JP3007747B2 - Pulse wave detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse wave detecting device provided with a pulse wave sensor for pressing a radial artery and maintaining a constant wrist posture when detecting a pressure pulse wave by the pulse wave sensor. is there.

[0002]

2. Description of the Related Art When detecting a pressure pulse wave generated from a radial artery by a pulse wave sensor pressing on a radial artery on the surface of a wrist of a living body, a pulse wave detection for keeping a constant bending angle of the wrist is performed. Armrests are known. For example, Japanese Utility Model Application No. 2-1 previously filed by the applicant and published.
That is what is described in JP09603. In the armrest described in this publication, the forearm and the hand are each fixed to the holding member by a band to maintain the posture of the wrist, and the bending angle of the wrist can be adjusted to detect the pressure pulse wave. The accuracy can be improved.

[0003]

However, even if the bending angle of the wrist is adjusted by using the armrest as described in the above publication, it is still difficult to say that sufficient detection accuracy of the pressure pulse wave can be obtained. was there. That is, in the pulse wave detection device, usually, the above-mentioned pulse wave sensor is provided so as to be able to protrude in a container-like housing that opens in one direction, and the pulse wave sensor is located on the radial artery on the surface of the wrist. After positioning the housing in advance as described above, the positioning position of the housing is fixed by winding and tightening a band etc. around the wrist,
It is not always easy to tighten a band etc. on the wrist so that the positioning position of the housing does not shift,
It has been difficult to reliably prevent the displacement of the positioning position of the housing. Further, simply by tightening a band or the like on the wrist, the mounting state of the housing is relatively unstable, and it has not been possible to reliably prevent the mounting position of the housing from being shifted due to external force or body movement applied to the housing. If the housing is displaced in this way, the pulse wave sensor may be displaced from a suitable position on the radial artery, and the detection accuracy of the pressure pulse wave may be impaired.

In addition, as described above, it is relatively troublesome to tighten a band or the like on a wrist while taking care not to shift the positioning position of the housing.

In the conventional armrest described in the above-mentioned publication, fixing means such as a band for fixing the forearm and the hand for maintaining the bending angle of the wrist are separately provided on the forearm and the hand. Therefore, there is a disadvantage that the operation of maintaining the bending angle of the wrist is relatively troublesome and time-consuming.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to detect a pressure pulse wave by a pulse wave sensor while maintaining a constant wrist bending angle. And the displacement of the pulse wave sensor with respect to the wrist surface can be more reliably prevented, so that the detection accuracy of the pressure pulse wave can be further improved. It is an object of the present invention to provide a pulse wave detection device which does not require a troublesome mounting operation for fixing a sensor positioning position with a band or the like, and can perform an operation for maintaining a wrist bending angle more easily and quickly.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its gist is to provide a pulse wave sensor for pressing a radial artery on the surface of a wrist of a living body. A pulse wave detection device that holds the wrist bending angle constant in an adjustable state when detecting a pressure pulse wave generated from the radial artery by the pulse wave sensor,
(a) The hand is provided above a longitudinal mounting portion for mounting the forearm of the living body and a portion located on one end side of the mounting portion and is brought into contact with the palm of the living body. An armrest including a restraining portion for restraining the movement of the mounting portion, and a support portion erected on the side in the width direction of the mounting portion and supporting the restraining portion; (C) a first movable member movably provided in a direction parallel to the longitudinal direction;
The first movable member is provided so as to be movable at a right angle to the placing portion and in a direction along the placing portion, and the pulse wave sensor is attached so as to face the surface of the wrist. 2 movable member; (d) a pressing device provided on the second movable member, for pressing the pulse wave sensor against the surface of the wrist; and (e) the first movable member and the second movable member according to manual operation. A movable member position fixing device for fixing the wrist at a desired moving position; and (f) a bending angle of the wrist that is provided in the placing section, by adjusting a position of the wrist in a direction approaching and separating from the second movable member. And (g) an arm fixing device provided at the other end of the placing portion for fixing the forearm to the placing portion.

