JP3349620B2 - Connector structure and arm-mounted pulse wave measuring device having the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector structure such as an arm-mounted pulse wave measuring device for displaying pulse wave information such as a pulse rate based on a signal input from an external sensor.

[0002]

2. Description of the Related Art As a wrist-worn portable device capable of displaying various information, a device which optically detects a change in blood volume and displays pulse wave information such as a pulse rate based on the detection result. is there. In such an optical pulse wave measuring device, 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 the finger or the like (blood vessel) out of the light emitted from the LED. By receiving the light reflected from the phototransistor with a phototransistor, a change in blood volume is detected as a change in the amount of received light, and a pulse rate or the like is displayed based on the detection result. For this reason, between the device body and the sensor unit,
Signals are input and output through a connector portion composed of a connector portion of the device main body and a connector member formed at a distal end portion of a cable extending from the sensor unit.

[0003] Such a connector generally has a structure in which a terminal group is held by a resin exterior member on either side of the connector portion and the connector member, and the connector member is mounted so as to cover the connector portion. When you do
Terminal groups formed on the upper surface of the connector and the lower surface of the connector member are electrically connected to each other.

[0004]

However, in the conventional connector, when the connector member is mounted so as to cover the connector portion, the upper surface portion of the connector portion and the lower surface portion of the connector member face each other via a narrow gap. Therefore, when this portion comes into contact with water, there is a problem that the water penetrates deep into the gap due to capillary action, and the terminals are short-circuited. Moreover, the water that entered this way
Since the connector portion does not come out of the gap when it is shaken, there is a problem that the connector member cannot be recovered from the short-circuit state unless the connector member is detached from the cocker portion and water is carefully wiped off each time.

[0005] In view of the above problems, an object of the present invention is to provide:
Provided is a connector structure in which a short circuit between terminals is unlikely to occur even when water enters a connector portion and which can be easily restored even when a short circuit occurs, and an arm-mounted pulse wave measuring device including the same. It is in.

[0006]

In order to solve the above-mentioned problems, according to an embodiment of the present invention, a connector portion having a first terminal group and a connector mounted on the connector portion so as to cover the connector portion are provided. A connector member having a second terminal group that is electrically connected to the first terminal group, and the connector member and the connector portion are partially engaged with each other to form the connector member on the connector portion. In the connector structure having an engagement mechanism for holding the mounted state, the contact angle of water in the terminal surrounding area surrounding the position where the terminal group is formed on both surfaces of the connector portion and the connector member facing each other. The contact angle is larger than the contact angle of water in the peripheral region of the terminal peripheral region.

[0007]

Here, the difference between the contact angle of water in the region around the terminal and the contact angle of water in the region around the region around the terminal is preferably about 50 ° or more.

In such a connector structure, it is preferable that a water repellent treatment is applied to a region around the terminal while a hydrophilic treatment is applied to a peripheral region.

In still another embodiment of the present invention, a connector portion provided with a first terminal group, and the first terminal group is electrically connected to the first terminal group when mounted on the connector portion so as to cover the connector portion. A connector member provided with a second terminal group to be electrically connected; an engagement mechanism for partially engaging the connector member with the connector portion to maintain a state in which the connector member is mounted on the connector portion; In the connector structure having, when evaluated in a state where fats and oils are attached, the contact angle of water in the terminal surrounding area surrounding the formation position of the terminal group, on both surfaces of the connector portion and the connector member facing each other, It is characterized in that it is larger than the contact angle of water in the peripheral region of the terminal surrounding region.

[0011]

In order to cause the above-mentioned difference in the contact angle of water in a state in which the fats and oils are attached, for example, a region around the terminal is constituted by a smooth surface, and a peripheral region of the region around the terminal is formed by a rough surface. Constitute.

In the engagement mechanism of the connector structure according to the present invention, the connector member is engaged when the connector member is slid on the connector portion to maintain a state in which the connector member is mounted on the connector portion. When the engagement state is released when the connector member is slid in the opposite direction, the first terminal group is arranged in a plurality of rows along the sliding direction of the connector member, and the first terminal group is disposed between the terminals. The position is formed so as to be shifted in a direction orthogonal to the sliding direction at the position of the first terminal group, and the second terminal group also has a position between the terminals in the sliding direction of the connector member corresponding to the formation position of the first terminal group. Preferably, it is formed so as to be shifted in a direction perpendicular to the direction.

Such a connector structure includes, for example, a sensor unit in which the light emitting unit and the light receiving unit are directed toward the finger surface, and a display for displaying pulse wave information obtained based on the light receiving result of the light receiving unit. And a device main body having a connector portion at an end, a wristband for attaching the device main body to an arm, and a connector member extending from the sensor unit and having a distal end portion formed with a connector member. The present invention can be used for an arm-mounted pulse wave measuring device provided with a cable capable of inputting a light receiving result of a light receiving unit to a device main body via a terminal group when the device is mounted on the pulse wave measuring device.

In this wrist-worn pulse wave measuring device, when the connector member is mounted on the connector portion, at least a portion of the first terminal group to which a signal is input from at least the sensor unit via the cable. Measures the potential of the terminal, detects whether this terminal and the terminal for applying drive voltage to the sensor unit via a cable are in a short state, and displays the detection result on the display unit. Preferably, means are provided.

[0016]

In the connector structure of the present invention, when the connector member is mounted so as to cover the connector portion, the terminal groups are electrically connected to each other, and the upper surface of the connector portion and the lower surface of the connector member have a narrow gap. To face each other. When such a connector portion comes into contact with water, the water penetrates deep into the gap by capillary action. Here, in the connector structure of the present invention, the contact angle of water in the region around the terminal surrounding the formation position of the terminal group is larger than the contact angle of water in the peripheral region.

That is, based on the diameter and height of a water drop when the water drop is dropped on a material, the following equation ＝= 2 tan ⁻¹ · (h / r)）: contact angle h: height of water drop r : The contact angle 得 obtained from the radius of a water droplet is equivalent to the angle between the liquid on the material and the material surface, and is a measure of the wettability (hydrophilicity) and water repellency (hydrophobicity) of the liquid. Therefore, in the present invention, comparing the terminal peripheral region and its peripheral region, the terminal peripheral region has water repellency, while the peripheral region has hydrophilicity. For this reason, even if water enters the gap between the connector portion and the connector member, water near the terminal is repelled from the terminal surrounding region and drawn to the peripheral region. Therefore, no short circuit occurs between the terminals. Further, even if the short-circuit state occurs temporarily, the operation of swinging the connector portion easily returns from the short-circuit state.

The occurrence of a short circuit can be more reliably prevented when the contact angle of water in the region around the terminal is larger than the contact angle of water in the peripheral region of both the connector portion and the opposing surface of the connector member. With
Easy to recover from short-circuit.

Rather than modifying the material constituting the connector portion or the connector member for only one of the terminal peripheral region and the peripheral region, the terminal peripheral region is subjected to a water-repellent treatment,
By performing the hydrophilic treatment on the peripheral regions, the difference in the contact angle of water between these regions can be increased.

In the present invention, the contact angle of water between the terminal surrounding area and the peripheral area is not the initial state, and the contact angle of water may be different in a state where oil or fat adheres. That is, since the connector portion and the connector member are handled by hand, when they are touched and greased (fingerprints), the contact angle of water in the region around the terminal is compared with the contact angle of water in the peripheral region. When it is large, the occurrence of a short circuit can be more reliably prevented, and it is easy to return from the short state.

When the difference in the contact angles is determined by using the presence or absence of unevenness, it is only necessary to process the connector portion and the mold for forming the connector piece.

In the present invention, when the first and second terminal groups are arranged so as to be shifted in a direction perpendicular to the sliding direction, the terminals can be formed at positions as far apart as possible, so that water can enter. Short circuit is unlikely to occur.

When such a connector structure is provided in an arm-mounted pulse wave measuring apparatus, a short circuit between the terminals is unlikely to occur even if it is rained, and even if the terminal is temporarily short-circuited, the arm can be swung. Since it recovers from a short state by a simple operation, it is suitable for measuring a pulse wave during running outdoors.

When a short-circuit detecting means is provided in the arm-mounted pulse wave measuring apparatus, it is possible to immediately determine that the current trouble is caused by the short-circuit. Is performed early, and the normal state can be quickly restored.

[0025]

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

Embodiment 1 (Overall Configuration) FIG. 1 is an explanatory view showing a use state of an arm-mounted pulse wave measuring apparatus of the present embodiment. In the description of the present example, the time direction in the wristwatch means only the direction of the apparatus main body, and does not mean that the display on the apparatus main body is a pointer type.

