A waterproof key structure for a sphygmomanometer and an electronic sphygmomanometer

Abstract

The application discloses a waterproof key structure for a sphygmomanometer and an electronic sphygmomanometer, and relates to the technical field of sphygmomanometers. The waterproof key structure comprises a key body and a sphygmomanometer front shell, the key body is composed of a key cap and a columnar connecting piece with a limiting buckle, the front shell is provided with a matching installation groove, a water-blocking convex edge is arranged in the installation groove, the columnar connecting piece is in abutment with an elastic pad through a middle through hole of the water-blocking convex edge, the limiting buckle of the columnar connecting piece is adaptively connected with a buckle on the inner wall of the water-blocking convex edge, the water-blocking convex edge and the groove bottom and groove wall of the installation groove surround a back-shaped groove, and a flow guide channel is connected to realize active water drainage. In addition, the key cap is in sliding connection with the installation groove, and the elastic pad with a trigger convex block is used to realize a pressing and rebounding action after the key body is pressed, so that the structural sealing property and the operation feeling are ensured. Therefore, the sphygmomanometer with the waterproof key structure has better waterproof performance and comfortable operation feeling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical auxiliary devices, in particular to a sphygmomanometer capable of being applied in surgical diagnosis, and more particularly to a waterproof key structure capable of improving the waterproof effect of a sphygmomanometer and an electronic sphygmomanometer adopting the same. BACKGROUND

[0002] The sphygmomanometer is a medical instrument for measuring blood pressure, and the switch key is an important component thereof. The existing electronic sphygmomanometer can be divided into mechanical key type and touch screen type according to the key type. Compared with the mechanical key, the touch screen key cannot feel the real feeling of the key when operating, has no pressing feedback, and the user experience is not good. The mechanical key has a mechanical real feeling when operating, and is more in line with the operation habit of the public.

[0003] However, the mechanical key type electronic sphygmomanometer is a device with a cover assembly, and the key is usually arranged on the upper cover. The device is operated by pressing the key. In order to facilitate smooth pressing of the key and reduce friction of the key in the lifting process, an assembly gap is arranged between the upper cover and the key. The structure seal of the assembly gap is usually an elastic sealing ring. However, the elastic sealing ring is prone to aging and deformation after long-term pressing, which leads to failure of the sealing structure. Therefore, in a humid environment, water droplets or water vapor can easily penetrate into the interior of the equipment through the gap. If water splashes on the upper cover during daily use, the water will flow into the interior of the equipment through the gap between the upper cover and the key. The interior of the equipment usually has electronic devices such as solenoid valves and circuit boards, which can damage or short circuit the internal components of the equipment, greatly shortening the service life of the electronic sphygmomanometer.

[0004] In view of the problem of insufficient waterproof performance of the key due to sealing failure, the traditional solution is to increase the sealing strength, but this makes the key touch feel stiff and affects the operation sensitivity. Chinese invention patent CN202310760433.6 discloses a cover assembly, a device with a cover assembly and a sphygmomanometer. The patent document proposes a specific solution. The waterproof structure principle of the solution is as follows: first, the annular connecting structure protruding on the cover is like a “fence” that blocks most of the splashing water; second, the first connecting part of the flexible silica gel sealing element is tightly fitted on the outer wall of the connecting structure in an interference fit, forming a 360° radial seal; the second connecting part is always in contact with the end face of the key, forming an end face seal. Even if a small amount of water enters from the key gap, it will be stopped by the two seals and cannot penetrate into the internal circuit; third, the sealing element is designed with an annular groove on the side of the key, which can temporarily “store” a small amount of infiltrated water, reducing the instantaneous water pressure; at the same time, the third connecting part which is inclined and thin deforms elastically when the key is pressed, ensuring the triggering of the switch without damaging the seal.

[0005] Although the technical solutions disclosed in the above documents can isolate water entering from the self-gap outside the shell through the annular connecting structure protruding on the cover and the flexible silica gel seal adapted thereto, there are still the following defects in specific application:

[0006] Firstly, the flexible silica gel seal adopts silica gel / rubber, which will accelerate hardening and cracking, lose the interference amount, and cause the waterproof level to drop when long-term contact with alcohol, chlorine-containing disinfectants or ultraviolet rays in hospitals and clinics; secondly, the elastic modulus of the flexible silica gel seal becomes larger after aging, and the medical staff will feel that the "key becomes hard", which requires greater pressing force, which may affect one-handed quick operation, and even induce mis-touch or repeated triggering; thirdly, the annular connecting structure and the flexible silica gel seal adopt interference fit, which requires high dimensional processing precision, and excessive interference will cause the key to jam, and insufficient interference will cause water seepage, resulting in high processing requirements and processing cost; fourthly, the sealing structure and the cover are tightly fitted, which is easy to pull and crack the silica gel ring when disassembling and repairing or calibrating, and after reassembly, the original waterproof level cannot be guaranteed, and the cover assembly needs to be replaced as a whole, increasing maintenance costs; finally, in high-altitude low-pressure environments or high-temperature high-humidity surgical environments, silica gel absorbs moisture and swells, which may cause excessive deformation of the third connecting part, resulting in "self-triggering" or "key not rebounding" phenomenon, interfering with the operation of the sphygmomanometer.

