JPS6343089Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thermal printer, and particularly to a thermal printer capable of printing in multiple colors.

[Conventional technology]

Conventionally, a printing tape containing a heat-melting material is placed between a recording paper and a thermal head, and a plurality of heat generating elements provided in the thermal head are selectively heated as the thermal head moves. A thermal printer has been proposed in which a heat-melting material is melted and transferred onto recording paper. This thermal printer has the advantage of not producing noise during printing, and also has the advantage of not being restricted by the type of recording paper used.

[The problem that the idea aims to solve]

By the way, this conventional thermal printer has
Some printers have a thermal head supported on a cartridge that can reciprocate along the platen, and a tape cassette that stores the printing tape attached to the cartridge. Separate motors were used to release the pressure weld and place the tape cassette at the desired height, making the configuration complex, and the installation of many motors not only made it expensive, but also large and heavy. There is a problem with this.

The present invention has been made in view of the actual situation in the prior art, and its purpose is to provide a thermal printer capable of printing in multiple colors with a simple and inexpensive structure.

[Means to try to solve the problem]

To achieve this purpose, the present invention includes a frame forming a main body, a platen around which recording paper is wound, a carriage movable along the platen, and a frame mounted on the carriage so as to face the platen. a thermal head disposed on the carriage; printing tapes of multiple colors made of a heat-melting material and arranged in parallel in the width direction; a tape cassette in which the printing tapes are stored; and movement of the carriage. Equipped with a tape winding mechanism that winds up the printing tape according to the operation, the printing tape is placed between the recording paper wound around the platen and the thermal head, and by pressing the thermal head against the platen, multiple pieces of printing tape are rolled up on the recording paper. A thermal printer that performs color printing includes a motor, a gear mechanism for transmitting the driving force of the motor to a first cam, a second cam, and a third cam, and a working surface of the first cam. abutting,
a head pressure release mechanism that presses the thermal head against the platen and releases the pressure contact through a member that is displaced by the rotation of the cam; The movable body is moved via a member that is displaced by the movable body, and the gear provided on the movable body is displaced in accordance with the displacement of the movable body, thereby winding the printing tape from the drive source. a tape winding stop mechanism that cuts off the power transmission path to the take-up shaft, stops the rotational drive of the take-up shaft, and stops the winding operation of the printing tape; By moving the tape cassette support member up and down through a member that is in contact with the tape and is displaced by the rotation of the cam, the tape cassette placed on the support member is placed at a desired height position, and the desired color is applied. The printer is equipped with a cassette shift mechanism that places the printing tape between the recording paper and the thermal head.

〔Example〕

Hereinafter, the thermal printer of the present invention will be explained based on the drawings.

Figures 1a, b, c, and d are explanatory diagrams showing the overall configuration of an embodiment of the present invention; Figure 1a is a plan view;
Figure b is a front view, Figure 1c is a right side view, and Figure 1d is a left side view.

First, the carriage drive mechanism and paper feeding mechanism provided in this embodiment will be described based on FIGS. 1a to 1d.

In these figures, 1 is a frame forming the main body, 2 is a platen around which recording paper is wound, and 3 is a platen rubber attached to the front surface of the platen 2 at a printing position. 4 is a carriage movable along the platen 2; 5 is a thermal head arranged to face the platen 2; 6 is a carriage 4;
A tape cassette is placed on top of the tape cassette.

7 is a rotatable shaft extending along the platen 2 and passing through the carriage 4;
is a cam integrated with this shaft 7, Fig. 1d
9 is a worm wheel that is connected to the cam 8 and is integrally provided with the shaft 7, 10 is a worm that engages with the worm wheel 9, and 11 is a stepping motor that rotates the worm 10. The above-mentioned cam 8 is provided in the shape shown in the side view of FIG. 2a and the front view of FIG. 2b, for example.
A groove 12 having the characteristics shown in FIG. 2c is formed on the side surface. Note that FIG. 2b corresponds to a view seen from the left side of FIG. 1b.

Reference numeral 13 shown in Fig. 1a is a lever having one end that engages with the groove 12 of the cam 8, and is rotatable around a support shaft 14, and the other end is rotated in the left-right direction in Fig. 1a. The slider 15 is engaged with the body of the slider 15, which is movable. Note that this slider 15 is rotatably provided integrally with the output shaft of a stepping motor 16, and gears are formed on both sides. The gears on both sides of the slider 15 are gears 17 and 18 loosely fitted to the output shaft of the stepping motor 16.
is selectively engageable.

A gear 19 engages with the gear 17 and rotates integrally with the gear 17, and a helical gear 20 is attached to the side.
have. 21 is a helical gear that engages with the helical gear 20, and the pulley 2 has a protrusion 22 on the circumferential side.
It is integrated into 3. A metal belt 24 is connected at both ends to the carriage 4, and has a square hole 25 that engages with the protrusion 22 of the pulley 23. 26 is arranged on the opposite side of the pulley 23, and the metal belt 2
4 is the pulley around which it is wound.

The metal belt 24 and pulleys 23, 2 mentioned above
6. A gear 19 having a helical gear 21, a helical gear 20, a gear 17, a slider 15, and a stepping motor 16 move the carriage 4 along the platen 2, that is, in the left-right direction in FIG. 1a. It constitutes a carriage drive means.

A gear 27 engages with the gear 18 and has a small diameter gear 28 on the side thereof, and is loosely fitted to the paper feed shaft 29 so as to be rotatable. A gear 30 engages with the gear 28, and has a small diameter gear 31 on the side. A gear 32 engages with the gear 31, and is rotatably mounted integrally with the paper feed shaft 29. Note 3
A sprocket 3 is provided integrally with the paper feed shaft 29, and has protrusions 34 on its circumferential surface that are fitted into holes formed at both edges of the recording paper, for example.

The above-mentioned sprocket 33, paper feed shaft 29, gear 32, gear 30 having gear 31, gear 27 having gear 28, gear 18, slider 15, and stepping motor 16 move the recording paper wound around the platen 2. It constitutes the paper feeding mechanism.

3 is a plan view showing the inside of the tape cassette described above, FIG. 4 is a plan view showing a cassette holding plate taken as an example of cassette holding means for holding the tape cassette, and FIG. FIG. 6 is a developed view showing the engagement relationship between the above-mentioned cartridge and the cassette holding plate; FIG. 7 is a front view of the carriage portion; FIG. 8 is a rear view of the cartridge portion; Figure 9 is a side view of the carriage part, Figure 10 is a back view of the carriage part, and Figure 1 is a side view of the carriage part.
1 is an enlarged sectional view taken along the line BB in FIG. 6, and FIG. 12 is a front view showing a portion of the printing tape.

Next, based on these FIGS. 3 to 12 and the above-mentioned FIGS. 1a and 1b, we will explain the printing tape winding mechanism, carriage mounting structure, and carriage guide means provided in this embodiment. state

In FIG. 3, reference numeral 35 denotes a lower case of the tape cassette 6, and the tape cassette 6 is composed of the lower case 35 and an upper case (not shown) attached to the lower case 35. Note that 36 is a cavity into which the thermal head 5 is inserted. 3
Reference numeral 7 denotes a printing tape containing a heat-fusible material, which is housed inside the tape cassette 6, and as shown in FIG. Print areas of different colors, such as area 40, are set, and each print area 38, 39, 40 has a width dimension that allows printing, for example, one character. That is, three characters can be printed in the width direction of the printing tape 37.

