Waterproof key structure for sphygmomanometer and electronic sphygmomanometer

Abstract

The invention discloses a waterproof key structure for a sphygmomanometer and an electronic sphygmomanometer, 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 matched mounting groove, a water retaining convex edge is arranged in the mounting groove, and the waterproof convex edge is connected with the columnar connecting piece. The columnar connecting piece penetrates through a middle through hole of the water retaining convex edge to abut against the elastic cushion, a limiting buckle of the columnar connecting piece is clamped with a buckle on the inner wall of the water retaining convex edge in a matched mode, the water retaining convex edge and the groove bottom and the groove wall of the mounting groove define a concentric-square-shaped groove, and the concentric-square-shaped groove is connected with the flow guide channel to achieve active drainage; besides, the key cap is in sliding fit with the mounting groove, and after the key body is pressed, a columnar connecting piece is matched with an elastic cushion with a triggering convex block to realize a pressing springback action, so that the structural sealing performance and the operation hand feeling are ensured; therefore, the sphygmomanometer adopting the waterproof key structure provided by the invention has better waterproof performance and comfortable operation hand feeling.

Description

Technical Field

[0001] The present application relates to the technical field of medical auxiliary equipment, and in particular to a blood pressure monitor that can be used in surgical diagnosis, and specifically to a waterproof button structure that can improve the waterproof effect of the blood pressure monitor and an electronic blood pressure monitor using the waterproof button structure. Background Art

[0002] A sphygmomanometer is a medical device used to measure blood pressure, and its on / off button is a key component. Existing electronic sphygmomanometers are categorized by button type as either mechanical or touchscreen. Compared to mechanical buttons, touchscreen buttons lack a firm feel and feedback, resulting in a poor user experience. Mechanical buttons, on the other hand, offer a more realistic, mechanical feel, which is more in line with popular operating habits.

[0003] However, as a device with a cover assembly, a mechanical button-type electronic blood pressure monitor usually has buttons on the upper cover. The device is operated by pressing the buttons. To facilitate smooth button pressing and reduce friction during the lifting and lowering process, an assembly gap is provided between the upper cover and the buttons. The structural seal of this assembly gap is often made of a rubber sealing ring. However, after long-term pressing of the button, the rubber sealing ring is prone to aging and deformation, resulting in failure of the sealing structure. This makes it easy for water droplets or water vapor to penetrate into the device through the gap in a humid environment. During daily use, if water splashes onto the upper cover, the water will flow into the device through the gap between the upper cover and the buttons. The device usually has electronic components such as solenoid valves and circuit boards inside. This can cause damage or short circuits to the internal components of the device, greatly shortening the service life of the electronic blood pressure monitor.

[0004] To address the aforementioned issue of seal failure and the resulting insufficient waterproofing of the keypad, the traditional solution is to increase the seal strength, but this results in a stiff feel and compromised operational sensitivity. Chinese invention patent CN202310760433.6, which discloses a cover assembly, a device having the cover assembly, and a sphygmomanometer, proposes a targeted solution. The waterproofing mechanism of this solution is as follows: First, a raised annular connection structure on the cover acts as a "wall," initially blocking most splashing water. Second, the first connection portion of the flexible silicone seal tightly fits against the outer wall of the connection structure with an interference fit, forming a 360-degree radial seal. The second connection portion consistently mates with the end face of the keypad, forming an end-face seal. This prevents any water from entering through the keypad gap from seeping into the internal circuitry. Third, an annular groove on one side of the seal temporarily "stores" any intruding water, reducing instantaneous water pressure. Furthermore, a thin, inclined third connection portion preferentially deforms elastically when the keypad is pressed, ensuring triggering without compromising the seal.

[0005] Although the technical solution disclosed in the above document can isolate water entering through the gap from outside the housing by means of the raised annular connection structure on the cover and the flexible silicone seal adapted thereto, it still has the following defects in specific applications:

[0006] First, the flexible silicone seal is made of silicone / rubber. Long-term contact with alcohol, chlorine-containing disinfectants, or ultraviolet rays in hospitals and clinics will accelerate hardening and cracking, lose the interference fit, and lead to a decrease in the waterproof rating. Second, the elastic modulus of the flexible silicone seal increases with aging, and medical staff will notice that the "keys have become harder," requiring greater pressure, which may affect quick one-handed operation and even induce false touches or repeated triggering. Third, the annular connection structure and the flexible silicone seal use an interference fit, which requires high dimensional processing accuracy. Excessive interference fit can cause the keys to stick, while insufficient interference fit can cause water seepage, resulting in high processing requirements and costs. Third, the sealing structure and the cover are tightly fitted, and the silicone ring is easily torn when the cover is removed for maintenance or calibration. After reinstallation, the original waterproof rating cannot be maintained, and the entire cover assembly must be replaced, increasing maintenance costs. Finally, in high-altitude, low-pressure environments or high-temperature, high-humidity surgical environments, the silicone absorbs moisture and expands, which may cause excessive deformation of the third connection, resulting in "self-triggering" or "key failure", which interferes with the operation of the blood pressure monitor.

