| 摘要 |
PROBLEM TO BE SOLVED: To provide a stay for keeping a first arm and a second arm in an unlocked state. SOLUTION: A basic end part of the second arm 2 is rotatably connected to a tip part of the first arm. A tip face of the first arm 1 has an engagement recessed part 46. The basic part of the second arm 2 is provided with a locking member 41 movable in the longitudinal direction of the second arm 2, and energized to a basic end side of the second arm 2 by a tension coil spring 45. The locking member 41 is provided with an engagement shaft 43 for unrotatably locking the first arm 1 and the second arm 2 by being fitted to the engagement recessed part 46 through a roller 44. A rotating member 52 is rotatably mounted on the locking member 41, and abutted on the roller 44 by a tension coil spring 53. A contact face 52a of the rotating member 52 is abutted on a circular arm face 48 formed on the tip part of the first arm 1. Whereby the locking member 41 is positioned at an unlock holding position in a state that the roller 44 is removed from the engagement recessed part 46. COPYRIGHT: (C)2004,JPO |
