JPH0737341Y2 - Drip-proof structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a drip-proof structure, and particularly to a drip-proof structure that can be provided in a narrow space and is suitable for sealing under a low load.

(B) Prior Art Many conventional drip-proof structures shown in FIGS. 5 and 6 have been provided.

FIG. 5 is a cross-sectional view showing a main part of a drip-proof structure using an O-ring at a joining portion of two members, and FIG. 6 is a cross-sectional view showing a main part of a drip-proof structure using a hollow O-ring.

In the figure, 11 is a first member forming a box, 11a is a mating portion, 11b is a U groove provided over the entire circumference of the mating portion 11a for embedding an O ring, and 11c is a hollow O-ring 14. A U-groove provided over the entire circumference of the mating portion 11a for embedding, 12 is an O-ring made of a rubber material, 13 is a second member forming a lid of the box,
Reference numeral 13a is a mating portion, 13b is a protruding portion that compresses the O-ring 12 at a position facing the U groove 11b, 13c is a protruding portion that is positioned at a position facing the U groove 11c and compresses the hollow O-ring 14, and 14 is a rubber material. It is a hollow O-ring made of.

As shown in FIGS. 5 and 6, in the conventional drip-proof structure, when an O-ring 12 is used when the mating portion of the first member 11 and the second member 13 has a drip-proof action. The structure and operation of FIG. 5 will be described. The O-ring 1 is attached to the mating portion 11a of the first member 11.
A U groove 11b for burying 2 is provided and an O ring 12 is buried. On the other hand, secondly, by the protrusion 13b provided on the mating portion 13a of the member 13 so as to face the U groove of the first member 11,
When a predetermined load is applied by combining the members with the
Comes into contact with the O-ring 12 and compresses. This provided the sealing effect.

The structure and operation of the hollow O-ring 14 shown in FIG.
Firstly, a U-shaped groove 11c and a convex portion 13c, which are provided in the hollow O-ring 14, are provided in each of the mating portions 11a, 13a of the members 11, 13, and the hollow O-ring 14 is embedded in the U-shaped groove 11c. , The above O-ring 1
The sealing effect was obtained in the same way as when using 2.

(C) Problems to be solved by the invention However, in the above-mentioned conventional drip-proof structure, the one using the O-ring cannot obtain the sealing effect unless a large load is applied to compressively deform the O-ring. There was a problem that it was restricted during use.

In addition, in the case of using a hollow O-ring, a part that is not hollow is partially formed, so it is necessary to apply a strong load to some extent, which is not as great as an O-ring, and the diameter is larger than that of the O-ring. There was a problem of getting bigger.

The present invention has been made in view of the above points, and an object of the invention is to provide a drip-proof structure that eliminates the drawbacks of the conventional example, can be used in a narrow space, and has a low load and a sealing effect. It is in.

(D) Means for Solving the Problem The drip-proof structure according to the present invention is a drip-proof structure using an annular packing member such as an O-ring in the joining portion of the first and second members, and is an annular packing. A base portion having a substantially rectangular cross-section, and a fin-shaped seal portion inclined from the upper portion of the base portion toward the outer circumference of the annular packing and provided over the entire upper portion of the base portion; Of the base member of the annular packing member over the entire circumference of the mating portion of the member, and the entire circumference of the mating portion of the second member facing the square groove. The fin-shaped seal portion provided over the entire circumference of the above is configured to be bent to receive and prevent water droplets from entering.

(E) Action According to this invention, since the sealing portion projects from the upper portion of the base portion of the packing member embedded in the rectangular groove of the first member in the outer circumferential direction of the annular packing, the sealing portion projects.
When the above parts are combined, this seal part enters the shallow groove of the second member and the tip part is pushed, and the seal part bends while being compressed in the inclined direction. As a result, the mating portion of the first and second members is sealed.

(F) Embodiment An embodiment of the drip-proof structure according to the present invention will be described with reference to FIGS. 1 to 4.

The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is an exploded perspective view showing a state in which a packing member is removed in the drip-proof structure of the present invention, and FIGS. 2 (A) and 2 (B) are cross-sectional views of a main part of the structure, showing the first and second members. FIG. 3 is a diagram showing a state before and after combining, FIG. 3 is an exploded perspective view showing an example in which the same structure is applied to a box, and FIG. 4 is a sectional view when the same structure is applied to a box.

