Actuator, optical scanner, and image forming apparatus
First Claim
1. An actuator comprising:
- a movable member which rotates around a rotation axis;
a plurality of connecting members which extend from the movable member, the plurality of connecting members located near an outer circumference of the movable member at equal intervals in a plan view; and
a plurality of support units which respectively support the plurality of connecting members, whereineach of the plurality of connecting members hasa first connecting portion that is connected to the movable member;
a driving portion rotatably connected with one of the plurality of support units, the driving portion is located at a center of the one of the plurality of support units;
a second connecting portion that is connected to the driving portion and that is spaced apart from the movable member; and
a shaft that is connected between the first and second connecting portions, the shaft having a stress relieving portion to relieve stress acting on the shaft, the stress relieving portion being thinner than a remainder of the shaft,the first connecting portion and a group of the driving portion and the second connecting portion are located opposite to each other with respect to the movable member,the first connecting portion, a center of the movable member, the second connecting portion and the driving portion are located on a same linear line, andthe stress relieving portion relieves the stress acting on the shaft so as to prevent deformation of the shaft during rotation of the movable member.
1 Assignment
0 Petitions
Accused Products
Abstract
An actuator includes a movable member which rotates around a rotation axis, a plurality of connecting members which extend from the movable member through a shaft and are disposed in the vicinity of the outer circumference of the movable member at equal intervals in the plan view as viewed in a thickness direction of the movable member, and a support unit which supports each of the plurality of connecting members. Each of the plurality of connecting members has a driving portion rotatably connected with the support unit, and the shaft connecting the movable member and the driving portion. A first connecting portion that connects the movable member with the shaft and that is disposed opposite to a corresponding second connecting portion that connects the driving portion with the shaft through the movable member so that the movable member is interposed between the first connecting portion and the second connecting portion.
-
Citations
28 Claims
-
1. An actuator comprising:
-
a movable member which rotates around a rotation axis; a plurality of connecting members which extend from the movable member, the plurality of connecting members located near an outer circumference of the movable member at equal intervals in a plan view; and a plurality of support units which respectively support the plurality of connecting members, wherein each of the plurality of connecting members has a first connecting portion that is connected to the movable member; a driving portion rotatably connected with one of the plurality of support units, the driving portion is located at a center of the one of the plurality of support units; a second connecting portion that is connected to the driving portion and that is spaced apart from the movable member; and a shaft that is connected between the first and second connecting portions, the shaft having a stress relieving portion to relieve stress acting on the shaft, the stress relieving portion being thinner than a remainder of the shaft, the first connecting portion and a group of the driving portion and the second connecting portion are located opposite to each other with respect to the movable member, the first connecting portion, a center of the movable member, the second connecting portion and the driving portion are located on a same linear line, and the stress relieving portion relieves the stress acting on the shaft so as to prevent deformation of the shaft during rotation of the movable member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An optical scanner comprising:
-
a movable member which contains a light reflection portion having light reflectivity and rotates around a rotation axis; a plurality of connecting members which extend from the movable member, the plurality of connecting members located near an outer circumference of the movable member at equal intervals in a plan view; and a plurality of support units which respectively support the plurality of connecting members, wherein each of the plurality of connecting members has a first connecting portion that is connected to the movable member; a driving portion rotatably connected with one of the plurality of support units, the driving portion is located at a center of the one of the plurality of support units; a second connecting portion that is connected to the driving portion and that is spaced apart from the movable member; and a shaft that is connected between the first and second connecting portions, the shaft having a stress relieving portion to relieve stress acting on the shaft, the stress relieving portion being thinner than a remainder of the shaft, the first connecting portion and a group of the driving portion and the second connecting portion are located opposite to each other with respect to the movable member, the first connecting portion, a center of the movable member, the second connecting portion and the driving portion are located on a same linear line, and the stress relieving portion relieves the stress acting on the shaft so as to prevent deformation of the shaft during rotation of the movable member.
