KR100714804B1 - RFID Printer - Google Patents

Abstract

The present invention is to solve the above-mentioned problems of the prior art, to provide an RFID printer having a ribbon roll and RFID tag roll detection function, ribbon wrinkle prevention function, thermal head overheat prevention function and RFID data collision prevention function. It is done.

The RFID printer according to the present invention for achieving the above object, one end is attached to the RFID tag roll by the elastic member and the other end is rotatable to the RFID tag roller is equipped with a radio frequency identification (RFID) tag roll A fixed RFID tag roll detection bar is provided, and the other end of the RFID tag roll detection bar is provided with an RFID tag roll switch for generating an RFID tag roll exchange signal when the other end of the RFID tag roll detection bar is contacted. A printer module having a ribbon module to which two ribbon rollers are attached to restrict a ribbon movement, and a thermal head configured to print the RFID tag on an upper portion of the ribbon; An RFID unit including an operation antenna, a verification antenna, and an RFID reader board for recording object information on the RFID chip of the RFID tag at a position below the RFID tag and verifying the record data; And a controller for controlling the printer unit and the RFID unit.

RFID printer, RFID tag roll detection bar, ribbon detection bar, thermal head control unit, integrated RFID reader

Description

RFID printer {Radio frequency identification printer}

1 is a perspective view of a typical radio frequency identification (RFID) printer,

Figure 2a is a cross-sectional view of the radio frequency identification (RFID) printer of Figure 1,

Figure 2b is a functional block diagram of a radio frequency identification (RFID) printer of the prior art,

3 and 4 are cross-sectional views of an RFID (Radio frequency identification) printer having a ribbon detecting unit and an RFID tag roll detecting unit as an embodiment of the present invention.

5 is an exploded perspective view of the ribbon roll module,

6 is a functional block diagram of an operation antenna and a verification antenna and an RFID reader board according to an embodiment of the present invention having such an RFID data collision prevention function.

 7 is a functional block diagram of a control board having a thermal head control unit for performing a thermal head thermal protection function according to an embodiment of the present invention.

FIG. 8 is a circuit diagram according to an embodiment of the thermal head controller of FIG. 7.

Description of the main symbols in the drawings

100: printer unit

110: RFID tag roller 120: RFID tag roll

130: RFID tag 140: first ribbon roller

150: second ribbon roller 160: ribbon roll

170: ribbon 180: ribbon detection bar

190: thermal head

200: RFID unit

210: control board

211: printer control unit 213: thermal head control unit

220: RFID reader board

230: operation antenna 240: verification antenna

250: black marker sensor

The present invention relates to a radio frequency identification (RFID) printer, and more particularly, to a ribbon and a radio frequency identification (RFID) tag roll detection function, a ribbon wrinkle prevention function, a thermal head overheat prevention function, and an RFID data collision. It relates to a radio frequency identification (RFID) printer having a prevention function.

In general, a bar code has been widely used as a method for identifying an object, but with the recent development of RF technology, an RFID method stores object information on an RFID chip, attaches it to an object, and records and reads the object information from a remote place. Has been developed and used.

The bar code described above has object information conforming to the EPC or ISO standard, and enables the reader to recognize the object information by identifying the arrangement status of the bar code.

In the case of RFID (Radio Frequency Identification), a technology that integrates the use of electromagnetic or electrostatic coupling within the radio frequency of the electromagnetic spectrum portion to identify an object, an animal or a person, and consists of three elements, an antenna and a transceiver ( Commonly integrated into readers), and tags also called transponders. The transponder transmits the data it has to the antenna, and the reader receives the information through the antenna to recognize the object information. In this case, the transponder may be configured as a passive type operating by receiving a radio wave of a reader and an active type operating by its own power supply.

 The object identification method as described above will be gradually replaced by the RFID method, but is currently being used in combination. Therefore, it is necessary to be able to use a barcode and RFID at the same time for object identification. For this reason, the present invention provides an RFID tag having an RFID chip on which the printed information such as a barcode for object identification is printed on the outer surface and the object information is recorded on the inner surface, and at the same time performing a printing operation on the surface of the RFID tag. Radio frequency identification (RFID) printers (hereinafter referred to as " RFID printers ") are also provided that allow object information to be recorded.

