JP2007193569A - Electronic seal device and electronic tag paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic seal device capable of storing sealing information on paper as electronic data with a simpler composition. <P>SOLUTION: This electronic seal device 1 is equipped with a sealing detection sensor 19 for detecting sealing between a printing surface fixing plate 17 fixed on upper surface of a printing surface 3 and the side part of a control board 11 having a control circuit and a transmission coil 14 for making radio communication with an RFID tag 7 buried in electronic tag paper 5. When the sealing detection sensor 19 detects sealing by the pressure applied to the printing surface 3, the control circuit transmits the sealing information data to be written into the RFID tag 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic seal stamp device for stamping an electronic tag paper having an RFID tag, and an electronic tag paper stamped by the electronic seal stamp device.

Conventionally, when a document such as an approval document or a plan document is circulated in a company or the like, the document is stamped or signed in order to confirm the circulation status. However, in recent years, with the development of computer technology and IT technology, there is an increasing interest in handling information on whether or not a document has been stamped as electronic data.
For example, Patent Document 1 discloses a seal stamp with an RFID tag in which a unique number is stored, a read / write device having a tag reader and a magnetic reader / writer, a circulation sheet having a magnetic recording layer for recording circulation information, and the like. A document circulation system including a server having a database for storing information is disclosed.

According to the above configuration, when the circulation sheet is set on the reading / writing device and the sheet is stamped with the seal, the reading / writing device reads the circulation information recorded on the circulation sheet and the unique number recorded on the stamp. These pieces of information are transmitted to the server via the network so that the document circulation information is managed.
JP 2005-222280 A

However, the system disclosed in Patent Document 1 has a very large configuration and has a problem that it is necessary to be performed on a read / write device whenever a document is stamped and is difficult to use.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic seal stamp device capable of storing stamp information as electronic data on a sheet with a simpler configuration, and an electronic stamp printed by the electronic seal stamp device. To provide tag paper.

  According to the electronic seal stamp apparatus of the first aspect, when the marking detection sensor detects the marking by the pressure acting on the marking surface, the built-in reader / writer transmits data to be written to the RFID tag on the electronic tag paper side. Therefore, if the user stamps the electronic tag paper using an electronic seal stamp device in the same manner as when stamping a normal paper with a normal seal, the stamp information is electronically transferred to the RFID tag included in the electronic tag paper. It can be stored as data.

  According to the electronic seal stamp apparatus of the second aspect, the core is disposed on the inner peripheral portion of the coiled antenna, and therefore, when the reader / writer transmits data to the RFID tag of the electronic tag paper, the coiled antenna generates communication. The magnetic field is concentrated at the center of the marking surface. Accordingly, stable communication can be performed and leakage of electromagnetic waves to the periphery can be reduced.

  According to the electronic seal stamp apparatus of the third aspect, since the core is disposed so as to surround the outer periphery of the coiled antenna, the communication magnetic field generated by the coiled antenna is more concentrated in the region of the marking surface. Therefore, more stable communication can be performed, and electromagnetic wave leakage can be further reduced.

  According to the electronic seal stamp apparatus of the fourth aspect, since the display means displays the operation state of the reader / writer, the user refers to this display, and data is transmitted (and written) to the RFID tag. Can be confirmed.

  According to the electronic seal stamp apparatus of the fifth aspect, since the display means is provided at a position indicating the top of the marking surface, if the position of the display means is confirmed and stamped, the stamp is printed on the electronic tag paper with the correct direction. be able to.

  According to the electronic seal stamp apparatus of the sixth aspect, when the reader / writer detects the seal, the reader / writer reads the date / time data from the calendar clock and transmits the date / time data together with the stamp information data to the RFID tag. This information can also be stored as electronic data in the RFID tag of the electronic tag paper.

  According to the electronic tag paper of the seventh aspect, since the outer dimension of the coiled antenna of the RFID tag is made equal to the outer dimension of the core of the electronic seal stamp apparatus according to the third aspect, leakage of electromagnetic waves for communication can be further reduced. At the same time, more stable communication can be performed.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view showing the external appearance of the electronic seal stamp apparatus and the electronic tag paper. The electronic seal stamp apparatus 1 has substantially the same shape as a general seal stamp, and has, for example, a bottomed cylindrical main body 2. The main body 2 is formed by integrally forming an upper case 2a and a lower case 2b having a slightly larger diameter than the upper case 2a, and the first and last names are formed in the opening provided on the lower end side in FIG. A disc-shaped stamping surface (denoted by reference numeral 3 in FIG. 1) having a concavo-convex imprint pattern representing the above is disposed. Further, on the lower side surface of the upper case 2a, an LED 4 (corresponding to a display means) described later is provided at a position indicating the top of the marking surface 3.
The electronic tag paper 5 has a marking unit 6 for marking, and an RFID tag (indicated by reference numeral 7 in FIG. 1) is embedded in the marking unit 6. It should be noted that the portions other than the stamp portion 6 are configured as general plain paper.

