Machine body and electric toothbrush

Abstract

The utility model relates to the technical field of electric toothbrushes, and provides a machine body and an electric toothbrush. Comprising a shell, an accommodating cavity, a sheet body, a flexible pressing part and an accommodating space, wherein the accommodating cavity is positioned in the shell and is used for accommodating a motor; the sheet body is provided with a mounting hole; the pressing part is filled and fixed in the mounting hole; the window is formed in the side wall of the accommodating cavity and is communicated with the accommodating cavity; the sheet body covers and seals the window; and the accommodating space is positioned on a deformation path when the pressing part is pressed down.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric toothbrushes, and more specifically, it relates to a body and an electric toothbrush. Background Technology

[0002] Electric toothbrushes have become a common tool in modern life. Please refer to the Chinese Invention Patent; Title: A Shockproof and Silent Body; Publication No.: CN105455913A; Publication Date: 2016-04-06. Electric toothbrushes typically have an electric motor (i.e., a motor), which usually has an output shaft. The brush bristles are mounted on the output shaft, and the movement of the motor output shaft drives the brush bristles. The motor's start and stop are usually controlled by a motor control button. Existing motor control buttons, as in CN105455913A, are located inside mounting holes on the housing. External moisture can easily enter the housing through these mounting holes, severely affecting the electric toothbrush's lifespan.

[0003] The motor can also be found in the following document: Chinese Utility Model Patent; Title: A Bidirectional Action Sonic Motor and Body; Announcement No.: CN219678300U; Publication Date: 2023-09-12. Utility Model Content

[0004] The purpose of this utility model is to provide a body and an electric toothbrush to solve the technical problem in the prior art where external moisture can easily enter the housing through the mounting hole of the control button.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a body is provided, comprising: a housing, a cavity located within the housing for placing a motor, a sheet having a mounting hole, a flexible push button fixed within the mounting hole, a accommodating space disposed within the cavity for placing a motor control button, and a window formed on the side wall of the cavity and communicating with the cavity; the sheet covers and seals the window; the accommodating space is located on the deformation path of the push button when pressed.

[0006] Furthermore, the inner wall of the mounting hole has a first step, and the edge of the flexible pressing part has a second step that engages with the first step.

[0007] Furthermore, the sheet is a single piece made of a bendable material; an annular positioning groove extending along the edge of the window is provided on the inner wall of the window; the edge of the sheet is bent and can be inserted into the annular positioning groove; the sheet is bonded and fixed to the side wall of the annular positioning groove.

[0008] Furthermore, there is a first gap between the sheet body and the bottom of the annular positioning groove, and a second gap between the sheet body and the edge of the annular positioning groove; the first gap is larger than the second gap.

[0009] Furthermore, the edge of the sheet is bonded and fixed to the edge of the window using sealant.

[0010] Furthermore, the sealant is: waterproof foam adhesive.

[0011] Furthermore, the button is a one-piece component made of thermoplastic polyurethane.

[0012] Furthermore, the sheet is a transparent sheet.

[0013] Furthermore, the sheet body is a polycarbonate sheet.

[0014] Furthermore, it also includes: a bracket disposed within the accommodating cavity, a motor disposed on the bracket and having an output shaft, an output hole formed on the side wall of the accommodating cavity for the output shaft of the motor to pass through, and a motor control button disposed on the bracket and electrically connected to the motor; the motor control button is located within the accommodating space; the output shaft passes through the output hole to the outside of the accommodating cavity.

[0015] Furthermore, the housing is an integral piece formed by extruding an aluminum alloy block; and the housing has a tapered portion formed by spinning; the output hole is opened on the tapered portion.

[0016] Furthermore, the accommodating cavity is: a channel formed on the housing and extending in a straight line; the inner wall of the channel has a first groove extending along the channel and a second groove extending along the channel; the bracket can enter the channel through the first end of the channel, and the second end of the channel communicates with the output hole; one end of the bracket is slidably disposed in the first groove, and the other end of the bracket is slidably disposed in the second groove.