In FIG. 1, an arm-mounted pulse wave measuring apparatus 1 (arm-mounted portable device) of the present embodiment includes an apparatus main body 10 (apparatus main body) having a wristwatch structure, and a cable 20 connected to the apparatus main body 10. And a sensor unit 30 provided on the distal end side of the cable 20. The device main body 10 is provided with a wristband 12 which is wound around the wrist from the 12 o'clock direction of the wristwatch 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 Apparatus Main Body) FIG. 2 is a plan view showing the apparatus main body of the wrist-mounted pulse wave measuring apparatus of the present embodiment with a wristband, a cable, and the like removed, and FIG. FIG. 4 is a bottom view, FIG. 4 is an explanatory diagram of the main body of the wristwatch as viewed from 6:00, and FIG. 5 is an explanatory diagram of the main body of the wristwatch as viewed at 3:00.

In FIG. 2, the apparatus main body 10 includes a watch case 11 (main body case) made of resin. On the front side of the watch case 11, in addition to the current time and date, a pulse rate such as a pulse rate is provided. A liquid crystal display device 13 (display unit) for digitally displaying wave information and the like is configured. A data processing circuit 5 that performs signal processing on a detection signal and the like in order to display a change in pulse rate based on a detection result (pulse wave signal) by the sensor unit 30 is provided inside the watch case 11.
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 provided with a clock circuit, the information display means 60 can display the normal time, the lap time, the split time, and the like on the liquid crystal display device 13.

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

In the wrist-mounted pulse wave measuring device 1, it is necessary to increase the size of the device main body 10 as its function is increased. The device body 10 cannot be enlarged in the direction of 6 o'clock and 12 o'clock in a wristwatch. Therefore, as shown in FIG. 2, a horizontally long watch case 11 whose length in the directions of 3 o'clock and 9 o'clock is longer than the length in the directions of 6 o'clock and 12 o'clock is used for the main body 10 of the device. .

The wristband 12 is connected to the watch case 11 at a position deviated toward the 3 o'clock direction 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 main body 10 has a large overhang 101 in the direction of 9 o'clock in the wristwatch, but such a large overhang is not in the direction of 3 o'clock. Therefore, the wearing feeling is good, for example, the wrist can be bent freely instead of using the horizontally long watch case 11. Moreover, since there is no large overhang in the direction of 3 o'clock, the back of the hand does not hit the watch case 11 even if it falls. Also, a large overhanging part 1 located at 9 o'clock
Since 01 is supported in close contact with the arm surface on the elbow side, the arm-mounted pulse wave measuring device 1 is in a stable state. Therefore, even if the horizontally long watch case 11 is used, there is no need to use an unnecessarily wide wristband 12.

In FIGS. 3 and 4, a flat battery 59 as a power source and a flat piezoelectric element 58 for a buzzer are provided inside the watch case 11 by utilizing the fact that it is horizontally long.
Are arranged side by side in the plane direction, so that the apparatus body 10
And the battery 59 can be replaced by the user himself by removing the battery cover 118.
Among these electronic components, the relatively heavy battery 59 is disposed at a position deviated in the direction of 3 o'clock with respect to the center position C. On the other hand, the relatively light piezoelectric element 58 is arranged at a position deviated in the direction of 9 o'clock with respect to the center position C. For this reason, the center of gravity G in the direction of 3 o'clock and 9 o'clock of the apparatus main body 10 is located at a position deviated in the direction of 3 o'clock with respect to the center position C. Since the connection is established, the apparatus main body 10 can be mounted on the arm in a stable state.

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

(Structure for Preventing Rotation of Apparatus Body) Referring to FIG. 5, in the direction of 12 o'clock on the outer peripheral portion of the watch case 11, a stop shaft 121 attached to the end of the wrist band 12 is held. A connecting portion 105 is formed. On the other hand, the wristband 12 wound around the arm is folded back at an intermediate position in the length direction in the direction of 6 o'clock in the outer peripheral portion of the watch case 11.
The receiving part 106 to which the fastener 122 for holding the intermediate position of the second part 2 is attached is formed.

In the 6 o'clock direction of the apparatus main body 10, a flat back surface portion 119 on which the battery cover 118 and the like are attached is provided.
The portion from the edge of the to the receiving portion 106 is formed integrally with the watch case 11 to form a rotation stopping portion 108 which forms an angle of about 115 ° with the back surface portion 119. Accordingly, when the wristband 12 is used to mount the wristband 12 on the wristband 12 so that the main body 10 of the wristband L (arm) is positioned on the upper surface portion L1 (the back of the hand), the watch case 11 is mounted.
Of the wrist L is in close contact with the upper surface L1 of the wrist L, while the rotation stopper 108 is provided on the side L2 of the arm on the side of the radius R.
Is in contact with. In this state, the back part 119 of the apparatus main body 10 feels like straddling the radius R of the arm and the ulna U through the skin, while the bent part 109 between the rotation stop part 108 and the back part 119 is exposed through the skin. It feels like it abuts the radius R of the arm.

As described above, the rotation stopper 108 and the back surface 1
19 forms an anatomically ideal angle of about 115 °, so that the apparatus main body 10 is moved in the direction of arrow A from the state shown in FIG. Even when the user tries to turn the rotation from the near side to the other side, the rotation stopping portion 108 remains in contact with the side surface portion L2 of the wrist L and does not further shift. Conversely, even if the user attempts to turn the device body 10 in the direction of arrow B, that is, to rotate the device body 10 forward around the wrist L, the back surface portion 119 of the device body 10 contacts the upper surface portion L1 of the wrist L. There is no further shift in the state. In addition, since the apparatus main body 10 is not completely in close contact with the periphery of the wrist L and has an appropriate gap between the apparatus main body 10 and the surface of the wrist L, even if the rotation stopper 108 is provided, the wearing feeling may be impaired. There is no. Further, the rotation is restricted only at two places on one side around the arm by the back surface portion 119 and the rotation stopping portion 108. For this reason, even if the arm is thin, the back portion 119
In addition, since the rotation stopping portion 108 is securely in contact with the arm, the rotation stopping effect can be surely obtained, but the arm does not feel cramped even if it is thick.

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 °, it can be confirmed that the apparatus main body 10 can be prevented from rotating around the arm. I have. In addition, the arm-mounted pulse wave measuring device 1 may be mounted so that the device main body 10 is positioned on the lower surface portion L3 (the palm side) of the wrist L. In this case, the rotation stopping portion of the device main body 10 is used. 108 comes into contact with the side surface portion L4 on the side of the ulna U of the arm. 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.
FIG. 6B is a plan view of an optical unit of the sensor unit used in the arm-mounted pulse wave measuring device of the present embodiment, and FIG. 6B shows a developed sensor fixing band of the sensor unit used in the arm-mounted 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 where the sensor unit is attached to the base of a finger.

Referring again to FIG.
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. From a round and round state, after spreading it and wrapping it around the base of the finger, releasing the hand as it is, Due to its own shape restoring force, it is wound around the base of the finger.

The substantially central portion of the sensor fixing band 40 is
In addition to being thicker, there is formed a hole 41 in which the optical unit 300 can be stored.

In FIG. 6A, the optical unit 300
The optical unit 30 is provided with a resin in a rectangular shape having a pair of protrusions 311 and 312 on both sides.
The cable 20 is drawn out from the inside of the cable 0.

On the other hand, in FIG. 6 (b), the hole 41 of the sensor fixing band 40 has a shape and a size that allow the optical unit 300 to be fitted therein, and when the optical unit 300 is fitted therein. , The projection 311,
Concave portions 411 and 412 into which 312 fits are formed to prevent falling off. Note that the sensor fixing band 40 is formed with four constricted portions 410 at four locations so that the band can be easily worn on a finger.

Regarding the sensor unit 30, the width of the sensor fixing band 40 does not matter even if the width of the sensor fixing band 40 is about 20 mm from the viewpoint that the hand can be grasped lightly even when worn on the base of the finger. In addition, as shown in FIG. 6C, a structure may be used in which only the width of a portion of the sensor fixing band 40 to which the optical unit 300 is attached is slightly wider.

In FIG. 7, in the optical unit 300,
A back cover 302 is put on a sensor frame 301 as a case body, and the inside thereof is 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 their light emitting surface and light receiving surface facing the glass plate 304, respectively.

