Automatic blood pressure measuring device with open tightening mechanism

Abstract

An automatic blood pressure measuring device with an open tightening mechanism comprises a base, an arc-shaped receiving portion, a fixed airbag cuff, an active airbag cuff and a telescopic mechanism, wherein the fixed airbag cuff is fixed to the arc-shaped receiving portion by a fixed pressing plate, and the fixed airbag cuff is movable except for the part pressed by the fixed pressing plate, and the length of the fixed airbag cuff is close to the minimum arm circumference set by the automatic blood pressure measuring device; one end of the active airbag cuff is fixed to a fixed position in the base, and the other end is fixed to the front end of the telescopic mechanism, so that the active airbag cuff can extend out of the base and surround the arm of the person being measured until the other end reaches the vicinity of the part of the fixed cuff pressed by the fixed pressing plate; the airbag of the fixed airbag cuff and the airbag of the active airbag cuff are both connected to an airway tube, and the two airway tubes are combined into one through a three-way catheter. The present invention can ensure measurement accuracy, broaden the applicable population, and improve the convenience of use for the person being measured.

Description

Technical Field

[0001] The invention relates to a blood pressure measuring device, in particular to an automatic blood pressure measuring device. Background Art

[0002] Blood pressure is one of the most important basic medical parameters of the human body. Non-invasive blood pressure measurement is the most commonly used blood pressure examination method. Automatic blood pressure measurement is very popular among users because it does not require manual intervention during the measurement process. It is currently the most commonly used blood pressure measurement device. For example, in health examinations, automatic blood pressure measurement devices are basically used. Since the airbag cuff needs to be completely wrapped around the upper arm during the upper arm automatic blood pressure measurement process, the sleeve of the airbag cuff of the automatic blood pressure measurement device in the prior art is generally designed to be a closed cylindrical shape.

[0003] As one of the most commonly used and important physical examination equipment, it is necessary to further improve it to improve its performance. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic blood pressure measuring device, which can ensure the measurement accuracy, broaden the applicable population, and improve the convenience of use for the measured person.

[0005] Therefore, the present invention provides an automatic blood pressure measuring device with an open tightening mechanism, characterized in that it includes a base, an arc-shaped receiving portion, a fixed airbag cuff, an active airbag cuff, and a telescopic mechanism, wherein the arc-shaped receiving portion is arc-shaped, arranged in the base, and is a space for receiving the arm of the person being measured; the fixed airbag cuff is fixed to the arc-shaped receiving portion by a fixed pressing plate, and the fixed pressing plate is a longitudinal slat, and the fixed airbag cuff is movable except for the part pressed by the fixed pressing plate, and the length of the fixed airbag cuff is close to the minimum arm circumference set by the automatic blood pressure measuring device; one end of the active airbag cuff is fixed to a fixed position in the base, and the other end of the active airbag cuff is fixed At the front end of the telescopic mechanism, the telescopic mechanism is arranged in the base, so that when the telescopic mechanism extends out of the base, the part of the active airbag cuff contracted in the base extends out of the base and surrounds the arm of the person being measured until the other end reaches the vicinity of the part of the fixed cuff pressed by the fixed pressure plate, so that the fixed cuff can fit tightly to the arm of the person being measured; the airbag of the fixed airbag cuff and the airbag of the active airbag cuff are both provided with an inflation nozzle, the inflation nozzle of the fixed airbag cuff is connected to an air duct, the inflation nozzle of the active airbag cuff is connected to an air duct, and the air duct of the airbag of the fixed airbag cuff and the air duct of the corresponding airbag of the active airbag cuff are combined into one through a three-way catheter.

