WO2019151103A1 - Électrocardiographe portable et système d'électrocardiographie - Google Patents

Électrocardiographe portable et système d'électrocardiographie Download PDF

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Publication number
WO2019151103A1
WO2019151103A1 PCT/JP2019/002282 JP2019002282W WO2019151103A1 WO 2019151103 A1 WO2019151103 A1 WO 2019151103A1 JP 2019002282 W JP2019002282 W JP 2019002282W WO 2019151103 A1 WO2019151103 A1 WO 2019151103A1
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WO
WIPO (PCT)
Prior art keywords
recording
section
electrocardiograph
data
fact
Prior art date
Application number
PCT/JP2019/002282
Other languages
English (en)
Inventor
Satoshi Saitoh
Jun Motogi
Original Assignee
Nihon Kohden Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2018189957A external-priority patent/JP2019130287A/ja
Application filed by Nihon Kohden Corporation filed Critical Nihon Kohden Corporation
Priority to US16/958,366 priority Critical patent/US11806153B2/en
Publication of WO2019151103A1 publication Critical patent/WO2019151103A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0006—ECG or EEG signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
    • A61B5/002—Monitoring the patient using a local or closed circuit, e.g. in a room or building
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A61B5/333—Recording apparatus specially adapted therefor
    • A61B5/335—Recording apparatus specially adapted therefor using integrated circuit memory devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/02—Operational features
    • A61B2560/0204—Operational features of power management
    • A61B2560/0214—Operational features of power management of power generation or supply
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/02—Operational features
    • A61B2560/0266—Operational features for monitoring or limiting apparatus function
    • A61B2560/0271—Operational features for monitoring or limiting apparatus function using a remote monitoring unit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0257—Proximity sensors

Definitions

  • the presently disclosed subject matter relates to a portable electrocardiograph which is carried by a subject and records data corresponding to electrocardiograms of the subject.
  • the presently disclosed subject matter also relates to an electrocardiography system including the portable electrocardiograph.
  • Japanese Patent Publication No. H08-299293A discloses an example of an electrocardiograph used for such examinations.
  • the electrocardiograph is provided with electrodes.
  • an electrocardiogram is recorded under a condition that the electrodes are always in close contact with the skin of the subject.
  • the electrocardiograph described in Japanese Patent Publication No. H08-299293A is equipped with a battery that supplies electric power for usually recording an electrocardiogram. Batteries tend to be large and heavy in order to allow long-term measurements. Electrocardiographs equipped with such batteries also tend to be larger and heavier, so that prolonged wear thereof increases the burden on the subject.
  • the presently disclosed subject matter is intended to reduce the burden imposed on a subject carrying an electrocardiograph.
  • An illustrative aspect of the presently disclosed subject matter provides a portable electrocardiograph comprising: a recording section configured to record data corresponding to electrocardiogram of a subject; a detecting section configured to detect approach of a portable device having a function to perform short-range wireless communication; and a control section configured to start recording of the data in the recording section in a case where it is satisfied a start condition including a fact that the approach of the device is detected by the detecting section.
  • An illustrative aspect of the presently disclosed subject matter provides an electrocardiography system comprising: an electrocardiograph configured to be carried by a subject; and a portable device having a function to perform short-range wireless communication, wherein the electrocardiograph comprises: a recording section configured to record data corresponding to electrocardiogram of the subject; a detecting section configured to detect approach of the device; and a control section configured to start recording of the data in the recording section in a case where it is satisfied a start condition including a fact that the approach of the device is detected by the detecting section.
  • the electrocardiogram data is recorded only when the subject is aware of the abnormality and brings the portable device closer to the portable electrocardiograph, so that the battery to be installed in the portable electrocardiograph can be downsized or omitted.
  • downsizing and weight reduction of the portable electrocardiograph are realized, so that the burden to be imposed to the subject due to the carriage of the portable electrocardiograph can be reduced.
  • Fig. 1 illustrates a configuration of an electrocardiography system according to an embodiment.
  • Fig. 2 illustrates a functional configuration of a portable electrocardiograph and a portable device in the electrocardiography system.
  • Fig. 3 illustrates the principle of contactless power delivery between the portable device and the portable electrocardiograph described above.
  • Fig. 4 illustrates the process performed by the portable electrocardiograph described above.
  • Fig. 5 illustrates the flow of electrocardiogram data in the electrocardiography system described above.
  • an electrocardiography system 1 includes a portable electrocardiograph 2.