  FIG. 1 is a longitudinal sectional view of the electronic seal stamp apparatus 1 and the electronic tag paper 5 and schematically shows the internal configuration thereof. Inside the upper case 2a, primary batteries 8 and 9 as power sources are connected in series and arranged so as to be removable. Moreover, LED4 as an indicator which displays an operation state is arrange | positioned by making the light emission part protrude outside from the left side surface in FIG.

  Inside the lower case 2b, a power supply board 10 and a control board 11 configured as a printed wiring board are arranged in the upper part and the central part, respectively. The power supply board 10 is provided with a power supply circuit (indicated by reference numeral 12 in FIG. 5), and the power from the primary batteries 8 and 9 is supplied through wiring (not shown). The power supply circuit 12 stabilizes the power from the primary batteries 8 and 9 and supplies the stabilized power to each unit. In addition, a control circuit for performing wireless communication with the RFID tag 7 (indicated by reference numeral 13 in FIG. 5), a transmission / reception coil (coiled antenna) formed in a ring shape by winding a conductor on the control board 11 14 or the like. The power supply board 10 and the control board 11 are electrically connected by connectors 15 and 16 at both ends, and are mechanically coupled.

  A marking surface mounting plate 17 having substantially the same shape as the aforementioned marking surface 3 is fixed to the lower end portion of the lower case 2b, and the upper surface of the marking surface 3 is fixed to the lower surface of the marking surface mounting plate 17. The lower case 2b is disposed so as to protrude slightly from the lower end. A transmitting / receiving coil 14 is positioned above the stamping surface mounting plate 17, and a bottomed cylindrical ferrite core (corresponding to a core) 18 is disposed with respect to the transmitting / receiving coil 14 so as to cover the whole from above. ing. That is, the ferrite core 18 has a convex portion 18 a that protrudes with respect to the hollow portion of the transmission / reception coil 14, and the circumferential portion 18 b surrounds the outer peripheral side of the transmission / reception coil 14. The ferrite core 18 is disposed in order to concentrate the magnetic field generated from the transmitting / receiving coil 14 in the region of the marking surface 3. Further, a stamp detection sensor 19 is provided between the stamp face mounting plate 17 and the right part of the control board 11 for detecting that the stamp has been performed.

FIG. 3 is an enlarged vertical cross-sectional view of a portion related to the stamp detection sensor 19, where (a) shows a normal time and (b) shows a time of stamping. As shown in FIG. 3A, the stamp detection sensor 19 includes a rubber contact 20, a movable contact 21, and fixed contacts 22 and 23. The rubber contact 20 is made of, for example, an elastically deformable rubber material, and includes a lower end portion 20a, a flexible portion 20b, and an upper end portion 20c.
The fixed contacts 22 and 23 are provided on the lower surface side of the control board 11 in FIG. 3, and the upper end portion 20 c of the rubber contact 20 is fixed to the control board 11 so as to surround the fixed contacts 22 and 23. Yes. In FIG. 3 of the lower end portion 20a, a movable contact 21 is provided on the upper surface so as to face the fixed contacts 22, 23, and a stamp face mounting plate 17 is fixed to the lower surface. The flexible portion 20b has, for example, a thin skirt shape, and connects the upper end portion 20c and the lower end portion 20a.

  In the above configuration, when a stamp is made by the electronic seal stamp apparatus 1, upward pressure is also applied to the lower end portion 20a via the stamp face 3 and the stamp face mounting plate 17, as shown in FIG. Then, since the flexible portion 20b is elastically deformed, the lower end portion 20a and the movable contact 21 move upward. When the movable contact 21 comes into contact with the fixed contacts 22 and 23 to short-circuit them, the power supply circuit 12 starts supplying power to each part.

