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 for the medical instrument comprises a shell, a circuit board, an induction key and a first capacitance touch key. A containing cavity is formed in the shell and provided with a pressing part. The circuit board is positioned in the accommodating cavity; the sensing key comprises a sensor and an elastic arm, one end of the elastic arm is fixed, and the sensor is arranged at the fixed end of the elastic arm and connected with the circuit board; the first capacitive touch key abuts against the free end of the elastic arm and is located within the deformation range of the pressing part. The sensing key can be triggered only when a user applies force to the pressing part, so that the triggering requirement of the user can be ensured; static capacitance is formed in the area where the corresponding pressing part is located by the first capacitance touch key, and the first capacitance touch key can be triggered only when a user touches the pressing part. Therefore, the key structure for the medical instrument can be triggered only when a user needs to press the key structure at a correct position, and the phenomenon of mistaken touch can be effectively 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 instruments and a handheld medical device. Background Art

[0002] Handheld medical devices must prevent water from entering the connection between the housing and buttons. For example, when the medical button structure in a dental handheld medical device is in use, the outer surface of the housing may come into contact with liquids such as disinfectant. In this situation, if a medical professional presses a button on the housing of the medical button structure, the button will be misaligned with the housing, creating a small gap. Disinfectant and other liquids can enter the interior of the medical button structure through this gap, potentially damaging the button and internal circuit boards.

[0003] Therefore, existing medical device button structures integrate the housing and button into a single piece, with the button integrated into a pressing portion on the housing. When a user presses the pressing portion, the pressing portion is deformed toward the sensing button inside the housing, triggering the sensing button. The sensing button then sends a signal to the circuit board inside the housing, thereby controlling the handheld medical device. However, because the housing and pressing portion are integrally formed, if a user presses the periphery of a pressing portion on the housing or other adjacent pressing portions, the pressing portion may deform toward the sensing button due to the force exerted by the entire housing, resulting in the medical device button structure being accidentally activated.

[0004] In summary, existing button structures for medical devices have the risk of accidental touch. Utility Model Content

[0005] The technical problem to be solved by the technical solution of the present utility model is the risk of accidental touch in the existing key structure of medical devices.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following solutions:

[0007] A key structure for medical equipment, comprising:

[0008] A housing is formed with a receiving cavity inside the housing, and a pressing portion is integrally formed on the housing, and the pressing portion is elastic;

[0009] a circuit board, the circuit board being located in the accommodating cavity;

[0010] A sensing button, the sensing button comprising a sensor and an elastic arm connected to each other, one end of the elastic arm being fixed, at least part of the sensor being disposed at the fixed end of the elastic arm and connected to the circuit board for sensing the degree of deformation of the elastic arm;

[0011] A first capacitive touch button, one end of which abuts against the free end of the elastic arm and the other end of which is located within the deformation range of the pressing portion, is used to form and process a capacitive signal in the area where the pressing portion is located.

[0012] Furthermore, the first capacitive touch button is interference-fitted with the inner wall of the housing.

[0013] Furthermore, the first capacitive touch button includes an elastic conductive member, one end of the elastic conductive member abuts against the free end of the elastic arm, and the other end is located within the deformation range of the pressing portion; or,

[0014] The first capacitive touch button includes an elastic member and a conductive member. One end of the elastic member abuts against the elastic arm, and the other end abuts against the conductive member. The conductive member is located within the deformation range of the pressing portion.

[0015] Furthermore, the sensor includes a Wheatstone bridge circuit, and the Wheatstone bridge circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first power supply terminal, a second power supply terminal, a first signal output terminal, and a second signal output terminal connected in series in sequence;

[0016] The first power supply terminal is provided between the first resistor R1 and the fourth resistor R4, the second power supply terminal is provided between the second resistor R2 and the third resistor R3, the first signal output terminal is provided between the fourth resistor R4 and the third resistor R3, and the second signal output terminal is provided between the first resistor R1 and the second resistor 42;

[0017] At least two of the first resistor R1 , the second resistor R2 , the third resistor R3 and the fourth resistor R4 are strain gauge resistors.

[0018] Furthermore, the first capacitive touch button includes a first conductive spring and a first conductive column. The first conductive spring is sleeved on the first conductive column, and one end of the first conductive spring abuts against the inner wall of the shell where the pressing part is located, and the other end abuts against the first conductive column. The first conductive column is connected to the circuit board.

