JP2011069738A - Scale - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scale suitable for carrying. <P>SOLUTION: The scale 100 includes a first measuring part 110 which is shaped like a flat plate and has a plurality of conductive rubbers arranged, a second measuring part 120 which is a separate body from the first measuring part 110 and which has external shape dimensions about equal to those of the first measuring part 110 and has the conductive rubbers in a plurality arranged, and connecting members 134 and 135 which connect the first measuring part 110 and the second measuring part 120 so that they may form the same plane. The scale includes a means for holding calibration information as to each conductive rubber, a means for acquiring weight data on condition that connection is made by the connecting members 134 and 135, a means for compensating the obtained individual weight data, using the calibration information, and a means for calculating the weight data on an examinee by adding the compensated individual weight data. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a scale.

  In recent years, with an increase in health orientation, an increasing number of people actively manage their daily weight. For this reason, in the field of weight scales, weight scales equipped with various functions for managing and analyzing measured weight data have been proposed (for example, see Patent Documents 1 and 2 below).

  On the other hand, in order to strictly manage the weight, it is important to measure the weight using the same scale at the same time without missing every day. However, when it is absent for a long time on a business trip or a trip, it is rare to carry out weight management by bringing a weight scale to a business trip destination or a travel destination, and the weight measurement tends to be interrupted. In such a case, if there is a portable weight scale, it is expected that weight measurement can be continuously performed regardless of whether or not a business trip or a trip is present.

  On the other hand, in the medical field, there are patients whose daily weight management is indispensable. Specifically, patients whose dialysis does not function normally (dialysis patients) and the like can be mentioned.

  In the case of a dialysis patient, waste products cannot be discharged out of the body by urine, and the waste products gradually accumulate in the body. For this reason, it is necessary to remove waste from the body by regularly performing hemodialysis (HD) or peritoneal dialysis (PD) (in the case of peritoneal dialysis, dialysis is performed at least twice a day). Need to do).

  For such dialysis patients (especially peritoneal dialysis patients), an ideal weight is set for each dialysis patient by a doctor. This is because, in the case of a dialysis patient, the amount of water present in the body gradually increases as the waste is not discharged by urine, and the weight increases with the passage of time.

  And, if the overweight obtained by subtracting the ideal weight from the actual weight that is the actual weight becomes more than a certain value, symptoms such as a decrease in blood pressure will occur, so for dialysis patients, Before such symptoms appear, artificial dialysis is performed in advance to remove the water and waste products accumulated in the body.

  That is, the timing for performing artificial dialysis on a dialysis patient is determined based on the result of weight measurement. For this reason, in the case of a dialysis patient, it is necessary to regularly measure the body weight and always check whether the overweight is equal to or greater than a certain value.

  However, weight management for dialysis patients can usually be performed using a scale at home or in a hospital, etc., but when conducting social activities outside the home or hospital, the weight that can be used immediately Since the total is not familiar, it may happen that weight management cannot be performed. On the other hand, even in such a case, it is expected that a dialysis patient can participate in social activities without inconvenience if there is a portable weight scale.

JP 2009-8613 A Japanese Utility Model Publication No. 63-99234

  However, there has been a fixed idea that weight scales have a certain size and weight. Conventionally, in the field of weight scales, convenience (weight reduction, size reduction, etc.) has been pursued on the premise of carrying. There were few things.

  The present invention has been made in view of the above problems, and an object thereof is to provide a weight scale suitable for carrying.