In this example, the LED 31 is InGaN
System (indium-gallium-nitrogen system) using a blue LED, the emission spectrum of which is shown in FIG.
It has an emission peak at 450 nm, and its emission wavelength range is
It is in the range from 350 nm to 600 nm. In this example, a GaAsP-based (gallium-arsenic-phosphorus-based) phototransistor is used as the phototransistor 32 corresponding to the LED 31 having such light emission characteristics.
As shown in FIG. 9, the light receiving wavelength region of the element itself has a main sensitivity region in a range from 300 nm to 600 nm, and there is a sensitivity region even at 300 nm or less. Here, a sensor unit in which a filter is added to an element may be used as the phototransistor 32, and an example of a light receiving wavelength region of such a sensor unit is, as shown in FIG. 10, a main sensitivity region from 400 nm to 550 nm. In the range. Since the power consumption of the LED 31 and the phototransistor 32 is relatively small, even when the timekeeping function and the pulse wave measurement function are driven by one small battery as in the arm-mounted pulse wave measurement device 1 of this example, Long continuous operation time.

Incidentally, as shown in FIG.
00 is the glass plate 30 with respect to the sensor fixing band 40.
When the sensor fixing band 40 is attached to the base of the finger, the LED 31
The phototransistor 32 and the phototransistor 32 are in a state where the respective light emitting surface and light receiving surface face the surface of the finger. Therefore, L
When light is emitted from the ED 31 toward the finger, the living body (blood vessel)
The light reflected from the phototransistor 32 is received by the phototransistor 32, and the light reception result (pulse wave signal) is transmitted to the optical unit 300.
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.

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

(Structure of Connector Portion) FIG. 12 is an enlarged view of the wristwatch when the connector piece is mounted on the connector portion as viewed from the direction of 3 o'clock, and FIG. 13 is an electrode portion of the sensor circuit on the connector piece side. FIG. 3 is an explanatory diagram showing a combination of terminals on a connector unit side for inputting and outputting signals from the sensor circuit.

In FIG. 12, a connector portion 70 is formed on the front side of a portion of the end portion of the apparatus main body 10 which is extended as a rotation stopping portion 108 in the direction of 6:00, and a connector portion 70 is provided therein. The connector piece 80 (connector member) formed at the end of the connector 20 can be mounted. Therefore, the sensor unit 30 and the cable 2
If 0 is removed from the apparatus main body 10, it can be used as a normal wristwatch, which is convenient. Also, the connector section 7
Since “0” is formed on the surface of the portion corresponding to the rotation stopper 108, the part extended to provide the rotation stopper 108 can be used as the connector 70 as it is. Moreover, since the connector 70 is located in the direction of 6:00, when the apparatus main body 10 is mounted on the wrist, the connector 70 is located on the near side as viewed from the user, and the operation is simple. Further, since the connector section 70 does not protrude from the apparatus main body 10 in the direction of 3 o'clock, the user can freely move the wrist during the running, and even if the user falls during the running, the back of the hand is connected to the connector. It does not hit the part 70.

The electrical connection made in the connector section 70 and the connector piece 80 (connector means) is as shown in FIG.

In FIG. 13, terminals 751 to 756 are connected to a connector 70 formed on the side of the apparatus main body 10.
(First terminal group), and these terminals 75
Corresponding to 1 to 756, electrode portions 831 to 836 (second terminal group) are formed in connector piece 80.
The terminal 752 is connected to the LED 31 via the
Terminal, terminal 7 for supplying the drive voltage VDD of
A terminal 53 is a terminal for supplying a constant voltage VREG for driving to the collector terminal of the phototransistor 32 via the electrode portion 834, a terminal 751 is a terminal to be set to the negative potential of the LED 31 via the electrode portion 833, and a terminal 751. Is 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 for detecting whether or not the connector piece 80 is attached to the connector portion 70 via the electrode portion 835. Is a terminal to which the signal is input. The electrode portion 836 is grounded to the human body in the sensor unit 30, and the terminal 756 and the electrode portion 83
6 are electrically connected, VDD is used as a ground line to shield the electrode portions 831 to 836.

In the connector piece 80, a first capacitor C1 and a first switch SW1 are interposed between the terminals of the LED 31 (between the electrode portions 832 and 833). This switch SW1 is closed when the connector piece 80 is removed from the connector section 70, and
A first capacitor C1 is connected in parallel to D31,
The connector piece 80 is opened when the connector piece 80 is mounted on the connector portion 70. Similarly, a second capacitor C2 and a second switch SW2 are interposed between the terminals (electrode portions 831 and 834) of the phototransistor 32. The switch SW2 is closed when the connector piece 80 is detached from the connector section 70, connects the second capacitor C2 to the phototransistor 32 in parallel, and attaches the connector piece 80 to the connector section 70. To open state.

Further, in order to detect whether or not water has penetrated into gaps between the connector pieces 80 in a state where the connector pieces 80 are attached to the connector portions 70 and short-circuited between the terminals and between the electrode portions, the apparatus body 10 In the data processing circuit 50, when the mode is switched to the pulse wave measurement mode using the LED 31 and the phototransistor 32 by the sensor drive signal, the signals from the terminals 753 and 751 (signal input terminals from the LED 31 and the phototransistor 32) / D converter 57 (pulse wave signal converter 5
Terminals 753 and 75 based on signals sequentially input to 1)
1, the terminal 753 (electrode unit 833) and the terminal 752 (electrode unit 832) for applying the second drive voltage VDD to the LED 31 are in a short-circuit state based on the detected potential level. Terminal 751 (electrode part 831)
It can be detected whether or not the terminal 754 (electrode portion 834) for applying the constant voltage VREG to the phototransistor 32 is in a short-circuit state. Further, the apparatus main body 10 displays such a detection result on the liquid crystal display device 13. Thus, in this example, the short-circuit detecting means for monitoring the presence or absence of a short-circuit between terminals and between electrode portions is configured.

(Structure of Connector Piece) Connector 70
The structure of the connector piece 80 will be described in detail with reference to FIGS.

FIG. 14 is an enlarged view showing the structure of a connector piece formed at the end of the cable, FIG. 15 is an enlarged view of a connector part on the apparatus main body side, and FIG. FIG. 17 is a vertical cross-sectional view showing the state of the connection, 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, a pair of protrusions 81 and 82 projecting downward on both sides of the lower surface 801 of the connector piece 80 are formed. At the lower ends of these projections 81, 82, four engagement pieces 811, 812, 821, 822 (second engagement projections) project toward the inside.

On the lower surface 801 of the connector piece 80, two operating pins 837 and 838 for switching a circuit for preventing the influence of static electricity when the cable 20 is connected to the apparatus main body 10 are formed. . When the connector piece 80 is detached from the connector section 70, the operating pins 837 and 838 are in such a state that the tips protrude from the lower face 801 of the connector piece 80.

(Structure of the electrode part forming surface of the connector piece)
Six electrode portions 831, 832, 833, 834, 835, 836 (second terminal group) are formed on the lower surface portion 801 of the connector piece 80, and annular convex ridges 841, 842 are formed around the electrode portions 831, 832, 833, 834, 835, 836. , 843, 844, 845, 846
Is formed. Here, when the connector piece 80 is mounted on the connector section 70, as described later, the connector piece 80 is laid over the connector section 70, and then the connector piece 80 is slid in the direction of arrow Q. Along the direction of arrow Q).
Reference numeral 836 denotes an electrode portion 831, 832, 833 and an electrode portion 8.
34, 835, and 836. In each row, each of the electrode portions 831 to 836 is displaced in a direction orthogonal to the sliding direction of the connector piece 80 (the direction of the arrow Q) and arranged obliquely.

Here, the lower surface 80 of the connector piece 80
1, a terminal surrounding region 802 surrounding the formation positions of the electrode portions 831, 832, 833, and the electrode portions 834, 8
Terminal surrounding area 802 surrounding the formation positions of 35 and 836
Is subjected to a water-repellent treatment so that the contact angle of water is about 85 ° or more. On the other hand, the peripheral area 803 of the terminal surrounding area 802 is subjected to a hydrophilic treatment so that the contact angle of water is about 75 ° or less, preferably about 35 ° or less.

As such a hydrophilizing treatment, a method of attaching a hydrophilic sheet containing a surfactant, a connector piece 8
For example, there is a method of performing a plasma treatment on the surface of the resin constituting the resin itself. On the other hand, as the water repellent treatment, a method of applying a fluorine-based coating agent, a method of applying a paint,
There is a method of attaching a water-repellent tape. Further, from the viewpoint of increasing the contact angle of water in the terminal surrounding region 802 compared to the contact angle of water in the peripheral region 803, the connector piece 80 itself is made of a resin having a relatively high water repellency, There is also a method of performing only the hydrophilic treatment on the peripheral region 803. Conversely, the connector piece 8 is made of a hydrophilicized ABS resin obtained by graft-polymerizing a hydrophilic monomer such as an acrylic monomer onto the ABS resin surface.
In addition, there is also a method of performing a water-repellent treatment on the terminal surrounding region 802 while configuring 0.