[0019] Furthermore, the first conductive spring includes a first sub-conductive spring and a second sub-conductive spring connected to each other, the first sub-conductive spring abuts against the conductive column, and along the compression direction of the first sub-conductive spring, the diameter of the first sub-conductive spring is equal, the second sub-conductive spring abuts against the inner wall of the outer shell, and along the direction from the first sub-conductive spring to the outer shell, the diameter of the second sub-conductive spring gradually increases.

[0020] Furthermore, the first conductive column includes a column and an annular protrusion, the annular protrusion is arranged on the side wall of the column, at least part of the column is passed through the circuit board, the annular protrusion abuts the circuit board, and is located between the circuit board and the first conductive spring, the first conductive spring is sleeved on the column and abuts the annular protrusion.

[0021] Furthermore, the key structure for medical equipment further includes a second capacitive touch key, the housing is provided with a plurality of pressing portions, the second capacitive touch key and the first capacitive touch key correspond to different pressing portions, and a gap exists between the second capacitive touch key and the first capacitive touch key;

[0022] The second capacitive touch button includes a second conductive column, which includes a first sub-conductive column and a second sub-conductive column. The first sub-conductive column is connected to the circuit board, and the second sub-conductive column is located within the deformation range of the pressing portion. Along the direction from the first sub-conductive column to the housing, the cross-sectional area of ​​at least part of the second sub-conductive column is greater than the cross-sectional area of ​​the first sub-conductive column.

[0023] Furthermore, the second conductive column and the housing are clearance-fitted.

[0024] A handheld medical device comprises the medical instrument key structure described in any one of the above embodiments.

[0025] Compared with the existing technology, the technical solution of this utility model has the following beneficial effects:

[0026] The triggering of the inductive key of the present invention requires the user to apply a certain degree of force to the pressing portion, causing the pressing portion to squeeze the first capacitive touch key and deform the elastic arm. This ensures that the user has the need to trigger the medical device key structure, preventing the first capacitive touch key from being accidentally activated. At the same time, the first capacitive touch key forms a static capacitor in the area where the corresponding pressing portion is located, ensuring that the first capacitive touch key can only be triggered when the user touches the pressing portion, preventing the inductive key from being accidentally activated. Therefore, the medical device key structure will only be activated when and only when the first capacitive touch key and its corresponding inductive key are triggered simultaneously. In other words, it can ensure that the user presses the correct pressing portion, thereby effectively preventing accidental touches. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic structural diagram of a key structure for medical devices according to an embodiment of the present utility model;

[0029] Figure 2 This is a cross-sectional view of a key structure for medical devices according to an embodiment of the present utility model;

[0030] Figure 3 yes Figure 2 A magnified schematic diagram of point A in the middle;

[0031] Figure 4 yes Figure 2 A magnified schematic diagram of point B in the middle;

[0032] Figure 5 yes Figure 2 Schematic diagram of the structure of the circuit board in;

[0033] Figure 6 It is a Wheatstone bridge circuit of the inductive key of the embodiment of the present application;

[0034] Figure 7 yes Figure 2 The enlarged schematic diagram of point C in the middle;

[0035] Figure 8 This is another structural diagram of the key structure for medical devices according to an embodiment of the utility model;

[0036] Figure 9 This is a schematic structural diagram of a bracket for a handheld medical device according to an embodiment of the present utility model;

[0037] Figure 10 It is a structural schematic diagram of a handheld medical device according to an embodiment of the present utility model.

[0038] Reference numerals:

[0039] Medical device key structure 10, housing 100, pressing portion 110, circuit board 200, elastic arm 210, fixed end 211, free end 212, sensor 220, first capacitive touch key 300, first conductive spring 310, first sub-conductive spring 311, second sub-conductive spring 312, first conductive column 320, column 321, annular protrusion 322, sealing assembly 400, charging cover 410, covering portion 411, connecting portion 412, sealing body 420, first Sealing body 421, second sealing body 422, first sealing protrusion 423, second sealing protrusion 424, bracket 500, support member 510, base 520, placement groove 511, fixing protrusion 512, circuit assembly 600, battery 610, stop portion 611, charging interface 620, guide block 630, sealing plug 700, second capacitive touch button 800, second conductive column 810, first sub-conductive column 811, second sub-conductive column 811, second conductive spring 820. DETAILED DESCRIPTION

