WO2021187224A1

WO2021187224A1 - Portable electrocardiographic device

Info

Publication number: WO2021187224A1
Application number: PCT/JP2021/009216
Authority: WO
Inventors: 心哉小高
Original assignee: オムロンヘルスケア株式会社
Priority date: 2020-03-19
Filing date: 2021-03-09
Publication date: 2021-09-23
Also published as: JP2021145917A

Abstract

This portable electrocardiographic device includes: a circuit board having an electronic component mounted thereon; a housing containing the circuit board and a battery; and first and second electrodes for detecting an electrocardiographic signal, the first and second electrodes being provided respectively on a pair of surfaces of the housing that are opposed to each other in the longitudinal direction and being electrically connected to the circuit board. The portable electrocardiographic device is characterized in that: the battery is contained in the housing such that the longitudinal direction thereof is along the longitudinal direction of the housing; and the first and second electrodes are provided at a distance such that a subject can bring the carpal region of the right hand into contact with the chest region when the subject brings the right hand index finger into contact with the first electrode and contacts the second electrode with the chest region.

Description

Portable electrocardiograph

The present invention relates to a portable electrocardiographic device capable of measuring an electrocardiographic waveform in daily life or the like.

Conventionally, a portable electrocardiographic measuring device (hereinafter, also referred to as "portable electrocardiographic device") that can immediately measure an electrocardiographic waveform when an abnormality such as chest pain or palpitation occurs in daily life has been proposed. .. Doctors, etc., perform early detection of heart disease and appropriate treatment based on the electrocardiographic waveform data measured by the electrocardiographic device when symptoms such as palpitation occur at home or on the go. Will be possible.

As such a portable electrocardiographic device, as disclosed in Patent Document 1, a device having a flat and slender substantially rectangular parallelepiped outer shape is known. In this electrocardiographic device, a positive electrode is arranged on one end face in the longitudinal direction of the main body of the device, and a negative electrode and a ground electrode are arranged on the other end face. In addition, the battery that serves as the power source for the portable electrocardiographic device is housed along the lateral direction of the device body. At the time of measurement, while grasping one end face side of the electrocardiographic device with the right hand and bringing the fingers of the right hand into contact with the negative electrode and the ground electrode, the other end face is pressed against a predetermined place on the chest and the positive electrode is pressed against the skin at the place. To contact. If the longitudinal dimension of the device body is significantly longer than the width of the hand holding the device body, the force pressing against the chest rotates the device body around an axis along the other end face. Therefore, the contact state of the electrodes tends to be unstable. In addition, the larger the size of the device body, the worse the portability.

Japanese Unexamined Patent Publication No. 2010-166961

In view of the above-mentioned conventional techniques, it is an object of the present invention to provide a portable electrocardiographic device having high stability and portability in contact state of electrodes.

In order to solve the above problems, the portable electrocardiographic device according to the present invention is
A circuit board on which electronic components are mounted and
A housing that houses the circuit board and batteries,
A portable device having a first electrode and a second electrode for detecting an electrocardiographic signal, which are provided on a pair of surfaces facing each other along the longitudinal direction of the housing and are electrically connected to the circuit board. It is a type electrocardiographic device
The battery is housed in the housing so that the longitudinal direction is along the longitudinal direction of the housing.
The first electrode and the second electrode allow the wrist of the right hand to come into contact with the chest when the subject touches the second electrode with the chest while the subject touches the first electrode with the index finger of the right hand. The feature is that it is provided at a certain distance.

In this way, when the subject touches the second electrode to the chest with the first electrode in contact with the index finger of the right hand to detect the electrocardiographic signal, the pair facing each other along the longitudinal direction of the housing. The first electrode and the second electrode are provided at a distance at which the wrist portion of the right hand in which the index finger is in contact with the first electrode provided on one of the surfaces can be brought into contact with the chest. Therefore, the distance between the first electrode and the second electrode can be shortened, and the size of the portable electrocardiographic device 1 can be reduced in the longitudinal direction, so that the portability is improved. Further, when the index finger of the right hand is brought into contact with the first electrode and the second electrode is brought into contact with the chest to detect an electrocardiographic signal, the second electrode brought into contact with the chest is used as a fulcrum, and the degree of freedom of movement is relatively high. Since the rotational moment of the force acting on the first electrode from the index finger of the right hand can be reduced, the posture of the portable electrocardiographic device can be stabilized and the contact state of the electrodes can be stabilized.

Further, in the present invention
The first electrode and the second electrode may be arranged in the housing so as to sandwich the cylindrical battery from both ends in the longitudinal direction.

In this way, since the first electrode and the second electrode are arranged in the housing so as to be sandwiched from both ends in the longitudinal direction of the cylindrical battery, it is compact in the direction orthogonal to the longitudinal direction of the housing. Since a portable electrocardiographic device can be configured, portability can be enhanced.