[0007] It can be seen that the technical solution provided by the above patent document still has limitations. Therefore, the problem of sealing failure and insufficient waterproofing caused by aging of the above sealing ring has not been well solved. Therefore, it is necessary to propose a new technical solution to solve the above problem. Summary of the Invention

[0008] The present application provides a waterproof button structure for a blood pressure monitor and an electronic blood pressure monitor, which are used to solve the problem that the sealing ring of the button of the existing blood pressure monitor ages, resulting in insufficient waterproof performance of the button and thus affecting the service life of the blood pressure monitor.

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

[0010] On the one hand, the present application provides a waterproof button structure for a blood pressure monitor, which includes a button body and a front shell of the blood pressure monitor for installing the button body; the button body includes a button cap and a columnar connecting member connected to the bottom of the button cap, and two limit mounting clips are relatively provided on the side wall of the columnar connecting member near its bottom; a mounting groove adapted to the button cap is provided on the front shell of the blood pressure monitor, and a through hole is provided at the bottom of the mounting groove to allow the columnar connecting member to pass through, and a circle of water-retaining convex edge is provided on the bottom of the groove along the upper edge of the through hole, and a water-retaining convex edge is provided on the inner wall of the water-retaining convex edge adapted to the limit mounting clip A card slot is provided, the water-retaining convex edge and the groove wall and groove bottom of the installation groove form a circular groove, a diversion channel connected to the circular groove is opened in the front shell of the sphygmomanometer, and the water outlet end of the diversion channel is arranged on the outer wall of the front shell of the sphygmomanometer; a gap is provided between the lower surface of the button cap and the top of the water-retaining convex edge, the outer edge of the button cap is adapted to slide with the groove wall of the installation groove, an elastic pad is installed on the lower surface of the installation groove, and a protrusion is provided on the lower surface of the elastic pad for triggering the switch contact, the columnar connecting piece passes through the through hole and abuts against the elastic pad, and the protrusion is located below the columnar connecting piece.

[0011] Furthermore, in the above technical solution, the size of the columnar connecting member is smaller than the size of the button cap, and the columnar connecting member is arranged at the bottom center of the button cap. The columnar connecting member includes two relatively arranged clamping plates, and the outer side wall of the clamping plate near the bottom is provided with a clamping protrusion, and the clamping plate and the clamping protrusion constitute the limiting mounting buckle.

[0012] Furthermore, the surface of the locking protrusion facing away from the button cap forms a mounting inclined surface.

[0013] Furthermore, the button cap includes a pressing plate and a circle of convex eaves arranged on the outer edge of the pressing plate. The columnar connecting member is provided on the lower surface of the pressing plate. The shape and size of the convex eaves are respectively 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 the action of external pressure, and then drive the protrusion under the elastic pad to apply pressure to the switch contact through the columnar connecting member.

[0014] Furthermore, the water retaining convex edge is located below the button cap, the convex eave and the water retaining convex edge are staggered up and down, and the height of the water retaining convex edge is less than the height of the columnar connecting member.

[0015] Furthermore, the slot is a groove provided on the inner wall of the water retaining convex edge, the slot can be adapted to engage with the convex edge, and the columnar connecting member can move downward relative to the slot under the action of external pressure.

[0016] Furthermore, the circular groove can collect water droplets that seep into the connection gap between the button cap and the mounting groove. A drainage hole is provided on the groove wall close to the bottom of the mounting groove. The drainage hole is connected to the diversion channel. The diversion 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 diversion channel.

[0017] Furthermore, the bottom of the meandering groove forms a slope that is conducive to drainage, and a drainage hole is opened at the lowest point of the bottom of the meandering groove. The drainage hole is connected to the diversion channel, and the diversion channel is arranged at an angle. The horizontal height of the drainage hole is higher than the horizontal height of the water outlet end of the diversion channel.

[0018] On the other hand, the present application provides an electronic blood pressure monitor, comprising a front shell of the blood pressure monitor and a rear shell of the blood pressure monitor aligned with the front shell of the blood pressure monitor, a sealing ring being provided at the connection between the front shell and the rear shell of the blood pressure monitor; a display screen mounting hole being provided on the front shell of the blood pressure monitor, a touch screen being bonded to the display screen mounting hole, and a display screen being provided on the back of the touch screen; one or more buttons being provided on the front shell of the blood pressure monitor, the buttons adopting the above-mentioned waterproof button structure for the blood pressure monitor.

