| 摘要 |
A canopy is provided to secure the sufficient strength and rotation angle of rotating frames by giving sufficient thickness to rotating frames, coupling a rotating frame to each connecting member to be movable upward and downward and minimzing the friction caused by the movement of rotating frames. A canopy includes many post frames formed by inserting a lower frame to the inside diameter of an upper frame with a height adjustment member to be regulated in height, many bottom fixtures installed on the lower part of the lower frame, many fixed type 2-point connecting members(4) fixed to the inside diameter of each upper frame by a fixing projection and provided with a support piece(41) to be inserted to a housing groove(72) of a rotating frame to secure a sufficient thickness of a rotating frame, thereby to heighten the strength, many movable type 2-point connecting members installed to the outside diameter of the upper frame to move upward and downward, many 3-point connecting members located between the post frames, upper and lower 4-point connecting members located to the center of each post frame and attached with a deflection prevention frame, and many rotating frames(7) connected to the upper and lower 4-point connecting members to move upward and downward, thereby to secure a sufficient rotation angle and fitted with a stiffening member(8) to minimize friction caused by the rotation, thereby to minimize deformation caused by the friction.
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