[0006] As a preferred embodiment, the telescopic mechanism includes a telescopic mechanism primary extension arm driving motor, a telescopic mechanism primary extension arm, a telescopic mechanism secondary extension arm, a telescopic mechanism secondary extension arm driving motor, a telescopic mechanism primary extension arm stroke baffle, a telescopic mechanism secondary extension arm stroke baffle, a first stroke switch, a second stroke switch, a third stroke switch, a fourth stroke switch, an active cuff airbag active end locking mechanism, and, wherein the other end of the active airbag cuff is fixed to the front end of the telescopic mechanism secondary extension arm; the telescopic mechanism primary extension arm driving motor is installed in the base, and the telescopic mechanism secondary extension arm The arm extension driving motor is installed on the first extension arm of the telescopic mechanism; a gear is installed on the shaft of the driving motor of the first extension arm of the telescopic mechanism, and the gear is meshed with the gear on the first extension arm of the telescopic mechanism to drive the first extension arm of the telescopic mechanism; a gear is installed on the shaft of the driving motor of the second extension arm of the telescopic mechanism, and the gear is meshed with the gear on the second extension arm of the telescopic mechanism to drive the second extension arm of the telescopic mechanism; when the measurement starts, the driving motor of the first extension arm of the telescopic mechanism rotates, driving the first extension arm of the telescopic mechanism to extend from the base, and the second extension arm of the telescopic mechanism moves synchronously with the first extension arm of the telescopic mechanism, and the The secondary extension arm of the telescopic mechanism pulls the active airbag cuff out from one end of the arc of the arc-shaped receiving part and moves toward the other end of the arc of the arc-shaped receiving part; when the arc-shaped telescopic mechanism primary extension arm of the arc-shaped receiving part reaches the other end of the arc and the travel baffle of the primary extension arm of the telescopic mechanism touches the second travel switch, the driving motor of the primary extension arm of the telescopic mechanism stops rotating, and the driving motor of the secondary extension arm of the telescopic mechanism starts rotating, and the secondary extension arm of the telescopic mechanism extends from the primary extension arm of the telescopic mechanism, pulling the active airbag cuff to continue to move toward the bottom of the arc; when the telescopic mechanism is extended to the second end When it reaches the bottom of the arc and the travel baffle of the secondary extension arm of the telescopic mechanism touches the third travel switch, the driving motor of the secondary extension arm of the telescopic mechanism stops rotating, the locking mechanism of the movable end of the movable cuff airbag is activated, and the movable end of the movable cuff airbag is locked; at this time, the tightening motor works, and the circumference of the closed airbag cuff circle formed by the movable airbag cuff and the fixed airbag cuff is shortened, so that the closed airbag cuff is tightly wrapped around the measured limb to measure blood pressure; after the measurement is completed, the telescopic mechanism runs in reverse, so that the active airbag cuff, the primary extension arm of the guide mechanism and the secondary extension arm of the guide mechanism are retracted into the base.

[0007] As a preferred embodiment, the first extension arm of the telescopic mechanism is in a semicircular arc shape, and a gear ring is arranged on the outer periphery of the first extension arm of the telescopic mechanism and meshes with the gear of the driving motor of the first extension arm of the telescopic mechanism; a second extension arm of the telescopic mechanism is installed on the inner side of each first extension arm of the telescopic mechanism, and a gear ring is arranged on the outer periphery of the second extension arm of the telescopic mechanism and meshes with the gear of the driving motor of the second extension arm of the telescopic mechanism.

[0008] As a preferred embodiment, the number of the telescopic mechanism's primary extension arms is two, the two telescopic mechanism's primary extension arms are parallel to each other, and are connected and fixed into an integrated symmetrical structure by a connecting rod; a telescopic mechanism secondary extension arm is installed on the inner side of each of the telescopic mechanism's primary extension arms; the shafts of the telescopic mechanism's primary extension arm driving motor and the telescopic mechanism's secondary extension arm driving motor are provided with gears at both ends to respectively mesh with the gear rings of the telescopic mechanism's primary extension arm and the telescopic mechanism's secondary extension arm.

[0009] As a preferred embodiment, the aforementioned automatic blood pressure measuring device also includes a friction tightening and locking structure installed in the base, the friction tightening and locking structure includes a driving shaft, a driven shaft, a movable splint, a fixed splint, an upper friction plate, a lower friction plate, a clamping airbag, a locking airbag, etc., the driving shaft and the driven shaft are arranged up and down, the upper friction plate and the lower friction plate are also arranged up and down, the driving shaft is located in the middle of the upper friction plate, the driven shaft is located in the middle of the lower friction plate, and the driven shaft is fixed to the movable splint; one end of the active airbag cuff is fixed at a fixed position on one side of the friction tightening and locking structure close to the friction tightening and locking structure, and the other end of the active airbag cuff passes through the middle of the driving shaft and the driven shaft; when the clamping airbag and the locking airbag are not inflated, the edge of the driving shaft is slightly lower than the friction surface of the upper friction plate, and the edge of the driven shaft is slightly higher than the friction surface of the lower friction plate, and only the driving shaft and the driven shaft are in contact with the active airbag. cuff contact; the clamping airbag is located between the fixed splint and the movable splint, and when the clamping airbag is inflated, the clamping airbag pushes the movable splint to move upward, and at the same time drives the driven shaft to move upward, causing the driving shaft and the driven shaft to be close to each other, clamping the movable airbag cuff, and at this time, if the driving shaft starts to rotate, the movable airbag cuff can be tightened and dragged under the action of friction; because it is tightened by friction, the movable airbag cuff can be twisted along with the shape of the measured limb, so that the airbag cuff can fit closely to the periphery of the measured limb; the locking airbag is located between the movable splint and the lower friction plate, and when the locking airbag is inflated, the locking airbag pushes the lower friction plate to move upward, so that the friction surface of the lower friction plate is higher than the driven shaft, and the upper friction plate and the lower friction plate are squeezed against each other, causing the movable airbag cuff clamped between the upper friction plate and the lower friction plate to be locked due to friction and cannot move, so as to perform subsequent blood pressure measurement.

[0010] As a preferred embodiment, the fixing position is located near the fixing clamp.

[0011] As a preferred embodiment, the position of the fixed pressure plate corresponds to the position of the friction tightening and locking structure in the vertical direction.