[0019] Furthermore, in the above technical solution, the front shell and the rear shell of the sphygmomanometer form an electrical compartment for accommodating an air pump, an air 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 the pressure signal collected by the pressure sensor and process it and output it to a display screen for display, and 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; a switch contact is provided on the switch circuit board, the microprocessor can obtain a trigger signal of the switch contact, and then send a command signal to the air pump according to the trigger signal, and the air pump inflates and deflates the cuff according to the command signal; a cuff connection hole is provided on the side wall of the electrical compartment, the cuff connection hole is connected to the air pump through the air circuit assembly, and the cuff connection hole is used to connect the cuff; a scanner is provided in the electrical compartment, the scanning head of the scanner is mounted on the rear shell of the sphygmomanometer, and the scanner is signal-connected to the microprocessor.

[0020] Furthermore, a placement plane and a concave arc surface connected to the placement plane are formed on the rear shell of the blood pressure monitor, a handle is provided on the concave arc surface, and a storage space for storing a cuff is formed between the handle and the concave arc surface; a plurality of rubber pads are provided at the bottom of the placement plane, and the electronic blood pressure monitor is stably placed on the storage platform through the placement plane.

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

[0022] 1. Based on further analysis and research on existing technical problems, this application recognizes that the sealing rings at the buttons of existing blood pressure monitors are prone to aging and failure, resulting in insufficient waterproof performance of the buttons. To this end, this application provides a waterproof button structure for a blood pressure monitor, which realizes active drainage of the equipment through a water-retaining convex edge, a circular groove and a diversion channel. A circle of water-retaining convex edges formed by the columnar connecting parts around the button body can prevent external liquid from directly penetrating into the interior. The circular groove formed by the water-retaining convex edge, the installation groove wall and the groove bottom can temporarily accumulate a small amount of infiltrated liquid, and the accumulated liquid can be discharged through the diversion channel to avoid liquid retention and damage to the internal circuit. Moisture; in addition, the elastic pad arranged at the bottom of the installation groove and abutting against the columnar connector of the button body has elastic pressing, sealing and triggering functions, which can enhance the pressing feel of the button and improve the operating comfort; furthermore, the circuit board switch is directly triggered by the bulge under the elastic pad, without the need to drill a hole in the button structure, which can further prevent liquid from penetrating into the circuit along the button structure and enhance the waterproof performance of the button structure; in addition, the button body and the front shell of the blood pressure monitor are mechanically limited and connected with the card slot through the limiting installation buckle, the structure has strong durability, and the buckle fixing method allows the button body to be independently disassembled, which is convenient for maintenance or replacement without affecting the waterproof structure.

[0023] 2. In the present application, the button cap convex eaves and the water retaining convex edge are staggered up and down to form a three-dimensional maze-like waterproof structure. The liquid must first flow through the lower edge of the convex eaves, and then change direction and flow along the bottom of the ring-shaped groove to the water retaining convex edge, thereby extending the liquid penetration path and significantly improving the anti-leakage ability; in addition, the staggered design destroys the continuous adhesion surface of the liquid to prevent water droplets from seeping in along the vertical gaps; in particular, the sphygmomanometer is in direct contact with the liquid during disinfection and wiping, and the above-mentioned staggered structure design can prevent alcohol or disinfectant from seeping in.

[0024] 3. In this application, the height of the water-retaining convex edge is lower than that of the columnar connector, ensuring that there is no contact between the key cap and the water-retaining convex edge when the key is not pressed. When pressed, the columnar connector preferentially compresses the elastic pad, and the water-retaining convex edge does not participate in the key stroke, avoiding repeated friction that causes the convex edge to deform and fail.

[0025] 4. The blood pressure monitor using the waterproof button structure provided by the present application can achieve active drainage of the equipment through the water-retaining convex edge, the circular groove and the diversion channel. A three-dimensional maze seal is formed by the staggered design of the convex eaves and the water-retaining convex edge. Gravity self-drainage is achieved through the sloped circular groove and the inclined diversion channel. The button body can be easily disassembled and assembled through the snap-on slot design, thereby improving the waterproof performance of the blood pressure monitor as a whole. In addition, the elastic pad that is arranged at the bottom of the installation groove and abuts against the columnar connector of the button body improves the pressing feel of the button and improves the operating comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive effort. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for the implementation of the present application. For example, based on the technical concepts and exemplary drawings disclosed in the present application, those skilled in the art are able to easily make routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, and dimensional ratios of certain units (components).

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the sphygmomanometer provided by the present application in one embodiment at a first viewing angle;

[0028] Figure 2 A schematic side view of the structure of a sphygmomanometer provided by the present application in one embodiment;

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

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

[0031] Figure 5 for Figure 1 A schematic diagram of the front structure of the middle blood pressure monitor;

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

[0033] Figure 7 for Figure 6 Schematic diagram of the local enlarged structure at point II;

[0034] Figure 8 This is a schematic diagram of the three-dimensional structure of the sphygmomanometer provided by the present application in one embodiment at a second viewing angle;

[0035] Figure 9 This is a schematic diagram of the three-dimensional structure of the sphygmomanometer provided by the present application in one embodiment at a third viewing angle;

[0036] Figure 10 This is a schematic diagram of the three-dimensional structure of the sphygmomanometer provided in this application in an embodiment at a fourth viewing angle.