[0007] It can be seen that the technical solutions provided in the above patent documents still have limitations, therefore, the problem of seal failure and insufficient waterproof caused by aging of the sealing ring has not been well solved, and therefore, it is necessary to propose a new technical solution to solve the above problems. SUMMARY

[0008] The present application provides a waterproof key structure for a sphygmomanometer and an electronic sphygmomanometer to solve the problem of insufficient waterproof performance of the key caused by aging of the sealing ring of the existing sphygmomanometer, which affects the service life of the sphygmomanometer.

[0009] In order to achieve the above purpose, the present application provides the following technical solutions:

[0010] In one aspect, the application provides a waterproof button structure for a sphygmomanometer, which comprises a button body and a sphygmomanometer front shell for mounting the button body; the button body comprises a button cap and a columnar connecting piece connected below the button cap, two limiting installation buckles are oppositely arranged on the side wall near the bottom of the columnar connecting piece; an installation groove adapted to the button cap is formed on the sphygmomanometer front shell, a through hole allowing the columnar connecting piece to pass through is formed on the groove bottom, a waterproof convex edge is arranged on the inner wall of the waterproof convex edge along the upper edge of the through hole, a clamping groove adapted to the limiting installation buckle is arranged on the inner wall of the waterproof convex edge, the waterproof convex edge, the groove wall and the groove bottom of the installation groove form a U-shaped groove, a water guide channel communicating with the U-shaped groove is formed in the sphygmomanometer front shell, and the water outlet end of the water guide channel is arranged on the outer wall of the sphygmomanometer front shell; a gap is arranged between the lower surface of the button cap and the top of the waterproof convex edge, the outer edge of the button cap is slidably connected with the groove wall of the installation groove, an elastic pad is arranged on the lower surface of the installation groove, a protrusion for triggering a switch contact is arranged on the lower surface of the elastic pad, the columnar connecting piece abuts against the elastic pad through the through hole, and the protrusion is located below the columnar connecting piece.

[0011] Further in the above technical solution, the size of the columnar connecting piece is smaller than the size of the button cap, the columnar connecting piece is arranged at the center of the bottom of the button cap, and the columnar connecting piece comprises two clamping plates oppositely arranged, and a clamping convex is arranged on the outer side wall near the bottom of the clamping plate.

[0012] Further, the clamping convex is away from the surface of the button cap to form a mounting inclined surface.

[0013] Further, the button cap comprises a pressing plate and a row of convex eaves arranged on the outer edge of the pressing plate, the lower surface of the pressing plate is provided with the columnar connecting piece, the shape and size of the convex eaves correspond to and are adapted to the shape and size of the installation groove, the button cap can move downward relative to the groove wall of the installation groove under the action of external pressure, and then the protrusion below the elastic pad drives the switch contact to exert pressure.

[0014] Further, the waterproof convex edge is located below the button cap, the convex eaves are arranged above and below the waterproof convex edge, and the height of the waterproof convex edge is smaller than the height of the columnar connecting piece.

[0015] Further, the clamping groove is a groove formed on the inner wall of the waterproof convex edge, the clamping groove can be adapted to the clamping convex, and the columnar connecting piece can move downward relative to the clamping groove under the action of external pressure.

[0016] Further, the back-shaped groove can collect water droplets from the joint gap between the key cap and the mounting groove, the mounting groove is provided with a drain hole on the groove wall next to the groove bottom, the drain hole is communicated with the flow guide channel, the flow guide channel is arranged obliquely, and the horizontal height of the drain hole is higher than the horizontal height of the water outlet end of the flow guide channel.

[0017] Further, the bottom of the back-shaped groove is provided with a slope for drainage, and the lowest part of the bottom of the back-shaped groove is provided with a drain hole communicated with the flow guide channel, the flow guide channel is arranged obliquely, and the horizontal height of the drain hole is higher than the horizontal height of the water outlet end of the flow guide channel.

[0018] In another aspect, the application provides an electronic sphygmomanometer, comprising a sphygmomanometer front shell and a sphygmomanometer rear shell clamped in position with the sphygmomanometer front shell, a sealing ring is arranged at the joint of the sphygmomanometer front shell and the sphygmomanometer rear shell; a display screen mounting hole is formed on the sphygmomanometer front shell, a touch screen is arranged at the display screen mounting hole, and a display screen is arranged at the back of the touch screen; one or more keys are arranged on the sphygmomanometer front shell, and the keys adopt the waterproof key structure for the sphygmomanometer.

[0019] In the above technical solution, further, the sphygmomanometer front shell and the sphygmomanometer rear shell enclose an electrical compartment for accommodating a gas pump, a gas circuit assembly, a pressure sensor, a control circuit board, a power module and a switch circuit board; the control circuit board is integrated with a microprocessor and a memory, the microprocessor is used to receive and process pressure signals collected by the pressure sensor and output the processed signals to the display screen for display, and the memory is used to store the signals processed by the microprocessor; the power module comprises a battery module and a charging interface connected with the battery module; the switch circuit board is provided with a switch contact, the microprocessor can obtain a trigger signal of the switch contact, and then send an instruction signal to the gas pump according to the trigger signal, the gas pump inflates and deflates the cuff according to the instruction signal; a cuff connecting hole is formed on the side wall of the electrical compartment, the cuff connecting hole is connected with the gas pump through the gas circuit assembly, and the cuff connecting hole is used to connect the cuff; a scanner is arranged in the electrical compartment, a scanning head of the scanner is mounted on the sphygmomanometer rear shell, and the scanner is connected with the microprocessor.

