Lens waterproof structure of stainless steel composite electric toothbrush
The waterproof structure for stainless steel composite electric toothbrushes addresses poor sealing by using a plastic inner shell with sealing grooves and an elastomer film, creating a double seal to prevent water ingress and ensure IPX8 compliance.
Patent Information
- Application Number
- CN202420521674.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-18
AI Technical Summary
Stainless steel composite electric toothbrushes face issues with poor waterproofness and sealing at the lens of the window control, leading to potential short circuits and motor burnout due to water seepage.
A waterproof structure featuring a plastic inner shell with sunken annular sealing grooves, an annular sealing ring, and a thermoplastic elastomer elastic film with protrusions and grooves, combined with a snap-fitted window inner shell, forms a double waterproof seal between the stainless steel composite shell and internal components.
Achieves IPX8 standard waterproofing, ensuring the electric toothbrush's internal structure is protected from water ingress, preventing short circuits and extending the motor's lifespan.
Smart Images
Figure CN222148013U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric toothbrushes, in particular to a lens waterproof structure of a stainless steel composite electric toothbrush. Background Art
[0002] As people's living standards improve, they pay more and more attention to oral health. As an advanced oral cleaning tool, electric toothbrushes are favored by more and more consumers.
[0003] At present, the shells of electric toothbrushes on the market are usually made of plastic by injection molding. However, the injection molding process of traditional toothbrushes has residual mold lines, which affects the appearance of the electric toothbrushes. Especially in the fierce market competition environment, electric toothbrushes with differentiated, cost-effective and fashionable stainless steel composite shells are leading the market. The surface of the stainless steel metal body is smooth and delicate after processing, and the surface has a variety of colorful PVD and brushed electroplating processes. The appearance shows the inspiration of the future of science and technology, which greatly meets the needs of customers.
[0004] However, due to the difference in materials between the stainless steel composite shell and the internal structure of the electric toothbrush, the stainless steel composite shell and the internal structure have the disadvantages of poor waterproofness and poor sealing effect after assembly, especially the lens of the window control of the electric toothbrush, which connects the shell and the internal structure of the electric toothbrush and has poor waterproofness. After using the stainless steel composite shell, the electric toothbrush has the problem of metal shell leakage and short circuit due to water droplets seeping from the lens of the window control, causing the internal structure of the electric toothbrush to burn out, thereby affecting the service life of the stainless steel composite electric toothbrush. Utility Model Content
[0005] The utility model aims to provide a waterproof structure for the lens of a stainless steel composite electric toothbrush, aiming to solve the problem that the lens of the window control of the electric toothbrush is not waterproof after the shell of the existing electric toothbrush is replaced from ordinary plastic material to stainless steel composite material, thereby preventing the internal structure of the electric toothbrush from being short-circuited through the stainless steel shell due to water seepage and causing the motor to burn out.
[0006] In view of this, the technical solution provided by the utility model is as follows: a waterproof structure for a lens of a stainless steel composite electric toothbrush, comprising an internal structure and a stainless steel composite outer shell sleeved on the outside of the internal structure, the internal structure comprising a plastic inner shell, a pair of sunken annular sealing grooves are provided on the surface of the plastic inner shell, an annular sealing ring is sleeved on the outside of the pair of sealing grooves, and the sealing ring is interference-fitted with the stainless steel composite outer shell, a second window hole is provided on the surface of the plastic inner shell between the pair of sealing grooves, and a first window hole corresponding to the second window hole is provided on the surface of the stainless steel composite outer shell, A window control is connected between the first window hole and the second window hole, and the window control includes a lens and a switch button. The plastic inner shell is clamped with a window inner shell above the second window hole, and the window inner shell is provided with a lens sinking groove, and the lens is positioned and installed through the lens sinking groove. After installation, the lens is sleeved in the first window hole, and the outer surface of the lens is smoothly connected to the outer surface of the stainless steel composite shell. The window inner shell is also provided with a button hole, and an elastic film for fixing the switch button is connected to the button hole, and the elastic film forms a waterproof seal for the button hole.
[0007] Furthermore, the window inner shell is made of transparent PC. Thus, the display screen on the internal structure can display the electric toothbrush usage instructions to the user through the window inner shell and the lens.
[0008] Furthermore, the elastic film has a sealing skirt for being clamped on the upper surface of the button hole, and the elastic film forms a sealed connection between the window inner shell and the switch button through the sealing skirt.
[0009] Furthermore, a plurality of first protrusions are provided on the side wall of the button hole, a plurality of first grooves are formed between the plurality of first protrusions, a plurality of second grooves corresponding to the first protrusions are protruded from the bottom of the elastic film, and a plurality of second protrusions are formed between the plurality of second grooves, and a double waterproof seal is formed between the elastic film and the button hole by the interference fit between the first protrusions and the second grooves and the interference fit between the second protrusions and the first grooves.