Further, in the present invention
The housing may have a battery opening for accommodating or removing the battery from the housing, and an opening / closing member for opening / closing the battery opening.

In this way, the battery can be accommodated in or taken out of the housing by opening the opening for the battery by the opening / closing member, so that convenience is impaired even if the portable electrocardiographic device is miniaturized. Never.

Further, in the present invention
It is built in the housing and includes a battery accommodating portion for accommodating the battery.
In the battery accommodating portion, the positive electrode terminal of the opening for the battery is used to hook a finger or a claw from the outside in the longitudinal direction of the battery on the positive electrode side end surface on which the protruding portion of the positive electrode terminal of the battery is formed. The battery accommodating portion may be arranged in the housing so that a gap into which the finger or the claw can be inserted is provided between the inner edge on the side and the end surface on the positive electrode side.

In this way, the inner edge of the battery opening on the positive electrode terminal side and the positive electrode can be hooked on the end face on the positive electrode side of the battery with respect to the battery opening in order to hook a finger or a claw from the outside in the longitudinal direction of the battery. The battery accommodating portion is arranged in the housing so that a gap into which a finger or a claw can be inserted is provided between the side end surface and the battery housing portion. Therefore, the portability of the portable electrocardiographic device can be improved by shortening the distance between the first electrode and the second electrode without impairing the ease of taking out the battery.

Further, in the present invention
The battery accommodating portion corresponds to the battery in which the positive electrode terminals are accommodated so that the positive electrode terminals are opposite to each other in the longitudinal direction of the housing, and the gaps are provided on both sides with respect to the longitudinal direction of the housing. It may be arranged in the housing so as to be provided.

In this way, even when a plurality of batteries are used as a power source, the distance between the first electrode and the second electrode of the portable electrocardiographic device can be shortened without impairing the ease of taking out the batteries. can.

Further, in the present invention
The batteries housed so that the positive electrode terminals are oriented in opposite directions to the longitudinal direction of the housing may be shifted to the respective negative electrode sides and housed in the battery housing unit.

By doing so, the distance between the first electrode and the second electrode of the portable electrocardiographic device can be shortened without impairing the ease of taking out the battery, and the portability of the portable electrocardiographic device can be improved. Can be done.

According to the present invention, it is possible to provide a portable electrocardiographic device having high stability and portability in contact state of electrodes.

FIG. 1 is a perspective view showing the appearance of the portable electrocardiographic device according to the embodiment. FIG. 2 is a diagram showing a usage mode of the portable electrocardiographic device according to the embodiment. FIG. 3 is a block diagram showing an example of the system configuration of the portable electrocardiographic device according to the embodiment. FIG. 4 is an external view showing a battery storage structure of the portable electrocardiographic device according to the comparative example. FIG. 5 is a cross-sectional view taken along the line AA of the portable electrocardiographic device according to the comparative example. FIG. 6 is an external view showing a battery storage structure of the portable electrocardiographic device according to the embodiment. FIG. 7 is a cross-sectional view taken along the line BB of the portable electrocardiographic device according to the embodiment. FIG. 8A is a cross-sectional view taken along the line CC of the portable electrocardiographic device according to the embodiment, and FIG. 8B is a cross-sectional view taken along the line DD of the portable electrocardiographic device according to the embodiment. FIG. 9 is a diagram illustrating the assembly of the battery cover to the main housing in the portable electrocardiographic device according to the embodiment.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
An example of the embodiment of the present invention will be described below. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention to those.

(Configuration of portable electrocardiographic device)
1 (A) to 1 (C) are views showing an example of the configuration of the portable electrocardiographic device 1 according to the present embodiment. FIG. 1A is a perspective view of the portable electrocardiographic device 1 as viewed from the upper left of the front surface. FIG. 1B is a perspective view of the portable electrocardiographic device 1 as viewed from the upper left side of the back surface. FIG. 1C is a perspective view of the portable electrocardiographic device 1 as viewed from the lower left of the front surface. The vertical direction described below means the vertical direction on paper with respect to the portable electrocardiographic device 1 in the postures shown in FIGS. 1A to 1C.

