Blood pressure instrument

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a blood pressure instrument which comprises a base, a sleeve used for being arranged on an arm in a sleeving mode, a blood pressure cuff arranged in an inner cavity of the sleeve, and a protective film supply mechanism arranged in an electrical installation cavity and used for supplying a protective film to a C-shaped cavity in the inner side of the blood pressure cuff. The protective film spreading mechanism is arranged on one side of the sleeve and is used for spreading the protective film from the protective film supply mechanism in the C-shaped cavity to form a concave part; the sleeve comprises a lower half shell and an upper half shell which are enclosed to form a cylindrical structure, the upper half shell and the lower half shell are longitudinally and rotatably connected with the base, and a winding mechanism used for winding the tail end of the protective film is arranged in the upper half shell; through cooperation of the protective film supply mechanism, the protective film spreading mechanism and the upper half shell capable of being opened, continuous protective film replacement operation can be achieved, a new protective film part can be replaced for each time of use, and the use infection risk between patients is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a blood pressure monitor. Background Art

[0002] Desktop sphygmomanometers are one of the most commonly used medical devices in hospitals. Desktop sphygmomanometers in outpatient clinics are large in size, and the cuffs are prone to bacterial contamination. In actual work, a sphygmomanometer and its cuff will be used repeatedly, and the bacterial colonies carried on the cuffs may increase with the increase in the number of uses and the extension of the use time.

[0003] The existing cuff is difficult to disassemble and has many wrinkles. Moreover, the cuff of the sphygmomanometer is in direct contact with the patient's skin and is reused, which has the potential risk of spreading infectious pathogens. Summary of the invention

[0004] The object of the present invention is to provide a blood pressure monitor to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a blood pressure monitor, comprising a base, wherein an electrical installation cavity is provided inside the base; Also included is a cuff for being put on an arm when measuring a person's blood pressure; Also included is a blood pressure cuff, which is disposed in the inner cavity of the sleeve and is used to fit the blood pressure detection sensor on the inner side wall of the sleeve onto the arm when inflated and pressurized; It also includes a protective film supply mechanism, which is arranged in the electrical installation cavity and is used to supply a protective film to the C-shaped cavity inside the blood pressure cuff; It also includes a protective film spreading mechanism, which is disposed on one side of the sleeve and is used to spread the protective film from the protective film supply mechanism in the C-shaped cavity to form a concave portion, and the concave portion is used to accommodate the arm; Among them, the sleeve includes a lower half shell and an upper half shell which are enclosed to form a cylindrical structure, the upper half shell and the lower half shell are both longitudinally rotatably connected to the base, and a winding mechanism for winding up the end of the protective film is provided in the upper half shell; the upper half shell and the base are respectively provided with an inlet and an outlet for the protective film to pass through.

[0006] The blood pressure monitor described in the present invention is characterized in that the protective film spreading mechanism is located on the side of the upper half shell away from its rotating axis, the base is provided with a mounting position for installing the protective film spreading mechanism, the upper half shell is provided with an avoidance groove for avoiding the protective film spreading mechanism, the inlet is located on the bottom surface of the avoidance groove, and when installed in place, one end of the upper half shell away from its rotating axis is affixed to the mounting position.

[0007] The blood pressure monitor described in the present invention, wherein the protective film spreading mechanism includes a boss protruding upward on the mounting position, and an extension tube extending into the electrical installation cavity; the extension tube is integrally arranged at the lower end of the boss, and an air duct connected to the extension tube is provided in the boss, and the air outlet of the air duct faces the rotating shaft of the upper half shell; and an air supply mechanism for supplying air to the extension tube is also provided in the electrical installation cavity.

[0008] The blood pressure monitor described in the present invention is characterized in that a mounting plate is provided on the base along the axial direction of the upper half shell, a mounting position is formed on the upper surface of the mounting plate, a mounting window is provided on the base corresponding to the mounting plate, the mounting window passes through the base at one end facing the lower half shell, the boss and the extension tube are respectively provided on the upper and lower surfaces of the mounting plate, a groove is provided on one side wall of the mounting plate facing the rotating shaft of the upper half shell, and the inner wall of the groove and the inner wall of the mounting window enclose the outlet.

