expanding direction due to the existence of the inclined surface 17a. Engagement between the junction box 20 and the lock claw 14 becomes even tighter, which is more effective in suppressing vibration.

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

(1) In the above embodiment, the junction box is applied to the fixing structure for fixing it to the auxiliary equipment box. However, the present invention is not limited to this, and is applied to the case where the relay box is fixed to the auxiliary equipment box. It is also possible to apply it when fixing the auxiliary device box to the vehicle body side.

(2) The lock claws are not necessarily provided as a pair so as to face each other, but one lock claw may be provided so as to project from one base.

Besides, the present invention is not limited to the embodiments described by the above description and the drawings, but can be variously modified and implemented within the scope not departing from the gist.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view showing an essential part of an embodiment of the present invention.

FIG. 2 is a plan view of the auxiliary device box.

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

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

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

FIG. 6 is an enlarged sectional view showing a state in which a lid of an auxiliary device box is attached.

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

[Explanation of symbols]

 10 ... Auxiliary equipment box (electrical equipment box) 11 ... Box body 12 ... Lid 13 ... Base 14 ... Lock claw 17 ... Guide rib 17a ... Inclined surface 20 ... Junction box 21 ... Lower case 22 ... Upper case 25 ... Engagement hole 25a ... Opening edge 30 ... Deformation prevention member 31 ... Guide groove

Claims (4)

[Claims] 1. A structure for fixing an electrical component box to a base, wherein an engagement hole portion provided in the electrical component box and a protrusion projecting from the base to the base side of the electrical component box. When the electric component box is attached to the regular position, it elastically restores when the electric component box is attached to the normal position, and it is deformed so as to allow the electric component box to be attached. Electrical equipment comprising a lock claw that engages with the opening edge of the portion, and a deformation prevention member that is inserted into the engagement hole after mounting the electrical component box to prevent the escape deformation of the lock claw. Fixed structure of product box. 2. A structure for fixing an electrical equipment box in an auxiliary equipment box in which the box body is closed by a lid,
A base provided in the box body of the accessory box, an engagement hole provided in the electrical equipment box, and a mounting on the base of the electrical equipment box protruding from the base While entering into the engagement hole, it escapes and deforms so as to allow mounting of the electrical component box, and elastically restores when the electrical component box is mounted in the regular position to form an opening edge portion of the engaging hole portion. Fixing of an electrical equipment box including a locking claw that engages and a deformation prevention member that is provided in the lid of the accessory box and that prevents the escape deformation of the locking claw by being inserted into the engagement hole Construction. 3. The lock claws are erected side by side so as to be opposed to each other, and can be escaped and deformed in a direction of narrowing an interval therebetween, and the deformation preventing member is inserted between the plurality of lock claws. The fixing structure for the electrical component box according to claim 1 or 2. 4. A guide groove formed on the surface of the lock claw facing each other so as to extend along the extension direction of the lock claw, and a guide groove into which the guide rib is inserted on the outer peripheral surface of the deformation preventing member. 4. An inclined surface is formed on at least one of the guide rib and the guide groove to urge the lock pawl in a direction of expanding the lock pawl when the deformation preventing member is inserted. Fixed structure of the electrical equipment box described.