1 is a perspective view of a typical radio frequency identification (RFID) printer, FIG. 2A is a cross-sectional view of a radio frequency identification (RFID) printer of FIG. 1, and FIG. 2B is a functional block diagram of a radio frequency identification (RFID) printer of the prior art. Referring to Figures 1, 2a and 2b will be described in the prior art RFID printer as follows.

As illustrated in FIGS. 1 and 2A, a general RFID printer records and reads information of a printer unit 10 performing printing on an RFID tag 13 and RFID chips embedded in the RFID tag 13. It consists of a part 20.

The printer unit (10) includes an RFID tag roller (11) on which an RFID tag roll (12) is mounted to supply an RFID tag (13); A thermal head 13a which performs printing on the outer surface of the RFID tag 13; The first ribbon roller 14 and the second ribbon roller 13 are mounted so that the ribbon roll 16 is provided to provide the ribbon 17 for printing between the RFID tag 13 and the thermal head 13a. Is provided with a ribbon roll module (R). The RFID unit 20 includes: an RFID reader board 22 for controlling object information recording operation on the RFID chip of the RFID tag 13; An operating antenna 23 for reading the UID of the RFID chip of the RFID tag 13 under the control of the RFID reader board 22, determining whether there is an abnormality of the RFID tag, and performing information recording if it is normal; The verification antenna 24 for reading the information recorded in the RFID tag 13 by the operation antenna 23 is provided. And a control board 21 for controlling the printer unit 10 and the RFID unit 20 is provided.

The RFID printer P having the above-described configuration receives the control of the control panel 21 driven by receiving information of the host computer for controlling the object information recording, and the printer 10 prints image information such as bar code on the RFID tag. In addition, the RFID unit 20 operates to record the object information to which the RFID tag 13 is attached to the RFID chip and verify the recorded information when it is normal after determining whether the RFID tag 13 is normal.

FIG. 2A is a functional block diagram of an RFID unit of the RFID printer P for the verification operation as described above. The RFID reader board 22 includes a first RFID reader unit 22a for RFID transmission / reception of the operation antenna 23. The second RFID reader unit 22a for RFID transmission and reception of the verification antenna 24 is connected to the control unit 21a of the control panel 21 to perform recording and reading operations of the RFID information.

However, the RFID printer P of the related art as described above has the following problems.

First, the RFID printer P of the prior art has a problem that the RFID tag roll 12 does not detect the ribbon roll 16.

Second, wrinkles of the ribbon may occur during operation, which causes a problem that accurate printing is not performed.

Third, in the conventional RFID printer P, as described above, since the first RFID reader unit 22a and the second RFID reader unit 22a communicate with the control unit 21a, data collision may occur. I have a problem.

Fourth, when the malfunction of the printer control unit (see Fig. 7) of the control panel 21 of the prior art RFID printer (P) is overheated and damaged by the thermal head (13a), this causes the RFID tag 13 There is a problem that can be broken.

Accordingly, the present invention is to solve the above problems of the prior art, to provide an RFID printer having a ribbon roll and RFID tag roll detection function, ribbon wrinkle prevention function, thermal head overheat prevention function and RFID data collision prevention function. For that purpose.

The RFID printer according to the present invention for achieving the above object, one end is attached to the RFID tag roll by the elastic member and the other end is rotatable to the RFID tag roller is equipped with a radio frequency identification (RFID) tag roll A fixed RFID tag roll detection bar is provided, and the other end of the RFID tag roll detection bar is provided with an RFID tag roll switch for generating an RFID tag roll exchange signal when the other end of the RFID tag roll detection bar is in contact. A printer module having a ribbon module to which two ribbon rollers are attached to restrict a ribbon movement, and a thermal head configured to print the RFID tag on an upper portion of the ribbon; An RFID unit including an operation antenna, a verification antenna, and an RFID reader board for recording object information on the RFID chip of the RFID tag at a position below the RFID tag and verifying the record data; And a controller for controlling the printer unit and the RFID unit.

