JP2003092817A - Case mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a case mounting structure which can improve reliability of lock for a bracket, assurance of lock and improvement in mounting property of case. SOLUTION: A rising wall 57 located at the opposite position of bending of the front end 30a is provided to the wall 12 of the case body 11 opposing to the front end 30a of a lock arm 27. The rising wall 57 is projected to the external side from the front end 30a of the lock arm 27. A surrounding part 18 surrounding the lock arm 27 is provided to the wall 12 of the case body 11, an arm bending space 22 is formed between the lock arm 27 and surrounding part 18, and a gap 58 is formed between the lock arm 27 and rising wall 57. An inserting portion which allows entry of bracket 55 is provided to the case body 11, and a flexible arm which elastically push back the bracket 55 in the opposite direction of entry is provided to the edge portion of the inserting portion. A pair of flexible arms are provided for contact with both sides of the front end portion 55c of the bracket.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case mounting structure in which a relay, a connector, a fuse and the like mounted on a bracket provided on a panel plate of a vehicle body or the like are accommodated.

[0002]

2. Description of the Related Art FIG. 7 shows an example of prior art relating to a case mounting structure described in Japanese Utility Model Laid-Open No. 4-87554.

The case 80 is composed of a case body 81 and a lid 85 that covers the upper opening of the case body 81. A lock arm 95 having a locking protrusion 98 is formed on the case body 81. On both sides of the lock arm 95, slide engagement portions 83 for the guide portions 90 of the bracket 86 are provided. In the case 80, the locking protrusion 98 of the lock arm 95 is provided in the engagement hole 86 of the bracket 86.
By engaging with a, it is fixed to the bracket 86.

The lock arm 95 has a root portion 96a protruding from the outer wall 82 of the case body 81 and a root portion 96a.
End portion 96b bent from the L shape to the L shape or the inverted L shape
It is formed from and.

The locking projection 98 is provided at the center of the free end portion 96b and has a locking surface 98a and an inclined surface 98b. The lock arm 95 is formed to be shorter than the longitudinal dimension of the bracket 86.

The case body 81 can accommodate a relay, a fuse, or the like (not shown). The case body 81 is
The bracket 86 is attached from above. That is, the slide engagement portion 83 engages with the guide portion 90, and the locking protrusion 98
Comes into sliding contact with the mounting plate 88, the lock arm 95 bends, and the case body 81 moves from the upper side to the lower side.
The locking projection 98 is engaged with the engagement hole 86a by the elastic return of the.

The bracket 86 is in the shape of a crank through a step 87, and has a mounting plate 88 on one side and a fixing plate 91 on the other side. The mounting plate 88 and the fixed plate 91 are parallel to each other. The engagement hole 86a is provided in the center of the mounting plate 88, and guide portions 90 are formed on both sides of the mounting plate 88 along the edge 89. On the other hand, the fixed plate 91 is fixed to the panel plate of the vehicle body by welding or the like.

[0008]

However, the above-mentioned conventional case mounting structure has the following problems to be solved.

First, the lock arm 95 is provided on the outer wall 8
Since the case 80 is projected outside, the tip of the lock arm 95 is caught by another component or, on the contrary, is pushed to the outer wall 82 side, so that the lock arm 95 is damaged. There's a problem.

In addition, the case 80 is attached to the bracket 86.
When the lock arm 95 is removed from the lock arm 95, the lock arm 95 must be twisted in a bending direction with a jig or the like, and there are problems that the lock arm 95 is damaged and the workability of removing the case body 81 is poor.

Further, since the mounting plate 88 of the bracket 86 is sandwiched between the slide engaging portions 83 and the lock arms 95 on both sides of the case main body 81, the guide portion 90, the slide engaging portion 83 and the mounting plate 88 are attached. There is a problem in that the case 80 cannot be smoothly attached because the locking projection 98 slides. Conversely, the mounting plate 88 of the bracket 86
If there is looseness, the positioning is not performed accurately, and the locking projection 98 of the case body 81 becomes blind,
The engagement may not be surely performed.

Further, when the locking protrusion 98 of the lock arm 95 is engaged with the engaging hole 86a of the mounting plate 88 to attach the case main body 81 to the bracket 86, the engaging hole 86 is formed.
There is a risk that play will occur between a and the locking projection 98, causing rattling of the case body.

In view of the above points, it is an object of the present invention to provide a case mounting structure which can improve the reliability of lock, the reliability of lock, and the mountability of a case with respect to a bracket on the mating side.

[0014]

In order to achieve the above object, the invention according to claim 1 is such that the locking portion of the lock arm formed in the case body is engaged with the locked portion of the mating bracket. In the case mounting structure in which the tip of the lock arm projects to the outside of the case body, the standing wall portion that faces the tip of the lock arm and is located inside the tip is a wall of the case body. It is characterized by being provided in the section.

If the standing wall portion facing the tip end portion of the lock arm is provided on the wall portion of the case body as in the above-described structure, the standing wall portion prevents the tip end portion of the lock arm from being subjected to an inadvertent external force. This prevents the lock arm from being deformed.

According to a second aspect of the invention, in the case mounting structure according to the first aspect, the standing wall portion projects from the tip end portion of the lock arm.

