A cuff and an electronic sphygmomanometer

Abstract

A cuff, comprising: a holding assembly including a plurality of holding units hinged in sequence from head to tail, several holding units including the holding unit at the tail end are rolled up to form an enclosing cavity, and the tail end of the holding unit at the tail end is detachably connected to one of the holding units; and an airbag assembly made of a flexible material, including a plurality of airbag units connected and communicated in sequence from head to tail, the plurality of airbag units are respectively arranged in the plurality of holding units, each airbag unit has a top portion protruding into the enclosing cavity, and the inner sides of the plurality of top portions enclose an enclosing cavity for enclosing the arm, and an inflation nozzle is provided on one of the airbag units. The cuff and the electronic sphygmomanometer of the present invention can be conveniently enclosed and untied, and are easy to operate and combine.

Description

Technical Field

[0001] The present application relates to the technical field of medical measurement devices, and particularly to a cuff and an electronic sphygmomanometer. Background Art

[0002] In the prior art, blood pressure measurement is mostly performed by the oscillometric method. The principle is to compress and block blood vessels through an inflated cuff, then slowly deflate, measure and record data through a pressure sensor to obtain the bell-shaped envelope of the pulse wave, and then find the characteristic points of systolic and diastolic blood pressures through corresponding algorithms. The pressure of the inflated cuff at the characteristic points is the corresponding systolic and diastolic blood pressures, and the pressure corresponding to the highest point of the envelope is the mean pressure. A blood pressure meter structure known to the inventor is as Figure 1 shown. The blood pressure meter includes a cuff, which is connected to a pneumatic joint in the main housing cavity through a hose. The pneumatic joint is respectively connected to a pressure sensor, an inflator pump and a deflation valve through pipes. The CPU makes the inflator pump inflate the cuff through a pump drive circuit, causing the cuff to expand and wrap around and compress the arm. After completely blocking the artery, the deflation valve is made to start deflating through a valve drive circuit. During this process, the signal processing circuit transmits the pulse pressure signal obtained by processing the electrical signal measured by the pressure sensor through amplification, analog-to-digital conversion, etc. to the CPU for analysis, and the CPU determines the corresponding systolic and diastolic blood pressures based on the obtained pulse pressure wave.

[0003] Among them, the existing cuffs generally form a cylinder through a hook-and-loop fastener to surround the arm, and then inflate the air bag of the cuff to compress the arm. Therefore, it is necessary to unfasten and reattach the hook-and-loop fastener each time of measurement, and there is still room for improvement in its operation efficiency.

[0004] The statements in this section only provide background information related to the present application and may not constitute prior art. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present application provides an electronic sphygmomanometer that can be conveniently enclosed and untied.

[0006] To achieve the above object, the present application provides the following technical solution: A cuff, which includes:

[0007] A holding assembly, including a plurality of holding units hinged end to end in sequence. Several holding units including the holding unit at the tail end are rolled up to form an enclosing cavity, and the tail end of the holding unit at the tail end is detachably connected to one of the holding units;

[0008] and an airbag assembly made of a flexible material, including a plurality of airbag units connected and communicated in sequence from head to tail, the plurality of airbag units are disposed in a plurality of holding units one by one, each airbag unit has a top portion extending into the enclosure cavity, and the inner sides of the plurality of top portions enclose an enclosure cavity for enclosing the arm, and an inflation nozzle is provided on one of the airbag units.

[0009] Preferably, the holding unit includes two side plates vertically facing each other on the left and right, an inner plate and an outer plate are spaced apart and fixed to the two side plates at the left and right ends one by one; a holding window is formed on the inner plate for the top portion to extend into the enclosure cavity through the holding window; the inner plate forms pressing rods respectively on both circumferential sides of the holding window, and the pressing rods press the top portion against the outer plate tightly in the radial direction.

[0010] Preferably, the head and tail sides of the airbag unit are respectively tightened to form a head side tightening portion and a tail side tightening portion.

[0011] Preferably, a support tube is fixed in the corresponding tightening portions of two adjacent airbag units at the head and tail to communicate their inner cavities.

[0012] Preferably, the inflation nozzle is connected to the head side of the airbag unit at the head end.

[0013] Preferably, one end of a baffle is fixed to the head side of the holding unit at the head end to prevent the airbag assembly from circumferentially disengaging.

