| 摘要 |
<p>A laser line-marking device (100) comprises a main body (1), a pendulum (4) hanging on the main body (1), a central lock (6) disposed on the lower portion of the main body (1). The central lock (6) comprises a locking linkage plate (62), a slider (65), a locking guiding plate (63), and a locking clamping plate (64). The locking linkage plate (62) and the locking guiding plate (63) are provided with central holes (61), and the pendulum (4) passes through the central holes (61). Two sliding columns (622) are disposed downwardly from the locking linkage plate (62). The slider (65) is provided with sliding grooves (652) for receiving the slidingcolumns (622). The locking guiding plate (63) is provided with two guiding grooves (633). There are two locking clamping plates (64), and both of them are provided with clamping columns (642), which are received within the guiding grooves (633).</p> |
