JP2003211801A - Ink ribbon detection unit and printer using the unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink ribbon detection unit of a simple structure which does not require a special reflector for detecting the residue of an ink ribbon and is capable of detecting the residue without an error. <P>SOLUTION: The ink ribbon detection unit comprises a ribbon core 25 with a through hole 25a opened in the center, a flange 27 provided at one end part of the ribbon core 25 and an ink ribbon 15 which is wound around the outer peripheral face of the ribbon core 25 and fed by the rotation of the ribbon core 25. In addition, a magnetic seal 35 containing units of magnetic information 35a arranged at an equal pitch is provided on one face of the flange 27. On the other hand, a bobbin 32 is mounted, in a freely rotatable manner, on a printer body 11 and a magnetic sensor 40 is fitted to the printer body 11 near the bobbin 32. Thus the ink ribbon 15 is fed by rotating the ribbon core 25 with the driving help of the bobbin 32 and the magnetic information 35a of the magnetic seal 35 is detected by the magnetic sensor 40. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink ribbon detection unit and a printer device using the same, and more particularly,
The present invention relates to an ink ribbon detection unit capable of magnetically reading the remaining amount of an ink ribbon and the like, and a printer device using the same.

[0002]

2. Description of the Related Art Conventionally, a thermal transfer type printer apparatus has been used in which a thermal head is pressed against a platen via a sheet and an ink ribbon to perform print recording.
In such a printer device, when printing and recording on a paper having a surface roughness such as bond paper, it is necessary to press the thermal head against the paper on the platen roller with a strong press contact pressure. There is a limit to pressure due to its precise structure. Then, the ink layer of the ink ribbon is selectively melted by the heat of the thermal head and transferred to the intermediate transfer body to form a primary recording image on the intermediate transfer body, and then the primary recording on the intermediate transfer body is performed. 2. Description of the Related Art An intermediate transfer type printer device is used in which an image is recorded by retransferring an image onto a sheet that is pressed by a strong pressure contact force of a retransfer pressure roller.

FIG. 6 shows an enlarged cross-sectional view of a main portion of a delivery ribbon core portion in a conventional intermediate transfer type printer device. As shown in FIG. 6, a sending drive unit 52 connected to a drive source such as a stepping motor is provided in the printer body 51. A delivery bobbin 54 is attached to the tip of the rotary shaft 52a of the drive unit 52. A disc-shaped reflecting plate 56 is attached to the rear surface side (lower side in FIG. 6) of the rotating shaft 52a.

FIG. 7 is a perspective view of the delivery bobbin 54. The delivery bobbin 54 is made of a resin member formed in a substantially cylindrical shape, and is composed of an inner cylinder portion 54a and an outer cylinder portion 54b arranged on the outer periphery of the inner cylinder portion 54a. The inner peripheral surface of the inner tubular portion 54a is fitted to the rotary shaft 52a of the delivery driving portion 52. The outer cylinder portion 54b has a plurality of engaging claws (engagement portions) arranged on the outer peripheral surface at equal intervals in the circumferential direction.
The protrusion 58 is formed. A coil spring 60 (see FIG. 6) is attached to the lower end side of the outer tubular portion 54b, and the coil spring 60 elastically biases the outer tubular portion 54b upward with respect to the inner tubular portion 54a. There is.
The winding bobbin (not shown) of the printer device has substantially the same shape as the delivery bobbin 54, and is rotatably arranged on the printer body 51.

As shown in FIG. 8, the reflection plate 56 is made of metal, and its surface reflects light. A plurality of U grooves 56a, which are notched in a U shape at equal intervals, are formed on the outer peripheral edge of the reflection plate 56. Further, as shown in FIG. 6, a reflection type photo sensor 65 is arranged in the printer body 51 so as to face the reflection plate 56.

As shown in FIG. 6, the ink ribbon cassette 70 has a cassette ribbon 72 in which a delivery ribbon core 74 and a winding ribbon core (not shown) are rotatably supported. The delivery ribbon core 74 is formed in a substantially cylindrical shape and has a through hole 74a in the center thereof. A wide ink ribbon 76 is wound around the outer peripheral surface of the ribbon core 74. The winding ribbon core (not shown) has substantially the same shape as the feeding ribbon core 74.

When the ink ribbon cassette 70 is placed on the printer body 51, the delivery bobbin 54 is in the through hole 74a of the delivery ribbon core 74, and the take-up bobbin is in the through hole of the take-up ribbon core. It has been inserted.