[0012] As a preferred embodiment, when the automatic blood pressure measuring device uses the oscillometric method to measure blood pressure, the fixed air bag cuff and the movable air bag cuff are both equipped with two inflation nozzles and two air bags, namely a large air bag and a small air bag. Each inflation nozzle is connected to an air bag, and each inflation nozzle is connected to an air duct. The two air ducts of the large air bag are then combined into one through a three-way catheter, and the two air ducts of the small air bag are also combined into one through a three-way catheter.

[0013] After studying the prior art, the inventor of the present application found that: due to the great individual differences among the subjects, the arm circumferences of the arms vary from top to bottom and the shapes are also different. The closed-shaped sleeve has strict restrictions on the maximum arm circumference of the subjects, which greatly limits the universality of the applicable population. Moreover, the measurement environment also varies greatly. In special cases, such as when the subject is receiving an IV drip, it is impossible for the subject to remove the IV needle and then measure the blood pressure. If the closed-shaped sleeve automatic sphygmomanometer of the prior art is used, the blood pressure measurement cannot be completed. Therefore, this closed-shaped cylinder sometimes brings great inconvenience to the user during use, and even affects the accuracy of the measurement results.

[0014] The present invention provides an automatic blood pressure measuring device with an open tightening mechanism, so that the automatic blood pressure measuring device can further ensure the measurement accuracy, broaden the applicable population, and improve the convenience of use for the measured person. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the automatic blood pressure measuring device of the present invention in a non-measuring state.

[0016] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the automatic blood pressure measuring device of the present invention, in a state where the telescopic mechanism has its arms extended into position once.

[0017] Figure 3 Schematic cross-sectional view of an embodiment of the automatic blood pressure measuring device of the present invention in which the telescopic mechanism has its secondary extension arm extended to the desired position

[0018] Figure 4 It is a cross-sectional schematic diagram of an embodiment of the automatic blood pressure measuring device of the present invention in a state where the active air bag cuff is tightened.

[0019] Figure 5 It is a three-dimensional diagram of the telescopic mechanism of the automatic blood pressure measuring device embodiment of the present invention with the primary and secondary extension arms extended into place.

[0020] Figure 6 It is a three-dimensional schematic diagram of the relative positions of the primary and secondary extension arms of the telescopic mechanism of the automatic blood pressure measuring device embodiment of the present invention.

[0021] Figure 7 It is a schematic diagram of an active air bag cuff suitable for pulse wave blood pressure measurement technology in an embodiment of the automatic blood pressure measurement device of the present invention.

[0022] Figure 8 It is a schematic diagram of a fixed air bag cuff suitable for pulse wave blood pressure measurement technology in an embodiment of the automatic blood pressure measurement device of the present invention.

[0023] Fig. 9It is a schematic diagram of the connection between a fixed air bag cuff and a movable air bag cuff airway tube of an embodiment of the automatic blood pressure measurement device of the present invention, which is applicable to the pulse wave blood pressure measurement technology.

[0024] Fig.10 It is a schematic diagram of an air bag cuff suitable for pulse wave blood pressure measurement technology in the prior art.

[0025] Fig.11 It is a schematic diagram of an active air bag cuff suitable for oscillometric blood pressure measurement technology in an embodiment of the automatic blood pressure measurement device of the present invention.

[0026] Fig.12 It is a schematic diagram of a fixed air bag cuff suitable for oscillometric blood pressure measurement technology in an embodiment of the automatic blood pressure measurement device of the present invention.

[0027] Fig.13 It is a schematic diagram of the connection between a fixed air bag cuff and a movable air bag cuff airway tube applicable to the oscillometric blood pressure measurement technology of an embodiment of the automatic blood pressure measurement device of the present invention.

[0028] Fig.14 It is a schematic diagram of an air bag cuff suitable for oscillometric blood pressure measurement technology in the prior art. DETAILED DESCRIPTION

[0029] Hereinafter, an embodiment of an automatic blood pressure measuring device having an open tightening mechanism according to the present invention will be described with reference to the accompanying drawings.

[0030] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0031] The drawings in this specification are schematic diagrams to assist in explaining the concept of the present invention and schematically represent the shapes of the various parts and their mutual relationships. Please note that in order to clearly show the structures of the various 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 represent the same or similar parts.

[0032] Please note that the words upper, lower, inner side, etc. are used in describing the scheme and implementation methods of the present invention. This is an orientation description with reference to the views and is only used to illustrate the structure of the scheme of the present invention.

