JP2010054539A - Port with light shielding mechanism - Google Patents

Abstract

【Task】
The present invention provides a port with a light-shielding mechanism that can be expected to take a good image so that unnecessary light in a waterproof case equipped with a camera is not reflected on a camera lens.
[Solution]
The present invention is a waterproof case in which a camera is detachably incorporated with a waterproof structure, and a port of the waterproof case into which the lens barrel of the camera is inserted, and slightly inside an outer diameter of the lens barrel inside the port A donut-shaped light shielding plate having a small inner diameter hole is provided, and the lens barrel is inserted into the hole of the light shielding plate so that the flash light or other light of the camera does not enter the lens of the camera. A port with a light-shielding mechanism.
[Selection] Figure 2

Description

  The present invention relates to a port with a light-shielding mechanism that prevents the light or other light from flowing around a camera lens and being reflected when the camera is flashed in a waterproof case in which the camera can be incorporated. It is.

  In general, when a diving person shoots underwater, the camera is attached to a waterproof case, and shooting is performed by operating a shutter or the like from the outside. At this time, the camera's strobe usually emits light, but this light is diffusely reflected in the waterproof case, and the light passes between the camera barrel and the waterproof case port to the camera lens side for shooting. It has a bad effect.

  FIG. 1 shows this state, and flash light or irregularly reflected light (shown by →) in the gap between the lens barrel 1 and the port 3 attached to the mount 2 of the waterproof case into which the lens barrel 1 of the camera is inserted. Passes through and enters the lens of the front camera, which causes reflections. Therefore, countermeasures are necessary.

The literature follows a zooming operation of a lens barrel in a zoom camera, and effectively prevents harmful internal reflections in the lens barrel by moving the light shielding plate at a substantially constant interval with respect to the effective light beam. However, the mechanism is complicated and unnecessary light entering between the port and the lens barrel is not prevented.
Japanese Patent Laid-Open No. 7-063969

  The present invention provides a port with a light-shielding mechanism that can be expected to take a good image so that unnecessary light in a waterproof case equipped with a camera is not reflected on a camera lens.

  The present invention has been made in view of the above circumstances, and has a waterproof case port in which the camera is detachably incorporated with a waterproof structure, and an inner periphery through which the camera barrel passes is softer than the outer periphery. Since the donut-shaped light shielding plate is disposed and the lens tube is passed through the donut-shaped light shielding plate, unnecessary light wraps around the lens of the camera and no reflection occurs, so that it is possible to provide a port with a light shielding mechanism that has an effect of good photographing.

  In the present invention, the inner wall thickness is made thinner than the outer wall thickness to ensure flexibility, and a donut-shaped shading plate having a hole formed in this way is attached in the port, so that the axial direction of the lens barrel Smoothness can be ensured with respect to the movement of the camera, and in addition, it can be expected that light shielding is also reliable.

  Hereinafter, a port with a light shielding mechanism according to an embodiment of the present invention will be described in detail with reference to FIGS.

  Reference numeral 11 denotes a lens barrel of the camera, and the lens barrel 11 is configured to be movable in the axial direction. Such a camera (not shown) is mounted in a waterproof case suitable for this camera when a diver or the like is used underwater. A port 31 is attached to the mantle 21 of this waterproof case with a bayonet structure.

  A camera barrel 11 is inserted into the port 31. A light shielding plate 41 is arranged on the insertion side of the lens barrel 11 of the port 31 so that the camera flash light (including irregularly reflected light) indicated by the arrow → in FIG. To prevent reflections.

  As a result, no reflection occurs. In this case, as shown in the enlarged view of FIG. 3, the light shielding plate 41 is made of a resilient material in a donut shape, and is made thinner as it goes to a position where it comes into contact with the lens barrel 31, so that the lens barrel 11 strongly brakes. I try not to receive it. The clogging light shielding plate 41 has a thick outer periphery and is securely fitted to the inner wall of the port 31, and the inner periphery is thin and weak in elasticity and is weakly in contact with the outer periphery of the lens barrel 11, and emits flash light (including irregular reflection). It does not go around the lens side of the lens barrel 11 and prevents it from being reflected.

  In the above-described embodiment, since the shielding mechanism of the shielding plate 41 is configured, there is no possibility that flash light (diffuse reflection light) is reflected on the lens side of the camera and reflected. Therefore, good photographing can be realized.

  Since the port with the light shielding mechanism of the present invention is in soft contact with the lens barrel, it is effective without interfering with the operation of the lens barrel.

It is a block diagram explaining the relationship between a lens-barrel and a port. It is a schematic block diagram of the port with a light-shielding plate mechanism concerning the Example of this invention. FIG. 3 is an enlarged schematic diagram of a portion marked with a circle in FIG. 2.

Explanation of symbols

1, 11 Lens barrel 2, 21 Mount 3, 31 Port 4, 41 Shield plate

Claims (3)

  A waterproof case in which the camera is detachably incorporated with a waterproof structure, and a port of the waterproof case into which the lens barrel of the camera is inserted, and a hole having an inner diameter slightly smaller than the outer diameter of the lens barrel inside the port A donut-shaped light shielding plate provided with a lens is provided, and the lens barrel is inserted into a hole in the light shielding plate so that flash light or other light of the camera does not enter the lens of the camera. Port with shading mechanism.   The port with a light shielding mechanism according to claim 1, wherein a plurality of the light shielding plates are provided on the inner periphery of the port.   The port with a light-shielding mechanism according to claim 1, wherein the donut-shaped light-shielding plate has a thin inner wall which is a central hole side with respect to the outer circumference.

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