JPH03138175A - Printer - Google Patents

Abstract

PURPOSE:To enable a highly reliable printer with a simple structure to be obtained by a method wherein a thermal head is fixed to a printer substrate. CONSTITUTION:A thermal head 3 is equipped with seat guides 3e, 3f on both ends and is fixed to a substrate. A platen roller 6 moves between an initial position (m) and a thermal head pressing position (n), and a recording means is composed of the thermal head 3 and the platen roller 6. Further, a main cam gear 14 is equipped with cam grooves 14a, 14b and a cam side face 14d, and is rotated around a shaft 14c by means of a main driver 12. Then, the main cam gear 14 is installed horizontally on a bottom plate of a printer substrate. At the same time, drive of the platen roller 6, drive of a pinch roller 8, and drive of an image receiving paper push up plate 16 are performed with this main cam gear 14. Thereby, the subject printer becomes a simple structure material and comes to have a highly reliable mechanism.

Description

[Detailed description of the invention] It is about evening.

Conventional technology In recent years, full-color video printers with excellent resolution and color reproducibility have begun to become popular with the advent of thermal transfer printers.
Increasing rationalization is required. An example of the above-mentioned conventional thermal transfer video printer will be described below with reference to the drawings.

5 and 6 show the configuration of a conventional thermal transfer video printer.

FIG. 5 is a plan view, and FIG. 6 is a sectional view taken along line XX in FIG. In these drawings, reference numeral 1.2 is a board of the printer device, and the board 2 is provided with a cassette insertion slot. 3 is a thermal head that moves between an initial position m and a rotating pressing position n of the platen roller 6 (the thermal head 3 and the platen roller 6 constitute a recording means). 3d is a rotating plate that supports the thermal head 3 at its left end, has a protrusion 3g in the middle, engages with the cam groove 14a, and rotates about the shaft 3c. 3e
+3f is a sheet guide. 4 is an image receiving paper, and 5 is a sheet coated with yellow, magenta, and cyan dyes. The platen roller 6 comes into contact with the thermal head 3 via the image receiving paper 4 and the sheet 5.

A capstan roller 7 works in conjunction with the pulse motor 13 to accurately feed the image receiving paper 4. Reference numeral 38 denotes a pinch roller which can be pressed against the capstan roller 7 via the image receiving paper 4 and moves between the initial position m and the rotating pressing position n of the capstan roller 7 (the capstan roller 7 and the pinch roller 38 (constitutes image receiving paper feeding means). 38d is a rotating plate that supports the pinch roller 38 at the left end and supports the cam groove 34b at the right end 38e.
and rotates around 38c. 38f is a spring for bringing the pinch roller 38 into contact with the capstan roller 7. Reference numeral 8 denotes a cassette in which the sheet 5 is rolled up, and includes the sheet 5, a handle portion 9a, and a lower surface 8b of the cassette. 10 is a reel winding device that transports the sheet 5 while winding it up. Reference numeral 11 denotes a pressing spring for pressing the thermal head 3 against the platen roller 6. 12 is a main drive device, and 13 is a paper feeding rotation device for rotating the capstan roller 7 and the paper feeding device, which uses a pulse motor. 13a is an intermediate gear. A main cam gear 34 has cam grooves 34a and 34b, and is rotated by the main drive device 12. A sensor 15 detects the image receiving paper 4. Reference numeral 38 denotes a paper push-up plate, which rotates around a shaft 38c between an initial position m and a position n where the image-receiving paper 4 presses against the paper feeder 18 (the paper push-up plate 36, the paper feeder 18, and the paper feed roller 19
and the paper feed driven roller 20 constitute an image receiving paper takeout/feeding means).

Further, the shaft 38e engages with the connecting plate 24, and the left end 36d pushes up the image receiving paper 4. 17 is a paper cassette.

Reference numeral 18 denotes a paper feeding device, which rotates together with a paper feeding driven roller 20 as the paper feeding roller 19 rotates. The paper feed roller 19 is connected to the shaft 19
a, and is provided with a gear portion 19b at one end. The paper feed driven roller 20 has a shaft 20a. Reference numeral 21 denotes a rotational center axis of the main cam gear 14, which passes through the substrates 1 and 2 and is coupled to the hollow cam 22. Holo Arkham 22
is provided with a cam groove Z2a. 23 is a hollow board,
A protrusion 23a is provided at the center to engage with the cam groove 22a, a protrusion 23b is provided at the tip to engage with the connecting plate 24, and the shaft 2
Rotates around 3c. The connecting plate 24 engages with the shaft 3Ete of the paper push-up board 38 and controls the paper push-up board 36.

