JP3751113B2 - Arm band winding device for blood pressure measurement - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a wristband wrapping device for blood pressure measurement for winding a flexible armband around a part of a living body by reducing the diameter of the flexible armband that is bent into a cylindrical shape during blood pressure measurement. Is.
[0002]
[Prior art]
2. Description of the Related Art A blood pressure measurement armband wrapping device for winding a flexible armband that is wound into a cylindrical shape around a part of a living body by reducing the diameter thereof is known. For example, this is the apparatus described in Japanese Patent Application Laid-Open No. 6-237906. According to such a wristband winding device for blood pressure measurement, the winding state is uniform without requiring training or skill to obtain a technique for winding the armband around the arm of the living body. There is an advantage that variations in blood pressure measurement values due to this can be prevented.
[0003]
[Problems to be Solved by the Invention]
By the way, in the conventional armband winding device for blood pressure measurement, in order to fasten the armband wound in a cylindrical shape to the upper arm of a living body, it is linearly guided by a pneumatic cylinder, a rack and pinion, or an electric motor and Since the tip of the arm band is fixed to the member to be moved, and a mechanism is used to reduce the diameter of the arm band that is bent into a cylindrical shape by being pulled by the member, the arm band winding device becomes large. Therefore, it has been difficult to reduce the size of the automatic blood pressure measuring device including the armband winding device. On the other hand, it is conceivable to reduce the diameter of the armband by simply wrapping the tip of the armband around a rotating drum and rotating the rotating drum in the same rotational direction as the turning direction. There is a disadvantage that the formed cylindrical shape is not an accurate cylinder but an unstable shape.
[0004]
The present invention has been made against the background of the above circumstances, and the object of the present invention is to provide an armband for blood pressure measurement in which the cylindrical shape of the bent armband is stably formed and the outer shape is small. It is to provide a winding device.
[0005]
[Means for Solving the Problems]
The gist of the present invention for achieving such an object is to reduce the diameter of a flexible armband that is bent into a cylindrical shape when measuring blood pressure, so that the flexible armband becomes a part of a living body. An armband winding device for blood pressure measurement for wrapping, wherein (a) an armband base that supports a distal end portion of the flexible armband in a position fixed in a substantially tangential direction of a cylindrical shape of the flexible armband An end fixing device, and (b) located on the outer peripheral side of the cylindrical flexible armband and in the vicinity of the proximal end of the flexible armband, and is bent into the cylindrical shape. A winding roller supported on the machine frame so as to be rotatable about a rotation axis substantially parallel to the central axis of the flexible armband, and (c) in contact with the outer peripheral surface of the flexible armband A fastening tape disposed along the flexible armband, with one end fixed to the base end of the armband and the other end wound around the winding roller; and Arranged along the flexible armband in contact with the outer peripheral surface of the flexible armband, one end is fixed to the tip of the armband and the other end is fastened to the winding roller. A release tape wound in a direction opposite to the attaching tape; and (e) when the diameter of the flexible armband is reduced, the take-up roller is driven to rotate in a direction in which tension is applied to the fastening tape. the during diameter of FLEXIBLE cuff and rotation drive device and the direction for rotating the take-up roller in a direction that gives tension to the release tape an opposite, containing only (f) with respect to the tightening The tapes are two tapes each having a width smaller than the width of the flexible armband and positioned along both ends in the width direction of the flexible armband, and the release tape is A width smaller than the width of the flexible armband and positioned along the center line in the width direction of the flexible armband It is to be a single tape .
[0006]
【The invention's effect】
In this way, when the take-up roller is driven to rotate in the direction in which tension is applied to the fastening tape by the rotation driving device, the cylindrical flexible member around which the fastening tape is wound around the outer peripheral surface. The armband is reduced in diameter and wound around a part of the living body. Conversely, when the take-up roller is driven to rotate in a direction in which tension is applied to the release tape by the rotation drive device, the tip of the arm band to which one end of the release tape is fixed is returned in the circumferential direction to form a cylinder. The shape of the flexible armband is expanded and the living body is released. According to the armband winding device of the present invention configured as described above, the conventional blood pressure of a type in which the diameter of the flexible armband is reduced by pulling the distal end portion of the flexible armband along a straight line. Compared to the armband winding device for measurement, the armband winding device becomes smaller, and the automatic blood pressure measuring device including the armband winding device can be made smaller. Further, since the two fastening tapes are respectively positioned along the both ends in the width direction of the flexible armband, the expansion bag in the armband is at the time of the diameter reduction of the armband. There is an advantage that the tightening shape when expanded is stable.
