JP2009082364A - Portable electrocardiograph - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable electrocardiograph capable of accurately measuring electrocardiographic waveforms by either a main body electrode part and an external electrode part. <P>SOLUTION: The portable electrocardiograph includes a body 100 having a processing circuit 150, and an external electrode unit 200. The body 100 includes: an opening/closing cover 130A provided on the surface thereof; a terminal 131 which is covered with the cover 130A when the cover 130A is in a closed state and with which a connector part 210 connected electrically to the external electrode ELb can be connected when the cover 130A is in an open state; the body electrode part ELa; and switching means 134 and 135 for bringing the processing circuit 150 and the main electrode ELa into a conduction state when the cover 130A is in the closed state and bringing the processing circuit 150 and the main electrode ELa into a non-conduction state when the cover 130A is in the open state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electrocardiograph, and in particular, an electrocardiogram waveform by two types of measurement methods: measurement by a main body electrode portion provided in the apparatus main body and measurement by an external electrode section connectable to the apparatus main body via a cable. Relates to a portable electrocardiograph capable of measuring

  Conventionally, there is a portable electrocardiograph that can be always carried by a subject having anxiety about the heart. The electrocardiographic waveform data stored in such an electrocardiograph is later used for diagnosis by a specialist.

  In order to present the electrocardiogram waveform data collected by such a portable electrocardiograph to a specialist, a portable electrocardiograph capable of connecting an external terminal has been proposed. For example, Patent Document 1 discloses a portable electrocardiograph in which a terminal for outputting biological information to an external terminal such as a PC is covered with a cover. When the cover is opened, a switch between a measurement electrode and an amplifier is disclosed. Is described as being in a non-conductive state. According to the present invention, when an electrocardiograph is to be connected to an external terminal in a hospital, the measurement electrode and the amplifier are in a non-conductive state, so that an electric shock accident can be prevented.

In relation to this, Patent Document 2 discloses that an electrocardiograph having a configuration in which a measurement electrode is pulled out from the apparatus main body using a connection cable is connected to the electrocardiograph apparatus main body and the measurement electrode. To take measures against electric shock by adopting a configuration in which a connection cable for connecting an electrocardiograph device body and an external terminal cannot be connected to the electrocardiograph device body at the same time. Has been.
Japanese Patent Laid-Open No. 2005-211387 Japanese Utility Model Publication No. 5-9509

  By the way, as a measurement electrode of a portable electrocardiograph, one provided on the outer surface of the apparatus main body (main electrode part) and one having a configuration drawn from the apparatus main body using a connection cable (external electrode part) There are two types.

  In the case of the former measurement electrode, there is an advantage that an electrocardiographic waveform can be easily measured without complicated operations even outside the hospital (for example, at home or when going out). Therefore, even if a seizure occurs, an electrocardiogram waveform can be taken on the spot.

  In the case of the latter measurement electrode, since it is not necessary for the subject to press the electrode against his / her body during measurement, noise due to myoelectricity etc. should be removed compared to the case where measurement is performed using the former measurement electrode. There is an advantage that an electrocardiogram waveform can be measured with high accuracy.

  Therefore, a portable electrocardiograph capable of measuring an electrocardiographic waveform at both the main body electrode portion and the external electrode portion is useful.

  However, in Patent Documents 1 and 2 described above, when the portable electrocardiograph is connected to an external terminal, it is disclosed that the measurement electrode and the amplifier are in a non-conductive state. In a portable electrocardiograph capable of performing both measurement and measurement using an external electrode unit, no proposal has been made for acquiring highly accurate electrocardiographic waveform data.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a portable electrocardiograph capable of measuring an electrocardiographic waveform with high accuracy in both the main body electrode portion and the external electrode portion. Is to provide.

  A portable electrocardiograph according to an aspect of the present invention includes a housing including a processing circuit for processing an electrical signal detected from a living body, an external electrode portion, a first connector portion for connection to the housing, And an external electrode unit including a first cable for electrically connecting the external electrode portion and the connector portion. The housing includes a lid that can be opened and closed provided on the surface of the housing, and is covered by the lid when the lid is in a closed state, and the first connector portion when the lid is in an open state When the lid is in a closed state, the first circuit is connectable between the processing circuit and the body electrode, and the lid is in an open state. In some cases, switching means for switching between the processing circuit and the main body electrode portion to non-conduction is included.

  Preferably, the casing is an electrode for determining which one of the main body electrode portion and the external electrode portion is connected to the processing circuit based on the detection means for detecting opening / closing of the lid and the output from the detection means It further includes a determining means and a storage means for storing the electrocardiographic waveform data processed by the processing circuit in association with the determination result by the electrode determining means.

  Preferably, the housing is for reading the electrocardiographic waveform data and the determination result stored in the storage unit, and displaying the electrocardiographic waveform data read by the reading unit and the determination result in association with each other. It further includes display control means for generating a signal and display means for performing display according to the output from the display control means.

  Preferably, the second connector portion for connecting to the housing, the third connector portion for connecting to the external terminal, and the second connector portion and the third connector portion are electrically connected. And an external terminal unit including the second cable, wherein the housing is covered by the lid when the lid is in a closed state, and the second connector portion is connected when the lid is in an open state. A possible second terminal is further included.

  The first connector part preferably has a first shielding part that makes the second terminal and the second connector part inaccessible when connected to the first terminal.

  Moreover, it is preferable that a 2nd connector part has a 2nd shielding part which cannot connect a 1st terminal and a 1st connector part in the state connected with the 2nd terminal.

  Preferably, the main body electrode unit includes a plurality of electrodes, and the switching unit includes a plurality of switches corresponding to the plurality of electrodes.

Preferably, the casing further includes notification means for reporting the open / closed state of the lid.
A portable electrocardiograph according to an aspect of the present invention includes a housing including a processing circuit for processing an electrical signal detected from a living body, an openable / closable lid provided on a surface of the housing, and a lid Provided on the surface of the housing, with a terminal that can be connected to a connector portion that is covered with a lid when the lid is in the closed state and is electrically connected to the external electrode portion when the lid is in the open state. When the lid is closed, the processing circuit and the main body electrode portion are made conductive, and when the lid is open, the processing circuit and the main body electrode portion are made non-conductive. Switching means for switching.

  According to the present invention, the first terminal for connecting the external electrode unit is covered with the lid when the lid is in the closed state, and the processing circuit and the main body when the lid is in the open state. The electrode part is made non-conductive. For this reason, when the external electrode unit and the casing (main body) are connected, the processing circuit and the main body electrode portion are always disconnected.

  Therefore, in a portable electrocardiograph capable of measuring both the main body electrode portion and the external electrode portion, noise caused by the other electrode portion is removed regardless of whether the measurement is performed with either the main body electrode portion or the external electrode portion be able to. Therefore, an electrocardiographic waveform can be measured with high accuracy regardless of which electrode unit is used for measurement.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
(External configuration)
First, the external structure of the portable electrocardiograph 1 in the present embodiment will be described. 1 and 2 are schematic perspective views of portable electrocardiograph 1 according to the embodiment of the present invention. FIG. 3 is a front view of portable electrocardiograph 1 shown in FIG. 4 is a top view when the lid is closed in the portable electrocardiograph 1 shown in FIG. 1, and FIG. 5 is a bottom view. 6 is a right side view of the portable electrocardiograph 1 shown in FIG. 1, and FIG. 7 is a left side view.

