JPH08299289A - Arm-worn portable device and arm-worn pulse wave measuring device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an arm-mounted portable device and arm-mounted pulse wave measuring device suitable for mounting on an arm even if a horizontally long body case is used. [Structure] A horizontally long watch case 11 is used for a device body 10 of the wrist-worn pulse wave measuring device 1. In contrast to the watch case 11, the wrist band 12 is
The connection is made at a position deviated toward the 3 o'clock side from the center position C in the 3 o'clock and 9 o'clock directions. Watch case 11
A battery 59 as a power source and a piezoelectric element 58 are arranged side by side in a plane direction inside the battery, of which the battery 59 is arranged at a position deviated from the central position C in the direction of 3 o'clock. 58 is arranged at a position deviated in the 9 o'clock direction. Therefore, the position G of the center of gravity of the apparatus body 10 is offset from the center position C in the 3 o'clock direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arm-mounted portable device capable of displaying time information and the like, and an arm-mounted pulse wave measuring device capable of displaying pulse wave information such as pulse rate.
More specifically, it relates to the structure technology.

[0002]

2. Description of the Related Art In addition to wrist watches, runner watches with a stopwatch function, wrist-mounted portable radios with a clock function, etc. There is a device that optically detects a change in pulse rate and displays pulse wave information such as a pulse rate based on the detection result. In such an optical pulse wave measuring apparatus, a sensor unit including a light emitting element such as an LED (light emitting diode) and a light receiving element such as a phototransistor is attached to a finger or the like, and a finger or the like (blood vessel) of light emitted from the LED is attached. By receiving the light reflected from the phototransistor with a phototransistor, changes in blood volume are detected as changes in the amount of received light, and based on the detection result, the pulse rate and the like are displayed. Even on mobile devices, wristbands
Connections are made at the center positions of the 3 o'clock and 9 o'clock directions with respect to the 6 o'clock and 12 o'clock positions of the device body.

[0003]

In the arm-worn pulse wave measuring device (arm-worn portable device), a graphic area is added to convey various information in an easy-to-understand manner.
It is necessary to upsize the display unit. Moreover, if the function is to be increased, the size of the device body must be increased, but if the device body is thickened, it becomes an obstacle. Therefore, the device body is enlarged in the plane direction, but it is difficult to greatly enlarge the device body in the directions of 6 o'clock and 12 o'clock, assuming that the device body is attached to the arm. Therefore, inevitably 3
It will expand in the hour and 9 o'clock directions, and the expansion in that direction is relatively unobtrusive as it follows the arm. Therefore, a laterally long body case whose length dimension in the 3 o'clock and 9 o'clock directions is longer than the length dimension in the 6 o'clock and 12 o'clock directions is used for the device body.

However, in the conventional wrist-worn portable device, if the main body of the device is laterally enlarged as it is,
By that amount, the structure is greatly extended in the 3 o'clock direction. For this reason, when the wrist-worn portable device is attached to the arm, the back of the hand feels uncomfortable with the body case each time the wrist is bent, and the back of the hand is easily damaged when the wrist falls, resulting in a structure unsuitable for attachment to the arm. There is a problem.

In view of the above problems, the object of the present invention is to
An object of the present invention is to provide an arm-mounted portable device and an arm-mounted pulse wave measuring device suitable for mounting on an arm even if a horizontally long body case is used.

[0006]

In order to solve the above-mentioned problems, in an arm-mounted portable device according to the present invention, an apparatus main body having a display unit for displaying various kinds of information, and the apparatus main body is used as an arm. In a wrist-worn portable device having a wrist band for wearing on a wristwatch, the device body has lengths of 6 o'clock and 1 o'clock in the directions of 3 o'clock and 9 o'clock in a wristwatch.
A horizontally long main body case longer than the length in the 2 o'clock direction is provided, and the wrist band is connected to the main body case at a position deviated from the center position of the main body case in the 3 o'clock and 9 o'clock directions to the 3 o'clock direction. It is characterized by

In the present invention, the time direction of the wristwatch means only the direction of the device body, and does not mean that the display on the device body is of the pointer type.

In the present invention, when the main body of the apparatus is provided with the flat battery and the flat piezoelectric element in the main body case, the piezoelectric element and the battery are placed in the main body case in the directions of 3 o'clock and 9 o'clock in the wristwatch. It is preferable to arrange them in a plane.

Further, it is preferable that the center of gravity of the device main body in the 3 o'clock and 9 o'clock directions of the wristwatch is deviated in the 3 o'clock direction from the center position in this direction.

The wrist-worn portable device has a sensor unit in which the light emitting portion and the light receiving portion are directed toward the finger surface, and a cable extending from the sensor unit for inputting the light receiving result of the light receiving portion to the apparatus main body. And a data processing circuit which is built in the main body of the apparatus and obtains the pulse wave information to be displayed on the display unit based on the light reception result of the light receiving unit, whereby the pulse wave information such as the pulse rate can be displayed on the display unit. It can be configured as a wrist-worn pulse wave measuring device.

[0011]

In the wrist-worn portable device (arm-worn pulse wave measuring device) according to the present invention, a horizontally long body case is used for the body of the device, and the body case is biased toward the 3 o'clock direction. Since the wristband is connected to the position, the main body of the device has a structure in which the wristwatch is largely overhanging in the 9 o'clock direction when viewed from the wristband, but there is no large overhanging portion in the 3 o'clock direction. Therefore, when the wrist-worn pulse wave measuring device is attached to the left hand, the wrist can be freely bent in spite of using the horizontally long body case. Moreover, since there is no large overhang in the 3 o'clock direction, the back of the hand will not hit the body case even when it falls.

Utilizing the use of the horizontally long body case, when the battery and the piezoelectric element are arranged in a plane in the directions of 3 o'clock and 9 o'clock in the wristwatch, the device body is made thin. it can. Further, when the battery and the piezoelectric element are arranged in a plane, the battery can be easily replaced by the user by providing the battery cover on the back surface of the apparatus body.

When the center of gravity of the wristwatch in the directions of 3 o'clock and 9 o'clock is biased in the direction of 3 o'clock, the wrist band is connected to the side where the center of gravity is biased. Therefore, the main body of the apparatus can be stably attached to the arm.

In the wrist-worn pulse wave measuring device including such wrist-worn portable device, when the device body and the sensor unit are connected by a cable, the sensor unit can be used while being worn on the finger, so that it can be used while running. Pulse wave can be measured.

[0015]

An embodiment of the present invention will be described with reference to the drawings.

(Overall Structure) FIG. 1 is an explanatory view showing a usage state of the wrist-worn pulse wave measuring apparatus of this example.

In FIG. 1, an arm-mounted pulse wave measuring device 1 (arm-mounted portable device) of this example is a device body 10 (device body) having a wristwatch structure, and a cable 20 connected to the device body 10. And a sensor unit 30 provided on the tip side of the cable 20. The device body 10 is provided with a wrist band 12 that is wound around an arm of the wristwatch from the 12 o'clock direction and fixed at the 6 o'clock direction.
0 is detachable from the arm. The sensor unit 30 includes a sensor fixing band 40 having a width of about 10 mm,
The sensor fixing band 40 is worn between the base of the index finger and the finger joint.

