JP2015055347A5 - - Google Patents

Claims (9)

Rotation restricted member that performs drive connection between the drive transmission member on the driving source side that is rotating and the driven body when rotation is restricted and rotation is stopped, and that cuts off the drive connection by rotating after rotation restriction is released And a rotation having a restricting protrusion for restricting rotation of the rotation restricting member in a contact state with the restricting protrusion provided on the rotation restricting member and releasing the rotation restriction of the rotation restricting member in a separated state. In a clutch mechanism comprising a regulating member and switching means for moving the rotation regulating member so as to be in any one of the contact state and the separated state,
The rotation restricting member includes a rotating member provided with the restricting protrusion and an elastic body that resists a force to rotate the rotating member, and the rotating member is moved in the contact state. A clutch mechanism characterized in that it is rotatably held around the rotation center of the rotation restricting member. The clutch mechanism according to claim 1,
The clutch mechanism, wherein the elastic body is a spring steel material that is elastically deformed in accordance with the rotation of the rotating member. The clutch mechanism according to claim 1 or 2,
The rotation restricting member has a holding portion that is rotatably held with the turning member sandwiched from both sides of the rotation restricting member in the rotation axis direction.
The holding portion is provided with guide portions facing each other that draw a locus on a concentric circumference of the rotation restricting member in the contact state,
A clutch mechanism, wherein boss portions provided on both sides of the rotation member in the rotation axis direction are fitted to the guide portion, and the rotation member rotates. The clutch mechanism according to claim 3,
In the contact state, the guide portion is provided with two pairs having different radii from the rotation center of the rotation restricting member,
A clutch mechanism, wherein a pair of two boss portions provided on the rotating member is fitted in each guide portion. In the clutch mechanism according to claim 4,
Of the two pairs of guide portions provided in the holding portion, the pivot range of the pivot member is restricted by contact of the boss portions fitted to the end portions of the pair of guide portions. Clutch mechanism. In the clutch mechanism according to any one of claims 1 to 4,
The clutch mechanism according to claim 1, wherein a rotation range of the rotating member is restricted by elastic deformation of the elastic body. The clutch mechanism according to any one of claims 3 to 6,
The rotation restricting member has a holding portion that is rotatably held with the turning member sandwiched from both sides of the rotation restricting member in the rotation axis direction.
The rotating mechanism has a linear protrusion on both side surfaces perpendicular to the rotation axis direction of the rotation restricting member, and a top part of the linear protrusion slides with the holding part. The clutch mechanism according to any one of claims 1 to 7,
A planetary gear mechanism having a sun gear, a planetary gear, a planet carrier that rotatably holds the planetary gear, and an internal gear;
An input gear in which the sun gear, the planet carrier, and the internal gear are alternatively driven and connected to the drive transmission member, an output gear that is driven and connected to the driven body, and the rotation restriction member A clutch mechanism configured to function as a fixed gear provided to operate integrally. In an image forming apparatus provided with a clutch mechanism for connecting and disconnecting rotational driving force of a driving source to a driven body,
An image forming apparatus comprising the clutch mechanism according to claim 1 as the clutch mechanism.