JP2006325880A - Cuff - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cuff capable of preventing air leakage. <P>SOLUTION: The cuff is equipped with a leakage preventing tool which presses an elastic member against an outer wall surface of a casing from outside in a manner that the elastic member covering the opened surface of the casing makes close contact with the outer wall surface of the casing. Specifically, the cuff is equipped with the casing with one opened surface, the elastic member covering the opened surface and a part of the outer side surface of the casing to the opened surface to form a pressing surface on the side of the opened surface, and the leakage preventing tool to press the part covering a part of the outer side surface of the elastic member in the direction of the outer side surface of the casing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cuff used in a sphygmomanometer.

  With the aging of society, dealing with adult lifestyle-related diseases has become a major social issue. It is recognized that collection of long-term blood pressure values is very important, especially for diseases associated with high blood pressure. From such a point of view, a measuring apparatus that continuously measures biological information such as a blood pressure value, a pulse, a pulse wave, an electrocardiogram, a body temperature, or arterial oxygen saturation has been developed.

  As a measurement device that continuously measures biological information, there is a patient monitor device that is always attached to the ear canal (see, for example, Patent Document 1). This apparatus calculates a blood pressure value and the like from the amount of received infrared light and visible light scattered into the subject. However, in this patient monitor device, the specific configuration of the sphygmomanometer is not shown. In addition, since no means for preventing air leakage is provided, when using a cuff that expands and presses a part of the subject, the air in the cuff easily leaks.

Here, the names of the auricles are based on Non-Patent Documents 1, 2, and 3.
JP-A-9-128203 Sobotta Illustrated Human Anatomy Volume 1 (Translation by Michio Okamoto), p. 126, Medical School, issued October 1, 1996 Sobotta Illustrated Human Anatomy Volume 1 (Translation by Michio Okamoto), p. 127, Medical School, issued October 1, 1996 Body map book (supervised and commentary by Nagao Takahashi), p. 20, Kodansha Co., Ltd., issued on January 29, 2004

  An object of this invention is to provide the cuff which can prevent the leakage of air.

  In order to achieve the above object, the cuff according to the present invention prevents leakage of the elastic member that covers the open surface of the housing from the outside toward the outer wall surface of the housing so that the elastic member closely contacts the outer wall surface of the housing. A jig is provided.

  Specifically, the cuff according to the present invention covers the casing having one surface open, the opened one surface, and a part of the outer side surface of the casing with respect to the one surface, A telescopic member that forms a pressing surface on the surface side, and a leakage prevention jig that presses a portion that covers a part of the outer side surface of the telescopic member in the direction of the outer side surface of the housing.

  Since the elastic member covering the first surface of the housing expands and contracts, it is possible to increase the air pressure in the housing and press a part of the subject with the pressing surface. At this time, even if the pressure difference between the inside and outside of the housing increases, the leakage prevention jig holds the expansion / contraction member on the external side of the housing, preventing air leakage between the housing and the expansion / contraction member. In addition, it is possible to easily prevent the elastic member from falling off the casing. Therefore, a cuff that can prevent air leakage can be provided.

  It is preferable that the leakage prevention jig is an annular belt that goes around the outside of the elastic member that covers a part of the outer side surface of the housing.

  Since it is annular, it is possible to efficiently hold the elastic member disposed on the outer side surface of the housing. Thereby, the leakage of air from the cuff can be prevented more efficiently.

  It is preferable that the leakage prevention jig is a belt that has a screwing mechanism that fastens the both ends with screws at both ends, and circulates outside the elastic member that covers a part of the outer side surface of the housing.

  Since the distance between both ends can be adjusted using the screwing mechanism, the leakage prevention jig can be configured even with a belt having a small elasticity. Since the belt with small elasticity can keep pressing the elastic member stably for a long time, the leakage of air from the cuff can be prevented more efficiently. Moreover, even a highly elastic member can be stably mounted by a screwing mechanism.

  It is preferable that the leakage prevention jig is a belt that has a hooking mechanism that holds the both end portions with scissors at both ends, and goes around the outside of the elastic member that covers a part of the outer side surface of the housing.

  Since it has a tacking mechanism for fastening both ends, the leakage prevention jig can be easily attached and detached. Thereby, leakage of air can be easily prevented. In addition, it is possible to easily prevent the leakage prevention jig from falling off the casing.

  It is preferable that the leakage prevention jig is a C-shaped elastic body that substantially wraps around the outside of the elastic member that covers a part of the outer side surface of the housing.

  Since it is a C-shaped elastic body, it can be easily attached and detached. In addition, it is possible to easily prevent the leakage prevention jig from falling off the casing.

