| 摘要 |
PURPOSE:To enable a recording head to be securely set into and released from a recording position, by a construction wherein a fulcrum of a pressing member in setting a recoding head into a recording position and retracting the head from the recording position is provided at a position deviated from a dynamic balance point in relation to each pressure spring. CONSTITUTION:In the case of releasing the recording head 1 from the recording position, where a cam 6 is rotated, a member 3 is gradually depressed downward. Since a cooperating point A is deviated from the dynamic balance point O to the side of the pressure spring 4, the member 3 is first gradually depressed while being titled to the side of the spring 4, and after the tip of the member 3 is fastened to a stopper 7, the member 3 on the side of a pressure spring 5 is depressed downward, and the head 1 is released from the recoding position. When setting the head 1 into the recording position, the cam 6 is ruther rotated, thereby pushing the member 3 upward. The member 3 is first pushed on the side of the spring 4, and after the tip of the head 1 is fastened to a platen 2, the member 3 on the side of the spring 5 is pushed upward, whereby the head 1 is set into the recording position. |