[0010] Furthermore, the elastic film is thermoplastic elastomer TPE. The elastic film connects the switch button and the circuit between the internal structure with its high elasticity, realizes the elastic pressing control of the switch button on the circuit of the internal structure, and can also achieve the purpose of waterproof sealing.
[0011] The utility model provides an interference fit sealing ring on the upper and lower sides of the window control, so that the window control, especially the lens and the switch button, forms a sealed connection between the stainless steel composite shell and the plastic inner shell. The window inner shell is used, and the window inner shell and the plastic inner shell are snap-fitted and assembled between the stainless steel composite shell to form a second waterproof sealing connection. The button hole is ensured by the concave-convex interference fit between the sealing skirt and the convex and concave of the elastic film between the convex and concave of the sealing skirt and the convex and concave of the convex, and the double waterproof sealing of the button hole is ensured. The utility model can achieve the waterproof sealing effect of the shell protection IPX8 of the IEC60529 standard by the above-mentioned scheme for the inner and outer double waterproof sealing of the lens. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of a stainless steel electric toothbrush.
[0013] Figure 2 This is a schematic diagram of the three-dimensional exploded structure of a stainless steel electric toothbrush.
[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the window inner shell.
[0015] Figure 4 This is one of the schematic diagrams of the three-dimensional structure of the elastic film.
[0016] Figure 5 This is the second schematic diagram of the three-dimensional structure of the elastic film.
[0017] Among them: 1-stainless steel composite shell, 11-first window hole, 2-internal structure, 21-plastic inner shell, 22-second window hole, 23-sealing groove, 3-window control, 31-lens, 32-switch button, 4-bottom shell, 5-sealing ring, 6-window inner shell, 61-lens sink groove, 62-button hole, 621-first groove, 622-first protrusion, 7-elastic film, 71-sealing skirt, 72-second protrusion, 73-second groove. DETAILED DESCRIPTION
[0018] The following is a brief description of the implementation of the present utility model in conjunction with the accompanying drawings.
[0019] A waterproof structure for the lens of a stainless steel composite electric toothbrush, referring to 1- Figure 2, including an internal structure 2 and a stainless steel composite shell 1 sleeved on the outside of the internal structure 2, a bottom shell 4 is provided at the ends of the internal structure 2 and the stainless steel composite shell 1 to assemble the internal structure 2 and the stainless steel composite shell 1 into an integrated structure, the internal structure 1 includes a plastic inner shell 21 and an internal electric drive and circuit structure part, a pair of sunken annular sealing grooves 23 are provided on the surface of the plastic inner shell 21, an annular sealing ring 5 is sleeved on the outside of the pair of sealing grooves 23, the annular sealing ring 5 is further positioned and installed through the sunken sealing grooves 23 to prevent the sealing ring 5 from sliding during the installation and assembly process, an interference fit is formed between the sealing ring 5 sleeved on the plastic inner shell 21 and the stainless steel composite shell 1, ensuring the sealing connection effect between the plastic inner shell 21 and the stainless steel composite shell 1 between the two sealing grooves 23, forming a sealed connection, wherein a second window hole 22 is provided on the surface of the plastic inner shell 21 between the pair of sealing grooves 23, a first window hole 11 corresponding to the second window hole 22 is provided on the surface of the stainless steel composite shell 1, and a sealing connection is formed between the two sealing grooves 23. A window control 3 is connected between the second window hole 22, and the window control 3 includes a lens 31 and a switch button 32. The switch button 32 passes through the surface of the lens 31 through the hole of the lens 31. The plastic inner shell 21 is clamped with a window inner shell 6 above the second window hole 22. The window inner shell 6 is provided with a lens sinking groove 61. The lens 31 is positioned and installed through the lens sinking groove 61. After installation, the lens 31 is sleeved in the first window hole 11, and the outer surface of the lens 31 is smoothly connected to the outer surface of the stainless steel composite shell 1. In order to ensure Visual effect: the window inner shell 6 is transparent PC, and the display screen on the internal structure 2 can display the electric toothbrush usage instructions to the user through the window inner shell 6 and the lens 31. The lens 31 is a convex lens with a magnifying effect, so that the image and text generated by the display screen on the internal structure 2 can be observed through the lens 31 to obtain a magnified visual effect. The window inner shell 6 is provided with a button hole 62, and the button hole 62 is connected to an elastic film 7 for fixing the switch button 32, and the elastic film 7 forms a waterproof seal for the button hole 62.
[0020] Since the button hole 62 needs to have a component contacting the circuit control of the internal structure 2, the elastic film 7 needs to be a material with good elasticity and wear resistance. Therefore, in this embodiment, the elastic film 7 uses a thermoplastic elastomer TPE, which uses its high elasticity to elastically connect the circuit between the switch button 32 and the internal structure 2, thereby realizing the elastic pressing control of the switch button 32 on the circuit of the internal structure 2 and ensuring the sealing performance of the switch button 32.
