JP5428510B2 - Pulse wave acquisition device and pulse measurement device - Google Patents

Description

  The present invention relates to a pulse wave acquisition device and a pulse measurement device, and in particular, a pulse wave acquisition device that is attached to a part of a human body and detects a pulse wave, and a pulse measurement device that measures a pulse based on an acquisition result by the pulse wave acquisition device About.

  In recent years, public awareness of metabolic syndrome has increased social interest in health. In “Exercise Standards 2006 for Physical Promotion / Physical Activity / Exercise / Physical Strength” formulated by the Ministry of Health, Labor and Welfare, the standard values of physical activity and exercise amount for preventing lifestyle-related diseases are defined. Based on this, the “Exercise Guide 2006” was issued by the Study Committee on Establishing the Required Exercise and Guidelines, and the national exercise for the health of the people, including the specific exercises and activities of daily life, is shown. There is also an effort to raise. Against this background, recently, walking has been reviewed as an exercise that anyone can easily perform, and it is desired to more accurately measure the amount of activity during the walking. Pulse measurement is effective for measuring this amount of activity.

  Conventionally, as a device that measures the amount of activity while exercising using equipment such as a running machine or an exercise bike indoors such as a fitness gym, a pulse meter that measures the pulse from the blood flow of the ear is used. It has been.

  As an example of this type of pulse meter, for example, the one disclosed in Patent Document 1 can be cited. In Patent Document 1, a configuration in which the optical axes of a light emitting element (light emitting diode) and a light receiving element (light receiving phototransistor) are substantially matched is disclosed.

JP 2008-43515 A

  However, when the pulse meter as described above is used outdoors, there is a possibility that the pulse cannot be measured accurately due to the influence of external light that has passed through the ear enters the light receiving element. In particular, while moving in the shade, the incident light changes irregularly due to the sunbeams, which may make it impossible to measure the pulse.

  As a method for suppressing the influence of the external light, there is a method for improving the S / N ratio of the detection signal in the light receiving element. In order to improve the S / N ratio, for example, a light-emitting element such as an LED has high directivity, that is, high condensing performance, and a lens for condensing light emitted from the light-emitting element. There is a method of using. However, since light emitting elements and lenses with high directivity are relatively expensive, when these are used, the manufacturing cost may increase.

  As a method of suppressing the influence of external light, the effect of the external light is obtained by sandwiching the earlobe with a convex member (for example, a lens), increasing the pressure applied to the earlobe, and reducing the thickness of the earlobe. There is also a method for reducing this. However, when the thickness of the earlobe is reduced, blood flow in the portion is reduced, and there is a possibility that the pulse measurement of a person with low blood pressure such as an elderly person cannot be performed.

  Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a pulse wave acquisition device capable of acquiring pulse waves with high accuracy while suppressing the influence of external light. Another object of the present invention is to provide a pulse measuring device capable of measuring a pulse with high accuracy.

A pulse wave acquisition device described in this specification includes a light emitting unit having a light emitting element that emits detection light, and a light receiving unit that has a light receiving element that faces the light emitting element and receives the detection light emitted from the light emitting element. A pulse wave acquisition device that is attached to a human body in a state where a part of the human body is sandwiched between the light emitting unit and the light receiving unit, and acquires a pulse wave from a light reception result of the light receiving element, The light receiving portion covers a surface of the light receiving element facing the light emitting element, and covers a light transmitting portion light transmitting member that transmits the detection light and a surface of the light receiving portion light transmitting member that faces the light emitting element. A light-receiving-part covering member provided at a position surrounded by the opening, and a part of the light-receiving-part light-transmitting member existing in a position surrounded by the opening is fitted in the opening. a comb protrusions, convex portion, covering the light receiving portion The light for the light emitting part that does not protrude to the light emitting part side than the surface on the light emitting part side of the material, the light emitting part covers the surface of the light emitting element that faces the light receiving element, and transmits the detection light. A light-transmitting member, and a light-emitting portion covering member provided so as to cover a surface of the light-transmitting portion light-transmitting member facing the light-receiving element, and having an opening through which the detection light passes. The vicinity of the end portion in the predetermined direction of the light emitting portion and the vicinity of the end portion in the predetermined direction of the light emitting portion are connected by a hinge, and the opening of the covering member for the light receiving portion is based on the central portion in the predetermined direction of the covering member for the light receiving portion As described above, the opening of the light emitting portion covering member is provided on the opposite side of the hinge with respect to the central portion in the predetermined direction of the light emitting portion covering member. It is a pulse wave acquisition device.