The ribbon roller, and the rotary slip wheel coupled to provide a rotation driving force to the ribbon roller; A driving slip wheel that is slipably coupled to the rotary slip wheel; A coil spring coupled to the driving slip wheel to provide rotational driving force and elasticity in a rotational direction; And a driving wheel for transmitting a rotational driving force transmitted from the driving motor to the coil spring.

The RFID reader board includes: a switch unit for selectively switching operations of the operation antenna and the verification antenna; An integrated RFID reader unit configured to switch the switch unit for data communication between the operation antenna and the verification antenna, and to perform writing, reading, and verifying operations of the RFID chip by the operation antenna and the verification antenna; It is characterized in that the configuration.

The control unit includes a printer control unit for outputting a strobe signal and print data for the on-off of the thermal head; And a thermal head controller disposed between the printer controller and the thermal head to detect when the printer controller malfunctions and to turn off the thermal head.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 is a cross-sectional view of an RFID printer having a ribbon sensing unit and an RFID tag roll sensing unit as an embodiment of the present invention.

As shown in FIG. 3, the general RFID printer includes an RFID unit 200 that records and reads information of the printer unit 100 performing printing on the RFID tag 130 and the RFID chip embedded in the RFID tag 130. It is composed of

The printer unit 100 includes an RFID tag roller 110 on which an RFID tag roll 120 is mounted to supply an RFID tag 13; An RFID tag roll sensing bar 121 having one end attached to the RFID tag roll 120 mounted on the RFID tag roller 110 by an elastic member such as a spring, and the other end of which is provided with a contact and is rotatably fixed to the RFID tag roll 120; An RFID tag roll switch 122 that moves to the RFID tag roller 110 side according to the consumption of the RFID tag and generates an RFID tag roll exchange signal when a contact is attached; In order to provide a ribbon 170 for printing between the RFID tag 130 and the thermal head 190, a ribbon roll 160 is mounted, and the first ribbon roller 140 which performs a function to prevent wrinkles of the ribbon is formed. And the second ribbon roller 150 on which the ribbon roll is wound, and one end is in contact with the ribbon 170 by elasticity by an elastic member such as a spring on a path along which the ribbon roll is moved, and the other end is rotatably fixed. The ribbon roll module (R) with the ribbon detection switch 181 for outputting a ribbon exchange signal when the other end of the ribbon detection bar 180 and the ribbon detection bar 180 is attached and contacted at a predetermined position, the ribbon roll module (R) and the ribbon Thermal head 190 for performing a printing operation on the outer surface of the RFID tag by applying heat from the top of the.

The RFID unit 200 includes an RFID reader board 220 that controls object information recording operation on the RFID chip of the RFID tag 130 and selectively switches operations of the operation antenna 230 and the verification antenna 240; An operating antenna 230 for reading the UID of the RFID chip of the RFID tag 130 by the switching control of the RFID reader board 220 and determining whether there is an abnormality of the RFID tag and performing information recording in the normal case; According to the switching control of the RFID reader board 220, a verification antenna 240 for reading the information recorded in the RFID tag 130 by the operation antenna 230 is provided. A control board 210 is provided to control the printer unit 100 and the RFID unit 200 and to prevent overheating of the thermal head 190 of the printer unit 100. Here, the above-described control board 210 corresponds to the control unit of the present invention, 250 of which is not described in the drawing indicates a black marker sensor.

The RFID printer P having the above-described configuration is controlled by the control panel 210 which is driven by receiving information of a host computer for controlling object information recording, and the printer 100 prints image information of a barcode on an RFID tag. After determining whether the RFID tag 130 is normal, the RFID unit 200 operates to record the object information to which the RFID tag 130 is attached to the RFID chip and verify the recorded information.

During this operation, the RFID printer P of FIG. 3 provides a ribbon roll and an RFID tag roll detection function, a ribbon wrinkle prevention function, a thermal head overheat protection function, and an RFID data collision prevention function.

Referring to Figure 3 describes the ribbon roll detection function as follows.