[0007]
In addition, according to the present invention, the fastening tape and the release tape disposed in contact with the outer peripheral surface of the flexible armband that is bent into a cylindrical shape are pulled to form a cylindrical shape. Since the bent flexible armband is reduced in diameter and expanded, the flexible armband is held in a cylindrical shape even if the rigidity of the flexible armband is not so high. There are advantages to choose.
[0008]
Other aspects of the invention
Here, preferably, the winding roller has an outer diameter smaller than a minimum diameter of the flexible arm band that is bent into the cylindrical shape. In this way, there is an advantage that the wristband winding device for measuring blood pressure is further reduced in size.
[0010]
Preferably, a guide device is provided for guiding the distal end of the flexible armband in the circumferential direction when the flexible armband is expanded or contracted. In this way, when the flexible armband is expanded or contracted, the distal end of the flexible armband is guided in the circumferential direction of the armband that has been bent into a cylindrical shape. There is an advantage that the shape is held in a relatively accurate cylinder.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 and FIG. 2 are perspective views showing an armband winding device 10 housed in a box (outer case) of an automatic blood pressure measuring device (not shown), and FIG. 1 is a perspective view of the front and left side. FIG. 2 and FIG. 2 are perspective views of the front and right side. The armband 12 of the armband winding apparatus 10 is bent in a cylindrical shape, and the box body is relatively large for allowing a biological arm to be inserted into the armband 12. The opening is formed so as to be substantially concentric with the axial center of the arm band 12 that is bent into a cylindrical shape. It should be noted that, in order to avoid a sense of incongruity in the posture at the time of blood pressure measurement, usually, the box body so that the axial center A of the cylinder formed by the armband 12 is inclined at a predetermined angle, for example, about 10 to 15 degrees with respect to the horizontal plane. 10 is fixed to the inner bottom wall.
[0013]
The arm band 12 is for compressing an artery in the upper arm for blood pressure measurement. As shown in FIG. 3, a longitudinal inflatable bag 16 made of a bag-like resin bag or a rubber bag, polyester, and the like. Resin sheet, flexible belt 18 made of a relatively rigid resin that can be elastically deformed, such as a knitted belt coated with urethane or vinyl chloride, or a relatively rigid cloth, and a swelled plate. A longitudinal outer bag 20 made of a cloth or a soft resin sheet that accommodates the inflatable bag 16 and the flexible belt 18 with the bag 16 positioned on the inner peripheral side is provided. Thus, the cylindrical shape is spatially maintained by the relatively rigid flexible belt 18, and in the state where the flexible belt 18 is wound around the upper arm, the artery in the upper arm is compressed by the expansion of the expansion bag 16. At the same time, the arm band 12 can be handled like a single flexible band.
[0014]
1 and 2, the machine casings 24 and 26 are directly or indirectly fixed to a box (not shown). The machine frame 24 functions as an arm band base end fixing device that supports a base end portion positioned on the lower side of the curved shape on the cylinder of the arm band 12 so that the base end portion is fixed in position. In this case, the longitudinal plate material having a width sufficiently smaller than the minimum diameter dimension of the armband 12 that has been turned is bent into an inverted U shape, whereby the flexibility in the proximal end portion of the armband 12 is achieved. The belt 18 includes an upper wall portion 30 fixed by rivets or screws (not shown), and a pair of vertical walls 32 and 34 that fall from both ends of the upper wall portion 30.
