JPS61283563A - Thermal recording head - Google Patents

Abstract

PURPOSE:To make a titled head available as a part of the recording medium travel path to realize the device of simple construction and small-size, by setting a guide body having a curvature on the surface of a base, on which the heating element substrate is mounted, so as to be parallel to the heating element row and have a raised portion from a heating element surface level. CONSTITUTION:A guide body 15 is a round bar having a circular cross section of the curvature R and securely bonded in a concave groove 12a formed on a base 12 by use of an adhesive 18 so as to have the top which is higher than the surface of a heating element substrate 11 on which heating elements are formed by a projection (h) and parallel to the heating element row. This construction enables a desired recording to be conducted on an image receiving paper 19b by a procedure wherein a roller 20 are rotated in the direction of the arrow while heating elements 11a are selectively heated according to an image signal to feed the image receiving paper 19b and a transfer sheet 19a respectively in the direction of the arrows. At this time, the transfer sheet 19a is guided to the guide body 15. Accordingly, the thermal recording head can be utilized as a part of the recording medium travel path, enabling to reallize the device of simple construction and small-size.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a thermal recording head used in a thermal recording device.

Prior Art A conventional thermal recording head is constructed as shown in FIG.
The corner 1a of the heating element substrate 1 is approximately a right angle, and the corner is formed by manufacturing multiple heating element substrates in one piece, and finally breaking it to the required size to form the required heating element substrate 1. It was in a sharp state due to composition. Moreover, the corners had sharp and small uneven parts. Therefore, when this is used in an apparatus, the transfer sheet 2a1 as a recording medium and the image receiving paper 2b are simply brought into contact with the concave portion 1b of the heating element substrate 1, and the recording medium does not come into contact with the thermal recording head except in the concave portion 1b. It was structured like this.

For example, Monthly Paper Electronic Technology 1983 Vol.
25. No. 12, pages 48-50).

Problems to be Solved by the Invention In such a conventional thermal recording head, it is not possible to configure a running path of the recording medium due to part of the guide of the recording medium. Therefore, when a conventional thermal recording head is used, there are restrictions on the design of the device, and there are problems in that the device becomes complicated and the device becomes large.

The present invention is intended to solve these problems, and aims to enable use as part of the travel path of a recording medium, and to simplify and downsize the configuration.

Means for Solving the Problem In order to solve this problem, the present invention provides a heat generating system in which a plurality of heating elements are formed in a row, and a common electrode and individual electrodes are extended in a direction perpendicular to the row of heating elements. The heating element includes a heat generating body substrate, a base on which the heat generating body substrate is attached, and a guide body that is parallel to the heat generating element rows, protrudes from the heat generating body surface, and has a curvature on the side of the heat generating body substrate mounting surface of the base.

Function: With this configuration, it is possible to use a heat-sensitive recording head provided with a guide body as part of the travel path of the recording medium. Further, by using the RAD for heat-sensitive recording, it is possible to simplify and downsize the apparatus configuration.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

First, a first embodiment shown in FIGS. 1 to 4 will be described.

FIG. 1 is a side view of the thermal recording head, 11 is a heating element substrate, 12 is a base, 13 is a semiconductor element for driving the heating element, 14 is a printed circuit board for wiring, 15 is a guide, 16 is a protective cover, 17 is a connector.

The heating element substrate 11 has a heating element 11a as shown in FIG.
:) are arranged across the recording width, and an individual electrode 11b and a common electrode 11c are formed in a direction perpendicular to the heating element array. The common electrode 11c is separated near the connection part with the heating element 11a, and is then integrated.
Printed board 1 for installation with lead wires 11d from both sides
Connected to 4. The individual electrodes 11b are separated from each other, and one end is connected to the heating element 11a, and the other end is connected to the semiconductor element 13 for driving the heating element. Semiconductor element 1 for driving heating element
3 is connected to the wiring printed board 14, and an image signal is input from the device through the connector 17, and the heating element 11a is driven to generate heat according to the image signal! ! Control. The heating element substrate 11 is configured as described above, and is fixedly attached to the base 12 with an adhesive or the like. The wiring printed board 14 is connected to the heating element 1 from the device.
It is provided with a wiring pattern (not shown) necessary for driving 1a to generate heat, and has a connector 17 for electrically connecting it to the device, and is fixed to the base 12 with adhesive or the like. As shown in FIG. 3, the guide body 15 is a round bar with a cross-sectional shape having a curvature R, and the apex thereof protrudes from the heating element forming surface of the heating element substrate 11 in a concave groove 128 formed in the base 12 ( It is adhesively fixed with an adhesive 18 as shown in h) in the figure and parallel to the row of heating elements. The amount of protrusion of the guide body 15 may be changed depending on the configuration of the device used. Further, the guide body 15 is provided close to the end of the heating element substrate 11 in order to make the thermal recording head compact. By attaching the guide body 15 to the base 12 first in the assembly process, if the heat generating body board 11 is brought into contact with the guide body 15 when the heat generating body board 11 is attached to the base 12, it is possible to attach the heat generating body board 11 to the base 12. This is convenient, and the position of the heating element 11a relative to the base 12 can also be stabilized. The protective cover 16 protects the heating element driving semiconductor element 13 and its connection parts, and protects the heating element substrate 11 and the wiring printed board 1.
It is glued and fixed on G.

FIG. 4 is a side view showing the state of use of the thermal recording head. In the figure, a heating element 11a is pressed against a roller 20 via a transfer sheet 19a, which is a recording medium, and an image receiving paper 19b. The transfer sheet 19a is composed of a heat-resistant sheet (not shown) coated with a coloring material m<not shown, and the surface of the coloring material layer is in contact with the image receiving paper 19b, and the coloring material layer is heated by the heating element 11a. Recording is performed by transferring the image onto the image receiving paper 19b.