  It is preferable that the housing further includes a leakage prevention ring that has a groove that circulates around the outer side surface and presses the elastic member that covers a part of the outer side surface of the housing against the groove.

  Since the leakage prevention ring presses the expansion / contraction member in the groove that goes around the outer side surface of the casing, the expansion / contraction member can be brought into close contact with the casing. Further, it is possible to easily prevent the extension member and the leakage prevention jig from falling off the casing.

  It is preferable that the leakage prevention jig and the leakage prevention ring are integrally formed.

  Since the leakage prevention jig and the leakage prevention ring are integrated, it is easy to mount the leakage prevention jig at an appropriate position. Further, the leakage prevention jig can be easily prevented from falling off. Moreover, the leakage prevention jig can efficiently hold down the leakage prevention ring.

  It is preferable that the elastic member and the leakage prevention ring are integrally formed.

  Since the elastic member and the leakage prevention ring are integrated, it is possible to easily prevent the elastic member from falling off. Moreover, it becomes easy to mount the elastic member and the leakage prevention jig at appropriate positions.

  It is preferable that the expansion member, the leakage prevention jig, and the leakage prevention ring are integrally formed.

  Since the expansion / contraction member, the leakage prevention jig, and the leakage prevention ring are integrated, it is easy to mount the expansion / contraction member, the leakage prevention jig, and the leakage prevention ring in the groove of the casing. Thereby, since it becomes easy to attach an expansion-contraction member, a leakage prevention jig | tool, and a leakage prevention jig | tool to an appropriate position, the leakage of the air from a cuff can be prevented more efficiently. Further, it is possible to easily prevent the extension member, the leakage prevention jig, and the leakage prevention ring from falling off.

  Further, the cuff according to the present invention covers the casing having one surface open, the opened one surface, and a part of the outer side surface of the casing with respect to the one surface, and the side of the first surface. A telescopic member that forms a pressing surface, and a sandwiching portion that is configured integrally with the housing on the outer side surface of the housing and that covers a part of the outer side surface of the telescopic member between the outer side surface of the housing, and It is characterized by providing.

  Since the elastic member covering the first surface of the housing expands and contracts, it is possible to increase the air pressure in the housing and press a part of the subject with the pressing surface. At this time, even if the pressure difference between the housing and the outside of the housing increases, the sandwiching portion holds the elastic member on the outer side of the housing, preventing air leakage between the housing and the elastic member, In addition, it is possible to easily prevent the elastic member from falling off the casing. Therefore, a cuff that can prevent air leakage can be provided.

  It is preferable that the housing further includes a leakage prevention ring that has a groove that circulates around the outer side surface and presses the elastic member that covers a part of the outer side surface of the housing against the groove.

  Since the leakage prevention ring presses the expansion / contraction member in the groove that goes around the outer side surface of the casing, the expansion / contraction member can be brought into close contact with the casing. In addition, it is possible to easily prevent the elastic member from falling off the casing.

  It is preferable to further include a pressing mechanism that presses the sandwiching portion in the direction of the outer side surface of the casing.

  Since the pressing mechanism presses the sandwiching portion against the outer side surface of the housing, it is possible to easily prevent the elastic member from falling off. Moreover, since the force by which the sandwiching portion presses the expansion / contraction member can be increased, leakage of air from the cuff can be more efficiently prevented.

  The open one surface is preferably circular.

  Since the open surface of the casing is circular, the uniformity of the pressing pressure on the pressing surface can be maintained. Moreover, since the expansion / contraction member can be expanded and contracted uniformly, the leakage of air from a specific part of the outer side surface of the housing can be prevented.

  The open one surface is preferably elliptical or oval.

  Since the open surface of the housing is oval or oval, the cuff can be attached along the artery even to a narrow portion while maintaining the uniformity of the pressing pressure on the pressing surface.

  According to the present invention, since the leakage prevention jig that presses the elastic member that presses the subject toward the outer wall surface of the housing is provided, a cuff that can prevent air leakage can be provided.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below is an example of the configuration of the present invention, and the present invention is not limited to the following embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a cuff according to the first embodiment. The cuff 91 shown in FIG. 1 covers the casing 11 with one surface 31 open, and the opened one surface 31 and a part of the outer side surface 32 of the casing with respect to the first surface 31. The expansion / contraction member 12 that forms the pressing surface 33 on the side 31, and the leakage prevention jig 13 that presses the portion 34 where the expansion / contraction member 12 covers a part of the outer side surface 32 of the casing in the direction A of the outer side surface 32 of the casing. Prepare.

