JP2011212159A - Wrist-mount sphymomanometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrist-mount sphymomanometer, enabling the cuff to be attached in a correct position for use.SOLUTION: This wrist-mount sphymomanometer includes: the cuff 31 having an air bag 41 which is supplied with the air to be inflatable/deflatable and takes a tubular shape when being wrapped round a subject's wrist; an inflation/deflation mechanism section for inflating and deflating the air bag 41; and a body case 20 disposed along the circumference of the wrist with the cuff 31 wrapped around the wrist. The body case 20 contains the inflation/deflation mechanism section. One end 32 of the cuff 31 in the circumferential direction thereof is fixed to the body case 20. The body case 20 has an engagement mechanism section 71 with which the other end 33 of the cuff 31 in the circumferential direction thereof is engaged to hold the cuff 31 in a state in which the cuff 31 is wrapped around the wrist.

Description

  The present invention generally relates to a wrist sphygmomanometer, and more particularly to a wrist sphygmomanometer that performs blood pressure measurement with a cuff attached to a wrist of a subject.

  Regarding a conventional wrist type sphygmomanometer, for example, Japanese Patent Application Laid-Open No. 2003-24286 discloses that an artery located on a wrist is surely compressed without being affected by muscles, tendons and bones existing on the wrist. A wrist-type sphygmomanometer cuff is disclosed (Patent Document 1). The wrist-type sphygmomanometer cuff disclosed in Patent Document 1 stores a first air bag, a first air bag, and a first air bag that are used to compress air sent from a pressurizing pump and compress an artery in a wrist part. And a second air bag made of a material having higher elasticity than the first air bag.

JP 2003-24286 A

  As disclosed in the above-mentioned patent documents, wrist type sphygmomanometers that perform blood pressure measurement by attaching a cuff to the wrist of a subject are widely used. Such a wrist sphygmomanometer includes an air bag accommodated in the cuff and a housing provided with a pump for supplying air to the air bag. When blood pressure is measured, air is supplied from the pump to the air bag to compress the two arteries, the radial artery and the ulnar artery, present in the wrist on the palm side.

  On the other hand, wrist blood pressure monitors need to handle a wide range of people from thin to thick wrists, so the center of the air bag in the wrist circumference direction is generally placed on the palm side of the hand where the artery to be compressed is located Is. In this case, the casing in which the pump is provided is also arranged on the palm side or on the side of the hand.

  However, a person who uses a wrist blood pressure monitor for the first time may place the casing on the back side of the hand and attach the cuff to the wrist in the same manner as a wristwatch that is familiar to the wrist. In this case, the subject's artery is not appropriately compressed by the air bag, and there is a problem that accurate blood pressure measurement cannot be performed.

  Accordingly, an object of the present invention is to solve the above-described problems and to provide a wrist type sphygmomanometer in which a cuff is worn according to a correct usage pattern.

  A wrist sphygmomanometer according to the present invention has a cuff that takes a cylindrical shape by being wound around a wrist of a subject, an expansion / contraction mechanism, and a wrist circumference with the cuff being wound around the wrist. A housing disposed on the top. The cuff has an expandable / contractable fluid bag to which fluid is supplied. The expansion / contraction mechanism part expands / contracts the fluid bag. The housing accommodates the expansion / contraction mechanism. One end of the cuff in the circumferential direction is fixed to the housing. The housing includes a locking mechanism portion that locks the other end of the cuff in the circumferential direction and holds the cuff wound around the wrist.

  According to the wrist type sphygmomanometer configured as described above, one end in the circumferential direction of the cuff is fixed to the casing, and the other end in the circumferential direction of the cuff has the casing when the cuff is attached to the wrist. Locked by the locking mechanism. In such a configuration, assuming a usage pattern of the cuff in which the casing is arranged on the wrist on the back side of the hand, the cuff circulates around the wrist starting from the back side of the hand, and again toward the back side of the hand. Accordingly, regardless of whether the wrist circumference of the subject is large or small, the fluid bag that the cuff has can be more reliably placed on the wrist on the palm side where the artery to be compressed exists.

  As a result, it is possible to adopt a cuff usage pattern in which a case is arranged on the back side of the hand, which is considered most familiar to the subject. In this usage pattern, the subject can wear the cuff according to the correct usage pattern.

  Further preferably, the fluid bag is not disposed between the housing and the wrist in a state where the cuff is wound around the wrist.

  According to the wrist sphygmomanometer configured in this way, regardless of whether the wrist circumference of the subject is large or small, the fluid bag is more reliably placed on the wrist on the palm side where the artery to be compressed exists. Can do.

  Preferably, the wrist sphygmomanometer further includes a display unit for displaying the measured blood pressure value. The housing includes a first housing portion in which a display unit is provided, and a second housing portion that is disposed at a position shifted in the circumferential direction of the cuff with respect to the first housing portion. The second housing part accommodates the expansion / contraction mechanism part, and one end in the circumferential direction of the cuff is fixed.

  According to the wrist type sphygmomanometer configured in this way, the subject can wear the cuff in the correct usage pattern according to the usage pattern of the cuff in which the first housing part provided with the display unit is arranged on the back side of the hand. it can. Moreover, the expansion / contraction mechanism part is provided in the 2nd housing | casing part arrange | positioned in the position which shifted | deviated to the circumferential direction of the cuff with respect to the 1st housing | casing part. Thereby, the volume of the fluid bag can be set small, and the expansion / contraction mechanism can be miniaturized. Along with this, the casing can be made thinner, so that the subject can wear the cuff for a long time without a sense of incongruity.

  Preferably, the first housing portion and the second housing portion are coupled to each other so as to be rotatable about an axis along the axial direction of the cuff.

  According to the wrist type sphygmomanometer configured in this way, the first housing part and the second housing part can be arranged on the circumference of the wrist along the shape of the wrist. Thereby, it can suppress that a clearance gap arises between a housing | casing and a wrist, and can tell the wrist the compression force accompanying expansion | swelling of a fluid bag more reliably.

