Foot switch device and oral medical equipment

Abstract

The invention belongs to the technical field of medical equipment, and relates to a foot switch device and oral cavity medical equipment, the foot switch device comprises a button assembly, a pedal assembly, a first mounting plate, a power supply assembly and a second mounting plate; the key assembly comprises a key unit and a circuit unit; the first mounting plate is fixedly connected with the second mounting plate, and an accommodating cavity is formed between the first mounting plate and the second mounting plate; the power supply assembly and the circuit unit are arranged in the containing cavity, the circuit unit is provided with an elastic conducting strip matched with the key unit to work, the elastic conducting strip is provided with an integrally-formed sealing structure, and the circuit unit is connected with the first mounting plate in a sealed mode through the sealing structure. The key unit and the pedal assembly are arranged on the side, away from the second mounting plate, of the first mounting plate side by side. According to the invention, the sealing structure integrally formed on the elastic conducting strip in the circuit unit can form a continuous sealing effect in the foot switch.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and more specifically, to a foot switch device and oral medical equipment. Background Art

[0002] In dental surgical procedures such as dental implants and root canal treatments, surgical instruments are usually equipped with wired pedals. Doctors implement instrument functions by stepping on program buttons on the pedals. The lengthy instrument connection cables reduce flexibility during surgery and are not convenient for postoperative cleanup.

[0003] In this context, wireless foot pedals have gained wide application prospects. Existing wireless foot pedals use wireless receiving modules to communicate with wireless acquisition modules, and collect signal changes through the wireless acquisition module to control the program. Specifically, the wireless acquisition module collects the on and off status of the micro switch in the wireless foot pedal and sends a signal to the wireless receiving module to control the start and stop of the program.

[0004] When the push rod inside the pedal contacts the micro switch and moves relative to each other, the micro switch sends a control signal, and the spring inside the push rod plays a role of reset, thus realizing the function of stepping on the pedal and releasing the foot to short-circuit. However, the micro switch will have the problem of sealing failure after long-term use. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is that the sealing of the micro switch in the prior art may fail after long-term use.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a foot switch device, including a button assembly, a pedal assembly, a first mounting plate, a power supply assembly, and a second mounting plate;

[0007] The key assembly includes a key unit and a circuit unit;

[0008] The first mounting plate and the second mounting plate are fixedly connected to form a receiving cavity therebetween;

[0009] The power supply assembly and the circuit unit are arranged in the accommodating cavity, and the circuit unit has an elastic conductive sheet that cooperates with the button unit, the elastic conductive sheet is provided with an integrally formed sealing structure, and the circuit unit is sealed and connected to the first mounting plate via the sealing structure, and the button unit and the pedal assembly are arranged side by side on a side of the first mounting plate away from the second mounting plate.

[0010] Further, the sealing structure includes a first sealing portion;

[0011] The circuit unit further includes a circuit board, the elastic conductive sheet is arranged between the circuit board and the first mounting plate, and the first sealing portion is arranged on a side of the elastic conductive sheet facing the first mounting plate;

[0012] The first mounting plate and the circuit board cooperate to continuously squeeze the first sealing portion, and the first sealing portion is deformed under pressure to seamlessly fit the first mounting plate.

[0013] Furthermore, the sealing structure further includes a second sealing portion;

[0014] The second sealing portion is provided on a side of the elastic conductive sheet facing the circuit board;

[0015] The first mounting plate and the circuit board cooperate to continuously press the second sealing portion, and the second sealing portion is deformed under pressure to seamlessly fit the circuit board.

[0016] Furthermore, in the thickness direction of the elastic conductive sheet, the first sealing portion is disposed at a position directly opposite to the second sealing portion.

[0017] Further, the first mounting plate is provided with a first through hole;

[0018] The first sealing portion and the second sealing portion are annular sealing ribs protruding from a surface portion of the elastic conductive sheet, and a diameter of the annular sealing rib is greater than a diameter of the first through hole.

[0019] Furthermore, a plurality of positioning posts are arranged on the first mounting plate around the first through hole, the elastic conductive sheet has positioning holes corresponding to the positioning posts, and the positioning posts pass through the positioning holes and are fixedly connected to the circuit board.

