Device for testing flux of airtight core of sphygmomanometer

Abstract

The invention discloses a sphygmomanometer airtight core flux testing device, and relates to the technical field of airtight core detection. Comprising a base and a protective shell, a material base is arranged at the top of the base and used for placing a cylindrical airtight core in an axis perpendicular state, and a control part is arranged over the material base in a suspended mode through a lifting control assembly; the regulation and control part comprises a suspension plate and a flat-line-shaped cutter matched with a groove in the top of the airtight core copper rotary knob, the flat-line-shaped cutter is driven to rotate to control the airtight core copper rotary knob, and opening and closing of an airtight core gas channel are achieved. Automatic lifting, pressing and fixing of the regulation and control part are achieved through the lifting control assembly, automatic adjustment of the rotary knob is achieved through the driving part, automatic flux detection, data comparison and working condition switching are completed in cooperation with electric control integration and the gas flowmeter, manual intervention is not needed in the whole process, subjective errors of manual operation are avoided, and the working efficiency is improved. And the detection efficiency is greatly improved, the batch detection requirement is met, and the labor cost is remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of airtight core technology, specifically to a blood pressure monitor airtight core flux testing device. Background Technology

[0002] The gas flow meter's core component is cylindrical, with a copper knob in the center. Turning the knob precisely controls the gas flow, and the accuracy of this control directly affects the meter's measurement accuracy. Currently, the gas flow of the gas flow meter's core is mostly tested manually. This involves fixing the core in place, manually adjusting the knob's opening, and then testing the flow through a ventilation device.

[0003] However, manual testing has many drawbacks: First, it is difficult to ensure the sealing effect when fixing the airtight core, and the test results are prone to deviation due to gas leakage; second, it is difficult to accurately control the opening degree when manually turning the knob, and it is difficult to maintain the stability of the knob during the rotation process, which affects the repeatability of throughput testing; third, multiple people need to work together during the testing process, which is inefficient and has high labor costs.

[0004] Therefore, there is an urgent need to design a blood pressure monitor air tightness core flux testing device with good sealing effect, precise adjustment and a high degree of automation to solve the problems existing in the current technology. Summary of the Invention

[0005] The purpose of this invention is to provide a blood pressure monitor airtight core flux testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a blood pressure monitor airtight core flux testing device, comprising a base and a protective shell, a material holder on the top of the base, the material holder being used to place a cylindrical airtight core in a vertical position along its axis, and an adjustment control device being suspended directly above the material holder via a lifting control component;

[0007] The control panel includes a suspension plate and a flat-headed knife that matches the groove on the top of the copper knob of the airtight core. The flat-headed knife rotates under the drive to control the copper knob of the airtight core, thereby opening and closing the gas channel of the airtight core.

[0008] The control panel also features a stabilizing structure to ensure the stability of the flat-head cutter's rotation and to accommodate the rotation of the knob screw connection;

[0009] The lifting control component is used to drive the adjustment control to move up and down to approach and press the airtight core. The material seat, through its own structure, works with the airtight core to achieve sealing and ventilation, thereby completing the flow rate detection.

[0010] Furthermore, the protective shell contains an integrated electronic control unit, and the base plate integrates control buttons and a panel. The integrated electronic control unit is electrically connected to the control buttons and panel to enable device operation.

[0011] Further, the lifting control assembly includes several vertical rods, with a top plate fixed to the top of each vertical rod. The adjustment mechanism includes a suspension plate, with several sleeves installed on the suspension plate. The suspension plate is slidably mounted on the surface of the vertical rods via the sleeves and moves along the length of the vertical rods.

[0012] Further, a threaded sleeve is installed at the suspension plate, and the threaded sleeve is fixedly installed at the suspension plate. A drive shaft is rotatably installed in the middle of the top plate. The surface of the drive shaft is threaded. The top of the base is a bottom plate, and the vertical rods are all installed on the bottom plate. At the same time, a shaft wheel one and a shaft wheel two are respectively provided below the bottom plate. The shaft wheel one and the shaft wheel two are connected by a transmission belt. The installation position of the drive source is reserved on the bottom plate.

[0013] Further, the material holder includes a sleeve and a top plate. Connecting columns are provided around the material holder, and a seat hole is opened in the middle of the top plate. On the side of the top of the sleeve facing the top plate, near the widening hole, the diameter of the widening hole is larger than the maximum diameter of the airtight core.

