JP2006288638A - Blood pressure measuring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blood pressure measuring apparatus provided with a cuff mounting structure capable of stably measuring a blood pressure while suppressing an invasion degree low even at the tragus. <P>SOLUTION: The mounting part 3 of the blood pressure measuring apparatus 1 is provided with an inner side cuff 6, an outer side cuff 7 and a holding member 10 for holding them, and the holding member is U-shaped. Then, the holding member 10 is constituted of a first holding member for holding the outer side cuff 7, a second holding member for holding the inner side cuff 6 and a main holding member to which the first and second holding members are attached. The first holding member and the second holding member (support member 85) are joined to the main holding member so as to be turned. Further, in the case that the first holding member and the second holding member (support member 85) are at a stationary position without being turned, the first holding member and the support member 85 are roughly parallel at the holding member 10 and the inner side cuff 6 and the outer side cuff 7 face each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a blood pressure measurement device, and more particularly to a technique in which an outer ear and its peripheral portion are measured parts.

  The blood pressure fluctuates every moment according to changes in the external environment and internal environment. For this reason, it would be ideal if the beats could be recorded continuously, but even if they could not be recorded continuously, the blood pressure in the day was measured continuously (intermittently) to measure the change in blood pressure over time. It is also important to perform health care by measuring.

  When blood pressure is regularly measured with a conventional blood pressure measurement device, for example, the blood pressure is measured by wrapping a cuff around the upper arm of the subject. In this case, it is necessary to wear on the body a large-sized cuff that covers the upper arm and the main body of the blood pressure measurement device connected to the cuff.

  For this reason, when blood pressure is regularly measured with the blood pressure measurement device, the subject wears a cuff on the upper arm and the body of the blood pressure measurement device connected to the cuff is worn on the body. This needs to be sent, but this is a major obstacle to daily life. In addition, the subject may be burdened by feeling pain because the upper arm is compressed each time pressure is measured.

Considering this point, there is a method of measuring a pulse wave by attaching a cuff to the earlobe and pressing the earlobe (Patent Document 1). According to this, the cuff and the main body can be made smaller than the sphygmomanometer that measures the blood pressure by wearing the cuff on the upper arm, and the burden on the subject can be reduced.
JP 2005-6906 A

  However, even if the pulse wave and blood pressure are measured with the earlobe, the blood vessels of the earlobe are very thin and it is difficult to measure blood pressure stably and accurately. In particular, the blood vessels of the earlobe contract when the outside air temperature is lowered, and it becomes more difficult to measure stably.

  Therefore, it is considered that blood pressure, which is relatively close to the upper arm, can be stably measured by attaching a cuff to a tragus with a larger blood vessel than the earlobe and measuring the blood pressure.

  However, the earlobe is soft and relatively large and exposed, and the cuff is easy to wear. However, since the tragus is relatively hard and the shape varies greatly, the structure of the ear tab wearing cuff disclosed in Patent Document 1 is used. It cannot be used for tragus as it is. That is, even if the structure of the mounting portion disclosed in Patent Document 1 is used, it is difficult to stably obtain the blood pressure measurement result in the tragus. Moreover, there is a risk that the degree of invasiveness to the subject will increase if it is forced to wear.

  The present invention has been made in view of such a situation, and provides a blood pressure measurement device having a cuff attachment structure capable of measuring blood pressure stably even in a tragus while keeping the degree of invasiveness low. .

  In order to solve the above-described problems, a blood pressure measurement device according to the present invention includes an inner cuff inserted into the ear hole, an outer cuff positioned outside the tragus, and holding means for holding the inner cuff and the outer cuff. And a pulse wave detecting means built in at least one of the inner cuff or the outer cuff and detecting a pulse wave signal from blood flowing through a blood vessel, and after holding the tragus between the inner cuff and the outer cuff, Pressurizing and depressurizing means for pressurizing and depressurizing the inner cuff and the outer cuff with a fluid, piping connected between the inner cuff, the outer cuff and the pressurizing and depressurizing means for sending the fluid, and the piping Pressure detecting means for detecting the pressure of the inner cuff and the outer cuff, a pressure value detected by the pressure detecting means when pressurizing each cuff, and the pulse wave signal by the pulse wave detecting means And the best from A blood pressure measurement control means for measuring a pressure value, and measuring a minimum blood pressure value from a pressure value detected by the pressure detection means and the pulse wave signal by the pressure detection means at the time of depressurization of each cuff, One end of the holding means is open, a first holding member that holds the outer cuff, a second holding member that holds the inner cuff, and a main holding member to which the first and second holding members are attached. The first holding member and the second holding member are joined to the main holding member so as to rotate, and the first and second holding members do not rotate and are stationary. When in the position, the holding means is substantially parallel to the first and second holding members, and the inner cuff and the outer cuff face each other.

  Further, at least one of the first and second holding members in the holding means can be expanded and contracted with a predetermined width so that the opposing positions of the inner cuff and the outer cuff can be offset relatively. It has become.

  Furthermore, a clamping width adjusting mechanism for adjusting a clamping width between the outer cuff and the inner cuff is provided, and the clamping width adjusting mechanism increases the clamping width while maintaining the opposing state of the outer cuff and the inner cuff. Adjust. The clamping width adjusting mechanism is preferably a screw mechanism or a brushing bush mechanism. The outer cuff is attached to the clamping width adjusting mechanism, and preferably, the outer cuff is attached to the clamping width adjusting mechanism so as to swing. The swing structure is desirably a structure that is fixed to the clamping width adjusting mechanism by a ball bearing.

  Further, the side surfaces of the outer cuff and the inner cuff other than the contact surface that directly contact the tragus are configured as bellows, and the number of bellows of the outer cuff and the inner cuff is the same. And

  Furthermore, a cushion portion for reducing a burden on the user due to a part of the ear being pressed is attached to a portion of the second holding member to which the inner cuff is attached.

  The outer cuff and the inner cuff have different cross-sectional shapes. Preferably, the outer cuff has a substantially circular cross-sectional shape, and the inner cuff has a substantially elliptical or oval cross-sectional shape.

  Further features of the present invention will become apparent from the best mode for carrying out the present invention and the accompanying drawings.

  According to the configuration of the present invention, the cuff can be evenly contacted with the inner and outer surfaces of the tragus in a flat state, and the cuff can be accurately maintained while maintaining a position sufficiently corresponding to individual differences in the shape of the tragus. Blood pressure can be measured.

  A blood pressure measurement device according to a preferred embodiment of the present invention will be described below with reference to the drawings.

<Auricular structure>
In the blood pressure measurement device according to the present embodiment, the tragus is used as a measurement site. First, the structure of the pinna will be clarified.