In order to achieve the above object, the weight scale according to the present invention has the following configuration. That is,
A first measuring unit having a flat plate shape and a plurality of conductive rubbers for detecting an external force acting in a direction substantially perpendicular to the plane;
Separate from the first measurement unit, which has a plurality of conductive rubbers having an external dimension substantially equal to the first measurement unit and detecting an external force acting in a direction substantially orthogonal to the plane. A second measuring unit;
A connecting member that connects the side surface of the first measurement unit and the side surface of the second measurement unit so that the same plane is formed by the first measurement unit and the second measurement unit; A weight scale comprising:
A measured value of an external force detected when a calibration jig having a predetermined weight is placed on each conductive rubber disposed in the first and second measurement units, and the predetermined weight. Holding means for holding calibration information in which the relationship with the theoretical value of the external force to be detected when the calibration jig is placed is defined;
When the subject is placed across the first measurement unit and the second measurement unit, the external force detected in each of the conductive rubbers arranged in the first and second measurement units is detected. Obtaining means for obtaining on the condition that the side surface of the first measurement unit and the side surface of the second measurement unit are connected by the connection member;
Correction means for calculating weight data for each conductive rubber by correcting each external force acquired by the acquisition means using calibration information held by the holding means;
Weight data calculation means for calculating weight data of the subject by adding weight data for each conductive rubber calculated by the correction means.

  According to the present invention, it is possible to provide a weight scale suitable for carrying.

It is a figure which shows the external appearance structure of the weight scale 100 which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the measurement surface of the weight scale. It is a figure which shows the mode transition of the scale 100. FIG. It is a figure which shows the function structure of the weight scale. It is a figure which shows the function structure of the control part. It is a figure which shows an example of the calibration data used in the weight data correction | amendment part 504. FIG. It is a flowchart which shows the flow of the weight measurement process in the weight scale 100. FIG. 6 is a diagram showing a display example on the display unit 123. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings as necessary.

[First Embodiment]
<1. Appearance structure of weight scale>
FIG. 1 is a diagram showing an external configuration of a weight scale 100 according to the first embodiment of the present invention. As shown in FIG. 1 (A), the weight scale 100 includes first and second measuring units 110 and 120 having substantially the same external dimensions and each having a vertically long flat plate shape.

  The first measurement unit 110 and the second measurement unit 120 are connected to each other on one long side so as to be rotatable. Specifically, the side surface 111 of the first measurement unit 110 and the side surface 121 of the second measurement unit 120 having substantially the same outer dimensions as the first measurement unit 110 are connected via the hinge mechanisms 131 to 133. Accordingly, the second measuring unit 120 can be opened and closed (foldable) in the direction of the arrow 130 with respect to the first measuring unit 110.

  The second measuring unit 120 is configured to open up to a maximum of 180 degrees with respect to the first measuring unit 110. In the state where the second measuring unit 120 is opened to the maximum angle, the first measuring unit 110 and the second measuring unit 120 are The same plane is formed (see FIG. 1B).

  Of the hinge mechanisms 131 to 133, the hinge mechanism 131 is assumed to be inserted with wiring for electrically connecting the first measurement unit 110 and the second measurement unit 120. Thereby, transmission / reception of signals between the first measurement unit 110 and the second measurement unit 120 is possible.

  Further, the side surface 111 of the first measurement unit 110 and the side surface 121 of the second measurement unit 120 are configured to be opposed to each other in a state of being opened up to the maximum angle (180 degrees). Further, rectangular connection portions (connection members) 134 and 135 are arranged.

  Each of the connecting portions 134 and 135 is configured by a member such as a magnet, and is configured such that the opposing surfaces are attracted to each other when the connecting portions 134 and 135 are opened to the maximum angle. Thereby, the 2nd measurement part 120 can maintain stably the state opened to the maximum angle with respect to the 1st measurement part 110. FIG.

  Further, the connecting portions 134 and 135 are configured to be electrically connected to each other in a state where the second measuring unit 120 is opened to the maximum angle with respect to the first measuring unit 110, and are opened to the maximum angle. It also functions as a contact point that detects when it is in a broken state.

  FIG. 1B shows a state in which the second measuring unit 120 is opened to the maximum angle with respect to the first measuring unit 110.

  In FIG. 1B, a measurement surface 112 of the first measurement unit 110 is a surface on which the right foot is placed when the subject measures the weight. On the other hand, the measurement surface 122 of the second measurement unit 120 is a surface on which the left foot is placed when the subject measures the weight. For this reason, the measurement surfaces 112 and 122 have such a size that each foot of the subject can be placed. In the present embodiment, for example, l = 300 mm and w = 100 mm.

