JPS62117765A - Thermal head - Google Patents

Abstract

PURPOSE:To make it possible to shorten the time from the melting of ink to the peeling of an ink ribbon and to obtain good printing quality even to recording paper inferior in smoothness, by a method wherein a notch is provided to a heat dissipating plate to be set to a release point and one of heat generating resistor rows is arranged so that the terminal of each heat generating resistor element is positioned within a specific length from the release point and the angel of the notch is properly imparted to set a release angle. CONSTITUTION:The distance from the terminal of a heat-generating resistor element 6 to the end (the end edge of the notch 17) of a heat dissipating plate 1 is set to 1mm or less. After solid ink 13 is melted under heating by a rear heat generating resistor row 5b, an ink ribbon 11 moves over a short distance to reach a release point 19. the ink ribbon 11 can be released from recording paper 14 at the release point 19 before molten ink 16b is solidified. If a front heat generating resistor row 5a is formed in the vicinity of the rear heat generating resistor row 5b, the ink ribbon 11 can be released before the solid ink 16a melted under heating by the front heat- generating resistor row 5a is solidified. Inclination is provided to the notch 17 provided to the heat dissipating plate 1 in the thickness direction and the angle of inclination of said notch 17 is adjusted to 40-90 deg. to make it possible to optimumly select the release angle 18 of the ink ribbon.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal head mounted on a thermal transfer serial printer.

[Conventional technology]

Conventionally, there was a work of this kind, such as "Study on solid ink releasing method for printing on rough paper," which was published in the 1985 Annual Conference of the Institute of Image Electronics Engineers, 1985. It was impossible.

On the other hand, FIG. 3 is a configuration diagram showing a conventional example of a serial thermal head in which two rows of heating resistors are arranged side by side. In the figure, 1 is a heat sink, 2 is a substrate, 3 is a driver IC, 4 is a wiring pattern, 5a and 5b are heating resistor arrays, 6 is a heating resistor element, and 7' is an FPC (Flexible Pr1nt).
ed C1rcuit, flexible printed wiring)
, 8 is a common electrode.

Next, the operation will be explained. Data is serially input from the connector portion on the FPCT, converted into parallel data by the driver IC 3, and energized to the heating resistor element 6 via the wiring pattern 4. When a current is passed through the heating resistor element 6, it generates heat.

FIG. 4 is a basic configuration diagram showing the principle of ink thermal transfer recording using the thermal head of FIG.
An ink ribbon is formed by forming a solid ink layer 13 on a base film 12. ink ribbon 1
A thermal head 10 is arranged on the base film 12 side of the printer 1, and a recording paper 14 and a platen roller 15 are arranged on the solid ink layer 13 side.

In the above configuration, when the heating resistor element 6 of the thermal head 100 is energized and heated, the solid ink layer 13 is heated and melted through the base film 12 of the ink ribbon 11, and the melted portion 16a of this solid ink layer,
16b is transferred onto the recording paper 14.

The reason why there are two heating resistor rows 53 and 5b is to perform high-speed recording. When even-numbered columns of data are recorded in the front-row heating resistor row 5a and odd-numbered columns of data are recorded in the rear-row heating resistor row 5b, the recording speed is twice as high as when recording with a thermal head that has only one row of heating resistors. Can record at high speed.

[Problem that the invention seeks to solve]

The conventional thermal head as described above has a heating resistor element 6.
Since the distance 9 from the end of the ink ribbon to the end of the heat dissipation plate 1 was about several fins to a lea, the ink ribbon 11 could not be peeled off from the recording paper 14 immediately after the transfer. Further, there is a restriction that the peeling angle of the ink ribbon 11 must be determined depending on the configuration of the printer. On the other hand, the ink ribbon 11 for low-smoothness recording paper must be peeled off from the recording paper 14 at an appropriate angle before the molten ink 16 cools and hardens. was difficult to record.

This invention was made to solve the problems of the conventional ones as described above, and it can shorten the time required from melting the ink to peeling off the ink ribbon, and it can also be used for recording paper with low smoothness. An object of the present invention is to provide a thermal head that can obtain good printing quality.

[Means for solving problems]

In the thermal head according to the present invention, a notch is provided in the heat dissipation plate to serve as a peeling point, and at least one row of the heating resistor elements in a single row or a plurality of rows has an end of the heating resistor element 1 m from the peeling point. The peeling angle is set by arranging this so that it is located within the same range as above, and by appropriately setting the angle of the cut.