  A pulse measurement device described in the present specification includes a pulse wave acquisition device described in the specification, and a measurement device that measures a pulse based on the pulse wave acquired by the pulse wave acquisition device. Device.

  The pulse wave acquisition device and the pulse measurement device described in the present specification have the effect of suppressing the influence of external light and performing highly accurate pulse wave detection and pulse measurement.

It is a perspective view which shows the ear clip which concerns on one Embodiment. It is a disassembled perspective view of the ear clip of FIG. It is a disassembled perspective view of the light emission part of FIG. It is a disassembled perspective view of the light-receiving part of FIG. It is a figure which shows an ear clip partially in cross section. FIG. 6A shows the directivity of the LED element used in one embodiment, and FIG. 6B shows an example of the directivity of the LED element used in the conventional example. 7A and 7B are cross-sectional views of a visible light cut filter and an aperture control rubber according to an embodiment, and FIG. 7C is a visible light cut filter and an aperture control according to a modification. It is sectional drawing of a rubber. It is a graph used in order to determine the opening diameter in the opening control rubber of one Embodiment. FIG. 9A shows the state of external light incident on the earlobe when the ear clip according to one embodiment is attached to the earlobe, and FIG. 9B shows that the earclip according to the conventional example is attached to the earlobe. In the meantime, it is a figure which shows the state of the external light which injects into an earlobe. It is a control block diagram of an ear clip and a mobile phone. It is a graph which shows the relationship between the pressure applied with respect to an earlobe, and a content rate. FIG. 12A shows an attachable range of the ear clip according to the embodiment, and FIG. 12B shows an attachable range of the ear clip when the opening is provided in the central portion of the opening control rubber. It is.

  Hereinafter, an embodiment of a pulse wave acquisition device and a pulse measurement device will be described in detail with reference to FIGS.

  FIG. 1 is a perspective view of an ear clip 100 as a pulse wave acquisition device. The ear clip 100 is a device that acquires a pulse wave while being worn on a person's earlobe. As shown in FIG. 1, the ear clip 100 includes a light emitting unit 10, a light receiving unit 20 connected to the light emitting unit 10, and a wiring 30 connected to the light emitting unit 10 and the light receiving unit 20.

  FIG. 2 is a diagram illustrating a state where the light emitting unit 10 and the light receiving unit 20 are separated. As shown in FIG. 2, the light emitting unit 10 and the light receiving unit 20 are connected via a shaft member 32. As a result, in the ear clip 100, the light emitting unit 10 and the light receiving unit 20 can be pivoted up and down in the directions indicated by arrows A and A 'shown in FIG. The shaft member 32 is provided with a torsion coil spring 34 as shown in FIG. The torsion coil spring 34 constantly applies a biasing force in the direction of arrow A in FIG. 1 to the light emitting unit 10 and the light receiving unit 20.

  FIG. 3 is an exploded perspective view of the light emitting unit 10, and FIG. 4 is an exploded perspective view of the light receiving unit 20. As shown in FIG. 3, the light emitting unit 10 includes a cover case 12, an LED mounting substrate 14, a visible light cut filter 16 as a light transmitting member for the light emitting unit, and an opening control rubber 18 as a covering member for the light emitting unit. .

  The cover case 12 is formed by injection molding or the like of a material that does not transmit light from the infrared region to the ultraviolet region, such as a resin such as PC / ABS resin or biodegradable plastic. As can be seen from FIG. 5 that shows a partial cross section of the ear clip 100, the cover case 12 has a recess 122 formed in a part thereof. Further, as shown in FIG. 2, the cover case 12 has a pair of hinge portions 124a and 124b having a substantially triangular plate shape. Circular through-holes 126a and 126b are formed in the hinge portions 124a and 124b, respectively.