  FIG. 1 is a diagram showing names of respective parts of the auricle (ear). In the auricle 220 shown in FIG. 1, 221 is a tragus, 222 is a tragus, 223 is a concha, 224 is a contusion, 225 is a conical ring, 226 is a concentric leg, 227 is a concha cavity, 230 is It is an ear hole. In the present embodiment, a pair of mounting portions described later (including the inner cuff assembly 6 and the outer cuff assembly 7) are mounted so as to sandwich the tragus 221 therebetween.

<Cuff wearing appearance>
FIG. 2 is a diagram illustrating a state when the mounting part 3 of the blood pressure measurement device 1 according to the present embodiment is mounted on the tragus 221 illustrated in FIG. 1.

  An inner cuff assembly 6 and an outer cuff assembly 7 are respectively attached to the upper and lower ends of the “U” -shaped holding member 10. Therefore, the inner cuff assembly 6 and the outer cuff assembly 7 are disposed so as to face each other. Since the width between the inner cuff assembly 6 and the outer cuff assembly 7 can be adjusted by the clamping width adjusting screw 11, when the mounting portion 3 is mounted on the tragus 221, the widths of both cuffs are adjusted. The inner cuff assembly 6 is inserted into the concha cavity 227 by making it slightly wider than the thickness of the tragus 221, and the clamping width adjusting screw 11 is tightened so that the mounting portion 3 is fixed to the tragus 221. .

  The mounting portion 3 mounted in this way is connected to the apparatus main body 2 via the pipe 4 and the wiring 5. The pipe 4 is used when air is supplied when the cuff is pressurized, or when the air inside the cuff is exhausted when the pressure is reduced. In addition, the wiring 5 is a signal line for performing transmission / reception of signals for performing each control for photoelectric pulse wave blood pressure measurement, which will be described later, between a light emitting and receiving element, which will be described later, and the apparatus body 2.

  In addition, the apparatus main body 2 may be stored in a subject's breast pocket, or may be stored in a storage portion provided on the waist.

<Configuration of mounting portion 3>
FIG. 3 shows an external configuration of the mounting portion 3. The mounting portion 3 is generally composed of a holding member 10, an inner cuff assembly 6, an outer cuff assembly 7, and a clamping width adjusting screw 11 (a clamping width adjusting mechanism).

  As shown in FIG. 3A, the holding member 10 has a “U” shape as a whole, and the first holding member to which the outer cuff assembly 7 is attached and the inner cuff assembly 6 are attached. It comprises a support member 85 and a main holding member. Here, the “U” shape means that only one end of the holding member 10 is an open end, and the first holding member and the support member 85 (the inner cuff assembly 6 is in the normal setting shown in FIG. 3A). This means that the arranged portions are substantially parallel to each other.

  A screw hole for the clamping width adjusting screw 11 is provided near the end of the first holding member to which the outer cuff assembly 7 is attached. The outer cuff assembly 7 is attached to the tip of the clamping width adjusting screw 11. By configuring the holding member 10 as described above, the inner cuff assembly 6 and the outer cuff assembly 7 are opposed to each other. When the clamping width adjusting screw 11 is turned clockwise, the clamping width is narrowed, and conversely, when the clamping width adjusting screw 11 is turned counterclockwise, the clamping width is widened.

  Further, in the holding member 10, the physical and psychological burden on the user due to the periphery of the ear wheel 224 and / or the concha 223 being pressed on the opposite side of the portion where the inner cuff assembly 6 is disposed. A cushion portion 90 is attached to alleviate this. The cushion portion 90 is made of a soft material, and for example, polyurethane or the like is suitable.

  In the mounting portion 3 according to the present embodiment, the outer cuff assembly 7 is fixed and not always opposed to the inner cuff assembly 6, but more flexibly corresponds to various shapes of the tragus 221. As shown in FIG. 3 (b), the outer cuff assembly 7 can be swung on the ball shaft by pivoting the outer cuff assembly 7 on the clamping width adjusting screw 11 with a ball bearing. It has become.

  In addition, as shown in FIG. 4, in the mounting portion 3, when the adjustment screw 83 of the first holding member joint portion 82 is loosened, the first holding member rotates with the screw 83 as a fulcrum. Further, the support member 85 that supports the inner cuff assembly 6 is also configured such that the support member 85 rotates about the screw 86 as a fulcrum by loosening the adjustment screw 86 of the main holding member joint 86. Accordingly, by tightening the adjusting screws 83 and 86 with the first holding member and the support member 85 at an angle desired by the user, the outer cuff assembly 7 faces the inner cuff assembly 6 directly in front (outer side). The cuff assembly 7 can be changed from a non-waving state to a non-opposing state. Since the positional relationship between the two cuff assemblies 6 and 7 can be subtly changed according to the user's preference in combination with the swinging structure of the outer cuff assembly 7 (see FIG. 3B), the trabe 221 can be more flexible. Can cope with individual differences. That is, since the cuff can be properly applied to the tragus 221 having various shapes, more appropriate blood pressure measurement can be performed.

  Further, as shown in FIG. 5, when the adjustment screw 83 of the holding member joining portion 82 is loosened, the mounting portion 3 enables a sliding operation of the first holding member in addition to the above-described rotation operation. The relative positional relationship in the lateral direction between the solid body 6 and the outer cuff assembly 7 can be changed. This sliding operation is realized by providing an oval screw receiver 84 for receiving the adjusting screw 83 on the main holding member. In other words, when the adjustment screw 83 is loosened, the head of the adjustment screw 83 is slidable left and right within the screw receiver 84, and is fixed at the tightened position by tightening the adjustment screw 83. Note that the support member 85 on which the inner cuff assembly 6 is disposed may be extended and retracted with a predetermined width by a similar slide mechanism. That is, it is only necessary that the opposing position can be offset relative to the inner cuff assembly 6 and the outer cuff assembly 7.

  Here, FIG. 5 shows a state where the first holding member is the shortest (the dotted line shows the normal state of FIG. 3). When the mounting portion 3 is attached to the tragus 221 in this state, the inner cuff assembly 6 can be inserted deeper into the ear hole than in the normal state. Therefore, in the normal lateral state (for example, the state shown in FIG. 3), the subject (for example, the patient) and the measurer (for example, the doctor) prefer the stability even when the mounting part 3 is worn and the feeling of wearing is not good. Accordingly, it is possible to easily determine the mounting state.

  As described above, in the present embodiment, since the holding member 10 includes the swing structure, the rotation structure, and the slide structure of the outer cuff assembly 7, it is more suitable for blood pressure measurement and more comfortable for the subject. The mounting state of the part 3 can be realized.

