JPH08106121A - Waterproof structure - Google Patents

Abstract

PURPOSE: To provide a waterproof structure which assures the adhesion of an elastic member and is advantageous in the durability of this elastic member even without strictly managing the amt. of an adhesive for adhering the elastic member. CONSTITUTION: This waterproof structure is formed by mounting the elastic member 9 via the adhesive 19 into a groove formed in a first member 1 at the time of coupling the first member 1 and a second member 5 and serves to elastically deform the elastic member 9 by bringing the member into contact with the second member 5. The bottom of the groove 3 is projectingly provided with a wall part 7 for segmenting the bottom of the groove 3 to two groove parts 3A, 3B in its transverse direction. The elastic member 9 is mounted via the one groove part 3A so that the elastic deformation of the elastic member 9 is effected mainly on the other groove part 3B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is a first invention which is connected to each other.
The present invention relates to a waterproof structure in which an elastic member is provided between the first member and the second member, and the elastic member serves to waterproof the first member and the second member.

[0002]

2. Description of the Related Art Conventionally, a waterproof structure for waterproofing a first member and a second member, which are openably and detachably connected, has been applied to, for example, a waterproof camera. In such a waterproof structure, the opening / closing portion of the outer shell structure that can be opened / closed, for example, between the back surface of the case body of the waterproof camera and the back lid that opens / closes the back opening of the case body, over the entire circumference of the back opening. A packing made of an elastic material such as rubber is provided so as to ensure the waterproof property between the case body and the back cover, and an example thereof is shown in FIGS. 5 to 8. FIG. 5 is a cross-sectional view of the packing, and FIG. 6 is a cross-sectional view of the packing part with the case back closed. The packing 31 is attached to the back cover 33 so as to extend over the entire circumference of the back opening of the case body 35, and the packing 3 facing the case body 35.
1 is provided with a convex portion 37, and a base portion opposite to the convex portion 37 has a concave portion 39, and the leg portions 4 on both sides of the concave portion 39.
1, 41 are provided. As shown in FIG. 6, the attachment of the packing 31 to the back cover 33 is performed by the leg 4
1, 41 are inserted into the groove 43 of the back cover 33, and the packing 3
This is performed by fixing the first leg portions 41, 41 in the groove 43 with the adhesive 45. Then, when the back cover 33 closes the back opening of the case body 35, the convex portion 37 of the packing 31 is crushed by the outer surface of the case body 35 from the shape shown by the two-dot chain line in FIG. 6 to the shape shown by the solid line. It is deformed, and the tip of the packing 31 comes into close contact with the case body 35.
Watertightness between the back cover 33 and the case body 35 is ensured.

When the back opening of the case main body 35 is closed in this manner, the convex portion 37 of the packing 31 is crushed, and the tip end surface of the convex portion 37 is deformed gently toward the base end side and is gently deformed. Also on the base end side, as shown by the solid line from the alternate long and two short dashes line in FIG. 6, the concave portion 39 is deformed so that the depth thereof decreases, and due to the deformation of the concave portion 39, the packing 31 accompanying the closing of the back lid 33 is formed. The internal compressive stress is dispersed, and when the case body 35 is released from the back cover 33, the packing 31 is restored to the initial shape shown by the chain double-dashed line in FIG.

[0004]

However, according to the conventional structure, the adhesive 45 for bonding the packing 31 into the groove 43 is provided.
If the amount is too large, as shown in FIG. 7, the adhesive 45 is filled in the recess 39 of the packing 31. In this state,
When the back cover 33 is closed, the protrusion 37 on the tip of the packing 31 is closed.
Is deformed, the recess 39 at the base end of the packing 31
As shown in FIG. 8, since the adhesive is filled with the adhesive 45, it cannot be deformed. Therefore, when the back cover 33 is closed, the amount of deformation of the packing 31 is smaller than that in the case of FIG. 6, and the compressive stress inside the packing 31 becomes non-uniform, so that the convex portion 37 of the packing 31 has a very large compressive stress. Therefore, it is disadvantageous in increasing the durability of the packing 31.

On the other hand, if the adhesive 45 to the groove 43 is too small, the recess 39 of the packing 31 will not be filled with the adhesive 45, but the adhesive 45 will be interrupted in the groove 43 and the packing will be lost. A gap is created between 31 and the recess 39, which causes a problem in waterproofing. As described above, when the packing 31 is mounted in the groove 43 of the back lid 33, it is necessary to manage the adhesive 45 with high accuracy so that the amount of the adhesive 45 is appropriate, and there is a problem that the production efficiency cannot be improved. .