  Further preferably, in the circumferential direction of the cuff, the second housing part has a total length smaller than that of the one housing part.

  According to the wrist type sphygmomanometer configured as described above, in the usage pattern of the cuff in which the first housing part provided with the display unit is arranged on the back side of the hand, the first housing part and the second housing part are connected to the wrist. It can be arranged on the circumference of the wrist along the shape.

  Preferably, the expansion / contraction mechanism part includes a first conduit connected to the fluid bag and through which the fluid flows. The first conduit is provided so as to open at the end of the casing in the circumferential direction of the cuff. Preferably, the wrist sphygmomanometer further includes a sensor unit that is housed in the housing and detects the pressure in the fluid bag. The sensor unit is connected to the fluid bag and has a second conduit through which the fluid flows. The second conduit is provided so as to open at the end of the casing in the circumferential direction of the cuff.

  According to the wrist type sphygmomanometer configured in this way, the subject can wear the cuff for a long time without a sense of incongruity by thinning the housing.

  Preferably, the housing has a bottom surface facing the wrist surface in a state where the cuff is wound around the wrist. The housing is formed with an insertion hole that penetrates the housing at a position spaced from the bottom surface and into which the other end in the circumferential direction of the cuff is inserted.

  According to the wrist type sphygmomanometer configured in this way, it is possible to prevent the cuff from being hindered due to interference between the housing and the other end in the circumferential direction of the cuff.

  Further preferably, the locking mechanism portion includes a stopper portion. The stopper portion is provided so as to permit movement of the cuff inserted in the insertion hole in the tightening direction, restrict movement in the loosening direction, and lock the other end in the circumferential direction of the cuff.

  According to the wrist sphygmomanometer configured as described above, the subject engages the other end in the circumferential direction of the cuff with respect to the housing by a series of operations of inserting the cuff into the insertion hole and pulling in the tightening direction. Can be stopped. For this reason, the operativity at the time of cuff wearing can be improved.

  Preferably, the stopper portion presses the fluid bag when the cuff is locked. By the pressing by the stopper portion, the inside of the fluid bag is partitioned into a space on one end side and a space on the other end side of the cuff.

  According to the wrist type sphygmomanometer configured in this way, it is only necessary to supply fluid to the space on the one end side of the cuff inside the fluid bag at the time of blood pressure measurement, so that the measurement time can be shortened.

  Preferably, the locking mechanism portion further includes a release portion. The release portion is connected to the stopper portion and is provided so as to release the locking of the cuff by the stopper portion.

  According to the wrist type sphygmomanometer configured in this way, it is possible to improve the operability when removing the cuff attached to the wrist.

  Further, preferably, when the casing is disposed on the circumference of the wrist on the back side of the hand, one end in the circumferential direction of the cuff is connected to the end of the casing on the thumb side of the subject.

  According to the wrist type sphygmomanometer configured in this way, when the wrist is supported so that the back side of the hand faces upward when the cuff is worn, the cuff is wound around the side farther from the side closer to the body, It is passed through the insertion hole and pulled toward the near side of the body. For this reason, the operativity at the time of cuff wearing can be improved.

  Preferably, the cuff further has a plate member disposed outside the fluid bag in a state of being wound around the wrist. A plurality of grooves extending along the cuff axial direction are formed in the plate member.

  According to the wrist type sphygmomanometer configured in this way, the shape of the plate member can be made to conform to the shape of the wrist regardless of whether the subject's wrist circumference is large or small.

  Preferably, the cuff is attached to the wrist so that the housing is disposed on the circumference of the wrist on the back side of the hand.

  According to the wrist type sphygmomanometer configured in this way, since the housing is arranged on the back side of the hand that is considered to be most familiar to the subject, the subject can wear the cuff according to the correct usage pattern.

  As described above, according to the present invention, it is possible to provide a wrist type sphygmomanometer in which a cuff is worn according to a correct usage pattern.

It is a perspective view which shows the usage type of the wrist type blood pressure meter in embodiment of this invention. It is sectional drawing which shows the usage condition of the wrist-type blood pressure meter seen from the direction shown by the arrow II in FIG. It is sectional drawing which shows the range enclosed by the dashed-two dotted line III in FIG. It is a functional block diagram which shows the structure of the wrist type | mold blood pressure meter in FIG. It is a flowchart which shows the flow of the blood-pressure measurement process of the sphygmomanometer in FIG. It is sectional drawing which shows the usage type of the wrist-type blood pressure meter for a comparison when a test subject's wrist circumference is small. It is sectional drawing which shows the usage type of the wrist-type blood pressure meter for a comparison when a test subject's wrist circumference is large. FIG. 8 is a cross-sectional view showing another usage pattern of the wrist sphygmomanometer for comparison in FIGS. 6 and 7 when the wrist circumference of the subject is large. It is sectional drawing which shows the usage type of the wrist type | mold blood pressure meter for the comparison in FIG. 8 when a test subject's wrist circumference is small. It is sectional drawing which shows the usage condition of the wrist-type blood pressure meter in FIG. 1 in case a test subject's wrist circumference is small. It is sectional drawing which shows the usage type of the wrist-type blood pressure meter in FIG. 1 when a test subject's wrist circumference is large. It is a side view which shows the main body case arrange | positioned on the periphery of a wrist. It is a perspective view which shows the main body case in FIG. It is sectional drawing which shows the main body case along the XIV-XIV line | wire in FIG. It is sectional drawing which shows the main body case for a comparison. It is sectional drawing which shows a display part side case. It is sectional drawing which shows the display part side case in FIG. 16 at the time of cuff insertion. It is sectional drawing which shows the display part side case in FIG. 16 after cuff insertion. It is sectional drawing which expands and shows the range enclosed by the dashed-two dotted line XIX in FIG. It is an external view which shows a display part case. It is sectional drawing which shows the display part case in FIG. 20 at the time of cuff removal. It is a side view which shows the motion of the cuff wound around a test subject's wrist at the time of cuff wearing. It is another side view which shows the movement of the cuff wound around a test subject's wrist at the time of cuff mounting | wearing. It is another side view which shows the motion of the cuff wound around a test subject's wrist at the time of cuff wearing. It is a perspective view which shows the curler included in the cuff. It is a side view which shows the curler in FIG. 25 with which a wrist is mounted | worn. It is sectional drawing which represents typically the deformation | transformation of a curler when a wrist circumference is small and when it is large.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

(Embodiment 1)
FIG. 1 is a perspective view showing a usage pattern of a wrist blood pressure monitor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing how the wrist sphygmomanometer is used as seen from the direction indicated by arrow II in FIG. In the present embodiment, the basic structure of the wrist sphygmomanometer 100 shown in FIG. 1 will be described.