Here, the polycarbonate resin material constituting the connector portion 70 and the connector piece 80, the contact angles (measured values and their average values) when the respective methods for water repellency and hydrophilicity are taken, and the Table 1 shows the results of comparing the contact angles (measured values and their average values) after fingerprint attachment, which means durability. The state in which the fingerprint is attached is reproduced by attaching the fat (glycerin ester of fatty acid).

[0063]

[Table 1]

As shown in Table 1, the contact angle changes depending on various treatments. Among the water-repellent treatments, when coated with CYTOP (trade name, manufactured by Asahi Glass Co., Ltd.), the durability when scratched is improved. Especially excellent in terms of surface. Further, among the respective hydrophilic treatments, the hydrophilic treated ABS resin obtained by graft-polymerizing a hydrophilic monomer such as an acrylic resin onto the ABS resin surface is particularly excellent in abrasion resistance.

(Configuration of Connector Portion) As shown in FIG. 15, the connector portion 70 is formed with engaging portions 71, 72, 73, and 74 (first engaging projections) projecting outward. . Therefore, the projecting portions 81 and 82 of the connector piece 80 are engaged with the engaging portions 71 and 7 of the connector portion 70.
2, 73, 74, between the engaging portion 71 and the engaging portion 72, and between the engaging portion 73 and the engaging portion 74, the engaging piece 811 of the connector piece 80, After the connector piece 80 is put on the connector part 70 so that the connector part 821 is located, the engaging pieces 811 and 821 are
2 and the connector piece 80 is pushed toward the connector part 70 so as to pass through between the engagement part 73 and the engagement part 74 (the first part for attaching the connector piece 80 to the connector part 70). Operation), and then
When the connector piece 80 is slid in the direction of the arrow Q (the mounting direction of the connector piece 80, the direction from 6 o'clock to 12 o'clock of the apparatus main body 10) (the second for attaching the connector piece 80 to the connector section 70). Operation), engaging portion 7
The engagement pieces 811 and 821 are sunk under the first and the third 73. In addition, the engagement pieces 812 and 822 go under the engagement portions 72 and 74. As a result, the engagement pieces 811, 821, 812, 8
22 is in a state of holding the engaging portions 71, 72, 73, 74 respectively with the lower surface portion 801 of the connector piece 80, and the connector piece 80 is easily and securely attached to the connector portion 70. You.

(Structure of Terminal Configuration Surface of Connector Portion) Like the electrode portions 831 to 836, each of the terminals 751 to 756 has terminals 751, 752, 753 along the sliding direction of the connector piece 80 (direction of arrow Q). And terminals 754 and 75
5 and 756 are formed in two rows. In each row, the terminals 751 to 756 are connected to the electrode portions 831 to 83.
6, the sliding direction of the connector piece 80 (arrow Q)
Is obliquely arranged so as to be shifted in a direction orthogonal to (i. Therefore, when the connector piece 80 is attached to the connector section 70, the six terminals 751 to 756 are electrically connected to the six electrode sections 831 to 836, respectively, and the measurement result of the sensor unit 30 is transmitted to the cable 20.
Can be input to the apparatus main body 10 via the.

When the connector piece 80 is detached from the connector section 70, the connector piece 80 is slid in the direction of the arrow R in reverse. As a result, the engagement pieces 811, 821
Are provided between the engaging portion 71 and the engaging portion 72, and the engaging portion 73.
And return until it is located between Therefore, if the connector piece 80 is lifted as it is, the connector piece 80 can be easily and reliably detached from the connector portion 70.

As described above, the connector piece 80 is engaged when the connector piece 80 is slid in the direction of the arrow Q on the connector portion 70, and the connector piece 80 is slid in the opposite direction (the direction of the arrow R) from this state. An engagement mechanism 700 is configured to release the engagement state when the engagement is performed. The engagement mechanism having such a configuration ensures reliable engagement with a small number of components.

The connector piece 80 is connected to the connector section 7.
When the device is slid from 06:00 to 12 o'clock, the force applied to the device body 10 is reduced by the rotation stopper 10.
8, the direction in which the apparatus main body 10 is more difficult to rotate. Therefore, even when the connector piece 80 is mounted, the device main body 10 does not rotate around the wrist, so that the mounting is easy.

Here, in the upper surface portion 701 of the connector portion 70, the terminal surrounding region 702 surrounding the formation positions of the terminals 751 to 756 is subjected to a water-repellent treatment so that the contact angle of water becomes 85 ° or more. ing. On the other hand, the peripheral area 703 of the terminal surrounding area 702 has been subjected to a hydrophilic treatment so that the contact angle of water is about 75 ° or less, preferably about 35 ° or less.

As in the case of the connector piece 80, examples of the hydrophilic treatment include a method of attaching a hydrophilic sheet containing a surfactant and a method of performing a plasma treatment on the resin surface constituting the connector portion 70 itself. On the other hand, examples of the water-repellent treatment include a method of applying a fluorine-based coating agent, a method of applying a paint, and a method of attaching a water-repellent tape. Further, from the viewpoint of increasing the contact angle of water in the terminal surrounding region 702 compared with the contact angle of water in the peripheral region 703, the connector portion 70 itself is made of a resin having relatively high water repellency, There is also a method of performing only the hydrophilic treatment on the peripheral region 703. Conversely, a method in which the connector portion 70 is made of a hydrophilicized ABS resin obtained by graft-polymerizing a hydrophilic monomer such as an acrylic resin onto the ABS resin surface, and a water repellent treatment is performed on the terminal surrounding region 702. There is also.

(Structure of Stopper Mechanism) As can be seen from FIG. 15, the engaging portions 71 to 74 have vertical walls 711, 721, 731 and 741 on the side in the direction of arrow Q.
Is formed. Therefore, when the connector piece 80 is slid in the direction of the arrow Q when the connector piece 80 is mounted on the connector portion 70 (second operation), the engagement pieces 811, 812, 821, and 822 cause the vertical wall 711, 7
21, 731 and 741, respectively, and the connector piece 80 is stopped at the mounting position of the connector part 70. That is, the vertical walls 711, 721, 731 and 741 function as a first stopper for the connector piece 80.

On the contrary, the connector piece 80 is
When the connector pieces 811 and 821 are slid in the direction of arrow R in order to remove the connector pieces 811 and 821 from the vertical walls 721 and 741 of the engagement portions 72 and 74, respectively.
0 is stopped at the original position of the connector section 70. That is, the back side of the vertical walls 721 and 741 is connected to the connector piece 8.
Functions as a second stopper for zero.

(Structure of Terminals and Electrodes) Connector 7
0, the terminals 751 to 756 all have holes 761, 762, 763, 76 formed in the connector 70.
4, 765, and 766, and a cross section when cut at a position passing the formation positions of the terminals 753, 756, the operating pin 838, and the electrode portions 833, 836 is shown in FIG. .

In FIG. 16, the connector piece 80 is
It has a structure in which a cover member 806 is covered on an exterior case 805 capable of accommodating a circuit board 85 therein. In the lid member 806,
Holes 863 and 866 are formed, and annular ridges 843 and 846 are formed along the opening edge on the lower side. Electrodes 833, 836 are arranged inside the holes 863, 866, where the electrodes 833, 836
3,876. Electrodes 833, 8
36 is electrically connected to a circuit pattern of a circuit board 85 disposed inside the connector piece 80. Such an electrode structure is different from the electrode portions 83 other than the electrode portions 833 and 836.
1, 832, 834, and 835 are the same. The core wire of the cable 20 is also electrically connected to the circuit pattern of the circuit board 85 by soldering.

(Configuration of Click Mechanism) The connector section 70 has a structure in which a cover member 706 is covered on its concave portion.
Holes 763 and 766 are formed in the lid member 706. Inside these holes 763, 766, terminals 753,
Numeral 756 is arranged as an advance / retreat pin which can be advanced / retracted so that the tip is projected from the holes 763, 766. Flange 7 formed on the base side of each terminal 753, 756
Coils 83 and 786 are provided with coil springs 773 and 776, and the terminals 753 and 756 are urged by the coil springs 773 and 776 in a direction protruding from the holes 763 and 766. . However, Tsuba 78
Since the outside diameter of 3, 786 is larger than the inside diameter of holes 763, 766, terminals 753, 756 do not fall out of holes 763, 766. Such a terminal structure has a terminal 7
Terminals 761, 762, 764, 76 other than 63, 766
5 is also the same.

When the connector piece 80 is mounted on the connector part 70, the connector piece 80 is
The terminals 753 and 756 slide over the annular convex ridges 843 and 846 of the connector piece 80 while being urged by the coil springs 773 and 776 to securely connect to the electrodes 833 and 836. I do. In addition, 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 securely attached to the connector 70. Note that, in order to configure such a click mechanism, a terminal using an advancing / retracting pin may be provided on the connector piece 80 side, and a ridge portion may be provided on the connector section 70 side, contrary to the present example.