  Further, the contact surface 25 of the outer cuff assembly 7 has a substantially circular shape. That is, the cuff part (cuff bag body 22) constituting a part of the outer cuff assembly 7 has a substantially circular shape when viewed from the upper surface as shown in FIG. It has a two-stage bellows structure (see FIG. 6B).

  On the other hand, the contact surface 25 of the inner cuff assembly 6 is substantially elliptical. That is, the cuff part (cuff bag body 23) constituting a part of the inner cuff assembly 6 is substantially elliptical when viewed from the top as shown in FIG. Similar to the cuff bag body 22 of the cuff assembly, for example, it has a two-stage bellows structure (see FIG. 7B). Further, the direction of the major axis of the ellipse of the contact surface 25 and the direction of insertion into the concha concavity 227 coincide. This is because if the inner cuff portion is elongated along the insertion direction, the insertion into the concha cavity 227 can be performed smoothly. In fact, since the shape of the tragus 221 varies greatly among individuals, the configuration for facilitating insertion in this way is very important. As described above, the side surface of the cuff bag body 23 has a bellows structure (for example, a two-stage bellows), but it is desirable that the number of steps of the outer cuff bag body 22 and the number of steps of the inner cuff bag body 23 are aligned. This considers the balance at the time of pressurization and pressure reduction. Here, the cuff cross-sectional shape (contact surface shape) is an ellipse, but it may be an elongated shape, and may be an ellipse in addition to an ellipse.

  Further details of the configuration of the cuff bag bodies 22 and 23 forming part of the inner cuff assembly 6 and the outer cuff assembly 7 will be described below.

<Configuration of cuff bag bodies 22, 23>
6A is a plan view of the cuff bag body 22 constituting a part of the outer cuff assembly 7, FIG. 6B is a front view of the cuff bag body 22, and FIG. It is a bottom view. FIG. 7 is a sectional view taken along line XX in FIG.

  In FIG. 7, the cuff bag body 22 includes a cylindrical portion 22b that is elastically deformed between a pressurized state and a reduced pressure state, and a flat contact surface 25 that extends from the cylindrical portion 22b and contacts the tragus. And is integrally formed as a hat shape having a lid portion 22a. Further, the edge portion of the opening 28 is integrally formed as a flange portion 26. Further, by setting the first dimension t1 of the thickness of the lid portion 22a to be larger than the second dimension t2 of the thickness of the cylindrical portion 22b, the contact surface 25 is always flat with respect to the tragus. It is comprised so that it can contact.

  The lid portion 22a is formed in a circular shape, an elliptical shape, or an oval shape. Similarly, the cylindrical portion 22b is also formed in a circular cylindrical shape, an elliptical cylindrical shape, or an elliptical cylindrical shape, and the cuff member is attached to these cylindrical portions. It is formed into a matching shape.

  Further, the cylindrical portion 22b is formed as a bellows body 27 having one or more desirably two stepped portions, and when the lid portion is circular, the diameter dimension is in the range of 15 to 5 mm, desirably about 8 mm. The first dimension t1 is in the range of 0.4 to 1 mm, preferably about 0.6 mm, and the second dimension t2 is set to 0.1 to 0.8 mm, preferably about 0.3 mm. .

  Next, FIG. 8 (a) is a plan view of the cuff bag body 23, FIG. 8 (b) is a front view of the cuff bag body, FIG. 6 (c) is a right side view of the cuff bag body, and FIG. It is a bottom view of a cuff bag body. 9A is a cross-sectional view taken along line XX in FIG. 8A, and FIG. 9B is a cross-sectional view taken along line YY in FIG. 8A.

  In this figure, when the lids of the cuff bag bodies 22 and 23 are elliptical or oval, the major axis dimension is in the range of 15 to 5 mm, preferably about 10 mm, and the minor axis dimension is 10 to 4 mm. Range, preferably about 8 mm.

  In FIG. 9A, the first dimension t1 is in the range of 0.4 to 1 mm, preferably about 0.6 mm, and the second dimension t2 is 0.1 to 0.8 mm, preferably about 0.1 mm. Set to 3 mm.

  Further, the cuff bag bodies 22 and 23 are integrally formed from an elastic material having a Shore hardness of 30 to 60, preferably about 50, including silicon rubber, natural rubber, and a predetermined synthetic resin.

  As described above, the first dimension t1 of the thickness of the cap portions of the cap-shaped cuff bag bodies 22 and 23 having the flat contact surface that contacts the tragus 221 is set to the thickness of the tube portion. By making it larger than the second dimension t2, at the time of pressurization, the contact surface 25 can move to the pressurization position while maintaining the flat state. Further, the contact surface 25 can be moved to the decompression position while maintaining the flat state even during decompression. Further, by forming the cylindrical portion of the cuff bag body in the bellows body (bellows structure) 27, the contact surface 25 can be moved substantially in parallel.

  In addition, by making the side surfaces of the cuff bag bodies 22 and 23 into a bellows structure in this way, when the cuff is pressurized, the contact surfaces 25 of the cuff bag bodies 22 and 23 are inflated into a dome shape by the air pressure and come into contact with each other. It is possible to prevent the pressing force of the surface 25 from becoming uneven. That is, the air pressure unnecessary for uniformly pressing the tragus 221 is absorbed by the bellows, and the contact surface 25 can be kept flat.

<Attaching the outer cuff assembly 7>
The swing structure of the mounting portion 3 shown in FIG. 3B is realized by pivoting the outer cuff assembly 7 to the clamping width adjusting screw 11 with the ball bearing portion 11a as shown in FIG. I try to do it.

<Configuration of fitting member and assembly method>
As shown in FIG. 10, the cuff bag bodies 22 and 23 can be configured to withstand pressurization and decompression by fixing them in an airtight state with respect to the cuff member using an O-ring 24. It is difficult to make the state because both the cuff bag bodies 22, 23 and the O-ring are elastic bodies. Therefore, it is preferable to improve the airtightness and the assembly workability by snapping the cuff bag body to the cuff member using the fitting member.

  FIG. 11A is an exploded view showing how the cuff bag bodies 22 and 23 are attached to the cuff member 30, and FIG. 11B is a cross-sectional view of the main part of the cuff assembly after completion.

  In this figure, the same reference numerals are given to the components or parts already described, and the description thereof is omitted. First, the LED 20 and the phototransistor 21 indicated by broken lines are accurately fixed at predetermined positions in the sensor assembly 31. The lead wire extends downward as shown in the figure, and is connected to the wiring 5. The cuff member 30 is injection-molded using a resin material, and is provided with an attachment base 30d of the sensor assembly 31, and the periphery of the base 30d communicates with the flow path 30a. The flow path 30a is formed as a hollow part of the pipe part 30b, and the pipe 4 is connected to the pipe part 30b as shown in the figure.

