JP2017051273A - Pressure pulse wave detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure pulse wave detection device capable of easily acquiring a state in which a pressure pulse wave can be accurately detected.SOLUTION: A pressure pulse wave detection device includes a housing for accommodating pressure pulse wave detection sensors 10a, 10b, and 10c for detecting a pressure pulse wave from the radial artery TD of a person to be measured, and a positioning part (through-hole 23) provided in the housing for positioning the pressure pulse wave detection sensors. The through-hole and the pressure pulse wave detection sensors are disposed side by side in a circumferential direction of a wrist. The through-hole is fitted to a styloid process Ta of the radius of the person to be examined so that the pressure pulse wave detection sensors are positioned above the radial artery of the person to be examined.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a pressure pulse wave detection device.

  A biological information measuring device capable of measuring biological information such as pulse and blood pressure using information detected by the pressure sensor in a state where the pressure sensor is in direct contact with a biological part through which an artery such as the radial artery of the wrist passes. Is known (see, for example, Patent Documents 1 to 3).

  In Patent Document 1, biological information that can stably maintain the mounting state of the device on the wrist by providing an opening for avoiding the ulna in a portion wound around the back of the hand while being mounted on the wrist. A measuring device is described.

  Patent Document 2 includes a marking portion for indicating a band winding strength according to the degree of expansion and contraction of a band wound around a wrist and capable of expanding and contracting in the winding direction. Describes a biological information measuring device provided with a reference button serving as a reference for determining whether or not the degree of expansion and contraction corresponds to the optimum band winding strength.

  According to this biological information measuring device, by attaching the device using the marking unit and the reference button, the device can be attached with the optimum band winding strength regardless of the thickness of the wrist of the user. .

JP 2008-168054 A JP 05-329117 A

  The biological information measuring devices of Patent Document 1 and Patent Document 2 are mounted on the wrist by turning the band to the back side of the hand and fixing it from the state where the pressure sensor portion is held near the radial artery. .

  However, it is difficult for a person other than the medical staff to know which side the radial artery is located. For this reason, it is not easy to obtain a state in which the pressure sensor is applied to the wrist so that the pressure pulse wave can be detected with high accuracy.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a wrist-worn pressure pulse wave detection device that can easily obtain a state in which a pressure pulse wave can be detected with high accuracy. To do.

  The pressure pulse wave detection device of the present invention includes a housing that houses a pressure pulse wave detection sensor that detects a pressure pulse wave from the radial artery of the wrist of the measurement subject, and the pressure pulse wave detection sensor that is provided in the housing. A positioning portion for positioning the positioning portion, wherein the positioning portion and the pressure pulse wave detection sensor are arranged side by side in a circumferential direction of a wrist, and the positioning portion faces a wrist in the casing. The pressure pulse wave detection is performed by a recess provided in the surface, a through hole provided in the housing, or a notch provided in the housing, and fitted into a stem-like protrusion of the measurement subject's rib. The sensor is positioned above the radial artery of the measurement subject.

  According to the present invention, it is possible to provide a wrist-worn pressure pulse wave detection device that can easily obtain a state in which a pressure pulse wave can be detected with high accuracy.

It is a mimetic diagram showing appearance composition of case 20 of a living body information measuring device for explaining one embodiment of the present invention. It is the top view which looked at the pressure pulse wave detection part 10 and the through-hole 23 in the housing | casing 20 of FIG. 1 from the wrist side. FIG. 2 is a schematic diagram of a circumferential cross section of a wrist H passing through a through hole 23 of a housing 20 shown in FIG. 1. It is a figure for demonstrating the mounting method to the wrist of the housing | casing 20. FIG. FIG. 6 is a cross-sectional view corresponding to FIG. 3 of a housing 20A that is a modified example of the housing 20. It is a perspective view corresponding to Drawing 1 of case 20B which is a modification of case 20.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic diagram showing an external configuration of a housing 20 of a biological information measuring device for explaining an embodiment of the present invention. The biological information measuring device is used by attaching the housing 20 to the wrist of the person to be measured.

  FIG. 1 shows the left wrist H of the person to be measured, and the front side in the figure is the direction in which the hand of the person to be measured exists. Further, the upper side in the figure is the direction in which the palm is facing. In the wrist H, a radius T, an ulna S, and a radial artery TD are illustrated.

