JPH02113965A - Printer - Google Patents

Abstract

PURPOSE:To reduce manufacturing cost and to conserve power by reducing the number of drive sources by also using the driving force of a driving force change over mechanism as that of the first driving source. CONSTITUTION:The head moving mechanism 71 performing the contact and separation of a printing head with respect to a platen 14 is operated in connection with the first drive source 122 mounted to a printer main body. The platen 14, a paper feed roller 38 for feeding printing paper to the platen and a drive reel stand 94a for a ribbon cartridge 85 are selectively connected to the second drive source 112 mounted to the printer main body through a driving force change-over mechanism 140. The driving force of the driving force change-over mechanism is also used as the driving force of the first driving source 12. By this method, the number of driving sources can be reduced to the necessary min., and the reduction of manufacturing cost and the conservation of power can be achieved.

Description

[Detailed description of the invention] The invention will be explained in the following order.

A. Industrial field of application B4 Overview of the invention C6 Prior art 1. Problems to be solved by the invention 0. Means for solving the problem F0. Effect G. Example G+. Overall printer (1. Formation G2. Supply Configuration of the paper section G1. Configuration of the paper feed tray and its locking mechanism G4. Configuration Gs of the paper feed mechanism and paper feeding system, Configuration Ga of the paper ejection section and paper ejection tray, Configuration of the head moving mechanism G7. Ribbon cartridge storage section Configuration G8. Configuration of the drive system G11 Configuration of the driving force switching mechanism GIO, Effects of the embodiments I Effects of the invention This invention relates to a thermal transfer color printer, etc., which prints color onto printing paper using an ink ribbon using a thermal head (print head).

11 Summary of the Invention The present invention provides a printer that prints on print paper using a print head inside the printer main body, in which the printer main body is provided with a gutter movement mechanism that brings the print head into contact with and away from the platen. Connected to this first drive source, the platen and the drive reel stand for the paper feed roller and ribbon cartridge (which feeds print paper to the platen) are attached to the printer body via a drive force switching mechanism. second
The number of drive sources can be reduced to the minimum required by selectively linking the two-legged drive force switching mechanism to the first drive source and using the drive force of the bipedal drive force switching mechanism as the drive force of the first drive source. , it is possible to reduce manufacturing costs and save power.

C. Conventional technology For example, a printer wraps print paper fed from a paper feed roller around a platen, and then winds up one ink ribbon in a ribbon cartridge using a thermal head (print head) and a take-up drive reel stand. Printers that print on the print paper via a printer are known. After this printing, the printed paper is discharged to a paper discharge section in the printer main body by a paper roller and stacked. ing.

D1 Problems to be Solved by the Invention However, in the conventional printer structure, each drive of the platen, paper feed roller, etc., print head, and drive reel stand for the ribbon cartridge nozzle must be driven individually! ] Since it was carried out using a total of three motors as separately provided driving sources,
J
(The power consumption is very high.). Furthermore, as a similar structure, this 13th application (tsu)
Previously filed patent application No. 1986-78693, 2°) There is a pudding evening.

Therefore, the present invention provides a platen etc. and a ribbon cart tII.
For ji,) Use the drive source of the drive reel stand as 1 to drive,
'! :j□7. ), the number is reduced by one side, and the cost is reduced accordingly.
It provides a link that can save 1 and convert to L4 (1, 5).

[To solve the problem of ε, if a print head and a platen are arranged in the main body of a T-stage printer, facing each other, 4
A 4-way paper feed roller is installed to convey the print paper toward the platen side (+, R).A drive reel stand for the ribbon cartridge is installed inside the printer body between the platen and the print head, and The first head movement mechanism attached to the printer body avoids contacting and separating the head from the platen.
At the same time, the platen, the paper feed roller, and the drive reel stand are attached to the printer main body via a drive force switching mechanism (j) and selectively linked to a second drive source ((()). A two-legged platen, a driving reel, a synthetic leather, and a paper feed roller are each made rotatable, and the driving force switching mechanism is linked to the first drive source, and the driving force switching mechanism is connected to the platen. or each rotation of the platen and the drive reel stand, or the driving force of the first drive source to switch the driving force to 3 rotations of the platen and the paper feed roller, respectively. It's Toshide.

F1 action By switching the driving force switching mechanism that drives the first driving source as the driving force, the second driving source is used as the driving force to switch between the platen, the platen and the drive reel stand for ribbon cartridge loading, or the platen and the supply. The paper rollers rotate at the same time. Also, the first
The print head is moved into contact with and away from the platen by the head moving mechanism using the drive source as a driving force.

G. Example An embodiment of the present invention will now be described in detail with reference to the drawings.

Overall structure of the G1 printer 1 in Fig. 17 is a thermal transfer color printer, and the printer main body 2 includes a rectangular frame-shaped inner printer 3 and a rectangular box-shaped case-shaped outer printer 1 that covers the inner printer 3.
It is roughly composed of. As shown in FIG. 2, on the right side of the front (front) of the printer main body 2, there are a paper feed tray receiver (paper feed section) 5 and a paper output tray receiver (paper ejection section) 6 in the form of shelves.
They are arranged on the left side and on the upper side, respectively, facing the printing section 7 located on the left side.