[0008]

In the pulse wave detecting device having such a configuration, for example, the forearm is placed on the placing portion of the armrest, and the palm is placed on the restricting portion provided above the portion located at one end of the placing portion. The movement of the hand is restricted by the contact, and in a state where the second movable member is opposed to the surface of the wrist, the forearm is attached to the mounting portion by the arm fixing device provided on the other end side of the mounting portion. Fixed. Next, the bending angle of the wrist is adjusted by adjusting the position of the wrist in the direction approaching and separating from the second movable member by the wrist bending angle adjusting device provided on the mounting portion, and the first movable member is adjusted. By adjusting the moving position of the second movable member with respect to the first movable member, the pulse wave sensor provided on the first movable member is positioned on the radial artery. Then, the positioning position of the pulse wave sensor is fixed by manually fixing the first movable member and the second movable member to the desired moving positions by the movable member position fixing device. When the wave sensor is pressed onto the radial artery on the surface of the wrist, a pressure pulse wave generated from the radial artery is detected. Note that the bending angle of the wrist may be adjusted based on the detected pressure pulse wave so that a more suitable pressure pulse wave is detected.

[0009]

Therefore, according to the pulse wave detecting device of the present invention, when the pressure pulse wave generated from the radial artery is detected by the pulse wave sensor, the bending angle of the wrist is adjusted to a desired angle by the wrist bending angle adjusting device. Can be adjusted. Further, the pulse wave sensor is attached to a second movable member provided on the armrest so as to be movable substantially along the wrist surface, and suitably positions the pulse wave sensor on the radial artery based on the movement of the second movable member. In addition, the positioning position of the pulse wave sensor can be fixed by fixing the moving positions of the first movable member and the second movable member by the movable member position fixing device. The troublesome work of mounting the pulse wave sensor positioned at the position by using a band or the like while maintaining the positioning position is not required, and the positioning position of the pulse wave sensor at the time of mounting by the band or the like is completely eliminated. At the same time, the displacement of the pulse wave sensor due to an external force, body movement, or the like can be more reliably prevented as compared with the related art. In addition, since the bending angle of the wrist can be adjusted and the displacement of the pulse wave sensor with respect to the wrist surface can be more reliably prevented, the detection accuracy of the pressure pulse wave can be further improved.

In addition, since the movement of the hand can be restrained only by bringing the palm into contact with the restraining part, the work of restraining the hand with a band or the like as in the prior art is not required. Can be performed more easily and quickly.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing an example of a pulse wave detecting device according to the present invention, and FIG. 2 is a diagram showing a state of use thereof.
1 and 2, reference numeral 10 denotes an armrest.
The armrest 10 has a long plate-like shape, and the plate thickness is reduced toward the center in the width direction so that the mounting surface 14 is formed in a curved surface shape in which one surface 12 is depressed with a predetermined radius of curvature over the entire length in the longitudinal direction. The mounting portion 1 is erected on the width direction side portion of a portion located on one end side in the longitudinal direction of the one surface 12 of the mounting portion 14.
The supporting portion 16 includes a supporting portion 16 that curves outwardly of the supporting member 4, and a restraining portion 18 provided at a front end of the supporting portion 16 so as to face the one surface 12 of the mounting portion 14 at a predetermined interval. At the end (right end in FIGS. 1 and 2) of the restraining portion 18 opposite to the other end of the mounting portion 14, a hemispherical portion 20 protruding toward the one surface 12 of the mounting portion 14 is provided. Have been.

On one surface 12 of the mounting portion 14, a plate-like member 22 having a length shorter than the mounting portion 14 by a predetermined dimension is provided on the other end side (left end side in FIG. 2) of the mounting portion 14. It is fixed by a fixing means such as a bolt (not shown) at the portion where it is located. The plate-like member 22 is made of spring steel having a relatively high spring constant, and has a free end formed by projecting in one direction in the plate thickness direction to form the mounting portion 14.
A pressing portion 24 is provided at a position further away from the one surface 12. On the plate member 22, an arm pad 28 in which a rubber bag 26 is filled with, for example, a gel substance (not shown) is provided.

