JPH03254969A - Thermal printing apparatus - Google Patents

Abstract

PURPOSE:To prevent a printing paper from separating from a platen roller by arranging an electric circuit for a thermal head so as to be closer to outlet of this apparatus than a point wherein the thermal head and the platen roller contact with each other. CONSTITUTION:An electric circuit 1a for dividing a heat generating body of a thermal head 1 is arranged in the thermal head 1 so as to be closer to an outlet than a point wherein the thermal head 1 is in contact with a platen roller 2. When a roll-like thermal printing paper 3 is set to a thermal printing apparatus 10, the thermal head 1, an inlet side upper guide 4b, an outlet side upper guide 5b and the like are upwardly opened, and a front end 3a of the roll-like printing paper 3 is put on the platen roller 2. After that, when the thermal head 1, the inlet side upper guide 4b, the outlet side upper guide 5b and the like are closed, there is not anything that pushes down the printing paper 3 in the inlet side of the thermal head 1. Consequently, the front end 3a of the printing paper 3 does not separate from the platen roller 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a thermal recording device used in facsimiles and the like.

[Conventional technology]

FIG. 3 is a cutaway diagram showing a conventional thermal recording apparatus 00. In the figure, (1) is a thermal recording head, and (1a)
is an electric circuit installed in the thermal recording head to drive the heating element of the thermal recording head.

(2) is rotated by a power source (not shown) while pressing the roll of thermal recording paper (3) against the heating element of the thermal recording head (1) with a platen roller.
3), and is generally a thermal recording head (
4b) is the upper entrance guide, (5a) is the lower outlet guide, and (5b) is the upper exit guide. (6) is a cutter.

Next, the operation will be explained.

In the heat-sensitive recording device a0 configured as described above, 'C10
- When installing the roll-shaped thermal recording paper (3), as shown in Fig. 4, the thermal recording head (L) and the upper entrance guide (4)
b) Open the upper exit guide (5b) upwards and insert the leading end (3a) of the roll of recording paper (3) into the cutter (6).

[The problem that the invention attempts to solve]

Since the conventional thermal recording device (10) is configured as described above, when trying to attach the recording paper to the roll (3), the tip (3a) of the recording paper (3a) is simply placed on the platen roller (2). Now, as shown in Fig. 5, when the thermal recording head (1) etc. are connected, the electric circuit (1a) and the artificial upper guide (4) are connected.
b) causes the roll-shaped recording paper (3) to be pushed down, and its leading edge (3a) comes off the platen roller (2), resulting in an inconvenience. Therefore, the tip of the recording paper (3)
+a (3a) and the platen roller (2), it was necessary to place it sufficiently on the exit side, and there was an inconvenience such as having to insert it between the cutter (6). Also, the recording paper placed (
3) The paper on the exit side of the platen roller (2) could not be recorded and wasted paper.

This invention was made to solve the problem of the same order as described above, and simply moves the leading edge (3a) of the recording paper to the platen roller (
2) It is an object of the present invention to provide a heat-sensitive recording device that only needs to be placed on the paper and that does not produce waste paper that cannot be recorded.

[Means to solve the problem]

In the thermal recording device according to the present invention, the electric circuit provided in the thermal recording head is installed on the exit side of the device from the point where the thermal recording head and the platen roller come into contact.

[Effect]

In the thermal recording device of this invention, even when the thermal recording head, etc. is opened upward and the C1 recording paper is mounted, and the thermal recording head, etc. is closed, there is nothing to push down the recording paper. However, it does not come off the platen roller.

[Embodiments of the invention]

FIG. 1 shows a thermal recording device αO showing an embodiment of the present invention.
It is. In the figure, (, (la) is a thermal recording head (1
) is an electric circuit for driving the heating element of this thermal recording head (1), and as shown in Fig. It is installed in the thermal recording head (1) on the exit side of the
There is C. Otherwise, the configuration is the same as that of the conventional device shown in FIG.

When installing the rolled thermal recording paper (3) in the thermal recording device α0, as shown in FIG. 2, the thermal recording head (1>inlet 1 side guide (4, b), exit The upper guide (5b) and the like are opened upward, and the leading end (3a) of the roll-shaped recording paper (3) is placed on the platen roller (2).

After that, the thermal recording head (1), the artificial upper guide (
4b) Close the exit side guide (5b), etc., but since there is no structure on the artificial side of the thermal recording head (1) that pushes down the recording paper (3), the thermal recording paper (3) The tip of (
3a) will not come off the top of the platen roller (2).

〔Effect of the invention〕

As described above, according to the present invention, the l1il of the thermal head
l! The dynamic electric circuit is installed closer to the exit of the device than where the thermal head and platen roller contact each other.
When loading thermal recording paper, it is only necessary to place the leading edge of the thermal recording paper on the platen roller, thus eliminating the hassle of having to insert the leading edge of the recording paper between the cutters. At the same time, it has the effect of eliminating wasted paper that cannot be recorded.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view showing a thermal recording device according to an embodiment of the present invention, FIG. 2 is a cross-sectional side view showing the operation of the present invention, and FIG. 3 is a cross-sectional side view showing a conventional thermal recording device. Figure, 4th
．． FIG. 5 is a cross-sectional view showing the operation of a conventional thermosensitive recording device. In the figure ([) is the thermal recording head, (1a) is the electric circuit, (
2) is a platen roller, (3) is a roll of thermal recording paper,
αQ is a thermal recording device. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A thermal recording device comprising a thermal recording head, an electric circuit provided in the thermal recording head for driving a heating element, and a recording paper that is conveyed while being held between a plantain roller that comes into contact with the thermal recording head, A thermal recording device characterized in that the electric circuit is disposed on the exit side of the device from the point where the thermal recording head and the platen roller come into contact.