When the standing wall portion is projected from the tip end portion of the lock arm as in the above structure, the tip end portion of the lock arm is protected by the standing wall portion and deformation of the lock arm due to interference with the outside is prevented.

The invention according to claim 3 is characterized in that, in the case mounting structure according to claim 1 or 2, a gap is formed between the standing wall portion and the lock arm.

If a gap is formed as in the above structure, a clearance for hooking a finger on the tip of the lock arm is secured, and the lock arm can be easily bent in the unlocking direction.

Further, the invention according to claim 4 is the invention according to claim 1
The case attachment structure according to claim 3, wherein the case body is provided with an insertion portion that allows the bracket to enter, and the bracket is elastically provided at an edge of the insertion portion in a direction opposite to the insertion direction. It is characterized in that a flexible arm that pushes back to is provided.

As described above, by providing the flexible arm at the edge of the insertion portion, the tip of the bracket that enters the insertion portion contacts the flexible arm, and the bracket is positioned in the insertion direction. The flexible arm elastically pushes the bracket back in the opposite direction, the locking part of the lock arm engages with the locked part of the bracket without play, and the case is attached to the bracket without rattling. .

According to a fifth aspect of the present invention, a case mounting structure in which a locking portion of a lock arm formed on a case is engaged with a locked portion of a mating bracket and the case is attached to the bracket. In the above, a flexible arm that elastically pushes back the bracket in the opposite direction of entry is provided on the wall portion of the case facing the entry space of the bracket.

As described above, by providing the flexible arm on the wall portion of the case main body, the tip of the bracket entering the case main body comes into contact with the flexible arm, and the bracket is positioned in the entering direction. In addition, the bracket is elastically pushed back in the opposite direction to the flexible arm,
The locking portion of the lock arm and the locked portion of the bracket engage without play, and the case is fixed to the bracket without rattling.

According to a sixth aspect of the present invention, in the case mounting structure according to the fifth aspect, the tip end portion of the lock arm projects outside the case, and is located inside the tip end portion. A protective wall for protecting the portion is provided on the wall portion, and a cutout portion is formed in a part of the protective wall that is located opposite to the bending direction of the lock arm.

As in the above structure, the wall is provided with a protection wall for protecting the tip end of the lock arm, and a cutout is formed in a part of the protection wall which is located opposite to the bending direction of the lock arm. It is possible to prevent the lock arm from being damaged due to careless interference with the outside, and it is possible to bend the lock arm without difficulty by placing a finger on the tip of the lock arm.

The invention according to claim 7 is the same as claims 4 to
The case mounting structure according to claim 6, wherein a pair of the flexible arms are provided, and the flexible arms abut on both sides of a tip portion of the bracket.

As described above, by providing a pair of flexible arms, both ends of the bracket are brought into contact with the pair of flexible arms, and the case body is securely fixed to the bracket in good balance.

The invention according to claim 8 is the same as that of claim 1,
In the case mounting structure according to any one of 2, 4, 5, 6 or 7, a wall part of the case body or the case is provided with an enclosure part surrounding the lock arm, and the enclosure part and the enclosure part are provided. An arm bending space or a bracket insertion space is formed between the lock arm and the lock arm.

If the enclosure surrounding the lock arm is provided as in the above structure, the elastic limit of the lock arm is allowed to bend in the arm bending space or the bracket insertion space, and the lock arm is prevented from being excessively deformed. As a result, the lock arm is effectively protected from external interference.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 3 show a first embodiment of a case mounting structure according to the present invention.

FIG. 1 shows an electric junction box (case) 10 made of synthetic resin, and a metal bracket 55 protruding from a panel plate (not shown) of a vehicle body. Electrical junction box 1
Reference numeral 0 is composed of an electric junction box body (case body) 11 and a lid 40 which covers the upper opening of the electric junction box body 11, and the lid body 40 is detachably attached to the electric junction box body 11 by a locking means. It is designed to be used. Although the details of the locking means will be described later, the locking frame 50 of the lid body 40
Is engaged with the locking claw 25 of the main body 11 of the electrical junction box.

The bracket 55 has a plate shape and includes a fixing portion (not shown) and a mounting portion 55b, and a hole portion (locked portion) 55a is formed in the central portion thereof. Hole 55a
Is a locking protrusion (locking portion) 3 of the lock arm 27 described later.
Although it may be either a through hole or a blind hole as long as it engages with 1, the hole portion 55a is a through hole in the present embodiment.

The fixed portion is joined to the panel plate of the vehicle body by welding, bolting or the like. The bracket 55 can be joined to any position of the panel plate, but the bracket 55 shown in FIG. 1 is joined to the floor side (lower side) of the vehicle body, and the mounting portion 55b faces the roof side (upper side). ing. Therefore, the electric junction box 10 is fixed by pushing it into the bracket 55 from above to below.

When the electric junction box 10 is removed from the bracket 55, the above-mentioned mounting operation may be performed in reverse. The engagement between the locking frame 50 and the locking projection 31 is released, and the lid 40 is moved to the electrical connection box. The flexible lock arm 2 is detached from the main body 11.
Bending 7 in the unlocking direction and lifting the electric junction box main body 11 upward removes the electric junction box main body 11. With the electric junction box body 11 removed from the bracket 55, the relay (not shown), the connector (not shown), the fuse 35, and the like are stored.