  The biological information measuring apparatus according to the present embodiment includes a pressure pulse wave detection unit 10 that detects a pressure pulse wave from the radial artery TD along the rib T of the wrist H of the measurement subject, and is detected by the pressure pulse wave detection unit 10. Biological information such as blood pressure value and pulse rate is measured based on the pressure pulse wave.

  The pressure pulse wave detector 10 can employ a known configuration. For example, the pressure pulse wave detection unit 10 includes a pressure pulse wave detection sensor and a mechanism that presses the pressure pulse wave detection sensor against the skin.

  The biological information measuring apparatus according to the present embodiment includes a pressure pulse wave detection unit 10 and biological information (not shown) that calculates biological information such as a blood pressure value and a pulse rate based on the pressure pulse wave detected by the pressure pulse wave detection unit 10. A housing 20 that houses the calculation unit and a band for fixing the housing 20 to be described later to the wrist are provided.

  The biological information measurement device of the present embodiment only needs to have at least the pressure pulse wave detection unit 10 and functions as a pressure pulse wave detection device. For example, the biological information calculation unit may be provided in a device different from the biological information measurement device.

  The casing 20 is configured to be wound along a circumferential direction of the wrist H (hereinafter also referred to as a circumferential direction), and has a substantially U shape in which the ulna S side of the wrist H is opened. The housing 20 is configured such that the ulna S is not covered between both ends in the circumferential direction of the wrist H.

  The casing 20 includes a casing 1 that houses the pressure pulse wave detection unit 10 and a casing 2 that is connected to the casing 1. The housing 2 is connected to the housing 1 by adhesion such as adhesion or welding, or is detachably connected to the housing 1 by a connection pin.

  The housing 1 stabilizes the position of the pressure pulse wave detection unit 10 relative to the radial artery TD when the housing 20 is attached to the wrist H, and also protects the pressure pulse wave detection unit 10 including a precision element. In addition, the first rigid member having high rigidity is mainly used. For example, a resin or a metal is used as the first rigid member.

  The housing 2 is configured by a member having a second rigidity, part or all of which is lower than the first rigidity.

  Although details will be described later, for example, the housing 2 is configured by a second rigid member from the outer peripheral surface (the surface opposite to the surface facing the wrist H) to a predetermined thickness, and the other portions are the first. It is composed of a single rigid member.

  In this way, by using a member having rigidity lower than that of the casing 1 on the outer peripheral surface of the casing 2, it is possible to easily deform the casing 2 in accordance with the shape of the wrist H. For example, an elastic member, a shape memory alloy, or the like is used as the second rigid member.

  A band fastener 22 for fixing a band (not shown) for fixing the casing 20 to the wrist H is provided on the inner peripheral surface of the casing 2 (surface facing the wrist H). In the example of FIG. 1, the band fastener 22 is configured by a cylindrical metal fitting. The base end of the band is fixed to the band fastener 22.

  Holes 11 and 12 for locking the tip of the band to the housing 1 are arranged along the circumferential direction of the wrist H on the outer peripheral surface of the housing 1 (the surface opposite to the surface facing the wrist H). Is provided.

  The band is formed of a member extending along the longitudinal direction of the housing 20 (synonymous with the circumferential direction of the wrist H) and having a lower rigidity than the housing 20. For example, cloth or leather is used for this member. The band is provided with a hook-and-loop fastener for attaching a part of the band and the other part.

  In the biological information measuring apparatus of the present embodiment, in the state of FIG. 1, the person to be measured turns the tip of the band fixed to the band fastener 22 to the palm side and inserts it into the hole 12. Pull out.

  The measured person pulls the band taken out from the hole 11 toward the back side of the hand and adjusts the tightening condition, and then locks the bands to each other with a hook-and-loop fastener, thereby fixing the casing 20 to the wrist H by the band. To complete.

  A through hole 23 is provided in the housing 2 at a position adjacent to the pressure pulse wave detection unit 10 of the housing 1 in the circumferential direction of the wrist H. The through-hole 23 is sized to fit the stem projection Ta of the rib T of the measurement subject.

  In the biological information measuring apparatus according to the present embodiment, the pressure pulse wave detection sensor included in the pressure pulse wave detection unit 10 is inserted into the stalk-like protrusion Ta of the subject's rib T so that the pressure pulse wave detection sensor of the person to be measured It is positioned at a desired position above the radial artery TD. The through hole 23 functions as a positioning portion for positioning the pressure pulse wave detection sensor.

  FIG. 2 is a plan view of a portion of the casing 20 provided with the pressure pulse wave detection unit 10 and the through hole 23 of FIG. 1 as viewed from the wrist side.