  The cuff 91 includes a leakage prevention ring 14 that presses the elastic member 12 covering a part of the outer side surface 32 of the housing against the groove 35 of the housing 11, and an air flow path 15 that supplies or discharges air into the housing 11. In FIG. 1, the subject 101 pressed by the pressing surface 33 is shown.

  In addition, in FIG. 1, the expansion-contraction member 12 and the leakage prevention ring 14 are arrange | positioned between the housing | casing 11 and the leakage prevention jig 13, However, It is not restricted to this. The leakage prevention ring 14 may not be disposed between the housing 11 and the leakage prevention jig 13. For example, the leakage prevention jig 13 may be disposed on the pressing surface 33 side with respect to the leakage prevention ring 14 or may be on the opposite side. Further, the position to which the air flow path 15 is connected does not have to be the bottom portion 36 of the casing, and may be the outer side surface 32 of the casing, for example.

  The housing 11 is, for example, a container in which one surface 31 is opened. It is preferable that the container not be deformed by the force from the leakage prevention jig 13 and the leakage prevention ring 14. For example, it is made of metal or plastic. The shape of the container is not limited, and for example, there is a bottomed cylinder.

  FIG. 2 is a top view showing a first form of the housing. The first casing 11a shown in FIG. 2 has a single open surface 31 that is circular. The first housing 11a does not have the groove 35 of the housing 11 shown in FIG. 1, and the air flow path 15 is connected to the bottom surface. The opened one surface 31 is, for example, a projection shape on the pressing surface 33 of the opening of the housing 11. Moreover, it is good also as a shape of the outer wall surface of the opening part of the housing 11. FIG. The size of the circle is not limited and is preferably set according to the area where the subject is pressed. If one open surface 31 of the casing 11 is circular, the uniformity of the pressing pressure of the pressing surface 33 shown in FIG. 1 can be maintained. Moreover, the expansion-contraction member 12 can be expanded-contracted equally. If the expansion and contraction member expands and contracts evenly, air leakage from a specific part of the outer side surface of the housing can be prevented, so that air leakage from the cuff can be more efficiently prevented.

  FIG. 3 is a top view showing a second form of the housing. As for the 2nd housing | casing 11b shown in FIG. 3, the open | released 1 surface 31 is an ellipse. The second housing 11b does not have the groove 35 shown in FIG. 1, and the air flow path 15 is connected to the bottom surface. The oval shape is not limited. For example, as shown in FIG. 3, the end in the minor axis direction may be linear. Moreover, an ellipse may be sufficient. Since the open one surface 31 of the housing 11 shown in FIG. 1 is oval or oval, the pressure on the pressing surface 33 is kept uniform and the narrow portion is also along the artery. A cuff 91 can be attached.

  FIG. 4 is a pickup diagram of the housing 11 shown in FIG. The housing 11c shown in FIG. 4 has a groove 35 that goes around the outer side surface 32 of the housing on the outer side surface 32 of the housing 11c. The cross-sectional shape of the groove 35 may be, for example, a part of a circle such as a semicircular shape as shown in FIG. 4, or may be a quadrangle, a trapezoid, or a triangle. Further, the depth of the groove 35 is not limited, and may be deeper or shallower than the thickness of the leakage preventing ring 14. Since the housing 11c has a groove that goes around the outer side surface 32, the elastic member 12 and the housing 11 can be easily adhered to each other. Further, the cuff 91 shown in FIG. 1 can prevent the leakage prevention ring 14 and the leakage prevention jig 13 from moving to the opened one surface 31 side. 11 can be easily prevented from falling off.

  The air flow path 15 shown in FIG. 1 is a hollow tube that supplies or discharges air to the inside 1 of the housing. As the hollow tube, for example, a resin such as silicon, a rubber, or a metal can be used. The cross-sectional shape of the hollow tube is not limited, and may be, for example, circular or square. The hollow tube is preferably made of a flexible material such as resin or rubber. If it is flexible, the burden on the subject when the arm is attached can be reduced.