[0015]
The machine frame 26 is formed by bending a longitudinal plate having a width slightly larger than the maximum diameter dimension of the bent armband 12 into a U-shape so that the bottom wall 36 and its bottom A base end portion of the armband 12 which is composed of a pair of vertical walls 38 and 40 rising from both ends of the wall 36 and is located inside the machine frame 24 and supported by the machine frame 24 is substantially the center in the width direction. The bottom wall 36 is fixed to the inner side of the box in a relative positional relationship with the machine frame 24 located at the center. The interval between the vertical walls 38 and 40 is set to a value slightly larger than the width dimension of the armband 12.
[0016]
At the tips or upper ends of the vertical walls 38 and 40 of the machine frame 26, a straight line parallel to the bottom wall 36 and an arc similar to a part of the outer circumference circle at the maximum diameter of the armband 12 that is bent. Each of the notches 42 is formed. Further, a first guide plate 44 made of a curved plate that is substantially concentric with the cylindrical shape of the armband 12 that has been bent is between the upper end edges of the vertical walls 38 and 40 and on the arc-shaped side portion of the notch 42. It is fixed by fixing means such as screwing or welding, and, like the first guide plate 44, is curved so as to be substantially concentric with the cylindrical shape of the armband 12 that is bent, and the first guide. A second guide plate 46 is fixed between the vertical walls 38 and 40 and is separated from the outer periphery of the plate 44 by a fixed distance of about 15 to 20 mm. Since the distal end portion of the armband 12 that has been turned is positioned between the first guide plate 44 and the second guide plate 46, the armband 12 is expanded when the armband 12 is expanded or contracted. The leading end of each is guided in a substantially circumferential direction of the curved cylinder. In the present embodiment, the first guide plate 44 and the second guide plate 46 function as a guide device that guides the distal end portion of the armband 12 in a substantially circumferential direction.
[0017]
The flexible armband 12 which is located in the vicinity of the base end of the flexible armband 12 on the outer peripheral side of the flexible armband 12 which is bent in a cylindrical shape and which is bent in the cylindrical shape A take-up roller 50 having a rotation axis substantially parallel to the central axis of the machine frame 26 is supported by the machine frame 26 so as to be rotatable between the vertical walls 38 and 40 of the machine frame 26. That is, the take-up roller 50 is rotatable at the corner of the upper end of the vertical walls 38 and 40 of the machine frame 26 and opposite to the side where the first guide plate 44 and the second guide plate 46 are provided. It is supported by. The winding roller 50 has an outer diameter that is sufficiently smaller than the minimum diameter of the flexible armband 12 that is bent into a cylindrical shape.
[0018]
The speed reducer-equipped electric motor 52 is fixed to the vertical wall 40 of the machine frame 26, and the gear 54 fixed to the output shaft of the speed reducer-equipped electric motor 52 is an intermediate gear rotatably attached to the vertical wall 40. 56 is engaged with a gear 58 fixed to the shaft end of the winding roller 50. Thereby, the winding roller 50 is rotationally driven by the speed reducer-equipped electric motor 52. In the present embodiment, the speed reducer-equipped electric motor 52, the gear 54, the intermediate gear 56, and the gear 58 constitute a rotation driving device. Further, an electromagnetic brake 59 for preventing the rotation of the rotor in the electric motor with speed reducer 52 is provided at the rear end of the electric motor with speed reducer 52. The electromagnetic brake 59 operates at the same time as the electric motor 52 with a speed reducer tightens the armband 12 and the rotation thereof is stopped to prevent the armband 12 from being loosened. Is functioning as
[0019]
As shown in FIG. 4, the flexible armband 12 is disposed along the armband 12 in contact with the outer circumferential surface of the armband 12, and the base end of the armband 12. A fastening tape 60 having one end fixed to an end of the machine frame 24 fixed to the upper wall 30 of the machine frame 24 and the other end wound around the take-up roller 50, and the armband 12 The winding roller 50 is disposed along the armband 12 in contact with the outer peripheral surface, one end is fixed to the tip of the armband 12 and the other end faces away from the fastening tape 60. And a release tape 62 wound around. In other words, the fastening tape 60 and the release tape 62 are wound around the outer peripheral surface of the arm band 12 that is turned in a cylindrical shape.