After the ribbon roll 160 is mounted on the RFID printer P, the ribbon sensing bar 180 is contacted with the ribbon 170 by one end by elasticity such as a spring on the path where the ribbon 170 is moved. Located at 180a. However, when the ribbon runs out and is wound around the second ribbon roller 150, the supporting force by the ribbon 170 is lost, and the ribbon sensing bar 180 is positioned at 180b, and at this time, the ribbon sensing bar 180 The contact is brought into contact with the ribbon sensing switch 181 to operate to output a ribbon exchange signal.

4 is a cross-sectional view of an RFID printer showing an operating state of an RFID tag roll sensing unit according to an embodiment of the present invention. Referring to FIG. 4, a ribbon roll and an RFID tag roll sensing function in an RFID printer according to the present invention will be described below. same.

The RFID tag roll detection bar 121 is located at the position of 121a when the initial RFID printer P operates, and moves to the RFID tag roller 110 to 121b, 121c, etc. according to the consumption of the RFID tag. If it is set to output the RFID tag roll exchange signal at the position of 121c, a contact formed at the rotatably fixed end of the RFID tag roll detection bar 121 comes into contact with the RFID tag roll switch 122 and thus the RFID tag roll exchange signal. Outputs At this time, the position for generating the RFID tag roll exchange signal may be selectively set as required by the operator.

5 is an exploded perspective view of a ribbon roll module having a ribbon wrinkle prevention function.

Due to the difference in rotational speed due to the rotational inertia of the first ribbon roller 140 and the first ribbon roller 150 during driving of the RFID printer P, the ribbon may not be always kept taut. In this case, as described in the problems of the prior art, a problem may occur that the print quality is reduced. Therefore, the present invention proposes a structure of the first and second ribbon roller to solve this problem.

As shown in FIG. 5, in the ribbon roll module R for preventing the ribbon wrinkle, the first and second ribbon rollers 140 and 150 and the first and second ribbon rollers 140 and 150 rotate. The ribbon roller bracket R1 is provided with a ribbon roll so that the mounting portion is provided at the center portion, and at one side thereof, a driving box on which a driving force transmission component for transmitting driving force to the ribbon roller is mounted, and a driving box equipped with driving force transmission components. It consists of the ribbon roller bracket R1 which consists of a cover R2 which seals.

The driving force transmission components described above will be described in detail.

First, the driving force transmission components for the rotational drive of the first ribbon roller 140, the first sleep wheel 141 and the first to provide an elastic force in the rotational direction of the first sleep wheel (sleep) It consists of a coil spring 142, a driving wheel 143 for transmitting a rotational driving force to the first ribbon roller 140 through the first coil spring 142 and the first slip wheel 141.

In the above-described configuration, the first slip wheel 141 includes a first rotary slip wheel 141a which rotates together with the first ribbon roller 140 and a protrusion 142a formed at one end of the first coil spring 142. The first driving slip wheel for providing an elastic force in the rotation direction by the first coil spring 142 formed with a fixing groove (141c) in one position of the outer circumferential surface so as to be fixed to the first rotation slip wheel (141a) When the rotational driving force is not transmitted because the rotational force is not coupled, the first rotational sleep wheel 141a is rotated in the rotational direction on the first driving sleep wheel 141b due to the inertia and elasticity of the first coil spring. It is configured to rotate at an angle.

Next, the first coil spring 142 has a structure in which protrusions 142a and 142b are formed by bending both ends of the spring wire forming the coil spring in a coupling direction.

The driving wheel 143 receives a rotational driving force from a driving motor (not shown) mounted on the RFID printer R, and transmits the rotational driving force to the first ribbon roller 140. The driving wheel fixing groove 143b to which the protrusion 142b of the spring 142 is fixed is formed, and a structure in which a protrusion is inserted into the first slip wheel 141 through the first coil spring 142 is formed in the center portion. Has

Referring to the coupling and operation of the driving force transmission components for the rotational drive of the first ribbon roller 140 having the above-described configuration is as follows.