The operation of the conventional thermal transfer video printer configured as described above will be described below.

First, the cassette 9 is inserted and set inside the insertion opening of the board 2. Next, the main drive device 12 starts operating,
The interlocking main cam gear 34 also rotates counterclockwise around the rotation center shaft 21.

The hollow gum 2 connected to the rotation center shaft 21
2 also rotates counterclockwise. Subsequently, the follower plate 23 engaged with the cam groove 22a also rotates clockwise about the shaft 23c. The connecting plate 24 is connected to the protrusion 23 of the follower plate 23 at the right end.
b, so it moves to the left and pushes the shaft 38e of the paper push-up board 36 with its left end. Therefore, the paper pushing plate 36 rotates clockwise from the initial position m to the pressing position n,
The main drive device 12 stops at that position. During this time, the image receiving paper 4 stored in the paper cassette 17 is pushed up by the left end 36d of the paper push-up plate 36 and pressed against the paper feeding device 18.

Next, the paper feeding rotation device 13 starts operating, and the intermediate gear 13
a, the gear portion 19b engaged therewith also rotates counterclockwise. The paper feed roller 19 including the gear portion 19b also starts rotating. The paper feed roller 19 rotates counterclockwise, and the paper feed device 18 made of a rubber belt also rotates counterclockwise in conjunction with the paper feed driven roller 20.

Therefore, the image receiving paper 4 pressed against the lower surface of the paper feeder 18 is transferred to the right. Then, the capstan roller 7 and the pinch roller 38 send it to the position of the sensor 15 .

Subsequently, the operation of the main drive device 12 is restarted, the main cam gear 34 further rotates counterclockwise, and first, the follower plate 23 is rotated counterclockwise by the cam groove 22a, and the receiving paper 4 is fed. It is moved a little away from the paper device 18 and is in a state where it is not transported. On the other hand, the rotating plate 38d is rotated by the shaft 38e engaged with the cam groove 34b, and is rotated counterclockwise about the shaft 38c. Then, the pinch roller 38 moves from the initial position m to n, and the image receiving paper 4 is pinched.

Next, the paper feed rotation device 13 restarts its operation, and the image receiving paper 4 is conveyed to the right while being held between the interlockingly rotating capstan roller 7 and the pinch roller 38, and reaches a predetermined position and stops. . Next, the main drive device 12 is reactivated, the main cam gear 34 also further rotates counterclockwise, and the protrusion 3g engages with the cam groove 34a, causing the rotation plate 3d to rotate around the rotation center axis 8c. Then, the thermal head 3 moves from the initial position m to the position n where it presses against the platen roller 6 via the image receiving paper 4 and the sheet 5, and is pressed against the platen roller 6 by the press spring 11. In this state, the seat 5 is positioned below the cassette lower surface 9b and is in a running state.

Thereafter, the paper feed rotation device 13 starts operating in the opposite direction, and the image receiving paper 4 is transferred to the left by the rotation of the capstan roller 7, and at the same time, the sheet 5 also starts to be transferred to the left by the reel drive device 10. Then, thermal transfer is performed by the thermal head 3.

Problems to be Solved by the Invention However, in the conventional configuration as described above, the drive of the thermal head, pinch roller, and paper pushing plate is controlled remotely, resulting in a complex configuration with a large number of parts and a mechanism. The load also increased, and there were issues in maintaining reliability. In view of the above problems, the present invention provides a recording means and a receiving paper feeding means.

Another object of the present invention is to provide a highly reliable φ≠ size printer that has a simple structure for receiving paper take-out and feeding means.

Means for Solving the Problems In order to achieve the above objects, the printer of the present invention has the following features:
A first roller that presses the image receiving paper in the recording means section, a first support member that movably supports the first roller, and a second roller that presses and drives the image receiving paper in the image receiving paper feeding section. a second supporting member movably supporting the second roller; a receiving paper pressing member for applying a pressing force to the receiving paper in the receiving paper take-out/feeding unit; and a pressing drive means for pressing the roller and the image receiving paper pressing member.

Operation With the above configuration, the pressing driving means is disposed near the recording means section, the receiving paper feeding section, and the receiving paper take-out/feeding section, so that the pressure of the first roller, the second roller, or the receiving paper pressing member is The first support member, the second support member, and the image-receiving paper pressing member are pressed by the pressing driving means at a position corresponding to the approximately central position.

Embodiment Hereinafter, a video printer according to an embodiment of the present invention will be described with reference to the drawings. FIGS. 1, 2, 3, and 4 are explanatory diagrams showing an outline of the configuration of a video printer according to an embodiment of the present invention.

