Key structure capable of preventing water seepage during cleaning and dental medical equipment

Abstract

The utility model discloses a kind of key structure and dental medical equipment of preventing cleaning water seepage, including shell, with keyhole;Key switch is set in the center of shell and is set corresponding to the keyhole;Cap, including the first connecting part of cap brim towards one side extension, the outer side of the first connecting part and the hole wall of the keyhole are pasted;Ring, annular structure, located the opposite inner side of the keyhole, the first connecting part is extruded deformation seal by the interference fit between the ring and the keyhole.The utility model uses the interference fit of ring and keyhole to the first connecting part, makes the first connecting part extruded deformation, tightly fits the inner wall of keyhole, forms effective sealing barrier, prevents liquid from seeping, will not produce gap seepage when wiping and cleaning, effectively prevent liquid from seeping into equipment interior when cleaning, protect key switch and circuit component etc., simultaneously solve the problem that traditional key is easy to fall off when cleaning wiping.

Description

Technical Field

[0001] This utility model relates to the field of dental medical equipment technology, and in particular to a button structure and dental medical equipment that prevents water seepage during cleaning. Background Technology

[0002] In the dental field, electronically driven handheld devices are widely used in dental implantation, dental restoration, dental surgery (including tooth extraction), and root canal treatment. Because these devices come into direct contact with the patient's mouth, they must undergo rigorous disinfection after each use, with alcohol wiping being the most common method. However, the button structure of existing devices has significant water-proofing defects during disinfection, seriously affecting the device's lifespan and safety.

[0003] The sealing performance between the buttons and the outer shell of existing dental handheld devices is insufficient. When wiping with alcohol, liquid can easily seep into the device through the gap between the button and the button hole, causing damage to internal components such as buttons, switches, and circuits. Although some devices use soft rubber keycaps to improve sealing, soft rubber is prone to deformation under wiping force, which exacerbates the gaps and may even cause the keycaps to fall out of the button hole. This increases equipment maintenance costs and poses safety hazards for medical operations.

[0004] Meanwhile, existing button structures have significant shortcomings in terms of ease of operation. Dental surgery demands extremely high sensitivity and stability in button operation. Medical staff need to frequently start and stop the device or hold down buttons for extended periods to maintain its operation. Currently, most devices use a single integrated design for the button cap and pressure transmission structure. When a hard, soft rubber material is used, the button activation force is excessive, increasing the operational burden on medical staff and potentially affecting the precision of the procedure due to improper force application during delicate surgeries. Conversely, if a softer material is used, the pressure transmission structure cannot provide sufficient support, making it difficult to effectively trigger the button switch, requiring considerable force to complete the operation and severely disrupting the smoothness of the surgical process. Utility Model Content

[0005] The purpose of this invention is to provide a button structure and dental medical device that prevent water seepage during cleaning, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a button structure that prevents water seepage during cleaning, including:

[0008] The outer casing has button holes;

[0009] A push-button switch is located inside the housing and is positioned at the center of the button hole.

[0010] A keycap includes a first connecting portion extending to one side along the edge of the cap. The first connecting portion has an annular structure. The outer side of the first connecting portion is in contact with the wall of the key hole. The keycap is provided with a pressing conduction portion, which is located above the key switch.

[0011] The pressure ring, which is an annular structure, is located on the opposite inner side of the key hole. The first connecting part is sealed by the interference fit and extrusion deformation between the pressure ring and the key hole.

[0012] This technical solution utilizes the interference fit between the pressure ring and the key hole on the first connecting part, causing the first connecting part to be squeezed and deformed, tightly fitting the inner wall of the key hole, forming an effective sealing barrier to prevent liquid from seeping in. It will not cause leakage during wiping and cleaning, effectively preventing liquid from seeping into the equipment during cleaning, protecting components such as the key switch and circuit, and laying the foundation for subsequent optimization of operating performance.