As shown in FIGS. 1 (A) to 1 (C), the main body of the portable electrocardiographic device 1 has a substantially quadrangular prism shape with rounded corners, and the front and back surfaces are formed flat. The upper part of the portable electrocardiographic device 1 is provided with a finger electrode 4 on the right side and a ground electrode (hereinafter referred to as “GND electrode”) 3 on the left side when viewed from the front surface. A chest electrode 2 is provided at the bottom of the portable electrocardiographic device 1. The upper part of the portable electrocardiographic device 1 has a shape that is smoothly curved so that the index finger of the subject's right hand can easily come into contact with it. Specifically, the upper part of the main body has an upwardly convex shape in which the central portion sandwiched between the finger electrode 4 and the GND electrode 3 becomes higher in the left-right direction when viewed from the front, which is the longitudinal direction thereof. .. Further, the upper part of the main body has an upwardly concave shape in which the central portion is lowered in the front-rear direction when viewed from the front, which is the lateral direction thereof. A measurement notification LED 12 and an abnormal wave detection LED 13 are arranged side by side on the front surface of the main body of the portable electrocardiographic device 1. The measurement notification LED 12 is a light emitting element that lights up or blinks when measuring an electrocardiographic waveform (electrocardiographic signal). The abnormal waveform detection LED 13 is a light emitting element that lights up when an abnormal waveform is detected with respect to the measured electrocardiographic waveform. Through the lighting of the abnormal waveform detection LED 13, the subject is notified of the presence or absence of the abnormal waveform detected from the measurement data of the electrocardiographic waveform. A power LED 6, a power switch 7, a communication LED 8, a communication switch 9, a memory remaining display LED 10, and a battery replacement LED 11 are arranged side by side on the left side of the main body of the portable electrocardiographic device 1 when viewed from the front. .. The power switch 7 is a pressing switch for turning on the power of the portable electrocardiographic device 1, and the power LED 6 is a light emitting element that lights up when the power is turned on. The communication switch 9 is an operating component for functioning communication with a device conforming to a predetermined communication method, and the communication LED 8 is a light emitting element that lights up during communication. The communication function included in the portable electrocardiographic device 1 may be a wireless communication method such as BLE, infrared communication, information transmission by ultrasonic waves, or a wired communication method connected via a cable or a connector, and is limited. Not done. The memory remaining display LED 10 is a light emitting element that indicates the state of the free capacity of the memory unit, which will be described later. The battery replacement LED 11 is a light emitting element that lights up when the power of the power source (battery) included in the portable electrocardiographic device 1 falls below a predetermined value to encourage battery replacement. A chest electrode 2 is provided on the bottom of the main body of the portable electrocardiographic device 1. Further, on the back surface of the main body of the portable electrocardiographic device 1, a rectangular removable battery cover 5 having rounded corners, which occupies most of the back surface, is provided. The finger electrode 4 and the GND electrode 3 correspond to the first electrode of the present invention. Further, the chest electrode 2 corresponds to the second electrode of the present invention. The battery cover 5 corresponds to the opening / closing member of the present invention.

Here, when the I-lead measurement is performed in the electrocardiographic measurement, the chest electrode 2 provided at the bottom of the main body is brought into contact with the left palm while grasping the portable electrocardiographic device 1 with the right hand. The index finger of the right hand that grips the portable electrocardiographic device 1 is brought into close contact with the GND electrode 3 on the distal end side and on the finger electrode 4 on the proximal end side along the concave processing applied to the upper side of the main body. In this state, the chest electrode 2 is pressed in the direction of pressing from the upper side of the main body toward the left palm. Here, the "tip side" in close contact with the GND electrode 3 includes a portion corresponding to the terminal segment of the index finger of the right hand. Further, the "base end side" in close contact with the finger electrode 4 includes, for example, a portion corresponding to the intermediate phalanx of the index finger of the right hand.

Further, when the chest induction measurement is performed in the electrocardiographic measurement, as shown in FIG. 2, the subject touches the chest electrode 2 to, for example, the chest 17 while grasping the portable electrocardiographic device 1 with the right hand 16. Let me. As in the case of the I-lead measurement, the index finger 161 of the right hand that grips the portable electrocardiographic device 1 has the tip end side on the GND electrode 3 and the base end side along the concave processing applied to the upper side of the main body. Is brought into close contact with the finger electrode 4, and the chest electrode 2 is pressed in the direction of pressing from the upper side of the main body toward the chest 17.

Further, as described above, when the chest electrode 2 is pressed against the chest 17 while the index finger 161 is in close contact with the finger electrode 4 and the GND electrode 3 on the upper part of the main body, as shown in FIG. 2, the portable electrocardiographic device 1 The thumb 162 of the right hand 16 that grips the body is attached to the front surface, and the middle finger, ring finger, and little finger are attached to the back surface. At this time, the carpal portion 163 of the right hand 16 can be brought into contact with the chest portion 17. That is, the distance between the finger electrode 4 and the GND electrode 3 arranged on the upper surface and the lower surface facing each other along the longitudinal direction of the portable electrocardiographic device 1 and the chest electrode 2 is such that the index finger of the right hand is the finger electrode 4 and the finger electrode 4 and the chest electrode 2. When the GND electrode 3 is brought into contact with the chest electrode 2 and the chest electrode 2 is brought into contact with the chest 17, the carpal portion 163 of the right hand 16 is set to a distance that allows contact with the chest 17. By doing so, the length between the finger electrode 4 and the GND electrode 3 and the chest electrode 2 can be shortened, and the portable electrocardiographic device 1 can be miniaturized, so that the portability is improved. Further, when the chest guidance measurement is performed by the portable electrocardiographic device 1, the chest electrode 2 is brought into contact with the chest 17 by bringing the carpal portion 163 of the right hand 16 holding the portable electrocardiographic device 1 into contact with the chest 17. As a fulcrum, the rotational moment of the force acting on the finger electrode 4 and the GND electrode 4 from the index finger of the right hand, which has a relatively high degree of freedom of movement, can be reduced. It can be stabilized and accurate measurement can be performed.