Further, in FIG. 3, reference numerals 41 and 42 indicate a pair of cores around which the printing tape 37 is wound, which are rotatably arranged within the tape cassette 6, and have cross-shaped holes 43 and 44 formed in the center. ing.

4 and 5, reference numeral 45 denotes a cassette holding plate rotatably mounted on the carriage 4;
6 and 47 have a cross-shaped outer shape that engages with the holes 43 and 44 of the cores 41 and 42, respectively.
This is a pair of bobbins. As shown in FIG. 5, the bobbin 46 is placed on the cassette holding plate 45 via a hollow shaft 48. Although not particularly shown, the bobbin 4
7 is also arranged on the cassette holding plate 45 via a hollow shaft similar to the hollow shaft 48. Further, the above-mentioned cassette holding plate 45 is provided with bearings 49 and 50 at the ends thereof, and as shown in FIG. A pin (not shown) is placed in the bearing 49,
50 and the hole in the carriage 4, the cassette holding plate 45 is attached to the carriage 4. In FIG. 6, the back side of the cassette holding plate 45 is shown.

Figure 1a and Figure 1 showing the underside of the carriage 4.
Reference numeral 53 in FIG.
Reference numeral 4 designates a transmission gear that is engageable with this rack gear 53. Reference numeral 55 denotes a movable body attached to the carriage 4, with through holes 56 provided in the carriage 4 on both sides,
It has protrusions 58 and 59 disposed within 57, and is movable in a direction perpendicular to the direction of movement of the carriage 4, as shown by an arrow 60. Note that as shown in FIG.
The upper part of 9 is a wire spring 6 attached to the carriage 4.
Therefore, the moving body 55 is urged in the direction toward the platen 2 by this wire spring 61. Further, the support shaft 62 of the transmission gear 54 described above
As shown in FIG. 10, the transmission gear 54 is loosely fitted into an elongated hole 63 formed at the bottom of the movable body 55, so that the transmission gear 54 moves integrally with the movable body 55 in the direction of arrow 60, and It is movable within the hole 63, that is, movable parallel to the moving direction of the carriage 4.

Further, 64 and 65 shown in FIG. 10 are a pair of tape winding gears which are rotatably mounted on the carriage 4 and selectively engaged with the transmission gear 54, and 66 and 67 shown in FIG. 6 are these tape winding gears. They are a pair of first pin gears that rotate integrally with the take gears 64 and 65, respectively. As shown in FIG. 11, the first pin gear 66 and the tape take-up gear 64 have a hollow part 68 formed in the center of the first pin gear 66 and a shaft part 69 formed in the center of the tape take-up gear 64. It is integrated by fitting. Further, although not particularly shown, another set of the first pin gear 67 and the tape winding gear 65 are also integrated in the same manner as described above.

Further, 70 and 71 shown in FIG. 6 engage with the first pin gears 66 and 67, respectively, and hold the cassette holding plate 4.
a pair of second pin gears, 72, 7 attached to 5;
Reference numeral 3 designates a pair of clutch mechanisms interposed between the second pin gears 70, 71 and the bobbins 46, 47 shown in FIG. 4 mentioned above. Furthermore, the clutch mechanism 7
2, as shown in FIG. 5, a protrusion 76 formed by a shaft portion 74 and a disc-shaped flat plate portion 75, and a friction plate 77 formed on the flat plate portion 75 of this protrusion 76.
The shaft portion 74 of the protrusion 76 is the second
The hole 78 formed in the center of the pin gear 70, the hole 79 formed in the cassette holding plate 45, the coil spring 81 disposed in the hole 80 of the hollow shaft 48, and the hole 82 of the bobbin 46, The second pin gear 70 and the bobbin 46 are integrally rotatably mounted on the cassette holding plate 45. The friction plate 77 of the protrusion 76 and the lower surface 8 of the second pin gear 70
3 come into contact with each other, and when a rotational force exceeding a predetermined magnitude is applied to the second pin gear 70, only the second pin gear 70 rotates, and the protrusion 7
6 and bobbin 46 are designed not to rotate. Although not particularly shown, other clutch mechanisms 7
3 is also engaged with the second pin gear 71, bobbin 47, etc. in the same manner as above.

In this embodiment, the above-mentioned rack gear 53, transmission gear 54, moving body 55, wire spring 61,
A pair of tape winding gears 64, 65, a pair of first pin gears 66, 67, and a second pin gear 70, 7
1. The clutch mechanisms 72, 73, etc. constitute a winding mechanism for the printing tape 37.

Further, as shown in FIGS. 1a and 9, the frame 1 has a first edge 84 extending in the direction along the platen 2 and disposed near the platen 2.
and a second
An edge 85 and a step 86 extending in the direction along the platen 2 are formed. A pin 87 that engages with the first edge 84 is attached to a portion of the carriage 4 located on the side of the platen 2, and a portion of the carriage 4 located on the side away from the platen 2 is fitted with a pin 87 that engages with the first edge 84.
A protrusion 88 that engages with the second edge 85 is formed in the lower portion of the carriage 4, and an engaging portion 89 that engages with the step portion 86 described above is formed in the lower portion of the carriage 4.

The first edge 84, the second edge 85, the pin 87, and the protrusion 88 described above constitute a carriage attachment structure for movably attaching the carriage 4 to the frame 1.

Further, the step portion 86 and the engaging portion 89 described above constitute a carriage guide means for moving the carriage 4 along the platen 2.

FIG. 13 is an exploded view showing the mounting structure of the above-mentioned rack gear 53. As shown in FIG. 13, a plurality of holes 90 are formed on the back surface of the rack gear 53, and a plurality of protrusions or cut-out portions 91 are formed on the frame 1 corresponding to the holes 90 of the rack gear 53.
is formed. The rack gear 53 is attached to the frame 1 by fitting each of the cut and raised portions 91 into each of the holes 90.

Next, based on the above-mentioned FIGS. 6 to 10 and FIGS. 15, 16, 17, and 18, a shift mechanism for the tape cassette 6 provided in this embodiment,
The winding stop mechanism for the printing tape 37, the pressure release mechanism for the thermal head 5, and the mounting structure for the thermal head 5 will be described.

In FIG. 6, 92 is a gear attached to the shaft 7 passing through the carriage 4 and rotates integrally with this shaft 7, 93 is a gear that engages with this gear 92, 94 is a release cam, 95 is a pressure contact cam, 96
14 is a tape shift cam, of which a gear 93, a release cam 94, and a pressure contact cam 95 are integrally formed as shown in the side view of FIG. 14a and the front view of FIG. 14b. is formed separately from the gear 93 and the like, as shown in the side view of FIG. 15a and the front view of FIG. 15b. As shown in FIG. 6, a shaft 97 having an oval cross section allows
These gears 93, release cam 94, pressure contact cam 95
The tape shift cam 96 and the tape shift cam 96 are mounted on the carriage 4 so as to be integrally rotatable.
The characteristics of the pressure contact cam 95 are set as shown in 1 in FIG. 14c, the characteristics of the release cam 94 are set as shown in 2 in FIG. 14c, and the characteristics of the tape shift cam 96 are set as shown in FIG. For example, Figure 15c
The settings are as shown below. Note that the tape shift cam 96 is formed with a groove 99 into which the tip of a pin 98 attached to the holding plate 45 is inserted. In FIG. 6, the carriage 4 and the cassette holding plate 45 are shown separated, and the back side of the cassette holding plate 45 is shown. The pin 98 is inserted and the bearing 4 of the cassette holding plate 45
The cassette holding plate 45 is attached to the carriage 4 by fitting the holes 51 and 52 in the carriage 4, and the tape cassette 6 is mounted on the cassette holding plate 45. Therefore, the gear 93 rotates as the gear 92 rotates as the shaft 7 rotates, and the tape shift cam 96 rotates integrally with the gear 93, thereby causing the pin 98 to move as will be described later. The tape cassette 6 rises from the lower position to the middle position and then to the upper position, and accordingly, the cassette holding plate 45 rotates around the bearings 49 and 50, and the height position of the tape cassette 6 changes. That is, the gear 9 described above
2, 93, the tape shift cam 96, the pin 98, and the cassette holding plate 45 constitute a cassette shift mechanism for arranging the tape cassette 6 at a plurality of height positions, for example, three height positions.