[0020]
The fastening tape 60 has a width dimension sufficiently smaller than the width of the arm band 12, for example, a width dimension equal to or less than ¼, and is positioned along both ends in the width direction of the arm band 12. The release tape 62 has a width dimension that is sufficiently smaller than the width of the armband 12 and is along the center line in the width direction of the armband 12. Is a single tape. Preferably, the fastening tape 60 and the release tape 62 are made of a non-stretchable resin sheet, carbon fiber, or resin fiber.
[0021]
In the armband winding device 10 configured as described above, the take-up roller 50 is rotationally driven in the direction of reducing the diameter of the armband 12, that is, the counterclockwise direction indicated by the arrow in FIG. Then, since the tension in the direction shown by the arrow in FIGS. 1 and 2 is applied to the fastening tape 60, the distal end portion of the arm band 12 that is bent into a cylindrical shape is cylindrical in the vicinity of the proximal end portion. Is moved in the tangential direction on the outside, and the diameter is reduced as a whole. On the other hand, when the take-up roller 50 is rotationally driven in the direction of expanding the armband 12, that is, the clockwise direction indicated by the arrow in FIG. Since the tension in the direction shown by the arrow 6 is applied, the arm band 12 that is turned into a cylindrical shape is expanded in diameter.
[0022]
FIG. 7 is a block diagram illustrating a configuration of an automatic blood pressure measurement device including the armband winding device 10. In the drawing, an expansion bag 16 in an armband 12, that is, a cuff is connected to a pressure sensor 142, an exhaust control valve 144, and an air pump 146 via a pipe 148, and the expansion bag 16 is provided on the inner peripheral surface. The base end portion of the armband 12 that is bent in a cylindrical shape is fixed to the machine frame 24 and the distal end thereof is moved in the diameter reducing direction by a winding roller 50 driven by an electric motor 52 with a speed reducer. It has become. The output signal of the pressure sensor 142 is discriminated by a band pass filter 154, and a pulse wave signal SM, which is a pressure vibration in the expansion bag 16 generated in synchronization with the pulse, is supplied to the A / D converter 158 of the arithmetic control circuit 156. The The output signal of the pressure sensor 142 is discriminated by the low-pass filter 160, and the cuff pressure signal SK representing the static pressure in the expansion bag 16 is supplied to the A / D converter 158 of the arithmetic control circuit 156.
[0023]
The arithmetic control circuit 156 is a microcomputer including a CPU 162, a ROM 164, a RAM 166, an input interface circuit 168, an output interface circuit 170, and the like. The CPU 162 processes the input signal according to the procedure stored in the ROM 164 in advance using the temporary storage function of the RAM 166, and outputs a drive signal, a display signal, and the like.
[0024]
That is, when measuring blood pressure, the CPU 162 drives the motor 52 with a speed reducer according to a predetermined procedure to rotate the winding roller 50 in the direction of the arrow in FIG. The cylinder D is reduced in diameter and the inflatable bag 16 disposed inside the armband 12 can be inserted between the upper arm and the armband 12 with a predetermined tension, for example, two or three fingers, into the upper arm portion of the living body. By pulling the distal end side of the arm band 12 with a certain degree of tension in the substantially tangential direction of the cylinder in the vicinity of the base end part, the arm band 12 is reduced in diameter and wound around the upper arm. 5 and 6 show this state.
[0025]
Next, the CPU 162 drives the air pump 146 to rapidly pressurize the inflatable bag 16 and presses the inflatable bag 16 to a pressure at which the artery in the upper arm is stopped. Subsequently, the CPU 162 drives the exhaust control valve 144 to gradually decrease the compression pressure of the expansion bag 16 at a speed of, for example, about 3 mmHg / sec, and the pulse wave signal SM and the cuff pressure signal obtained in the gradually decreasing process. Based on the SK, the blood pressure value is determined by the oscillometric method, and the blood pressure value is displayed on the display 172.