[0020] Furthermore, the elastic conductive sheet is an overall conductive silicone sheet;

[0021] The elastic conductive sheet has a first recessed portion on one side facing the circuit board, the first recessed portion forming a deformation space of the elastic conductive sheet, and in a longitudinal section of the first recessed portion, an angle between an extension line of the wall of the first recessed portion and an extension line of the end face is 15° to 25°.

[0022] Further, the button unit comprises a button, a reset member and a push rod, the push rod is coaxially connected to the button, the reset member is sleeved on the push rod, and two ends of the reset member respectively abut against the button and the first mounting plate;

[0023] The push rod and the elastic conductive sheet are arranged opposite to the first through hole. When the key is subjected to force, the push rod passively passes through the first through hole, pushing the elastic conductive sheet to contact the circuit board to form a path, and retreats with the help of the reset member when the key loses force, and the elastic conductive sheet is separated from the circuit board to restore the circuit break;

[0024] The elastic conductive sheet has a butt-joint portion on one side facing the push rod corresponding to the position of the first recessed portion; the butt-joint portion is coaxially arranged with the push rod, and the diameter of the butt-joint portion is greater than the end face diameter of the push rod.

[0025] Furthermore, the elastic conductive sheet has a second recessed portion on one side facing the top rod;

[0026] The second recessed portion is arranged around the abutting top portion, and the recessed depth of the second recessed portion is smaller than that of the first recessed portion;

[0027] The portion of the elastic conductive sheet between the first recessed portion and the second recessed portion has a thickness smaller than that of the abutting portion.

[0028] An embodiment of the present invention further provides an oral medical device, comprising the above-mentioned foot switch device.

[0029] Compared with the prior art, the embodiments of the present invention mainly have the following beneficial effects:

[0030] The foot switch device of the present invention sets the circuit unit in the accommodating cavity, which can effectively protect the circuit unit. The circuit unit is sealed and connected to the first mounting plate through a sealing structure. Since the button unit is set on the side of the first mounting plate away from the second mounting plate, it can be known that the button unit and the circuit unit are respectively set on both sides of the first mounting plate, so that the first mounting plate and the sealing structure cooperate with each other to isolate the button unit and the circuit unit in space, thereby reducing the influence of dust, water vapor, etc. on various components in the circuit unit when the button unit is operated on one side of the first mounting plate. On this basis, the sealing structure is a structure integrally formed on the elastic conductive sheet. When the elastic conductive sheet is fixed, the corresponding sealing structure will be continuously fixed, and assembly failure or wear failure will not occur due to the impact of the button unit, thereby forming a continuous sealing effect inside the foot switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1is a schematic structural diagram of a foot switch device according to an embodiment of the present invention;

[0033] Figure 2 is a bottom view of a foot switch device according to an embodiment of the present invention;

[0034] Figure 3 yes Figure 1 An exploded schematic diagram of the foot switch device shown;

[0035] Figure 4 is a schematic structural diagram of a first mounting plate according to an embodiment of the present invention;

[0036] Figure 5 is a top view of a foot switch device according to an embodiment of the present invention;

[0037] Figure 6 yes Figure 5 A cross-sectional view along AA in FIG.

[0038] Figure 7 yes Figure 6 The enlarged schematic diagram of point B in FIG.

[0039] Figure 8 4 is a cross-sectional schematic diagram of an elastic conductive member according to an embodiment of the present invention.

[0040] Reference numerals:

[0041] 100-button assembly; 110-button unit; 120-circuit unit; 200-pedal assembly; 300-first mounting plate; 310-accommodating chamber; 400-power supply assembly; 500-second mounting plate; 320-first through hole; 111-button; 112-top rod; 113-reset member; 114-limiting shell; 114a-limiting through hole; 121-circuit board; 122-elastic conductive sheet; 122a-sealing structure; 1221-first sealing part; 1222-second sealing part; 122b-first recessed part; 122c-top; 122d-second recessed part; 330-positioning column. DETAILED DESCRIPTION

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] The embodiment of the present invention provides a foot switch device, such as Figures 1 to 8 As shown, it includes a button assembly 100, a pedal assembly 200, a first mounting plate 300, a power supply assembly 400 and a second mounting plate 500.