-
-
13. An image forming apparatus comprising:
-
a light emitting unit which emits light; and an optical scanner which reflects the light received from the light emitting unit to perform light scanning, wherein the optical scanner includes; a movable member which contains a light reflection portion having light reflectivity and rotates around a rotation axis; a plurality of connecting members which extend from the movable member, the plurality of connecting members located near an outer circumference of the movable member at equal intervals in a plan view; and a plurality of support units which respectively support the plurality of connecting members, wherein each of the plurality of connecting members has a first connecting portion that is connected to the movable member; a driving portion rotatably connected with one of the plurality of support units, the driving portion is located at a center of the one of the plurality of support units; a second connecting portion that is connected to the driving portion and that is spaced apart from the movable member; and a shaft that is connected between the first and second connecting portions, the shaft having a stress relieving portion to relieve stress acting on the shaft, the stress relieving portion being thinner than a remainder of the shaft, the first connecting portion and a group of the driving portion and the second connecting portion are located opposite to each other with respect to the movable member, the first connecting portion, a center of the movable member, the second connecting portion and the driving portion are located on a same linear line, and the stress relieving portion relieves the stress acting on the shaft so as to prevent deformation of the shaft during rotation of the movable member.
-
-
14. An actuator comprising:
-
a movable plate which has light reflectivity; a support unit which supports the movable plate at a position near an outer circumference of the movable plate; and a plurality of connecting members that connect the movable plate with the support unit and that are disposed near the outer circumference of the movable plate at equal intervals in a circumferential direction of the movable plate in a plan view of the movable plate, wherein each of the plurality of connecting members has a driving portion disposed away from the movable plate and rotatable with respect to the support unit, and an elongated shaft which connects the movable plate with the driving portion, the shaft having a stress relieving portion to relieve stress acting on the shaft, the stress relieving portion being thinner than a remainder of the shaft, a first end of the shaft is connected to the movable plate, and a second end of the shaft connected to the driving portion is located at a center of the support unit, the first end and the second end are located opposite to each other with respect to the movable plate, the first end, a center of the movable plate and the second end are located on a same linear line, and the stress relieving portion relieves the stress acting on the shaft so as to prevent deformation of the shaft during rotation of the movable member. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
27. An optical scanner comprising:
-
a movable plate which has light reflectivity; a support unit which supports the movable plate at a position near an outer circumference of the movable plate; and a plurality of connecting members that connects the movable plate with the support unit and that is disposed near the outer circumference of the movable plate at equal intervals in a circumferential direction of the movable plate in a plan view of the movable plate, wherein each of the plurality of connecting members has a driving portion disposed away from the movable plate and rotatable with respect to the support unit, and an elongated shaft which connects the movable plate with the driving portion, the shaft having a stress relieving portion to relieve stress acting on the shaft, the stress relieving portion being thinner than a remainder of the shaft, a first end of the shaft is connected to the movable plate, and a second end of the shaft connected to the driving portion is located at a center of the support unit, the first end and the second end are located opposite to each other with respect to the movable plate, the first end, a center of the movable plate and the second end are located on a same linear line, and the stress relieving portion relieves the stress acting on the shaft so as to prevent deformation of the shaft during rotation of the movable member.
-
-
28. An image forming apparatus comprising:
-
a light emitting unit which emits light; and an optical scanner which reflects the light received from the light emitting unit to perform light scanning, wherein the optical scanner includes; a movable plate which has light reflectivity and reflects the light received from the light emitting unit; a support unit which supports the movable plate at a position near an outer circumference of the movable plate, and a plurality of connecting members that connect the movable plate with the support unit and that are disposed near the outer circumference of the movable plate at equal intervals in a circumferential direction of the movable plate in a plan view of the movable plate, wherein each of the plurality of connecting members has a driving portion disposed away from the movable plate and rotatable with respect to the support unit, and an elongated shaft which connects the movable plate with the driving portion, the shaft having a stress relieving portion to relieve stress acting on the shaft, the stress relieving portion being thinner than a remainder of the shaft, and a first end of the shaft is connected to the movable plate, and a second end of the shaft connected to the driving portion is located at a center of the support unit, wherein the first end and the second end are located opposite to each other with respect to the movable plate, the first end, a center of the movable plate and the second end are located on a same linear line, and the stress relieving portion relieves the stress acting on the shaft so as to prevent deformation of the shaft during rotation of the movable member.
-
Specification