FIG. 1 is a plan view, FIG. 2 is a first XX sectional view, and FIGS. 3 and 4 are operation explanatory diagrams showing the initial position and pressing position of the paper pushing plate (pinch roller and platen roller). .

In these drawings, 1.2 is the board of the printer device,
The board 2 is provided with a cassette insertion slot. 3 is a thermal head which is provided with sheet guides Se and 3f at both ends and is fixed to the substrate. 4 is receiving paper, 5 is yellow, magenta.

This is a sheet coated with cyan dye. A platen roller 6 moves between an initial position m and a thermal head pressing position n (the thermal head 3 and platen roller 6 constitute a recording means). Reference numeral 8d denotes a rotating plate, which has the platen roller 8 at one end and an engaging portion 6e that engages with the cam groove 14a of the main cam gear 14 at the other end, and is rotatable about the shaft 6C. 7 is a capstan roller and pulse motor 13
In conjunction with this, the receiving paper is fed accurately. Reference numeral 8 denotes a pinch roller which can be pressed against the capstan roller 7 via the image receiving paper 4 and moves between the initial position m and the rotating pressing position n of the capstan roller 7 (capstan roller 7 and pinch roller 8). constitutes the receiving paper feeding means). 8d is a rotating plate that supports the pinch roller 8 at one end and supports the cam groove 14b at the other end 8e.
and rotates around the shaft 8C. 8f is a spring for bringing the pinch roller 8 into contact with the capstan roller 7.

Reference numeral 9 denotes a cassette in which sheets are rolled up, and includes the sheet 5, a handle portion 9a, and a lower surface θb of the cassette. 10 is seat 5
This is a reel winding device that winds up. 11 is a spring for pressing the platen roller 6 against the thermal head 3;
2 is a main drive device. Reference numeral 13 denotes a paper feeding rotation device for rotating the capstan roller 7 and the paper feeding device 18, and uses a pulse motor. 13a is an intermediate gear. 14 is a main cam gear with cam grooves 14a and 14b.
1 and a cam side surface 14d, centered around the shaft 14c,
It is rotated by a main drive device 12. A sensor 15 detects the image receiving paper 4. Reference numeral 16 denotes a paper push-up plate, which rotates around a shaft 16c between an initial position m and a position n where the image-receiving paper 4 presses against the paper feed device 18 (the paper push-up plate 16, the paper feed device 18, and the paper feed roller 19 and the paper feed driven roller 20 constitute a receiving paper takeout/feeding means.
pushes up the receiving paper 4. 17 is a paper cassette. 1
Reference numeral 8 denotes a paper feeding device, which rotates together with a paper feeding driven roller 20 as the paper feeding roller 19 rotates. 19 is the paper feed roller, axis 1
9a, and a gear portion 19b at one end. 20
is a paper feed driven roller and has a shaft 20a. Reference numeral 25 denotes a bottom plate of the printer board, on which the main cam gear 14 is installed.

The operation of the video printer of this embodiment having the above configuration will be explained.

First, the cassette θ is inserted and set inside the insertion opening of the board 2. Next, the main drive device 12 starts operating, and the main cam gear 14 interlocked therewith also rotates counterclockwise around the shaft 14c. Then, the right end lee of the paper push-up plate 16 is pushed by the cam side surface 14d of the main cam gear 14. Therefore, the paper push-up plate 16 rotates clockwise from the initial position m to the pressing position n (FIGS. 3 and 4), and the main drive device 12 stops at that position. During this time, the image receiving paper 4 stored in the paper cassette 17 is pushed through the left end LED of the paper pusher plate 16.
is pushed up and pressed against the paper feeder 18. Next, the paper feed rotation device 13 starts operating, rotates the intermediate gear 13a,
The gear portion 19b engaged therewith also rotates counterclockwise. The paper feed roller 19 including the gear portion 19b also starts rotating.

The paper feed roller 19 rotates counterclockwise, and the paper feed device 18 made of a rubber belt also rotates counterclockwise in conjunction with the paper feed driven roller 20.

Therefore, the image receiving paper 4 that has come into contact with the lower surface of the paper feeder 18 is transferred to the right. Then, it passes between the capstan roller 7 and the pinch roller 8 and is sent to the sensor 15 position.