[0045] The key assembly 100 includes a key unit 110 and a circuit unit 120;

[0046] The first mounting plate 300 and the second mounting plate 500 are fixedly connected to form a receiving cavity 310 therebetween;

[0047] The power supply assembly 400 and the circuit unit 120 are arranged in the accommodating cavity 310, and the circuit unit 120 has an elastic conductive sheet 122 that cooperates with the button unit 110. Specifically, when the structure in the button unit 110 contacts the elastic conductive sheet 122, the foot switch device is activated, and when separated, it is closed. The elastic conductive sheet 122 is provided with an integrally formed sealing structure 122a, and the circuit unit 120 is sealed and connected to the first mounting plate 300 through the sealing structure 122a. The button unit 110 and the pedal assembly 200 are arranged in parallel on a side of the first mounting plate 300 away from the second mounting plate 500. The button unit 110 can partially pass through the first mounting plate 300 to contact the circuit unit 120. In this embodiment, the elastic conductive sheet 122 is provided with an integrally formed sealing structure 122a, which means that the elastic conductive sheet 122 is formed by integral molding, and after integral molding, the elastic conductive sheet 122 has a sealing structure 122a.

[0048] The foot switch device of the present invention arranges the circuit unit 120 in the accommodating cavity 310, which can effectively protect the circuit unit 120. The circuit unit 120 is sealed and connected to the first mounting plate 300 through the sealing structure 122a. Since the button unit 110 and the circuit unit 120 are respectively arranged on both sides of the first mounting plate 300, the first mounting plate 300 and the sealing structure 122a cooperate with each other to spatially isolate the button unit 110 and the circuit unit 120, thereby reducing the influence of dust, water vapor, etc. on the electronic devices in the circuit unit 120 when the button unit 110 is operated on one side of the first mounting plate 300. On this basis, the sealing structure 122a is a structure integrally formed on the elastic conductive sheet 122. When the elastic conductive sheet 122 is fixed, the sealing structure 122a will be continuously fixed accordingly, and assembly failure or wear failure will not occur due to the impact of the button unit 110, thereby forming a continuous sealing effect inside the foot switch.

[0049] In one embodiment, Figures 5 to 8 As shown, the sealing structure 122a includes a first sealing portion 1221. Specifically, the circuit unit 120 also includes a circuit board 121. The elastic conductive sheet 122 is arranged between the circuit board 121 and the first mounting plate 300. The first sealing portion 1221 is arranged on the side of the elastic conductive sheet 122 facing the first mounting plate 300. In this embodiment, the first mounting plate 300 and the circuit board 121 cooperate to continuously squeeze the first sealing portion 1221, and the first sealing portion 1221 is deformed under pressure to seamlessly fit the first mounting plate 300. In this embodiment, after the elastic conductive sheet 122 is fixedly installed, the first sealing portion 1221 continuously forms a seal, and the first sealing portion 1221 will not be displaced or fall off due to the squeezing or impact of the elastic conductive sheet 122 by the button unit 110, and the first sealing portion 1221 will not be worn, so that a sealed environment can be effectively formed for a long time.

[0050] In one embodiment, Figure 3 and Figures 4 to 7 As shown, the first mounting plate 300, the elastic conductive sheet 122 and the circuit board 121 are arranged adjacent to each other in sequence, and the sealing structure 122a also includes a second sealing portion 1222; specifically, the second sealing portion 1222 is arranged on the side of the elastic conductive sheet 122 facing the circuit board 121; the first mounting plate 300 and the circuit board 121 cooperate to continuously squeeze the second sealing portion 1222, and the second sealing portion 1222 is deformed under pressure to seamlessly fit the circuit board 121, thereby effectively forming a sealed environment.

[0051] In the above embodiment, the first sealing portion 1221 and the second sealing portion 1222 are part of the elastic conductive sheet 122. When the elastic conductive sheet 122 is not removed, the first sealing portion 1221 and the second sealing portion 1222 will not fail due to long-term use, and can be continuously squeezed to maintain the sealing effect for a long time, so that the foot switch device has good sealing for a long time, and the service life will be extended, which can effectively improve the dustproof and waterproof performance of the button unit 110. In addition, since the first sealing portion 1221 and the second sealing portion 1222 are part of the elastic conductive sheet 122, they are used for sealing, the structure is simple, and it is easy to assemble.

