WO2016101889A1

WO2016101889A1 - Automatic blood measurement apparatus

Info

Publication number: WO2016101889A1
Application number: PCT/CN2015/098390
Authority: WO
Inventors: 吴小光
Original assignee: 深圳瑞光康泰科技有限公司
Priority date: 2014-12-24
Filing date: 2015-12-23
Publication date: 2016-06-30
Also published as: CN104434073B; HK1208609A1; CN104434073A

Abstract

An automatic blood measurement apparatus, comprising a support housing (1), a sleeve outer casing (2), a balloon cuff (4), a tightening mechanism (5), and a tightening motor (58). The tightening mechanism (5) comprises: a support frame; a drive shaft (51), arranged on one side of the balloon cuff (4) and mounted in the support frame by spanning the balloon cuff (4), one end being connected to the tightening motor (58); and a driven shaft (52), arranged on the other side of the balloon cuff (4) and mounted in the support frame by spanning the balloon cuff (4) opposite the drive shaft (51); the drive shaft (51) and the driven shaft (52) move relative to each other to tighten the balloon cuff (4); by means of the rotation of the drive shaft (51), the balloon cuff (4) can thus be tightened and be returned into a relaxed position. The present blood measurement apparatus significantly reduces the unidirectional pressure on the limb being tested, and improves the measurement accuracy of the automatic blood measurement apparatus.

Description

Automatic blood pressure measuring device

Technical field

The present invention relates to a blood pressure measuring device, and more particularly to an automatic blood pressure measuring device.

Background technique

Blood pressure is one of the most important medical parameters of the human body. The most commonly used blood pressure test method is non-invasive blood pressure measurement. The automatic blood pressure measurement is very popular among users because it does not require manual intervention.

However, in the automatic blood pressure measuring device in the past, the automatic tightening mechanism of the airbag cuff is unreasonable, and the measured portion cannot be freely moved, so that the measurement error is large. Therefore, in the case where the accuracy of blood pressure measurement is high, manual measurement is generally used, but manual measurement cannot avoid artificial error.

Airbag cuff type non-invasive blood pressure measurement has a hypothesis: when the pressure in the airbag gradually decreases from high to low, when the blood in the blood vessel recovers from the blocked state, the pressure inside the airbag is equal to the systolic pressure; when the pressure in the airbag continues to be high to low Gradually, the pressure inside the balloon is equal to the diastolic pressure when the blood vessel is fully opened. In the prior art, the automatic blood pressure measuring device forcibly fixes the measured limb to a certain position when wrapping the airbag cuff, or the airbag cuff can only swing in one direction, and the measurement may cause a large error. In general, the measurement accuracy of the prior art automatic blood pressure measuring device needs to be improved.

Summary of the invention

It is an object of the present invention to provide an improved automatic blood pressure measuring device that compensates for the deficiencies of the prior art and improves the measurement accuracy of the automatic blood pressure measuring device.

Another object of the present invention is to optimize the structure of the automatic blood pressure measuring device to improve the quality of the automatic blood pressure measuring device and to facilitate the production and maintenance of the automatic blood pressure measuring device.

Accordingly, the present invention provides an automatic blood pressure measuring device including a support housing, a sleeve, an airbag cuff, a tightening mechanism, and a tightening motor, wherein the tightening mechanism includes: a support frame; a drive shaft, Mounted in the support frame on one side of the airbag cuff across the airbag cuff, and one end connected to the tightening motor; and a driven shaft on the other side of the airbag cuff to span the airbag sleeve The belt is mounted in the support frame in a manner opposite to the drive shaft, and the drive shaft and the driven shaft are relatively movable to clamp the airbag cuff, whereby the airbag sleeve can be tightened by the rotation of the drive shaft The belt and the airbag cuff are moved in a relaxed return direction.

Preferably, the drive shaft is one, and the driven shaft is two, and the two driven shafts respectively form a clamping airbag sleeve on opposite sides of the drive shaft opposite to the drive shaft. The nip area of the belt.

Preferably, the drive shaft is fixed in position in the support frame, and the driven shaft is mounted on the movable bracket and is movable relative to the drive shaft to be close to or away from the drive shaft.

Preferably, a locking airbag is mounted between the bottom wall of the support frame and the movable bracket, and the locking airbag drives the movable bracket to move, thereby forcing the driven shaft to be close to or away from the drive shaft.

Preferably, the support frame includes an upper clamp plate and a lower clamp plate, and the movable bracket is a movable clamp plate, wherein the drive shaft is mounted on the upper clamp plate, and the lock airbag is installed between the movable clamp plate and the lower clamp plate.

Preferably, the drive shaft is wrapped with a soft shaft to enclose the soft outer skin so as to have sufficient rigidity to generate sufficient friction to the airbag cuff, and from the closer end to the far end of the test subject, the drive shaft The outer diameter gradually changes from large to small to form a cone shape.