(Structure of Device Main Body) FIG. 2 is a plan view showing the device main body of the wrist-worn pulse wave measuring device of this embodiment with the wristband and cables removed, and FIG. 3 shows the device main body. 4 is a bottom view, FIG. 4 is an explanatory view of the main body of the wristwatch as viewed from the 6 o'clock direction, and FIG. 5 is an explanatory diagram of the main body of the device as viewed from the 3 o'clock direction in the wristwatch.

In FIG. 2, the main body 10 of the device is provided with a resin watch case 11 (main body case), and on the surface side of the watch case 11, in addition to the current time and date, the pulse rate and other pulses are displayed. A liquid crystal display device 13 (display unit) that digitally displays wave information and the like is configured. Inside the watch case 11, a data processing circuit 5 that performs signal processing on the detection signal in order to display changes in the pulse rate based on the detection result (pulse wave signal) by the sensor unit 30.
0 is built in, and the data processing circuit 50 and the liquid crystal display device 13 constitute an information display means 60. Further, since the data processing circuit 50 is also configured with a clock circuit, the information display means 60 can also display the normal time, lap time, split time, etc. on the liquid crystal display device 13.

Button switches 111 to 115 for adjusting the time and switching the display mode are formed on the outer peripheral portion of the watch case 11. Further, the button switches 116, 11 are provided on the surface of the watch case 11.
7 are configured. As shown in FIG. 2, the power source of the wrist-worn pulse wave measuring device 1 is a button type battery 59 built in the watch case 11, and the cable 20 is a battery 5
While supplying power from 9 to the sensor unit 30,
The detection result of the sensor unit 30 is input to the data processing circuit 50 in the watch case 11.

In the arm-worn pulse wave measuring apparatus 1, it is necessary to increase the size of the apparatus main body 10 as its function is increased. However, the apparatus main body 10 has a restriction that it is worn on the arm. The device body 10 cannot be enlarged in the direction of 6 o'clock and 12 o'clock in the wristwatch. Therefore, in the present example, as shown in FIG. 2, the device main body 10 has a horizontally long watch case 11 in which the length dimension in the directions of 3 o'clock and 9 o'clock is longer than the length dimension in the directions of 6 o'clock and 12 o'clock. Is used.

The wristband 12 is connected to the watch case 11 at a position deviated to the 3 o'clock side from the center position C of the watch case 11 in the 3 o'clock and 9 o'clock directions. Therefore, when viewed from the wristband 12, the device main body 10 has the large overhanging portion 101 in the 9 o'clock direction of the wristwatch, but the large overhanging portion is not in the 3 o'clock direction.

3 and 4, inside the watch case 11, a flat battery 59 as a power source and a flat piezoelectric element 58 for a buzzer are oriented in the plane direction (at 3 o'clock and 9 o'clock in a wristwatch). Since the apparatus main body 10 can be made thin, and the battery cover 118 is provided on the back surface 119 of the apparatus main body 10, the user can operate the battery 59.
The structure allows for easy replacement.

The battery 59 is arranged at a position deviated in the 3 o'clock direction from the center position C, while the piezoelectric element 58 is arranged in a position deviated in the 9 o'clock direction from the center position C. It is located in. Since the battery 59 is heavier than the piezoelectric element 58, the center of gravity position G of the apparatus body 10 in the 3 o'clock and 9 o'clock directions is at a position deviated from the center position C in the 3 o'clock direction. . Therefore, the wrist band 12 is connected to the side where the center of gravity is biased.

An analog circuit substrate 501 and a digital circuit substrate 502 having a data processing circuit 50 are arranged on the front surfaces of the piezoelectric element 58 and the battery 59 so as to overlap each other, and the liquid crystal display device is arranged on the front surface side. 13 are arranged so as to overlap. Further, as can be seen from FIG. 4, the cover glass 13 is provided on the front surface side of the liquid crystal display device 13.
1 is covered.

(Structure for Preventing Rotation of Device Main Body) In FIG. 5, the stopper shaft 1 attached to the end portion of the wristband 12 in the 12 o'clock direction of the outer peripheral portion of the watch case 11.
A connecting portion 105 for holding 21 is formed.
On the other hand, of the outer peripheral portion of the watch case 11, in the 6 o'clock direction,
The wristband 12 wound around the arm is folded back at an intermediate position in the length direction, and a receiving portion 106 to which a fastener 122 for holding the intermediate position of the wristband 12 is attached is formed.

In the 6 o'clock direction of the apparatus body 10, a flat back surface portion 119 to which the battery lid 118 and the like are attached.
The portion extending from the edge to the receiving portion 106 is integrally formed with the watch case 11 to form a rotation stopping portion 108 which makes an angle of about 115 ° with the back surface portion 119. Therefore, when the wrist-worn pulse wave measuring apparatus 1 of this example is mounted by the wrist band 12 so that the apparatus body 10 is located on the upper surface L1 (back of the hand) of the right wrist L (arm), the watch case 11
The back surface portion 119 of the wrist closely contacts the upper surface portion L1 of the wrist L, while the rotation stopping portion 108 forms the side surface portion L2 on the radius R side of the arm.
Is in contact with. In this state, the back surface part 119 of the apparatus body 10 feels to straddle the radius R and the ulna U of the arm through the skin, while the bending part 109 between the rotation stopping part 108 and the back surface part 119 extends from the rotation stopping part 108. Is a feeling of contact with the radius R of the arm through the skin.

In this way, the rotation stopping portion 108 and the back surface portion 1
Since 19 is an anatomically ideal angle of about 115 °, from the state shown in FIG. 5, the device body 10 in the direction of arrow A, that is, the device body 10 around the wrist L. Even when trying to rotate from the front side to the other side, the rotation stopping portion 12 does not shift further while being in contact with the side surface portion L2 of the wrist L. On the contrary, the device body 10 in the direction of the arrow B,
That is, even if the device body 10 is rotated around the wrist L toward the front side, the back surface portion 119 of the device body 10 is kept in contact with the upper surface portion L1 of the wrist L and is not further displaced. Further, since the device body 10 is not in a state of being completely in close contact with the wrist L and there is a partial gap between the device body 10 and the surface of the wrist L, even if the rotation stopping portion 108 is provided, the feeling of wearing is impaired. Never. Further, the back surface portion 119 and the rotation stopping portion 10
It only regulates the rotation around the arm at two places on one side by 8. Therefore, even if the arm is thin, the back surface portion 119 and the rotation stopping portion 108 are surely brought into contact with the arm, so that the rotation stopping effect can be surely obtained, and even if the arm is thick, there is no cramped feeling.