Further, the release cam 94 is engaged with a protrusion 100 formed on the portion of the movable body 55 located on the platen 2 side shown in FIG. 10 described above. As the release cam 94 rotates, the moving body 55 moves in a direction away from the platen 2 against the force of the wire spring 61 shown in FIG. The engagement with the rack gear 53 is released. That is, the gears 92 and 93, the release cam 94, the movable body 55, and the wire spring 61 disengage the transmission gear 54 and the rack gear 53, and the printing tape 37 stops the winding operation of the printing tape 37. A winding stop mechanism is constructed.

Further, the pressure contact cam 95 is engaged with a lever 101 rotatably mounted on the platen 2 side of the carriage 4, as shown in FIGS. 10 and 6.
The lever 101 is shown in the front view in FIG. 17a and in FIG. 17b.
As shown in the side view of FIG. 17C and the plan view of FIG.
4, a rising portion 105 connected to the bottom portion 104 and arranged on the platen 2 side, a bearing 105a,
105b. Further, 106 shown in FIG. 10 is a member attached to the lever 101, and the first
As shown in the front view of FIG. 8a, the side view of FIG. 18b, and the plan view of FIG. 18c, the bottom 1 of the lever 101
04 and the lever 1.
Two rising portions 108 and 109 are brought into contact with the vicinity of both ends of the lower portion of the rising portion 105 of the lever 101 and are fixed to the rising portion 105 with screws, for example, and near the center of the lower portion of the rising portion 105 of the lever 101. An elastic rising portion 11 disposed in front of the
It consists of 0. Further, 111 shown in FIG. 6 is a head base on which the thermal head 5 is mounted.
As shown in the front view of FIG. 16a and the plan view of FIG. It consists of a base portion 114 which is held between a rising portion 110 of the member 106 and a rising portion 105 of the lever 101. These levers 101 and members 10
6. The assembled state of the head base 111 is shown in FIGS. 7, 8, and 9 mentioned above. Note that 115 and 116 shown in FIGS. 6 and 10 refer to the lever 10.
1 bearings 105a, 105b and carriage 4
pins 117 and 11 shown in FIGS. 6 and 7 that are inserted into holes provided in the
8 is held on each of pins 115 and 116,
One end is attached to the carriage 4, and the other end is attached to the lever 1.
This is a spring that is engaged with the lower part of the rising portion 105 of 01.

The lever 101 and member 106 described above constitute a clamping body that clamps the head base 111, and the springs 117 and 118 described above bias the clamping body so as to rotate the clamping body in the direction in which the head base 111 approaches the platen 2. It constitutes an elastic body. In addition, the above head base 111 and lever 1
01 and member 106, and spring 1
17,118 and pins 115,1
16 constitutes a mounting structure for the thermal head 5.

As the pressure contact cam 95 rotates, as will be described later, the rising portion 105 of the lever 101, the central rising portion 113 of the head base 111, and the thermal head 5 are brought into an upright state as shown in FIG. The lever 101 is kept in pressure contact with the platen 2, or the lever 101 is rotated as shown by the arrow 119, and the head base 111 and the thermal head 5 are integrally moved in the direction shown by the arrow 119.
The platen 2 of the thermal head 5 rotates in 9 directions.
Pressure against is released.

The gears 92, 93, the pressure cam 95, the lever 101, the member 106, the head base 111, etc. constitute a head pressure release mechanism that presses the thermal head 5 against the platen 2 and releases the pressure contact.

Note that the rotation of the stepping motor 11 is controlled by the gear 9.
The shaft 7 transmits the rotation of the stepping motor 11 as the rotation of the thermal head 5 to the head pressure release mechanism as the pressure release mechanism of the thermal head 5.
power transmission member, and stepping motor 11
a second power transmission member that transmits the rotation of the print tape 37 to a tape winding stop mechanism as a winding stop operation of the printing tape 37;
It also serves as a third power transmission member that transmits the rotation of the stepping motor 11 as a shift operation of the tape cassette 6 to the cassette shift mechanism.

Next, the operation of one embodiment configured as described above will be described.

Introduction: (1) Carriage drive operation (2) Paper feeding operation (3) Printing tape winding operation (4) Printing tape winding stop operation (5) Tape cassette shift operation (6) Pressure contact and release of the thermal head Each operation will be explained individually, and then a series of the above operations performed in one basic printing operation will be described.

(1) Carriage Driving Operation With the rotation of the stepping motor 11 shown in FIG. 1, the worm 10 rotates.
The rotation of 0 rotates the worm wheel 9,
The cam 8 rotates in unison with the rotation of the worm wheel 9.
Then, this cam 8 rotates as shown in Fig. 2c.
When the characteristic ranges indicated by 45°-60°, 135°-150°, and 225°-330° are reached, the lever 13 rotates counterclockwise about the support shaft 14 in Fig. 1a. Accordingly, the slider 15 engaged with the lever 13 moves leftward in Fig. 1a, and the gear formed on the left side of the slider 15 engages with the gear 17. When the stepping motor 16 rotates, the slider 15 rotates, and the gear 17 rotates with the rotation of the slider 15, and the gear 19, i.e., the helical gear 20, rotates with the rotation of the helical gear 20.
1, that is, the pulley 23 rotates. When the pulley 23 rotates, the metal belt 24 moves.
1a, that is, along the platen 2. As a result, the carriage 4 moves in the left-right direction of FIG.

(2) Paper feeding operation When the stepping motor 11 shown in FIG. 1 rotates, the cam 8 rotates via the worm 10 and the worm wheel 9 as described above. Then, this cam 8 moves from 0° to 15°, 90° to 105°, and 180° to 180° as shown in Figure 2c.
When the characteristic range indicated by 195° is reached, the lever 13 rotates clockwise about the support shaft 14 from the state shown in FIG. 1a, that is, the state in the carriage drive operation described above. Therefore, the slider 15 engaged with the lever 13 moves to the right in FIG. 1, and the gear formed on the right side of the slider 15 engages with the gear 18. When the stepping motor 16 rotates, the slider 15
rotates, gear 27, gear 28 rotates as the slider 15 rotates, gear 30, gear 31 rotates as gear 28 rotates, and gear 32 rotates as gear 31 rotates. Rotate. When the gear 32 rotates, the paper feed shaft 29 rotates, and as the paper feed shaft 29 rotates, the sprocket 33 rotates, thereby moving the recording paper wound around the platen 2 by a predetermined amount, for example, one line. It is sent in a direction perpendicular to the direction of movement of the carriage 4.

