JP2004056968A - Rattling preventive structure of cover of electric connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent rattling of a cover with which an electric connection box is covered. <P>SOLUTION: In a rattling preventive structure of the cover 20 with which the electric connection box (fuse box) 10 having a containing section 12 of an electric part (fuse or the like) on an upper surface of a case 11 is covered, a U-shaped wall 15 of an inverted U shape is projected upward from the sidewall of the case at a position opposite to the outer surface 12a of the section 12 disposed at the sidewall side of the case 11 of the section 12. The U-shaped wall 15 has flexibility in horizontal inward and outward directions in such a manner that the lower end of the inner wall 15c projected from the folding part 15b of the upper end of the wall 15 toward a downward inside. The cover 20 is sandwiched at the wall 20b between the inner wall 15c of the wall 15 and the outer surface 12a the section 12 under pressure contact with each other. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure for preventing rattling of a cover of an electric connection box, and more particularly, to a cover for an electric connection box such as a fuse box for an automobile without looseness.
[0002]
[Prior art]
As shown in FIGS. 7A and 7B, a conventionally provided fuse box 1 has a large number of fuse accommodating portions 1a arranged side by side on a case upper surface and a locked portion 1b provided on a side surface of the case. I have. Note that the distance between the outer surface of the housing portion 1a located on one side wall of the case and the outer surface of the housing portion 1a located on the other side wall is defined as L1.
The upper surface of the case of the fuse box 1 is covered with a synthetic resin cover 2 to protect the fuse (not shown) mounted in the fuse accommodating portion 1a from dust and the like.
[0003]
As shown in FIGS. 8A and 8B, the cover 2 has a lid shape including an upper wall 2d and a side wall 2b, and has a lock portion 2a at a required position on the outer surface of the side wall 2b. A plurality of ribs 2c shown in FIG. 8C are provided at required positions on the inner surface of 2b at intervals. Note that the distance between the ribs 2c of the opposing side walls 2b of the cover 2 is L2, and the relationship is L1> L2.
[0004]
In a state where the cover 2 is placed over the fuse box 1 and the lock portion 2a is locked to the lock portion 1b, L1> L2 as described above. Therefore, as shown in FIG. It is pressed and held against the outer surface of the housing portion 1a to prevent rattling of the cover.
[0005]
[Problems to be solved by the invention]
However, vibration or the like of an automobile equipped with the fuse box 1 may be transmitted to the fuse box 1, and the ribs 2c of the cover 2 may be scraped off by friction to generate a gap. There is a problem that occurs.
In addition, since the cover 2 is made of a synthetic resin, there is a problem that it is not possible to prevent complete and permanent rattling due to deformation due to a change in ambient temperature or dimensional change due to long-term use.
[0006]
The present invention has been made in view of the above problems, and has as its object to surely prevent rattling of a cover put on an electrical junction box (ex. Fuse box).
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is to prevent rattling of a cover that covers an electric connection box having a housing for an electric component on an upper surface of the case so as to cover the electric component,
At a position facing the outer surface of the housing portion located on the case side wall side of the housing portion, an inverted U-shaped U-shaped wall projects above the case side wall,
The U-shaped wall has flexibility in horizontal inward and outward directions by making the lower end of the inner wall portion projecting downward and inward from the folded portion at the upper end a free end,
The cover has a side wall press-fitted between an inner wall portion of the U-shaped wall and an outer surface of the housing portion to provide a structure for preventing rattle of the cover of the electric junction box.
[0008]
With the above configuration, the cover for protecting electrical components such as fuses from dust and the like is pressed and held such that the inner wall of the U-shaped wall is bent and pressed against the outer surface of the housing portion, so that the side wall is pressed. Even if the cover is slightly deformed, the dimensional difference can be absorbed by the elasticity of the inner wall portion.
Further, since the inner wall portion pressed against the side wall of the cover has flexibility starting from the folded portion, the friction between the cover side wall and the inner wall portion of the U-shaped wall due to vibration of the vehicle and the like is reduced, Shaving of the inner wall is also suppressed.
Therefore, it is possible to prevent the cover from rattling against changes in the ambient temperature, long-term use, vehicle vibration, and the like, and to suppress generation of abnormal noise.
[0009]
It is preferable that a tapered portion is provided from the folded portion of the U-shaped wall, which is the insertion side of the cover side wall, to the inner wall portion.
[0010]
With the above configuration, when the cover is put on the electric junction box and the cover side wall is inserted between the U-shaped wall and the outer surface of the housing portion, the side wall of the cover is formed by the U-shaped wall and the outer surface of the housing portion. Since it is picked up by the tapered portion at the insertion port between the two, the workability of attaching the cover is improved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
The electric connection box of the present embodiment is a fuse box 10, and a large number of fuse accommodating portions 12 are arranged on the upper surface of a case 11.
A required portion of the side surface 11a of the case 11 is provided with a pair of locked portions 13 for locking a cover 20, which will be described later, and a pair of bracket portions 14 for fixing the box 10 to the vehicle body.
[0012]
A total of seven inverted U-shaped U-shaped walls 15 protrude at intervals on a side of the peripheral portion of the upper surface of the case 11 that is orthogonal to the side where the locked portion 13 is located.
