JPS6387243A - Recording apparatus - Google Patents

Abstract

PURPOSE:To perform high quality recording, by providing an energizing member for energizing a gear in the direction opposite to a feed direction on a take-up shaft side becoming the feed side of a membrane member. CONSTITUTION:In such a state that a drive gear 241 is fixed to a left film shaft 199, a drive gear 245 is rotated in a direction of imparting tension to a film 3 to bend a spring in a take-up direction and an idle gear 251 is mounted on a shaft 247. A clutch gear 255 is meshed with the idle gear 251 and rotated in a counterclockwise direction to rotate the drive gears 241, 245 in the counterclockwise direction. By this mechanism, the film 3 is take up on the side of the fixed drive gear 241 and, since a feed side becomes the side of the drive gear 245 provided with the spring, the tension of the film 3 is held. When the clutch gear 255 is meshed with an idle gear 249, the clutch gear 255 is rotated in the direction reverse to the aforementioned direction to take up the film 3 on the side of a fixed gear 243. Therefore, proper tension is always imparted to the film 3.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention provides a thermal head equipped with a heat generating element on a movable thin film member having an ink holding portion consisting of a large number of small holes or recesses. This is a so-called non-impact method in which ink is ejected onto the recording material by the pressure of air bubbles generated between the thermal head and the ink retained in the ink retention portion of the thin film member by the heat generated by the heating element. It relates to a recording device.

(Prior Art) In general, in this type of recording device, when a film with ink held in the small holes or four parts is moved back and forth between two winding shafts in a bent state, the film and the thermal head come into close contact with each other. The quality of the print on the recording paper deteriorates.

Conventionally, a drive gear is fixed to one of the two winding shafts to which both ends of the film are fixed, and is attached to the other via a spring with a biasing force in the direction that generates tension in the film. The present applicant has filed an application in which the drive gear, ie, the take-up shaft, is rotated via an idle gear meshing with the drive gear to reciprocate the film.

(Problems to be Solved by the Invention) However, in such conventional recording devices, the winding side 0hIilIl to which the driving gear is fixed is on the film winding side, and the winding side to which the driving gear is attached via a spring is the winding side of the film. When the shaft side is the film feeding side, appropriate tension is generated on the film and high quality printing is possible, but when the winding direction is opposite to the above, the film is driven via the mainspring. If the take-up shaft side to which the gear is attached becomes the take-up side, the driving force transmitted to the drive gear will fluctuate, making the film tension unstable and causing a problem in which printing quality will deteriorate. Ta.

This invention was created in view of the above-mentioned circumstances.
The purpose of the present invention is to provide a recording device that improves the quality of printed characters, etc. recorded.

(Means for Solving the Problem) In order to achieve this object, the present invention includes a thermal head equipped with a heating element at the tip, and a thermal head that is in close contact with the thermal head and has both ends fixed to two winding shafts. a thin film member that moves back and forth between two take-up shafts and has a large number of ink holding parts, and the ink holding part of the thin film member is selectively heated by the heat generating element, and the ink is heated by the pressure of the bubbles generated. In a recording device that performs recording by ejecting ink held in a holding portion toward a recording member, a take-up shaft is provided on the take-up shaft side that is the feeding side of the thin film member among the two take-up shafts. A biasing member is provided to bias the side in a direction opposite to the feeding direction of the thin film member.

(Function) With this configuration, an appropriate tension is always applied to the thin film member no matter which direction the thin film member is moved back and forth, and the quality of recorded prints, etc. is improved.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

First, the recording principle of the recording apparatus in this embodiment will be explained. FIG. 1 is an explanatory diagram of the recording principle of the recording apparatus. In FIG. 1, ink 5 is applied to a film 3 as a thin film member made of metal or heat-resistant synthetic resin, in which a large number of micropores 1 with a diameter of 10 to 200 uIIl are formed as ink holding portions, and the ink is filled in the micropores 1. Fill 5.

When the microhole 1 reaches the heating element 9 disposed in the thermal head 7, a voltage is applied to the heating element 9 to generate a burst of heat, rapidly heating the ink 5 filled in the microhole 1. The pressure of the generated bubbles causes ink droplets 11 to be ejected to perform recording on recording paper as a recording member.