  The measurement surfaces 112 and 122 are provided with conductive rubbers 141 to 148 inside (details will be described later with reference to FIG. 2), and an external force applied downward is detected by placing a foot on each surface ( In the present embodiment, it is assumed that each of the measurement surfaces 112 and 122 corresponds to a load of 20 to 50 kg). Thus, the thickness h of the measurement surfaces 112 and 122 can be reduced by adopting a configuration in which the conductive rubbers 141 to 148 are arranged as sensors for detecting weight (weight according to the present embodiment). In the case of a total of 100, h = about 5 to 30 mm).

  In addition, various buttons for inputting various instructions to the weight scale 100 are arranged on the operation unit 113. In the operation unit 113, a measurement mode button 114 is a button for measuring body weight. When the measurement mode button 114 is pressed, the scale 100 shifts to the measurement mode.

  The display mode button 115 is a button for displaying data such as history of weight data in the past weight measurement and data of the center of gravity at the time of weight measurement. The weight scale 100 is displayed when the display mode button 115 is pressed. Enter mode.

  The data transmission mode button 116 is a button for transmitting data that can be displayed in the display mode to an external device (such as a personal computer or a mobile phone (not shown)). When the data transmission mode button 116 is pressed, the weight scale 100 shifts to the data transmission mode.

  The zero point adjustment button 117 is a button for adjusting the zero point of the scale 100, and the weight adjustment is performed when the zero point adjustment button 117 is pressed while nothing is placed on the measurement surfaces 112 and 122. The total 100 is automatically adjusted so that the weight indication value becomes zero.

  The arrow keys and the determination key 118 are keys for moving the cursor displayed on the display unit 123 up and down, left and right, and selecting the display content displayed at the cursor position.

  The display unit 123 displays the measured weight data in the measurement mode, and displays the history of the weight data in the past weight measurement, the position of the center of gravity at the time of the weight measurement, and the like in the display mode.

  The power switch 151 is used to turn on / off the power of the scale 100. The connector 152 is connected to a cable for transmitting various data to an external device (such as a personal computer or a mobile phone not shown).

<2. Structure of measuring surface of weight scale and detection principle of sensor>
Next, the configuration of the measurement surfaces 112 and 122 of the scale 100 and the principle of detection of external force in the conductive rubbers 141 to 148 arranged as sensors for detecting the weight in the measurement surfaces 112 and 122 will be described.

  FIG. 2 is a diagram for explaining the configuration of the measurement surface 122 of the weight scale 100 and the principle of detection of external force in the conductive rubber 148.

  As shown in FIG. 2, conductive rubbers 145 to 148 are provided on the measurement surface 122 between a rectangular flat plate 201 made of a predetermined material (for example, an acrylic plate having a thickness of 3 mm) and the rectangular flat plate 202. It is arranged near each vertex of 122. Each conductive rubber 145 to 148 is formed of a rectangular flat plate having a side of about 10 mm.

  Here, the conductive rubber is constituted by dispersing conductive particles in an insulating elastic polymer (rubber), and in a state where there is no external force, the conductive particles are not in contact with each other. Does not flow, but when an external force is applied, particles are brought into contact with each other, so that a current flows.

  Since the current value changes in proportion to the magnitude of the external force, the magnitude of the external force can be obtained by measuring the change in the resistance value when the applied force is constant and the external force is applied.

  In addition, as a measuring method for measuring the change of the resistance value, two electrodes are arranged on the same plane of the conductive rubber, and one electrode is arranged on each of the front and back surfaces of the conductive rubber. Although there is a method, the weight scale 100 according to the present embodiment employs a method in which one electrode is disposed on each of the front and back surfaces of the conductive rubber.

  The partial enlarged display 210 schematically shows a configuration for measuring a change in resistance value when an external force is applied to the conductive rubber 148. One electrode 211, 212 is arranged on each of the front and back surfaces of the conductive rubber 148. The power source 213 is configured to supply a constant voltage. With this configuration, it is possible to determine the magnitude of the external force that acts in a direction substantially orthogonal to the conductive rubber 148.