The mounting portion 14 further includes a male screw member 30 having a male screw portion 30 and a head portion 32 having a larger diameter than the male screw portion 30.
The male screw portion 30 protrudes from the one surface 12 of the mounting portion 14 by a predetermined size, and the head portion 32 is embedded in a bottomed hole 38 formed on the other flat surface 36 side of the mounting portion 14 and has the head portion 32.
Is mounted so as to be rotatable around the axis and swingable at a predetermined angle in a state in which it is prevented from falling out of the bottomed hole 38. It is screwed with the formed female screw hole 40. Also,
1 and 2, a plate-shaped and arc-shaped restraining member 46 having a band 44 having a fastener 42 fixed to one end is provided on the widthwise side surface of a portion located on the left end side in FIGS. 1 and 2. A fastener 48 that is rotatably attached at the other end and that is detachably adhered to the fastener 42 is provided on a side surface of the mounting portion 14 opposite to the side on which the restraining member 46 is attached. ing. Reference numeral 50 indicated by a dashed line is a handle used when rotating the male screw member 34. The handle 50 is always folded down so that the handle 50 is accommodated in a recess (not shown) provided in the head 32. Has become.

The armrest 10 constructed as described above
, The forearm 52 of the living body is placed on the arm pad 28 on the one surface 12 of the
Is positioned on the pressing portion 24 of the plate member 22, and the palm 57 of the hand 56 of the living body is
In a state where the hand 56 is in contact with the holding member 46, the binding member 46 is put on the forearm 52, and the fastener 42 of the band 44 provided on the binding member 46 is adhered to the fastener 48 of the mounting portion 14. Restrained and the forearm 52 is fixed,
Thereby, the wrist 54 is held at a predetermined bending angle.
Then, in this state, the handle 50 is raised to raise the male screw member 3.
By rotating the arm 4 around the axis, the wrist 54 is moved in the vertical direction via the arm pad 28 by the pressing portion 24 of the plate member 22, and the bending angle of the wrist 54 can be adjusted. ing. Therefore, in this embodiment, the plate member 22 and the male screw member 3
4 and the like constitute a wrist bending angle adjusting device,
2, the band 44, the restraining member 46, and the fastener 48 constitute an arm fixing device.

Here, in the present embodiment, a first movable member 58 is mounted on an end of the restraining portion 18 opposite to the hemispherical portion 20 side in such a manner as to protrude from the end by a predetermined amount. The first movable member 58 is provided with a second movable member 60 that is perpendicular to the longitudinal direction of the mounting portion 14 and is mounted on the first movable member 58 so as to be movable in a direction parallel to the longitudinal direction of the mounting portion 14. 14 is provided so as to be movable in a direction parallel to the other surface 36. That is, as shown in FIG. 3, a hole 62 having a rectangular cross section is formed in an end of the restraining portion 18 opposite to the hemispherical portion 20 side, and the hole 62 projects into a pair of opposing wall surfaces. A pair of elongated guide projections 64 are provided on a pair of guide grooves 6 provided on both side surfaces of the first movable member 58.
6, the first movable member 58 can be moved while being guided by the guide protrusion 64 and the guide groove 66. Also, as shown in FIG. 2, the upper and lower side surfaces of the portion located on the protruding end side of the first movable member 58 are perpendicular to the moving direction of the first movable member 58 and have other positions. A pair of guide grooves 68 extending in a direction parallel to the surface 36 is provided, and a pair of guide protrusions 70 provided on the second movable member 60 are fitted into the two guide grooves 68, thereby forming the second movable member 60. Is the guide groove 6
8 and the guide projection 70 to be moved while being guided. Thereby, the second movable member 60
Via the first movable member 58, it is possible to move in a direction parallel to the longitudinal direction of the mounting portion 14 and in a direction perpendicular to the longitudinal direction of the mounting portion 14 and parallel to the other surface 36 of the mounting portion 14. The second movable member 60 is mounted on the other surface 3 of the mounting portion 14.
It can be moved to a desired position in a plane parallel to 6.

As shown in FIG. 5, the surface of the second movable member 60 facing the mounting portion 14 is opposed to the tip of a tongue-shaped projection 72 projecting from the first movable member 58. , A pulse wave sensor 76 is mounted via an inflatable rubber air bag 74. In the air bag 74, for example,
Pressure air is supplied from an air pump (not shown) via a pressure regulating valve.
6 is pushed out and pressed onto the body surface 78 of the wrist 54. In this embodiment, the air bag 7
4 constitutes a pressing device.