[0013] As an extension of the above solution: the wall of the key hole protrudes towards the axis and is provided with an annular step, the first connecting part is provided with an annular groove corresponding to the annular step, the annular step and the annular groove are engaged and connected, so that the bottom edge of the keycap is mounted on the annular step.

[0014] The extended design uses an annular step and an annular groove to engage, allowing the bottom edge of the keycap to rest on the annular step. This enhances the stability of the connection between the keycap and the shell, preventing the keycap from loosening or shifting during operation and disinfection, and further improving the sealing performance.

[0015] As an extension of the above solution: a second connecting part is provided radially extending from the bottom of the first connecting part, and the top surface of the second connecting part abuts against the bottom surface of the annular step.

[0016] This extended design increases the contact area and connection strength between the keycap and the shell, improves the overall structural stability, reduces deformation and gaps caused by external forces, and further enhances the reliability of the seal by utilizing the engagement of the annular step and the annular groove, and the abutment of the second connecting part with the annular step. At the same time, it further enhances the anti-fall-off performance of the keycap.

[0017] As an extension of the above solution: the second connecting part is provided with at least two third connecting parts along the radial extension direction, and the third connecting parts are symmetrically distributed or arranged in a circular array around the axis of the key hole. The symmetrical or circular array arrangement of the third connecting parts around the axis of the key hole can evenly distribute external forces, further enhance the connection stability between the keycap and the shell, and prevent damage or loosening due to excessive local stress.

[0018] As an extension of the above solution: the bottom side of the second connecting part is located below the bottom end face of the pressure ring. This location of the bottom side of the second connecting part below the bottom end face of the pressure ring provides a certain degree of restraint, preventing downward displacement of the pressure ring during long-term use. The upper and lower ends of the outer side of the pressure ring are always positioned between the upper end of the first connecting part and the lower end of the second connecting part, ensuring a consistently stable interference fit sealing effect.

[0019] As an extension of the above solution: the press-conducting part includes a clamping member and a press-conducting member. The upper end of the clamping member is fixedly connected to the keycap, and the lower end is located above the button switch. The press-conducting member is fixedly assembled on the lower part of the clamping member, and the press-conducting member is aligned with the press trigger point of the button switch.

[0020] This extended solution uses a clamping component to drive a pressing and transmitting component downwards. Pressing the transmitting component triggers a button switch, starting the equipment. This allows for easy operation of the equipment while simultaneously preventing leakage, making it convenient for users to operate.

[0021] As an extension of the above solution: the keycap area between the clamping member and the first connecting part is an elastic deformation area. By setting the elastic deformation area, the keycap can generate appropriate elastic deformation when pressed, reducing the actuation force of the key and improving the convenience of operation, while also allowing it to quickly return to its original position after the press is released.

[0022] As an extension of the above solution, the keycaps are made of soft rubber or elastic deformable material. Soft rubber or elastic deformable material, on the one hand, facilitates a tight fit with the keyhole through deformation, enhancing sealing performance; on the other hand, its softness reduces resistance during pressing, improving the tactile feel.

[0023] As an extension of the above solution, the pressure transmission component is made of a rigid or hard material. The rigid or hard material ensures that the pressure applied is effectively transmitted to the button switch, avoiding force loss due to excessively soft material and ensuring that the button switch can be reliably triggered.

[0024] On the other hand, this utility model also provides a dental medical device, including a button structure as described above that prevents water seepage during cleaning.

[0025] The dental medical device provided by this utility model has good waterproof performance and is easy to operate. It can meet the needs of multiple fields such as dental implantation and restoration, extend the service life of the device, and improve the safety and efficiency of surgery. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0027] Figure 1 This is a schematic diagram of the button structure in the embodiment;

[0028] Figure 2 This is a schematic diagram of the keycap structure in the embodiment;

[0029] Figure 3 This is a cross-sectional schematic diagram of the button structure in an embodiment.