  Although only the conductive rubber 148 has been described here, the other conductive rubbers 141 to 147 have the same configuration. Although the measurement surface 122 has been described with reference to FIG. 2, the measurement surface 112 has the same configuration.

  With the above configuration, the amount of change in the resistance value of each of the conductive rubbers 141 to 144 disposed on the measurement surface 112 and the resistance value of each of the conductive rubbers 145 to 148 disposed on the measurement surface 122 are determined. By adding the amount of change, the total of external forces acting on the measurement surfaces 112 and 122 (namely, subject weight data) is calculated.

  In addition, since the weight data of the subject is calculated by the sum of the external forces acting on the measurement surfaces 112 and 122, if only the weight data is to be calculated, the measurement surface 112 and the measurement surface 122 respectively have predetermined values. It is only necessary to calibrate each addition device when the weight calibration jig is placed.

  However, the weight scale 100 according to the present embodiment is configured to calculate the position of the center of gravity at the time of weight measurement on each of the measurement surfaces 112 and 122 (that is, for each leg). Here, in order to accurately calculate the position of the center of gravity for each leg, it is desirable that each conductive rubber arranged on each of the measurement surfaces 112 and 122 is calibrated.

  Actually, the conductive rubber disposed on each of the measurement surfaces 112 and 122 often includes manufacturing errors and is not necessarily homogeneous. FIG. 2B shows an example of output values of the conductive rubbers 145 to 148 when a calibration jig having a predetermined weight is placed on each of the conductive rubbers 145 to 148 disposed on the measurement surface 122. FIG.

  As shown in FIG. 2B, the output values of the conductive rubbers 145 to 148 with respect to the output value (ideal output value) to be output when the calibration jig having a predetermined weight is placed. There is a predetermined error, and there is some variation between the conductive rubbers 145 to 148.

  For this reason, in the weight scale 100 according to the present embodiment, the difference between the ideal output value and the actual output value of each of the conductive rubbers 145 to 148 is measured in advance for each calibration jig having a different weight. The correction value based on the difference is held as calibration information, and each time the body weight is measured, the calibration information is used to correct the output value of each of the conductive rubbers 145 to 148. Details of the output value correction method will be described later.

<3. Mode transition on scales>
Next, the mode transition in the weight scale 100 will be described with reference to FIG. As described above, the weight scale 100 according to the present embodiment has “measurement mode”, “display mode”, and “data transmission mode”, and immediately after the power switch 151 is pressed, the measurement mode is set. Configured to start.

  As shown in FIG. 3, when the display mode button 115 is pressed during the measurement mode, the display mode is entered. On the other hand, when the measurement mode button 114 is pressed in the state of transition to the display mode, the measurement mode is restored.

  Further, when the data transmission mode button 116 is pressed during the measurement mode, the mode shifts to the data transmission mode. Even when the data transmission mode button 116 is not pressed, a cable for transmitting to an external device (such as a personal computer or a mobile phone) is inserted into the connector 152, and between the scale 100 and the external device. When the communication connection is established, the mode automatically shifts to the data transmission mode. In addition, when the measurement mode button 114 is pressed in the state of shifting to the data transmission mode, the measurement mode is restored.

  Furthermore, when the data transmission mode button 116 is pressed during the display mode, the mode shifts to the data transmission mode. Even when the data transmission mode button 116 is not pressed, a cable for transmitting to an external device (such as a personal computer or a mobile phone) is inserted into the connector 152, and between the scale 100 and the external device. When the communication connection is established, the mode automatically shifts to the data transmission mode. In addition, when the display mode button 115 is pressed in the state of shifting to the data transmission mode, the display mode is restored.

<4. Functional configuration of scales>
Next, the functional configuration of the weight scale 100 will be described. FIG. 4 is a diagram showing a functional configuration of the weight scale 100. In addition, about the structure already demonstrated using FIG. 1, suppose that the same reference number is attached | subjected and description is abbreviate | omitted here.

