JPS61237669A - Printer - Google Patents

Abstract

PURPOSE:To enable high-speed printing and contrive a reduction of noise, by varying printing speed in accordance with the thickness of the paper to be printed. CONSTITUTION:For example, when a paper thickness adjusting lever is set to a position for 'one sheet of paper', a signal for setting a high-speed printing mode is inputted into a controlling circuit 1 through a reading sensor 2. A signal for designating the length of a driving pulse for high-speed printing and a printing pulse with a short period are supplied from the circuit 1 to a printing head driving circuit 2. The circuit 2 supplies a printing pulse with a short period to a printing head 3 to drive a printing pin at high speed, whereby noise is reduced. The circuit 1 provides a carriage motor driving circuit 4 with a carriage motor driving pulse signal with a short period. The circuit 4 supplies a carriage motor 5 with a driving signal for moving a carriage at high speed, thereby moving the carriage at high speed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to printers, especially when printing by pressing pins corresponding to dots constituting characters, etc. onto paper to be printed. The present invention relates to a printer configured to change printing speed depending on the thickness of paper.

[Conventional technology]

Impact-type dot printers represent characters, symbols, etc. using dots (for example, 24 x 24 dots), and press pins corresponding to the dots onto the paper to be printed in order, and then insert the dots into a ribbon inserted between the pins and the paper. Printing is performed by transferring the ink contained in the paper onto the paper. The F
Because printers use pins to print, it is necessary to adjust the distance between the pins and the platen depending on the thickness of the paper to be printed on.

However, conventionally, the pins have been designed to press against the paper with sufficient force to print on multiple sheets of paper at the same time.

For example, even when printing on a single sheet of paper, the pin was pressed against the paper with the same force as when printing on multiple sheets of paper.

In this case, the design was such that the pin was always pressed against the paper with enough force to print on multiple sheets of paper.

[Problem that the invention seeks to solve]

For this reason, in the past, when printing on a sheet of paper using an impact-type dot printer, the pins were pressed against the sheet of paper with too much force, resulting in loud noise. There was a problem.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention employs means for changing the printing speed according to the thickness of the paper to be printed when printing using an impact type dot printer. This makes it possible to perform high-speed printing and to reduce noise when the target paper is, for example, one sheet.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration diagram of one embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views showing the positional relationship between the print head and platen used in the configuration shown in FIG. 1, and FIG. 4 is a configuration diagram shown in FIG. 1. A side view of the filter paper thickness VL adjustment lever and reading sensor used in the above is shown.

In the figure, 1 is a control circuit, 2 is a print head drive circuit, and 3 is a control circuit.
．． 7 is a print head, 4 is a carriage motor drive circuit, 5 is a carriage motor, 6.11 is a reading sensor, 8 is a platen, 9, IOa, IOb are printing paper,
12 represents a paper thickness adjustment lever.

In FIG. 1, the control circuit 1 in the figure is a reading sensor 6.
This is for selecting the high-speed printing mode when, for example, a signal indicating that printing is to be performed on a sheet of paper (for example, a signal indicating that the illustrated contact is in a closed state) is input. On the other hand, it is for selecting the normal printing mode when a signal indicating that printing is to be performed on two or more sheets of paper (for example, a signal in which the illustrated contact is in an open state) is manually inputted from the reading sensor 6. The high-speed printing mode is automatically set as described below by setting a paper thickness adjustment lever provided on the printer to the "one sheet" position, for example.

Further, the normal printing mode is automatically set by moving a paper thickness adjustment lever provided on the printer to the position of, for example, ``Ni-no-Yi'' for two or more sheets of paper.

When the high-speed printing mode is set, the control circuit 1 supplies the print head drive circuit 2 with a signal specifying the l-live pulse length for high-speed printing and a short-cycle printing pulse. The print head drive circuit 2, which has received the signal specifying the drive pulse length and the print pulse, supplies short cycle print pulses to the print head 3 to drive the pins forming the print head 3 at high speed. .

As a result, when printing on a sheet of paper, the period of driving the pin becomes shorter, and the energy supplied to the bottle is substantially reduced, thereby reducing noise. Further, the control circuit 1 supplies a fast-cycle carriage motor drive pulse signal to the carriage motor drive circuit 4. The carriage motor drive circuit 4, which has received the supply of the spear motor drive pulse signal, supplies a drive signal for moving the carriage at high speed to the carriage motor 5, thereby moving the carriage at high speed. As described above, by setting the paper thickness adjustment lever to the position of "one sheet of paper," high-speed printing is automatically performed and noise can be reduced.