The first slip wheel 141 has a first ribbon roller through a through hole formed in the surface of the drive box B along the engagement line shown in the drawing, with the protrusion 141d formed on the center surface of the first rotary slip wheel 141a. It is coupled to transmit driving force to 140. In addition, the first slip wheel 141 is coupled to the driving wheel 143 in a state of sandwiching the first coil spring 142. At this time, one protrusion 142a is fitted into the fixing groove 141c of the first driving slip wheel 141b of the first slip wheel 141, and the other protrusion 142b of the first coil spring 142 is driven. It is mounted between the first slip wheel 141 and the driving wheel 143 in a state of being fitted into the driving wheel fixing groove 143b of the wheel 143.

After being coupled in this way, the driving wheel 143 receives a rotational driving force from a driving motor (not shown) mounted on the RFID printer R to the first slip wheel 141 through the first coil spring 142. The rotational driving force is transmitted to rotate the first ribbon roller 140. At this time, the first coil spring 142 is wound in the opposite direction of rotation to provide an elastic force in the rotation direction with the first slip driving wheel 141b. Therefore, when the rotation of the driving motor is stopped, the first slip wheel 141 is further rotated by a predetermined angle in the rotation direction by the inertia and the elasticity of the first coil spring 142 to prevent the occurrence of wrinkles. At this time, when a constant force is applied due to the tension of the ribbon, the first rotation sleep wheel 141a on the first driving sleep wheel 141b stops rotation and sleeps on the ribbon. The force is prevented to prevent the ribbon from breaking.

Next, the driving force transmission components for the rotational drive of the second ribbon roller 150, the second slip wheel 151 and the second slip (wheel) to provide an elastic force in the rotational direction of the sleep wheel (sleep) The second drive gear 153 and the second drive gear for transmitting rotational driving force to the second ribbon roller 140 through the second coil spring 152, the second coil spring 152, and the second slip wheel 151. It is composed of rows 154. At this time, the second drive gear 153 and the second drive gear train 154 may be composed of a drive wheel 143 for the rotation of the first ribbon roller 140.

In the above-described configuration, the second slip wheel 151 has a second rotary slip wheel 151a which rotates together with the second ribbon roller 150 and a protrusion 152a formed at one end of the second coil spring 152. The second driving slip wheel which provides an elastic force in the rotational direction by the second coil spring 152 having a fixing groove 151c formed at one position of the outer circumferential surface so as to be fixed, and transmitting the rotation driving force to the second rotating slip wheel 151a. When 151b is coupled and rotation driving force is not transmitted, the second rotation sleep wheel 151a is rotated in the rotational direction on the second driving sleep wheel 151b due to the inertia and elasticity of the second coil spring. It is configured to rotate at an angle.

Next, the second coil spring 152 has a structure in which protrusions 152a and 152b are formed by bending both ends of the spring wire forming the coil spring in a coupling direction.

The second drive gear 153 and the second drive gear train 154 are rotated to the second ribbon roller 150 by receiving a rotational driving force from a drive motor (not shown) mounted on the RFID printer R. In order to transfer the driving force, a drive gear fixing groove 153b is formed in the outer circumferential surface of the second drive gear 153 to which the protrusion 152b of the second coil spring 152 is fixed, and a second coil spring 152 in the center portion thereof. ) Has a structure in which a protrusion is fitted to the second slip wheel 151.

Referring to the coupling and operation of the driving force transmission components for the rotational drive of the second ribbon roller 150 having the above-described configuration is as follows.

The second slip wheel 151 is the second ribbon roller through the through hole formed in the surface of the drive box (B) along the engagement line shown in the drawing is a projection 151d formed on the center surface of the second rotary slip wheel (151a) It is coupled to transmit driving force to 150. The second slip wheel 151 is coupled to the second drive gear 153 in a state of sandwiching the second coil spring 152. At this time, one protrusion 152a of the second coil spring 152 is fitted into the fixing groove 151c of the second driving slip wheel 151b of the second slip wheel 151, and the other protrusion 152b is formed of the second coil spring 152. It is mounted between the second slip wheel 151 and the second drive gear 153 in a state of being fitted into the drive gear groove 153b of the second drive gear 153.