  The cuff member 30 is formed with an outer peripheral surface 35 that matches the size of the small-diameter portion 44a of the inner peripheral surface 44 of the cuff bag bodies 22 and 23, or has a slightly larger size, and a flange 33 is formed below the outer peripheral surface 35. It is formed as shown in the figure, and a groove 34 serving as one locking portion is formed below the flange 33.

  Further, a flange portion 26 is integrally formed outward from the edge portion of the opening portion 28 of the cuff bag bodies 22 and 23.

  On the other hand, in the fitting member 38, the other locking portion 38d that locks against one locking portion formed on the cuff member 30 is formed at the end of the inclined surface 38c, and the flange portion 26 is pressed. The pressing surface 38a is integrally formed.

  In the above configuration, after the cuff bag bodies 22 and 23 are first moved in the arrow direction with respect to the cuff member 30, the inner peripheral surface 44a is press-fitted into the outer peripheral surface 35 or lightly inserted, and then the fitting member 38 is moved. Next, when the press fitting is performed, the flange portion 26 is fixed in a compressed state by the fitting member 38 as shown in FIG.

  Since it can be completed as described above, pressurization and decompression can be performed through the flow path 30a. Further, in FIG. 11B, the inner peripheral surface 30c of the cuff member 30 has a larger dimensional relationship than the outer peripheral surface of the sensor assembly 31 as shown in the figure, so that pressure and pressure reduction can be performed through these gaps. It becomes. Further, in FIG. 11B, since the small substrate 41 connected to the lead wire of each element is provided, the wiring work can be simplified.

  Next, FIG. 12 is a cross-sectional view of a main part of a cuff assembly according to another embodiment. In this figure, components or components already described are denoted by the same reference numerals and description thereof is omitted. After 31 is inserted from below the through hole 30 f formed in the cuff member 30, the edge of the small substrate 41 is fitted to the claw 30 k of the cuff member 30 and fixed in an immobile state. In addition, the fitting member 38 is configured such that a part of the inner peripheral surface has a mountain shape and can be fitted into a valley portion of the cuff member. Further, a sealing agent 42 is laid on the joint surface between the flange portion and the cuff member 30 to ensure further airtightness.

  According to the configuration shown in FIG. 12, the inside of the cuff bag body 22 is pressurized, so that the bellows portion 27 extends so that the contact surface 25 can move in parallel from the position shown by the solid line to the position shown by the broken line. When the inside is depressurized, it can return to the position indicated by the solid line again.

  As described above, when blood pressure is measured periodically and at regular intervals using the upper arm and fingers, various problems occur. The blood pressure can be measured accurately.

<Cuff bag body with light-shielding layer>
If the LED element 20 for optically detecting the pulse wave and the phototransistor 21 are built in the cuff as described above, a part of the cuff is attached when the inner and outer cuffs are attached to the tragus. It will be exposed to the outside. For this reason, it is affected by disturbance light, and it is difficult to measure blood pressure accurately under the usage condition where it goes out outdoors and is directly exposed to sunlight including ultraviolet rays, even if it does not cause much trouble indoors.

  FIG. 13A is a cross-sectional view of the main part of the cuff assembly before light-shielding measures, and FIG. 13B is a cross-sectional view of the main part of the cuff assembly before light-shielding measures.

  In this figure, the same reference numerals are given to the components or parts already described, and the description is omitted. The cuff bag bodies 22 and 23 include transparent or light transmissive silicon rubber, natural rubber, and a predetermined synthetic resin. It is integrally formed from an elastic material having a Shore hardness of 30 to 60, preferably about 50. The cuff bag bodies 22 and 23 are provided in an airtight state with respect to the cuff member as described above. As shown in FIG. 13A, the contact surface 25 is positioned between a position indicated by a solid line and a position indicated by a broken line. It is elastically deformed between a pressurized state and a reduced pressure state that are substantially translated between each other.

  If comprised in this way, since the cuff bag bodies 22 and 23 are transparent, translucent, or light-transmitting, the disturbance light L will approach inside. For this reason, when using a sensor highly sensitive to sunlight, it is affected by sunlight, and accurate blood pressure measurement cannot be performed.

  Therefore, as shown in FIG. 13B, a light shielding layer 45 for optically shielding the cuff bag body 22 other than the opening 46 is formed, and this light shielding layer 45 is continuously provided up to the inner wall surface 44 of the cylindrical portion. By forming, the disturbance light L is prevented from entering the interior as shown in the figure, the light is irradiated only to the blood pressure measurement site, and the reflected light is received so that accurate blood pressure measurement is always performed regardless of the place. I can do it. The shading layer 45 can be prevented from being worn during use by being formed inside as shown in the figure. Needless to say, the shading layer 45 may be formed outside if abrasion resistance can be ensured.

  Further, when the cuff bag lid portion 22a is circular as described with reference to FIG. 7, the shape of the opening 46 of the light shielding layer 45 is formed as a similar small circle. On the other hand, when the contact surface 25 is formed in an elliptical shape or an oval shape as described with reference to FIG. 8, the opening 46 of the light shielding layer 45 is an elliptical shape or an oval shape having a small circular shape or a similar shape. A good shape.

  When the contact surface 25 has a diameter (D1) in the range of 15 to 5 mm, preferably about 8 mm, the diameter of the opening 46 is set in the range of 2 to 8 mm, preferably about 5 mm. The Rukoto. Also, the abutment surface 25 has an elliptical shape in which the major axis dimension (D2) is in the range of 15 to 5 mm, preferably about 10 mm, and the minor axis dimension (D1) is in the range of 10 to 4 mm, preferably about 8 mm. In the case of an oval shape, the diameter of the opening 46 is set in a range of 2 to 8 mm, desirably a circle of about 5 mm, or a circle, an ellipse or an oval having an opening area equivalent to this circle. . The light shielding layer 45 provided with the openings 46 can be formed by, for example, a two-color injection molding method.

  FIG. 14 is a printing process diagram for forming a light shielding layer inside the cuff bag body 22, and is shown together with a central sectional view of the cuff bag body 22.

  In this figure, in step S1, it is molded by a rubber molding device, the appearance of the cuff bag body 22 after deburring is inspected, defective products are removed and non-defective products are selected, and the product is set on a coating tray (not shown). In the next step S <b> 2, after degreasing, it is confirmed that no foreign matter is mixed, and a masking sheet 70 having a shape and area corresponding to the opening 46 and having an adhesive surface having a light adhesive force is attached to the cuff bag body 22. Affix to the center on the back of the part. At this time, a jig may be used for positioning.