[Effect]

In this invention, the ink ribbon can be peeled off from the recording paper at the peeling point immediately after the ink is melted and transferred, and by providing an appropriate peeling angle with a cut at a predetermined angle, it is possible to peel off the ink ribbon from the recording paper at the peeling point. It is also possible to record with high quality.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a thermal head according to an embodiment of the present invention, in which 1 is a heat sink, 2 is a substrate, 3 is a driver IC,
4 is a wiring pattern, 5a and 5b are heating resistor rows in the front and rear rows, 6 is a heating resistor element, and 7 is an FPC1.
8 is a common electrode, and 17 is a notch provided on the heat sink 1. Here, the heating resistor array 5b in the rear row is formed at the end of the substrate 2, and the end of the substrate 2 is also pasted along the edge of the notch 17 of the heat sink 1. Here, from the end of the heating resistor element 6 to the end of the heat sink 1 (edge of the notch 19)
The distance 9 to the point is within l+u.

FIG. 2 is a configuration diagram of a recording section of a thermal transfer serial printer device equipped with the thermal head shown in FIG. 1.

Since the principle of recording is the same as that of the conventional example, the explanation will be omitted, and the operation of peeling off the ink ribbon will be explained.

First, after the solid ink 13 on the ink ribbon 11 is heated and melted by the rear heating resistor row 5b, the ink ribbon 11 moves a short distance and reaches a peeling point 19 for peeling the ink ribbon 11 from the recording paper 14. do. Therefore, the ink ribbon 11 can be peeled off from the recording paper 14 at this peeling point 19 before the melted ink 16b solidifies.

In addition, in a thermal head having a structure in which the front row heating resistor row 5a is formed near the rear row heating resistor row 5b, the solid ink 16a heated and melted in the front row heating resistor row 5a is also removed from the ink ribbon while the solid ink 16a is not solidified. 11 can be peeled off.

Further, as shown in the figure, the notch 17 provided in the heat dissipation plate 1 is inclined in the thickness direction so that the inclination angle 18 is 40° to 90°.
By adjusting within the range of 0°, the peeling angle 18 of the ink ribbon can be optimally selected. This means that the thermal head has peeling conditions, and this enables high-quality printing even on paper with low smoothness.

In the above embodiment, the heating resistor rows 5 are two rows, but the heating resistor rows 5 may be a single row or three or more rows.

〔Effect of the invention〕

As described above, according to the present invention, since the heating resistor array is arranged near the peeling point of the ink ribbon, the ink ribbon can be peeled off from the recording paper immediately after recording, and
Since the heat dissipation plate has a notch that slopes in the thickness direction, the ink ribbon can be peeled off at an appropriate angle, making it possible to easily configure a printer device that can print high quality even on low smoothness paper. .

[Brief explanation of drawings]

FIG. 1 is a block diagram of a thermal head according to an embodiment of the present invention, FIG. 2 is a block diagram explaining the recording state according to the above embodiment, FIG. 3 is a block diagram showing a conventional thermal head, and FIG. 4 is a block diagram showing a conventional thermal head. FIG. 2 is a configuration diagram illustrating a recording state by a conventional thermal head. In the figure, 1 is a heat sink, 2 is a board, and 3 is a driver IC.
, 4 are wiring patterns, 5a and 5b are heating resistor rows, 6 is a heating resistor element, 9 is a distance from the end of the heating resistor element to the end of the heat sink, 10 is a thermal head, and 17 is a notch. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Ken Hayase - Figure 1 Figure 2 1C:. 10: Two-man l'l ring 11: Gear gun 12: 1"'-171φ2 13-kunme °f link 14 Uff-mh transmission 15: Ri-27"-n 0-2 19.3-ring AN, connection Fig. 3 Figure 4

Claims (3)

[Claims] (1) In a thermal head in which a substrate having a driver IC, a wiring pattern, and a single row or multiple rows of heating resistors is pasted on a heat sink, the ink ribbon of the single row or multiple rows is pulled from the recording paper. The row of heating resistors closest to the peeling position is arranged such that the end of each heating resistor element is within 1 mm from the edge of the substrate, and a notch is formed at the edge of the heat sink, The thermal head is characterized in that its peeled-off end portion is attached to the heat dissipation plate along the edge of the notch. (2) The thermal head according to claim 1, wherein the cut has an angle of 40° to 90° with respect to the recording surface on the thermal head in the thickness direction of the heat sink. (3) The thermal head according to claim 1 or 2, characterized in that there are two rows of heating resistors, and the distance between the two rows is 3 mm or less.