After being coupled in this manner, the second drive gear 153 receives a rotational driving force from a drive motor (not shown) mounted on the RFID printer R through the second drive gear train 154 to receive the second coil spring ( The rotational driving force is transmitted to the second slip wheel 151 through 152 to rotate the second ribbon roller 150. At this time, the second coil spring 152 is wound in the opposite direction of rotation to provide an elastic force in the direction of rotation with the second slip driving wheel 151b. Therefore, when the rotation of the driving motor is stopped, the second slip wheel 151 is further rotated by a certain angle in the rotational direction by the inertia and the elasticity of the second coil spring 152 to prevent the occurrence of wrinkles by keeping the ribbon taut. do. At this time, when a constant force is applied due to the tension of the ribbon, the second rotation sleep wheel 151a on the second driving sleep wheel 151b stops rotation and sleeps on the ribbon. The force is prevented to prevent the ribbon from breaking.

Here, the driving force transmission components for the rotational drive of the second ribbon roller 150 may be manufactured in the same form as the driving force transmission components for the rotational drive of the first ribbon roller 140. Accordingly, the rotary slip wheel of the present invention corresponds to the first and second rotary slip wheels 141a and 151a in FIG. 5, and the driving slip wheel corresponds to the first and second driving slip wheels 141b and 151b. The wheel corresponds to the drive wheel 143 in the case of the first ribbon roller 140 and the second drive gear 153 and the second drive gear train 154 in the case of the second ribbon roller 150.

The RFID printer P of the present invention also has an anti-collision function of RFID data between the operation antenna 230 and the verification antenna 240. 6 is a functional block diagram of the operation antenna 230 and the verification antenna 240 and the RFID reader board 200 according to an embodiment of the present invention having such an RFID data collision prevention function.

As illustrated in FIG. 6, the RFID reader board 220 of the present invention for preventing RFID data collision may include a switch unit 225 and a switch unit for selectively switching the operation of the operation antenna 230 and the verification antenna 240. An integrated RFID reader unit 220 'that controls the recording and reading of the RFID chip through the operation antenna 230 and the verification antenna 240 through 225 is configured.

When the integrated RFID reader 220 'is required to drive the operating antenna 230, the switch RFID 225 switches the switch 225 to perform data communication only with the operating antenna 230 to communicate only with the operating antenna 230. When the verification antenna 240 needs to be driven, the switch unit 225 is switched to perform data communication only with the verification antenna 240 so that only the verification antenna 230 communicates with the operation antenna. Both antennas are controlled and RFID data collision due to simultaneous operation of the operation antenna 230 and the verification antenna 240 is prevented.

The RFID printer P of the present invention has a thermal head overheating prevention function. 7 is a functional block diagram of a control board 210 having a thermal head control unit for performing a thermal head overheating prevention function according to an embodiment of the present invention.

Referring to Figure 7 describes the configuration and operation for the thermal head overheating prevention function of the present invention.

As shown in FIG. 7, a printer control unit 211 and a printer for outputting strobe (STR1) signals and print data for turning on and off the thermal head 190 are provided on the control board 210 to prevent thermal head overheating. The thermal head controller 213 is configured to detect the malfunction of the controller 211 and forcibly turn off the thermal head 190.

 In the above-described configuration, the printer control unit 211 outputs a strobe signal for turning on the thermal head 190 when performing a print job to perform a print job. At this time, when the print control unit 211 performs a malfunction and continuously outputs the strobe signal, the thermal head 190 is continuously overheated by being kept in an on state, and thus, the thermal head 190 may be damaged or The quality is degraded. In this case, the thermal head controller 213 detects when the duration of the strobe signal exceeds a predetermined time and outputs an off signal of the thermal head 190 to prevent overheating of the thermal head.