Then, the paper feed tray receiver C5' of the printer main body 2 is marked -.
Y: Between the front plate 3a and the rear plate 3b of the inner palm 3, there is a paper feed mechanism 1 that conveys print paper 8 one sheet at a time to the printing section 7.
0 rotatably (oscillates) via its drive shaft 11, and between the front plate 3a and rear plate 3b of the printer 3 between the printing section 7, the paper discharge 1, and the tray receiver 6. , the print paper 8 printed by the printing unit 7 is sent out to the paper discharge tray receiver 6 side 4--a plurality of paper discharge rollers 12 are rotatably supported via a support shaft 13.

In addition, the curved plate 3a of the inner noyano 3 located approximately in the center of the printing section 7
The platen 14 is supported between the and rear plate 3b! It is rotatably supported via +h l 5. The printing section 7 on the lower side of the platen 14 serves as a printer cartridge storage section 16.

Incidentally, as shown in FIG. 17, the paper discharge tray receiver 6 is
It is exposed on the I-IE side of the outer yarn 4 of the printer main body 2, and the paper feed tray 5 and cartridge storage section 67j are exposed on the lower right side of the front side of the outer yarn 4 of the printer body 2. and an opening/closing opening on the left side (cover 4 supported by L)
a and a cover 4b.

G2. Structure of Paper Feeding Section As shown in FIG. It is arranged between the plate 3a and the rear plate 3b, and is fixed with screws or the like to the corner of the stiff opening 3c.

On both sides of this paper feed tray receiver 5, +11
A pair of hook portions 5a, 5a are integrally colored. A paper feed tray 20 to be routed later is removably housed in the -χ1 hook portions 5a, 5a.

In addition, as shown in FIGS. 5 and 6, the L paper feed tray r receiver 5
In the center is a rectangular concave i'15b concave downward. The longitudinal direction of this recess 5b (the rear plate 3b of the inner yarn 3)
A pair of guides 115c and 5c are formed in the direction (perpendicular to the direction r). Then, insert a pair of guide grooves 5c into the rear surface of the recessed portion 5b to expose a portion of the F2 paper feed tray 20 to the outside of the printer main body 2.

5c along [4 motor vehicle 7E]. This eject member 18 is made of synthetic resin, as shown in FIG.
It is formed into a plate shape with a vertical U-shape and a 17-shape side.

That is, on both sides of this ejecting part [8, there is a pair of upright parts +8 that are inserted into the pair of guides 1M5c and 5c, respectively.
a, +8a is extrusion molded. Further, the end portions 18b, 18b sides of the pair of upright portions +8a, 18a are formed to protrude outward in an 11-shape so as to move by 4M on the -1- plane of the bipedal portion 5b. As a result, the eject part (I8) has a hook rW<l8 that comes into contact with the tip end of the paper feed tray 20 on the tip side that hangs down in a 15-shape.
In a state where c is suspended from the back surface of the recessed portion 5b, it can freely slide back and forth by a predetermined stroke along the guide grooves 5c, 5c.

Further, a pair of end portions 18b of the ejecting member 18,
17-shaped notches 18, J, and I'd of 18b, and a pair of notches 5 on the rear plate 3b side of the inner chassis 3 of the recess 5b.
A tension coil spring (tensile elastic member) 19.19 of -χI is interposed between d and 5d. As a result, the ejecting member 18 is pulled and biased when the rear plate 3b side is inserted.

Structure of the G3 paper feed tray and its lock mechanism As shown in FIG. 7, the paper feed tray 20 is made of synthetic resin and is formed into a stiff rectangular box shape with the upper part slightly larger than the print paper 8 completely open. Yes, - collar part 21a of side part 21 and other side part 22
By inserting the flange portion 2+a into the pair of hook portions 5a, 541 of the paper feed tray receiver 5, the device can be attached to the paper feed tray receiver 5 at will. From the center of the bottom 23 of this paper feed tray 20 to the negative side 21, approximately half of the back side (opposite the printing surface) of the print paper 8 set in the paper feed tray 20 is placed. An exposed opening 1-1 portion 2.1 is formed.

Further, the front portion 25 side of this paper feed tray 20 is a gripping portion. Inside this front part 25 and inside the tip part 26 facing R=i toward the front part 25, the lowest printing paper 8 placed on the bottom part 2:3 is placed one by one at the printing part 7. Side-・
Each base 27a of a pair of delivery levers 27 and 27 for delivery is pivotally supported by a bottle. Claws 27b, 27b bent and formed on the tip side of the pair of delivery levers 27, 27 are located at each corner on the opening 24 side of the paper feed tray 20, and the opening 24 of the paper feed tray 20 By placing the respective corner portions on the 24 side, the print paper 8 can be sent out one by one to the printing section 7 side.

Furthermore, a locking portion 28 is formed on the front end portion 26 side at the center of the back surface of the bottom portion 23 of the paper feed tray 20 .

The locking portion 28 has a long tapered surface 28a inclined at approximately 45 degrees with respect to the tip portion 26, a V-shaped colored surface 281], and a similar tapered surface 28c projecting into a substantially triangular prism shape. Therefore, on the rear plate 3b side of the inner shear 3, it is engaged with and disengaged from the locking portion 28 to maintain the attached state of the paper feed tray 20 attached to the paper feed tray receiver ((5), A locking mechanism 30 is provided to release the attached state.