  Referring to FIGS. 1 and 2, wrist sphygmomanometer 100 has apparatus main body 110 and cuff 31 as its main components. At the time of blood pressure measurement, the wrist sphygmomanometer 100 is worn in a state where the cuff 31 is wound around the wrist of the subject. The cuff 31 is generally attached to the wrist of the left hand.

  The apparatus main body 110 includes a main body case 20 and a display unit 26. The main body case 20 has a casing shape and makes the appearance of the apparatus main body 110. The display unit 26 is provided on the surface of the main body case 20. The display unit 26 displays the blood pressure measurement result, the pulse rate measurement result, and the like using numerical values, graphs, and the like. As the display unit 26, for example, a liquid crystal panel is used.

  The main body case 20 is provided integrally with the cuff 31. In wrist sphygmomanometer 100 according to the present embodiment, cuff 31 is attached to the subject's wrist so that main body case 20 is arranged on the back of the wrist on the back side of the hand.

  3 is a cross-sectional view showing a range surrounded by a two-dot chain line III in FIG. 1 to 3, the cuff 31 has a belt-like outer shape whose longitudinal direction is a winding direction around the wrist. The cuff 31 takes a cylindrical shape while being wound around the wrist of the subject. That is, the circumferential direction of the cuff 31 having a cylindrical shape is the same direction as the circumferential direction around the wrist of the subject.

  The cuff 31 includes an air bag 41 to which air is supplied, and a bag-like cover body 36 for winding the air bag 41 around the wrist and fixing it. The air bag 41 is accommodated in the bag-shaped cover body 36. The air bag 41 consists of a bag-shaped member formed using the resin sheet. An inflation / deflation space 45 is formed inside the air bag 41. The pressure in the expansion / contraction space 45 is a cuff pressure. The expansion / contraction space 45 is connected to an air system component 141 for blood pressure measurement of the apparatus main body 110 to be described later via a pipe (see FIG. 4).

  The cuff 31 further includes a curler 46 as a plate member that urges the air bag 41 inward. The curler 46 has a substantially rectangular outer shape in a developed state. The curler 46 is disposed inside the bag-like cover body 36 so as to overlap the outside of the air bag 41 with respect to the wrist of the subject. Curler 46 is formed of a resin material such as polypropylene (PP), for example.

  The ulnar artery 212 and the radial artery 214 are present on the wrist cross section close to the palm side. In a state where the cuff 31 is wound around the wrist of the subject, the air bag 41 is arranged so as to cover the wrist surface on the palm side. When blood pressure is measured, the air bladder 41 is inflated by supplying air, and the ulnar artery 212 and the radial artery 214 are compressed by the inflated air bladder 41.

  Next, the configuration of main functional blocks of the wrist blood pressure monitor 100 will be described. FIG. 4 is a functional block diagram showing the configuration of the wrist sphygmomanometer in FIG.

  Referring to FIG. 4, apparatus main body 110 is provided with an air system component 141 for blood pressure measurement for supplying or discharging air to / from air bag 41 contained in cuff 31 through a pipe. The air system component 141 for blood pressure measurement is a pressure sensor 142 as a sensor unit that is a pressure detection means for detecting the pressure in the air bag 41, and a pump as an expansion / contraction mechanism unit 140 for expanding and contracting the air bag 41. 143 and a valve 145. The apparatus main body 110 is provided with an oscillation circuit 147, a pump drive circuit 148, and a valve drive circuit 149 in association with the blood pressure measurement air component 141.

  The apparatus main body 110 has a CPU (Central Processing Unit) 150 for centrally controlling and monitoring each unit, and a memory for storing various information such as a program for causing the CPU 150 to perform a predetermined operation and a measured blood pressure value. Unit 170, display unit 26 for displaying various information including blood pressure measurement results, input unit 190 operated to input various instructions for measurement, power supply to CPU 150 and each functional block A power supply unit 180 is provided. The CPU 150 also functions as blood pressure value calculation means for calculating the blood pressure value.

  The pressure sensor 142 detects the cuff pressure of the air bladder 41 and outputs a signal corresponding to the detected pressure to the oscillation circuit 147. The pump 143 supplies air to the air bag 41 through piping. The valve 145 opens and closes when maintaining the pressure in the air bladder 41 or exhausting the air in the air bladder 41. The oscillation circuit 147 outputs an oscillation frequency signal corresponding to the output value of the pressure sensor 142 to the CPU 150. The pump drive circuit 148 controls the drive of the pump 143 based on a control signal given from the CPU 150. The valve drive circuit 149 performs opening / closing control of the valve 145 based on a control signal given from the CPU 150.

  Next, the flow of blood pressure measurement processing in the wrist sphygmomanometer 100 will be described. FIG. 5 is a flowchart showing the flow of blood pressure measurement processing of the sphygmomanometer in FIG.

  A program according to the flowchart in FIG. 5 is stored in advance in the memory unit 170 illustrated in FIG. 4, and the blood pressure measurement process is performed by the CPU 150 reading and executing the program from the memory unit 170.

  Referring to FIGS. 4 and 5, wrist sphygmomanometer 100 is initialized when the subject turns on the power by operating the power button of input unit 190 (step S <b> 101). Next, when measurement is possible, the CPU 150 starts driving the pump 143 and gradually increases the cuff pressure of the air bladder 41 (step S102).