  In FIG. 4, the amplifying unit 401 amplifies the current values output from the conductive rubbers 141 to 144, performs A / D conversion, and inputs them to the control unit 405 as weight data. Similarly, the amplifying unit 402 amplifies the current values output from the conductive rubbers 145 to 148, performs A / D conversion, and inputs the current values to the control unit 405 as weight data.

  The power supply unit 404 is controlled to be turned on / off by the power switch 151, and when turned on by the operation of the power switch 151, supplies power to each unit via the control unit 405.

  The control unit 405 controls each unit constituting the weight scale 100. Details of various functions realized by the control unit 405 will be described later.

  The memory unit 406 stores the weight data of the subject calculated by the control unit 405 and the like. The interface unit 407 includes a connector 152. The interface unit 407 transmits weight data stored in the memory unit 406 to an external device connected via the connector 152, and receives a predetermined instruction from the external device.

<5. Functions of control unit in measurement mode>
Next, various functions realized by the control unit 405 in the measurement mode will be described with reference to FIG. In FIG. 5, the overall supervision unit 501 controls the operation of each unit (502 to 512) executed when weight measurement is performed in the measurement mode.

  The connection status confirmation unit 502 confirms whether or not the connection units 134 and 135 are connected based on an instruction from the overall administration unit 501 and transmits the confirmation result to the overall administration unit 501.

  The weight data input unit 503 acquires each weight data output from the amplification units 401 and 402 based on an instruction from the overall control unit 501.

  The weight data correction unit 504 corrects each weight data (the weight data of each of the conductive rubbers 141 to 148) acquired by the weight data input unit 503 based on the calibration information held in the overall control unit. To do.

  Here, correction of weight data based on the calibration information will be described with reference to FIG. FIG. 6 is a diagram showing a relationship between each weight data output when a calibration weight having a known weight as a reference is individually placed on each of the conductive rubbers 141 to 148 and a theoretical value. . As shown in FIG. 6, the actual output from each of the conductive rubbers 141 to 148 has an error with respect to the theoretical output (theoretical value) due to the influence of the manufacturing error of the conductive rubber. For this reason, in order to accurately calculate the position of the center of gravity, it is necessary to correct the weight data based on the calibration information for each conductive rubber.

  Therefore, the weight scale 100 according to the present embodiment corrects each weight data acquired in the weight data input unit 503 based on the difference (change rate) between the actual measurement value and the theoretical value. (The scale 100 assumes that the change rate for each weight at this time is held in the overall administration unit 501 as calibration information).

  Returning to FIG. The weight calculation unit 505 adds weight data (weight data of each of the conductive rubbers 141 to 148) corrected based on the calibration information in the weight data correction unit 504, thereby adding the weight data of the subject. Is calculated. Further, by adding the weight data of each of the conductive rubbers 141 to 144, weight data (right foot side weight data) applied to the subject's right foot at the time of weight measurement is calculated. Further, by adding the weight data of each of the conductive rubbers 145 to 148, weight data (left foot side weight data) applied to the subject's left foot during weight measurement is calculated.

  The center-of-gravity A calculation unit 506 is based on the weight data of the conductive rubbers 141 to 144 arranged on the measurement surface 112 and the position coordinates indicating the positions of the conductive rubbers 141 to 144 in the measurement surface 112. The center-of-gravity position data of the right foot placed on the measurement surface 112 is calculated.

  The center-of-gravity B calculation unit 507 is based on the weight data of the conductive rubbers 145 to 148 disposed on the measurement surface 122 and the position coordinates indicating the positions of the conductive rubbers 145 to 148 in the measurement surface 122. The gravity center position data of the left foot placed on the measurement surface 122 is calculated.

  The center-of-gravity AB calculation unit 508 is configured to measure the weight at the time of weight measurement based on the weight data of the conductive rubbers 141 to 148 disposed on the measurement surfaces 112 and 122 and the relative positional relationship of the conductive rubbers 141 to 148. The center of gravity position data of the person is calculated.

