JPH0634116Y2 - Printer - Google Patents

Description

[Detailed Description of the Invention] [Outline] In the printer of the present invention, the stopper provided in the printing unit is abutted against the flat platen, so that the gap between the print head and the flat platen is set to a predetermined value. Be positioned at.

[Industrial application field]

The present invention relates to a printer, and more particularly to a printer positioning structure improved so that a gap between a print head and a flat platen is set to a predetermined value.

Recently, as part of computer banking system,
Various transaction operating devices are used in financial institutions and the like.

In addition to cash receipts and payments, these devices also fill in passbooks and cut sheets, and printers are used for this purpose.

[Conventional technology]

FIG. 3 is a perspective view of a conventional printer to which the present invention is applied, and FIG. 4 is a side sectional view showing a schematic configuration of the printer of FIG.

This printer 1 has a main body 2 and a printing unit 3 on a common substrate 10 in order to improve assemblability, maintainability and compatibility.
It is constructed and attached to and separately.

As shown in the figure, the printing unit 3 includes a print head 4 which needs to set a predetermined gap distance with respect to the flat platen 12, a carrier mechanism 5 for carrying the print head 4, and a print head 4. An ink ribbon cassette 6 fitted into the print head 4 for supplying the ink ribbon 6a to the
A motor 7 for driving the carrier mechanism 5 and the like, and a cover 8 for covering them are included.

The printing unit 3 uses the ink ribbon cassette 6 for replacement,
An arrow AB centering on a fulcrum 9 on the substrate 10 with respect to the main body 2.
It is configured to open and close so that it can be opened and closed in any direction.

One of the main body portions 2 includes a transport portion 11 and a terminal portion of the transport portion 11.
And a flat platen 12 provided on 11a.

With the above configuration, the recording medium 13 such as a passbook is used as the insertion port of the transport unit 11.
When inserted from 11b, the internal roller 14 causes an arrow C
When it is loaded in the direction indicated by and reaches the position of the flat platen 12, the print head 4 performs predetermined printing.

The medium 13 on which the predetermined printing has been performed in this way is conveyed in the conveying section 11 in the direction indicated by the arrow D by the roller 14 rotating in the direction opposite to the conveying-in direction, and is ejected from the insertion port 11b.

In the printer 1 having such a configuration, it is necessary to set the gap distance between the flat platen 12 and the print head 4 to be 0.4 mm, for example, in order to obtain an optimum printing state. In order to set the position of such a relationship, the substrate 10
Both ends of the cover 8 are attached to the abutting portion 15 provided on the substrate 10 so that the positional relationship between the cover 8 and the both ends 8a of the cover 8 is at a predetermined interval.
It is done indirectly by hitting 8a.

[Problems to be solved by the invention]

With the above-described structure, in order to maintain the positional relationship between the flat platen 12 and the print head 4 in which a proper gap distance is set to a predetermined value in a reliable and stable state over a long period of time, the substrate 10 is used. Mechanical strength and dimensional accuracy must be high, and adjustments for positioning on the printing unit 3 side and the substrate 10 side are also necessary, which requires members and time for this, and is expensive. There was a problem that became.

[Means for solving problems]

FIG. 1 is a perspective view showing only an essential part of the printer of the present invention. The printer 16 of the present invention comprises a transport unit 11 for transporting a medium 13 to be printed and a flat platen 12 provided at the end of the transport unit.
A main body 2 having a print head, a print head 4 configured to set a predetermined gap distance with respect to the flat platen 12, and a carrier for moving the print head in the longitudinal direction of the flat platen while facing the flat platen 12. A printing unit 17 having a mechanism 5 and a substrate 10 to which the main body unit 2 and the printing unit 17 are attached
The printing unit 17 is provided between the closed position where the print head 4 faces the flat platen 12 and prints on the medium 13 with respect to the main body unit 2 and the open position where the print head 4 is separated from the flat platen 12. It is movably attached to the substrate 10, and the printing unit 17 further includes a stopper 18a that abuts a portion outside the printing region of the flat platen 12 when the printing unit 17 is moved to the closed position,
The gap 18 between the flat platen 12 and the print head 4 is set to a predetermined gap by the stopper 18a abutting against the flat platen 12 so that the printing portion 17 is positioned with respect to the flat platen 12. It is composed.

[Action]

Since the stopper 18a of the printing unit 17 is configured to directly abut against the portion outside the printing region of the flat platen 12, the print head 4 and the stopper 18a are previously provided only on the printing unit 17 side.
The flat platen 12 is used as the reference plane depending on the value set in the positional relationship of the print head 4 and the flat platen 12 is automatically set to the set high-precision predetermined value by the stopper 18a that abuts there. Be positioned at.

〔Example〕

Hereinafter, a printer of the present invention will be described in detail with reference to the drawings by embodiments. The same parts are denoted by the same reference numerals throughout the drawings.

FIG. 1 is a perspective view showing only a main part of an embodiment of the printer of the present invention. In the figure, 16 is a printer, 17 is a printing unit, 18 is a cover, and 18a is a stopper.