  The LED mounting substrate 14 is connected to the mobile phone 200 (see FIG. 10) via the wiring 30 of FIG. The LED mounting substrate 14 is mounted with several LED (Light Emitting Diode) elements 142 and other chip components. As the LED element 142, an infrared LED that emits infrared light as detection light is used. Here, as the LED element 142, an LED element having directivity as shown in FIG. This LED element 142 has directivity lower than the directivity of the LED element used in the conventional pulse meter shown in FIG.

  Returning to FIG. 3, the visible light cut filter 16 is a filter that passes only light in the infrared region. The visible light cut filter 16 has a circular convex portion 162.

  The opening control rubber 18 is formed by molding a material such as rubber that does not transmit light from the infrared region to the ultraviolet region. The lower surface of the opening control rubber 18 in FIG. 5 is set to have a larger coefficient of friction than the lower surface of the convex portion 162 of the visible light cut filter 16. The opening control rubber 18 has a size that can cover the recess 122 of the cover case 12, and a circular opening 182 that penetrates in the vertical direction is formed in a part of the opening control rubber 18. As shown in FIG. 2, the position of the opening 182 in the opening control rubber 18 is disposed on the far side from the hinge parts 124 a and 124 b with respect to the central part in the longitudinal direction of the opening control rubber 18. The circular convex portion 162 of the visible light cut filter 16 is fitted into the opening 182. That is, the convex portion 162 and the opening 182 have a function of positioning the visible light cut filter 16 with respect to the opening control rubber 18. Here, in the present embodiment, as shown in FIG. 7A, the height dimension a of the convex portion 162 of the visible light cut filter 16 is set smaller than the depth dimension b of the opening 182 of the opening control rubber 18. Has been. Thereby, the convex part 162 does not protrude from the surface of the opening control rubber 18.

  In the light emitting unit 10, after the LED mounting substrate 14 is disposed in the recess 122 of the cover case 12, the LED mounting substrate 14 is covered with the visible light cut filter 16, and further the opening control rubber 18 is covered so as to cover the visible light cut filter 16. It can be assembled by providing.

  As shown in FIG. 4, the light receiving unit 20 includes a cover case 22, a PD mounting substrate 24, a visible light cut filter 26 as a light transmitting member light receiving member, and an opening control rubber 28 as a light receiving unit covering member. .

  The cover case 22 is made of the same material as the cover case 12 of the light emitting unit 10 and has substantially the same shape although being vertically symmetrical. That is, a recess 222 is formed in a part of the cover case 22. Further, as shown in FIG. 2, the cover case 22 has a pair of hinge portions 224a and 224b having a substantially triangular plate shape. Circular through holes 226a and 226b are formed in the hinge portions 224a and 224b. The interval between the hinge portions 224a and 224b is set larger than the interval between the hinge portions 124a and 124b of the cover case 12 of the light emitting portion 10.

  The PD mounting substrate 24 is connected to the mobile phone 200 (see FIG. 10) via the wiring 30 of FIG. The PD mounting substrate 24 has a PD (Photodiode) element 242 and several other chip components mounted thereon. As shown in FIG. 5, the optical axis of the PD element 242 is in a state that coincides with the optical axis of the LED element 142. In the PD mounting substrate 24, detection light emitted from the LED element 142 and transmitted through the earlobe is received by the PD element 242 and converted into an electric signal to obtain a pulse wave. The visible light cut filter 26 is vertically symmetric with the visible light cut filter 16 on the light emitting unit 10 side, but has the same configuration and the same function. That is, a circular convex portion 262 is provided on the upper surface of the visible light cut filter 26 in FIG.