It should be noted that it can be confirmed that the apparatus body 10 can be prevented from rotating around the arm by setting the angle formed by the back surface portion 119 and the rotation stopping portion 108 in the range of about 105 ° to about 125 °. There is. Further, the arm-mounted pulse wave detection device 1 may be mounted so that the device body 10 is located on the lower surface L3 (palm side) of the wrist L. In this case, the rotation stopper of the device body 10 is attached. The arm 108 is in contact with the side surface portion L4 of the arm on the ulnar U side. Even in this state, the device body 1
0 does not rotate unnecessarily when a force is applied in either direction of arrow A or arrow B.

(Structure of Sensor Unit) FIG. 6A shows
FIG. 6B is a plan view of an optical unit of a sensor unit used in the wrist-worn pulse wave measuring device of the present embodiment. FIG. 6B shows a sensor fixing band of the sensor unit used in this wrist-worn pulse wave measuring device. FIG. 6C is a plan view showing a state, FIG. 6C is an explanatory view showing the structure of another sensor unit, and FIG. 7 is an explanatory view showing a state in which the sensor unit is attached to the base of a finger.

Referring again to FIG. 1, the sensor unit 30
Is composed of a sensor fixing band 40 and an optical unit 300. The sensor fixing band 40 is made of a flexible and thick resin molded product, and when the sensor fixing band 40 is rolled up and wound around the base of a finger, the hand is released as it is. Due to its own shape restoring force, it becomes a state of being wrapped around the base of the finger.

The substantially central portion of the sensor fixing band 40 is
Further, the hole 41 is thicker and a hole 41 for accommodating the optical unit 300 is formed therein.

In FIG. 6A, the optical unit 300
Is covered with resin in a rectangular shape having a pair of protrusions 311 and 312 on both sides.
The cable 20 is pulled out from the inside of 0.

On the other hand, in FIG. 6B, the hole 41 of the sensor fixing band 40 has such a shape and size that the optical unit 300 can be fitted therein, and when the optical unit 300 is fitted therein. , The protruding portion 311,
Recesses 411 and 412 into which 312 is fitted are formed to prevent falling. In addition, the sensor fixing band 40 is formed with four twisted portions 410 at the four positions so that it can be easily worn on a finger.

With respect to the sensor unit 30, from the viewpoint that it is only necessary to lightly grasp the hand even if it is attached to the base of the finger, there is no problem even if the width of the sensor fixing band 40 is about 20 mm. Further, as shown in FIG. 6C, the sensor fixing band 40 may have a structure in which only the width of a portion to which the optical unit 300 is attached is slightly widened.

In FIG. 7, in the optical unit 300,
The sensor frame 301 as the case body is covered with the back cover 302, and the inside thereof serves as a component storage space. A light transmission window is formed by a glass plate 304 (filter) on the upper surface of the sensor frame 301, and a circuit board 305 is fixed inside the sensor frame 301 so as to face the glass plate 304. Electronic components such as the LED 31, the phototransistor 32, and a transistor (not shown) are mounted on the circuit board 305. The LED 31 and the phototransistor 32 have a light emitting surface and a light receiving surface facing the glass plate 304, respectively.

In this example, InGaN is used as the LED 31.
System (indium-gallium-nitrogen system) blue LED is used, and its emission spectrum is as shown in FIG.
It has an emission peak at 450 nm and its emission wavelength range is
It is in the range of 350 nm to 600 nm. In this example, a GaAsP-based (gallium-arsenic-phosphorus-based) phototransistor is used as the phototransistor 32 so as to correspond to the LED 31 having such light emission characteristics.
As shown in FIG. 9, the light-receiving wavelength region of the device itself has a main sensitivity region in the range of 300 nm to 600 nm, and there is a sensitivity region even below 300 nm. Here, as the phototransistor 32, a sensor unit in which a filter is added to an element may be used, and an example of a light receiving wavelength region of such a sensor unit has a main sensitivity region from 400 nm to 550 nm as shown in FIG. Is in the range. Since the LED 31 and the phototransistor 32 consume relatively little power, even when the timekeeping function and the pulse wave measuring function are driven by one small battery as in the wrist-worn pulse wave measuring apparatus 1 of this example, Long continuous operation time.

As shown in FIG. 7, the optical unit 3
00 is the glass plate 30 for the sensor fixing band 40.
4 is attached so as to face inward, so when the sensor fixing band 40 is attached to the base of the finger, the LED 31
And, the phototransistor 32 is in a state in which the light emitting surface and the light receiving surface thereof face the surface of the finger. Therefore, L
When light is emitted from the ED31 toward the finger, a living body (blood vessel)
The phototransistor 32 receives the light reflected from the phototransistor 32, and receives the light reception result (pulse wave signal).
Is input to the apparatus main body 10 via the cable 20, the apparatus main body 10 obtains the pulse rate from the pulse wave signal.

(Structure of Data Processing Circuit) That is, FIG.
1, a part of the function of the data processing circuit configured inside the watch case is shown in a block diagram. In the data processing circuit 50, the pulse wave signal conversion unit 51 is connected from the sensor unit 30 to the cable 20. The input signal is converted into a digital signal and output to the pulse wave signal storage unit 52. The pulse wave signal storage unit 52 is a RAM that stores the pulse wave data converted into a digital signal. The pulse wave signal calculation unit 53 reads the signal stored in the pulse wave signal storage unit 52, performs frequency analysis on the signal, and inputs the result to the pulse wave component extraction unit 54. The pulse wave component extraction unit 54 extracts the pulse wave component from the input signal from the pulse wave signal calculation unit 53 and outputs it to the pulse rate calculation unit 55, and the pulse rate calculation unit 55 determines the frequency of the input pulse wave. The pulse rate is calculated from the components, and the result is output to the liquid crystal display device 13.

(Construction of Connector Portion) FIG. 12 is an enlarged view of the state in which the connector piece is attached to the connector portion as seen from the 3 o'clock direction in the wristwatch, and FIG. 13 is an electrode portion of the sensor circuit on the connector piece side, and It is explanatory drawing which shows the combination of this sensor circuit and the terminal by the side of a connector part for inputting / outputting a signal.

As shown in FIG. 1, the cable 20 and the sensor unit 30 are provided so that the wrist-worn pulse wave measuring apparatus 1 of this embodiment can be handled in daily life like a normal wristwatch.
It can be attached and detached on the surface side of the end portion of the apparatus body 10 which is located in the 6 o'clock direction. That is, in FIG. 12, in the 6 o'clock direction of the end portion of the apparatus main body 10,
A connector portion 70 is formed on the surface side of the portion extended as the rotation stopping portion 108, and the cable 2 is provided therein.
The connector piece 80 (connector member) configured at the end portion of 0 can be mounted. Therefore, if the sensor unit 30 and the cable 20 are detached from the apparatus main body 10, it can be used as an ordinary wristwatch, which is convenient.

