JP3411670B2 - Waterproof structure of drip-proof camera and open / close lid - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip-proof waterproof camera having an openable / closable lid and a waterproof structure for the openable / closeable lid. 2. Description of the Related Art When a back cover (opening / closing cover) is closed, a sealing member provided on the back cover resiliently contacts a sealing surface of a camera body. 2. Description of the Related Art A drip-proof and waterproof camera which is closed in a watertight manner is known. [0003] In this type of camera, if the seal member is configured to strongly contact the seal surface when the back cover is closed, the waterproof function between the seal member and the seal surface is improved. The back cover or the body is deformed by the strong elastic restoring force of the member, and if the strength of the camera body and the back cover is increased by increasing the thickness of the camera body and the back cover in order to prevent the deformation, the size of the camera is increased. For this reason, conventionally, in this type of camera,
In order to reduce the elastic contact force of the seal member with respect to the seal surface when the back cover is closed, various measures have been taken such as making the seal surface and the seal member a special shape. For example, there has been known one in which a sealing surface is provided to be inclined in order to reduce the elastic contact force. [0005] However, in the conventional camera provided with the sealing surface inclined, when the back cover is opened, there is a possibility that water droplets adhering to the sealing surface may penetrate into the camera body through the sealing surface. was there. SUMMARY OF THE INVENTION It is an object of the present invention to reduce the elastic contact force of a sealing member with respect to a sealing surface and to prevent water droplets adhering to the sealing surface from penetrating into a watertight area when an opening / closing lid is opened. An object of the present invention is to provide a drip-proof waterproof camera and a waterproof structure of an opening / closing lid that can be prevented. The waterproof structure of the drip-proof waterproof camera and the opening / closing lid according to the present invention includes a hermetically sealed opening formed in the camera body;
The camera above the closed opening outer periphery to form an annular sealing surface of the body and; that having a annular sealing member elastically contacts the annular sealing surface, freely opened and closed with respect to the camera body
Do open lid and; provided with said annular sealing surface, when closing the object closed opening by the closing cover, to elastically deform outward from the center side of the sealed opening the annular seal member in elastic contact is formed as a tapered surface, the
A free end portion of the annular sealing member elastically contacting the annular sealing surface
Is thinner than the fixed end attached to the open / close lid
It is characterized by being. The present invention will be described below with reference to the illustrated embodiments. FIG. 7 is a perspective view showing the external appearance of the drip-proof and waterproof camera 10 to which the present invention is applied with the back cover (opening / closing cover) 17 opened, as viewed from the rear side. The camera 10 has a body 11 formed in a water-tight manner, and a back cover 17 provided to be able to open and close the body 11. The body 11 has a rectangular sealed opening 31 on the rear surface. A spool room 12 and a patrone room 13 are provided on the left and right sides of the closed opening 31, and a photographing opening 15 surrounded by an aperture frame 14 is located between the spool room 12 and the patrone room 13. . On one side of the rear part of the body 11, a back cover 17 having a pressure plate 16 is provided so as to be openable and closable. A transparent window 18 is fitted to the back cover 17 in a watertight manner. The transparent window 18 holds the closed opening 3 with the back lid 17 closed.
A viewfinder eyepiece 1 provided substantially at the center of the upper part of the eyepiece 1
9 are provided. The water-tight structure of the body 11 and the back cover 12 with the back cover 17 closed is achieved by forming an annular seal member 20 made of a rubber material or a synthetic resin material having a high elasticity on the inner peripheral edge of the back cover 12. And the annular seal member 20 is attached to the body 11.
Is formed by elastically contacting an annular seal surface 30 formed around the closed opening 31 and having a closed curve. The drip-proof waterproof camera 10 to which the present invention is applied is characterized by a waterproof structure formed by an annular seal member 20 and an annular seal surface 30. Hereinafter, this characteristic portion will be described in detail. FIGS. 1 and 2 are cross-sectional views showing a main part of a first embodiment of the present invention. In these FIGS. 1 and 2,
The rear of the camera 10 is above the figure, and the front of the camera 10 is below the figure. Annular sealing surface 3 of body 11
Numeral 0 is formed as a tapered surface that increases in diameter from the center side of the hermetically closed opening 31 toward the outside as it goes in the closing direction of the back cover 17 (in front of the camera 10). On the other hand, an annular groove 23 is formed in the back cover 17 along the inner peripheral edge, and an annular seal member 20 is fitted into the annular groove 23 and fixed by an adhesive or the like. The annular seal member 20 has a cross-sectional shape that tapers toward the direction in which it escapes from the annular groove 23 (downward in the figure), and is elastic against the annular seal surface 30 when the back cover 17 is closed. The contacting tip is a projection 21. In the drip-proof and waterproof camera 10 of the present invention having the above-described structure, first, when the back cover 17 is closed (the state shown in FIG. 1), the annular sealing member 20 is attached to the annular sealing surface 3.
Since the body 11 and the back cover 17 are elastically contacted with each other, the space between the body 11 and the back cover 17 is watertight. At this time, since the protrusion 21 elastically contacts the annular seal surface 30 formed as a tapered surface,
The protruding portion 21 extends along the slope of the annular
1 Curve and deform outward (left side in the figure). The shape of the annular seal member 20 in an undeformed state is shown by a broken line in FIG. Therefore, when the back cover 17 is closed, the annular sealing surface 30 is formed as a surface perpendicular to the pressing direction of the annular sealing member 20, that is, perpendicular to the closing direction of the back cover 17. The elastic force of the annular seal member 20 on the annular seal surface 30 is reduced. Next, a case where the back cover 17 of the camera 10 is opened will be described. Normally, when opening the back cover of the camera, the back cover 17 is opened with the back cover facing upward, that is, with the front surface of the camera facing downward. Therefore, according to the camera 10 of the present invention, when the back cover 17 of the camera 10 is opened with the back cover 17 facing upward, water droplets W adhere to the annular seal surface 30 as shown in FIG. In this case, the water droplet W moves outwardly of the body 11 along the slope (tapered surface) of the annular seal surface 30 due to gravity (arrow D in FIG.