  On the other hand, in the electronic tag paper 5, as described above, the RFID tag 7 that performs wireless communication with the electronic seal stamp apparatus 1 is embedded in the marking unit 6. FIG. 4 is a perspective view schematically showing the configuration of the RFID tag 7, and the entire RFID tag 7 is provided with a resin mold 24 so as not to be uneven. The RFID tag 7 includes a circuit board 25, a transmission / reception coil (corresponding to a coiled antenna) 26 and an IC chip 27 disposed on the circuit board 25. The transmitting / receiving coil 26 is formed in an annular shape by winding a conductor, and the outer dimension thereof is equal to the outer dimension of the ferrite core 18 in the electronic seal stamp apparatus 1. In addition, the IC chip 27 is disposed at the center of the transmission / reception coil 26.

FIG. 5 is a block diagram showing an electrical configuration of the electronic seal stamp apparatus 1. The electronic seal stamp device 1 includes an LED 4, primary batteries 8 and 9, a power supply circuit 12, a control circuit 13, a transmission / reception coil 14, a stamp detection sensor 19, a memory 28, and a transmission / reception circuit 29.
The control circuit 13 is mainly composed of a microcomputer including a CPU and the like, and includes an RTC (Real Time Clock, corresponding to a calendar clock) 13a that is a timer for timekeeping. Further, the control circuit 13 transmits / receives data such as seal information to / from the external RFID tag 7 via the transmission / reception circuit 29. That is, the electronic seal stamp apparatus 1 has a function as a reader / writer. As shown in FIG. 6, this stamp information data includes a stamper identification information for identifying a stamper such as a name, a stamp date / time information indicating the date and time at the time of stamping, and a password identification information for security. Consists of information. Then, the control circuit 13 writes or reads these marking information data in the memory 28.

  The transmission / reception circuit 29 includes a transmission unit and a reception unit (both not shown). When transmission data output from the control circuit 13 is encoded by the transmission unit, a carrier wave is further modulated by the encoded data. The modulated signal is output to the transmission / reception coil 14. The modulated signal is transmitted to the outside as a radio wave signal from the transmission / reception coil 14. The radio signal received by the transmission / reception coil 14 is input to the receiving unit. Then, the receiving unit performs demodulation processing and decoding processing, and the decoded received data is output to the control circuit 13.

As described above, the power supply circuit 12 is supplied with power from the primary batteries 8 and 9 and is supplied with a seal detection signal from the seal detection sensor 19. The power supply circuit 12 is configured to supply operation power to each circuit such as the control circuit 13 and the transmission / reception circuit 29 when the seal detection signal becomes active by closing the fixed contacts 22 and 23. Yes.
In addition, the electronic seal stamp apparatus 1 includes an LED 4 for writing display. The LED 4 is controlled by the control circuit 13, and the control circuit 13 lights the LED 4 when power is supplied from the power supply circuit 12. In this embodiment, the primary battery 8 and 9 and the power supply circuit 12 constitute a power source.

  Next, an electrical configuration of the RFID tag 7 embedded in the electronic tag paper 5 will be described with reference to a block diagram shown in FIG. The RFID tag 7 includes a transmission / reception coil 26, a control circuit 30, a transmission / reception circuit 31, a memory 32, and a power supply circuit 33. The control circuit 30 is mainly composed of a microcomputer. Further, the control circuit 30 transmits / receives data to / from the electronic seal stamp apparatus 1 via a transmission / reception circuit 31 including a transmission unit and a reception unit. In the above configuration, the portion excluding the transmission / reception coil 26 constitutes the IC chip 27.

When the RFID tag 7 receives the carrier wave transmitted from the electronic seal stamp device 1 via the transmission / reception coil 26, the power supply circuit 33 rectifies the carrier wave to generate a power supply for operation, and the control circuit 30, the transmission / reception circuit 31, etc. Supply to the circuit.
Further, the transmission data from the electronic seal stamp device 1 superimposed on the carrier wave is demodulated at the receiving unit and output to the control circuit 30. When the operation circuit is supplied and activated, the control circuit 30 receives transmission data from the electronic seal stamp device 1 and reads data stored in the memory 32, and writes data when a write command is transmitted. . Then, the response data output from the control circuit 30 is encoded in the transmission unit, then subjected to load modulation, and returned to the electronic seal stamp apparatus 1.