[0037] Description of reference numerals:

[0038] 1. Button; 11. Button cap; 111. Protruding eaves; 12. Columnar connector; 121. Snap-on plate; 122. Snap-on protrusions;

[0039] 2. Front shell of sphygmomanometer; 21. Water retaining convex edge; 22. Round groove; 23. Diversion channel;

[0040] 3. Touch screen;

[0041] 4. Elastic pad;

[0042] 5. Back cover of blood pressure monitor; 51. Cuff connection hole; 52. Scanning head; 53. Handle; 54. Rubber pad. DETAILED DESCRIPTION

[0043] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0044] In the description of this application, unless otherwise specified, "plurality" means two or more. The terms "including," "comprising," "having," and the like in this application also mean "not limited to" (certain units, components, materials, steps, etc.).

[0045] Terms such as "upper," "lower," "left," "right," and "center" used in this application are generally intended to facilitate intuitive understanding when compared with the accompanying drawings and are not intended to be absolute limitations on positional relationships in actual products. Changes to these relative positional relationships are considered within the scope of this application without departing from the technical concepts disclosed herein.

[0046] With the improvement of medical standards, medical institutions and home users have put forward clear requirements for the waterproof performance of blood pressure monitors: 1. They must meet the IPX7 waterproof standard; 2. They must be suitable for use in high-humidity environments such as hand washing and showering; 3. They must take into account both waterproofness and operating comfort.

[0047] To meet users' requirements for waterproof performance of blood pressure monitors, the inventors studied the physical buttons of traditional electronic blood pressure monitors and found that they generally have the following defects: 1. Insufficient waterproof performance: There is an assembly gap between the button and the casing, and water droplets or water vapor can easily penetrate into the device through the gap, causing a short circuit in the circuit board or button failure; 2. Conventional rubber sealing rings are prone to aging and deformation after long-term pressing, losing their sealing function; 3. Lack of drainage ability: Water is difficult to drain after penetrating the button area, which can easily lead to moisture accumulation and cause failures.

[0048] To this end, the inventors have proposed a new solution, namely, a waterproof button structure for a blood pressure monitor and an electronic blood pressure monitor. This application improves the waterproof function of the button area through structural design, the application of high-performance materials, and a sealing process, thereby enhancing the reliability of the device in humid environments or accidental splashing scenarios. The specific structure and function of the waterproof button structure and electronic blood pressure monitor provided by this application are described in detail below through specific embodiments.

[0049] Example 1

[0050] The waterproof button structure for a blood pressure monitor provided in the present application is mainly used for buttons arranged on the upper surface of the front shell of the blood pressure monitor.

[0051] See also Figure 3 、 4 The waterproof key structure mainly includes a key body and a blood pressure monitor front shell 2 for mounting the key body; wherein: the key body includes a key cap 11 and a columnar connector 12 connected to the bottom of the key cap 11, and the columnar connector 12 is provided with two limit mounting buckles on the side wall near the bottom thereof, such as Figure 7 The sphygmomanometer front shell 2 is provided with a mounting groove adapted to the button cap 11, and a through hole is provided at the bottom of the mounting groove to allow the columnar connecting member 12 to pass through. A circle of water-retaining convex edge 21 is provided along the upper edge of the through hole at the bottom of the groove, and a card slot adapted to be engaged with the limit mounting buckle is provided on the inner wall of the water-retaining convex edge 21, and the groove wall and groove bottom of the mounting groove form a circular groove 22. A diversion channel 23 connected to the circular groove 22 is provided in the front shell 2 of the sphygmomanometer, and the water outlet end of the diversion channel 23 is provided at the outer wall of the front shell 2 of the sphygmomanometer; a gap is provided between the lower surface of the button cap 11 and the top of the water-retaining convex edge 21, and the outer edge of the button cap 11 is adapted to be slidably connected with the groove wall of the mounting groove. An elastic pad 4 is installed on the lower surface of the mounting groove, and the lower surface of the elastic pad 4 is provided with a protrusion for triggering the switch contact. The columnar connecting member 12 passes through the through hole and abuts against the elastic pad 4, and the protrusion is located below the columnar connecting member 12.

[0052] The waterproof key structure provided by the above technical solution achieves active drainage of the device through the water-retaining ridge 21, the circular groove 22, and the diversion channel 23, thereby improving the device's waterproof performance. Specifically, the water-retaining ridge 21 formed by the cylindrical connector 12 of the key body prevents external liquid from directly penetrating the interior. The circular groove 22, formed by the water-retaining ridge 21, the mounting groove wall, and the groove bottom, temporarily accumulates a small amount of seeping liquid. The accumulated liquid is then guided out through the diversion channel 23, preventing liquid retention and moisture from entering the internal circuitry.