[0014] Preferably, the inflation nozzle passes through and is fixed to the baffle.

[0015] Preferably, the tail end of the holding unit at the tail end is magnetically connected to the corresponding holding unit.

[0016] Preferably, a pressure sensor is provided on one of the airbag units, and the pressure sensor is fixed to the holding unit corresponding to the airbag unit.

[0017] The present invention also claims to protect an electronic sphygmomanometer, which includes: the above-mentioned cuff; a connecting hose, one end of which is communicated with the inflation nozzle; a main body, including an inflation pump and a deflation valve both communicated with the other end of the connecting hose; and a pressure sensor for sensing the pressure in the airbag unit, which is provided on one of the airbag units and fixed to the holding unit corresponding to the airbag unit.

[0018] The cuff and the electronic sphygmomanometer of the present invention can be conveniently enclosed and untied, are easy to operate and combine, and are easy to replace when the airbag assembly is damaged. It only needs to be deflated and then stuffed into the holding assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a known electronic sphygmomanometer;

[0020] Figure 2 Structural diagram of an electronic sphygmomanometer according to a preferred embodiment of the present invention;

[0021] Figure 3 Structural diagram of a cuff according to a preferred embodiment of the present invention;

[0022] Figure 4 Internal structural diagram of a main unit according to a preferred embodiment of the present invention;

[0023] Figure 5 Cross-sectional view of a cuff according to a preferred embodiment of the present invention;

[0024] Figure 6 Stereogram of a holding unit according to a preferred embodiment of the present invention;

[0025] Figure 7 Combined cross-sectional view of a single holding unit and a corresponding airbag unit according to another preferred embodiment of the present invention;

[0026] Figure 8 and Figure 9 Side view of a holding assembly according to a preferred embodiment of the present invention in two different combined states;

[0027] Figure 10 Structural schematic diagrams of the head and tail parts of a holding unit according to another preferred embodiment of the present invention;

[0028] Figure 11 Structural diagram of a pressure sensor according to a preferred embodiment of the present invention;

[0029] Figure 12 Structural diagram of a pressure sensor according to another preferred embodiment of the present invention;

[0030] In the figure: 100, main unit; 101, upper shell; 102, lower shell; 103, display unit; 104, button; 105, ventilation cover; 200, cuff; 3, connecting hose; 300, pressure sensor; 301, lower shell; 302, upper shell; 303, inner cavity; 304, substrate; 305, circuit board; 306, channel; 307, pressure core; 308, enclosure; 309, protective material; 310, ventilation hole; 311, waterproof and breathable membrane; 313, electronic component; 314, hole; 315, pin; 316, thick part; 317, holding seat; 318, elastic electrical connector; 319, fish-eye pin; 320, glue; 325, pin; 401, air flow buffer; 402, tube; 403, inflation pump; 404, control circuit board; 405, deflation valve; 50, holding assembly; 500, holding unit; 500a, holding unit at the head end; 500b, holding unit at the tail end; 501, outer plate; 502, inner plate; 503, circumferential opening; 504, holding window; 505, side plate; 506, head-side connecting part; 507, connecting hole; 508, pressing rod; 509, cavity; 510, pin; 511a, magnetic body; 511b, magnetic body; 512, tail-side connecting part; 513, edge; 514, notch; 515, baffle; 60, airbag assembly; 600, airbag unit; 601, bottom part; 602, top part; 603, neck part; 604, inflation nozzle; 605a, head-side tightening part; 605b, tail-side tightening part; 607, enclosing cavity. Detailed implementation manners

[0031] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application. In the following description, the same reference numerals are used to represent the same or equivalent elements, and repeated descriptions are omitted.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] In addition, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] It should be further understood that the term "and / or" used in the specification and corresponding claims of this application refers to any combination and all possible combinations of one or more of the listed items.

[0035] Please refer to Figure 2 , in an embodiment of the present invention, an electronic sphygmomanometer includes a cuff 200, a connecting hose 3, and a main unit 100. The main unit 100 includes a housing composed of an upper shell 101 and a lower shell 102. A display unit 103 and buttons 104 are provided on the upper shell 101. A ventilation cover 105 is also provided on the side of the housing. The intake end of the air pump 403 communicates with the inner cavity of the main unit 100, and ventilation holes for communicating the inner cavity of the main unit 100 with the atmosphere are provided on the ventilation cover 105.