[0033] See also Figure 1-6The automatic blood pressure measuring device of the embodiment of the present invention comprises a fixed airbag cuff 1, a fixed shaft 2 of the traction end of the movable airbag cuff, a driving motor 3 of the secondary extension arm of the telescopic mechanism, a primary extension arm 4 of the telescopic mechanism, an movable airbag cuff 5, a driving motor 6 of the primary extension arm of the telescopic mechanism, a secondary extension arm 7 of the telescopic mechanism, a driven shaft 8, an movable splint 9, a fixed splint 10, a driving shaft 11, an upper friction plate 12, a lower friction plate 13, a locking airbag 14, a fixed shaft 15 of the fixed end of the movable cuff airbag cuff, a clamping airbag 16, a locking mechanism 18 of the movable cuff airbag active end, a travel baffle 22 of the primary extension arm of the telescopic mechanism, a first travel switch 23, a second travel switch 24, a third travel switch 25, a fourth travel switch 26, a travel baffle 27 of the secondary extension arm of the telescopic mechanism, a base 29, a fixed pressure plate 30 of the fixed airbag cuff, and a tightening motor 31. Figure 4 Reference numeral 17 denotes a limb to be measured.

[0034] The base 29 is provided with an arc-shaped receiving portion for receiving the arm of the person being measured, which is an arc-shaped space for receiving the arm of the person being measured. Since its structure is an arc-shaped structure, which is only a part of a ring, it is open, and the arm of the person being measured can be placed from the top to the bottom of the automatic blood pressure measuring device of the present invention, instead of having to pass through a fixed sleeve and a full circle of cuffs as in the prior art. The arc shape of the arc-shaped receiving portion of the present invention is preferably a circular arc, as shown in the attached embodiment. Figure 1-6 As shown, due to the arc-shaped receiving portion, the base 29 is in an opening shape close to a semicircular arc.

[0035] The arc-shaped receiving portion of the base 29 is provided with a fixed airbag cuff 1, which is fixed to the arc of the base 29 by a fixed pressing plate 30 located near the middle of the fixed airbag cuff, and the rest of the fixed airbag cuff can move freely.

[0036] like Figure 1 , 2 As shown in , 6 and 7, the fixed airbag cuff 1 is fixed to the arc-shaped receiving portion by a fixed pressure plate 30, and the fixed pressure plate 30 is a longitudinal slat. Except for the part pressed by the fixed pressure plate 30, the rest of the fixed airbag cuff 1 is movable; and the length of the fixed airbag cuff 1 is close to the minimum arm circumference set by the automatic blood pressure measuring device of the present invention. The arm circumference is generally 17-45cm, and the automatic blood pressure measuring device can set the minimum arm circumference by itself. The length of the fixed airbag cuff 1 is close to the self-set minimum arm circumference, that is, it can be greater than or equal to, or less than or equal to, for example, the range of the length difference is ±1cm. In the automatic blood pressure measuring device, the measurement will be accurate only if the fixed airbag cuff fits tightly to the arm of the person being measured.

[0037] like Figure 1-4As shown, the fixed position of the fixed end of the fixed airbag cuff 1 is located near the fixed splint 10, the position of the fixed pressure plate 30 corresponds to the position of the friction tightening and locking structure in the vertical direction, and the front end point of the active airbag cuff 5 after being extended is located near the fixed splint 10, so as to ensure that the fixed airbag cuff 1 is fully wrapped and fits tightly to the arm 17 of the person being measured.

[0038] The active airbag cuff 5 passes through the middle of the driving shaft 11 and the driven shaft 8. The traction end of the active airbag cuff 5 is connected to the front end of the telescopic mechanism secondary extension arm 7 through the active airbag cuff traction end fixed shaft 2. The fixed end of the active airbag cuff 5 is connected to the downstream side of the tightening direction near the fixed clamp 10 through the active airbag cuff fixed end fixed shaft 15; the fixed clamp 10 is a part of the active airbag cuff tightening mechanism, and is located inside the arc of the base 29. The telescopic mechanism secondary extension arm 7 is installed inside the telescopic mechanism primary extension arm 4, and the telescopic mechanism secondary extension arm driving motor 3 is installed on the telescopic mechanism primary extension arm 4. When the telescopic mechanism secondary extension arm driving motor 3 does not rotate, the telescopic mechanism secondary extension arm 7 can follow the telescopic mechanism primary extension arm 4 to move synchronously. When the telescopic mechanism secondary extension arm 7 driving motor 3 rotates, the telescopic mechanism secondary extension arm 7 can be extended from the telescopic mechanism primary extension arm 4. A gear is installed on the shaft of the telescopic mechanism secondary extension arm driving motor 3, which meshes with the gear on the telescopic mechanism secondary extension arm 7 to drive the telescopic mechanism secondary extension arm 7.

[0039] The lower friction plate 13 is installed above the movable clamping plate 9, and the upper friction plate 12 is installed below the fixed clamping plate 10.

[0040] like Figure 1-6 The air bag cuff of the present invention shown in the figure comprises two separate parts, namely a fixed air bag cuff 1 and a movable air bag cuff 5. Figure 7-14 The structure of the airbag cuff of the present invention is described.