  Thus, the preparation for applying the silicon-based binder paint mixed with the pigment containing carbon black is completed, and the process proceeds to step S3 to perform the ink application process.

  In this step, the light-shielding layer 45 shown by a broken line is formed by applying the above-mentioned binder paint with a brush or a spray gun. At this stage, since it has not been sufficiently dried, it is left for about 1 hour in the room temperature drying process of the next step S4, and after the drying is promoted, the masking 70 is removed using a tool such as tweezers.

  Then, it progresses to step S5, the cuff bag body after drying is put into an oven apparatus, and the oven process for baking coating is performed at about 200 degreeC for about 10 to 15 minutes. Thereafter, the coating tray is taken out from the oven apparatus, and in the finishing inspection process in step S6, an appearance inspection is performed, and foreign matter, protrusion of paint to the opening 46, coating unevenness, etc. are inspected, and a good product is obtained. Select and finish.

  The cuff bag body 22 completed through each of the above steps is attached and used as shown in FIG.

  In addition, although the above is an example of the process of forming the light shielding layer inside the cuff bag body, a substantially similar process may be used when the light shielding layer is formed outside the cuff bag body. Furthermore, the above two-color injection molding method eliminates the need for the above-mentioned coating process, but since the molding die is complicated and expensive, it is determined which method should be adopted in view of the quantity of cuff production. It will be.

<Another configuration example of the clamping width adjusting mechanism different from the clamping width adjusting screw 11>
As described above, the clamping width adjusting screw 11 is formed by, for example, screwing a male screw portion formed on the outer peripheral surface of the main body of the adjusting screw 11 into a female screw hole formed in the holding member 10 as illustrated. The outer cuff assembly provided with the cuff bag body 23 can be arbitrarily moved by rotating the adjustment screw 11 in the forward / reverse direction, and the ball bearing portion 11a integrally formed at the end portion of the adjustment screw 11 is attached to the cuff member 30. By press-fitting into the fitting hole 47, it is provided so as to be swingable (see FIG. 9).
However, for example, when the movement stroke of the outer cuff assembly is large, the rotation operation of the adjusting screw 11 may be troublesome for a short-minded person or a person who has difficulty with fingertips. Therefore, the brushing bush 49, which is a one-way moving member that allows the outer cuff assembly to move to a desired position at once, regardless of the moving stroke of the outer cuff assembly, can be used instead of the adjusting screw 11.

  That is, in FIG. 15, a brushing bush 49, which is a one-way moving member, has a plurality of elastically deformable flange portions 49b on its outer peripheral surface, and a ball bearing portion 49a at its end portion made of a predetermined nylon resin material. Are integrally molded. The diameter of the flange 49 b is set to be larger than the inner diameter of the hole 15 a formed at the other end of the third holding member 15. For this purpose, when the brushing bush 49 is inserted into the hole 15a in one direction in the direction of the arrow, the three flanges 49b are obliquely deformed so as to oppose the insertion direction as shown in the figure, and the hole 15a is elastically deformed. It will be in the state contact | abutted with respect to the inner peripheral surface. In this state, the outer cuff assembly can be held. Moreover, it is comprised so that the stopper part not shown can contact | abut to the edge part of the hole 15a, and can be pulled out to the original position by pulling with a bigger force than the time of insertion. The brushing bush 49 has a structure close to that of a so-called one-touch fastener.

<Integrated configuration of piping 4 and wiring 5>
Next, in FIG. 1, the piping 4 and the wiring 5 are provided separately, but this is inconvenient because they are entangled with each other in use. On the other hand, the pipe 4 is formed so that a hollow portion serving as a flow path for a fluid containing air is formed along the longitudinal direction, so that the wiring 5 is not exposed to the outside by passing the wiring 5 through the hollow portion. can do. However, when configured in this way, a seal portion for securing airtightness is required at the site where the wiring 5 is pulled out of the pipe 4, but since the pipe 4 is bent freely, it is difficult to ensure the sealing performance, and the long term Leave a problem with endurance. In addition, the assembly work will be hindered.

  In view of this, various studies have been made on configurations that can simultaneously improve the sealing performance and increase the working efficiency when the pipe 4 and the wiring 5 are integrated.

  As a result of the examination, the wirings 5 and 5 are laid along the longitudinal direction on the outer peripheral surface of the pipe 4 as shown in the perspective view of FIG. 16, and the wirings 5 and 5 and the pipe 4 are expanded and contracted. It was concluded that it is best to cover and integrate with the covering member 9 having the property.

  Specifically, the wiring 5 connected to the light emitting element and the light receiving element is stranded wires 5a and 5b connected from the light emitting element and the light receiving element, respectively, and the pipe 4 is made of silicon rubber, natural rubber, It is formed into a hollow shape as shown in the figure using an elastic material containing a predetermined synthetic resin, and the covering member 9 is formed in a mesh shape from a fibrous body having a predetermined count. Further, the covering member 9 is subjected to a metal coating process for improving noise resistance, and further covered with a cover (not shown).

  When the pipe 4 and the wiring 5 are integrated as described above, for example, when one of them is gripped in FIG. 15, it can be freely bent in an arc indicated by a one-dot chain line. Furthermore, since the wiring 5 can be directly drawn out from the outer peripheral surface of the pipe 4 as shown in FIGS. 13A and 13B, no seal member is required. Moreover, when metal processing is given to the covering member 9, noise resistance can be further improved.

  As described above, when blood pressure is measured periodically and at regular intervals using the upper arm and fingers, various problems occur. The blood pressure can be measured accurately.

  Thus, in order to continuously and accurately measure blood pressure with a blood pressure measurement device using the tragus as a blood pressure measurement site, pressurized air is sent to each cuff by a battery-driven pressure pump. If a driven pressurizing pump is used, the battery is consumed very much, so that measurement over a long period of time becomes impossible. Therefore, a manual pressurizing pump may be used. The fluid medium to be pressurized includes various fluids. In the case of a gas, there is air, and in the case of a liquid, there are water, fats and oils including silicon oil, alcohol, and the like, which are appropriately selected.