Further, the connector portion 70 is fixed to the rotation stopping portion 108.
Since it is formed on the surface portion of the portion corresponding to, the extended portion for providing the rotation stopping portion 108 can be used as it is as the connector portion 70. Moreover, the connector portion 70
Is located in the 6 o'clock direction, so that when the apparatus main body 10 is worn on the arm, the connector portion 70 is on the front side when viewed from the user, and the operation is easy. In addition, the connector portion 70
Does not project from the device body 10 in the 3 o'clock direction,
The user can freely move his / her wrist during running, and even if the user falls down during running, the back of the hand does not hit the connector portion 70.

The electrical connections made in this connector 70 and connector piece 80 (connector means) are as shown in FIG.

In FIG. 13, terminals 751 to 756 are provided on the connector section 70 formed on the apparatus main body 10 side.
(First terminal group), and these terminals 75
Corresponding to 1 to 756, the connector piece 80 is provided with electrode portions 831 to 836 (second terminal group).
Among them, the terminal 752 is the LED through the electrode portion 832.
31 is a positive terminal for supplying the second drive voltage VDD to the terminal 31, a terminal 753 is a terminal to be a negative potential of the LED 31 via the electrode portion 833, and a terminal 754 is an electrode portion 83.
Terminal for supplying a constant voltage VREG for driving to the collector terminal of the phototransistor 32 via
Reference numeral 1 denotes a terminal to which a signal from the emitter terminal of the phototransistor 32 is input via the electrode portion 831, and a terminal 755.
Is a terminal to which a signal for detecting whether or not the connector piece 80 is attached to the connector portion 70 is input via the electrode portion 835. The electrode unit 836 is used in the sensor unit 3
When 0 is grounded to the human body and the terminal 756 and the electrode portion 836 are electrically connected, VDD is used as a ground line to shield the electrode portions 831 to 836.

Further, in the connector piece 80, the LED 3
The first capacitor C1 and the first switch SW1 are interposed between the first terminals (between the electrode portions 832 and 833). The switch SW1 is in a closed state when the connector piece 80 is detached from the connector portion 70, the first capacitor C1 is connected in parallel to the LED 31, and the switch SW1 is opened when the connector piece 80 is attached to the connector portion 70. It becomes a state. Similarly, the phototransistor 3
2 terminals between the two terminals (electrode portions 831 and 834)
The capacitor C2 and the second switch SW2 are inserted. This switch SW2 is a connector piece 8
When 0 is removed from the connector part 70, it becomes a closed state,
The second capacitor C2 for the phototransistor 32
Are connected in parallel, and the connector piece 80 is connected to the connector portion 70.
It will open when it is attached to the.

Further, the structures of the connector portion 70 and the connector piece 80 will be described in detail with reference to FIGS. 14 to 17.

FIG. 14 is an enlarged view showing the structure of the connector piece formed at the end of the cable, FIG. 15 is an enlarged view of the connector section on the apparatus main body side, and FIG. 16 is the connector piece with respect to the connector section. FIG. 17 is a vertical cross-sectional view showing the combined state, and FIG. 17 is an explanatory view showing the arrangement of the electrode portions on the connector piece side and the circuit pattern.

In FIG. 14, the lower surface 801 of the connector piece 80 is formed with a pair of protrusions 81 and 82 projecting downward on both sides thereof. Four engaging pieces 811, 812, 821, 822 (second engaging projection group) project inward from the lower ends of the protruding portions 81, 82.

On the lower surface 801 of the connector piece 80,
Six electrode parts 831, 832, 833, 834, 83
5, 836 (second terminal group) are formed, and annular ridges 841, 842, 843, 844, and
845 and 846 are formed. Here, when the connector piece 80 is attached to the connector portion 70, the connector piece 80 is covered with the connector portion 70 and then the connector piece 80 is slid in the direction of arrow Q, as described later. Along the direction of arrow Q),
The electrode portions 831 to 836 are the electrode portions 831, 832, and 83.
3 and electrode portions 834, 835, 836 are formed in two rows. Further, in any of the columns, the electrode parts 831 to 8
36 is obliquely arranged so as to be displaced in a direction orthogonal to the sliding direction of the connector piece 80 (direction of arrow Q).

Further, on the bottom surface of the connector piece 80, two operation pins 837 and 838 for switching a circuit for preventing the influence of static electricity when the cable 20 is connected to the apparatus body 10 are formed. . These operating pins 837 and 838 are in a state in which the tips project from the lower surface portion 801 of the connector piece 80 when the connector piece 80 is removed from the connector portion 70.

On the other hand, as shown in FIG.
0, the engaging portions 71, 72, 73, 74 protruding outward.
(First engaging projection group) is formed. Therefore, the protruding portions 81 and 82 of the connector piece 80 are
Of the engaging portions 71, 72, 73, 74 are located outside, and between the engaging portions 71 and 72, and the engaging portion 73.
And the engaging portion 74, the engaging piece 8 of the connector piece 80.
After the connector piece 80 is covered with the connector part 70 so that the position of 11, 821, the engaging pieces 811, 821 are between the engaging part 71 and the engaging part 72, and between the engaging part 73 and the engaging part 73. The connector piece 80 is pressed toward the connector portion 70 so as to pass through the connector portion 70 (first operation for attaching the connector piece 80 to the connector portion 70), and then in the direction of the arrow Q (connector piece 70). 80
When the connector piece 80 is slid in the mounting direction of the device main body 10 from the 6 o'clock direction to the 12 o'clock direction (second operation for mounting the connector piece 80 on the connector part 70), the engaging part 71, 73 under the engaging pieces 811, 821
Goes under. Further, the engaging piece 81 is provided below the engaging portions 72 and 74.
2,822 sneak in. As a result, the engagement pieces 811, 82
1, 812 and 822 are lower surface portions 8 of the connector piece 80.
01, the engaging portions 71, 72, 73, 74 are held, respectively, and the connector piece 80 is easily and surely attached to the connector portion 70.

Here, like the electrode portions 831 to 836, the terminals 751 to 756 are arranged along the sliding direction of the connector piece 80 (direction of arrow Q), and the terminals 751 to 752,
753 and terminals 754, 755, 756 are formed in two rows. Further, in each row, each terminal 751 to 75
6 is the connector piece 8 similar to the electrode parts 831 to 836.
It is obliquely arranged so as to be displaced in a direction orthogonal to the sliding direction of 0 (direction of arrow Q). Therefore, when the connector piece 80 is attached to the connector section 70, the six terminals 751 to 75 are corresponding to the six electrode sections 831 to 836.
6 can be electrically connected to each other, and the measurement result of the sensor unit 30 can be input to the apparatus main body 10 via the cable 20.