  As shown in FIG. 2, the pressure pulse wave detection unit 10 includes an element row 10 a including a plurality of pressure detection elements arranged in the circumferential direction of the wrist H, and a plurality of pressures arranged in the circumferential direction of the wrist H. It has a pressing surface 10c on which two element rows including an element row 10b made of detection elements are formed. The element rows 10a and 10b and the pressing surface 10c constitute a pressure pulse wave detection sensor.

  The element row 10a and the element row 10b are arranged side by side with a space in the direction orthogonal to the circumferential direction of the wrist H. The pressure pulse wave detection unit 10 is built in the housing 1 such that the pressing surface 10 c is exposed from the housing 1.

  The pressure pulse wave detection unit 10 has a mechanism for pressing the pressing surface 10c from above the wrist skin to the radial artery TD. Generated from the radial artery TD using the signals detected by the pressure detection elements included in the element array 10a and the pressure detection elements included in the element array 10b in a state where the pressing surface 10c is pressed against the wrist by this mechanism. Then, a pressure vibration wave transmitted to the skin, that is, a pressure pulse wave is detected.

  The pressure pulse wave detection unit 10 presses the pressing surface 10c against the wrist H with an optimal pressing force for deforming a part of the radial artery TD flatly. Since there are two element rows on the pressing surface 10c, it is possible to increase the possibility that a pressure pulse wave from a flattened portion of the radial artery TD can be detected, compared to the case where there is one element row, Pressure pulse wave detection accuracy can be improved.

  Further, the pressure pulse wave detection accuracy can be further improved by allowing the pressing surface 10c to be inclined so that the output of the pressure detection element is increased.

  In the plan view of FIG. 2, a through hole 23 is provided on the left side of the pressing surface 10 c in the circumferential direction of the wrist H. In the example of FIG. 2, the shape of the through hole 23 in a plan view is a substantially square shape, and the size is 1 cm × 1 cm to 3 cm × 3 cm. By setting the size to this level, the function as the positioning portion can be sufficiently obtained.

  In a plan view of FIG. 2, a distance L (from the end of the through hole 23 on the side of the pressing surface 10 c in the circumferential direction of the wrist H to the end of the pressing surface 10 c on the side of the through hole 23 in the circumferential direction of the wrist H ( The distance in the circumferential direction between the through-hole 23 and the pressure pulse wave detection sensor is preferably set to 1 cm or less, for example, so that the through-hole 23 functions as a positioning portion for any person to be measured.

  By setting the distance L as described above, in the state in which the stalks Ta of almost all the subjects are fitted in the through holes 23, the vicinity of the center in the circumferential direction of each of the element rows 10a and 10b is It is possible to position the subject to be above the radial artery TD of the subject.

  Since the vicinity of the center in the circumferential direction of the element rows 10a and 10b is located above the radial artery TD of the measurement subject, a pressure pulse wave having a large signal level can be detected by the element rows 10a and 10b. Measurement accuracy can be increased.

  The value of the distance L can determine an optimum range by simulating the wrist shape of the measurement subject and the position / shape of the radial artery with a number of patterns.

  The through hole 23 has a quadrangular prism shape in the example of FIGS. 1 and 2, but may have any shape as long as it can fit the stem-like protrusion Ta, and the shape of the hole is not particularly limited. For example, it may be cylindrical.

  Further, the through-hole 23 may have a tapered shape that becomes narrower from the inner peripheral surface (surface on the side in contact with the wrist) of the housing 20 toward the outer peripheral surface. By doing in this way, the intensity | strength by the outer peripheral surface side of the housing | casing 20 can be made high, and durability of an apparatus can be improved.

  As shown in FIGS. 1 and 2, the inner wall of the through-hole 23 is provided with a mark 21 for guiding the position of the stem projection Ta of the rib T.

  The marks 21 are provided on each of two inner walls arranged in the circumferential direction of the wrist H among the four inner walls of the through hole 23 in the plan view of FIG. As shown in FIG. 1, the mark 21 is constituted by a thick line extending from the inner peripheral surface of the housing 2 toward the outer peripheral surface.

  This line may be formed by providing a convex portion on the inner wall of the through hole 23, may be formed by cutting the inner wall of the through hole 23, or may be formed by printing.

  In the plan view of FIG. 2, the position of each mark 21 in the direction orthogonal to the circumferential direction of the wrist H is between the element row 10a and the element row 10b of the pressure pulse wave detector 10 (in the example of FIG. 2, the element row 10a And in the middle of the element row 10b).

