JPH10215077A - Waterproof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a container with improved waterproof characteristics by providing a through hole at a body part with a closed inner space and an auxiliary container with a space to connect the through hole to the outside. SOLUTION: In an enclosure 10 that is formed, for example, by an aluminum die cast, a body part 111 for accommodating, for example, the electronic parts of an electronic equipment is provided, an opening part is provided at the body part 111, and the enclosure 10 is mounted to the opening so that a lid part 12 that is formed, for example, by a resin closes the body part 111, for example by an adhesive. Then, the body part 111 and the auxiliary container 112 are connected by a connection part 114, and the inner space is connected by a through hole 113 being provided at a connection part 114. Also, a lid part 14 that is formed, for example by aluminum die cast is screwed, for example, by screws to an opening at the opposite side of a surface where the through hole 113 of the auxiliary container 112 is formed via a gasket 13 so that the auxiliary container 112 is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for electronic equipment and the like, and more particularly to a waterproof structure for a housing configured to prevent intrusion of rainwater, muddy water and the like.

[0002]

2. Description of the Related Art In an electronic device mounted outside a vehicle compartment, such as an automobile or a construction machine, which is easily exposed to rainwater or muddy water,
There is a demand for a waterproof structure of a housing for strongly preventing intrusion of rainwater, muddy water and the like. For this reason, waterproofing is performed by a method in which the electronic component is subjected to a potting process with a resin and then stored in a housing, or a method in which the electronic component is disposed in a closed container.

[0003]

However, depending on the type of electronic component, there are components (for example, antennas) that cannot be potted, and in a method using a sealed housing, the larger the volume, the better the sealed quality in manufacturing. In addition, there is a problem that it is difficult to maintain the hermetically sealed state because the influence of the change in the gas volume due to the temperature change becomes large.

An object of the present invention is to solve such a problem.

[0005]

SUMMARY OF THE INVENTION The present invention solves such a problem. In a waterproof structure of a housing of an electronic device, a main body having a sealed internal space and a main body provided in the main body are provided. It has a through hole and an auxiliary container having a space provided to connect the through hole and the outside.

Further, a part of an outer wall of the auxiliary container is formed by an outer wall of the main body. Also,
An internal wall is provided inside the auxiliary container. Further, a content for reducing the volume of the internal space is provided in the internal space of the main body.

[0007] Further, a rotation mechanism for downwardly pointing an outside air hole of the auxiliary container which communicates with the outside air is provided. Further, the auxiliary container is formed on a bracket for fixing the main body to an object to be mounted.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a housing structure according to a first embodiment of the present invention. Reference numeral 10 denotes a casing formed by aluminum die casting or the like, in which a main body 111 for accommodating electronic components and the like of an electronic device (not shown) is connected to an auxiliary container 112 serving as an air passage for the outside air (or 10). Integral molding). An opening (left end in the figure) is provided in the main body 111, and a lid 12 molded of resin or the like is attached to the opening with an adhesive or the like so as to seal the main body 111.

The auxiliary container 112 has a space of a predetermined capacity or more, and has an outside air hole 116 on the side surface (lower end in the figure) communicating with the outside air.
Is provided. Then, the main body 111 and the auxiliary container 1
12 are connected by a connecting portion 114, and the internal space thereof is also connected by a through hole 113 provided in the connecting portion 114. The auxiliary container 112 has an opening on the side opposite to the surface on which the through-hole 113 is formed. The opening is formed by aluminum die casting or the like via a gasket 13 so as to seal the auxiliary container 112. The cover 14 is screwed with a screw or the like.

[0010] In the housing 10 having the above-described structure, the main body 111 containing electronic parts and the like is directly sealed in the body 111.
No water enters. Further, even if the temperature fluctuates greatly (from high temperature to low temperature), air enters through the outside air holes 116 and the through holes 113, so that the pressure inside the main body 111 does not remain lower than the outside air pressure. It does not occur that moisture is sucked from the fine holes such as the bonding surface of No. 12. If the capacity of the auxiliary container 112 is sufficiently larger than the volume change of the air inside the container due to the temperature change, even if the external air holes 116 are in the water, the water accumulates in the auxiliary container 112 and the water is sucked into the main body 111. It will not be.