FIG. 2 is an overall side view of the recording device 13 in this embodiment. In FIG. 2, a recording table 13 is a cassette storage section 21 of a cassette 19 in which recording paper 17 as a recording member is stored in a box-shaped base 15. A transport unit 23 that transports the recording paper 17; a recording unit 25 that records printing etc. on the recording paper 17; and a paper discharge unit 27 that discharges the recording paper 17.
It is composed of etc.

To explain the cassette storage section 21, the cassette 19
is inserted from the upper right side of the recording device 13 along the inclined guide 29, and the bottom portion of the guide 29, which is the receiver, is attached to the portion 29A. The presence or absence of one cassette is detected by a cassette detection sensor 31 attached to the rear side of the inclined portion of the guide 29 at approximately the center, and the presence or absence of recording paper 17 is detected by a paper detection sensor (not shown).

The conveying section 23 that conveys the recording paper 17 will be explained.

A paper feed motor (not shown) is driven by a recording command from a control 11 (not shown) connected to the recording device 13;
The paper feed roller 33 rotates to feed the recording paper 17 into the cassette 19.
Feed more paper. The fed recording paper 17 is placed in the paper feed guide 3
5.37, the leading edge of the recording paper 17 reaches the rolling contact portion between the upper aligning roller 39 and the lower aligning roller 41.

The recording paper 17 hits the rolling contact portion between the aligning roller 39 and the lower aligning roller 41 and is aligned. After a certain period of time has passed after the start of paper feeding, the upper aligning roller 3
9 and the lower aligning roller 41 start rotating to nip and convey the recording paper 17.

Next, the recording section 25 and paper ejection section 27 of the recording device 13 will be explained. 3 is an enlarged side sectional view of the portion indicated by the arrow m in FIG. 2, and FIG. 4 is a side view of the upper frame of FIG. 3. In FIG. 3, the recording section guide 43.45
and the head roller 47 is the upper aligning roller 39
The arm 49 is attached to an arm 49 that is rotatable about the fulcrum. Furthermore, kite rollers 50 are attached to both ends of the head roller 47, as shown in FIG. A recording unit guide member 51 made of a thin stainless steel plate with a thickness of 0.1 to 0.21111 is attached to the upper surface of the recording unit guide 45, and the tip of the recording guide member 51 is in constant pressure contact with the head roller 47. are doing.

A square hole 53 is formed in the arm 49.
3, a camshaft 55 passes through it.

As shown in FIG. 4, five rings each having a bottle 57 are fixed to one end of the camshaft 55.
9 rotates integrally with the camshaft 55. The link 61 is rotatably supported by the shaft of a rotary damper 65 fixed to the upper frame 63.
The bottle 57 fits into a notch 67 formed at the lower end of the holder. A tension spring 73 is elastically mounted between a notch 69 provided at the other end of the link 61 and a protrusion 71 provided at the top of the upper frame 63.

Furthermore, one end of a link 75 extending leftward in FIG.
It is connected to a plunger 81 of a solenoid 79 fixed to the. Furthermore, a tension spring 85 is elastically mounted between the arm 49 and the protrusion 83 of the upper frame 63.

The rotation mechanism of the arm 49 will be explained. Figure 6 (a
> is a state diagram when the arm 49 is in the upward position H, Fig. 6 (
b) is a state diagram when the arm 49 is positioned below.

When not recording, as shown in Figure 6 (a), the arm 4
9 is located above, and the gap between the film 3, which is in close contact with the heat generating element 9 of the thermal head 7, and the head roller 47 is maintained at G1, as shown in FIG. 6(a). The recording paper 17 is guided by the recording unit guides 43 and 45, and the leading edge of the recording paper 17 touches the head roller 47 and the recording guide member 5.
Further, the gap between the film 3 and the head roller 47 is maintained at G1 until the recording paper 17 passes the tip of the recording section guide member 51. In this embodiment, the gap G1 is approximately 0.75 mm.

The leading edge of the recording paper 17 passes the leading edge of the recording unit guide member 51, and after a certain period of time passes, the solenoid 7 shown in FIG.
A voltage is applied to 9 to excite it. The solenoid 79 moves the plunger 81 to the left in FIG. 4, and the link 75 also moves in the same direction in FIG. The link 61 rotates clockwise around the support shaft against the tension of the tension spring 73, and the bottle 57 rotates counterclockwise together with the ring 59.