About the electronic seal stamp apparatus 1, it is necessary to set initial information, such as a stamper identification information, before using. In this case, as shown in FIG. 8, the initial setting information data is written in the electronic seal stamp apparatus 1 using the simulation tag 34 and the computer 35.
The simulated tag 34 includes a control circuit 36, a transmission / reception circuit 37, a transmission / reception coil 38, and a power supply circuit 39, and performs wireless communication with the electronic seal stamp apparatus 1 in the same manner as the RFID tag 7. The simulated tag 34 is connected to the computer 35 via a USB (Universal Serial Bus) or the like, and transmits and receives data and is supplied with power from the computer 35. Further, the computer 35 stores initial setting information of the user set in the electronic seal stamp apparatus 1.

  When the control circuit 36 of the simulation tag 34 receives an information setting request from the electronic seal stamp device 1 via the transmission / reception coil 38 and the transmission / reception circuit 37, the control circuit 36 reads initial setting information data such as stamper identification information from the computer 35, and transmits / receives the transmission / reception circuit. It transmits to the electronic seal stamp apparatus 1 via 37 and the transmission / reception coil 38. Then, when receiving the initial setting information data, the control circuit 13 of the electronic seal stamp apparatus 1 sets the initial information by writing these data in the memory 28.

  Next, the operation of this embodiment will be described with reference to FIG. FIG. 9 shows processing on the electronic seal stamp apparatus 1 side when performing communication between the electronic seal stamp apparatus 1 and the RFID tag 7 embedded in the electronic tag paper 5 or between the electronic seal stamp apparatus 1 and the simulated tag 34. It is a flowchart which shows the content. As described above, since it is necessary to set initial information for the electronic seal stamp apparatus 1 before use, a case where initial information is set first will be described.

First, when the user brings the marking surface 3 of the electronic seal stamp device 1 into contact with the upper surface of the simulation tag 34 and pushes it downward to perform the marking, an upward pressure is applied to the marking surface 3. Then, the marking detection sensor 19 detects the marking by the fixed contacts 22 and 23 coming into contact with the movable contact 21 and being short-circuited (step S1). When the seal is detected, the power supply circuit 12 starts supplying power to each unit (step S2).
When power is supplied, the control circuit 13 starts a timer count (step S3), and counts until a predetermined time, for example, several seconds elapses. Then, an interrogation signal is transmitted from the transmission / reception coil 14 to the simulation tag 34 (step S4). At this time, a READY response signal indicating that data is ready to be received is not returned from the simulation tag 34 (step S5: “NO”), so as to confirm whether or not the initial setting information data should be transmitted. Is returned (step S11: “YES”).

  If the information setting request signal is not returned (step S11: “NO”), the control circuit 13 transmits an interrogation signal until a predetermined time elapses (step S16: “NO”), and the simulated tag 34. Waits for a response from (steps S4, S5, S11). However, when a predetermined time elapses without a response (step S11: “NO”, step S16: “YES”), the control circuit 13 stops the power supply from the power supply circuit 12 after performing the termination process. (Step S9) The process ends.

  When the information setting request signal is received in step S11 (“YES”), the control circuit 13 transmits a READY response signal (step S12). Then, the simulation tag 34 reads initial setting information data such as stamper identification information from the computer 35 and transmits these data. When these data are returned from the simulation tag 34 (step S13: “YES”), the control circuit 13 writes the received initial setting information data in the memory 28 and sets the initial information (step S14). When the setting of the initial information is completed, a completion signal indicating that is transmitted to the simulation tag 34 (step S15), and after the termination process is performed, the power supply from the power supply circuit 12 is stopped and the process is terminated. .

  If the initial setting information data is not returned (step S13: “NO”), the control circuit 13 transmits a REDY response signal from the simulation tag 34 until a predetermined time elapses (step S17: “NO”). Is waited for (steps S12 and S13). However, when the predetermined time has passed without any response (step S13: “NO”, step S17: “YES”), the process proceeds to step S9.

  Next, description will be given of a case where, for example, electronic tag paper 5 which is a circulation document is used for stamping using the electronic seal stamp apparatus 1 in which initial information is set. When the user stamps the electronic seal stamp device 1 on the marking unit 6 of the electronic tag paper 5, steps S1 to S5 are executed in the same manner as in the case of the simulated tag 34. In step S5, when a READY response signal is returned from the RFID tag 7 ("YES"), the control circuit 13 reads the stamp information data stored in the memory 28 and also the date and time at that time from the RTC 13a. Data is read out (step S6).