(System configuration of portable electrocardiograph)
Next, the system configuration of the portable electrocardiographic device will be described. FIG. 2 is a diagram showing an example of the system configuration of the portable electrocardiographic device 1 according to the present embodiment. As shown in FIG. 2, the portable electrocardiographic device 1 includes an electrode unit 101, an amplifier unit 102, an AD (Analog to Digital) conversion unit 103, a control unit 104, and a timer unit 105. .. Further, the configuration of the portable electrocardiographic device 1 includes a memory unit 106, a display unit 107, a notification unit 108, an operation unit 109, a power supply unit 110, and a communication unit 111. The control unit 104, the timer unit 105, the memory unit 106, the display unit 107, the notification unit 108, the operation unit 109, the power supply unit 110, and the communication unit 111 are connected to each other.

The electrode portion 101 includes a chest electrode 2 and a finger electrode 4 that function as a pair of measurement electrodes, and a GND electrode 3. An electrocardiographic waveform within a predetermined period is detected through the electrode portion 101 in contact with the skin of the subject. The electrocardiographic waveform detected at each electrode of the electrode unit 101 is input to the amplifier unit 102 connected to the electrode unit, respectively. In the amplifier unit 102, the signal detected by the electrode unit 101 is amplified and output to the AD conversion unit 103. In the AD conversion unit 103, the detection signal of the electrocardiographic waveform amplified through the amplifier unit 102 is digitally converted and output to the control unit 104.

The control unit 104 is a means for controlling the portable electrocardiographic device 1, and includes, for example, a CPU (Central Processing Unit) and the like. When the control unit 104 receives an instruction from the subject to start measuring the electrocardiographic waveform via the operation unit 109, the control unit 104 records the measurement data regarding the electrocardiographic waveform within a predetermined period detected by the electrode unit 101 in the memory unit 106. Then, the control unit 104 analyzes the electrocardiographic waveform detected within a predetermined period, and saves the analysis result in the memory unit 106. The control unit 104 turns on the abnormal waveform detection LED 13 when an abnormal waveform is detected as a result of the electrocardiographic waveform analysis. In addition, each component of the portable electrocardiographic device 1 is controlled so as to execute a process according to the operation of the subject through the operation unit 109.

The data related to the electrocardiographic waveform recorded in the memory unit 106 within a predetermined period and the analysis result of the electrocardiographic waveform are provided to an information processing device such as a smartphone or a PC that cooperates with each other through BLE communication or the like. .. In a medical institution or the like, it becomes possible to perform early detection of a heart disease and appropriate treatment action based on the measurement data, analysis result, etc. of the electrocardiographic waveform provided by the portable electrocardiographic device 1.

The timer unit 105 is a means for receiving an instruction from the control unit 104 and counting various periods related to the measurement of the electrocardiographic waveform. The memory unit 106 includes a main storage device such as a ROM (Read Only Memory) and a RAM (Random Access Memory), as well as a long-term storage medium such as a flash memory. The memory unit 106 stores various programs related to measurement and analysis of electrocardiographic waveforms, various information for detecting abnormal waveforms, and the like. The display unit 107 is a means for displaying various information related to the measurement of the electrocardiographic waveform. The display unit 107 includes a power supply LED 6, a communication LED 9, a memory remaining display LED 10, a battery replacement LED 11, a measurement notification LED 12, and an abnormal waveform detection LED 13. The display unit 107 may include means for displaying various types of information by means of an image / video such as a liquid crystal display. The notification unit 108 is a means for notifying the subject of various information such as the end of measurement by vibrating the portable electrocardiographic device 1. The notification unit 108 may include a speaker or the like for notifying the subject of a voice message.

The operation unit 109 is a means for receiving operation input from the subject. The operation unit 109 includes a power switch 7 and a communication switch 9. The power supply unit 110 is a means for supplying electric power for operating the portable electrocardiographic device 1, and includes a battery, a secondary battery, and the like. The communication unit 111 is a communication interface that controls transmission and reception of signals with a device such as a smartphone. BLE communication can be exemplified as the communication function provided by the communication unit 111, but other known wireless communication methods and wired communication methods can be adopted.