  The condition of the position of the stem projection Ta in the through hole 23 in the simulation for determining the value of the distance L is set so that the center of the stem projection Ta is between the two marks 21. When the conditions are set in this way, the person to be measured can easily obtain a state close to the simulation conditions by aligning the position of his / her own stem-like protrusion Ta with the mark 21. Therefore, the pressure pulse wave detection sensor can be accurately positioned.

  In FIG. 2, the position of the mark 21 in the direction orthogonal to the circumferential direction of the wrist H is set between the element row 10a and the element row 10b. This is because the radial artery TD is substantially parallel to the orthogonal direction at the wrist portion overlapping the pressing surface 10c due to the presence of the stem-like protrusion Ta of the radial T at the same position as the mark 21 in the orthogonal direction. This is because the pressure pulse wave detection accuracy can be improved.

  In addition, by making the position of the mark 21 coincide with the middle of the element row 10a and the element row 10b, this state can be further easily obtained, and the pressure pulse wave detection accuracy can be further improved.

  FIG. 3 is a schematic diagram of a circumferential cross section of the wrist H passing through the through hole 23 of the housing 20 shown in FIG. 1. In FIG. 3, illustration of the holes 11 and 12 and the band fastener 22 is omitted.

  As shown in FIG. 3, the housing 2 includes a sub housing 2 b made of the same member as the housing 1 (first housing) and a sub housing made of a member having rigidity lower than that of the housing 1. The body 2a (second housing) is connected to the body 2a. For example, an elastic member, a shape memory alloy, or the like is used for the sub housing 2a.

  Of the inner peripheral surface of the housing 2, a portion from the distal end portion (open end portion of the ulna S) to a portion in front of the through hole 23 is a sub housing 2 b, and the remaining portion is a sub housing 2 a. .

  Thus, the housing | casing 2 is comprised by the sub housing | casing 2a whose outer peripheral surface has low rigidity. For this reason, it is easy to deform the housing 2 in accordance with the shape of the wrist H.

  The casing 2 is configured by a highly rigid sub-casing 2b on the inner peripheral surface. For this reason, the case 20 can be stabilized when the case 20 is wound around the wrist.

  Moreover, in the housing | casing 2, the part in which the through-hole 23 is formed is comprised by the sub housing | casing 2a. That is, the inner wall of the through hole 23 and the portion around the through hole 23 on the inner peripheral surface of the housing 2 are made of a material softer than the housing 1 and the sub housing 2b.

  For this reason, in a state where the stem-like protrusion Ta of the rib T is fitted in the through-hole 23, a soft feel can be given to the wrist portion around the stem-like protrusion Ta, and the wearing feeling of the device can be improved. .

  FIG. 4 is a diagram for explaining a method of attaching the housing 20 to the wrist. In FIG. 4, illustration of components for fixing the casing 20 such as a band is omitted.

  The person to be measured performs the work of fitting the stem-like protrusion Ta into the through hole 23 with the vicinity of the apex of the stem-like protrusion Ta of the rib T aligned with the position of the mark 21. When the stem-like protrusion Ta is fitted into the through hole 23 by this work, the pressing surface 10c is automatically positioned at a desired position above the radial artery TD. In this state, the person to be measured fixes the casing 20 to the wrist with a band (not shown) and completes the wearing of the biological information measuring device.

  As described above, according to the biological information measuring apparatus of the present embodiment, the pressure pulse wave detection sensor detects the pressure pulse wave with high accuracy by a simple operation of simply fitting the stem-like protrusion Ta into the through hole 23. Can be positioned at a possible position. Since this operation can be easily performed even by a non-medical worker, it is possible to solve problems that could not be solved by the prior art.

  In addition, according to the biological information measuring apparatus of the present embodiment, it is possible to easily determine in which part of the through-hole 23 the stem-like protrusion Ta should be arranged by the mark 21. For this reason, it is possible to reliably obtain a state in which a high-accuracy pressure pulse wave can be detected, regardless of who is wearing it.

  Moreover, according to the biological information measuring device of this embodiment, since the stem-like protrusion Ta of the rib T fits into the through hole 23, the casing 20 does not float from the wrist, and the wrist of the casing 20 is moved to. It is possible to improve the adhesion. As a result, it is possible to prevent the displacement of the pressure pulse wave detection sensor after the device is mounted and maintain the detection accuracy of the pressure pulse wave.