On the pressing surface 80 of the pulse wave sensor 76, for example, an actual application 1-
As described in JP-A-122704, a plurality of pressure detecting elements (not shown) are arranged in one direction (the moving direction of the second movable member 60) with a slight space therebetween.
The pulse wave sensor 76 is pressed against the body surface 78 so that the arrangement direction of the pressure detection elements crosses the radial artery,
A pressure vibration wave, ie, a pressure pulse wave, generated from a radial artery (not shown) and transmitted to the body surface 78 is detected, and a pulse wave signal representing the pressure pulse wave is output to a control device (not shown).

The control device includes, for example, a microcomputer, and outputs a drive signal to the pressure regulating valve to adjust the pressure in the air bladder 74. Based on the pulse wave signals sequentially obtained from the elements, the pressure of the air bladder 74 at which the amplitude of the pressure pulse wave is maximum, that is, the optimal pressing force of the pulse wave sensor 76 is determined, and the pressure detection is performed by detecting the pressure pulse wave having the maximum amplitude. The element is determined as the optimum pressure detecting element, and a pressure pulse wave sequentially detected by the optimum pressure detecting element is displayed on a display while holding the element at the optimum pressing force, or the blood pressure is determined based on the pressure pulse wave. Monitor values.

Inside the first movable member 58 and the second movable member 60, a device for fixing them at a desired moving position is provided.

That is, in the first movable member 58, FIG.
As shown in FIG. 7, a first fixing member 86 having a shallow bottomed cylindrical portion 82 and a pin portion 84 protruding from the center of the bottom outer surface is provided, and the pin portion of the first fixing member 86 is provided. 84 is brought into contact with the inner surface of the hole 62 of the restraining portion 18 through a through hole 88 provided in the first movable member 58, and between the first fixed member 86 and the first movable member 58. Is provided with a compression coil spring 90 that constantly urges the first fixing member 86 in a direction in which the pin portion 84 is pressed against the inner surface of the hole 62 of the restraining portion 18. Accordingly, the moving position of the first movable member 58 is fixed based on the frictional resistance between the pin portion 84 and the inner surface of the restraining portion 18 due to the urging force of the compression coil spring 90.

On the other hand, a second fixed member 96 having a bottomed cylindrical portion 92 and a pin portion 94 is provided in the second movable member 60 as shown in FIG. The first movable member 58 passes through the through hole 98 of the movable member 60.
The pin 94 is pressed by the tongue-shaped protrusion 72 between the second fixed member 96 and the second movable member 60. A compression coil spring 100 that constantly urges the second fixing member 96 in the direction is provided. Thus, the second movable member 60 is formed based on the frictional resistance between the pin portion 94 and the surface of the tongue-shaped protrusion 72 by the urging force of the compression coil spring 100.
The moving position of is fixed. Note that a tapered outer peripheral surface 102 is provided between the outer peripheral surface of the bottomed cylindrical portion 92 and the outer peripheral surface of the pin portion 94. In the present embodiment, the tongue-shaped protrusion 72, the first fixing member 86,
The compression coil springs 90 and 100, the second fixing member 96, and the like constitute a movable member position fixing device.

Inside the first movable member 58 and the second movable member 60, in order to release the fixing of the moving positions of the two movable members 58, 60, the release of the lock as shown in FIGS. An apparatus 104 is provided. The fixing release device 104 includes a first member 106 and a second member 108. The first member 106 and the second member 108 are different from each other except that the formation positions of the inclined surface 120 described later with respect to the stepped surface 110 are different. They are configured similarly. That is, the first member 106 and the second member 108 have a pair of stepped surfaces 110 that are formed at positions facing each other in the radial direction by gradually changing the wall thickness in the circumferential direction and that are inclined in one circumferential direction. Ring-shaped plate part 1 having on one side
And an arm portion 11 which protrudes substantially tangentially from the outer peripheral edge of the ring-shaped plate portion 112 and has a knob 114 at the tip.
6 are provided. First member 106
The ring-shaped plate portion 112 of the second member 108 is formed such that the pair of stepped surfaces 110 substantially overlap each other, and the bottom of the bottomed cylindrical portion 82 of the first fixed member 86 and the first movable member 58 The pin portions 84 of the first fixing member 86 are inserted through the inner peripheral sides of the two ring-shaped portions 112. Thereby, the first member 106 and the second member 108
Are provided so as to be rotatable around the pin portion 84 in a state where the both arm portions 116 are separated from each other by a predetermined distance in the rotation direction.
In addition, between the arm parts 116 of both members 106 and 108,
A compression coil spring 118 is provided, which constantly urges them in a direction separating from each other.