[0052] In one embodiment, Figure 3 and Figures 4 to 8 As shown, the first mounting plate 300 is provided with a first through hole 320, and the first sealing portion 1221 and the second sealing portion 1222 are both annular sealing ribs formed by partially protruding from the surface of the elastic conductive sheet 122, and the diameter of the first sealing portion 1221 facing the first mounting plate 300 is larger than the diameter of the first through hole 320, so that the gap between the assembly surface of the elastic conductive sheet 122 and the first mounting plate 300 can be sealed, and at the same time, the first sealing portion 1221 facing the circuit board 121 can seal the gap between the assembly surface of the elastic conductive sheet 122 and the circuit board 121, and the cooperation of the two can prevent external moisture and dust from entering the circuit board 121 from one side of the button unit 110, and also effectively protect the circuit components and extend the service life of the foot switch device.

[0053] In one embodiment, Figure 8 As shown, in the thickness direction of the elastic conductive sheet 122, the setting position of the first sealing portion 1221 is opposite to the setting position of the second sealing portion 1222. Since the positions of the first sealing portion 1221 and the second sealing portion 1222 are opposite, when the first mounting plate 300 and the circuit board 121 squeeze the elastic conductive sheet 122, the pressure can be concentrated on the first sealing portion 1221 and the second sealing portion 1222, so that the first sealing portion 1221 and the second sealing portion 1222 can be more closely attached to the first mounting plate 300 and the circuit board 121, respectively, and the sealing effect is better.

[0054] In the above embodiment, the first sealing portion 1221 and the second sealing portion 1222 are provided on the elastic conductive sheet 122, which can respectively seal the assembly gap between the elastic conductive sheet 122 and the first mounting plate 300 and the assembly gap between the elastic conductive sheet 122 and the circuit board 121, thereby having a simple structure and being easy to assemble.

[0055] In the embodiment of the present invention, the button assembly 100 may include a plurality of button units 110, for example Figure 1 The foot switch device shown has three button units 110, each button unit 110 shares a circuit unit 120, and accordingly, the embodiment has a plurality of elastic conductive sheets 122. For the plurality of button units 110, each button unit 110 corresponds to an elastic conductive sheet 122, and each button unit 110 can control different working programs. When the foot switch device in the embodiment works, firstly, the pedal of the pedal assembly 200 is stepped on to turn on the foot switch device, and then the program control of the target end is realized by operating the button unit 110.

[0056] In one embodiment, referring back to Figure 3 and Figure 4 As shown, the key unit 110 includes a key 111, a push rod 112 and a reset member 113, the push rod 112 is coaxially connected to the key 111, the reset member 113 is sleeved on the push rod 112, and the two ends are respectively pressed against the key 111 and the first mounting plate 300; the push rod 112 and the elastic conductive sheet 122 are arranged opposite to the first through hole 320, and the push rod 112 passively passes through the first through hole 320 when the key 111 is subjected to force, until the end plane of the push rod 112 touches the elastic conductive sheet 122, and pressure is applied to the elastic conductive sheet 122, so as to push the elastic conductive sheet 122 to deform and contact the circuit board 121 to form a passage, and when the key 111 loses force, the reset member 113 is used to reset the key 111. Retraction. During the retraction and resetting process, since the two ends of the resetting member 113 respectively abut against the button 111 and the first mounting plate 300, and the resetting member 113 is sleeved on the top rod 112, the top rod 112 will not get stuck during the resetting process, and the elastic conductive sheet 122 is separated from the circuit board 121 to restore the circuit break. The loss of force of the button 111 refers to the disappearance of the external force acting on the button 111. The button unit 110 provided in this embodiment has a simple and compact structure, so that the foot switch device has the advantages of small size and low manufacturing cost. Combined with the first sealing portion 1221 and the second sealing portion 1222 on the elastic conductive sheet 122 arranged between the circuit board 121 and the first mounting plate 300, the foot switch device also has a long-term sealing effect.

[0057] In this embodiment, in the initial assembly state, the end face of the top rod 112 and the surface of the elastic conductive sheet 122 are in contact, so that the elastic conductive sheet 122 has a certain amount of compression, which enables the elastic conductive sheet 122 to always maintain a compressed state, avoiding assembly errors that lead to a large gap between the top rod 112 and the elastic conductive sheet 122, which is beneficial to maintaining the resilience of the elastic conductive sheet 122, that is, it can ensure assembly accuracy and have a good rebound effect. In addition, since the end face of the top rod 112 and the surface of the elastic conductive sheet 122 are initially in contact, the foot switch device can realize the switch function at the moment the button 111 is pressed.