  The measurement data control unit 509 includes the body weight data of the subject, the right foot side weight data of the subject, the left foot side weight data of the subject, The center of gravity position data of the examiner's right foot, the center of gravity of the subject's left foot, and the center of gravity of the subject are written in the memory unit 406, the subject's weight data, and the subject's right foot side weight. The data and the left foot side weight data of the subject are displayed on the display unit 123, respectively.

<6. Flow of weight measurement process on the scale>
Next, the flow of the weight measurement process in the weight scale 100 that is controlled in the overall administration unit 501 will be described. FIG. 7 is a flowchart showing a flow of weight measurement processing in the weight scale 100.

  When the power switch 151 is turned on or the measurement mode button 114 is pressed, the weight measurement process shown in FIG. 7 is started.

  In step S701, the overall administration unit 501 inquires of the connection state confirmation unit 502 whether or not the connection units 134 and 135 are connected. If the connection status confirmation unit 502 sends a confirmation result indicating that the connection units 134 and 135 have been connected, the process proceeds to step S702.

  On the other hand, if a confirmation result indicating that the connection cannot be confirmed is sent, the process proceeds to step S709. In step S <b> 709, an error message indicating that the second measurement unit 120 is not opened to the maximum angle with respect to the first measurement unit 110 is displayed on the display unit 123.

  In step S <b> 702, the overall management unit 501 instructs the weight data input unit 503 to acquire weight data. As a result, the weight data input unit 503 starts acquiring weight data of the conductive rubbers 141 to 148.

  If acquisition of weight data is started by the weight data input unit 503, the process proceeds to step S <b> 703, and the overall management unit 501 notifies the weight data correction unit 504 of the calibration information of the acquired weight data. Instructs correction by. Accordingly, the weight data correction unit 504 corrects the acquired weight data using the calibration information. It should be noted that the correction content has already been described with reference to FIG.

  When the weight data correction is started by the weight data correction unit 504, the process proceeds to step S706, where the overall control unit 501 sends the weight of the subject to the weight calculation unit 505 to the center of gravity AB calculation unit 508. Data, subject right foot side weight data, subject left foot side weight data, subject right foot centroid position data, subject left foot centroid location data, subject centroid location data Instruct.

  When the calculation of the respective data is completed in the weight calculation unit 505 to the center-of-gravity AB calculation unit 508, the process proceeds to step S <b> 707, and the overall administration unit 501 sends the measurement data control unit 509 as the calculation result as the subject. The body weight data, the subject's right foot side weight data, and the subject's left foot side weight data are displayed. As a result, the measurement data control unit 509 displays these data on the display unit 123.

  In step S708, it is monitored whether the weight data corrected by the weight data correction unit 504 is within a predetermined fluctuation range for a predetermined time, and the calculation result is stable. It is determined whether or not.

  If it is determined in step S708 that the calculation result is stable, the process proceeds to step S709, and the overall control unit 501 calculates the weight of the subject calculated in the time zone determined to be stable. Data, subject right foot side weight data, subject left foot side weight data, subject right foot centroid position data, subject left foot centroid location data, subject centroid location data, memory The measurement data control unit 509 is instructed to store in the unit 406.

  The measurement data control unit 509 calculates the subject's weight data, the subject's right foot side weight data, the subject's left foot side weight data, the subject's weight calculated in the time period determined to be stable The gravity center position data of the right foot of the person, the gravity center position data of the subject's left foot, and the gravity center position data of the subject are stored in the memory unit 406 in association with the measurement date and time.

<7. Display on display>
Next, display contents displayed on the display unit 123 will be described. FIG. 8 is a diagram illustrating an example of display contents displayed on the display unit 123.

  FIG. 8A is an example of display content displayed as a calculation result in the measurement mode. As shown in FIG. 8A, in the upper right area 801 of the display unit 123, the right foot side weight data (“30.0 kg”) of the subject is displayed. In addition, in the upper left area 802 of the display unit 123, the left foot side weight data (“28.5 kg”) of the subject is displayed. Further, the weight data (“58.5 kg”) of the subject is displayed in the central area 803 of the display unit 123.