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] To solve the above technical problems, please refer to Figures 1 to 4 This embodiment provides a key structure 10 for medical devices, and the key structure 10 for medical devices includes:

[0043] The housing 100 has a receiving cavity (not marked in the figure) formed inside the housing 100, and a pressing portion 110 is integrally formed on the housing 100. The pressing portion 110 is elastic;

[0044] The circuit board 200 is located in the accommodating cavity;

[0045] A sensing button, comprising a sensor 220 and an elastic arm 210 connected to each other, wherein one end of the elastic arm 210 is fixed, and at least part of the sensor 220 is disposed at the fixed end 211 of the elastic arm 210 and connected to the circuit board 200 for sensing the degree of deformation of the elastic arm 210;

[0046] The first capacitive touch button 300 has one end abutting against the free end 212 of the elastic arm 210 and the other end located within the deformation range of the pressing portion 110 , and is used to form and process a capacitive signal in the area where the pressing portion 110 is located.

[0047] In this embodiment, the conventional medical device key structure integrates the housing and key into an integral molding process, with the key integrated into a pressing portion on the housing. When a user presses the pressing portion, the pressing portion is deformed toward the sensing key inside the housing, thereby triggering the sensing key. The sensing key then sends a signal to the circuit board inside the housing, thereby controlling the handheld medical device. However, because the housing and pressing portion are integrally molded, if a user presses the periphery of a pressing portion on the housing or other adjacent pressing portions, the pressing portion may be deformed toward the sensing key due to the force exerted on the entire housing, resulting in the medical device key structure being accidentally activated.

[0048] The first capacitive touch button 300 is capable of forming a static capacitor in the area where the corresponding pressing portion 110 is located, and sensing the capacitance signal of the static capacitor. When the user does not touch the pressing portion 110, the static capacitor remains stable. When the user touches the pressing portion 110, the user's body electric field will affect the static capacitance of the first capacitive touch button 300, causing the static capacitance and its capacitance signal to change. The first capacitive touch button 300 then transmits the change in this capacitance signal to the circuit board 200, thereby achieving the function of controlling the triggering of the key structure 10 for medical devices. Therefore, even if the pressing portion 110 is deformed due to the force applied to the rest of the housing 100, if the user does not touch the first capacitive touch button 300, the key structure 10 for medical devices will not be triggered.

[0049] At the same time, the elastic arm 210 is elastic and can deform and bend under force. Because one end of the first capacitive touch button 300 abuts the elastic arm 210 and the other end is within the deformation range of the pressing portion 110, when the pressing portion 110 deforms, it drives the first capacitive touch button 300, causing the free end 212 of the elastic arm 210 to deform. After the elastic arm 210 deforms, the sensor 220 can collect deformation information of the elastic arm 210 and convert the deformation information of the elastic arm 210 into an electrical signal, which is transmitted to the circuit board 200 for reading by the circuit board 200. During the deformation process of the elastic arm 210, the free end 212 of the elastic arm 210 only changes position, but its shape remains essentially unchanged.

[0050] If the key structure 10 for medical devices is only provided with a sensing key, then when the user presses a larger area around or adjacent to the pressing portion 110, since the housing 100 and the pressing portion 110 are integrally formed, the deformation of the housing 100 as a whole will cause the pressing portion 110 to deform, thereby triggering the sensing key. That is, the pressure rod key will still be mistakenly triggered when the user does not press on the corresponding pressing portion 110. If only the first capacitive touch key 300 is provided, the user does not need to use the medical device key structure 10, but only lightly touches the pressing portion 110, which will cause the first capacitive touch key 300 to be triggered. In summary, the key structure 10 for medical devices that is only provided with the first capacitive touch key 300 or the sensing key is easily activated by mistake.