[0020] Further, a placement plane and a concave arc surface connected with the placement plane are formed on the sphygmomanometer rear shell, a handle is arranged on the concave arc surface, a storage space for accommodating the cuff is formed between the handle and the concave arc surface; a plurality of rubber pads are arranged at the bottom of the placement plane, and the electronic sphygmomanometer is stably placed on a placement platform through the placement plane.

[0021] Compared with the prior art, the application has at least the following beneficial effects:

[0022] 1、The present application is based on further analysis and research on the problems of the prior art, and it is found that the sealing ring at the key of the existing blood pressure meter is prone to aging and failure, resulting in insufficient waterproof performance of the key. Therefore, the present application provides a waterproof key structure for a blood pressure meter. The device is actively drained through the water blocking convex edge, the back-shaped groove and the flow guide channel. The water blocking convex edge formed around the cylindrical connecting piece of the key body can block the direct penetration of external liquid into the interior. The back-shaped groove surrounded by the water blocking convex edge, the mounting groove wall and the groove bottom can temporarily store a small amount of penetrated liquid, and the accumulated liquid can be guided out through the flow guide channel, avoiding the retention of liquid to cause the internal circuit to be damp. In addition, the elastic pad arranged at the bottom of the mounting groove and abutting against the cylindrical connecting piece of the key body has the functions of elastic pressing, sealing and triggering, which can improve the pressing feeling of the key and the operation comfort. Furthermore, the circuit board switch is directly triggered by the protrusion below the elastic pad, without the need to open a hole on the key structure, which can further avoid the penetration of liquid along the key structure into the circuit and improve the waterproof performance of the key structure. In addition, the key body and the front shell of the blood pressure meter are mechanically limited and connected through the limiting installation buckle and the clamping groove, which has strong structural durability, and the buckle fixing method can enable the key body to be independently disassembled, facilitating maintenance or replacement, while not affecting the waterproof structure.

[0023] 2、The key cap eaves and the water blocking convex edge are arranged in a staggered manner in the present application to form a three-dimensional maze waterproof structure. The liquid needs to flow through the lower edge of the eaves first, and then change direction along the groove bottom to the water blocking convex edge, thereby prolonging the liquid penetration path and significantly improving the anti-leakage capability. In addition, the staggered design breaks the continuous attachment surface of the liquid, preventing water droplets from penetrating along the vertical gap. In particular, the blood pressure meter directly contacts liquid during disinfection and wiping, and the above-mentioned staggered structure design can block the penetration of alcohol or disinfectant.

[0024] 3、The height of the water blocking convex edge is lower than that of the cylindrical connecting piece in the present application, ensuring that the key cap and the water blocking convex edge are not in contact when the key is not pressed, and the cylindrical connecting piece compresses the elastic pad first when pressed, and the water blocking convex edge does not participate in the key stroke, avoiding deformation and failure of the convex edge caused by repeated friction.

[0025] 4、The blood pressure meter using the waterproof key structure provided by the present application can actively drain the device through the water blocking convex edge, the back-shaped groove and the flow guide channel, form a three-dimensional maze seal through the staggered design of the eaves and the water blocking convex edge, realize gravity self-drainage through the back-shaped groove with slope and the inclined flow guide channel, and realize simple disassembly of the key body through the buckle and clamping groove design, thereby improving the overall waterproof performance of the blood pressure meter. In addition, the elastic pad arranged at the bottom of the mounting groove and abutting against the cylindrical connecting piece of the key body improves the pressing feeling of the key and the operation comfort. BRIEF DESCRIPTION OF DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application. For example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, and size ratios of certain units (components).

[0027] Figure 1 This is a three-dimensional structural diagram of the blood pressure monitor provided in this application from a first perspective in one embodiment.

[0028] Figure 2 This is a side view of the blood pressure monitor provided in this application in one embodiment;

[0029] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along section AA;

[0030] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point I;

[0031] Figure 5 for Figure 1 A front view schematic diagram of the front casing of a medium blood pressure monitor;

[0032] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along section BB;

[0033] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point II;

[0034] Figure 8 This is a three-dimensional structural diagram of the blood pressure monitor provided in this application from a second perspective in one embodiment.

[0035] Figure 9 This is a three-dimensional structural diagram of the blood pressure monitor provided in this application from a third perspective in one embodiment.

[0036] Figure 10 This is a three-dimensional structural diagram of the blood pressure monitor provided in this application from a fourth perspective in one embodiment.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1, key; 11, key cap; 111, convex eaves; 12, cylindrical connecting piece; 121, clamping plate; 122, clamping convex;

[0039] 2, sphygmomanometer front shell; 21, water-blocking convex edge; 22, back-shaped groove; 23, water flow channel;

[0040] 3, touch screen;

[0041] 4, elastic pad;

[0042] 5, sphygmomanometer rear shell; 51, cuff connecting hole; 52, scanning head; 53, handle; 54, rubber pad. DETAILED DESCRIPTION

[0043] The application will be further described in detail below with reference to the accompanying drawings.