(Structure of Switch Mechanism) A hole 868 is formed in the lid member 806 of the connector piece 80, and an operation pin 838 is provided inside the hole 868.
Is arranged. This operating pin 838 has a hole 8
68 so that it can be advanced and retracted inside the hole 868 so as to protrude from the hole 68. A leaf spring switch spring 8 is provided for a flange 898 formed at the base of the operation pin 838.
8 are arranged. The switch spring 88 urges the operating pin 838 in a direction protruding from the hole 868 by its tip 885. However, the outer diameter of the collar 898 is
Since it is larger than the inner diameter of the hole 868, the actuation pin 838
It does not fall out of the hole 868. Switch spring 88
The base is fixed to the upper end surface of the electrode portion 833 by a screw 881, and is electrically connected to the electrode portion 833.

In FIG. 17, the tip 885 of the switch spring 88 has a contact portion 8 which is in contact with the base of the operating pin 838.
86 and a contact 887 formed at 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, when the connector piece 80 is not mounted on the connector portion 70, the operating pin 838 is pushed by the switch spring 88 and the tip protrudes from the hole 868 as shown by a solid line in FIG. 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 closed in conjunction with the movement of the operation pin 838 indicated by the arrow.
Is in a state of being electrically connected to the LED 31 in parallel. Therefore, even if a substance having a high potential due to static electricity touches the electrode portions 832 and 833, the 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 mounted on the connector portion 70, the operating pin 838 moves in the direction of being retracted into the hole 868 as shown by a two-dot chain line in FIG. Is deformed as shown by a two-dot chain line. When the switch spring 88 is deformed in this manner, the contact 887 is connected to the circuit pattern 8 on the circuit board 85.
Floating from 52, the electrical connection is cut off. That is, in FIG. 13, when the connector piece 80 is attached to the connector section 70, the first switch SW1
Is in an open state, and has a circuit configuration capable of measuring a pulse wave. In addition, even if the electric charge is accumulated in the first capacitor C1, the electric charge is not discharged through the electrode portions 832, 833 and the terminals 752, 753, so that the electric charge is built in the connector portion 70 and the apparatus main body 10. Each circuit does not break.

This switch mechanism has a simple structure, but is reliably linked to the mounting operation of the connector piece 80 to the connector section 70.

Note that the switch mechanism having such a configuration is as follows.
As shown in FIG. 13, it is also configured for the phototransistor 32. As can be seen from FIG. 17, the configuration uses an operating pin 837 and a switch spring 89, similarly to the switch mechanism for the LED 31. Therefore, the description is omitted.

(Structure of Connector Cover) FIG. 18 shows a connector piece when the arm-mounted pulse wave measuring device 1 is used as a normal wristwatch by removing the cable 20 and the sensor unit 30 from the arm-mounted pulse wave measuring device 1. Instead of 80,
FIG. 4 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. Therefore, the connector cover 90 is thin as a whole and has a shape that does not impair the appearance when the connector cover 70 is mounted on the connector portion 70. . However, the mounting structure for the connector section 70 is the same as that of the connector piece 80. That is, on the lower surface portion 901 of the connector cover 90, a pair of projecting portions 91 and 92 projecting downward on both sides thereof are formed. At the lower ends of these protrusions 91, 92, four engagement pieces 911, 912, 921, 922 (second engagement projections) protrude inward. The terminal 7 of the connector 70 is provided on the lower surface 901 of the connector cover 90.
Terminals 7 correspond to the positions where 51 to 756 are arranged.
51 to 756 and a ridge 941 constituting a click mechanism
946 are formed.

When the connector cover 90 is mounted on the connector part 70, similarly to the connector piece 80, the engagement part 71
Cover 90 so that the engagement pieces 911 and 921 of the connector cover 90 are located between the engagement portion 72 and the engagement portion 72 and between the engagement portion 73 and the engagement portion 74.
After that, the connector cover 90 is moved so that the engagement pieces 911 and 921 pass between the engagement portions 71 and 72 and between the engagement portions 73 and 74, respectively. 70, and then the connector cover 90 is slid in the direction of arrow Q (from the 6 o'clock direction to the 12 o'clock position of the device main body 10), the engaging portions 71, 7
The engagement pieces 911 and 921 are sunk under the third piece. In addition, the engagement pieces 912 and 922 go under the engagement portions 72 and 74.
As a result, the engagement pieces 911, 921, 912, 922
Engaging portion 7 between lower surface 901 of connector cover 90
1, 72, 73, and 74 are held, respectively, and the terminals 751 to 756 of the connector 70 pass over the ridges 941 to 946 and exert a click force.
Thus, the connector cover 90 is
0.

(Operation) The operation of the arm-mounted pulse wave measuring apparatus 1 thus configured will be briefly described.

First, in FIG. 1, when the wrist-mounted pulse wave measuring device 1 is used as a normal wristwatch, the cable 2
0 and the sensor unit 30 are detached by the connector 70 of the apparatus main body 10, and the apparatus main body 10 is
2. Attach it to your arm. At this time, the connector cover 90 shown in FIG. 18 is attached to the connector section 70 to enhance the appearance and protect the connector section 70.

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

In this state, as shown in FIG.
When light is irradiated from 1 toward a finger, the light reaches a blood vessel and is partially absorbed by hemoglobin in blood and partially reflected. Light reflected from a finger (blood vessel) is received by the phototransistor 32, and the change in the amount of received light corresponds to a change in blood volume caused by a pulse wave of blood. That is, when the blood volume is large, the reflected light is weakened,
When the blood volume decreases, the reflected light increases. Therefore, if the change in the reflected light intensity is monitored by the phototransistor 32, a pulse and the like can be detected. In order to perform such detection, FIG.
The data processing circuit 50 converts a signal input from the phototransistor 32 (sensor unit 30) into a digital signal, and performs a frequency analysis or the like on the digital signal to calculate a pulse rate. Then, the pulse rate obtained by the calculation is displayed on the liquid crystal display device 13. That is,
The arm-mounted pulse wave measuring device 1 functions as a pulse meter.

In FIG. 7 again, a part of the light emitted from the LED 31 reaches the blood vessel through the finger as shown by the arrow C, and the reflected light from the hemoglobin in the blood is shown by the arrow D. As described above.
The amount of light received on this path is the amount of biological reflection. Also,
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 along this path is the amount of skin reflection. Further, part of the light emitted from the LED 31 and the light reflected from the blood vessel does not reach the phototransistor 32 as absorbed or dispersed in the finger as shown by arrows F and G.

In the sensor unit 30, the LED 31 whose emission wavelength range is from 350 nm to 600 nm
And a phototransistor 32 having a light receiving wavelength range from 300 nm to 600 nm, and displays biological information based on a detection result in a wavelength range from about 300 nm to about 600 nm which is an overlapping area.
Of the light included in the external light, light having a wavelength region of 700 nm or less tends to hardly pass through the finger. Therefore, even if the external light is applied to a part of the finger that is not covered with the sensor fixing band 40, As shown by a dotted line X in FIG. 7, only light in a wavelength region that does not reach the phototransistor 32 (light receiving unit) using the finger as a light guide and does not affect detection passes through the finger as a light guide. Come. Also, since light in a wavelength region lower than 300 nm is almost absorbed by the skin surface, even if the light receiving wavelength region is set to 700 nm or less, the substantial light receiving wavelength region is:
It becomes 300 nm to 700 nm. Therefore, the influence of external light can be suppressed only by covering the minimum necessary range without covering the finger in a large scale. In addition, in the case of the small sensor unit 30 as in this example, the finger is attached to the base of the finger. The hand can be held in a state, and running is not hindered. Further, when the sensor unit 30 is attached to the base of the finger, the cable 20 can be shortened, so that the cable 20 does not become an obstacle during running. Furthermore, even when it is cold, the blood flow does not drop significantly at the base of the finger at the base of the finger, as can be seen from the fact that it does not drop relatively. Can be measured. Therefore, the arm-mounted pulse wave measuring device 1 of this example is suitable for measuring a pulse rate during jogging or a marathon.

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 is from 350 nm to 12 nm.
Ranges up to 00 nm. Therefore, in the conventional optical system (detection device), as shown by the arrow Y in FIG. 7, the detection result of the light having a wavelength of 1 μm, which easily reaches the light receiving portion with the finger as the light guide, as shown by the arrow Y in FIG. , The erroneous detection due to the fluctuation of the external light is likely to occur.