  At the lower end of the display unit 123, the power mark 804 is a mark representing the power capacity of the power unit 404 of the scale 100. A connection mark 805 is a mark indicating that the connection parts 134 and 135 are connected. A date / time mark 806 represents the current date / time.

  FIG. 8B shows the subject's right foot centroid position data, the subject's left foot centroid position data, and the subject's centroid position data stored in the memory unit 406 in the display mode. It shows how it is displayed on the screen.

  In FIG. 8B, outer edges 811 and 812 indicate outer edges of the measurement surfaces 112 and 122, respectively. The center-of-gravity position 813 indicates the center-of-gravity position of the subject's right foot, the center-of-gravity position 814 indicates the center-of-gravity position of the subject's left foot, and the center-of-gravity position 815 indicates the center-of-gravity position of the subject.

  FIG. 8C shows a state in which the weight data of the subject stored in the memory unit 406 together with the measurement date / time is displayed on the display unit 123 in the display mode. In FIG. 8C, the horizontal axis represents the date and the vertical axis represents the weight data of the subject. Thus, the subject can easily know the transition of the weight data in the past weight measurement by displaying it in association with the date.

  The display contents to be displayed on the display unit 123 in the display mode are selected from a menu list (not shown) displayed on the display unit 123 using the arrow keys and the decision key 118 to select a desired display menu. Shall be determined by

As is clear from the above description, in the weight scale 100 according to the present embodiment,
-It was set as the structure which uses conductive rubber as a sensor of a measurement part.
-It was set as the structure which connects two separate measurement parts so that opening and closing is possible (foldable).

  As a result, the weight and thickness can be reduced, and the size can be reduced, and the convenience of carrying can be improved. As a result, it has become possible to provide an optimal weight scale for those who want to continuously measure weight, such as those who actively carry out daily weight management and dialysis patients.

Moreover, in the weight scale 100 according to the present embodiment,
・ Considering that the reproducibility of measurement data is reduced due to the opening and closing angles between the first measurement unit and the second measurement unit, a connection unit is provided so that the open state up to the maximum angle can be maintained stably. .
-It was set as the structure which starts acquisition of weight data on the condition that the connection part is connected at least.

  As a result, a reduction in measurement error can be realized.

Furthermore, in the weight scale 100 according to the present embodiment,
-It was set as the structure which processes the weight data each acquired in the two measurement parts independently.

  As a result, the weight data of each of the two measuring units can be displayed. Also, the center of gravity position on the right foot side and the center of gravity position on the left foot side can be displayed.

Moreover, in the weight scale 100 according to the present embodiment,
-Calibration information for each conductive rubber is held, and weight data is corrected for each conductive rubber.

  This makes it possible to improve the accuracy of the center of gravity position.

[Second Embodiment]
In the first embodiment, the interface unit 407 is connected to an external device by wire, but the present invention is not limited to this and may be configured to be performed wirelessly.

  In the first embodiment, the measurement data is written in the memory unit 406. However, the present invention is not limited to this. For example, the measurement data may be written in the RFID tag. In this case, the interface unit 407 is not necessary, and measurement data can be transmitted to the outside simply by bringing the scale 100 close to an external RFID reader.

  In the first embodiment, the display unit 123 and the operation unit 113 are arranged. However, the present invention is not limited to this. For example, the external device is provided with the functions of the display unit and the operation unit, the overall control unit 501 operates based on an instruction from the external device, and the measurement data control unit 509 transmits the measurement data in real time via the interface unit 407. It is also possible to use a configuration for transmitting to the external device. In this case, the connection with the external device is not limited to a wired connection, and may be wireless.

  In the first embodiment, four conductive rubbers are arranged in the vicinity of each vertex position. However, the number of the conductive rubbers is not limited to this, and the conductive rubbers are not limited thereto. This arrangement is not limited to this.

