JPH04119251U - Waterproof structure of automotive exterior case - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the waterproofness of an automotive exterior case without using waterproofing materials. [Structure] A vehicle-mounted exterior case 4 is formed of a base 2 and a case body 3 shaped like a box lid into which the base 2 is fitted.
The fitting part 13 which is the outer part of the base 2 and is connected to the case body 3
A water release part 11 is provided on the lower side by recessing the outer part of the base 2 over the entire circumference. The water intrusion path through which water is transmitted by capillary action is interrupted by the water escape portion 11. Therefore, it is possible to prevent water from entering without using a special waterproofing member, and the waterproofness of the outer case 4 can be improved without reducing assembly workability or increasing costs.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is suitable for equipment mounting bases fixed to parts of cars etc. that are exposed to water. Waterproof structure for automotive exterior cases that is covered with a box-lid-like case to prevent water from entering. It is related to

0002

[Conventional technology]

Conventionally, the exterior case that is attached to parts of the car chassis that are exposed to water is shown in Figure 2. The structure shown in is often used. FIG. 2 is a cross-sectional view of a vehicle-mounted exterior case with a conventional waterproof structure. The same figure 1 is a mounting surface for an automobile chassis, etc., and 2 is a mounting surface for an automobile such as an acceleration sensor. A base on which equipment (not shown) is mounted, and this base 2 is fixed on the mounting surface 1. has been established. 3 is a case body for protecting the equipment attached to the base 2. The case body 3 is formed in the shape of a box lid into which the base 2 is fitted. It is crowned from the side. The base 2 and the case body 3 constitute an exterior case 4. It is. The mounting structure between the base 2 and the case body 3 is such that the outer surface of the base 2 is Attach the lower end surface of the case body 3 closely to the inner surface of the case body 3 over the entire surface. The structure was such that it was brought into contact with the face 1. In addition, in Figure 2, the base 2 and case book For ease of explanation, the fitting part with the case body 3 and the contact part between the case body 3 and the mounting surface 1 are provided. A large gap was intentionally left open for this purpose. In the exterior case 4 configured in this way, the base 2 and the case body 3 are in close contact with each other. This makes it difficult for water to enter. However, when the base 2 and the case body 3 are fitted together, Due to their structure, even if the mating part is formed with high precision, there will be a small gap between the two. It opens. For this reason, water splashed onto the mounting surface 1 is caused by capillary action to cause the water to leak into the case. Fine gaps between the lower end surface of the body 3 and the mounting surface 1, and between the base 2 and the case body 3 There was a problem in which the particles could penetrate inside the case.

0003 In order to solve this problem, conventionally, the gaps through which water can pass were filled with O-rings or rubber. Cover with packing material such as a sheet, or seal with adhesive or filler. was. Figures 3 and 4 show conventional exterior cases that employ this kind of waterproof structure. vinegar. Figure 3 shows a cross section of a conventional automotive exterior case that uses packing material made of rubber sheets. Figure 4 is a cross-sectional view of a conventional automotive exterior case with gaps sealed with adhesive. . In these figures, the same or equivalent parts as those explained in Fig. 2 above are shown. are given the same reference numerals and detailed explanations will be omitted. In these figures, 5 is a rubber seal. 6 is an adhesive. Case body shown in Figures 3 and 4 3 is such that its lower end surface (opening end) is in contact with the flange portion 2a of the base 2 from above. There is a packing material 5 between the lower end surface and the flange portion 2a. Alternatively, adhesive 6 is interposed. In addition, the packing material 5 and adhesive 6 are It is in close contact with the lower end surface of the body 3 over the entire circumference of the case body 3. With this structure, the inside of the outer case 4 is sealed, and the base 2 and the case body are sealed. It is possible to reliably prevent water from entering from the joint with 3.

