Key structure for medical instrument and handheld medical equipment

Abstract

The utility model belongs to the technical field of handheld medical equipment, and relates to a key structure for medical equipment and handheld medical equipment. The key structure for the medical instrument comprises a shell, wherein an accommodating cavity is formed in the shell; the sensing structure is located in the containing cavity and comprises a sensor and a cantilever which are connected with each other, one end of the cantilever is fixed, the cantilever has elasticity, and the sensor is arranged at the fixed end of the cantilever and used for sensing the deformation degree of the cantilever; the circuit board is located in the containing cavity and connected to the sensor. The shell is integrally provided with a pressing part, the pressing part has elasticity, and the cantilever is located within the deformation range of the pressing part. The pressing part can deform towards the cantilever, the sensor can convert deformation of the cantilever into an electric signal, and due to the fact that the pressing part and the shell are integrally formed, no gap is generated between the shell and the pressing part when the pressing part is pressed, and liquid is prevented from entering the shell. The sensor senses the deformation of the fixed end of the cantilever, the sensitivity is higher than that of a split type touch screen and is lower than that of a touch screen, and mistaken touch can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of handheld medical devices, and more specifically, to a key structure for medical devices and a handheld medical device. Background Art

[0002] During the operation of existing handheld medical devices, it is necessary to switch or turn on / off the working mode, so buttons are usually provided. However, in existing handheld medical devices, the design of the key structure for medical devices has poor sealing performance, often resulting in water ingress into the housing of the key structure for medical devices when the button is used. For example, when the key structure for medical devices in a dental handheld medical device is in use, the outer surface of its housing may come into contact with liquids such as disinfectant. At this time, if a medical staff presses the button on the housing of the key structure for medical devices, a small gap will be generated due to misalignment between the button and the housing of the key structure for medical devices, and liquids such as disinfectant will enter the interior of the key structure for medical devices through this gap, thereby causing damage to the button and the internal circuit board.

[0003] At the same time, in the prior art, when a touch screen is used to replace the button in the key structure for medical devices, a user will activate the button with a slight touch on the touch screen, so its sensitivity is too high and it is prone to accidental touch; while traditional split buttons require pressing the pressure sensor directly below with force until the pressure sensor senses a certain pressure threshold, so its sensitivity is too low.

[0004] In summary, the existing key structure for medical devices has poor sealing performance, low service life, and its sensitivity does not meet the actual operation requirements. Summary of the Utility Model

[0005] The technical problem to be solved by the technical solution of the present utility model is the problem that the existing key structure for medical devices has poor sealing performance, low service life, and its sensitivity does not meet the actual requirements.

[0006] To solve the above technical problems, the technical solution of the present utility model provides a key structure for medical devices, which includes:

[0007] A housing, an accommodation cavity is formed inside the housing;

[0008] An induction structure, the induction structure is located in the accommodation cavity, includes a sensor and a cantilever with one end fixed, the cantilever has elasticity, at least part of the sensor is arranged at the fixed end of the cantilever, and is used to sense the deformation degree of the cantilever;

[0009] A circuit board, the circuit board is located in the accommodation cavity and is connected to the sensor;

[0010] Wherein, the housing is integrally formed with a pressing part, the pressing part is elastic, and the cantilever is within the deformation range of the pressing part.

[0011] Furthermore, the circuit board is provided with a through hole, the fixed end of the cantilever is connected to the circuit board, the free end of the cantilever is located within the through hole, one end of the sensor is arranged on the circuit board, and the other end is arranged at the fixed end of the cantilever; and / or,

[0012] The medical device button structure further includes an elastic silica gel, the elastic silica gel is located between the pressing part and the cantilever, one end of the elastic silica gel abuts against the cantilever, and the other end abuts against the pressing part; and / or,

[0013] The housing is also integrally formed with a display screen, and the display screen is electrically connected to the circuit board; and / or,

[0014] The sensor includes any one of a pressure-sensitive chip and a pressure-sensitive resistor.