[0044] In the description of the application: unless otherwise specified, the meaning of "multiple" is two or more. The terms "include", "contain", "have" and the like in the application also mean "not limited to" (some units, components, materials, steps, etc.).

[0045] The terms such as "up", "down", "left", "right", "middle" and the like referred to in the application are generally used for intuitive understanding with reference to the drawings, and are not absolute limitations on the positional relationship in the actual product. Changes in these relative positional relationships are also considered within the scope of the application.

[0046] With the improvement of medical level, medical institutions and family users have clear requirements for the waterproof performance of sphygmomanometers: 1. It needs to meet the IPX7 waterproof standard; 2. It is suitable for use in high-humidity environments such as washing hands and showering; 3. It takes into account waterproof performance and operation comfort.

[0047] In order to meet the user's requirements for the waterproof performance of the sphygmomanometer, the inventor has studied the physical keys of the traditional electronic sphygmomanometer and found that they generally have the following defects: 1. Insufficient waterproof performance: there is an assembly gap between the key and the shell, and water droplets or water vapor can easily penetrate into the device through the gap, causing circuit board short circuit or key failure; 2. The conventional rubber sealing ring is prone to aging and deformation after long-term pressing, losing its sealing function; 3. Lack of drainage capacity: water seeping into the key area is difficult to drain, which can easily cause water accumulation and cause failure.

[0048] To this end, the inventor proposes a new solution, i.e. a waterproof key structure for a sphygmomanometer and an electronic sphygmomanometer. The waterproof function of the key area is improved by structure design, application of high-performance materials and sealing process, and the reliability of the equipment in a humid environment or accidental splashing scene is improved. The specific structure and function of the waterproof key structure and the electronic sphygmomanometer provided by the present application will be described in detail below through specific embodiments.

[0049] Embodiment one

[0050] The waterproof key structure for a sphygmomanometer provided by the present application is mainly applied to the keys arranged on the upper surface of the front shell of the sphygmomanometer.

[0051] Referring to Figure 3 , 4 , the waterproof key structure mainly comprises a key body and a sphygmomanometer front shell 2 for installing the key body; wherein: the key body comprises a key cap 11 and a columnar connecting piece 12 connected below the key cap 11, and two limiting installation buckles are oppositely arranged on the side wall near the bottom of the columnar connecting piece 12, such as Figure 7 ; the sphygmomanometer front shell 2 is provided with an installation groove matched with the key cap 11, a through hole allowing the columnar connecting piece 12 to pass through is formed in the groove bottom, a water retaining convex edge 21 is arranged on the upper edge of the through hole along the groove bottom, a clamping groove matched with the limiting installation buckle is arranged on the inner wall of the water retaining convex edge 21, the water retaining convex edge 21 and the groove wall and the groove bottom of the installation groove form a U-shaped groove 22, a flow guide channel 23 communicating with the U-shaped groove 22 is formed in the sphygmomanometer front shell 2, and the water outlet end of the flow guide channel 23 is arranged on the outer wall of the sphygmomanometer front shell 2; the lower surface of the key cap 11 and the top of the water retaining convex edge 21 are provided with a gap, the outer edge of the key cap 11 is slidably connected with the groove wall of the installation groove, the lower surface of the elastic pad 4 is provided with a protrusion for triggering the switch contact, the columnar connecting piece 12 abuts against the elastic pad 4 through the through hole, and the protrusion is located below the columnar connecting piece 12.

[0052] The waterproof key structure provided by the above technical solution realizes active drainage of the equipment through the water retaining convex edge 21, the U-shaped groove 22 and the flow guide channel 23, and improves the waterproof performance of the equipment. Specifically, the water retaining convex edge 21 formed around the columnar connecting piece 12 of the key body can block the direct penetration of external liquid into the interior, the U-shaped groove 22 formed by the water retaining convex edge 21, the groove wall and the groove bottom of the installation groove can temporarily store a small amount of penetrated liquid, and the accumulated liquid can be guided out through the flow guide channel 23, avoiding the retention of liquid to cause the internal circuit to be damp.

[0053] In addition, the outer edge of the key cap 11 is adapted to slide with the wall of the mounting groove, without affecting the pressing feeling of the key under the premise of ensuring the key pressing function, and the elastic pad 4 arranged at the bottom of the mounting groove and abutting against the columnar connecting piece 12 of the key body can be conductive rubber (a functional composite material made of uniformly mixed conductive filler in a rubber matrix, and the conductive filler can be carbon black, graphite, silver powder, copper powder, silver-coated glass beads, etc.), which has the functions of elastic pressing, sealing and triggering, and can improve the pressing feeling of the key and the operation comfort. In the embodiment, the conductive rubber adds 5% graphene, the contact resistance is less than 100 mΩ at -40°C, the content of carbon particles in the conductive rubber is 35%, and the thickness of the bottom bump of the conductive rubber is 1.5 mm.

[0054] Furthermore, the circuit board switch is directly triggered by the bump below the elastic pad 4, without the need to open a hole on the key structure, which can further avoid liquid from seeping into the circuit along the key structure and improve the waterproof performance of the key structure.

