Handheld appliance

Abstract

The handheld appliance comprises a shell and a cover body, the shell is provided with a containing cavity and an opening communicated with the containing cavity, the cover body is installed at the opening, and the cover body is provided with a first section and a second section which are located on the inner side of the opening; the first section is adjacent to the opening, the second section is far away from the opening, and a gap between the peripheral wall of the first section and the cavity wall of the accommodating cavity is smaller than a gap between the peripheral wall of the second section and the cavity wall of the accommodating cavity. According to the handheld appliance, the gap between the shell and the cover body is designed in a sectional mode, and the problems that the fit clearance between the shell and the cover body is large, the attractiveness is poor, and particularly part of the surface structure falls off due to the fact that the shell and the cover body are scraped in the assembling process are solved.

Description

Technical Field

[0001] This application relates to the field of personal care devices, and particularly to a handheld appliance. Background Art

[0002] Currently, for handheld appliances in the market, such as electric toothbrushes, electric shavers, etc., openings are provided on the housing, and internal components are installed into the housing through these openings and then the openings are closed by a cover. If the fitting gap between the housing and the cover is large and the gap is unevenly distributed circumferentially, the aesthetics is poor; if the fitting gap between the housing and the cover is too small, the housing and the cover often scrape during assembly, resulting in the detachment of some surface layer structures.

[0003] The above content is only used to assist in understanding the technical solution of the utility model and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0004] In view of the above problems, the present utility model provides a handheld appliance, aiming to solve the technical problems such as large fitting gap between the housing and the cover, poor aesthetics, and scraping during assembly resulting in the detachment of some surface structures.

[0005] To achieve the above object, a handheld appliance provided by the present utility model includes:

[0006] A housing, the housing is provided with a receiving cavity and an opening communicating with the receiving cavity;

[0007] A cover, the cover is installed at the opening, the cover has a first section and a second section located inside the opening, the first section is adjacent to the opening, the second section is away from the opening, and the gap between the outer peripheral wall of the first section and the cavity wall of the receiving cavity is smaller than the gap between the outer peripheral wall of the second section and the cavity wall of the receiving cavity.

[0008] Further, the first section has a first sub-section and a second sub-section connected in the direction of the opening, the first sub-section is adjacent to the opening, the second sub-section smoothly connects the first sub-section and the second section; the gap between the first sub-section and the cavity wall of the receiving cavity is less than or equal to 0.05 mm.

[0009] Further, the height of the first sub-section is greater than or equal to 0.2 mm and less than or equal to 0.5 mm; the outer peripheral wall of the second sub-section is a guiding surface, and the guiding surface is inclined outward away from the opening.

[0010] Further, the extending direction of the outer peripheral wall of the first sub-section and the cavity wall of the receiving cavity from the opening inward is the same, and / or, the extending direction of the outer peripheral wall of the second section and the cavity wall of the receiving cavity from the opening inward is the same.

[0011] Further, the cover body includes an outer cover surface and a side wall connected to the inner side of the outer cover surface. The outer cover surface is located in the opening to cover the opening, and the side wall is located inside the opening and has the first section and the second section.

[0012] Further, the gap between the second section and the cavity wall of the accommodating cavity is greater than or equal to 0.06 mm and less than or equal to 0.2 mm.

[0013] Further, an annular groove is provided on the outer peripheral wall of the second section, and a sealing member is provided in the annular groove. The sealing member is in sealing fit with the cavity wall of the accommodating cavity.

[0014] Further, a bracket is provided in the accommodating cavity, and the cover body is connected to the bracket.

[0015] Further, the hardness of the material used for the housing is greater than the hardness of the cover body.

[0016] Further, the handheld device is a shaver or an electric toothbrush.