[0015] Furthermore, the medical device button structure further includes a circuit component, the circuit component is located within the accommodation cavity, the circuit board is connected to the circuit component, and the circuit component is provided with a guiding block;

[0016] The inner side wall of the accommodation cavity is provided with a guiding channel, the guiding block is located within the guiding channel, and the guiding channel and the guiding block cooperate to guide the relative movement of the circuit component and the housing.

[0017] Furthermore, the inner side wall of the accommodation cavity is provided with a stopping step, one side of the circuit component away from the circuit board is provided with a stopping part, and the stopping part abuts against the stopping step to limit the distance that the circuit component moves along the guiding channel towards the inside of the accommodation cavity.

[0018] Furthermore, the housing is provided with an opening, the opening communicates the accommodation cavity and the external environment, the circuit component further includes a charging interface and a battery, and both the charging interface and the battery are located at one end close to the opening;

[0019] The medical device button structure further includes a sealing component, the sealing component is detachably connected to the housing, abuts against the battery and the charging interface, and seals the opening.

[0020] Furthermore, the sealing component includes a sealing main body and a charging cover, the outer side wall of the sealing main body abuts against the inner side wall of the accommodation cavity, a charging hole is provided on one side of the sealing main body away from the accommodation cavity, and the charging hole communicates with the charging interface;

[0021] The charging cover is elastic and includes a covering portion and a connecting portion. The covering portion is located in the charging hole and is in interference fit with the charging hole. The connecting portion is located at one end of the covering portion close to the side wall of the charging hole, and its two ends are respectively connected to the sealing main body and the covering portion.

[0022] Furthermore, a sealing cavity is defined between the charging interface, the battery and the inner side wall of the accommodating cavity. The sealing main body includes a first sealing main body and a second sealing main body. The first sealing main body is located in the sealing cavity. An installation cavity is formed between the first sealing main body, the second sealing main body and the inner side wall of the accommodating cavity, and the installation cavity communicates with the charging hole;

[0023] One end of the connecting portion away from the covering portion is located in the installation cavity and is connected to the first sealing main body. The sealing assembly further includes a sealing plug, and the sealing plug is installed in the installation cavity in an interference fit manner to seal the installation cavity.

[0024] Furthermore, the first sealing main body is provided with a first sealing protrusion, the second sealing main body is provided with a second sealing protrusion, the sealing plug is provided with a first sealing groove on the side facing the first sealing main body and a second sealing groove on the side facing the second sealing main body, the first sealing protrusion is inserted into the first sealing groove, and the second sealing protrusion is inserted into the second sealing groove; and / or,

[0025] One end of the connecting portion away from the covering portion is provided with a hook, and the hook is clamped with the first sealing main body; and / or,

[0026] The sealing assembly further includes a first sealing ring, and the first sealing ring is clamped between the side wall of the sealing main body and the inner side wall of the accommodating cavity and is in interference fit with the side walls of the sealing main body and the accommodating cavity; and / or,

[0027] The sealing assembly further includes a second sealing ring. The first sealing main body is provided with a positioning groove on the side facing the charging interface, and at least part of the charging interface is located in the positioning groove. The second sealing ring is clamped between the charging interface and the inner side wall of the positioning groove.

[0028] Correspondingly, the technical solution of the present utility model further provides a handheld medical device, and the handheld medical device includes the medical device button structure according to any one of the above embodiments.

[0029] Further, the handheld medical device further includes a bracket, the bracket includes a base and a support member connected to each other, the support member is provided with a placement groove facing away from the base, the placement groove is adapted to the shape of the outer shell, the inner wall of the placement groove is provided with fixing protrusions, and the outer shell is provided with fixing grooves, and the fixing protrusions are inserted into the fixing grooves.