The electric junction box body 11 is for accommodating and protecting a relay, a connector, a fuse 35, etc., but the electric junction box body 11 of this embodiment accommodates a plurality of fuses 35. . Each fuse 35 is housed in a housing space 37 partitioned by a partition wall 36 so as not to short-circuit with each other.

The electric junction box main body 11 has a bilaterally symmetrical shape, and has an opening 13 having an opening 13a, a bottom 14 near the bracket 55, and a cylindrical peripheral wall 15 as an outer wall (wall). 12 are formed. The pair of opposing side walls 15a has locking claws 2 for locking the locking frame 50 of the lid 40.
5 are provided. A lock arm 27 having a locking projection (locking portion) 31 and a surrounding frame (enclosing portion) 18 surrounding the lock arm 27 are formed on the front wall 15b orthogonal to the side wall 15a.

The opening 13a of the main body 11 of the electric junction box faces upward, but since the lid 40 is covered, there is no concern that water drops, dust, foreign matter, etc. will enter. The side to which the opening 13a faces may be the upper side, the lower side, or another direction.

Here, for convenience of explanation in this embodiment, the upper and lower concepts of the electric junction box 10 will be defined as follows. The side on which the lid 40 is covered with respect to the electric junction box body 11 is the upper side, and the electric junction box body 11 is a bracket 55.
The side to be attached to is the lower side. Regarding the front and rear, the side provided with the lock arm 27 is defined as the front side, and the opposite side is defined as the rear side. The left and right are symmetrical, so
No distinction shall be made except in special cases.

The surrounding frame 18 is formed integrally with the outer wall 12 so as to surround the lock arm 27 and bulges outward. The upper surface 19 of the surrounding frame 18 and the end surface 13b of the opening 13 are flush with each other. In the frame 18c of the enclosure frame 18,
The arm bending space 22 of the lock arm 27 is formed, and the tip portion 30a of the lock arm 27 projects outward from the inside 18c of the frame.

The end surface 13b of the opening 13 projects in the same direction as the projecting direction of the lock arm 27,
A ridge portion (standing wall portion) 57 for preventing interference, which faces the tip end portion 30a, and a guide rib 59 for slidably guiding the lid body 40 when the lid body 40 is placed on the electric junction box body 11. There is. The guide ribs 59 are formed at the four corners of the end surface 13b so as to project. As a result, positioning is performed when the lid 40 is covered.

The jetty portion 57 is provided inside the tip portion 30a of the lock arm 27 so as to face the tip portion 30a of the lock arm 27. That is, the jetty portion 57 is provided along the inner edge of the end surface 13b of the opening 13, and is located in the direction opposite to the bending of the tip portion 30a of the lock arm 27. Since the bending direction of the lock arm 27 is the outer direction of the electric junction box body 11, the opposite direction of the bending means the inner direction (restoring direction) of the electric junction box body 11.

A gap 58 is formed between the tip portion 30a of the lock arm 27 and the jetty 57, and the gap 58 is connected to the bracket insertion space 23. The bracket 55 enters the bracket insertion space 23,
It is adapted to engage with the lock arm 27.

The tip portion 57a of the jetty portion 57 projects to the outside of the outer wall 12 from the tip portion 30a of the lock arm 27. As a result, the lock arm 27 is protected from being caught or the like due to interference with the outside when the electric junction box body 11 is transported, and the lock arm 27 is prevented from being deformed or damaged.

The end surface 13b of the opening 13 and the end surface 44a of the abutment portion 44 of the lid 40 are formed into flat surfaces so that the both end surfaces 13b and 44a can come into close contact with each other. In this way, the electrical junction box body 11 and the lid 40
There is no backlash between and, and generation of abnormal noise is prevented. The lid 40 is locked with respect to the electric junction box body 11 by a locking means of the locking frame 50 and the locking claw 25.

As shown in FIGS. 2 and 3, the front wall 15b
An insertion hole (insertion portion) 20 for the bracket 55 is formed therethrough. The inside of the insertion hole 20 forms a bracket insertion space 23. Therefore, the front wall 1
5b has a double wall structure parallel to each other. The insertion hole 20 is formed in such a size that the bracket 55 can be slid into it. This is because, if the insertion hole 20 is too large, the bracket 55 rattles inside the hole, an abnormal noise is generated, and the bracket 55 and the lock arm 27 cannot be easily engaged with each other.

The bracket 55 is provided on the inner wall 20 of the insertion hole 20.
Guided by “a”, the vehicle approaches to a position where it abuts the inner wall 24 of the insertion hole 20. Then, the hole 55a of the bracket 55
When comes to the position of the locking protrusion 31 of the lock arm 27,
The lock arm 27 once bends outward and elastically returns by the self-restoring force, so that the locking projection 31 engages with the hole 55a.

As shown in FIG. 1 again, the electrical junction box body 1
A locking claw 25 is provided on the upper side of the outer wall 12 of the first locking claw 25. The locking claw 25 includes a locking surface 25a and a locking surface 25a.
And an inclined surface 25b that follows. The inclined surface 25b is
It is an inclined surface on which the locking frame 50 rides up, and is set to an inclination angle such that sliding resistance does not increase. Locking surface 25a
Is a vertical surface with respect to the outer wall 12 so that the locking frame 50 does not come off. The dimensions of the locking claw 25 are the same as those of the locking frame 50.
Is set to the shape and dimension corresponding to.