[0041] See first Figure 7-9 When the automatic blood pressure measuring device of the present invention uses pulse waves to measure blood pressure, the fixed airbag cuff 1 and the movable airbag cuff 5 are both equipped with two inflation nozzles and two airbags, namely a large airbag and a small airbag, and each inflation nozzle is connected to an airbag. Each inflation nozzle is connected to an air duct, and the two air ducts of the large airbag are combined into one through a three-way catheter, and the two air ducts of the small airbag are also combined into one through a three-way catheter, and then the combined two air ducts of the large airbag and the combined two air ducts of the small airbag are respectively connected to the corresponding parts of the blood pressure measuring device. For comparison, Fig.10 A schematic diagram of an air bag cuff applicable to the pulse wave blood pressure measurement technology in the prior art is shown. As shown in the figure, the air bag cuff applicable to the pulse wave blood pressure measurement technology in the prior art is only an integrated piece and only includes two inflation nozzles.

[0042] See also Figure 11-13 When the automatic blood pressure measuring device of the present invention uses the oscillometric blood pressure measuring method, the fixed airbag cuff 1 and the movable airbag cuff 5 are each provided with an inflation nozzle and an airbag, and each inflation nozzle is connected to an airbag. Each inflation nozzle is connected to an air guide tube, and the upstream and downstream airbag air guide tubes of the fixed airbag cuff 1 and the movable airbag cuff 5 are respectively combined into one through a three-way catheter, and then connected to the corresponding part of the blood pressure measuring device. For comparison, Fig.14 A schematic diagram of an air bag cuff applicable to oscillometric blood pressure measurement technology in the prior art is shown. As shown in the figure, the air bag cuff applicable to oscillometric blood pressure measurement technology in the prior art is only an integrated piece and only includes one inflation nozzle.

[0043] Return to see Figure 1-4 The embodiment of the present invention also adopts a friction tightening and locking structure installed in the base 29, which includes a driving shaft 11, a driven shaft 8, a movable clamping plate 9, a fixed clamping plate 10, an upper friction plate 12, a lower friction plate 13, a clamping airbag 16, a locking airbag 14, etc.

[0044] The driving shaft 11 and the driven shaft 8 are arranged up and down, and the upper friction plate 12 and the lower friction plate 13 are also arranged up and down. The driving shaft 11 is located in the middle of the upper friction plate 12, and the driven shaft 8 is located in the middle of the lower friction plate 13. The driven shaft 8 is fixed on the movable clamping plate 9. When the clamping airbag 16 and the locking airbag 14 are not inflated, the edge of the driving shaft 11 is slightly lower than the friction surface of the upper friction plate 12, and the edge of the driven shaft 8 is slightly higher than the friction surface of the lower friction plate 13. Since the active airbag cuff 5 passes through the middle of the driving shaft 11 and the driven shaft 8, in this state, only the driving shaft 11 and the driven shaft 8 are in contact with the active airbag cuff 5. The clamping airbag 16 is located between the fixed splint 10 and the movable splint 9. When the clamping airbag 16 is inflated, the clamping airbag 16 pushes the movable splint 9 to move upward, and at the same time drives the driven shaft 8 to move upward, causing the driving shaft 11 and the driven shaft 8 to be close to each other, clamping the movable airbag cuff 5. At this time, if the driving shaft 11 starts to rotate, the movable airbag cuff 5 can be tightened and dragged under the action of friction. Because it is tightened by friction, the movable airbag cuff 5 can twist with the shape of the measured limb, so that the airbag cuff can fit closely to the periphery of the measured limb, providing a prerequisite for accurate blood pressure measurement. The locking airbag 14 is located between the movable splint 9 and the lower friction plate 13. When the locking airbag 14 is inflated, the locking airbag 14 pushes the lower friction plate 13 to move upward, so that the friction surface of the lower friction plate 13 is higher than the driven shaft 8. The upper and lower friction plates are squeezed against each other, causing the movable airbag cuff 5 sandwiched between the upper and lower friction plates to be locked due to the huge friction force and cannot move, so as to facilitate subsequent blood pressure measurement.

[0045] Next, see Figure 1-6In the non-measuring state, the active airbag cuff 5, the telescopic mechanism primary extension arm 4 and the telescopic mechanism secondary extension arm 7 are retracted and hidden in the base 29.

[0046] The telescopic mechanism once-extending arm driving motor 6 is installed in the base 29 , and a gear is installed on the shaft of the telescopic mechanism once-extending arm driving motor 6 , which meshes with the gear on the telescopic mechanism once-extending arm 4 to drive the telescopic mechanism once-extending arm 4 .