[0055] Therefore, the application realizes the active drainage design of multiple waterproof barriers through the water-blocking convex edge 21, the back-shaped groove 22 and the flow guide channel 23, instead of simply relying on sealing glue, which is more reliable in long-term use. Further, the slidingly fitted key cap 11 and elastic pad 4 design not only ensures waterproofness, but also maintains the sensitivity and rebound performance of the key. Furthermore, the key body and the sphygmomanometer front shell 2 are mechanically limited and connected through the limiting installation buckle and the clamping groove, which has strong structural durability, and the buckle fixing mode allows the key body to be independently detached for maintenance or replacement, without affecting the waterproof structure.

[0056] In a preferred embodiment, referring to Figure 7 , the size of the columnar connecting piece 12 is smaller than that of the key cap 11, the columnar connecting piece 12 is arranged at the bottom center of the key cap 11, and the columnar connecting piece 12 includes two oppositely arranged clamping plates 121, and the clamping plate 121 is provided with a clamping convex 122 on the outer side wall close to the bottom of the clamping plate 121, and the clamping plate 121 and the clamping convex 122 constitute the limiting installation buckle.

[0057] The above technical solution optimizes the structure of the columnar connecting piece 12, which is located at the bottom center of the key cap 11 and has a diameter or width significantly smaller than that of the key cap 11, forming a "T" shape or a "mushroom head" structure, which not only enhances the stability of the key structure, but also avoids liquid from seeping into the interior along the columnar connecting piece 12. In addition, the two opposite clamping plates 121 are symmetrically arranged on the columnar connecting piece 12, which facilitates the alignment of the key body with the mounting groove, and the "click" type clamping of the clamping convex 122 and the clamping groove realizes one-key assembly, and the two clamping plates 121 are symmetrically stressed, avoiding fatigue fracture of the single-sided buckle after long-term pressing. Furthermore, the surface of the clamping convex 122 away from the key cap 11 forms a mounting inclined surface, i.e., the clamping convex 122 is a kind of barb structure, as shown in Figure 7The barb structure can prevent the key from being loosened due to frequent pressing or vibration, and limit the lateral displacement of the columnar connecting piece 12 to ensure vertical movement when pressed. In addition, the clamping plate 121 passes through the through hole in the center of the water blocking convex edge 21, and after the clamping lug 122 is clamped into the clamping groove, the clamping plate 121 has a small gap with the inner wall of the through hole. Due to the presence of the water blocking convex edge 21, it is difficult for liquid to enter the interior of the device through the gap, while the gap allows a small amount of air to circulate, which can balance the air pressure changes when the key is pressed.

[0058] Therefore, the size design of the columnar connecting piece 12 and the key cap 11 in the present application can reduce the water infiltration path and improve the waterproof performance. The buckle type fixing method is more resistant to aging than screws or adhesion, and is convenient for disassembly and replacement of damaged keys.

[0059] In a preferred embodiment, the key cap 11 and the columnar connecting piece 12 can be integrally injection molded with PC material. The key cap 11 includes a pressing plate and a row of eaves 111 arranged on the outer edge of the pressing plate. The lower surface of the pressing plate is provided with the columnar connecting piece 12, and the shape and size of the eaves 111 correspond to and adapt to the shape and size of the mounting groove, respectively. The key cap 11 can be moved downward relative to the groove wall of the mounting groove under the action of external pressure, and then drive the protrusions below the elastic pad 4 to exert pressure on the switch contact through the columnar connecting piece 12.

[0060] The above technical solution optimizes the structural design of the key cap 11. Through the combination of the pressing plate and the eaves 111, the waterproofness, pressing feel and assembly reliability of the key are optimized. Specifically, when pressed, the eaves 111 slide vertically along the mounting groove wall to avoid lateral shaking, and the adaptive installation of the eaves 111 and the mounting groove wall also achieves the front and back, left and right limiting installation of the key body in the horizontal direction. In addition, the close cooperation of the eaves 111 and the mounting groove forms the first waterproof line, greatly reducing the possibility of liquid infiltration from the periphery of the key, and the design of the eaves 111 can ensure that the key body does not deviate when pressed, avoiding friction between the columnar connecting piece 12 and the side wall of the through hole, and protecting the sealing performance of the water blocking convex edge 21. Furthermore, the protrusions are directly located below the columnar connecting piece 12, shortening the force transmission path, and the deformation of the elastic pad 4 is concentrated in the protrusion area, improving the key sensitivity.

[0061] The top of the eaves 111 can be higher than the upper surface of the pressing plate. Specifically, the top of the eaves 111 is 0.2mm higher than the upper surface of the pressing plate, and the width of the eaves 111 is 0.3mm. The eaves 111 can form a peripheral waterproof rib of the key cap 11.

[0062] In a preferred embodiment, heating wires can also be added to the lower surface of the key cap 11 to automatically start micro-heating (35℃±2℃) in low temperature environment. A temperature sensor can be set in the sphygmomanometer and connected to the microprocessor in the sphygmomanometer. The microprocessor can obtain the signal of the temperature sensor in real time and compare the temperature signal with the preset minimum temperature. Once the ambient temperature is lower than the minimum temperature, the microprocessor can control the heating wires to start heating.