[0009] The blood pressure monitor described in the present invention, wherein the air supply mechanism includes a fan, an expansion cavity connected to the air outlet of the fan, and an anti-static ion generator arranged inside the expansion cavity; the outlet end of the expansion cavity is connected to the extension tube through a connecting tube.

[0010] The blood pressure monitor described in the present invention is characterized in that the connecting tube is a metal tube and is parallel to the rotating axis of the upper half shell, the extension tube is vertically connected to the connecting tube, and a supporting roller group supporting the protective film is provided in parallel on the lower bottom surface of the lower half shell. When assembled in place, the protective film on one side of the discharge end of the supporting roller group is parallel to and attached to the connecting tube.

[0011] The blood pressure monitor of the present invention, wherein an upwardly emitting ultraviolet lamp is provided in the electrical installation cavity on the side of the supporting roller group away from the lower half shell.

[0012] The blood pressure monitor described in the present invention, wherein the protective film supply mechanism includes a protective film roller parallel to the rotating shaft of the lower half shell and located below it, and a driving motor that drives the protective film roller to rotate on a fixed axis.

[0013] The blood pressure monitor described in the present invention, wherein the interior of the upper half shell has a storage chamber, the winding mechanism includes two winding rollers parallel to the rotating axis of the upper half shell and located at one end of the storage chamber close to the mounting position, and a winding motor driving the winding rollers to rotate; the side walls of the two winding rollers are parallel and fitted together, and an annular convex rib is provided on the inner side wall of the storage chamber corresponding to the inlet, and the discharge port of the annular convex rib is directly opposite to the position tangent to the two winding rollers and is parallel to each other.

[0014] The sphygmomanometer described in the present invention, wherein a window is provided on the convex side wall of the upper half shell, and a flip cover for sealing the window; the flip cover is coaxially rotatably connected to the upper half shell. Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation of the protective film supply mechanism, the protective film spreading mechanism and the openable upper half shell, the present invention can realize continuous replacement operation of the protective film. For each use, a new part of the protective film can be replaced, and the used part can be recycled through the winding mechanism to update the protective film inside the C-shaped cavity, avoiding direct contact between the blood pressure cuff and the patient's arm, and thus greatly reducing the risk of cross-infection between patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a top view of the present invention.

[0017] Figure 2 is Figure 1 the A-A cross-sectional view of.

[0018] Figure 3 is Figure 2 the enlarged view of the partial structure in.

[0019] Figure 4 is Figure 2 the state diagram with the flip cover opened in.

[0020] Figure 5 is Figure 2 the state diagram with the upper half shell opened in.

[0021] Figure 6 It is a top view of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The terms "first", "second", "third" and "fourth" etc. in the specification, claims and drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products or devices.

[0023] References to "embodiments" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0024] "Plurality" means two or more. "And / or" describes the relationship between associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0025] Moreover, terms indicating directions such as "upper, lower, left, right, upper end, lower end, longitudinal" etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0026] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] This embodiment discloses a sphygmomanometer as Figures 1 to 6 shown. The sphygmomanometer includes a base 10, which has an electrical installation cavity 101 inside. The base 10 is specifically a conventional cuboid structure on the market, generally composed of a bottom plate and an upper cover. The internal electrical installation cavity 101 is used to install various components, such as a receipt printer 20 and a control board 30.

[0028] The sphygmomanometer further includes a cuff 40, which is used for a person to insert their hand and put it on the arm when measuring human blood pressure. The cuff 40 is generally arranged on the right side of the top of the base 10, and a display screen 50 is generally arranged on the left side of the top of the base 10 for the patient to observe the measured value after measurement.

[0029] The blood pressure monitor further includes a blood pressure cuff 60, which is disposed in the inner cavity of the sleeve 40 by means of conventional means such as Velcro or glue and is used to make the blood pressure detection sensor on the inner side wall thereof fit against the arm when inflated and pressurized, so as to measure the blood pressure of the patient; in addition, in order to ensure the accuracy of the patient's measurement posture, an inclined support plate 70 for the patient's forearm to lean against is provided on the top of the base 10 and behind the sleeve 40, and a positioning protrusion 61 for positioning is provided at the rear end of the inner side wall of the blood pressure cuff 60 corresponding to the patient's elbow pit. The density of the blood pressure measurement sensors on the positioning protrusion 61 is greater than that of other positions, so as to detect the unique pulsation and blood pressure of the elbow pit in advance through the blood pressure measurement sensors on the positioning protrusion 61 before measurement, and then the control system determines whether the patient's arm posture is correct. Generally, when the patient's palm faces down, the radius and ulna are staggered, and the brachioradialis, extensor carpi radialis longus and pronator teres muscles deflect. This deflection position will cause changes in the pulsation and blood pressure of the elbow pit, which are different from the values when the palm faces up. Therefore, through the specific positioning protrusion 61 and the speaker of the control system, the patient's incorrect posture can be accurately identified and reminded to ensure the accuracy of the measurement result.

