JPS62246770A - Dot impact serial printer - Google Patents

Abstract

PURPOSE:To prevent the breakage of the pin of a printing head and the damage of an ink ribbon, by detecting the hooking of the ink ribbon of the printing head by the switch arranged in an ink ribbon case. CONSTITUTION:If the hooking of an ink ribbon 2 by the pin of a printing head 13 at the head pin contact part 1a of an ink ribbon case 1, the ink ribbon 2 is pulled by a take-up roller 1b and a microswitch 3 is pushed by the ribbon 2 to be turned ON and the signal thereof is inputted to a control part 10. The control part 10 stops the operation of a space motor 12 and the printing head 13 through a driver part 11 when an ON-signal is inputted from the microswitch 3. By this method, the breakage of the pin of the printing head and the damage of the ink ribbon can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dot impact serial printer,
In particular, the present invention relates to a dot impact serial printer with a function to prevent print head pins from breaking.

[Prior Art] Conventionally, in this type of dot printer, when a print head pin gets caught on an ink ribbon during printing, the print head can be bent or the ink ribbon can be damaged.

[Problems to be solved] The conventional dot printer described above has a problem that
The disadvantage is that when the printhead bins are caught on the ink ribbon, the spacing and printing operations continue, resulting in head bin folding and damage to the ink ribbon.

[Means for Solving Problems] The dot impact serial printer of the present invention, which solves the above-mentioned conventional problems, is located in contact with the ink ribbon being wound up in the ink ribbon case, and the ink ribbon is caught. In some cases, a switch is provided that is operated by pulling the ink ribbon, and a control section is provided that stops the printing operation and spacing operation in response to a signal from the switch, so that the switch detects the ink ribbon being caught and prints. This structure is designed to prevent the head bottle from breaking and the ink ribbon from being damaged.

[Examples] Hereinafter, the present invention will be described in detail with reference to the drawings showing preferred embodiments.

FIG. 1 is a cross-sectional view showing the configuration of a detection switch for a ribbon hook installed inside an ink ribbon case of a dot impact serial printer according to an embodiment of the present invention, and FIG. 2 is a sectional view of a dot impact serial printer according to an embodiment of the present invention. FIG. In FIG. 1, l is an ink ribbon case, la is a head bin contacting part, tb is an ink ribbon take-up reroller, lc is an ink ribbon storage part, 2 is an ink ribbon, and 3 is a ribbon hook is a detection microswitch. The ink ribbon 2 is stored in a folded state in the storage part 1c of the ink ribbon case 1, and is wound up by the ink ribbon take-up roller 1b via the head bin contact part 1a.

A microswitch 3 is provided between the head bin contact portion 1a and the ink ribbon take-up roller lb, and the ink ribbon 2 is configured to pass through while contacting the microswitch 3. When the ink ribbon 2 is caught by a print head bin or the like at the head bin contact portion 1a, the ink ribbon 2 is pulled by the ink ribbon take-up roller 1b, and the microswitch 3 is pushed by the ink ribbon 2 and turned ON. Also,
One end 4 of the microswitch 3 is connected to either +5V or GND.

When turned on, a high level or low level signal is output to the output terminal 5 to the control section.

In FIG. 2, IO is a control unit, 11 is a driver part, 12 is a spacing motor, and 13 is a print head.
control and execute printing operations. When the ink ribbon 2 is hooked and the microswitch 3 is turned on, an output signal from its output end 5 is input to the control section IO. When the output signal is input, the control section l
O commands the driver portion 11 to stop the operation of the spacing motor 12 and the operation of the print head 13.

As described above, in the printer of this embodiment, the microswitch 3 detects the hooking of the ink ribbon 2, and the control unit 10 stops the spacing operation and head operation. This makes it possible to prevent the print head bin from breaking and the ink ribbon 2 from being damaged.

[Effects of the Invention] As explained above, the present invention detects the ink ribbon hooking of the print head with a switch installed in the ink ribbon case, stops the spacing operation and head operation, and adjusts the pin of the print head. This has the effect of preventing bending and damage to the ink ribbon.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the structure of an ink ribbon case of a dot impact serial printer according to one embodiment of the present invention, and FIG. 2 is a control block diagram of the dot impact serial printer according to one embodiment. l: Ink ribbon case 1a: Head bin contact part 1b = Ink ribbon take-up roller 2: Ink ribbon 3: Micro switch lO: Control part II driver part 12 varnish basing motor 13 Ni print head

Claims (1)

[Claims] A switch is provided that is located in contact with the ink ribbon being wound up in the ink ribbon case and is operated by pulling the ink ribbon when the ink ribbon is caught, and the printing operation and the print operation are performed by signals from the switch. A dot impact serial printer, characterized in that the printer includes a control unit that stops the spacing operation, so that the switch detects the ink ribbon being caught and prevents print head pin breakage and damage to the ink ribbon. .