Next, the operation of printing and recording in the conventional printer apparatus will be described. First, the thermal head is moved to expose the outside from the cassette case 72 through the ink ribbon 76 and the intermediate transfer body, which are not shown. It is pressed against the platen roller (intermediate transfer roller). By selectively heating a plurality of heating elements of the thermal head, the ink layer of the ink ribbon 76 is transferred onto the intermediate transfer body as a primary recording image.

Thereafter, the intermediate transfer member wound around the platen roller is conveyed and the ink ribbon 76 is
Is also conveyed at a predetermined speed by frictional driving with the intermediate transfer member. One end of the conveyed ink ribbon 76 is wound around the winding ribbon core inserted through the winding bobbin. At this time, the take-up speed changes depending on the size of the take-up radius which is the transport amount of the ink ribbon 76 wound around the take-up ribbon core, and the take-up ribbon core 74 changes in accordance with the change in the take-up speed. The delivery speed of will also change.

Then, the remaining amount of the ink ribbon 76 wound around the delivery ribbon core 74 is determined by the delivery ribbon core 74.
The light is emitted from the photosensor 65 to the reflecting plate 56 that is rotated together with the reflecting plate 56, so that the light is reflected
The photo sensor 65 detects the case where the light is reflected back at 6 and returns, and the case where the U groove 56a causes non-reflection.

An ink ribbon 76 is attached to the delivery ribbon core 74.
, The winding radius is large, so the winding speed is slow, but as the number of ink ribbons 74 remaining on the delivery ribbon core 74 decreases, the winding radius decreases. With this, the rotational speed (linear speed) of the delivery ribbon core gradually increases. Therefore, in the conventional printer device, the photo sensor 65 reads the timing of the reflected light from the reflection plate 56, generates a pulse signal generated by reflection and non-reflection, and based on the temporal change of the pulse signal, the ribbon ribbon for delivery. The remaining amount of the ink ribbon 76 wound around 74 has been determined.

The intermediate transfer member to which the ink layer has been primarily transferred is heated to a temperature optimum for retransfer by a heater (not shown), and the primary recording image on the intermediate transfer member is brought into pressure contact with a pressure roller (not shown). Is re-transferred onto paper or a card, and the above operation is repeated to complete print recording.

When the remaining amount of the ink ribbon on the feeding ribbon core 74 is almost exhausted during the printing and recording, according to the rotation speed of the winding ribbon core,
The photo sensor 65 detects that the rotation speed of the delivery ribbon core 74 is high, and blinks an unillustrated display unit or the like to display the ink ribbon shortage.

[0014]

By the way, in the conventional printer device, the reflected light from the reflection plate 56 is detected by the photo sensor 6.
Since it is detected by No. 5, the reflection plate 56 for reflecting the emitted light and returning it to the photo sensor 65 is required, and there is a problem that the number of parts increases. In addition, if paper dust generated from the paper to be printed and recorded or dust entering from the outside adheres to the reflection plate 56 or light from the light emitting portion of the reflective photosensor 65 is absorbed by the dust or the like. However, there is a possibility that the photo sensor 65 cannot accurately read the change of the returning light from the reflecting plate 56 or the non-returning light from the U groove 56a. In particular, when this printer device is used for a long time, the lubricant (grease) used for another driving mechanism adheres in the U groove 56a of the reflection plate 56, and the photo sensor 65 causes the return light (pulse). Signal), and the remaining amount of the ink ribbon may not be accurately detected.

An object of the present invention is to achieve a simple structure that does not require a special reflector for detecting the remaining amount of the ink ribbon, can detect the remaining amount of the ink ribbon without error, and has a simple structure.

[0016]

At least one of the above-mentioned problems
As a first solution to solve the above problem, a cylindrical ribbon core having a through hole in the center, a flange provided at one end of the ribbon core, and a surface of the flange wound around the outer peripheral surface of the ribbon core. And an ink ribbon which is delivered by the rotation of the ribbon core, and a magnetic member on which magnetic information is arranged at a predetermined pitch interval is provided on the other surface of the flange, and the magnetic member is arranged to face the magnetic member. The magnetic information can be read by the magnetic sensor.

As a second solution, the magnetic member is a magnetic seal attached to the other surface of the flange.

As a third solution, the magnetic information has different pitch intervals depending on the type of ink ribbon.

