Blood pressure cuff and blood pressure monitor

Abstract

Blood pressure measuring cuff (20) comprising a tensioning mechanism (21) which is located between a substantially rod-shaped measuring location, the tensioning mechanism (21) comprising: a first clamping portion (11M) having a shape curved along a first half of an outer peripheral surface of the measurement location to press the first half side; a second clamping portion (12M) having a shape curved along a second half opposite to the first half of the outer peripheral surface of the measuring location to press the second half side; a sliding opening (13) formed at an end portion (11N) in a circumferential direction (X1) of the first clamping portion (11M) so as to pass through in a passing direction (Y) intersecting with the circumferential direction (X1); and a slide rail (14) extending from one end portion (12S) of the second clamping portion (12M) corresponding to the one end portion (11N) of the first clamping portion (11M) and into the sliding opening (13) of the first clamping portion (11M), fitting therein and sliding with friction relative to the sliding opening (13), wherein the slide opening (13) and the slide rail (14) are curved so as to protrude on one side near other end portions (11e, 12e) of the first clamping portion (11M) and the second clamping portion (12M).

Description

Technical area

[0001] The present invention relates to a blood pressure measuring cuff, and more particularly, it relates to a blood pressure measuring cuff having a fastening mechanism that encloses a measuring site.

[0002] The present invention relates to a blood pressure monitor which includes such a blood pressure measuring cuff. Background of the state of the art

[0003] Conventionally, as disclosed in Patent Document 1 (JP H4-51916U), for example, a hemostasis assisting device for an arm is known, which includes: a plate fixed on a lower side; an adjustment scale extending in a vertical direction and provided in an upright manner on the plate fixed on the lower side; an adjustment portion provided on the adjustment scale so as to be capable of sliding vertically; an upper side fixed plate extending parallel to the lower side fixed plate from the adjustment portion; and a compression end provided below the front end of the upper side fixed plate. The adjustment portion may be fixed on the adjustment scale with a fixing screw.

[0004] This hemostasis aid is used to compress the arm, performing a procedure in which i) the fixing screw is loosened, ii) the adjustment section is pulled upwards along the adjustment scale to open the gap between the plate fixed on the lower side and the compression end placed above, iii) the arm is passed through the gap between the plate fixed on the underside and the compression end and positioned, iv) the adjustment section is slid downwards along the adjustment scale to narrow the gap between the plate fixed on the underside and the compression end, and v) the fixing screw is tightened again.

[0005] Accordingly, hemostasis is achieved by placing the arm between the plate fixed on the underside and the compression end. Citation listPatent literature

[0006] Patent document 1: JP H04 - 51 916 U

[0007] JP 2015 - 036 041 A describes an arm compression device that compresses a person's arm to block blood flow. The arm compression device comprises a first and a second compression unit with a predetermined stiffness, a fluid bag that expands upon fluid supply and compresses the arm, and a biasing element that holds the two compression units together. Summary of the inventionTechnical problem

[0008] It is envisaged that the configuration in which the measurement site is intermediate (referred to as a "clamping mechanism"), as in the hemostasis assist device described above, may also be applied to a blood pressure cuff.

[0009] However, in the hemostasis assist device described above, the five operations i) to v) described above are necessary to compress the arm, which is problematic in that it is uncomfortable.

[0010] In view of the above, the invention aims to provide a blood pressure measuring cuff having a tightening mechanism surrounding a measuring site and which can be fastened with a simple operation. Solution to the problem

[0011] In order to solve the problem described above, the blood pressure measuring cuff according to the present invention is a blood pressure measuring cuff having a tensioning mechanism surrounding a substantially rod-shaped measuring site, wherein the clamping mechanism includes: a first clamping portion having a shape curved along a first half of an outer peripheral surface of the measurement location so as to press the first half side; a second clamping portion having a shape curved along a second half opposite to the first half of the outer peripheral surface of the measuring location so as to press the second half side; a sliding hole curved on an end portion in a circumferential direction of the first clamping portion so as to penetrate in a passing direction intersecting with the circumferential direction; and a slide rail extending along an end portion of the second clamping portion corresponding to an end portion of the first clamping portion, and fitting into the sliding opening of the first clamping portion therein and sliding with friction relative to the sliding opening, wherein the slide opening and the slide rail are curved so as to protrude on one side near the other end portions of the first clamping portion and the second clamping portion.

[0012] In this specification, an "end portion" of the first span portion and an "end portion" of the second span portion indicate portions in certain areas, including the edges.

[0013] Also, the “other end portions” of the first clamping portion and the second clamping portion each refer to an end portion on a side opposite to that of the “one end portion” within the two end portions in the circumferential direction.

[0014] The "sliding" of the slide rail relative to the sliding opening is also relative. Contrary to the above description, it can be said that the sliding opening (i.e., the first clamping section) slides relative to the slide rail.

[0015] The blood pressure measurement cuff of the present invention is attached to the measurement site using the following procedure. Note that first, the gap between the first clamping portion and the second clamping portion is in the open state (a state in which the sliding opening is located on the front end side of the slide rail and the gap between the first clamping portion 11M and the second clamping portion 12M is open). (a) First, the measuring location is arranged between the first clamping section and the second clamping section. (b) Next, the slide rail is slid relative to the slide hole in a direction of closing the gap between the first clamping portion and the second clamping portion with the measurement location located between the first clamping portion and the second clamping portion (the state in which the measurement location is thus located therebetween is called the “fastened state”).

[0016] The blood pressure cuff is thus attached to the measurement site using two processes: the application process (a) and the closing process (b). Accordingly, the blood pressure cuff can be attached using a simpler process compared to the conventional example (which requires five processes).

[0017] In the above-described fixed state, a fluid bladder provided, for example, along the inner peripheral surface of the first clamping portion is inflated for blood pressure measurement. Even when a force is applied in the direction of relatively opening the gap between the inner peripheral surface of the first clamping portion and the inner peripheral surface of the second clamping portion, a moment is applied from the slide opening to the slide rail, and the frictional force increases. As a result, the first clamping portion does not easily open relative to the second clamping portion (and the measurement location), and the above-described fixed state is maintained.

[0018] Also, in the blood pressure measurement cuff, the sliding hole and the sliding rail are curved so that they protrude on the side near the other end portions of the first clamping portion and the second clamping portion. Accordingly, in the open state, the gap between the other end portion of the first clamping portion and the other end portion of the second clamping portion is wider than when the sliding hole and the sliding rail are directed straight. As a result, the arranging process (a), or in other words, the process of arranging the measurement site between the first clamping portion and the second clamping portion, is easier.

[0019] After the blood pressure measurement (a procedure for blood pressure measurement described later is referred to as (c)), the blood pressure measurement cuff is removed from the attached state using the following procedure. (d) The slide rail is slid with respect to the slide opening in the direction of opening the gap between the first clamping portion and the second clamping portion, wherein the gap between the first clamping portion and the second clamping portion is set to the open state. (e) Next, the measurement location is removed from between the first clamping section and the second clamping section.

[0020] Note that, since there is friction between the sliding hole and the sliding rail, it is easy to hold the blood pressure measuring cuff in the state where the gap between the first clamping portion 11M and the second clamping portion 12M is open (opened state). Note that the blood pressure measuring cuff can also be held in a state where the gap between the first clamping portion and the second clamping portion is closed (closed state). In this case, when the blood pressure measuring cuff is to be used, an operation of opening the gap between the first clamping portion and the second clamping portion is added before the above-described arranging operation (a).

[0021] In a blood pressure measuring cuff according to an embodiment, a fluid bladder to be inflated during blood pressure measurement is provided along one or both of an inner peripheral surface of the first clamping portion and an inner peripheral surface of the second clamping portion.

[0022] In the blood pressure cuff according to the embodiment, the fluid bladder is inflated during blood pressure measurement when attached. Accordingly, an artery running through the measurement site is compressed, and the blood pressure measurement is performed gently.

[0023] In a blood pressure measuring cuff according to one embodiment, a first pressure region for placing a finger is formed adjacent to the sliding opening on the other circumferential surface side of the one end portion of the first clamping portion, and a second pressure region for placing a finger is formed at a position corresponding to the first pressure region on the outer circumferential surface side of the one end portion of the second clamping portion.

[0024] For example, the measurement location belongs to the left half of the subject's body (e.g., the left wrist, the left upper arm, or the like). In the blood pressure measurement cuff of the embodiment, at the time of the arrangement process (a), the sliding opening and the sliding rail are arranged on a side near the center of the subject's body, and in this case, on a side near the right hand in the periphery of the measurement location. In this case, the subject can narrow the gap between the first clamping portion and the second clamping portion by pinching the first pressure portion and the second pressure portion with the thumb and another finger of the right hand so that they are brought close to each other.At this time, the first pressure region is formed adjacent to the slide hole, and the second pressure region is formed at a position corresponding to the first pressure region, and therefore, the pressure force applied to the slide rail through the slide hole is relatively small. In contrast, the pressure force applied to the slide hole by the slide rail is relatively small. Accordingly, the friction force between the slide hole and the slide rail is also relatively small. As a result, the measuring operator can easily close the gap between the first clamping portion and the second clamping portion. In other words, the closing operation (b) can be easily performed with the right hand (one hand).

[0025] In a blood pressure cuff according to an embodiment a third finger-placing pressing portion is formed on a front end of the slide rail, and a fourth finger-placing pressing portion is formed adjacent to the slide opening on the inner circumferential surface side of the one end portion of the first clamping portion.