[0017] Furthermore, it also includes: a sealing element; the gap between the bracket and the inner wall of the channel is sealed by the sealing element.

[0018] Furthermore, the seal has a first sealing ring portion; the inner wall of the second end of the channel has a first annular flange; the bracket has a second annular flange; and the first sealing ring portion is clamped and sealed between the first annular flange and the second annular flange in the extending direction of the channel.

[0019] Furthermore, there are multiple first annular flanges, multiple second annular flanges, and multiple first sealing ring portions; the multiple first annular flanges, the multiple first sealing ring portions, and the multiple second annular flanges correspond one-to-one.

[0020] Furthermore, the sealing element has a second sealing ring portion; the bracket is fitted with the second sealing ring portion; in the radial direction of the channel, the second sealing ring portion seals the gap between the bracket and the inner wall of the channel; in the extending direction of the channel, at least one first sealing ring portion is respectively provided on both sides of the second sealing ring portion.

[0021] Furthermore, the inner wall of the first annular flange that contacts the first sealing ring is an annular planar surface machined by a T-shaped tool of a CNC machine tool extending into the channel;

[0022] And / or the inner wall of the channel that contacts the second sealing ring is a cylindrical surface machined by a T-shaped tool of a CNC machine tool extending into the channel.

[0023] Furthermore, a first positioning groove is provided on the inner wall of the channel, and a first hook is provided on the bracket that is engaged in the first positioning groove.

[0024] Furthermore, it also includes: a cap that seals the first end of the channel; a second positioning groove that is machined by a T-shaped cutter of a CNC machine tool is provided on the inner wall of the channel; and a second hook that is engaged in the second positioning groove is provided on the cap.

[0025] This utility model also provides an electric toothbrush, including: the body and a brush located outside the housing; the brush is disposed on the output shaft.

[0026] The beneficial effects of the body provided by this utility model are as follows: Compared with the prior art, the body provided by this utility model has a housing cavity with a housing space inside, and the motor can be installed in the housing cavity; the motor control button for controlling the motor can be installed in the housing space; the sheet has a mounting hole, and a flexible push part is filled and fixed in the mounting hole, so that water cannot penetrate into the housing cavity from between the push part and the mounting hole; when the user presses the push part, the push part can deform; a window is opened on the side wall of the housing cavity, and the sheet covers and seals the window, so that the sheet can prevent water from entering the housing cavity through the window; when the user presses the push part, the push part deforms, and the push part can contact the motor control button in the housing space during the deformation process, so that the motor control button can be pressed when the push part contacts the motor control button. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A three-dimensional schematic diagram of an electric toothbrush provided in an embodiment of this utility model. Figure 1 ;

[0029] Figure 2 A three-dimensional schematic diagram of an electric toothbrush provided in an embodiment of this utility model. Figure 2 ;

[0030] Figure 3 A schematic diagram of the right side of an electric toothbrush provided in an embodiment of this utility model;

[0031] Figure 4 A top view schematic diagram of an electric toothbrush provided in an embodiment of this utility model;

[0032] Figure 5 A bottom view of the electric toothbrush provided in an embodiment of this utility model;

[0033] Figure 6 This is a front view schematic diagram of an electric toothbrush provided in an embodiment of the present utility model;

[0034] Figure 7 for Figure 6 Sectional view of AA;

[0035] Figure 8 for Figure 7 Enlarged view at point C (output axis is hidden);

[0036] Figure 9 for Figure 6 BB section view;

[0037] Figure 10 for Figure 9 Enlarged view at point D;

[0038] Figure 11 A flowchart illustrating the machining process of the machine body provided in this embodiment of the utility model.