[0047] At the beginning of the measurement, the telescopic mechanism primary extension arm driving motor 6 rotates, driving the telescopic mechanism primary extension arm 4 to extend from the base 29. At this time, the telescopic mechanism secondary extension arm driving motor 3 does not rotate, and the telescopic mechanism secondary extension arm 7 moves synchronously with the telescopic mechanism primary extension arm 4. The telescopic mechanism secondary extension arm 7 passes through the active airbag cuff traction end fixed shaft 2, and pulls the active airbag cuff 5 to extend from one end of the arc of the base 29 and move to the other end of the arc of the base 29. When the telescopic mechanism primary extension arm 4 reaches the other end of the arc of the base 29, and the travel baffle 22 of the telescopic mechanism primary extension arm 4 touches the second travel switch 24, the telescopic mechanism primary extension arm driving motor 6 stops rotating, and the telescopic mechanism secondary extension arm driving motor 3 starts rotating, and the telescopic mechanism secondary extension arm 7 extends from the telescopic mechanism primary extension arm 4, and pulls the active airbag cuff 5 to continue to move to the bottom of the arc of the base 29. When the secondary extension arm 7 of the telescopic mechanism reaches the bottom of the arc of the base 29 and the secondary extension arm travel baffle 27 of the telescopic mechanism touches the third travel switch 25, the secondary extension arm driving motor 3 of the telescopic mechanism stops rotating, and the movable end locking mechanism 18 of the movable cuff airbag is actuated, and the movable end of the movable cuff airbag is locked on the downstream side of the tightening direction of the movable airbag cuff dragging mechanism, close to the fixed airbag cuff fixed pressure plate 30.

[0048] At this time, the clamping airbag 16 is inflated, the driving shaft 11 and the driven shaft 8 clamp the active airbag cuff 5, and the tightening motor 31 works, driving the driving shaft 11, dragging the active airbag cuff 5 to move in the tightening direction, so that the circumference of the closed airbag cuff circle formed by the active airbag cuff 5 and the fixed airbag cuff 1 is shortened, so that the closed airbag cuff is tightly wrapped around the measured limb 17; the locking airbag 14 is inflated, pushing the active splint 9, and the active splint 9 pushes the lower friction plate 13 to move upward, and clamps with the upper friction plate 12 installed under the fixed splint 10, locking the active airbag cuff 5 so that it cannot move, and then the clamping airbag 16 is deflated; at this time, the fixed airbag cuff 11 and the active airbag cuff 5 are inflated to measure blood pressure.

[0049] After the measurement is completed, the movable airbag cuff 5 and the fixed airbag cuff 1 are deflated, the locking airbag 14 is deflated, the clamping airbag 16 is inflated, and the locking mechanism 18 of the movable end of the movable cuff airbag is unlocked.

[0050] The telescopic mechanism secondary extension arm driving motor 3 starts to rotate in the reverse direction, driving the telescopic mechanism secondary extension arm 7 to gradually retract into the telescopic mechanism primary extension arm 4, and through the active airbag cuff traction end fixed shaft 2, the active airbag cuff 5 is pulled away from the bottom of the arc of the base 29 and gradually retracted. When the telescopic mechanism secondary extension arm stroke baffle 27 touches the fourth stroke switch 26, the telescopic mechanism secondary extension arm driving motor 3 stops rotating, and at this time, the telescopic mechanism primary extension arm driving motor 6 starts to rotate in the reverse direction, driving the telescopic mechanism primary extension arm 4 to gradually retract into the base 29. In this process, the telescopic mechanism secondary extension arm driving motor 3 does not rotate, and the telescopic mechanism secondary extension arm 7 moves synchronously with the telescopic mechanism primary extension arm 4, and through the active airbag cuff traction end fixed shaft 2, the active airbag cuff 5 is pulled gradually back into the base 29. When the telescopic mechanism primary extension arm stroke baffle 22 touches the first stroke switch 23, the telescopic mechanism primary extension arm driving motor 6 stops rotating, and the telescopic mechanism primary extension arm 4 and the telescopic mechanism secondary extension arm 7 are completely retracted into the base 29.

[0051] During the retraction process of the first extension arm 4 and the second extension arm 7 of the telescopic mechanism, the clamping airbag 16 is inflated, the driving shaft 11 and the driven shaft 8 clamp the active airbag cuff 5, and the tightening motor 31 works to drive the driving shaft 11 and drag the active airbag cuff 5 to move in the tightening direction, so that the active airbag cuff 5 and the first extension arm 4 and the second extension arm 7 of the telescopic mechanism are synchronously retracted to the base 29.

[0052] After the retraction is completed, the clamping airbag 16 is deflated and the measurement is completed.

[0053] In this embodiment, the telescopic mechanism primary extension arm 4 is basically semicircular, and a gear ring is arranged on the outer periphery of the telescopic mechanism primary extension arm to mesh with the gear of the telescopic mechanism primary extension arm driving motor 6. A telescopic mechanism secondary extension arm 7 is installed on the inner side of each telescopic mechanism primary extension arm, and a gear ring is arranged on the outer periphery of the telescopic mechanism secondary extension arm 7 to mesh with the gear of the telescopic mechanism secondary extension arm driving motor 3.

[0054] like Figure 1-6 As shown, there are two telescopic mechanism primary extension arms 4, which are parallel to each other and connected and fixed into an integrated symmetrical structure by a connecting rod. A telescopic mechanism secondary extension arm 7 is installed on the inner side 4 of each telescopic mechanism primary extension arm. The shafts of the telescopic mechanism primary extension arm driving motor 6 and the telescopic mechanism secondary extension arm driving motor 3 are both equipped with gears at both ends, which are respectively meshed with the gear rings of the telescopic mechanism primary extension arm 4 and the telescopic mechanism secondary extension arm 3.

