JP3709959B2 - Waterproof electrical component storage case - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waterproof electrical component storage case that seals and stores an electrical component body installed in, for example, an automobile.
[0002]
[Prior art]
FIG. 4 is an exploded perspective view showing a conventional example of the waterproof electrical component storage case A. When the upper case 2 is superimposed on the lower case 1, a space for accommodating the electrical component main body 3 is formed therein.
One side wall of the lower case 1 is provided with a grommet fitting hole 4 that penetrates the side wall and opens to the overlapping surface with the upper case 2. The lower surface of the upper case 2 is formed on the overlapping surface with the upper case 2. A packing 5 is attached to seal the gap.
An engagement projection 6 is provided on the side wall of the lower case 1, and an engagement frame 7 having an engagement hole 8 into which the engagement projection 6 is engaged when the upper case 2 is overlapped is provided on the upper case 2.
[0003]
An electrical component 9 such as a waterproof fusible link is attached to the electrical component body 3, the wire harness W is electrically connected via a connector (not shown), and the positioning protrusion 17 provided on the side surface is provided on the inner wall of the lower case 1. The electric component body 3 is slidably engaged with a guide rail (not shown) provided in the lower case 1 so as not to shake.
[0004]
The grommet 10 to be attached to the wire harness W is made of a rubber material or the like, and includes a cylindrical portion 10a for waterproofing and sealing the wire harness W and a flange portion 10b having a groove 10c to be fitted in the grommet fitting hole 4. is configured, when fitting the groove 10c in the grommet fitting hole 4, the gap between the grommet fitting hole 4 and grayed grommet 10 is waterproof, is sealed.
[0005]
[Problems to be solved by the invention]
Since the flange portion 10b is fitted into the grommet fitting hole 4 with elastic compression, the flange portion 10b is in close contact with the grommet fitting hole 4, but there is no structure for fixing the grommet 10 in the vertical direction. When an external force in the direction of arrow F is applied to the wire harness W, the grommet 10 moves in a direction in which it is detached from the grommet fitting hole 4.
Therefore, there is a problem that causes trouble during the assembly work of the wire harness W, a problem that the workability of superposing the upper case 2 on the lower case 1 is deteriorated, and the grommet 10 is moved and waterproof even after the assembly. The problem of deteriorating arises.
Further, when the upper case 2 is delivered without being overlapped for convenience of transportation, the grommet 10 may be detached from the grommet fitting hole 4 of the lower case 1 and damaged.
The present invention aims to solve such problems.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention accommodates an electrical component body to which a wire harness end is connected in a non-slidable manner inside, and the upper case is overlapped to form a space in the space formed with the upper case. A lower case that encloses and stores a product body, a grommet fitting hole that is provided in one side wall of the lower case so as to pass through the one side wall and open on a surface on which the upper case is superimposed, and the wire harness A grommet comprising: a tubular portion that waterproofly seals the wire harness, and a flange portion that is fitted in the grommet fitting hole and has a groove that seals a gap between the grommet fitting hole; a waterproof type electric component storage case and a grommet which is held in the grommet fitting hole by the upper case to the lower case in a state of being mounted on fitting hole are superposed A grommet pressing piece that extends through a hinge on a shaft protruding to one side of the grommet fitting hole on the one side wall, and has an engaging portion at the tip, and the grommet fitting hole on the one side wall A locking portion that can be engaged with and disengaged from the engaging portion provided on the other side, and the grommet pressing piece is rotated with the hinge as a fulcrum, and the engaging portion at the tip is engaged with the locking portion. By doing so, the tubular portion of the grommet mounted in the grommet fitting hole is pressed by the grommet pressing piece, and the gap between the grommet fitting hole is held in a sealed state by the groove of the flange. It was.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Specific examples of embodiments of the present invention will be described with reference to the drawings.
1 is an exploded perspective view of the waterproof electrical component storage case A ₁ , FIG. 2 is a perspective view of the waterproof electrical component storage case A ₁ before fixing the grommet, and FIG. 3 is a waterproof electrical component after fixing the grommet. it is a perspective view of a storage case a _1.
Among components of the waterproof electric component storage case A _1, for the conventional example and the same components will not be further described by given the conventional example the same reference numerals.
[0009]
As shown in FIG. 1, the lower case 11 of the waterproof electrical component storage case A ₁ is provided with a grommet fitting hole 4 on one side wall, similar to the conventional waterproof electrical component storage case A, and the upper case 2. The packing 5 that seals the gap with the lower end surface of the upper case 2 is attached to the overlapping surface.
Although not shown, the lower case 11 and the upper case 2 are provided with the engagement protrusions 6 and the engagement frames 7 similar to those of the conventional example, and the packing 5 is held in an overlapped state. It is the same.
[0010]
On one side wall of the lower case 11, a shaft 12 protrudes on one side (left side in FIG. 1) of the grommet fitting hole 4, and a grommet pressing piece 13 is extended on the shaft 12 via a hinge 12a.
The hinge 12a can be bent and deformed, and the grommet pressing piece 13 is rotatable about the hinge 12a.
[0011]
The grommet pressing piece 13 is formed with a concave portion 13a having an arc having substantially the same shape as the outer surface of the cylindrical portion 10a of the grommet 10, and is provided with a bent portion 13b standing upright at the front end portion of the grommet pressing piece 13. An engaging portion 14 is projected from 13b.
The engaging portion 14 is formed by an inclined surface 14a that decreases toward the tip of the bent portion 13b, and a locking surface 14b that is provided on the opposite side of the inclined surface 14a and is perpendicular to the surface of the bent portion 13b.
[0012]
On one side wall of the lower case 11, a plate-like lock portion 15 is erected on the other side (right side in FIG. 1) of the grommet fitting hole 4, and a lock hole 16 is provided in the lock portion 15.
The lock hole 16 is in a position where the engagement portion 14 can be engaged when the grommet pressing piece 13 rotates in the direction of the lock portion 15 with the hinge 12a as a fulcrum.
[0013]
A plurality of electrical components are attached to the electrical component body 3, and the tip end portion of the wire harness W is electrically connected via a connector. The wire harness W is provided with a grommet 10 that fits into the grommet fitting hole 4. The positioning projection 17 provided on the side surface of the product body 3 is slidable along the guide rail 18 provided on the inner wall surface of the lower case 11 as in the conventional example.
[0014]
A method of assembling the waterproof electrical component storage case A ₁ configured as described above will be described with reference to FIGS.
The wire harness W equipped with the grommet 10 is connected to the electrical component body 3, the positioning protrusion 17 of the electrical component body 3 is slidably engaged with the guide rail 18 (see FIG. 1), and the electrical component body 3 is moved to the lower case 11. The groove 10c of the flange portion 10b of the grommet 10 is fitted into the grommet fitting hole 4 to seal the gap between the grommet fitting hole 4 and the grommet 10 (see FIG. 2).
[0015]
Next, when the grommet pressing piece 13 is rotated with the hinge 12a as a fulcrum and pressed against the tubular portion 10a of the grommet 10, the engaging portion 14 is pushed into the lock hole 16 of the locking portion 15, and the engaging portion 14 is inclined. The surface 14 a moves in the lock hole 16 while being compressed, and when passing through the lock hole 16, the locking surface 14 b engages with the lock portion 15, and the grommet pressing piece 13 is held in a state of pressing the grommet 10. (See FIG. 3).
[0016]
Accordingly, the gap between the grommet 10 and the grommet fitting hole 4 is kept waterproof and sealed, and even if an external force is applied to the wire harness W in the direction of arrow F, or the upper case 2 is not attached to the delivery destination. Even so, the grommet 10 does not float from the grommet fitting hole 4, and the grommet 10 does not float up and interfere with the overlaying operation when the upper case 2 is superimposed on the lower case 1.
In addition, even after installing a waterproof electrical equipment storage case A ₁ in an automobile or the like, waterproof reliability is very high.
[0017]
【The invention's effect】
Since the waterproof electrical component storage case of the present invention is configured as described above, the following effects can be obtained.
(1) After the grommet is fitted into the grommet fitting hole, the grommet can be prevented from being lifted with a simple operation of rotating the grommet pressing piece and engaging the engaging portion with the lock portion.
(2) Even when the grommet is incompletely fitted in the grommet fitting hole, the grommet pressing piece pushes the grommet to the fully fitted position when the engaging part is engaged with the lock part. Therefore, after the grommet is fitted, the work for checking the fitted state is unnecessary.
[0018]
(3) By engaging the engaging part with the lock part, the grommet pressing piece completely prevents the grommet from lifting up, so there is no problem even if it is transported without attaching the upper cover. The work of overlaying on the lower cover has also become easier.
(4) Even if a waterproof electrical component storage case is installed in a vibration environment such as an automobile, the grommet will not rise and the waterproof performance will not deteriorate, so the reliability of the waterproof performance has increased.
(5) Since the shaft, hinge, and grommet pressing piece can be molded integrally with the lower case, there is no increase in parts compared to the conventional case, and it is almost the same as the conventional waterproof electrical component storage case. Can be provided at a cost.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a waterproof electrical component storage case of the present invention.
FIG. 2 is a perspective view of the waterproof electrical component storage case of the present invention before fixing the grommet.
FIG. 3 is a perspective view of the waterproof electrical component storage case of the present invention after fixing the grommet.
FIG. 4 is an exploded perspective view of a conventional waterproof electrical component storage case.
[Explanation of symbols]
A ₁ Waterproof electrical component storage case W Wire harness 2 Upper case 3 Electrical component body 4 Grommet fitting hole 10 Grommet 10a Tubular portion 10b Flange portion 11 Lower case 12 Shaft 12a Hinge 13 Grommet pressing piece 13a Recess 14 Engaging portion 15 Lock part 16 Lock hole