  • the electrocardiograph 2 is carried by a subject S.
  • the electrocardiograph 2 is configured so as to have such size and weight that the subject S is able to carry.
  • a plurality of electrodes E are attached and fixed to the chest of the subject S.
  • Each electrode E detects the biopotential of a body position on which the electrode E is attached.
  • the electrocardiograph 2 is provided with an interface 20.
  • a signal corresponding to the biopotential detected through each electrode E is input to the interface 20.
  • the interface 20 includes a circuit for converting the input signal into electrocardiogram data necessary for subsequent processing. Examples of the circuit include an A/D conversion circuit, a filter circuit, and the like. That is, the electrocardiogram data is digital data corresponding to the electrocardiogram of the subject S.
  • a plurality of electrodes E are wired to the electrocardiograph 2.
  • a signal corresponding to the biopotential detected through each electrode E may be input to the interface 20 via wireless communication.
  • a configuration in which a plurality of electrodes E are built in the electrocardiograph 2 may be adopted. In this case, the electrocardiograph 2 is mounted and fixed on the chest of the subject S.
  • the electrocardiograph 2 is provided with a recording section 21.
  • the recording section 21 is configured to include a storage for recording electrocardiogram data.
  • a storage for recording electrocardiogram data.
  • a semiconductor memory, a hard disk drive, or the like can be exemplified.
  • the electrocardiography system 1 includes a portable device 3 (hereinafter, simply referred to as a device 3).
  • the device 3 can be carried by the subject S.
  • the portable device 3 is configured so as to have such size and weight that the subject S is able to carry.
  • the device 3 has a function to perform short-range wireless communication.
  • the device 3 is provided with a short-range wireless communicating section 31.
  • the short-range wireless communicating section 31 can be configured by a communication interface conforming to standards such as RFID (Radio Frequency Identification), NFC (Near Field Communication), and Bluetooth (registered trademark). These standards are specified so that the wireless communication is not obstructed by ordinary clothing or the like.
  • the electrocardiograph 2 is provided with a detecting section 22.
  • the detecting section 22 is configured to be able to detect the approach of the device 3.
  • the detecting section 22 is configured to include a communication interface paired with the short-range wireless communicating section 31 of the device 3.
  • the detecting section 22 detects the approach of the device 3 based on the fact that communication has been established with the communication interface of the short-range wireless communicating section 31.
  • the short-range wireless communicating section 31 may be provided with a transmission coil 311.
  • the detecting section 22 may be provided with a receiving coil 221.
  • a current is supplied to the transmission coil 311 by a power source (not shown) provided in the device 3, a magnetic flux is generated from the transmission coil 311.
  • a current flows through the receiving coil 221 due to the magnetic flux generated from the transmitting coil 311.
  • the detecting section 22 detects the approach of the device 3 based on the fact that the induced current flows through the receiving coil 221.
  • the electrocardiograph 2 is provided with a control section 23.
  • the control section 23 is configured to start recording the electrocardiogram data in the recording section 21 in a case where a start condition is satisfied.
  • the start condition includes the detection of the approach of the device 3 by the detecting section 22.
  • the operation of the control section 23 and the recording of the electrocardiogram data by the recording section 21 are performed by the electric power supplied from the device 3 to the electrocardiograph 2 through the electromagnetic induction.
  • the electrocardiograph 2 is carried by the subject S in a state in which a plurality of electrodes E are attached and fixed to a predetermined body position.
  • the subject S is instructed to bring the device 3 closer to the electrocardiograph 2 when the subject S is aware of an abnormality such as palpitation in daily life.
  • the electrocardiograph 2 In the initial state, the electrocardiograph 2 is in a standby state.
  • the control section 23 determines whether the start condition is satisfied (STEP1). That is, the control section 23 determines whether or not the approach of the device 3 is detected by the detecting section 22. At normal times, the subject S does not bring the device 3 closer to the electrocardiograph 2. Therefore, it is determined that the approach of the device 3 is not detected (N in STEP1). Thus, the standby state of the electrocardiograph 2 is maintained.
  • the subject S When the subject S is aware of abnormalities such as palpitations, the subject S brings the device 3 closer to the electrocardiograph 2. Therefore, it is determined that the approach of the device 3 is detected (Y in STEP1). Therefore, the standby state of the electrocardiograph 2 is canceled, and the control section 23 starts recording the electrocardiogram data in the recording section 21 (STEP2).