Preferably, the driven shaft is wrapped with a soft shaft to enclose the soft outer skin so as to have sufficient rigidity to generate sufficient friction to the airbag cuff and drive from the near end to the far end of the test subject. The outer diameter of the shaft gradually changes from large to small to form a cone shape.

Preferably, the airbag cuff includes an inner ring airbag segment, an outer ring airbag segment, and a drag segment;

The airbag cuff is provided with a supporting keel, and the supporting keel is placed in the keel connecting sleeve, and the supporting keel is connected and fixed only at a position corresponding to the position between the inner ring airbag segment and the outer ring airbag segment with respect to the keel connecting sleeve. The rest can be twitched freely.

Preferably, the overall shape of the airbag cuff is in the shape of a fan ring; the airbag cuff is provided with a supporting keel, and the supporting keel is placed in the keel connecting sleeve; for the inner ring airbag segment, when only one airbag is installed, The width of the support keel is substantially equal to the width of the one airbag, and in the case where two or more airbags are mounted, the width of the support keel is substantially equal to the width of the airbag near the long curved side of the airbag cuff; and, at least At the position corresponding to the drag segment, the width of the support keel is reduced to about 1/3 of the width of the outer balloon segment.

Preferably, the width of the support keel is also reduced to about 1/3 of the width of the outer balloon segment at a position corresponding to at least a portion of the outer balloon segment.

Preferably, the cooperation of the drive shaft and the driven shaft can generate a branch that is disposed on the drag segment Space for free movement of the keel.

Preferably, the driven shaft has a recess corresponding to the supporting keel provided to the drag section so as to be able to generate a space for freely supporting the supporting keel provided on the drag section.

Preferably, the two ends of the driven shaft are wrapped with a soft shaft to wrap the soft outer skin so as to have sufficient rigidity to generate sufficient friction to the airbag cuff, and from the closer to the end of the testee to At the far end, the outer diameters of the both ends of the driven shaft gradually change from large to small to form a pyramid shape; and the intermediate portion of the driven shaft does not wrap the soft outer skin to form the concave portion.

The present invention also provides an automatic blood pressure measuring device comprising a support housing, a sleeve, an airbag cuff, a tightening mechanism and a tightening motor, wherein the tightening mechanism and the outer casing of the sleeve are connected by a rotating shaft, The tightening mechanism can swing up and down in the sleeve with the rotating shaft as a center.

Preferably, the sleeve housing is mounted on a platform that is rotatable left and right, the platform being coupled to the support housing.

Preferably, an elbow joint positioning indicating switch is installed near the rotating shaft connection of the tightening mechanism. When the elbow joint is not accurately placed on the positioning indicating switch, the elbow joint positioning indication switch operates and sends a position error signal, and the measuring process cannot continue. When the measuring device sends a prompt signal, when the elbow joint is accurately placed on the positioning indicating switch, the elbow joint positioning indication switch operates and sends a position normal signal, and the measuring process can continue.

Preferably, under the tightening mechanism, a bottom of the sleeve is mounted with a lifting mechanism lifting state indicating switch. During the measuring process, if the tightening mechanism is not near the end of the measured object, it is not in the raised state, but is pressed. Immediately at the bottom, at this time, the up state indicating switch sends an error status signal, the measuring device sends a prompt signal, and the measuring process cannot continue. When the tightening mechanism is closer to the tested person, the error state signal disappears after returning to the raised and suspended state. The measurement process continues.

Preferably, under the tightening mechanism, the bottom of the sleeve is equipped with a tightening mechanism to lift the airbag. When blood pressure measurement is required, the tightening mechanism raises the airbag to inflate, and the tightening mechanism swings upwardly with the shaft as the center of the shaft. The tightening mechanism is in close contact with the limb of the test subject, and the tightening mechanism starts to tighten the airbag cuff. After the airbag cuff is wrapped around the limb of the test subject, the tightening mechanism lifts the airbag to deflate.

The inventor of the present application found that in order to make the pressure inside the balloon as close as possible to the intravascular pressure, the airbag cuff must be required to be evenly stressed in all directions when wrapping the limb to be tested. If the force is applied in one direction, the pressure and blood vessel in the balloon will be caused. The internal pressure deviation is too large, which affects the measurement accuracy.

In the prior art, when the automatic blood pressure measuring device wraps the airbag cuff, the airbag cuff cannot move freely following the positional change of the measured limb, but the patient is forcibly fixed at a certain position. The airbag cuff can only be oscillated in one direction, so that the airbag cuff produces a large unidirectional pressure on the measured limb, resulting in a large error in the measurement.

The main object of the present invention is to improve the measurement accuracy of the automatic blood pressure measuring device. To this end, a comprehensive improvement has been made to the prior art, and a completely structured automatic blood pressure measuring device has been proposed.

In order to ensure the measurement accuracy, the airbag cuff must be minimized for the single-direction external force of the measured limb. During the measurement, the elbow joint can be fixed at a certain position without affecting the measurement accuracy, in order to ensure that during the measurement process, The additional force applied to the upper arm by the airbag cuff caused by the body shake of the subject.