[0051] Therefore, in this embodiment, triggering the inductive key requires the user to apply a certain degree of force to the pressing portion 110, causing the pressing portion 110 to squeeze the first capacitive touch key 300 and deform the elastic arm 210. This ensures that the user has the intention to trigger the medical device key structure 10, preventing the first capacitive touch key 300 from being accidentally triggered. At the same time, the first capacitive touch key 300 forms a static capacitor in the area corresponding to the pressing portion 110, ensuring that the first capacitive touch key 300 can only be triggered when the user touches the pressing portion 110, preventing the inductive key from being accidentally triggered by the overall deformation of the housing 100. Therefore, the medical device key structure 10 will only be activated when and only when the first capacitive touch key 300 and its corresponding inductive key are triggered simultaneously. In other words, it is ensured that the user has the intention to activate and presses the correct position. Therefore, the medical device key structure 10 of the present invention can effectively prevent accidental touches.

[0052] It can be understood that the setting position of the first capacitive touch button 300 can be located within the positive projection range of the pressing part 110 on the circuit board 200, or one end of it can be connected to the circuit board 200 and the other end can extend to the position of the inner wall of the shell 100 corresponding to the pressing part 110, so as to form and process the capacitance signal of the pressing part 110.

[0053] For further information, please refer to Figure 2 and 3 The first capacitive touch button 300 is interference-fitted with the inner wall of the housing 100 .

[0054] In this embodiment, to avoid the user having to apply a large force on the pressing portion 110 to activate the medical device button structure 10, the first capacitive touch button 300 of the embodiment of the present application has an interference fit with the inner wall of the housing 100. This can be understood as the first capacitive touch button 300 abutting against the inner wall of the housing 100. In this case, the user only needs to lightly press the pressing portion 110 to cause the first capacitive touch button 300 to deform the elastic arm 210, thereby improving the user experience and efficiency.

[0055] Furthermore, the first capacitive touch button 300 is an elastic conductive member; or,

[0056] The first capacitive touch button 300 includes an elastic member and a conductive member. One end of the elastic member abuts against the elastic arm, and the other end abuts against the conductive member. The conductive member is located within the deformation range of the pressing portion.

[0057] In this embodiment, the elastic conductive member may be a conductive silicone, metal shrapnel, conductive sponge, or the like. The elastic member may be insulating silicone, rubber, or the like, and the conductive member may be copper foil, conductive cloth, or the like. The elastic conductive member, or a combination of the elastic and conductive members, can prevent the pressing portion 110 from being subjected to excessive instantaneous force, thereby preventing the elastic arm 210 from breaking, by deforming the elastic conductive member or the elastic member. When the first capacitive touch button 300 includes both an elastic member and a conductive member, the elastic member may be an insulating member, and only the conductive member is used to sense whether the user is touching the pressing portion.

[0058] For further information, please refer to Figure 6 The sensor 220 includes a Wheatstone bridge circuit, which includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first power supply terminal, a second power supply terminal, a first signal output terminal A1, and a second signal output terminal A2 connected in series in sequence;

[0059] The first power supply terminal is provided between the first resistor R1 and the fourth resistor R4, the second power supply terminal is provided between the second resistor R2 and the third resistor R3, the first signal output terminal A1 is provided between the fourth resistor R4 and the third resistor R3, and the second signal output terminal A2 is provided between the first resistor R1 and the second resistor 42;

[0060] At least two of the first resistor R1 , the second resistor R2 , the third resistor R3 and the fourth resistor R4 are strain gauge resistors.

[0061] In this embodiment, in the Wheatstone bridge circuit, at least two of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 are strain gauge resistors, which can change their resistance in response to strain in the material. When the free end 212 of the elastic arm 210 deforms, the strain gauge resistor within the sensor 220 also changes its resistance due to its own deformation. In the Wheatstone bridge circuit of this embodiment of the application, it can output a specific differential signal Vb through the first signal output terminal A1 and the second signal output terminal A2. When the pressing portion 110 is pressed, causing the elastic arm 210 to deform, this deformation will pass through the strain gauge resistor, changing the value of this differential signal Vb in the form of a change in resistance. The sensor 220 can then perform a threshold segmentation judgment on the differential signal Vb. By comparing the differential signal Vb with a specific threshold, it can determine whether the current state of the pressure-sensitive key is pressed or not pressed. For example, if the magnitude of the differential signal Vb exceeds the threshold, it can be determined that the key is pressed; if the signal does not exceed the threshold, it can be determined that the key is not pressed. By setting a modified Wheatstone bridge circuit in the sensor 220, the inductive button of the embodiment of the present application can accurately detect the situation where the pressing portion 110 is pressed, thereby preventing the user's skin from accidentally touching the pressing portion 110 to activate the medical device button structure 10.

