JPS63108741U - - Google Patents

Description

[Brief explanation of the drawings] Figures 1 to 7 show an embodiment embodying this invention. Figure 1 is a side cross-sectional view of the main part of the printing device, and Figure 2 is a weak impact force. FIG. 3 is a side sectional view of the hammer operating mechanism during operation, and FIG.
FIG. 4 is an exploded view of the clutch mechanism, FIG. 5 is a perspective view of the crank and armature, FIG. 6 is a time chart when a weak impact force is activated, and FIG. 7 is a time chart when a strong impact force is activated. 8 to 10 show conventional examples; FIG. 8 is a diagram equivalent to FIG. 1, FIG. 9 is a diagram equivalent to FIG. 3, and FIG. 10 is a diagram equivalent to FIG. 2. In the figure, 2 is a platen, 3 is a type element, 6 is a printing hammer, 8 is a hammer drive cam, 11 is a hammer drive motor, 13 is a locking rotating body, 13a is an outer peripheral surface, 1
5 is a locking projection, 16 is an inclined guide surface, 17 is a crank as an operating member, 24 is a tension spring, 25 is a solenoid, and 26 is an armature.

Claims (1)

[Claims for Utility Model Registration] A printing hammer 6 that is reciprocated between a printing position where it strikes a type element 3 selectively arranged opposite to the platen 2 and a retracted position where it is separated from the platen 2; and a hammer drive motor. 11, a hammer drive cam 8 that is rotationally driven by the hammer drive motor 11, and is urged to move in the direction of engagement with the hammer drive cam 8 by a spring 24, and as the hammer drive cam 8 rotates. It includes an operating member 17 that moves the printing hammer 6 from the retracted position to the printing position by the biasing force of the spring 24, and a locking rotary body 13, and controls the power of the hammer drive motor 11 according to the rotational restraint state of the locking rotary body 13. a clutch mechanism that transmits or interrupts transmission to the hammer drive cam 8; the hammer drive motor 11 and the hammer drive cam 8;
a first working position in which rotation of the locking rotary body 13 can be restrained in order to interrupt power transmission between the locking rotary body 13;
The power of the hammer drive motor 11 is transferred to the hammer drive cam 8.
a second operating position in which rotation of the locking rotor 13 is allowed and movement of the actuating member 17 is restricted to operate the printing hammer 6 with a weak impact force; an armature 26 which is arranged to be movable back and forth between a third operating position which allows the rotation of the actuating member 13 and operates with a strong impact force without restricting the movement of the actuating member 17; a solenoid 25 for sucking and moving the solenoid 25 toward the operating position of the printer; 26 as the third
a locking protrusion 15 that projects outward from the outer peripheral surface 13a and restricts rotation of the locking rotary body 13 itself based on engagement with the armature 26; and the outer peripheral surface 13a toward the locking projection 15 and guiding the movement of the armature 26 from the third working position to the position where it engages with the locking projection 15. Hammer actuation mechanism of printing device.