[0030] Compared with the prior art, the technical solution of the present invention mainly has the following beneficial effects:

[0031] First, since the pressing part and the outer shell are integrally formed, there will be no gap between the outer shell and the pressing part. When the pressing part is pressed, external liquid cannot enter the outer shell, thereby improving the service life of the key structure for medical devices. Secondly, the cantilever is within the deformation range of the pressing part. Therefore, after the pressing part is pressed and the cantilever in the accommodating cavity deforms, the pressing part can contact the cantilever and cause the cantilever to deform. The sensor can collect the deformation information of the cantilever and convert the deformation information of the cantilever into an electrical signal and transmit it to the circuit board for the circuit board to read. The free end of the cantilever only changes in position during the deformation process of the cantilever, but its shape remains basically unchanged. Therefore, the deformation degree of the fixed end of the cantilever is greater than that of the free end. At least part of the sensors in this solution are located at the fixed end of the cantilever, so it is easier for the sensors to collect the deformation signal of the cantilever. Therefore, its sensitivity is higher than that of the split key structure using a pressure sensor and lower than that of the touch screen key structure, thereby avoiding accidental touch by the user and meeting the actual operation requirements. Description of the Drawings

[0032] In order to more clearly illustrate the solutions in the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 is a cross-sectional view of the key structure for medical devices according to an embodiment of the present invention;

[0034] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0035] Figure 3 is Figure 1 a schematic structural view of the circuit board in

[0036] Figure 4 is Figure 1 a schematic structural view of the outer shell in

[0037] Figure 5It is a schematic diagram of the assembly relationship between the housing and the circuit component in the button structure for medical devices according to an embodiment of the present utility model;

[0038] Figure 6 It is Figure 1 an enlarged schematic diagram of part B in

[0039] Figure 7 It is Figure 1 an enlarged schematic diagram of part C in

[0040] Figure 8 It is a schematic diagram of the structure of the bracket according to an embodiment of the present utility model;

[0041] Figure 9 It is a schematic diagram of the structure of the button structure for medical devices according to an embodiment of the present utility model.

[0042] Reference numerals:

[0043] housing 100, sealing cavity 20, installation cavity 30, first sealing ring 40, second sealing ring 50, charging hole 60, housing 100, opening 101, pressing part 110, display screen 120, fixing groove 130, stopping step 140, circuit board 200, cantilever 210, fixed end 211, free end 212, through hole 220, elastic silica gel 300, sealing component 400, charging cover 410, covering part 411, connecting part 412, sealing main body 420, first sealing main body 421, second sealing main body 422, first sealing protrusion 423, second sealing protrusion 424, bracket 500, support part 510, base 520, placing groove 511, fixing protrusion 512, circuit component 600, battery 610, stopping part 611, charging interface 620, guiding block 630, sealing plug 700, sensor 800. Detailed implementation manners

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0045] References herein to "embodiments" mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0046] To solve the above technical problems, please refer to Figures 1 to 4 , the technical solution of the present utility model provides a key structure for medical devices, and the key structure for medical devices includes:

[0047] A housing 100, within which a receiving cavity (not marked in the figure) is formed;

[0048] A sensing structure, which is located within the receiving cavity and includes a sensor 800 and a cantilever 210 with one end fixed. The cantilever 210 is elastic, and at least part of the sensor 800 is disposed at the fixed end 211 of the cantilever 210 ( Figure 3 the right end part of region D in

[0049] ), for sensing the degree of deformation of the cantilever 210;

[0050] A circuit board 200, which is located within the receiving cavity and is connected to the sensor 800;

[0051] In this embodiment, first, since the pressing part 110 and the housing 100 are integrally formed, there will be no gap between the housing 100 and the pressing part 110. When the pressing part 110 is pressed, external liquid cannot enter the housing 100, thereby increasing the service life of the button structure for medical devices. Second, the cantilever 210 is within the deformation range of the pressing part 110. Therefore, after the pressing part 110 is pressed and deformed towards the cantilever 210 in the accommodation cavity, the pressing part 110 can contact the cantilever and cause the cantilever 210 to deform. The sensor 800 can collect the deformation information of the cantilever 210 and convert the deformation information of the cantilever 210 into an electrical signal for transmission to the circuit board 200 for the circuit board 200 to read. The free end 212 of the cantilever 210 only changes in position during the deformation process of the cantilever 210, but its shape remains basically unchanged. Therefore, the deformation degree of the fixed end 211 of the cantilever 210 is greater than that of the free end 212. At least part of the sensor 800 of this solution is located at the fixed end 211 of the cantilever 210, so it is easier for the sensor 800 to collect the deformation signal of the cantilever 210. Therefore, its sensitivity is higher than that of the split button structure using a pressure sensor and lower than that of the touch screen button structure, thereby avoiding accidental touch by the user and meeting the actual operation requirements.