[0030] In the attached diagram: 100: outer casing; 110: button hole; 120: annular step; 200: button switch; 300: keycap; 310: first connecting part; 311: annular groove; 320: second connecting part; 330: third connecting part.

[0031] 340: Pressing transmission part; 341: Clamping part; 342: Pressing transmission part; 400: Pressure ring. Detailed Implementation

[0032] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] Reference Figures 1 to 3 The following are several embodiments of a key structure for preventing water seepage during cleaning and a dental medical device according to this utility model.

[0037] In some embodiments, such as Figures 1 to 3As shown, this utility model provides a button structure that prevents water seepage during cleaning, comprising:

[0038] The outer casing 100 has a button hole 110;

[0039] A push-button switch 200 is disposed inside the housing 100 and is positioned at the center of the push-button hole 110;

[0040] The keycap 300 includes a first connecting portion 310 extending to one side along the edge of the cap. The first connecting portion 310 has an annular structure. The outer side of the first connecting portion 310 is in contact with the wall of the key hole 110. The keycap 300 is provided with a pressing conduction portion 340, which is located above the key switch 200.

[0041] The pressure ring 400 is an annular structure located on the inner side of the key hole 110. The first connecting part 310 is sealed by the interference fit between the pressure ring 400 and the key hole 110 through extrusion deformation.

[0042] In this embodiment, the interference fit between the pressure ring and the key hole is controlled between 0.05-0.2mm. Too small an interference fit may prevent effective sealing; too large an interference fit will lead to assembly difficulties and may cause excessive deformation and damage to the first connecting part. The pressure ring can be directly pressed into the key hole using an interference fit. During assembly, the first connecting part of the keycap is placed into the key hole of the housing, and the pressure ring is installed on the opposite inner side of the key hole, creating an interference fit between the pressure ring and the key hole. This compresses and deforms the first connecting part, achieving a seal. When the keycap is pressed, the pressing transmission part of the keycap moves downwards, i.e., towards the key switch, triggering the key switch.

[0043] Compared to traditional button designs where cleaning can deform the soft rubber button caps, allowing liquid to seep into the device through the gaps between the button caps and the device casing, this embodiment utilizes an interference fit between a pressure ring and the button hole at the first connecting part. This causes the first connecting part to deform under pressure, tightly fitting against the inner wall of the button hole and forming an effective sealing barrier to prevent liquid seepage. It also eliminates the problem of soft rubber button caps detaching during cleaning, a common issue with traditional button designs. This embodiment effectively prevents liquid from seeping into the device during cleaning, protecting components such as the button switches and circuitry, and laying the foundation for subsequent optimization of operational performance.

[0044] In some embodiments, such as Figure 1 and Figure 3As shown, the wall of the key hole 110 protrudes towards the axis and is provided with an annular step 120. The first connecting part 310 is provided with an annular groove 311 corresponding to the annular step 120. The annular step 120 and the annular groove 311 are engaged and connected, so that the bottom edge of the keycap 300 is mounted on the annular step 120.

[0045] In this embodiment, the keycap's edge is mounted on the annular step by the engaging connection between the annular step and the annular groove. This enhances the stability of the connection between the keycap and the outer shell, prevents the keycap from loosening or shifting during operation and disinfection, and further improves the sealing performance.

[0046] In some embodiments, such as Figure 2 and Figure 3 As shown, a second connecting part 320 is provided radially extending from the bottom of the first connecting part 310, and the top surface of the second connecting part 320 abuts against the bottom surface of the annular step 120.

[0047] Compared to traditional button designs where the soft rubber keycaps can detach during cleaning, this embodiment features a second connecting part whose top surface abuts against the bottom surface of the annular step. This increases the contact area and connection strength between the keycap and the outer shell, improving the overall structural stability and reducing deformation and gaps caused by external forces. The engagement of the annular step with the annular groove and the abutment between the second connecting part and the annular step further enhance the reliability of the seal and improve the keycap's anti-detachment performance.

