JP2009025611A5 - - Google Patents

Claims (6)

In the drive switching device that receives power from the drive source and transmits power to the driven part,
A drive input gear to which power is input from the drive source, a sun gear fixed to a shaft to which the drive input gear is fixed, a planetary gear meshing with the sun gear, and meshing with the planetary gear outside the planetary gear An internal gear, a support member that rotatably supports the planetary gear, an output unit that rotates integrally with the support member, and the sun gear, the internal gear, and the support that are centered on the shaft. A planetary gear mechanism in which the member is rotatably supported;
Means for restricting rotation of the internal gear;
A stop groove provided for each predetermined rotation angle in the output unit;
A stop member that stops the rotation of the output unit by engaging with the stop groove;
A control drive source for controlling the stop member;
A control member that stops the output portion at a predetermined rotation angle by the stop groove, the stop member, and the control drive source, transmits the rotation angle position, and controls the power transmission of the plurality of driven portions. The drive switching device, wherein the drive switching of the plurality of driven parts is controlled.   2. The drive switching according to claim 1, wherein the means for restricting the rotation of the internal gear is a torque limiter mechanism provided by an elastic member provided between the internal gear and the support member. apparatus.   The control transmission member corresponding to the stop groove and disposed in the drive transmission interrupting device of each driven part integrally moves and stops with the rotation of the output part, so that the drive transmission intermittent device of each driven part The drive switching device according to claim 1, wherein the power switching is performed.   4. The drive switching device according to claim 1, wherein the driven portion is supplied with a driving force from a single driving source and switches the driving force. 5. In an image forming apparatus that has a unit drive device that is driven and switched by a drive switching device and forms an image on a recording material,
Image forming apparatus, wherein the driving switching device is a driven switching device according to any one of claims 1 4.   The drive switching device performs drive switching with a single drive source with the multi-color toner transport mechanism of the image forming apparatus, the recording material transport mechanism, or the multi-color toner transport mechanism and the recording material transport mechanism as driven parts. The image forming apparatus according to claim 5.