[0039] The following are the labeling elements in the figure:

[0040] 1-Housing shell; 11-Accommodating cavity; 111-Output hole; 112-Accommodating space; 113-Window; 1131-Annular positioning groove; 114-Conical part; 1151-First sliding groove; 1152-Second sliding groove; 116-First annular flange; 1171-First positioning groove; 1172-Second positioning groove; 21-Plate; 211-Mounting hole; 22-Push-off part; 23-Sealant; 31-Motor; 311-Output shaft; 32-Bracket; 321-Second annular flange; 322-First hook; 33-Cap; 331-Second hook; 34-Battery; 35-Motor control button; 4-Sealing element; 41-First sealing ring part; 42-Second sealing ring part; 43-Silicone ring. Detailed Implementation

[0041] It should be noted that the specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0042] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Here, A and B can be singular or plural, respectively.

[0043] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" or "attached to" another component, it can be directly connected to or indirectly connected to that other component. When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component.

[0044] It should be noted that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation 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.

[0045] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0046] It should be noted that the term "multiple" means two or more, unless otherwise explicitly specified.

[0047] Please refer to the following: Figures 1 to 10 The body provided by this utility model will now be described. The body includes: a housing 1, a receiving cavity 11 located inside the housing 1 for housing a motor 31, a sheet 21 having a mounting hole 211, a flexible push part 22 filled and fixed inside the mounting hole 211, a receiving space 112 disposed inside the receiving cavity 11 for housing a motor control button 35, and a window 113 opened on the side wall of the receiving cavity 11 and communicating with the receiving cavity 11; the sheet 21 covers and seals the window 113; the receiving space 112 is located on the deformation path of the push part 22 when it is pressed.

[0048] Thus, the housing 1 has a receiving cavity 11, and the receiving cavity 11 has a receiving space 112, within which the motor 31 can be disposed; the motor control button 35 for controlling the motor 31 can be disposed within the receiving space 112; the plate 21 has a mounting hole 211, and a flexible push part 22 is filled and fixed within the mounting hole 211, preventing moisture from seeping into the receiving cavity 11 from between the push part 22 and the mounting hole 211; when the user presses the push part 22, the push part... 22 can deform; a window 113 is provided on the side wall of the accommodating cavity 11, and the sheet 21 covers and seals the window 113. The sheet 21 can prevent moisture from entering the accommodating cavity 11 through the window 113; when the user presses the pressing part 22, the pressing part 22 deforms, and the pressing part 22 can contact the motor control button 35 in the accommodating space 112 during the deformation process. When the pressing part 22 contacts the motor control button 35, the motor control button 35 can be pressed.

[0049] In one embodiment, the sheet 21 and the push part 22 are integrally formed by injection molding.

[0050] In one embodiment, the outer edge of the push part 22 has an annular groove, and the inner edge of the mounting hole 211 is fixed in the annular groove.

[0051] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, the inner wall of the mounting hole 211 has a first step, and the edge of the flexible push part 22 has a second step that engages with the first step. In this way, the engagement of the first step and the second step makes the flexible push part 22 less likely to loosen.

[0052] Further, please refer to Figures 1 to 10As a specific embodiment of the body provided by this utility model, the sheet 21 is an integral piece made of a bendable material; an annular positioning groove 1131 extending along the edge of the window 113 is provided on the inner wall of the window 113; the edge of the sheet 21 is bent and can be inserted into the annular positioning groove 1131; the sheet 21 is bonded and fixed to the side wall of the annular positioning groove 1131. In this way, after the edge of the sheet 21 is bent and inserted into the annular positioning groove 1131, the sheet 21 is not easy to detach from the annular positioning groove 1131. The installation can be completed by inserting the sheet 21 into the annular positioning groove 1131, and the sheet 21 is more firmly bonded to the side wall of the annular positioning groove 1131.

[0053] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, there is a first gap between the sheet 21 and the bottom of the annular positioning groove 1131, and a second gap between the sheet 21 and the edge of the annular positioning groove 1131; the first gap is larger than the second gap. Thus, the larger first gap facilitates the assembly of the sheet 21 into the annular positioning groove 1131, and the smaller first gap can reduce the entry of external contaminants into the accommodating cavity 11.