As shown in FIG. 8, the locking mechanism 30 includes a substantially dogleg-shaped locking plate 32 rotatably supported via a shaft 31 on a notched bent horizontal portion 3d of the rear plate 3b, and Board 3
One end of paper feed tray receiver 5 side of 2; the lock plate 32 is placed so that the lock bin 33 erected on 32a and the hook portion 32b at the other end of the lock plate 32 are inside the rear plate 3b. It consists of a rotational biasing force 4 and a tension coil spring 34.

As a result, when the front part 25 of the paper feed tray 20 is inserted into the paper feed tray receiver 5 while pushing the front part 25 of the paper feed tray 20, the lock plate 32 resists the tensile force of the tension coil spring 34 as shown in FIGS.
Rotate as shown in c) and lock pin; 33 is paper feed tray 2.
The V-shaped surface 28[) of the 1L portion 28 of 0 is engaged to lock the mounting. To release this state of loading, press the front part 25 of the L paper feed tray 20 further, as shown in FIG. 20(d).
As shown in FIG. 4(e), the lock pin 33 is disengaged from the square 281) of the -1 arrangement locking portion 28, and the -1 mounting lock state is released.

G4 Structure of Paper Feeding Mechanism and Paper Feeding System As shown in FIG. The drive shaft 1 is rotatably hooked between the front plate 3a and the rear plate 3b of the inner palm 3, and the pair of arm members 36. is rotated by the drive shaft II.
a rotating shaft 37 that revolves through a rotary shaft 36; a rubber paper feeding roller (paper feeding means) 38 that is fixed to the rotating shaft 37 and transports the print paper 8 sheet by sheet to the 1-2 printing section 7; Limiters 3 are interposed on both sides of the paper feed roller 38 between the drive shaft II and the rotation shaft 37, and control the torque of the rotation shaft 11.
It is roughly composed of 9.

The compression limiter 39 is provided between each arm member 36 rotatably supported by the drive shaft 11 and a valley drive gear 40 attached to the drive shaft 11 inside each arm member 36. First limiter 41 made of a coil spring
, each of the arm members 36 rotatably supporting the rotation shaft 37, and the rotation shaft II inside each arm member 36.
a driven gear 4 that is provided in and meshes with the valley drive gear 40;
2 and a second limiter 43 interposed between them.

Each of the second limiters 43 includes a limiter rotating shaft 45 that is fixed to the rotating shaft 37 and rotatably supports the driven gear 42 by sandwiching the felt 44;
The felt 17 is sandwiched between the spring presser 16 rotatably supported on the arm member 36 side of the limiter rotation shaft 45 and the driven gear 42 on the driven gear 42 side of the limiter rotating shaft 45. The felt presser 48 is supported by the felt presser 48, and the compression coil spring 19 is interposed between the spring presser 46 and the felt presser 18.

The first limiter 11 is designed to control the torque of the pair of arm parts (436, 36) around the drive shaft 11, and also to control the size of the paper feed roller 38 and the white spots on the printed paper 8. It is controlled by the force required to lift it.

Further, the second limiter 13 is configured to control the torque of the paper feed roller 38, and also controls the torque of the paper feed roller 38.
The force is controlled to the extent necessary to separate and transport the materials. Note that the pair of arm members 36, 36 are prevented from being removed by the respective wab sawers 50. Further, on the upper surface of the pair of arm members 36.36, there is a plate spring 51 that contacts the lower edge portion 27c of the pair of delivery levers 27.27 of the paper feed tray 20.
are installed respectively. This pair of leaf springs 51, 5
1, the pair of delivery levers 27.2
7 claw portion 27b.

27b is always pressed against the print paper 8 set on the bottom 23 of the paper feed tray 20.

As shown in FIG. 3, an inner paper guide plate 5 made of synthetic resin and serving as a paper feed guide member extends from the paper feed roller 38 in the inner chassis 3 to one peripheral surface of the platen 14.
2 is arranged. Furthermore, between the paper feed tray holder 5 and the platen I/I, there is a 4 paper guide plate 5 made of gold'tA.
3 is arranged.

A mounting frame 54 made of synthetic resin and forming an opening is attached to one side of the platen 14 in the inner shear 3.

The mounting frame 54 is removably provided with a paper guide plate 55 made of synthetic resin as a guide member that covers one peripheral surface of the platen 14 from its center to the other side. The paper guide plate 55 has a plurality of ribs 55a extending vertically in an arc shape toward the platen 14 side. A pinch roller 56, which corresponds to the platen 14, is rotatably supported via a sleeve 57 between the pair of ribs 55a located in the middle.

Further, the upper surface side of the vapor guide 55 is covered with a metal plate-shaped lid 58 that is engaged with and detached from the -I edge of the front plate 3a of the inner yarn 3 and the upper edge of the rear plate 3a. L It's turning into a sea urchin. That is, one end side of this lid body 58 is connected to one 21 of the rear plate 3b.
It can be inserted and engaged freely into the locking holes 3e and 3e, while a U-shaped stopper 59 made of synthetic resin is fixed to the other end. A pair of claw portions 59a are formed on the distal end side of this stopper 59.