Therefore, the camshaft 55 that rotates integrally with the ring 59 also rotates counterclockwise, and as shown in FIG. 6(b), the four arms rotate counterclockwise with the upper aligning roller 39 as a fulcrum. Rotate in the same direction and move downward.

At this time, as shown in FIG. 5, guide rollers 50 attached to both ends of the head roller 47 move the thermal head 7
The gap between the recording paper 17 and the film 3, which are in contact with both ends of the recording paper 17 and conveyed between the head roller 47 and the recording section guide member 51, is kept constant (G2) as shown in FIG. Here, G2 is set to 0.2 ml. Further, the outer periphery of the camshaft 55 is separated from one side of the square hole 53. After this, recording on the recording paper 17 is started.

On the other hand, the thermal head 7 has a heating element 9 on the thermal head 7, as shown in FIGS.
The guide roller 5 is on the same plane as the horizontal plane containing the guide roller 5.
It has both end portions B and C that are in contact with each other, and a central portion A that makes an acute angle of θ° with the horizontal plane. Since the film 3 moves in the central portion A, the film 3 and the heat generating element 9 are in complete contact with each other, and the boundaries between the central portion A and the end portions B and between the central portion A and the end portions C are stepped. Therefore, the film 3 is less likely to meander.

After the recording on the recording paper 17 is completed and a certain period of time has elapsed, the fourth
The voltage application to the solenoid 79 shown in the figure is stopped. The link 61 rotates counterclockwise around the support shaft under the tension of the tension spring 73, causing the bin 57 to rotate clockwise in FIG. 4, thereby causing the ring 59 to rotate clockwise.

Therefore, the camshaft 55 also rotates clockwise, the outer periphery of the camshaft 55 comes into contact with one side of the square hole 53, and the arm 49 rotates clockwise about the upper aligning roller 39 as a fulcrum, as shown in FIG. As shown in (a), the arm 49 is again in the upper position. At this time, link 61
is subjected to viscous resistance by the rotary damper 65, thereby preventing rapid rotation.

The paper discharge section 27 of the recording device 13 will be explained.

In FIG. 6(b), the recording paper 17 that has passed the tip of the recording section guide member 51 is moved to the paper discharge guide 8 shown in FIG.
You will be directed to 7.89. As shown in Figure 6(a),
The tip of the paper ejection guide 87 is bent upward from the horizontal direction by an angle α, and the gap between the paper ejection guide 87 and the film 3 is set to R as shown in FIGS. has been done.

In this example, α is 10-45° and R is R>G
It is set to 1.

With the above configuration, the leading edge of the recording paper 17 will not enter above the gap between the leading edge of the paper ejection guide 87 and the head roller 47, and the recording paper 17 will be reliably guided by the paper ejection guides 87 and 89. That will happen.

A large number of small holes (not shown) are formed in the paper ejection guide 89, and the paper ejection guide 89 is fixed to the upper part of the duct rotating section 91. The duct rotating portion 91 is rotatably supported by the duct body 93 using a pivot 95 as a fulcrum. The duct rotating portion 91 is fixed by pressing its bottom portion against the right side inclined portion of the duct body 93. Duct body 9
3 is fixed to the upper surface of a blower 97, and the blower 97 is fixed to a lower frame 99.

As shown in FIG. 3, the paper ejection path includes a first upper pinch roller 101, a first lower pinch roller (not shown), a second upper pinch roller 103, and a second upper pinch roller (not shown).
A lower pinch roller is provided, which pinches and conveys one side of the non-recording portion of several 11 m long on both sides of the recording paper 17.

When the fan 105 provided in the lower part of the blower 97 rotates, air flows in through the right opening of the blower 97 and flows out through the upper opening of the blower 97.

Air flows into the duct body 93 from the lower opening of the duct body 93, and part of the air is blown to the upper part of the duct body 93, and part of it is blown to the upper part of the duct rotation part 91. The air blown to the upper part of the duct rotation part 91 flows out from a small hole (not shown) formed in the paper discharge guide 89. A paper ejection guide 107 having a large number of small holes is fixed to the upper part of the duct body 93. More leakage.

The recording paper 17 that has passed the tip of the recording section guide member 51 is conveyed while being pressed against the paper discharge guide 87 by the pressure of the air flowing out from the small hole of the paper discharge guide 89, and the recording paper 17 is recorded by this discharged air. Characters etc. recorded with ink on the paper 17 dry quickly. At the same time, the non-recording portion of the recording paper 17 is held between a first upper pinch roller 101 and a first lower pinch roller (not shown), and then a second upper pinch roller 103 and a second lower pinch roller (not shown).
It is held and conveyed by the lower pinch row.