[0017] The cover body of the handheld device of the present utility model is installed at the opening of the housing. The gap between the outer peripheral wall of the cover body and the cavity wall of the accommodating cavity is designed in a segmented manner. The gap between the outer peripheral wall of the first section adjacent to the opening in the cover body and the cavity wall of the accommodating cavity is smaller than the gap between the outer peripheral wall of the second section far from the opening in the cover body and the cavity wall of the accommodating cavity. This design method of the segmented gap enables the assembly process of the housing and the cover body to effectively guide the correct positioning of the cover body, reduces the assembly error, thereby reducing the fitting gap between the housing and the cover body, improving the aesthetics at the opening, and also solving the problems such as scraping of the two components during the assembly of the housing and the cover body, resulting in the peeling off of some surface structures.

[0018] Other features and advantages of the present disclosure will be described in the subsequent description, or, some features and advantages can be inferred from the description or determined without doubt, or can be known by implementing the above technologies of the present disclosure.

[0019] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specific preferred embodiments are given below, and in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1Shows a three-dimensional partial exploded view of an embodiment of the handheld device of the present utility model;

[0022] Figure 2 Shows a partial cross-sectional view of the handheld device of the present utility model;

[0023] Figure 3 Is Figure 2 The cross-sectional view of the handheld device in

[0024] Figure 4 Is Figure 3 The enlarged partial view of part A in

[0025] Figure 5 Shows the structural schematic diagram of an embodiment of the cover body of the present utility model;

[0026] Figure 6 Is Figure 5 The enlarged partial view of part B in

[0027] Explanation of the reference numerals in the drawings:

[0028] Reference numeral Name Reference numeral Name Reference numeral Name 100 Housing 200 Cover 300 Bracket 110 Opening 210 First section 220 Second section 101 Lumen wall 211 First sub-section 212 Second sub-section 221 Seal

[0029] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously.

[0033] The present utility model provides a handheld appliance, which may specifically be a shaver or an electric toothbrush.

[0034] In the embodiments of the present utility model, please refer to Figures 1 to 6 , this handheld appliance includes a housing 100 and a cover 200.

[0035] The housing 100 is provided with a receiving cavity and an opening 110 communicating with the receiving cavity. Internal components such as the motor, battery, and circuit board of the handheld appliance can be installed into the receiving cavity of the housing 100 through the opening 110. Preferably, the opening 110 is provided at the bottom end of the housing 100. It can be understood that the opening 110 is not limited to being provided at the bottom end of the housing 100. In addition, the thickness of the housing 100 of handheld appliances such as shavers or electric toothbrushes varies according to specific product models, designs, materials, and manufacturers. Generally speaking, the thickness of this housing 100 may be between 2 mm and 5 mm. This thickness can not only ensure the durability and structural strength of the product, but also keep the handheld appliance lightweight.

[0036] The cover 200 is disposed at the opening 110. The cover 200 has a first section 210 located inside the opening 110 and a second section 220. The first section 210 is adjacent to the opening 110, and the second section 220 is away from the opening 110. The gap between the outer peripheral wall of the first section 210 and the cavity wall 101 of the receiving cavity is smaller than the gap between the outer peripheral wall of the second section 220 and the cavity wall 101 of the receiving cavity. In addition, a charging port is provided on the cover 200, and the charging port can be exposed or covered and hidden by a waterproof cover.

[0037] In the prior art, the design of the gap between the outer peripheral wall of the cover and the cavity wall of the housing receiving cavity adopts the same gap. If the mating gap between the two is too small, it will cause difficult assembly. If the mating gap between the two is too large, it will cause uneven distribution of the gap in the circumferential direction, poor aesthetics, and even installation misalignment. In addition, this design will cause stress concentration during installation, especially at the installation position of the housing and the cover, where wear, fatigue cracks, and even surface structure detachment are likely to occur.