Claims (1)

A lower case that houses the electrical component main body to which the end of the wire harness is connected in a non-slidable manner inside, and that encloses the electrical component main body in a space that is formed together with the upper case by overlapping the upper case; A grommet fitting hole provided in an opening on a surface of the lower case that penetrates the one side wall and overlaps the upper case, and is attached to the wire harness to waterproof and seal the wire harness And a flange portion having a groove that is fitted in the grommet fitting hole and seals a gap between the grommet fitting hole and the lower case in a state of being attached to the grommet fitting hole. A waterproof electrical component storage case comprising a grommet held in the grommet fitting hole by overlapping the upper case on the upper case ,
A grommet pressing piece that is extended through a hinge to a shaft protruding to one side of the grommet fitting hole of the one side wall, and has an engaging portion at a tip portion;
A lock part that can be engaged with and disengaged from the engagement part provided on the other side of the grommet fitting hole of the one side wall,
By rotating the grommet pressing piece with the hinge as a fulcrum and engaging the engaging portion at the tip with the lock portion, the tubular portion of the grommet mounted in the grommet fitting hole is moved to the grommet. A waterproof electrical component storage case, wherein the waterproof electrical component storage case is pressed by a pressing piece and held in a state where the gap with the grommet fitting hole is sealed by the groove of the flange .

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