[0052] In summary, the button structure for medical devices of the present application can prevent liquid from entering the interior and contacting the circuit board 200 when in the pressed control state, thereby increasing the service life. It should be understood that, please refer to Figures 1 to 4 , multiple pressing parts 110 and sensing structures can be provided, and there is a one-to-one correspondence between the pressing parts 110 and the sensing structures, thereby realizing quick switching between multiple working states of the button structure for medical devices. It should be understood that the connection between the sensor 800 and the cantilever 210 should be understood as that the sensor 800 can collect the deformation signal of the cantilever 210, which includes forms such as electrical connection and mechanical connection. That is, the sensor 800 can be located in Figure 3 area D, and connected to the cantilever; or, the sensor 800 can also locate its main body in the remaining devices in the accommodation cavity or the remaining parts of the circuit board 200, and then connect to the cantilever 210 by extending its own components, etc. For example: the sensor includes a Wheatstone half-bridge composed of a pressure-sensitive resistance element and a fixed resistance element. At this time, the fixed resistance element can be located in the remaining part of the circuit board 200, and it is connected to the pressure-sensitive resistance element located at the fixed end 211 of the cantilever 210 through a wire, thereby collecting the deformation signal of the cantilever 210.

[0053] Furthermore, please refer to Figures 1 to 3 , the circuit board 200 is provided with a through hole 220. The fixed end 211 of the cantilever 210 is connected to the circuit board 200, and the free end 212 of the cantilever is located in the through hole 200. One end of the sensor 800 is arranged on the circuit board 200, and the other end is arranged at the fixed end 211 of the cantilever 210.

[0054] In this embodiment, after the pressing portion 110 deforms towards the cantilever 210 and squeezes the cantilever 210, since the free end 212 of the cantilever 210 is located in the through hole 220, at least a part of the cantilever 210 can bend and deform in the through hole 220. At this time, since the fixed end 211 of the cantilever 210 has a greater degree of deformation than the free end 212 of the cantilever 210 during the deformation process of the cantilever 210, and one end of the sensor 800 is arranged on the circuit board 200 and the other end is arranged on the fixed end 211 of the cantilever 210, after the cantilever 210 is pressed, according to the principle of the lever arm, the degree of deformation of the cantilever 210 that the sensor 800 can collect is relatively large, that is, the cantilever 210 can generate a large degree of deformation information with a relatively small force. Therefore, when the sensor 800 senses the cantilever 210, its sensitivity is relatively high.

[0055] Further, please refer to Figure 1 and Figure 2 , the key structure for medical devices further includes an elastic silica gel 300. The elastic silica gel 300 is located between the pressing portion 110 and the cantilever 210. One end of the elastic silica gel 300 abuts against the cantilever 210, and the other end abuts against the pressing portion 110.

[0056] In this embodiment, the elastic silica gel 300 can play a role in extending the degree of deformation of the pressing portion 110. Therefore, when the pressing portion 110 presses the elastic silica gel 300, the elastic silica gel 300 squeezes the cantilever 210, causing the cantilever 210 to deform. At this time, the sensor 800 senses the deformation of the cantilever 210 and converts the deformation information into an electrical signal and transmits it to the circuit board 200, and the key action is controlled via the circuit board 200. That is, when the pressing member presses the elastic silica gel 300, the elastic silica gel 300 can contact the cantilever 210, thereby avoiding the need for the pressing portion 110 to undergo a large deformation before contacting the cantilever 210, and further avoiding damage to the pressing portion 110 beyond the elastic deformation. The elastic silica gel 300 can also play a buffering role through its own deformation, thereby reducing the magnitude of the force applied by the pressing portion 110 on the cantilever 210, and at the same time enabling the user to clearly feel the "pressing to bouncing" feel, which is convenient for the user to judge the state of the pressing portion 110. It should be understood that the elastic silica gel 300 can be a silica gel key.