[0026] In the blood pressure cuff of the embodiment, at the time of the opening operation (d), the person being measured can close the gap between the first clamping portion and the second clamping portion by pinching the third pressing portion and the fourth pressing portion with the thumb and another finger of one hand to bring them close to each other. At this time, the third pressing portion is formed on the front end of the slide rail, and the fourth pressing portion is formed adjacent to the sliding opening, and therefore the pressing force applied to the slide rail through the sliding opening is relatively small. Accordingly, the frictional force between the sliding opening and the slide rail is also relatively small. As a result, the person being measured can easily open the gap between the first clamping portion and the second clamping portion. In other words, the opening operation (d) can be easily performed with one hand.

[0027] In a blood pressure cuff according to an embodiment a cross-section of the sliding opening, which is taken orthogonally to the passage direction, is substantially rectangular, and the shape of a cross section of the slide rail taken orthogonally to a direction in which the slide rail extends substantially coincides with the shape of the cross section of the sliding opening.

[0028] Here, the cross-section of the slide hole being "substantially rectangular" includes not only a true right angle, but also a case where it is slightly deformed due to a manufacturing variation or the like. Also, the shape of the cross-section of the slide rail "substantially conforming" to the shape of the cross-section of the slide hole by being not only a true right angle, but also includes a case where chamfering is formed on a corner portion (in the cross-sectional area) of the slide rail and a case where it is slightly deformed due to a manufacturing variation or the like.

[0029] In the blood pressure measuring cuff of the embodiment, at the time of the closing operation (b) or the opening operation (d), the first clamping portion and the second clamping portion move (displace) along the plane including the curved slide rail. In other words, since the slide rail, which is rectangular in cross section, fits into the sliding opening, which is rectangular in cross section, the first clamping portion is prevented from rotating around the slide rail. Accordingly, even if the operations (a) to (e) are repeated, the first clamping portion and the second clamping portion will always oppose each other after the closing operation (b) and enter a state in which the measurement site can be compressed.

[0030] In a blood pressure cuff according to an embodiment within the edges constituting an exit / entrance of the sliding opening on a side away from the second clamping portion in the passage direction, a second edge on a side near the other end portion of the first clamping portion is at a position closer to the second clamping portion in the passage direction than a first edge on a side away from the other end portion of the first clamping portion, and / or Within the edges forming an exit / entrance on a side near the second clamping portion of the sliding opening in the passage direction, a third edge on a side away from the other end portion of the first clamping portion is at a position farther away from the second clamping portion in the passage direction than a fourth edge on a side near the other end portion of the first clamping portion is.

[0031] In the blood pressure measurement cuff of the embodiment, in the attached state, the fluid bladder provided, for example, along the inner circumferential surface of the first clamping portion is inflated for blood pressure measurement. When a force is applied in a direction relative to the opening between the inner circumferential surface of the first clamping portion and the inner circumferential surface of the second clamping portion, the compressive force applied to the slide rail by the inner surface of the sliding opening increases. Specifically, when the inner circumferential surface of the first clamping portion is used as a force application point and the second edge of the sliding opening is used as a fulcrum, the third edge of the sliding opening corresponds to the action.Here, in the blood pressure measuring cuff of the embodiment, the second edge is at a position closer to the second clamping portion in the passage direction than the first edge, and / or the third edge is at a position farther away from the second clamping portion in the passage direction than the fourth edge. In other words, the distance (the length of the arm of the moment) between the second edge, which is the fulcrum, and the third edge, which is the point of action, is relatively short. Accordingly, the pressing force acting on the third edge, which is the point of action (and the second edge, which is the fulcrum), increases. As a result, the frictional force acting between the sliding hole and the sliding rail increases.As a result, the first clamping section is even less likely to open with respect to the second clamping section (and the measuring location), and the fastened state described above is reliably maintained.

[0032] In a blood pressure cuff according to an embodiment the cross sections of the first edge and the fourth edge are formed so as to reduce friction, and the cross sections of the second edge and the third edge are formed at right angles or acute angles so as to increase friction.

[0033] During the above-described closing operation (b), the compressive force applied to the slide rail through the inner surface of the sliding opening acts primarily on the first edge and the fourth edge. Here, in the blood pressure cuff of the embodiment, the bends or curvatures in the cross sections of the first edge and the fourth edge are formed to reduce friction. Accordingly, the closing operation (b) is performed more easily.Also, for example, in the attached state, the fluid bladder provided along the inner circumferential surface of the first clamping portion is inflated for blood pressure measurement. When a force is applied in a direction of relative opening between the inner circumferential surface of the first clamping portion and the inner circumferential surface of the second clamping portion, the pressing force applied to the slide rail through the inner surface of the sliding opening acts mainly on the second edge and the third edge. Here, in the blood pressure measurement cuff of the embodiment, the cross sections of the second edge and the third edge are formed at right angles or acute angles to thereby increase the frictional force.Accordingly, the first clamping section is less likely to open with respect to the second clamping section (and the measuring location), and the fixed state described above is reliably maintained.

[0034] In a blood pressure cuff according to an embodiment a dimension in the circumferential direction of the second clamping section is set so that it is smaller than a dimension in the circumferential direction of the first clamping section, and the passage direction of the sliding hole is directed outward in the circumferential direction with respect to the one end portion of the first clamping portion when approaching the inner circumferential surface side from the outer circumferential surface side of the first clamping portion.

[0035] In the blood pressure measurement cuff of the embodiment, for example, when the measurement target site is thick, the circumferential dimension of the first clamping portion is set to a dimension that completely covers a first half of the thick measurement site. The artery to be compressed passes through this first half. In this case, at the time of the positioning process (a), the first half of the thick measurement site is positioned so as to face the inner circumferential surface of the first clamping portion.Note that, since the circumferential dimension of the second clamping portion is smaller than the circumferential dimension of the first clamping portion, in the attached state after the closing operation (b), the second half portion of the thick measurement site, which is far from the slide rail, sometimes protrudes outward relative to the other end portion of the second clamping portion. However, if the fluid bladder is provided in almost the entire area along the inner circumferential surface of the first clamping portion, blood pressure measurement is not hindered. On the other hand, in the case where the measurement site serving as the measurement target is also thin, at the time of the arrangement operation (a), the first half of the thin measurement site is arranged to face the inner circumferential surface of the first clamping portion.At the time of the closing operation (b), when the second clamping section relatively approaches the first clamping section, the second clamping section changes the area opposite from one end section to the other end section of the first clamping section while significantly moving almost diagonally (including a rotation of the orientation accompanying the curvatures of the slide opening and the slide rail). Accordingly, the thin measurement location can be reliably located between the first clamping section and the second clamping section.

[0036] In a blood pressure cuff according to an embodiment a fluid bellows, which is to be inflated during the blood pressure measurement, is provided in almost the entire area of ​​the inner circumferential surface of the first clamping part area, and an element which limits the swelling of an opposite portion of the fluid bellows is provided on an inner circumferential surface side of a portion adjacent to the one end portion of the second clamping portion.

[0037] In the case where the measurement target is thin, unless there is a certain device, when the fluid bladder is inflated, the end portion of the fluid bladder on the side near the slide rail toward the second clamping portion swells significantly, and there is a possibility that blood pressure measurement will be hindered. Here, in the blood pressure measuring cuff of the embodiment, the inner circumferential surface side of the portion adjacent to an end portion of the second clamping portion is provided with a member that limits the swelling of the opposite portion of the fluid bladder. Accordingly, the member limits the swelling of the opposite portion of the fluid bladder. As a result, blood pressure measurement is performed accurately and smoothly.

[0038] In a blood pressure measuring cuff according to one embodiment, an elastic element applies an extensible force between the one portion of the first clamping portion and the one end portion of the second clamping portion.

[0039] In the blood pressure measurement cuff of the embodiment, at the time of closing, the gap between the first clamping portion and the second clamping portion is easily closed due to the tensile force of the elastic member. For example, if the tensile force of the elastic member is set to be greater than the friction force between the sliding opening and the slide rail, at the time of closing, the measurer no longer needs to apply an external force to close the gap between the first clamping portion and the second clamping portion. Also, in the fastened state, due to the tensile force of the elastic member, the inner circumferential surface of the first clamping portion (or the fluid bladder) and the inner surface of the second clamping portion come into close contact with the measurement site. Accordingly, the blood pressure measurement is performed accurately and smoothly.

[0040] A blood pressure measuring cuff according to an embodiment includes a locking pawl mechanism that holds the first clamping portion and the second clamping portion in an open state.

[0041] In the blood pressure measurement cuff of the embodiment, the ratchet mechanism maintains the gap between the first clamping portion and the second clamping portion in the open state. Accordingly, the person being measured can perform the fitting operation while maintaining the gap between the first clamping portion and the second clamping portion in the open state. Note that after the fitting operation, the maintenance of the open state performed by the ratchet mechanism can be removed.

[0042] In another aspect, a blood pressure monitor of the present invention includes: the blood pressure measuring cuff of the present invention; and a main body having a blood pressure measuring element formed therein.

[0043] In the blood pressure monitor of the present invention, the blood pressure cuff can be attached using a simple procedure as described above. Accordingly, blood pressure measurement is performed smoothly.

[0044] Specifically, in the attached state resulting from the arranging process (a) and the closing process (b) being performed in sequence, (c) An operation switch, which is provided in the main unit, for example, is pressed, and a blood pressure measurement start instruction is input to the main unit. Accordingly, the fluid bladder, which is provided, for example, along the inner peripheral surface of the first clamping portion, is inflated, and the blood pressure measurement is performed. (d) After the measurement ends, the slide rail is slid with respect to the slide opening in the direction of opening the gap between the first clamping portion and the second clamping portion, whereby the gap between the first clamping portion and the second clamping portion is set in the open state. (e) The measuring location is removed from the space between the first clamping section and the second clamping section.

