Filter holder insertable into the lens barrel of a camera
AssigneeNippon Kogaku K.K.
InventorSataya Watanabe
Life of this patent
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Abstract
The body of a filter holder carrying a filter has a slot in which an engaging member is disposed for rotation between first and second positions in response to rotation of a shaft to which the engaging member is attached. In a first position of the shaft, retaining means on the engaging member is retracted within the slot for effecting insertion of the holder into a lens barrel. In a second position of the shaft, the retaining means projects from and is engageable with the lens barrel for retaining the body thereto.
Claims9
In combination, a lens barrel of a camera and a filter holder, the filter holder comprising a body for carrying a filter, the body having a slot;
- the lens barrel having a guide member comprising a pair of walls spaced apart a distance to slideably receive said body;
- an engaging member disposed in the slot and mounted on the body for rotation between first and second positions;
- and retaining means on the engaging member having a retracted position when the engaging member is in its first position to enable insertion of the holder between said walls, and having an extended position projecting beyond the body when the engaging member is in its second position, at least one of said walls having an aperture to receive said retaining means when the engaging member is in its second position.
Dependencies are inferred from the claim text.