  1 to 7, portable electrocardiograph 1 according to the present embodiment is small in size and weight that can be held with one hand so as to be excellent in portability. It is lighter. The portable electrocardiograph 1 includes a device main body (housing) 100 having a flat and slender substantially rectangular parallelepiped shape, and its outer surfaces (front surface 101, back surface 102, top surface 103, bottom surface 104, right side surface 105). Further, a display unit, an operation unit, a measurement electrode, and the like are arranged on the left side surface 106).

  As shown in FIGS. 1 to 3, a measurement button 142 for instructing the start of measurement is provided on one end side in the longitudinal direction (in the direction of arrow A in the figure) of the front surface 101 of the apparatus main body 100. On the end side, an alignment mark 118 and a display unit 148 are provided. The alignment mark 118 is arranged to serve as a mark when the apparatus main body 100 is pressed against the abdomen in a first measurement posture as will be described later. The display unit 148 is configured by a liquid crystal display, for example, and displays measurement results and the like.

  As shown in FIGS. 1 and 4, a power button 141 is disposed at a predetermined position on the upper surface 103 of the apparatus main body 100. The power button 141 is an operation button for operating ON / OFF of the portable electrocardiograph 1. Further, two covers 130 </ b> A and 130 </ b> B that are lids are provided at predetermined positions on the upper surface 103 of the apparatus main body 100. The cover 130A is provided so as to cover an external electrode terminal (hereinafter referred to as “external electrode socket”) 131 and an external terminal terminal (hereinafter referred to as “external terminal socket”) 132, which will be described later, in the closed state. The cover 130B is provided so as to cover a memory terminal 133 (hereinafter referred to as “memory socket”) to which an external storage medium (not shown) is mounted in the closed state. These covers 130A and 130B are attached to the apparatus main body 100 so as to be openable and closable.

  As shown in FIGS. 2 and 5, various operation buttons are arranged at predetermined positions on the lower surface 104 of the apparatus main body 100. Further, a cover 130 </ b> C that covers a battery housing part (not shown) included in the apparatus main body 100 is disposed at a predetermined position on the lower surface 104.

  In the illustrated portable electrocardiograph 1, a memory button 143, a determination button 144, a left scroll button 145, and a right scroll button 146 are arranged. Here, the memory button 143 is an operation button for inputting a reading instruction of the measurement result stored in the portable electrocardiograph 1, and the determination button 144 is an operation button used for executing each operation. . The left scroll button 145 and the right scroll button 146 are operation buttons for scrolling and displaying measurement result graphs, guide information, and the like displayed on the display unit 148.

  As shown in FIG. 1 and FIG. 6, the right side surface 105 located at one end in the longitudinal direction of the apparatus main body 100 has a negative electrode 121 </ b> A that is one of a pair of measurement electrodes and a change in body potential. An indifferent electrode 123A for deriving a reference potential is disposed. The right side surface 105 has a shape that is smoothly curved so that the index finger of the right hand of the subject fits when the subject takes a first measurement posture described later. Further, the right side surface 105 is formed with a recess 105a extending in the vertical direction. The recess 105a is shaped to receive the index finger of the subject's right hand.

  The negative electrode 121A and the indifferent electrode 123A described above are formed of a conductive member. Further, the negative electrode 121 </ b> A and the indifferent electrode 123 </ b> A are arranged so that the surfaces thereof are exposed on the outer surface of the apparatus main body 100 in the recess 105 a provided on the right side surface 105. The negative electrode 121A is located near the upper surface 103 of the right side surface 105, and the indifferent electrode 123A is located near the lower surface 104 of the right side surface 105.

  As shown in FIGS. 2 and 7, a positive electrode 122 </ b> A that is the other electrode of the pair of measurement electrodes is disposed on the left side surface 106 that is located at the other end in the longitudinal direction of the apparatus main body 100.

  In the portable electrocardiograph 1 according to the present embodiment, an external electrode connection unit 200 and an external terminal connection unit 300 as shown below can be connected.

  FIG. 8 is a diagram showing an external electrode connection unit 200 that can be connected to the apparatus main body 100 of the portable electrocardiograph 1 according to the embodiment of the present invention. FIG. 9 is a view showing a state in which the cover 130A provided on the apparatus main body 100 of the portable electrocardiograph 1 is opened. FIG. 10 is a diagram illustrating a state in which the external electrode connection unit 200 and the external terminal connection unit 300 are connected to the apparatus main body 100 of the portable electrocardiograph 1.

  Referring to FIG. 8, external electrode connection unit 200 is a clip-type unit, and includes connector portion 210, negative electrode 121B, positive electrode 122B, indifferent electrode 123B, connector portion 210 and three electrodes 121B and 122B. , 123B are electrically connected to each other. The negative electrode 121B, the positive electrode 122B, and the indifferent electrode 123B are provided on the clips 231, 232, and 233, respectively. The connector part 210 has a male terminal 212 to be inserted into the external electrode socket 131 of the apparatus main body 100.

  In the following description, the negative electrode 121A, the positive electrode 122A, and the indifferent electrode 123A provided on the surface of the apparatus main body 100 are referred to as “main electrode part ELa”, the negative electrode 121B provided in the external electrode connection unit 200, the positive electrode The electrode 122B and the indifferent electrode 123B are referred to as “external electrode portion ELb”.

  Referring to FIG. 9, in the state where cover 130 </ b> A is opened, opening 131 a of external electrode socket 131 and opening 132 a of external terminal socket 132 are arranged side by side in the longitudinal direction of apparatus main body 100. These openings 131a and 132a are covered (closed) by the cover 130A when the cover 130A is closed.

  With reference to FIGS. 8 and 10, the external electrode connector portion 210 has a shielding portion 213 that covers the opening 132 a of the external terminal socket 132 in a state of being connected to the external electrode socket 131. Therefore, when the cover 130 </ b> A is opened and the terminal 212 is inserted into the external electrode socket 131 provided in the apparatus main body 100, the opening 132 a of the external terminal socket 132 is blocked by the shielding part 213 of the connector part 210.

  Referring to FIG. 10, an external terminal connection unit 300 includes a connector part 310 for an external terminal, a connector 330 (not shown in FIG. 10) for connecting to the external terminal (connector thereof), a connector part 310, and a connector. And a cable 320 for electrically connecting to the H.330.

  Similarly to the external electrode connector section 210, the external terminal connector section 310 also has a shielding section 313 that covers the opening 131 a of the external electrode socket 131 when connected to the external terminal socket 132. Therefore, when the cover 130 </ b> A is opened and the terminal 312 is inserted into the external terminal socket 132 provided in the apparatus main body 100, the opening 131 a of the external electrode socket 131 is blocked by the shielding part 313 of the connector part 310.

  Therefore, when the external electrode connection unit 200 is connected to the apparatus main body 100, the connection between the external terminal connection unit 300 and the apparatus main body 100 becomes impossible. Similarly, when the external terminal connection unit 300 is connected to the apparatus main body 100, the connection between the external electrode connection unit 200 and the apparatus main body 100 becomes impossible.

  The portable electrocardiograph 1 according to the present embodiment includes at least the external electrode connection unit 200, and more preferably includes the external electrode connection unit 200 and the external terminal connection unit 300.