As a fourth means for solving the problems, a cylindrical ribbon core having a through hole in the center, a flange provided at one end of the ribbon core, and an outer peripheral surface of the ribbon core are wound on one surface of the flange. An ink ribbon that is mounted and is sent out by rotation of the ribbon core is provided, and a magnetic member that arranges magnetic information at a predetermined pitch interval is provided on the other surface of the flange, and a bobbin is rotatably attached to the printer body. Provide a magnetic sensor to the printer body near the bobbin, and insert the ribbon core through hole into the bobbin,
The magnetic sensor is arranged opposite to the magnetic member, the ribbon core is rotated by the rotation of the bobbin to send out the ink ribbon, and the magnetic information of the magnetic member is detected by the magnetic sensor.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A printer apparatus according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic overall view of the printer device of this embodiment. FIG. 2 is an enlarged perspective view of a main part of a ribbon unit mounted in this printer device. FIG. 3 is an enlarged cross-sectional view of the main part of this ribbon unit. FIG. 4A is an enlarged bottom view of an essential part showing an example of the ribbon unit, and FIG. 4B is an enlarged bottom view of the essential part showing another example of the ribbon unit.

As shown in FIG. 1, a printer device 10 according to an embodiment of the present invention has a printer main body 11 in the center thereof.
A platen roller 12, which is a cylindrical transfer platen, is provided. The platen roller 12 has a rotary shaft 1
It has 2a and is capable of normal rotation and inversion. Above the platen roller 12 in the figure, the platen roller 12
An elongated line thermal head 14 extending in a direction parallel to the direction of the rotating shaft 12a is disposed so as to be able to contact.
A heating element is arranged in the line thermal head 14 within the dimension width of the print recording range so that the ink ribbon 15 described later can be selectively heated based on the print recording information.

Next, in the printer main body 11 on both the left and right sides of the line thermal head 14 in the figure, a feeding mechanism 16 and a winding mechanism 19 are provided as ink ribbon running mechanisms. As shown in FIG. 5, the delivery mechanism 16 includes a drive unit 52, a delivery drive shaft 52a protruding from the printer body 11, and a delivery bobbin 54 fitted to the roller drive shaft 52a. A delivery ribbon core 25, which will be described later, is inserted into the delivery bobbin 54 and is rotatable. A magnetic sensor 30 to be described later is provided in the printer body 11 near the delivery mechanism 16.

As shown in FIG. 1, the winding mechanism 19 includes:
A drive unit (not shown) similar to the delivery mechanism 16, a winding roller drive shaft (not shown) protruding from the upper surface of the printer body 11, and a winding bobbin 20 fitted to the roller drive shaft. Is equipped with. And bobbin 2 for winding
A winding ribbon core 24 is inserted and attached at 0 to wind up an ink ribbon 15 to be described later.

Next, the printer body 11 on the left side of the platen roller 12 in the figure is provided with a supply roller 32 and a take-up roller 34 as a mechanism for conveying the intermediate transfer member 40.
Here, the intermediate transfer member 40 is made of a resin sheet having elasticity, and both ends thereof are wound around the supply roller 32 and the winding roller 34. Then, a part of the intermediate transfer body 40 is configured such that the ink of the ink ribbon 15 is primarily transferred between the platen roller 12 and the line thermal head 14 according to the print record information.
The primary-transferred intermediate transfer body 40 is heated by a re-transfer (secondary transfer) mechanism 36 arranged between the platen roller 12 and the take-up roller 34 in the ink ribbon feeding direction by a heating device such as a heater. A predetermined print record is re-transferred (secondary transfer) to a recording medium (medium) 42 such as a card, and then wound by the rotation of the winding roller 34.

As shown in FIGS. 2 and 3, the ink ribbon unit 22 has a resin-made cylindrical delivery ribbon core 25 having a through hole 23 in the center, and the ribbon core 2
5 is provided with a flange 27 integrally provided at the lower end (one end) thereof. Further, the ink ribbon unit 22 is wound around the outer peripheral surface 25b of the ribbon core 25 and mounted on the upper surface (one surface) 27b of the flange 27.
Sheet-shaped ink ribbon 15 sent out by rotating
(See FIG. 3). Through hole 2 of ribbon core 25
Engaging portions 25d arranged at equal intervals in the circumferential direction are arranged in parallel to the axial direction on the inner peripheral surface 25c facing 3 and are formed so as to slightly project inward (see FIG. 2).

The width dimension of the ink ribbon 15 is almost the same as the width dimension of the recording medium 42 to be secondarily transferred, for example, a card, and Y (yellow) and M (magenta) are multi-colored depending on the application. , C (cyan), and K (black) are sequentially arranged in the lengthwise direction, so-called dagger ribbons, black and white K (black), and the like.