[0053] Furthermore, the outer edge of the keycap 11 slides snugly against the wall of the mounting slot, ensuring the key's functionality without affecting the feel of the key. The elastic pad 4, located at the bottom of the mounting slot and abutting against the cylindrical connector 12 of the key body, can be made of conductive rubber (a functional composite material made by uniformly incorporating conductive fillers into a rubber matrix. The conductive fillers can be carbon black, graphite, silver powder, copper powder, silver-plated glass beads, etc.). It combines elastic pressing, sealing, and triggering functions, enhancing the key's feel and improving operational comfort. In this embodiment, the conductive rubber contains 5% graphene, resulting in a contact resistance of <100mΩ at -40°C. The carbon particle content of the conductive rubber is 35%, and the thickness of the bump at the bottom of the conductive rubber is 1.5mm.

[0054] Furthermore, the circuit board switch is directly triggered by the bump under the elastic pad 4 without opening a hole in the key structure, which can further prevent liquid from penetrating into the circuit along the key structure and improve the waterproof performance of the key structure.

[0055] Therefore, the present application realizes an active drainage design of multiple waterproof barriers through the water-retaining convex edge 21, the circular groove 22 and the diversion channel 23, rather than relying solely on sealant, which is more reliable for long-term use; furthermore, the sliding-fitting key cap 11 and the elastic pad 4 design not only ensure the waterproofness, but also maintain the sensitivity and rebound performance of the key; furthermore, the key body and the front shell 2 of the sphygmomanometer are mechanically limited and connected with the card slot through the limiting installation buckle, the structure has strong durability, and the buckle fixing method allows the key body to be disassembled independently, which is convenient for maintenance or replacement without affecting the waterproof structure.

[0056] In a preferred embodiment, see Figure 7 The size of the columnar connecting member 12 is smaller than that of the key cap 11. The columnar connecting member 12 is arranged at the bottom center of the key cap 11. The columnar connecting member 12 includes two relatively arranged clamping plates 121. The outer side wall of the clamping plate 121 near its bottom is provided with a clamping protrusion 122. The clamping plate 121 and the clamping protrusion 122 constitute a limiting installation buckle.

[0057] The above technical solution optimizes the structure of the columnar connector 12. The columnar connector 12 is located at the bottom center of the key cap 11. Its diameter or width is significantly smaller than that of the key cap 11, forming a "T" shape or a "mushroom head" structure. It not only enhances the stability of the key structure, but also prevents liquid from penetrating into the interior along the columnar connector 12. In addition, two opposing snap-in plates 121 are symmetrically arranged on the columnar connector 12, which facilitates the alignment of the key body with the mounting groove. The "click"-type snap connection between the snap-in protrusion 122 and the slot realizes one-button assembly, and the two snap-in plates 121 are symmetrically stressed, avoiding fatigue fracture of the single-sided buckle after long-term pressing. Furthermore, the surface of the snap-in protrusion 122 facing away from the key cap 11 forms a mounting slope, that is, the snap-in protrusion 122 is a barb structure, such as Figure 7This barb structure prevents the key from loosening due to frequent pressing or vibration, while also limiting the lateral displacement of the columnar connector 12, ensuring vertical movement when pressed. Furthermore, the clip plate 121 passes through the through-hole in the center of the water-retaining ridge 21. After the clip ridge 122 is engaged with the slot, a small gap exists between the clip plate 121 and the inner wall of the through-hole. Due to the presence of the water-retaining ridge 21, liquid is unlikely to enter the device through the gap. This gap, however, allows a small amount of air to circulate, balancing the air pressure changes when the key is pressed.

[0058] Therefore, the size design of the columnar connector 12 and the button cap 11 in this application can reduce the water seepage path and improve the waterproof performance. The snap-on fixing method is more resistant to aging than screws or glue, and is easy to disassemble and replace damaged buttons.

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

[0060] The above technical solution optimizes the structural design of the key cap 11, and optimizes the waterproofness, pressing feel and assembly reliability of the key through the combination of the pressing plate and the convex 111. Specifically, when pressed, the convex 111 slides vertically along the wall of the installation groove to avoid lateral shaking, and the adaptive installation of the convex 111 and the wall of the installation groove also realizes the limited installation of the key body in the horizontal direction. In addition, the close fit between the convex 111 and the installation groove forms the first waterproof line of defense, greatly reducing the possibility of liquid infiltration from all sides of the key, and the design of the convex 111 can ensure that the key body is not deflected when pressed, avoids friction between the columnar connector 12 and the side wall of the through hole, and protects the sealing of the water-retaining convex edge 21. Furthermore, the protrusion is directly located directly below the columnar connector 12, shortening the force transmission path, and the deformation of the elastic pad 4 is concentrated in the protrusion area, thereby improving the sensitivity of the key.