[0036] Figure 4 shows a schematic diagram of the component layout in the inner cavity of the electronic sphygmomanometer. Among them, a support structure for supporting the air pump 403 and the tube 402 is provided on the inner wall of the lower shell 102. One end of the connecting hose 3 passes through the housing of the main unit 100 and then communicates with the tube 402. The tube 402 communicates with the outlet end of the air pump 403, and is connected and fixed to the air release valve 405. A control circuit board 404 is provided above the air pump 403, the air release valve 405, and the tube 402. The control circuit board 404 is connected to the display unit 103 and the buttons 104. A valve drive circuit for driving the air release valve 405, an air pump drive circuit for driving the air pump 403, and a signal processing circuit for processing the signals measured by the pressure sensor 300 (refer to Figure 3 ) are provided on the control circuit board 404.

[0037] In some other embodiments, preferably, the electronic sphygmomanometer further includes an air flow buffer 401 for buffering the air flow delivered from the air pump 403 to the air bag unit 600. The air flow buffer 401 can buffer the air flow through the volume of its inner cavity. Alternatively, preferably, a choke structure for restricting the smooth flow of the air flow, such as a curved air passage, more specifically, at least one "S" - shaped bend or a right - angled bend or a combination thereof, is provided in the air flow buffer 401.

[0038] Please refer to in combination Figures 5 to 7。The cuff of this embodiment includes a holding assembly 50 and an airbag assembly 60 made of a flexible material (such as polypropylene, polyester, nylon material, etc.).

[0039] The holding assembly 50 includes a plurality of holding units 500 hinged end to end in sequence. Several holding units 500, including the holding unit 500b at the tail end, are rolled up to form an enclosing cavity 607. The tail end of the holding unit 500b at the tail end is detachably connected to one of the holding units 500. The airbag assembly 60 includes a plurality of airbag units 600 connected and communicated end to end in sequence. The plurality of airbag units 600 are arranged in one-to-one correspondence with the plurality of holding units. Each airbag unit 600 has a top portion 602 extending into the enclosing cavity 607. The inner sides of the plurality of top portions 602 enclose an enclosing cavity 607 for enclosing the arm. An inflation nozzle 604 is provided on one of the airbag units 600. Preferably, the inflation nozzle 604 is connected to the head end side of the airbag unit 600 at the head end.

[0040] Please refer to Figure 6 , the holding unit 500 includes two side plates 505 vertically facing each other on the left and right. An inner plate 502 and an outer plate 501 are arranged at intervals and are fixedly connected to the two side plates 505 at the left and right ends in one-to-one correspondence. A holding window 504 is formed on the inner plate 502 for the top portion 602 to extend into the enclosing cavity 607 through the holding window 504. Pressing rods 508 are respectively formed oppositely on both circumferential sides of the holding window 504 of the inner plate 502. The pressing rods 508 press the top portion 602 against the outer plate 501 radially outward. The head end of the side plate 505 extends toward the head end side to form a head side connecting portion 506, and the tail end of the side plate 505 extends toward the tail end side to form a tail side connecting portion 512. A connecting hole 507 for hinging is provided on each of the tail side connecting portion 512 and the head side connecting portion 506.

[0041] Please refer to Figure 7 , in some other embodiments, preferably, the airbag unit 600 sequentially includes three parts in the radially outward direction, namely a top portion 602, a neck portion 603, and a bottom portion 601. The neck portion 603 is located in the holding window 504, and the pressing rod 508 presses against the bottom portion 601 toward the radially outer side. Preferably, the top portion 602 is thicker than the neck portion 603, so that the corresponding holding airbag unit 600 can be more firmly held after inflation.

[0042] The head and tail sides of the airbag unit 600 can be respectively tightened to form a head side tightening portion 605a and a tail side tightening portion 605b. This can make the airbag assembly 60 easy to roll up. Preferably, a support tube (not shown) is fixed in the corresponding tightening portions of two adjacent airbag units 600 at the head and tail to communicate their inner cavities, thereby avoiding poor communication during rolling up.

[0043] In some other embodiments, preferably, one end of a baffle 515 can be fixed to the head end of the holding unit 500a. A baffle 515 is fixed to the head end side to prevent the airbag assembly 60 from circumferentially escaping. The inflation nozzle 604 can pass through and be fixed on the baffle 515 to avoid displacement.