[0014] Further, a rubber ring 1 and a rubber ring 2 are respectively adhered to the inner wall of the seat hole. The inner wall diameters of the rubber ring 1 and the rubber ring 2 are adapted to the diameter of the airtight core, or the inner wall diameter formed by the rubber ring 1 and the rubber ring 2 is smaller than the diameter of the airtight core. The airtight core and the diameter of the seat hole form a sealing state. The rubber ring 2 extends upward to the outside of the seat hole and is turned outward. A gasket is also provided at the bottom step of the widened hole. The gasket contacts the plane of the step of the airtight core to avoid gas leakage.

[0015] Furthermore, the bottom of the sleeve is provided with a hole extending through to the widening hole. The diameter of the hole is smaller than that of the widening hole. Connecting rods are installed around the material seat. The connecting rods are used to install the material seat on the base plate. The base plate is provided with connecting holes at the corresponding connecting columns. Pipelines are used to pass through the connecting holes for pumping air into the material seat.

[0016] Furthermore, the adjustment control also includes several support rods fixed around the suspension plate. A connecting plate is fixed to the bottom of the support rod, and a bottom plate is fixedly connected to the bottom of the connecting plate. The support rods are installed on the suspension plate through fixing sleeves, and the height of the support rods is adjusted through the fixing sleeves.

[0017] Further, the stabilizing structure includes a brake shaft sleeve, with a bottom sleeve matching the brake shaft sleeve below it. When the brake shaft sleeve rotates, the bottom sleeve rotates synchronously, creating a certain space between the brake shaft sleeve and the bottom sleeve. A sleeve shaft is fixedly installed in the middle of the bottom sleeve, with a sliding hole in the middle. The sliding hole is an irregularly shaped hole or a non-circular hole. The top of the flat-head cutter is adapted to the inner wall of the sliding hole. That is, the flat-head cutter moves up and down along the sliding hole and can rotate with the sleeve shaft. A stop plate is provided inside the brake shaft sleeve and the bottom sleeve, with a spring fixed at the bottom of the stop plate. The other end of the spring is connected and fixed to the flat-head cutter.

[0018] Further, the bottom of the sleeve shaft is provided with a side hole, and the top of the connecting plate is also provided with a hole. An airtight bushing is placed in the hole. A flat-headed knife is inserted into the airtight bushing and rotates on the inner wall of the airtight bushing. A bottom plate is fixed at the bottom of the connecting plate. A recess is provided in the center below the bottom plate. The recess matches the top contour of the airtight core. The recess is connected to the airtight bushing. The diameter of the connection is larger than the diameter of the copper knob.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This blood pressure monitor airtight core flux testing device achieves automatic lifting and pressing of the adjustment control via a lifting control component, and automatic adjustment of the knob via a drive component. In conjunction with the electronic control integration and gas flow meter, it completes automated flux detection, data comparison, and operating condition switching. The entire process requires no manual intervention, which avoids the subjective errors of manual operation, greatly improves testing efficiency, adapts to batch testing needs, and significantly reduces labor costs.

[0021] Meanwhile, the precise matching between the flat-head cutter and the knob groove, combined with the transmission of the irregular sliding hole of the sleeve shaft and the guiding effect of the airtight bushing, ensures the coaxiality and stability during the knob adjustment process; the spring structure can adapt to the displacement changes of the knob screw rotation, ensuring that the flat-head cutter is always in contact with the knob, avoiding adjustment interruption or deviation.

[0022] By forming a tight seal between rubber ring one and rubber ring two and the airtight core, combined with the gasket at the bottom of the widened hole and the recessed pressing seal of the bottom plate of the adjustment control, a multi-layer sealing structure is constructed, effectively preventing gas leakage and significantly improving detection accuracy. The flanged design of rubber ring two also facilitates quick positioning and insertion of the airtight core, improving feeding efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the base of the present invention;

[0026] Figure 4 This is a cross-sectional view of the present invention.

[0027] Figure 5 For the present invention Figure 4 Enlarged structural diagram of section A;

[0028] Figure 6 For the present invention Figure 4 Enlarged structural diagram of section B;

[0029] Figure 7 This is an enlarged structural diagram of the seat hole and the widened hole of the present invention.