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

[0062] In a preferred specific embodiment, a heating wire can be added to the lower surface of the above-mentioned button cap 11 to automatically start micro-heating (35℃±2℃) in a low temperature environment. A temperature sensor can be set in the sphygmomanometer and connected to the microprocessor in the sphygmomanometer. The microprocessor obtains the signal of the temperature sensor in real time and compares the temperature signal with the preset minimum temperature. Once the ambient temperature is lower than the minimum temperature, the heating wire is controlled to start heating.

[0063] In a preferred embodiment, the water retaining convex edge 21 is located below the button cap 11, the convex eaves 111 and the water retaining convex edge 21 are staggered up and down, and the height of the water retaining convex edge 21 is less than the height of the columnar connecting member 12. Figure 4 .

[0064] The above technical solution realizes a three-dimensional labyrinth waterproof structure. The liquid must first flow through the lower edge of the convex eaves 111, and then change direction to flow along the bottom of the groove of the circular groove 22 to the water-retaining convex edge 21, which extends the liquid penetration path and significantly improves the anti-leakage ability. In addition, the staggered design destroys the continuous attachment surface of the liquid, preventing water droplets from seeping along the vertical gap. Furthermore, after the infiltrated liquid is blocked by the convex eaves 111 and the water-retaining convex edge 21 in layers, it can be discharged more quickly along the diversion channel 23 of the circular groove 22. In addition, the height of the water-retaining convex edge 21 is lower than the columnar connector 12, ensuring that the key cap 11 and the water-retaining convex edge 21 are not in contact when the key is not pressed. When pressed, the columnar connector 12 preferentially compresses the elastic pad 4, and the water-retaining convex edge 21 does not participate in the key stroke, avoiding repeated friction that causes the convex edge to deform and fail. In particular, the sphygmomanometer is in direct contact with the liquid during disinfection and wiping. The above-mentioned staggered structural design can prevent alcohol or disinfectant from seeping in.

[0065] In a preferred embodiment, Figure 7 The slot is a groove formed on the inner wall of the water retaining convex edge 21. The slot is adapted to engage with the latching protrusion 122. The columnar connector 12 can move downward relative to the slot under external pressure. The sliding of the latching protrusion 122 within the slot maintains continuous contact pressure, compensating for structural wear caused by long-term use.

[0066] In a preferred embodiment, the circular groove 22 can collect water droplets that penetrate from the connection gap between the key cap 11 and the mounting groove. A drainage hole is opened on the groove wall close to the bottom of the mounting groove. The drainage hole is connected to the diversion channel 23. The diversion channel 23 is arranged obliquely. The horizontal height of the drainage hole is higher than the horizontal height of the water outlet end of the diversion channel 23. Figure 4 The drainage hole is arranged at the bottom of the installation groove wall to form a liquid level difference with the meandering groove 22, and the infiltrated liquid flows out naturally along the inclined guide channel 23 under the action of gravity. In addition, the inclined arrangement of the guide channel 23 allows external airflow to enter but prevents liquid from flowing back.

[0067] In another preferred embodiment, the bottom of the meandering groove 22 is sloped to facilitate drainage. A drainage hole is provided at the lowest point of the bottom of the meandering groove 22, communicating with the diversion channel 23. The diversion channel 23 is arranged at an angle, with the drainage hole at a level higher than the outlet of the diversion channel 23. A slope (15°) is provided at the bottom of the meandering groove 22, and a drainage hole (1.2 mm in diameter) is provided at the lowest point. A waterproof and breathable membrane made of ePTFE, such as Gore's GORE-TEX® waterproof membrane with a pore size of 0.2 μm, can be embedded within the drainage hole to provide both drainage and dust protection. This allows water flowing into the meandering groove 22 to be diverted to the drainage hole and discharged naturally through the inclined diversion channel 23, preventing liquid accumulation within the meandering groove 22 and reducing the amount of residual liquid within the meandering groove 22. A hydrophobic layer can also be provided at the bottom of the meandering groove 22.

[0068] The bottom of the aforementioned meandering groove 22 may be provided with a plurality of radial microgrooves, each of which has a depth of 0.3 mm and a width of 0.5 mm, to form a capillary action to accelerate drainage.

[0069] In summary, the waterproof button structure for a blood pressure monitor provided by the present application achieves active drainage of the device through the water-retaining convex edge 21, the circular groove 22, and the diversion channel 23. A three-dimensional labyrinth seal is formed by the staggered design of the convex eave 111 and the water-retaining convex edge 21. Gravity self-drainage is achieved through the sloped circular groove 22 and the inclined diversion channel 23. The snap-on slot design enables simple disassembly and assembly of the button body, thereby improving the waterproof performance of the blood pressure monitor as a whole. In addition, the elastic pad 4 provided at the bottom of the mounting slot and abutting against the columnar connector 12 of the button body improves the pressing feel of the button and enhances the comfort of operation. Therefore, the waterproof button structure provided by the present application can solve the problems of poor waterproof effect of traditional blood pressure monitor buttons, easy aging and failure of the sealing ring, and difficulty in draining accumulated water.