(Outline of ECG waveform measurement process)
The outline of the measurement process of the electrocardiographic waveform using the portable electrocardiographic device 1 will be described below. Here, a case where the portable electrocardiographic device 1 measures an electrocardiographic waveform by itself will be described as an example. The electrocardiographic waveform measurement process described below is realized by the control unit 104 of the portable electrocardiographic device 1 executing the program stored in the memory unit 106.

First, when the subject presses the power switch 7 of the portable electrocardiographic device 1, the power LED 6 lights up. When the contact state of the subject with respect to the chest electrode 2, the finger electrode 4, and the GND electrode 3 is detected and it is determined that the electrode contact state is good, the measurement of the electrocardiographic waveform is started. When the measurement of the electrocardiographic waveform is started, the measurement notification LED 12 lights up or blinks. When the measurement of the electrocardiographic waveform is started, the electrocardiographic waveform data is recorded in the memory unit 106 together with the time information. When the measurement is continuously performed for a predetermined time, the electrocardiographic waveform of the subject is analyzed based on the measured electrocardiographic waveform data. At this time, the electrocardiographic waveform is analyzed based on the time-series data recorded in the memory unit 106. The analysis result is stored in the memory unit 106. When an abnormal waveform is detected as a result of the electrocardiographic waveform analysis, the abnormal waveform detection LED 13 lights up or blinks. After that, when the subject presses the power switch 7 again, the power supplied from the power supply unit 110 is cut off, and the power supply LED 6 is turned off.
When the portable electrocardiographic device 1 is used in cooperation with a smartphone or the like, it communicates with the smartphone or the like via the communication unit 11, and at that time, information on the communication state is transmitted by lighting or blinking the communication LED 9. indicate.

(Battery storage structure)
Next, the battery accommodating structure in the portable electrocardiographic device 1 will be described. 4 and 5 are views showing a portable electrocardiographic device 1000 as a comparative example of the present invention. Except for the configuration related to the storage of the battery, the portable electrocardiographic device 1000 has the same overall configuration as the portable electrocardiographic device 1, with the same reference numerals and the description thereof will be omitted. FIG. 4 is a rear view of the portable electrocardiographic device 1000 with the battery cover removed. FIG. 5 is a diagram showing an internal structure of the portable electrocardiographic device 1000 in the AA cross section shown in FIG.
As shown in FIG. 4, in the portable electrocardiographic device 1000, two

AAA batteries

14 and 15 are housed so that the directions of the electrodes alternate in the vertical direction. That is, the battery 14 is housed so that the positive electrode 14a faces upward and the negative electrode side end surface 14b faces downward, and the battery 15 is housed so that the negative electrode 15b faces upward and the positive electrode 112a faces downward. As shown in FIG. 4, the AA cross section is a cross section that passes through the central axis of the substantially cylindrical battery 14.

The

batteries

14 and 15 are housed in the battery holder 1002 housed inside the main housing 1001 constituting the housing of the portable electrocardiographic device 1000. The battery holder 1002 is connected to the side wall 10021 having a shape in which partial cylindrical surfaces that follow the outer shape of the

batteries

14 and 15 are arranged in parallel, and both ends in the longitudinal direction of the side wall 10021, and both ends in the longitudinal direction of the

batteries

14 and 15 to be accommodated. Includes

end walls

10022 and 10023 facing the surface. A positive electrode side contact 10024 is provided on the inner surface 10022a of the end wall 10022. Further, the inner surface 10023a of the end wall 10023 is interposed between the negative electrode side end surface 14b on which the negative electrode terminal of the battery 14 is formed, presses the battery 14 toward the end wall 10022 side, and also serves as a contact point on the negative electrode side. A spring 10025 is provided. Further, the end wall 10023 of the battery holder is formed integrally with the chest electrode support portion 1023b that supports the chest electrode 2.

Further, a spiral spring is interposed on the inner surface 10022a of the end wall 10022 with the negative electrode side end surface 15b on which the negative electrode terminal of the battery 15 is formed, presses the battery 15 toward the end wall 10023 side, and also serves as a contact point on the negative electrode side. 10026 is provided. A contact point on the positive electrode side is provided on the inner surface 10023a of the end wall 10023. A lead wire 10025a connected to the power supply unit 110 on the substrate 1003 is pulled out from the spiral spring 10025 provided on the inner surface 10023a of the end wall 10023, and the same applies to the contact point facing the protruding portion 15a of the positive electrode terminal of the battery 15. The lead wire is pulled out to. Further, the contact 10024 on the positive electrode side provided on the inner surface 10022a of the end wall 10022 and the spiral spring 10026 are electrically connected. In this way, the protruding portion 14a of the positive electrode terminal of the battery 14 is connected to the negative electrode side end surface 15b of the battery 15, and the battery 14 and the battery 15 are connected in series.