(3) Winding operation of the printing tape As the stepping motor 11 shown in FIG. 1 rotates, the worm 10 rotates. When the shaft 7 rotates, the shaft 7 passing through the carriage 4 rotates. When the shaft 7 rotates, the gear 92 rotates, and as the gear 92 rotates, the gear 93 rotates,
A release cam 94 rotates integrally with this gear 93. Then, the release cam 94 shown in FIG.
In the characteristic range shown from 90° to 345°, the release cam 94 and the protrusion 1 of the movable body 55 shown in FIG.
00, the protruding portion 100 engages with the small diameter portion 120 of the release cam 94 as shown in FIG. 19a by the biasing force of the wire spring 61 shown in FIG. Therefore, the movable body 55 is located on the side approaching the platen 2, and the transmission gear 54 engages with the rack gear 53. In this state, when the carriage 4 moves, for example, to the right in FIG. 1a, the rack gear 5
3, the support shaft 62 of the transmission gear 54 is relatively moved within the elongated hole 63 of the movable body 55 to the left in FIG. 1a, that is, to the state shown in FIG. The transmission gear 54 engages with the tape winding gear 65, and as the carriage 4 moves, the transmission gear 5
4, and the first pin gear 67 shown in FIG. 6 rotates clockwise as the tape winding gear 65 rotates. As the first pin gear 67 rotates, the second pin gear 71 rotates counterclockwise, and as the second pin gear 71 rotates, the bobbin 47 shown in FIG.
rotates counterclockwise in Fig. 4, and this bobbin 4
The core 42 shown in FIG. 3 that engages 7 rotates counterclockwise. As a result, the printing tape 37 is wound up in the direction of arrow 121 in FIG.

Further, as mentioned above, the transmission gear 54 is connected to the rack gear 5.
3 and when the carriage 4 moves to the left in FIG. That is, the carriage 4 moves relatively to the left in FIG. 10, the transmission gear 54 engages with the tape take-up gear 64, and as the carriage 4 moves, the tape take-up gear 64 rotates via the transmission gear 54. As the tape winding gear rotates, the first pin gear 66 shown in FIG. 6 rotates counterclockwise. This first
As the pin gear 66 rotates, the second pin gear 70 rotates clockwise.
0, the bobbin 46 shown in FIG. 4 rotates clockwise in FIG. 4, and the core 41 shown in FIG. 3, which is engaged with this bobbin 46, rotates clockwise. As a result, the printing tape 37 is wound in the direction of arrow 122 in FIG.

That is, the right direction of the carriage 4 in FIG.
The printing tape 3 shown in FIG. 3 as it moves to the left.
7 is fed out in the direction of arrow 121 or in the direction of arrow 122 by an amount corresponding to the distance traveled by the carriage 4, and is wound up.

(4) Print tape winding stop operation When the stepping motor 11 shown in FIG. move. And release cam 94
When the release cam 94 and the protrusion 100 of the movable body 55 shown in FIG. As clearly shown in FIG. 54
is separated from the rack gear 53, and the engagement with the rack gear 53 is released. This allows the carriage 4
Even if the tape winding gears 64 and 65 move, neither of the tape winding gears 64 and 65 rotates, and therefore the first pin gears 66 and 6
7. Second pin gear 70, 71, bobbin 46, 4
7. Neither of the cores 41 and 42 rotates, and the printing tape 37 shown in FIG. 3 is maintained in a non-winding state.

(5) Shifting operation of tape cassette As shown in Figure 20a, the cassette holding plate 45
is attached to the carriage 4, the pin 98 is inserted into the groove 99 of the tape shift cam 96, and the tape cassette 6 is attached to the cassette holding plate 45. When the stepping motor 11 shown in FIG. 10, the shaft 7 rotates via the worm wheel 9, and the gears 92, 93
The tape shift cam 96 rotates via.

15c of the tape shift cam 96.
When the pin 98 is located in the characteristic range shown from 0° to 75°, the pin 98 is at the position 124 of the groove 99 in FIG. 15b, that is, in the state shown in FIG. The cassette holding plate 45 and the tape cassette 6 are arranged at the lower position as shown. At this time, the red printing area 38 of the printing tape 37 stored in the tape cassette 6 located in the upper part of FIG. 12 is facing the thermal head 5. It is now possible to print in red using

Also, the tape shift cam 96 shown in FIG.
Pin 9 in the characteristic range shown from 112.5° to 165°
8, the pin 98 is at the position 125 of the groove 99 in FIG.
It is in the state shown in FIG. b, and as a result, the cassette holding plate 45 and tape cassette 6 are placed in the middle position shown. At this time, the printing tape 37 of the tape cassette 6 has a yellow printing area 39 located in the middle of FIG. 12 facing the thermal head 5.
Therefore, yellow printing using this yellow printing area 39 is now possible.

Also, the tape shift cam 96 shown in FIG.
Pin 9 in the characteristic range shown from 202.5° to 255°
8, the pin 98 is at the position 126 of the groove 99 in FIG.
It is in the state shown in FIG. c, whereby the cassette holding plate 45 and tape cassette 6 are placed in the upper position shown. At this time, the printing tape 37 in the tape cassette 6 has a blue printing area 40 located at the bottom of FIG. 12 facing the thermal head 5, so that blue printing using this blue printing area 40 is possible. It's summery.

(6) Pressure contact and release operation of the thermal head When the stepping motor 11 shown in FIG. rotates. And the pressure contact cam 95 is 37.5° to 67.5°, 217.5° to 1 in Fig. 14c.
In the characteristic range shown by 247.5° and 307.5° to 337.5°, the engagement portion 10 of the pressure contact cam 95 and the lever 101
2 are engaged, the engaging portion 102 is shown in FIG. 21a.
As shown in FIG.
that is, the lever 101 is engaged with the spring 117,
Due to the force of 118, the lever 1 rotates around the pins 115 and 116 in the direction approaching the platen 2.
The head base 111 and the thermal head 5 rotate integrally with the printer 01, and the thermal head 5 presses the printing tape 37 and the recording paper 129 against the platen 2. In this state, when the thermal head 5 is energized, the heat-fusible material of the printing tape 37 is melted and transferred onto the recording paper 129, and printing is performed.

Further, when the pressure contact cam 95 is rotated, the pressure contact cam 95 and the lever 101 are rotated within the characteristic ranges shown in 1 of 0° to 15° to 90° to 195° and 270° to 285° in FIG. 14c. When the engaging portion 102 is engaged with the large diameter portion 128 of the pressure contact cam 95, as shown in FIG. against pin 1
15, 116 from the state shown in FIG. The thermal head 5 is then released from pressure contact with the platen 2.

Next, a series of operations performed in one basic printing operation will be described.

In addition, in this embodiment, the printing tape 3
The feed amount 7 corresponds to the amount of one-way movement of the carriage 4, and it is possible to print in three stages in the width direction of the printing tape 37. For example, the basic printing operations are listed below. The operations are performed sequentially.

Carrying out paper feeding [The carriage 4 is stopped, the tape cassette 6 is held in the lower position, the printing tape 37 is kept in a windable state, the thermal head 5 is kept in a pressure-released state, and paper feeding is carried out. That is, first of all, the cartridge 4 to which the tape cassette 6 is attached is placed at a predetermined printing start position at the left end in FIG. 1a. When the stepping motor 11 is driven in this state, the cam 8 rotates via the worm 10 and the worm wheel 9. While this cam 8 rotates within the characteristic range of 0° to 15° shown in Fig. 2c, that is, while it rotates within the range of 15° in the direction of the arrow in Fig.
The slider 15 engages with the gear 18 via the lever 13. In this state, when the stepping motor 16 is driven, the slider 15 rotates, and the gears 18, 27, 28, 30, 31, 3
2 rotates, the paper feed shaft 29 and sprocket 33 rotate, and the recording paper (not shown) moves along the arrow 1 in FIG.
For example, one line is sent in the 30 directions.