[0070] Example 2

[0071] Based on the waterproof button structure for a blood pressure meter provided in the first embodiment, this embodiment provides an electronic blood pressure meter. Figure 1 A button 1 is provided on the front shell 2 of the electronic sphygmomanometer, and the button adopts the waterproof button structure for the sphygmomanometer provided in Example 1.

[0072] See also Figure 2 The electronic sphygmomanometer provided in this embodiment mainly includes a sphygmomanometer front shell 2 and a sphygmomanometer rear shell 5 that is aligned with the sphygmomanometer front shell 2 and is snap-connected to the sphygmomanometer front shell 2. A sealing ring is provided at the connection between the sphygmomanometer front shell 2 and the sphygmomanometer rear shell 5.

[0073] See also Figure 3The sphygmomanometer front housing 2 has a display mounting hole, a touch screen 3 is bonded to the display mounting hole, and a display is mounted on the back of the touch screen 3. In this application, the touch screen 3 and the sphygmomanometer front housing 2 are sealed by gluing, for example, double-sided tape or liquid glue (such as silicone, epoxy resin, polyurethane, or UV adhesive). Alternatively, hot melt sealing can be used, where the plastic housing and the display frame are fused together by heating or ultrasonic welding. If ultrasonic welding is used for connection and sealing, a welding energy of 3000J and a penetration depth of 0.8mm are selected to ensure an overall seal of the housing.

[0074] The front shell 2 and rear shell 5 of the sphygmomanometer above form an electrical compartment for accommodating an air pump, air circuit components, 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 the pressure signal collected by the pressure sensor and 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 (such as a lithium battery) 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 contact 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. See Figure 8 A cuff connection hole 51 is opened on the side wall of the electrical compartment. The cuff connection hole 51 is connected to the air pump through the air circuit component. The cuff connection hole 51 is used to connect the cuff.

[0075] It should be noted that the specific composition and structural design of the air circuit components, control circuit board, power module and switch circuit board in the sphygmomanometer are relatively mature technologies on the market, and this application will not provide a detailed introduction to this.

[0076] In addition, an Internet of Things module and data analysis algorithm can be added to the electronic blood pressure monitor provided in this application to enable it to have data storage / analysis / sharing functions, thereby obtaining a smart blood pressure monitor. The implementation architecture of smart blood pressure monitors is already existing technology in this field, such as the Omron HEM-7361T smart blood pressure monitor and the iHealth BP7 smart blood pressure monitor on the market. Therefore, in the specific production process, the corresponding Internet of Things module and data analysis algorithm can be expanded based on the structure of the electronic blood pressure monitor provided in this application according to user needs to meet the user's demand for intelligent blood pressure monitors.

[0077] The electrical compartment is provided with a scanner, and the scanner head 52 is mounted on the rear housing 5 of the blood pressure monitor. Figure 9The scanner can be connected to the microprocessor signal. When in use, the barcode on the wristband of the hospitalized patient can be scanned by the scanning head 52 to obtain the patient's information. The measured blood pressure data result is then synchronized with the patient's information. The blood pressure monitor can record the specific time and specific blood pressure measurement value of the blood pressure.

[0078] In this embodiment, a placement plane and a concave arc surface connected to the placement plane are formed on the rear shell 5 of the sphygmomanometer. A handle 53 is provided on the concave arc surface, and a storage space for storing the cuff is formed between the handle 53 and the concave arc surface.

[0079] In this embodiment, see Figure 10 A plurality of rubber pads 54 are provided at the bottom of the placement plane of the rear shell 5 of the blood pressure monitor, and the electronic blood pressure monitor is stably placed on the storage platform through the placement plane.

[0080] In the present 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 conducting a performance comparison experiment between a blood pressure monitor using the waterproof button structure provided by the present application and a conventional blood pressure monitor on the market is as follows: Table 1:

[0082]

[0083] In summary, the blood pressure monitor using the waterproof button structure provided in this application can adapt to humid environments or accidental splashing scenarios, has excellent waterproof performance, good structural sealing and reliability, and can not only achieve IPX7 level waterproofness in the button area, but also maintain the sensitive touch of the buttons, thereby extending the service life of the equipment.