Subsequently, the control circuit 13 transmits the read data to the RFID tag 7 from the transmission / reception coil 14 (step S7). Upon receiving the stamp information data and date / time data, the RFID tag 7 writes these data in the memory 32, stores the identification information of the stamper, the date / time when the stamp was performed, etc. as electronic data, and transmits a completion response signal. . When the completion response signal is returned from the RFID tag 7 (step S8: “YES”), the control circuit 13 proceeds to step S9.
Here, when the completion response signal is not returned from the RFID tag 7 (step S8: “NO”), the control circuit 13 reads the stamp information data and the date / time data until a predetermined time elapses (step S10: “NO”). And waits for a response from the RFID tag 7 (steps S6, S7, S8). However, if a predetermined time elapses without a response (step S8: “NO”, step S10: “YES”), the process proceeds to step S9.

  As described above, the stamp information is written in the electronic tag paper 5. Then, the plurality of electronic tag papers 5 in which the seal information is written are collected in one place, for example, and the seal information data stored in the RFID tag 7 is read using a dedicated reader / writer. If the stamp information data read by the reader / writer is transmitted to the server, the server can collectively manage the stamp information of the plurality of electronic tag papers 5.

  As described above, according to the present embodiment, in the electronic seal stamp device 1, when the seal detection sensor 19 detects the seal by the pressure acting on the stamp surface 3, the control circuit 13 performs the seal writing on the RFID tag 7 on the electronic tag paper 5 side. Send information data. Therefore, if the user performs a stamp on the electronic tag paper 5 using the electronic seal stamp device 1 with the same feeling as when performing a seal on a normal paper with a normal seal, the stamp information is stored in the RFID tag 7 as electronic data. It can be memorized.

Further, since the convex portion 18a of the ferrite core 18 is disposed on the inner peripheral portion of the transmission / reception coil 14, and the circumferential portion 18b is also disposed so as to surround the outer periphery of the transmission / reception coil 14, a communication magnetic field generated by the transmission / reception coil 14 is generated. Stable communication can be performed by concentrating on the central portion of the marking surface 3, and leakage of electromagnetic waves to the periphery can be reduced.
In addition, the electronic seal stamp device 1 and the electronic tag paper 5 perform communication in contact with each other, and the communicable area is limited to a very narrow range by arranging the ferrite core 18 as described above. In addition to being hardly affected by electromagnetic waves or the like, power consumption associated with communication can be reduced.

  Moreover, since the operation state of the electronic seal stamp apparatus 1 is displayed by the LED 4, the user can confirm that data has been transmitted from the electronic seal stamp apparatus 1 to the RFID tag 7 and written by referring to this display. Then, the user can efficiently perform the writing of the stamp information data by finishing the stamping by the electronic seal stamp apparatus 1 at an appropriate timing. Furthermore, since the LED 4 is arranged at a position indicating the top of the stamp surface 3, the user can mark the electronic tag paper 5 with the correct imprint direction by checking the position of the LED 4 and performing the marking.

  Further, when the seal is detected, the control circuit 13 reads the date / time data from the RTC 13a and transmits the date / time data together with the seal information data to the RFID tag 7. Therefore, the information on the date and time when the seal is performed is also included in the RFID of the electronic tag paper 5. The tag 7 can be stored as electronic data. In addition, in the electronic tag paper 5, the external dimensions of the transmission / reception coil 26 of the RFID tag 7 are made equal to the external dimensions of the ferrite core 18 of the electronic seal stamp device 1, so that leakage of electromagnetic waves for communication can be further reduced and further. Stable communication can be performed.

The present invention is not limited to the embodiments described above and shown in the drawings, and the following modifications or expansions are possible.
The electronic tag paper 5 may be applied to a document such as a contract that requires a limited period, and date / time data indicating the validity period of the contract may be stored in advance in the memory 32 of the RFID tag 7 on the electronic tag paper 5 side. . In this way, it is possible to determine whether or not the contract was valid at the time of stamping by comparing the date and time data when the electronic seal stamp device 1 was stamped with the date and time data indicating the validity period.

Moreover, although the electronic tag paper 5 is configured by embedding the RFID tag 7 in paper, the RFID tag including the stamping portion 6 can be formed in a seal shape. In this way, by sticking a seal-like RFID tag to various forms of documents, the electronic seal stamp apparatus 1 can be used to store seal information and date / time information as electronic data.
Furthermore, since it is only necessary to be able to affix a seal-like RFID tag, it is not limited to documents. For example, for various circulation items such as books and catalogs, stamp information and date and time information are used as electronic data. Can be saved. Further, it is conceivable that the electronic tag paper is applied to revenue stamps.

