Base structure, processing device, and image forming device
AssigneeFuji Photo Film Co., Ltd.
InventorMasahiro Ohba
Life of this patent
Estimating the term…
Abstract
A platform for precisely moving a stage and holding the stage at a position to which the stage has been moved, using an eccentric cam. The platform uses plate springs to support the stage at which an exposure head is formed. An outer circumferential portion and a central axis portion of the eccentric cam rotate relative to one another, and the plate springs urge legs of the stage toward the outer circumference. As a stepping motor drives the eccentric cam to rotate, the legs are urged to abut the outer circumference. Due to the rotation of the eccentric cam, the stage is moved in the direction the plate springs and the rotating drum approach/separate from one another, and held at a position where the eccentric cam has stopped.
Claims20
A base structure, the base structure comprising:
- (A) two bases, one of which is operative to move linearly in relation to the other;
- (B) at least one elastic member in connection with said bases which positions said bases away from each other and maintains a space between said bases;
- (C) a cam element provided at one of said two bases and positioned in said space, said cam element driven to rotate;
- and
- (D) an abutting portion provided at the other of said two bases and on which said cam element abuts,
- (E) wherein said cam element includes:
- a central axis portion rotatable around a rotational axis as a center;
- a rolling element movably provided at said central axis portion;
- and
- a cylindrical outer ring rotatably provided with respect to said central axis portion through said rolling element,
- the rotational axes of said outer ring and said central axis portion being substantially parallel to one another and spaced apart from one another at a predetermined distance.
A processing device for applying a predetermined processing to an object, the processing device comprising:
- (I) a processing element for applying a predetermined processing to an object;
- and
- (II) a base device capable of changing a position of said processing element with respect to said object, the base device including:
- (a) a first base and a second base, one of said bases being operative to move linearly in relation to the other;
- (b) at least one elastic member in connection with said bases which positions said bases away from each other and maintains a space between said bases;
- (c) a cam element provided at said first base in said space and driven to rotate;
- and
- (d) an abutting portion provided at said second base and on which said cam element abuts, wherein said cam element includes:
- a central axis portion rotatable around a rotational axis as a center;
- a rolling element movably provided at said central axis portion;
- and
- a cylindrical outer ring rotatably provided with respect to said central axis portion through said rolling element,
- the rotational axes of said outer ring and said central axis portion being substantially parallel to one another and spaced apart from one another at a predetermined distance.
An image forming device for forming an image on a printing plate, the image forming device comprising:
- (I) a rotatably mounted drum having a periphery around which a printing plate can be releasably wound and fixed;
- (II) a mount for rotatably supporting said drum;
- (III) a recording head for recording an image on a printing plate;
- (IV) a base device for changing a position of said recording head with respect to said rotating drum, said base device including:
- (a) a first base and a second base, one of the bases being fixed at said mount side and the other being fixed at said recording head side- one of the bases being operative to move linearly in relation to the other;
- (b) at least one elastic member in connection with said bases which positions said bases away from each other and maintains a space between said bases;
- (c) a cam element provided at said first base in said space and driven to rotate;
- and
- (d) an abutting portion provided at said second base and on which said cam element abuts,
- (e) wherein said cam element includes:
- a central axis portion rotatable around a rotational axis as a center;
- a rolling element movably provided at said central axis portion;
- and
- a cylindrical outer ring rotatably provided with respect to said central axis portion through said rolling element,
- the rotational axes of said outer ring and said central axis portion being substantially parallel to one, another and spaced apart from one another at a predetermined distance.
Dependencies are inferred from the claim text.