Patent ID: 7578487

Claim:
A music stand, comprising: a music paper receiving frame configured to support music paper rested thereon; and a suction cup device configured to support said music paper receiving frame, said suction cup device including a suction cup having a suction face and a rear face on the opposite sides along a thicknesswise direction thereof, a center shaft provided at the center of said rear face of said suction cup and extending in a direction away from said rear face along the thicknesswise direction, an attaching base having a skirt portion configured to cover said rear face of said suction cup and an outer tubular portion projecting from the center of said skirt portion and having said center shaft accommodated therein, and a displacement mechanism provided between said center shaft and said attaching base and configured to bias said center shaft and said attaching base in a direction in which, in a state wherein said suction face is attached to an attaching object face, an end of said skirt portion is pressed against said rear face of said suction cup or the end of said skirt portion is pressed against a portion of the attaching object face positioned on the outer side of said suction cup and displaces said center shaft in a direction in which said center shaft is spaced away from the attaching object face, said displacement mechanism including a lock lever coupled to an end portion of said center shaft against movement in an axial direction of said center shaft but for rotation in a circumferential direction of said center shaft between an initial position and a locked position, a coil spring disposed around said center shaft on the inner side of said outer tubular portion and anchored at one end thereof by said outer tubular portion and at the other end thereof by said lock lever in such a manner as to bias said lock lever toward the initial position and bias said outer tubular portion and said lock lever in a direction away from each other along said center shaft, and a cam mechanism provided between said outer tubular portion and said lock lever and configured to move, in response to the rotation of said lock lever from the initial position to the locked position, said suction cup from an initially attached state which is established by pressing, with said suction face opposed to the attaching object face, said center shaft against the attaching object face until said suction face is contacted over an overall area thereof with the attaching object face and the end portion of said skirt portion is contacted with an outer circumferential portion of said rear face or with a portion of the attaching object face on the outer side in a radial direction of said rear face to a finally attached state wherein said center shaft is displaced in a direction away from the attaching object face and then retain said lock lever at the locked position against the biasing force of said coil spring, wherein said music paper receiving frame and said outer tubular portion are connected to each other.