[0054] Further, please refer to Figures 1 to 10 In one specific embodiment of the body provided by this utility model, the edge of the sheet 21 is bonded and fixed to the edge of the window 113 by sealant 23. Thus, installing the sheet 21 is very convenient; it only requires bonding the sheet 21 to the edge of the window 113.

[0055] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, the sealant 23 is: waterproof foam adhesive.

[0056] Further, please refer to Figures 1 to 10 In one specific embodiment of the body provided by this utility model, the button is a one-piece component made of thermoplastic polyurethane. Thus, thermoplastic polyurethane has good elasticity.

[0057] Further, please refer to Figures 1 to 10 In one specific embodiment of the body provided by this utility model, the sheet 21 is a transparent sheet. This allows the user to easily observe the inside of the accommodating cavity 11 through the sheet 21.

[0058] In one embodiment, a display screen electrically connected to the motor 31 is provided inside the accommodating cavity 11, and the user can observe the display screen inside the accommodating cavity 11 through the sheet 21.

[0059] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, the sheet 21 is a polycarbonate sheet.

[0060] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, it also includes: a bracket 32 ​​disposed in the accommodating cavity 11, a motor 31 disposed on the bracket 32 ​​and having an output shaft 311, an output hole 111 opened on the side wall of the accommodating cavity 11 for the output shaft 311 of the motor 31 to pass through, and a motor control button 35 disposed on the bracket 32 ​​and electrically connected to the motor 31; the motor control button 35 is located in the accommodating space 112; the output shaft 311 passes through the output hole 111 to the outside of the accommodating cavity 11. Thus, the housing 1 has a receiving cavity 11, and the receiving cavity 11 has a receiving space 112; the motor control button 35 for controlling the motor 31 can be set in the receiving space 112; the motor 31 can be set in the receiving cavity 11, and an output hole 111 is opened on the side wall of the receiving cavity 11, through which the motor output shaft 311 of the motor 31 can pass to the external space; the plate 21 has a mounting hole 211, and a flexible push part 22 is filled and fixed in the mounting hole 211, so that water cannot escape from between the push part 22 and the mounting hole 211. The moisture penetrates into the accommodating cavity 11; when the user presses the pressing part 22, the pressing part 22 can deform; a window 113 is provided on the side wall of the accommodating cavity 11, and the sheet 21 covers and seals the window 113, so that the sheet 21 can prevent moisture from entering the accommodating cavity 11 through the window 113; when the user presses the pressing part 22, the pressing part 22 deforms, and the pressing part 22 can contact the motor control button 35 in the accommodating space 112 during the deformation process, so that the motor control button 35 can be pressed when the pressing part 22 contacts the motor control button 35.

[0061] In one embodiment, battery 34 supplies power to motor 31. In another embodiment, battery 34 is disposed within accommodating cavity 11.

[0062] Further, please refer to Figures 1 to 10 As a specific embodiment of the machine body provided by this utility model, the housing 1 is an integral part formed by extruding an aluminum alloy block; and the housing 1 has a conical part 114 formed by spinning; the output hole 111 is opened on the conical part 114. In this way, the housing 1 is formed by extrusion, which is very fast and convenient; the conical part 114 is formed by spinning, which improves the processing speed.

[0063] Further, please refer to Figures 1 to 10As a specific embodiment of the housing provided by this utility model, the accommodating cavity 11 is: a channel formed on the housing 1 and extending in a straight line; the inner wall of the channel has a first sliding groove 1151 extending along the channel and a second sliding groove 1152 extending along the channel; the bracket 32 ​​can enter the channel through the first end of the channel, and the second end of the channel is connected to the output hole 111; one end of the bracket 32 ​​is slidably disposed in the first sliding groove 1151, and the other end of the bracket 32 ​​is slidably disposed in the second sliding groove 1152. In this way, the bracket 32 ​​can slide along the channel through the first sliding groove 1151 and the second sliding groove 1152.