In the portable electrocardiographic device 1000, the positive electrode side end surface 14c on which the protruding portion 14a of the positive electrode terminal of the battery 14 is formed, the inner surface 10022a of the end wall 10022 of the opposite battery holder 1002, and the end of the opening 10011 of the main housing 1001. A space Sp10 is provided between the edge 10011a and the edge 10011a. This space Sp10 is for the subject to insert the battery 14 to hook a finger or a nail on the positive electrode side end surface 14c of the battery 14 when the battery 14 is removed from the battery holder 1002. Here, since the edge 10011a of the opening 10011 of the main housing 1001 and the inner surface 10022a of the end wall 10022 of the battery holder 1002 are located on substantially the same surface, they and the positive electrode side end surface 14c of the battery 14 C10 defines the size of the space Sp10, but when they are not on substantially the same plane, the distance between the battery 14 and the positive electrode side end surface 14c of the battery 14 is C10 when viewed in the longitudinal direction of the battery 14. The interval C10 defines the size of the space Sp10. A spiral spring 10025 is provided on the negative electrode side end surface 14b side of the battery 14, and the urging force of the spiral spring 10025 presses the protruding portion 14a of the positive electrode terminal of the battery 14 against the contact 10024. Therefore, on the negative electrode side end surface 14b side of the battery 14, the distance between the edge 10011b of the opening 10011 of the main housing 1001 and the inner surface 10023a of the end wall 10023 of the battery holder 1002 is relatively large. The same applies to the battery 15.

In the portable electrocardiographic device 1000 having the above-described configuration, parts other than the

batteries

14 and 15 are integrated at a higher density in order to suppress the height of the entire portable electrocardiographic device 1000 in the longitudinal direction of the

batteries

14 and 15. If the

batteries

14 and 15 are arranged in the same manner, the space Sp10 between the

batteries

14 and 15 and the edge 10011a of the opening 10011 of the main housing 1001 becomes narrow, and it becomes difficult to take out the

batteries

14 and 15.

The battery accommodating structure of the portable electrocardiographic device 1 according to the present embodiment will be described with reference to FIGS. 6 and 7. FIG. 6 is a rear view of the portable electrocardiographic device 1 in which the battery cover 5 is removed and the opening 202 is opened. FIG. 7 is a diagram showing an internal structure of the portable electrocardiographic device 1 in the BB cross section. Here, the opening 202 corresponds to the opening for the battery in the present invention.
In the portable electrocardiographic device 1, two

AAA batteries

14 and 15 are housed so that the directions of the electrodes alternate in the vertical direction. That is, in the battery 14, the protruding portion 14a of the positive electrode terminal faces upward, the negative electrode side end surface 14b on which the negative electrode terminal is formed faces downward, and in the battery 15, the negative electrode side end surface 15b faces upward and the protruding portion 15a of the positive electrode terminal faces downward. Is housed so as to face the direction opposite to the longitudinal direction of the main housing 201. As shown in FIG. 6, the BB cross section is a cross section that passes through the central axis of the substantially cylindrical battery 14. Here, the

AA batteries

14 and 15 correspond to the cylindrical batteries in the present invention.

The

batteries

14 and 15 constitute the housing of the portable electrocardiographic device 1, and are housed in the battery holder 500 housed (built-in) inside the main housing 201 exposed to the outside. The battery holder 500 is connected to a side wall 501 having a shape in which partial cylindrical surfaces that follow the outer shapes of the

batteries

14 and 15 are arranged in parallel, and both ends in the longitudinal direction of the side wall 501, and both ends in the longitudinal direction of the

batteries

14 and 15 to be accommodated. Includes

end walls

502 and 503 facing the surface. The inner side surface 502a of the end wall 502 is provided with a spiral spring 505 that presses the battery 14 toward the end wall 503 and also serves as a contact point on the positive electrode side. Further, on the inner side surface 503a of the end wall 503, a spiral spring 506 that is interposed between the end surface of the battery 14 on the negative electrode side end surface 14b side and presses the battery 14 toward the end wall 502 side and also serves as a contact point on the negative electrode side is provided. It is provided. Further, the end wall 503 of the battery holder is formed integrally with the chest electrode holder 504 that supports the chest electrode 2. As shown in FIG. 7, a circuit board 60 on which electronic components such as a control unit 104 and a power supply unit 110 are mounted is housed between the battery holder 500 and the main housing 201. A pair of surfaces of the chest electrode 2 electrically connected to the circuit board 60, the finger electrode 4 and the GND electrode 3 facing each other along the longitudinal direction of the main housing 201 (the vertical direction of the portable electrocardiographic device 1). It is provided in each. The

batteries

14 and 15 are housed in the main housing 201 via the battery holder 500 so as to follow the longitudinal direction of the main housing 201. Here, the battery holder 500 corresponds to the battery accommodating portion of the present invention.