By attaching and removing the lid 59a to a predetermined position on the upper edge of the temporary 3a, the lid 58 can be removed from the printer body 2.

As shown in FIG. 17, a rectangular opening 4C is formed on the outer yarn 1 corresponding to the lid 58. During this time, the first part 4C can be opened and closed with a rectangular lid 4d.

G6. Structure of Paper Discharge Section and Paper Discharge Tray As shown in FIG. 2.3, the paper discharge tray receiver 6 is made of resin and is formed into a rectangular box shape with openings on the front and "-" sides. It is attached at a predetermined position on the upper right side between the front plate 3a and the rear plate 3b of No. 3. The bottom of the paper discharge tray receiver 6 has two high and low bottoms ff16a and 6b, and the high bottom 6ah on the rear plate 3h side is less than the first paper discharge position, and The lower bottom portion 6b is the second paper ejection position.

Approximately at the center of the high bottom 6a of the paper discharge tray receiver 6, there is a pair of vertical openings 6d extending from the rear edge of the bottom 6a to the top of a rear part 6c standing vertically.

6 (3 is made of cedar. This pair of openings 6 d ,
A pair of vapor extrusion portions 60a, 60a protrudingly formed at the tip of a substantially U-shaped paper ejection extrusion pawl 60 are freely retractable from Gd. That is, the lower proximal end 60b of the paper ejection pushing claw 60 is rotatably supported by the bin 9a of the mounting plate 9 attached between the front plate 3a and the rear plate 31). Further, a bin 61 is embedded in the base of the paper ejection pushing claw 60 and projects horizontally.

As a result, the pair of paper pushing parts 60a, 60a of the paper ejecting pushing claw 60 rotates around the bin 9a of the mounting plate 9, and protrudes above the high bottom part 6a from the pair of openings 6d6d. It has become. Furthermore, a horizontal guide piece 6e for guiding the ejected print paper 8 is protruded from the rear portion 6c. Further, the bin 61 protruding from the base of the "-2 paper ejecting push-out claw 60 is connected to an operating plate 125, which will be described later, via a temporary slide 621 and a rotating plate 63.
When the slide plate 62 moves back and forth, the pair of paper extrusion parts 60a, 60a of the paper ejection extrusion claw 60 move into and out of the pair of opening parts 6d, 6d. It has become.

Further, on the low bottom portion 6b of the paper discharge tray receiver 6, as shown in FIG. 1, a paper discharge tray 64 is housed in a removable manner. Further, above the upper vapor guide plate 53, a pair of upper and lower vapor guide temporary 65.6G are arranged at the upper edges of the 0;1 temporary 3a of the inner yarn 3 and the rear plate 3b. A pinch roller 67 that is in contact with the platen 14 is rotatably supported on the F side of the upper temporary bar guide 66 via a support shaft 68. The print paper 8 to be printed and discharged is inserted between these two lower vapor guide plates 65 and 66, and is printed on each paper discharge roller 1.
2 and is stacked on the discharge sheet L/Leiro 4. Furthermore, a light reflective paper edge sensor 69 is arranged near the platen 14 of the lower vapor guide 66 marked +FJ and the upper vapor kite plate '53 to detect the edge of the printing paper 8 and decide the start of printing. be.

G8. Structure of Head Moving Machine Tank As shown in FIG. 3, below the platen 14 of the printing section 7, a planar thermal head (print head) 70 is brought into contact with and separated from the platen 14. 7
1 is arranged.

As shown in FIG. 11, the head moving mechanism 71 has a support shaft 7 that is hooked between the front plate 3a and the rear plate 3b of the inner palm 3.
a head support member 73 that is swingably supported by the thermal head 2 and to which the thermal head 70 is fixed;
A sub-head support member is pivotally supported on both sides of the support shaft 72 together with a head support member 73, and has a pair of compression coil springs 76 and 76 interposed between the heat sink 74 of the round head 70 and the bottom plate portion 75a. 75, and one end of the sub-head support member 75 is pinned to animal skin on both sides -2
1 link'! 7.77 and this - light link 77.7
A recess 79 at the tip of the bottle 78 and 78 protruding from the other end of 7
a, a pair of drive arms 79, 79 that engage with 79a to swing the head support member 73 and sub-head support member 75 toward the platen 14;
9. A drive shaft 80 which has n fixed parts of 79 and is rotatably supported by the fat plate 3a and rear plate 3b of the inner yarn 3, respectively, and the two sides of the bipedal sub-head support member 75. The ribbon roller 82 is rotatably supported via a pair of L-shaped auxiliary arms 81 and 81.

As shown in FIG. 12, the head support member 73 is formed into a U-shaped plate shape, and the insertion holes 73a, 73 into which the markings 111172 are inserted are inserted into the bases on both sides of the upright side.
It forms a. These three insertion holes 73a are inserted into the platen 1.
4 are formed in the long holes extending in the head suppression direction, so that the head support member 73 can be freely attached to the platen I.
= You can move to the 1 side, it's on the right side. Thereby, self-alignment of the thermal head 70 can be easily achieved. In addition, for the head of the thermal head 70 at this time, see below.