[0045] This makes blood pressure measurement with the blood pressure monitor easy.

[0046] In a blood pressure monitor of one embodiment the main unit is integrally attached to the blood pressure cuff to cover the outer circumferential surface of the first clamping part area, an operation switch for inputting a blood pressure measurement start instruction is provided in the area adjacent to the sliding opening of the first clamping part on the outer surface of the main body, and a second pressure area for placing a finger is formed at a position corresponding to the operation switch on the outer circumferential surface side of the one end portion of the second clamping portion of the cuff.

[0047] For example, the measurement location belongs to the left half of the subject's body (e.g., the left upper arm or the left wrist). In the blood pressure monitor of the embodiment, when the above-described arrangement process (a) is performed, the slide opening and the slide rail are arranged on a side near the center of the subject's body, and in this case, on a side near the right hand in the periphery of the measurement location. Furthermore, an operation switch for inputting the blood pressure measurement start instruction is provided in a region of the outer surface of the main body that is adjacent to the slide opening of the first clamping part section.Accordingly, the person taking the measurement can easily close the gap between the first clamping section and the second clamping section by pressing the operation switch and the second pressure section with the thumb and another finger of the right hand so that they are brought close to each other. In other words, the closing operation (b) can be easily performed with one hand. Also, by performing the closing operation (b), it is possible to perform the measurement start instruction operation (c), or in other words, to input the blood pressure measurement start instruction to the main unit by pressing the operation switch provided on the main unit. In other words, the closing operation (b) and the measurement start instruction operation (c) can be performed simultaneously. Accordingly, the blood pressure measurement can be performed with a simple operation. Advantageous effects of the invention

[0048] As is apparent from the above description, the blood pressure measuring cuff of the present invention can be attached using a simple operation.

[0049] Also, in the blood pressure monitor of the present invention, the blood pressure measuring cuff can be attached using a simple operation. Short description of the drawings Fig. 1 is a perspective view showing the exterior of a blood pressure monitor including a blood pressure measuring cuff (in an open state) according to an embodiment of the invention. Fig. 2(C) is a drawing showing a front view of the blood pressure monitor used in Fig. 1 is shown, Fig. 2(A) is a drawing showing a top view of the blood pressure monitor used in Fig. 2(C), Fig. 2(B) is a drawing showing a left side view of the blood pressure monitor used in Fig. 2(C), and Fig. 2(D) is a drawing showing a right side view of the blood pressure monitor used in Fig. 2(C). Fig. 3 is a perspective view showing a state (attached state) in which the blood pressure monitor including the blood pressure measuring cuff shown in Fig. 1, is attached to a left wrist, which serves as a measurement site. Fig. 4(C) is a drawing showing a front view of the blood pressure monitor used in Fig. 3 is shown, Fig. 4(A) is a drawing showing a top view of the blood pressure monitor used in Fig. 4(C) is shown, Fig. 4(B) is a drawing showing a left side view of the blood pressure monitor used in Fig. 4(C), and Fig. 4(D) is a drawing showing a right side view of the blood pressure monitor used in Fig. 4(C). Fig. 5 is a drawing showing a process of placing the left wrist serving as the measurement site between the first clamping portion and the second clamping portion of the blood pressure measuring cuff. Fig. 6 is a drawing showing a process of closing the blood pressure cuff. Fig. Figure 7 is a drawing showing forces applied to the blood pressure cuff during blood pressure measurement. Fig. 8 is a drawing showing a process of opening the blood pressure cuff. Fig. 9 is a drawing showing a state in which a blood pressure monitor including the blood pressure measuring cuff is attached to a thick left wrist serving as the measuring site. Fig. 10 is a drawing showing a state in which the blood pressure monitor including the blood pressure measuring cuff is attached to the thin left wrist serving as the measurement site. Fig. 11 is a perspective view showing the exterior of the blood pressure monitor including a blood pressure measuring cuff according to a modified example. Fig. 12(A) is a drawing showing a process of opening the blood pressure cuff used in Fig. 11, and shows a process of placing the left wrist, which serves as the measurement site, between the first clamping portion and the second clamping portion of the blood pressure measuring cuff. Fig. 12(B) is a drawing showing a right side view of the blood pressure monitor used in Fig. 12(A). Fig. 13(A) is a perspective view showing a state (attached state) in which the blood pressure monitor including the blood pressure measuring cuff shown in Fig. 11, is attached to the left wrist, which serves as the measurement site. Fig. 13(B) is a drawing showing a right side view of the blood pressure monitor used in Fig. 13(A). Fig. 14 is a drawing showing a block configuration of the blood pressure monitor. Fig. 15 is a drawing showing a flow of blood pressure measurement performed by the sphygmomanometer. Description of the embodiments

[0050] Hereinafter, an embodiment of the invention will be described in detail with reference to the drawings.

[0051] Fig. Fig. 1 shows a perspective view of the exterior of a blood pressure measuring device 1, which shows a blood pressure measuring cuff (in an open state) 20, according to an embodiment of the invention. Also shows Fig. 2(C) a view of the front of the blood pressure monitor 1, Fig. 2(A) shows a top view of the blood pressure monitor 1, Fig. 2(B) shows a view from the left side of the blood pressure monitor 1 and Fig. Figure 2(D) shows a right side view of the blood pressure monitor 1. As shown in the drawings, the blood pressure monitor 1 integrally includes a blood pressure measurement cuff (hereinafter referred to simply as "cuff") 20, which includes a clamping mechanism 21, and a main body 10 in which a blood pressure measurement element is installed. As shown in Fig. As shown in Figure 3, the blood pressure monitor 1 is attached to a nearly rod-shaped left wrist 90, which serves as the measurement site. The outer circumferential surface of the left wrist 90 includes a half 90a on the palm side, which serves as a first half, and a half 90b on the back, which serves as a second half corresponding to the opposite side. The arteries 90u and 90v, which are to be compressed at the time of blood pressure measurement, pass through the vicinity of the half 90a on the palm side. Note that the Fig. 4(A) to 4(D) show the blood pressure monitor which is Fig. 3 is shown, corresponding to the Fig. 2(A) to 2(D).

[0052] As can be seen from the Fig. 1 and Fig. 2(C), the cuff 20 includes a top member 11 to which the main body 10 is integrally attached, and a bottom member 12 provided so as to be capable of sliding with respect to the top member 11.

[0053] Note that the terms "top element" and "bottom element" are used for convenience in description, and it is actually possible to use an orientation in which the top element is on the lower side and the bottom element is on the top side. The same applies to the "left end portion" and "right end portion" described later, and it is actually possible to use an orientation in which the left end portion is on the right side and the right end portion is on the left side.

[0054] The upper side member 11 includes a first clamping portion 11M having a shape curved in a circumferential direction X1 along the half 90a on the palm side of the left wrist 90, and a block portion 11N integrally formed on one end portion (the right end portion in Fig. 1 and Fig. 2(C)) 11f in the circumferential direction X1 of the first clamping portion 11M. The first clamping portion 11M is formed in a nearly plate shape having a nearly circular arc shape obtained by cutting away a portion in a circumferential direction of a short cylinder. A sliding hole 13 is formed in the block portion 11N so as to pass through in a direction (referred to as a "passing direction") Y that intersects with the circumferential direction X1. A cross section of the sliding hole 13, which is taken orthogonally to the passing direction Y, is approximately rectangular (specifically, see Fig. 4(A)). As can be seen from Fig. 1 and Fig. As can be understood from Fig. 2(C), a flat first pressing portion 15, which is adjacent to the front side of the sliding opening 13, inclined upward and rightward, and is for placing a finger, is formed on the upper side (outer peripheral surface 11a side) of the block portion 11N. "CLOSE" is indicated on the first pressing portion 15. A flat fourth pressing portion 18, which is adjacent to the rear side of the sliding opening 13, inclined upward and rightward, and is for placing a finger, is formed on the lower side (inner peripheral surface 11b side) of the block portion 11N. A pair of guide portions 11P and 11Q for guiding the slide rail 14, which will be described later, are integrally formed directly below the block portion 11N so as to extend obliquely downward and rightward.

