JPS6045066B2 - printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device that is simple and compact by engaging a single electromagnetic mechanism with both a printing mechanism and a printing paper feeding mechanism.

This will be explained below with reference to the figures.

FIG. 1 is a diagram showing an embodiment of the present invention, in which reference numeral 12 denotes a holder for holding an intermediate hammer group 9 constituting a printing pier;
Reference numeral 15 indicates an electromagnetic mechanism for a paper feed trigger, such as a franchisor for a paper feed trigger, and 15 indicates a second motion transmission that rotates rubber rollers 15e and 15f at a fixed angle in response to the operation of the plunger 14 for a paper feed trigger to feed the printing paper. For example, the rotation of the gear 15C is caused by the axis 15d.
A spring clutch 16 is a first motion transmitting part for causing the intermediate hammer group 9 of the printing mechanism to perform a shift operation in response to the operation of the paper feed trigger plunger 14, for example, by the positioning lever of the holder 12. be.

When the power switch of the device is turned on, a motor (not shown) for rotating the type drum 2 begins to rotate, and its rotational force is transmitted to the gear 15c, which starts its idle rotation. Next, when the coil 14a of the paper feed trigger flansher 14 is energized and the armature 14b is moved, the claw 14
c is disengaged from the pawl 15b of the ratchet wheel 15a of the spring clutch 15, and the armature 14b immediately returns to its original position. As a result, the ratchet wheel 15a is moved so that the next pawl 15b is the armature 1.
4b until it engages with the claw 14c. Due to constant angle rotation of the ratchet wheel 15a, the rotation of the gear wheel 15c is caused by the rotation of the gear wheel 15c on the axis 15d.
``Rubber roll 15e'' fixed to the shaft 15d.
, 15f feed the paper 4.

Also, the armature 14b has a claw 14d, and when feeding the paper, pushes one end 16b of the positioning lever 16 to release the shaft 13.
Rotate the lever 16 counterclockwise around , and release the claw 16a of the lever 16 from the end surface 12b of the holder 12.

Then, the holder 12 is shifted in the direction of arrow A by the spring 8 to a position where the end surface 12c contacts the claw 16a, and the printing starts. The intermediate hammer group 9 is energized by the print signal, and even-numbered digits on the type drum 2 are printed.

Next, the holder shifting plunger 7 is energized and attracts the armature 7a engaged with the holder 12, thereby shifting the holder 12 in the direction of arrow B.

The positioning lever 16 is given clockwise torque around the shaft 13 by the spring 13a, so the holder 12 is
When shifted in the direction, the end portion 12b comes to the upper position of the claw 16a, the positioning lever 16 rotates clockwise, and then the holder 12 comes to rest with the end surface 12b holding down the claw 16a due to the tensile force of the spring. Thereafter, odd-numbered digits on the type drum 2 are printed in response to the print signal. When printing is completed, the coil 14a is energized and vapor feed is performed as described above, and the pawl 16 of the positioning/determining lever 16 is activated.
a is removed from the end surface 12b and the holder 1 is held by the spring 8.
2 is shifted in the A direction and returned to the initial state.

The main hammer group 3 has, for example, a solenoid 3c including an iron core and a coil in the head and supported by springs 3a and 3b, and a permanent magnet 10 attracts the iron core to accumulate mechanical force in the springs 3a and 3b.

In this state, when the solenoid 3c is energized via the springs 3a and 3b, the head is released and the intermediate hammer is struck, causing it to fly. The stain prevention member 6 is made of a thin metal or plastic plate (thickness 0.1 to 0.3 wr!n), and its flexibility allows it to be easily used during printing. As shown in FIG. 3, the force that bends the paper 4 is reduced by bringing it into contact with the type surface of the type drum 2.

This allows the driving force of the printing hammer 3 to be reduced.
In this embodiment, the holder shift plunger 7
It is also clear that the shift mechanism of the printing mechanism represented by spring 8 can perform the same operation by using the rotational force of the motor for rotating the type drum, a cam, a link mechanism, etc.

Alternatively, the anti-fouling member 6 may be fixed, and instead the type drum 2 may be shifted using the above-mentioned shift mechanism.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a top view thereof, and FIG. 3 is a diagram showing some details thereof. 1... Ink roller, 2... Type drum, 3...
Hammer, 4...paper, 6...dirt prevention member, 7...
- Plunger, 9... intermediate hammer, 14... plunger, 15... spring clutch.

Claims (1)

[Claims] 1. A printing mechanism that prints one line by shifting a hammer group or type drum in the width direction of the printing paper, a printing paper feeding mechanism that feeds the printing paper with a roller, and an electromagnetic mechanism equipped with an armature. , a first motion transmitting section for causing a hammer group or a type drum of the printing mechanism to perform a shifting operation in response to the operation of the armature of the electromagnetic mechanism;
a second motion transmitting section for rotating the roller of the printing paper feeding mechanism at a fixed angle in response to the operation of the armature of the electromagnetic mechanism to feed the printing paper. .