When the support member 73 is pressed against the platen 14 by each drive arm 79 using the support shaft 72 as a fulcrum, the force is applied by the pair of compression coil springs 7676. The head support member 73 swings toward the platen I4 due to the biasing force of the pair of compression coil springs 76 and 76, but this is regulated to a predetermined value by the flanges 751 on both sides of the sub-head support member 75. Well, there it is.

Note that the ribbon roller pressure of the ribbon roller 82 is -1
- Note 6 auxiliary arm 81 and the sub-head support part I (75
Tension coil spring 8 interposed between:
1-) is given separately from the head pressure.

Gt, Structure of Ribbon Cartridge Storage Portion As shown in FIG. 3, the ribbon cartridge storage portion 16 has a space in which a ribbon cartridge 85 can be stored. This ribbon cartridge 85; J, Y (yellow) 1 inside its main body.
It rotatably supports a feeding reel 87 and a stocking ribbon reel 88, each of which attracts a continuous in-liripon 86 in a colored area consisting of a young color area of M (magenta) and 0 (noah). Incidentally, the cue position of the Y color of the quick ribbon 86 is detected by a light transmission type sensor 89. This transmission type sensor 89 is composed of a light emitting section 89a and a light receiving section 89b.

The above ribbon cartridge! The storage section 16 has an inner compartment:
An upper holding plate 90 for holding the supply ribbon reel side 87 of the ribbon cartridge 85 is provided between the front plate 3a and the rear plate 3b of the ribbon cartridge 85; It is generally composed of a lower holding plate 91 that holds the reel 88 side.The front plate 3a is provided with an insertion opening 92 for the ribbon car ridge 85,
Said rear plate 3 b 1. : is 1 in which the supply driven reel stand 93 and the winding drive reel stand 94 are mounted diagonally upward and downward, respectively.

As illustrated in FIG.
Each shaft 96 protrudes inward from the rear plate 3b fixed to 5,
97, and limiter gears 98 and 99 are respectively provided between the mounting plate 95 and the rear plate 3b. Further, each of the reel stands 93.9=1 has reel claws 93a, 94a protruding from the rear plate 3b side to engage with the supply ribbon reel 87 and take-up ribbon reel 88 of the ribbon cartridge 85, respectively. ing.

Gs, drive system configuration As shown in FIG. 1.16, the drive shaft 11 of the paper feed mechanism 10
and paper ejection [J-ra 12 support shaft 13 and platen 1.1 support ++! Rear plate 3bJ of the inner yarn 3 of i + 5:
i) At each outer end, there is a drive gear 10 (
), the paper ejection roller drive gear 101 and the platen drive gear 102 are respectively fixed.

-1- The distribution paper drive gear 100 is a large diameter intermediate gear I03
It meshes with the small diameter intermediate gear) 04 through.

This σ) small-diameter intermediate gear+04 is connected to a compression coil spring 10 to a shaft 105 via a driving force switching device (1 to 10), which will be described later.
The first shift gear 107, which is always urged outward through
They are designed to engage when moved. This first shift gear 107 is configured to reciprocate in three positions, outer, neutral, and inner positions, as described above, by the driving force switching mechanisms 1 and 10, and is connected to the large diameter gear portion 108a. The large diameter gear portion 108 of the intermediate gear 108 consisting of the small diameter gear portion +08b meshing with the platen drive gear 102
It meshes with a.

The large-diameter gear portion 108a of the intermediate gear 108 is connected to a second drive force switching mechanism +50, which will be described later, and a second drive force switching mechanism +50, which is constantly biased outwardly via a compression coil spring 110 to the shaft 109.
Small diameter gear ffl of shift gear 111! I 1. I
It meshes with a. The large diameter worm gear portion 111b of the second shift gear 111 is moved inwardly (toward the rear plate 3b side) by the second driving force switching mechanism +50 against the compression force of the compression coil spring +10. When moving, stepping motor (second drive source) 1
It is designed to mesh with 12 worms 1+3.

Furthermore, the small diameter gear portion 11 of this second shift gear II+
1a meshes with the paper ejection roller drive gear 101 via a pinion 114.

Further, when the first shift gear 107 is moved outward by the compression force of the compression coil spring 106 by the drive force switching mechanism 140, it engages with the limiter gear 99 of the take-up drive reel stand 94 via the intermediate gear 115. The winding drive reel stand 94 is rotated by the winding operation.

A head drive gear 12 is provided at the end of the drive shaft 80 of the head moving mechanism 71 outside the rear plate 3b of the inner shear 3.
It is fixed at 0. This head drive gear 120 meshes with the small diameter gear ff1121b of the head idler gear 121, which consists of a large diameter gear portion 121a and a small diameter gear portion 121b. This head idler gear + large diameter gear part of 21 +
21a is a stepping motor (first drive source) +22
Large-diameter gear 12.1 that meshes with the worm 123 of
3 and a small diameter gear part 124b of the intermediate gear +24, and is rotatable by the driving force of the stepping motor 122.

At a predetermined position on the side surface of the head drive gear 120 on the side of the rear plate 3b, there is an actuation plate 12 for rotating the discharge sheet pushing claw 60.
A pin 126 protruding from one end of 5 is inserted and engaged.