Further, the recording paper 17 is guided by a paper discharge guide 87, 107, and is held between an upper paper discharge roller 109 and a lower paper discharge roller 111, and is mounted on the left side of the recording device 13 shown in FIG. The paper is ejected to the paper ejection tray 113.

FIG. 12 is a perspective view of the paper discharge section 27 of the recording device 13;
The figure is an outline drawing of a star-shaped plate, which will be described later.

As shown in FIG. 13, the lower paper discharge roller 111 has a star-shaped plate 117 formed with a protrusion 115 at a pitch angle β and an acute angle γ at its tip, and a star-shaped plate 117 formed at an appropriate interval as shown in FIG. It is composed of a collar 119 whose neck is arranged in the same direction, and two reference rollers 121 which roll into contact with the upper paper ejection roller 109. Since the recording surface of the recording paper 17 is supported in a dotted manner by the star-shaped plate 117, undried characters and the like on the recording paper 17 are prevented from being disturbed.

As shown in Fig. 2 and Fig. 3, the upper paper ejection port ~109
Immediately before the lower paper ejection roller 111, an upper frame 63
A paper ejection switch 123 is mounted on the paper ejection switch 123, which detects the leading and trailing edges of the recording paper 17 and confirms whether the recording paper 17 has been reliably ejected to the paper ejection tray 113 shown in FIG. .

The drive system of the recording section 25 and paper ejection section 27 of the recording device 13 will be explained.

FIG. 14 shows the recording section 25 and paper ejection section 27 of the recording device 13.
FIG. 15 is a front view of the drive system in FIG. 14. In Figures 14 and 15, upper aligning roller gear 125 is connected to pulley 131 via gears 127, 129. The boot 9131 has a rough belt 133, a pulley 135. It is connected to a recording paper transport motor gear 141 via a pulley 137 and a belt 139, and transmits the driving force of the recording paper transport motor 143.

The head roller pulley 145 is connected via a belt 147 to a first upper aligning roller pulley 149 coaxial with the upper aligning roller gear 125 . The first upper pinch roller pulley 151 is connected via a belt 153 to a second upper aligning roller pulley 155 coaxial with the first upper aligning roller pulley 149 . The second pinch roller gear 157 is connected via a gear 159 to a first upper pinch roller gear 161 coaxial with the first upper pinch roller 9151. Further, the upper paper discharge roller gear 163 is connected to the second pinch roller gear 157 via a gear 165.

In the drive system having the above configuration, the above-mentioned upper aligning roller 39. Head roller 47. First upper pinch roller 1
01. The second upper pinch roller 103 and the upper paper ejection roller 109 rotate in synchronization in the same direction and at the same rotation speed when the recording paper transport motor 143 starts driving.

The installation condition of the thermal head 7 will be explained below. 1st
6 is a plan view of the mounting section of the thermal head 7, and FIG. 17 is a bottom view of FIG. 16.

16 and 17, the thermal head 7 is fixed by two holder members 167 provided at both upper ends in FIG. 16 (the upper end is not shown in the figure). Furthermore, each of the holder parts 167 of 21!7j is 2
It is connected to a block member 173 that is positioned and fixed to the lower frame 99 of the recording device 13 via two fixing screws 169 and two adjusting screws 171. A compression spring 175 is interposed in the adjustment screw 171.

Therefore, when the fixing screw 169 is loosened, the holder member 167 is supported by the two compression springs 175 wound around the adjusting screw 171, and by turning the four adjusting screws 171 at both ends, Thermal head 7
The height and inclination of the will be adjusted. After completing the position adjustment of the thermal head 7, remove the four fixing screws 1.
By tightening the six screws, the holder member 167 is almost completely fixed to the block member 173.

Let's explain about cartridges.

Figure 18 shows cartridge 1 when installed in recording device 13.
77 is a plan view. The cartridge 177 is the recording section 25
．． It is composed of an ink supply section 179 and a drive section 181.