[0044] In some other embodiments, preferably, the tail end of the tail holding unit 500b is connected to the corresponding holding unit 500 by magnetic attraction. Figure 5 , Figure 7 and Figure 11 A magnetic body 511a is fixed to the edge 513 of the rear edge of each holding unit (for example, the straight edge on the side facing the winding direction). In addition to the above-mentioned magnetic body 511a, the holding unit 500a at the head end may also be provided with a magnetic body 511b on the opposite side of the magnetic body 511a, so as to be connected to the magnetic body 511a at the corresponding position after winding by magnetic attraction. Among them, the tail end and the head end of the holding unit 500b can be set to multiple straight edges, and the magnetic body is set on one of the straight edges. In a further preferred embodiment, the edges of the tail end and the head end of the holding unit 500b can also be set to a circular arc or an arc shape to facilitate connection. Figure 8 , Figure 9 The cavities 509 are respectively shown as being surrounded by six and five holding units 500. In some other embodiments, the cavities 509 may be surrounded by other numbers of holding units 500.

[0045] See also Figure 10 In some other embodiments, preferably, a slot 514 is formed in the left and right middle parts of the front side connecting part 506, so that the rear side connecting part 512 of the holding unit 500 adjacent to the front side can extend into the slot 514 and be hinged by the pin 510. The left and right midlines of the slot 514 are preferably aligned with the left and right centers of the rear side connecting part 512.

[0046] A pressure sensor 300 is disposed on one of the air bag units 600. The pressure sensor 300 is fixed to a holding unit 500 corresponding to the air bag unit 600. Figure 5 , which shows the specific structure of a pressure sensor 300 of a preferred embodiment. The pressure sensor 300 includes a flat shell formed by a lower shell 301 and an upper shell 302 that are fastened and fixed. The size of the shell in the direction perpendicular to the fastening direction is 2 to 4 times the size along the fastening direction, so that it can be more appropriately installed on the cuff 200. The shell is fixedly connected to the air bag unit 600, for example, the lower shell 301 and the upper shell 302 can be clamped on the edge of an opening opened on one of the air bag units 600, and bonded or bonded and sealed by glue 320. Among them, the lower shell 301 can be in the shape of a flat plate.

[0047] In the inner cavity 303 of the housing of the pressure sensor 300, a substrate 304 and a circuit board 305 are fixedly arranged in sequence from the inner side of the lower housing 301 towards the inner side. Electronic components 313 are arranged on the circuit board 305. A pressure core 307 is fixedly arranged on the inner side of the substrate 304. The first sensing surface of the pressure core 307 is communicated to the airbag unit 600 through a channel 306 arranged in the substrate 304 and the lower housing 301. The second sensing surface on the other side of the pressure core 307 is communicated to the atmosphere. For example, a ventilation hole 310 may be formed in the upper housing 302, and a waterproof and breathable membrane 311 may also be covered on the ventilation hole 310 to introduce atmospheric pressure into the inner cavity 303 while preventing clear water from passing through. Among them, a surrounding frame 308 may be fixedly arranged on the inner side of the circuit board 305. The surrounding frame 308 surrounds the pressure core 307, and a soft protective material 309, such as fluorosilicone gel, is filled therein, so as to protect the pressure core 307 while conducting atmospheric pressure. Among them, the pressure core 307 may be a MEMS core, which includes a silicon film deformed under the pressure difference on both sides. A measurement circuit (such as a Wheatstone bridge) composed of strain resistors is arranged on one side of the silicon film, and the pressures in the inner cavity 303 and the channel 306 are sensed on both sides thereof respectively. The circuit board 305 is connected to a power supply through a plurality of pins 325 and leads out the signal measured by the measurement circuit. Among them, a window may be formed on the circuit board 305 for the pressure core 307 to expose towards the side away from the lower housing 301. Among them, the upper housing 302 of the pressure sensor 300 may be fixedly arranged on the outer plate 501 of the corresponding holding unit 500.

[0048] Preferably, the substrate 304 is a ceramic plate, so that it can have a thermal expansion coefficient closer to that of the silicon film. The lower housing 301 and the substrate 304 may be fixedly connected through a fish-eye pin 319. Specifically, one end of the fish-eye pin 319 is fixedly embedded in the lower housing 301, and the other end of the fish-eye pin 319 is fixedly fitted in a communication hole formed on the substrate 304.