[0055] The lower side member 12 includes a second clamping portion 12M having a shape curved in the circumferential direction X2 along the half 90b on the back of the left wrist 90, communication plate portions 12P and 12Q integrally formed on one end portion (right end portion in Fig. 1 and Fig. 2(C)) 12f in the circumferential direction X2 of the second clamping portion 12M, a substrate portion 12S, the slide rail 14, and an end plate portion 12V. The second clamping portion 12M is formed into a nearly curved plate shape obtained by cutting away a portion in the circumferential direction of a short cylinder, similarly to the first clamping portion 11M. The dimension in the circumferential direction X2 of the second clamping portion 12M is set to be smaller than the dimension in the circumferential direction X1 of the first clamping portion 11M. The connecting plate portions 12P and 12Q are formed into nearly flat shapes, and in order to increase their strength, their front ends are united and integrated.The substrate portion 12S has a nearly flat shape and is integrally formed on the combined front ends of the upper-side connecting plate portion 12P and the lower-side connecting plate portion 12Q so as to extend diagonally upward. A protrusion 12R is integrally formed on the substrate portion 12S so as to extend toward the front. A flat second pressing portion 16, which is inclined upward and rightward and is for placing a finger, is formed on the lower side (the outer peripheral surface 12a side) of the protrusion 12R at a position corresponding to the first pressing portion 15 of the top member 11 in the front-rear (forward-backward) direction. "CLOSE" is indicated on the protrusion 12R.The slide rail 14 extends upward and to the left from the substrate portion 12S, and more specifically, it extends into and fits into the sliding opening 13 of the first clamping portion 11M. The shape of a cross section taken orthogonal to the direction in which the slide rail 14 extends is almost rectangular and substantially coincides with the shape of the cross section of the sliding opening 13. Accordingly, the slide rail 14 can slide with friction relative to the sliding opening 13. Note that chamfering is formed on corner portions 14c of the slide rail 14 (specifically, see FIG. Fig. 1 and Fig. 3), and this prevents the corner portions 14c from reaching the slide opening 13. The end plate portion 12V is formed in a block shape having a dimension larger than the cross-sectional dimension of the slide opening 13 in the front-rear and left-right directions, and is fixed to the front end of the slide rail 14. A flat third pressing portion 17, which is inclined upward to the right and is for placing a finger, is formed on top of the end plate portion 12V at a position corresponding to the fourth pressing portion 18 of the upper side member 11 in the front-rear direction. "OPEN" is displayed in the third pressing portion 17.

[0056] The slide rail 14 can slide relatively from the front end side (the end plate portion 12V side) to the base side (substrate portion 12S side), or vice versa, from the base side to the front end side with respect to the slide hole 13. When the slide hole 13 is located on the front end side of the slide rail 14 and the gap between the first clamping portion 11M and the second clamping portion 12M is in the open state, the sleeve 20 is said to be in the "open state." Conversely, when the slide hole 13 is located on the base side of the slide rail 14 and the gap between the first clamping portion 11M and the second clamping portion 12M is in the closed state, the sleeve 20 is said to be in the "closed state."

[0057] In this example, when the cuff 20 is in the open state, the first pressure area 15 and the third pressure area 17 are positioned substantially in the same plane. This improves the appearance of the cuff 20.

[0058] When approaching the lower side from the upper side of the block portion 11N, the passage direction Y of the sliding hole 13 is inclined toward the outside (ie, toward the outside with respect to a vertical line (not shown) extending in the vertical direction, and downward and to the right in this example) in the circumferential direction X1 with respect to the right end portion 11f of the first clamping portion 11M. In addition, the sliding hole 13 and the slide rail 14 are curved so as to be on the side near the other end portions (the left end portions in Fig. 1 and Fig. 2(C)) 11e and 12e of the first clamping part 11M and the second clamping part 12M protrude.

[0059] In this example, the upper side member 11 (including the first clamping portion 11M, the block portion 11N, and the guide portions 11P and 11Q) is composed of ABS (acrylonitrile butadiene styrene copolymer) resin and is formed by integral molding. On the other hand, for the lower side member 12, the second clamping portion 12M, the connecting plate portions 12P and 12Q, the base portion 12S, and the slide rail 14 are formed by integral molding. The separately manufactured end plate portion 12V is fixed to the front end of the slide rail 14 by screws (not shown). The members 12M, 12P, 12Q, 12S, 14, and 12V of the lower side member 12 are also constructed of ABS resin, similar to the upper side member 11.

[0060] In this example, the fluid bladder 22 to be inflated during blood pressure measurement is provided in almost the entire area along the inner peripheral surface 11b of the first clamping portion 11M. Note that instead of or in addition to this, the fluid bladder may be provided along the inner peripheral surface 12b of the second clamping portion 12M.

[0061] Fig. Figure 5 shows a cross section of the blood pressure monitor 1, which is parallel to that shown in Fig. 2(C). As shown in Fig. 5, within the edges constituting the exit / entrance on the side of the sliding opening 13 which is away from the second clamping portion 12M in the passage direction Y, a second edge 13e2 on the side near the left end portion 11e of the first clamping portion 11M is provided at a position closer to the second clamping portion 12M in the passage direction Y than the first edge portion 13e1 on the side away from the left end portion 11e of the first clamping portion 11M. Also, within the edges constituting the exit / entrance on the side of the sliding opening 13 near the second clamping portion 12M in the passing direction Y, the third edge 13e3 on the side away from the left end portion 11e of the first clamping portion 11M is in a position farther away from the second clamping portion 12M in the passing direction Y than the fourth edge 13e4 on the side near the left end portion 11e of the first clamping portion 11M.

[0062] Curvatures are formed in the cross sections of the first edge 13e1 and the fourth edge 13e4 to reduce friction. On the other hand, the cross sections of the second edge 13e2 and the third edge 13e3 are formed at right angles or acute angles to increase friction.

[0063] As from Fig. 5, the main body 10 is integrally fixed to the first clamping portion 11M of the upper side member 11. Specifically, a recessed groove 10d is provided on the lower surface 10b of the main body 10. A projection 11c, which fits into the groove 10d of the main body 10, is provided on the outer peripheral surface 11a of the first clamping portion 11M. The recessed groove 10d of the main body 10 is positioned by fitting onto a projection 11c of the first clamping portion 11M and is integrally fixed using a fixing jig (not shown) (e.g., a configuration in which a hook is provided on the first clamping portion 11M side, and a locking hole enclosing the hook is provided on the main body 10 side).A connecting hole 11o passing between the outer peripheral surface 11a side and the inner peripheral surface 11b side is provided at a location corresponding to the protrusion 11c. Air for inflation is supplied to the fluid bladder 22 from a pump described later, which is disposed inside the main body 10, and air is discharged from the fluid bladder 22 through a pipe (not shown) passing through the connecting hole 11o.

[0064] As from Fig. 1 and Fig. As can be seen from Fig. 3, an operation unit 52 with which a user (typically the measurer) of the blood pressure monitor 1 performs an operation is provided on the right end portion of the upper surface (outer surface) 10a of the main body 10, or in other words, in the area adjacent to the slide opening 13 of the first clamping portion 11M. In the operation portion 52, a measurement / stop switch 52A with which the user instructs to start or stop the measurement is arranged on the front side, or in other words, at a position corresponding to the second pressure area 16 in the front-back (forward-backward) direction, and a record call switch 52B with which the user calls the measurement of the blood pressure is arranged on the back side.On the upper surface 10a of the main body 10, a display device (in this example, a liquid crystal display element) 50 for displaying the blood pressure measurement results and information related to the blood pressure in an area outside the operation unit 52 is provided.

[0065] The blood pressure monitor 1 is attached to the left wrist 90 serving as the measurement site by the following operations (a) and (b). Note that, first, the opening between the first clamping portion 11M and the second clamping portion 12M is in the open state.

[0066] (a) First, as in Fig. 5, the measuring person places the left wrist 90 between the first clamping part area 11M and the second clamping part area 12M.

[0067] At the time of the arrangement process (a), the measuring person arranges the sliding port 13 and the sliding rail 14 on a side near the center of the measuring person's body, and in this case on a side near the right hand, in the periphery of the left wrist 90. Also, the half 90a on the palm side through which the arteries 90u and 90v of the left wrist 90 pass is directed upward and is brought into contact with the fluid bladder 22.

[0068] In the sphygmomanometer 1 as described above, the sliding hole 13 and the sliding rail 14 are curved to protrude on the side near the left end portions 11c and 12e of the first clamping portion 11M and the second clamping portion 12M. Accordingly, in the open state, compared with the case where the sliding hole 13 and the sliding rail 14 are directed straight, a gap Y2 between the left end portion 11e of the first clamping portion 11M and the left end portion 12e of the second clamping portion 12e is more open (the distance Y2 is larger than the distance Y1 on the sliding rail 14). As a result, the assembly process (a) is easier.

[0069] (b) Next, as in Fig. 6, the slide rail 14 is slid with respect to the slide opening 13 in the direction of closing the gap between the first clamping portion 11M and the second clamping portion 12M, whereby the left wrist 90 is sandwiched between the first clamping portion 11M and the second clamping portion 12M (the state in which the measurement location is sandwiched in this way is referred to as the “attached state”).

[0070] At the time of the closing operation (b), the measuring operator can close the gap between the first clamping section 11M and the second clamping section 12M by applying forces F1 and F2 by pinching the first pressing section 15 and the second pressing section 16 with the thumb and another finger of the right hand to bring them closer together. At this time, the first pressing section 15 is formed adjacent to the sliding hole 13, and the second pressing section 16 is formed at a position corresponding to the first pressing section 15, and therefore, the pressing force applied to the slide rail 14 through the sliding hole 13 is relatively small, and the pressing force applied to the slide rail 14 through the sliding hole 13 is relatively small.Specifically, with respect to a moment Tr1 applied through the sliding hole 13 to the slide rail 14 by the force F1, when the first pressure area 15 is used as a point of effort and the first edge 13e1 is used as a pivot point, the fourth edge 13e4 corresponds to the point of action. Here, compared to the distance between the first pressure area 15, which is the point of effort, and the first edge 13e1, which is the pivot point (or more precisely, the length of the arm of the moment; the same applies hereinafter in this section), the distance L1 between the first edge 13e1, which is the pivot point, and the fourth edge 13e4, which is the point of action, is relatively long. Accordingly, the pressure force acting on the fourth edge 13e4 (and the first edge 13e1) is relatively small.Also, regarding the moment Tr2 applied by the slide rail 14 to the slide hole 13 by the force F2, when the second pressure area 16 is used as a point of effort and the fourth edge 13e4 is used as a fulcrum, the first edge 13e1 corresponds to the point of application. Here, compared to the distance between the second pressure area 16, which is the point of effort, and the fourth edge 13e4, which is the fulcrum, the distance L1 between the fourth edge 13e4, which is the fulcrum, and the first edge 13e1, which is the point of application, is relatively long. Accordingly, the pressure force acting on the first edge 13e1 (and the fourth edge 13e4) is relatively small. Accordingly, the frictional force between the slide hole 13 and the slide rail 14 becomes relatively smaller.In addition, since the curvatures are formed in the cross sections of the first edge 13e1 and the fourth edge 13e4, the frictional force between the slide hole 13 and the slide rail 14 further decreases. As a result, the measuring operator can easily close the gap between the first clamping portion 11M and the second clamping portion 12M. In other words, the closing operation (b) can be easily performed with one hand.

