| 摘要 |
PURPOSE:To facilitate assembly and adjustment and enable a reduction in size, by a system wherein a hammer is turnably supported by a lever through a shaft, the first spring for energizing the hammer in a direction opposite to an impacting direction is fastened, and the lever is driven by the first and second cams against the second spring which energizes the lever in the impacting direction. CONSTITUTION:The hammer 1 which strikes a daisy wheel D is so supported that it can be turned with a shaft 2 as a center, a substantially L-shaped lever 3 is supported coaxially on the shaft 2, and a bent part 3b thereof is brought into contact with a side face of the hammer 1 by the second spring 4 fitted between an end part 1a of the hammer 1 and an end part 3a of the lever 3. On the other hand, a pin 3d provided at an arm part 3c of the lever 3 is brought into contact with a cam body 6 by the second spring 5, and the first cam 6a and the second cam 6b provided respectively at the outer peripheries of both end parts of an outer cylinder 6A drive the lever 3. With this construction, a small-type device easy to assemble and adjust can be provided. |