Further, since pulse wave information is obtained using light in a wavelength region from about 300 nm to about 700 nm,
The S / N ratio of the pulse wave signal based on the change in blood volume is high. That is, in the relationship between the wavelength of light and the absorption characteristics of various hemoglobins, hemoglobin in blood has a wavelength of 300 nm.
The absorption coefficient for light from 1 to 700 nm is large, and is several times to about 100 times or more larger than the absorption coefficient for light having a wavelength of 880 nm. Therefore, when light in a wavelength region (300 nm to 700 nm) having a large extinction coefficient is used as detection light in accordance with the absorption characteristics of hemoglobin as in this example, the detection value changes with high sensitivity to blood volume change. In addition, the pulse wave detection rate (S / N ratio) based on the change in blood volume is high.

From the viewpoint of obtaining pulse wave information without being affected by external light, the LED 31
A light emitting wavelength range of 300 nm to 700 nm may be used, and a phototransistor 32 having a light receiving wavelength range of 700 nm or less may be used. For example, a GaP-based LED 31 having a main light emitting region in a range from 540 nm to 570 nm,
It is also possible to use a GaP-based phototransistor 32 having a sensitivity region in a range up to near 00 nm.

(Main Effects of the Embodiment) In the arm-mounted pulse wave measuring apparatus 1 configured as described above, when the connector piece 80 is mounted so as to cover the connector section 70, the upper surface section 701 of the connector section 70 and the connector piece are connected. Lower surface 80 of 80
1 is in a state of being opposed via a narrow gap. When the connector comes into contact with water, the water penetrates deep into the gap by capillary action. Here, in the arm-mounted pulse wave measuring apparatus 1 of this example, the terminals 751 to 756 and the electrode section 8
31 to 836 are arranged in two rows along the sliding direction of the connector piece 80 and are obliquely shifted between the terminals and between the electrodes in a direction orthogonal to the sliding direction. Parts are separated. Therefore, even if water enters between the connector piece 80 and the connector section 70, short-circuiting between the terminals and between the electrodes is unlikely.

Further, when a short circuit occurs, the fact is displayed on the liquid crystal display device 13 of the apparatus main body 10, so that it is possible to immediately determine that the current trouble is caused by the short circuit. Therefore, it is possible to return to a normal state by performing an operation for returning such as waving an arm early.

Further, in the upper surface portion 701 of the connector portion 70, the contact angle of water in the terminal surrounding region 702 surrounding the formation positions of the terminals 751 to 756,
3 is larger than the water contact angle. Further, in the lower surface portion 801 of the connector piece 80, each electrode portion 831 to 8
The contact angle of water in the terminal surrounding region 802 surrounding the formation position of 36 is larger than the contact angle of water in the peripheral region 803. That is, the terminal surrounding areas 702, 8
02 and the peripheral regions 703 and 803, the terminal peripheral regions 702 and 802 have water repellency, whereas the peripheral regions 703 and 803 have hydrophilicity. . Therefore, even if water enters the gap between the connector part 70 and the connector piece 80, each of the terminals 751-7
In the vicinity of 56 and each of the electrode portions 831 to 836, the water is repelled from the terminal surrounding regions 702 and 802 and is drawn to the peripheral regions 703 and 803. Therefore, each terminal 7
Short circuits are unlikely to occur between 51 to 756 and between the electrode portions 831 to 836. Further, even if the short-circuit state occurs temporarily, water can be easily removed from the vicinity of each of the terminals 751 to 756 and each of the electrode portions 831 to 836 by a simple operation of waving the arm. Return.

Therefore, in the arm-mounted pulse wave measuring apparatus 1 of the present embodiment, short-circuiting between the terminals hardly occurs even if a little rain is applied, and even if the short-circuit state occurs temporarily, it can be achieved quickly and easily. This is suitable for measuring a pulse wave during running outdoors.

Moreover, in the arm-mounted pulse wave measuring apparatus 1 of the present embodiment, the contact angles of water in the terminal surrounding areas 702 and 802 in both the upper surface 701 and the lower surface 801 of the connector 70 and the connector piece 80 facing each other. However, since the contact angle is larger than the contact angle of water in the peripheral regions 703 and 803, the occurrence of a short circuit can be more reliably prevented, and the short state can be easily restored.

For example, as shown in Table 2, with respect to the connector portion 70 and the connector piece 80 shown in FIGS.
2 is subjected to a water-repellent treatment using a coating of CYTOP (trade name, manufactured by Asahi Glass Co., Ltd.), and a plasma treatment is applied to a peripheral region 703 as a hydrophilic treatment.
The area 802 around the terminal 0 is water-repellent by coating with MODIPER F200 (trade name, manufactured by NOF CORPORATION), and the peripheral area 803 is formed of a material (upylon, trade name, manufactured by Mitsubishi Gas Chemical Company) of the connector piece 80. : Polycarbonate resin) The sample 1 (connector alone) having its own contact angle and the area 702 around the terminal of the connector section 70 are subjected to water repellency treatment by coating with MODIPER F200 (trade name, manufactured by NOF CORPORATION), and the periphery thereof. A hydrophilic sheet was applied to the area 703, a water repellent treatment was applied to the area 802 around the terminals of the connector piece 80 by coating with CYTOP (trade name, manufactured by Asahi Glass Co., Ltd.), and a hydrophilic sheet was applied to the peripheral area 803. The following test was performed on Sample 2 (connector only) to compare short-circuit resistance and recovery performance. It was.

[0102]

[Table 2]

In sample 1, the terminal surrounding area 702 has a water contact angle of 96.0 °, its peripheral area 703 has a water contact angle of 75.1 °, and the terminal surrounding area 802 has
The contact angle of water is 101.5 °, and the peripheral area 803 is
The water contact angle is 83.3 °. Therefore, in the sample 1, the terminal surrounding regions 702 and 802 are
The contact angle of water is about 10 ° to about 25 ° larger than that of 803.

On the other hand, in the sample 2, the terminal surrounding area 702 has a water contact angle of 101.5 °, the terminal surrounding area 802 has a water contact angle of 96.0 °, and the peripheral area has a contact angle of 96.0 °. In 703 and 803, the contact angle of water is 14.1 °.
Therefore, in the sample 2, the terminal surrounding regions 702, 802
Has a contact angle of water of about 80 ° to about 85 ° larger than that of the peripheral areas 703 and 803.

In samples 1 and 2, the pitch between the terminals and between the electrodes was 0.56 mm.

In this evaluation, a single connector having the same structure as the connector part 70 and the connector piece 80 was
% Salt solution only at the lower end side (edges on the sides of the terminals 751 and 754) and then pulled up. Thereafter, for the samples 1 and 2, the resistance value between the terminal 751 and the terminal 754, the terminal 75
The resistance value between 1 and the terminal 752 was measured. as a result,
It was confirmed that the resistance value was infinite between any of the terminals and no short circuit occurred.

Further, a single connector having the same structure as that of the connector portion 70 and the connector piece 80 was completely immersed in 5% saline solution and then pulled up. A resistance value between the terminal 751 and the terminal 754 and a resistance value between the terminal 751 and the terminal 752 were measured. As a result, as shown in Table 2, the resistance value decreases to several hundred kΩ, and a short-circuit state occurs. However, sample 1,
In any of the two, it was confirmed that the short-circuit state can be restored only by pressing the tissue paper against the lower end side of the connector portion.

Further, in this example, in the connector section 70 and the connector piece 80, the terminal surrounding areas 702, 8
02 is subjected to a water-repellent treatment, and the peripheral regions 703 and 803 are subjected to a hydrophilic treatment to increase the difference in the contact angle of water between these regions. Therefore, each terminal 7
No short circuit occurs between 51 to 756 and between the electrode portions 831 to 836. Further, even if the short-circuit state occurs temporarily, each terminal 751 to 756 and each electrode section 831 are moved by the operation of swinging the arm-mounted pulse wave measuring device 1.
Since the water can be easily removed from the vicinity of 836, it easily returns from the short-circuit state.

For example, as shown in Table 3, with respect to the connector portion 70 and the connector piece 80 shown in FIGS.
2 is subjected to a water-repellent treatment by coating with MODIPER F200 (trade name, manufactured by NOF CORPORATION), and a water-repellent treatment is applied to the terminal peripheral region 802 of the connector piece 80 by coating with CYTOP (trade name, manufactured by Asahi Glass Co., Ltd.). The regions 703 and 803 are composed of a sample 3 (a single connector) having a contact angle of a material (upilon: polycarbonate resin, trade name, manufactured by Mitsubishi Gas Chemical Company) that constitutes the connector section 70 and the connector piece 80, and a terminal of the connector section 70. In the surrounding area 702, Nippon Yushi Co., Ltd. product name MODIPER F
In addition to performing the water-repellent treatment by the coating of 200, the terminal peripheral region 802 of the connector piece 80 is subjected to the water-repellent treatment by the coating of CYTOP (trade name, manufactured by Asahi Glass Co., Ltd.). The following test was performed on the attached sample 4 (a single connector) to compare short-circuit resistance and recovery performance.