[0071] The blood pressure monitor 1 (cuff 20) is thus attached to the left wrist 90 using two processes, namely the placement process (a) and the closure process (b). Accordingly, the blood pressure monitor 1 can be attached using a simpler process compared to the conventional example (which requires five processes).

[0072] For the blood pressure monitor 1, in the attached state (e.g. Fig. 6), which results from performing the arrangement process (a) and the closing process (b) in sequence, the measuring person performs the following measurement start instruction process (c).

[0073] (c) The measurement / stop switch 52A, which serves as the operation switch provided on the main body 10, is pressed to input a blood pressure measurement start instruction to the main body 10. Accordingly, the fluid bladder 22 provided along the inner circumferential surface 11b of the first clamping portion 11M is inflated, and blood pressure measurement is performed (the blood pressure measurement procedure will be described later).

[0074] During blood pressure measurement, as in Fig. As shown in Fig. 7, the fluid bladder 22 provided along the inner circumferential surface 11b of the first clamping portion 11M is inflated, and the forces F3 and F4 in the direction of relative opening are applied in the gap between the inner circumferential surface 11b of the first clamping portion 11M and the inner circumferential surface 12b of the second clamping portion 12M. However, the pressing force increases due to a moment applied to the slide rail 14 from the sliding opening 13, and the pressing force increases due to a moment applied from the slide rail 14 to the sliding opening 13.Specifically, regarding a moment Tr3 applied through the sliding hole 13 to the slide rail 14 by the force F3, when the inner circumferential surface 11b of the first clamping portion 11M is used as the point of action and the second edge 13e2 of the sliding hole 13 is used as the fulcrum, the third edge 13e3 of the sliding hole 13 corresponds to the point of action. Here, compared to the distance (or more precisely, the length of the moment arm; the same applies hereinafter in the section) between the inner circumferential surface 11b of the first clamping portion 11M, which is the point of action, and the second edge 13e2, which is the fulcrum, the distance L2 between the second edge 13e2, which is the fulcrum, and the third edge 13e3, which is the point of action, is relatively short. Accordingly, the compressive force acting on the third edge 13e3 (and the second edge 13e2) increases.Also, regarding a moment Tr4 applied by the slide rail 14 to the slide hole 13 by the force F4, when the inner circumferential surface 12b of the second clamping portion 12M is used as the point of action and the third edge 13e3 of the slide hole 13 is used as the fulcrum, the second edge 13e2 of the slide hole 13 corresponds to the point of action. Here, compared with the distance between the inner circumferential surface 12b of the second clamping portion 12M, which is the point of action, and the third edge 13e3, which is the fulcrum, the distance L2 between the third edge 13e3, which is the fulcrum, and the second edge 13e2, which is the point of action, is relatively short. Accordingly, the compressive force acting on the second edge 13e2 (and the third edge 13e3) increases.Specifically, as described above, the second edge 13e2 is at a position closer to the second clamping portion 12M in the passage direction Y than the first edge 13e1, and the third edge 13e3 is at a position farther from the second clamping portion 12M in the passage direction Y than the fourth edge 13e4. In other words, the distance L2 between the second edge 13e2 and the third edge 13e3 is set to be shorter than the distance L1 between the first edge 13e1 and the fourth edge 13e4. Accordingly, the pressing force acting on the second edge 13e2 and the third edge 13e3 further increases. Accordingly, the frictional force acting between the slide hole 13 and the slide rail 14 increases. In addition, since the cross sections of the second edge 13e2 and the third edge 13e3 are formed into right angles or acute angles, the friction force between the sliding hole 13 and the slide rail 14 further increases.As a result, the first clamping portion 12M is not likely to open with respect to the second clamping portion 1M (and the left wrist 90), and the fastened state is reliably maintained.

[0075] After the blood pressure measurement, the blood pressure monitor 1 is removed using the following procedures (d) and (e).

[0076] (d) After the measurement is completed, as described in Fig. 8, the measuring person slides the slide rail 14 with respect to the slide opening 13 in the direction of opening the gap between the first clamping part 11M and the second clamping part 12M, whereby the gap between the first clamping part 11M and the second clamping part 12M is set to the open state.

[0077] At the time of the opening operation (d), the measuring operator can open the gap between the first clamping portion 11M and the second clamping portion 12M by applying the forces F5 and F6 by pressing the third pressing portion 17 and the fourth pressing portion 18 with the thumb and another finger of the right hand, thus bringing them closer together. At this time, the third pressing portion 17 is formed on the front end of the slide rail 14, and the fourth pressing portion 18 is formed adjacent to the slide opening 13, and therefore, the pressing force applied to the slide opening 13 by the slide rail 14 is relatively small, and the pressing force applied to the slide rail 14 through the slide opening 13 is relatively small.Specifically, with respect to a moment Tr5 applied by the slide rail 14 to the slide hole 13 by the force F5, when the third pressure area 17 is used as a point of action and the first edge 13e1 is used as a pivot point, the fourth edge 13e4 corresponds to the point of action. Here, compared to the distance between the third pressure area 17, which is the point of action, and the first edge 13e1, which is the pivot point, the distance L1 between the first edge 13e1, which is the pivot point, and the fourth edge 13e4, which is the point of action, is relatively long. Accordingly, the pressure force acting on the fourth edge 13e4 (and the first edge 13e1) is relatively smaller.Also, with respect to a moment Tr6 applied through the sliding hole 13 to the slide rail 14 by the force F6, when the fourth pressure area 18 is used as a point of action and the first edge 13e1 is used as a pivot point, the fourth edge 13e4 corresponds to the point of action. Here, compared to the distance between the fourth pressure area 18, which is the point of action, and the first edge 13e1, which is the pivot point (or more precisely, the length of the arm of the moment; the same applies hereinafter in this section), the distance L1 between the first edge 13e1, which is the pivot point, and the fourth edge 13e4, which is the point of action, is relatively long. Accordingly, the pressure force acting on the fourth edge 13e4 (and the first edge 13e1) is relatively smaller. Accordingly, the frictional force between the sliding hole 13 and the slide rail 14 is relatively smaller.In addition, since the curvatures are formed in the cross sections of the first edge 13e1 and the fourth edge 13e4, the frictional force between the slide opening 13 and the slide rail 14 further decreases. As a result, the measuring operator can easily open the gap between the first clamping portion 11M and the second clamping portion 12M. In other words, the opening operation (d) can be easily performed with one hand.

[0078] (e) Next, the measuring person removes the left wrist 90 from the gap between the first clamping part 11M and the second clamping part 12M.

[0079] This means that blood pressure measurement can be carried out with a simple process, corresponding to this blood pressure monitor 1.

[0080] In the sphygmomanometer 1, at the time of the closing operation (b) and the opening operation (d), the first clamping portion 11M and the second clamping portion 12M move (slide) along the plane including the curved slide rail 14. In other words, the slide rail 14, which has a rectangular cross section, fits into the sliding opening 13, which has a rectangular cross section, and therefore the first clamping portion 11M is prevented from rotating around the slide rail 14. Accordingly, even if the operations (a) to (e) are repeated, after the closing operation (b), the first clamping portion 11M and the second clamping portion 12M will always enter a state of opposing each other in the vertical direction and be able to compress the left wrist 90.

[0081] Also with the blood pressure monitor 1, as shown in Fig. 1, the measurement / stop switch 52A serving as an operation switch is provided at a position corresponding to the second pressing portion 16 in the front-rear (forward-backward) direction in a portion of the outer surface of the main body 10 adjacent to the sliding opening 13 of the first clamping portion 11M. Accordingly, the measuring operator can easily close the gap between the first clamping portion 11M and the second clamping portion 12M by pressing the measurement / stop switch 52A and the second pressing portion 16 with the thumb and another finger of the right hand to bring them close to each other. In other words, the closing operation (b) can be easily performed with one hand.Also, by performing the closing operation (b), it is possible to perform the measurement start instruction operation (c), or, in other words, an operation of inputting an instruction to start blood pressure measurement to the main body 10 by pressing the measurement / stop switch 52A. In other words, the person taking the measurement can simultaneously perform the closing operation (b) and the measurement start instruction operation (c), and thus can perform blood pressure measurement with a simpler operation.

[0082] Note that, since there is friction between the sliding hole 13 and the slide rail 14, it is easy to maintain the sphygmomanometer 1 in a state (open state) in which the gap between the first clamping portion 11M and the second clamping portion 12M is open. However, the cuff 20 may be maintained in a state (closed state) in which the gap between the first clamping portion 11M and the second clamping portion 12M is closed. In this case, during use of the sphygmomanometer 1, an operation of opening the gap between the first clamping portion 11M and the second clamping portion 12M is added before the arranging operation (a).

