JPS59143673A - Printing ribbon sending mechanism for typewriter - Google Patents

Abstract

PURPOSE:To permit the vertical movement and pitch sending of a printing ribbon by a simple mechanism using one drive source, in which the pitch sending of the printing ribbon is made by cam lever, etc., by utilizing the vertical movement of a cassette base. CONSTITUTION:When a cassette base 3 is turned counterclockwise around a bearing pin 5 by the attraction of a solenoid 6 and a ribbon 1 goes up to become printing state, an arm 7 integrally formed with the cassette base 3 goes up, a cam lever 8 turns around a pin 9 while touching with a stopper 10 by the action of a spring 11, a cam formed at the tip of the cam lever 8 is engaged with a ratchet 13, the ratchet 13 is sent by one tooth, and the coaxial ribbon coiling drive shaft 14 is turned to take up the ribbon 1 by one letter. When the solenoid 6 is released, the cassette base 3 is lowered by the action of the spring 17, and printing state is visualized, the cam lever 8 is restored to its early-period state as the arm 7 goes down by the interaction of the stopper 10 and the spring 17, and the engagement of the cam and the ratchet 13 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printing ribbon feeding mechanism for a typewriter, and more particularly to a printing ribbon feeding mechanism in which vertical movement and pitch feeding of a printing ribbon are performed by a single drive source. Regarding.

[Technical background of the invention]

In typewriters, printing marks are used to make type printing easier to visually check. It is well known that the print regen is moved up and down, but the feeding mechanism for this print riser is either a conventional dedicated feed solenoid P or the operation of a print hammer.
Alternatively, methods such as applying carriage movement have been proposed.

Both of these methods of excitation require one each for the vertical movement of the riser and the horizontal rotational movement of the sensor feed.
This required multiple drive sources. In order to perform the two movements with only one motor, a rotation conversion mechanism,
It had the disadvantage of requiring complex mechanisms such as helical springs, cam pinions, and universal joins.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned facts, and an object of the present invention is to provide a print risen feeding mechanism for a typewriter that can perform vertical movement and pitch feeding of the printing risin with a simple mechanism using the same driving source. With the goal.

[Summary of the invention]

The present invention uses a typewriter's print regen feed mechanism to move the print regen up and down using a single drive source, and to increase the print speed by moving the print regen up and down using a single drive source. An arm is formed on a part of a cassette stand on which a printing ribbon cassette for storing a print ribbon is placed, a cam lever is rotatably supported on this arm via a rotating shaft, and this cam lever is rotatably supported on the cassette stand. A ribbon winding drive shaft is attached to the shaft of this mold wheel, and the vertical movement of the printing lean is printed. It is designed to be linked to the pitch feed of the engine.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a real-axis printing ribbon feeding mechanism for a typewriter according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of an actual IJ according to the present invention, in which a cassette 2 for storing a cassette 1 is mounted on a cassette stand 3. This cassette stand 3 is rotatably supported at one end by bearing pins 5 with bulges disposed on both sides of one end of a U-shaped carriage 4, and is fixed to one end of this carriage 4. By the operation of a provided solenoid 6), it moves up and down using the bearing pin 5 as a fulcrum. An L-shaped arm 7 is integrally formed in the middle portion of one side of the cassette table 30, and a cam lenght 8 is rotatably supported at the end of the arm 7 via a pin 9. This cam lens 78 is attached to a stopper fixed to the end of the carriage 4.
It is urged by a spring 11 so as to come into contact with O. This spring 11 has one end connected to the cassette stand 3.
The other end is fixed to one end of the cam lever 8. The end of the cam lever 8 opposite to the end that contacts the stopper 10 is curved upward, and a cam portion 12 is attached to the tip.
is formed. This cam portion 12 is connected to the cassette stand 3.
It is designed to mesh with a mold wheel 13 rotatably supported by the mold wheel 13. The shaft of this mold wheel 13 projects above the cassette stand 3 to constitute a winding shaft 14, and the ribbon cassette 2 is mounted from above through a protrusion 15 formed on the winding shaft 14. Nori, 3? is inserted into a groove of a winding drive shaft (not shown), and the winding of the rezen 1 can be performed by rotation of the mold wheel J3. Further, a pawl 16 is provided on the lower surface of the cassette table 3 and is biased by a spring (not shown) so as to engage with the mold wheel 13, and has the function of preventing the mold wheel 13 from returning. . Further, a spring 17 for returning the cassette table 3 is disposed between the arm 7 and the carriage 4, and a spring 17 for returning the cassette table 3 is formed at the center of one side of the carriage 4. so that the lower surface of the arm 7 comes into contact with the lower surface of the arm 7. 19 is the evening platen.

The operation of the embodiment of the present invention configured as described in j- above will be described below. 5. FIG. 2 shows that the cartridge stand 3 rotates counterclockwise around the bearing pin 5 due to the suction of the solenoid r6, and the riser 1 is raised to the printing state. In this case, the arm 7 formed integrally with the cassette stand 3 rises, and the cam lever 8 rotates around the bin 9 while contacting the stone set 10 due to the biasing force of the spring 11. cam part 12
meshes with the pattern wheel 13 to feed the pattern wheel 13 by one tooth, rotates the ribbon winding drive shaft coaxial with the pattern wheel 13, and winds up the rezen 1 by one character.

FIG. 3 shows a state in which the solenoid 6 is released, the cassette stand 3 is lowered by the biasing force of the spring 17, and the printing status becomes visible. In this case, as the arm 7 descends, the cam lever 8 returns to its initial state due to the interaction between the lock 10 and the spring 11, and the cam portion 12 of the cam lever 8 and the mold wheel 13 are disengaged.

〔Effect of the invention〕

As described above, the present invention uses the vertical movement of the cassette base to feed the printing mercury in pitch in the typewriter's printing mercury feeding mechanism, so that the pitch feeding of the printing rinsing can be carried out by a Cam Reno 9 or the like. Mechanism for printing reparation? The effect of being able to perform vertical movement and pitch feeding of the engine is extremely large.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the two-way printing feed mechanism for a typewriter according to the present invention, FIG. 2 is a side view showing the state when the ribbon cassette is raised, and FIG. FIG. 3 is a side view showing a state when the engine cassette is lowered. 1...s4? In, 2... In cassette, 3...
Cassette stand, 6... Solenoid, 7... Arm, 8
...Cam Reno'', 13...model car. Agent Patent attorney Book 1) Takashi Figure 1 Figure 2 Figure 3 8

Claims (1)

[Claims] In the typewriter's printing rig feed mechanism, the vertical movement of the printing rig driven by a single driving source is controlled by a cassette stand to which a printing lissage cassette is mounted, which stores the printing ligin, and a cassette stand formed on this cassette stand. arm and
Through a cam lever rotatably supported by this arm, it is linked to the rotational movement of a mold wheel that meshes with this cam lever,
A printing lysine feeding mechanism for a typewriter, characterized in that pitch feeding of the printing letters IJ and d is performed via the shaft of the die wheel.