The lock arm 27 described above includes the front wall 15b.
Is formed integrally with and flush with. Lock arm 27
Since it has a pair of slits 28 on both sides thereof, it has a tongue shape and can be bent in the front-rear direction with the root portion 29 as a fulcrum. The free end 30 following the root 29 is parallel to the outer wall 12. Instead of forming the lock arm 27 in the shape of a tongue, a lock arm having a root portion and a free end bent from the root portion into an L-shape or an inverted L-shape is used as the inner wall 20 a of the insertion hole 20.
You may form in.

A locking protrusion 31 is provided at the center of the free end 30 of the lock arm 27 in the longitudinal direction. The locking protrusion 31 includes an inclined portion 31a, a connecting portion 31b connected to the inclined portion 31a and extending parallel to the outer wall 12, and a vertical locking portion 31c orthogonal to the connecting portion 31b. The vertical locking portion 31c is formed perpendicular to the entering direction of the bracket 55.

The periphery of the lock arm 27 is surrounded by a surrounding frame 18 so that the arm bending space 22 exists. The enclosure frame 18 includes a beam portion 18a and leg portions 18b located on both sides of the beam portion 18a and connected to the outer wall 12. The inside 18 c of the enclosure 18 is partitioned by the lock arm 27.

One space on the jetty 57 side is provided with the insertion hole 20.
The inner space of the bracket is the bracket insertion space 23 into which the bracket 55 enters. The other space on the beam portion 18a side is
It is the arm bending space 22 that allows the lock arm 27 to bend in the unlocking direction. In the arm bending space 22, the lock arm 27 is elastically deformed with the root portion 29 as a fulcrum, and the lock arm 27 can be removed from the bracket 55.

Left and right direction (width direction) of the arm bending space 22
The width W is set to such a dimension that the bending operation of the lock arm 27 can be performed without being caught. The length L in the front-rear direction is set to a length that allows elastic deformation of the lock arm 27.

The tip portion 30a of the lock arm 27 projects upward from the inside of the frame 18c. The reason for this projection is that the tip portion 30a is pushed by a finger to elastically deform the lock arm 27 in the unlocking direction. This is for releasing the lock between the bracket 55 and the lock arm 27. Jetty 57
Since a gap 58 is formed between the lock arm 27 and the lock arm 27, a clearance for hanging a finger is secured, and the unlocking operation can be easily performed. Although the protruding margin of the tip portion 30a is lower than that of the jetty portion 57, there is no problem in releasing the locking.

As shown in FIG. 1 again, the lid 40 is formed of a synthetic resin material like the electric junction box body 11, and has an outer wall 41 and an abutment portion 44 located below the outer wall 41.
It has and. The lid 40 of the present embodiment is formed separately from the electric junction box body 11, but may be integrally formed by a hinge portion or the like.

The abutment portion 44 of the lid 40 is formed in a size that fits the opening 13 of the electric junction box body 11. That is, the electric junction box main body 11 and the lid 40 have the opening 13
The end surface 13b and the end surface 44a of the abutment portion 44 are mounted in close contact with each other. As in the second embodiment described later, the upper portion of the electrical junction box body 11 is a so-called male type,
The mating portion 44 of the lid 40 may be a female type and may be fitted. With this configuration, the lid 40 is accurately positioned with respect to the electric junction box body 11, and the workability of attaching the lid is further improved.

At the lower part of the side wall 43 of the lid 40, a locking frame 50 corresponding to the locking claw 25 of the electric junction box body 11 is formed. The locking frame 50 is composed of a pair of arm portions 50b extending in the vertical direction and a hook portion 50c extending in the front-back direction across the pair of arm portions 50b. The base 5 of the pair of arms 50b
0a is connected to the side wall 43. Since the locking frame 50 is formed to be flexible around the base portion 50a as a fulcrum, the locking frame 50 can be engaged with the locking claw 25 with one touch while sliding on the inclined surface 25b of the locking claw 25. ing.

The locking claw 25 engages with the inside of the arm 50b and the inside of the hanging part 50c, and the locking surface 25a of the locking claw 25 abuts the inside of the hanging part 50c. This prevents the lock from coming off.

When the locking between the locking frame 50 and the locking claw 25 is released and the lid 40 is detached from the electric junction box body 11, a finger is hooked on the hook 50c of the locking frame 50. , The locking frames 50 on both sides may be bent so as to open outward.

The mounting method and the assembling method of the electric junction box 10 having the above structure will be described in detail below. Figure 3
As shown in (a), first, the bracket 55 is inserted into the insertion hole 20 (bracket insertion space 23) of the electric junction box body 11.
Enter while being guided by. When the sliding hole 20 slides to the front side of the inner wall 24 of the insertion hole 20, the tip portion 55c of the bracket 55 contacts the inclined portion 31a of the locking projection 31 of the lock arm 27 to bend the lock arm 27. When the hole 55a of the bracket 55 enters the position of the locking protrusion 31 of the lock arm 27, the lock arm 27 elastically returns by the self-restoring force, the hole 55a and the locking protrusion 31 engage with each other, and the locking is stopped. Done.