  In the present embodiment, the clip-type external electrode connection unit 200 is taken as an example, but the clip-type external electrode connection unit 200 is not limited to the clip-type.

(About measurement posture)
Next, a state in which the subject is measuring an electrocardiographic waveform using the portable electrocardiograph 1 according to the embodiment of the present invention will be described.

  A measurement posture (hereinafter referred to as a “first measurement posture”) when the subject measures an electrocardiogram waveform with the body electrode portion ELa will be described with reference to FIGS. FIG. 14 shows a measurement posture (hereinafter referred to as a “second measurement posture”) when measuring the above.

First, the first measurement posture will be described.
FIG. 11 is a perspective view showing the first measurement posture, and FIG. 12 is a view of the first measurement posture as viewed from above.

  At the time of measurement, the subject 500 first closes the cover 130 </ b> A provided on the apparatus main body 100. A state in which the main body electrode portion ELa (the negative electrode 121A, the positive electrode 122A, and the indifferent electrode 123A) is electrically connected to the processing circuit 150 provided in the apparatus main body 100 by closing the cover 130A. Thus, a standby state in which an electrocardiogram waveform can be measured is entered. The electrical switching mechanism will be described later.

  Next, as shown in FIGS. 11 and 12, the subject 500 holds the left side surface located at the other end of the apparatus main body 100 while holding the right end 510 near one end of the apparatus main body 100 of the portable electrocardiograph 1. The positive electrode 122 </ b> A provided at 106 is brought into direct contact with the skin on the fifth intercostal anxillary line located at the lower left side of the chest 550. Then, the measurement button 142 provided on the front surface 101 of the apparatus main body 100 is pressed with the thumb 511 of the right hand 510. The electrocardiographic waveform is measured while maintaining this state for about several tens of seconds.

  A gripping state by the right hand 510 of the portable electrocardiograph 1 at this time will be described. FIG. 13 is a diagram illustrating a gripping state by the subject of the apparatus main body 100 of the portable electrocardiograph 1 in the first measurement posture.

  As shown in FIG. 13, in the first measurement posture, the subject 500 places his right hand near one end in the longitudinal direction of the apparatus main body 100 so that the front surface 101 of the apparatus main body 100 of the portable electrocardiograph 1 faces upward. Grip at 510. At this time, the right side surface 105 of the apparatus body 100 is covered with the index finger 512 of the right hand 510, the thumb 511 of the right hand 510 is pressed against the front surface 101 of the apparatus body 100, and the middle finger of the right hand 510 is pressed against the back surface of the apparatus body 100. Then, the apparatus main body 100 is gripped so as to be sandwiched. In this state, the index finger 512 of the right hand 510 is lightly bent along the curved right side surface 105, inserted into the concave portion 105a provided on the right side surface 105, and the negative electrode 121A provided in the concave portion 105a and indifferent. The state is in contact with the electrode 123A.

  By taking the above first measurement posture, the negative electrode 121A and the indifferent electrode 123A located on the right side surface 105 of the apparatus main body 100 of the portable electrocardiograph 1 come into contact with the index finger 512 of the right hand 510 of the subject 500, The positive electrode 122 </ b> A located on the left side surface 106 of the apparatus main body 100 comes into contact with the chest 550 of the subject 500. Thus, the subject is in order of the right hand 510 in contact with the negative electrode 121A, the non-contact forearm 520 on the chest 550, and the chest 550 in which the positive electrode 122A is attached to the chest 550 via the non-contact upper arm 530 and the right shoulder 540. A measurement circuit is configured on the body.

  As described above, an action potential generated by the activity of the myocardium is detected as a potential difference generated between the negative electrode 121A and the positive electrode 122A, which are measurement electrodes, and a processing circuit described later provided in the portable electrocardiograph 1 By being processed by 150, it becomes possible to obtain cardiac information including an electrocardiographic waveform.

  As described above, in the first measurement posture, the electrocardiogram waveform can be measured by a simple operation of simply holding the portable electrocardiograph 1 with the right hand 510 and pressing it against the chest 550. Therefore, even if a seizure occurs, measurement can be started immediately.

Next, the second measurement posture in the present embodiment will be described.
As the second measurement posture, a supine posture is preferably taken. FIG. 14 is a diagram showing an arrangement example of the external electrode portion ELb (each electrode 121B, 122B, 123B included in the clips 231, 232, 233) in the second measurement posture, and FIG. FIG. 14B is a diagram illustrating an arrangement example of the external electrode portion ELb based on CC5 induction.

  Referring to FIG. 14 (A), in the CM5 induction, the test subject has the skin at the upper sternum of his / her chest 550, the skin on the fifth anterior axilla line, and the region near the right shoulder of the chest 550 (under the right clavicle). The electrode pad PD is affixed to the skin corresponding to about 1/3 from the outside of the skin. Each electrode pad PD has a protrusion, and the protrusion is sandwiched between clips 231 to 233 of the external electrode connection unit 200. Specifically, the clip 231 is sandwiched between the electrode pad PD on the upper end of the sternum, the clip 232 is sandwiched between the electrode pad PD on the fifth anterior axillary line, and the clip 233 is disposed on the electrode pad PD on the right shoulder portion of the chest 550. Between. Thereafter (or before), the subject opens the cover 130A of the apparatus main body 100 and inserts the terminal 212 of the external electrode connection unit 200 into the external electrode socket 131 exposed on the upper surface 103 side of the apparatus main body 100. In this state, when the measurement button 142 of the portable electrocardiograph 1 is pressed, the electrocardiographic waveform is measured by CM5 (V5 similar induction) guidance.

  Referring to FIG. 14 (B), in CC5 induction, the subject has the right skin on the fifth anterior axillary line of his chest 550, the skin on (the left side of) the fifth anterior axillary line, and the chest 550. The electrode pad PD is affixed to the skin corresponding to the part closer to the right shoulder of. The protruding portion of each electrode pad PD is sandwiched between clips 231 to 233 of the external electrode connection unit 200. Specifically, the clip 231 is sandwiched between the right electrode pad PD on the fifth anterior axillary line, the clip 232 is sandwiched between the electrode pads PD on (the left side of) the fifth anterior axillary line, and closer to the right shoulder of the chest 550 The clip 233 is sandwiched between the electrode pads PD on the site. Thereafter (or before), the subject opens the cover 130A of the apparatus main body 100 and inserts the terminal 212 of the external electrode connection unit 200 into the external electrode socket 131 exposed on the upper surface 103 side of the apparatus main body 100. In this state, by pressing the measurement button 142 of the portable electrocardiograph 1, the electrocardiographic waveform is measured by CC5 induction (V5 similar induction).

  As shown in FIGS. 14 (A) and 14 (B), in the second measurement posture, the subject only has to hold the clips 231 to 233 between the electrode pads PD attached to his / her chest 550. There is no need to be aware of the measurement circuit configured in the first measurement posture. Moreover, since the adsorptivity to the measurement site is good, the electrocardiographic waveform can be stably measured. In addition, since there is no need to hold the apparatus main body 100 with the right hand as in the first measurement posture, the possibility that the electrocardiogram waveform includes myoelectricity generated in the right arm, wrist, palm, and finger as noise is significantly reduced.