[0030] In the diagram: 1. Protective shell; 2. Base; 201. Base plate; 202. Control button; 203. Panel; 204. Connecting hole; 3. Electrical control integration; 4. Material holder; 401. Top plate; 402. Sleeve; 403. Connecting column; 404. Connecting rod; 405. Seat hole; 406. Rubber ring one; 407. Rubber ring two; 408. Widening hole; 409. Washer; 5. Adjustment control; 501. Suspension plate; 502. Support 503. Rod; 504. Fixing sleeve; 505. Brake shaft insert sleeve; 506. Bottom insert sleeve; 507. Abutment; 508. Sliding hole; 509. Spring; 510. Side hole; 511. Connecting plate; 512. Bottom plate; 513. Airtight bushing; 514. Flat I-head cutter; 6. Top plate; 7. Sleeve sleeve; 701. Vertical rod; 8. Drive shaft; 9. Shaft wheel one; 10. Shaft wheel two; 11. Transmission belt; 12. Threaded sleeve. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1As shown, the present invention provides a technical solution: a blood pressure monitor airtight core flow rate testing device, including a base 2 and a protective shell 1. A material seat 4 is provided on the base 2. An adjustment control 5 is provided above the material seat 4. This device is used to test the flow rate of the blood pressure monitor airtight core. The airtight core is cylindrical and has a copper knob in the middle. By rotating the knob, the flow rate of gas through the airtight core can be controlled. During use, the airtight core is placed on the base 2. During this process, the axis of the airtight core is in a vertical state. By controlling the adjustment control 5 to approach and press the airtight core, and during the pressing of the airtight core, the copper knob of the airtight core is rotated through the internal structure of the adjustment control 5. During the rotation of the airtight core, the flow rate of the airtight core is detected by passing air into the airtight core and detecting the flow rate of the gas after it passes through.

[0033] like Figure 2 and Figure 3 As shown, to achieve the above objective, it is necessary to understand that the adjustment control 5 is suspended directly above the material base 4 via a lifting control component. The lifting control component includes several vertical rods 701. A top plate 6 is fixed to the top of the vertical rods 701. The adjustment control 5 includes a suspension plate 501, on which several sleeves 7 are installed. The suspension plate 501 is slidably installed on the surface of the vertical rods 701 via the sleeves 7 and moves along the length of the vertical rods 701.

[0034] Additionally, a threaded sleeve 12 is installed at the suspension plate 501, and the threaded sleeve 12 is fixedly installed at the suspension plate 501. A drive shaft 8 is rotatably installed in the middle of the top plate 6. The surface of the drive shaft 8 is threaded. By rotating the drive shaft 8, the threaded sleeve 12 engages with the thread on the surface of the drive shaft 8. The vertical rods 701 serve as limits, allowing the suspension plate 501 to move up and down with the vertical rods 701 as limits. It should be noted that the top of the base 2 is the base plate 201, and the vertical rods 701 are all installed on the base plate 201. At the same time, a first axle wheel 9 and a second axle wheel 10 are respectively provided below the base plate 201. The first axle wheel 9 and the second axle wheel 10 are connected by a transmission belt 11. The base plate 201 has a reserved installation position for a drive source. This structure drives the first axle wheel 9 through a drive source, which can be a motor.

[0035] like Figure 4 and Figure 6 and Figure 7As shown, to achieve flow rate testing of the airtight core, the material holder 4 includes a sleeve 402 and a top plate 401. Connecting posts 403 are provided around the material holder 4. A seat hole 405 is opened in the middle of the top plate 401. On the side of the top of the sleeve 402 facing the top plate 401, near the widened hole 408, the diameter of the widened hole 408 is larger than the maximum diameter of the airtight core. Rubber ring 1 406 and rubber ring 2 407 are respectively glued to the inner wall of the seat hole 405. The inner wall diameters of rubber ring 1 406 and rubber ring 2 407 are... The diameter of the airtight core is matched with the diameter of the rubber ring 406 and the inner wall diameter formed by the rubber ring 407 are slightly smaller than the diameter of the airtight core. The airtight core and the diameter of the seat hole 405 form a sealing state. The rubber ring 407 extends upward to the outside of the seat hole 405 and is turned outward. That is to say, the top diameter of the rubber ring 407 is larger than the inner wall diameter of the seat hole 405, which facilitates the insertion of the airtight core. A washer 409 is also provided at the bottom step of the widened hole 408. The washer 409 contacts the plane of the step of the airtight core to prevent gas leakage.