The surface of the first member 106 located on the side of the knob 114 of the arm 116 is opposite to the stepped surface 110 and the step of the portion of the second member 108 located on the side of the arm 114 of the arm 116. The surfaces on the side of the attachment surface 110 are provided with inclined surfaces 120 which are inclined so that the thickness of the arm portions 116 becomes thinner as they approach each other, and which can be taperedly engaged with the tapered outer peripheral surface 102 of the second fixing member 96. Have been. Arm portion 116 of first member 106 and second member 108
The second movable member 60 on both sides of the second fixed member 96.
And the inclined surface 1 of both arm portions 116
20 are taperedly engaged with the tapered outer peripheral surface 102 of the second fixing member 96 so as to be sandwiched from opposite sides. The first member 106 and the second member 108
The end of the arm 116 on the side of the knob 114 is inserted into an opening 122 (see FIG. 1) provided in the first movable member 58, and the knob 114 of both arms 116 is As shown in (2), it is located outside the second movable member 60.

The first member 106 and the second member 108
The two members 106 and 108 are pressed by pressing the knobs 114 in the direction of approaching each other, so that the compression coil spring 1
When the members are rotated in a direction approaching each other against the urging force of 18, the ring-shaped plate portions 112 of both members 106 and 108 are rotated in directions opposite to each other, and the stepped surfaces 110 of both ring-shaped portions 112 are rotated. As a result, the ring-shaped plate portions 112 of both members 106 and 108 are separated from each other by a predetermined amount against the urging force of the compression coil spring 90, as shown in FIG. As a result, the distal end surface of the pin portion 84 of the first fixing member 86 is separated from the inner surface of the hole 62 of the restraining portion 18, so that the fixed state of the first movable member 58 is released, and movement with respect to the restraining portion 18 is allowed. State.
When the members 106 and 108 are rotated in a direction approaching each other, the second fixing member 96 is moved by the action of the inclined surface 120 of the both arm portions 116 and the tapered outer peripheral surface 102 of the second fixing member 96. 4, the distal end surface of the pin portion 94 of the second fixed member 96 is separated from the surface of the tongue-shaped projection 72 of the first movable member 58, so that the second movable member 60 is fixed. Is released, and the state in which the movement with respect to the first movable member 58 is permitted. That is, only by pressing the pair of knobs 114 of the fixing release device 104, the first movable member 58 is fixed to the restricting portion 18 and the second movable member 60 is moved to the first movable member 58.
Is released at the same time.

Then, as described above, the armrest 1
On the body surface 78 of the wrist 54 held at a predetermined angle at 0, a pair of knobs 114 of the fixing release device 104 are pressed to adjust the moving positions of the first movable member 58 and the second movable member 60. After the pulse wave sensor 76 attached to the first movable member 58 is positioned at a suitable position on the radial artery on the body surface 78 and then the operating force on the both resections 114 is released, the moving positions of the two movable members 58 and 60 and The positioning position of pulse wave sensor 76 is fixed. In this state, the detection of the pressure pulse wave by the pulse wave sensor 76 is performed as described above. At this time, while observing the displayed pressure pulse wave, a pressure pulse wave having a larger amplitude can be obtained. The fine adjustment of the bending angle of the wrist 54 by the male screw member 34 may be performed.

As described above, according to the pulse wave detecting device of the present embodiment, when the pulse wave sensor 76 detects a pressure pulse wave generated from the radial artery, the bending angle of the wrist 54 is determined by rotating the male screw member 34. The angle can be adjusted. In addition, the pulse wave sensor 76
The pulse wave sensor 76 is attached to a second movable member 60 movably provided substantially along the body surface 78 of the fourth and moves the pulse wave sensor 76 to a suitable position on the radial artery based on the movement of the second movable member 60. And the frictional resistance between the pin portion 84 of the first fixing member 86 and the restraining portion 18 and the second fixing member 96
The position of the pulse wave sensor 76 is determined by fixing the moving positions of the first movable member 58 and the second movable member 60 based on the frictional resistance between the pin 94 and the tongue-shaped protrusion 72 of the first movable member 58. Since the position can be fixed, the pulse wave sensor positioned on the radial artery on the surface of the wrist as in the related art does not require the troublesome work of mounting it with a band or the like while maintaining the positioning position, and the conventional conventional As described above, the displacement of the positioning position of the pulse wave sensor when worn with a band or the like is completely eliminated, and the displacement of the pulse wave sensor 76 due to an external force, body movement, or the like can be more reliably prevented as compared with the related art. In addition, since the bending angle of the wrist 54 can be adjusted and the displacement of the pulse wave sensor 76 with respect to the body surface 78 can be more reliably prevented,
The detection accuracy of the pressure pulse wave can be further improved as compared with the related art.