To attach the cartridge 177 to the recording device 13, first, as shown in FIGS. 2, 3, and 4, the upper rotary catch 183 fixed to the upper frame 63
and the lower port fixed to the lower frame 99 - tally catch 1
85 is released. Next, the upper frame 63 is rotated clockwise about the upper aligning roller 39 to open the recording section 25 and paper ejection section 27 of the recording device 13.

Next, the duct rotating section 91 is rotated counterclockwise about the pivot 95, and the cartridge 177 shown in FIG. 18 is inserted from above the recording section 25 for recording 1!13. At this time, as shown in FIG.
The four feet 191 of the cartridge 177 are fitted into the four square holes 189 formed in the base 187, and the cartridge 177 is placed on the base 187. As shown in FIG. 18, by moving the lever 193 on the base 187 side in the direction of the arrow, the plate 195 moves integrally with the lever 193.
The cartridge 177 is moved to the right in FIG. 3 on the base 187 until it comes into contact with the two left feet 191 in FIG. And the two feet on the right 1
When the cartridge 91 comes into contact with one side of the two right square holes 189, the cartridge 177 is fixed to the base 187.

After fixing the cartridge 177, the duct rotating part 91 is rotated clockwise to be fixed to the duct main body 93, and the upper frame 63 is rotated counterclockwise to connect the upper rotary catch 183 and the lower mouth. -Tally catch 185
Push down until they are engaged. Through the above operations, the cartridge 177 is attached to the recording device 13. To remove the cartridge 177 from the recording section 13, the above operations may be performed in reverse order.

FIG. 19 is a sectional view of the recording section 25 of the cartridge 177, FIG. 20 is an outline view of the film 3, and FIG. 21 is an enlarged view of the area in which the micropores 1 of the film 3 are formed.

The film 3 is made of, for example, 10 to 30 μm thick nickel, copper, or other residual pressure, or a synthetic resin such as polyamide resin, or a multilayer stack of these. As shown in FIG. 20, the micropore forming area 197 as the ink holding part forming area of the film 3 has pores with a diameter of 20 to 30 mm.
Micro holes 1 with a diameter of 0 μm and a hole pitch of 40 to 50 μm are formed as shown in FIG.

The micropore forming area 197 includes a central area excluding the N and M areas on both sides (in the direction of movement of the film 3 in the direction of the arrow in FIG. 20), and R and S areas at both ends in the direction perpendicular to the movement direction. This is the part surrounded by the S area except for the S area.

The film 3 is attached at one end in the moving direction to the left film shaft 199 and at the other end to the right film shaft 201.
1, the film 3 is wound up and moved a. The total length (N++M) of the film 3 shown in FIG. 20 in the longitudinal direction is shorter than the central portion A of the thermal head 7 shown in FIG. Also. The guide roller 50 attached to the head roller 47 is connected to the thermal head 7.
Since the upper ends B and C are in contact with each other, the gap between the recording paper 17 and the film 3 is always maintained uniformly over the longitudinal direction of the heating element 9.

On both sides of the thermal head 7, ink rollers 202 are rotatably provided as ink applying members that contact the lower surface of the film 3 and apply ink to the film 3.

The ink roller 202 is made of Teflon felt, foamed nitrile rubber, foamed polyvinyl resin, etc., which have good water absorption and coating properties.

When the cartridge 177 is not attached, the film 3 is in pressure contact with the left curved surface portion 205 and the right curved surface portion 207 of the container 203. When installing the cartridge 177, the film 3
is guided by the left curved surface portion 205 and right curved surface portion 207, and is pressed against the surface of the heating element 9 of the thermal head. The sealing members 213 and 215 are made of water-resistant rubber such as styrene-butadiene rubber or nitrile rubber, and one end thereof is fixed to the container 203, and the other end is an edge portion of the film 3.
It has come into contact with.

Further, at the side end of the recording section 25 of the cartridge 177, sealing members 213 and 215 are fixed to the upper part of the container 203, and the cartridge 177 at the side end
Ensures airtightness.

Therefore, the ink 5 will not spill or evaporate from the side edges.

The pressure urging mechanism 217 that applies pressure to the seal members 213 and 215 will be described.

The pressure biasing mechanism 217 is composed of plates 219, 221.degree. leaf springs 223.225 and rotating plates 227.degree. 229. Plate 219.221 has a thickness of 0.1
It is a thin plate made of stainless steel or the like having an elasticity of ~0.41 Ill, one end of which is fixed to the rotating plate 227, 229, and the other end of which is pressed against the sealing member 213, 215. Leaf spring 223.225 has a thickness of 0.1 to 0.4II
It is made of a thin plate made of stainless steel or the like having an elasticity of I11, and one end surface thereof is fixed to the rotating plate 227, 229, and the other end surface is pressed against the side wall of the container 203.