[0036] A hole is also provided at the bottom of the sleeve 402, extending through to the widening hole 408. The diameter of this hole is smaller than that of the widening hole 408. It is used to connect the pump pipe to the airtight core and to detect the flow rate through the airtight core.

[0037] like Figure 6 As shown, to ensure the smooth implementation of the above embodiments, it is necessary to understand that connecting rods 404 are installed around the sleeve 402. The connecting rods 404 are used to install the material seat 4 on the base plate 201, and the base plate 201 has a connecting hole 204 at the corresponding connecting column 403. The connecting hole 204 is used for passing a pipeline to pump air to the material seat 4. It is also necessary to understand that the side of the connecting column 403 is also reserved with a mounting hole for installing parts such as a gas flow meter. The flow rate can be monitored by comparing the total amount of gas pumped out with the flow rate detected by the gas flow meter.

[0038] like Figure 4 and Figure 5 As shown, to ensure the smooth implementation of the above embodiments, it is necessary to understand that the control device 5 includes a flat-head blade 514, which matches the groove on the top of the copper knob of the airtight core. When the flat-head blade 514 rotates, it can control the rotation of the copper knob of the airtight core, thereby opening and closing the gas channel of the airtight core.

[0039] To ensure the flat-head cutter 514 can mate with the material holder 4, it's also necessary to understand that the adjustment control 5 includes several support rods 502 fixed around the suspension plate 501. A connecting plate 511 is fixed to the bottom of each support rod 502, and a bottom plate 512 is fixedly connected to the bottom of the connecting plate 511. The support rods 502 are mounted on the suspension plate 501 via fixing sleeves 503, and their height can be adjusted using these sleeves. It's understood that, to improve stability, the fixing sleeves 503 can be replaced with nuts, clamps, or welded fixing. A stabilizing structure is also provided below the suspension plate 501, including a brake shaft sleeve 504. Below the brake shaft sleeve 504 is a matching bottom sleeve 505. When the brake shaft sleeve 504 rotates, the bottom sleeve 505 rotates synchronously, creating a certain space between the brake shaft sleeve 504 and the bottom sleeve 505. A sleeve shaft 507 is fixedly installed in the middle of the sleeve 505. The middle of the sleeve shaft 507 is a sliding hole 508, which is an irregularly shaped hole or a non-circular hole. The top of the flat-head cutter 514 is adapted to the inner wall of the sliding hole 508. That is to say, the flat-head cutter 514 can move up and down along the sliding hole 508 and can rotate with the sleeve shaft 507. A stop plate 506 is provided inside the brake shaft sleeve 504 and the bottom sleeve 505. A spring 509 is fixed at the bottom of 506. The other end of the spring 509 is connected and fixed to the flat-head blade 514. A position is reserved on the top of the suspension plate 501 to install a drive component. The drive component can be a motor, which is used to drive the brake shaft sleeve 504 and control the flat-head blade 514 to rotate. Since the copper knob is screwed to the airtight core, when the flat-head blade 514 rotates, the extension and contraction variables will be controlled by the spring 509 to adapt to the rotation of the copper knob.

[0040] Because the flat flathead cutter 514 is thicker at the top and thinner at the bottom, the thinner part of the flat flathead cutter 514 is prone to slight deformation during use. Therefore, a side hole 510 is provided at the bottom of the sleeve shaft 507. The side hole 510 makes it convenient to adjust the flat flathead cutter 514 using tools such as screwdrivers.

[0041] like Figure 5As shown, to ensure the smooth implementation of the above embodiments, it is also necessary to know that the top of the connecting plate 511 is also provided with a hole, and an airtight bushing 513 is placed in the hole. The flat-headed knife 514 is inserted into the airtight bushing 513 and rotates on the inner wall of the airtight bushing 513. Since the flat-headed knife 514 is thicker at the top and thinner at the bottom, and slides in the sliding hole 508, the setting of the airtight bushing 513 can improve the stability of the flat-headed knife 514 during rotation. A bottom plate 512 is fixed at the bottom of the connecting plate 511. A recess is provided in the center of the bottom of the bottom plate 512. The recess matches the top contour of the airtight core. The recess is connected to the airtight bushing 513. The diameter of the connection is larger than the diameter of the copper knob. When the adjustment control 5 is pressed down, the recess presses down on the airtight core to keep the airtight core stable. Then, when the flat-headed knife 514 is turned to tighten the copper knob, it can maintain stability.