[0084] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0085] The present application has been described in a relatively specific and detailed manner through general explanations and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations may be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by such conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A waterproof button structure for a blood pressure monitor, characterized in that: The invention comprises a button body and a front shell of the blood pressure meter for installing the button body; the button body comprises a button cap and a columnar connecting member connected to the bottom of the button cap, and two limit mounting buckles are relatively arranged on the side wall of the columnar connecting member near its bottom; a mounting groove adapted to the button cap is provided on the front shell of the blood pressure meter, a through hole is provided at the bottom of the mounting groove to allow the columnar connecting member to pass through, a water retaining ridge is provided along the upper edge of the through hole at the bottom of the groove, a card slot adapted to be engaged with the limit mounting buckle is provided on the inner wall of the water retaining ridge, and the water retaining ridge A circular groove is formed with the groove wall and groove bottom of the mounting groove, and a diversion channel connected to the circular groove is opened in the front shell of the sphygmomanometer, and the water outlet end of the diversion channel is arranged on the outer wall of the front shell of the sphygmomanometer; a gap is provided between the lower surface of the button cap and the top of the water-retaining convex edge, and the outer edge of the button cap is adapted to be slidably connected with the groove wall of the mounting groove, an elastic pad is installed on the lower surface of the mounting groove, and a protrusion is provided on the lower surface of the elastic pad for triggering the switch contact, the columnar connecting piece passes through the through hole and abuts against the elastic pad, and the protrusion is located below the columnar connecting piece.

2. The waterproof button structure for a blood pressure monitor according to claim 1, characterized in that: The size of the columnar connecting member is smaller than that of the key cap. The columnar connecting member is arranged at the center of the bottom of the key cap. The columnar connecting member includes two clamping plates arranged opposite to each other. The outer side walls of the clamping plates near the bottom are provided with clamping protrusions. The clamping plates and the clamping protrusions constitute the position-limiting mounting buckle. The surface of the locking protrusion facing away from the button cap forms a mounting inclined surface.

3. The waterproof button structure for a blood pressure monitor according to claim 1, characterized in that: The button cap includes a pressing plate and a circle of convex eaves arranged on the outer edge of the pressing plate. The columnar connecting member is provided on the lower surface of the pressing plate. The shape and size of the convex eaves are respectively 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 the action of external pressure, and then drive the protrusion under the elastic pad to apply pressure to the switch contact through the columnar connecting member.

4. The waterproof button structure for a blood pressure monitor according to claim 3, characterized in that: The water retaining convex edge is located below the button cap, the convex eave and the water retaining convex edge are staggered up and down, and the height of the water retaining convex edge is less than the height of the columnar connecting member.

5. The waterproof button structure for a blood pressure monitor according to claim 2, characterized in that: The clamping slot is a groove provided on the inner wall of the water retaining convex edge. The clamping slot can be adapted to be clamped with the clamping convex edge. The columnar connecting member can move downward relative to the clamping slot under the action of external pressure.

6. The waterproof button structure for a blood pressure monitor according to claim 1, characterized in that: The circular groove can collect water droplets that seep into the connection gap between the key cap and the mounting groove. A drainage hole is provided on the groove wall close to the bottom of the mounting groove. The drainage hole is connected to the diversion channel. The diversion 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 diversion channel.

7. The waterproof button structure for a blood pressure monitor according to claim 1, characterized in that: The bottom of the meandering groove forms a slope that is conducive to drainage. A drainage hole is opened at the lowest point of the bottom of the meandering groove. The drainage hole is connected to the diversion channel. The diversion channel is arranged at an angle. The horizontal height of the drainage hole is higher than the horizontal height of the water outlet end of the diversion channel.

8. An electronic blood pressure monitor, characterized in that: It includes a front shell of the sphygmomanometer and a rear shell of the sphygmomanometer that is aligned and snap-connected with the front shell of the sphygmomanometer, and a sealing ring is provided at the connection between the front shell and the rear shell of the sphygmomanometer; A display screen mounting hole is provided on the front shell of the blood pressure monitor, a touch screen is bonded to the display screen mounting hole, and a display screen is provided on the back of the touch screen; One or more buttons are provided on the front shell of the sphygmomanometer, and the buttons adopt the waterproof button structure for the sphygmomanometer according to any one of claims 1 to 7.

9. The electronic blood pressure monitor according to claim 8, wherein: The front shell and the rear shell of the sphygmomanometer form an electrical compartment for accommodating an air pump, an air 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 the pressure signal collected by the pressure sensor and process it and output it to the display screen for display, and 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 a switch contact, and the microprocessor is capable of obtaining a trigger signal from the switch contact, and then sending a command signal to the air pump according to the trigger signal, and the air pump inflates and deflates the cuff according to the command signal; A cuff connection hole is provided on the side wall of the electrical compartment, the cuff connection hole is connected to the air pump through the air circuit assembly, and the cuff connection hole is used for connecting a cuff; A scanner is provided in the electrical compartment, a scanning head of the scanner is mounted on the rear shell of the sphygmomanometer, and the scanner is connected to the microprocessor signal.

10. The electronic blood pressure monitor according to claim 8, wherein: A placement plane and a concave arc surface connected to the placement plane are formed on the rear shell of the blood pressure monitor, a handle is provided on the concave arc surface, and a storage space for storing a cuff is formed between the handle and the concave arc surface; A plurality of rubber pads are provided at the bottom of the placement plane, and the electronic blood pressure monitor is stably placed on the storage platform through the placement plane.

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