[0038] In the present utility model, the gap between the outer peripheral wall of the cover body 200 and the wall of the receiving cavity 101 is designed in a segmented manner. The gap between the outer peripheral wall of the first segment 210 of the cover body 200 adjacent to the opening and the wall of the receiving cavity 101 is smaller than the gap between the outer peripheral wall of the second segment 220 of the cover body 200 far from the opening and the wall of the receiving cavity 101. This segmented gap design enables the assembly process of the housing 100 and the cover body 200 to effectively guide the correct positioning of the cover body 200, reduces the assembly error, thereby reducing the fitting gap between the housing 100 and the cover body 200, improving the ornamental property at the opening, and also solving problems such as scratching between the two components during the assembly of the housing 100 and the cover body 200, resulting in the shedding of some surface structures.

[0039] In one embodiment, the cover body 200 includes an outer cover surface and a side wall connected to the inner side of the outer cover surface. The outer cover surface is located in the opening 110 to cover the opening 110, and the side wall is located inside the opening 110 and has a first segment 210 and a second segment 220. By covering the opening 110 with the outer cover surface, the housing 100 has a complete appearance. The side wall having the first segment 210 and the second segment 220 cooperates with the wall of the receiving cavity 101 to achieve the segmented design of the gap between the outer peripheral wall of the cover body 200 and the wall of the receiving cavity 101.

[0040] In one embodiment, please refer to Figure 5 、 Figure 6 , the first segment 210 of the handheld device has a connected first sub-segment 211 and a second sub-segment 212. Among them, the first sub-segment 211 is adjacent to the opening 110, and the second sub-segment 212 smoothly connects the first sub-segment 211 and the second segment 220; the gap between the first sub-segment 211 and the wall of the receiving cavity 101 is less than or equal to 0.05 mm. By smoothly connecting the first sub-segment 211 and the second segment 220 through the second sub-segment 212, the manufacturing process is simplified, which is easier to process than the manufacturing process with a folded corner, thereby reducing the production cost. In addition, using the second sub-segment 212 as a smooth guiding surface enables the efficient and convenient assembly of the cover body 200 and the housing 100, and at the same time, it can reduce the assembly error between the cover body 200 and the housing 100.

[0041] It can be understood that when the first sub-segment 211 is in clearance fit with the cavity wall 101, the clearance between the two is greater than 0 mm and less than or equal to 0.05 mm. The first sub-segment 211 adopts the clearance fit within this range, which not only facilitates the assembly and disassembly of the housing 100 and the cover 200, but also reduces the contact stress between the cover 200 and the housing 100, especially the excessive contact stress caused by the dimensional changes due to thermal expansion and contraction caused by temperature. In addition, the clearance fit within this range allows a certain degree of freedom of movement of the cover 200 within the housing 100, which compensates for the tolerances generated during the manufacturing process, reduces the manufacturing cost, makes the connection between the cover 200 and the housing 100 more flexible and convenient, easy to disassemble and assemble, and convenient for maintenance and replacement. When the first sub-segment 211 and the cavity wall 101 adopt an interference fit design, the clearance between the two is 0 mm. The interference fit design of the first sub-segment 211 can achieve the precise positioning of the housing 100 and the cover 200, improve the sealing performance between the first sub-segment 211 and the cavity wall 101, and also improve the structural strength, enabling it to withstand higher dynamic loads and maintain the stability of the position.

[0042] Furthermore, the height of the first sub-segment 211 is 0.2 - 0.5 mm. Specifically, the height of the first sub-segment 211 is 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm. When the height of the first sub-segment 211 is greater than 0.5 mm, the length of the first sub-segment 211 inserted into the housing 100 is too long, and the clearance between the first sub-segment 211 and the cavity wall 101 of the accommodating cavity is too small, resulting in inconvenient installation and disassembly. If the height of the first sub-segment 211 is less than 0.2 mm, the height of the first sub-segment 211 is too small. If it is knocked before assembly, the first sub-segment 211 is prone to deformation. After assembly, due to the too small contact area between the first sub-segment 211 and the cavity wall 101 of the accommodating cavity, the fit between the cover 200 and the housing 100 is not firm, and if subjected to external impact, the cover 200 is prone to installation angle skew and dislocation.