  The elastic member 12 covers a part of the opened one surface 31 and the outer side surface 32 of the housing with respect to the one surface 31, and forms a pressing surface 33 on the one surface 31 side. The stretchable member 12 is a stretchable member such as resin or rubber. In addition, the elastic member 12 may be one that has elasticity by folding the member in a pleat shape. As a material of the elastic member 12, for example, resin, rubber, cloth or paper can be used. The resin may be a general-purpose plastic material such as polyethylene, polypropylene, polyvinyl chloride, polyvinyl acetate, or a copolymer thereof. Examples of the rubber include natural rubber, styrene rubber, butyl rubber, nitrile rubber, chlorobutylene rubber, naobylene rubber, ethylene / propylene rubber, hyperon, acrylic rubber, urethane rubber, silicone rubber, and fluorine rubber. The cloth or paper is preferably airtight, for example, a nonwoven fabric coated with a polymer. Moreover, the material of the expansion / contraction member 12 may transmit light such as silicon resin. In addition, the elastic member 12 is preferably made of an elastic material such as silicon resin, natural rubber, or butyl rubber. The member may be stretched by folding the member in a pleated shape. It has an area that covers a part of the first surface 31 and the outer side surface 32 and is flexible and can be bent from the first surface 31 to the outer side surface 32. In addition, the elastic member 12 may have a shape that matches the shape of the one surface 31 and the outer side surface 32. In addition, it does not need to be comprised with one member and may be comprised with two or more members. In this case, at least the portion that becomes the pressing surface only needs to have elasticity as a whole.

  The leak prevention ring 14 presses the elastic member 12 covering a part of the outer side surface 32 of the housing in the groove 35. That is, the leakage prevention ring 14 applies a force in the direction A to the elastic member 12. As the leakage prevention ring 14, for example, an annular elastic body having a restoring force in the direction A can be used. As the elastic body, there is rubber or a spring. The cross-sectional shape of the ring may be a circle or a square such as a quadrangle. Since the leak prevention ring 14 which presses the elastic member 12 to the said groove | channel is further provided, it becomes easy to make the elastic member 12 contact | adhere to the housing | casing 11. FIG. Further, it is possible to easily prevent the expansion member 12 and the leakage prevention jig 13 from falling off the casing 11.

  FIG. 5 is a schematic view showing another embodiment of the elastic member. The elastic member 12b shown in FIG. 5 is configured by integrating the elastic member 12 and the leakage prevention ring 14 shown in FIG. For example, as shown in the drawing, the elastic member 12b can be configured such that the end of the elastic member entrains the leakage prevention ring 14. The elastic member 12b may be integrated with the leakage prevention ring 14 with an adhesive. Moreover, you may integrate with fasteners, such as a nail or a screw. The expansion / contraction member 12b may be composed of the same member as the leakage prevention ring 14. For example, the end of the elastic member 12b may be thick in a ring shape. Since the expansion / contraction member 12b has the leak prevention ring 14 formed integrally, it is easy to fix at the position of the groove 35 of the housing 11 shown in FIG. 1, and the expansion / contraction member 12 and the leakage shown in FIG. It becomes easy to mount the prevention jig 13 at an appropriate position. Thereby, the leakage of air from the cuff can be prevented more efficiently. In addition, it is possible to easily prevent the elastic member 12 and the leakage prevention jig 13 shown in FIG. 1 from falling off.

  The leakage prevention jig 13 shown in FIG. 1 presses the outer side 34 of the elastic member in the direction A of the outer side surface 32 of the housing. The outer side 34 of the elastic member is the outer side of the elastic member 12 that covers a part of the outer side surface 23 of the housing.

  FIG. 6 is a schematic diagram showing a first form of the leakage preventing jig. The leakage prevention jig 13a shown in FIG. 6 is an annular belt 41 that goes around the outer side 34 of the elastic member 12 that covers a part of the outer side surface 32 of the housing shown in FIG. As shown in FIG. 1, it may circulate around the outside of the leakage prevention ring 14. The belt 41 is a belt-like body that can surround the outer side 34 of the elastic member. The belt-like body may be made of a member having high elasticity such as rubber or resin, or may be made of a member having low elasticity such as metal. Although the shape of the belt 41 is not limited, it is preferable to have a groove 35 for fixing the leakage prevention ring 14 in the direction A when pressing from the leakage prevention ring 14 to the outer side surface 32 of the housing. Since the leakage prevention jig 13a is a ring-shaped member formed into an annular shape, it is preferable that the leakage prevention jig 13a has elasticity in which a restoring force acts in the direction A shown in FIG. For example, rubber has elasticity. Since the leakage preventing jig 13a is annular, the telescopic member 12 can be pressed from the entire circumference of the outer side surface 32 of the housing. Thereby, the leakage of air from the cuff 91 can be prevented more efficiently.