  • the power required for signal processing in the interface 20 and recording of electrocardiogram data in the recording section 21 is at least partially supplied from the device 3 through electromagnetic induction.
  • the electrocardiogram data is recorded only when the subject S is aware of the abnormality and brings the device 3 closer to the electrocardiograph 2, so that the battery to be installed in the electrocardiograph 2 can be downsized or omitted.
  • downsizing and weight reduction of the electrocardiograph 2 are realized, so that the burden to be imposed to the subject S due to the carriage of the electrocardiograph 2 can be reduced.
  • the electric power required for recording the electrocardiogram data is at least partially supplied from the device 3 through non-contact power supply such as electromagnetic induction, it is easy to downsize or omit the battery to be installed in the electrocardiograph 2.
  • the start condition may include that the time during which the approach of the device 3 is detected by the detecting section 22 exceeds a predetermined value.
  • the battery to be installed in the electrocardiograph 2 can be easily downsized or omitted. Further, the above advantage can be obtained by a simple processing performed with an internal timer.
  • the device 3 may be provided with a user interface 32.
  • the user interface 32 include a physical button, a lever, a touch-operable button displayed on a display device, and a voice recognition interface.
  • the start condition may include that a predetermined recording start operation has been performed on the user interface 32 of the device 3.
  • Examples of the predetermined recording start operation include an operation of a physical button or a lever, a touch operation of a button displayed on a display device, and an input of sound associated with the start of recording.
  • the device 3 may be provided with a control section 33.
  • the control section 33 When a predetermined recording start operation is performed on the user interface 32, the control section 33 generates a start instruction signal corresponding to the operation, and transmits the generated start instruction signal to the short-distance wireless communicating section 31. If communication is established between the detecting section 22 and the short-range wireless communicating section 31, a start instruction signal is received by the detecting section 22.
  • the control section 23 of the electrocardiograph 2 determines that a predetermined recording start operation has been performed on the device 3 based on the fact that the start instruction signal has been received by the detecting section 22.
  • the battery to be installed in the electrocardiograph 2 can be easily downsized or omitted.
  • the control section 23 of the electrocardiograph 2 may be configured to stop recording the electrocardiogram data to the recording section 21 when a predetermined stop condition is satisfied.
  • the control section 23 determines whether the condition is satisfied (STEP3). If it is determined that the stopping condition is not satisfied (N in STEP3), recording of electrocardiogram data in the recording section 21 is continued.
  • control section 23 stops (STEP4) recording the electrocardiogram data in the recording section 21 and shifts the electrocardiograph 2 to the standby state.
  • the standby state of the electrocardiograph 2 can be canceled only during the period from the time when the start condition is satisfied to the time when the stop condition is satisfied. Therefore, the battery to be installed in the electrocardiograph 2 can be easily downsized or omitted.
  • the stop condition may include the elapse of a predetermined time period from the start of recording of the electrocardiogram data to the recording section 21.
  • the control section 23 counts the elapsed time period from the start of recording with the internal timer. When the counted elapsed time period reaches a predetermined value, the control section 23 automatically stops recording the electrocardiogram data in the recording section 21.
  • the stop condition may include the fact that a predetermined recording stop operation has been performed on the user interface 32 of the device 3.
  • a predetermined recording stop operation an operation of a physical button or a lever, a touch operation of a button displayed on a display device, an input of sound associated with the stop of recording, and the like can be exemplified.
  • the control section 33 when a predetermined recording stop operation is performed on the user interface 32, the control section 33 generates a stop instruction signal corresponding to the operation, and transmits the generated stop instruction signal to the short-distance wireless communicating section 31. If communication is established between the detecting section 22 and the short-range wireless communicating section 31, a stop instruction signal is received by the detecting section 22.
  • the control section 23 of the electrocardiograph 2 determines that a predetermined recording stop operation has been performed on the device 3 based on the fact that the stop instruction signal has been received by the detecting section 22.
  • the electrocardiograph 2 may be provided with an analysis section 24.
  • the analysis section 24 is configured to analyze the electrocardiogram data recorded in the recording section 21 and detect the presence of an arrhythmia. Since the processing per se for detecting the presence or absence of the arrhythmia based on the acquired electrocardiogram data is known, detailed descriptions thereof will be omitted.
  • the stop condition may include the elapse of a predetermined time period from the time when the disappearance of the arrhythmia is detected by the analysis section 24.