[0083] Fig. Fig. 9 shows a state in which the blood pressure monitor 1 is attached to a left wrist 91 which is thicker than the left wrist 90. As can be seen from Fig. 9, the dimension in the circumferential direction of the first clamping portion 11M is set to have a dimension that completely covers the half 91a on the palm side of the thick left wrist 91. The fluid bladder 22, which is provided in almost the entire area along the inner circumferential surface 11b of the first clamping portion 11M, covers a large portion of the half 91a on the palm side of the thick left wrist 91. Accordingly, due to the fluid bladder being inflated, the arteries 90u and 90v are compressed, and blood pressure measurement is smoothly performed.Note that in this example, since the circumferential dimension of the second clamping portion 12M is smaller than the circumferential dimension of the first clamping portion 11M, the lower left portion of the thick left wrist 91, which is far from the slide rail 14, protrudes outward relative to the left end portion 12e of the second clamping portion 12M. However, since the arteries 90u and 90v to be compressed are present in the palm-side half 91a and not in the back half 91b, blood pressure measurement is not hindered.

[0084] Fig. 10 shows a state in which the sphygmomanometer is attached to a left wrist 92 that is thinner than the above-described left wrist 90. In the case of the thin left wrist 92, at the time of the closing operation (b), as the second clamping portion 12M approaches relative to the first clamping portion 11M, the second clamping portion 12M significantly moves diagonally almost downward and to the left, while the opposite portion is changed toward the left end portion 11e from the right end portion 11f of the first clamping portion 11M (rotation of the orientation accompanying the bending of the slide hole 13 and the slide rail 14 is also included). Also, the second clamping portion 12M enters a state of registration with the half 92b on the back of the thin left wrist 92.Accordingly, the left wrist 92 can be reliably positioned between the first clamping portion 11M and the second clamping portion 12M.

[0085] In this fixed state, as can be seen from Fig. 10, the palm-side half 92a of the thin left wrist 92 is held at a position biased toward the left end portion 11e in the circumferential direction with respect to the first clamping portion 11M. As a result, the right end portion 22x of the fluid bladder 22 enters a state of not being in contact with the left wrist 92 (specifically, the palm-side half 92a). Therefore, unless there is some kind of device, when the fluid bladder 22 is inflated, the right end portion 22x of the fluid bladder 22 will swell significantly toward the second clamping portion 12M, as shown by the two-dot chain line in Fig. 10, and there is a possibility that blood pressure measurement is hindered. Here, in the sphygmomanometer 1, as the gap between the first clamping portion 11M and the second clamping portion 12M approaches the closed state, the right end portion 12f of the second clamping portion 12M and the communication plate portion 12P adjacent thereto approach the right end portion 11f of the first clamping portion 11M (ie, the right end portion 22x of the fluid bladder 22). As a result, in the state of being attached to the thin left wrist 92, the members 12f and 12P limit the swelling of the opposite portion (the right end portion) 22x of the fluid bladder 22. Accordingly, blood pressure measurement is performed accurately and smoothly.

[0086] Accordingly, the blood pressure monitor 1 can easily perform blood pressure measurement at any wrist size ranging from that of a thick left wrist 91 to that of a thin left wrist 92 due to the second clamping portion 12M moving downward to the left or upward to the left relative to the first clamping portion 11M.

[0087] In the above-described procedure, it was assumed that the blood pressure monitor 1 is attached to a measurement location belonging to the left half of the body (e.g., the left wrist), but there is no limitation. The blood pressure monitor can be attached to a measurement location belonging to the right half of the body (e.g., the right wrist). In this case, the slide hole 13 and the slide rail 14 are arranged on the side near the center of the subject's body, and in this case, on the side near the left hand in the periphery of the measurement location. In this case, the subject can easily close the gap between the first clamping portion 11M and the second clamping portion 12M by pressing the first pressure portion 15 and the second pressure portion 16 with the thumb and another finger of the left hand.Also, the measuring operator can easily open the gap between the first clamping section 11M and the second clamping section 12M by pressing the third pressure section 17 and the fourth pressure section 18 with the thumb and another finger of the left hand. In other words, the operations can be easily performed with the left hand (one hand).

[0088] Fig. 14 shows a schematic block configuration of the blood pressure monitor 1. Included as elements for blood pressure measurement are a CPU (Central Processing Unit) 100 serving as a control unit, a memory 51 serving as a storage unit, a power source unit 53, a pump 32, a valve 33, and a pressure sensor 31, which are incorporated in the main body 10 of the blood pressure monitor 1, together with the above-described display unit 50 and the operation unit 52. Also incorporated in the main body 10 are an oscillation circuit 310 that converts the output signal from the pressure sensor 31 into a frequency, a pump drive circuit 320 that drives the pump 32, and a valve drive circuit 330 that drives the valve 33.

[0089] The display device 50 includes a display, a display element, and the like, and displays the predetermined information according to a control signal from the CPU 100.

[0090] The measurement / stop switch 52A and the recording call switch 52B included in the operation unit 52 input operation signals according to instructions given by the user to the CPU 100.

[0091] The memory 51 stores data of the programs for controlling the blood pressure monitor, data to be used to control the blood pressure monitor 1, setting data for setting various functions of the blood pressure monitor 1, data of blood pressure measurement results, and the like. The memory 51 is also used as a working memory and the like when a program is executed.

[0092] According to the program for controlling the blood pressure monitor 1 stored in the memory 51, the CPU 100 performs the control for driving the pump 32 and the valve 33 in response to an operation signal from the operation unit 52. Also, the CPU 100 calculates the blood pressure value based on the signal from the pressure sensor 31 and controls the display device 50 and the memory 51.

[0093] The power source unit 53 supplies power to the units, namely the CPU 100, the pressure sensor 31, the pump 32, the valve 33, the display device 50, the memory 51, the oscillation circuit 310, the pump driver circuit 320, and the valve driver circuit 330.

[0094] The pump 32 supplies air to the fluid bladder 22 contained within the cuff 20 to increase the pressure (cuff pressure) in the fluid bladder 22. The valve 33 is opened and closed to discharge or seal the air in the fluid bladder 22 and control the cuff pressure. The pump driver circuit 320 drives the pump 32 based on the control signal supplied by the CPU 100. The valve driver circuit 330 opens and closes the valve 33 based on the control signal applied by the CPU 100.

[0095] The pressure sensor 31 and the oscillation circuit 310 function as a pressure detection unit that detects the pressure of the cuff. For example, the pressure sensor 31 is a piezoresistive pressure sensor and is connected to the fluid bladder 22, which is located in the pump 32, the valve 33, and the cuff 20 via an air tube 39. In this example, the oscillation circuit 310 oscillates based on an electrical signal value obtained based on a change in electrical resistance caused by a piezoresistive effect from the pressure sensor 31, and outputs a frequency signal having a frequency corresponding to the electrical signal value of the pressure sensor 31 to the CPU 100.

[0096] When measuring blood pressure according to a general oscillometric method, the following procedure is performed. That is, the cuff is first attached to the measurement site (arm, etc.) of the subject. During the measurement, the pump and valve are controlled to increase the cuff pressure so that it is higher than the systolic blood pressure, after which the cuff pressure is gradually reduced. During the pressure reduction process, the cuff pressure is detected by the pressure sensor, and the variation in arterial capacitance occurring in the arteries at the measurement site is obtained as a pulse signal. Based on the changes (mainly the rising and falling edges) in the amplitude of the pulse signal accompanying the changes in cuff pressure at this time, the systolic blood pressure and the diastolic blood pressure are calculated.

[0097] In the blood pressure measuring device 1, the blood pressure values ​​of the person being measured are measured by the CPU 100, using an oscillometric method according to the procedure described in Fig. 15 is used.

[0098] In particular, when the measurement / stop switch 52A is pressed as shown in Fig. As shown in Figure 15, the blood pressure monitor 1 starts blood pressure measurement. Upon starting blood pressure measurement, the CPU 100 initializes the processing memory area and outputs a control signal to the valve driver circuit 330. Based on the control signal, the valve driver circuit 330 releases the valve 33 to discharge the air into the fluid bladder 22 of the cuff 20. Next, control is performed to adjust the output sensor 31 to 0 mmHg.

[0099] When the blood pressure measurement is started, the CPU 100 first closes the valve 33 via the valve driving circuit 330 and then performs the control for driving the pump 32 via the pump driving circuit 320 and sends air to the fluid bladder 22. Accordingly, the fluid bladder 22 is inflated, and the cuff pressure gradually decreases (step ST101).

[0100] When the cuff pressure is increased and reaches a predetermined value (YES in step ST102), the CPU 100 performs control to stop the pump 32 via the pump driver circuit 320 and thereafter gradually releases the valve 33 via the valve driver circuit 330. Accordingly, the fluid bladder 22 is contracted, and the cuff pressure gradually decreases (step ST103).

[0101] Here, the predetermined pressure is a pressure sufficiently higher than the systolic blood pressure of the subject (e.g., systolic pressure + 30 mmHg), and the predetermined pressure is stored in the memory 51 in advance, or the CPU 100 determines the predetermined pressure by estimating the systolic blood pressure using a predetermined calculation method while increasing the cuff pressure (e.g., see JP 2001-70263A).

[0102] Also for the pressure decrease speed, a target pressure decrease speed, which is a target, is set during inflation of the cuff, and the CPU 100 controls the opening degree of the valve 33 so as to achieve the target pressure decrease speed (see JP 2001-70263A).