This actuating plate +25 is formed into a long L-shaped plate, and has long holes I25a, 125'b, 125c formed long in the longitudinal direction on both sides and the - side of the rear plate 3b.
By inserting the respective bottles 127, 128, and 129 protruding from each other, it is supported so as to be movable back and forth in the longitudinal direction.

Further, a rotating plate 63 of the discharge sheet pushing claw 60 is supported by a pin on the upper bent portion 125d of the operating plate +25. As a result, the actuating plate 125 moves back toward the head drive gear 120, as shown by the two-dot chain line in FIG. The high bottom part 6a of the paper output tray receiver 6 is inserted into the pair of openings 6d, 6d of the paper output tray receiver 6 and moved forward as shown by the solid line in FIG. 1 so that it protrudes to one side
It's quiet.

In addition, the bin 127j of the paper feed roller drive gear 100 example of the rear plate 3b is t) η locking device +, the hook portion 32b of the lock plate 32 that protrudes outward from the rear plate 3b of q3o.
The shield portion of the eject stopper means (130) is made of animal skin. This eject stopper 130 is formed in the shape of an arm plate, and a pin 131 protruding from the actuating plate 125 is inserted into a long hole 130a formed in the longitudinal direction at the center. It is engaged. As a result, when the actuating plate 125 reciprocates, as shown by the solid line and the two-dot chain line t in FIG.
- One leg of the eject stop lever 130 is designed to swing 4-, and when the operating plate 125 moves back, the lock plate 3 is
By keeping the hook portion 32d of No. 2 in a protruding state,
This prevents the paper feeding l/ray 20, which is attached to the printer main body 2 and locked by the locking mechanism 30, from being unlocked during one printing during paper feeding.

Further, the large diameter gear portion 12 of the helad idler gear 121
On the outer surface of 1a, there is a protrusion 121c and a V-shaped cam surface 1.
21d and a recessed portion 121c are formed respectively. The protrusion 121c and the cam surface 121d have a brake arm 1 for a driven reel stand for supply and a drive reel stand for take-up.
32, +33 of the knotted ends 132a. 133a is in contact. Each of these brake arms 132, +33 is formed of 7 cedar wood, and each of the support shafts +34. ．． It is rotatably supported via I35. In addition, each brake arm 132, 1
Six tensile coil springs 137 and 138 are interposed between the base of 33 and the support shaft 136 that rotatably supports the helad idler gear 121, and the tips thereof! 32b
．． I33)) can be engaged with and separated from the limiter gears 98 and 99 of the three-reel units 93 and 94.

G. Configuration of driving force switching mechanism The driving force switching mechanism 140 has small diameter gear parts 1 and 11 that mesh with the head idler gear 121, and a cam surface with an uneven surface on one side.
Cam gear 14 consisting of a large diameter cam portion with 42a + 42
3, and a rod-shaped support 145a is rotatably attached to the U-shaped mounting plate 14.1 fixed to the rear plate 3b' of the inner 3. is brought into contact with the cam surfaces 1 and 42a of the cam gear [43], and the leaf spring portion 146 on the other end side is brought into contact with one side of the first knot gear 107, and the unevenness of the cam 142a causes the leaf spring portion to 146, and a shift lever 145 for moving the shift gear 107 to three positions: outside, neutral, and inside.

A pair of pin portions +411, 141a are protruded from one side of the small diameter gear portion 14+ of the cam gear +43. A base 149a of a 17-shaped lock arm 149 rotatably supported by a U-shaped mounting plate 147 fixed to the mounting plate 95 via a spring +48 is attached to the pair of bottle parts 141a, 141a. It is possible to connect or separate at will. This base 14
．． When 9a comes into contact with the pair of bins f41a, I and 11a listed in -1-, the claw portion 14 that has engaged with the supply driven reel stand 93 at its tip resists the biasing force of the spring 118 labeled L.
9b side is separated from the locking portion 98a of the limiter gear 98 of the reel stand 93, and the reel stand 93 rotates.

The second driving force switching mechanism 150 is a head idler gear 1
A hook-shaped tip 15 that is inserted into and separated from the recess 121e of 21
1a, a hole 151b formed in the center, and a bottle fKrJI 51c protruding from the base.
51c, and one of the bottle portions 152b that protrudes upward and downward from the central portion is connected to the hole 151 of the operating lever +51.
b, and the other bin part 151b is attached to the mounting plate 95.
An intermediate operating lever 152 having a long hole 152a at its tip and a rod-shaped support portion 153c rotatably supported on the bracket portion 95a of the mounting plate 95, and one end portion 153a of the rod-shaped support portion 153c is rotatably supported on the bracket portion 95a of the mounting plate 95. Long hole 152a of operating lever 152
The leaf spring portion 153b on the other end side is brought into contact with one side of the second shift gear III, and the shift gear 111 is moved by the leaf spring portion +53b by rotation of the operating lever +51. It is composed of a shift lever 153 for shifting to two positions, one on the outside and one on the inside.

