| 摘要 |
A length adjusting device for a lamp support (3), comprising a compression spring (1) and a threaded tube (2) located in a ring of the compression spring (1); one end of the threaded tube (2) is connected and fixed to inner threads in one end of the lamp support (3); a tube body of the threaded tube (2) penetrates through a middle hole in a connecting part (5) of a lamp cover support (4); the lamp cover support (4) can move up and down; and the compression spring (1) is sleeved on the tube body of the threaded tube (2) and is located between the lamp cover support (4) and the lamp support (3), and the change of the distance between the lamp cover support (4) and the lamp support (3) caused by different lamp cover lengths can be adapted because of flexibility of the compression spring (1). The design is ingenious, the structure is simple, production and installation are convenient, and the length adjusting device is widely applied to a lamp support (3). |
