JPS58171978A - Transfer type heat-sensitive printer - Google Patents

Abstract

PURPOSE:To obtain good-quality printings by a method in which a elastic part is provided between a printing element with a heating element and a receiving base to support the element, and a guide roller to push an ink ribbon is provided to the receiving base. CONSTITUTION:A printing element 1 with a heating element is rotatably supported on a receiving base 20 by means of a pin 55, and a compressive spring 53 is provided betwen the printing element 1 and the receiving base 20 to give a spring force to the lower part of the printing element 1. Furthermore, a guide roller 54 for pushing a meltable ink ribbon 11 and a recording paper 12 to a platen 13 is rotatably supported on the receiving base 20. When a solenoid 34 is operated and the receiving base 20 is inclined toward the platen 13 side at a round shaft 31 as the center, the printing element 1 is contacted with the ink ribbon 11 and the paper 12 with a proper pushing force by means of the action of a compressive spring 53. The printing element 1 may be attached through a supporting plate 5 to the receiving base 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer type thermal printing device, and particularly to the structure of a printing section.

Conventionally, in the transfer type thermal printing device of this building, as shown in FIG. It faces a platen 13 which is capable of feeding the medium 12 in the direction indicated by the arrow by a motor (not shown) across the platen 12 .

The said receiver is attached to the platen 13 on the round shaft 61 of the frame 6.
It is supported so as to be movable laterally along the platen 1 and to be tiltable relative to the platen 1, and a metal fitting 2 is attached to the upper part of the platen 1 via a shaft 21.
A bearing 23 is rotatably fixed at 2, and one end of a wire rope 24 is fixed.
Further, the wire rope 24 is wound around a pulley 26 fixed to the shaft of a wire rope motor 25, and the other end is fixed to the frame 3 (not shown).

The upper guide 27 and the lower guide 28 that sandwich the bearing 25 from above and below have dimensions slightly larger than the outer diameter of the bearing 23 at both ends thereof beyond the sliding range of the table 2. They are fixed together with a shim 29 having a shim 29 between them.

A shaft 32 is press-fitted into one side of the shim 29, and the seven shafts 62 are connected via a link 36 to a 5T moving piece 35 of an electromagnetic solenoid 34 that moves up and down. One end of a spring 37 is hung on the tip of the shaft 32, and the other end of the spring 67 is hung on a bent portion 68 of the frame 6, and the shaft 32 is rotated around the round shaft 51 during printing operations. mount 2 to spring 3
7 to maintain a gap between the printing element 1 and the platen 16. Also shaft 62
hits the upper side of the elongated hole portion 69 located in the vertical direction of the frame filter through which it passes, and its upward movement is restricted.

Next, the printing operation will be explained.

When the electromagnetic solenoid 54 is operated by a drive circuit (not shown), the movable piece 35 is moved to the spring 67 via the link 53.
while stretching the shaft 32. As a result, the upper guide 27 pushes down the upper end of the bearing 26, and the receiver pushes down the stand 2 toward the platen 13 with the round shaft 61 as the center. and the medium 12 to be printed are pressed against the platen 16. In this state, a printing circuit (not shown) operates to cause the heating element of the element 1 to generate heat, thereby performing the transfer.

When forming printed characters, the wire rope motor 25
are driven and rotated at the same time, the support connected to the wire rope 24 guides the stand 2 to the shaft roller 1 and moves in the direction of arrow B.
slide in the direction. Then, when one line of printing is completed, the electromagnetic solenoid 34 is released, and the pedestal 2 is moved to the spring 3.
The tension of 7 returns the printing element 1 to the platen 1.
Move upward from 6. By rotating the wire rope motor 25 in the reverse direction, the printing element 1 is slid together with the support 2 in the direction opposite to the arrow B direction and pulled back, and is stopped at a standby position at the time of printing start by position detection (not shown).

The ribbon winding motor 14 is rotated by a ribbon feeding drive circuit (not shown) to feed the fusible ink ribbon 11 by one printed line in the direction of arrow C, and the ribbon winding system spool 15
Wind it up.

Next, when the stand 2 is in the standby position at the start of printing, the receiver equipped with the printing element 1 drives a paper feed motor (not shown) to rotate the platen 13 and feed the medium 12 by a desired amount in the direction of the arrow. to start a new line.

