| 摘要 |
Engaging grooves are provided in a stopper in addition to engaging grooves engaging with a key portion of an actuator, so that a receiver portion can be stopped on the way that the receiver portion is fully opened. Also, a twisting coil spring applies a twisting force to a sub-cam and the actuator, and urges a button in a direction where an engagement state between the key portions and the engaging grooves is released. As a result, when the button portion is pressed for a long time, the receiver portion is fully opened at once. Therefore, it is convenient that the receiver portion can be opened up to approximately 90° by pushing the button portion just once, and, at the same time, can be held at the position of approximately 90°. |