The inside of the hole 55a is the locking projection 31.
By contacting the vertical locking portion 31c of the electric connection box main body 11 with the bracket 55, the locking of the electric connection box body 11 is prevented.
Fixed to. Unless the lock arm 27 is bent in the unlocking direction, the electric junction box body 11 will not come off from the bracket 55. Since the inner wall 24 is formed in the insertion hole 20, the bracket 55 is prevented from hitting the inner wall 24, and the bracket 55 is prevented from penetrating the insertion hole 20.

Next, the lid 40 is covered from above the electric junction box main body 11, and the locking frame 50 provided on the side wall 43 is engaged with the locking claw 25 of the electric junction box main body 11 to be mounted. At this time, the locking frame 50 rides on the inclined surface 25b of the locking claw 25, moves downward while opening outward with the base portion 50a as a fulcrum, and moves over the inclined surface 25b so that the locking frame 50 is elastic by the self-restoring force. After returning, the locking claw 25 engages with the locking frame 50. The locking surface 25a of the locking claw 25 is brought into contact with the inside of the locking frame 50, so that the lid 40 is closed.
Is prevented from leaving.

On the other hand, as shown in FIG. 3B, when the electric connection box 10 is removed from the bracket 55 in order to perform maintenance of the fuse 35 housed inside the electric connection box 10, the lock arm 27 is used. By bending the tip portion 30a of the No. 3 with the finger in the unlocking direction, the unlocking is released, and by lifting the electric junction box body 11 upward,
The electric junction box 10 can be detached from the bracket 55.

Next, as shown in FIG. 4, a second embodiment of the case mounting structure according to the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The difference from the first embodiment is that
The point is that the collar portion 45 having the insertion piece 52 is provided on the outer wall 41 of the lid body 40.

As shown in FIG. 4, the collar portion 45 has an outer wall 41.
An insertion piece 52 that is formed so as to project substantially perpendicularly to the central portion of the collar portion 45 and that can enter the arm bending space 22 of the enclosure frame 18 of the electrical junction box body 11 is vertically provided. The insertion piece 52 is provided along the front edge portion 47 of the collar portion 45. Further, the insertion piece 52 is formed in a thin plate shape, and its corner portion 52a is formed in an arc shape. Corner section 5
By forming 2a in an arc shape, the insertion piece 52 enters the inside 18c of the surrounding frame 18 without being caught. Insert 52
Slidably slidably contacts the frame wall of the surrounding frame 18 and the back of the lock arm 27.

The arm bending space 22 in the frame 18c of the surrounding frame 18 which allows the insertion piece 52 to enter is also the insertion space 22 which allows the insertion piece 52 of the lid 40 to enter. The insertion space 22 penetrates vertically, and the insertion piece 52 is inserted from the upper opening.
Enters and allows the tip of the insertion piece 52 to be seen through the lower opening.

Since the insertion piece 52 regulates the bending of the lock arm 27 with respect to the bracket 55 in the unlocking direction, the insertion piece 52 may have a size that can be inserted into the insertion space 22. The lock arm 27 is formed by a plate thickness that is slidable on the frame wall and the back of the lock arm 27.
There is an advantage that the backlash of the bracket 55 and the backlash of the bracket 55 can be prevented, and the abnormal noise due to the vibration of the vehicle body can be prevented.

The length of the insertion piece 52 hanging down in the vertical direction is arbitrary, but the length at which the tip of the insertion piece 52 reaches the back side of the locking projection 31 of the lock arm 27 is a standard. This is because if the insertion piece 52 is too long, the insertion piece 52 may be deformed or bent due to interference with the outside.

The insertion of the insertion piece 52 into the insertion space 22 is performed in conjunction with the mounting operation of the lid 40 to the electric junction box body 11. Since the insertion space 22 is also the arm bending space 22 in which the lock arm 27 can bend, the insertion space 22
The flexure of the lock arm 27 is regulated by advancing the insertion piece 52 into the, and the flexure of the lock arm 27 is regulated, so that the bracket 55 is prevented from coming off the lock arm 27, and The reliability of locking the electric junction box 10 with respect to the bracket 55 is improved.

Next, as shown in FIG. 5, a third embodiment of the case mounting structure according to the present invention will be described. The same components as those in the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted as necessary. Connector case (case) 65 of the present embodiment
Is a connector box or other electrical junction box (not shown)
The electric connection box 10 of the first and second embodiments is directly attached to the bracket 55 of the vehicle body in that the electric junction box 10 is attached to the bracket (not shown). Further, the connector case 65 has a lock arm 27.
It is also different from the first and second embodiments in that the jetty portion 57 located in the opposite direction to the bending of the tip portion 30a is not provided.

The bracket to which the connector case 65 is attached has a plate-like shape and has substantially the same structure as that of the first and second embodiments except that it is formed on the inner wall of the electric connection box. A fixing portion connected to the inner wall and a plate-shaped mounting portion that is continuous with the fixing portion are provided, and a hole portion that engages with the locking protrusion 31 of the lock arm 27 is formed in the mounting portion.