The pivot plates 227, 229 are attached to the container 20 by means of a collar 231 and a screw 233, as shown in FIG.
3 is rotatably supported.

Further, as shown in FIG. 19, the outer peripheries of the left camshaft 235° and the right camshaft 237, which are rotatably supported by the lower frame 99 of the recording device 13, are in contact with the rotating plates 227 and 229. It has become.

When the cartridge 177 is not attached or when recording is not performed, the outer peripheries of the left camshaft 235 and the right camshaft 237 do not come into contact with the rotating plates 227.229, so the pressure of the leaf springs 223.225 causes the rotating plates 227.
229 rotates in six directions in FIG. 19, plate 219.221 applies pressure to seal member 213.215.

This allows the sealing members 213 and 215 to
The left curved surface portion 205 and the right curved surface portion 2 of the container 203 via
07, the cartridge 177 is almost completely sealed to prevent ink from spilling or evaporating.

On the other hand, during recording, as shown in FIG.
The rotating plate 227, 229
By rotating in the direction B shown in the figure, the pressure on the seal members 213, 215 by the plates 219, 221 is released. As a result, the sealing member 213 contacts the film 3 at its edge portion 215, and excess ink 5 adhering to the film 3 is scraped off.

Regarding the drive unit 181 of the cartridge 177, FIG.
This will be explained using FIGS. 22 and 23.

The left film shaft 199 has drive gears 239 and 241 as power transmission means, and the right film shaft 20
1 is also provided with drive gears 243 and 245, respectively. A pair of drive mechanisms is constituted by the mutually opposing drive gears of each film shaft 199, 201, that is, 23 drive gears and the drive gear 243, and the drive gear 2
41 and the drive gear 245 constitute a pair of drive structures for the pond. As shown in FIG. 23, an idle gear 249 that meshes with each of the drive gears 239 and 243 is mounted on the lower idle shaft 247 between the pair of drive gears 23 and 243. Similarly, the idle shaft 247 has an idle gear 2 that meshes with a pair of driving gears 241 and 245.
51 is installed.

Drive gear 241 of left film shaft 199 and drive gear 243 of right film shaft 201 are both fixed to each film shaft 199,201.

The drive gear 239 of the left film shaft 199 is the 23rd
It is biased counterclockwise by a spring serving as a biasing member (not shown) having biasing force in the counterclockwise direction in the figure.

As a result, the film 3 attached at both ends to each film shaft 199, 201 is driven by the drive gear 239ffllll.
, and tension is generated in the film 3 between the two film shafts 199 and 201. Therefore, this drive gear 2
39 and the drive gear 243, the right film shaft 201 side on which the fixed drive gear 243 is attached is the winding side of the film 3, and the left film shaft 199 side is the feeding side of the film 3. .

On the other hand, the drive gear 245 of the right film shaft 201 is biased clockwise in FIG. 23 by a spring serving as a biasing member (not shown) having a clockwise biasing force.

As a result, the film 3 whose both ends are attached to each film shaft 199.201 is pulled toward the drive gear 245, and tension is generated in the film 3 between both film shafts 199.201. Therefore, in the drive groove formed by the drive gear 245 and the drive gear 241, the left film shaft 19 side on which the fixed drive gear 241 is attached becomes the film 3 winding side, and the right film shaft 201 The side becomes the feeding side of the film 3.

As shown in FIG. 22, a drive shaft 253 to which power is transmitted from a drive motor (not shown) is disposed below the idle shaft 247, and a latch gear 255 is fixed to the drive shaft 253 so as to be movable in the axial direction. . The clutch gear 255 is biased to the left in FIG. 22 by a spring 257 elastically mounted between the clutch gear 255 and the container 203 side, and a tip 259 of the clutch 259 on the opposite side of the spring 257 of the clutch gear 255.
a is in contact with it. The clutch 259 has its base 259b
This rotation causes the clutch gear 255 to move on the drive shaft 253 and connect to the idle gear 24.
9 and the idle gear 251.