<Circuit configuration of photoelectric volume pulse wave sphygmomanometer>
FIG. 17 is a block diagram showing the configuration of the operation circuit 100 in the apparatus main body 2 when the ear sphygmomanometer 1 of FIG. 1 is configured as a photoelectric volume pulse wave sphygmomanometer. In FIG. 17, inside an inner cuff (assembly) 6 of the mounting portion 3 to be mounted on the tragus 221, an LED 20 which is a light emitting element constituting a photoelectric sensor (pulse wave sensor) and a phototransistor 21 which is a light receiving element. It is included. As described above, the pipe 4 is a rubber tube (air tube) and forms a flow path of air into the inner cuff 6. The pressure pump 108 uses an electric small motor as a drive source, sends compressed air into the condenser tank 107, and sends pressurized air into the inner cuff assembly 6 after rectification. Further, the quick exhaust valve 104 branched and connected from the pipe 4 is provided with an electromagnetic valve mechanism (not shown), and rapidly reduces the pressure in the inner cuff assembly 6. Further, the fine exhaust valve 105 branched and connected similarly reduces the pressure in the inner cuff assembly 6 at a constant speed (for example, 2 to 3 mmHg / sec). Further, the pressure sensor 106 branched from the pipe 4 changes the electrical parameter according to the pressure in the cuff 6. A pressure detection amplifier (AMP) 107 connected to the pressure sensor 106 detects an electrical parameter of the pressure sensor 106, converts it into an electrical signal, amplifies it, and outputs an analog cuff pressure signal P. .

  The LED 20 irradiates light to the pulsating vascular blood flow, and the phototransistor 21 detects reflected light from the vascular blood flow. The filter AMP 109 connected via the wiring 5 is a pulse wave detection amplifier, which amplifies the output signal of the phototransistor 21 and outputs an analog pulse wave signal M. Here, the LED 20 is connected to a light amount control unit 118 that automatically changes the light amount via the wiring 5, while the pulse wave detection amplifier 109 has a gain control unit 119 a that automatically changes the gain, A time constant control unit 119b for changing the time constant of a filter amplifier (not shown) constituting the pulse wave detection filter / amplifier 109 is connected. An A / D converter (A / D) 110 connected as shown in the figure converts the analog signals M and P into digital data D.

  A control unit (CPU) 111 performs main control of the photoelectric volume pulse wave sphygmomanometer. The CPU 111 has an adjustment pressure register 111a for storing the adjustment pressure. Details of this control will be described later according to the flowchart of FIG. 18 and the operation waveform diagram of FIG.

  The ROM 112 stores a later-described control program executed by the CPU 111. The RAM 113 includes a data memory, an image memory, and the like. A liquid crystal display (LCD) 114 displays the contents of the image memory. The operation unit 116 is used when a measurement start command, an adjustment pressure value, or the like is set by a user operation. The buzzer 115 informs the user that the device has sensed that the key in the operation unit 116 has been pressed, the measurement has been completed, and the like. In this example, the adjustment pressure register 111 a is provided in the CPU 111, but an adjustment pressure storage unit may be provided in the RAM 113.

  Further, the display panel 14 of the LCD uses a dot matrix type display panel, so that various information (for example, characters, figures, signal waveforms, etc.) can be displayed. The operation unit 116 has a measurement start switch (ST) and keys for inputting a cuff pressure value and the like. Further, a power supply unit 121 and a power switch (not shown) that can replace the battery are further provided.

  Further, the apparatus main body 2 is provided with an external communication unit connected to a connector (not shown) or a mobile phone, and by connecting to the personal computer, an operation control parameter setting unit, a data clear unit, a data storage unit, Various data can be exchanged between them and blood pressure measurement results can be saved.

  FIG. 18 is a diagram showing the actual arrangement of the apparatus main body 2 of FIG. 2 with the lid removed. In this figure, the same reference numerals are given to the components or parts already described, and the description is omitted. The apparatus body 2 has a vertical dimension of about 120 mm, a width dimension of about 80 mm, and a thickness dimension of 27 mm. The weight is 180 grams. In this way, by making it as small and light as possible, even if it is always carried, it does not interfere with daily life.

  In addition, the electronic components that control each control described above are mounted on a substrate 140 having a mounting area that occupies the internal space. On the other hand, the pressure pump 108, the condenser tank 107, the fine exhaust valve 105, and the quick exhaust valve 104 are connected to the integrally formed pipe 4 as described above, and have a mutual arrangement relationship as shown in the figure. The power supply unit 121 of four AAA batteries, which can be exchanged, can be provided. In this way, the limited internal space can be effectively used. In addition, rechargeable secondary batteries that can be used repeatedly and commercially available AAA batteries can be easily replaced by opening and closing a lid (not shown).

<Operation of photoelectric volume pulse wave sphygmomanometer>
Next, the operation of the ear sphygmomanometer 1 as the photoelectric volume pulse wave sphygmomanometer according to the present embodiment will be described below. FIG. 19 is a flowchart for explaining a measurement process of the ear sphygmomanometer (photoelectric volume pulse wave sphygmomanometer) 1. In this figure, when the apparatus is turned on by a power switch, self-initial diagnosis processing (not shown) is first performed to initialize the apparatus. Thereafter, the process is started by pressing the measurement start switch.

  In step S101, the cuff pressure P is read, and in step S102, it is determined whether or not the residual pressure of the cuff 1 is within a specified value. If the residual pressure exceeds the specified value, “residual pressure error” is displayed on the LCD 114 in step S123. If the residual pressure is within the specified value, a cuff pressure value (for example, a value larger than the maximum blood pressure value of 120 to 210 mmHg) is set using the operation unit 118 in step S103, and the light amount and gain are set to predetermined values in step S104. Set to value.

  When the setting of the pressurization value and the light quantity / gain is completed, the quick exhaust valve 104 and the fine exhaust valve 105 are closed in steps S105 and S106. In step S107, driving of the pressure pump 3 is started and pressurization (pressure increase) is started. This is the start of the measurement process during pressurization, and the cuff pressure starts increasing at a constant speed (for example, 2 to 3 mmHg / sec). During this time, data processing by each functional block is performed in step S108, and the measurement of the minimum blood pressure and the maximum blood pressure is performed. When the maximum blood pressure is measured (S109), the drive of the pressurizing pump 103 is stopped in step S112.

  In step S110, it is determined whether or not the cuff pressure is higher than the pressure value U set in S103. If P> U, it is still in the normal measurement range, so measurement is continued. On the other hand, when P> U, the cuff pressure is already higher than the set value, so “measurement error” is displayed on the LCD 114 in step S111. If necessary, detailed information such as “signal abnormality during pressurization” is additionally displayed. In step S113, it is determined whether or not the signal level of the pulse wave signal obtained at the time of pressurization is within a predetermined level range for enabling high-precision blood pressure measurement. If it is determined that it is within the predetermined range, the measured maximum blood pressure value and minimum blood pressure value are displayed on the LCD 114 in step S120, and a tone signal is sent to the buzzer 115 in step S121.