As a coloring material layer, one using a heat sublimable dye and the other using a heat melting ink are generally well known. Either one may be used, or a direct coloring type (in this case, the transfer sheet 19a is not required) heat-sensitive recording paper may be used. The roller 20 is rotated in the direction of the arrow while the heating element 11a is selectively heated in accordance with the image signal, and the image receiving paper 1 is rotated.
By transporting the 9b1 transfer sheet 19a in the direction of the arrow, desired recording can be performed on the image receiving paper 19b. The transfer sheet 19a is configured to be guided by the guide body 15. At this time, the guide body 15 protrudes by h from the heating element arrangement surface of the heating element substrate 11, so that the heating element 1 is attached to the heating element substrate 11.
It is sufficient to make contact only at part 1a. If this is used continuously for a long time, the temperature of the heating element substrate 11 will rise, which will have a considerable effect on printing quality, but this configuration can prevent this. In addition, when using a heat-melting color material layer, the transfer sheet 19a is heated by the heating element 11a, and after traveling a certain distance in contact with the image-receiving paper 19b, the image-receiving paper 19b and the transfer sheet 19a are separated. Although these requirements differ depending on the recording method or recording conditions, such as the ability to improve printing quality by using a heat-sensitive recording head, it is possible to set the distance between the heating element 11a and the guide body 15 as a single thermal recording head according to the device. It is also possible to stabilize the print quality. The guide member 15 allows the conveyance path of the recording medium to be configured toward the thermal recording head side at a position close to the heating element position, as shown in the figure, without providing a guide member in the apparatus.

FIG. 5 is an enlarged side view of the main part of the heat-sensitive recording head in the second embodiment, which differs from the first embodiment in that the guide body 15 is made of a thin elastic member.

The guide body 15 made of a thin plate elastic member is curved so as to have a curvature near the top, is fitted into the concave groove 12a of the base 12, and is attached to the base 12 by the elastic force of the guide body 15. By configuring the guide body 15 with a thin elastic member, the guide body 15 can be easily attached to the base 12 without adhesion or the like.
It is something that can be attached to
) FIG. 6 is an enlarged side view of the main part of the thermal recording head in the third embodiment, and the difference from the first and second embodiments is that the guide body 15 is configured to be freely rotatable.

In this case, mounting plates 21 are attached to both sides of the base 12 with screws 22, and the guide body 15 is rotatably held on the mounting plates 21. By making the guide body 15 rotatable,
The running load on the recording medium can be reduced. It goes without saying that the mounting plate 21 may be formed integrally with the base 12.

FIG. 7 is an enlarged side view of the main part of the thermal recording head in the fourth embodiment, which differs from the first, second and third embodiments in that the guide body 15 is formed integrally with the base 12. In this case, a convex portion whose top portion has a radius of curvature R' is formed on the base 12 close to the end surface of the heat generating substrate 11, and the guide body 15 is integrally formed with the base 12.

If they are integrated, the guide body 15 can be easily formed by extrusion or the like when manufacturing the base 12, and costs can be reduced. In addition, it can be used as a mounting standard for the heating element board 11, making assembly easier and the base 1
The heating element can be attached to No. 2 with high positional accuracy.

Although the first to fourth embodiments have been described above, if the recording medium guide body is provided integrally with the thermal recording head so as to be parallel to the heating element array and its apex protrudes from the heating element forming surface. It goes without saying that the present invention is not limited to the embodiments described above.

Effects of the Invention As described above, according to the present invention, the thermal recording head can be used as part of the travel path of the recording medium. or,
This makes it possible to simplify and downsize the am, and is extremely useful in practice.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the thermal recording head of the present invention, in which FIG. 1 is a side view, FIG. 2 is an enlarged perspective view of the main part of the heating element substrate, and FIG. 3 is a guide. FIG. 4 is an enlarged side view of the main part of the body installation part; FIG. 4 is a side view showing the state in which the thermal recording head is used;
5 to 7 show the second to fourth parts of the thermal recording head of the present invention.
FIG. 8 is an enlarged side view of the main part of the embodiment, and FIG. 8 is a side view of a conventional thermal recording head. 11...Heating element board, l1a-...Heating element, 11b-
...Individual electrode, 110-...Common electrode, 12...Base, 13...Semiconductor element for driving heating element, 15...Guide agent Yoshihiro Morimoto Figure 1 Figure 3 Figure 5 Figure t Figure 6 Figure 7 Figure 15.

Claims (1)

[Scope of Claims] 1. A heating element substrate comprising a plurality of heating elements formed in a row and a common electrode and individual electrodes extending in a direction perpendicular to the heating element row, and a base on which the heating element substrate is mounted. and a guide member having a curvature and protruding from the heating element surface parallel to the heating element array on the heating element substrate mounting surface side of the base. 2. The thermal recording head according to claim 1, wherein the guide body has a circular cross section in a direction perpendicular to the heating element array. 3. The heat-sensitive recording head according to claim 1, wherein the guide body is made of a thin plate elastic member and is curved in a direction perpendicular to the row of heat generating elements. 4. The thermal recording head according to claim 1 or 2, wherein the guide body is configured to be rotatable. 5. A concave groove parallel to the row of heat generating elements is provided at the end of the heat generating element board mounting surface of the base, and a guide body is attached to this groove as claimed in claim 1, 2, or 3. The thermal recording head described. 6. Claim 1 in which the guide body is integrated with the base
The thermal recording head described in Section 1.