[0030] The blood pressure monitor further includes a protective film supply mechanism 80, which is disposed in the electrical installation cavity 101 and is used to supply the protective film 500 to the C-shaped cavity 62 inside the blood pressure cuff 60, so that when the patient places the arm in the C-shaped cavity 62, the arm and the blood pressure cuff 60 are isolated by the protective film 500; among them, the protective film 500 generally has a structure of a material roll, and the material of the protective film 500 can be a plastic film with a smaller thickness and relatively strong strength. Of course, other films can also be used.

[0031] The blood pressure monitor further includes a protective film spreading mechanism 90, which is disposed on one side of the sleeve 40 and is used to spread the protective film from the protective film supply mechanism 80 to form a recess 501 in the C-shaped cavity 62. The recess 501 is used to accommodate the arm to guide the patient to place the arm for the purpose of avoiding misoperation by the patient who uses it for the first time.

[0032] Among them, the cuff 40 includes a lower half shell 41 and an upper half shell 42 that enclose to form a cylindrical structure. Both the upper half shell 42 and the lower half shell 41 are longitudinally rotatably connected to the base 10 through a rotating shaft 100. Specifically, both ends of the blood pressure cuff 60 are respectively connected to the inner side walls of the upper half shell 42 and the lower half shell 41. When the upper half shell 42 is opened, it will drive the protective film to elongate. When the upper half shell 42 is closed, the elongated protective film will cover and form a closed C-shaped structure to wrap around the patient's arm, thus isolating the skin from the blood pressure cuff 60. In order to improve the automation level of the instrument for convenient use, an additional drive motor can be set to drive the opening and closing of the upper half shell 42, and this motor can also be used to keep the upper half shell 42 buckled on the lower half shell 41 to ensure the complete progress of the blood pressure measurement process.

[0033] In addition, in order to facilitate the fixation of the cuff 40, vertical plate bodies 110 are integrally provided on the upper surface of the base 10 on the left and right sides of the cuff 40. The plate bodies 110 are arranged in the front-back direction. Among them, the rotating shafts 100 of both the upper half shell 42 and the lower half shell 41 are provided at the upper ends of the left plate body 110, and the lower half shell 41 is located between the two plate bodies 110, and both the front and rear ends of the two plate bodies 110 are closed to form a cuboid structure with an open upper end. When the upper half shell 42 is closed, it covers the upper end surface of this cuboid structure.

[0034] Furthermore, a winding mechanism 120 for winding the end of the protective film is provided inside the upper half shell 42, so as to wind the used part of the protective film into the upper half shell 42 after the measurement of the previous patient, and pull out the new part of the protective film from the protective film supply mechanism 80 and spread it again in the C-shaped cavity 62 through the protective film spreading mechanism.

[0035] Among them, an inlet 421 and an outlet 422 for the protective film 500 to pass through are respectively provided on the upper half shell 42 and the base 10. Both the outlet 422 and the inlet 421 are rectangular and have a relatively narrow width, which can avoid foreign objects outside from entering the inside of the base 10 and the upper half shell 42 while ensuring the normal passage of the protective film.

[0036] Before measurement, the upper half shell 42 drives the upper end of the blood pressure cuff 60 to open synchronously, and the end of the protective film passes through the outlet 422, and passes through the interior of the upper half shell 42 through the inlet 421 and is rolled up to a certain length through the rolling mechanism 120, so that the end of the protective film is fixed. When it is needed to use the measurement, the upper half shell 42 is opened again. At this time, the opened upper half shell 42 drives the end of the protective film to stretch, and then the stretched protective film can be used to form a certain recess 501 between the upper half shell 42 and the lower half shell 41 through the protective film spreading mechanism, prompting the patient to place the arm corresponding to the recess 501 between the lower half shell 41 and the upper half shell 42. After it is in place, the upper half shell 42 is reset and closed to form a cylindrical structure with the lower half shell 41. At this time, the stretched protective film also presents a closed C-shaped structure and covers the patient's arm. At this time, the blood pressure cuff 60 is inflated and pressurized to put the inner blood pressure detection sensor close to the arm for blood pressure measurement. When the measurement is completed, the upper half shell 42 is opened. At this time, the user moves out his arm, and then the winding mechanism 120 rolls up the used part of the protective film into the upper half shell 42, thereby preparing for the next measurement.