[0062] It should be understood that after the sensor 220 detects the output differential signal Vb, the differential signal Vb can be amplified by the amplification processing circuit to enhance the strength of the differential signal Vb for better subsequent analysis and judgment.

[0063] For further information, please refer to Figures 1 to 3 The first capacitive touch button 300 includes a first conductive spring 310 and a first conductive column 320. The first conductive spring 310 is sleeved on the first conductive column 320, and one end of the first conductive spring abuts against the inner wall of the shell 100 where the pressing portion 110 is located, and the other end abuts against the first conductive column 320. The first conductive column 320 is connected to the circuit board 200.

[0064] In this embodiment, there is a distributed capacitance on the first conductive spring 310, which presents a static capacitance to the ground. Since the human body is a conductive material, when the user touches the pressing portion 110, the capacitance of the human body will be coupled to the static capacitance, thereby causing the static capacitance to change. The first conductive column 320 can play a role in positioning the first conductive spring 310 and transmitting current to the first conductive spring 310. It should be understood that when the first conductive column 320 is connected to the elastic arm 210 of the sensing button, it can be regarded as the first conductive column 320 being connected to the circuit board 200 through the elastic arm 210. Because the first conductive column 320 is fixed to the circuit board 200, it can play a role in positioning the first conductive spring 310 and conducting current.

[0065] For further information, please refer to Figures 1 to 3 The first conductive spring 310 includes a first sub-conductive spring 311 and a second sub-conductive spring 312 connected to each other. The first sub-conductive spring 311 abuts against the first conductive column 320, and along the compression direction of the first sub-conductive spring 311, the diameter of the first sub-conductive spring 311 is equal. The second sub-conductive spring 312 abuts against the inner wall of the shell 100, and along the direction from the first sub-conductive spring 311 to the shell 100, the diameter of the second sub-conductive spring 312 gradually increases.

[0066] In this embodiment, the diameter of the first conductive spring 310 near the pressing portion 110 affects the area where the static capacitance generated by the first conductive spring 310 can couple with external capacitance. The first sub-conductive spring 311 of this embodiment has a uniform diameter at all locations and is positioned within the first conductive post 320, thereby preventing the first sub-conductive spring 311 from falling off the first conductive post 320 and thereby increasing the service life of the medical device key structure 10. Furthermore, the diameter of the second sub-conductive spring 312 gradually increases from the first sub-conductive spring 311 to the housing 100, thereby increasing the area where the static capacitance can couple with external capacitance. This, while occupying a smaller space on the circuit board 200, increases the area and efficiency with which a user can trigger the first capacitive touch key 300.

[0067] For further information, please refer to Figure 2 and Figure 3 The first conductive column 320 includes a column 321 and an annular protrusion 322. The annular protrusion 322 is arranged on the side wall of the column 321. At least part of the column 321 passes through the circuit board 200. The annular protrusion 322 abuts against the circuit board 200 and is located between the circuit board 200 and the first conductive spring 310. The first conductive spring 310 is sleeved on the column 321 and abuts against the annular protrusion 322.

[0068] In this embodiment, the annular protrusion 322 can absorb the pressure exerted on the first conductive spring 310, thereby preventing the first conductive spring 310 from directly transmitting the pressure to the circuit board 200. At the same time, the inner diameter of the first conductive spring 310 is generally larger than the outer diameter of the column 321. Therefore, the inner wall of the first conductive spring 310 may not contact the column 321. Therefore, the annular protrusion 322 can also keep the first conductive spring 310 continuously charged.

[0069] For further information, please refer to Figure 2 and 4The medical device key structure 10 further includes a second capacitive touch key 800. The housing 100 is provided with a plurality of pressing portions 110. The second capacitive touch key 800 and the first capacitive touch key 300 correspond to different pressing portions 110, respectively, and a gap exists between the second capacitive touch key 800 and the first capacitive touch key 300.

[0070] The second capacitive touch button includes a second conductive column 810, which includes a first sub-conductive column 811 and a second sub-conductive column 812. The first sub-conductive column 811 is connected to the circuit board, and the second sub-conductive column 812 is located within the deformation range of the pressing portion 110. Along the direction from the first sub-conductive column 811 to the housing, the cross-sectional area of ​​at least part of the second sub-conductive column 812 is greater than the cross-sectional area of ​​the first sub-conductive column 811.