  Note that the attachment position of the external electrode portion ELb based on the second measurement posture is not limited to that based on the CM5 guidance and CC5 guidance described above. However, since the analysis result may not be appropriate when measured by other than the V4 and V5 similar leads, the subject is prompted to take a measurement posture based on the CM5 lead or the CC5 lead when using the external electrode portion ELb. It is desirable to display. At this time, such a display may be displayed when an open / close sensor 170 described later detects that the cover 130A is in an open state.

(About configuration)
Next, the configuration of the portable electrocardiograph 1 in the present embodiment will be described.

  FIG. 15 is a block diagram showing a hardware configuration of portable electrocardiograph 1 in the present embodiment.

  Referring to FIG. 15, apparatus main body 100 of portable electrocardiograph 1 includes main body electrode portion ELa, processing circuit 150 for processing an electrocardiogram waveform detected by main body electrode portion ELa and external electrode portion ELb, , An open / close sensor 170 for detecting the opening / closing of the cover 130A, a power supply 160, and an operation unit including the power button 141, the measurement button 142, the memory button 143, the determination button 144, the left scroll button 145, and the right scroll button 146. 140, a display unit 148, the above-described covers 130A and 130B, and switches 41, 42, and 43 (FIG. 16) for switching conduction / non-conduction between the main body electrode unit ELa and the processing circuit 150.

  The processing circuit 150 converts an analog signal into a digital signal, an amplifier circuit 151 that amplifies a biological signal (electric signal) detected by the main body electrode portion ELa and the external electrode portion ELb, a filter circuit 152 that removes a noise component, and the like. An A / D (Analog to Digital) converter 153, a CPU (Central Processing Unit) 154 that is an arithmetic processing unit, and a memory 155 are included. The memory 155 includes a ROM (Read Only Memory) 1551, a RAM (Random Access Memory) 1552, and a non-volatile memory such as a flash memory 1553.

  The biological signal (electrical signal) detected by either the main body electrode portion ELa or the external electrode portion ELb is amplified by the amplifier circuit 151, and then the noise component is removed by the filter circuit 152. Further, the A / D converter 153 Is converted into electrocardiographic waveform data (digital signal). The CPU 154 stores the electrocardiographic waveform data converted by the A / D converter 153 in the flash memory 1553. In addition, the CPU 154 receives command signals from various operation buttons included in the operation unit 140, executes processing according to the received command signals, and performs display control on the display unit 148.

  The switch 41 switches conduction / non-conduction between the negative electrode 121A and the amplifier circuit 151, and the switch 42 switches conduction / non-conduction between the positive electrode 122A and the amplifier circuit 151. The switch 43 switches between conduction / non-conduction between the indifferent electrode 123A and the amplifier circuit 151. In the present embodiment, each switch 41, 42, 43 includes a first contact 134 electrically connected to each electrode and a second contact 135 electrically connected to the amplifier circuit 151. Yes.

  FIG. 16 is a view for explaining ON / OFF of a switch accompanying opening / closing of the cover 130A, and FIG. 16A is a partial cross-sectional view of the apparatus main body 100 showing a state in which the cover 130A is closed. FIG. 16B is a partial cross-sectional view of the apparatus main body 100 showing a state in which the cover 130A is opened.

  As shown in FIGS. 16A and 16B, a frame 40, switches 41, 42, 43, 170, and a spring 50 are provided inside the apparatus main body 100 at a portion corresponding to the position where the cover 130A is provided. A slider 60, an external electrode socket 131, and an external terminal socket 132 are disposed.

  The frame 40 is fixed so as not to move with respect to the apparatus main body 100. The cover 130 </ b> A has a rotation shaft 52 a on its side portion 52. The rotating shaft 52 a is inserted into an opening provided in the frame 40. Thereby, the cover 130 </ b> A is rotatably attached to the frame 40.

  The slider 60 is slidably attached to the frame 40. More specifically, the slider 60 is connected to the frame 40 via a spring 50, and the spring 50 biases the slider 60 toward the cover 130A. Thereby, the slider 60 is maintained in a state in which the end portion thereof is in contact with the side portion 52 of the cover 130A. The slider 60 is configured to be guided with respect to the frame 40 by a guide mechanism (not shown). As described above, the slider 60 is slidable in the vertical direction in the drawing.

  Note that the side portion 52 of the cover 130A is formed in a shape such that the distance from the rotating shaft 52a to the surface with which the end of the slider 60 abuts (hereinafter referred to as the end abutment surface) varies depending on the location. More specifically, compared to the distance from the rotation shaft 52a to the end contact surface when the cover 130A is in the open state, the distance from the rotation shaft 52a to the end contact surface when the cover 130A is in the closed state. It is formed in a shape that increases the distance.

  The switches 41, 42, 43, and 170 are so-called micro switches, and each includes a switch body and a switch terminal. The switches 41, 42, 43, and 170 are arranged side by side in the longitudinal direction of the apparatus main body 100. The switch terminals 41a, 42a, 43a, and 170a are rotatably attached to the switch body, and are biased in a direction away from the switch body by a spring (not shown). The switches 41, 42, 43, and 170 are turned off when the switch terminals 41a, 42a, 43a, and 170a are moved away from the switch body, and the switch terminals 41a, 42a, and 43a are resisted against the biasing force of the spring. , 170a is turned on in the state where it is pushed down toward the switch body. Based on the switching of the ON state / OFF state, the switches 41, 42, and 43 switch between conduction / non-conduction between the main body electrode portion ELa and the processing circuit 150 in conjunction with opening / closing of the cover 130A. The switch 170 functions as the open / close sensor described above, and has a first contact and a second contact (not shown) inside, as with the other switches 41, 42, 43.

  Four protrusions 61, 62, 63, 64 are provided on the end of the slider 60 opposite to the end contacting the cover 130 </ b> A (that is, the lower end in the figure). These protrusions 61, 62, 63, and 64 are provided at positions corresponding to the switches 41, 42, 43, and 170, respectively.

  An external electrode socket 131 and an external terminal socket 132 are disposed inside the slider 60. Each socket 131 and 132 is arrange | positioned so that the opening parts 131a and 132a mentioned above may be faced.

  Referring to FIG. 16A, when cover 130A is closed, slider 60 is pushed down by cover 130A against the biasing force of spring 50. Therefore, the four protrusions 61, 62, 63, and 64 of the slider 60 are in contact with the switch terminals 41a, 42a, 43a, and 170a that are the terminals of the switches 41, 42, 43, and 170, respectively, and the switch terminals 41a, 42a, and 43a and 170a are pressed toward each switch body. Accordingly, the first contact 134 provided inside the switches 41, 42, and 43 is pushed down toward the second contact 135, and the first contact 134 and the second contact 135 are in contact with each other. That is, the first contact 134 and the second contact 135 are electrically connected, and the switches 41, 42, and 43 are turned on. Similarly, in the switch 170, a first contact and a second contact (not shown) are brought into contact with each other to be in a conductive state, and the switch 170 is turned on. At this time, since the cover 130A is closed, the opening 131a of the external electrode socket 131 and the opening 132a of the external terminal socket 132 are closed by the cover 130A.