The terminals 751 to 756 and the electrode portions 831 to 836 are arranged in two rows along the sliding direction of the connector piece 80, and between the terminals and between the electrodes in the direction orthogonal to the sliding direction. Since the position between them is slanted, the connector piece 80 is attached to the connector portion 70.
Even if you slide it on, it does not correspond to terminals 751 to 75
6 does not come into contact with the electrode portions 831 to 836. Further, even if the area where the connector portion 70 is formed is narrowed, the terminals and the electrode portions can be arranged at positions distant from each other. Therefore, even if water enters between the connector piece 80 and the connector portion 70, the terminals and It is difficult to short circuit between electrodes. In addition, terminals 752, 754, 7 to which drive voltage is applied
Since 56 and the electrode portions 832, 834, and 836 are arranged particularly apart from each other, tracking does not occur between terminals having different potentials and between electrode portions.

When removing the connector piece 80 from the connector portion 70, the connector piece 80 is slid in the opposite direction of arrow R. As a result, the engagement pieces 811, 821
Between the engaging portion 71 and the engaging portion 72, and the engaging portion 73.
And returns to the position between the engaging portion 74 and the engaging portion 74. Therefore, if the connector piece 80 is lifted as it is, the connector piece 80 can be easily and surely removed from the connector portion 70.

In this way, the connector piece 80 is engaged when it is slid on the connector portion 70 in the direction of arrow Q, and from this state, the connector piece 80 is slid in the opposite direction (direction of arrow R). An engagement mechanism 700 is configured to be released from the engaged state when the engagement mechanism 700 is operated. The engagement mechanism having such a structure has a small number of parts, but the engagement is reliable.

Further, the connector piece 80 is attached to the connector portion 7
The force applied to the main body 10 of the device when it is slid from 0 o'clock direction to 02:00 o
8, the device body 10 is oriented so that it is more difficult to rotate. Therefore, even when the connector piece 80 is mounted, the apparatus body 10 does not rotate around the wrist, and thus the mounting is easy.

(Structure of Stopper Mechanism) As can be seen from FIG. 15, the engaging portions 71 to 74 are provided with vertical walls 711, 721, 731 and 741 on the side in the direction of arrow Q. Therefore, when the connector piece 80 is slid in the direction of the arrow R when the connector piece 80 is attached to the connector portion 70 (second operation), the engaging pieces 811, 81
2, 821, 822 are vertical walls 711, 721, 73
1, 741, respectively, and the connector piece 80 is stopped at the mounting position of the connector portion 70. That is, the vertical walls 711, 721, 731, 741 function as a first stopper for the connector piece 80.

On the contrary, the connector piece 80 is attached to the connector portion 7
When it is slid in the direction of arrow R in order to remove it from 0, the engaging pieces 811, 821 abut against the back sides of the vertical walls 721, 741 of the engaging portions 72, 74, respectively, and the connector piece 8
0 stops the connector unit 70 at the original position. That is, the back side of the vertical walls 721 and 741 is the connector piece 8
It functions as a second stopper for 0.

(Structure of terminals and electrodes) Connector 7
0, the terminals 751 to 756 are all holes 761, 762, 763, 76 formed in the connector section 70.
4, 765 and 766, and a cross section of the terminal 753 and 756, the operation pin 838, and the electrode portions 833 and 836 cut at a position passing therethrough is shown in FIG. .

In FIG. 16, the connector piece 80 is
An outer case 805 capable of accommodating the circuit board 85 inside is covered with a lid member 806. The lid member 806 includes
Holes 863 and 866 are formed, and annular protrusions 843 and 846 are formed along the opening edge on the lower side thereof. Electrode portions 833 and 836 are arranged inside the holes 863 and 866. The electrode portion 833 is fixed by a screw 881, and the electrode portion 836 is fixed by being sandwiched between the circuit board 85 and the lid member 806. Waterproof packings 873 and 876 are attached to the electrode portions 833 and 836. The electrode portions 833 and 836 are electrically connected to the circuit pattern of the circuit board 85 arranged inside the connector piece 80. Such an electrode structure has electrode parts 833, 8
The same applies to the electrode parts 831, 832, 834, and 835 other than 36. In addition, on the circuit pattern of the circuit board 85,
The core wire of the cable 20 is also electrically connected by soldering.

(Construction of Click Mechanism) The connector portion 70 has a structure in which the recess is covered with the lid member 706.
Holes 763 and 766 are formed in the lid member 706. Inside these holes 763 and 766, terminals 753,
756 is arranged as an advance / retreat pin capable of advancing / retreating so that the tip end is projected from the holes 763 and 766. Collar 7 formed on the base side of each terminal 753, 756
Coil springs 773 and 776 are arranged for 83 and 786, and the terminals 753 and 756 are urged by the coil springs 773 and 776 in a direction projecting from the holes 763 and 766. . However, Tsuba 78
Since the outer diameter of 3, 786 is larger than the inner diameter of the holes 763, 766, the terminals 753, 756 will not come out of the holes 763, 766. This terminal structure has a terminal 7
Terminals 751, 752, 754, 75 other than 53, 756
5 is also the same.

When the connector piece 80 is mounted on the connector portion 70, the connector piece 80 is attached to the connector portion 7.
In order to slide on 0, the terminals 753, 756 pass over the annular protruding portions 843, 846 of the connector piece 80 while being biased by the coil springs 773, 776, and are securely connected to the electrode portions 833, 836. To do. Further, since the click mechanism is configured by using the ridges 843 and 846, the terminals 753 and 756, and the coil springs 773 and 776 as they are, the connector piece 80 can be reliably attached to the connector unit 70. In order to configure such a click mechanism, contrary to the present example, a terminal using an advancing / retreating pin may be provided on the connector piece 80 side and a ridge portion may be provided on the connector section 70 side.

(Structure of Switch Mechanism) Connector Piece 8
A hole 868 is formed in the cover member 806 of No. 0, and an operation pin 838 is arranged in the hole 838. The actuating pin 838 is in a state capable of advancing and retracting inside the hole 868 so that the distal end thereof projects from the hole 868.
A switch spring 88 in the form of a leaf spring is arranged with respect to the collar portion 898 formed at the base of the operation pin 838. The switch spring 88 biases the actuating pin 838 in a direction projecting from the hole 868 by the tip portion 885 thereof. However, since the outer diameter of the collar 898 is larger than the inner diameter of the hole 868, the operating pin 838 does not come out of the hole 868. The base of the switch spring 88 is the electrode portion 83.
3 is fastened to the upper end surface of No. 3 by a screw 881,
It is electrically connected to 3.

In FIG. 17, the tip portion 885 of the switch spring 88 is in contact with the base portion of the operating pin 838.
86, and a contact 887 formed in a portion protruding laterally therefrom. The contact 887 is electrically connected to the circuit pattern 852 of the circuit board 85.
Although not shown, the circuit pattern 852 is interposed between the first capacitor C1 and the electrode portion 833.

Therefore, in a state where the connector piece 80 is not attached to the connector portion 70, as shown by a solid line in FIG. 16, the operating pin 838 is pushed by the switch spring 88 and its tip projects from the hole 868. In this state, The contact 887 of the switch spring 88 is connected to the circuit pattern 85 of the circuit board 85.
2 is electrically connected. That is, in FIG. 13, the first switch SW1 is closed and the first capacitor C1 is interlocked with the movement of the operation pin 838 indicated by the arrow.
Is in a state of being electrically connected in parallel to the LED 31. Therefore, even if something having a high potential due to static electricity touches the electrode portions 832 and 833, the electric charge is accumulated in the first capacitor C1 and the LED 31 is not damaged.