[0057] Further, please refer to Figure 1 and Figure 2 , the housing 100 is also integrally formed with a display screen 120, and the display screen 120 is electrically connected to the circuit board 200.

[0058] In this embodiment, since the display screen 120 and the housing 100 are integrally formed, the key structure for medical devices has high sealing performance and can display the current working state in real time.

[0059] Further, the sensor 800 includes any one of a pressure-sensitive chip and a pressure-sensitive resistor.

[0060] Further, please refer to Figure 1 and Figure 5 , the key structure for medical devices further includes a circuit component 600. The circuit component 600 is located in the accommodation cavity. The circuit board 200 is connected to the circuit component 600. The circuit component 600 is provided with a guiding block 630;

[0061] The inner side wall of the accommodation cavity is provided with a guiding channel 150. The guiding block 630 is located in the guiding channel 150. The guiding channel 150 and the guiding block 630 cooperate to guide the relative movement of the circuit component 600 and the housing 100.

[0062] In this embodiment, when assembling the key structure for medical devices, a plurality of components including the circuit board 200 need to be placed inside the housing 100. To improve the assembly efficiency of the key structure for medical devices, in this embodiment, the circuit board 200 and the circuit component 600 are connected, that is, the assembly relationship of each component has been completed. When assembling the key structure for medical devices, it only needs to quickly complete the installation by simply inserting the circuit component 600 and the circuit board 200 as a whole into the accommodation cavity, thereby effectively improving the assembly efficiency of the key structure for medical devices. At the same time, the cooperation between the guiding channel 150 and the guiding block 630 can enable the circuit component 600 to enter the accommodation cavity along a preset path, avoiding phenomena such as the failure of the pressing part 110 and easy slippage caused by the overall movement of the circuit component 600 and the circuit board 200 deviating from the predetermined position.

[0063] Further, please refer to Figure 1 , Figure 5 and Figure 6 . The inner side wall of the accommodation cavity is provided with a stopping step 140. A stopping portion 611 is provided on the side of the circuit component 600 away from the circuit board 200. The stopping portion 611 abuts against the stopping step 140 to limit the distance that the circuit component 600 moves along the guiding channel 150 towards the inside of the accommodation cavity.

[0064] In this embodiment, the abutting cooperation between the stopping step 140 and the stopping portion 611 can prevent the circuit component 600 from hitting other internal structures too deeply after entering the accommodation cavity, and can also prevent the circuit component 600 from deviating from the preset position, resulting in misalignment between the pressing part 110 and the cantilever 210.

[0065] Further, please refer to Figure 1 , Figures 5 to 7, the housing 100 is provided with an opening 101, the opening 101 communicates with the accommodation cavity and the external environment, the circuit assembly 600 further includes a charging interface 620 and a battery 610, and both the charging interface 620 and the battery 610 are located at one end close to the opening 101;

[0066] The key structure for medical devices further includes a sealing assembly 400, the sealing assembly 400 is detachably connected to the housing 100, abuts against the battery 610 and the charging interface 620, and seals the opening 101.

[0067] In this embodiment, the key structure for medical devices also needs to be able to perform charging processing. Therefore, its circuit assembly 600 includes a charging interface 620 and a battery 610. To facilitate the connection between the charging interface 620 and an external charging cable, the charging interface 620 is located at the end where the opening 101 is located. The sealing assembly 400 can seal the opening 101, thereby preventing external water vapor from entering the accommodation cavity and damaging the circuit board 200. At the same time, when charging is required, the charging interface 620 can be exposed by removing the sealing assembly 400, and then charging can be completed. It should be understood that the charging interface 620 can be a USB interface.

[0068] Further, please refer to Figure 1 , Figures 5 to 7 , the sealing assembly 400 includes a sealing main body 420 and a charging cover 410. The outer side wall of the sealing main body 420 abuts against the inner side wall of the accommodation cavity. A charging hole 60 is provided on the side of the sealing main body 420 away from the accommodation cavity, and the charging hole 60 communicates with the charging interface 620;

[0069] The charging cover 410 has elasticity and includes a covering portion 411 and a connecting portion 412. The covering portion 411 is located in the charging hole 60 and is in interference fit with the charging hole 60. The connecting portion 412 is located at one end of the side wall of the covering portion 411 close to the charging hole 60, and its two ends are respectively connected to the sealing main body 420 and the covering portion 411.