Subsequently, the operation of the main drive device 12 is resumed, and the main cam gear 14 further rotates counterclockwise. However, since the position of the cam side plate 14d approaches the shaft 14c, the paper pushing plate 16 rotates counterclockwise. , the image receiving paper 4 is slightly separated from the paper feeding device 18 and is not transported. On the other hand, the rotating plate 8d is rotated by the engaging portion 8e that engages with the cam groove 14b, and the shaft 8
It is rotated clockwise around c. Then, the pinch roller 8 moves from the initial position m to the pressing position n (FIGS. 3 and 4), and the image receiving paper 4 is pinched.

Next, the paper feed rotation device 13 restarts its operation, and the image receiving paper 4 is transferred to the capstan roller 7, which rotates clockwise.
It is pinched by the pinch rollers 8 and transferred to the right until it reaches a predetermined position and stops. Next, the main drive device 12 is reactivated, the main cam gear 14 is also further rotated counterclockwise, and the rotating plate 6d is moved to the engaging portion 6e that has engaged with the cam groove 14a.
is rotated counterclockwise around the axis θC.

Then, the platen roller 6 moves from the initial position m to the pressing position n.
Moving on (FIGS. 3 and 4), the image receiving paper 4 and the sheet 5 are held between the thermal head 3 and the platen roller 6. In this state, the seat 5 is positioned below the cassette lower surface 9b and is in a running state. Thereafter, the paper feed rotation device 13 starts operating in the opposite direction, and the image receiving paper 4 is transferred to the left by the counterclockwise rotation of the capstan roller ruff, and at the same time, the sheet 5 is also transferred to the left by the reel drive device 10. Start. Then, thermal transfer is performed by the thermal head 3.

As described above, according to this embodiment, when the main cam gear is installed horizontally on the bottom plate of the printer board,
This main cam gear drives the platen roller, the pinch roller, and the receiving paper push-up plate.
It becomes a simple structure and a highly reliable mechanism.

Although this embodiment has been described using a video printer, it is of course possible to apply the present invention to a general printer, and is not limited to a video printer.

Effects of the Invention As described above, in the present invention, the pressing drive means is disposed near the recording means section, the image receiving paper feeding means section, and the image receiving paper taking out/feeding means section, and the pressure driving means is disposed near the recording means section, the image receiving paper feeding means section, and the roller of the recording means section or the image receiving paper feeding means. By arranging the roller or the receiving paper pressing member of the receiving paper take-out/feeding means near the center and below, it is possible to obtain a simple configuration and a highly reliable FF printer.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a video printer according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line XX of the same embodiment, and FIGS. 3 and 4 show a paper pushing plate, a pinch roller, FIG. 6 is a sectional side view of a main part showing the initial position and pressing position of the platen roller, FIG. S is a plan view showing the configuration of a conventional video printer, and FIG. 6 is a sectional view taken along line XX in FIG. 1.2... Board of printer device, 3... Thermal head, 4... Receiving paper, 6... Platen roller, 7... Capstan roller, 8... Pinch roller, 14...・Main cam gear, 14a,
14b...Cam groove, 16...Paper push-up plate, 18.
・・Paper feeding device, 19 ・・Paper feeding roller, 2o・
...Paper feed driven roller.

Claims (1)

[Scope of Claims] (1) A printer device substrate, a thermal head, a platen roller provided so as to be able to come into contact with the thermal head via a receiver paper and a sheet, and a driving means for moving the platen roller; a transport means for transporting the receiver paper;
A printer comprising: a cassette containing a sheet coated with a dye; and a reel drive means for transporting the sheet, wherein the thermal head is fixed to the printer substrate. (2) a first roller that presses the image receiving paper in the recording means section;
a first support member that movably supports the first roller; a second roller that presses and drives the image receiving paper in the image receiving paper feeding unit; and a second roller that movably supports the second roller. and a pressing drive means for pressing the first roller and the second roller, the pressing driving means being disposed near the recording means section and the receiving paper feeding means section, and . A printer characterized in that the first support member and the second support member are pressed by the pressing driving means at a position corresponding to a substantially central position of the first roller or the second roller. (3) A first roller for pressing the image receiving paper in the recording means section, a first support member for movably supporting the first roller, and a first roller for pressing and driving the image receiving paper in the image receiving paper feeding means section. a second roller, a second supporting member for movably supporting the second roller, a receiving paper pressing member for applying a pressing force to the receiving paper in the receiving paper taking out/feeding means section; a pressing drive means for pressing a first roller, a second roller, and the image-receiving paper pressing member; disposed near the means part and at a position corresponding to a substantially central position of the first roller, the second roller, or the image-receiving paper pressing member;
A printer characterized in that the first supporting member, the second supporting member, and the receiving paper pressing member are pressed by the pressing driving means. (4) A printer characterized in that the pressing drive means according to claim 2 or 3 is constituted by one cam.