[0058] In a specific embodiment, the reset member 113 is a reset spring, which can provide a restoring force so that the button 111 and the top rod 112 can rebound after being pressed.

[0059] In one embodiment, Figure 3 As shown, the button unit 110 further includes a limit housing 114 connected to the first mounting plate 300, the limit housing 114 is provided with a limit through hole 114a, one end of the button 111 is connected to the top rod 112, and the other end passes through the limit through hole 114a and extends out of the limit housing 114. The limit housing 114 is used to limit the stroke of the button 111 to avoid excessive stroke, and prevent the button 111 from moving left and right and forward and backward, so that the button 111 can quickly act on the elastic conductive sheet 122, and the trigger response is fast and accurate.

[0060] In one embodiment, Figure 4 As shown, a plurality of positioning posts 330 are arranged around the first through hole 320 on the first mounting plate 300, and the elastic conductive sheet 122 has positioning holes (not shown in the figure) corresponding to the positioning posts 330, and the positioning posts 330 pass through the positioning holes and are fixedly connected to the circuit board 121. The number of the positioning holes is at least three, which are evenly distributed along the circumference of the first through hole 320, so as to effectively position the elastic conductive sheet 122. In an optional embodiment, the end face of the positioning post 330 is provided with a countersunk hole or the positioning post 330 is provided with a through hole along the axial direction, and a fixing member passing through the circuit board 121 is fixedly connected to the positioning post 330 through the countersunk hole or the through hole, so as to fix the elastic conductive sheet 122 between the first mounting plate 300 and the circuit board 121.

[0061] In one embodiment, the elastic conductive sheet 122 is an overall conductive silicone sheet, which may be circular, square, or other polygonal. Figure 8As shown, the elastic conductive sheet 122 has a first recessed portion 122b on the side facing the circuit board 121, and the first recessed portion 122b forms a deformation space for the elastic conductive sheet 122. When the top rod 112 passes through the first through hole 320 to apply pressure to the elastic conductive sheet 122, the space of the first recessed portion 122b will be squeezed until the elastic conductive sheet 122 comes into contact with the circuit board 121 to form a passage.

[0062] In this embodiment, in the longitudinal section of the first recessed portion 122b, the angle α between the extension line of the wall of the first recessed portion 122b and the extension line of the end face is 15° to 25°. By setting the angle within this range, the extrusion deformation and the restoration after the pressure is released of the elastic conductive sheet 122 are smoother, which is conducive to achieving efficient rebound of the elastic conductive sheet 122.

[0063] In one embodiment, Figure 8 As shown, the elastic conductive sheet 122 has a top portion 122c corresponding to the position of the first recessed portion 122b on the side facing the ejector rod 112, and the top portion 122c is the portion of the elastic conductive sheet 122 that directly contacts the ejector rod 112, and the top portion 122c is coaxially arranged with the ejector rod 112, and the diameter of the top portion 122c is larger than the end face diameter of the ejector rod 112, so that the force of the ejector rod 112 acting on the elastic conductive sheet 122 is more concentrated, and the elastic conductive sheet 122 can be quickly deformed to contact the circuit board 121 to form a path, so that the key response speed is faster, and it is also beneficial for the top portion 122c of the elastic conductive sheet 122 to rebound quickly after losing force, and the loss of force means that after the ejector rod 112 is reset, the top portion 122c is no longer affected by external force.

[0064] In one embodiment, Figure 8 As shown, the elastic conductive sheet 122 also has a second recessed portion 122d on the side facing the top rod 112; the second recessed portion 122d is arranged around the abutting top portion 122c, and the recessed depth of the second recessed portion 122d is smaller than that of the first recessed portion 122b; the portion of the elastic conductive sheet 122 between the first recessed portion 122b and the second recessed portion 122d has a thickness less than that of the abutting top portion 122c, which helps the abutting top portion 122c to deform quickly and contact the circuit board 121 to form a path, and the key response speed is faster.

[0065] In one embodiment, the power supply assembly 400 is also sealed to the first mounting plate 300, which can further improve the continuous sealing performance inside the foot switch. In this embodiment, the power supply assembly 400 adopts a battery compartment design, and a battery is installed in the battery compartment to power other components in the foot switch device.