[0063] In a preferred embodiment, the water-blocking convex edge 21 is located below the key cap 11, and the convex eaves 111 are arranged in a staggered manner above and below the water-blocking convex edge 21. The height of the water-blocking convex edge 21 is less than the height of the columnar connecting piece 12, as shown in Figure 4 .

[0064] The above technical solution realizes a three-dimensional maze waterproof structure. Liquid needs to flow through the lower edge of the convex eaves 111 first, and then change direction to flow along the groove bottom of the meandering groove 22 to the water-blocking convex edge 21. The liquid penetration path is lengthened, and the anti-seepage capability is significantly improved. In addition, the staggered design destroys the continuous adhesion surface of the liquid, preventing water droplets from penetrating along the vertical gap. Furthermore, after the penetrated liquid is blocked in layers by the convex eaves 111 and the water-blocking convex edge 21, it can be quickly discharged along the flow guide channel 23 of the meandering groove 22. In addition, the height of the water-blocking convex edge 21 is lower than that of the columnar connecting piece 12, ensuring that the key cap 11 and the water-blocking convex edge 21 are not in contact when the key is not pressed, and the columnar connecting piece 12 is compressed first when the key is pressed, and the water-blocking convex edge 21 does not participate in the key stroke, avoiding repeated friction that causes deformation and failure of the convex edge. In particular, the sphygmomanometer directly contacts liquid during disinfection and wiping. The above staggered structure design can block the penetration of alcohol or disinfectant.

[0065] In a preferred embodiment, as shown in Figure 7 , the clamping groove is a groove opened on the inner wall of the water-blocking convex edge 21. The clamping groove can be adapted to the clamping convex 122 for clamping connection, and the columnar connecting piece 12 can be lowered relative to the clamping groove under external pressure. The sliding of the clamping convex 122 in the clamping groove maintains continuous contact pressure, which can compensate for structural wear caused by long-term use.

[0066] In a preferred embodiment, the meandering groove 22 can collect water droplets that penetrate from the connection gap between the key cap 11 and the mounting groove. A drain hole is opened on the groove wall next to the groove bottom of the mounting groove. The drain hole is in communication with the flow guide channel 23. The flow guide channel 23 is arranged obliquely. The horizontal height of the drain hole is higher than the horizontal height of the water outlet end of the flow guide channel 23, as shown in Figure 4 . The drain hole is arranged at the bottom of the mounting groove, which can form a liquid level difference with the meandering groove 22. The penetrated liquid naturally flows out along the inclined flow guide channel 23 under the action of gravity. In addition, the oblique arrangement of the flow guide channel 23 can make it difficult for liquid to flow back while allowing external airflow to enter.

[0067] In another preferred embodiment, the groove bottom of the U-shaped groove 22 is formed with a slope to facilitate drainage, and a drainage hole is formed at the lowest part of the groove bottom of the U-shaped groove 22, which is in communication with the flow guide channel 23. The flow guide channel 23 is arranged obliquely, and the horizontal height of the drainage hole is higher than the horizontal height of the water outlet end of the flow guide channel 23. By arranging a slope (15°) on the groove bottom of the U-shaped groove 22 and forming a drainage hole (1.2 mm in diameter, which can be internally provided with a waterproof and breathable membrane made of ePTFE material, such as a waterproof membrane of GORE-TEX® of Gore Company with a pore size of 0.2 μm, and o is attached to the inner side of the drainage hole, which can drain water and prevent dust) at the lowest part, the water flowing into the U-shaped groove 22 can be guided to the drainage hole and naturally discharged through the inclined flow guide channel 23, avoiding the accumulation of liquid in the U-shaped groove 22, reducing the residual amount of liquid in the U-shaped groove 22, and further providing a hydrophobic layer on the groove bottom of the U-shaped groove 22.

[0068] The groove bottom of the U-shaped groove 22 described above can be provided with a plurality of radial microgrooves, each with a depth of 0.3 mm and a width of 0.5 mm, to form a capillary effect to accelerate drainage.

[0069] In summary, the waterproof key structure for a sphygmomanometer provided by the present application actively drains water from the device through the water-blocking convex edge 21, the U-shaped groove 22, and the flow guide channel 23, forms a three-dimensional maze seal through the staggered design of the convex eaves 111 and the water-blocking convex edge 21, realizes gravity self-drainage through the U-shaped groove 22 with a slope and the inclined flow guide channel 23, and realizes simple disassembly and assembly of the key body through the buckle and slot design, thereby improving the waterproof performance of the sphygmomanometer as a whole. In addition, the elastic pad 4 provided at the bottom of the mounting groove and abutting against the columnar connecting piece 12 of the key body improves the pressing feeling of the key and improves the operation comfort. Therefore, the waterproof key structure provided by the present application can solve the problems of poor waterproof effect of the key of the conventional sphygmomanometer, easy aging and failure of the sealing ring, and difficult drainage of water.

[0070] Embodiment Two

[0071] Based on the waterproof key structure for a sphygmomanometer provided in Embodiment One, the present embodiment provides an electronic sphygmomanometer. Referring to Figure 1 , the electronic sphygmomanometer is provided with a key 1 on the sphygmomanometer front shell 2, and the key adopts the waterproof key structure for a sphygmomanometer provided in Embodiment One.