  Referring to FIG. 16B, when cover 130 </ b> A is released from the closed state, slider 60 slides in the direction of arrow 70 due to the urging force of spring 50. Therefore, the four protrusions 61, 62, 63, 64 of the slider 60 also move upward in the drawing. Thereby, the protrusions 61, 62, 63, and 64 are separated from the switch terminals 41a, 42a, 43a, and 170a, respectively. As a result, the first contact 134 also rotates in the direction opposite to the direction in which the second contact 135 is located, and returns to the original position. As a result, the first contact 134 and the second contact 135 are not in contact with each other. That is, the first contact 134 and the second contact 135 are not electrically connected, and the switches 41, 42, and 43 are turned off. Similarly, the switch 170 is turned off. At this time, since the cover 130A is opened, the opening 131a of the external electrode socket 131 and the opening 132a of the external terminal socket 132 are exposed on the surface of the apparatus main body 100.

  Thus, in the portable electrocardiograph 1 according to the present embodiment, the first contact 134 and the second contact 135 are switched between a conductive state and a non-conductive state in conjunction with the operation of the cover 130A. Therefore, when the cover 130A is in the closed state, the main body electrode portion ELa is electrically connected to the processing circuit 150 provided inside the apparatus main body 100, and the electrocardiographic waveform can be measured by the main body electrode portion ELa. Become so. Further, since the opening 131a of the external electrode socket 131 for connecting to the external electrode connection unit 200 is blocked by the cover 130A, the external electrode connection unit 200 cannot be physically connected to the external electrode socket 131. Therefore, it is possible to prevent the electric signal from the external electrode part ELb from being mixed into the amplifier circuit 151 as noise.

  On the other hand, when the cover 130A is in the open state, the main body electrode portion ELa is disconnected from the processing circuit 150 provided inside the apparatus main body 100, and even if the main body electrode portion ELa is pressed against the skin, The shape cannot be measured. On the other hand, since the opening 131a of the external electrode socket 131 for connecting to the external electrode connection unit 200 is exposed, the external electrode connection unit 200 can be connected to the external electrode socket 131. That is, when the cover 130A is in the open state, only measurement by the external electrode portion ELb is possible. Even in that case, since the electric signal from the main body electrode portion ELa is not mixed as noise into the amplifier circuit 151, the noise can be surely removed even in the measurement using the external electrode connection unit 200. it can. As a result, highly accurate electrocardiographic waveform data can be obtained.

  As described above, the portable electrocardiograph 1 according to the present embodiment has a simple configuration in which the switches 41 to 43 are simply provided between the main body electrode portion ELa and the processing circuit 150 (amplifier circuit 151). Therefore, an accurate electrocardiographic waveform can be measured by any of the measurement methods, so that the size of the apparatus and the manufacturing cost are not increased. However, as long as the conduction / non-conduction between the main body electrode portion ELa and the processing circuit 150 can be switched in conjunction with the opening / closing of the cover 130A, the sensor is not limited to a switch.

  In the present embodiment, the case where the cover 130A is attached to the apparatus main body 100 so as to be freely opened and closed has been described. However, the present invention is not particularly limited to this mode. For example, a lid that is detachably attached to the apparatus main body 100 or a lid that is slidably attached to the apparatus main body 100 may be used.

  Further, as described above, in the present embodiment, the apparatus main body 100 is provided with the three switches 41, 42, and 43 in order to switch the conduction / non-conduction between the main body electrode portion ELa and the processing circuit 150. It is not necessary to provide a switch for each electrode included in the main body electrode portion ELa. It is sufficient that at least two switches corresponding to the negative electrode 121A and the positive electrode 122A are provided.

  15 shows a state in which the terminal 212 of the connector part 210 and the terminal 312 of the connector part 310 are connected to both the external electrode socket 131 and the external terminal socket 132, respectively, for ease of explanation. In reality, only one is connected.

  FIG. 17 is a functional block diagram showing a functional configuration of the portable electrocardiograph 1 in the embodiment of the present invention.

  Referring to FIG. 17, CPU 154 includes a measurement instruction receiving unit 1541, a measurement processing unit 1542, an electrode determining unit 1543, a storage processing unit 1544, a read instruction receiving unit 1545, a reading unit 1546 and a display processing unit 1547. The operation of each block may be realized by executing software stored in the ROM 1551, and at least one of these may be realized by hardware.

  The measurement instruction receiving unit 1541 receives an input of a measurement instruction from the user based on the signal from the measurement button 142.

  When the measurement instruction receiving unit 1541 receives a measurement instruction, the measurement processing unit 1542 performs an electrocardiographic waveform measurement process according to a known procedure. Only the electrical signal detected by either the main body electrode part ELa or the external electrode part ELb is input to the measurement processing unit 1542 via the amplifier circuit 151, the filter circuit 152, and the A / D converter 153. .

  The electrode discriminating unit 1543 discriminates an electrode unit electrically connected to the amplifier circuit 151 based on a signal from the open / close sensor 170 when the measurement instruction receiving unit 1541 receives the measurement instruction. That is, based on the opening / closing information of the cover 130 </ b> A detected by the open / close sensor (switch) 170, the electrode part used for measurement (hereinafter referred to as “measurement electrode”) Is determined. In the present embodiment, an example in which the open / close sensor 170 includes a switch has been described, but the present invention is not limited to this.

  The storage processing unit 1544 performs processing for storing the electrocardiographic waveform data measured by the measurement processing unit 1542 in the flash memory 1553 in association with the electrode type data of the measurement electrode determined by the electrode determining unit 1543.

  The read instruction receiving unit 1545 receives an input of a memory read instruction (display instruction) from the user based on a signal from the memory button 143.

  The reading unit 1546 reads the electrocardiographic waveform data and electrode type data stored in the flash memory 1553 when the reading instruction receiving unit 1545 receives a memory reading instruction.

  Display processing unit 1547 performs processing for displaying electrocardiographic waveform data and electrode type data read by reading unit 1546 in association with each other on display unit 148.

  In the present embodiment, portable electrocardiograph 1 may have a function of notifying the open / closed state of cover 130A. In that case, CPU 154 performs a process for notifying the opening / closing state based on, for example, information on opening / closing of cover 130 </ b> A detected by opening / closing sensor 170. The notification of the open / close state may be performed on the display unit 148 of the apparatus main body 100 or may be performed on an output unit (not shown) provided in the apparatus main body 100. The output unit (not shown) outputs, for example, any one of sound, light, and vibration.

(About operation)
FIG. 18 is a flowchart showing an electrocardiographic waveform measurement / storage process in the embodiment of the present invention. The processing shown in the flowchart of FIG. 18 is stored in advance in the ROM 1551 as a program, and the CPU 154 reads out and executes this program, thereby realizing the function of measurement / storage processing.

  With reference to FIG. 18, first, the measurement instruction receiving unit 1541 determines whether or not a measurement instruction is input (step S2). When an input of a measurement instruction is accepted by pressing measurement button 142 (YES in step S2), electrode determination unit 1543 determines whether cover 130A is open or closed based on a signal from open / close sensor 170. (Step S4).