As shown in FIG. 1, the printer 16 of the present invention has a third
Similar to the printer 1 shown in FIGS. 4 and 5, the main body 2 and the printing unit 17
It is assembled and configured in the form separated into and
Mounted on 10.

The main body 2 includes a transport unit 11 that transports a recording medium 13 such as a passbook or a single-cut sheet, and a flat platen 12 provided at the end of the transport unit 11.

The printing unit 17 includes a print head 4 which needs to set a predetermined gap distance with respect to the flat platen 12, and an ink ribbon cassette 6 fitted to the print head 4 for supplying an ink ribbon to the print head 4. And a carrier mechanism 5 that faces the flat platen 12 and moves the print head 4 in the longitudinal direction thereof, and a cover 18 that covers them.

The printing unit 17 has a closed position where the print head 4 faces the flat platen 12 with respect to the main body 2 and prints on the medium 13 with the fulcrum 9 as the center on the substrate 10 and the flat platen 12 from the flat platen 12 as in the conventional case. The ink ribbon cassette 6 is attached to the substrate 10 so as to be movable between the separated open positions and is configured to be openable and closable in the direction of arrow AB so that the ink ribbon cassette 6 can be easily replaced in the open position. Has become.

In the present invention, the print head 4 and the flat platen 12 are further added.
Set the stoppers 18a on both sides of the cover 18 on the printing side to the platen 1 so that the facing gap with
It is configured so that it directly abuts on both ends that are outside the printing area of 2.

With the above configuration, the stopper 18a is placed on the flat platen 12 by adjusting and setting the gap between the end face of the print head 4 and the line connecting the end faces of the stoppers 18a on both sides so as to have a required predetermined gap dimension. It is clear that the line connecting the end faces of the stopper 18a coincides with the surface of the flat platen 12 by directly abutting it, and naturally, the facing gap gap between the print head 4 opposite surface and the flat platen 12 is automatically set to the above set dimension. Will be the same.

In this way, since the position of the print head 4 is automatically determined in the set positional relationship with reference to the surface of the fixed flat platen 12, the stable gap interval is maintained for a long period of time. Further, there is no need for separate components or special mechanical strength or dimensional accuracy of the substrate 10 as in the conventional case.

Printing on the recording medium 13 such as a passbook or a single-cut sheet is performed in the same manner as in the prior art.

FIG. 2 is a perspective view of another embodiment of the platen applicable to the present invention.

This platen 19 has a groove 20 at one end 19a and an end 19b at the other end.
The flat portion 21 is formed on the.

With this configuration, one stopper 18a of the cover 18 is fitted into the groove 20 and abutted against it, and the other stopper 18a is abutted against the flat portion 21,
By fitting with the groove 20, the position of the printing unit 17 in the lateral direction (the length direction of the platen), that is, the position in the same direction with respect to the main body unit 2 is fixed, and the printing position deviation in the row direction is prevented.

Of course, it goes without saying that the gap between the step stopper 18a and the print head 4 is corrected.

[Effect of device]

As described in detail above, according to the printer of the present invention, it is possible to perform printing with a simple structure, good assembling property, high quality, and high reliability, and its economical effect is remarkable.

[Brief description of drawings]

FIG. 1 is a perspective view showing only a main part of a printer of the present invention, FIG. 2 is a perspective view of another embodiment of a platen applicable to the present invention, and FIG. 3 is a conventional view to which the present invention is applied. FIG. 4 is a perspective view of the printer, and FIG. 4 is a side sectional view showing a schematic configuration of the printer of FIG. In the figure, 1,16 is a printer, 2 is a main body section, 3,17 is a printing section, 4 is a print head, 5 is a carrier mechanism, 6 is an ink ribbon cassette, 7 is a motor, 8 and 18 are covers, 9 is a fulcrum, Reference numeral 10 is a substrate, 11 is a transport section, 12 is a flat platen, 13 is a medium (recording medium), 14 is a roller, 15 is an abutting section, 18a is a stopper, 20 is a groove, and 21 is a flat section.

Claims (1)

[Scope of utility model registration request] 1. A transport section (11) for transporting a medium (13) to be printed, and a flat platen (12) provided at the end of the transport section.
A main body (2) having a print head, a print head (4) configured to set a predetermined gap distance with respect to the flat platen (12), and the print head facing the flat platen (12). A printing unit (1) having a carrier mechanism (5) for moving the platen in the longitudinal direction.
7) and a substrate (10) on which the main body (2) and the printing unit (17) are mounted, the printing unit (17) includes a print head (4) for the main body unit (2). It is attached to the substrate (10) so as to be movable between a closed position facing the flat platen (12) for printing on the medium (13) and an open position separated from the flat platen (12). The part (17) is provided with a stopper (18a) that abuts a portion outside the printing area of the flat platen (12) when it is moved to the closed position, and the gear plate of the flat platen (12) and the print head (4) is provided. The interval is the above stopper (18a)
The printer is configured such that the printing section (17) is positioned with respect to the flat platen (12) by setting a predetermined gap interval by abutting the flat platen (12) on the flat platen (12).