[0066] An embodiment of the present invention further provides an oral medical device, including the above-mentioned foot switch device, and having corresponding technical effects, which will not be elaborated here.

[0067] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

[0068] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention 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 invention more thorough and comprehensive. Although the present invention 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 recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

[0069] Although embodiments of the present invention 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 spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A foot switch device, characterized in that: It includes a button assembly, a pedal assembly, a first mounting plate, a power supply assembly and a second mounting plate; The key assembly includes a key unit and a circuit unit; The first mounting plate and the second mounting plate are fixedly connected to form a receiving cavity therebetween; The power supply assembly and the circuit unit are arranged in the accommodating cavity, and the circuit unit has an elastic conductive sheet that cooperates with the button unit, the elastic conductive sheet is provided with an integrally formed sealing structure, and the circuit unit is sealed and connected to the first mounting plate via the sealing structure, and the button unit and the pedal assembly are arranged side by side on a side of the first mounting plate away from the second mounting plate.

2. The foot switch device according to claim 1, characterized in that: The sealing structure comprises a first sealing portion; The circuit unit further includes a circuit board, the elastic conductive sheet is arranged between the circuit board and the first mounting plate, and the first sealing portion is arranged on a side of the elastic conductive sheet facing the first mounting plate; The first mounting plate and the circuit board cooperate to continuously squeeze the first sealing portion, and the first sealing portion is deformed under pressure to seamlessly fit the first mounting plate.

3. The foot switch device according to claim 2, characterized in that: The sealing structure further includes a second sealing portion; The second sealing portion is provided on a side of the elastic conductive sheet facing the circuit board; The first mounting plate and the circuit board cooperate to continuously press the second sealing portion, and the second sealing portion is deformed under pressure to seamlessly fit the circuit board.

4. The foot switch device according to claim 3, characterized in that: In the thickness direction of the elastic conductive sheet, the first sealing portion is disposed at a position directly opposite to the second sealing portion.

5. The foot switch device according to claim 3 or 4, characterized in that: The first mounting plate is provided with a first through hole; The first sealing portion and the second sealing portion are annular sealing ribs protruding from a surface portion of the elastic conductive sheet, and a diameter of the annular sealing rib is greater than a diameter of the first through hole.

6. The foot switch device according to claim 5, characterized in that: A plurality of positioning posts are arranged on the first mounting plate around the first through hole, the elastic conductive sheet has positioning holes corresponding to the positioning posts, and the positioning posts pass through the positioning holes and are fixedly connected to the circuit board.

7. The foot switch device according to claim 5, characterized in that: The elastic conductive sheet is an overall conductive silicone sheet; The elastic conductive sheet has a first recessed portion on one side facing the circuit board, the first recessed portion forming a deformation space of the elastic conductive sheet, and in a longitudinal section of the first recessed portion, an angle between an extension line of the wall of the first recessed portion and an extension line of the end face is 15° to 25°.

8. The foot switch device according to claim 7, characterized in that: The key unit comprises a key, a reset member and a push rod, wherein the push rod is coaxially connected to the key, the reset member is sleeved on the push rod, and two ends of the reset member respectively abut against the key and the first mounting plate; The push rod and the elastic conductive sheet are arranged opposite to the first through hole. When the key is subjected to force, the push rod passively passes through the first through hole, pushing the elastic conductive sheet to contact the circuit board to form a path, and retreats with the help of the reset member when the key loses force, and the elastic conductive sheet is separated from the circuit board to restore the circuit break; The elastic conductive sheet has a butt-joint portion on one side facing the push rod corresponding to the position of the first recessed portion; the butt-joint portion is coaxially arranged with the push rod, and the diameter of the butt-joint portion is greater than the end face diameter of the push rod.

9. The foot switch device according to claim 8, characterized in that: The elastic conductive sheet further has a second recessed portion on one side facing the top rod; The second recessed portion is arranged around the abutting top portion, and the recessed depth of the second recessed portion is smaller than that of the first recessed portion; The portion of the elastic conductive sheet between the first recessed portion and the second recessed portion has a thickness smaller than that of the abutting portion.

10. An oral medical device, characterized in that: A foot switch device comprising any one of claims 1 to 9.

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