[0055] It should be emphasized that the device operation of this embodiment adopts a structure of four travel switches for control. The advantage of this structure is that the device operation is highly secure and safe. In actual products, the operation of the device can also be controlled by combining the current signal method or the program direct operation method. If only the control structure of the current signal method or the program direct operation method is adopted, the security may not be high enough, which is not conducive to the commercialization of the product.

[0056] Please note that the above embodiments are only used to illustrate the concept of the present invention, and do not mean that the present invention is limited to the above structures. For example, the telescopic mechanism can be extended once without being a symmetrical double-arm structure, and can also be a single-arm structure, that is, only one telescopic mechanism can be extended once, and the driving motor only needs to install one gear on the shaft. For another example, the angle of the arc and the shape of the telescopic mechanism can be changed according to actual needs.

[0057] The above description of the embodiments of the automatic blood pressure measuring device of the present invention is intended to explain the spirit of the present invention. Please note that those skilled in the art can modify and combine the features of the above embodiments without departing from the spirit of the present invention, and therefore, the present invention is not limited to the above embodiments. The specific features of the automatic blood pressure measuring device of the present invention, such as shape, size and position, can be specifically designed based on the effects of the above disclosed features, and these designs are all achievable by those skilled in the art.

Claims

1. An automatic blood pressure measuring device with an open tightening mechanism, characterized in that: It includes a base, an arc-shaped receiving portion, a fixed airbag cuff, a movable airbag cuff, a tightening motor and a telescopic mechanism, wherein: The arc-shaped receiving portion is arc-shaped and is arranged in the base, and is a space for receiving the arm of the person being measured; The fixed airbag cuff is fixed to the arc-shaped receiving portion by a fixed pressing plate, the fixed pressing plate is a longitudinal strip, and the fixed airbag cuff is movable except for the part pressed by the fixed pressing plate, and the length of the fixed airbag cuff is close to the minimum arm circumference set by the automatic blood pressure measuring device; One end of the active airbag cuff is fixed to a fixed position in the base, and the other end of the active airbag cuff is fixed to the front end of the telescopic mechanism, and the telescopic mechanism is arranged in the base, so that when the telescopic mechanism extends out of the base, the part of the active airbag cuff contracted in the base extends out of the base and surrounds the arm of the person being measured, until the other end reaches the vicinity of the part of the fixed airbag cuff pressed by the fixed pressure plate, so that the fixed airbag cuff can fit closely to the arm of the person being measured; The airbag of the fixed airbag cuff and the airbag of the movable airbag cuff are both provided with an inflation nozzle, and the inflation nozzle of the fixed airbag cuff is connected to an air guide tube, and the inflation nozzle of the movable airbag cuff is connected to an air guide tube, and the air guide tube of the airbag of the fixed airbag cuff and the air guide tube of the corresponding airbag of the movable airbag cuff are combined into one through a three-way catheter. Wherein, the telescopic mechanism includes a telescopic mechanism primary extension arm, a telescopic mechanism primary extension arm driving motor, a telescopic mechanism secondary extension arm, a telescopic mechanism secondary extension arm driving motor, a telescopic mechanism primary extension arm travel baffle, a telescopic mechanism secondary extension arm travel baffle, a first travel switch, a second travel switch, a third travel switch, a fourth travel switch, a movable cuff airbag movable end locking mechanism, and, wherein, The other end of the active air bag cuff is fixed to the front end of the secondary extension arm of the telescopic mechanism; The driving motor of the primary extension arm of the telescopic mechanism is installed in the base, and the driving motor of the secondary extension arm of the telescopic mechanism is installed on the primary extension arm of the telescopic mechanism; A gear is installed on the shaft of the driving motor of the telescopic mechanism's primary extension arm, and the gear meshes with the gear on the telescopic mechanism's primary extension arm to drive the telescopic mechanism's primary extension arm; The telescopic mechanism secondary extension arm drive motor shaft is mounted with a gear, the gear and the telescopic mechanism secondary extension arm gear meshing to drive the telescopic mechanism secondary extension arm; At the beginning of measurement, the driving motor of the first extension arm of the telescopic mechanism rotates, driving the first extension arm of the telescopic mechanism to extend from the base, and the second extension arm of the telescopic mechanism moves synchronously with the first extension arm of the telescopic mechanism, and the second extension arm of the telescopic mechanism pulls the active airbag cuff to extend from one end of the arc of the arc-shaped receiving part and move toward the other end of the arc of the arc-shaped receiving part; When the first extension arm of the arc-shaped telescopic mechanism of the arc-shaped receiving portion reaches the other end of the arc and the travel baffle of the first extension arm of the telescopic mechanism touches the second travel switch, the driving motor of the first extension arm of the telescopic mechanism stops rotating, and the driving motor of the second extension arm of the telescopic mechanism starts rotating, and the second extension arm of the telescopic mechanism extends from the first extension arm of the telescopic mechanism, pulling the active airbag cuff to continue to move toward the bottom of the arc; When the telescopic mechanism is extended for the second time to reach the bottom of the arc, and the travel baffle of the telescopic mechanism's second extension arm touches the third travel switch, the telescopic mechanism's second extension arm driving motor stops rotating, the movable end locking mechanism of the movable cuff airbag is actuated, and the movable end of the movable cuff airbag is locked; At this time, the tightening motor works, and the circumference of the closed airbag cuff formed by the active airbag cuff and the fixed airbag cuff is shortened, so that the closed airbag cuff is tightly wrapped around the measured limb to measure blood pressure; After the measurement is completed, the telescopic mechanism operates in reverse, so that the active airbag cuff and the telescopic mechanism's first extension arm and the telescopic mechanism's second extension arm retract into the base, and The automatic blood pressure measuring device also includes a friction tightening and locking structure installed in the base, the friction tightening and locking structure includes a driving shaft, a driven shaft, a movable clamping plate, a fixed clamping plate, an upper friction plate, a lower friction plate, a clamping airbag, and a locking airbag, the driving shaft and the driven shaft are arranged up and down, the upper friction plate and the lower friction plate are also arranged up and down, the driving shaft is located in the middle of the upper friction plate, the driven shaft is located in the middle of the lower friction plate, and the driven shaft is fixed to the movable clamping plate; The one end of the active air bag cuff is fixed at a fixed position on one side of the friction tightening and locking structure close to the friction tightening and locking structure, and the other end of the active air bag cuff passes through the middle of the driving shaft and the driven shaft; When the clamping airbag and the locking airbag are not inflated, the edge of the driving shaft is slightly lower than the friction surface of the upper friction plate, and the edge of the driven shaft is slightly higher than the friction surface of the lower friction plate, and only the driving shaft and the driven shaft are in contact with the active airbag cuff; The clamping airbag is located between the fixed splint and the movable splint. When the clamping airbag is inflated, the clamping airbag pushes the movable splint to move upward, and at the same time drives the driven shaft to move upward, causing the driving shaft and the driven shaft to be close to each other, clamping the movable airbag cuff. At this time, if the driving shaft starts to rotate, the movable airbag cuff can be tightened and dragged under the action of friction. Since it is tightened by friction, the movable airbag cuff can be twisted along with the shape of the limb being measured, so that the airbag cuff can fit closely to the periphery of the limb being measured. The locking airbag is located between the movable splint and the lower friction plate. When the locking airbag is inflated, the locking airbag pushes the lower friction plate to move upward, so that the friction surface of the lower friction plate is higher than the driven shaft. The upper friction plate and the lower friction plate are squeezed against each other, causing the movable airbag cuff sandwiched between the upper friction plate and the lower friction plate to be locked due to friction and unable to move, so as to facilitate subsequent blood pressure measurement.