[0049] Please refer to Figure 5 , in another preferred embodiment, a connection structure for facilitating the extraction of measurement signals is provided, which includes a plurality of pins 315. One end of the pin 315 passes through a hole 314 formed in the upper housing 302 to the inner side of the upper housing 302 and abuts downward against an elastic electrical connector 318, and the other end of the elastic electrical connector 318 abuts against a pad formed on the circuit board 305.

[0050] One end of the elastic electrical connector 318 (such as a metal spring piece) is welded to the pad of the circuit board 305, or a plurality of elastic electrical connectors 318 are prevented from detaching from the circuit board 305 by a retaining seat 317. At this time, the elastic electrical connector 318 can be a conical spring with tapered portions formed at both ends. The conical spring passes through the retaining hole of the retaining seat 317, and a conical pressing surface for pressing against the outer side surface of the tapered portion by pressing toward the circuit board 305 is formed on the inner wall of the retaining hole. Preferably, one end of the pin 315 facing the elastic electrical connector 318 is enlarged to form a thick portion 316, and a positioning recess for the corresponding end of the elastic electrical connector 318 to extend into can be provided on the end surface of the thick portion 316.

[0051] The scope of the present disclosure is not limited by the detailed description, but is defined by the claims and their equivalents, and all variations within the scope of the claims and their equivalents are construed as being included in the present disclosure.

Claims

1. A cuff, characterized in that, it includes: a holding assembly (50), including a plurality of holding units (500) hinged end to end in sequence, and several holding units (500), including the holding unit (500b) at the tail end, are rolled up to form an enclosing cavity (607), and the tail end of the holding unit (500b) at the tail end is detachably connected to one of the holding units (500); and an airbag assembly (60) made of a flexible material, including a plurality of airbag units (600) connected and communicated end to end in sequence, and the plurality of airbag units (600) are respectively arranged in the plurality of holding units (500) one by one. Each airbag unit (600) has a top portion (602) protruding into the enclosing cavity (607), and the inner sides of the plurality of top portions (602) enclose an enclosing cavity (607) for enclosing the arm, and an inflation nozzle (604) is provided on one of the airbag units (600); wherein, the holding unit (500) includes two side plates (505) vertically facing each other on the left and right, an inner plate (502) and an outer plate (501) are arranged at intervals and are respectively fixed to the two side plates (505) at the left and right ends; a holding window (504) is formed on the inner plate (502) for the top portion (602) to protrude into the enclosing cavity (607) through the holding window (504); the inner plate (502) respectively forms pressing rods (508) on both circumferential sides of the holding window (504), and the pressing rods (508) press the top portion (602) against the outer plate (501) radially outward; the head and tail sides of the airbag unit (600) are respectively tightened to form a head side tightening portion (605a) and a tail side tightening portion (605b).

2. The cuff according to claim 1, characterized in that, support tubes are fixed in the corresponding tightening portions of two adjacent airbag units (600) at the head and tail to communicate their inner cavities.

3. The cuff according to claim 1, characterized in that, the inflation nozzle (604) is connected to one side of the head end of the airbag unit (600) at the head end.

4. The cuff according to claim 1, characterized in that, one end of a baffle plate (515) is fixed to one side of the head end of the holding unit (500a) at the head end, and a baffle plate (515) is provided to prevent the airbag assembly (60) from circumferentially slipping out.

5. The cuff according to claim 4, characterized in that, the inflation nozzle (604) passes through and is fixed on the baffle plate (515).

6. The cuff according to any one of claims 1 to 5, characterized in that, the tail end of the holding unit (500b) at the tail end is magnetically connected to the corresponding holding unit (500) among them.

7. The cuff according to any one of claims 1 to 5, characterized in that, a pressure sensor (300) is provided on one of the airbag units (600), and the pressure sensor (300) is fixed on the holding unit (500) corresponding to the airbag unit (600).

8. An electronic sphygmomanometer, characterized in that, it includes: the cuff according to any one of claims 1 to 6; A connecting hose (3) with one end communicating with an inflation nozzle (604); A main unit (100) including an inflation pump (403) and a deflation valve (405) both communicating with the other end of the connecting hose (3); And a pressure sensor (300) for sensing the pressure inside the airbag unit (600), which is disposed on one of the airbag units (600) and fixed to the corresponding holding unit (500) for this airbag unit (600).

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