According to the printer l of the embodiment, as shown in FIG. 8
(including during jamming, etc.), the paper feed roller 38 of the paper feed mechanism 10 is tilted downward, and the paper ejection pushing claw 60 is
It protrudes above the high bottom portion 6a of the paper discharge tray receiver 6. At this time, as shown in FIGS. 27 and 28, the first shift gear 107 is in a neutral position, and the second shift gear III is in a position away from the worm 113 of the stepping motor 112. ing.

From this state, as shown in FIGS. 18 and 19, when the paper feed tray 20 is attached to the paper feed tray receiver 5, the paper feed tray 20 is attached to the lock mechanism 30 as shown in FIG. 20(c).
locks it in its attached state. At this time, the hook m32b of the locking mechanism 30 projects outward from the rear plate 3b, as shown in FIG. Then, when the print button (not shown) is pressed 4, the stepping motor 122 is driven.
The head drive gear 120 and the like rotate. Due to this rotation of the head drive gear 120, etc., as shown in FIGS.
40 to the outer bonnonyon and intermediate gear 115
is engaged with the limiter gear 99 of the take-up drive reel stand 94 through the drive reel stand 94, and by driving the take-up drive reel stand 94, as shown in FIG. The second shift gear 111 is engaged with the worm 113 of the stepping motor 112 by the second driving force switching mechanism +50, and the platen 14 and paper ejection roller 12 are rotated. be). When starting the ink ribbon 86, the brake arm I3 of the supply follower table 93
2. The lock arm 19 and the brake arm 133 of the take-up drive reel stand 94 are turned off, and the beginning of the ink ribbon 86 is smoothly performed. Further, the actuating plate 125 is moved forward by the head drive gear 120, and the eject stopper 130 is attached to the hook portion 32b of the biped locking mechanism 30.
When the paper feed tray 20 is locked, it becomes impossible to unlock the device lock state of the paper feed tray 20. This prevents the paper feed tray 20 from coming off during subsequent paper feeding, printing, etc. By the IL movement of the actuating plate 125, the pair of noheher push-out portions 60a, 60a of the discharge paper push-out claw 60,
n; Open the rear 6c by 1x·t from the -L side of the high bottom 6a of the paper ejection tray 6 [1 part 6d and sink into Gd. The paper ejecting push-out claw 60 remains in this state until the paper is ejected.

The stepping motor 122 drives the first soft gear 107 via the driving force switching mechanism 140 and the like.
However, as shown in Fig. 31, the inner bossilon/,:
paper feed mechanism 10 via intermediate gears 103,104
It meshes with the paper feed UJ-ra drive gear 100. Due to the rotation of this paper feed roller drive gear 100, the 22.2.1
As shown in the figure, the paper feed roller 38 moves in all directions and comes into pressure contact with the back surface of the lowest print paper 8 exposed from the opening of the paper feed tray 20 [-'l F12 =1. Then, the print paper 8 is fed to the platen +4 by the rotation of the biped paper feed roller 38. Incidentally, during this paper feeding, the brake arms 132, 133 and the brake arm +49ij
It is in the on state.

The print paper 8 that has reached the platen 1 is wound around the circumferential surface of the platen 14 with both ends of the print paper 8 overlapping as the print 14 rotates in the direction of the arrow in Fig. m24. Furthermore, this print paper 8
When loading, the first soft gear 107
As shown in FIG. 33, it is located in neutral Bossillon.

The series of paper feeding operations is completed at I-.

Next, when the stepping motor 122 is driven and the drive gear +20 rotates, the thermal hept 70 is moved by the moving mechanism 71 and the ink is applied to the platen 1, as shown in FIG. The ribbon 86 is pressed. At this time, as shown in FIG. 35, the first soft gear 107 (11j1) is located at the outer boss, as in the case of starting the ink ribbon 86, and prevents the take-up drive reel stands 9, 1 from rotating. At this time, +irj brake arm 1; 3
3 and lock arms I and 19 are turned off, but the brake arm 132 of No. 477 remains on, and when printing, an appropriate brake is applied to the supply driven reel stand 93 to prevent it from idling, and the ink ribbon 86 is appropriately The basics of the game will be played. From this state, Y (yellow) 1M (
Magenta) 1 C (Noan) print should be made.

Pudding! - When the printing on the paper 8 is completed 4゜, the platen 14 rotates in the opposite direction to the paper feeding direction as shown in FIG.
6, ): 1. The paper is sent to the second tray, is ejected, and then is guided and regulated by the paper tray 6c and the paper tray holder 1.
It is set at the high bottom 3a1 of t6. During this paper ejection, as shown in FIG. 33, the first soft gear 10
7 (in the neutral position, stepper motor 1
12, only the platen 14 and the paper ejection roller 13 are rotated. Thereafter, the actuating plate 125 moves back, so that the pair of paper jF +It i! By returning to the position from 60a and 60a and protruding from the pair of openings 6d and 6d, the printed paper 8 that had been set on the high bottom portion 6a is pushed onto the paper output tray 64F. Then, the paper ejection operation is completed.