[0103] During the pressure reduction process, the pressure sensor 31 detects the cuff pressure signal, which indicates the pressure of the cuff 20 via the cuff 20. Based on the cuff pressure signal, the CPU 100 calculates the blood pressure values ​​(systolic blood pressure and diastolic blood pressure) by applying a known algorithm via the oscillometric method (step ST104). Note that the calculation of the blood pressure values ​​is not limited to being performed during the pressure reduction process and can be performed during the pressure increase process.

[0104] When determining the blood pressure value by calculation (YES in step ST105), the CPU 100 performs control for displaying the calculated blood pressure values ​​on the display device 50 (step ST106) and storing the blood pressure values ​​in the memory 51 (step ST107).

[0105] Next, when the measurement / stop switch 52A is pressed again, the CPU 100 controls the release of the valve 33 via the valve drive circuit 330 and the discharge of the air in the fluid bladder 22 of the cuff 20 (step ST108). Accordingly, the blood pressure measurement is stopped. Modified example

[0106] Fig. Fig. 11 shows the exterior of a blood pressure monitor 1', which includes a cuff (indicated by reference numeral 20') corresponding to a modified example of the cuff 20 described above. Note that in Fig. 11 (and the later described Fig. 12 and Fig. 13) Construction elements which are the same as those in Fig. 1 to 10, are designated by the same reference numerals.

[0107] In the sphygmomanometer 1', coil springs 19A and 19B serving as elastic members are provided between the upper surface member 11 and the lower surface member 12. Specifically, C-shaped hooks 11T and 11U are integrally formed on guide portions 11P and 11Q (formed adjacent to the slide hole 13) provided on the block portion 11N of the upper surface member 11. On the other hand, locking pins 12T and 12U extending in the front-back direction are integrally formed on the substrate portion 12S of the lower surface member 12. The hooks 11T and 11U and the locking pins 12T and 12U are at positions corresponding to each other in the front-back direction. Both the coil springs 19A and 19B have C-shaped hooks 19e and 19f at both ends. The coil spring 19A is stretched between the hook 11T and the locking pin 12T by means of the hooks 19e and 19f.Also, the coil spring 19B is tensioned between the hook 11U and the locking pin 12U by means of the hooks 19e and 19f. The coil springs 19A and 19B apply tensile forces between the block portion 11N of the upper surface member 11 and the substrate portion 12S of the lower surface member 12 in a direction that brings the first tension portion 11M and the second tension portion 12M close to each other. In this example, the tensile forces of the coil springs 19A and 19B when the gap between the first tension portion 11M and the second tension portion 12M is in the open state are set to be sufficiently larger than the friction force between the slide hole 13 and the slide rail 14.

[0108] Also in this example, a known push-push (also referred to as a "push-close - push-open") latching mechanism 40 including a heart-shaped cam (not shown) is provided on the inside of the block portion 11N. When the clamping portion 11N and the end plate portion 12V of the slide rail 14 are brought close to each other due to an external force acting against the tensile forces of the coil springs 19A and 19B, the latching mechanism 40 is taken out in a state where the block portion 11N and the end plate portion 12V are slightly separated from each other, and then, when the block portion 11N and the end plate portion 12V of the slide rail 14 are brought close to each other again due to the external force, the engagement between the block portion 11N and the end plate portion 12V is released.

[0109] Other configurations of the blood pressure monitor 1' are similar to the configurations of the blood pressure monitor 1.

[0110] The blood pressure monitor 1 is attached to the left wrist 90 serving as the measurement site by the following operations (f) to (h). Note that, first, the gap between the first clamping portion 11M and the second clamping portion 12M is in the closed state.

[0111] (f) First, as in Fig. 12(a) (and Fig. 12(B)), which is a right side view), the measuring person slides the slide rail 14 with respect to the slide hole 13 in the direction of opening the gap between the first clamping portion 11M and the second clamping portion 12M, so as to set the gap between the first clamping portion 11M and the second clamping portion 12M in the open state.

[0112] At the time of the opening operation (f), the measuring operator can open the gap between the first clamping portion 11M and the second clamping portion 12M by applying the forces F7 and F8 against the tensile forces F9 and F10 of the springs 19A and 19B by pressing the third pressing portion 17 and the fourth pressing portion 18 with the thumb and another finger of the right hand to bring them close to each other. At this time, the third pressing portion 17 is formed on the front end of the slide rail 14, and the fourth pressing portion 18 is formed adjacent to the slide opening 13, and therefore, the pressing force applied by the slide rail 14 to the slide opening 13 is relatively small, and the pressing force applied by the slide opening 13 to the slide rail 14 is relatively small, similar to the above description regarding the opening operation (d).Thus, the frictional force between the sliding hole 13 and the slide rail 14 is relatively smaller. In addition, since the bends are formed in the cross sections of the first edge 13e1 and the fourth edge 13e4, the frictional force between the sliding hole 13 and the slide rail 14 further decreases. As a result, the measuring operator can easily open the gap between the first clamping portion 11M and the second clamping portion 12M. In other words, the opening operation (f) can be easily performed with one hand.

[0113] In this example, when the measuring operator performs the opening operation (f), the engagement mechanism 40 engages in a state where the block portion 11N and the end plate portion 12V are slightly separated from each other. Accordingly, the open state of the gap between the first clamping portion 11M and the second clamping portion 12M is maintained.

[0114] (g) While maintaining the open condition as in Fig. 12(A) and Fig. 12(B), the measuring person places the left wrist 90 between the first clamping part 11M and the second clamping part 12M.

[0115] At the time of the arrangement process (g), the measuring person arranges the sliding port 13 and the sliding rail 14 on a side near the center of the measuring person's body, and in this case, on a side near the right hand in the periphery of the left wrist 90. Also, the half 90a on the palm side through which the arteries 90u and 90v of the left wrist 90 pass has been directed upward and brought into contact with the fluid bladder 22.

[0116] In the sphygmomanometer 1' similar to the above-described sphygmomanometer 1, the sliding hole 13 and the sliding rail 14 are curved to protrude on the side near the left end portions 11e and 12e of the first clamping portion 11M and the second clamping portion 12M. Accordingly, in the open state, compared with the case where the sliding hole 13 and the sliding rail 14 are directed straight, a gap between the left end portion 11e of the first clamping portion 11M and the left end portion 12e of the second clamping portion 12M is more open. As a result, the assembling operation (g) is easier.

[0117] (h) Next, the measuring person applies the forces F7 and F8 against the tensile forces F9 and F10 of the coil springs 19A and 19B by pressing the third pressure area 17 and the fourth pressure area 18 with the thumb and another finger of the right hand to bring them close to each other. By proceeding as in Fig. 13(A) (and Fig. 13(B), which is a right-side view, the latching mechanism 40 releases the engagement between the block portion 11N and the end plate portion 12V. Accordingly, due to the tensile forces F9 and F10 (which are set to be sufficiently larger than the frictional force between the sliding hole 13 and the slide rail 14) of the coil springs 19A and 19B, the slide rail 14 slides relative to the sliding hole 13 in the direction of closing the gap between the first clamping portion 11M and the second clamping portion 12M, the left wrist 90 is sandwiched between the first clamping portion 11M and the second clamping portion 12M, and the fastened state is assumed.

[0118] Here, since the hooks 11T and 11U, to which the coil springs 19A and 19B apply the tensile forces, are formed adjacent to the slide hole 13 and the locking pins 12T and 12U are formed at positions corresponding to the hooks 11T and 11U, the pressing force applied to the slide rail 14 through the slide hole 13 is relatively small, and the pressing force applied to the slide hole 13 through the slide rail 14 is relatively small. Accordingly, the frictional force between the slide hole 13 and the slide rail 14 is relatively smaller. In addition, since the curvatures are formed in the cross sections of the first edge 13e1 and the fourth edge 13e4, the frictional force between the slide hole 13 and the slide rail 14 further decreases. As a result, the gap between the first clamping portion 11M and the second clamping portion 12M is easily closed.The measuring person does not have to apply an external force to close the gap between the first clamping section 11M and the second clamping section 12M.

[0119] The blood pressure monitor 1' (cuff 20') is attached to the left wrist 90 using the three processes (f) to (h) described above. Accordingly, the blood pressure monitor 1' can be attached using a simpler process compared to the conventional example (which requires five processes).

[0120] In the attached state ( Fig. 13(A) and Fig. 13(B)), which results from performing the above-described three operations (f) to (h) in sequence, the measuring person performs the following operation (i) of instructing the start of the measurement.

[0121] (i) The measurement / stop switch 52A, which serves as the operation switch provided on the main body 10, is pressed to input a blood pressure measurement start instruction to the main body 10. Accordingly, the fluid bladder 22 provided along the inner peripheral surface 11b of the first clamping portion 11M is inflated, and blood pressure measurement is performed (the blood pressure measurement procedure is the same as that described with respect to the blood pressure monitor 1).

[0122] During blood pressure measurement, the fixed state is reliably maintained, similar to the description regarding the blood pressure monitor 1. Also, in the fixed state, due to the tensile forces of the coil springs 19A and 19B, the fluid bellows 22 provided on the inner peripheral surface 11b of the first clamping portion 11M and the inner peripheral surface 12b of the second clamping portion 12M are attached to the left wrist 90 in close proximity to each other. Accordingly, the blood pressure measurement is performed accurately and smoothly.

[0123] After the blood pressure measurement, the blood pressure monitor 1 is removed using the following operations (j) and (k).