[0048] In some embodiments, such as Figure 1 and Figure 3 As shown, the second connecting portion 320 is provided with at least two third connecting portions 330 along the radial extension direction. The third connecting portions 330 are symmetrically distributed or arranged in a circular array around the axis of the key hole 110. The symmetrical or circular array arrangement of the third connecting portions around the axis of the key hole can evenly distribute external forces, further enhance the connection stability between the keycap and the shell, and prevent damage or loosening due to excessive local force.

[0049] In some embodiments, such as Figure 3 As shown, the bottom side of the second connecting part 320 is located below the bottom end face of the pressure ring 400. The bottom side of the second connecting part, located below the bottom end face of the pressure ring, can provide a certain degree of restraint on the pressure ring, preventing downward displacement during long-term use. The upper and lower ends of the outer side of the pressure ring are always positioned between the upper end of the first connecting part and the lower end of the second connecting part, ensuring a continuous and stable interference fit sealing effect.

[0050] In some embodiments, such as Figure 3As shown, the press transmission part 340 includes a clamping member 341 and a press transmission member 342. The upper end of the clamping member 341 is fixedly connected to the keycap 300, and the lower end is located above the button switch 200. The press transmission member 342 is fixedly assembled on the lower part of the clamping member 341, and the press transmission member 342 is aligned with the press trigger point of the button switch 200.

[0051] In this embodiment, the clamping component and the keycap can be fixedly connected by integral molding to ensure the strength and stability of the connection and reduce assembly steps. The separate design of the clamping component and the pressing transmission component allows the pressing transmission component to more accurately align with the pressing trigger point of the key switch, ensuring accurate triggering when pressed and improving the sensitivity and accuracy of key triggering.

[0052] Compared with traditional button solutions, traditional buttons have the drawbacks of requiring a large pressing force, which affects operation, and having a small pressing force, which makes it difficult to trigger the device to start. In this embodiment, the clamping component drives the pressing transmission component to move downward. Pressing the transmission component triggers the button switch, and the device starts. This achieves both waterproofing and easy device start-up, making it easy for users to operate.

[0053] In some embodiments, such as Figure 3 As shown, the keycap area between the clamping member 341 and the first connecting part 310 is an elastic deformation area. The thickness of the elastic deformation area is 0.3-2mm, and its elastic modulus varies depending on the soft rubber or elastic deformation material used, typically between 5-20MPa, to ensure that it can produce a deformation of 1-3mm when subjected to a pressing force of 5-20N, thus achieving normal key triggering and reset. The elastic deformation area of ​​the keycap deforms when pressed, and the force is transmitted to the pressing conductor through the clamping member. The pressing conductor can be made of a rigid material, which can accurately and forcefully trigger the key switch; after release, the elastic force of the elastic deformation area resets the keycap, and the key switch is disconnected.

[0054] This embodiment, by setting an elastic deformation area, enables the keycap to produce appropriate elastic deformation when pressed, reducing the starting force of the key and improving the convenience of operation, while allowing it to quickly return to its original position after the press is released.

[0055] In some embodiments, such as Figure 1 As shown, the keycap 300 is made of soft rubber or an elastically deformable material. The soft rubber or elastically deformable material can be silicone rubber, EPDM rubber, thermoplastic elastomers, etc., which on the one hand facilitates a tight fit with the keyhole through deformation, enhancing sealing performance; on the other hand, the softness reduces resistance during pressing, improving the tactile feel.

[0056] In some embodiments, such as Figure 3As shown, the pressure transmission element 342 is made of a hard or rigid material. Hard or rigid materials can be selected from hard plastics, metals, glass, wood, etc., ensuring that the pressing force can be effectively transmitted to the button switch, avoiding force loss due to excessively soft materials, and ensuring that the button switch can be reliably triggered.

[0057] On the other hand, the present invention also provides a dental medical device, including a button structure that prevents water seepage during cleaning, as described in one or more of the above combined embodiments.