As mentioned above, while the cam 8 rotates within a range of 15 degrees in the direction of the arrow in FIG. Release cam 94 and pressure contact cam 95 via 93
rotates in the direction of arrow 131 in FIG. 14b, and the tape shift cam 96 rotates in the direction of arrow 132 in FIG. 15b. Therefore, the small diameter portion of the release cam 94 shown in FIG. 14b, located at the lower left portion in the drawing, engages with the protrusion 100 of the movable body 55 shown in FIG. As shown in FIG. 3, the rack gear 53 and the transmission gear 54 are engaged, and the printing tape 37 is set in a windable state. Note that in the state before the cam 8 rotates, the protrusion 100 is in the position shown at 90° in FIG.
4, that is, the 90° position of the release cam 94 in FIG. 14b corresponds to the 0° position of the cam 8.

Further, the lower part of the pressure contact cam 95 shown in FIG. be done. Note that before the cam 8 rotates, the upper end of the engaging portion 102 of the lever 101 engages with the pressure contact cam 95 at the position shown at 180° in FIG. The 180° position of the pressure contact cam 95 in b corresponds to the 0° position of the cam 8. Although the rotational state of the pressure contact cam 95 is different, this pressure release state is shown in FIG. 21b. Also, a pin 98 attached to the cassette holding plate 45 is located at the position 124 of the tape shift cam 96 shown in FIG. 15b.
As a result, the tape cassette 6 on the cassette holding plate 45 is placed in the lower position as shown in FIG. It's getting old. Although FIG. 20a depicts the head in a press-contact state, in reality, at this time, the press-contact state is still maintained as described above. Further, the state before the cam 8 rotates, that is, the 0° position in FIG. 2b corresponds to the 0° position of the tape shift cam 96 shown in FIG. 15b.

Moving the carriage to the right, printing in red [The tape cassette 6 is held in the lower position, the printing tape 37 is kept ready for winding, the thermal head 5 is kept in pressure contact, and the carriage 4 is moved to the right in Figure 1a. Move the printing tape 3 in Figure 12.
A red printing operation is performed using the upper red printing area 38 of 7. ] In other words, the stepping motor 11 is further driven from the above state, and the cam 8 is thereby driven.
When the lever 13 rotates within the range of 45° to 60° in the direction of the arrow in FIG. In this state, when the stepping motor 16 is driven, the slider 15 rotates, and the gear 19, helical gear 20,
21, the pulley 23 rotates, the metal belt 24 moves, and the carriage 4 moves to the right in FIG. 1a, that is, from the left end to the right end of the frame 1.

As mentioned above, while the cam 8 rotates within a range of 60 degrees in the direction of the arrow in FIG.
The pressure contact cam 95 moves in the direction of arrow 131 in FIG. 14b, and the tape shift cam 96 moves in the direction of arrow 1 in FIG. 15b.
Further rotation in 32 directions. Therefore, the small diameter portion 120 of the release cam 94 and the movable body 5 shown in FIG.
The protruding portion 100 of No. 5 continues to be held in the engaged state,
As the carriage 4 moves, the transmission gear 54 engages with the tape winding gear 65, and the rotation of the transmission gear 54 causes the tape winding gear 65, the first pin gear 67, and the second pin gear 67 to rotate.
The printing tape 37 in the tape cassette 6 is thereby wound in the direction of the arrow 121 in FIG. 3. Further, the small diameter portion 127 of the pressure welding cam 95 at the lower right side in the drawing shown in FIG. 14b engages with the engaging portion 102 of the lever 101 as shown in FIG. 5 is brought into pressure contact with the platen 2. Moreover, the pin 98 of the cassette holding plate 45 is shown in FIG. 15b.
The tape shift cam 96 continues to be held at the position 124 shown in FIG. 2, and the tape cassette 6 is maintained at the lower position.

That is, while the cam 8 rotates within a range of 60 degrees in the direction of the arrow in FIG.
The printing tape 37 is kept at the lower stage as shown in FIG. It is wound up in the 121 direction. Therefore, when the thermal head 5 is energized to a predetermined value when the carriage 4 starts moving, red printing can be performed using the red printing area 38 located at the upper stage of the printing tape 37 shown in FIG. 12.

Carrying out paper feeding [The carriage 4 stops, the tape cassette 6 is shifted from the lower position to the middle position, the printing tape 37 is kept ready for winding, and the thermal head 5
is maintained in the pressure-released state and paper feeding is carried out. However, it goes without saying that there is no need to feed the paper if another color is to be printed on the same line as the line on which the above-mentioned red printing has been performed. ] In other words, the stepping motor 11 is further driven from the above state, and the cam 8 is thereby driven.
When the slider 15 rotates within the range of 90° to 105° in the direction of the arrow in FIG.
It is sent one line in the direction of arrow 130 in figure a. During this time, the shaft 7 also rotates up to 105 degrees together with the cam 8, the release cam 94 and the pressure contact cam 95 further rotate in the direction of the arrow 131 in FIG. 14b, and the tape shift cam 96 rotates in the direction of the arrow 131 in FIG. 15b. It further rotates in the 132 direction. Therefore, the small diameter portion 120 of the release cam 94 and the protruding portion 100 of the movable body 55 shown in FIG. 14b
The lock gear 53 and the transmission gear 54 are maintained in an engaged state. Further, the large diameter portion 128 of the pressure contact cam 95 on the right side of the drawing in FIG. . Further, the pin 98 of the cassette holding plate 45 is in the process of relatively moving within the groove 99 of the tape shift cam 96 from the position 124 to the position 125, whereby the cassette holding plate 45 and the tape cassette 6 are moved from the position shown in FIG. From the state shown in , it rotates counterclockwise around the bearings 49 and 50,
The yellow printing area 39 located in the middle of the printing tape 37 shown in FIG. 12 is in a state facing the thermal head 5.

Carriage moved to the left, yellow printing [The tape cassette 6 is held in the middle position, the printing tape 37 is kept ready for winding, the thermal head 5 is kept in pressure contact, and the carriage 4 is moved to the left in Fig. 1a. Move the printing tape 3 in Figure 12.
A yellow printing operation is performed using the middle yellow printing area 39 of 7. ] That is, when the stepping motor 11 is further driven from the above state, and thereby the cam 8 is rotated within the range of 135° to 150° in the direction of the arrow in FIG. engages the gear 17, and the carriage 4 moves from the right end to the left end of the frame 1 in FIG. 1a in the same manner as described above. During this time, the shaft 7 also rotates up to 150 degrees together with the cam 8, and the release cam 94 and the pressure contact cam 95
further rotates in the direction of arrow 131 in FIG. 14b,
The tape shift cam 96 is located at the arrow 132 in FIG. 15b.
Rotate further in the direction. Therefore, the small diameter portion 120 of the release cam 94 shown in FIG. 14b and the protruding portion 100 of the movable body 55 continue to be held in an engaged state, and as the carriage 4 moves to the left in FIG. The gear 54 and the tape winding gear 64 are engaged, and the rotation of the transmission gear 54 is transmitted to the core 41 shown in FIG. As a result, the printing tape 37 is wound in the direction of arrow 122 in FIG. That is, the printing tape 37 is wound in the same amount and in the opposite direction to the tape winding amount when the cam 8 is rotated in the range of 45 DEG to 60 DEG in the direction of the arrow in FIG. 2B. Also, the pressure welding cam 95
In this case, the small diameter portion 127 at the upper right side of FIG. 14B engages with the engaging portion 102 of the lever 101, so that the thermal head 5 is maintained in a pressed state. Also,
Pin 98 of cassette holding plate 45 continues to be held at position 125 of tape shift cam 96, and tape cassette 6 is maintained in the middle position of FIG. 20b.