The present invention has been devised in view of the above circumstances, and an object of the present invention is to increase the amount of an adhesive agent for adhering an elastic member to one of a first member and a second member that are connected to each other. An object of the present invention is to provide a waterproof structure in which an elastic member can be adhered to a recess without forming a gap even if it is not managed with precision, which is advantageous in increasing the durability of the elastic member and which can improve production efficiency.

[0007]

In order to achieve the above object, the waterproof structure according to the present invention has one of the first member and the second member when connecting the first member and the second member. Attach the elastic member via the adhesive in the groove formed in
In the waterproof structure in which the elastic member is brought into contact with the other of the first member or the second member and elastically deformed, a wall portion partitioning the bottom portion of the groove into two groove portions in the width direction is projected at the bottom portion of the groove. The elastic member is attached via one of the two groove portions, and the elastic deformation of the elastic member is performed mainly on the other groove portion of the two groove portions.

Further, according to the present invention, in the elastic member,
A leg part that can be inserted into one of the two groove parts is formed, and the leg part is attached in the one groove part with an adhesive. Further, according to the invention, the elastic member portion located on the other groove portion of the two groove portions has a first structure.
Is formed with a convex portion that is in contact with the other of the member or the second member. Further, the present invention is characterized in that a concave portion is formed at the elastic member portion facing the other groove portion of the two groove portions. The present invention also provides the above 2
A vent hole communicating with the outside of the groove is formed in the other groove of the one groove. Further, the present invention is characterized in that the first member is a camera body and the second member is a back cover that opens and closes a rear opening of the camera body.

[0009]

EXAMPLE An example in which the waterproof structure according to the present invention is applied to a case back which opens and closes a rear opening of a case body of a waterproof camera will be described below. First, the first embodiment will be described. FIG. 1 is a cross-sectional view of a back lid portion having a packing attached thereto, and FIG. 2 is a cross-sectional view of a packing portion with a back lid closed to a case body. As shown in FIG. 1, in the waterproof structure of the first embodiment, a packing attachment groove 3 is formed in a back cover 1 (corresponding to a first member), and this groove 3 is formed in the case body 5 (second (Corresponding to a member) is continuously formed so as to face the mating surface around the back opening. A wall portion 7 is provided on the bottom surface of the groove 3 so as to extend along the extending direction of the groove 3, and by this wall portion 7, the inside of the groove 3 has two groove portions 3A, 3B in the width direction.
The groove 3A is located on the rear opening side in the embodiment. The projecting height of the wall portion 7 is formed to be shorter than the depth of the groove 3, and in the embodiment, it is formed to be about ½ of the depth of the groove 3, and the projecting portion of the wall portion 7 is two groove portions 3A, 3B is set to have almost the same width. The groove 3
Of A and 3B, one groove 3A is used for mounting the packing 9, and the other groove 3B is used for overflow of the adhesive 19.

The packing 9 is made of an elastic material such as rubber and has a length corresponding to the extension length of the groove 3.
The packing 9 is provided with a leg portion 11 insertable into the groove portion 3A at a position corresponding to the groove portion 3A in the cross section thereof.
Further, an elastically deformable portion 13 is provided at a location corresponding to the groove 3B. Further, a convex portion 15 is provided at the tip of the elastically deformable portion 13, a concave portion 17 is provided at a portion of the elastically deformable portion 13 located below the convex portion 15, and the leg portion 11 is inserted into the groove portion 3A. In this state, both the convex portion 15 and the concave portion 17 are provided above the groove portion 3B. The packing 9 is attached to the back cover 1 by injecting an appropriate amount of the adhesive agent 19 into one groove 3A in advance and inserting the leg 11 of the packing 9 into the groove 3A from above to adhere the packing.

When the back cover 1 having the packing 9 adhered thereto closes the back opening of the case body 5, as shown by the solid line in FIG. 2, the elastically deformed portion of the packing 9 is mainly formed. 13 is deformed and comes into close contact with the case body 5, whereby the waterproof property between the case back 1 and the case body 5 is ensured. At this time, the convex portion 15 of the packing 9 is crushed and deformed so that the tip end surface of the convex portion 15 becomes lower toward the base end portion side, and the base end portion side of the elastically deformable portion 13 also has the shape shown in FIG. As indicated by the two-dot chain line to the solid line, the recess 17
The deformation of the recess 17 disperses the compressive stress inside the packing 9. Then, the elastic deformation of the convex portion 15 and the concave portion 17 is caused by the adhesive 1
Since it is performed on the groove portion 3B which is not filled with 9, the elastic deformation of the elastically deforming portion 13 is smoothly performed in the elastic region while the compressive stress is dispersed even if the opening / closing of the back cover 1 is repeated, and the durability of the packing 9 is improved. The nature is enhanced.