[0124] (j) After the measurement is completed, as in Fig.As shown in Fig. 12(A), the measuring operator slides the first clamping portion 11M along the slide rail 14 toward the front end of the slide rail 14 so as to slightly open the gap between the first clamping portion 11M and the second clamping portion 12M. This slight opening operation (j) can be easily performed by applying the forces F7 and F8 against the tensile forces F9 and F10 of the coil springs 19A and 19B by pressing the third pressing portion 17 and the fourth pressing portion 18 with the thumb and another finger of the right hand to bring them close to each other, similarly to the first opening operation (e). Note that in the slight opening operation (j), the gap between the first clamping portion 11M and the second clamping portion 12M opens to such an extent that the latching mechanism 40 does not operate.

[0125] (k) While the gap between the first clamping portion 11M and the second clamping portion 12M is slightly opened due to the forces F7 and F8, the measuring person removes the left wrist 90 from the gap between the first clamping portion 11M and the second clamping portion 12M. In other words, the slightly opening operation (j) and the removal operation (k) are performed simultaneously.

[0126] Thereafter, when the measuring person removes the right hand from the cuff 20', the slide rail 14 slides with respect to the slide hole 13 in the direction of closing the gap between the first clamping portion 11M and the second clamping portion 12M due to the tensile forces F9 and F10 of the coil springs 19A and 19B, and the gap between the first clamping portion 11M and the second clamping portion 12M enters the closed state.

[0127] Note that, instead of the slight opening operation (j), the latching mechanism 40 may open until the block portion 11N and the end plate portion 12V are engaged with each other, similar to the first opening operation (f). In this case, after the removal operation (k), the forces F7 and F8 are applied again against the tensile forces F9 and F10 of the coil springs 19A and 19B by pressing the third pressing portion 14 and the fourth pressing portion 18 with the thumb and another finger of the right hand to bring them close to each other, and the engagement between the block portion 11N and the end plate portion 12V is released using the latching mechanism 40. Accordingly, the tensile forces F9 and F10 of the coil springs 19A and 19B are reduced so as to retain the first clamping section 11M and the second clamping section 12M in the closed state.

[0128] In the above-described procedure, it was assumed that the sphygmomanometer 1' is attached to the measurement site belonging to the left half of the body (e.g., the left wrist), but there is no limitation. The sphygmomanometer 1' can be attached to a measurement site belonging to the right half of the body (e.g., the right wrist). In this case, the sliding port 13 and the sliding rail 14 are arranged on the side near the center of the subject's body, and in this case, on the side near the left hand in the periphery of the measurement site. In this case, the subject can easily perform the operations with the left hand (one hand), similar to the case of the sphygmomanometer 1.

[0129] Also included in the above example are coil springs 19A and 19B as elastic elements, but there is no limitation. The elastic elements only need to apply an elastic force in the direction of bringing the first clamping portion 11M and the second clamping portion 12M close to each other, and these can be, for example, rubber bands.

[0130] Also, in the above example, the latching mechanism 40 is included, but there is no limitation. The latching mechanism 40 may be omitted. In this case, while the gap between the first clamping portion 11M and the second clamping portion 12M is slightly open due to the forces F7 and F8, the test subject places the left wrist 90 between the first clamping portion 11M and the second clamping portion 12M. In other words, the first opening operation (f) and the arrangement operation (g) are performed simultaneously.

[0131] It is also possible to imagine the above-described blood pressure monitors 1 and 1' being mounted on a wrist and thus having integrated forms in which the main unit 10 is integrally attached to the cuff 20 or 20', but there is no limitation to this. For example, it is also possible to use a type in which the blood pressure monitor 1 or 1' is mounted on an upper arm, and thus the cuff 20 or 20' and the main unit 10 are connected by an extended flexible tube.

[0132] The embodiments described above are merely examples, and various modifications are possible without departing from the scope of the invention. Furthermore, the many embodiments described above can be achieved independently or in combination with one another. Furthermore, the various characteristics of the various embodiments can be achieved independently or in combination with one another. List of reference symbols 1.1' blood pressure monitor 10 Main unit 11 Top element 11M first clamping section 12 subpage element 12M second clamping section 13 Sliding opening 13e1 first edge 13e2 second edge 13e3 third edge 13e4 fourth edge 14 Slide rail 15 first printing area 16 second printing area 17 third printing area 18 fourth printing area 20, 20' cuff 21 clamping mechanism 52 Control unit

Claims

[1] Blood pressure measuring cuff (20) comprising a tensioning mechanism (21) located between a substantially rod-shaped measuring location, the tensioning mechanism (21) comprising: a first clamping portion (11M) having a shape curved along a first half of an outer peripheral surface of the measurement location to press the first half side; a second clamping portion (12M) having a shape curved along a second half opposite to the first half of the outer peripheral surface of the measuring location to press the second half side; a sliding opening (13) formed at an end portion (11N) in a circumferential direction (X1) of the first clamping portion (11M) so as to pass through in a passing direction (Y) intersecting with the circumferential direction (X1); and a slide rail (14) extending from one end portion (12S) of the second clamping portion (12M) corresponding to the one end portion (11N) of the first clamping portion (11M) and into the sliding opening (13) of the first clamping portion (11M), fitting therein and sliding with friction relative to the sliding opening (13), wherein the slide opening (13) and the slide rail (14) are curved so as to protrude on one side near other end portions (11e, 12e) of the first clamping portion (11M) and the second clamping portion (12M). [2] The blood pressure measuring cuff (20) according to claim 1, wherein a fluid bladder (22) to be inflated during blood pressure measurement is provided along one or both of an inner peripheral surface of the first clamping portion (11M) and an inner peripheral surface of the second clamping portion (12M). [3] The blood pressure cuff (20) according to claim 1 or 2, wherein a first pressing portion (15) for placing a finger is formed adjacent to the sliding opening (13) on the outer peripheral surface side of the one end portion (11N) of the first clamping portion (11M), and a second pressing portion (16) for placing a finger is formed at a position corresponding to the first pressing portion (15) on the outer peripheral surface side of the one end portion (12S) of the second clamping portion. [4] Blood pressure cuff (20) according to one of claims 1 to 3, wherein a third pressure area (17) for placing a finger is formed on a front end of the slide rail (14), and a fourth pressure portion (18) for placing a finger is formed adjacent to the sliding opening (13) on the inner circumferential surface side of the one end portion (11N) of the first clamping portion (11M). [5] Blood pressure cuff (20) according to one of claims 1 to 4, wherein a cross-section of the sliding opening (13), which is taken orthogonally to the passage direction (Y), is substantially rectangular, and the shape of a cross section of the slide rail (14) taken orthogonally to a direction in which the slide rail (14) extends substantially corresponds to the shape of the cross section of the sliding opening (13). [6] A blood pressure cuff according to claim 5, wherein, within the edges constituting an exit / entrance of the sliding opening (13) on a side away from the second clamping portion (12M) in the passage direction (Y), a second edge (13e2) on a side near the other end portion (11e) of the first clamping portion (11M) is at a position closer to the second clamping portion (12M) in the passage direction than a first edge (13e1) on a side away from the other end portion of the first clamping portion (11M), and / or within the edges constituting an exit / entrance on a side near the second clamping portion (12M) of the sliding opening (13) in the passage direction (Y),a third edge (13e3) on a side away from the other end portion (11e) of the first clamping portion (11M) is at a position further away from the second clamping portion (12M) in the passage direction (Y) than a fourth edge (13e4) on a side near the other end portion (11e) of the first clamping portion (11M). [7] The blood pressure cuff (20) according to claim 6, wherein curvatures in cross sections of the first edge (13e1) and the fourth edge (13e4) are formed so as to reduce friction, and cross sections of the second edge (13e2) and the third edge (13e3) are formed at right angles or acute angles so as to increase friction. [8] Blood pressure cuff according to one of claims 1 to 7, wherein a dimension in the circumferential direction (X2) of the second clamping portion (12M) is set to be smaller than a dimension in the circumferential direction (X1) of the first clamping portion (11M), and the passage direction (Y) of the sliding hole (13) is directed outward in the circumferential direction (X1) with respect to the one end portion (11N) of the first clamping portion (11M) as one approaches the inner circumferential surface side from the outer circumferential surface side of the first clamping portion (11M). [9] A blood pressure measuring cuff (20) according to claim 8, wherein a fluid bladder (22) to be inflated during blood pressure measurement is provided in almost the entire region along the inner peripheral surface of the first clamping portion (11M), and a member that limits the swelling of an opposite portion of the fluid bladder (22) is provided on an inner peripheral surface side of a portion adjacent to the one end portion (12S) of the second clamping portion (12M). [10] Blood pressure measuring cuff (20) according to one of claims 1 to 9, which comprises an elastic element which applies a tensile force between the one end portion (11N) of the first tensioning portion (11M) and the one end portion (12S) of the second tensioning portion (12M). [11] Blood pressure cuff (20) according to claim 10, comprising: a latching mechanism (40) which holds the first clamping portion (11M) and the second clamping portion (12M) in an open state. [12] Blood pressure monitor (1), which comprises: the blood pressure cuff (20) according to claim 1; and a main unit part (10) with an element for incorporating the blood pressure measurement. [13] Blood pressure monitor (1) according to claim 12, wherein the main unit (10) is integrally attached to the blood pressure measuring cuff (20) so as to cover the outer peripheral surface of the first clamping portion (11M), an operation switch for inputting a blood pressure measurement start instruction is provided in an area adjacent to the sliding opening (13) of the first clamping portion (11M) on the outer surface of the main unit (10), and a second pressing portion (16) for placing a finger at a position corresponding to the operation switch is formed on the outer peripheral surface side of the one end portion (12S) of the second clamping portion (12M) of the cuff.

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