[0042] Looking back Figure 1 and Figure 2 An electronic control unit 3 is installed inside the protective shell 1, and a control button 202 and a panel 203 are integrated on the base plate 201 for controlling the air tightness core flux testing device of the blood pressure monitor.

[0043] Working principle: First, the airtight core is placed vertically on the material seat 4 of the base 2. The airtight core is inserted into the widened hole 408 of the sleeve 402 through the seat hole 405 in the middle of the top plate 401. The rubber ring 406 and rubber ring 407 on the inner wall of the seat hole 405 form a seal with the airtight core. The washer 409 at the bottom step of the widened hole 408 contacts the stepped plane of the airtight core to further prevent leakage. Then, the drive source installed in the reserved position of the base plate 201 controls the shaft wheel 9. The shaft wheel 9 is driven by the transmission belt. 11 drives the axle wheel 10 to rotate, which in turn drives the drive shaft 8 in the middle of the top plate 6 to rotate. The thread on the surface of the drive shaft 8 engages with the threaded sleeve 12 at the suspension plate 501, causing the suspension plate 501 to move up and down along the vertical rod 701 with the help of the sleeve 7. This allows the adjustment control 5 to approach and press the airtight core. Applying pressure to the airtight core can further improve the sealing effect. When the adjustment control 5 is pressed down, the recess below the bottom plate 512 matches the top contour of the airtight core, pressing the airtight core to maintain stability. At the same time, the drive component installed on the top of the suspension plate 501 drives... The rotating brake shaft sleeve 504 drives the bottom sleeve 505 and the sleeve shaft 507 to rotate synchronously. The irregular sliding hole 508 of the sleeve shaft 507 drives the flat-head cutter 514 to rotate. The flat-head cutter 514 matches the top groove of the airtight copper knob to achieve rotation control of the knob. The spring 509 between the brake shaft sleeve 504 and the bottom sleeve 505 can adapt to the screw-connected rotation of the knob through telescopic deformation. The airtight bushing 513 on the top of the connecting plate 511 improves the rotational stability of the flat-head cutter 514. The side hole 510 at the bottom of 507 allows for easy adjustment of the deformed flat-head cutter 514. Finally, the pump pipe is connected to the airtight core through the hole 408 at the bottom of the sleeve 402. Combined with the gas flow meter at the connecting column 403, the total amount of pumped gas is compared with the flow meter's detection amount to achieve flow monitoring. The entire testing process can be controlled by the electronic control integration 3 inside the protective shell 1, as well as the control button 202 and panel 203 on the base plate 201, to complete the flow detection of the airtight core under different knob openings.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A device for testing the airtightness flux of a blood pressure monitor, characterized in that, Includes a base (2) and a protective shell (1). The base (2) is provided with a material seat (4) on top. The material seat (4) is used to place a cylindrical airtight core in a vertical position. An adjustment control (5) is suspended directly above the material seat (4) by a lifting control component. The control unit (5) includes a suspension plate (501) and a flat-head knife (514) that matches the groove on the top of the copper knob of the airtight core. The flat-head knife (514) rotates under the driving action to control the copper knob of the airtight core and realize the opening and closing of the gas channel of the airtight core. The control panel (5) is also equipped with a stabilizing structure to ensure the rotational stability of the flat-head cutter (514) and to adapt to the rotation of the knob screw connection; The lifting control component is used to drive the adjustment control (5) to lift and press the airtight core. The material seat (4) uses its own structure to cooperate with the airtight core to achieve sealing and ventilation, thereby completing the flow rate detection.

2. The blood pressure monitor airtightness core flux testing device according to claim 1, characterized in that: The protective shell (1) is equipped with an electronic control integration (3), and the base plate (201) of the base (2) is equipped with a control button (202) and a panel (203). The electronic control integration (3) is electrically connected to the control button (202) and the panel (203).

3. The blood pressure monitor airtightness core flux testing device according to claim 1, characterized in that: The lifting control assembly includes several vertical rods (701), with a top plate (6) fixed to the top of each vertical rod (701). The adjustment control (5) includes a suspension plate (501), with several sleeves (7) installed on the suspension plate (501). The suspension plate (501) is slidably mounted on the surface of the vertical rod (701) through the sleeves (7) and moves along the length of the vertical rod (701).