Further, according to the present embodiment, the movement of the hand 56 can be restrained only by abutting the palm 57 on the hemispherical portion 20 of the restraining portion 18, so that the hand 56 can be Therefore, the operation of maintaining the bending angle of the wrist 54 can be performed more easily and quickly.

According to this embodiment, since the palm 57 is brought into contact with the hemispherical portion 20 of the restraining portion 18, it is possible to restrain the movement of the palm 57 while maintaining the rounded natural state of the palm 57. Therefore, there is an advantage that the burden on the living body can be reduced.

Further, according to the present embodiment, the fixing releasing device 1
By simply pressing the pair of knobs 114 in the direction of approach to each other, the fixed state of the first movable member 58 and the second movable member 60 is simultaneously released, and the body surface 78 of the pulse wave sensor 76 is released.
The positioning of the pulse wave sensor 76 can be freely performed, and the positioning position of the pulse wave sensor 76 is fixed only by releasing the operation force on the knob 114 after the positioning of the pulse wave sensor 76. There is an advantage that the positioning operation of 76 and the operation of fixing the positioning position can be easily performed.

According to this embodiment, the restraining portion 18 is provided on one side of the mounting portion 14 in the width direction.
6, the forearm 52 to the hand 56 can be easily positioned at predetermined positions on the armrest 10 from the side opposite to the supporting portion 16 of the mounting portion 14.

Further, according to the present embodiment, the arm fixing device for fixing the forearm 52 to the mounting portion 14 includes the plate-shaped and arc-shaped restraining member 46, so that only the band is used. The fixed state of the forearm 52 can be more appropriately secured than in the case of fixing.

While the embodiment of the present invention has been described with reference to the drawings, the present invention can be applied to other embodiments.

For example, in the above-described embodiment, the restraining portion 18 is supported in a cantilever manner on one side in the width direction of the mounting portion 14, but this is not always necessary. May be configured to be supported.

In the above embodiment, the first movable member 58
And the movable position of the second movable member 60 can be fixed at the same time, and the fixing of the movable position can be simultaneously released. However, the fixing of the movable members 58 and 60 and the release of the fixation are performed separately. It may be.

Further, in the above embodiment, the wrist bending angle adjusting device is constituted by the plate member 22 and the male screw member 34, but is not necessarily required. It may be constituted by a rubber air bag interposed therebetween and supplied with pressurized air.

In the above embodiment, the arm fixing device has the plate-shaped and arc-shaped restraining member 46.
The band 44 may be elongated without providing the restraining member 46.

In the above embodiment, the forearm 52 is placed on the plate member 22 via the arm pad 28 formed by filling the rubber bag 26 with a gel substance.
For example, the rubber bag 26 may be filled with air, or a sponge rubber sheet may be provided instead of the arm pad 28.

In the above embodiment, the first fixing member 86
The movable position of the first movable member 58 is fixed based on the frictional resistance between the distal end surface of the pin portion 84 and the inner surface of the hole 62 of the restraining portion 18, and the distal end surface of the pin portion 94 of the second fixed member 96 and the second movable member 58 are fixed. Although the moving position of the second movable member 60 is configured to be fixed based on the frictional resistance between the first movable member 58 and the surface of the tongue-shaped protrusion 72, this is not always necessary.
For example, a plurality of locking teeth extending in a direction parallel to the moving direction of the second movable member 60 are provided on the distal end surface of the pin portion 84 of the first fixing member 86 along the moving direction of the first movable member 58, and the hooking teeth are provided. A number of latching teeth engageable with the latching teeth are provided along the moving direction of the first movable member 58 on the inner surface of the hole 62 of the restraining portion 18, and the latching teeth are formed on the distal end surface of the pin portion 94 of the second fixing member 96. A plurality of locking teeth extending in a direction parallel to the moving direction of the first movable member 58 are provided along the moving direction of the second movable member 60, and a large number of locking teeth engageable with these locking teeth are provided in the first movable member. The second movable member 60 is provided on the surface of the tongue-shaped protrusion 72 of the member 58.
The moving positions of the movable members 58 and 60 may be fixed based on the engagement of the engaging teeth.