  Moreover, according to the biological information measuring device of this embodiment, the contact surface with the wrist is reduced by the through-hole 23, so moisture due to sweat or the like can be released and the device can be used comfortably.

  Moreover, according to the biological information measuring device of this embodiment, since the housing | casing 20 can be clamp | tightened with a band from the state which fitted and stabilized the stem-like processus | protrusion Ta in the through-hole 23, mounting | wearing can be performed smoothly. it can.

  Up to this point, the pressure pulse wave detection sensor is positioned by the through hole 23, but the positioning portion need not be a through hole. For example, it is good also considering a recessed part or a notch part as a positioning part instead of a through-hole.

  FIG. 5 is a cross-sectional view corresponding to FIG. 3 of 20A which is a modified example of the housing 20.

  The case 20A has the same configuration as the case 20 except that the through hole 23 is changed to the recess 23A and the sub case 2a is made of a transparent material.

  The recess 23 </ b> A is provided in a portion of the sub casing 2 a on the inner peripheral surface of the casing 2. The size and shape of the recess 23A in the plan view seen from the wrist side of the connecting portion of the housing 1 and the housing 2 of the housing 20A are the same as those of the through hole 23 shown in FIG.

  Similar to the through hole 23, a mark 21 for guiding the position of the stalk-like projection Ta is provided on the side wall of the recess 23A.

  According to the housing 20A, as with the through hole 23, the pressure pulse wave detection sensor can detect the pressure pulse wave with high accuracy by a simple operation of simply fitting the stem-like protrusion Ta into the recess 23A. Can be positioned.

  Further, in the housing 20A, a portion from the bottom surface 23Ab of the recess 23A to the outer peripheral surface of the housing 2 is transparent. For this reason, the mark 21 provided on the side wall of the recess 23 </ b> A can be visually recognized from the outer peripheral side of the housing 2. Therefore, as in the case 20, accurate positioning using the mark 21 is possible.

  Further, according to the housing 20 </ b> A, the rigidity on the outer peripheral side of the housing 2 can be made higher than that of the housing 20. For this reason, durability of an apparatus can be improved.

  In the case 20A, the stem-like protrusion Ta hits the bottom surface 23Ab of the recess 23A. However, since the bottom surface 23Ab is made of a soft material, the wearing feeling is not impaired.

  Also in the housing 20 </ b> A, the recess 23 </ b> A may have a tapered shape that narrows from the inner peripheral surface of the housing 20 toward the outer peripheral surface. By doing in this way, the intensity | strength of the outer peripheral surface side of 20 A of housing | casings can further be ensured, and durability of an apparatus can be improved.

  FIG. 6 is a perspective view corresponding to FIG. 1 of a housing 20 </ b> B that is a modified example of the housing 20.

  The casing 20B shown in FIG. 6 has the same configuration as the casing 20 except that the through hole 23 provided in the sub casing 2a is changed to a notch 23B. The cutout portion 23B is a portion in which a part of the sub housing 2a is cut out. Similar to the through hole 23, a mark 21 is provided on the side wall of the notch 23B.

  According to the housing 20B, similarly to the through hole 23, the pressure pulse wave detection sensor can detect the pressure pulse wave with high accuracy by a simple operation of fitting the stem-like protrusion Ta into the notch 23B. Can be positioned at any position. In addition, accurate positioning using the mark 21 is also possible.

  The housing 20 in FIG. 1 can increase the rigidity of the housing 2 as compared with the housing 20B in FIG. For this reason, durability of an apparatus can be improved.

  The mark 21 provided in the positioning portion including the through hole 23, the concave portion 23A, and the notch portion 23B may be provided on the side wall in the direction orthogonal to the circumferential direction of the wrist H.

  Moreover, when positioning by the recessed part 23A, you may provide a mark with a dot mark etc. in the outer peripheral surface of the housing | casing 2 in the back side of bottom 23Ab of the recessed part 23A. In this case, the pressure pulse wave detection sensor can be positioned optimally by aligning the stem-like protrusion Ta with the dot mark.

  In the casings 20, 20A, 20B, the pressure pulse wave detection sensor may be one in which only one of the element array 10a and the element array 10b is formed on the pressing surface 10c. Alternatively, one pressure detection element may be formed on the pressing surface 10c.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  As described above, the following items are disclosed in this specification.