[0043] Preferably, the height of the first sub-segment 211 is 0.3 mm. This height can not only effectively prevent the intrusion of liquid or solid impurities, but also enable the outer peripheral wall of the cover 200 to obtain the largest possible support area, enabling it to withstand greater internal pressure or external impact, so as to enhance the overall strength and stability. Moreover, considering that the installer can easily install and disassemble the cover 200, the first sub-segment 211 is set to a height of 0.3 mm to improve the convenience of installing and maintaining the cover 200.

[0044] Furthermore, the outer peripheral wall of the first sub-segment 211 is in the same extending direction as the cavity wall 101 of the receiving cavity from the opening 110 inward, and / or the outer peripheral wall of the second segment 220 is in the same extending direction as the cavity wall 101 of the receiving cavity from the opening 110 inward. The cover 200 and the housing 100 are arranged coaxially, which will be more convenient for installation and maintenance, so that the cooperation between the two will not cause an increase in friction, nor will it cause increased wear, and will not cause damage to internal components due to the impact during installation.

[0045] Furthermore, the outer peripheral wall of the second sub-segment 212 is a guiding surface, which is inclined outward away from the opening 110. As a guiding surface during assembly, it helps the cover 200 and the housing 100 to be correctly aligned, ensuring quick, accurate assembly and precise fit between the two, and reducing the resistance during their assembly. Specifically, the guiding surface is an inclined plane or a gentle curved surface, which can effectively reduce the resistance generated during the assembly of the two.

[0046] The handheld device of the present utility model, please refer to Figure 1 , Figure 3 and Figure 4 , the second segment 220 and the cavity wall 101 of the receiving cavity are in clearance fit, and the clearance between the two is greater than or equal to 0.06 mm and less than or equal to 0.2 mm. When the clearance between the two is less than or equal to 0.06 mm, it will cause difficulty in installation, making it difficult for the cover 200 to be inserted into the housing 100, and even external force is required for installation, which may cause damage to the cover 200, and will also increase the friction and accelerate the wear between the two, causing material fatigue or crack generation and reducing the service life; when the clearance between the two is greater than or equal to 0.2 mm, it will cause a decrease in structural stability, lateral displacement during use resulting in a decrease in positioning accuracy, and accelerated wear of components, etc.

[0047] Preferably, the clearance between the two being greater than or equal to 0.06 mm and less than or equal to 0.2 mm can ensure convenient assembly of the installation parts; and can compensate for the slight changes in the clearance between the two that may be caused by factors such as manufacturing tolerances and bending of the cover 200, so as to avoid jamming or being too tight and ensure the normal cooperation between the cover 200 and the housing 100.

[0048] The handheld device of the present utility model, please refer to Figure 1 , Figure 3 and Figure 4, an annular groove is provided on the outer peripheral wall of the second section 220, and a seal 221 is provided in the annular groove. The seal 221 is in sealing cooperation with the wall 101 of the accommodating cavity. By arranging the seal in the annular groove, a tight contact surface is formed between the seal 221 and the annular groove, which can prevent the seal 221 from shifting during the assembly process of the cover body 200, and can effectively improve the sealing performance of the seal 221; and it can solve the problem that the material of the seal 221 undergoes slight deformation due to factors such as temperature change, material aging, and load change, ensuring that the seal 221 can still maintain good sealing performance during long-term use.

[0049] Furthermore, the seal 221 can adopt various sealing methods such as sealing rings, sealing cylinders, gaskets, spiral seals, and lip seals to prevent liquids and external impurities from invading the handheld device.

[0050] Preferably, the seal 221 adopts a sealing ring, and the sealing ring has a good sealing effect and is simple and easy to use compared with other seals 221 in the use of the handheld device.