[0037] Among them, the opening and closing of the upper shell 42 can be completed by a control system. The opening operation of the upper shell 42 can be achieved by the patient operating the switch of the instrument or by setting a sensor for sensing the human body on the front side wall of the base 10. The closing and maintenance of the upper shell 42 can be achieved by controlling the driving motor through the control system. This belongs to the conventional prior art and will not be elaborated here.

[0038] In this embodiment, the protective film spreading mechanism 90 is located on the side of the upper half shell 42 away from its rotation axis, so that after the upper half shell 42 is opened, the protective film is located in front of the patient's moving arm, making the detection operation more convenient and improving the humanized design; specifically, a mounting position 102 for installing the protective film spreading mechanism is provided on the base 10, and specifically, the mounting position 102 is specifically located on the upper end surface of the right side plate 110; an avoidance groove 423 for avoiding the protective film spreading mechanism is provided on the upper half shell 42, and the entrance 421 is located on the bottom surface of the avoidance groove 423. When installed in place, the end of the upper half shell 42 away from its rotation axis is attached to the mounting position 102, wherein the avoidance groove 423 can also play an additional role in assisting the positioning of the upper half shell 42.

[0039] Further, in order to ensure that the motor driving the upper half shell 42 to rotate is loaded with less torque during measurement, a latch 140 can be arranged inside the base 10. When the upper half shell 42 is closed, the upper half shell 42 can be latched to the lower half shell 41 through the latch 140. The latch 140 can be manual, such as a conventional latch structure or a bolt structure. Of course, it can also be electric. If it is electric, the driving motor of the latch is connected to the control system. The implementation principle of this technology is prior art, and common electric door locks on the market and in daily life can achieve it, so no more details will be described here.

[0040] In this embodiment, the protective film spreading mechanism 90 includes a boss 91 protruding upward from the installation position 102 and an extension tube 92 extending into the electrical installation cavity 101. Specifically, the boss 91 is preferably designed to be strip-shaped and parallel to the rotating shaft of the upper half shell 42. Correspondingly, the avoidance groove 423 is also strip-shaped. Among them, the extension tube 92 is integrally arranged at the lower end of the boss 91, and a plurality of extension tubes 92 are uniformly arranged along the length direction of the boss 91. An air duct 910 communicating with the internal channel of the extension tube 92 is arranged in the boss 91. The air outlet of the air duct 910 faces the rotating shaft of the upper half shell 42, specifically in an inclined downward state. Further, an air supply mechanism 150 for supplying air to the extension tube 92 is also arranged in the electrical installation cavity 101. During the opening process of the upper half shell 42, the air supply mechanism 150 continuously supplies high-speed air flow to the air duct 910, so that the middle part of the extended protective film tends to adhere to the inner concave surface of the blood pressure cuff 60, thereby forming a concave part for reminding the patient to place the arm. By spreading the protective film through air flow, the complexity and volume of the overall structure can be greatly simplified, and the operation of placing the patient's arm will not be affected during the spreading process.

[0041] Among them, a mounting plate 160 is arranged on the base 10 along the axial direction of the upper half shell 42. Specifically, the mounting plate 160 is located on the upper end surface of the right plate body 110. The upper surface of the mounting plate 160 forms a mounting position 102. Specifically, a mounting window 170 corresponding to the mounting plate 160 is arranged on the upper end surface of the right plate body 110 of the base 10. One end of the mounting window 170 facing the lower half shell 41 penetrates the base 10, specifically penetrating the left side wall of the right plate body 110. The boss 91 and the extension tube 92 are respectively arranged on the upper and lower surfaces of the mounting plate 160. A groove 161 is arranged on one side wall of the mounting plate 160 facing the rotating shaft of the upper half shell 42. The inner wall of the groove 161 and the inner wall of the mounting window 170 enclose an outlet 422, so that the outlet 422 is located below the air outlet of the air duct 910. After the upper half shell 42 drives the protective film to extend, the air flow ejected from the air outlet spreads the protective film in the direction of the rotating shaft of the upper half shell 42 and adheres it to the inner concave surface of the blood pressure cuff 60 to form a concave part. The structural design that the groove 161 penetrates the left side of the right plate body 110 is convenient for replacing the material roll of the new protective film after the lower half shell 41 is opened.