The method of attaching the connector case 65 to the bracket is almost the same as that in the first and second embodiments, and the insertion hole 20 (bracket insertion space 79) is used.
The bracket that goes into the inside goes into the inside while bending the lock arm 27, and the self-restoring force of the lock arm 27 is used to engage the locking protrusion 31 with the hole portion, so that the connector case 6
5 is attached to the bracket.

As shown in FIG. 5, the connector case 65 will be described in detail. The connector case 65 is composed of a rectangular peripheral wall (wall portion) 66 and a lattice-shaped partition wall 67 formed inside the peripheral wall 66, and an upper portion 68 and a lower portion 69 are opened. A connector accommodating chamber 71 is formed in an empty space 70 defined by the partition wall 67. A connector (not shown) having a terminal with an electric wire is attached to the connector accommodating chamber 71 by using a locking means. As an example of the locking means, a locking claw is provided on either the inner wall 71a or the connector, and a locking hole is provided on the other side, and the locking claw and the locking hole are engaged with each other so that the locking is performed. Can be Although eight connector accommodating chambers 71 are formed in the illustrated connector case 65, the connector accommodating chamber 7
The number of 1's can be changed according to the design specifications.

On the peripheral wall 66 of the connector case 65, an electric wire holding portion 72 for holding an electric wire led out from the connector,
A plurality of locking portions 73 for attaching to an electric connection box or the like,
A bracket mounting portion 75 having the lock arm 27 and a protection wall 62 for protecting the lock arm 27 are formed.

The electric wire holding portion 72 is for bundling a plurality of electric wires led out from the end portion of the connector into one so as not to be entangled, and has a cylindrical shape capable of reducing the diameter. The bundled electric wires are drawn out to the outside of the connector case 65 and connected to various electric parts (not shown).

The locking portion 73 is provided for fixing the connector case 65 to an electric connection box or another connector case (not shown), and has a claw portion 74 having a locking surface 74a and a claw portion. The guide portion 74b is formed on both sides of the portion 74. In the drawing, the locking portion 73 is formed on the wall surface 66b on which the wire holding portion 72 is formed and another wall surface 66c that intersects the wall surface 66b at a right angle, but the locking is also performed on the remaining wall surface 66d. The part 73 may be formed.

The bracket mounting portion 75 may be formed on one wall surface of the peripheral wall 66, and in the present embodiment, the wall surface 66 orthogonal to the wall surface 66b on which the wire holding portion 72 is formed.
It is formed in a. The bracket mounting portion 75 has a wall surface 6
The surrounding wall (enclosure) 76 protruding outside 6a and having the insertion hole 20 inside, the lock arm 27 located inside the insertion hole 20, and the tip of the bracket that enters the insertion hole 20 are elastically pushed back. And a flexible arm 60.

The surrounding wall 76 is formed so as to surround the periphery of the lock arm 27 and bulges outside the wall surface 66a. Since the lock arms 27 are formed at two locations on the wall surface 66a, the surrounding wall 76 is also provided on both sides of the wall surface 66a.
It is formed in the place. The insertion hole 20 formed inside the surrounding wall 76 penetrates vertically.

The lock arm 27 is provided on the inner wall 2 of the insertion hole 20.
0a is formed in a tongue shape and extends vertically in parallel with the wall surface 66a. The lock arm 27 is arranged so as to partition the inside 75 c of the enclosure wall 76. That is, the lock arm 27 is supported in a state of floating in the frame 75c. One space partitioned by the lock arm 27 is a bracket insertion space 7 into which the bracket enters.
9, and the other space on the side of the wall surface 66a is an arm bending space 78 in the unlocking direction. Bracket insertion space 79
The positional relationship between the arm bending space 78 and the arm bending space 78 is opposite to that in the first and second embodiments.

Such a lock arm 27 has almost the same structure as that of the first and second embodiments, and therefore detailed description thereof will be omitted as necessary, but the inlet of the insertion hole 20 into which the bracket is inserted. From the root portion 29 connected to the inner side wall 20a, the free end portion 30 located on the outlet side of the insertion hole 20 following the root portion 29, and the locking projection 31 located between the root portion 29 and the free end portion 30. Has become. And
The free end portion 30 of the lock arm 27 projects outward from the upper surface 77 of the surrounding wall 76 so that the unlocking operation can be easily performed. Also, the free end 30
Can be bent with the root portion 29 as a fulcrum, so that the lock arm 2 can be pushed by pushing the free end portion 30 with a finger.
7 is bent, and the locking projection 31 can be removed from the hole of the bracket with one touch.

The flexible arm 60 is provided in the bracket insertion space 7
It is formed on the peripheral wall (wall portion) 66 of the connector case 65 facing the connector 9. That is, the flexible arm 60 includes the edge portion 20 on the inner side in the entry direction of the insertion hole 20 that allows the bracket to enter.
A pair of slits 61 are formed in the upper surface 77 of the surrounding wall 76 so as to project from the inner wall 20a substantially perpendicularly to the inner wall 20a. Flexible arm 6
0 is overhanging so as to close the outlet side of the insertion hole 20,
The overhanging length is set to such an extent that it does not hinder the unlocking operation of the lock arm 27.