[0058] The dental medical device provided by this utility model possesses excellent waterproof performance and ease of operation, meeting the needs of multiple fields such as dental implantation and restoration, extending the service life of the device, and improving the safety and efficiency of surgery. Regarding sealing and waterproofing, the interference fit and deformation of the first connecting part of the keycap by the pressure ring and the key hole forms a reliable seal, effectively preventing liquid from seeping into the device during cleaning and protecting components such as the key switch and circuitry. The engagement of the annular step and the annular groove, and the abutment between the second connecting part and the annular step, further enhance the stability of the seal, preventing gaps from forming due to disinfection or operation. In terms of structural stability, the engagement of the annular step and the annular groove makes the keycap mounting more stable, the second connecting part increases the contact area and connection strength, the symmetrical or circumferential array distribution of the third connecting part evenly disperses external forces, and the limiting effect of the second connecting part on the pressure ring ensures the continuity of the interference fit seal effect. Overall, this improves the stability of the structure during long-term use and frequent operation, reducing loosening, displacement, or damage. In terms of operational performance, the separate design of the clamping component and the pressing transmission component improves the sensitivity and accuracy of button triggering and facilitates the replacement of the pressing transmission component; the elastic deformation area reduces the starting force, the soft rubber or elastic deformation material keycap reduces pressing resistance, and the rigid pressing transmission component ensures effective transmission of pressing force, making operation more convenient and effortless, and improving the operation precision and smoothness in dental surgery.

[0059] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A button structure that prevents water seepage during cleaning, characterized in that, include: The outer casing has button holes; A push-button switch is located inside the housing and is positioned at the center of the button hole. A keycap includes a first connecting portion extending to one side along the edge of the cap. The first connecting portion has an annular structure. The outer side of the first connecting portion is in contact with the wall of the key hole. The keycap is provided with a pressing conduction portion, which is located above the key switch. The pressure ring, which is an annular structure, is located on the opposite inner side of the key hole. The first connecting part is sealed by the interference fit and extrusion deformation between the pressure ring and the key hole.

2. The button structure for preventing water seepage during cleaning according to claim 1, characterized in that: The wall of the key hole protrudes towards the axis and has an annular step. The first connecting part has an annular groove corresponding to the annular step. The annular step and the annular groove are engaged and connected, so that the bottom edge of the keycap rests on the annular step.

3. The button structure for preventing water seepage during cleaning according to claim 2, characterized in that: A second connecting part is provided radially extending from the bottom of the first connecting part, and the top surface of the second connecting part abuts against the bottom surface of the annular step.

4. The button structure for preventing water seepage during cleaning according to claim 3, characterized in that: The second connecting portion is provided with at least two third connecting portions along the radial extension direction, and the third connecting portions are symmetrically distributed around the axis of the key hole or distributed in a circular array.

5. The button structure for preventing water seepage during cleaning according to claim 3, characterized in that: The bottom side of the second connecting part is located below the bottom end face of the pressure ring.

6. The button structure for preventing water seepage during cleaning according to claim 1, characterized in that: The press-conducting part includes a clamping member and a press-conducting member. The upper end of the clamping member is fixedly connected to the keycap, and the lower end is located above the button switch. The press-conducting member is fixedly assembled on the lower part of the clamping member, and the press-conducting member is aligned with the press trigger point of the button switch.

7. The button structure for preventing water seepage during cleaning according to claim 6, characterized in that: The keycap area between the clamping member and the first connecting part is an elastic deformation area.

8. The button structure for preventing water seepage during cleaning according to claim 6, characterized in that: The keycaps are made of soft rubber or elastic deformation material.

9. A button structure for preventing water seepage during cleaning according to claim 6, characterized in that: The pressing and transmitting element is made of a rigid material or a hard material.

10. A dental medical device, characterized in that: Includes a key structure that prevents water seepage during cleaning, as described in any one of claims 1-9.

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