  In addition, the stamp information data is composed of stamper identification information, stamp date information, and person confirmation information. However, the present invention is not limited to this, and deletion and modification may be performed as necessary or various information may be added. good. For example, an electronic seal stamp apparatus is applied to a seal used for official use such as a company seal, and data for proving this company seal is added to the seal information data. If the RFID tag of the RFID tag paper is preliminarily stored with data for confirming the company seal, the stamped company seal is genuine. It is possible to prove whether or not.

The outer dimension of the transmission / reception coil 26 of the electronic tag paper 5 is made equal to the outer dimension of the ferrite core 18 of the electronic seal stamp device 1, but is not limited to this as long as stable communication is possible.
The LED 4 is disposed at a position indicating the top of the stamp surface. However, when, for example, a protrusion is provided to indicate the top of the stamp surface, the LED 4 may be disposed at any position that can be confirmed by the user. Moreover, although LED4 was used as a display means, you may comprise using other display components, such as a light bulb and a liquid crystal. Furthermore, when it is not necessary to check the operation state of the electronic seal stamp apparatus 1, the display means may not be provided.
Moreover, although the ferrite core 18 which has the convex part 18a and the circumference part 18b was arrange | positioned so that the whole transmitter / receiver coil 14 of the electronic seal stamp apparatus 1 might be covered from upper direction, if stable communication is possible, a convex part 18a alone or the ferrite core 18 may not be arranged.

1 shows an embodiment of the present invention, and is a longitudinal sectional view of an electronic seal stamp device and electronic tag paper The perspective view which shows the external appearance of an electronic seal stamp apparatus and an electronic tag paper FIG. 2 is an enlarged view of a portion related to the seal detection sensor in FIG. The perspective view which shows the structure of an RFID tag roughly Block diagram showing the electrical configuration of the electronic seal device Diagram showing the format of the seal information data Block diagram showing electrical configuration of RFID tag Block diagram showing electrical configuration of mock tag Flowchart showing the contents of processing performed by the control circuit of the electronic seal stamp device when stamping is performed

Explanation of symbols

  In the drawings, 1 is an electronic seal device (reader / writer), 3 is a seal face, 4 is an LED (display means), 5 is an electronic tag paper, 7 is an RFID tag, 8 and 9 are primary batteries (power supplies), and 12 is a power circuit ( (Power supply), 13 is a control circuit, 13a is an RTC (calendar clock), 14 is a transmission / reception coil (coiled antenna), 18 is a ferrite core (core), 19 is a marking detection sensor, and 26 is a transmission / reception coil (coiled antenna). Show.

Claims (7)

In an electronic seal stamp apparatus for marking electronic tag paper having an RFID tag,
A stamping surface having an imprint pattern for stamping;
A seal detection sensor for detecting a seal by pressure acting on the marking surface;
A reader / writer that communicates with the RFID tag of the electronic tag paper;
A power source for operating the reader / writer,
The reader / writer transmits data to be written to an RFID tag of the electronic tag paper when a seal is detected by the seal detection sensor. The reader / writer includes a coiled antenna,
2. The electronic seal stamp apparatus according to claim 1, wherein a core made of a magnetic material is disposed on an inner periphery of the coiled antenna.   The electronic seal stamp apparatus according to claim 2, wherein the core is disposed so as to surround an outer periphery of the coiled antenna.   The electronic seal stamp apparatus according to any one of claims 1 to 3, further comprising display means for displaying an operation state of the reader / writer.   5. The electronic seal stamp apparatus according to claim 4, wherein the display means is provided at a position indicating the top of the stamp surface. A calendar clock that continuously operates with the power source and counts the date and time,
6. The reader / writer reads date / time data from the calendar clock when a stamp is detected by the stamp detection sensor, and transmits the date / time data to the RFID tag of the electronic tag paper. An electronic seal stamp device according to the above. In the electronic tag paper that is stamped by the electronic seal stamp device according to claim 3,
The RFID tag is connected to a coiled antenna,
The electronic tag paper according to claim 1, wherein an outer dimension of the coiled antenna is set to be equal to an outer dimension of a core of the electronic seal device.

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