  When the open / close sensor 170 detects that the cover 130A is closed (when the switch 170 is in a conductive (ON) state) (“closed” in step S4), the type of the measurement electrode is the main body electrode portion ELa. (Step S6). In this case, a flag for indicating the type of the measurement electrode (hereinafter referred to as “electrode flag”) is set to 0 in a predetermined area of the RAM 1552. On the other hand, when the open / close sensor 170 detects that the cover 130A is in the open state (when the switch 170 is in the non-conductive (OFF) state) ("open" in step S4), the type of the measurement electrode is external. It is determined that the electrode portion is ELb. In this case, the electrode flag is set to 1 in a predetermined area of the RAM 1552 (step S8).

  Subsequently, the measurement processing unit 1542 starts measuring the electrocardiographic waveform of the subject (step S10). More specifically, the amplifier circuit 151 amplifies the electrical signal detected by either the main body electrode portion ELa or the external electrode portion ELb, and the filter circuit 152 removes noise from the amplified electrical signal. . Then, the A / D converter 153 converts the electric signal (analog signal) after noise removal into a digital signal. The measurement processing unit 1542 acquires the digital signal converted by the A / D converter 153, displays the digital signal on the display unit 148 in real time, and temporarily stores it in the RAM 1552.

  Such processing is continuously executed for a specified time by, for example, a timer (not shown).

  During the measurement, the measured electrocardiogram 161 is displayed on the display unit 148 for a predetermined time, and is scrolled to the right or left as the measurement progresses, and updated to the newly measured electrocardiogram as needed. . In addition, heart rate data per unit time is displayed on the same screen as the electrocardiogram waveform. In addition, the item displayed during a measurement is not restricted to this, You may make it display other information.

  When the measurement of the electrocardiogram waveform is completed, the CPU 154 may execute an analysis process on the electrocardiogram waveform data stored in the RAM 1552 and perform the analysis process of the electrocardiogram waveform data (step S12). More specifically, the CPU 154 may perform processing for discriminating the type information of the electrocardiographic waveform data by extracting characteristic time changes appearing in the electrocardiographic waveform data stored in the RAM 1552. For example, five types of information such as “tachycardia”, “bradycardia”, “irregular RR interval”, “cardiac pause”, and “ventricular premature contraction” are determined as abnormal items. The type information is not limited to these, and other items may be added. If none of the types is applicable, it is determined that the corresponding electrocardiographic waveform is normal.

  Here, the types of the five items will be briefly described. In general, “tachycardia” means that the heart rate is 100 times or more per minute, and “bradycardia” means that the heart rate is 50 times or less per minute. “RR interval irregularity” means that the R wave interval is irregular, for example, the rhythm of the R wave is lost or one beat is lost. “Cardiac pause”, also referred to as “pause”, means that the heart is temporarily inactive. “Ventricular extrasystole” is also referred to as “VPC (Ventricular Premature Contraction)” and refers to ectopic excitation generated from the ventricle of the heart. This “ventricular premature contraction” is determined based on the width of the triangle (QRS width) forming the R wave peak.

  In addition, the process of above-mentioned step S4-S8 and the process of step S10 may be processed in parallel, and may be processed in series. In the case of serial processing, the execution order does not matter. Moreover, the process of step S10 and the process of step S12 may be processed in parallel, and may be processed in series.

  When the above processing ends, the storage processing unit 1544 stores the electrocardiographic waveform data stored in the RAM 1552 in the flash memory 1553 in association with the electrode type data (0 or 1) (step S14). More specifically, this electrode type data is added to the measurement data as header information. Then, the measurement / storage processing of the electrocardiographic waveform in the portable electrocardiograph 1 ends.

  FIG. 19 is a diagram showing a data structure of measurement data in the portable electrocardiograph 1 of the present embodiment. Referring to FIG. 19, each of measurement data 80 stored in flash memory 1553 includes, for example, “ID information”, “recording date / time”, “electrode type”, “normal / abnormal information”, “electrocardiogram waveform data”. 5 fields 81-85. The contents of each field are outlined. The “ID information” field 81 stores an identification number for specifying each measurement data, and the “recording date” field 82 includes the measurement start date and measurement period of each measurement data. Stores the information. In addition, the “electrode type” field 83 stores information indicating which of the main body electrode portion ELa and the external electrode portion ELb the measurement electrode is. The “normal / abnormal information” field 84 stores the type information of the electrocardiographic waveform data determined by the analysis process.

(About display examples)
Next, a display example of measurement data will be described.

  FIG. 20 is a diagram showing an example of an electrocardiogram waveform display screen displayed on display unit 148 of portable electrocardiograph 1 according to the present embodiment.

  When reading instruction receiving unit 1545 receives an input of a memory reading instruction from a user, reading unit 1546 reads measurement data from flash memory 1553. The reading instruction may correspond to a display instruction for measurement data desired by the user, or may correspond to a display instruction for all measurement data.

  The display processing unit 1547 generates a signal for displaying the read measurement data on the display unit 148.

  Referring to FIG. 20, measurement electrode type information (external / main body) 168 is displayed along with the measurement date and time in the upper part of the screen. At the display start time, a reduced waveform 162 of the entire waveform over the entire measurement period is displayed in the lower part of the screen, and an enlarged waveform 164 of, for example, 2 seconds from the start of measurement is displayed in the upper part. A scale bar 165 indicating the length of the measurement period is displayed below the reduced waveform 162. On the scale bar 165, a pointer 166 for indicating which waveform the enlarged waveform 164 is in the measurement period is displayed. The change of which waveform of the entire measurement period is displayed as the enlarged waveform 164 is performed by operating the right scroll button 146 and the left scroll button 145 to move the pointer 166 on the scale bar 165 by a predetermined time unit. For example, it can be changed in units of 2 seconds. When the test subject confirms the electrocardiogram waveform on the screen of FIG. 20 and then presses the enter button 144, the display processing unit 1547 reads the analysis type data corresponding to the displayed electrocardiogram waveform from the flash memory 1553, and displays a message. The edited message may be displayed on the display unit 148 as shown in FIG. In FIG. 21, a message 167 indicating that “the waveform does not appear to be disturbed” and heart rate data 163 per unit time indicated as “60 beats / minute” are displayed on the display unit 148. ing.

  As described above, when the electrocardiogram waveform is displayed, information on the measurement electrode is also displayed in association with it. Therefore, the subject or the like can check which measurement electrode the waveform data is measured from. Therefore, when a message is displayed as shown in FIG. 21, it is possible to estimate the reliability of the message.

(Modification)
(About ECG waveform display system)
Next, an electrocardiographic waveform display system that functions by connecting the apparatus main body 100 of the portable electrocardiograph 1 and the external terminal 4 via the external terminal connection unit 300 will be described.

  FIG. 22 is a schematic configuration diagram of an electrocardiogram waveform display system SYS in the present embodiment. The configuration and operation of the portable electrocardiograph 1 constituting this electrocardiographic waveform display system SYS are the same as those in the above-described embodiment. Therefore, these descriptions here will not be repeated.

  When connecting the apparatus main body 100 of the portable electrocardiograph 1 to the external terminal 4, as described above, the cover 130A provided in the apparatus main body 100 is opened and the opening 132a of the external terminal socket 132 is opened. Expose. Then, one end of the external terminal connection unit 300 is connected to the external terminal 4, and the terminal 312 located on the other end side is connected to the external terminal socket 132 of the apparatus main body 100. Thereby, the apparatus main body 100 of the portable electrocardiograph 1 and the external terminal 4 are connected by the external terminal connection unit 300.