  FIG. 7 is a schematic view showing a second form of the leakage preventing jig. The leakage prevention jig 13b shown in FIG. 7 has a screwing mechanism for fastening the end 51a and the end 51b with screws 42 at both ends 51a and 51b, and a part of the outer side surface 32 of the housing shown in FIG. This is a belt 41 that goes around the outer side 34 of the elastic member 12 to be covered. The belt 41 can be the same as that described in the first embodiment of the leakage preventing jig. The screw 42 is fixed at the end 51a and the end 51b of the belt 41. The end portion 51a and the end portion 51b may be provided with a hole through which the screw 42 penetrates, or the screw 42 may be fixed to either one. The leakage prevention jig 13b has a screwing mechanism for fastening the both end portions 51a and 51b, so that the distance B between the both end portions 51a and 51b can be adjusted. The distance B can be shortened by this screwing mechanism, and the elastic member 12 can be pressed in the direction A shown in FIG. Thereby, even if it is the belt 41 of a member with small elasticity, such as a metal, leather, and cloth, the leak prevention jig | tool 13 can be comprised. If the belt 41 is a member having a small elasticity, the elastic member 12 can be held down stably over a long period of time. Moreover, even if it is a member with big elasticity, the leak prevention jig | tool 13 can be mounted | worn stably.

  FIG. 8 is a schematic diagram showing a third form of the leakage preventing jig. The leakage prevention jig 13c shown in FIG. 8 has a hooking mechanism for fastening the end 52a and the end 52b with both ends at both ends 52a and 52b, and covers a part of the external side surface 32 of the casing shown in FIG. A belt 41 that goes around the outer side 34 of the elastic member 12. The belt 41 can be the same as the belt 41 described with reference to FIG. For example, the flange 53 is configured such that the convex portion 53 in the circumferential direction of one end portion 52a is engaged with the concave portion 54 in the circumferential direction of the other end portion 52b. The shape of a convex part and a recessed part is not limited. The shapes of the convex part and the concave part do not have to be fitted, for example, the C-shaped end part may be the convex part, and the C-shaped inner part may be the concave part. Moreover, although the convex part and the recessed part are one each, two or more may be sufficient. Only two or more convex parts may be sufficient, and only two or more concave parts may be sufficient. Further, the end portion 52a and the end portion 52b may be members different from the belt 41, but may be the same member. Since it has a tacking mechanism for fastening the end 52a and the end 52b, the leakage prevention jig 13c can be easily attached and detached. Thereby, the leakage prevention jig 13 shown in FIG. 1 can be easily prevented from falling off from the housing 11 and air leakage from the inside 1 of the housing can be easily prevented. Furthermore, if there are two or more convex portions and concave portions, the force for pressing the expansion / contraction member 12 can be varied by changing the portion where the hook is applied.

  FIG. 9 is a schematic view showing a fourth form of the leakage preventing jig. The leakage prevention jig 13d shown in FIG. 9 is a C-shaped elastic body that substantially wraps around the outer side 34 of the elastic member 12 that covers a part of the outer side surface 32 of the housing shown in FIG. Examples of the elastic body can be those described in the above-described leakage prevention ring 14. In FIG. 9, the housing 11 is shown with an open one surface having an elliptical shape, and the elastic member is omitted. The C-shaped elastic body preferably has a shape along the shape of the opened one surface. Further, the C-shaped elastic body is preferably larger than a half circumference as shown in FIG. Since the C-shaped elastic body makes a substantially half turn around the outside of the elastic member, the elastic member can be held by the housing 11. Since the leakage preventing jig 13d is a C-shaped elastic body, it can be easily attached and detached. Thereby, leakage of air can be easily prevented. Further, it is possible to easily prevent the leakage prevention jig 13b from falling off the casing 11.

  FIG. 10 is a schematic diagram showing a fifth form of the leakage preventing jig. The leakage prevention jig 13e shown in FIG. 10 is a container that covers the bottom portion 36 of the housing 11 and a part of the outer side surface 32 from the outside of the elastic member 12. Moreover, it is good also as a U-shaped arm which covers a part of bottom part 36 of the housing 11, and a part of external side surface 32. FIG. Since the leakage prevention jig 13e covers a part of the outer side surface 32 and a part of the bottom 36 of the housing 11, the leakage prevention jig 13e can be prevented from falling off.

  FIG. 11 is a schematic diagram showing a sixth form of the leakage preventing jig. The leakage prevention jig 13f shown in FIG. 11 is configured by integrating the leakage prevention jig 13 and the leakage prevention ring 14 described in FIG. The integral type may be composed of the same member, but may be composed of different members. For example, it may be integrated with an adhesive, or may be integrated with a fastener such as a nail or a screw. Since the leakage prevention jig and the leakage prevention ring are integrated, the leakage prevention jig 13 shown in FIG. 1 can be easily mounted in the groove 35 provided on the outer side surface 32 of the housing. Further, the leakage prevention jig 13 can be easily prevented from falling off. Further, the leakage prevention jig 13 can efficiently hold the leakage prevention ring 14.