  In the process of gradually increasing the cuff pressure, the CPU 150 extracts pulse wave information based on the oscillation frequency obtained from the oscillation circuit 147. Then, a systolic blood pressure value (maximum blood pressure value) and a diastolic blood pressure value (minimum blood pressure value) are calculated from the extracted pulse wave information (step S103). Thereby, the measurement of the blood pressure value is completed.

  When the blood pressure value is calculated in step S103, the CPU 150 displays the calculated blood pressure value on the display unit 26 (step S104). When the cuff pressure reaches a predetermined level necessary for blood pressure measurement, the CPU 150 stops the pump 143. Next, the closed valve 145 is opened, and the air in the air bladder 41 is exhausted (step S105). Thereafter, the CPU 150 waits for the subject's power-off command and ends the operation.

  The measurement method described above is based on a so-called pressurization measurement method that detects a pulse wave when the air bag 41 is pressurized. However, a so-called decompression measurement method that detects a pulse wave when the air bag 41 is depressurized. Of course, it is also possible to adopt.

Next, the basic structure of the wrist blood pressure monitor 100 will be described in more detail.
1 to 4, the main body case 20 is configured by combining a display unit side case 21 and a pump side case 22. The display unit side case 21 and the pump side case 22 are arranged side by side in the circumferential direction around the wrist. In the present embodiment, the display unit side case 21 is disposed at the center position of the back of the hand in the circumferential direction around the wrist while the cuff 31 is attached to the wrist of the subject.

  A display unit 26 is provided in the display unit side case 21. The display unit side case 21 further accommodates a CPU 150, a memory unit 170, an input unit 190, a power supply unit 180, and various circuits 147 to 149. The pump-side case 22 houses a blood pressure measurement air system component 141, that is, a pump 143, a valve 145, and a pressure sensor 142. The pressure sensor 142 may be housed in the display unit side case 21.

  The display unit side case 21 has a substantially rectangular parallelepiped shape having a main surface 21a, a bottom surface 21d, and side surfaces 21b and 21c.

  In a state where the cuff 31 is mounted on the wrist of the subject, the main surface 21a is disposed on the outer peripheral side on the circumference of the wrist. A display unit 26 is provided on the main surface 21a. The bottom surface 21d is disposed on the inner peripheral side on the circumference of the wrist and faces the side opposite to the main surface 21a. The bottom surface 21d is disposed to face the wrist surface on the back side of the hand. The side surface 21 b and the side surface 21 c extend in a direction connecting the main surface 21 a and the bottom surface 21 d and face the circumferential direction of the cuff 31. The side surface 21 b and the side surface 21 c face opposite sides in the circumferential direction of the cuff 31.

  An insertion hole 28 is formed in the main body case 20. The insertion hole 28 is formed in the display unit side case 21. The insertion hole 28 is formed at a position spaced from the bottom surface 21d. The insertion hole 28 is formed between the main surface 21a and the bottom surface 21d. The insertion hole 28 is formed so as to penetrate the display unit side case 21 between the side surface 21c and the side surface 21b. With the cuff 31 attached to the subject's wrist, the insertion hole 28 extends along a circumferential tangential direction around the wrist. The opening cross-sectional area of the insertion hole 28 is larger than the cross-sectional area of the cuff 31 when the cuff 31 is cut by a plane orthogonal to the longitudinal direction.

  The pump side case 22 has a substantially rectangular parallelepiped shape having a main surface 22a, a bottom surface 22d, and side surfaces 22b and 22c. The main surface 22a is arrange | positioned at the outer peripheral side on the periphery of a wrist. The bottom surface 22d is disposed on the inner peripheral side of the wrist and faces the opposite side to the main surface 22a. The bottom surface 22d is disposed to face the wrist surface on the back side of the hand. The side surface 22b and the side surface 22c extend in a direction connecting the main surface 22a and the bottom surface 22d and face the circumferential direction of the cuff 31. The side surface 22b and the side surface 22c face each other in the circumferential direction of the cuff 31.

  The display unit side case 21 and the pump side case 22 are arranged such that the side surface 21b and the side surface 22c face each other. The display unit side case 21 and the pump side case 22 have a connecting portion 91 and a connecting portion 92, respectively. The connecting portion 91 and the connecting portion 92 are provided on the side surface 21b and the side surface 22c, respectively. The display unit side case 21 and the pump side case 22 are connected to each other via connecting portions 91 and 92.

  The cuff 31 has one end 32 and the other end 33 at both ends in the longitudinal direction. One end 32 of the cuff 31 is fixed to the main body case 20. One end 32 of the cuff 31 is fixed to the pump side case 22. One end 32 of the cuff 31 is fixed to the side surface 22 b of the pump side case 22.

  The main body case 20 has a locking mechanism 71. The cuff 31 is wound around the wrist starting from one end 32 fixed to the main body case 20, and the other end 33 is inserted into the insertion hole 28. The locking mechanism 71 is provided so that the other end 33 of the cuff 31 inserted into the insertion hole 28 can be locked. When the other end 33 of the cuff 31 is locked to the display unit side case 21 of the main body case 20 by the locking mechanism 71, the cuff 31 is held in a state of being wound around the wrist of the subject.

  In such a configuration, the air bag 41 is not disposed between the main body case 20 and the wrist while the cuff 31 is wound around the wrist.

  The connection structure of the display unit side case 21 and the pump side case 22 and the structure of the locking mechanism 71 will be described in detail in the second embodiment.

  Then, the effect | action and effect which are show | played by the basic structure of the wrist-type blood pressure monitor 100 in FIG. 1 are demonstrated.

  FIG. 6 is a cross-sectional view showing a usage form of a wrist blood pressure monitor for comparison when the wrist circumference of the subject is small. FIG. 7 is a cross-sectional view showing a usage form of a wrist blood pressure monitor for comparison when the wrist circumference of the subject is large.