The tightening mechanism of the invention is a brand-new structure, which adopts the roller shaft friction driving method, can obtain a good function of controlling the cuff zooming, and can be beneficial to designing other structures of the automatic blood pressure measuring device to improve the measuring precision. improvement of.

Further, the tightening mechanism of the present invention can be designed to match the structure of the cuff proposed by the present invention, and the measurement accuracy of the automatic blood pressure measuring device can be improved. The tightening mechanism of the present invention can be made lightly to minimize the occurrence of undesirable stresses during measurement.

Further, the tightening mechanism of the present invention can be further designed to swing up and down about the rotation axis with respect to the outer casing of the sleeve. By forming the tightening motor into a rigid connection with the end of the drive shaft, it is also possible to form a structure that is balanced with the body of the take-up mechanism by the weight of the take-up motor to further reduce the influence of the weight of the tightening mechanism on the measurement accuracy.

DRAWINGS

Fig. 1 is a perspective view of an automatic blood pressure measuring device according to an embodiment of the present invention.

2 is a perspective view showing a first combined structure of an airbag cuff, a tightening mechanism, and a tightening motor according to an embodiment of the present invention.

3 is a perspective view showing a second combined structure of an airbag cuff, a tightening mechanism, and a tightening motor according to an embodiment of the present invention.

4 is a cross-sectional view of an automatic blood pressure measuring device according to an embodiment of the present invention, in which the tightening mechanism is in an initial state.

Figure 5 is a cross-sectional view of the automatic blood pressure measuring device according to the embodiment of the present invention, wherein the tightening mechanism is in the raised state 1.

Fig. 6 is a cross-sectional view showing the automatic blood pressure measuring device according to the embodiment of the present invention, in which the tightening mechanism is in the raised state 2.

Fig. 7 is a partial cross-sectional view showing the take-up mechanism in an initial state.

Figure 8 is a partial cross-sectional view showing the squeezing mechanism in a twitched state.

Figure 9 is a partial cross-sectional view showing the tightening mechanism in a visually locked state.

Figure 10 is a partial cross-sectional view showing the tightening mechanism in a restored state.

Figure 11 is a cross-sectional view showing an automatic blood pressure measuring device of an embodiment of the present invention showing an initial state of the cuff.

Figure 12 is a cross-sectional view showing an automatic blood pressure measuring device according to an embodiment of the present invention in a cuff twitch state.

Figure 13 is a cross-sectional view showing an automatic blood pressure measuring device of an embodiment of the present invention showing a minimum state of cuff tightening.

Figure 14 is a schematic view of a drive shaft in accordance with an embodiment of the present invention.

Figure 15 is a schematic view of a driven shaft according to an embodiment of the present invention.

Figure 16 is a development view of an airbag cuff according to an embodiment of the present invention.

Figure 17 is a cross-sectional view of the airbag cuff shown in Figure 16 taken along line X-X.

Figure 18 is a schematic view of a supporting keel according to an embodiment of the present invention.

19 is a schematic view of a keel joint sleeve according to an embodiment of the present invention.

Fig. 20 is a plan view showing an initial state in which the airbag cuff is laterally slid.

Fig. 21 is a plan view showing an intermediate state in which the airbag belt is laterally slid.

Fig. 22 is a plan view showing the maximum state in which the airbag cuff is laterally slid.

detailed description

Hereinafter, an embodiment of the automatic blood pressure measuring device of the present invention will be described with reference to the drawings.

The embodiments described herein are illustrative of specific embodiments of the invention, and are intended to be illustrative of the embodiments of the invention. In addition to the implementations described herein, those skilled in the art will be able to devise other obvious technical solutions based on the disclosure of the present application and the specification, which includes any obvious use of the embodiments described herein. Replacement and modification of the technical solution.

The drawings of the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and their mutual relations. It is to be noted that, in order to facilitate the clarity of the structure of the components of the embodiments of the present invention, the drawings are not necessarily drawn to the same scale. The same reference numerals are used to denote the same parts. In addition, when describing with reference to the drawings, for convenience of presentation, the square is adopted. The words such as "upper", "lower", "front", "post", etc., do not constitute a specific limitation on the structure of the features.

1-6, a high-precision automatic blood pressure measuring device according to an embodiment of the present invention includes a support housing 1, a sleeve housing 2, a rotating platform 3, an airbag cuff 4, a tightening mechanism 5, an elbow joint positioning indicating switch 6, and tightening. The mechanism lifts the state indicating switch 7, and the tightening mechanism lifts the airbag 8 and the like. Fig. 2 is a perspective view showing the tightening mechanism of the embodiment of the present invention.

1 is an external view of a high-precision automatic blood pressure measuring device according to an embodiment of the present invention, which also shows a display screen, a button, and the like. An electric control portion is housed in the support housing 1. Note that this embodiment is merely exemplary, and the automatic blood pressure measuring device of the present invention can also be combined with a control portion such as a computer, whereby a computer or the like can replace functions such as input, display, and electronic control. Further, it will be understood by those skilled in the art that the main body of the automatic blood pressure measuring device of the present invention can be more simply designed to have only the sleeve and its supporting portion.