In the figure, reference numeral 1 is a housing of an electronic device, for example, a first member,
1a is a mating portion, 1b is a square groove provided on the entire circumference of the mating portion 1a for embedding a rectangular base portion of the packing member, 2 is an elastic member such as a rubber packing member, and 2a is a packing member 2
The base part has a rectangular cross section, and 2b is the base part 2a.
For example, a fin-shaped thin-walled seal portion integrally provided by inclining in the direction of entry of water droplets from the upper part of the device, 3 is a panel of an electronic device, for example, is a second member, 3a is a fitting part, and 3b is a packing member 2
When the seal portion 2b of the above is inserted, it is a groove provided so as to come into contact with the bottom portion with an appropriate load and bend in a direction in which it is compressed while being compressed. A square groove 6 to be embedded is a box lid.

As shown in FIGS. 1 and 2, in the drip-proof structure of the present invention, for example, in the case of drip-proofing a joint portion of a first member 1 which is a housing of an electronic device and a second member which is a panel, In the rectangular groove 1b provided in the mating portion 1a of the first member 1, the base portion 2a of the rubber-made elastic packing member 2 and the seal portion 2b are arranged in the mating portion 1a.
It is buried so that it faces the direction (up). Then, the second member 3 is attached to the first member 1 in which the packing member 2 is embedded.
And a predetermined load is applied, the mating part of the first member 1
The sealing portion 2b protruding from the 1a is the square groove 3b of the second member 3.
Then, the tip end thereof comes into contact with the bottom portion of the square groove 3b, and opens and bends in a direction inclined while being compressed. As a result, the mating part is completely sealed.

FIGS. 3 and 4 show an example in which the drip-proof structure of the present invention is applied to a box-lid mating portion.

Further, the shape of the housing and the lid may be polygonal or circular, and the structure in which the packing member is embedded in the lid has the same drip-proof effect as described above.

(G) Effect of the Invention According to the drip-proof structure according to the present invention, the sealing portion of the packing member is compressed under a low load and bends by opening in a tilted direction to obtain a complete drip-proof effect. There is.

Further, there is an effect that the size can be structurally reduced as compared with the hollow O-ring.

Moreover, it has excellent features such as a simple structure and easy implementation because it can be constructed at low cost.

[Brief description of drawings]

1 to 4 show an embodiment of a drip-proof structure according to the present invention, and FIG. 1 is an exploded perspective view showing the drip-proof structure of the present invention with a packing member removed, and FIG. 2 (A). , (B)
Fig. 3 is a cross-sectional view of a main part of the same structure showing a state before and after the first and second members are combined, and Fig. 3 is an exploded perspective view showing a state where the same structure is applied to a box. FIG. 4 is a sectional view showing a state in which the same structure is applied to a box. FIGS. 5 and 6 show an example of a conventional drip-proof structure, and FIG. 5 is a cross-sectional view showing a main part of the drip-proof structure using an O-ring at the joining portion of two members, and FIG. FIG. 4 is a cross-sectional view showing a main part of a drip-proof structure using a hollow O-ring. Explanation of main symbols 1: First member 1a: Matching part 1b: Square groove 2: Packing member 2a: Base part 2b: Seal part 3: Second member 3a: Matching part 3b: Groove 4: Box 4a: Matching Part 4b: Square groove 6: Box lid 11: First member 11a: Mating part 11b: U groove 11c: U groove 12: O-ring 13: Second member 13a: Mating part 13b: Projection part 13c: Convex part 14: Hollow O-ring

Claims (1)

[Scope of utility model registration request] 1. A drip-proof structure in which an annular packing member such as an O-ring is used at a mating portion of two first and second members, and a base portion in which the cross-sectional shape of the annular packing member is substantially rectangular, The fin-shaped seal portion, which is inclined from the upper portion of the base portion toward the outer periphery of the annular packing and is provided over the entire upper portion of the base portion, and the entire periphery of the mating portion of the first member, An angular groove provided so as to embed the base portion of the annular packing member, and a fin provided on the entire circumference of the mating portion of the second member facing the angular groove, over the entire upper circumference of the base portion. A drip-proof structure, characterized in that it is configured to prevent water droplets from entering with a groove provided so as to bend and receive a sheet-shaped seal portion.