[0026]
Further, when the blood pressure value is determined as described above, the CPU 162 releases the pressure in the expansion bag 16 to the atmospheric pressure by the exhaust control valve 144 in order to release the upper arm of the person to be measured. The motor 52 with a speed reducer is reversely rotated in the direction opposite to the time. As a result, the arm band 12 is fed upward from the machine casing 26, whereby the diameter D of the cylinder formed by the arm band 12 is expanded. 1 and 2 illustrate this state.
[0027]
As described above, according to the present embodiment, when the take-up roller 50 is rotationally driven in a direction in which tension is applied to the fastening tape 60 by a rotary drive device such as the electric motor 52 with a speed reducer, the fastening roller 50 is used for fastening. The cylindrical flexible armband 12 around which the tape 60 is wound around the outer peripheral surface is reduced in diameter and wound around a part of the living body. On the other hand, when the winding roller 50 is rotationally driven in the direction in which tension is applied to the release tape 62 by the rotational driving device, the distal end portion of the arm band 12 to which one end portion of the release tape 62 is fixed is in the circumferential direction. The cylindrical flexible armband 12 is expanded to return to the living body. Therefore, compared with the conventional armband winding device for blood pressure measurement of the type in which the flexible armband is reduced in diameter by pulling the tip of the flexible armband along a straight line, As the device 10 becomes smaller, the automatic blood pressure measuring device including the armband winding device 10 can be made smaller.
[0028]
Further, according to the present embodiment, the fastening tape 60 and the release tape 62 wound in contact with the outer peripheral surface of the flexible armband 12 that is bent into a cylindrical shape are pulled, respectively. Since the flexible armband 12 that has been turned into a cylindrical shape is contracted and expanded, the flexible armband 12 is held in a cylindrical shape even if the rigidity of the flexible armband 12 is not so high. There is an advantage that a soft material can be selected.
[0029]
In addition, according to the present embodiment, the winding roller 50 has an outer diameter sufficiently smaller than the minimum diameter of the flexible armband 12 that is bent into a cylindrical shape. There is an advantage that the band winding device, in particular, the size in the width direction is further reduced.
[0030]
In addition, according to the present embodiment, the fastening tape 60 has a width smaller than the width of the flexible armband 12 and is positioned along both end portions in the width direction of the armband 12. The release tape 62 is a single tape having a width smaller than the width of the arm band 12 and positioned along the center line in the width direction of the arm band 12. Since these two fastening tapes 60 are positioned along both ends of the flexible armband 12 in the width direction, the armband 12 has a reduced diameter, There is an advantage that the tightening shape when the expansion bag is expanded is stabilized.
[0031]
In addition, according to the present embodiment, when the flexible armband 12 is expanded or contracted, the distal end portion of the flexible armband 12 has the pair of first guide plates 44 and second that constitute the guide device. Since it is guided between the guide plates 46 in the circumferential direction of the arm band 12 that is bent in a cylindrical shape, the bent shape of the flexible arm band 12 is held in a relatively accurate cylinder. There are advantages.
[0032]
As mentioned above, although one Example of this invention was described based on drawing, this invention is applied also in another aspect.
[0033]
For example, in the above-described embodiment, the guide device for guiding the distal end portion of the flexible armband 12 in the circumferential direction when the diameter of the flexible armband 12 is increased or decreased is a pair of first guide plates. 44 and the second guide plate 46, but a plurality of guide rollers provided rotatably at a place where the pair of the first guide plate 44 and the second guide plate 46 are provided. Also good.
[0034]
In the above-described embodiment, the other end of the fastening tape 60 is wound around the winding roller 50 counterclockwise, and the other end of the release tape 62 is wound around the winding roller 50 clockwise. However, the other end of the fastening tape 60 may be wound around the winding roller 50 clockwise, and the other end of the release tape 62 may be wound around the winding roller 50 counterclockwise. In short, the other end portions of the fastening tape 60 and the release tape 62 may be wound around the winding roller 50 in opposite directions.
[0035]
Further, in the above-described embodiment, the two fastening tapes 60 and the release tape 62 are wound around the outer peripheral surface of the arm band 12 that is turned into a cylindrical shape. The width dimension and the number of the release tape 62 can be variously changed.