FIG. 2 is a sectional view showing a housing structure according to a second embodiment of the present invention. Reference numeral 20 denotes a casing formed by aluminum die-casting or the like, and is integrally molded so that a main body 211 for housing electronic components and the like and an auxiliary container 212 serving as an air passage for the outside air are separated by a side wall 25. .
An opening (left end in the figure) is provided in the main body 211, and a lid 12 molded of resin or the like is attached to the opening with an adhesive or the like so as to seal the main body 211. A through hole 213 communicating with the internal space of the main body 211 and the internal space of the auxiliary container 212 is provided in the vicinity of the upper end of the side wall 25 separating the main body 211 and the auxiliary container 212.

An outside air hole 216 communicating with the outside air is provided on the side surface (the lower end in the figure) of the auxiliary container 212. Further, a lid 14 formed by aluminum die casting or the like through a gasket 13 is screwed to the opening (the opening at the right end in the figure) of the auxiliary container 212 via a gasket 13 so as to seal the opening. . In the housing 20 having the above-described configuration, water does not directly enter the inside of the main body 211 that houses and seals electronic components and the like. Further, even if the temperature fluctuates greatly (from high temperature to low temperature), since air enters through the outside air holes 216 and the through holes 213, the state in which the pressure inside the main body 211 is lower than the outside pressure does not continue. It does not occur that moisture is sucked from the fine holes such as the bonding surface of No. 12. If the capacity of the auxiliary container 212 is sufficiently larger than the volume change of the air inside the container due to the temperature change, even if the outside air holes 216 are in the water, the water accumulates in the auxiliary container 212 and the water is sucked into the main body 211. It will not be. In the present embodiment, the main body 21
1 and the auxiliary container 212 share the side wall 25, so that they can be manufactured at low cost.

FIG. 3 is a structural view showing a housing structure according to a third embodiment of the present invention. FIG. 3 (a) is a cross-sectional view of the housing, and FIG. 3 (b) is a cross-sectional view of the auxiliary container. is there. Reference numeral 30 denotes a casing molded by aluminum die casting or the like, which has a shape in which a main body 311 for accommodating electronic components and the like of an electronic device (not shown) and an auxiliary container 312 serving as a ventilation path for the outside air are connected. ing. An opening (left end in the figure) is provided in the main body 311, and the lid 12 molded of resin or the like is attached to the main body 311.
Is attached to this opening with an adhesive or the like so as to hermetically close the opening.

The auxiliary container 312 has a space of a predetermined capacity or more, and has an outside air hole 316 communicating with outside air on a side surface (lower end in the figure).
Is provided. Then, the main body 311 and the auxiliary container 3
12 are connected by a connecting portion 314, and the internal space thereof is also connected by a through hole 313 provided in the connecting portion 314. The auxiliary container 312 has an opening on the side opposite to the surface on which the through-hole 313 is formed. The opening is formed by aluminum die casting or the like via a gasket 13 so as to seal the auxiliary container 312. The cover 14 is screwed with a screw or the like.

Further, in the auxiliary container 312, a plurality of downwardly inclined inner walls 36 are provided so as to protrude from the side wall provided with the through holes 315, so that even if rainwater or the like is flooded in the auxiliary container 312, the through holes are formed. 313 and is formed so as to flow downward in the figure (in the direction of the outside air holes 316). In the housing 30 having the above configuration, water does not directly enter the inside of the main body 311 that houses and seals electronic components and the like. Further, even if the temperature fluctuates greatly (from high temperature to low temperature), since air enters through the outside air holes 316 and the through holes 313, the state in which the pressure inside the main body 311 is lower than the outside pressure does not continue. It does not occur that moisture is sucked from the fine holes such as the bonding surface of No. 12. Then, if the capacity of the auxiliary container 312 is sufficiently larger than the volume change of the air inside the container due to the temperature change, even if the outside air holes 316 are in the water, the water accumulates in the auxiliary container 312 and the water is sucked into the main body 311. It will not be. Further, since the auxiliary container 312 is provided with the inner wall 36, even if rainwater or the like is flooded in the auxiliary container 312, the water does not reach the through-hole 313, and along the inner wall 36 inclined downward. Then, it flows into the outside air holes 316 and is quickly discharged.