By the way, in conventional transfer-type thermal printing devices, pressing during printing, which is particularly necessary, has relied on the force of the electromagnetic solenoid 34 that is stronger than the spring 67, resulting in poor printing quality, instability, and There was a drawback that when the thickness etc. of 12 were uniform and it was blank, printing was impossible.

The present invention solves the above-mentioned drawbacks by providing an elastic member between a printing element having a heating element and a stand for supporting the printing element, and further providing a separate contact area between the stand and the medium, thereby improving printing quality. Therefore, it is possible to provide an apparatus that can print on media of different thicknesses.

That is, the present invention includes a platen, a support that moves laterally along the platen and raises and lowers with respect to the platen, and a printing element that is rotatably supported by the support and has a heating element. , an elastic member that urges the printing element toward the medium to be printed, a roller that is attached to a stand and presses the ink ribbon and the medium against the platen, and a roller that presses the ink ribbon and the medium against the platen. and means for pressing the medium against the platen.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, a printing element 1 having a heating element is fixed to an element support plate 5, and the element support plate 5 is
The receiver is pivotally supported on the base 20 by pins 51 and pins 52 fitted into grooves in the base 20, and a compression spring 5 as a resilient member is installed between the element support plate 5 and the base 2o. An interposed spring 53 applies a downward spring force to the printing element 1. Further, the receiver has a guide roller 54 that presses the meltable ink ribbon 11 and the medium 12 against the platen 16 rotatably supported on the stand 20.

Next, the printing operation will be explained. By operating the electromagnetic solenoid 64, the receiver moves the table 20 around the round shaft 31 toward the platen 16 by a link (not shown) connected with a force that overcomes the spring (not shown) that pulls the table 2o upward. When tilted, the guide roller 54 provided on the stand 20 is pressed onto the platen 15 via the meltable ink ribbon 11 and the medium 12. At this time, the compression spring 53 acts on the element support plate 5 supported by the stand 20, so that the printing element 1 properly presses the meltable ink ribbon 11 and the medium 12 against the platen 13 with force.

Therefore, the printing element 1 does not rely on the force of the electromagnetic solenoid 34, but only the compression spring 55 acts on the pressing force, and the receiver 20 acts on the medium 12 and the meltable ink ribbon 11 via the guide roller 54. In order to contact
Uniform pressing while responding to changes in the thickness of the medium 12 ensures that a force is always obtained and high-quality printing can be performed.

FIG. 3 shows another embodiment of the invention.

FIG. 3 shows an example in which a bank passbook 61 having different thicknesses depending on the printing position is used in addition to the medium 12.
Without using the element support plate 5 shown in the example of FIG.
The printing element 1 is rotatably supported directly on the support base 2G using the shaft pin 55, and the above-mentioned good printing quality can be obtained, and printing is also possible on other media having different thicknesses. It is something.

In the above two embodiments, the compression spring 56 is used as the elastic member, but the elastic member is not limited to this, and it goes without saying that it is also possible to use a plate spring or the like.

As explained above, in the present invention, an elastic member is provided between the printing element and the pedestal, and the holder has a separate contact area between the pedestal and the medium, so printing quality can be improved. It has the effect of being able to handle media such as

[Brief explanation of drawings]

FIG. 1 is a partial perspective view of a conventional transfer type thermal printing device, FIG. 2 is a side view partially showing an embodiment of the present invention including a partial cross section, and FIG. 6 is a partial perspective view of a conventional transfer type thermal printing device. It is a side view including a partial cross section showing an example. 1...Printing element having a heating element 2...Base is stand 13...Platen 20...Base is stand 56...Compression spring 54...Guide roller patent applicant NEC Corporation,... −1”

Claims (1)

[Claims] (1) A platen, a support that moves laterally along the platen and raises and lowers with respect to the platen is a stand, and the support is rotatably supported by the stand and includes a printing element having a heating element. , an elastic member that urges the printing element toward the medium to be printed, a roller that is attached to a stand and presses the ink ribbon and the medium against the platen, and an elastic member that presses the ink ribbon and the medium against the platen. and a means for pressing a medium against a platen.