8 is a circuit diagram according to an embodiment of the thermal head controller of FIG. 7 for preventing the thermal head from being overheated as described above. In the circuit diagram shown in FIG. 8, a circuit is operated to forcibly turn off the thermal head when the RC time constant elapses using a RC time constant, and when a strobe signal is input from the printer control unit 211. An inverter 310 for inverting is provided, and a first flip-flop 310 for receiving an output signal of the inverter 310 as a clock terminal and outputting the inverting terminal Q bar is provided. An OR terminal 330 for receiving the inverted terminal output signal of the 310 and the strobe signal of the printer controller 211 and outputting the OR to the thermal head 190 is provided, and the first flip-flop 310 is provided. Inverter terminal output signal line of) is provided with a transistor 370 in parallel with the inverter terminal output signal of the first flip-flop 320 as the collector terminal and the emitter terminal is grounded, and one side of the resistor R34 is grounded. And capacities And a time constant detection circuit 340 for detecting time constants in parallel, and the strobe signal and time constant detection of the printer control unit 211 are provided at the oragate 330 side of the time constant detection circuit 340. An AND gate 350 is provided to receive and output an output signal of the circuit 340, and output the AND signal. An output signal of the AND gate 350 is clear on the output side of the AND gate 350. The first flip-flop 320 is connected to the terminal, and the output signal of the AND gate 350 is input to the clear terminal CL, and the strobe signal STR1 of the printer control unit 211 is input to the clock terminal. CLK) and the output terminal Q is connected to be input to the base terminal of the transistor 370 and the second flop flop 360 is provided.

The thermal head control unit 213 having the above-described configuration of FIG. 8 detects a time when the charging power of the time recovery circuit 340 is discharged when the printer control unit 211 continues to malfunction to output the strobe signal. In this case, the AND gate 350 inputs a clear signal to the first flip-flop 320, and the first flip-flop 320 outputs the thermal head 190 off signal through the inversion terminal Q bar. To turn off the thermal head 190. In addition, the second flip-flop 360 prevents the thermal head 190 from being turned off during normal reading by operating to continue charging the capacitor of the time constant circuit during the normal operation of the printer control unit 211. By this operation, when the printer control unit 211 malfunctions, the thermal head can be prevented from being overheated.

The above-described RFID printer of the present invention provides convenience in use by outputting the point of exchange of the RFID tag roll and the ribbon roll.

In addition, the above-described RFID printer of the present invention prevents wrinkles of the ribbon, prevents data collision between the operation antenna and the verification antenna, and significantly reduces the malfunction of the RFID printer by preventing overheating of the thermal head. It guarantees the accuracy of recording data of RFID chip, improves user's convenience and significantly improves the durability of RFID printer.

Claims (4)

RFID tag roller equipped with RFID tag roll is equipped with an RFID tag roll detection bar, one end of which is attached to the RFID tag roll by an elastic member and the other end is rotatably fixed, and an RFID tag roll detection bar. At the other end of the RFID tag roll detection bar is provided with an RFID tag roll switch to generate an RFID tag roll exchange signal when the other end of the RFID tag roll detection bar, and two ribbon rollers that regulate the movement of the ribbon on the top of the RFID tag path A printer module having an attached ribbon module, and a thermal head configured to perform printing on the RFID tag on an upper portion of the ribbon; An RFID unit including an operation antenna, a verification antenna, and an RFID reader board for recording object information on the RFID chip of the RFID tag at a position below the RFID tag and verifying the record data; And a control unit for controlling the printer unit and the RFID unit. The method according to claim 1, wherein the ribbon roller, A rotary slip wheel coupled to the ribbon roller to provide a rotation driving force; A driving slip wheel that is slipably coupled to the rotary slip wheel; A coil spring coupled to the driving slip wheel to provide rotational driving force and elasticity in a rotational direction; And a driving wheel coupled to the coil spring to transfer a rotational driving force transmitted from the driving motor. The method according to claim 1, wherein the RFID reader board, A switch unit for selectively switching operations of the operation antenna and the verification antenna; An integrated RFID reader unit configured to switch the switch unit for data communication between the operation antenna and the verification antenna, and to perform writing, reading, and verifying operations of the RFID chip by the operation antenna and the verification antenna; RFID printer, characterized in that configured. The method according to claim 1, wherein the control unit, A printer control unit which outputs a strobe signal and print data for turning on and off the thermal head; And a thermal head control unit located between the printer control unit and the thermal head to detect when the printer control unit malfunctions, and to turn off the thermal head.

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