On the other hand, when the control circuit 1 is set to the normal printing mode,
The print head drive circuit 2 is supplied with a signal specifying a drive pulse length longer than the drive pulse length in the high-speed print mode and a print pulse with a normal cycle. The print head I drive circuit 2 receives the supply of the signal specifying the live pulse length and the print pulse, and the print head 3 is configured by supplying the print pulse of the normal cycle to the print head 3. drive the pin at normal speed. As a result, when printing on two or more sheets of paper, the frequency at which the pins are driven is the same as normal. Further, the control circuit 1 supplies a carriage motor drive pulse signal of a normal cycle to the carriage motor drive circuit 4. The carriage motor drive circuit 4 that receives the carriage motor drive pulse signal supplies the carriage motor 5 with the carriage motor drive pulse signal.
A drive signal is supplied to move the carriage at a normal speed to move the carriage at a normal speed.

As described above, by setting the paper thickness adjustment lever to the position of two or more sheets, normal printing is automatically controlled.

FIGS. 2 and 3 show how the distance between the pins constituting the print head 7 and the platen 8 is changed depending on the paper thickness.

Figure 2 shows the paper thickness adjustment lever attached to the printer, for example, a piece of paper (one sheet of printing paper 9 in the figure).
The relationship between the pins constituting the print head 7 and the platen 8 is shown when the print head 7 is centered at the position shown in FIG. Print head 7 in the diagram
The distance between the pins forming the platen 8 and the platen 8 is ′°G,″
It is.

Figure 3 shows how the ``paper thickness adjustment lever'' attached to the printer can be used, for example, when ``two or more sheets of paper'' (printing paper 10a in the figure,
Print head 7 in the position of 10b)
The relationship between the pins constituting the platen 8 and the platen 8 is shown. In the figure, the distance between the pins that make up the print head 7 and the platen 8 is +
1c 2II.

As explained above, by setting the paper thickness adjustment lever to the "one sheet" or "two or more sheets" position, the distance between the pins that make up the print head 7 and the platen 8 is automatically adjusted. Moreover, as explained using FIG. The printer is notified of this and is set to high-speed mode, which allows printing to be performed at high speed and to reduce noise.

FIG. 4 shows a mechanism for switching the printing speed of the printer.

In the figure, the paper thickness adjustment lever 12 can be set at two positions, the illustrated position "B°" and the position "C°". position"
"B" is for when printing using one sheet of paper (in high-speed printing mode), and the paper thickness adjustment lever 1 is
2, the contacts of the microsinch that constitute the illustrated reading sensor 11 (the contacts of the reading sensor 6 in FIG. 1) are in a closed state (the part shown). On the other hand, position “′
C" is for printing using "two or more sheets of paper" (in normal printing mode), and the paper thickness adjustment lever 12 is used to control the contact of the microswitch that constitutes the reading sensor 11 (see Fig. 1). The contact point of the reading sensor 6 in the figure is in an open state (the part indicated by M).

〔Effect of the invention〕

As explained above, according to the present invention, the impact type I
When printing using a ζSoto printer, we use a method that changes the printing speed depending on the thickness of the paper you are printing on, so if you are printing on one sheet of paper, for example, It is possible to perform high-speed printing and reduce noise.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of one embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views showing the positional relationship of the printing/gutter and platen used in the configuration shown in FIG. 1, and FIG. 4 is the configuration shown in FIG. 1. A side view of a paper thickness adjustment lever and a reading sensor used in the illustrated configuration is shown. In the figure, 1 is a control circuit, 2 is a print head drive circuit, and 3 is a control circuit.
．． Reference numeral 7 represents a carriage motor drive circuit for the printing press 1-14, 5 represents a carriage motor, 6.11 represents a reading sensor, 8 represents a platen, 9.10a and 10b represent printing paper, and 12 represents a paper thickness ID adjusting lever. Patent Applicant Alps Electric Co., Ltd. Representative Patent Attorney Mori 1) Hiroshi (Yu (3 people) 2 Figure G1

Claims (1)

[Claims] In a printer configured to be able to adjust the distance between the print head and the platen in accordance with the paper thickness to be printed, detecting the paper thickness to be printed corresponding to the distance between the print head and the platen. It includes a reading sensor and a control circuit that controls the print head and carriage to be driven at different predetermined speeds based on the paper thickness detected by the reading sensor, and prints at high speed when the paper thickness is thinner than the predetermined thickness. A printer characterized in that it is controlled to