  With reference to FIGS. 6 and 7, a wrist type sphygmomanometer 500 having a main body case 20 and a cuff 31 is schematically shown. In the wrist type sphygmomanometer 500 for comparison, the cuff 31 is attached to the wrist by a usage pattern in which the main body case 20 is disposed on the wrist side portion on the thumb side. A hook-and-loop fastener 44 is provided at one end 32 of the cuff 31. The cuff 31 is wound around the wrist of the subject, and the bag-like cover body 36 on the other end 33 side is joined to the surface fastener 44.

  As shown in FIG. 6, when the wrist circumference of the subject is small, the air bag 41 passes through the palm side from the end portion 42 located on the back side of the hand inside the bag-like cover body 36 and is adjacent to the end portion 42. It extends to the end portion 43 located at the position. Further, as shown in FIG. 7, when the wrist circumference of the subject is large, the air bag 41 passes through the wrist side on the thumb side from the end portion 42 located on the back side of the hand inside the bag-like cover body 36, It extends to the end 43 located on the wrist side on the little finger side. In any case, the air bag 41 is provided so as to cover the wrist surface on the palm side.

  FIG. 8 is a cross-sectional view showing another usage pattern of the wrist sphygmomanometer for comparison in FIGS. 6 and 7 when the wrist circumference of the subject is large. Referring to FIG. 8, in wrist sphygmomanometer 500 for comparison in FIGS. 6 and 7, a case where a cuff is mounted so that main body case 20 is disposed on the wrist surface on the back side of the hand is shown. . In this case, when the wrist circumference of the subject is large, the air bag 41 passes from the end portion 42 located on the wrist side portion on the little finger side over the wrist surface on the back side of the hand, and the end portion 42 located on the wrist surface on the palm side. Extend to. Thus, since the starting point of the air bag 41 moves away from the palm side, the air bag 41 cannot be disposed so as to entirely cover the wrist surface on the palm side. In order to cover the entire wrist surface on the palm side with the air bag 41, it is necessary to set an air bag 41 'extending between the end portion 42 and the end portion 43' located on the wrist side portion on the little finger side. Occurs.

  FIG. 9 is a cross-sectional view showing a usage form of the wrist sphygmomanometer for comparison in FIG. 8 when the wrist circumference of the subject is small. Referring to FIG. 9, the figure shows a case where air bag 41 ′ set in wrist sphygmomanometer 500 in FIG. 8 is applied to a subject with a small wrist circumference. The air bag 41 ′ is provided so as to go around the wrist from the end portion 42 located on the wrist side on the little finger side, and further overlap the outer periphery of the air bag 41 ′ wound around the wrist.

  In this case, there is a problem that the cuff 31 is loosened when the air bladder 41 ′ is inflated due to the overlapping of the air bladder 41 ′ at the position where the surface fastener 44 is provided. There is also a concern that the cuff 31 prevents the subject from visually recognizing the display unit 26 when the air bag 41 ′ is inflated.

  In other words, using the wrist type sphygmomanometer 500 for comparison, even if the main body case 20 is intended to be used on the wrist surface on the back side of the hand, it can be used for both large and small wrist circumferences. The structure of the cuff 31 cannot be set.

  FIG. 10 is a cross-sectional view showing how the wrist blood pressure monitor in FIG. 1 is used when the wrist circumference of the subject is small. FIG. 11 is a cross-sectional view showing a usage pattern of the wrist blood pressure monitor in FIG. 1 when the wrist circumference of the subject is large.

  Referring to FIGS. 10 and 11, on the other hand, in wrist sphygmomanometer 100 in the present embodiment, one end 32 of cuff 31 is fixed to main body case 20 and when cuff 31 is attached to the wrist, The other end 33 of the cuff 31 is locked by a locking mechanism portion 71 (see FIG. 2) provided in the main body case 20. The air bag 41 is not disposed between the main body case 20 and the wrist in a state where the cuff 31 is wound around the wrist.

  With such a configuration, it is possible to realize the wrist type sphygmomanometer 100 that can cover the entire wrist surface on the palm side with the air bag 41 regardless of whether the wrist circumference of the subject is small or large. In addition, even when the entire length of the air bag 41 is set to a length that can cover the entire wrist surface on the palm side when the wrist circumference of the subject is large, when the wrist circumference of the subject is small, A wrist blood pressure monitor 100 that does not hinder wrist tightening by the cuff 31 can be realized.

  In the wrist type sphygmomanometer 100 shown in FIG. 1, the base point (the center position of the wrist surface on the back side of the hand) than the quarter circumference position (position A in FIG. 10) of the minimum wrist circumference assumed as a measurement target. : End 42 is arranged on the side of position C) in FIG. 10, and the base point (position C in FIG. 11) rather than the 3/4 position (position B in FIG. 11) of the maximum wrist circumference assumed as a measurement target. The overall length and arrangement of the air bag 41 are set so that the end 43 is arranged on the side of the).

  Further, in the wrist sphygmomanometer 100 in FIG. 1, the other end 33 of the cuff 31 is inserted into the insertion hole 28 formed in the main body case 20. According to such a configuration, no interference occurs between the cuff 31 and the main body case 20 as the air bag 41 expands. In addition, the visual recognition of the display unit 26 is not blocked by the cuff 31.

  The basic structure of the wrist sphygmomanometer 100 according to the first embodiment of the present invention described above will be described together. The wrist sphygmomanometer 100 according to the present embodiment is wound around the wrist of the subject. A cuff 31 having a shape, an expansion / contraction mechanism portion 140, and a main body case 20 as a casing disposed on the wrist circumference in a state where the cuff 31 is wound around the wrist. The cuff 31 has an air bag 41 as an inflatable and contractible fluid bag to which air as a fluid is supplied. The expansion / contraction mechanism 140 expands / contracts the air bladder 41. The body case 20 houses the expansion / contraction mechanism 140. One end 32 in the circumferential direction of the cuff 31 is fixed to the main body case 20. The main body case 20 has a locking mechanism portion 71 that locks the other end 33 in the circumferential direction of the cuff 31 and holds the cuff 31 in a state of being wound around the wrist.