2. The automatic blood pressure measuring device according to claim 1, characterized in that: The telescopic mechanism's one-time extension arm is semicircular in shape, and a gear ring meshing with the gear of the telescopic mechanism's one-time extension arm driving motor is provided on the outer periphery of the telescopic mechanism's one-time extension arm; A secondary extension arm of the telescopic mechanism is installed inside each primary extension arm of the telescopic mechanism, and a gear ring meshing with a gear of a driving motor of the secondary extension arm of the telescopic mechanism is arranged on the outer periphery of the secondary extension arm of the telescopic mechanism.

3. The automatic blood pressure measuring device according to claim 2, characterized in that: The number of arms that can be extended at one time by the telescopic mechanism is two, and the two arms that can be extended at one time by the telescopic mechanism are parallel to each other and connected and fixed into an integrated symmetrical structure by a connecting rod; A secondary extension arm of the telescopic mechanism is installed inside each primary extension arm of the telescopic mechanism; The shafts of the telescopic mechanism primary extension arm driving motor and the telescopic mechanism secondary extension arm driving motor are both equipped with gears at both ends to respectively mesh with the gear rings of the telescopic mechanism primary extension arm and the telescopic mechanism secondary extension arm.

4. The automatic blood pressure measuring device according to claim 1, characterized in that: The fixing position is located near the fixing clamp.

5. The automatic blood pressure measuring device according to claim 1, characterized in that: The position of the fixed pressure plate corresponds to the position of the friction tightening and locking structure in the vertical direction.

6. The automatic blood pressure measuring device according to any one of claims 1 to 5, characterized in that: When the automatic blood pressure measuring device uses the oscillometric method to measure blood pressure, the fixed airbag cuff and the movable airbag cuff are both equipped with two inflation nozzles and two airbags, namely a large airbag and a small airbag. Each inflation nozzle is connected to an airbag, and each inflation nozzle is connected to an air duct. The two air ducts of the large airbag are then combined into one through a three-way catheter, and the two air ducts of the small airbag are also combined into one through a three-way catheter.

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