In the above-described embodiment, the palm 57 is brought into contact with the hemispherical portion 20 of the restraining portion 18. However, this is not always necessary. A cylindrical portion or a columnar portion extending in a substantially parallel direction may be provided in the constraint portion, and the cylindrical portion or the columnar portion may be gripped by the hand 56.

In the above embodiment, the pulse wave sensor 7
After the pulse wave sensor 76 is pressed against the body surface 78 with a predetermined pressing force without determining the optimum pressing force of 6, the position of the wrist 54 in the direction of approaching and separating from the pulse wave sensor 76 by the male screw member 34 is determined. By adjusting the pulse wave sensor 76
Can be adjusted so that a pressure pulse wave having a larger amplitude can be detected.

In the above embodiment, the pulse wave sensor 76 having a plurality of pressure detecting elements is provided. However, a pulse wave sensor having one pressure detecting element may be provided.

The above is merely an example of the present invention, and the present invention can be variously modified without departing from the spirit thereof.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a pulse wave detection device according to the present invention.

FIG. 2 is a diagram showing a use state of the pulse wave detection device of FIG. 1, with a part cut away.

FIG. 3 is an enlarged view of a section taken along line III-III in FIG.

FIG. 4 is an enlarged view of a section taken along line IV-IV in FIG. 2;

FIG. 5 is an enlarged view of a cross section taken along line VV in FIG. 2;

FIG. 6 is a view showing a fixing release device for releasing the fixing of the moving position of the first movable member and the second movable member in FIGS. 1 and 2;

FIG. 7 is an enlarged view of a section taken along line VII-VII in FIG.

8 is a view showing a pair of ring-shaped parts in a state where the pair of arm parts of the fixing release device of FIG. 6 are rotated in a direction approaching each other, and is a view corresponding to FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Armrest 14 Placement part 16 Supporting part 18 Restriction part # 22 Plate-shaped member, 34 Male screw member {Wrist bending angle adjustment device # 42 Fastener, 44 Band, 46 Restriction member, 4
Reference Signs List 8 fastener｝ arm fixing device 52 forearm 54 wrist 56 hand 57 palm 58 first movable member 60 second movable member 74 air bag (pressing device) 76 pulse wave sensor 78 body surface ｛72 tongue-shaped protrusion, 86 first fixed Member, 90, 1
00 compression coil spring, 96 2nd fixed member｝ movable member position fixing device

Claims (1)

(57) [Claims] 1. A pulse wave sensor for pressing a radial artery on a surface of a wrist of a living body, and a bending angle of the wrist can be adjusted when detecting a pressure pulse wave generated from the radial artery by the pulse wave sensor. A pulse wave detection device that keeps a constant state in a stable state, a longitudinal mounting portion for mounting the forearm of the living body, provided above a portion located at one end side of the mounting portion, An armrest including a restraining portion that restrains the movement of the hand by being brought into contact with the palm of the living body, and a supporting portion that stands upright on the width direction side portion of the mounting portion and supports the restraining portion; A first movable member provided on the restraining portion so as to be movable in a direction parallel to a longitudinal direction of the placing portion; and the placing portion being perpendicular to the longitudinal direction of the placing portion and being placed on the first movable member. Is provided so as to be movable in a direction along the front of the wrist so as to face the surface of the wrist. A second movable member having a pulse wave sensor attached thereto, a pressing device provided on the second movable member and pressing the pulse wave sensor against the surface of the wrist, the first movable member and the second movable member being manually operated. A movable member position fixing device for fixing the movable member at a desired moving position; and a bending angle of the wrist provided on the placement section, by adjusting a position of the wrist in a direction approaching and separating from the second movable member. And a wrist bending angle adjusting device for adjusting the wrist angle, and an arm fixing device provided at the other end of the placing portion for fixing the forearm to the placing portion.