JPH02220873A - Dot impact serial printer - Google Patents

Abstract

PURPOSE:To suitably replace a print head in response to the type of a printing ribbon by replaceably mounting a plurality of types of print heads having different magnetic flux densities of magnets in a carrier. CONSTITUTION:A print head 1 is in a cylindrical state, which is provided at its one end with a connector 8 to be detachably inserted to a predetermined position of a head carrier 10, and clamped to the carrier 10 by means such as clamping, etc. On the other hand, the carrier 10 is formed in a structure in which the head 1 is mounted at its center so that the head 1 can be freely replaceable. Since the head mounted in a printer is always driven at a predetermined voltage for a predetermined period of time, if a ribbon cassette containing a multistrike ribbon is used, the head 1 having relatively low magnetic flux density of its inner magnet and an impact force of the degree not damaging the multistrike ribbon is employed. On the contrary, when a printing of strong impact force is executed as in the case when a plurality of sheets are superposed and copy sheets such as carbon sheets are inserted therebetween to be printed, the head having relatively high magnetic flux density of its magnet is employed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer used as an output device of an information processing device, and particularly to a dot impact serial printer with a replaceable print head.

[Prior Art] Conventional dot impact serial printers generally print using cloth ink ribbons. In addition, in this case, a printer head with a strong impact force was used to make it possible to overlap multiple sheets of paper to print on, sandwich copy paper such as carbon paper, and print.

[Problem to be Solved by the Invention] However, in the conventional printer described above, when a multi-strike ribbon is used to obtain clearer printing, the impact force is strong and the ribbon is damaged. , there was a problem that printing was impossible.

On the other hand, if the impact force of the print head is weakened so that both this multi-strike ribbon and cloth ink ribbon can be used, the printing power will be reduced when printing on multiple sheets of copy paper as described above. There is an inconvenience that it becomes weak.

[Means for Solving the Problems] The present invention has been made in order to eliminate the drawbacks of the conventional dot impact serial printer as described above, and has the following configuration.

That is, in a dot impact serial printer in which a print head is mounted on a carrier section, a plurality of types of print heads having different magnetic flux densities of magnets are provided as the print heads, and the print heads are replaceably mounted on the carrier section. It is something.

[Example] Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a print head of a printer according to the present invention, and FIG. 2 is a perspective view of a print head carrier portion that allows the print head to be replaced.

The print head 1 has a cylindrical shape, and one end thereof is provided with a connector 8 that is detachably inserted into a predetermined position of the head carrier section 10. Fixed to IO. On the other hand, the carrier section IO has a structure in which the print head 1 is mounted in the center thereof, and the print head 1 can be freely replaced. However, the rest is the same as a conventional general printer, and an ink ribbon cassette 2 is attached around the printer head l, and the ink ribbon 9 near the tip of the print head l moves as the carrier IO runs. The paper is sequentially fed through a running gear 6, and is printed on the paper outside the card guide 3, which is erected in front of the tip 7 of the print head 1. The carrier portion IO is supported so as to grip the front guide shaft 4 and the rear guide shaft 5, runs on the guide shafts 4.5, and performs printing as described above.

In this case, the print head installed in this printer is
Since it is always driven at a constant voltage and time, when a ribbon cassette containing a multi-strike ribbon is used, the magnetic flux density of the magnet inside the print head is relatively low, and the impact force is Use a material that does not damage the multi-strike ribbon.

On the other hand, when printing with a strong impact force is required, such as when printing with multiple sheets of paper stacked together and copy paper such as carbon paper sandwiched between them, the print head should be moved to a position where the magnetic flux density of the magnet is relatively high. Exchange it for something more expensive.

[Effects of the Invention] As explained above, the present invention provides a dot/impact serial printer in which a print head is attached to a carrier portion, which includes a plurality of types of print heads having different magnetic flux densities of magnets as the print head, and Since the print head is replaceably mounted on the carrier section, there is an effect that the print head can be replaced as appropriate depending on the type of printing ribbon used. especially,
There is an advantage in that both multi-strike ribbons and fabric ribbons can be used without losing their effectiveness.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a print head of a printer according to the present invention, and FIG. 2 is a perspective view of a carrier section that allows the cut-off print head to be replaced. ■ = Printer head 2: Ink ribbon cassette 3: Card guide 4: Front guide shaft 5: Rear guide shaft 6: Ink ribbon drive gear 8: Connector 10: Carrier section

Claims (1)

[Claims] A dot impact serial printer in which a print head is mounted on a carrier section, wherein a plurality of types of print heads having different magnetic flux densities of magnets are provided as the print head, and the print head is replaceably mounted on the carrier section. Dot impact serial printer.