[0036]
Moreover, although the arm band 12 of the above-mentioned embodiment was provided with the outer bag 20, it does not necessarily have to be provided. For example, the flexible belt 18 and the outer peripheral side sheet of the expansion bag 16 are common. The inner circumferential side sheet of the expansion bag 16 may be made of a composite sheet material in which a rubber sheet or a resin sheet and a cloth or a nonwoven fabric are laminated.
[0037]
In the above-described embodiment, instead of the electromagnetic brake 59 functioning as an armband loosening prevention device, another armband loosening prevention device that prevents rotation of the gears 54, 56, 58, etc. by operating with an electromagnet. May be used.
[0038]
The above description is merely an example of the present invention, and the present invention can be variously modified without departing from the spirit of the present invention.
[Brief description of the drawings]
FIG. 1 is a perspective view for explaining an arm band winding device according to an embodiment of the present invention, and shows a front side and a left side.
FIG. 2 is a perspective view for explaining the embodiment of FIG. 1 and showing the front side and the right side.
FIG. 3 is a view in which a part of the base end portion of the armband is cut away in order to explain the configuration of the base end portion of the armband of FIG. 1;
4 is a view for explaining the relationship between the armband of FIG. 1 and a fastening tape and a release tape wound around the outer peripheral surface thereof. FIG.
5 is a perspective view showing a diameter-reduced state of the embodiment of FIG. 1, and shows a front side and a left side. FIG.
6 is a perspective view showing a diameter-reduced state of the embodiment of FIG. 1, and shows a front side and a right side. FIG.
7 is a block diagram for explaining the electrical configuration of the automatic blood pressure measurement device including the embodiment of FIG. 1; FIG.
[Explanation of symbols]
10: Armband winding device 12: Armband 24: Machine frame (armband proximal end fixing device)
44: first guide plate, 46: second guide plate (guide device)
50: Winding roller 52: Electric motor with reduction gear, 54, 58: Gear, 56: Intermediate gear (rotary drive device)
60: Tightening tape 62: Release tape

Claims (3)

A blood pressure measurement armband wrapping device for winding a flexible armband around a part of a living body by reducing the diameter of the flexible armband that is bent into a cylindrical shape when measuring blood pressure,
An arm band base end fixing device that supports the base end part of the flexible arm band in a substantially tangential direction of the cylindrical shape of the flexible arm band;
The center of the flexible armband which is located in the vicinity of the base end portion of the flexible armband on the outer peripheral side of the flexible armband which is bent in the cylindrical shape A take-up roller supported by the machine frame so as to be rotatable about a rotation axis substantially parallel to the shaft;
Arranged along the flexible armband in contact with the outer peripheral surface of the flexible armband, one end is fixed to the base end of the armband, and the other end is connected to the winding roller A wound fastening tape;
The armband is disposed along the flexible armband in contact with the outer peripheral surface of the flexible armband, one end is fixed to the tip of the armband, and the other end is attached to the winding roller. A release tape wound in the opposite direction to the fastening tape;
When the diameter of the flexible armband is reduced, the winding roller is driven to rotate in a direction in which tension is applied to the fastening tape. When the diameter of the flexible armband is expanded, the direction is opposite to the direction. a rotary drive device for the take-preparative roller to the release tape in the direction of tensioning rotationally driven, seen including
The fastening tape is two tapes each having a width smaller than the width of the flexible armband and positioned along both ends in the width direction of the flexible armband, The release tape is a single tape having a width smaller than the width of the flexible armband and positioned along the center line in the width direction of the flexible armband. Arm band winding device for blood pressure measurement. The blood pressure measurement armband wrapping device according to claim 1 , further comprising a guide device that guides a distal end portion of the flexible armband in a circumferential direction when the diameter of the flexible armband is expanded or contracted. The armband winding device for blood pressure measurement according to any one of claims 1 to 2 , wherein the winding roller has an outer diameter smaller than a minimum diameter of the flexible armband that is curved in the cylindrical shape. .

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