  • the control section 23 counts the elapsed time period from the detection of the disappearance of the arrhythmia with the internal timer. When the counted elapsed time period reaches a predetermined value, the control section 23 automatically stops recording the electrocardiogram data in the recording section 21.
  • the electrocardiograph 2 may be provided with a communicating section 25.
  • the communicating section 25 is configured to wirelessly transmit the electrocardiogram data recorded in the recording section 21 to the device 3.
  • the communicating section 25 may be configured as a communication interface capable of establishing wireless communication with the short-range wireless communicating section 31 of the device 3. That is, the communication interface constituting the detecting section 22 can be at least partially shared.
  • the device 3 When the electrocardiogram data is transmitted to the device 3 by the communicating section 25, the device 3 may be provided with an analysis section 34 as illustrated in Fig. 2.
  • the analysis section 34 is configured to analyze the electrocardiogram data transmitted by the communicating section 25 and detect the presence of an arrhythmia. Since the processing per se for detecting the presence or absence of the arrhythmia based on the acquired electrocardiogram data is known, detailed descriptions thereof will be omitted.
  • the stop condition may include the elapse of a predetermined time period from the time when the disappearance of the arrhythmia is detected by the analysis section 34.
  • the control section 33 counts the elapsed time period from the detection of the disappearance of the arrhythmia with the internal timer. When the counted elapsed time period reaches a predetermined value, the control section 33 generates a stop instruction signal, and causes the short-distance wireless communicating section 31 to transmit the generated stop instruction signal. If communication is established between the communicating section 25 and the short-range wireless communicating section 31, a stop instruction signal is received by the communicating section 25.
  • the control section 23 of the electrocardiograph 2 determines that the stop condition is satisfied based on the fact that the stop instruction signal is received by the communicating section 25.
  • the analysis section 24 can be omitted from the electrocardiograph 2.
  • the device 3 may be provided with a communicating section 35.
  • the communicating section 35 may be configured to transfer the electrocardiogram data received from the electrocardiograph 2 to a predetermined server device SV via a wireless communication network.
  • the wireless communication network may include a wireless LAN, a cellular telephone communication network, the Internet, and the like.
  • Examples of the device 3 provided with the communicating section 35 include a smart phone, a tablet terminal, and a notebook personal computer.
  • the server device SV may be a general-purpose mail server device or a dedicated web server device.
  • the data transmitted to the server device SV may take various forms.
  • the data may be binary data, which is electrocardiogram data itself, or may be data in a file format provided as an image or report processed to include electrocardiogram data.
  • the server device SV is a general-purpose mail server device
  • electrocardiogram data is sent to a mail address registered in the mail server device. By opening the mail, it is possible to confirm and diagnose electrocardiogram data in a remote place.
  • the server device SV is a dedicated web server device, a plurality of medical workers can share, irrespective of places, electrocardiogram data through a dedicated web page.
  • At least some of the functions of at least one of the interface 20, the detecting section 22, and the control section 23 in the electrocardiograph 2 may be realized by at least one processor and at least one memory.
  • the processor may include a CPU and an MPU.
  • a processor may be provided with a plurality of processor cores.
  • Examples of the memory may include ROM and RAM.
  • a program for realizing the above functions can be stored in the ROM.
  • the processor may designate at least a part of a program stored in the ROM and load the program on the RAM in order to realize the above-described functions in cooperation with the RAM.
  • At least a part of the functions of the detecting section 22 and the control section 23 in the electrocardiograph 2 may be realized by at least one hardware resource such as an integrated circuit such as an ASIC or an FPGA, that is different from the above-described processor and memory.
  • At least a part of the functions of at least one of the control section 33 and the analysis section 34 in the device 3 can be realized by at least one processor and at least one memory.
  • the processor may include a CPU and an MPU.
  • a processor may be provided with a plurality of processor cores.
  • Examples of the memory may include ROM and RAM.
  • a program for realizing the above functions can be stored in the ROM.
  • the processor may designate at least a part of a program stored in the ROM and load the program on the RAM in order to realize the above-described functions in cooperation with the RAM.
  • At least a part of the functions of the control section 33 and the analysis section 34 in the electrocardiograph 2 may be realized by at least one hardware resource such as an integrated circuit such as an ASIC or an FPGA, that is different from the above-described processor and memory.
  • the electrocardiograph 2 may be provided with a condenser 26.
  • the condenser 26 temporarily stores the electric power received from the device 3 via the contactless power supply.
  • the condenser 26 is connected in parallel with the receiving coil 221, for example.