  The aperture control rubber 28 is formed by molding a material that does not transmit light from the infrared region to the ultraviolet region, and is vertically symmetric with the aperture control rubber 18 on the light emitting unit 10 side, but has the same configuration and the same function. Have. The upper surface of the opening control rubber 28 in FIG. 5 is set to have a higher friction coefficient than the upper surface of the visible light cut filter 26. The opening control rubber 28 has a size that can cover the recess 222 of the cover case 22, and a circular opening 282 that penetrates in the vertical direction is formed in a part of the opening control rubber 28. As shown in FIG. 2, the position of the opening 282 in the opening control rubber 28 is arranged on the far side from the hinges 224 a and 224 b with respect to the central portion in the longitudinal direction. As shown in FIG. 7B, the circular convex portion 262 of the visible light cut filter 26 is fitted into the opening 282. Here, the convex portion 262 and the opening 282 have a function of positioning the visible light cut filter 26 with respect to the opening control rubber 28. Also in this case, the convex portion 262 of the visible light cut filter 26 does not protrude from the surface of the opening control rubber 28 as in the light emitting unit 10 side. The diameter of the opening 282 is set to be the same as or larger than the diameter of the opening 182.

  The light receiving unit 20 arranges the PD mounting substrate 24 in the recess 222 of the cover case 22, covers the PD mounting substrate 24 with the visible light cut filter 26, and further opens the opening control rubber 28 so as to cover the visible light cut filter 26. It can be assembled by providing. Further, the ear clip 100 is assembled by inserting the shaft member 32 into the through holes (126a, etc.) of the hinge portions 124a, 124b, 224a, 224b in a state where the light emitting portion 10 and the light receiving portion 20 are overlapped. Is completed. When the shaft member 32 is inserted into each through hole, the torsion coil spring 34 is disposed between the hinge portions 224a and 224b, and at the same time as the shaft member 32 is inserted into the through hole (126a, etc.), the shaft member 32 is inserted. 32 needs to hold the torsion coil spring 34. As shown in FIG. 5, the distance D between the facing surfaces in a state where the facing surfaces of the opening control rubbers 18 and 28 are parallel to each other is set to about 5 mm. This considers the average thickness (about 5.5 mm) of a person's (here, Japanese) earlobe. However, the present invention is not limited to this, and the interval D may be appropriately changed according to the average thickness of the earlobe of the person in the country or region where the ear clip 100 is used.

  Here, as described above, in this embodiment, an LED element having a lower directivity than the conventional one is used as the LED element 142, and in this embodiment, in this embodiment, the aperture control rubber 18 (and 28) The size of the opening 182 (and 282) is set larger than the conventional size. Specifically, when the LED element 142 of the present embodiment is used, there is a relationship as shown by a solid line in FIG. 8 between the diameter of the opening 182 (282) and the output of the PD element 242. Therefore, in this embodiment, in order to make the output of the PD element 242 equivalent to the conventional (output 250 [mV]), as shown in FIG. 8, the opening diameter is larger than the conventional (opening diameter 3 mm). 5 mm to 9 mm is adopted.

  However, when the opening diameter is increased, external light may easily enter the PD element 242 through the opening 282. Therefore, in the present embodiment, as described above, the visible light cut filter 16 (26) is set so as not to protrude from the opening control rubber 18 (28) (FIGS. 7A and 7B). )reference). FIG. 9A schematically shows a state of external light incident on the earlobe when the ear clip 100 of the present embodiment is attached to the earlobe. FIG. 9B schematically shows a state of external light incident on the earlobe when a conventional ear clip is attached to the earlobe. As shown in these figures, conventionally, the visible light cut filter 16 (26) protrudes from the opening control rubber 18 (28), so that external light incident on the earlobe passes through the earlobe and cuts visible light. It was easy to enter the PD element 242 from the filter 26 (see FIG. 9B). On the other hand, in the present embodiment, since the configuration as shown in FIG. 9A is adopted, even if the external light is incident on the earlobe, the external light is incident on the PD element 242 by the opening control rubber 28. Can be blocked.

  FIG. 10 is a control block diagram of the mobile phone 200 to which the ear clip 100 of this embodiment and the wiring 30 of the ear clip 100 are connected. As shown in FIG. 10, the mobile phone 200 includes a control unit 210, a pulse measurement unit 220, a display unit 230, and an input unit 240 including a numeric keypad. The control unit 210 controls emission of the detection light from the LED element 142 based on an instruction from the user via the input unit 240. The pulse measurement unit 220 includes a pulse wave detection unit 221 that detects a photoelectric pulse wave component from the output of the PD element 242, and a pulse calculation unit 223 that calculates a pulse rate based on the pulse wave signal detected by the pulse wave detection unit 221. And having. The pulse rate obtained by the pulse calculating unit 223 is sent to the control unit 210, and the control unit 210 displays the pulse rate and information related to the pulse rate on the display unit 230.