[0064] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, it also includes: a sealing element 4; the gap between the bracket 32 ​​and the inner wall of the channel is sealed by the sealing element 4. In this way, the sealing element 4 can seal the gap between the bracket 32 ​​and the inner wall of the channel.

[0065] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, the sealing member 4 has a first sealing ring portion 41; a first annular flange 116 is provided on the inner wall of the second end of the channel; a second annular flange 321 is provided on the bracket 32; the first sealing ring portion 41 is sandwiched and sealed between the first annular flange 116 and the second annular flange 321 in the extending direction of the channel. In this way, the first sealing ring portion 41 can seal the gap between the channel and the bracket 32 ​​in the axial direction of the channel.

[0066] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, there are multiple first annular flanges 116, multiple second annular flanges 321, and multiple first sealing ring portions 41; the multiple first annular flanges 116, the multiple first sealing ring portions 41, and the multiple second annular flanges 321 correspond one-to-one. In this way, the multiple first sealing ring portions 41 can sequentially seal the channel in the axial direction.

[0067] Further, please refer to Figures 1 to 10 As a specific embodiment of the body provided by this utility model, the sealing member 4 has a second sealing ring portion 42; the second sealing ring portion 42 is sleeved on the bracket 32; in the radial direction of the channel, the second sealing ring portion 42 seals the gap between the bracket 32 ​​and the inner wall of the channel; in the extension direction of the channel, at least one first sealing ring portion 41 is provided on both sides of the second sealing ring portion 42. Thus, the second sealing ring portion 42 can seal the gap of the bracket 32 ​​in the radial direction of the channel; in the extension direction of the channel, the first sealing ring portion 41 is provided on both sides of the second sealing ring portion 42 for sealing.

[0068] Further, please refer to Figures 1 to 10 As a specific embodiment of the machine body provided by this utility model, the inner wall of the first annular flange 116 that contacts the first sealing ring portion 41 is an annular planar surface machined by a T-shaped cutter of a CNC machine tool extending into the channel. Thus, the T-shaped cutter of the CNC machine tool can perform high-speed machining.

[0069] In one embodiment, the inner wall of the channel that contacts the second sealing ring portion 42 is a cylindrical surface machined by a T-shaped cutter of a CNC machine tool extending into the channel. This allows for high-speed machining by the T-shaped cutter of the CNC machine tool.

[0070] In one embodiment, the seal 4 also has a silicone ring 43. In one embodiment, the output shaft 311 passes through a hole inside the silicone ring 43. Specifically, see... Figure 8 A silicone ring 43 is disposed between the bracket 32 ​​and the inner wall of the channel, and the shape of the silicone ring 43 is adapted to the stepped gap formed between the bracket 32 ​​and the channel. This allows the silicone ring 43 to better fit with the inner wall of the channel, the first annular flange 116 formed on the inner wall of the channel, the bracket 32, and the second annular flange 321 formed on the bracket 32, thereby effectively sealing the gap between the bracket 32 ​​and the inner wall of the channel. Furthermore, in the extension direction of the channel, the first sealing ring portion 41 is sandwiched between the first annular flange 116 and the silicone ring 43, and in the radial direction of the channel, the second sealing ring portion 42 is sandwiched between the silicone ring 43 and the inner wall of the channel, thereby further improving the sealing effect between the bracket 32 ​​and the inner wall of the channel.

[0071] Furthermore, the silicone ring 43, the first sealing ring portion 41, and the second sealing ring portion 42 can be integrally molded, that is, the sealing element 4 is a separate structural component, which not only facilitates the assembly of the sealing element 4 with the bracket 32 ​​and the channel, but also improves the sealing effect between the bracket 32 ​​and the inner wall of the channel.