[0070] In this embodiment, the sealing main body 420 functions to seal the remaining space except the charging interface 620. Since the charging cover 410 has elasticity and the connecting portion 412 is located at one end of the side wall of the covering portion 411 close to the charging hole 60, the covering portion 411 can rotate relative to the charging hole 60 around the connection point between the covering portion 411 and the connecting portion 412, that is, tilt towards the direction away from the charging hole 60, thereby exposing the charging interface 620 to the external environment to achieve charging. After charging is completed, the charging interface 620 can also be quickly switched between the exposed and sealed states by inserting the covering portion 411 into the charging hole 60.

[0071] Further, please refer to Figure 1 , Figures 5 to 7A sealed cavity 20 is defined between the charging interface 620, the battery 610 and the inner side wall of the accommodating cavity. The sealed body 420 includes a first sealed body 421 and a second sealed body 422. The first sealed body 421 is located in the sealed cavity 20. An installation cavity 30 is formed between the first sealed body 421, the second sealed body 422 and the inner side wall of the accommodating cavity. The installation cavity 30 is connected to the charging hole 60.

[0072] One end of the connecting portion 412 away from the covering portion 411 is located in the installation cavity 30 and connected to the first sealing body 421 . The sealing assembly 400 further includes a sealing plug 700 installed in the installation cavity 30 with an interference fit to seal the installation cavity 30 .

[0073] In this embodiment, the first sealing body 421 plays a role in sealing the sealing cavity 20 to a certain extent. However, in order to allow one end of the connecting portion 412 to be connected to the fixing portion and to facilitate the lifting and stretching of the covering portion 411, it is necessary to design a mounting cavity 30, so that the connecting portion 412 can penetrate into the mounting cavity 30. However, external liquid may enter the mounting cavity 30 through the charging hole 60, and then gradually flow to the inner wall of the accommodating cavity, and finally enter the space where the circuit board 200 is located through the gap between the inner wall of the accommodating cavity and the first sealing body 421. The sealing plug 700 in this embodiment is installed in the mounting cavity 30 with an interference fit, so it can prevent the liquid from flowing from the mounting cavity 30 to the side wall of the accommodating cavity, thereby improving the sealing of the key structure for medical devices.

[0074] For further information, please refer to Figure 1 , Figures 5 to 7 The first sealing body 421 is provided with a first sealing protrusion 423, the second sealing body 422 is provided with a second sealing protrusion 424, the sealing plug 700 is provided with a first sealing groove on the side facing the first sealing body 421, and a second sealing groove on the side facing the second sealing body 422, the first sealing protrusion 423 is inserted into the first sealing groove, and the second sealing protrusion 424 is inserted into the second sealing groove; and / or,

[0075] A hook is disposed at one end of the connection portion 412 away from the covering, and the hook is engaged with the first sealing body 421; and / or,

[0076] The sealing assembly 400 further includes a first sealing ring 40, which is disposed between the side wall of the sealing body 420 and the inner side wall of the accommodating cavity and is interference fit with the sealing body 420 and the side wall of the accommodating cavity; and / or,

[0077] The sealing assembly 400 also includes a second sealing ring 50. A positioning groove is provided on the side of the first sealing body 421 facing the charging interface 620. At least part of the charging interface 620 is located in the positioning groove. The second sealing ring 50 is clamped between the charging interface 620 and the inner wall of the positioning groove.

[0078] In this embodiment, the cooperation between the first sealing protrusion 423, the second sealing protrusion 424 and the first sealing groove and the second sealing groove can improve the sealing effect of the sealing plug 700 on the installation cavity 30, and further prevent liquid from flowing from the gap formed between the sealing plug 700 and the first main body and the second main body to the side wall of the accommodating cavity.

[0079] After a hook is provided at one end of the connecting portion 412, the hook can play an effective fixing role to prevent the covering portion 411 from causing the charging cover 410 to separate from the sealing assembly 400 during the process of tilting and flipping.