The structure of the flexible arm 60 will be described. The flexible arm 60 includes a base end 60a and a base end 60a.
It is composed of an inclined portion 60b which is inclined downward, and an abutting portion 60c which is in contact with the tip portion of the bracket following the inclined portion 60b. Therefore, in detail, the flexible arm 60 is not flush with the upper surface 77 of the surrounding wall 76, but is inclined slightly downward. And this flexible arm 60
Is thin, it can be bent in the vertical direction with the base end portion 60a as a fulcrum.

By forming the flexible arm 60 in a tongue-like shape and inclining slightly downward, the self-restoring force of the flexible arm 60 when pushed by the tip of the bracket is improved,
The bracket can be pushed back in the direction opposite to the entering direction, and the locking projection 31 of the lock arm 27 and the hole of the bracket engage with each other without play, so that the locking is surely performed. The front end of the bracket abuts against the inner wall of the insertion hole 20, so that the flexible arm 60 is not deformed or damaged, and the bracket is prevented from penetrating.

In this embodiment, the flexible arm 60 is projected only from one direction, but it may be formed so as to be opposed to each other in both directions. In this way, both sides of the tip portion of the bracket can be formed. The pair of flexible arms 60 are pushed back in a well-balanced manner, and the reliability of locking the lock arm 27 and the bracket is further improved.

The protective wall 62 is provided on the peripheral wall 66 located inside the tip portion 30a of the lock arm 27. That is, the protective wall 62 is provided upright along the edge ridge of the peripheral wall 66 so as to surround the tip portion 30a of the lock arm 27 protruding outward from the upper surface 77 of the surrounding wall 76. With this configuration, when the connector is inserted into the connector accommodating chamber 71, the connector is erroneously inserted into the tip portion 3 of the lock arm 27.
The lock arm 27 is prevented from being bent or damaged by interfering with 0a.

The lock arm 27 is attached to the protective wall 62.
A notch 63 is formed in a part of the wall that is located opposite to the bending direction. The notch 63 is provided in the lock arm 27.
The width of the protective wall 62 is approximately equal to the width of the protective wall 62. As a result, the operability of the lock arm 27 is maintained without hindering the operation when the tip portion 30a of the lock arm 27 is picked up with a finger and bent.

Next, as shown in FIG. 6, a fourth embodiment of the case mounting structure according to the present invention will be described. The same components as those in the first to third embodiments described above are designated by the same reference numerals and the description thereof will be omitted. The lock arm 2 that engages with the bracket 55 on the case body 11
7 and a jetty 57 facing the tip 30a of the lock arm 27, which is the same as the first and second embodiments, and the insertion hole 20 into which the bracket 55 enters (FIG. 2). This is consistent with the third embodiment in that the flexible arm 60 is provided on the edge portion 20b on the back side of the. The difference is that the electrical junction box 10 of the first embodiment is provided with a pair of flexible arms 60 of the third embodiment.

Detailed description of the components overlapping with those of the third embodiment will be omitted if necessary, but the flexible arm 60 has an insertion hole 20 for allowing the bracket 55 to enter.
The edge portion 20b on the far side in the entry direction is formed so as to project substantially perpendicularly to the inner wall 20a (FIG. 2). That is, the flexible arm 60 is located near the tip of the lock arm 27 and between the lock arm 27 and the jetty 57, and is formed in a tongue shape by inserting a pair of slits 61 in the upper surface 19 of the enclosure frame 18. Has been done.

The pair of flexible arms 60 is the lock arm 2
7 are opposed to each other leaving a space that does not hinder the locking operation / unlocking operation of 7 and come into contact with both sides of the tip portion 55c of the bracket 55 entering the insertion hole 20. The tip portion 55c of the bracket 55 is brought into contact with the flexible arm 60, so that the bracket 55 is positioned in the approaching direction and the bracket 5
5 is elastically pushed back in the opposite direction to the entry, so that the lock arm 27 engages with the bracket 55 without rattling.

The flexible arms 60 do not have to be a pair. As shown in the third embodiment, by forming the flexible arm 60 on either side, the effect substantially similar to the above-described effect is obtained, and the electric connection box 10 is attached to the bracket 55.
Can be fixed easily and surely.

[0090]

As described above, according to the first aspect of the invention, since the standing wall portion facing the tip end portion of the lock arm is provided on the wall portion of the case body, the standing wall portion protects the lock arm. Thus, it is possible to avoid the careless application of external force to the tip of the lock arm. Therefore, the lock arm can be prevented from being deformed or damaged, and the lock reliability can be improved.

According to the second aspect of the present invention, since the standing wall portion projects from the tip end portion of the lock arm, the tip end portion of the lock arm is protected by the standing wall portion and the lock arm is prevented from interfering with the outside. Deformation is prevented. Therefore,
The lock arm can be effectively prevented from being deformed or damaged, and the lock reliability is improved.

Further, according to the third aspect of the invention, since there is a gap between the standing wall portion and the lock arm, a clearance for hanging a finger on the tip end portion of the lock arm is secured, and the lock arm is operated. The property is improved. Therefore, in addition to the effect described in claim 1, the operability of removing the case from the bracket is improved.

Further, according to the invention of claim 4, since the flexible arm is provided at the edge of the insertion portion, the tip of the bracket entering the insertion portion abuts on the flexible arm,
The bracket is positioned in the approach direction, and the bracket is elastically pushed back to the flexible arm, so that the lock arm locking portion and the bracket locked portion are engaged without play, and the case is The bracket is fixed without rattling. Therefore, in addition to the effect described in claim 1, the certainty of locking is improved.