[0072] Further, please refer to Figures 1 to 10 As a specific embodiment of the machine body provided by this utility model, a first positioning groove 1171 is provided on the inner wall of the channel, and a first hook 322 is provided on the bracket 32, which is engaged in the first positioning groove 1171. In this way, the T-shaped tool of the CNC machine tool can process at a fast speed; the bracket 32 ​​can be fixed by hooking the first hook 322 into the first positioning groove 1171.

[0073] Further, please refer to Figures 1 to 10As a specific embodiment of the machine body provided by this utility model, it also includes: a cover 33 for sealing the first end of the channel; a second positioning groove 1172 formed by a T-shaped cutter of a CNC machine tool is provided on the inner wall of the channel; and a second hook 331 is provided on the cover 33 and engaged in the second positioning groove 1172. In this way, the T-shaped cutter of the CNC machine tool can process quickly; the cover 33 can be fixed by hooking the first hook 322 into the first positioning groove 1171.

[0074] Please see Figures 1 to 10 This utility model also provides an electric toothbrush, including: a body and a brush located outside the housing 1; the brush is mounted on an output shaft 311. Thus, the motor 31 can drive the brush to move via the motor output shaft 311; due to the aforementioned body, the housing 1 has a receiving cavity 11, and the receiving cavity 11 has a receiving space 112; a motor control button 35 for controlling the motor 31 can be located within the receiving space 112; the motor 31 can be located within the receiving cavity 11, and an output hole 111 is opened on the side wall of the receiving cavity 11, through which the motor output shaft 311 of the motor 31 can pass to the external space; the plate 21 has a mounting hole 211, and a flexible pressing part 22 is filled and fixed within the mounting hole 211, allowing moisture to be released. Moisture cannot penetrate into the receiving cavity 11 from between the push part 22 and the mounting hole 211; when the user presses the push part 22, the push part 22 can deform; a window 113 is provided on the side wall of the receiving cavity 11, and the sheet 21 covers and seals the window 113, which can prevent moisture from entering the receiving cavity 11 through the window 113; when the user presses the push part 22, the push part 22 deforms, and during the deformation process, the push part 22 can contact the motor control button 35 in the receiving space 112, and the motor control button 35 can be pressed when the push part 22 contacts the motor control button 35.

[0075] Please see Figure 11 The machining method of the machine body is as follows: S1: Prepare raw materials; S2: Unload the raw materials; S3: Form the blank of the shell 1 by extrusion; S4: Cut off the head and tail of the shell 1 respectively; S5: Complete the machining of the first sliding groove 1151 and the second sliding groove 1152 inside the machine body by milling cutter; S6: Form the tapered part 114 by spin extrusion; S7: Adjust the shape of the blank; S8: Machin the second positioning groove 1172 and the surface of the first annular flange 116 that mates with the first sealing ring part 41 by T-cutting cutter of CNC machine tool;

[0076] S9: Polish the surface of housing 1; S10: Sandblast the surface of housing 1; S11: Electroplat the connection between housing 1 and the anode; S12: Assemble housing 1 and sheet 21; S13: Inspect housing 1.

[0077] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A fuselage, characterized in that, include: The device comprises a housing, a cavity located within the housing for housing an electric motor, a sheet having a mounting hole, a flexible push button fixed within the mounting hole, a receiving space disposed within the receiving cavity for housing a motor control button, and a window formed on the side wall of the receiving cavity and communicating with the receiving cavity; the sheet covers and seals the window; the receiving space is located on the deformation path of the push button when pressed.

2. The fuselage as described in claim 1, characterized in that, The inner wall of the mounting hole has a first step, and the edge of the flexible pressing part has a second step that engages with the first step.

3. The fuselage as described in claim 1, characterized in that, The sheet is a single piece made of a bendable material; an annular positioning groove extending along the edge of the window is provided on the inner wall of the window; the edge of the sheet is bent and can be inserted into the annular positioning groove; the sheet is bonded and fixed to the side wall of the annular positioning groove.