In this way, the platen 14 and the paper ejection roller 13, or the platen 14 and the paper ejection roller 13, and the winding drive reel stand 9.
1, or the platen 14, the paper ejection roller 13, and the paper feed roller 38 are driven by the stepping motor +12 to rotate simultaneously by switching the driving force switching fffJt140 driven by the stepping motor 122. In addition, by driving the stipping motor 1.22 ff) described in -1-, the movement mechanism 71 moves 60 in and out of the υ paper extrusion, and the movement mechanism 71 moves 1°.
Apply brakes to the limiter gears 98 and 99 of the downward movement, the supply driven knoll stand 93 and the take-up drive reel stand 9 and 1 (the brake arms 132 and 133 are on),
As shown in FIG. 37, when the print paper 8 jams between the platen 14 and the vapor guide plate 55, the second/button gear 111 is switched to stop the platen 14. Thus, two motors 112. +2
Since the drive unit 2 also serves as a large number of drives to perform all operations necessary for printing, the number of expensive motors can be reduced to the minimum necessary, reducing the cost of the printer 1.
Significant power savings can be achieved.

1] Effects of the Invention 1) According to the present invention, the head moving mechanism for bringing the print head into contact with and away from the platen is linked to the first driving source attached to the printer main body, and the platen and the platen are connected to each other. A paper feed roller that feeds print paper and a drive reel stand for a ribbon cartridge are selectively linked to a second drive source attached to the printer body via a drive force switching mechanism, Since the driving force of the switching mechanism is used as the driving force of the first driving source, the number of driving sources can be reduced to the minimum necessary, reducing manufacturing costs.
Power saving can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a rear view of the main body of a printer showing an embodiment of the present invention, Fig. 2 is a perspective view of the main parts, Fig. 3 is a perspective view of the main parts, and Fig. 4 is a schematic side view of the printer. Figure 5 is a plan view of the paper feed tray holder, Figure 6 is a sectional view taken along line Vl-Vl in Figure 5, Figure 7 is a perspective view of the paper feed tray, and Figure 8 is a view of the paper feed tray. FIG. 9 is a perspective view of the paper feeding mechanism. FIG. 10 is a sectional view of the paper feeding mechanism. FIG. 11 is a partial perspective view of the head moving mechanism. FIG. 12 is a perspective view of the head moving mechanism. A schematic perspective view of the main parts, Fig. 13 is a side view of the head moving mechanism, Fig. 14 is a rear view of the head moving mechanism, Fig. 15 is a plan view of the ribbon cartridge drive system, and Fig. 16 is an exploded view of the entire drive system. Perspective view, Figure 17 is a perspective view of the entire printer, Figure 1
FIG. 8 is a sectional view showing a state in which a paper feeding tray is being installed, FIG. 19 is a sectional view showing a state in which a paper feeding tray is being installed, and FIGS. 20(a) and (b). (c), (d), and (e) are explanatory diagrams showing the locking and unlocking of the paper feed tray in sequence, Fig. 21 is an explanatory diagram showing the state of paper feed n maj, and Fig. 22 is an explanatory diagram showing the paper feed tray status. 23 is a schematic explanatory diagram showing the state when the ink ribbon is positioned, and FIG. 24 is a schematic explanatory diagram showing the state when the ink ribbon is being fed.
Figure 5 is a schematic explanatory diagram showing the time of printing, Figure 26 is a schematic explanatory diagram showing the time of paper ejection, Figure 27 is a bottom view of the main parts of the drive system at the initial stage, and Figure 28 is the main part of the drive system at the initial stage. FIG. 29 is a bottom view of the main parts of the drive system when the ink ribbon is started, FIG. 30 is a side view of the main parts of the drive system when the ink ribbon is started, and FIG.
The figure shows a bottom view of the main parts of the drive system during paper feeding, Fig. 32 is a side view of the main parts of the drive system during paper feeding, and Fig. 33 shows a bottom view of the main parts of the drive system during loading and paper ejection. Figure 34 shows Rhode Impa 1
A side view of the main parts of the drive system during paper ejection, Fig. 35 is a bottom view of the main parts of the drive system during printing, Fig. 36 is a side view of the main parts of the drive system during printing, and Fig. 37 shows jamming of printed paper. FIG. 1 Printer, 2... Printer main body, 8... Print paper, 1, 4... Platen, 38... Paper feed roller,
70 thermal head (print head), 71... head moving mechanism, 85... ribbon cartridge, 94... drive reel stand, 112... motor (second drive source), 12
2. Motor (first drive source), 140. Driving force switching mechanism. Slant Uta Rose on the Pick-up Tray Figure 7 Cutaway of the Akihabune Spirit Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] (1) A print head and a platen are arranged facing each other in the printer body, and a paper feed roller is provided at a position facing the platen to convey the print paper to the platen side, and these platen and printing A drive reel stand for a ribbon cartridge is provided in the printer body between the heads, and a head moving mechanism for bringing the print head into contact with and away from the platen is linked to a first drive source attached to the printer body. selectively linking the paper feed roller and the drive reel stand to a second drive source attached to the printer body via a drive force switching mechanism, so that the platen, the drive reel stand, and the paper feed roller are respectively rotatable; Further, the driving force switching mechanism is linked to the first driving source, and the driving force switching mechanism controls the rotation of the platen, the rotation of the platen and the drive reel stand, or the rotation of the platen and the paper feed roller. A printer characterized in that the driving force for switching to each of the three rotational positions is the driving force of the first driving source.