Further, the inner side surface 502a of the end wall 502 is provided with a spiral spring 507 that is interposed between the end surface 502a on the negative electrode side of the battery 15 and presses the battery 15 toward the end wall 503 and also serves as a contact point on the negative electrode side. There is. The inner side surface 503a of the end wall 503 is provided with a spiral spring 508 that also serves as a contact point on the positive electrode side even when the battery 15 is pressed toward the end wall 502 side. Lead wires 506a and 508a connected to the power supply unit 110 on the circuit board 60 are drawn out from the spiral spring 506 and the spiral spring 508 provided on the inner side surface 503a of the end wall 503, respectively. Further, the spiral spring 505 and the spiral spring 507 provided on the inner side surface 502a of the end wall 502 are formed of an integral member electrically connected. In this way, the protruding portion 14a of the positive electrode terminal of the battery 14 is connected to the negative electrode side end surface 15b of the battery 15, and the battery 14 and the battery 15 are connected in series.

On the back surface of the main housing 201 of the portable electrocardiographic device 1, an opening 202 that communicates with the inside is opened by removing the battery cover 5. The opening 202 is a substantially rectangular shape long in the longitudinal direction of the

batteries

14 and 15, and has rounded four corners. The opening 202 is a frame 2021 that bends inward from the surface of the main housing 201, an extension 2022 that bends from the inner end of the frame 2021 toward the center of the opening 202, and an extension 2022. 2023, which has a flange portion 2023 that bends outward from the end portion on the central portion side of the opening 202. The battery cover 5 has a flange portion 52 orthogonal to the surface 51 around the substantially plate-shaped surface 51. The frame portion 2021 of the opening faces the end surface 52 of the battery cover 5 when the battery cover 5 is attached to the opening 2021. When the battery cover 5 is removed, the flange portion 2023 is located on the central portion side of the opening 202. Therefore, the positional relationship between the flange portion 2023 and the

batteries

14 and 15 affects the ease of taking out the

batteries

14 and 15.

In the portable electrocardiographic device 1, the inner side surface 503a of the end wall 503 of the battery holder 500 is retracted toward the chest electrode 2 side in the longitudinal direction of the battery 14 with respect to the inner side surface 2023b of the flange portion 2023 of the opening 202. It is provided at the position. On the other hand, on the end wall 502 side of the battery holder 500, the inner side surface 502a retracts toward the GND electrode 3 and the finger electrode 4 side in the longitudinal direction of the battery 14 with respect to the inner side surface 2023a of the flange portion 2023 of the opening 202. The inner side surface 502a on which the spiral spring 505 is arranged is provided at a position protruding toward the chest electrode 2 side in the longitudinal direction of the battery 14 with respect to the inner side surface 2023a of the flange portion 2023 of the opening 202. There is. That is, the battery 14 is located relatively closer to the negative electrode side end surface 14b side in the longitudinal direction (the chest electrode 2 side which is lower when viewed as a whole of the portable electrocardiographic device 1) with respect to the opening 202. Be placed. As a result, the distance C1 between the inner side surface 2023a of the flange portion 2023 of the opening 202 and the positive electrode side end surface 14c on which the protruding portion 14a of the positive electrode terminal of the battery 14 is formed can be set large, and the flange of the opening 202 can be set. A gap formed between the inner side surface 2023a of the portion 2023 and the positive electrode side end surface 14c of the battery 14 into which a finger or a nail can be inserted, that is, the finger or the nail is inserted from the outside in the longitudinal direction of the battery 14 on the positive electrode side end surface 14c. The space Sp1 for hooking on the battery 14 and taking out the battery 14 can be widely set. On the other hand, the space Sp2 formed between the inner side surface 2023b of the flange portion 2023 of the opening 202 and the negative electrode side end surface 14b of the battery 14 becomes narrower. Here, the inner side surface 2023a of the flange portion 2023 of the opening 202 corresponds to the inner edge of the battery opening in the present invention on the positive electrode terminal side.

The battery 15 is closer to the negative electrode side end surface 15b side in the longitudinal direction (the GND electrode 3 and the finger electrode 4 side which are upward when viewed as a whole of the portable electrocardiographic device 1) with respect to the opening 202. Placed in position. As a result, a gap formed between the inner side surface 2023b of the flange portion 2023 of the opening 202 and the end surface 15c on the protruding portion 15a side of the positive electrode terminal of the battery 15 into which a finger or a nail can be inserted, that is, the battery 15. A wide space Sp3 for hooking a finger or a nail on the positive electrode side end surface 14c from the outside in the longitudinal direction and taking out the battery 15 can be set widely. On the other hand, the space Sp4 formed between the inner side surface 2023a of the flange portion 2023 of the opening 202 and the negative electrode 15b of the battery 15 becomes narrower. Since the battery 14 and the battery 15 are arranged in opposite directions with respect to the longitudinal direction, the directions in which the battery 14 and the battery 15 approach each other with respect to the entire portable electrocardiographic device 1 are opposite to each other. Further, the spaces Sp1 and Sp3, which are gaps into which fingers or claws can be inserted, are provided on both sides of the main housing 201 in the longitudinal direction.

