[Problems] The present embodiment is not used at the time to ensure the safety back automatically stored state, artificially pulled out the suspended personal effects from the storage position (night cover) made it possible engagement in use hook and, it will provide an open showcase with its hook. A hook, a hook body of a hook portion which is integrally connected to the one side portion of the spring winding portion and a spring wound portion having a side portion in a direction at least orthogonal, spring wound a spring portion which is wound around the one side portion of the part, a spring holding portion extending from one end of the spring portion and, extending from the other end of the spring part is fixed winding to the other side portion of the spring winding portion of the hook body a torsion spring is wound has a contact portion that, by rotatably held relative to the mounting portion of the hook body as well as restricting the movement of the spring holder, the spring holder and is elastically deformed, and through the spring section Te wound is allowed to act an elastic force to the contact portion is provided with a fixture that is brought into contact with the mounting portion of the hook main body.BACKGROUND.
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