[0042] Furthermore, the air supply mechanism 150 includes a fan 151, an expansion chamber 152 connected to the air outlet of the fan 151, and an anti-static ion generator (not shown) arranged inside the expansion chamber 152; wherein the anti-static ion generator can be directly purchased as a ready-made module on the market, and the outlet 422 end of the expansion chamber 152 is connected to the extension pipe 92 through the connecting pipe 15a; further, the connecting pipe 15a is a metal pipe and is parallel to the rotating shaft of the upper half shell 42, the extension pipe 92 is vertically connected to the connecting pipe 15a, and a support roller group supporting the protective film 500 is provided in parallel on the lower bottom surface of the lower half shell 41 180, when assembled in place, the protective film 500 on one side of the discharge end of the support roller group 180 is parallelly attached to the connecting tube 15a; in the process of the upper half shell 42 opening and driving the protective film 500 to extend, since the plastic film-like protective film will generate static electricity when it is unfolded, in order to avoid the adverse effects of the static electricity, the cooperation of the fan 151, the anti-static generator and the connecting tube 15a can ensure that the extended protective film only carries a very small amount of static electricity or is uncharged, so as to improve the user experience during the measurement process and avoid the protective film from discharging and irritating the patient's arm or being adsorbed on the patient's arm due to static electricity.

[0043] In addition, in order to further improve the adaptability and user experience of the instrument, a heating wire can be added inside the expansion cavity 152 to heat the extended protective film in cold weather so that its temperature is closer to the comfortable temperature of the human body.

[0044] In this embodiment, an upward-emitting ultraviolet lamp 190 is provided in the electrical installation cavity 101 on the side of the support roller group 180 facing away from the lower half shell 41. The ultraviolet lamp 190 can be used to sterilize and disinfect the part of the protective film that is exposed to the electrical installation cavity 101 for a long time, and can also be used to sterilize and disinfect the part where the protective film is retracted.

[0045] In this embodiment, the protective film supply mechanism 80 includes a protective film roller 81 which is parallel to the rotating shaft 100 of the lower half shell 41 and located below the lower half shell 41, and a driving motor (not shown) which drives the protective film roller 81 to rotate on a fixed axis; the driving motor is connected to the control system to facilitate the coordinated control of the control system; further, in order to facilitate the opening of the lower half shell 41 and the replacement of a new protective film, the protective film roller 81 is connected to the material axis of the protective film material roller in a detachable manner, and the specific connection method can be coaxial magnetic attraction, coaxial sleeve arrangement through a sleeve, or coaxial locking through overlapping screws.

[0046] In this embodiment, the interior of the upper half shell 42 has a storage cavity 424. The winding mechanism 120 includes two winding rollers 121 that are parallel to the rotating shaft of the upper half shell 42 and are located at one end of the storage cavity 424 close to the installation position 102, and a winding motor 122 that drives the winding rollers 121 to rotate. The side walls of the two winding rollers 121 are parallel and in contact with each other. An annular rib 200 is provided on the inner side wall of the storage cavity 424 corresponding to the inlet 421. The discharge port of the annular rib 200 is directly opposite and parallel to the position where the two winding rollers are tangent. Through the cooperation of the two winding rollers 121, the used part of the protective film can be stored into the storage cavity 424. Among them, the structural design of the annular rib 200 can prevent the protective film from being driven by the winding rollers and passing out reversely from the inlet 421.

[0047] In this embodiment, a window 425 is provided on the convex side wall of the upper half shell 42, and a flip cover 426 for sealing the window 425; the flip cover 426 is rotatably connected coaxially with the upper half shell 42. When the material roll of the entire protective film is used up, the used protective film can be removed by opening the flip cover 426.