[0071] In this embodiment, the cross-sectional area of ​​at least part of the second sub-conductive column 812 is larger than the cross-sectional area of ​​the first sub-conductive column 811, which can increase the area size of the static capacitance of the first capacitive touch button 300 while avoiding occupying too large an area of ​​the PCB board. It should be understood that the first sub-conductive column 811 and the second sub-conductive column 812 can be formed as one piece to reduce assembly costs, or they can be connected to each other to form a second conductive column 810. When the first sub-conductive column 811 and the second sub-conductive column 812 are connected and assembled to form the second conductive column 810, the second sub-conductive column 812 can be a sheet-like structure or an inverted cone-shaped conductive sheet, which is used to sense whether the user's body is in contact with the pressing portion. The second capacitive touch button 800 can also be as Figure 1 As shown, it includes a second conductive spring 820 and a second conductive column 810. It should be understood that the second capacitive touch button 800 and the first capacitive touch button 300 can be located at different positions on the circuit board 200.

[0072] For further information, please refer to Figure 2 and 4 , there is a clearance fit between the second conductive column 810 and the housing 100 .

[0073] In this embodiment, the clearance fit between the second conductive pillar 810 and the housing 100 can ensure that the PCB board with the second conductive pillar 810 will not collide with the housing 100 during installation, thereby improving the assembly efficiency of the key structure 10 for medical devices.

[0074] It should be understood that, at the position corresponding to the pressing portion 110 that needs to be efficiently started / closed and plays the role of a switch, a position such as Figure 3 The first capacitive touch button 300 shown as having an interference fit with the inner wall of the housing 100 may be provided with a corresponding position of the pressing portion 110 for adjusting power / switching mode. Figure 4The second capacitive touch button 800 shown is loosely fitted with the housing 100 , thereby improving the user experience.

[0075] In this embodiment, since the handheld medical device includes the medical device button structure 10 of any one of the embodiments, the combination of the first capacitive touch button 300 and the induction button can ensure that the medical device button structure 10 is only activated when the user touches the pressing part 110, thereby achieving the effect of avoiding accidental touch.

[0076] For further information, please refer to Figure 1 、 Figure 2 and Figure 8 The key structure 10 for medical devices further includes a circuit assembly 600 , which is located in the accommodating cavity. The circuit board 200 is connected to the circuit assembly 600 , and the circuit assembly 600 is provided with a guide block 630 .

[0077] The inner side wall of the accommodating cavity is provided with a guide channel 150 , and the guide block 630 is located in the guide channel 150 . The guide channel 150 and the guide block 630 cooperate to guide the relative movement of the circuit assembly 600 and the housing 100 .

[0078] In this embodiment, when assembling the key structure 10 for medical devices, it is necessary to place multiple components, including the circuit board 200, inside the housing 100. To improve the assembly efficiency of the key structure 10 for medical devices, this embodiment connects the circuit board 200 and the circuit assembly 600, that is, the components have been assembled. When assembling the key structure 10 for medical devices, it is only necessary to insert the circuit assembly 600 and the circuit board 200 as a whole into the accommodating cavity to quickly complete the installation, thereby effectively improving the assembly efficiency of the key structure 10 for medical devices. At the same time, the cooperation between the guide channel 150 and the guide block 630 enables the circuit assembly 600 to enter the accommodating cavity according to a preset path, preventing the circuit assembly 600 and the circuit board 200 as a whole from deviating from the predetermined position during movement, thereby preventing the pressing portion 110 from malfunctioning or easily slipping.

[0079] For further information, please refer to Figure 1 、 Figures 2 to 7 The housing 100 is provided with an opening, which connects the accommodating cavity and the external environment. The circuit assembly 600 further includes a charging interface 620 and a battery 610. The charging interface 620 and the battery 610 are both located at one end close to the opening.

[0080] The key structure 10 for medical devices further includes a sealing assembly 400 , which is detachably connected to the housing 100 , abuts against the battery 610 and the charging port 620 , and seals the opening.

