JP2010054540A - Light shielding mechanism for port - Google Patents

Abstract

【Task】
The present invention provides a port light shielding mechanism that can be expected to take a good image by preventing unnecessary light from being reflected in the camera lens and from the outside of the waterproof case equipped with the camera and from the outside of the long port. is there.
[Solution]
The present invention is a waterproof case in which a camera is detachably incorporated with a waterproof structure, and the port of the waterproof case into which the lens barrel of the camera is inserted, and the camera tube is inserted from the inner front end of the port by inserting the lens barrel. A port light-shielding mechanism comprising a light-shielding plate extending to the base of a lens barrel so that flash light from the camera or other light does not enter the lens of the camera.
[Selection] Figure 2

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light shielding mechanism for a port that prevents the light or other light from being reflected around a lens of a camera when the camera is flashed in a waterproof case that can incorporate a camera. 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 strobe light of the camera is normally emitted, but this light is diffusely reflected in the waterproof case, and the light passes between the lens barrel of the camera and the port of the waterproof case and turns to the camera lens side. Also, the port has a structure in which the camera barrel is inserted, and unnecessary light wraps around the lens portion of the camera from outside this portion, which adversely affects the photographing.

  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. Reference numeral 4 denotes an external shielding glass for the waterproof case.

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 it does not prevent unnecessary incoming light between the port and the lens barrel and from the outside of the long lens barrel.
Japanese Patent Laid-Open No. 7-063969

  The present invention provides a port light-shielding mechanism that can be expected to take a good image so that unnecessary light from inside a waterproof case and a long port mounted with a camera is not reflected on the camera lens.

  The present invention has been made in view of the above circumstances, and can prevent the light from the outside of the port or the flash light of the camera from entering the camera lens as unnecessary light, and in the axial direction of the lens barrel. A port light-shielding mechanism that does not interfere with the operation is provided.

  According to the present invention, an accordion-shaped light shielding plate is disposed from the inner side of the front end of the port to the base of the camera barrel, so that light from the outside of the barrel or unnecessary light from the camera flashing around the lens of the camera Can be expected and good shooting can be expected.

  Hereinafter, a port 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 camera barrel, and the barrel 11 is configured to be movable in the axial direction (indicated by an arrow). 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 disposed in the space between the port 31 and the lens barrel 11. In this case, one end of the light shielding plate 41 is fixed inside the tip of the port 31. The other end of the light shielding plate 41 is attached to a base 51 which is a part of the camera body of the lens barrel 11, and the light shielding plate 41 has a bellows structure.

  A fixed ring 61 is attached to the outer periphery of the base 51, and a fixed ring 71 is attached to the ring 61 with a screw or bayonet structure. As a result, camera flash light (including irregularly reflected light) or unnecessary light from the outer periphery of the port 31 does not enter from the front surface (lens side) of the lens barrel 11 of the camera as shown by the arrow in FIG.

  As a result, no reflection occurs. In this case, the light shielding plate 41 is selected to have a bellows shape and a material whose shape is elastic is restored. However, even if the elasticity is somewhat lacking, FIG. 3 shows an enlarged portion for fixing the light shielding plate 41 to the fixing ring 71 for resistance to the movement of the camera barrel 11 in the axial direction. The structure is not limited as long as the tip can be securely fixed to the fixing ring 71. In this case, the same applies to the portion attached to the port 31 of the light shielding plate 41. 81 is the glass of the port 31 and has a waterproof structure.

  In the present embodiment described above, the shielding mechanism of the light shielding plate 41 has a bellows structure, and is extended from the tip of the port 31 to the fixing ring 71 provided on the base 51 of the camera. There is no such thing as (irregular reflection light) passing through the inside to the lens side of the camera and being reflected. Therefore, good photographing can be realized.

  Since the light shielding mechanism of the port 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 light shielding mechanism of the port 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 51, Base 61, Ring 71, Fixing ring 81, Glass

Claims (2)

  A waterproof case in which the camera is detachably built in a waterproof structure, the port of the waterproof case into which the camera barrel is inserted, and the base of the camera barrel from the inner end of the port through which the lens barrel is inserted A light shielding mechanism for a port, characterized in that the flash light of the camera or other light does not enter the lens of the camera.   The port light shielding mechanism according to claim 1, wherein the light shielding plate is provided in a bellows shape.

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