0004

[Problem that the idea aims to solve]

However, as mentioned above, packing materials and sheets are used as a waterproofing measure for the outer case 4. If special waterproofing materials such as adhesive were used, the number of parts would increase and the cost would increase. That's what happens. Also, install or apply packing material or sealant in place. There was a problem that the assembly work was complicated and the workability during assembly was reduced. Furthermore, the exterior If Case 4 is completely sealed with the above-mentioned waterproof material, temperature changes will cause damage inside and outside the case. In areas where pressure differences occur and other parts penetrate inside and outside the case other than joints, such as halves. There is also the problem of water entering from the extraction part of the housing or the input/output shaft part.

[0005]

[Means to solve the problem]

The waterproof structure of the automotive exterior case according to the present invention is the outer part of the base and the case. The outer part of the base is recessed around the entire circumference below the fitting part with the main body to allow water to escape. It has a section.

[0006]

[Effect]

The water intrusion path, through which water is transmitted by capillary action, is interrupted by the water escape section.

[0007]

【Example】

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIG. FIG. 1 is a cross-sectional view of an in-vehicle exterior case that employs a waterproof structure according to the present invention. same In the figures, the same or equivalent members as those explained in FIGS. 2 to 4 above are shown. are given the same reference numerals and detailed explanations will be omitted. In Figure 1, 11 is a water release part. , this water escape part 11 is provided by forming a recess 12 on the outer side of the base 2. I'm being kicked. The recess 12 is formed continuously over the entire circumference of the base 2, and is In the example, at the lowest part of the base 2 below the fitting part 13 with the case body 3. It is arranged. In addition, the vertical dimension A of the recess 12 constituting the water escape part 11 is The relationship between the lower end surface of the case body 3 and the mounting surface 1 when the base body 3 is fitted to the base 2 The dimension is sufficiently larger than the interval B.

[0008] In the waterproof structure configured in this way, the case body 3 is fitted to the base 2 to cover it. When water is splashed on the case while the cap is on, the water will flow between the case body 3 and the mounting surface 1 due to capillary action. and enters the water escape section 11. However, the structure of this invention does not allow water to escape. As mentioned above, the height dimension A of the gap 11 is sufficiently larger than the gap B at the bottom of the case body 3. Due to the critical relationship, water can rise up to the fitting part 13 between the base 2 and the case body 3. I can't.

[0009] Therefore, according to the waterproof structure of the present invention, water infiltration where water is transmitted by capillary action is possible. Since the water inlet path will be interrupted by the water escape part 11, a special waterproof material is required. It can prevent water from entering the case when not in use.

0010

[Effect of the idea]

As explained above, the waterproof structure of the automotive exterior case according to the present invention is based on the exterior of the base. On the side, below the fitting part with the case body, all around the outside of the base. A water escape area is created by recessing the area, creating a water intrusion path where water is transmitted through capillary action. will be interrupted by the water escape section. Therefore, special waterproofing materials must be used. It is possible to prevent water from entering the case without using it, making assembly work easier. It is possible to improve the waterproofness of the outer case without reducing the waterproofness or increasing the cost. I can do that.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an in-vehicle exterior case that employs a waterproof structure according to the present invention.

FIG. 2 is a sectional view of a vehicle-mounted exterior case with a conventional waterproof structure.

FIG. 3 is a sectional view of a conventional vehicle-mounted exterior case using a packing material made of a rubber sheet.

FIG. 4 is a cross-sectional view of a conventional vehicle-mounted exterior case in which the gap is sealed with adhesive.

[Explanation of symbols]

1 Mounting surface 2 base 3 Case body 4 Exterior case 11 Water relief part 12 Recess

Claims (1)

[Scope of utility model registration request] 1. A waterproof structure for an automotive exterior case in which a box-lid-like case body that fits on the outer side of the base is covered from above on a base fixed on a mounting surface, wherein the outer side of the base A waterproof structure for an exterior case for a vehicle, characterized in that a water release part is provided by recessing the outer part of the base over the entire circumference below the part where it fits into the case body.