In order to ensure the measurement accuracy, the airbag cuff must be minimized in the single-direction external force of the measured limb. During the measurement, the elbow joint can be fixed at a certain position without affecting the measurement accuracy. In order to ensure that during the measurement, there is no additional force on the upper arm of the airbag cuff caused by the body shake of the subject, the horizontal rotating platform 3 is used, and the tightening mechanism 5 which is substantially vertically tilted is added.

As shown in Figures 1 and 2, the sleeve housing 2 of the measuring device is mounted on a rotating platform 3 which is rotatable left and right. The tightening mechanism 5 is coupled to the sleeve housing 2 by a rotating shaft 59 which can be inside the sleeve housing 2 The rotating shaft 59 swings up and down for the pivot. When the elbow joint of the subject is placed on the elbow joint positioning indicating switch 6, the airbag cuff 4 can be moved with the body of the subject to shake, ensuring measurement accuracy.

7-9 is a schematic view of the tightening mechanism 5 swinging up and down in the sleeve casing 2 with the rotating shaft 59 as a pivot. The elbow joint positioning indicator switch 6 is installed near the shaft connection. During the measurement, when the elbow joint is not accurately placed on the elbow joint positioning indication switch 6, the elbow joint positioning indication switch 6 operates and sends a position error signal, and the measurement process cannot continue. When the measurement is performed, the measuring device sends a prompt signal; when the elbow joint is accurately placed on the elbow joint positioning indication switch 6, the elbow joint positioning indication switch 6 operates and sends a position normal signal, and the measurement process can continue.

In order to better fit the airbag cuff 4 around the limb of the subject, under the grasping mechanism 5, at the bottom of the sleeve casing 2, a tightening mechanism is attached to lift the airbag 8, when blood pressure measurement is required, The tightening mechanism raises the airbag 8 to inflate, and the tightening mechanism 5 swings upward with the shaft 59 as a center, so that the tightening mechanism 5 is in close contact with the limb of the subject, and the tightening mechanism 5 starts to tighten the airbag cuff 4, and the airbag cuff is to be 4 After the parcel of the test subject is completed, the tightening mechanism lifts the air bag 8 to deflate. Below the tightening mechanism 5, a suction mechanism lift state indicating switch 7 is attached to the bottom of the sleeve casing 2. During the measurement process, if the proximal end of the tightening mechanism 5 is not in the raised and suspended state, but the bottom is pressed, the measurement accuracy will be affected, and the tightening mechanism raises the state indicating switch 7 to issue an error. The status signal, the measuring device sends a prompt signal, and the measurement process cannot continue; when the tightening mechanism 5 is closer to the lifted state, the error state signal disappears and the measurement process continues.

The blood pressure measurement is performed as follows: when blood pressure needs to be measured, the limb of the subject passes through the blood pressure measuring sleeve, and the elbow joint is placed on the elbow joint positioning indicator switch 6, and the tightening mechanism lifts the airbag 8 to inflate and tighten. The mechanism 5 is lifted up; the tightening mechanism 5 swings upward with the shaft 59 as a center, so that the tightening mechanism 5 is in close contact with the limb of the subject, and the tightening mechanism 5 starts to tighten the airbag cuff 4, and the airbag cuff 4 wraps the subject After the limb is completed, the tightening mechanism lifts the airbag 8 to deflate, and the airbag cuff 4 is inflated and pressurized to a certain value, the airbag cuff 4 is gradually deflated, and the tightening mechanism 5 is reversely rotated to restore the airbag cuff to the initial state. The limb of the subject was taken out from the blood pressure measuring sleeve and the measurement was completed.

The up-and-down swinging and tightening mechanism and the rotating platform of the invention enable the cuff to cooperate well with the limb of the subject, which significantly reduces the unidirectional pressure generated by the measured limb, and is advantageous for improving the measurement accuracy of the device.

2 is a perspective view showing a first combined structure of an airbag cuff, a tightening mechanism, and a tightening motor according to an embodiment of the present invention, in which a tightening mechanism is shown, and FIGS. 4-13 show the difference in the tightening mechanism. status.