  If it is determined in step S113 that it is not within the predetermined range, the light amount and gain are adjusted based on the signal level of the pulse wave signal in step S114. In step S114, for example, the following processing is performed. When the pulse wave carrier wave is below the standard value (20 to 40% of the full scale of the A / D converter 110), it is checked whether or not the step light amount is maximum. If not, the light amount control unit 118 is controlled. Increase the amount of light, and increase the gain when the amount of light is maximum. On the other hand, if the carrier level is equal to or higher than the standard value, it is checked whether or not the gain is minimum. If not, the gain control unit 119a performs feedback control to lower the gain. If it is minimum, decrease the light intensity.

  When the adjustment of the light amount / gain is completed, the fine exhaust valve 105 is opened in step S115. This is the start of the measurement process at the time of pressure reduction (pressure reduction), and the cuff pressure starts to decrease at a constant speed (for example, 2 to 3 mmHg / sec). During this time, data processing by each functional block is performed in step S116, and the systolic blood pressure and the diastolic blood pressure are measured. In step S117, it is determined whether or not a minimum blood pressure value is detected during decompression. If not detected, continue measurement. In step S118, it is determined whether or not the cuff pressure is lower than a predetermined value L (for example, 40 mmHg). If P <L, it is still in the normal measurement range, and the flow returns to step S116. On the other hand, when P <L, the cuff pressure is already lower than the normal measurement range, so “measurement error” is displayed on the LCD 114 in step S119. If necessary, display detailed information such as “signal anomaly during decompression”.

  When the measurement is completed in the determination in step S117, the measurement process is completed in the normal measurement range, and the maximum blood pressure value and the minimum blood pressure value measured are displayed on the LCD 14 in step S120, and the tone signal is displayed to the buzzer 115 in step S121. Send. Preferably, different tone signals are sent after normal termination and abnormal termination. In step S122, the remaining air in the cuff 6 is quickly exhausted and the next measurement start is awaited.

<Blood pressure calculation operation>
FIG. 20 is a diagram illustrating a correlation between the cuff pressure and the pulse wave signal. In this figure, the waveforms in the time from the start of measurement during pressurization (step S108) to the end of measurement during depressurization (step S116) are respectively shown.

  The blood pressure measurement is generally performed on the graph of FIG. 20 as follows. That is, in the measurement at the time of pressurization, the cuff pressure at the point (a) at which the change in the magnitude of the pulse wave signal has started is set as the minimum blood pressure, and the cuff pressure at the time point (b) when the pulse wave signal disappears is set as the maximum blood pressure. On the other hand, the blood pressure measurement at the time of decompression is opposite to the blood pressure measurement at the time of pressurization. The cuff pressure is the minimum blood pressure.

  In the present embodiment, an example in which reflected light from blood in a blood vessel is detected has been described. Alternatively, transmitted light may be detected instead.

  As described above, the photoelectric volume pulse wave sphygmomanometer according to the present embodiment makes it possible to adjust the signal level so that the signal level of the pulse wave signal is within a predetermined standard range, and at the same time enables highly accurate measurement, By making it possible to shorten the blood pressure measurement time, it is possible to provide a photoelectric volumetric pulse wave sphygmomanometer that can reduce the physical burden on the user due to the cuff pressure. In addition, since the tragus and its peripheral part are insensitive to pain, there is also an effect that pain due to cuff pressure can be reduced, and this also has an effect that it can be easily applied to continuous measurement of blood pressure. .

  The blood pressure measurement device described above detects a pulse wave using the light emitting element 20 and the light receiving element 21, but includes a cuff that compresses pressure on the tragus, and changes the pressure of the pulsation caused by the blood vessel on the living body surface with the cuff. The pulse wave can also be detected by capturing as That is, a pulsation obtained from a living body is converted into a change in pressure in the cuff by a cuff to which pressure is applied, and a pressure change in the cuff is detected by a pressure detection device. Even with such a configuration, a pulse wave of a living body can be detected. In addition, a small microphone is installed in the cuff part in contact with the living body, Korotkoff sound generated when a part of the living body is compressed with the cuff is detected, and blood pressure is measured based on the occurrence or disappearance of the Korotkoff sound above a predetermined level You may make it do.

<Other embodiments>
In the above-described embodiment, as shown in FIG. 17, light is applied to the blood flow of the blood vessel only on one side (inside the inner cuff assembly 6) of the pair of cuffs having a configuration that sandwiches the tragus 221. An irradiation part (LED 20) and a light receiving part (phototransistor 21) for detecting reflected light from the bloodstream are provided.

  FIG. 21 is a block diagram illustrating a configuration example of an ear sphygmomanometer 1 as a photoelectric volume pulse wave sphygmomanometer according to another embodiment. In this figure, the same reference numerals are given to the components or parts already described, and the description thereof is omitted. When both the inner cuff assembly 6 and the outer assembly 7 for sandwiching the tragus 221 are disposed, LEDs 20a and 20a and phototransistors 21a and 21b serving as light receiving portions for detecting reflected light are incorporated.

  Thus, a sensor may be provided in the inner and outer cuffs so that the blood pressure on the back side and front side of the tragus can be measured simultaneously. With this configuration, the cuff on one side compresses the blood vessels (arterioles) on the back side of the outer ear and its peripheral part, and the cuff on the other side has a superficial temporal artery on the front side of the outer ear and its peripheral part or The branch vessel can be compressed.

  FIG. 22 is a diagram showing a blood pressure measurement result by simultaneous measurement of the inner and outer cuffs. As shown in the figure, as the pressurization curve W1 is decreased, the pulse wave signal K1 of the inner cuff 6 changes and the pulse wave signal K2 of the outer cuff 7 changes. As shown in the figure, the amplitude of the pulse wave signal K1 starts to change greatly at a point earlier than the waveform of the pulse wave signal K2. By using both of the pulse wave signals that change in this way, it is possible to measure the systolic blood pressure and the diastolic blood pressure with higher accuracy.

  In addition, there are the following reasons for measuring the blood pressure of the outer ear and its peripheral part (more specifically, the tragus and the peripheral part) in this way.