Further, when the packing 9 is attached, even if the amount of the adhesive 19 in the groove 3A is too large, as shown in FIG. Overflow into 3B. Then, if the overflow amount is equal to or less than the amount that fills the groove portion 3B, the elastic deformation of the elastic deformation portion 13 on the groove portion 3B is performed without any trouble. Therefore, the injection amount of the adhesive 19 into the groove portion 3A may be controlled so that the overflow amount is equal to or less than the amount that fills the groove portion 3B.
This control is facilitated by giving a large width to the injection amount. Therefore, even if the amount of the adhesive 19 is not controlled with high accuracy, the packing 9 can be reliably adhered to the recess 3 without producing a gap, and the production is improved. It is possible to improve efficiency.

Next, a second embodiment will be described with reference to FIG. FIG. 4 is a cross-sectional view of the packing portion with the case body having the back cover closed. In the second embodiment, the vent hole 21 communicating with the outside is provided on the outer wall of the overflow groove 3B away from the wall 7. Vent 21
The number is arbitrary, and a plurality of grooves may be provided at intervals in the extending direction of the groove portion 3B, or a single groove may be provided. In such a waterproof structure, when the elastically deformable portion 13 is deformed, the air in the groove 3B escapes from the ventilation hole 21 to the outside, so that the elastically deformable portion 13 is easily deformed, and
The compressive stress inside the packing 9 can be reduced, and the durability of the packing 9 can be further enhanced.

In the above embodiment, the case where the present invention is applied to the waterproof camera has been described, but the present invention can be applied to various devices and places other than the waterproof camera.

[0015]

As described above, in the waterproof structure according to the present invention, when connecting the first member and the second member,
Of the first member or the second member, the elastic member is attached in the groove formed in one of the first member and the second member via an adhesive, and the elastic member is brought into contact with the other of the first member and the second member to be elastically deformed. In the structure, a wall portion that divides the bottom portion of the groove into two groove portions in the width direction is provided so as to project from the bottom portion of the groove, and the elastic member is attached through one groove portion of the two groove portions. The elastic deformation of (1) is mainly performed on the other groove portion of the two groove portions. Therefore, even if the amount of the adhesive agent for adhering the elastic member is not controlled with high accuracy, the elastic member is surely adhered to the concave portion without forming a gap, and at the same time, between the first member and the second member. The waterproof property can be ensured, and it is advantageous in enhancing the durability of the elastic member, and the productivity can be enhanced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a back cover portion with a packing attached.

FIG. 2 is a cross-sectional view of a packing portion with the case back closed.

FIG. 3 is a cross-sectional view of a packing portion when there is too much adhesive.

FIG. 4 is a sectional view of a packing portion according to a second embodiment.

FIG. 5 is a sectional view of a conventional packing.

FIG. 6 is a cross-sectional view of a packing portion in which the case body has a back cover closed.

FIG. 7 is a cross-sectional view of a packing portion when there is too much adhesive.

FIG. 8 is a cross-sectional view of a packing portion when there is too much adhesive.

[Explanation of symbols]

 1 Back Cover 3 Groove 3A Groove 3B Groove 5 Case Main Body 7 Wall 9 Packing 11 Leg 15 Protruding 17 Recess 19 Adhesive 21 Vent

Claims (6)

[Claims] 1. When connecting a first member and a second member, an elastic member is attached via an adhesive in a groove formed in one of the first member and the second member, and the elasticity is set. In a waterproof structure in which a member is brought into contact with the other of the first member or the second member and elastically deformed, a wall portion that divides the bottom portion of the groove into two groove portions in the width direction is provided at the bottom portion of the groove. The waterproof structure is characterized in that the elastic member is attached via one of the two groove portions, and the elastic deformation of the elastic member is mainly performed on the other groove portion of the two groove portions. 2. The elastic member is formed with a leg portion that can be inserted into one groove portion of the two groove portions, and the leg portion is mounted in the one groove portion via an adhesive.
Waterproof structure described. 3. A convex portion which is in contact with the other of the first member and the second member is formed at the elastic member portion located on the other groove portion of the two groove portions. Waterproof structure described. 4. The waterproof structure according to claim 1, wherein a recess is formed in the elastic member portion facing the other groove of the two grooves. 5. The vent hole communicating with the outside of the groove is formed in the other groove of the two grooves.
Waterproof structure of 2, 3 or 4. 6. The waterproof structure according to claim 1, 2, 3, 4, or 5, wherein the first member is a camera body, and the second member is a back cover that opens and closes a rear opening of the camera body.