[0021] Reference Figure 3 , Figure 4 , Figure 5The elastic film 7 has a sealing skirt 71 for being clamped on the upper surface of the button hole 62. The elastic film 7 is tightly fitted on the upper surface of the button hole 62 through the sealing skirt 71, so that a sealed connection is formed between the window inner shell 6 and the internal structure 2, thereby ensuring the waterproof performance of the button hole 62. Of course, since the switch button 32 is a movable component, the elastic film 7 will inevitably vibrate slightly during the elastic pressing process. The above-mentioned slight vibration will cause a phased change in the fitting of the sealing skirt 71, affecting the sealing effect of the sealing skirt 71 at the moment when the switch button 32 is pressed. Therefore, in this embodiment, in order to prevent the above-mentioned problem from occurring, a plurality of first protrusions 622 are provided on the side wall of the button hole 62. A plurality of first grooves 621 are formed between the plurality of first protrusions 622, a plurality of second grooves 73 corresponding to the first protrusions 622 are protruded from the bottom of the elastic film 7, and a plurality of second protrusions 72 are formed between the plurality of second grooves 73. A double waterproof seal is formed between the elastic film 7 and the button hole 62 through the interference fit between the first protrusion 622 and the second groove 73 and the interference fit between the second protrusion 72 and the first groove 621. Therefore, at the moment when the switch button 32 is pressed, the button hole 62 avoids the sealing effect after the staged change caused by the adhesion of the sealing skirt 71 due to the concave-convex interference fit between the first protrusion 622 and the second groove 73 and the second protrusion 72 and the first groove 621 through the elastic film 7.
[0022] The utility model provides an interference fit sealing ring 5 on the upper and lower sides of the window control 3, so that the window control 3, especially the lens 31 and the switch button 32, forms a sealed connection between the stainless steel composite shell 1 and the plastic inner shell 21; the window inner shell 6 is used, and the window inner shell 6 and the plastic inner shell 21 are snap-fitted and pressed and assembled between the stainless steel composite shell 1 to form a second waterproof sealing connection, and the button hole 62 is ensured by the concave-convex interference fit between the elastic film 7 and the sealing skirt 71 and the protrusion and the groove, and the double waterproof sealing of the button hole 62 is ensured. The plastic inner shell 21 adopts a three-color injection molding process, so that the circuit drive and circuit structure parts of the internal structure 2 are completely wrapped in the plastic inner shell 21, and the internal IPX8 waterproof grade requirement can be achieved. At the same time, through the internal and external double waterproof sealing of the lens 31 of the window control 3, the waterproof sealing effect of the shell protection IPX8 of the IEC60529 standard can be achieved between the stainless steel composite shell 1 and the internal structure 2, thereby achieving the overall waterproof effect of the stainless steel composite electric toothbrush.
[0023] The above embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A waterproof structure for a lens of a stainless steel composite electric toothbrush, comprising an internal structure and a stainless steel composite shell sleeved outside the internal structure, characterized in that: The internal structure comprises a plastic inner shell, a pair of sunken annular sealing grooves are provided on the surface of the plastic inner shell, an annular sealing ring is sleeved on the outside of the pair of sealing grooves, and the sealing ring is interference-fitted with the stainless steel composite outer shell, a second window hole is provided on the surface of the plastic inner shell between the pair of sealing grooves, a first window hole corresponding to the second window hole is provided on the surface of the stainless steel composite outer shell, a window control is connected between the first window hole and the second window hole, the window control comprises a lens and a switch button, the plastic inner shell is clamped with a window inner shell above the second window hole, the window inner shell is provided with a lens sinking groove, the lens is positioned and installed through the lens sinking groove, after installation, the lens is sleeved in the first window hole, the outer surface of the lens is smoothly connected to the outer surface of the stainless steel composite outer shell, the window inner shell is also provided with a button hole, an elastic film for fixing the switch button is connected to the button hole, and the elastic film forms a waterproof seal for the button hole.
2. The lens waterproof structure of a stainless steel composite electric toothbrush according to claim 1, characterized in that: The inner shell of the window is transparent PC.
3. The lens waterproof structure of a stainless steel composite electric toothbrush according to claim 1, characterized in that: The elastic film has a sealing skirt for clamping on the upper surface of the button hole. The elastic film forms a sealed connection between the window inner shell and the switch button through the sealing skirt.
4. The waterproof structure of the lens of a stainless steel composite electric toothbrush according to claim 1, characterized in that: A plurality of first protrusions are provided on the side wall of the button hole, a plurality of first grooves are formed between the plurality of first protrusions, a plurality of second grooves corresponding to the first protrusions are protruded from the bottom of the elastic film, a plurality of second protrusions are formed between the plurality of second grooves, and a double waterproof seal is formed between the elastic film and the button hole by the interference fit between the first protrusions and the second grooves and the interference fit between the second protrusions and the first grooves.
5. The lens waterproof structure of a stainless steel composite electric toothbrush according to claim 1, characterized in that: The elastic film is thermoplastic elastomer TPE.