Rod fixing device, and telescopic rod unit employing same

A rod fixing device suppressing a rod from unexpectedly moving, comprising:

• a first rod;
• a cylindrical second rod into which the first rod is inserted and which holds the first rod such that the first rod can be reciprocally moved in axial directions;
• and
• a locking mechanism which moves together with the first rod in the axial directions in the second rod, wherein
• the locking mechanism includes
• at least one stopper having a contacting surface portion capable of coming into contact with an inner circumferential surface of the second rod,
• a holder which is arranged in the second rod such that the holder can be moved together with the first rod and which rotatably holds the stopper in such a way that the contacting surface portion is capable of coming into contact with the inner circumferential surface of the second rod, and
• an elastic member which gives to the stopper an elastic force for generating a fixing frictional force between the first rod and the second rod by causing the contacting surface portion of the stopper to come into contact with the inner circumferential surface of the second rod,
• the stopper, when the first rod moves to one side in the axial directions, is rotated such that the contacting surface portion comes away from the inner circumferential surface of the second rod and, when the first rod moves to the other side in the axial directions, is moved against the fixing frictional force.