That is, while the cam 8 rotates within a range of 150 degrees in the direction of the arrow in FIG.
The thermal head 5 is kept in the middle position shown in Figure b.
are kept in a pressed state, and the carriage 4 moves from the right end of the frame 1 in FIG. 1a to the left end,
Printing tape 37 is wound in the direction of arrow 122 in FIG. Therefore, if a predetermined current is applied to the thermal head 5 during this time, yellow printing can be performed using the yellow printing area 39 located in the middle of the printing tape 37 shown in FIG.

Carrying out paper feeding [The carriage 4 stops, the tape cassette 6 is shifted from the middle position to the upper position, the printing tape is kept ready for winding, the thermal head 5 is kept in the pressure release state, and paper feeding is carried out. be done. However, it goes without saying that there is no need to feed the paper if blue is to be printed on the same line as the yellow-printed line described above. ] In other words, the stepping motor 11 is further driven from the above state, and the cam 8 is thereby driven.
When the slider 15 rotates within the range of 180° to 195° in the direction of the arrow in FIG. One line is sent in the 130 direction. During this time,
The shaft 7 also rotates up to 195 degrees together with the cam 8, and the release cam 94 and the pressure contact cam 95 move in the direction of arrow 1 in Fig. 14b.
31 direction, and the tape shift cam 96 moves to the first
It further rotates in the direction of arrow 132 in Figure 5b. Therefore, the small diameter portion 120 of the release cam 94 and the protruding portion 100 of the movable body 55 shown in FIG.
remains engaged. Also, the pressure welding cam 95
The large diameter portion 128 in the upper portion of FIG. 14B engages with the engaging portion 102 of the lever 101, and is therefore maintained in a pressure-released state that allows feeding of the recording paper. The pin 98 of the cassette holding plate 45 moves within the groove 99 of the tape shift cam 96 from position 125 to position 126.
As a result, the cassette holding plate 45 and the tape cassette 6 are in the process of moving relative to the second
From the state shown in FIG. 0b, it rotates counterclockwise around the bearings 49 and 50, and the blue printing area 40 located at the lower stage of the printing tape 37 as shown in FIG. 12 faces the thermal head.

Moving the carriage to the right, blue printing [The tape cassette 6 is held in the upper position, the printing tape 37 is kept ready for winding, the thermal head 5 is kept in pressure contact, and the carriage 4 is moved to the right in Fig. 1a. Then, a blue printing operation is performed using the lower blue printing area 40 of the printing tape 37 shown in FIG. ] In other words, the stepping motor 11 is further driven from the above state, and the cam 8 is thereby driven.
When the slider 15 rotates within the range of 225° to 330° in the direction of the arrow in FIG. The frame 1 moves rightward from the left end to the right end, then reverses, and moves leftward from the right end to the left end. Then, while the carriage 4 moves to the right as described above, that is, while the cam 8 rotates within the range of 225° to 255° in the direction of the arrow in FIG. The portion 120 and the protruding portion 100 of the movable body 55 continue to be held in an engaged state, and as the carriage 4 moves rightward, the transmission gear 54 engages with the tape winding gear 65, and the rotation of the transmission gear 54 Tape winding gear 6
5, first pin gear 67, second pin gear 71,
The printing tape 37 of the tape cassette 6 is transferred to the core 42 via the bobbin 47, thereby causing the printing tape 37 of the tape cassette 6 to be transferred to the third
It is wound up in the direction of arrow 121 in the figure. Further, the small diameter portion 1 at the upper left side of the pressure contact cam 95 shown in FIG. 14b
27 and the engaging portion 102 of the lever 101 engage,
As a result, the thermal head 5 is brought into pressure contact. Further, the pin 98 of the cassette holding plate 45 is located at the position 12 of the tape shift cam 96 shown in FIG. 15b.
6, and the tape cassette 6 is maintained at the upper position in FIG. 20c.

In other words, the cam 8 is rotated by 225 degrees in the direction of the arrow in Fig. 2b.
Carriage 4, which rotates up to 330°, is shown in Figure 1a.
While the tape cassette 6 moves to the right, that is, while the cam 8 rotates within the range of 225° to 255° in the direction of the arrow in FIG. 2b, the tape cassette 6 is maintained at the upper position shown in FIG. 20c, The thermal head 5 is kept pressed, and the printing tape 37 is moved in the direction of arrow 121 in FIG.
It is wound in the direction. Therefore, if a predetermined current is applied to the thermal head 5 during this time, blue printing can be performed using the blue printing area 40 located at the lower stage of the printing tape 37 shown in FIG. When this printing is completed, the red printing area 38 located in the upper row of the printing tape 37, the yellow printing region 39 located in the middle row, and the blue printing region 40 located in the lower row are all covered by a feed amount corresponding to one-way movement of the carriage 4. It becomes used.

Carriage moves to the left and printing stops [The tape cassette 6 is shifted from the upper position to the lower position, the printing tape 37 is kept in the winding stopped state, the thermal head 5 is kept in the pressure release state, and the carriage 4 is moved to the first position. Move to the left in figure a.
During this time, printing will not be performed. ] Furthermore, while the cam 8 rotates within the range of 225° to 330° in the direction of the arrow in FIG. After the movement is completed, the large diameter portion 12 of the release cam 94 shown in FIG.
3 and the protrusion 100 of the movable body 55 are brought into engagement as shown in FIG. It is maintained. Also, the first
The large diameter portion 128 at the lower left side of the pressure contact cam 95 shown in FIG. Also, pin 9 of the cassette holding plate 45
8 is in the process of relatively moving within the groove 99 of the tape shift cam 96 from position 126 to position 124 as shown in FIG. From this state, it rotates clockwise in the drawing around the bearings 49, 50, and then returns to the initial state shown in FIG. 20a.

In other words, the cam 8 is rotated by 225 degrees in the direction of the arrow in Fig. 2b.
While the cartridge 4 rotates from 255° to 330° of the 330° range and moves to the left in FIG. 1a, the tape cassette 6 moves from the upper position shown in FIG. lowered to the lower position shown in Figure a,
The thermal head 5 is maintained in a state where the pressure contact is released, and the printing tape 37 is maintained in a state where winding is stopped.
Therefore, no printing operation is performed during this time.

Thereafter, the operations described above are repeated depending on the amount of printing.

FIG. 22 shows the rotation of the cam 8 and the release cam 9 mentioned above.
4 is a timing chart showing the relationship between the rotations of the pressure contact cam 95 and the tape shift cam 96.