  • the electric power temporarily stored in the condenser 26 can be supplied to at least the recording section 21 even after the non-contact power supply from the device 3 is canceled.
  • the communicating section 25 may be configured to wirelessly transmit the electrocardiogram data recorded in the recording section 21 to a dedicated external device EX.
  • the communicating section 25 is configured as a communication interface capable of establishing wireless communication with the external device EX of the transmission destination.
  • the electrocardiogram data transmitted to the external device EX may be subjected to storage processing, analysis processing, edit processing, and the like.
  • the data processed by the external device may be transmitted to a predetermined server device SV via a communication network.
  • the electrocardiogram data recorded in the recording section 21 can be directly read out by the dedicated external device EX.
  • the data may be read out via a wired connection, or may be transferred by transferring the portable storage medium on which the electrocardiogram data is recorded from the electrocardiograph 2 to the external device EX.
  • the electrocardiogram data transferred to the external device EX may be subjected to storage processing, analysis processing, edit processing, and the like.
  • the data processed by the external device may be transmitted to a predetermined server device SV via a communication network.
  • signals from the plurality of electrodes E are input to the interface 20 of the electrocardiograph 2.
  • a configuration in which a signal from a single electrode E is input to the interface 20 may also be employed.
  • the electrocardiograph 2 When the electrocardiograph 2 is equipped with a battery for supplying electric power necessary for recording electrocardiograph data, it is not necessarily required to provide a power source on the side of the device 3 in order to perform the short-range wireless communication described above.
  • the device 3 may be an IC card having excellent portability. In this case, it is possible to further reduce the burden on the subject S who is engaged in a long-term examination.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
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  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Abstract

L'invention concerne un électrocardiographe (2) étant configuré pour être porté par un sujet (S). Une section d'enregistrement (21) est configurée pour enregistrer des données d'électrocardiogramme du sujet (S). Une section de détection (22) est configurée pour détecter une approche d'un dispositif portable (3) ayant une fonction pour effectuer une communication sans fil à courte portée. Une section de commande (23) est configurée pour démarrer l'enregistrement des données d'électrocardiogramme dans la section d'enregistrement (21) dans un cas où il est satisfait une condition de démarrage comprenant le fait que l'approche du dispositif (3) est détectée par la section de détection (22).
PCT/JP2019/002282 2018-02-02 2019-01-24 Électrocardiographe portable et système d'électrocardiographie WO2019151103A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/958,366 US11806153B2 (en) 2018-02-02 2019-01-24 Portable electrocardiograph and electrocardiography system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2018017136 2018-02-02
JP2018-017136 2018-02-02
JP2018-189957 2018-10-05
JP2018189957A JP2019130287A (ja) 2018-02-02 2018-10-05 携帯型心電図記録器、および心電図記録システム

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WO2019151103A1 true WO2019151103A1 (fr) 2019-08-08

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08299293A (ja) 1995-05-12 1996-11-19 Maitetsuku:Kk ホルタ心電計装置
US20140246924A1 (en) * 2013-03-04 2014-09-04 Hello Inc. Telemetry system with wireless power receiver and monitoring devices
US20160262619A1 (en) * 2015-03-11 2016-09-15 Medicomp, Inc. Wireless ecg sensor system and method
US20160338646A1 (en) * 2015-05-20 2016-11-24 Mc10, Inc. Ultra-thin wearable sensing device
JP2018017136A (ja) 2016-07-26 2018-02-01 日本電産トーソク株式会社 電動ポンプ
JP2018189957A (ja) 2017-04-28 2018-11-29 キヤノン株式会社 電子写真感光体、プロセスカートリッジ及び電子写真装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08299293A (ja) 1995-05-12 1996-11-19 Maitetsuku:Kk ホルタ心電計装置
US20140246924A1 (en) * 2013-03-04 2014-09-04 Hello Inc. Telemetry system with wireless power receiver and monitoring devices
US20160262619A1 (en) * 2015-03-11 2016-09-15 Medicomp, Inc. Wireless ecg sensor system and method
US20160338646A1 (en) * 2015-05-20 2016-11-24 Mc10, Inc. Ultra-thin wearable sensing device
JP2018017136A (ja) 2016-07-26 2018-02-01 日本電産トーソク株式会社 電動ポンプ
JP2018189957A (ja) 2017-04-28 2018-11-29 キヤノン株式会社 電子写真感光体、プロセスカートリッジ及び電子写真装置

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