  The external terminal 4 is typically configured by a computer, and includes a computer main body 410 including an FD (Flexible Disk) driving device 414 and a CD-ROM (Compact Disk-Read Only Memory) driving device 415, a keyboard 430, and a mouse 440. And further including.

  FIG. 23 is a schematic configuration diagram showing a hardware configuration of a computer constituting the external terminal 4 in the present embodiment.

  Referring to FIG. 23, a computer main body 410 includes a CPU (Central Processing Unit) 411, which is an arithmetic device connected to each other via a bus, in addition to the FD driving device 414 and the CD-ROM driving device 415 shown in FIG. A memory 412, a fixed disk 413 as a storage device, an interface unit 416, and a power supply circuit 417.

  An FD 414a is mounted on the FD driving device 414, and a CD-ROM 415a is mounted on the CD-ROM driving device 415. External terminal 4 according to the present embodiment is realized by CPU 411 executing software using computer hardware such as memory 412. In general, such software is stored in a recording medium such as the FD 414a or the CD-ROM 415a or distributed via a network or the like. Such software is read from a recording medium by the FD driving device 414, the CD-ROM driving device 415, or the like, or received by a communication interface (not shown), and stored in the fixed disk 413. Further, it is read from the fixed disk 413 to the memory 412 and executed by the CPU 411.

  The monitor unit 420 is a display unit for displaying information such as an electrocardiogram waveform output from the CPU 411, and includes, for example, an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube). The mouse 440 receives a command from a user (typically, a diagnostic operator such as a doctor) according to an operation such as click or slide. The keyboard 430 receives a command from a user corresponding to the input key. The CPU 411 is an arithmetic processing unit that executes various arithmetic operations by sequentially executing programmed instructions. The memory 412 stores various information according to the program execution of the CPU 411.

  The interface unit 416 includes a connector (socket) 418 for detachably connecting the connector 330 located at one end of the external terminal connection unit 300 (the other end of the connector unit 310). The connector 418 receives measurement data from a flash memory 1553 provided in the apparatus main body 100 of the portable electrocardiograph 1. The interface unit 416 may further include a slot for receiving electrocardiographic waveform data from an external storage medium (not shown).

  When the connector 330 of the external terminal connection unit 300 is connected to the connector 418, the portable electrocardiograph 1 and the external terminal 4 are electrically connected. Then, the processing circuit 150 provided inside the apparatus main body 100 of the portable electrocardiograph 1 and the internal circuits (CPU 411, memory 412, etc.) of the external terminal 4 are electrically connected. In this state, a signal is transmitted between the processing circuit 150 provided in the apparatus main body 100 of the portable electrocardiograph 1 and the internal circuit provided in the external terminal 4 via the external terminal connection unit. The ECG information stored in the flash memory 1553 of the apparatus main body 100 of the portable electrocardiograph 1 can be transferred to the external terminal 4.

  In the portable electrocardiograph 1 in the present embodiment, the electrical connection between the first contact 134 and the second contact 135 is released by operating the cover 130A. Further, when the external terminal connection unit 300 is connected to the external terminal socket 132 of the apparatus main body 100, the opening 131a of the external electrode socket 131 for connecting to the connector part 310 of the external terminal connection unit 300 to the external electrode connection unit 200. Is blocked. Therefore, in a state where the apparatus main body 100 and the external terminal 4 are connected, both the main body electrode portion ELa and the external electrode portion ELb are always electrically insulated from the processing circuit 150 provided inside the apparatus main body 100. It becomes a state.

  Therefore, even when the power supply voltage of the power supply circuit 417 of the external terminal 4 is mixed into the processing circuit 150 of the portable electrocardiograph 1 via the internal circuit of the external terminal 4 and the external terminal connection unit 300 as a surge. The main electrode part ELa and the external electrode part are not reached. For this reason, even if the subject is in contact with the main body electrode portion ELa when the surge is mixed, there is no possibility that the subject will receive an electric shock.

  The fixed disk 413 is a nonvolatile storage device that stores programs executed by the CPU 411 and measurement data received from the flash memory 1553 of the portable electrocardiograph 1. The external terminal 4 may be connected to another output device such as a printer as necessary.

  The CPU 411 performs control for displaying the measurement data stored in the fixed disk 413 on the monitor 420. As shown in FIG. 19, the measurement data includes electrode type data in association with each electrocardiographic waveform data. Accordingly, information on the type of measurement electrode is also displayed on the monitor 420 of the external terminal 4 in association with the electrocardiographic waveform data.

  FIG. 24 is a diagram showing a display example of the electrocardiogram waveform display screen 90 displayed on the monitor 420 of the external terminal 4 in the electrocardiogram waveform display system SYS of the present embodiment.

  Referring to FIG. 24, for example, the CPU 411 causes the monitor 420 to display an electrocardiogram waveform display screen 90 including four electrocardiogram waveforms 91 to 94 in the order of measurement date and time (recording date and time). These electrocardiographic waveforms 91 to 94 are drawn by plotting data stored in the “electrocardiographic waveform data” field 85 (FIG. 19) of the corresponding measurement data 80. The time axes of the electrocardiogram waveforms 91 to 94 are preferably the same scale.

  Further, the CPU 411 displays information on the types of electrodes used for the measurement of the electrocardiographic waveforms 91 to 94 in the regions 91a to 94a in correspondence with the electrocardiographic waveforms 91 to 94, respectively. Information displayed in the areas 91 a to 94 a is displayed based on data stored in the “electrode type” field 83 of the corresponding measurement data 80. In addition, it is not limited to such a display mode, What is necessary is just to display each electrocardiogram 91-94 and the electrode type in association. For example, the display modes of the electrocardiogram waveforms 91 to 94 may be displayed in black if the electrode type is the main body electrode portion ELa, and may be displayed in red if the electrode type is the external electrode portion ELb.

  Thus, also on the monitor 420 of the external terminal 4, the electrocardiogram waveform and the type of electrode used for the measurement of the electrocardiogram waveform are displayed in association with each other. Therefore, the specialist can easily know which electrode unit the measurement data is measured. Further, when evaluating the measurement data, the specialist can use only the electrocardiographic waveform data measured by the highly reliable external electrode unit ELb. Further, when the above-described analysis process (step S12 in FIG. 18) is not executed in the portable electrocardiograph 1, only the electrocardiographic waveform data measured by the external electrode unit ELb is analyzed on the external terminal 4. You can also