On the lower surface (other surface) 27c of the flange 27, an annular magnetic seal (magnetic member) 35 in which magnetic information 35a is arranged at a predetermined pitch is attached (FIG. 4A and FIG. 4A). See FIG. 4B). Here, the magnetic seal 35 is located at a facing position where the magnetic information 35a can be read by the magnetic sensor 30. In this way, the ink ribbon unit 22 is provided as an ink ribbon detection unit for detecting the remaining amount of the ink ribbon in the delivery ribbon core 25, and the magnetic seal 35 having the magnetic information 35a is provided on the lower surface 27c of the flange 27. The magnetic information 40 a can be read by the magnetic sensor 40 arranged to face the seal 35. The ink ribbon unit 2 in the present embodiment
In No. 2, a cassette case for accommodating the ink ribbon 15 is not used, but the ink ribbon 15 is exposed to the outside.

The magnetic seal 35 of the ink ribbon unit 22 shown in FIG. 4A is formed by winding the ink ribbon 15, which is a so-called dagger ribbon, around the delivery ribbon core 25. The magnetic seal 35 includes an annular base sheet 35b coated with an adhesive material on the back surface, and magnetic information on the front surface of the base sheet 35b whose central angles (θ1) are 40 degrees at equal pitches with respect to the center thereof. Nine 35a are arranged. The magnetic seal 35 is attached to the peripheral edge of the lower surface 27c of the flange 27 with an adhesive.

Next, in the magnetic seal 35 of the ink ribbon unit shown in FIG. 4B, the black ink ribbon 15 is wound around the delivery ribbon core 25. The structure of the magnetic seal 35 shown in FIG. 4B is the same as that of FIG. 4A, and the magnetic information is formed on the surface of the main body sheet 35b such that the central angle (θ2) is 20 degrees at equal pitches. Eighteen 35a are arranged. Then, the delivery ribbon core 25 having the magnetic seal 35 shown in FIGS. 4A and 4B is attached to the delivery bobbin 18, and the magnetic information 35a is obtained according to the rotational speeds of the delivery bobbin 18 and the ribbon core 25. The amount of ink ribbon 15 remaining on the ribbon core 25 and the type of the ink ribbon 14 are detected by reading at 40.

Next, the basic operation of the printer apparatus 10 of this embodiment regarding print recording will be described with reference to FIGS. 1 and 5. First, the platen roller 12 is rotated clockwise in FIG. 1 to convey the intermediate transfer body 40 by a predetermined amount, and the conveyed intermediate transfer body 40 is wound around the winding roller 34. At this time, the line thermal head 14 is separated from the platen roller 12. It should be noted that the delivery bobbin 54 and the winding bobbin 20 are respectively attached with the delivery ribbon core 25 and the winding ribbon core 24, which are wound with, for example, a dana ribbon, in advance through the through holes 23, respectively. Engaging claw 58
Are fitted to the engaging portions 25d of the ribbon cores 25 and 24.

At this time, by the insertion force of the delivery ribbon core 25, the outer cylinder portion 54b of the delivery bobbin 54 is moved to the printer main body 11 side once while being opposed to the elastic biasing force of the coil spring 60, and after insertion, the coil spring 60 is inserted. The outer urging force of the outer cylinder 54b returns to its original position so that it can be smoothly inserted.

Next, the ink ribbon 15 is wound around the winding ribbon core 24 so that the ink layer of a desired color is located between the platen roller 14 and the line thermal head 12 according to the print record information. While the ink ribbon 15
To transport. Subsequently, the line thermal head 14 moves toward the platen roller 12, presses the platen roller 12 through the ink ribbon 15, and selectively energizes a plurality of heating elements (not shown) of the line thermal head 14 by Ink of a predetermined color is transferred to the intermediate transfer body 40.

Subsequently, the line thermal head 14 is once separated from the platen roller, the winding ribbon core 24 is further rotated together with the winding bobbin 20, and the ink ribbon (dundler ribbon) 15 is wound up to obtain a color different from the above. The ink layer is placed between the platen roller 12 and the line thermal head 14. Then, as described above, the ink ribbon 15 and the intermediate transfer medium 40 are brought into pressure contact with the heated heating element of the line thermal head 14 to melt the ink of the desired color of the ink ribbon 15 and apply the same to the intermediate transfer body 40. Transfer to. By repeating such a print recording operation, the primary recording image is transferred to the intermediate transfer member 40.