FIG. 8A is a cross-sectional view taken along the line CC shown in FIG. 8B of the portable electrocardiographic device 1. FIG. 8B is a cross-sectional view of the portable electrocardiographic device 1 in the DD cross section shown in FIG. 8A.
As described above, the subject inserts a finger or a nail by shifting the

batteries

14 and 15 toward the negative electrode side end faces 14b and 15b, respectively, with respect to the opening 202 for attaching and detaching the

batteries

14 and 15. Spaces Sp1 and Sp3 for hooking on the positive electrode side end faces 14c side and 15c are wide. In this way, by configuring the portable electrocardiographic device 1 so that the

batteries

14 and 15 are arranged with respect to the opening 202, the ratio of the height of the entire device to the height in the longitudinal direction of the battery can be set. It can be made smaller. Specifically, the total height of the portable electrocardiographic device 1 with respect to the height of the battery 14 (distance from the longitudinal tip of the protruding portion 14a of the positive electrode terminal to the end surface 14b on the negative electrode side) H1 (viewed from the front). The ratio of (distance) H2 from the top 201p located at the uppermost position of the main housing 201, which is sometimes convexly formed upward, to the chest electrode 2 can be set to 1: 1.41 (71%). In this way, the height of the entire portable electrocardiographic device 1 could be reduced without impairing the ease of removal of the

batteries

14 and 15.

FIG. 9 is a diagram showing a procedure for assembling the battery cover 5 that opens and closes the opening 202 to the main housing 201.
The battery cover 5 includes a surface 51 that constitutes the exterior of the portable electrocardiographic device 1 together with the main housing 201, and a flange portion 52 that is bent from an end portion of the surface 51. The opening 202 is closed by the battery cover 5 by engaging the disengageable engaging portion of the battery cover 5 with the corresponding engaging portion of the main housing 201. At this time, the flange portion 52 of the battery cover 5 is fitted to the outer periphery of the flange portion 2023 of the opening 202 of the main housing 201.

The present invention is not limited to the above embodiment, and can be variously modified and implemented without departing from the gist of the present invention.

1 ... Portable electrocardiogram 2 ... Chest electrode 3 ... GND electrode 4 ... Finger electrode

Claims

A circuit board on which electronic components are mounted and
A housing that houses the circuit board and batteries,
A portable device having a first electrode and a second electrode for detecting an electrocardiographic signal, which are provided on a pair of surfaces facing each other along the longitudinal direction of the housing and are electrically connected to the circuit board. It is a type electrocardiographic device
The battery is housed in the housing so that the longitudinal direction is along the longitudinal direction of the housing.
The first electrode and the second electrode allow the wrist of the right hand to come into contact with the chest when the subject touches the second electrode with the chest while the subject touches the first electrode with the index finger of the right hand. A portable electrocardiographic device characterized by being installed at a certain distance.
The portable electrocardiographic device according to claim 1, wherein the first electrode and the second electrode are arranged in the housing so as to sandwich the cylindrical battery from both ends in the longitudinal direction thereof. ..
Claim 1 is characterized in that the housing has a battery opening for accommodating the battery in the housing or taking it out of the housing, and an opening / closing member for opening / closing the battery opening. Or the portable electrocardiographic device according to 2.
It is built in the housing and includes a battery accommodating portion for accommodating the battery.
In the battery accommodating portion, the positive electrode terminal of the opening for the battery is used to hook a finger or a nail from the outside in the longitudinal direction of the battery on the positive electrode side end surface on which the protruding portion of the positive electrode terminal of the battery is formed. The third aspect of claim 3, wherein the battery accommodating portion is arranged in the housing so that a gap into which the finger or a claw can be inserted is provided between the inner edge on the side and the end surface on the positive electrode side. Portable electrocardiograph.
The battery accommodating portion corresponds to the battery in which the positive electrode terminals are accommodated so as to be opposite to each other with respect to the longitudinal direction of the housing, and the gaps are provided on both sides with respect to the longitudinal direction of the housing. The portable electrocardiographic device according to claim 4, wherein the portable electrocardiographic device is arranged in the housing so as to be provided.
5. The battery according to claim 5, wherein the batteries housed so that the positive electrode terminals are oriented in opposite directions to the longitudinal direction of the housing are housed in the battery housing portion by shifting them toward the respective negative electrodes. The portable electrocardiographic device described.