Flows in the direction). As described above, according to the drip-proof and waterproof camera 10 of the present invention, even when the water droplet W adheres to the annular seal surface 30 when the back cover 17 is opened with the back cover 17 facing upward. The water droplet W does not enter the inside of the body 11. FIGS. 3 and 4 are cross-sectional views showing main parts of a second embodiment of the present invention, and FIGS. 5 and 6 are cross-sectional views showing main parts of a third embodiment of the present invention. . These second and third embodiments are the same as the first embodiment except that the shape of the annular seal member 20 is different from the first embodiment. The annular seal member 20 in the second embodiment has a substantially L-shaped cross section, and has a base 24 fixed to the annular groove 23 and a projection projecting from the base 24 at a substantially right angle. 25. When the back cover 17 is closed, the projection 25 elastically contacts the annular seal surface 30. At this time, as shown in FIG.
Along the inclination of the body 11 toward the outside. Therefore, according to the second embodiment, the same effect as the drip-proof and waterproof camera 10 of the first embodiment can be obtained. The annular seal member 20 in the third embodiment has a first projection 26 and a second projection 27 which are in elastic contact with the annular sealing surface 30 of the back cover 17 when the back cover 17 is closed. A first projection 26 is formed on the outer peripheral side of the annular seal member 20, and a second projection 27 slightly shorter than the first projection 26 is formed on the inner peripheral side. These first and second projections 26, 27
Each have a cross-sectional shape that tapers off toward the direction of escape from the annular groove 23. When the back cover 17 is closed, the annular sealing surface 30 is closed.
, Both the first and second projections 26 and 27 elastically contact. At this time, as shown in FIG. 5, the first and second protrusions 26 and 27 are curvedly deformed toward the outside of the body 11 along the inclination of the annular seal surface 30, respectively. Therefore, according to the third embodiment, the same effect as that of the drip-proof and waterproof camera 10 of the first embodiment can be obtained. In the third embodiment, even if water drops enter the space between the first protrusion 26 and the annular sealing surface 30 in a state where the back cover 17 is closed, the body of the water drops is formed by the second protrusion 27. 1
The watertight structure of the camera 10 is improved because it can prevent intrusion into the inside of the camera 1. The shape of the annular seal member according to the present invention is not limited to the formation of the annular seal member 20 in each of the above embodiments, and the annular seal surface 30 when the back cover 17 is closed.
A configuration may be adopted in which an annular seal member having another shape is provided as long as the annular seal member is in elastic contact with the annular seal member. In the above embodiment, the drip-proof and waterproof camera 1
The waterproof structure between the body 11 and the back cover 17 has been described. However, the present invention is not limited to this, and is not limited to, for example, a battery compartment opening / closing cover provided in a drip-proof waterproof camera or a drip-proof waterproof camera. The present invention can be applied to an opening / closing lid provided in any other device having a drip-proof and waterproof structure. As described above, according to the drip-proof and waterproof camera of the present invention, when the annular sealing surface is closed by the opening / closing lid, the annular sealing member that is in elastic contact is closed. It formed as a tapered surface to elastically deform outward from the center side of the further annular sealing surface and bullet annular sealing member
Fixed end attached to the open / close lid with the free end in contact
Because it is configured to be thinner than
It can be easily deformed with respect to the annular sealing surface, and can prevent water droplets attached to the annular sealing surface from entering the watertight region when the opening / closing lid is opened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a main part of a first embodiment of a drip-proof waterproof camera to which the present invention is applied, with a back cover closed. FIG. 2 is a cross-sectional view showing a main part of the same figure with a back cover opened. FIG. 3 is a sectional view showing a main part of a second embodiment of a drip-proof waterproof camera to which the present invention is applied, with a back cover closed. FIG. 4 is a cross-sectional view showing a main part of the same figure with a back cover opened. FIG. 5 is a sectional view showing a main part of a third embodiment of a drip-proof waterproof camera to which the present invention is applied, with a back cover closed. FIG. 6 is a cross-sectional view showing a main part of the same figure with a back cover opened. FIG. 7 is a perspective view showing the drip-proof waterproof camera to which the present invention is applied, with the back cover opened, as viewed from the back side. [Description of Signs] 10 Drip-proof waterproof camera 11 Body 17 Back cover (open / close lid) 20 Ring seal member 21 Projection 23 Ring groove 30 Ring seal surface 31 Sealed opening

Claims (1)

(57) [Claims 1] An opening to be sealed formed in a camera body; an annular sealing surface formed around the outside of the opening to be sealed of the camera body; that having a annular sealing member in contact,
And openable opening closing with respect to the camera body; comprising a said annular sealing surface, when closing the object closed opening by the lid, the center side of the sealed opening the annular seal member in elastic contact Is formed as a tapered surface that is elastically deformed from the outside to the outside, and is free to elastically contact the annular sealing surface of the annular sealing member.
The end is narrower than the fixed end attached to the opening / closing lid
A waterproof structure for the drip-proof waterproof camera and the opening / closing lid, which is formed .