After that, the intermediate transfer member 40 wound around the platen roller 12 is conveyed to the take-up roller 32 side. Then, the pressure roller (not shown) of the retransfer mechanism 36 presses the primary recording image on the intermediate transfer body 40 against the recording medium 42 such as paper or card. At the same time, the intermediate transfer body 40 is heated to a temperature optimum for retransfer by a heater (not shown), and the primary recording image on the intermediate transfer body is retransferred to the recording medium 42 such as paper or card. By repeating the above process, printing and recording on the recording medium 42 such as a predetermined paper or card is completed.

The ink ribbon 15 is conveyed by the intermediate transfer body 40 wound around the platen roller 12 and at a predetermined speed by frictional driving with the intermediate transfer body 40. One end of the conveyed ink ribbon 15 is
Winding ribbon core 24 inserted in winding bobbin 20
Will be wound up. The winding speed at this time varies depending on the size of the winding radius of the ink ribbon 14 wound around the winding ribbon core 24. Similarly, the delivery speed of the delivery ribbon core 25 also changes according to the change of the winding speed of the winding ribbon core 24.

The delivery speed (linear velocity) of the delivery ribbon core 25 is determined by the number of revolutions of the delivery ribbon core 25, that is, the magnetic seal 35 attached to the lower surface of the flange 27 in which the magnetic sensor 40 is integrated with the delivery ribbon core 25.
It is measured by reading the magnetic information 35a. Unlike the conventional case where light is emitted from the photo sensor 65 toward the reflecting plate 56 that is rotationally driven and the light is detected by the photo sensor 65, the magnetic sensor 40 has a detection accuracy due to dust or the like. Does not deteriorate.

Further, when the ink ribbon 15 is sufficiently left on the delivery ribbon core 25, the rotation speed of the ribbon core 25 is slow, but as the remaining ink ribbon 15 becomes smaller, the winding radius becomes smaller, so that the ribbon core 25 rotates. The speed is getting faster. Therefore, in the magnetic sensor 30, the period for reading the magnetic information 35a from the magnetic seal 35 per unit time becomes short, and the amount of change from the rotational speed at the initial stage of mounting the ink ribbon 15 (increased gradually). The remaining amount of the ink ribbon 76 is determined. When the amount of change reaches a value within a predetermined range with respect to the initial value, the magnetic sensor 30 detects that there is almost no remaining amount of the ribbon, and an error is displayed on a display unit (not shown).

When the ink ribbon 15 of the ink ribbon unit is, for example, a dagger ribbon (see FIG. 4A), an ON signal of a pulse signal is generated by nine pieces of recording information 35a each time the sending ribbon core 25 makes one rotation. Occur. When the magnetic sensor 30 detects the pulse signal amount, the printer device 10 determines the type of the ink ribbon of the delivery ribbon core 25 based on the recording information 35a for each type of the ink ribbon 15 as an initial value in advance.

When the ink ribbon 15 is black, the magnetic information 35a shown in FIG. 4B produces 18 ON signals of a pulse signal per one rotation. From the initial value,
The printer device 10 can determine that the ink ribbon 15 is black. In the magnetic sensor 30, when the remaining amount of the black ink ribbon 15 decreases, the rotation speed (linear speed) of the delivery ribbon core 25 increases in accordance with the winding diameter. It is needless to say that the remaining amount of the ink ribbon 15 is detected by measuring with a magnetic sensor.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the spirit of the invention. For example, by storing specific magnetic information in advance as the magnetic information 35a of the magnetic seal 35 attached to the lower surface 27c of the flange 27 at the time of manufacturing,
The magnetic sensor 30 makes it possible to distinguish the ink ribbon 15 from a third party that does not have the specific magnetic information. Therefore, in this printer device, since the quality-controlled genuine ink ribbon 15 is used, the remaining amount of ink ribbon and the type of ink ribbon can be detected more accurately, and various information can be stored in the magnetic seal 35. You can

[0041]

As described above, the ink ribbon detection unit of the present invention has a cylindrical ribbon core having a through hole in the center, a flange provided at one end of the ribbon core, and an outer peripheral surface of the ribbon core. Mounted on one surface of the flange and provided with an ink ribbon that is sent out by the rotation of the ribbon core, and the other surface of the flange,
A magnetic member having magnetic information arranged at a predetermined pitch is provided, and magnetic information can be read by a magnetic sensor arranged to face the magnetic member, so that paper dust generated from a recording medium to be printed or external Since it is detected by a magnetic method that does not affect dust entering from the
Since the erroneous detection is eliminated, the remaining amount of the ink ribbon can be accurately detected.