4. The fuselage as described in claim 3, characterized in that, There is a first gap between the sheet body and the bottom of the annular positioning groove, and there is a second gap between the sheet body and the edge of the annular positioning groove; the first gap is larger than the second gap.

5. The fuselage as described in claim 1, characterized in that, The edge of the sheet is fixed to the edge of the window by adhesive.

6. The fuselage as described in claim 5, characterized in that, The sealant is: waterproof foam adhesive.

7. The fuselage as described in claim 1, characterized in that, The button is a one-piece piece made of thermoplastic polyurethane.

8. The fuselage as described in claim 1, characterized in that, The sheet is a transparent sheet.

9. The fuselage as described in claim 8, characterized in that, The sheet is a polycarbonate sheet.

10. The fuselage as described in any one of claims 1 to 9, characterized in that, Also includes: A bracket disposed within the accommodating cavity, a motor mounted on the bracket and having an output shaft, an output hole formed on the side wall of the accommodating cavity for the output shaft of the motor to pass through, and a motor control button disposed on the bracket and electrically connected to the motor; the motor control button is located within the accommodating space; the output shaft passes through the output hole to the outside of the accommodating cavity.

11. The fuselage as described in claim 10, characterized in that, The housing is an integral piece formed by extruding an aluminum alloy block; and the housing has a tapered portion formed by spinning; the output hole is opened on the tapered portion.

12. The fuselage as described in claim 10, characterized in that, The accommodating cavity is a channel formed on the housing and extending in a straight line; the inner wall of the channel has a first groove extending along the channel and a second groove extending along the channel; the bracket can enter the channel through the first end of the channel, and the second end of the channel communicates with the output hole; one end of the bracket is slidably disposed in the first groove, and the other end of the bracket is slidably disposed in the second groove.

13. The fuselage as described in claim 12, characterized in that, Also includes: A sealing element; the gap between the bracket and the inner wall of the channel is sealed by the sealing element.

14. The fuselage as described in claim 13, characterized in that, The sealing element has a first sealing ring portion; the inner wall of the second end of the channel has a first annular flange; the bracket has a second annular flange; in the extending direction of the channel, the first sealing ring portion is clamped and sealed between the first annular flange and the second annular flange.

15. The fuselage as described in claim 14, characterized in that, There are multiple first annular flanges, multiple second annular flanges, and multiple first sealing ring portions; the multiple first annular flanges, the multiple first sealing ring portions, and the multiple second annular flanges correspond one-to-one.

16. The fuselage as described in claim 14, characterized in that, The sealing element has a second sealing ring portion; the bracket is fitted with the second sealing ring portion; in the radial direction of the channel, the second sealing ring portion seals the gap between the bracket and the inner wall of the channel; in the extending direction of the channel, at least one first sealing ring portion is provided on each side of the second sealing ring portion.

17. The fuselage as described in claim 16, characterized in that, The inner wall of the first annular flange that contacts the first sealing ring is an annular planar surface machined by a T-shaped tool of a CNC machine tool extending into the channel; And / or the inner wall of the channel that contacts the second sealing ring is a cylindrical surface machined by a T-shaped tool of a CNC machine tool extending into the channel.

18. The fuselage as described in claim 12, characterized in that, The inner wall of the channel is provided with a first positioning groove, and the bracket is provided with a first hook that is engaged in the first positioning groove.

19. The fuselage as described in claim 12, characterized in that, Also includes: A cap is provided to seal the first end of the channel; a second positioning groove is provided on the inner wall of the channel by a T-shaped cutter of a CNC machine tool; a second hook is provided on the cap to be engaged in the second positioning groove.

20. An electric toothbrush, characterized in that, include: The housing and the brush located outside the housing as described in any one of claims 10 to 19; The brush is mounted on the output shaft.

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