  As described above in detail, according to the ear clip 100 of the present embodiment, the light emitting unit 10 having the LED element 142 that emits the detection light, and the detection light that is opposed to the LED element 142 and is emitted from the LED element 142. A light receiving unit 20 having a PD element 242 that receives light, and a portion (convex portion) of the visible light cut filter 26 included in the light receiving unit 20 that is present at a position surrounded by the opening 282 of the opening control rubber 28. 262) does not protrude from the opening control rubber 28 to the light emitting unit 10 side. Therefore, as shown in FIG. 9A, the opening control rubber 28 can suppress the external light transmitted through the earlobe from entering the PD element 242 via the visible light cut filter 26. Further, by suppressing the incidence of external light to the PD element 242, it is possible to acquire pulse waves and measure the pulse with high accuracy even outdoors. In particular, even in a situation where a pulse wave is acquired while moving in the shade, it is possible to acquire a pulse wave and measure a pulse while reducing the influence of a sunlight through a tree.

  In the present embodiment, the portion (convex portion 162) of the visible light cut filter 16 of the light emitting unit 10 that is located at the position surrounded by the opening 182 of the opening control rubber 18 receives light more than the opening control rubber 18. It does not protrude to the part 20 side. Therefore, the protrusion 162 (262) of the visible light cut filter 16 (26) protrudes from the opening control rubber 18 (28) as in the conventional case (FIG. 9B). The contact area between the earlobe and the earlobe can be increased. Thereby, in the part which light permeate | transmits, the pressure applied to the earlobe from the ear clip 100 can be made small (70 mmHg-90 mmHg: Conventionally about 100 mmHg).

  Thus, in this embodiment, since the pressure concerning an earlobe can be made small, the accuracy of pulse wave acquisition and pulse measurement can be improved. Specifically, when the blood pressure at the measurement site (earlobe) is low, that is, when the user who measures the pulse wave (pulse) is hypotension or an elderly person, the blood flow is converted into an electrical signal. There is a possibility that the amplitude value at the time becomes small. Here, the amplitude value means a value representing a change in light transmittance according to the light absorption amount of hemoglobin in blood. That is, when the blood pressure at the measurement site is low, the signal to be detected is likely to be buried in noise. In such a situation, if the ear clip structure that increases the pressure on the earlobe and pushes away the accumulated blood is adopted as in the conventional case, the blood flow volume is reduced by the pressing, and the amplitude value of the pulse wave May be further reduced. On the other hand, in the configuration of the present embodiment, the pressure applied to the portion of the earlobe through which the detection light passes can be reduced, so that the reduction of the blood flow rate in the portion can be suppressed.

  FIG. 11 is a graph showing experimental results on the relationship between the pressure applied to the earlobe (100 mmHg, 90 mmHg, 70 mmHg) and the content rate. Here, the content rate means the ratio of the detection light received by the PD element 242 to the detection light emitted from the LED element 142. That is, the wider the content ratio can be, the higher the S / N ratio can be secured, and the pulse wave can be measured with high accuracy. As shown in FIG. 11, when the earlobe is pressed at 70 to 90 mmHg as in the present embodiment, the range of the content rate is wider than when pressed at 100 mmHg. Therefore, from this experiment, it was proved that a high S / N ratio can be ensured by pressing the earlobe at 70 to 90 mmHg, compared to the case where the earlobe is pressed at 100 mmHg. That is, by adopting the configuration of this embodiment, even when measuring the pulse of a person with low blood pressure, the pulse measurement can be performed easily and with high accuracy.

  In the present embodiment, the detection light is infrared light, and the aperture control rubbers 18 and 28 have a property of not transmitting light from the infrared region to the ultraviolet region. It is possible to suppress the incidence of light.

  In the present embodiment, the visible light cut filters 16 and 26 prevent light outside the infrared region from entering the PD element 242, so that the influence of external light on the PD element 242 can be suppressed. it can.