In this embodiment, the tightening mechanism includes a drive shaft 51, a driven shaft 52, an upper clamp plate 53, a movable clamp plate 54, a lower clamp plate 55, a locking air bag 56, a transmission shaft 57, a tightening motor 58, a rotating shaft 59, and a cuff. The fixing plate 510, the cuff guard 511, the airbag cuff fixing bolt 512, and the like. The drive shaft 51 is mounted on the upper clamp plate 53, the driven shaft 52 is mounted on the movable clamp plate 54, and the lock airbag 56 is mounted between the movable clamp plate 54 and the lower clamp plate 5, and the airbag cuff is driven from the drive shaft 51 and the driven shaft 52. When the driving motor 58 passes through the transmission shaft 7, the driving shaft 51 is rotated, and when the locking air bag 56 is pressurized, the moving clamping plate 54 moves in the direction of the clamping plate 53, so that the driving shaft 51 and the driven shaft 52 clamp the airbag cuff. The drive shaft 51 drives the airbag cuff to tighten or loosen the return position or lock the measurement by friction. By controlling the air pressure of the locking air bag 56, the clamping force of the driving shaft 51 and the driven shaft 52 to the airbag cuff is adjusted, that is, the frictional force of the driving shaft 51 and the driven shaft 52 against the airbag cuff is adjusted to achieve tightening. The mechanism drives the airbag cuff to tighten or relax back or lock the measurement.

In this embodiment, a rigid mechanical connection between the pumping motor 58 and one end of the drive shaft 51 is employed. That is, the connection between the tightening motor 58 and one end of the drive shaft 51 prevents the relative movement between the tightening motor 58 and the drive shaft 51, so that the drive shaft and the tightening motor are respectively located on the rotating shaft. One side pivots about the axis of rotation. Such an arrangement of the tightening motor 58 and the drive shaft 51 is not only compact, but in particular, it is also possible to form a structure balanced with the body of the tightening mechanism by the weight of the tightening motor to further reduce the weight of the tightening mechanism for measurement accuracy. Impact.

However, the pinch motor 58 and the drive shaft 51 may also be connected in other ways. For example, FIG. 3 shows another combination of the airbag cuff, the tightening mechanism, and the tightening motor of the embodiment of the present invention. As shown in FIG. 3, the pumping motor 58 is fixed to the sleeve housing and/or the support housing, and is connected to one end of the drive shaft 51 by a flexible shaft. Compared to the structure shown in Fig. 2, the pinching motor 58 cannot pivot about the rotating shaft 59 due to the structure using the flexible shaft connection.

Cuff guards 511 are mounted on both sides of the upper jaw 53 to prevent the airbag cuff from being improperly caught in the tightening mechanism.

The airbag cuff fixing bolt 512 is mounted in the vicinity of the tightening mechanism and in the direction in which the cuff is ejected when the cuff is tightened. The rotating shaft connection is located at a distal end of the pulling mechanism from the tested person, so that the pulling mechanism can be pivoted by the rotating shaft to swing up and down.

A person skilled in the art can understand that although in the illustrated embodiment, the tightening mechanism adopts a manner of swinging up and down the axis of rotation, the tightening mechanism can also be fixed to the sleeve shell without using the method of swinging up and down around the rotating shaft. Alternatively, the manner in which the housing is supported, that is, the tightening mechanism of the present invention may be fixed to the sleeve housing or the support housing without moving.

The tightening mechanism works as follows:

Figures 4 and 10 show the initial state of the tightening mechanism when the locking airbag 56 is not inflated and the airbag cuff is in the maximum diameter state, as shown in Figure 7.

When the blood pressure measurement is required, the locking air bag 56 is inflated and applied to the appropriate pressure. At this time, the drive shaft 51 and the driven shaft 52 clamp the airbag cuff, and the airbag cuff is driven by friction, and the tightening motor 58 is rotated forward. The diameter of the airbag cuff is gradually reduced due to the twitching of the tightening mechanism.

When the airbag cuff completely wraps the measured limb, the tightening motor 58 stops rotating and enters the locked state, and the locking airbag 56 is applied to a large pressure, so that the friction between the drive shaft 51, the driven shaft 52 and the airbag cuff is sufficiently large. Without relative sliding, as shown in Figure 22. Figure 13 is a schematic illustration of the airbag cuff being pulled to a minimum diameter state.

During the relaxation and return of the airbag cuff, the locking airbag 56 is applied to the appropriate pressure, and the tightening motor 58 is rotated in the reverse direction, and the airbag cuff is moved in the direction of the relaxed returning position, and the appropriate twisting and sliding can be performed. Due to the action of the airbag cuff fixing bolt 512, the airbag cuff can be restored to the original position.

While the airbag cuff moves in the direction of the lifting, a proper torsion sliding can be performed, so that the cylindrical taper rolled by the airbag cuff in the tightened state changes with the taper of the arm of the testee, and is closely related to the arm to be tested. fit. Figure 20 is an initial state of lateral sliding of the cuff, at which time the airbag cuff is wound with the largest taper of the cylinder; Figure 21 is the intermediate state of the cuff lateral sliding, at which time the cylinder taper of the airbag cuff is somewhat Figure 22 shows the maximum lateral sliding of the cuff, at which time the airbag cuff is rolled into the smallest cylinder. By performing appropriate torsion pendulum sliding, the airbag cuff can be harmoniously matched with the arm of the subject, reducing the unidirectional stress on the arm, which is beneficial to improve the measurement accuracy of the device.