FIG. 4 is a sectional view showing a housing structure according to a fourth embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, a solid content 47 having a volume molded of resin or the like is inserted into a space other than a housing portion of the main body 111 such as an electronic component. In the housing 10 having the above-described configuration, the same effect as that of the embodiment shown in FIG. 1 is obtained.
Since the air capacity of No. 1 is small, the change (decrease) of the air capacity with respect to the temperature change is small. Accordingly, the size of the auxiliary container 112 can be reduced.

FIG. 5 is a sectional view showing a housing structure according to a fifth embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the main body 111 for accommodating electronic components and the like and the auxiliary container 112 serving as an air passage for the outside air are separately formed. It is connected rotatably by the connecting part which it has. The main body 111 is fixed to the vehicle body, and the center of gravity of the auxiliary container 112 is provided on the side of the outside air hole 116 with respect to the rotation axis (the auxiliary container 112 is so designed). The air hole 116 is rotated so as to always be on the lower side.

In the housing 10 having the above structure, since the outside air holes 116 are always on the lower side, water does not accumulate in the auxiliary container 112, and the auxiliary container 1
Water that has accumulated in the inside 12 is prevented from entering. FIG.
FIG. 6A is a configuration diagram illustrating a housing structure according to a sixth embodiment of the present invention. FIG. 6A is a cross-sectional view, and FIG. 6B is a perspective view of a bracket.

Reference numeral 611 denotes a main body of a housing for accommodating electronic parts and the like formed by aluminum die casting or the like. An opening (right end in the figure) is provided in the main body 611, and a lid 12 molded of resin or the like is attached to the opening with an adhesive or the like so as to seal the main body 611. A through hole 613 is provided near the upper end of the side wall of the main body 611 in the figure.

Reference numeral 617 denotes a bracket which is a bracket for fixing the main body 611 to the vehicle body, and an auxiliary container 612 serving as an air passage between the inside of the main body 611 and the outside air is integrally formed of an iron plate or the like. The auxiliary container part 612 of the bracket 617 has a space of a predetermined capacity or more, and a through hole 615 communicating with the through hole 613 of the main body part 611 on a side wall (right end in the figure).
Is provided. The bracket 617 is screwed through the gasket 63 with a screw or the like so as to be in close contact with the main body 611.

A lid 62 made of resin or the like is attached to the opening of the auxiliary container 612 with an adhesive or the like so as to seal the auxiliary container 612. Further, an external air hole 616 communicating with the external air is provided on the lower surface (the lower end in the figure) of the auxiliary container portion 612. The bracket 617 is provided with a mounting portion 618 for screwing and fixing to the object to be mounted.

In the housing structure having the above structure, since the auxiliary container for preventing water from infiltrating is formed by using the mounting bracket, there is an advantage that it can be realized at low cost.

[0023]

As described above, according to the housing structure of the present invention, a container having excellent waterproof properties can be realized with a relatively simple structure.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a housing structure according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a housing structure according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a housing structure according to a third embodiment of the present invention.

FIG. 4 is a sectional view showing a housing structure according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view showing a housing structure according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram showing a housing structure according to a sixth embodiment of the present invention.

[Explanation of symbols]

 10 ··· Housing 111 ··· Main body 112 ··· Auxiliary container 113 ··· Through hole 114 ··· Connecting part 116 ··· Open air hole 12 ··· Lid 13 ···· Gasket 14 ··· Lid

Claims (6)

[Claims] 1. A waterproof structure in a housing of an electronic device, comprising: a main body having a sealed internal space; a through-hole provided in the main body; and a through-hole connected to the outside. A waterproof structure comprising: an auxiliary container having an open space. 2. The waterproof structure according to claim 1, wherein a part of an outer wall of the auxiliary container is formed by an outer wall of the main body. 3. The waterproof structure according to claim 1, wherein an inner wall is provided inside the auxiliary container. 4. The waterproof structure according to claim 1, wherein a content for reducing the volume of the internal space is provided in the internal space of the main body. 5. The waterproof structure according to claim 1, wherein a rotation mechanism is provided for downwardly pointing an outside air hole of the auxiliary container that communicates with outside air. 6. The waterproof structure according to claim 1, wherein the auxiliary container is formed on a bracket for fixing the main body to an object.