  According to the wrist type sphygmomanometer 100 according to the first embodiment of the present invention configured as described above, the wrist case circumference takes the form of use of the cuff 31 in which the main body case 20 is arranged on the circumference of the wrist on the back side of the hand. It is possible to realize a wrist type sphygmomanometer that can handle a large person and a small person. Even if it is a person who uses wrist type sphygmomanometer 100 for the first time by use form of cuff 31 by which main part case 20 is arranged on the circumference of the wrist on the back side of hand, cuff 31 can be naturally attached to the right position. .

(Embodiment 2)
In the present embodiment, the detailed structure of the wrist sphygmomanometer 100 shown in FIG. 1 will be described. FIG. 12 is a side view showing the main body case arranged on the circumference of the wrist. FIG. 13 is a perspective view showing the main body case in FIG.

  Referring to FIGS. 12 and 13, display unit side case 21 and pump side case 22 have a connecting portion 91 and a connecting portion 92, respectively. The connecting portion 91 and the connecting portion 92 support a shaft portion extending along the axial direction of the cuff 31 having a cylindrical shape (the axial direction of the central shaft 61), and rotatably support the shaft portion around the shaft. It is comprised by the combination with a receiving part. The display unit side case 21 and the pump side case 22 are connected to each other so as to be rotatable about a central axis 61 via connecting portions 91 and 92.

  According to such a configuration, when the subject places the main body case 20 on the wrist surface on the back side of the hand and wears the cuff 31, the display unit side case 21 and the pump side case 22 match the shape of the subject's wrist. Rotate. Thereby, it becomes possible to arrange | position the display part side case 21 and the pump side case 22 along the shape of a wrist on the periphery of a wrist.

  Further, in the circumferential direction of the cuff 31, the pump side case 22 has a total length smaller than that of the display unit side case 21 (L2 <L1). Generally, the shape of the wrist has a large length in the width direction when viewed from the back side of the hand and a small length in the thickness direction. For this reason, in the wrist type sphygmomanometer 100 in which the display unit side case 21 is arranged on the wrist surface on the back side of the hand, the display unit side case 21 and the pump side case 22 are more similar to the wrist shape due to the relationship of L2 <L1. Can be arranged.

  Thereby, it can suppress that a clearance gap arises between the main body case 20 and a wrist, and can convey the compression force accompanying the expansion | swelling of the air bag 41 to a wrist more reliably. As a result, blood pressure measurement accuracy by the wrist sphygmomanometer 100 can be improved.

  FIG. 14 is a cross-sectional view showing the main body case along the line XIV-XIV in FIG. 13. With reference to FIGS. 13 and 14, the pump 143 and the pressure sensor 142 are accommodated in the pump-side case 22.

  The pump 143 and the pressure sensor 142 have an air pipe 66 as a first pipe and an air pipe 67 as a second pipe, respectively. The pump 143 is connected to the air bladder 41 through the air tube 66, and the pressure sensor 142 is connected to the air bladder 41 through the air tube 67. In wrist sphygmomanometer 100 in the present embodiment, air tube 66 and air tube 67 are provided so as to open to side surface 22 b of pump side case 22. The side surface 22b is a side surface disposed at the end of the main body case 20 in the circumferential direction of the cuff 31 taking a cylindrical shape.

  FIG. 15 is a cross-sectional view showing a main body case for comparison. With reference to FIG. 15, in the main body case 20 for comparison shown in the figure, an air tube 66 is provided so as to open to the bottom surface 22 d of the pump side case 22. The cuff 31 is inserted between the wrist surface and the pump-side case 22 while being attached to the wrist. In such a configuration, there arises a problem that the protruding height of the pump side case 22 from the wrist surface is increased.

  Referring to FIGS. 13 and 14, on the other hand, in wrist sphygmomanometer 100 according to the present embodiment, air tube 66 and air tube 67 are provided to open to side surface 22 b of pump-side case 22. Therefore, it is not necessary to insert the cuff 31 between the wrist surface and the pump side case 22. For this reason, the pump-side case 22 can be thinned. In this case, for example, in order to continuously measure the blood pressure value, even if the wrist sphygmomanometer 100 is used in such a manner that the cuff 31 is worn for 24 hours, the subject can feel the cuff without feeling uncomfortable. 31 can continue to be worn.

  In wrist sphygmomanometer 100 according to the present embodiment, body case 20 has a divided structure including display unit side case 21 and pump side case 22 and an expansion / contraction mechanism for supplying air to air bag 41. The portion 140 is accommodated in the pump side case 22. According to such a configuration, the expansion / contraction mechanism 140 accommodated in the pump-side case 22 is disposed at a position closer to the palm side, even though the main body case 20 is disposed on the wrist surface on the back side of the hand. Can do. Thereby, the volume of the air bladder 41 can be set small, and accordingly, the pump 143 can be downsized.

  FIG. 16 is a cross-sectional view showing the display unit side case. Referring to FIG. 16, in the display unit side case 21, an accommodation space 76 is formed between the bottom surface 21 d and the insertion hole 28. The accommodation space 76 is formed with a receiving portion 79 for supporting a stopper portion 72 described later. An opening 78 is formed in the display unit side case 21 so as to allow communication between the accommodation space 76 and the insertion hole 28.

  The locking mechanism 71 is accommodated in the accommodation space 76. The locking mechanism 71 is disposed on the side close to the side surface 21c, which is the side where the other end 33 of the cuff 31 is inserted, of the side surface 21b and the side surface 21c.

  The locking mechanism part 71 has a stopper part 72 and a spring part 73 as its components. The stopper part 72 has a pressing part 72m and a base part 72n as its constituent parts. The base portion 72n has a cylindrical shape. The base portion 72n is disposed in the accommodation space 76. The holding portion 72m is formed so as to enter the insertion hole 28 through the opening 78 from the base portion 72n. The base portion 72n is supported by the receiving portion 79 in the accommodation space 76. The base portion 72n is rotatably supported by the receiving portion 79 so that the posture of the pressing portion 72m changes.