  Furthermore, the expansion / contraction member 12, the leakage prevention jig 13, and the leakage prevention ring 14 may be configured as an integral type. The integral type may be integrated with an adhesive, or may be integrated with a fastener such as a nail or a screw. Since the expansion / contraction member 12, the leakage prevention jig 13, and the leakage prevention ring 14 are integrated, it is easy to attach the expansion / contraction member 12, the leakage prevention jig 13 and the leakage prevention ring 14 to the groove 35 of the housing 11. Thereby, since it becomes easy to attach the expansion-contraction member 12, the leakage prevention jig | tool 13, and the leakage prevention jig | tool 13 in an appropriate position, the leakage of the air from the cuff 91 can be prevented more efficiently. Further, it is possible to easily prevent the expansion member 12, the leakage prevention jig 13, and the leakage prevention ring 14 from falling off.

  The operation of the sphygmomanometer using the cuff 91 shown in FIG. 1 will be described with reference to FIGS. FIG. 12 is a graph showing a measurement example of a blood pressure value, where (a) shows a time transition of pressure and (b) shows a time transition of pulse wave signal amplitude. FIG. 12A shows a periodic internal arterial pressure 61 of the subject due to the heartbeat and a pressing pressure value 62 that is a pressure with which the pressing surface 33 presses the subject 101. A pulsation waveform 63 shown in FIG. 12B is a pulsation waveform of the subject 101.

  An air pump (not shown) starts intake and supplies air to the inside 1 of the housing via the air flow path 15. In the cuff supplied with air, the pressure inside the housing 1 increases, and the pressing surface 33 of the expandable member 12 expands toward the subject 101. An air pump (not shown) increases the pressing pressure value 62 to the pressure value P0. Here, the pressure value P0 is a pressure that stops the blood flow in the artery, and the time at this time is T0. At time T0, the pulsation waveform 63 is hardly detected.

  Here, the leakage prevention ring 14 presses the expansion / contraction member 12 at a portion of the groove 35 on the outer side surface 32 of the housing. The leakage prevention jig 13 holds the leakage prevention ring 14 in the direction A of the external side surface 32 of the housing. Thereby, between the outer side surface 32 of the housing and the elastic member 12, it is possible to prevent leakage of air inside the housing 1 to the outside of the housing 11. Furthermore, since air leakage to the outside of the housing 11 can be prevented, the cuff 91 can efficiently press the subject 101 with the pressing surface 33.

  The air pump (not shown) starts exhausting from time T0 and gradually decreases the pressing pressure value 62. Blood begins to flow to the subject 101 from time T1 when the pressing pressure value 62 becomes equal to the maximum value of the arterial pressure 61, and a pulsation waveform 63 appears. The pressing pressure value 62 at this time T1 becomes the systolic blood pressure value P1. From time T1, the amplitude of the pulsation waveform 63 gradually increases and becomes maximum at time T2. The pressing pressure value 62 at this time T2 becomes the diastolic blood pressure value P2 of the intra-arterial pressure 61. In this manner, the systolic blood pressure value P1 and the diastolic blood pressure value P2 can be determined and the blood pressure value can be measured. Note that the method of measuring the blood pressure value is not limited to the above.

  As described above, the cuff 91 according to the present embodiment expands and contracts the elastic member 12 that covers the first surface 31 of the casing 11, so that the air pressure in the casing 11 is increased and a part of the subject 101 is pressed. It can be pressed by the surface 33. At this time, even if the pressure difference between the inside of the housing 11 and the outside of the housing 11 becomes large, the leakage prevention jig 13 holds down the expansion / contraction member 12 on the external side surface 32 side of the housing. The air leakage from the housing 11 can be prevented, and the dropout of the elastic member 12 from the housing 11 can be easily prevented. Moreover, since the air inside the housing 1 does not leak, the pressing surface 33 can be efficiently expanded. Therefore, it is possible to provide the cuff 91 that can prevent air leakage. Furthermore, since the pressing pressure value at which the pressing surface 33 presses the subject 101 can be stabilized, the blood pressure value of the subject 101 can be accurately measured.

(Embodiment 2)
FIG. 13 is a cross-sectional view of the cuff according to the second embodiment. The cuff 92 shown in FIG. 13 covers the housing 16 with one surface 31 open, and the opened one surface 31 and a part of the outer side surface 38 of the housing with respect to the first surface 31. A telescopic member 12 that forms a pressing surface 33 on the side of 31, and a sandwiching part 37 that is formed integrally with the housing 16 on the outer side surface 38 of the housing, and sandwiches a part of the elastic member 12 with the outer side surface 38 of the housing. Prepare. The cuff 92 further includes a leakage prevention ring 14 that presses the elastic member 12 covering a part of the outer side surface 38 of the housing into the groove 35. Here, the part of the elastic member 12 is a part of the elastic member 12 covering a part of the outer side surface 38 of the housing.