According to the fifth aspect of the invention, since the flexible arm is provided on the wall of the case body, the tip of the bracket that enters the case body abuts the flexible arm, and Since the positioning in the approach direction is performed and the bracket is elastically pushed back to the flexible arm in the direction opposite to the approach, the locking portion of the lock arm and the locked portion of the bracket engage without play. Therefore, the case is fixed to the bracket without rattling, and the reliability of the lock is improved.

According to the invention of claim 6, since the wall is provided with a protection wall for protecting the tip of the lock arm, the protection wall protects the lock arm from inadvertent interference with the outside. However, since the notch is formed in a part of the protective wall that is located opposite to the bending direction of the lock arm, it is possible to bend the lock arm without difficulty by placing a finger on the tip of the lock arm. Therefore, the reliability of the lock can be improved without lowering the operability of the lock.

According to the invention of claim 7, since a pair of flexible arms are provided, both ends of the bracket are in contact with the pair of flexible arms, and the positioning of the bracket in the entering direction is accurate. In addition, the locking portion of the lock arm and the locked portion of the bracket tightly engage with each other without play. Therefore, the certainty of locking is significantly improved.

According to the eighth aspect of the invention, since the enclosure is provided around the lock arm, the lock arm exceeds the elastic limit by contacting the enclosure when the lock arm bends. The deformation of the arm is prevented. Therefore, the lock arm is effectively protected from interference with the outside, and the reliability of the lock can be maintained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a case mounting structure according to the present invention.

FIG. 2 is a cross-sectional view showing a main part of the case mounting structure shown in FIG.

FIG. 3 is an explanatory view of the operation of the case mounting structure,
(A) is a cross-sectional view corresponding to the locked state, and (b) is a cross-sectional view corresponding to the unlocked state.

FIG. 4 is an exploded perspective view showing a second embodiment of the case mounting structure according to the present invention.

FIG. 5 is a perspective view showing a third embodiment of the case mounting structure according to the present invention.

FIG. 6 is an exploded perspective view showing a fourth embodiment of the case mounting structure according to the present invention.

FIG. 7 is an exploded perspective view showing a conventional case mounting structure.

[Explanation of symbols]

10 Electric connection box (case) 11 Electric connection box body (case body) 12,41 Outer wall (wall) 18 Enclosure frame (enclosure part) 18c, 75c within the frame 20 insertion holes 20b edge 22,78 Arm deflection space (insertion space) 23,79 bracket insertion space 25 locking claws 27 Lock Arm 30a tip 31 Locking protrusion (locking part) 40 lid 44 Abutment 45 collar part 52 Insert 55 bracket 55a Hole (locked part) 57 Jetty (standing wall) 58 Gap 60 flexible arm 61 slits 62 Protective wall 63 Notch 65 Connector case (case) 66 Peripheral wall (wall) 75 Bracket mounting part 76 Enclosure wall (enclosure part)

Continued front page    (72) Inventor Tomoyuki Nagamine             1500 Onjuku, Susono City, Shizuoka Prefecture Yazaki Parts Co., Ltd.             Within F-term (reference) 4E360 BA08 BC04 EA03 EC05 EC12                       EC16 ED03 ED12 ED23 ED27                       ED28 GA04 GA07 GA08 GA12                       GA22 GA29 GB91                 5G361 AA06 AB12 AC02 AC04 AE01

Claims (8)

[Claims] 1. A case mounting in which a locking portion of a lock arm formed on a case body engages with a locked portion of a mating bracket, and a tip portion of the lock arm projects outside the case body. In the structure, a case mounting structure is characterized in that a standing wall portion facing the tip end portion of the lock arm and located inside the tip end portion is provided on a wall portion of the case body. 2. The case mounting structure according to claim 1, wherein the standing wall portion projects from a tip end portion of the lock arm. 3. The case mounting structure according to claim 1, wherein a gap is formed between the standing wall portion and the lock arm. 4. The case main body is provided with an insertion portion that allows the bracket to enter, and a flexible arm is provided at an edge of the insertion portion to elastically push back the bracket in a direction opposite to the insertion direction. The case mounting structure according to any one of claims 1 to 3, which is characterized. 5. A case mounting structure for engaging a locking portion of a lock arm formed on a case with a locked portion of a mating bracket to attach the case to the bracket, wherein a space for entering the bracket is provided. A case mounting structure, characterized in that a flexible arm that elastically pushes back the bracket in a direction opposite to the approaching direction is provided on a wall portion of the case facing the case. 6. A tip of the lock arm is projected to the outside of the case, and a protection wall is provided inside the tip to protect the tip, and the wall is provided with a protection wall. 6. The case mounting structure according to claim 5, wherein a cutout is formed in a part of the protective wall located opposite to. 7. The case according to claim 4, wherein a pair of the flexible arms are provided, and the flexible arms abut on both sides of the tip portion of the bracket. Mounting structure. 8. The case body or a wall portion of the case is provided with an enclosure portion surrounding the lock arm, and an arm bending space or a bracket insertion space is formed between the enclosure portion and the lock arm. The case mounting structure according to any one of claims 1, 2, 4, 5, 6, and 7, wherein: