Patent ID: 11970107
Assignee: HASCO VISION TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  F | IPC B  F

Claim 9:
10. The dimming mechanism according to claim 9, wherein an axial centerline of the cylindrical surface groove is perpendicular to a vertical plane passing a ball-head ball center of the fixed ball head connecting piece and the ball-head ball center of the second adjustable ball head connecting piece, wherein an inner surface of the cylindrical surface groove is formed by stretching, along the axial centerline, an intersection line of the ball head of the second adjustable ball head connecting piece and the vertical plane; or, the axial centerline of the cylindrical surface groove is formed as an arc line section, with the ball-head ball center of the fixed ball head connecting piece being as a circle center, and a connecting line between the ball-head ball center of the fixed ball head connecting piece and the ball-head ball center of the second adjustable ball head connecting piece being as a radius, wherein the inner surface of the cylindrical surface groove is formed by stretching, along the axial centerline, an intersection line of the ball head of the second adjustable ball head connecting piece and the vertical plane, and the vertical plane is the vertical plane passing the ball-head ball center of the fixed ball head connecting piece and the ball-head ball center of the second adjustable ball head connecting piece.