  The elastic member 12 can be the same as that described in the first embodiment.

  The casing 16 is obtained by providing the sandwiching portion 37 in the casing 11 described in the first embodiment. The sandwiching portion 37 is configured integrally with the housing 16 on the outer side surface 38 of the housing, and sandwiches a part of the elastic member 12 with the outer side surface 38 of the housing. It is preferable that the sandwiching portion 37 and the outer side surface 32 can be opened and closed. If the opening and closing can be performed, the extension member 12 can be easily incorporated into the housing 16. Since the sandwiching portion 37 sandwiches a part of the elastic member 12, a part of the elastic member 12 can be brought into close contact with the outer side surface 38 of the housing.

  Moreover, it is preferable that the housing 16 has the groove | channel 35 which goes around the outer side surface 38 of a housing. As the groove 35 that goes around the outer side surface 38 of the housing, the same groove as that described in the first embodiment can be used.

  The leakage prevention ring 14 presses the elastic member 12 covering a part of the outer side surface 38 of the housing in the groove 35. The leak prevention ring 14 can be the same as that described in the first embodiment. Since the expansion / contraction member 12 includes the leakage prevention ring 14 that presses against the groove 35 of the casing 16, the expansion / contraction member 12 can be brought into close contact with the casing 16. Thereby, since the sandwiching part 37 can hold down a certain part of the outer side surface 38 of the housing, it is possible to more efficiently prevent air leakage from the cuff 92.

  As described above, in the cuff 92 according to the present embodiment, since the elastic member 12 covering the one surface 31 of the casing expands and contracts, the air pressure in the casing 16 is increased and a part of the subject is pressed by the pressing surface 33. Can be pressed. At this time, even if the pressure difference between the inside of the housing 16 and the outside of the housing 16 increases, the sandwiching portion 37 holds the elastic member 12 on the outer side surface 38 side of the housing, so that the space between the housing 16 and the elastic member 12 can be reduced. Air leakage can be prevented. Therefore, a cuff that can prevent air leakage can be provided. Furthermore, since the sandwiching portion 37 is integrated with the housing 16, it is possible to easily prevent the stretchable member 12 and the leakage prevention ring 14 from falling off.

(Embodiment 3)
FIG. 14 is a cross-sectional view of the cuff according to the third embodiment. The cuff 93 shown in FIG. 14 further includes a pressing mechanism 18 that presses the sandwiching portion 37 described in FIG. 13 in the direction A of the outer side surface 38 of the housing. In FIG. 14, the sandwiching portion 37 described with the cuff 92 is omitted. The cuff 93 includes a pedestal 57 a that holds the housing 11 and the leakage prevention ring 14, and a pedestal 57 b that holds the pedestal 57 a and the pressing mechanism 18.

  FIG. 15 is an example of the leakage prevention ring 14, (a) is a top view, and (b) is a side view. FIG. 16 is an example of the elastic member 12, (a) is a top view, and (b) is a side view. FIG. 16 shows a state in which the elastic member 12 is attached to the housing 11 shown in FIG. As shown in FIGS. 15 and 16, the leakage prevention ring 14 shown in FIG. 14 is an annular body that presses the outer side surface of the elastic member 12 covering the periphery of the circular housing 16 in the direction A. The leak prevention ring 14 can be the same as the leak prevention ring 14 described in the first embodiment.

  The pressing mechanisms 18a and 18b shown in FIG. 14 press the sandwiching portion 37 in the direction A of the outer side surface 38 of the housing. For example, it may include pressing parts 55a and 55b that hold a sandwiching part (not shown) from above the leakage prevention ring 14 and rotating parts 56a and 56b that are fixed to the pedestal 57b and rotate the pressing part 55. The pressing portions 55a and 55b press the leakage prevention ring 14, for example. For example, it is a rod-shaped body formed of a member having high strength such as metal or reinforced plastic. The rotating portions 56a and 56b are, for example, for rotating the pressing portions 55a and 55b and pressing the leakage preventing ring 14 in the direction A. The rotation unit 56 may include a spring that continues to apply a force in the direction A of the leakage prevention ring 14. Moreover, the rotation part 56 may be fixed at an angle for pressing the leakage prevention ring 14. In FIG. 14, the example in which the pressing mechanism 18 is two has been described, but the pressing mechanism 18 may be three or more.