On the other hand, when the connector piece 80 is attached to the connector portion 70, the operating pin 838 moves in the direction of retracting into the hole 868 to move the switch spring 88, as shown by the chain double-dashed line in FIG. It is deformed as shown by the chain double-dashed line. When the switch spring 88 is deformed in this way, the contact 887 is formed on the circuit pattern 8 of the circuit board 85.
It rises from 52, and the electrical connection is cut off. That is, in FIG. 13, when the connector piece 80 is attached to the connector portion 70, the first switch SW1
Is in an open state, and has a circuit configuration capable of measuring a pulse wave. Moreover, even if the electric charge is accumulated in the first capacitor C1, the electric charge is not discharged through the electrode portions 832 and 833 and the terminals 752 and 753, so that it is built in the connector portion 70 and the apparatus main body 10. Each circuit is not damaged.

Further, such a switch mechanism has a simple structure, but the connector piece 80 to the connector portion 70 is provided.
Reliably works with the mounting operation of.

The switch mechanism having such a configuration is
As shown in FIG. 13, it is also configured for the phototransistor 32, but the configuration uses an operating pin 837 and a switch spring 89 as in the switch mechanism for the LED 31, as can be seen from FIG. Therefore, the description thereof will be omitted.

(Construction of Connector Cover) FIG. 18 shows a connector piece when the arm-mounted pulse wave measuring apparatus 1 is used as a normal wristwatch by removing the cable 20 and the sensor unit 30 from the arm-mounted pulse wave measuring apparatus 1. Instead of 80
FIG. 6 is an explanatory diagram showing a configuration of a connector cover 90 mounted on the connector unit 70.

Unlike the connector piece 80, the connector cover 90 does not require an electrode portion, a sensor circuit, and a cable, and thus is thin overall and has a shape that does not impair the appearance when mounted on the connector portion 70. . However, the mounting structure for the connector portion 70 has the same configuration as the connector piece 80. That is, the lower surface portion 901 of the connector cover 90 is formed with a pair of protruding portions 91 and 92 that project downward on both sides thereof. Four engaging pieces 911, 912, 921, 922 (second engaging projection group) project inward from the lower ends of the projecting portions 91, 92. The lower surface 901 of the connector cover 90 has terminals 7 of the connector 70.
Corresponding to the positions where 51 to 756 are arranged, the terminals 7
51 to 756 and the ridge portion 941 forming the click mechanism
946 is formed.

When the connector cover 90 is attached to the connector portion 70, like the connector piece 80, the engaging portion 71 is used.
The connector cover 90 so that the engaging pieces 911 and 921 of the connector cover 90 are located between the engaging portion 72 and the engaging portion 72, and between the engaging portion 73 and the engaging portion 74.
Connector cover 90 so that the engaging pieces 911 and 921 pass through between the engaging portion 71 and the engaging portion 72 and between the engaging portion 73 and the engaging portion 74, respectively. When the connector cover 90 is pressed in the direction of arrow 70 and then the connector cover 90 is slid in the direction of the arrow Q (direction from 6 o'clock to 12 o'clock of the apparatus body 10), the engaging portions 71, 7
Engaging pieces 911 and 921 sneak into under 3. Further, the engaging pieces 912 and 922 sneak under the engaging portions 72 and 74.
As a result, the engagement pieces 911, 921, 912, 922 are
The engaging portion 7 is formed between the connector cover 90 and the lower surface portion 901.
The terminals 751 to 756 of the connector portion 70 pass over the ridge portions 941 to 946 and exert a click force while holding 1, 72, 73, and 74, respectively.
In this way, the connector cover 90 has the connector portion 7
It will be in a state of being attached to 0.

(Operation) The operation of the wrist-worn pulse wave measuring device 1 thus configured will be briefly described with reference to FIGS. 1 and 7.

First, in FIG. 1, when the wrist-worn pulse wave measuring device 1 is used as a normal wristwatch, a cable 2 is used.
0 and the sensor unit 30 are removed by the connector portion 70 of the device body 10, the device body 10 is attached to the wristband 1
Wear on arm 2 At this time, the connector cover 90 shown in FIG. 18 is attached to the connector portion 70 to enhance its appearance and protect the connector portion 70.

On the other hand, when the pulse rate during running is measured using the wrist-worn pulse wave measuring device 1, after the connector piece 80 is attached to the connector part 70 and the cable 20 is connected to the device body 10. The device body 10 is worn on the wrist with the wristband 12. Further, the sensor unit 30 (the glass plate 304 of the optical unit 300) is brought into close contact with the finger by the sensor fixing band 40, and then running is performed.

In this state, as shown in FIG.
When light is emitted from 1 toward the finger, the light reaches the blood vessel, and is partially absorbed by hemoglobin in the blood and partially reflected. The light reflected from the finger (blood vessel) is received by the phototransistor 32, and the change in the amount of received light corresponds to the change in blood volume caused by the pulse wave of blood. That is, when the blood volume is large, the reflected light becomes weaker,
As the blood volume decreases, the reflected light becomes stronger, so if the change in the reflected light intensity is monitored by the phototransistor 32, the pulse or the like can be detected. In order to perform such detection, FIG.
In the data processing circuit 50 shown in, the signal input from the phototransistor 32 (sensor unit 30) is converted into a digital signal, and the digital signal is subjected to frequency analysis or the like to calculate the pulse rate. Then, the pulse rate calculated is displayed on the liquid crystal display device 13. That is,
The wrist-worn pulse wave measuring device 1 functions as a pulse meter.

Again, in FIG. 7, a part of the light emitted from the LED 31 reaches the blood vessel through the finger as indicated by arrow C, and the reflected light from hemoglobin in the blood is indicated by arrow D. To reach the phototransistor 32.
The amount of light received through this path is the biological reflection amount. Also,
A part of the light emitted from the LED 31 is reflected on the finger surface as shown by an arrow E and reaches the phototransistor 32. The amount of light received through this path is the amount of skin reflection. Further, a part of the light emitted from the LED 31 and the light reflected from the blood vessel is absorbed or dispersed in the finger as shown by arrows F and G and does not reach the phototransistor 32.

Further, in the sensor unit 30, the LE having an emission wavelength region in the range of 350 nm to 600 nm is used.
D31 and the phototransistor 32 having a light receiving wavelength range of 300 nm to 600 nm are used, and biometric information is displayed based on the detection result in the overlapping wavelength range of about 300 nm to about 600 nm. By using the sensor unit 30, of the light included in the outside light, the light having a wavelength range of 700 nm or less does not reach the phototransistor 32 (light receiving portion) using the finger as a light guide, while the light having a wavelength of 300 nm or less is used. , Almost absorbed on the skin surface. Therefore, the detection result is not affected by external light and is approximately 300n based on only the light of the light emitting unit.
Biological information can be measured from the detection result in the wavelength range from m to about 600 nm. From the viewpoint of obtaining pulse wave information without being affected by outside light, L
The ED31 has an emission wavelength range of 300 nm to 700
Phototransistor 32 with a range up to nm
As the light receiving wavelength region, a light receiving wavelength region of 700 nm or less may be used.