  Further, in the present embodiment, the vicinity of the longitudinal end of the light receiving unit 20 and the vicinity of the longitudinal end of the light emitting unit 10 are connected via the hinges 124a, 124b, 224a, 224b, and the opening 182 (282). ) Is arranged from the opposite side of the hinge portion with reference to the longitudinal central portion of the opening control rubber 18 (28) (see FIG. 2). Here, as shown by the solid line in FIGS. 12A and 12B, the ear clip 100 has an upper end portion below the position U and an opening 182 (282 as shown by the broken line). ) Can be obtained if the lower end portion is disposed above the position L. Therefore, by arranging the opening 182 (282) at the position as described above, the pulse wave acquirable range can be set to H1, as shown in FIG. This range H1 is larger than the pulse wave acquirable range H2 when the opening 182 (282) is arranged at the center of the opening control rubber 18 (28) as shown in FIG. As described above, in this embodiment, since the pulse wave acquisition range is wide, the probability of occurrence of a mounting error when attaching the ear clip 100 to the earlobe and a pulse wave acquisition error, and thus a pulse measurement error is reduced. can do.

  Moreover, since the ear clip 100 of this embodiment is connected to the mobile phone 200 as shown in FIG. 10, it is assumed that the pulse is measured while exercising, for example, outdoors. For this reason, the ear clip 100 is required to have durability as a device. Here, the durability of the device includes the durability of the hinge portion of the ear clip 100, and the looseness or displacement of the hinge portion causes the optical axis shift of the LED element 142 and the PD element 242, and the PD element 242 Causes detection light not to be received. However, in the present embodiment, as described above, the opening 182 (282) is set larger than the conventional one, so that the PD element 242 receives the detection light even if the hinge portion is slightly loosened or displaced. It is possible. That is, the durability of the ear clip 100 can be improved.

  In the present embodiment, since it is not necessary to mount a lens on the light receiving unit 20, the light receiving unit 20 and thus the ear clip 100 can be reduced in size and weight. Further, by not mounting the lens, the ear clip 100 can be manufactured at a lower cost than in the past.

  In this embodiment, since the diameter of the opening 282 is set to be equal to or larger than the diameter of the opening 182, even when the LED element 142 with low directivity is used, the light receiving amount in the PD element 242 is increased. can do.

  In this embodiment, the friction coefficient of the surface of the opening control rubber 18 (28) that contacts the earlobe is larger than the friction coefficient of the surface of the convex portion 162 (262) of the visible light cut filter 16 (26) that contacts the earlobe. Since it is set, dropping of the ear clip 100 from the earlobe can be suppressed by increasing the coefficient of friction of the portion in contact with the earlobe over a wide area.

  In the above embodiment, the case where the ear clip 100 has a function as a pulse wave acquisition device and the pulse measurement unit 220 of the mobile phone 200 has a function as a pulse measurement device has been described. It is not a thing. For example, the PD mounting substrate 24 may have the function of the pulse measurement unit 220 of FIG. In this case, since the pulse can be measured without connecting the ear clip 100 to the mobile phone 200, the function of the ear clip 100 itself is demonstrated as a pulse measuring device. Further, only a part of the pulse measurement unit 220 may be provided on the PD mounting substrate 24.

  In addition, although the said embodiment demonstrated the case where the visible light cut filters 16 and 26 were employ | adopted as the light transmissive member for light receiving parts and the light transmissive member for light emitting parts, it is not restricted to this. That is, various members can be used as long as they are members that can transmit the detection light and prevent the LED element 142 and the PD element 242 from being directly touched by a person.

  In the above embodiment, as shown in FIGS. 7A and 7B, the convex portions 162 and 262 of the visible light cut filters 16 and 26 are lowered from the surfaces of the opening control rubbers 18 and 28. However, the present invention is not limited to this. That is, the visible light cut filters 16 and 26 are not required to protrude from the surfaces of the opening control rubbers 18 and 28. Specifically, as shown in FIG. 7C, the surfaces of the convex portions 162 and 262 of the visible light cut filters 16 and 26 (the lower surface of FIG. 7C) are the surfaces of the opening control rubbers 18 and 28 (the lower surface). It may be the same. Moreover, it is good also as not providing the convex parts 162 and 262 in the visible light cut filters 16 and 26.

