JPS5812782A - Printer - Google Patents

Abstract

PURPOSE:To construct a simple feeding and shifting mechanism for a ribbon capable of operating securely and composed of a reduced number of component parts, by a method wherein taking-up of an ink ribbon and changing-over of ink color are simultaneously performed by a single flexible member. CONSTITUTION:By moving a carriage 1 along a straight line, a wire 8 fixed to a pin 7 is moved and pulleys 11, 12 are rotated to rotate a driving pin 17, whereby a ribbon feed roller 23 is rotated to feed the ribbon 22. A change-over lever 13 is rotated by a solenoid 18, the pulley 12 is moved in the direction of an arrow 20, a spring 6 is displaced and a shift drive lever 4 is rotated, whereby a ribbon-shifting lever 2 is rotated around a pivot 3 to cause the ribbon 19 to move up and down in the direction of an arrow 21.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer having a simple and reliable method for winding an ink ribbon and switching colors of the ribbon.

Conventional printers often use a member such as a wire belt as a ribbon winding mechanism, and have an independent drive source such as a motor or the like powered by the operation of a caretaker. In addition, a completely different power transmission system is required for ribbon color switching, etc., which makes the mechanism complicated and the number of parts increased.The present invention solves these drawbacks by using a single power transmission system. The flexible member is used to simultaneously transmit the winding of the ink ribbon and the switching of the ribbon color, and will be described in detail below.

1 and 2 show embodiments of the present invention, which will be explained according to the drawings.

Reference numeral 1 denotes a carre and a sore board, on which a print head or a diso wheel type printing mechanism is mounted. The carriage 1 is powered by a power source (not shown) and a guide shaft 9.
It is slidably supported by 10 and makes reciprocating linear motion in the horizontal direction. One end of the wire 8 is fixed to a pin 7 on the carrier sole 1 and engaged with a spring 6 via a pulley 11 and a pulley 12, and the other end of the spring is fixed to the pin 7.

The pulley 12 is integrated with a gear and is rotatably provided on the rotatable switching lever knob 3.

When the gear ledge 1 performs a linear motion by a power source (not shown), the wire 8 fixed to the pin 7 simultaneously moves and the pulley 1
1 and pulley 12 rotate.

The rotation of the pulley 12 is controlled by the switching gear 14 and the idle gear 15.
, and is transmitted to drive gear 16, and drive gear 1
The drive pin 17 provided on the integral shaft of 6 is rotated. As shown in FIG. 2, a ribbon feed roller 23 is engaged with the drive bin 17. feed roller 23
A pin pressure roller 24 presses the ribbon 22, and the ribbon feed roller 23 is rotated by the rotation of the drive pin 170, thereby feeding the ribbon. Also pulley 1
2, a solenoid 18 engaged with the other end of the switching lever rotates the switching lever 13 in proportion to the amount of operation of the solenoid, and the pulley 12 moves in the direction of arrow 20. As the pulley 20 moves, the entire length of the wire 8 is extended, so the spring 6 is displaced, and the relative distance between -/7 and the retaining part 5 of the shift dry pre--4 changes, causing the shift dry pre- -
4 rotates (3). The other end of the shift drive lever 4 is in contact with the ribbon shift lever 2 9. As the shift drive lever 4 rotates, the ribbon shift lever 2 rotates around the pivot 3 to move the ribbon 19 up and down in the direction of the arrow 21. move it. By this vertical movement, for example, in the case of a two-color ribbon of red and black, the color of characters to be printed can be changed.

In this way, by using one flexible member as the power transmission member for feeding the ribbon and the power transmission member for changing the color of the bottle, a simple and reliable printer can be obtained.

As explained above, in this embodiment, a wire rope is used as the flexible member, and the ribbon winding power is obtained from the reciprocating motion of the gear ledge via the wire rope, and the ribbon winding power is obtained from the drive source disposed outside the gear ledge. Shift power can be transmitted to the carriage.

That is, the present invention has the advantage that it is possible to reliably construct a simple ribbon feeding and ribbon shifting mechanism with a small number of parts.

In the above embodiment, a wire rope (4) was used as the flexible member, but as shown in FIG. .

Furthermore, it is also possible to apply the present invention to a printer in which a ribbon winding mechanism is mounted within the carriage, as long as it does not go against the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the invention, FIG. 2 is a partial sectional view thereof, and FIG. 3 is a perspective view of another embodiment of the invention. 1...Caresso, 2...Ribbon Shiftre/? -1
3... Pivot, 4... Shift drive lever, 5
...Engagement part, 6...Spring, 7...Bin, 8
...Wire rope, 9...Main shaft, 10.
・・Subshaft, 1・・Idle gear, 12・
... Pulley, 13... Switching lever, 14... Switching gear, 15... Idle gear, 16... Drive gear, 17... Drive bin, 18... Solenoid, 1
9...Ink Ribin, 22...Regan, 23...
Ribbon feed roller, 24... reddengressor roller, 25... belt.

Claims (1)

[Claims] The carriage is equipped with a flexible member that has one end fixed to the carriage and the other end via an elastic member, and a plurality of pulleys that tension the flexible member in the movement direction of the carriage. . A printer comprising: a drive mechanism for moving at least one pulley; and as the pulley moves, a ribbon shift mechanism that engages the flexible member moves the ribbon up and down.