Note that in order to generate tension in the film 3, when assembling the cartridge 177, the left film shaft 199 must be
Drive gear 2 fixed to (right film shaft 201)
41 (driving gear 243), rotate the driving gear 245 (driving gear 239), which is biased by the mainspring, in the direction that applies tension to the film 3 to fit the mainspring in the winding direction. Gear 251 (idle gear 249) is attached to idle shaft 247.

In the drive unit 181 as described above, the clutch gear 25
5 is engaged with the idle gear 251, the clutch gear 255 is rotated counterclockwise in FIG. Rotate counterclockwise in the same figure. This allows film 3
The film 3 is wound on the fixed drive gear 241 side, while the tension of the film 3 is maintained because the feed side is on the drive gear 245 side provided with the mainspring. On the other hand, when the clutch gear 255 is engaged with the idle gear 249, the film 3 is wound onto the fixed driving gear 243 by rotating the clutch gear 255 in the opposite direction.
Since the feeding side is the drive gear 239 side provided with the mainspring, the tension of the film 3 is maintained.

In this way, the proper tension is always applied to the film 3 no matter which direction the film 3 moves back and forth, resulting in 9 products! 1 can be printed.

[Effects of the Invention] As described above, according to the present invention, of the two winding shafts to which both ends of the thin film member having the ink holding portion are attached, this winding shaft is placed on the winding shaft side which is the feeding side of the thin film member. Since a biasing member is provided that biases the shaft side in the opposite direction to the direction in which the thin film member is fed, the thin film member is always maintained at an appropriate tension when moving in either direction, and as a result, the thin film member and the thermal head are This improves the adhesion between the two and enables high-quality recording.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram for explaining the recording principle, Fig. 2 is a side view of a recording device showing an embodiment of the present invention, and Fig. 3 is an enlarged side view of the part indicated by the ■ arrow in Fig. 2. 4 is a side view of the upper frame of the recording device in FIG. 3;
Fig. 5 is an explanatory diagram showing the positional relationship between the thermal head and the guide roller, Fig. 6 (a) is a diagram of the non-recording state with the arm positioned upward, and Fig. 6 (b) is a diagram showing the state when the arm is positioned downward. 7 is an explanatory diagram showing the gap between the recording paper and the film during recording, FIG. 8 is a front view of the thermal head, FIG. 9 is a left side view of FIG. 8, and FIG. Figure 10 is a detailed view of the thermal head, Figure 11 is a perspective view of the film and ink roller, Figure 12 is a perspective view of the paper discharge section of the recording device,
Fig. 13 is an external view of the star-shaped plate, Fig. 14 is a front view of the drive system in the recording section and paper ejection section of the recording device, and
Figure 5 is a plan view of Figure 14, Figure 16 is a plan view of the thermal head installation section, Figure 17 is a bottom view of Figure 16, and Figure 17 is a bottom view of Figure 16.
8 is a plan view of the cartridge, FIG. 19 is a sectional view of the recording section of the cartridge, FIG. 20 is a perspective view showing the micropore forming area of the film, FIG. 21 is an enlarged view of the micropore forming area of the film, and FIG. Figure 22 is a front view of the cartridge drive unit;
FIG. 23 is a left side view of FIG. 22. 1... Micropore (ink holding part) 3... Film (thin film member) 7... Thermal head

Claims (2)

[Claims] (1) A thermal head equipped with a heating element at the tip, and a large number of ink holding parts that are in close contact with this thermal head and fixed at both ends to two take-up shafts and move back and forth between the two take-up shafts. a thin film member, the ink held in the ink holding part is ejected toward the recording member by the pressure of bubbles generated by selectively heating the ink holding part of the thin film member by the heating element, and recording. In the recording device, a biasing member is provided on the winding shaft side, which is the feeding side of the thin film member, of the two winding shafts, for urging the winding shaft side in a direction opposite to the feeding direction of the thin film member. A recording device characterized in that: (2) Each of the two winding shafts is provided with two power transmission means that receive power from the outside, one of the two provided on each winding shaft is fixed to the winding shaft, and each of the other one is fixed to the winding shaft. one of the winding shafts is attached to the winding shaft via a biasing member that biases in a direction opposite to the feeding direction when the thin film member is on the feeding side, and the fixed power transmission means of the one winding shaft and 2. The recording apparatus according to claim 1, wherein a pair of drive mechanisms includes a power transmission means attached to the other winding shaft via a biasing member.