[0081] In this embodiment, the key structure 10 for medical devices also needs to be capable of charging, so its circuit assembly 600 includes a charging interface 620 and a battery 610. To facilitate connection between the charging interface 620 and an external charging cable, the charging interface 620 is located at the end where the opening is located. The sealing assembly 400 can seal the opening 101, thereby preventing external moisture from entering the receiving cavity and causing damage to 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, thereby completing charging. It should be understood that the charging interface 620 can be a USB interface.

[0082] For further information, please refer to Figure 1 、 Figures 2 to 7 The sealing assembly 400 includes a sealing body 420 and a charging cover 410. The outer wall of the sealing body 420 abuts against the inner wall of the accommodating cavity. A charging hole 60 is provided on the side of the sealing body 420 away from the accommodating cavity. The charging hole 60 is connected to the charging interface 620.

[0083] The charging cover 410 is elastic and includes a covering portion 411 and a connecting portion 412. The covering portion 411 is located in the charging hole 60 and has an 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 body 420 and the covering portion 411.

[0084] In this embodiment, the sealing body 420 seals the space except for the charging port 620. Because the charging cover 410 is elastic and the connecting portion 412 is located at one end of the sidewall of the covering portion 411 that opens into the charging port 60, the covering portion 411 can rotate relative to the charging port 60 about the connection between the covering portion 411 and the connecting portion 412, that is, tilting away from the charging port 60, thereby exposing the charging port 620 to the external environment and enabling charging. After charging is complete, the charging port 620 can be quickly switched between the exposed and sealed states by inserting the covering portion 411 into the charging port 60.

[0085] For further information, please refer to Figure 1 、 Figures 2 to 7 A sealed cavity 20 is defined between the charging port 620, the battery 610, and the inner sidewall of the accommodating cavity. The sealing body 420 includes a first sealing body 421 and a second sealing body 422. The first sealing body 421 is located within the sealed cavity 20. An installation cavity 30 is formed between the first sealing body 421, the second sealing body 422, and the inner sidewall of the accommodating cavity. The installation cavity 30 is connected to the charging port 60.

[0086] 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 , which is installed in the installation cavity 30 with an interference fit to seal the installation cavity 30 .

[0087] In this embodiment, the first sealing body 421 serves to seal the 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 tilting and stretching of the covering portion 411, a mounting cavity 30 needs to be designed, 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, then gradually flow toward 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 liquid from flowing from the mounting cavity 30 to the side wall of the accommodating cavity, thereby improving the sealing performance of the key structure 10 for medical devices.

[0088] For further information, please refer to Figure 1 、 Figures 2 to 7 The first sealing body 421 is provided with a first sealing protrusion 423, and 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,

[0089] A hook is provided at one end of the connecting portion 412 away from the covering, and the hook is engaged with the first sealing body 421; and / or,

[0090] The sealing assembly 400 further includes a first sealing ring 40, which is clamped between the side wall of the sealing body 420 and the inner side wall of the accommodating cavity and has an interference fit with the sealing body 420 and the side wall of the accommodating cavity; and / or,

[0091] 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.

[0092] 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 the liquid from flowing from the gap formed by the sealing plug 700 and the first body and the second body to the side wall of the accommodating cavity.

[0093] After a hook is provided at one end of the connecting portion 412 , the hook can play an effective fixing role, thereby preventing the charging cover 410 from being separated from the sealing assembly 400 during the process of the covering portion 411 being tilted and turned over.

[0094] The first sealing ring 40 and the second sealing ring 50 can respectively improve the sealing between the sealing body 420 and the side wall of the accommodating cavity and the sealing between the charging interface 620 and the first sealing body 421 .

[0095] Further references Figure 1 、 Figure 2 and Figure 10 The present application also provides a handheld medical device. The handheld medical device includes the medical device key structure 10 described in the above embodiment.

[0096] For further information, please refer to Figure 2 、 8 and Figure 9 The handheld medical device also includes a bracket 500, which includes a base 520 and a support member 510 connected to each other. The support member 510 is provided with a placement groove 511 in a direction away from the base 520. The placement groove 511 is adapted to the shape of the shell 100. The inner wall of the placement groove 511 is provided with a fixing protrusion 512. The shell 100 is provided with a fixing groove 130, and the fixing protrusion 512 is inserted into the fixing groove 130.