(Effects of the Embodiment) In the wrist-worn pulse wave measuring device 1 of this embodiment, the device body 10 is provided with a horizontally long watch case 11, and the watch case 11 is provided on the 3 o'clock side. The wristband 12 is connected at an unbalanced position. Therefore, when the wrist-worn pulse wave measuring device 1 is worn on the left hand by the wristband 12, there is no large overhang portion in the 3 o'clock direction as shown in FIG. Therefore, the wrist is freely bendable even though the horizontally long watch case 11 is used, and the wearing feeling is good. Moreover, 3
Since there is no large overhanging portion in the time direction, the back of the hand will not hit the watch case 11 even when it falls. Further, the large overhanging portion 101 located in the 9 o'clock direction is supported in close contact with the arm surface on the elbow side, so that the arm-mounted pulse wave measuring apparatus 1 is in a stable state. Therefore,
Even if the horizontally long watch case 11 is used, there is no need to use the unnecessarily wide wrist band 12.

Utilizing the fact that the watch case 11 is horizontally long, the battery 59 and the piezoelectric element 58 are housed in the watch case 11 in three pieces.
Since they are arranged in a plane in the directions of 9 o'clock and 9 o'clock, the device body 10 can be made thin. Further, since the battery 59 and the piezoelectric element 58 are arranged so as to be offset from each other, the user can easily replace the battery 118 by removing the battery lid 118.

Moreover, in the apparatus main body 10, the center of gravity position G in the directions of 3 o'clock and 9 o'clock is biased in the direction of 3 o'clock,
The wrist band 12 is connected to the side where the position of the center of gravity is biased. Therefore, the device body 10 can be mounted on the arm in a stable state.

Furthermore, in the wrist-worn pulse wave measuring device 1 of this example, the emission wavelength range of the LED 31 is from 350 nm to 600 nm.
The photosensing wavelength region of the phototransistor 32 has a main sensitivity region of 300 nm to 600 nm.
In the range up to. On the other hand, the light receiving wavelength region when a unit in which an element and a filter are combined is used as the phototransistor 32 is in the range of 400 nm to 550 nm. Therefore, even if the pulse wave is measured in the simple light-shielded state shown in FIG. 1, of the light included in the outside light, the light in the wavelength region of 700 nm or less uses the finger as a light guide and the phototransistor 32 (light receiving unit). Since only light in the wavelength range that does not reach the point and does not affect detection passes through the finger as a light guide, in this example, even if external light hits the exposed portion of the finger, the pulse wave Since the influence of outside light does not affect the detection result of
It is possible to use the sensor unit 30 in which the sensor fixing band 40 having a narrow width shields the detection unit from light. Therefore, with the small sensor unit 30 as in this example, it is possible to hold the hand while being attached to the base of the finger, and there is no problem in running. Further, when the sensor unit 30 is attached to the base of the finger, the cable 20 can be short, so that the cable 20 does not become an obstacle during running. Therefore, the wrist-worn pulse wave measuring device 1 of this example is suitable for measuring the pulse rate during running.

When the distribution of the body temperature from the palm to the fingertip is measured, the temperature at the fingertip drops significantly when it is cold, while the temperature at the base of the finger does not drop relatively. That is, even in cold weather, blood flow does not significantly decrease at the base of the finger. Therefore, if the sensor unit 30 is attached to the base of the finger, the pulse rate and the like can be accurately measured even when running outdoors on a cold day.

Further, since the pulse wave information is obtained by using the light in the wavelength range from about 300 nm to about 700 nm, the S / N ratio of the pulse wave signal based on the blood volume change is high.

These reasons will be described below.

First, the reason why the influence of external light is small will be described with reference to FIG. FIG. 19A shows the relationship between the wavelength of light and the light transmittance of the skin. Here, a polygonal line a is a transmission characteristic of light having a wavelength of 200 nm, a polygonal line b is a transmission characteristic of light of a wavelength of 300 nm, a polygonal line c is a transmission characteristic of light having a wavelength of 500 nm, and a polygonal line d is a wavelength of 700 nm. The transmission characteristic of light, and the polygonal line e shows the transmission characteristic of light having a wavelength of 1 μm. As is clear from this figure, among the light included in the external light, the light having a wavelength range of 700 nm or less tends to hardly pass through the finger, and therefore the external light is not covered by the sensor fixing band 40. Even if the area is illuminated, the dotted line X
As shown by, does not reach the phototransistor 32 through the finger. Therefore, if light of 700 nm or less is used as the detection light as in this example, the influence of outside light can be suppressed by only covering the minimum necessary range without covering the finger with a large amount. The wrist-worn pulse wave measuring device 1 of the example can be used outdoors. Since light in the wavelength region lower than 300 nm is almost absorbed by the skin surface, the substantial light receiving wavelength region is 300 nm to 700 nm even if the light receiving wavelength region is 700 nm or less.

On the other hand, when an LED having an emission peak near 880 nm and a silicon-based phototransistor are used, the light receiving wavelength range thereof extends from 350 nm to 1200 nm as shown in FIG. Therefore, in the conventional optical system (detection device), of the external light, as shown by the arrow Y in FIG. 7, light having a wavelength of 1 μm that easily reaches the light receiving portion with the finger as a light guide, that is, Since the pulse wave is detected based on the detection result by the light indicated by the broken line e in FIG. 19A, erroneous detection due to the fluctuation of the external light is likely to occur.

Next, the reason why the S / N ratio of the pulse wave signal in the wrist-worn pulse wave measuring apparatus 1 of this example is high will be described with reference to FIG. 19 (b). FIG. 19B is an explanatory diagram showing the relationship between the wavelength of light and the light absorption characteristics of various hemoglobins.

In FIG. 19B, the absorption characteristic of hemoglobin not bound to oxygen is shown by the curve Hb, and the absorption characteristic of hemoglobin bound to oxygen is shown by the curve HbO2. As shown by these curves, hemoglobin in blood has a large absorption coefficient for light with a wavelength of 300 nm to 700 nm, and the wavelength of conventional detection light is 88.
It is several times to about 100 times greater than the extinction coefficient for 0 nm light. Therefore, as in this example, the wavelength region (300
When the light of (nm to 700 nm) is used as the detection light, the detected value changes sensitively to the change in blood volume, and thus the detection rate (S / N ratio) of the pulse wave based on the change in blood volume is high.

As the optical unit, as shown in FIG. 21, a GaP LED having a main light emitting region in the range of 540 nm to 570 nm, and a light receiving sensitivity characteristic as shown in FIG. You may use the GaP type phototransistor which has a sensitivity region in the range of.