[0072] Referring to Figure 2 , the electronic sphygmomanometer provided in the present embodiment mainly includes a sphygmomanometer front shell 2 and a sphygmomanometer rear shell 5 which is in abutting connection with the sphygmomanometer front shell 2, and a sealing ring is arranged at the connection between the sphygmomanometer front shell 2 and the sphygmomanometer rear shell 5.

[0073] Referring to Figure 3The display screen mounting hole is provided on the front shell 2 of the sphygmomanometer, and the touch screen 3 is attached at the display screen mounting hole. The back of the touch screen 3 is provided with a display screen. That is, the sealing between the touch screen 3 and the front shell 2 of the sphygmomanometer in the present application is achieved by adhesive, such as double-sided tape or liquid adhesive (such as silicone, epoxy resin, polyurethane or UV adhesive, etc.). Of course, hot melt sealing can also be used, that is, the plastic shell and the display screen frame are fused by heating or ultrasonic welding. If the ultrasonic welding method is used for connection and sealing, the welding energy is 3000J, and the melting depth is 0.8mm, so as to ensure the overall sealing of the shell.

[0074] The front shell 2 and the rear shell 5 of the sphygmomanometer form an electrical compartment for accommodating the air pump, the air path assembly, the pressure sensor, the control circuit board, the power module and the switch circuit board. The control circuit board is integrated with a microprocessor and a memory. The microprocessor is used to receive and process the pressure signal collected by the pressure sensor and output it to the display screen for display. The memory is used to store the signal processed by the microprocessor. The power module includes a battery module (such as a lithium battery) and a charging interface connected to the battery module. The switch circuit board is provided with a switch contact. The microprocessor can obtain a trigger signal of the switch contact, and then send an instruction signal to the air pump according to the trigger signal. The air pump inflates and deflates the cuff according to the instruction signal. Referring to Figure 8 A cuff connecting hole 51 is formed in the side wall of the electrical compartment. The cuff connecting hole 51 is connected to the air pump through the air path assembly, and is used to connect the cuff.

[0075] It should be noted that the specific composition and structural design of the air path assembly, the control circuit board, the power module and the switch circuit board in the sphygmomanometer are relatively mature technologies on the market, and the present application does not make detailed introduction.

[0076] In addition, the Internet of Things module and data analysis algorithm can be added to the electronic sphygmomanometer provided in the present application to make it have data storage / analysis / sharing function, so as to obtain a smart sphygmomanometer. The implementation architecture of the smart sphygmomanometer is the prior art in the field, such as the Omron HEM-7361T smart sphygmomanometer and the iHealth BP7 smart sphygmomanometer on the market. Therefore, in the specific production process, the corresponding Internet of Things module and data analysis algorithm can be expanded on the basis of the structure of the electronic sphygmomanometer provided in the present application to meet the smart demand of users for the sphygmomanometer.

[0077] The scanner is provided in the electrical compartment, and the scanning head 52 of the scanner is installed on the rear shell 5 of the sphygmomanometer, as shown in Figure 9The scanner can be connected to the microprocessor signal. When in use, the patient information can be obtained by scanning the bar code on the wristband of the inpatient through the scanning head 52, and then the measured blood pressure data result is synchronized to the patient information. The sphygmomanometer can record the specific time of measuring blood pressure and the specific blood pressure measurement value and other information.

[0078] In the embodiment, the rear shell 5 of the sphygmomanometer is formed with a placement plane and a concave arc surface connected to the placement plane, and the concave arc surface is provided with a handle 53. The handle 53 and the concave arc surface form a storage space for accommodating the cuff.

[0079] In the embodiment, referring to Figure 10 , the bottom of the placement plane of the rear shell 5 of the sphygmomanometer is provided with a plurality of rubber pads 54, and the electronic sphygmomanometer is stably placed on the placement platform through the placement plane.

[0080] In the application, the front shell 2 and the rear shell 5 of the sphygmomanometer can be made of PC+ABS composite material.

[0081] The performance comparison table obtained by comparing the performance of the sphygmomanometer with the waterproof key structure provided in the application with the performance of the traditional sphygmomanometer on the market is as follows:

[0082]

[0083] In summary, the sphygmomanometer with the waterproof key structure provided in the application can adapt to humid environments or accidental splashing scenes, has excellent waterproof performance, good structural sealing and reliability, can not only achieve IPX7 level waterproof in the key area, but also can maintain sensitive key touch, and prolong the service life of the equipment.

[0084] The technical features of the above embodiments can be combined in any manner (as long as the combination of the technical features does not exist contradictions). In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described. These embodiments not explicitly written should be considered as the scope of the present application.

[0085] The application is described in detail above through general description and specific embodiments. It should be understood that, based on the technical concept of the application, some conventional adjustments or further innovations can be made to these specific embodiments; however, as long as these conventional adjustments or further innovations do not deviate from the technical concept of the application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the application.