4. The blood pressure monitor airtightness core flux testing device according to claim 1, characterized in that: A threaded sleeve (12) is installed at the suspension plate (501). The threaded sleeve (12) is fixedly installed at the suspension plate (501). A drive shaft (8) is rotatably installed in the middle of the top plate (6). The surface of the drive shaft (8) is threaded. The top of the base (2) is a base plate (201). The vertical rods (701) are all installed on the base plate (201). A shaft wheel one (9) and a shaft wheel two (10) are respectively provided below the base plate (201). The shaft wheel one (9) and the shaft wheel two (10) are connected by a transmission belt (11).

5. The blood pressure monitor airtightness core flux testing device according to claim 1, characterized in that: The material base (4) includes a sleeve (402) and a top plate (401). Connecting columns (403) are provided around the material base (4). A seat hole (405) is opened in the middle of the top plate (401). The widening hole (408) is located on the side of the top of the sleeve (402) facing the top plate (401). The diameter of the widening hole (408) is larger than the maximum diameter of the airtight core.

6. The blood pressure monitor airtightness core flux testing device according to claim 1, characterized in that: Rubber ring 1 (406) and rubber ring 2 (407) are respectively glued to the inner wall of the seat hole (405). The inner wall diameter of rubber ring 1 (406) and rubber ring 2 (407) is adapted to the diameter of the airtight core, or the inner wall diameter formed by rubber ring 1 (406) and rubber ring 2 (407) is smaller than the diameter of the airtight core. The airtight core and the diameter of the seat hole (405) form a sealed state. Rubber ring 2 (407) extends upward to the outside of the seat hole (405) and is turned outward. A gasket (409) is also provided at the bottom step of the widened hole (408). The gasket (409) contacts the plane of the step of the airtight core to avoid gas leakage.

7. The blood pressure monitor airtightness core flux testing device according to claim 5, characterized in that: The bottom of the sleeve (402) is also provided with a hole that extends through to the widening hole (408). The diameter of the hole is smaller than that of the widening hole (408). Connecting rods (404) are installed around the material seat (4). The connecting rods (404) are used to install the material seat (4) on the base plate (201). The base plate (201) is provided with a connecting hole (204) at the corresponding connecting column (403). The connecting hole (204) is used to pass through the pipeline to pump air to the material seat (4).

8. The blood pressure monitor airtightness core flux testing device according to claim 1, characterized in that: The adjustment control (5) also includes several support rods (502) fixed around the suspension plate (501). A connecting plate (511) is fixed to the bottom of the support rod (502), and a bottom plate (512) is fixedly connected to the bottom of the connecting plate (511). The support rod (502) is installed on the suspension plate (501) through a fixing sleeve (503), and the height position of the support rod (502) is adjusted through the fixing sleeve (503).

9. The blood pressure monitor airtightness core flux testing device according to claim 1, characterized in that: The stabilizing structure includes a brake shaft sleeve (504), and a bottom sleeve (505) matching the brake shaft sleeve (504) is provided below the brake shaft sleeve (504). When the brake shaft sleeve (504) rotates, the bottom sleeve (505) rotates synchronously, and a certain space is formed between the brake shaft sleeve (504) and the bottom sleeve (505). A sleeve shaft (507) is fixedly installed in the middle of the bottom sleeve (505). The middle of the sleeve shaft (507) is a sliding hole (508). The top of the flat one-head knife (514) is adapted to the inner wall of the sliding hole (508). A stop plate (506) is provided inside the brake shaft sleeve (504) and the bottom sleeve (505). A spring (509) is fixed at the bottom of the stop plate (506). The other end of the spring (509) is connected and fixed to the flat one-head knife (514).

10. A blood pressure monitor airtightness core flux testing device according to claim 9, characterized in that: The bottom of the sleeve shaft (507) is provided with a side hole (510), and the top of the connecting plate (511) is also provided with a hole. An airtight bushing (513) is placed in the hole. A flat-headed knife (514) is inserted into the airtight bushing (513) and rotates on the inner wall of the airtight bushing (513). A bottom plate (512) is fixed at the bottom of the connecting plate (511). A recess is provided in the center below the bottom plate (512). The recess matches the top contour of the airtight core. The recess is connected to the airtight bushing (513). The diameter of the connection is larger than the diameter of the copper knob.

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