As shown in FIGS. 16 and 17, the airbag cuff of this embodiment includes an inner ring airbag segment 41, an outer ring airbag segment 42, and a drag section 43. The entire airbag cuff has a fan-shaped shape. Two airbags, i.e., a large airbag 47 and a small airbag 49, which are mounted in the airbag coupling sleeve 413 at the position of the inner ring airbag section 41 and the outer ring airbag section 42, are mounted in the airbag cuff. In Fig. 16, reference numerals 48 and 410 indicate an exemplary inflation nozzle of the airbag.

A support keel 44 is disposed on the airbag cuff, and the support keel 44 is placed in the keel joint sleeve 45, and the support keel 44 and the keel joint sleeve 45 are connected and fixed only between the inner ring airbag segment 41 and the outer ring airbag segment 42. The part can be twitched freely. The manner in which the support keel 44 is fixed is a very important technical feature of the cuff structure, which increases the freedom of movement of the cuff 44, enabling the cuff 44 to better interact with the limb being tested, reducing one direction Stress is beneficial to improve the measurement accuracy of the device.

The support keel 44 is located in the inner band airbag segment 41 of the airbag cuff, and has a width substantially equal to the width of the large air bag 47. The width of the support keel located in the outer ring segment 42 and the drag segment 43 is reduced to about 1/3 of the width of the outer ring segment. The wide support keel in the inner ring airbag segment and the narrow support keel in the outer ring airbag segment and the drag segment have an arc shape and the arc shape is the same as the airbag cuff. The wide support keel supporting the keel in the inner ring airbag section is preliminarily formed into an inwardly wound arc shape, as shown in Fig. 11, which shows a cross-sectional view of the automatic blood pressure measuring device of the embodiment of the present invention in the initial state of the cuff.

For the inner ring airbag segment 41, in the case where only one airbag is mounted, the width of the support keel 44 is substantially equal to the width of the one airbag, and in the case where two or more airbags are mounted, the support keel 44 The width of the airbag is substantially equal to the width of the airbag near the long curved side of the airbag cuff. In the illustrated embodiment, two air bags are installed. Those skilled in the art can understand that the width of the supporting keel 44 and the width of the airbag are not necessarily strictly equal. Compared with the width of the airbag, the width of the supporting keel 44 can provide a certain design margin before meeting the design purpose. , for example, than an airbag The width is slightly smaller, or the edge supporting the keel 44 is a smooth curve or the like.

The support keel 44 has the following functions: 1. The wide support keel in the inner ring airbag segment 41 is prefabricated into an inwardly wound arc shape, which can shrink the cuff tube which is wound by the airbag cuff to a smaller diameter. To meet the measurement needs of the subject with a small limb size, as shown in Fig. 13; 2. The width of the supporting keel in the outer ring segment 42 and the drag segment 43 is reduced to 1/3 of the width of the outer ring segment. Left and right, as shown in FIG. 16, its main function is that during the return of the airbag cuff to the initial state, since a corresponding space is provided between the drive shaft and the driven shaft, the width reduction portion of the support keel can make The cuff tube that is wound by the airbag cuff has the largest diameter to meet the measurement requirements of the subject with a large limb size, and the force of the drive shaft and the driven shaft can be applied to the cuff. It is not a keel, which minimizes the support of the keel and increases the unfavorable unidirectional stress. The initial state of the cuff is shown in Figure 15. Figure 16 is a schematic view showing the cuff tube diameter in an intermediate state.

At the same time, since the width of the support keel located in the outer ring segment 42 and the drag segment 43 is reduced to about 1/3 of the width of the outer ring segment, the measurement accuracy is not affected. Moreover, after the airbag cuff is wrapped on the limb of the subject, the support frame 4 here has a flat shape in a natural state, and the force generated after winding is directed outward, and the force does not act inward on the airbag, and does not Affects measurement accuracy.

The support frame 4 is located outside the airbag cuff. During the measurement process, the cuff tube diameter of the airbag cuff is also different due to the different limb sizes of the subject, and the length of the cuff and the support frame is required. In order to facilitate the winding of the cuff tube, the support keel is placed in the keel connection sleeve, and the support keel and the keel connection sleeve are only fixed and fixed between the inner ring air bag segment and the outer ring air bag segment, and the rest can be freely twitch.

In this embodiment, a double airbag is used, and when the keel connecting sleeve 45 is in the position of the inner ring airbag section 41, it overlaps with the airbag near the long curved side of the airbag cuff; when the keel connecting sleeve 45 is in the position of the outer ring airbag section and the drag section Located in the middle of the outer ring airbag section 42, it is equidistant from the long curved edge of the airbag cuff and extends all the way to the drag section 43.

As shown in FIG. 16, the airbag cuff 4 further includes a cuff fixing coupling sleeve 46, which is exemplarily attached to the position between the inner ring airbag segment 41 and the outer ring airbag segment 42 in FIG. Used for fixing and replacing the airbag cuff. A connecting member such as a screw or a pin can pass through the fixed connecting sleeve 46 to fix the fixed connecting sleeve 46 to the tightening mechanism 5. A screw or a pin or the like may be used as a component of the tightening mechanism 5, or may be attached to the airbag cuff 4 as the airbag cuff 4.