Claims

1. A waterproof button structure for a blood pressure monitor, characterized in that, The device includes a button body and a front housing of a blood pressure monitor for mounting the button body. The button body includes a button cap and a columnar connector connected below the button cap. Two limiting mounting buckles are oppositely arranged on the side wall of the columnar connector near its bottom. The front housing of the blood pressure monitor has a mounting groove adapted to the button cap. The bottom of the mounting groove has a through hole allowing the columnar connector to pass through. A water-retaining protrusion is provided along the upper edge of the through hole at the bottom of the groove. The inner wall of the water-retaining protrusion is provided with... The limiting mounting buckle is adapted to engage with the slot. The water-blocking protrusion, the wall of the mounting groove, and the bottom of the groove form a U-shaped groove. A flow guide channel communicating with the U-shaped groove is opened inside the front shell of the blood pressure monitor. The water outlet of the flow guide channel is located on the outer wall of the front shell of the blood pressure monitor. A gap is provided between the lower surface of the button cap and the top of the water-blocking protrusion. The outer edge of the button cap is adapted to slide and connect with the wall of the mounting groove. An elastic pad is installed on the lower surface of the mounting groove. The lower surface of the elastic pad is provided with a switch contact for triggering. The button cap has a protrusion, and the columnar connector passes through the through hole and abuts against the elastic pad. The protrusion is located below the columnar connector. The U-shaped groove can collect water droplets that seep into the connection gap between the button cap and the mounting groove. The mounting groove has a drain hole on its wall next to the bottom of the groove. The drain hole is connected to the flow channel. The flow channel is arranged at an angle, and the horizontal height of the drain hole is higher than the horizontal height of the water outlet end of the flow channel. The button cap includes a pressing plate and a ring of protrusions on the outer edge of the pressing plate. The columnar connector is provided on the lower surface of the pressing plate. The shape and size of the protrusions are adapted to the shape and size of the mounting groove. The button cap can move downward relative to the groove wall of the mounting groove under external pressure, and then drive the protrusion under the elastic pad to apply pressure to the switch contact through the columnar connector. The water-blocking protrusion is located below the button cap. The protrusions and the water-blocking protrusion are staggered vertically. The height of the water-blocking protrusion is less than the height of the columnar connector.

2. The waterproof button structure for a blood pressure monitor according to claim 1, characterized in that, The columnar connector is smaller than the keycap. The columnar connector is located at the bottom center of the keycap. The columnar connector includes two oppositely arranged snap-fit ​​plates. A snap-fit ​​protrusion is provided on the outer side wall of the snap-fit ​​plate near its bottom. The snap-fit ​​plate and the snap-fit ​​protrusion constitute the limiting installation buckle. The card protrusion forms an installation slope away from the surface of the button cap.

3. The waterproof button structure for a blood pressure monitor according to claim 2, characterized in that, The slot is a groove formed on the inner wall of the water-blocking protrusion. The slot can be adapted to engage with the protrusion. The columnar connector can move downward relative to the slot under external pressure.

4. The waterproof button structure for a blood pressure monitor according to claim 1, characterized in that, The bottom of the U-shaped trough forms a slope that facilitates drainage. A drainage hole is opened at the lowest point of the bottom of the U-shaped trough. The drainage hole is connected to the flow guide channel. The flow guide channel is arranged at an angle, and the horizontal height of the drainage hole is higher than the horizontal height of the water outlet end of the flow guide channel.

5. An electronic blood pressure monitor, characterized in that, The device includes a front housing of a blood pressure monitor and a rear housing of a blood pressure monitor that is aligned and snapped together with the front housing. A sealing ring is provided at the connection between the front housing and the rear housing of the blood pressure monitor. The blood pressure monitor has a display screen mounting hole on its front housing, a touch screen is attached to the display screen mounting hole, and a display screen is located on the back of the touch screen; The blood pressure monitor has one or more buttons on its front housing, and the buttons adopt the waterproof button structure for blood pressure monitors as described in any one of claims 1-4.

6. The electronic blood pressure monitor according to claim 5, characterized in that, The front and rear housings of the blood pressure monitor form an electrical compartment for housing the air pump, air circuit components, pressure sensor, control circuit board, power module, and switch circuit board. The control circuit board integrates a microprocessor and a memory. The microprocessor is used to receive the pressure signal collected by the pressure sensor, process it, and output it to the display screen for display. The memory is used to store the signal processed by the microprocessor. The power module includes a battery module and a charging interface connected to the battery module; The switch circuit board is provided with switch contacts. The microprocessor can obtain the trigger signal of the switch contacts and then send a command signal to the air pump according to the trigger signal. The air pump inflates and deflates the cuff according to the command signal. The side wall of the electrical compartment has a cuff connection hole, which is connected to the air pump through the air circuit assembly. The cuff connection hole is used to insert a cuff. The electrical compartment is equipped with a scanner, the scanner head of which is mounted on the back of the blood pressure monitor, and the scanner is connected to the microprocessor via signals.

7. The electronic blood pressure monitor according to claim 5, characterized in that, The back cover of the blood pressure monitor has a placement plane and a concave arc surface connected to the placement plane. A handle is provided on the concave arc surface, and a storage space for storing the cuff is formed between the handle and the concave arc surface. The bottom of the placement plane is provided with multiple rubber pads, and the electronic blood pressure monitor is stably placed on the platform through the placement plane.

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