Further, since the magnetic member is a magnetic seal attached to the other surface of the flange, it can be easily attached,
Since the ribbon core can be used in common, it is sufficient to wind the ink ribbon around this ribbon core and then attach it each time according to its type, which can improve workability and the number of parts. Can be reduced.

Since the magnetic information has different pitch intervals depending on the type of the ink ribbon, not only the remaining amount of the ink ribbon with only one magnetic sensor and magnetic member, but also the type of the ink ribbon is only the pitch interval. Can be detected by a simple method.

Further, in the printer device of the present invention, a cylindrical ribbon core having a through hole in the center, a flange provided at one end of the ribbon core, and an outer peripheral surface of the ribbon core are wound and mounted on one surface of the flange. And an ink ribbon which is sent out by the rotation of the ribbon core, a magnetic member having magnetic information arranged at a predetermined pitch is provided on the other surface of the flange, and a bobbin is rotatably provided on the printer body. Attaching a magnetic sensor to the printer body near the bobbin, inserting the through hole of the ribbon core into the bobbin, disposing the magnetic sensor facing the magnetic member, and rotating the bobbin to rotate the ribbon core to send out the ink ribbon. Since the magnetic sensor detects the magnetic information of the magnetic member, a simple detector including the magnetic sensor and the magnetic member is provided. In conjunction with the residual amount of the ink ribbon can be accurately detected, it can be made to detect and also used the type of the ink ribbon. Further, since it is not affected by dust or the like from the outside, it is not necessary to store a ribbon cassette in the ink ribbon, and the ink ribbon can be used in an exposed state. Further, since there is no reflector as in the conventional case, a space for it is not required, and the printer body can be downsized.

[Brief description of drawings]

FIG. 1 is a schematic overall view of a printer apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of a ribbon unit mounted in the printer device according to the embodiment of the present invention.

3 is an enlarged cross-sectional view of a main part of the ribbon unit shown in FIG.

FIG. 4A is an enlarged bottom view of an essential part of an example of a ribbon unit, and FIG. 4B is an enlarged bottom view of an essential part of another example of a ribbon unit.

FIG. 5 is an explanatory diagram illustrating a detection method of the printer apparatus according to the embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a main part of a conventional printer device.

FIG. 7 is an enlarged perspective view of a main part of a conventional printer device.

FIG. 8 is an explanatory diagram showing a detection unit of a conventional printer device.

[Explanation of symbols]

11 Printer body 15 Ink ribbon 25 Ribbon core (ink ribbon core for delivery) 25a through hole 25b outer peripheral surface 27 flange 27b One surface of flange (upper surface) 27c Flange other surface (bottom surface) 32 bobbins (sending bobbins) 35 Magnetic member (magnetic seal) 35a Magnetic information 40 magnetic sensor

Claims (4)

[Claims] 1. A cylindrical ribbon core having a through hole in the center, a flange provided at one end of the ribbon core, and an outer peripheral surface of the ribbon core wound around and mounted on one surface of the flange. And an ink ribbon that is sent by rotation of the magnetic head, the other surface of the flange is provided with a magnetic member in which magnetic information is arranged at a predetermined pitch interval, and the magnetic sensor arranged to face the magnetic member An ink ribbon detection unit characterized by being able to read magnetic information. 2. The ink ribbon detection unit according to claim 1, wherein the magnetic member is a magnetic seal attached to the other surface of the flange. 3. The ink ribbon detection unit according to claim 1, wherein the magnetic information has different pitch intervals depending on the type of the ink ribbon. 4. A cylindrical ribbon core having a through hole in the center, a flange provided at one end of the ribbon core, and a ribbon core wound around the outer peripheral surface of the ribbon core and mounted on one surface of the flange. And an ink ribbon that is sent out by rotation of the printer, a magnetic member having magnetic information arranged at a predetermined pitch is provided on the other surface of the flange, and a bobbin is rotatably provided on the printer body. A magnetic sensor is attached to the printer body in the vicinity, the through hole of the ribbon core is inserted into the bobbin, the magnetic sensor is arranged to face the magnetic member, and the ribbon core is rotated by rotating the bobbin. A printer device, wherein the ink ribbon is sent out and the magnetic information of the magnetic member is detected by the magnetic sensor. .