  As described above, in the cuff 93 according to the present embodiment, since the pressing mechanism 18 presses the sandwiched portion against the outer side surface 38 of the housing, it is possible to easily prevent the elastic member 12 from falling off. Moreover, since the force which the clamping part 37 presses the expansion-contraction member 12 can be strengthened, the leakage of the air from the cuff 93 can be prevented more efficiently.

  The present invention can prevent leakage of air from a casing whose opening is covered with an elastic member, and thus can be used as a cushion for keeping the pressure to be pressed constant.

1 is a cross-sectional view of a cuff according to a first embodiment. It is a top view which shows the 1st form of a housing. It is a top view which shows the 2nd form of a housing. It is a pick-up figure of a housing. It is a schematic diagram which shows the other form of an expansion-contraction member. It is a schematic diagram which shows the 1st form of a leak prevention jig | tool. It is a schematic diagram which shows the 2nd form of a leakage prevention jig | tool. It is a schematic diagram which shows the 3rd form of a leakage prevention jig | tool. It is a schematic diagram which shows the 4th form of a leakage prevention jig | tool. It is a schematic diagram which shows the 5th form of a leakage prevention jig | tool. It is a schematic diagram which shows the 6th form of a leakage prevention jig | tool. It is a graph which shows the example of a blood pressure value measurement, (a) shows a time transition of pressure, and (b) shows a time transition of pulse wave signal amplitude. It is sectional drawing of the cuff which concerns on Embodiment 2. FIG. It is sectional drawing of the cuff which concerns on Embodiment 3. FIG. It is an example of a leak prevention ring, (a) is a top view, (b) shows a side view. It is an example of an expansion-contraction member, (a) shows a top view and (b) shows a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inside of a housing 11, 16 Housing 12 Expansion / contraction member 13 Leakage prevention jig 14 Leakage prevention ring 15 Air flow path 18 Pressing mechanism 31 The 1 surface 32 where the housing was opened 32, 38 The outer side surface of the housing 33 Pressing surface 34 Outer side 35 Groove of housing 36 Bottom portion of housing 37 Clamping portion 41 Belt 42 Screw 51, 52 End portion 53 Convex portion 54 Recessed portion 55 Pressing portion 56 Rotating portion 57 Base 61 Intra-arterial pressure 62 Pressing pressure value 63 Pulsation waveform 91, 92, 93 Cuff 101 Subject A Pressing direction B Distance between both ends

Claims (14)

A housing with one side open,
An elastic member that covers a part of the opened one surface and a part of the outer side surface of the casing relative to the one surface, and forms a pressing surface on the one surface side;
A leakage prevention jig that holds a part of the elastic member that covers a part of the outer side surface in the direction of the outer side surface of the casing.   2. The cuff according to claim 1, wherein the leakage prevention jig is an annular belt that goes around the outside of the elastic member that covers a part of the outer side surface of the housing.   The leakage prevention jig is a belt that has a screwing mechanism for fastening the both ends with screws at both ends, and wraps around the outside of the elastic member that covers a part of the outer side surface of the housing. The cuff according to claim 1.   The leakage prevention jig is a belt that has a hooking mechanism for fastening the both ends with scissors at both ends, and circulates around the outside of the elastic member that covers a part of the outer side surface of the housing. The cuff according to claim 1.   2. The cuff according to claim 1, wherein the leakage prevention jig is a C-shaped elastic body that substantially wraps around the outside of the elastic member that covers a part of the outer side surface of the housing. The housing has a groove that goes around the outer side surface,
The cuff according to any one of claims 1 to 5, further comprising a leakage prevention ring that presses the expansion and contraction member covering a part of the outer side surface of the casing into the groove.   The cuff according to claim 6, wherein the leakage prevention jig and the leakage prevention ring are integrally formed.   The cuff according to claim 6, wherein the expansion member and the leakage prevention ring are configured as an integral type.   The cuff according to claim 6, wherein the expansion member, the leakage prevention jig, and the leakage prevention ring are integrally formed. A housing with one side open,
An elastic member that covers a part of the opened one surface and a part of the outer side surface of the casing relative to the one surface, and forms a pressing surface on the one surface side;
A cuff comprising: a sandwiching portion that is formed integrally with the housing on the outer side surface of the housing, and that sandwiches a portion that covers a part of the outer side surface of the elastic member with the outer side surface of the housing. The housing has a groove that goes around the outer side surface,
The cuff according to claim 10, further comprising a leakage prevention ring that presses the expansion and contraction member covering a part of the outer side surface of the casing into the groove.   The cuff according to claim 10, further comprising a pressing mechanism that presses the sandwiching portion in the direction of the outer side surface of the casing.   The cuff according to claim 1, wherein the open one surface is circular. The cuff according to any one of claims 1 to 12, wherein the open one surface is oval or oval.

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