  Furthermore, in the portable electrocardiograph 1 of the present embodiment, the measurement is performed between the other electrode unit and the amplifier circuit 151 regardless of whether the measurement is performed using either the main body electrode unit ELa or the external electrode unit ELb. Therefore, there is no fear that noise from the electrode group not in use is mixed into the electrocardiogram waveform, and a more reliable measurement result can be presented.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a 1st schematic perspective view of the portable electrocardiograph in embodiment of this invention. It is a 2nd schematic perspective view of the portable electrocardiograph in embodiment of this invention. It is a front view of the portable electrocardiograph in the embodiment of the present invention. It is a top view at the time of making the cover body of the portable electrocardiograph in embodiment of this invention into a closed state. It is a bottom view of the portable electrocardiograph in the embodiment of the present invention. It is a right view of the portable electrocardiograph in the embodiment of the present invention. It is a left view of the portable electrocardiograph in embodiment of this invention. It is a figure which shows the external electrode connection unit connectable with the apparatus main body of the portable electrocardiograph in embodiment of this invention. It is a figure which shows the state which open | released the cover provided in the apparatus main body of the portable electrocardiograph in embodiment of this invention. It is a figure which shows a mode that an external electrode connection unit and an external terminal connection unit are connected to the apparatus main body of a portable electrocardiograph. It is a perspective view which shows the 1st measurement attitude | position by the main-body electrode part provided in the apparatus main body of the portable electrocardiograph in embodiment of this invention. It is the figure which looked at the 1st measurement posture from the upper part. It is a figure which shows the holding state by the test subject of the apparatus main body of a portable electrocardiograph in a 1st measurement attitude | position. It is a figure which shows the example of arrangement | positioning of an external electrode part in the 2nd measurement attitude | position by the external electrode part of the portable electrocardiograph in embodiment of this invention, (A) is arrangement | positioning of the external electrode part based on CM5 guidance | induction It is a figure which shows an example, (B) is a figure which shows the example of arrangement | positioning of the external electrode part based on CC5 induction | guidance | derivation. It is a block diagram which shows the hardware constitutions of the portable electrocardiograph in embodiment of this invention. (A) is a partial cross-sectional view of the apparatus main body showing a state where the cover is closed, and (B) is a partial cross-sectional view of the apparatus main body showing a state where the cover is opened. It is a functional block diagram which shows the function structure of the portable electrocardiograph in embodiment of this invention. It is a flowchart which shows the measurement / storage process of the electrocardiogram waveform in embodiment of this invention. It is a figure which shows the data structure of the measurement data in the portable electrocardiograph of embodiment of this invention. It is a figure which shows an example of the electrocardiogram waveform display screen displayed on the display part of the portable electrocardiograph in embodiment of this invention. It is a figure which shows an example of the message display screen displayed on the display part of the portable electrocardiograph in embodiment of this invention. 1 is a schematic configuration diagram of an electrocardiogram waveform display system in an embodiment of the present invention. It is a schematic block diagram which shows the hardware constitutions of the computer which comprises the external terminal in embodiment of this invention. It is a figure which shows the example of a display of the electrocardiogram waveform display screen displayed on the monitor of the external terminal in the electrocardiogram waveform display system of embodiment of this invention.

Explanation of symbols

  1 portable electrocardiograph, 4 external terminal, 40 frame, 41, 42, 43 switch, 41a, 42a, 43a, 162a switch terminal, 50 spring, 52 side, 52a rotating shaft, 60 slider, 61, 62, 63 , 64 Projection, 80 Measurement data, 90 ECG waveform display screen, 100 Device main body, 101 Front, 102 Back, 103 Top, 104 Bottom, 105a Recess, 105 Right side, 106 Left side, 121A, 121B Negative electrode, 122A , 122B Positive electrode, 123A, 123B Indifferent electrode, 130A, 130B, 130C Cover, 131 External electrode socket, 131a, 132a Opening, 132 External terminal socket, 134, 135 contacts, 140 Operation unit, 141 Power button, 142 Measurement Button, 143 memory button, 144 Fixed button, 145 left scroll button, 146 right scroll button, 148 display unit, 150 processing circuit, 151 amplifier circuit, 152 filter circuit, 153 A / D converter, 154, 411 CPU, 155 memory, 160 power supply, 180 alignment mark, 200 external electrode connection unit, 210 connector part, 212 terminal, 213 shielding part, 220 cable, 231, 232, 233 clip, 300 external terminal connection unit, 310 connector part, 312 terminal, 313 shielding part, 320 cable, 330 connector, 410 computer main body, 412 memory, 413 fixed disk, 414 FD drive device, 415 CD-ROM drive device, 416 interface unit, 417 power supply circuit, 418 connector, 420 Monitor, 430 Keyboard, 440 Mouse, 500 Subject, 510 Right hand, 511 Thumb, 512 Finger, 520 Forearm, 530 Upper arm, 540 Right shoulder, 550 Chest, 1541 Measurement instruction reception unit, 1542 Measurement processing unit, 1543 Electrode discrimination unit, 1544 Storage processing unit, 1545 Reading instruction receiving unit, 1546 Reading unit, 1547 Display processing unit, 1551 ROM, 1552 RAM, 1553 flash memory, ELa body electrode unit, ELb external electrode unit, PD electrode pad, SYS ECG waveform display system.

Claims (9)

A housing including a processing circuit for processing an electrical signal detected from a living body;
An external electrode unit, a first connector unit for connecting to the housing, and an external electrode unit including a first cable for electrically connecting the external electrode unit and the connector unit;
The housing is
An openable / closable lid provided on the surface of the housing;
A first terminal that is covered by the lid when the lid is in a closed state and that can be connected to the first connector portion when the lid is in an open state;
A main body electrode provided on the surface of the housing;
When the lid is in a closed state, the processing circuit and the main body electrode portion are in a conductive state, and when the lid is in an open state, the processing circuit and the main body electrode portion are switched to a non-conductive state. A portable electrocardiograph comprising switching means for The housing is
Detection means for detecting opening and closing of the lid;
An electrode discriminating means for discriminating which of the main body electrode portion and the external electrode portion is connected to the processing circuit based on the output from the detecting means;
The portable electrocardiograph according to claim 1, further comprising storage means for storing the electrocardiographic waveform data processed by the processing circuit in association with the determination result by the electrode determination means. The housing is
Reading means for reading the electrocardiographic waveform data and the determination result stored in the storage means;
Display control means for generating a signal for displaying the electrocardiographic waveform data read by the reading means in association with the discrimination result;
The portable electrocardiograph according to claim 2, further comprising display means for performing display according to an output from the display control means. A second connector portion for connecting to the housing, a third connector portion for connecting to an external terminal, and an electrical connection between the second connector portion and the third connector portion; An external terminal unit including the second cable of
The housing further includes a second terminal that is covered by the lid when the lid is in a closed state and that can be connected to the second connector portion when the lid is in an open state. The portable electrocardiograph according to claim 1.   The said 1st connector part has a 1st shielding part which makes the said 2nd terminal and the said 2nd connector part non-connectable in the state connected with the said 1st terminal. Portable electrocardiograph.   The said 2nd connector part has a 2nd shielding part which makes the said 1st terminal and the said 1st connector part impossible to connect in the state connected with the said 2nd terminal. Portable electrocardiograph. The body electrode part has a plurality of electrodes,
The portable electrocardiograph according to claim 1, wherein the switching unit includes a plurality of switches corresponding to the plurality of electrodes.   The portable electrocardiograph according to claim 1, wherein the casing further includes notification means for notifying an open / closed state of the lid. A housing including a processing circuit for processing an electrical signal detected from a living body;
An openable / closable lid provided on the surface of the housing;
A terminal that can be connected to a connector portion that is covered by the lid when the lid is in a closed state and that is electrically connected to an external electrode when the lid is in an open state;
A main body electrode provided on the surface of the housing;
When the lid is in a closed state, the processing circuit and the main body electrode portion are in a conductive state, and when the lid is in an open state, the processing circuit and the main body electrode portion are switched to a non-conductive state. A portable electrocardiograph comprising switching means for

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