  The spring part 73 is provided in contact with the base part 72n. The spring portion 73 is disposed on the opposite side of the insertion hole 28 with respect to the base portion 72n. The spring portion 73 is provided so as to apply an elastic force in a direction close to the insertion hole 28 to the stopper portion 72. By applying an elastic force from the spring portion 73 to the stopper portion 72, the holding portion 72 m is provided in a form that protrudes from the opening 78 into the insertion hole 28.

  FIG. 17 is a cross-sectional view showing the display unit side case in FIG. 16 when the cuff is inserted. 18 is a cross-sectional view showing the display unit side case in FIG. 16 after the cuff is inserted.

  Referring to FIG. 17, when the subject wears cuff 31 on the wrist, the other end 33 of cuff 31 is inserted into insertion hole 28. At this time, the pressing portion 72m changes its posture by being pressed in the tightening direction by the cuff 31. Along with this, the opening cross-sectional area of the insertion hole 28 reduced by the pressing portion 72m is expanded, and the cuff 31 is slidable in the tightening direction. Referring to FIG. 18, when the cuff 31 is wound around the wrist of the subject and the sliding movement is stopped, the holding portion 72 m is caused to reduce the opening cross-sectional area of the insertion hole 28 by the elastic force of the spring portion 73. Return to the posture. Thereby, the cuff 31 is locked inside the insertion hole 28 by being pressed by the pressing portion 72m, and the cuff 31 is held in a state of being wound around the wrist of the subject.

  With the structure described above, the locking mechanism 71 allows the cuff 31 inserted in the insertion hole 28 to move in the tightening direction and restricts the movement in the loosening direction, and can lock the other end 33 of the cuff 31. It is provided as such. Accordingly, the subject can attach the cuff 31 to the wrist by a series of operations of inserting the cuff 31 into the insertion hole 28 and sliding the cuff 31 in the tightening direction.

  The structure of the locking mechanism 71 is not limited to the structure shown in the drawing, and may be a structure using a general one-way clutch, for example.

  FIG. 19 is an enlarged cross-sectional view showing a range surrounded by a two-dot chain line XIX in FIG. Referring to FIGS. 18 and 19, holding portion 72 m is formed to have a length equal to or longer than air bag 41 in the width direction of insertion hole 28 (the depth direction of the paper surface shown in FIG. 18). When the cuff 31 is pressed by the pressing portion 72m, the expansion / contraction space 45 in the air bag 41 is divided into a space 45p on the one end 32 side of the cuff 31 and a space on the other end 33 side of the cuff 31. It is divided into 45q.

  According to such a configuration, when blood pressure is measured, since the inflow of air to the space 45q side is restricted, it is only necessary to supply air to the space 45p. Thereby, the time required for blood pressure measurement can be shortened. In particular, in the present embodiment, the locking mechanism portion 71 is disposed on the side closer to the side surface 21c of the side surface 21b and the side surface 21c. In the state in which the cuff 31 is inserted into the insertion hole 28, the side surface 21c is located on the one end 32 side of the cuff 31, so that the above effect can be more effectively achieved.

  FIG. 20 is an external view showing a display unit case. FIG. 21 is a cross-sectional view showing the display unit case in FIG. 20 when the cuff is removed.

  Referring to FIGS. 20 and 21, in wrist type sphygmomanometer 100 in the present embodiment, locking mechanism portion 71 further has a release portion 81. The release unit 81 includes an operation unit 81x and a moving unit 81y as its constituent parts. The operation unit 81x is provided to be exposed to the outside of the display unit side case 21 so that the operation by the subject can be performed. The operation unit 81x is also provided on the side surface on the opposite side of the display unit side case 21 shown in FIG. The moving part 81 y is disposed in the accommodation space 76. The moving part 81 y is connected to the stopper part 72. More specifically, the moving part 81y is provided so as to contact the base part 72n between the insertion hole 28 and the base part 72n.

  The moving part 81y moves in a direction away from the insertion hole 28 by the operation of the operating part 81x by the subject. As a result, the stopper portion 72 is pushed into the accommodating space 76 against the elastic force of the spring portion 73. As a result, the pressing of the cuff 31 by the pressing portion 72m is released, and the cuff 31 can be pulled out from the insertion hole 28. According to such a configuration, the subject can immediately release the wrist restraint by the cuff 31 even in an emergency at the time of blood pressure measurement.

  22 to 24 are side views showing the movement of the cuff wound around the wrist of the subject when the cuff is worn.

  Referring to FIGS. 22 to 24, in wrist sphygmomanometer 100 according to the present embodiment, when main body case 20 is arranged on the wrist circumference on the back side of hand, one end 32 of cuff 31 is the thumb of the subject. It is connected to the end of the main body case 20 on the side, that is, the side surface 22 b of the pump side case 22.

  In this case, when wearing the cuff 31, as shown in FIG. 22, the subject first wraps around the wrist while keeping the cuff 31 away from the near side close to the subject's body. Then, as shown in FIGS. 23 and 24, the other end 33 of the cuff 31 is inserted into the insertion hole 28, and the cuff 31 is pulled toward the near side close to the body of the subject. According to such an operation process, since the subject can easily handle the cuff 31, the operability when the cuff 31 is attached can be improved.

  In addition, it is good also as a structure which provides a stopper in the other end 33 of the cuff 31, and the other end 33 of the cuff 31 is always inserted in the insertion hole 28. FIG. In this case, the subject only has to place the cylindrical cuff 31 around the wrist and then draw the other end 33 of the cuff 31 toward the front side of the body.

  FIG. 25 is a perspective view showing a curler included in the cuff. FIG. 26 is a side view showing the curler in FIG. 25 attached to the wrist.

  Referring to FIGS. 25 and 26, curler 46 has a surface 46b facing the wrist surface and a surface 46a disposed on the back side of surface 46b in a state where cuff 31 is attached to the wrist. In wrist sphygmomanometer 100 in the present embodiment, a plurality of grooves 47 are formed in curler 46.