In one embodiment configured in this way,
Since a cassette shift mechanism, a head pressure release mechanism, and a tape winding stop mechanism are provided, which operate in conjunction with the rotation of the shaft 7, the carriage 4 moves between two reciprocating movements on the frame 1, that is, 4 degrees of movement. During the occasion, within the range of the feed amount of the printing tape 37 corresponding to the one-way movement distance of the carriage 4, the upper, middle,
Printing in each of the lower three printing areas 38, 39, and 40, that is, printing in three colors, is possible. Also,
Printing can be performed in three of the four movement opportunities of the carriage 4, and the ratio of the total time required for printing work to the predetermined total recording amount on the recording paper, that is, the printing speed, can be reduced compared to the conventional one. The printing speed can be increased by 1.5 times compared to the previous version, improving printing work efficiency.

Further, in this embodiment, the printing tape 37
The winding mechanism is connected to a pair of first pin gears 6, respectively.
6, 67, second pin gear 70, 71, bobbin 4
6, 47, cores 41, 42, clutch mechanism 72,
73, when the carriage 4 moves rightward and leftward on the frame 1 shown in FIG. The printing tape 37 can be fed in the direction in which it is wound around the core 42 or in the direction in which it is wound around the core 42, and the reverse feeding operation of the printing tape 37 can be realized satisfactorily.

In particular, in this embodiment, the winding mechanism for the printing tape 37 is connected to the first pin gears 66, 6.
7 and second pin gears 70 and 71, the rotation of the transmission gear 54 that engages with the rack gear 53 is transmitted as the rotational force for winding the printing tape 37. The engagement position of the tips of the teeth between the second pin gears 70, 71 mounted on the cassette holding plate 45 and the first pin gears 66, 67 as the gears shift from the lower to the middle and from the middle to the upper. The misalignment is suppressed to the extent that it does not affect the transmission of rotational force, that is, the first pin gears 66, 67 and the second pin gears 70, 71 are held in place no matter where the cassette holding plate 45 is in the lower, middle, or upper position. A reliable engagement relationship can be obtained between the printing tape 37 and the printing tape 37, and the printing tape 37 can be reliably fed in accordance with the movement of the carriage 4.

Further, in this embodiment, the printing tape 37
Since the winding mechanism is configured to transmit the rotational force applied to the second pin gears 70, 71 to the bobbins 46, 47 via the clutch mechanisms 72, 73, it is assumed that an excessive force is applied to the second pin gears 70, 71. When a rotational force of 4 is applied, the rotational force is
6 and 47, and therefore, damage to the printing tape 37 due to such excessive rotational force can be reliably prevented.

Further, in this embodiment, the printing tape 37
The winding mechanism includes a pair of bobbins 46 and 47 mounted on the cassette holding plate 45 and a pair of cores 41 and 42 disposed inside the tape cassette 6.
The bobbins 46 and 47 having a cross-shaped outer shape are inserted into the cross-shaped holes formed in the cores 41 and 42, and the cores 41 and 42 are rotated integrally with the rotation of the bobbins 46 and 47. Bobbin 4
There is no rotational deviation between the bobbins 46, 47 and the cores 41, 42, and the rotational force applied to the bobbins 46, 47 can be accurately transmitted to the cores 41, 42.

Further, in this embodiment, the shift mechanism for the tape cassette 6 includes a tape shift cam 96 that rotates with the rotation of the shaft 7, and a pin 98 is moved in accordance with the rotation of the tape shift cam 96. Since the cassette holding plate 45 is rotated through the cassette holding plate 45, the tape cassette 6 on the cassette holding plate 45 can be accurately shifted to the lower, middle, and upper stages according to the characteristics of the tape shift cam 96. Each printing area 3 of the printing tape 37 in the tape cassette 6
8, 39, and 40 can be accurately opposed to the thermal head 5.

Further, in this embodiment, the printing tape 37
The winding stop mechanism has a release cam 94 that rotates with the rotation of the shaft 7, and this release cam 9
The transmission gear 5 is transmitted via the moving body 55 according to the rotation of the
4 and the rack gear 53, the winding operation of the printing tape 37 can be accurately stopped according to the characteristics of the release cam 94, and the printing tape 37 can be stopped with a small number of parts.
The winding stop operation can be realized.

Further, in this embodiment, the pressure contact release mechanism of the thermal head 5 includes a pressure contact cam 95 that rotates as the shaft 7 rotates. The thermal head 5 mounted on the head base 111 by rotating the
Since it is configured to press the thermal head 5 against the platen 2 or release the press contact, it is possible to switch between press contact and release of the thermal head 5 with high accuracy according to the characteristics of the press contact cam 95, and this can be done with a small number of parts. operation can be realized.

Further, in this embodiment, as the shaft 7 rotates, a tape shift cam 96 forming a cassette shift mechanism, a release cam 94 forming a winding stop mechanism for the printing tape 37, and a thermal head 5
The tape shift cam 96, the release cam 94, and the pressure contact cam 95 are connected to a shaft 97.
Since the tape cassette 6 is rotated integrally through the shaft, the shifting operation of the tape cassette 6, the pressing release operation of the thermal head 5, and the winding stop operation of the printing tape 37 are linked to the rotation of the shaft. These operations can be made to work together at a desired timing, and these operations can be realized with a minimum number of parts, making it possible to keep manufacturing costs low.

Further, in this embodiment, the mounting structure for the carriage 4 is attached to the first edge 8 formed on the frame 1.
4, a second edge 85, a protrusion 88 formed on the carriage 4 and engaged with the second edge 85;
The carriage 4 can be movably attached to the frame 1 with a minimum number of parts, and is light in weight. , the structure can be made thinner.

Further, in this embodiment, since the guide means for the carriage 4 is structured by the stepped portion 86 formed on the frame 1 and the engaging portion 89 formed on the carriage 4, the structure is extremely simple. and
Easy to manufacture.

In addition, in this embodiment, the rack gear 53
The hole 90 formed in the rack gear 53 has a mounting structure of
The rack gear 5 is fitted with a plurality of protrusions or raised portions 91 formed on the frame 1.
3 is attached to the frame 1, the number of parts can be minimized, and the installation work is easy.

In this embodiment, the mounting structure of the thermal head 5 includes a head base 111 on which the thermal head 5 is mounted, a clamping body consisting of a lever 101 and a member 106 that clamps the head base 111, and springs 117 and 118. Because of the configuration, the thermal head 5 can be easily positioned at a predetermined position facing the platen 2 by one action of inserting the head base 111 with the thermal head 5 attached into the clamping body, and the thermal head 5 can be easily positioned at a predetermined position facing the platen 2. Due to the clamping force, the thermal head 5 including the head base 111 can be reliably held without positional deviation, regardless of the repeated press-release operation of the thermal head 5.

Further, in the above embodiment, as the shaft 7 rotates, the tape shift cam 96 moves along the arrow 13 in FIG. 15b.
The tape cassette 6 rotates in two directions.
rises from the bottom to the middle and from the middle to the top, and the 12th
Each printing area 38, 3 of the printing tape 37 shown in the figure
9 and 40, that is, the printing tape 37
Printing is done in order from top to bottom, but in contrast to this, the tape shift cam 9
6 in the direction opposite to the direction of the arrow 132 in FIG. 15b, the tape cassette 6 descends from the upper stage to the middle stage and from the middle stage to the lower stage, and each printing area 40, 39 of the printing tape 37 shown in FIG. , 38, that is, printing can be made sequentially from the bottom to the top of the printing tape 37.