Referring again to Fig. 16 and Figs. 11-13, in order to ensure that the airbag cuff can be accurately restored to the initial state during the resetting process, the drag section fixing joint 412 is provided at the end of the drag section. In the drag segment The connecting joint 412 may include a connecting member such as a screw or a pin and a passage through which a connecting member such as a screw or a pin passes. A screw or a pin or the like may be used as a component of the tightening mechanism 5, or may be attached to the airbag cuff 4 as the airbag cuff 4. The airbag cuff fixing bolt 512 described above corresponds to the drag section fixing joint 412.

When the airbag cuff 4 is installed, the screw or pin for the cuff fixing sleeve 46 is passed through the cuff fixing sleeve 46 to be connected to the tightening mechanism 5, and additionally, for the drag section fixing joint 412. The screw or pin is connected to the take-up mechanism 5 through the drag section fixing joint 412, so that the airbag cuff 4 can be connected to the tightening mechanism 5 in the sleeve casing 2. Conversely, if the airbag cuff 4 is to be removed and replaced, the airbag cuff 4 can be removed from the sleeve by simply pulling out the screw or pin for the cuff fixing sleeve 46 and the screw or pin for dragging the segment fixing joint 412. Take out inside the outer casing 2. Therefore, the installation, removal and replacement of the airbag cuff 4 are very convenient.

The appropriate twisting and sliding state of the airbag cuff shown in Figs. 20-22 while moving in the pulling direction has been described above. Here, the following effects of the cuff of the present invention will be further described.

Because the diameter of the two ends of the limb of the subject is different, generally the diameter of the proximal end of the body is larger, and the diameter of the distal end of the body is smaller, so the shape of the entire airbag cuff is designed into a fan ring shape. In order to adapt to the different ratios of the diameters of the two ends of the limb of the subject, the width of the drag section 43 from the side of the outer ring to the end of the drag section is gradually changed from wide to narrow, and the width of the narrowest and widest portions is designed. The ratio can vary between 1/2 and 1, preferably around 2/3. As described above, the airbag cuff can be appropriately twisted and slid while being moved in the tightening direction, so that the cylindrical taper rolled by the airbag cuff in the tightened state changes depending on the taper of the limb of the subject. Closely attached to the limb being tested. The structure of the automatic blood pressure measuring device of the present invention enables the airbag cuff to perform appropriate torsion sliding, thereby contributing to an improvement in measurement accuracy.

As shown in Fig. 16 and Figs. 11-13, the inner ring airbag end beam 411 made of a rigid material is provided at the end of the inner ring airbag, and the rigid material is, for example, stainless steel. The inner ring airbag end beam 411 is for ensuring that the airbag cuff assumes a proper state when wound, which also has a positive effect on further reducing the unidirectional stress on the measured limb. For example, when the measured subject's limb size is small, or when the diameter ratio of both ends of the subject's limb is too large, the airbag cuff can be wound well due to the presence of the rigid inner ring airbag end beam 411, and the measured The limbs are properly fitted to help with accurate measurement of blood pressure.

In this embodiment, the drive shaft 51 and the driven shaft 52 are wrapped with a soft shaft 14 such as stainless steel to wrap a soft outer skin 15 such as rubber, which has good rigidity and has a good airbag cuff. Mo Rubbing force, as shown in Figures 14 and 15. From the closer end to the far end of the test subject, the outer diameter of the drive shaft gradually changes from large to small, forming a cone shape to match the fan ring shape structure of the airbag cuff. The rubber shaft is not wrapped in the middle of the driven shaft to provide free space for the airbag cuff to support the keel.

Please note that the drive shaft 51 and the driven shaft 52 are not limited to the structure in which the rigid shaft core and the flexible outer skin are combined, and other structures may be employed as long as sufficient rigidity and sufficient friction are satisfied, for example, Made entirely of rigid materials, but the coefficient of friction of the shaft surface is improved by embossing or the like. In addition, the movable space for providing the airbag cuff support keel is not limited to the structure in which the soft shaft is not wrapped in the middle portion of the driven shaft, and various structures may be adopted, for example, one of the drive shaft and the driven shaft may be adopted. A recess is formed on the drive shaft and a recessed portion is formed on the drive shaft and the driven shaft, and the support keel provides a free movable space by the cooperation of the drive shaft and the driven shaft. Moreover, please note that when the structure of the automatic blood pressure device (for example, the drag segment does not support the keel), there is no need to provide a free space for supporting the keel, and the drive shaft and / or the shape of the driven shaft is designed to provide a free space for supporting the keel.

