JPS5852839B2 - printer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer device of a type in which a printer head is driven to scan a recording surface, and more particularly to signal system electrical equipment of the printer head.

In a conventional printer of this type, a printing signal line is installed between a stationary part, that is, a printing signal supply circuit part, and a printer head so as to be extendable and retractable or movable back and forth.

Since the printer head is driven back and forth, for example, along the short side of the recording paper, these signal lines are repeatedly subjected to tensile and compressive forces and are prematurely damaged.

The present invention has been made with the object of improving the conventional problems such as breakage of printing signal lines and crosstalk.

FIG. 1 shows the main part of one embodiment of the present invention.

In FIG. 1, 1 is a printer head, 2 is a light receiving device attached to the printer head, 3□, 32 is a fixed frame, 4 is a light emitter fixed to the frame 31, 5□, 5
□ is a conductor guide bar, 6 is a reciprocating drive wire, and 7. ~
76 is an insulator three 7, SL is a printing signal line, and PL is a power line.

The ends of guide bars 51 and 5° are fixed to the fixed frames 31 and 32, and a power line is connected to one end of the guide bars 51 and 52.

The printer head 1 is driven back and forth to the right and left by a wire 6.

The printer head 1 includes a printing means, a printing drive control circuit, a printing 1 drive power supply device, and two sets of brushes.One set of brushes is connected to a guide bar 5. In addition, the brushes of other strings come into sliding contact with the guide bar 52.

Print drive power is supplied to the print drive power supply device through these brushes.

As shown in FIG. 2a, the light projection device 4 includes light emitting diodes PD1 to PD5 used as light emitting elements, their energizing circuits, and optical systems such as lenses and slits.

A printing signal is applied to the light projection device 4 through a signal line SL from a printing signal generating section of the printer main body, and the light emission of the light emitting diodes PD, -PD is controlled by the printing signal.

The light receiving device 2 attached to the printer head 1 includes a second b.
As shown in the figure, it is equipped with an optical system such as a slit, a lens, and a filter, as well as phototransistors PT to PT5 used as light receiving elements and their energizing circuits.

This light receiving device 2 includes each phototransistor PT1 to PT.
The light reception signal No. 5 is applied to the printing drive control circuit of the printer head 1C.

Each of the light emitted from the light emitting diodes PD, ~PD5 of the light projecting device 4 is transmitted to the phototransistor PT1 ~ of the light receiving device 2.
Each of the light emitting diodes PD1 to PD and each phototransistor PT, to PD so that PD5 receives light separately.
5 are arranged facing each other.

As explained above, in the present invention, since the printing signal is converted into an optical signal and given to the printer head, the printing signal line that was conventionally required is omitted, and conventional problems such as its breakage and crosstalk are avoided. Eliminate.

In the above embodiments, a light-emitting diode is used as a light-emitting element and a phototransistor is used as a light-receiving element. Needless to say, U7 is great.

Furthermore, instead of using a brush, power may be transmitted to the printer head by other known remote power transmission methods.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2a is a circuit diagram showing an example configuration of the light projecting device 4 shown in FIG.
FIG. 1 is a circuit diagram showing an example of the configuration of the light receiving device 2 shown in FIG. Note that the same reference numerals in the figures indicate the same parts. 1: Printer head, 2: Light receiving device, 31, 3□: Frame, 4: Emitter, 51, 52 guide bar, 6: Wire, 7, ~ 76: Insulator sleeve, PL: Power cable, SL: Signal cable .

Claims (1)

[Claims] 1 A printer head is scanned and reciprocated along at least one axis with respect to the recording surface, and during this scanning and reciprocating drive, a printing signal is applied to the printer head to print characters, figures, and characters defined by the printing signal on the recording surface. In a printer device that displays images such as symbols and numbers, a light-receiving element is installed in the printer head and a light-emitting element is installed in a stationary part of the printer body, and the printing signal is converted into an optical signal by the light-emitting element, and this optical signal is transmitted to the A printer device characterized by having a configuration in which a light receiving element receives light and obtains a printing electric signal.