  That is, it is known that the tragus and its surrounding blood vessels (arterioles) are close to blood vessels in the brain, and it is thought that changes in blood pressure originating in the brain can be measured. On the other hand, in addition to blood vessels (arterioles) present in the cartilage portion (mainly tragus) of the ear, an artery (superficial temporal artery) directly connected to the heart is also located in the vicinity of the tragus. Therefore, there is an advantage that blood pressure having different information (that is, blood pressure derived from the brain and blood pressure derived from the heart) can be measured simultaneously with a small device in the periphery of the tragus. The photoelectric volume pulse wave sphygmomanometer of the present embodiment makes it possible to set the signal level of the pulse wave signal so that it falls within a predetermined standard range, and it is possible to measure blood pressure with high accuracy in the outer ear periphery. At the same time, by making it possible to shorten the blood pressure measurement time, it is possible to reduce the physical burden on the user due to the cuff pressure.

It is a figure which shows the structure of an ear | edge. It is an external appearance perspective view which shows a mode that the ear-type blood pressure meter 1 which concerns on this invention was made into the use condition with respect to an auricle. It is a figure which shows the external appearance structure of the mounting part 3 of the ear-type blood pressure meter 1 which concerns on this invention. It is a figure which shows the state which opened the outer side cuff assembly 7 and the inner side cuff assembly 6 in the mounting part 3. FIG. It is a figure which shows the state which made the outer side cuff assembly 7 slide. (a) is a plan view of the cuff bag body 22, (b) is a front view of the cuff bag body, and (c) is a bottom view of the cuff bag body. FIG. 5 is a cross-sectional view taken along line XX in FIG. (a) is a plan view of the cuff bag body 23, (b) is a front view of the cuff bag body, (c) is a right side view of the cuff bag body, and (d) is a bottom view of the cuff bag body. (a) is a sectional view taken along line XX in FIG. 6 (a), and (b) is a sectional view taken along line YY in FIG. 6 (a). It is a figure which shows the ball bearing structure for implement | achieving the swing structure of the outer side cuff assembly. (A) is the exploded view which showed a mode that the cuff bag body was attached to a cuff member, (b) is principal part sectional drawing of the cuff assembly after completion. It is principal part sectional drawing of the cuff assembly of another embodiment. (a) Main part sectional drawing of the cuff assembly before light shielding measures, (b) Main part sectional view of the cuff assembly before light shielding measures. FIG. 4 is a printing process diagram for forming a light shielding layer inside the cuff bag body 22, and is a printing process diagram shown together with a central sectional view of the cuff bag body 22. It is principal part sectional drawing of the cuff assembly provided with a degree of freedom in the edge part of the brushing bush of a one-way moving member. It is an external appearance perspective view which shows a mode that wiring and piping were integrated. It is a block diagram which shows the structural example of the ear-type blood pressure meter 1 of FIG. FIG. 2 is an entity layout diagram of the apparatus main body 2 of FIG. 1. 3 is a flowchart for explaining the operation of the ear blood pressure monitor 1. It is a wave form diagram of blood pressure measurement. It is a block diagram which shows the structural example of the ear-type blood pressure meter 1 of another embodiment. It is a figure which shows the blood-pressure measurement result by the internal / external cuff simultaneous measurement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ear type blood pressure monitor 2 Apparatus main body 3 Wearing part 4 Piping 5 Wiring (signal and power supply line)
6 Inner cuff assembly 7 Outer cuff assembly 9 Cover member 10 Holding member 11 Holding width adjusting screw 17 Spacer 18 First adjusting screw 19 Second adjusting screw 20 Light emitting element (LED)
21 Light receiving element (phototransistor)
22, 23 Cuff bag body 24 O-ring 25 Contact surface 26 Flange portion 27 Bellows portion 28 Opening portion 38 Fitting member 42 Sealing agent 44 Inner wall surface 45 Light shielding layer 46 Opening portion 70 Masking

Claims (14)

An inner cuff inserted into the ear hole, and an outer cuff positioned outside the tragus;
Holding means for holding the inner cuff and the outer cuff;
A pulse wave detecting means built in at least one of the inner cuff or the outer cuff and detecting a pulse wave signal from blood flowing in the blood vessel;
Pressurizing and depressurizing means for pressurizing and depressurizing the inner cuff and the outer cuff with a fluid after sandwiching the tragus with the inner cuff and the outer cuff;
A pipe connected between the inner cuff, the outer cuff and the pressure-increasing / decreasing means for sending the fluid;
Pressure detecting means connected to the pipe for detecting the pressure of the inner cuff and the outer cuff;
Blood pressure measurement control means for measuring a blood pressure value from the pulse wave signal,
One end of the holding means is open, and a first holding member that holds the outer cuff, a second holding member that holds the inner cuff, and a main holding to which the first and second holding members are attached. And the first holding member and the second holding member are joined to the main holding member so as to rotate,
Further, when the first and second holding members do not rotate and are in a steady position, the holding means is substantially parallel to the first and second holding members, and the inner cuff and The blood pressure measuring device, wherein the outer cuffs are opposed to each other.   At least one of the first and second holding members in the holding means can be expanded and contracted with a predetermined width, and the opposing positions of the inner cuff and the outer cuff can be relatively offset. The blood pressure measurement device according to claim 1.   The blood pressure measurement device according to claim 1, further comprising a clamping width adjusting mechanism for adjusting a clamping width between the outer cuff and the inner cuff.   The blood pressure measuring device according to claim 3, wherein the clamping width adjusting mechanism adjusts the clamping width while maintaining the opposed state of the outer cuff and the inner cuff.   The blood pressure measurement device according to any one of claims 3 and 4, wherein the clamping width adjusting mechanism is a screw mechanism.   The blood pressure measuring device according to any one of claims 3 and 4, wherein the clamping width adjusting mechanism is a brushing bush mechanism.   The blood pressure measurement device according to any one of claims 3 to 6, wherein the outer cuff is attached to the clamping width adjusting mechanism.   The blood pressure measurement device according to claim 7, wherein the outer cuff is attached to the clamping width adjusting mechanism so as to be able to swing.   9. The blood pressure measurement device according to claim 8, wherein the outer cuff is fixed to the clamping width adjusting mechanism by a ball bearing.   10. The blood pressure measurement device according to claim 1, wherein side surfaces of the outer cuff and the inner cuff other than a contact surface that directly contacts the tragus are configured in a bellows shape. .   The blood pressure measuring device according to claim 10, wherein the number of steps of the bellows of the outer cuff and the inner cuff is the same.   The cushion part for reducing a user's burden by pressing a part of ear is attached to the part to which the inner cuff in the second holding member is attached. The blood pressure measurement device according to any one of 1 to 11.   The blood pressure measurement device according to any one of claims 1 to 12, wherein the outer cuff and the inner cuff have different cross-sectional shapes. The blood pressure measurement device according to any one of claims 1 to 13, wherein a cross-sectional shape of the outer cuff is substantially circular, and a cross-sectional shape of the inner cuff is substantially elliptical or oval.

Images