[0080] The first sealing ring 40 and the second sealing ring 50 can respectively improve the sealing performance between the sealing main body 420 and the side wall of the accommodating cavity and the sealing performance between the charging interface 620 and the first sealing main body 421.

[0081] The technical solution of the present utility model further provides a handheld medical device, which includes the medical device button structure according to any one of the above embodiments.

[0082] In a handheld medical device, firstly, since the pressing portion 110 and the housing 100 are integrally formed, there will be no gap between the housing 100 and the pressing portion 110. When the pressing portion 110 is pressed, external liquid cannot enter the housing 100, thereby increasing the service life of the medical device button structure. Secondly, the cantilever 210 is within the deformation range of the pressing portion 110. Therefore, after the pressing portion 110 is pressed and deforms towards the cantilever 210 in the accommodating cavity, the pressing portion 110 can contact the cantilever and cause the cantilever 210 to deform. The sensor 800 can collect the deformation information of the cantilever 210 and convert the deformation information of the cantilever 210 into an electrical signal for transmission to the circuit board 200 for the circuit board 200 to read. The free end 212 of the cantilever 210 only changes in position during the deformation process of the cantilever 210, but its shape remains basically unchanged. Therefore, the deformation degree of the fixed end 211 of the cantilever 210 is greater than that of the free end 212. At least part of the sensor 800 of this solution is located at the fixed end 211 of the cantilever 210, so it is easier for the sensor 800 to collect the deformation signal of the cantilever 210. Therefore, its sensitivity is higher than that of a split button structure using a pressure sensor and lower than that of a touch screen button structure, thus avoiding accidental touch by the user and meeting the actual operation requirements. In summary, the handheld medical device of the present application can prevent liquid from entering and contacting the circuit board 200 when in a pressed control state, thereby increasing the service life.

[0083] Further, please refer to Figure 8 and Figure 9, the handheld medical device further includes a bracket 500. The bracket 500 includes a base 520 and a support member 510 connected to each other. The support member 510 is provided with a placement groove 511 facing away from the base 520. The placement groove 511 is adapted to the shape of the housing 100. The inner wall of the placement groove 511 is provided with fixing protrusions 512, and the housing 100 is provided with fixing grooves 130. The fixing protrusions 512 are inserted into the fixing grooves 130.

[0084] In this embodiment, during the operation of the user of the key structure for medical devices, it may be necessary to temporarily place the housing 100 to handle other matters or observe the surgical status. And the housing 100 needs to avoid contact with external devices, so as to avoid water ingress or contamination by dust and bacteria. At this time, the bracket 500 can play a role in supporting the housing 100. Specifically, the base 520 plays a role in providing stability, and the support member 510 is used for the housing 100 to be placed in the placement groove 511, so that the fixing protrusions 512 and the fixing grooves 130 cooperate, thereby preventing the housing 100 from sliding in the placement groove 511.

[0085] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

[0086] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The drawings show the preferred embodiments of the present application, but do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present application in other related technical fields is similarly within the scope of the patent protection of the present application.

[0087] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, combinations, substitutions, and variations can be made to these embodiments without departing from the principle and purpose of the present application. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A key structure for medical equipment, characterized in that: The key structure for medical equipment comprises: A housing, wherein a receiving cavity is formed inside the housing; A sensing structure, the sensing structure is located in the accommodating cavity, and includes interconnected sensors and a cantilever with one end fixed, the cantilever is elastic, at least part of the sensor is arranged at the fixed end of the cantilever, and is used to sense the deformation degree of the cantilever; A circuit board, the circuit board is located in the accommodating cavity and connected to the sensor; Wherein, the housing is integrally formed with a pressing portion, the pressing portion is elastic, and the cantilever is located within the deformation range of the pressing portion.

2. The key structure for medical equipment according to claim 1, characterized in that: The circuit board is provided with a through hole, the fixed end of the cantilever is connected to the circuit board, the free end of the cantilever is located in the through hole, one end of the sensor is provided on the circuit board, and the other end is provided on the fixed end of the cantilever; and / or, The medical device key structure further includes an elastic silicone, which is located between the pressing portion and the cantilever, with one end of the elastic silicone abutting against the cantilever and the other end abutting against the pressing portion; and / or, The housing is also integrally formed with a display screen, and the display screen is electrically connected to the circuit board; and / or, The sensor includes any one of a pressure sensing chip and a pressure sensing resistor.