  In addition, although the said embodiment demonstrated the case where the opening 182 and 282 and the convex part 162 and 262 were circular, it is not restricted to this. For example, an oval shape, a substantially circular shape, or other shapes may be employed.

  In the above embodiment, the case where the lens is not mounted on the ear clip 100 has been described. However, the present invention is not limited to this, and a lens may be added to a part of the above configuration.

  In the above embodiment, the case where the ear clip 100 is attached to the earlobe has been described. However, the present invention is not limited to this, and the ear clip 100 may be attached to another part of the ear. Moreover, it is good also as not only an ear | edge but attaching to other parts (finger etc.) of a human body, and acquiring a pulse wave and measuring a pulse.

  The above-described embodiment is an example of a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

10 Light Emitting Unit 16 Visible Light Cut Filter (Light Transmitting Member for Light Receiving Unit)
18 Aperture control rubber (light-receiving coating)
20 light receiving part 26 visible light cut filter (light transmitting member for light emitting part)
28 Aperture control rubber (light receiving coating)
100 ear clip (pulse wave acquisition device)
124a, 124b Hinge part 142 LED element (light emitting element)
162 Convex part (part of visible light cut filter)
182 opening 224a, 224b hinge part 220 pulse measuring part (measuring device)
242 PD element (light receiving element)
262 Convex (part of the visible light cut filter)
282 opening

Claims (6)

A light-emitting unit having a light-emitting element that emits detection light; and a light-receiving unit that faces the light-emitting element and has a light-receiving element that receives the detection light emitted from the light-emitting element. A pulse wave acquisition device that is attached to a human body with a part of the human body sandwiched between the part and acquires a pulse wave from a light reception result of the light receiving element,
The light receiving unit is
Covering the surface of the light receiving element facing the light emitting element, and providing the light transmitting part light transmitting member that transmits the detection light, and covering the surface of the light receiving part light transmitting member facing the light emitting element, A light receiving portion covering member having an opening through which the detection light passes, and a part of the light receiving member light transmitting member present at a position surrounded by the opening is a convex portion that fits into the opening. Yes, the convex part does not protrude to the light emitting part side from the light emitting part side surface of the light receiving part covering member,
The light emitting unit
Covering the surface of the light emitting element facing the light receiving element, and providing the light transmitting part light transmitting member that transmits the detection light, and the surface of the light emitting part light transmitting member facing the light receiving element, And a light emitting part covering member having an opening through which the detection light passes.
The vicinity of the end portion in the predetermined direction of the light receiving portion and the vicinity of the end portion in the predetermined direction of the light emitting portion are connected by a hinge,
The opening of the light receiving portion covering member is provided on the opposite side of the hinge with respect to a central portion in a predetermined direction of the light receiving portion covering member,
The pulse wave acquisition device according to claim 1, wherein the opening of the light emitting portion covering member is provided on a side opposite to the hinge with respect to the central portion in the predetermined direction of the light emitting portion covering member.   The surface of the light receiving portion covering member facing the light emitting portion covering member has a larger coefficient of friction than the surface of the light receiving portion light transmitting member facing the light emitting portion light transmitting member, and the light emitting portion covering member The surface of the member facing the light receiving portion covering member has a friction coefficient larger than that of the surface of the light emitting portion light transmitting member facing the light receiving portion light transmitting member. Pulse wave acquisition device. A part of the light transmitting member light transmitting member present at a position surrounded by the opening of the light emitting unit covering member does not protrude toward the light receiving unit side than the light emitting unit covering member. The pulse wave acquisition device according to claim 1 or 2 . Diameter of the opening provided in the cover member for the light receiving unit, in any one of claims 1-3, characterized in that the a light emitting portion for covering member diameter greater or equal than the aperture having the size The described pulse wave acquisition device. The light receiving unit, the detection light emitted from the light emitting element without condensing, pulse wave acquiring according to any one of claims 1 to 4, characterized in that received by the light receiving element apparatus. The pulse wave acquisition device according to any one of claims 1 to 5 ,
A pulse measuring device comprising: a measuring device that measures a pulse based on the pulse wave acquired by the pulse wave acquiring device.

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