[0048] It should be understood that those of ordinary skill in the art can make improvements or changes according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. A blood pressure monitor, characterized in that: It includes a base, and an electrical installation cavity is provided inside the base; Also included is a cuff for being put on an arm when measuring a person's blood pressure; Also included is a blood pressure cuff, which is disposed in the inner cavity of the sleeve and is used to fit the blood pressure detection sensor on the inner side wall of the sleeve onto the arm when inflated and pressurized; It also includes a protective film supply mechanism, which is arranged in the electrical installation cavity and is used to supply a protective film to the C-shaped cavity inside the blood pressure cuff; It also includes a protective film spreading mechanism, which is disposed on one side of the sleeve and is used to spread the protective film from the protective film supply mechanism in the C-shaped cavity to form a concave portion, and the concave portion is used to accommodate the arm; Among them, the sleeve includes a lower half shell and an upper half shell which are enclosed to form a cylindrical structure, the upper half shell and the lower half shell are both longitudinally rotatably connected to the base, and a winding mechanism for winding up the end of the protective film is provided in the upper half shell; the upper half shell and the base are both provided with an inlet and an outlet for the protective film to pass through.

2. The blood pressure monitor according to claim 1, characterized in that: The protective film spreading mechanism is located on the side of the upper half shell away from its rotating axis, the base is provided with a mounting position for installing the protective film spreading mechanism, the upper half shell is provided with an avoidance groove for avoiding the protective film spreading mechanism, the entrance is located on the bottom surface of the avoidance groove, and when installed in place, one end of the upper half shell away from its rotating axis is attached to the mounting position.

3. The blood pressure monitor according to claim 2, characterized in that: The protective film spreading mechanism includes a boss protruding upward on the installation position, and an extension tube extending into the electrical installation cavity; the extension tube is integrally arranged at the lower end of the boss, and an air duct connected to the extension tube is provided in the boss, and the air outlet of the air duct faces the rotating shaft of the upper half shell; the electrical installation cavity is also provided with an air supply mechanism for supplying air to the extension tube.

4. The blood pressure monitor according to claim 3, characterized in that: A mounting plate is provided on the base along the axial direction of the upper half shell, and a mounting position is formed on the upper surface of the mounting plate. A mounting window is provided on the base corresponding to the mounting plate, and the mounting window passes through the base at one end facing the lower half shell. The boss and the extension tube are respectively provided on the upper and lower surfaces of the mounting plate, and a groove is provided on one side wall of the mounting plate facing the rotating shaft of the upper half shell, and the inner wall of the groove and the inner wall of the mounting window enclose the outlet.

5. The blood pressure monitor according to claim 3, characterized in that: The air supply mechanism includes a fan, an expansion cavity connected to the air outlet of the fan, and an anti-static ion generator arranged inside the expansion cavity; the outlet end of the expansion cavity is connected to the extension tube through a connecting pipe.

6. The blood pressure monitor according to claim 5, characterized in that: The connecting tube is a metal tube and is parallel to the rotating axis of the upper half shell. The extension tube is vertically connected to the connecting tube. A supporting roller group supporting the protective film is provided in parallel on the lower bottom surface of the lower half shell. When assembled in place, the protective film on one side of the discharge end of the supporting roller group is parallel to the connecting tube.

7. The blood pressure monitor according to claim 6, characterized in that: An upwardly emitting ultraviolet lamp is provided in the electrical installation cavity on the side of the supporting roller group away from the lower half shell.

8. The blood pressure monitor according to any one of claims 1 to 7, characterized in that: The protective film supply mechanism comprises a protective film roller which is parallel to the rotating shaft of the lower half shell and is located below it, and a driving motor which drives the protective film roller to rotate on a fixed axis.

9. The blood pressure monitor according to claim 2, characterized in that: The interior of the upper half shell has a storage cavity, and the winding mechanism includes two winding rollers which are parallel to the rotating axis of the upper half shell and located at one end of the storage cavity close to the mounting position, and a winding motor which drives the winding rollers to rotate; the side walls of the two winding rollers are parallel and fitted together, and an annular convex rib is provided on the inner side wall of the storage cavity corresponding to the inlet, and the discharge port of the annular convex rib is directly opposite to the position tangent to the two winding rollers and is parallel to each other.

10. The blood pressure monitor according to claim 9, characterized in that: A window is provided on the convex side wall of the upper half shell, and a flip cover is provided to seal the window; the flip cover is connected to the upper half shell by coaxial rotation.

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