As shown in FIGS. 3 and 5, the U-shaped wall 15 continuously protrudes the outer wall portion 15 a above the side surface 11 a of the case 11, protrudes the inner wall portion 15 c inward below the folded portion 15 b at the upper end, and The lower end of the portion 15c is a free end. That is, the inner wall portion 15c has flexibility in horizontal inward and outward directions starting from the folded portion 15b.
In addition, a tapered portion 15d having an inclination is provided at a portion extending from the folded portion 15b to the inner wall 15c.
[0013]
The cover 20 is for protecting a fuse (not shown) mounted in the fuse accommodating portion 12 from dust or the like, and has a lid shape having an upper wall 20c and a side wall 20b as shown in FIG. In addition, a lock portion 20a corresponding to the locked portion 13 of the fuse box 10 is provided on the side wall 20b.
[0014]
Next, a procedure for attaching the cover 20 to the fuse box 10 will be described.
As shown in FIG. 5, the side wall 20b of the cover 20 is inserted into the space between the outer surface 12a of the fuse housing 12 and the inner wall 15c of the U-shaped wall 15.
At this time, since the side wall 20b of the cover 20 is picked up by the tapered portion 15d of the U-shaped wall 15 and guided to a correct position, the workability of mounting the cover 20 can be improved.
[0015]
When the cover 20 is pushed downward as it is and the upper surface of the fuse box 10 is closed, the lock portion 20a of the cover 20 is locked and locked to the locked portion 13 of the case 11, and as shown in FIG. Is pressed and held between the inner wall portion 15c of the U-shaped wall 15 and the outer surface 12a of the fuse accommodating portion 12, and stops when the lower end of the cover side wall 20b contacts the case upper surface 16.
A fuse (not shown) mounted on the upper surface 20c of the cover 20 and the fuse accommodating portion 12 such that about 1/3 of the height of the side wall 20b of the cover 20 abuts on the inner wall portion 15c of the U-shaped wall 15. ) And keep the distance.
[0016]
With the above configuration, the side wall 20b of the cover 20 is pressed and held so that the inner wall portion 15c of the U-shaped wall 15 is bent and pressed against the outer surface 12a of the fuse accommodating portion 12, so that the cover 20 is slightly deformed. Even in this case, the dimensional difference can be absorbed by the elasticity of the inner wall portion 15c, and the flexibility of the inner wall portion 15c of the U-shaped wall 15 allows the gap between the cover side wall 20b and the inner wall portion 15c due to vehicle vibration or the like. Friction is also reduced, and shaving of the inner wall is also suppressed.
Therefore, it is possible to prevent the cover 20 from rattling against changes in the ambient temperature, long-term use, vibration of the vehicle, and the like, and suppress generation of abnormal noise.
[0017]
Although the cover 20 attached to the fuse box 10 is shown in the present embodiment, it is needless to say that the cover 20 may be used for other electric connection boxes, for example, a relay box or a junction box.
[0018]
【The invention's effect】
As is apparent from the above description, according to the present invention, the side wall of the cover is pressed and held such that the inner wall portion of the U-shaped wall is bent and pressed against the outer surface of the fuse accommodating portion. Even if it is slightly deformed, the dimensional difference can be absorbed by the elasticity of the inner wall portion, and the flexibility of the inner wall portion of the U-shaped wall allows the gap between the cover side wall and the inner wall portion due to vibration of the vehicle or the like. Is also reduced, and the shaving of the inner wall portion is also suppressed. Therefore, it is possible to prevent the cover from rattling even when the ambient temperature is changed, long-term use, vehicle vibration, and the like, and it is possible to suppress the generation of abnormal noise.
[0019]
Also, by providing a tapered portion from the folded portion of the U-shaped wall, which is the insertion side of the side wall of the cover, to the inner wall portion, when the cover is put on the electrical junction box, the cover side wall is formed with the U-shaped wall and the housing portion. Since it is picked up by the tapered portion at the insertion opening between the outer surface and guided to the correct position, the workability of attaching the cover can be improved.
[Brief description of the drawings]
FIG. 1 is a top view of a fuse box according to an embodiment of the present invention.
FIG. 2 is a side view of the fuse box.
FIG. 3 is an enlarged perspective view of a U-shaped wall.
FIG. 4 is a bottom view of the cover.
FIG. 5 is a cross-sectional view of a main part when the cover is being attached to the fuse box.
FIG. 6 is a sectional view of an essential part after a cover is attached to a fuse box.
FIG. 7A is a top view of a conventional fuse box, and FIG. 7B is a side view.
8A is a top view of a conventional cover, FIG. 8B is a bottom view, and FIG. 8C is an enlarged view of a main part.
FIG. 9 is a sectional view of a main part after a conventional cover is attached to a fuse box.
[Explanation of symbols]
10 Fuse box (electric connection box)
11 Case 12 Fuse accommodating portion 12a Outer surface 13 Locked portion 14 Bracket portion 15 U-shaped wall 15a Outer wall portion 15b Folded portion 15c Inner wall portion 15d Tapered portion 16 Case upper surface 20 Cover 20a Lock portion 20b Side wall

Claims (2)

It is intended to prevent rattling of a cover that covers an electric connection box having an electric component accommodating portion on an upper surface of the case so as to cover the electric component,
At a position facing the outer surface of the housing portion located on the case side wall side of the housing portion, an inverted U-shaped U-shaped wall projects above the case side wall,
The U-shaped wall has flexibility in horizontal inward and outward directions by making the lower end of the inner wall portion projecting downward and inward from the folded portion at the upper end a free end,
A structure for preventing rattling of a cover of an electric junction box, wherein a side wall of the cover is pressed between an inner wall portion of the U-shaped wall and an outer surface of the housing portion. The structure for preventing rattling of a cover of an electric junction box according to claim 1, wherein a tapered portion is provided from a folded portion of the U-shaped wall, which is an insertion side of the cover side wall, to an inner wall portion.

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