[0090]

As described above, in the arm mounting type portable device (arm mounting type pulse wave measuring device) according to the present invention, a laterally long body case is used for the device body, and the body case is Since the wristband is connected at a position biased toward the 3 o'clock side, the device body has a structure in which the wristwatch projects in the 9 o'clock direction when viewed from the wristband. There is no protruding part. Therefore,
According to the present invention, when the wrist-worn portable device is worn on the left hand, the wrist can be freely bent in spite of the use of the horizontally long body case, and the wearing feeling is good. Moreover, since there is no large overhanging portion in the 3 o'clock direction, the back of the hand does not hit the body case even when it falls.

Utilizing the use of the horizontally long main body case, when the battery and the piezoelectric element are arranged in a plane in the directions of 3 o'clock and 9 o'clock in the wristwatch, the device main body can be made thin. it can. Further, since the battery and the piezoelectric element are arranged in a plane, the battery can be easily replaced by the user by providing the battery cover on the back surface of the apparatus body.

When the barycentric position in the direction of 3 o'clock and 9 o'clock in the wristwatch is deviated in the direction of 3 o'clock, the wrist band is connected to the side in which the barycentric position is deviated. Therefore, the main body of the apparatus can be stably attached to the arm.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a usage state of an arm-mounted pulse wave measuring device according to an embodiment of the present invention.

FIG. 2 is a plan view of a device body of the wrist-worn pulse wave measuring device shown in FIG.

FIG. 3 is a bottom view of the device body of the wrist-worn pulse wave measuring device shown in FIG.

FIG. 4 is an explanatory view of the device body of the wrist-worn pulse wave measuring device shown in FIG. 1 when viewed from the 6 o'clock direction of the wristwatch.

5 is an explanatory view of the device body of the wrist-worn pulse wave measuring device shown in FIG. 1 when viewed from the direction of the wristwatch at 3 o'clock.

6A is a plan view of an optical unit of a sensor unit used in the wrist-worn pulse wave measuring device shown in FIG. 1, FIG.
Is a plan view showing a state where the sensor fixing band of the sensor unit used in this wrist-worn pulse wave measuring device is expanded,
(C) is an explanatory view showing the structure of another sensor unit.

FIG. 7 is an explanatory diagram showing a state in which the sensor unit is worn on a finger in the arm-mounted pulse wave measuring device shown in FIG.

8 shows In used in the wrist-worn pulse wave measuring device shown in FIG.
It is explanatory drawing which shows the emission spectrum of GaN-type blue LED.

FIG. 9 shows In used in the wrist-worn pulse wave measuring device shown in FIG.
It is explanatory drawing which shows the light receiving characteristic of a GaP type | mold phototransistor.

10 is an explanatory diagram showing a light receiving characteristic of a phototransistor unit with a filter used in the wrist-worn pulse wave measuring device shown in FIG.

11 is a block diagram showing a function of a data processing circuit of the wrist-worn pulse wave measuring device shown in FIG.

FIG. 12 is an enlarged view of the connector portion of the wrist-worn pulse wave measuring device shown in FIG. 1 when viewed from the 3 o'clock direction of the wristwatch.

13 is an explanatory diagram showing an electrical connection relationship in a connector portion of the wrist-worn pulse wave measuring device shown in FIG.

14 is an explanatory view showing the structure of a connector piece used in the connector means shown in FIG.

15 is an explanatory view showing the structure of a connector portion used in the connector means shown in FIG.

16 is a cross-sectional view showing a state in which the connector piece shown in FIG. 14 is attached to the connector portion shown in FIG.

FIG. 17 is a plan view showing the arrangement of electrodes in the connector piece shown in FIG.

18 is a diagram showing the wrist-worn pulse wave measuring device shown in FIG.
It is explanatory drawing which shows the structure of the connector cover which covers a connector part instead of a connector piece.

19 (a) is a graph showing the relationship between the wavelength of light and the light transmittance of the skin, and FIG. 19 (b) is an explanatory view showing the relationship between the wavelength of light and the absorption characteristics of various hemoglobins. .

FIG. 20 is an explanatory diagram showing light receiving characteristics of a silicon-based phototransistor used in a conventional wrist-worn pulse wave measuring device.

FIG. 21 is a graph of G used in the wrist-worn pulse wave measuring device shown in FIG.
It is explanatory drawing which shows the emission spectrum of aP type LED.

22 is a graph of G used in the wrist-worn pulse wave measuring device shown in FIG.
It is explanatory drawing which shows the light receiving characteristic of an aAsP type | mold phototransistor.

[Explanation of symbols]

1 ... Arm-worn pulse wave measuring device 10 ... Device body 11 ... Watch case (body case) 12 ... Wristband 13 ... Liquid crystal display device 20 ... Cable 31 ... LED (Light emitting part) 32 ... Phototransistor (light receiving part) 40 ... Sensor fixing band 58 ... Piezoelectric element 59 ... Battery 70 ... Connector part 80 ... Connector member (connector piece) 101・ ・ ・ Overhanging portion of the device body in the 9 o'clock direction 300 ・ ・ ・ Optical unit C ・ ・ ・ Center position of the device body in the 3 o'clock and 9 o'clock direction G ・ ・ ・ Device body 3 o'clock and 9 o'clock Center of gravity in the direction of

Claims (4)

[Claims] 1. A wrist-worn portable device having a device body including a display unit for displaying various information, and a wristband for wearing the device body on an arm, wherein the device body is a wristwatch. A laterally elongated main body case whose length dimension in the directions of 3 o'clock and 9 o'clock is longer than the length dimension in the direction of 6 o'clock and 12 o'clock; and the wrist band, in the 3 o'clock and 9 o'clock directions of the body case. The wrist-worn portable device, wherein the wrist-worn portable device is connected to the main body case at a position deviated from the center position in 3 o'clock direction. 2. The apparatus main body according to claim 1, wherein the apparatus main body includes a flat battery and a flat piezoelectric element in the main body case, and the piezoelectric element and the battery are provided in the main body case at 3 o'clock in a wristwatch. And a wrist-worn portable device, which is arranged in a plane at 9 o'clock. 3. The device body according to claim 1, wherein the center of gravity of the wristwatch in the 3 o'clock and 9 o'clock directions is deviated in the 3 o'clock direction from the center position in this direction. A wrist-worn mobile device. 4. An arm-mounted pulse wave measuring device comprising an arm-mounted portable device defined in any one of claims 1 to 3 and capable of displaying pulse wave information such as a pulse rate on the display section. A sensor unit in which the light emitting portion and the light receiving portion are directed toward the finger surface, a cable extending from the sensor unit for inputting the light receiving result of the light receiving portion to the device body, A wrist-mounted pulse wave measuring device, comprising: a data processing circuit which is built-in and which obtains pulse wave information to be displayed on the display unit based on a light reception result of the light receiving unit.