[0110]

[Table 3]

In the sample 3, the terminal surrounding area 702 has a water contact angle of 101.5 °, and the terminal surrounding area 802 has
The contact angle of water is 96.0 °, and the peripheral regions 703, 80
No. 3 has a water contact angle of 83.3 °. Therefore, sample 3
, The terminal surrounding regions 702 and 802 are
03, 803, the contact angle of water is about 10 ° to about 2
0 ° larger.

On the other hand, in the sample 4, the terminal surrounding area 702 has a water contact angle of 101.5 °, the terminal surrounding area 802 has a water contact angle of 96.0 °, and the peripheral area has a contact angle of 96.0 °. In 703 and 803, the contact angle of water is 14.1 °.
Therefore, in the sample 4, the terminal surrounding regions 702, 802
Has a contact angle of water of about 80 ° to about 85 ° larger than that of the peripheral areas 703 and 803.

In the sample 3, the pitch between the terminals and between the electrodes is 0.6 mm. On the other hand, with respect to Sample 4, those having a pitch between each terminal and each electrode portion of 0.6 mm and those having a pitch of 0.3 mm were evaluated.

In this evaluation, as shown in FIG. 19A, a single connector having the same structure as the connector part 70 and the connector piece 80 was first completely immersed in 5% saline, and then, as shown in FIG. As shown in FIG. 19), when the operation of free fall with a drop of about 6 cm is repeated as shown in FIGS. 19 (c) and 19 (d), the connection between the electrode portion 834 and the electrode portion 835 is repeated. (Terminal 754
The number of drops required until the resistance value between the terminal and the terminal 755 becomes infinite is measured. The results are as shown in Table 3.

As shown in Table 3, the above test was repeated 20 times, and the average value was compared. As a result, the terminal peripheral regions 702 and 802 were subjected to a water-repellent treatment, and the peripheral region 7
In Sample 4, which had been subjected to the hydrophilization treatment on 03 and 803, when the pitch between the terminals and between the electrode portions was 0.6 mm, the short-circuit state was restored by dropping 1.8 times, and between the terminals and between the terminals. When the pitch between the electrode portions is set to 0.3 mm, a short-circuit state is restored after 2.5 drops.
On the other hand, the sample 3 in which the material constituting the connector portion 70 or the connector piece 80 is modified only in the terminal surrounding regions 702 and 802 recovers from the short-circuit state after falling 9.8 times, It takes time to return.

Further, when the pitch between the terminals and between the electrodes was 0.6 mm, the resistance of Sample 4 was higher than that of Sample 3 immediately after immersion in 5% saline. That is, it was also confirmed that it was difficult to cause a short state.

As a result of repeating the evaluation test,
If the difference between the contact angle of water in the terminal surrounding regions 702 and 802 and the contact angle of water in the peripheral regions 703 and 803 is about 50 ° or more, a short circuit between the terminals hardly occurs, and It has been confirmed that even if a short circuit occurs temporarily, it can be easily recovered.

[Embodiment 2] In the embodiment 1, in the initial state, the terminal surrounding regions 702 and 802 and the peripheral region 703,
803, the contact angle of water is different, but in this example, the connector 70 and the connector piece 80 are different.
Is configured so that short-circuiting between terminals and between electrodes is unlikely to occur even after frequent hand touching.

In this embodiment, the basic configuration is the same as that of the first embodiment. Corresponding portions are denoted by the same reference numerals, and a description of the structure and the like will be omitted. In the lower surface 801 of the connector piece 80 shown in FIG. 15 and the upper surface 701 of the connector 70 shown in FIG. 15, the terminal surrounding regions 702 and 802 are formed of smooth surfaces while the respective regions are made of the same material, and the peripheral regions 703 and 803 are formed. Is composed of fine uneven surfaces.

In the connector structure of the wrist-mounted pulse wave measuring apparatus 1 thus configured, in the initial stage, the contact angle between the terminal surrounding regions 702 and 802 and the peripheral regions 703 and 803 is different from the contact angle of water. In contrast to the first embodiment, the peripheral regions 702 and 802 are not provided.
In some cases, the contact angle of water is slightly smaller than that of the third and third electrodes 803. However, when a fingerprint adheres to the surface, the terminal surrounding regions 702 and 802 formed of smooth surfaces are replaced with the peripheral regions 703 and 803 formed of uneven surfaces. The contact angle of water becomes large as compared with. That is, when fats and oils (for example, glycerin ester of fatty acid) are adhered for the purpose of reproducing the state in which the fingerprint is adhered to each area, as described later in detail, the peripheral areas 703 and 803 configured by the uneven surface are The contact angle of water is smaller than that of the terminal surrounding regions 702 and 802 formed of a smooth surface.

Here, there are various forms of the uneven surface. In this example, as the uneven surface forming the peripheral regions 703 and 803, a surface on which a so-called grain is formed roughly, a surface on which a fine grain is formed, With respect to the surface on which the streaks were formed, the contact angles of water immediately after the molding (initial state) and after the fats and oils were attached were measured. On the other hand, the contact angles of water were measured immediately after molding (in the initial state) and after the fats and oils were adhered to the smooth surfaces that are almost mirror surfaces as the smooth surfaces constituting the terminal surrounding regions 702 and 802. Table 4 shows the measurement results. As the base material, a normal polycarbonate resin and a fluorine-containing polycarbonate resin were used.

[0122]

[Table 4]

As a result, as can be seen from Table 4, in any resin, the contact angle of water is not necessarily smaller on the uneven surface at the initial stage, but the state after the oil or fat is adhered. When compared with the mirror surface, the uneven surface has a smaller contact angle of water by about 10 ° to 20 ° than the mirror surface. In particular, the surface on which fine grain is formed among the uneven surfaces has the best wettability with water.

As described above, while the arm-mounted pulse wave measuring apparatus 1 is used, the connector 70 and the connector piece 8 are not used.
When hand oil adheres to the area around the terminals 702 and 802,
Exhibits water repellency, while its surrounding area 7
03, 803 can be said to exhibit hydrophilicity. In this state, even if water enters the gap between the connector part 70 and the connector piece 80, the water is repelled from the terminal surrounding areas 702 and 802 near the terminals 751 to 756 and the electrode parts 831 to 836, and Areas 703, 8
Attracted to 03. Therefore, each terminal 751-756
And between the electrode portions 831 to 836 are unlikely to cause a short circuit. Further, even if the terminal is short-circuited temporarily, each of the terminals 751 to 75
Since water can be easily removed from the vicinity of the electrode 56 and each of the electrode portions 831 to 836, a short-circuit state can be easily restored.
Moreover, when the presence or absence of unevenness is used to make a difference in the contact angle as in the connector structure, the connector portion 7
There is an advantage that it is only necessary to process the mold for molding the 0 and the connector piece 80.

[0125] It should be noted that, on the surface forming the streaks, the water droplets extend about 10% in the direction along the streaks rather than in the direction crossing the streaks. Therefore, as a structure utilizing such anisotropy of wettability, for example, the peripheral regions 703 and 803 include:
Concentric streaks may be formed in the terminal surrounding regions 702, 802 to prevent water from entering the terminal surrounding regions 702, 802. In addition, as the uneven surface, a surface having a satin pattern may be used in addition to the textured surface and the streaks.

[Other Embodiments] In addition, by combining each treatment as in the first embodiment with the surface shape as in the second embodiment, any of the initial and the temporal (after the attachment of the grease / fingerprint) can be performed. Also in the case of
The contact angles of water at 2, 802 and the peripheral regions 703, 8
If it is configured to be larger than the contact angle of water in 03, a connector structure that does not cause a short-circuit at the beginning or over time and that can be easily restored even if a short-circuit occurs it can.

[0127]

As described above, according to the connector structure of the present invention, the contact angle of water in the region around the terminals surrounding the position where the terminal group is formed is compared with the contact angle of water in the peripheral region of the region around the terminals. Big. That is, comparing the terminal peripheral region with its peripheral region, the terminal peripheral region has water repellency, while the peripheral region has hydrophilicity. Therefore, according to the present invention, even if water enters the gap between the connector portion and the connector member (connector piece), the water near the terminals is repelled from the peripheral region of the terminals and drawn to the peripheral region, so that a short circuit occurs between the terminals. Is less likely to occur. Further, even if the short-circuit state occurs temporarily, the operation can be easily returned from the short-circuit state by a simple operation of swinging the connector portion.