Further, in the above embodiment, the hole 90 is provided in the rack gear 53.
, and the frame 1 is provided with a cut-and-raised portion 91, but on the contrary, a protrusion is provided on the rack gear 53,
The frame 1 may be provided with a hole into which the projection fits.

Further, in the above embodiment, the projection 88 formed on the carriage 4 is formed on the second edge 85 formed on the frame 1.
A first edge 8 formed on the frame 1 by engaging the
The pin 87 that engages with the frame 1 is attached to the carriage 4;
The carriage 4 may be provided with a protrusion that engages with a first edge 84 formed on the frame 1, and a pin that engages with a second edge 85 formed on the frame 1 and can be attached to the carriage 4. .

Further, in the above embodiment, the gear 93 and the release cam 9
4 and the pressure contact cam 95 are integrally formed.
These may be provided separately from each other.

[Effect of idea]

As described above, the thermal printer of the present invention has a configuration in which the head is released from pressure, the tape winding is stopped, and the cassette is shifted through the first, second, and third cams that are operated by the rotation of the motor. Moreover, since the printing work is configured so that printing can be performed in multiple stages of printing areas of different colors in the width direction of the printing tape, it has the effect of making it possible to print in multiple colors with a simpler and cheaper structure than before. play.

[Brief explanation of the drawing]

Figures 1a, b, c, and d are explanatory diagrams showing the overall configuration of an embodiment of the thermal printer of the present invention.
Figure a is a plan view, Figure 1 b is a front view, Figure 1 c is a right side view, Figure 1 d is a left side view, Figure 2 a, b, c.
2 is an explanatory diagram showing a cam provided in the embodiment shown in FIG. 1, FIG. 2 a is a side view, FIG. 2 b is a front view,
Fig. 2c is a characteristic diagram, Fig. 3 is a plan view showing the inside of the tape cassette provided in the embodiment shown in Fig. 1, and Fig. 4 is an example of cassette holding means provided in the embodiment shown in Fig. 1. FIG. 5 is an enlarged cross-sectional view taken along the line A-A in FIG. 4, and FIG. 7 to 10 are explanatory diagrams of the carriage portion provided in the embodiment shown in FIG. 1. FIG. 7 is a front view, FIG. 8 is a rear view, and FIG. 9 is a developed view showing the engagement relationship. is a side view, FIG. 10 is a back view, FIG. 11 is an enlarged sectional view taken along the line B-B in FIG. 6, and FIG. 12 shows a part of the printing tape provided in the embodiment shown in FIG. A front view, FIG. 13 is an exploded view showing the mounting structure of the rack gear provided in the embodiment shown in FIG. 1, and FIGS. 14 a, b, and c are release cams and pressure contact cams provided in the embodiment shown in FIG. 1. In the explanatory diagram,
Figure 14a is a side view, Figure 14b is a front view,
4c is a characteristic diagram, and FIGS. 15a, b, and c are explanatory diagrams of the tape shift cam provided in the embodiment shown in FIG. 1. FIG. 15a is a side view, FIG. 15b is a front view, and FIG. Figure 15c is the characteristic diagram, Figure 16a and b are the first
FIG. 16a is a front view, FIG. 16b is a plan view, and FIGS. 17a, b, and c are explanatory diagrams showing the head base provided in the embodiment shown in FIG. , FIG. 17A is a front view, FIG. 17B is a side view, FIG. 17C is a plan view, and FIGS. 18A, B, and C are the same as FIG. 1. 18A is a front view, FIG. 18B is a side view, FIG. 18C is a plan view, and FIG.
Figure a is an explanatory diagram showing the operation of the printing tape winding mechanism provided in the embodiment shown in Fig. 1, and Fig. 19b is an illustration showing the operation of the printing tape winding stop mechanism provided in the embodiment shown in Fig. 1. An explanatory diagram showing FIG. 20a,
20b and 20c are explanatory diagrams showing the operation of the tape cassette shift mechanism provided in the embodiment shown in FIG. 1, FIG. 20a is an explanatory diagram showing the tape cassette in the lower position, and FIG. An explanatory diagram showing the tape cassette in the middle position, FIG. 20c is an explanatory diagram showing the tape cassette in the upper position, and FIGS. 21a and b show the thermal head provided in the embodiment shown in FIG. 21A is an explanatory diagram showing the operation of the pressure release mechanism, FIG. 21A is an explanatory diagram showing the pressure contact state, FIG. 21B is an explanatory diagram showing the release state, and FIG.
The figure is a timing chart showing the rotational relationship of each cam. 1... Frame, 2... Platen, 4... Carriage, 5... Thermal head, 6... Tape cassette, 7... Shaft, 8... Cam, 9... Worm wheel, 10... Worm, 11, 16
... Stepping motor, 13 ... Lever, 15
...Slider, 17, 18, 19, 27, 28,
30, 31, 32, 92, 93...gear, 20,
21... Helical gear, 23, 26... Pulley, 2
4...Metal belt, 29...Paper feed shaft, 35...
...Lower case, 37...Printing tape, 38...Red printing area, 39...Yellow printing area, 40...Blue printing area, 41, 42...Core, 43, 44,
78, 79, 80, 82, 90... hole, 45...
Cassette holding plate, 46, 47... bobbin, 49,
50... Bearing, 53... Rack gear, 54... Transmission gear, 55... Moving body, 56, 57... Through hole, 58, 59, 100... Projection, 61... Wire spring, 62... Support Shaft, 63...Elongated hole, 64, 65
... Tape winding gear, 66, 67 ... First pin gear, 70, 71 ... Second pin gear, 72, 7
3...Clutch mechanism, 74...Shaft portion, 75...Flat plate portion, 76...Protrusion, 77...Friction plate, 81...
...Coil spring, 83...Bottom surface, 84...First edge, 85...Second edge, 86...Step, 87,
98, 115, 116...pin, 88...protrusion,
89... Engaging portion, 91... Cut-and-raised portion, 94... Release cam (second cam), 95... Pressure cam (first
cam), 96... tape shift cam (third cam), 97... shaft, 99... groove, 101... lever, 105... rising portion, 106... member, 11
1... Head base, 117, 118... Spring,
129... Recording paper.

Claims (1)

[Claims for Utility Model Registration] A frame forming a main body, a platen around which recording paper is wound, a carriage movable along the platen, and a frame mounted on the carriage and arranged to face the platen. a thermal head disposed on the carriage, printed tapes of multiple colors made of a heat-melting material and arranged in parallel in the width direction, a tape cassette in which the printed tapes are stored, and The printing tape is placed between the recording paper wound around the platen and the thermal head, and multiple colors can be printed on the recording paper by pressing the thermal head against the platen. In a thermal printer that performs
a gear mechanism for transmitting information to a third cam, and a member that contacts the working surface of the first cam and is displaced by the rotation of the cam, and presses the thermal head against the platen, and The movable body is moved via a head pressure release mechanism that performs the release, and a member that abuts the working surface of the second cam and is displaced by the rotation of the cam, and the movable body is moved as the movable body is displaced. By displacing the gear provided on the movable body, the power transmission path from the drive source to the winding shaft for winding the printing tape is cut off, the rotational drive of the winding shaft is stopped, and the above-mentioned printing is stopped. a tape winding stop mechanism that stops the tape winding operation; and a member that abuts the working surface of the third cam and is displaced by the rotation of the cam, by moving the tape cassette support member up and down. and a cassette shift mechanism that positions the tape cassette placed on the support member at a desired height position and positions the printing tape of a desired color between the recording paper and the thermal head. Thermal printer.