[0097] In this embodiment, during operation, the user of the medical device key structure 10 may need to temporarily place the housing 100 to handle other matters or observe the surgical status. The housing 100 needs to be protected from contact with external devices, thereby preventing water ingress, dust, and bacteria. In this case, the bracket 500 can support the housing 100. Specifically, the base 520 provides stability, and the support member 510 is used to place the housing 100 in the placement groove 511, so that the fixing protrusion 512 and the fixing groove 130 cooperate to prevent the housing 100 from sliding in the placement groove 511.

[0098] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0099] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they 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 disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

[0100] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, combinations, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present application, and that 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 medical device key structure includes: A housing is formed with a receiving cavity inside the housing, and a pressing portion is integrally formed on the housing, and the pressing portion is elastic; a circuit board, the circuit board being located in the accommodating cavity; A sensing button, the sensing button comprising a sensor and an elastic arm connected to each other, one end of the elastic arm being fixed, at least part of the sensor being disposed at the fixed end of the elastic arm and connected to the circuit board for sensing the degree of deformation of the elastic arm; A first capacitive touch button, one end of which abuts against the free end of the elastic arm and the other end of which is located within the deformation range of the pressing portion, is used to form and process a capacitive signal in the area where the pressing portion is located.

2. The key structure for medical equipment according to claim 1, characterized in that: The first capacitive touch button is interference-fitted with the inner wall of the housing.

3. The key structure for medical equipment according to claim 1, wherein: The first capacitive touch button includes an elastic conductive member, one end of the elastic conductive member abuts against the free end of the elastic arm, and the other end is located within the deformation range of the pressing portion; or, The first capacitive touch button includes an elastic member and a conductive member. One end of the elastic member abuts against the elastic arm, and the other end abuts against the conductive member. The conductive member is located within the deformation range of the pressing portion.

4. The key structure for medical equipment according to claim 2, characterized in that: The sensor includes a Wheatstone bridge circuit, which includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first power supply terminal, a second power supply terminal, a first signal output terminal, and a second signal output terminal connected in series in sequence; The first power supply terminal is provided between the first resistor R1 and the fourth resistor R4, the second power supply terminal is provided between the second resistor R2 and the third resistor R3, the first signal output terminal is provided between the fourth resistor R4 and the third resistor R3, and the second signal output terminal is provided between the first resistor R1 and the second resistor R2; At least two of the first resistor R1 , the second resistor R2 , the third resistor R3 and the fourth resistor R4 are strain gauge resistors.

5. The key structure for medical equipment according to claim 1, wherein: The first capacitive touch button includes a first conductive spring and a first conductive column. The first conductive spring is sleeved on the first conductive column, and one end of the first conductive spring abuts against the inner wall of the shell where the pressing part is located, and the other end abuts against the first conductive column. The first conductive column is connected to the circuit board.

6. The key structure for medical equipment according to claim 5, characterized in that: The first conductive spring includes a first sub-conductive spring and a second sub-conductive spring connected to each other. The first sub-conductive spring abuts against the conductive column, and the diameters of the first sub-conductive springs are equal along the compression direction of the first sub-conductive spring. The second sub-conductive spring abuts against the inner wall of the outer shell, and the diameter of the second sub-conductive spring gradually increases along the direction from the first sub-conductive spring to the outer shell.

7. The key structure for medical equipment according to claim 5, characterized in that: The first conductive column includes a column and an annular protrusion, the annular protrusion is arranged on the side wall of the column, at least part of the column passes through the circuit board, the annular protrusion abuts the circuit board, and is located between the circuit board and the first conductive spring, the first conductive spring is sleeved on the column and abuts the annular protrusion.

8. The key structure for medical equipment according to claim 1, wherein: The key structure for medical equipment further includes a second capacitive touch key, the housing is provided with a plurality of pressing portions, the second capacitive touch key and the first capacitive touch key correspond to different pressing portions, and a gap is formed between the second capacitive touch key and the first capacitive touch key; The second capacitive touch button includes a second conductive column, which includes a first sub-conductive column and a second sub-conductive column. The first sub-conductive column is connected to the circuit board, and the second sub-conductive column is located within the deformation range of the pressing portion. Along the direction from the first sub-conductive column to the housing, the cross-sectional area of ​​at least part of the second sub-conductive column is greater than the cross-sectional area of ​​the first sub-conductive column.

9. The key structure for medical equipment according to claim 8, characterized in that: The second conductive column and the housing are clearance-fitted.

10. 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 9.

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