| 摘要 |
A hitting block assembly is provided to prevent a hitting block from being rotated while a plunger is vertically moves in a supporting cylindrical body. A hitting block assembly comprises a supporter(11), a drive unit(20), a hitting block(30), and a hitting sensor(40). The supporter has a receiving groove(11a) opened to the upside. The drive unit includes a solenoid main body, a plunger(22), and a coil. The solenoid main body has a penetration hole longitudinally formed in the center thereof and is vertically fixed to the supporter. The plunger is liftably coupled to the penetration hole. The coil is coiled on the circumferential part of the solenoid main body. The hitting block includes a housing(31) and a light emitting unit(32). The housing is made from a synthetic resin, has an observation window(31a) formed on a front side thereof, and is fixedly connected to the plunger. The hitting sensor senses that the hitting block is hit. The drive unit additionally includes a supporting cylindrical body in which a penetration hole is formed. The plunger is formed in a polygonal sectional rod shape. The penetration hole of the supporting cylindrical body has the same polygonal sectional shape as the plunger. The plunger is vertically movably inserted into the penetration hole of the supporting cylindrical body in a way that the plunger is not rotated.
|