In the above embodiment, the friction driving type grasping mechanism of the present invention cooperates with the airbag cuff of the present invention to form the automatic blood pressure measuring device of the present invention, and also has a structure capable of swinging up and down about the pivot, but The applicable range of the friction driving mechanism of the present invention is not limited thereto. Those skilled in the art can understand that the friction driving type of the present invention can also cooperate with other forms of the airbag cuff. In addition, as already explained, the tightening mechanism can also be fixed without being swingable. The structure of the positioning.

The embodiment of the automatic blood pressure measuring device of the present invention has been described above. The specific features of the automatic blood pressure measuring device of the present invention, such as shape, size and position, can be specifically designed by the functions of the features disclosed above, which are all achievable by those skilled in the art. Furthermore, the technical features disclosed above are not limited to the combination of the disclosed features and other features, and other combinations of the various technical features may be made by those skilled in the art to achieve the object of the present invention.

Claims

An automatic blood pressure measuring device comprising a support shell, a sleeve, an airbag cuff, a tightening mechanism and a tightening motor, characterized in that:

The tightening mechanism includes:

Support frame

a drive shaft mounted in the support frame on one side of the airbag cuff across the airbag cuff, and one end connected to the tightening motor;

A driven shaft is mounted in the support frame on the other side of the airbag cuff across the airbag cuff and opposite the drive shaft, the drive shaft and the driven shaft being relatively movable to clamp the airbag sleeve The belt, whereby the airbag cuff can be tightened by the rotation of the drive shaft and the airbag cuff can be moved in the relaxed return direction.
The automatic blood pressure measuring device according to claim 1, wherein:

The drive shaft is one, and the driven shaft is two, and the two driven shafts respectively form a clip for clamping the airbag cuff to the drive shaft on both sides of the drive shaft. Squeeze the area.
The automatic blood pressure measuring device according to claim 1, wherein:

The drive shaft is fixed in position in the support frame, and the driven shaft is mounted on the movable bracket and is movable relative to the drive shaft to be close to or away from the drive shaft.
The automatic blood pressure measuring device according to claim 1, wherein:

A locking airbag is mounted between the bottom wall of the support frame and the movable bracket, and the locking airbag drives the movable bracket to move, thereby forcing the driven shaft to approach or away from the drive shaft.
The automatic blood pressure measuring device according to claim 4, wherein:

The support frame includes an upper clamp plate and a lower clamp plate, and the movable bracket is a movable clamp plate, wherein the drive shaft is mounted on the upper clamp plate, and the lock airbag is installed between the movable clamp plate and the lower clamp plate.
An automatic blood pressure measuring device according to any one of claims 1 to 5, wherein:

The drive shaft is wrapped with a soft shaft to enclose the soft outer skin so as to have sufficient rigidity and sufficient friction force for the airbag cuff, and the outer diameter of the drive shaft is from the near end to the far end from the test subject. It gradually changes from large to small to form a cone shape.
An automatic blood pressure measuring device according to any one of claims 1 to 5, wherein:

The driven shaft encloses the soft outer skin with a hard shaft center, so that the rigidity of the airbag cuff is sufficient to have sufficient rigidity, and the outer circumference of the drive shaft is from the near end to the far end of the test subject. The diameter gradually changes from large to small to form a cone shape.
An automatic blood pressure measuring device according to claims 1-5, characterized in that:

The airbag cuff includes an inner ring airbag segment, an outer ring airbag segment, and a drag segment;

The airbag cuff is provided with a supporting keel, and the supporting keel is placed in the keel connecting sleeve, and the supporting keel is connected and fixed only at a position corresponding to the position between the inner ring airbag segment and the outer ring airbag segment with respect to the keel connecting sleeve. The rest can be twitched freely.
The automatic blood pressure measuring device according to claim 8, wherein:

The overall shape of the airbag cuff is in the shape of a fan ring;

The airbag cuff is provided with a supporting keel, and the supporting keel is placed in the keel connecting sleeve;

For the inner ring airbag segment, the width of the support keel is substantially equal to the width of the one airbag in the case where only one airbag is installed, and the support keel and the airbag sleeve are supported in the case where two or more airbags are installed. The width of the balloon with the long curved sides is substantially equal;

At least at a position corresponding to the drag segment, the width of the support keel is reduced to about 1/3 of the width of the outer ring segment.
The automatic blood pressure measuring device according to claim 9, wherein:

At a position corresponding to at least a portion of the outer balloon segment, the width of the support keel is also reduced to about 1/3 of the width of the outer balloon segment.
The automatic blood pressure measuring device according to claim 9, wherein:

The driven shaft has a recess corresponding to the support keel provided to the drag section so as to be able to create a space for freely supporting the support keel provided on the drag section.
The automatic blood pressure measuring device according to claim 11, wherein:

The two ends of the driven shaft are wrapped with a soft shaft to wrap the soft outer skin, so that the rigidity of the airbag cuff is sufficient and the friction is sufficient, and from the closer end to the far end of the test subject, The outer diameters of the two ends of the driven shaft gradually change from large to small to form a cone shape;

The intermediate portion of the driven shaft does not wrap the soft outer skin to form the recess.