Unit retraction device and image forming apparatus including same

摘要

A unit retraction device has a hook member which engages with an engaged portion provided on a unit, and a retraction force generating mechanism which exerts a retraction force on the unit. The retraction force generating mechanism includes a first rotary member which is rotatably disposed on a first rotation pivot and to a rotating end part of which the hook member is coupled, a biasing member of which one end is hooked to the first rotary member and which biases the first rotary member in such a direction that the hook member retracts the unit into the apparatus body, and a second rotary member to which another end of the biasing member is hooked and which is rotatably disposed on a second rotation pivot. The second rotary member rotates in the same direction as the first rotary member as the latter is rotated by the biasing member.

主权项

1. A unit retraction device comprising:
a hook member which engages with an engaged portion provided on a unit that is inerrably or extractably loaded in an apparatus body; and a retraction force generating mechanism which exerts a retraction force on the unit when the hook member engages with the engaged portion in a retraction start position of the unit, wherein the retraction force generating mechanism includes
a first rotary member which is rotatably disposed on a first rotation pivot and to a rotating end part of which the hook member is rotatably coupled;a biasing member of which one end is hooked to the first rotary member and which biases the first rotary member in such a direction that the hook member retracts the unit into the apparatus body; anda second rotary member to which another end of the biasing member is hooked, the second rotary member being rotatably disposed on a second rotation pivot, the second rotary member rotating in a same direction as the first rotary member as the first rotary member rotates under a biasing force of the biasing member, and the unit retraction device retracts the unit into a retraction completion position inside the apparatus body.