  The disclosed pressure pulse wave detection device includes a housing that houses a pressure pulse wave detection sensor that detects a pressure pulse wave from the radial artery of the wrist of the measurement subject, and the pressure pulse wave detection sensor that is provided in the housing. A positioning portion for positioning the positioning portion, wherein the positioning portion and the pressure pulse wave detection sensor are arranged side by side in a circumferential direction of a wrist, and the positioning portion faces a wrist in the casing. The pressure pulse wave detection is performed by a recess provided in the surface, a through hole provided in the housing, or a notch provided in the housing, and fitted into a stem-like protrusion of the measurement subject's rib. The sensor is positioned above the radial artery of the measurement subject.

  In the disclosed pressure pulse wave detection device, the positioning portion is the concave portion, and a portion from the bottom surface of the concave portion to the outer periphery of the casing is transparent.

  The disclosed pressure pulse wave detection device includes one in which the positioning portion is the through hole or the notch.

  In the disclosed pressure pulse wave detection device, the case includes a first case that houses the pressure pulse wave detection sensor, and a second case that is less rigid than the first case. The positioning portion is provided in the second casing.

  In the disclosed pressure pulse wave detection device, a mark for guiding the position of the styloid process of the rib is provided in the recess, the through hole, or the notch.

  In the disclosed pressure pulse wave detection device, the pressure pulse wave detection sensor has a configuration in which two element arrays in which a plurality of pressure detection elements are arranged in the circumferential direction of the wrist are arranged in a direction orthogonal to the circumferential direction. The positions of the marks in the orthogonal direction include those located between the two element rows.

  In the disclosed pressure pulse wave detection device, the position of the mark in the orthogonal direction coincides with the middle of the two element rows.

  In the disclosed pressure pulse wave detection device, the distance in the circumferential direction between the positioning unit and the pressure pulse wave detection sensor in a plan view of the positioning unit and the pressure pulse wave detection sensor from the wrist side is 1 cm. Includes the following:

DESCRIPTION OF SYMBOLS 10 Pressure pulse wave detection part 10a, 10b Pressure detection element row | line | column 10c Press surface 11,12 Hole part 20 Housing | casing 21 Mark 22 Band fastener 23 Through-hole (positioning part)
23A Concave part (positioning part)
23B Notch (positioning part)
T Radius Ta Stemoid S Ulna TD Radial artery H Wrist

Claims (8)

A housing that houses a pressure pulse wave detection sensor that detects a pressure pulse wave from the radial artery of the wrist of the measurement subject;
A positioning portion provided in the housing for positioning the pressure pulse wave detection sensor,
The positioning part and the pressure pulse wave detection sensor are arranged side by side in the circumferential direction of the wrist,
The positioning portion includes a concave portion provided on a surface of the housing facing the wrist, a through-hole provided in the housing, or a notch provided in the housing, and includes a rib stalk of the measurement subject. A pressure pulse wave detection device for positioning the pressure pulse wave detection sensor above the radial artery of the person to be measured by being fitted into a protrusion. The pressure pulse wave detection device according to claim 1,
The positioning portion is the recess;
A pressure pulse wave detection device in which a portion from a bottom surface of the recess to an outer periphery of the housing is transparent. The pressure pulse wave detection device according to claim 1,
The pressure pulse wave detection device, wherein the positioning part is the through hole or the notch. The pressure pulse wave detection device according to any one of claims 1 to 3,
The housing includes a first housing that houses the pressure pulse wave detection sensor, and a second housing that is less rigid than the first housing,
The positioning portion is a pressure pulse wave detection device provided in the second casing. The pressure pulse wave detection device according to claim 1,
A pressure pulse wave detection device in which a mark for guiding a position of a stalk-like projection of a rib is provided in the recess, the through hole, or the notch. The pressure pulse wave detection device according to claim 5,
The pressure pulse wave detection sensor has a configuration in which two element arrays in which a plurality of pressure detection elements are arranged in the circumferential direction of the wrist are arranged in a direction orthogonal to the circumferential direction,
The position of the mark in the orthogonal direction is a pressure pulse wave detection device between the two element rows. The pressure pulse wave detection device according to claim 6,
The pressure pulse wave detecting device in which the position of the mark in the orthogonal direction coincides with the middle of the two element rows. The pressure pulse wave detection device according to any one of claims 1 to 7,
The pressure pulse wave detection device, wherein a distance in the circumferential direction between the positioning unit and the pressure pulse wave detection sensor in a plan view of the positioning unit and the pressure pulse wave detection sensor from the wrist side is 1 cm or less.

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