JPS6341170Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the printing mechanism of a serial printer.

Generally, in a serial printer having a type foil, the type foil is held by a carrier, and the carrier is intermittently driven to transport the type foil.

However, conventionally, a drive mechanism for selecting type, positioning the type foil, pressing the type foil, etc. is provided on the carrier, and therefore, a large driving force is required for intermittent driving of the carrier.

An object of the present invention is to provide a printing mechanism for a serial printer that eliminates the drawbacks of the prior art described above.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

FIG. 1 shows an embodiment of the present invention. A U-shaped carrier 1 is slidably inserted into two guides 2 and 3 arranged in parallel, and on both sides of the carrier 1 is a carrier wire stretched between pulleys (not shown). Both ends of 4 are fixed. Further, a motor 5 is disposed inside the carrier 1, and this motor 5 is swingably attached to a support shaft 6 fixed to the carrier 1. Said motor 5
A stopper 7 is fixed to the carrier 1, and is urged by a return spring 8 so that the stopper 7 comes into contact with the upper surface of the carrier 1. Fixed to the upper end of the output shaft 5a of the motor 5 is a type foil 10 having type characters on its outer periphery and a type positioning notch 9 on its lower surface. Further, a timing signal plate 11 having slits corresponding to the letters of the type foil 10 is fixed to the output shaft 5a of the motor 5, and a photocoupler 12 is fixed to the motor 5 with the timing signal plate 11 sandwiched therebetween. has been done. A print drive member 13 corresponding to the positioning gear 9 and spaced apart from the carrier 1 by a drive mechanism (not shown) drives a print drive member 13 along the moving direction of the carrier 1 to a frame body (not shown) outside the carrier 1. The printing drive member 13 is provided so as to be able to be driven in the direction of the positioning notch 9, and a positioning pawl 13a that engages with the positioning gear 9 is formed on the surface facing the type positioning notch 9.

Next, the operation of the printing mechanism having such a configuration will be explained. When the carriage wire 4 is moved intermittently or continuously in the direction of arrow A by a drive means (not shown), the carrier 1 is guided by the guides 2 and 3 and moves in the same direction. Simultaneously with the movement of the carrier 1, the motor 5 is driven intermittently or continuously to rotate the type wheel 10 in the direction of arrow B. Then, the drive mechanism that drives the print drive member 13 at the print timing operates, and the print drive member 13 moves toward the point indicated by the arrow C.
gear portion 13a of the printing drive member 13.
engages the positioning gear 9 to position the type foil 10 and press the type foil 10. As a result, the motor 5 rotates in the direction of arrow C around the support shaft 6, and the type on the type foil 10 is pressed against the platen (not shown), and printed on paper (not shown) placed in front of the platen. do. Print drive member 1
3 retreats, the motor 5 is rotated in the opposite direction by the urging force of the return spring 8, and the type foil 10 is separated from the platen.

In this way, the print drive member 13 is formed to extend in the transport direction of the carrier 1 and is provided outside the carrier 1, and by driving this print drive member 13, print selection, type foil positioning, and pressure printing are performed. These printing selections, type foil positioning,
A drive mechanism for pressure printing can be provided outside the carrier 1, the carrier 1 becomes lighter, the carrier 1 can be driven easily, and the whole requires less power.

As is clear from the above description, the present invention has a print drive member that extends along the carrier transport direction and is provided outside the carrier, and drives this print drive member to perform print selection, positioning and pressing of the type foil. Since printing is performed, drive mechanisms for printing selection, positioning of the type foil, and pressure printing can be provided outside the carrier, and the driving force of the carrier can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention. 1...Carrier, 5...Motor, 9...Type positioning notch, 10...Type foil, 13...
Printing drive member, 13a... positioning claw.

Claims (1)

[Scope of utility model registration request] A type foil that has a plurality of type characters arranged in the digit direction, a type positioning notch provided corresponding to each of these type characters, and moves the type to be printed to the printing position by rotating; It has a carrier that holds the foil and transports it back and forth in a straight line, and a plurality of positioning claws that are provided outside the carrier, are formed long along the transport direction of the carrier, and are arranged in correspondence with the girder positions. A serial printer comprising: a print drive member that positions the type by moving in a direction substantially perpendicular to the position of the type to engage a positioning pawl with a type positioning notch to position the type, and also moves the type toward the paper to print. printing mechanism.