3. The key structure for medical equipment according to claim 1, characterized in that: The key structure for medical equipment further comprises a circuit assembly, the circuit assembly is located in the accommodating cavity, the circuit board is connected to the circuit assembly, and the circuit assembly is provided with a guide block; The inner side wall of the accommodating cavity is provided with a guide channel, the guide block is located in the guide channel, and the guide channel and the guide block cooperate to guide the relative movement of the circuit component and the housing.

4. The key structure for medical equipment according to claim 3, characterized in that: The inner side wall of the accommodating cavity is provided with a stop step, and the side of the circuit assembly away from the circuit board is provided with a stop portion, the stop portion abuts against the stop step to limit the distance that the circuit assembly moves along the guide channel toward the inside of the accommodating cavity.

5. The key structure for medical equipment according to claim 3, characterized in that: The housing is provided with an opening, the opening communicating with the accommodating cavity and the external environment, the circuit assembly further comprising a charging interface and a battery, the charging interface and the battery being both located at one end close to the opening; The key structure for medical equipment also includes a sealing component, which is detachably connected to the housing, abuts against the battery and the charging port, and seals the opening.

6. The key structure for medical equipment according to claim 5, characterized in that: The sealing assembly comprises a sealing body and a charging cover, the outer wall of the sealing body abuts against the inner wall of the accommodating cavity, a charging hole is provided on a side of the sealing body away from the accommodating cavity, and the charging hole is communicated with the charging interface; The charging cover is elastic and includes a covering portion and a connecting portion. The covering portion is located in the charging hole and has an interference fit with the charging hole. The connecting portion is located at one end of the covering portion close to the side wall of the charging hole, and its two ends are respectively connected to the sealing body and the covering portion.

7. The key structure for medical equipment according to claim 6, characterized in that: A sealed cavity is defined between the charging interface, the battery and the inner side wall of the accommodating cavity, the sealed body comprises a first sealed body and a second sealed body, the first sealed body is located in the sealed cavity, an installation cavity is formed between the first sealed body, the second sealed body and the inner side wall of the accommodating cavity, and the installation cavity is connected to the charging hole; One end of the connecting portion away from the covering portion is located in the installation cavity and connected to the first sealing body. The sealing assembly also includes a sealing plug installed in the installation cavity with an interference fit to seal the installation cavity.

8. The key structure for medical equipment according to claim 7, characterized in that: The first sealing body is provided with a first sealing protrusion, the second sealing body is provided with a second sealing protrusion, the sealing plug is provided with a first sealing groove on the side facing the first sealing body, and a second sealing groove on the side facing the second sealing body, the first sealing protrusion is plugged into the first sealing groove, and the second sealing protrusion is plugged into the second sealing groove; and / or, The connecting portion is provided with a hook at one end away from the covering portion, and the hook is engaged with the first sealing body; and / or, The sealing assembly further includes a first sealing ring, which is clamped between the side wall of the sealing body and the inner side wall of the accommodating cavity and is interference-fitted with the sealing body and the side wall of the accommodating cavity; and / or, The sealing assembly also includes a second sealing ring. A positioning groove is provided on the side of the first sealing body facing the charging interface. At least a portion of the charging interface is located in the positioning groove. The second sealing ring is clamped between the charging interface and the inner side wall of the positioning groove.

9. A handheld medical device, characterized in that: The handheld medical device comprises the medical instrument key structure according to any one of claims 1 to 8.

10. The handheld medical device according to claim 9, characterized in that: The handheld medical device also includes a bracket, which includes a base and a support member connected to each other, the support member is provided with a placement groove in a direction away from the base, the placement groove is adapted to the shape of the shell, the inner wall of the placement groove is provided with a fixing protrusion, the shell is provided with a fixing groove, and the fixing protrusion is inserted into the fixing groove.

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