  In the first embodiment, the first measurement unit 110 and the second measurement unit 120 are connected by a hinge mechanism. However, the present invention is not limited to this. The first measurement unit 110 and the second measurement unit 120 may be configured to be separably connected.

DESCRIPTION OF SYMBOLS 100 ... Scale, 110 ... 1st measurement part, 113 ... Operation part, 114 ... Measurement mode button, 115 ... Display mode button, 116 ... Data transmission button, 117 ..Zero point adjustment button, 118..., Arrow key and enter key, 120... 141, 148 ... conductive rubber, 151 ... power switch, 152 ... connector, 211-212 ... electrode, 401-403 ... amplification part, 404 ... power supply part, 405 ... Control part, 406 ... Memory part, 407 ... Interface part, 501 ... Overall control part, 502 ... Connection state confirmation part, 503 ... Weight data input part, 504.・ Weight data correction unit, 5 DESCRIPTION OF SYMBOLS 5 ... Weight calculation part, 506 ... Center of gravity A calculation part, 507 ... Center of gravity B calculation part, 508 ... Center of gravity AB calculation part, 509 ... Measurement data control part, 804 ... Power supply mark 805 ... Connection mark 806 ... Date mark

Claims (5)

A first measuring unit having a flat plate shape and a plurality of conductive rubbers for detecting an external force acting in a direction substantially perpendicular to the plane;
Separate from the first measurement unit, which has a plurality of conductive rubbers having an external dimension substantially equal to the first measurement unit and detecting an external force acting in a direction substantially orthogonal to the plane. A second measuring unit;
A connecting member that connects the side surface of the first measurement unit and the side surface of the second measurement unit so that the same plane is formed by the first measurement unit and the second measurement unit; A weight scale comprising:
A measured value of an external force detected when a calibration jig having a predetermined weight is placed on each conductive rubber disposed in the first and second measurement units, and the predetermined weight. Holding means for holding calibration information in which the relationship with the theoretical value of the external force to be detected when the calibration jig is placed is defined;
When the subject is placed across the first measurement unit and the second measurement unit, the external force detected in each of the conductive rubbers arranged in the first and second measurement units is detected. Obtaining means for obtaining on the condition that the side surface of the first measurement unit and the side surface of the second measurement unit are connected by the connection member;
Correction means for calculating weight data for each conductive rubber by correcting each external force acquired by the acquisition means using calibration information held by the holding means;
A weight scale comprising: weight data calculating means for calculating weight data of the subject by adding weight data for each conductive rubber calculated by the correcting means.   The side surface of the first measurement unit and the side surface of the second measurement unit are pivotally connected via a hinge mechanism, and the connection member includes the first measurement unit and the second measurement unit. The rotation range between the first measurement unit and the second measurement unit is regulated so that an angle between the first measurement unit and the second measurement unit is 180 degrees or less. The scale described. Of the weight data for each conductive rubber calculated by the correction means, by adding the weight data for the conductive rubber disposed in the first measurement unit, one of the subjects Calculate weight data on the foot,
Of the weight data for each conductive rubber calculated by the correction means, by adding the weight data for the conductive rubber disposed in the second measurement unit, the other of the subject The weight scale according to claim 1, further comprising one-leg weight data calculating means for calculating weight data concerning the foot.   A center-of-gravity position calculating means for calculating a center-of-gravity position of the subject based on weight data for each conductive rubber calculated by the correcting means and position information indicating a relative position of the conductive rubber; The weight scale according to claim 1, further comprising: Of the weight data for each conductive rubber calculated by the correction means, the weight data for the conductive rubber arranged in the first measurement unit, and the conductivity in the first measurement unit. Based on the position information indicating the position of the rubber, calculate the position of the center of gravity of one foot of the subject,
Of the weight data for each conductive rubber calculated by the correction means, the weight data for the conductive rubber disposed in the second measurement unit, and the conductivity in the second measurement unit. The weight scale according to claim 1, further comprising one foot center of gravity position calculating means for calculating the center of gravity of the other foot of the subject based on the position information indicating the position of the rubber.