In both the connector portion and the opposing surface of the connector member, the larger the contact angle of water in the region around the terminal with respect to the contact angle of water in the peripheral region, the more reliably the occurrence of short circuit is prevented. As well as easily recover from a short-circuit condition.

Rather than modifying the material constituting the connector portion or the connector member in only one of the terminal peripheral region and the peripheral region, the terminal peripheral region is subjected to a water-repellent treatment and the peripheral region is subjected to a hydrophilic treatment. The application can increase the difference in the contact angle of water between these regions, so that the occurrence of a short circuit can be more reliably prevented, and the short state can be easily restored.

In the present invention, it is not the initial state that the contact angle of water is different between the terminal surrounding area and the peripheral area. Even when grease (fingerprint) is attached to the connector portion and the connector member, the contact angle of water in the region around the terminal is larger than the contact angle of water in the peripheral region, so that occurrence of a short circuit is more reliably prevented. As well as easily recover from a short-circuit condition.

When the difference in the contact angles is provided by utilizing the presence or absence of irregularities, there is an advantage that it is only necessary to process the connector portion and the mold for molding the connector member.

In the present invention, if the first and second terminal groups are arranged so as to be displaced in a direction perpendicular to the sliding direction, the terminals can be formed in a narrow area at positions separated from each other. Short circuit is unlikely to occur.

When such a connector structure is provided in an arm-mounted pulse wave measuring device, a short circuit between the terminals is unlikely to occur even if it is rained, and even if the terminal is temporarily short-circuited, it is difficult to swing the arm. Since it returns with a simple operation, outdoors
Suitable for measuring pulse waves during running.

When a short-circuit detecting means is provided in such an arm-mounted pulse wave measuring apparatus, it is possible to immediately determine that the current trouble is caused by a short circuit. To return to the normal state as soon as possible.

[Brief description of the drawings]

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

FIG. 2 is a plan view of a device main body of the arm-mounted pulse wave measuring device shown in FIG.

FIG. 3 is a bottom view of a device main body of the arm-mounted pulse wave measuring device shown in FIG.

FIG. 4 is an explanatory view when the device main body of the arm-mounted pulse wave measuring device shown in FIG. 1 is viewed from a direction of 6:00 on a wristwatch.

FIG. 5 is an explanatory view when the device main body of the arm-mounted pulse wave measuring device shown in FIG. 1 is viewed from the direction of 3:00 on the wristwatch.

FIG. 6A is a plan view of an optical unit of a sensor unit used in the arm-mounted pulse wave measuring device shown in FIG. 1, and FIG.
Is a plan view showing a state in which the sensor fixing band of the sensor unit used in the arm-mounted pulse wave measuring device is developed,
(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.

FIG. 8 shows In used in the arm-mounted pulse wave measuring device shown in FIG.
FIG. 3 is an explanatory diagram showing an emission spectrum of a GaN-based blue LED.

FIG. 9 shows In used in the arm-mounted pulse wave measuring device shown in FIG.
FIG. 3 is an explanatory diagram illustrating light receiving characteristics of a GaP-based phototransistor.

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

FIG. 11 is a block diagram showing functions of a data processing circuit of the arm-mounted pulse wave measuring device shown in FIG.

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

13 is an explanatory diagram showing an electrical connection relationship in a connector section of the arm-mounted pulse wave measuring device shown in FIG.

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

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

16 is a cross-sectional view showing a state where the connector piece shown in FIG. 14 is mounted on the connector section shown in FIG.

FIG. 17 is a plan view showing an arrangement of each electrode in the connector piece shown in FIG.

18 shows a 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) to (d) are explanatory views showing a test method relating to short-circuit resistance performance and a recovery performance from a short-circuit state of a connector part in which the connector piece shown in FIG. 14 is mounted on the connector part shown in FIG. It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wrist mounted pulse wave measuring device 10 ... Device main body 11 ... Watch case (body case) 12 ... Wrist band 13 ... Liquid crystal display device 20 ... Cable 31 ... LED (Light emitting part) 32 Phototransistor (light receiving part) 40 Band for sensor fixing 70 Connector part 80 Connector member (connector piece) 300 Optical unit 702, 802 Terminal peripheral area 703, 803: Peripheral area 751 to 756: Terminal (first terminal group) 831 to 836: Electrode section (second terminal group)

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Kazumi Sakumoto 1-8-1, Nakase, Mihama-ku, Chiba-shi, Chiba Seiko Electronic Industries Co., Ltd. (56) References JP-A-61-121038 (JP, A) JP-A-7-126041 (JP, A) JP-A-64-66246 (JP, A) JP-A-6-79820 (JP, A) JP-A-4-129527 (JP, A) JP-A-5-340787 (JP) , A) JP-A-3-54425 (JP, A) JP-A-4-31718 (JP, A) JP-A-6-291588 (JP, A) Fully open Hei3,129,104 (JP, U) Really open 62-65595 (JP, U) Japanese Utility Model 63-200410 (JP, U) Japanese Utility Model 63-200411 (JP, U) Japanese Utility Model Application Hei 4-74851 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01R 13/52 A61B 5/0245

Claims (8)

(57) [Claims] A connector provided with a first terminal group, and second connectors electrically connected to the first terminal group when the connector is mounted on the connector so as to cover the connector.
A connector structure comprising: a connector member having a group of terminals; and an engagement mechanism that partially engages the connector member and the connector portion to maintain a state in which the connector member is mounted on the connector portion. The contact angle of water in the area around the terminal surrounding the position where the terminal group is formed is compared with the contact angle of water in the area around the area around the terminal on both surfaces of the connector portion and the connector member facing each other. Connector structure characterized by large size. 2. The connector structure according to claim 1, wherein a difference between a contact angle of water in the peripheral region of the terminal and a contact angle of water in a peripheral region of the peripheral region of the terminal is about 50 ° or more. . 3. The terminal peripheral region according to claim 1, wherein the terminal peripheral region is subjected to a water-repellent treatment, and the peripheral region is subjected to a hydrophilic treatment, whereby water contact in the terminal peripheral region is achieved. A connector structure, wherein the corner is larger than a contact angle of water in a peripheral area of the terminal surrounding area. 4. A connector portion having a first terminal group, and second connector portions respectively electrically connected to the first terminal group when mounted on the connector portion so as to cover the connector portion.
A connector structure comprising: a connector member having a group of terminals; and an engagement mechanism that partially engages the connector member and the connector portion to maintain a state in which the connector member is mounted on the connector portion. When evaluated in a state in which fats and oils are attached, the contact angle of water in the terminal surrounding area surrounding the formation position of the terminal group on both surfaces of the connector portion and the connector member facing each other is A connector structure characterized by having a large contact angle with water in a peripheral area. 5. The terminal peripheral region according to claim 4, wherein the peripheral region of the terminal peripheral region is formed of a smooth surface, and the peripheral region of the terminal peripheral region is composed of an uneven surface. The contact angle of water in the area around the terminal is
A connector structure characterized in that the contact angle is larger than a contact angle of water in a peripheral region of the terminal surrounding region. 6. The connector according to claim 1, wherein the engagement mechanism engages when the connector member is slid on the connector portion, and the connector member is mounted on the connector portion. The first terminal group is configured to hold the mounted state, and to release the engaged state when the connector member is slid in the opposite direction from this state. Are arranged in a plurality of rows along the direction, and are formed so that the position between the terminals is shifted in a direction orthogonal to the sliding direction, and corresponding to the formation position of the first terminal group, The second terminal group is also arranged in a plurality of rows along the sliding direction of the connector member, and the position between the terminals is not in a direction orthogonal to the sliding direction of the connector member. Connector structure, characterized by being that are formed on so that. 7. An arm-mounted pulse wave measuring apparatus having the connector structure defined in any one of claims 1 to 6, wherein the light emitting unit and the light receiving unit face the finger surface. A unit, a display unit for displaying pulse wave information obtained based on a light receiving result of the light receiving unit, and a device main body having the connector unit at an end, and a wristband for attaching the device main body to an arm The connector member is formed at a distal end portion extending from the sensor unit, and when the connector member is mounted on the connector portion, a light receiving result of the light receiving portion is input to the device main body via the terminal group. An arm-worn pulse wave measuring device, comprising a cable capable of being used. 8. The apparatus main body according to claim 7, wherein when the connector member is attached to the connector portion, a signal is input from at least the sensor unit of the first terminal group via the cable. The potential of the terminal on the side is measured to detect whether the terminal and the terminal for applying a drive voltage to the sensor unit via the cable are in a short-circuit state, and the detection result is displayed on the display unit. An arm-mounted pulse wave measuring device, characterized in that the device comprises a short-circuit detecting means for displaying the pulse wave on the arm.