  The plurality of grooves 47 extend along the axial direction of the cuff 31 having a cylindrical shape. The plurality of grooves 47 are formed so as to be recessed from the surface 46a. Grooves 47 and convex portions 48 are repeatedly formed in the longitudinal direction of the cuff 31 on the surface 46a.

  FIG. 27 is a cross-sectional view schematically showing the deformation of the curler when the wrist circumference is small and large. Referring to FIG. 27, when main body case 20 is arranged on the wrist surface on the back side of the subject's hand, the curl 46 bends greatly differently when the wrist circumference is small and when the wrist circumference is large. In this case, if the curler 46 is not sufficiently flexible, the curler 46 cannot be curved in both cases where the wrist circumference is small and large.

  Referring to FIGS. 25 and 26, on the other hand, in wrist sphygmomanometer 100 according to the present embodiment, by forming a plurality of grooves 47 in curler 46, curler 46 can be easily bent in accordance with the shape of the wrist. Can be made. Thereby, the cuff 31 can be fitted to the wrist without generating a gap between the cuff 31 and the wrist surface. In addition, when the cuff 31 is not used, the cuff 31 can be folded thinly, so that the storage property of the cuff 31 can be improved.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is mainly applied to a wrist sphygmomanometer used at home for the purpose of self-management of blood pressure.

  20 Main body case, 21 Display portion side case, 21a, 22a Main surface, 21b, 21c, 22b, 22c Side surface, 21d, 22d Bottom surface, 22 Pump side case, 26 Display portion, 28 Insertion hole, 31 Cuff, 32 One end, 33 The other end, 36 bag-shaped cover body, 41 air bag, 42, 43 end, 44-face fastener, 45 expansion / contraction space, 45p, 45q space, 46 curler, 46a, 46b surface, 47 groove, 48 convex portion, 61 center Shaft, 66, 67 Air tube, 71 Locking mechanism part, 72 Stopper part, 72m Holding part, 72n Base part, 73 Spring part, 76 Storage space, 78 Opening part, 79 Receiving part, 81 Release part, 81x Operation part, 81y moving part, 91,92 connecting part, 100,500 wrist sphygmomanometer, 110 apparatus main body, 134 pump, 140 inflating / contracting mechanism part, 14 Air system component for blood pressure measurement, 142 pressure sensor, 143 pump, 14 valve, 147 oscillation circuit, 148 pump drive circuit, 149 valve drive circuit, 170 memory unit, 180 power supply unit, 190 input unit, 212 ulnar artery, 214 radial artery .

Claims (14)

A cuff having an inflatable and inflatable fluid bag to which a fluid is supplied and taking a tubular shape by being wound around the wrist of the subject;
An expansion / contraction mechanism for expanding and contracting the fluid bag;
A housing that accommodates the expansion / contraction mechanism, is disposed on a wrist circumference in a state where the cuff is wound around the wrist, and has one end fixed in the circumferential direction of the cuff;
The wrist sphygmomanometer, wherein the housing includes a locking mechanism portion that locks the other end in the circumferential direction of the cuff and holds the cuff wound around the wrist.   The wrist sphygmomanometer according to claim 1, wherein the fluid bag is not disposed between the housing and the wrist in a state where the cuff is wound around the wrist. A display unit for displaying the measured blood pressure value;
The casing is disposed at a position shifted in a circumferential direction of the cuff with respect to the first casing section provided with the display section and the first casing section, and accommodates the expansion / contraction mechanism section, The wrist type sphygmomanometer according to claim 1, further comprising a second housing portion to which one end in the circumferential direction of the cuff is fixed.   The wrist sphygmomanometer according to claim 3, wherein the first housing part and the second housing part are coupled to each other so as to be rotatable about an axis along the axial direction of the cuff.   5. The wrist type sphygmomanometer according to claim 3, wherein in the circumferential direction of the cuff, the second casing part has a total length smaller than that of the one casing part. The expansion / contraction mechanism includes a first conduit connected to the fluid bag and through which a fluid flows,
The wrist sphygmomanometer according to any one of claims 1 to 5, wherein the first duct is provided so as to open at an end of the housing in a circumferential direction of the cuff. A sensor unit that is housed in the housing and detects a pressure in the fluid bag;
The sensor unit is connected to the fluid bag and has a second conduit through which fluid flows,
The wrist sphygmomanometer according to any one of claims 1 to 6, wherein the second conduit is provided so as to open at an end of the casing in a circumferential direction of the cuff. The housing has a bottom surface facing the wrist surface in a state where the cuff is wound around the wrist;
The said housing | casing is formed with the insertion hole which penetrates the said housing | casing in the position spaced apart from the said bottom face, and the other end in the circumferential direction of the said cuff is inserted. Wrist blood pressure monitor according to item.   The locking mechanism portion includes a stopper portion that allows movement in the tightening direction of the cuff inserted into the insertion hole and restricts movement in the loosening direction, and locks the other end in the circumferential direction of the cuff. The wrist type sphygmomanometer according to claim 8. The stopper portion presses the fluid bag when the cuff is locked,
The wrist sphygmomanometer according to claim 9, wherein the inside of the fluid bag is partitioned into a space on one end side and a space on the other end side of the cuff by pressing by the stopper portion.   The wrist sphygmomanometer according to claim 9 or 10, wherein the locking mechanism portion further includes a release portion that is coupled to the stopper portion and releases the locking of the cuff by the stopper portion.   The one end in the circumferential direction of the cuff is connected to the end of the casing on the thumb side of the subject when the casing is arranged on the circumference of the wrist on the back side of the hand. The wrist sphygmomanometer according to item 1. The cuff further includes a plate member disposed outside the fluid bag in a state of being wound around a wrist,
The wrist sphygmomanometer according to any one of claims 1 to 12, wherein the plate member is formed with a plurality of grooves extending along an axial direction of the cuff.   The wrist sphygmomanometer according to any one of claims 1 to 13, wherein the cuff is attached to a wrist so that the casing is disposed on a wrist circumference on the back side of the hand.

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