[0051] In an embodiment, please refer to Figure 3 and Figure 4 , a bracket 300 is arranged in the accommodating cavity, and the cover body 200 is connected to the bracket 300. Specifically, one end of the bracket 300 close to the cover body 200 is arranged on the connecting wall, a connecting protrusion protrudes from the connecting wall, a connecting hole is arranged on the second section 220, the second section 220 is sleeved outside the connecting wall, and the connecting protrusion is embedded in the connecting hole, so as to realize the fixed connection between the cover body 200 and the bracket 300. By connecting the cover body 200 to the bracket 300, it can ensure that the cover body 300 is firmly installed at the opening, improving the structural stability.

[0052] In an embodiment, please refer to Figure 1 , the hardness of the material adopted by the housing 100 is greater than the hardness of the cover body 200. For example, the housing 100 can adopt metal materials such as aluminum alloy, titanium alloy, and stainless steel, and the cover body 200 can adopt plastic or plastic materials. Since the gap between the outer peripheral wall of the cover body 200 and the wall 101 of the accommodating cavity of the housing 100 adopts a segmented design, it can reduce the hard contact between the outer peripheral wall of the cover body 200 and the housing 100, thereby reducing the scratching during the assembly process of the cover body 200 and avoiding the shedding of the surface layer structure of the outer peripheral wall of the cover body 200.

[0053] In an embodiment, please refer to Figure 1 and Figure 2, the handheld device is a shaver or an electric toothbrush. The shaver or electric toothbrush adopting the above solution can withstand certain pressure and impact to avoid adverse effects on use caused by various external forces during use. When the environment where the shaver or electric toothbrush is used requires contact with water, dust and other pollutants, this performance can ensure the safety and stability of the internal circuit and components and extend the service life of the shaver or electric toothbrush. When the handle shell of the shaver or electric toothbrush adopts the above-mentioned segmented gap sealing design, the matching gap between the cover body 200 of the handheld device of the shaver or electric toothbrush and the handle shell is small and evenly distributed circumferentially, making the bottom end of the handle shell more beautiful in appearance design.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A handheld device, characterized in that, Comprising: A housing, the housing being provided with a receiving cavity and an opening communicating with the receiving cavity; A cover body, the cover body being mounted at the opening, the cover body having a first section and a second section located inside the opening, the first section being adjacent to the opening, the second section being away from the opening, and the gap between the outer peripheral wall of the first section and the cavity wall of the receiving cavity being smaller than the gap between the outer peripheral wall of the second section and the cavity wall of the receiving cavity.

2. The hand-held appliance according to claim 1, characterized in that, The first section has a first sub-section and a second sub-section, the first sub-section being adjacent to the opening, and the second sub-section smoothly connecting the first sub-section and the second section; the gap between the first sub-section and the cavity wall of the receiving cavity is less than or equal to 0.05 mm.

3. The hand-held implement according to claim 2, characterized in that, The height of the first sub-section is greater than or equal to 0.2 mm and less than or equal to 0.5 mm; the outer peripheral wall of the second sub-section is a guiding surface, and the guiding surface is inclined outwardly away from the opening.

4. The hand-held appliance according to claim 2, characterized in that, The extending direction of the outer peripheral wall of the first sub-section and the cavity wall of the receiving cavity from the opening inward is the same, and / or, the extending direction of the outer peripheral wall of the second section and the cavity wall of the receiving cavity from the opening inward is the same.

5. The handheld device according to claim 1, characterized in that The cover body includes an outer cover surface and a side wall connected to the inner side of the outer cover surface, the outer cover surface being located in the opening to cover the opening, and the side wall being located inside the opening and having the first section and the second section.

6. The hand-held appliance according to claim 1, characterized in that, The gap between the second section and the cavity wall of the receiving cavity is greater than or equal to 0.06 mm and less than or equal to 0.2 mm.

7. The hand-held appliance according to claim 1, characterized in that, A circular groove is provided on the outer peripheral wall of the second section, and a sealing member is provided in the circular groove, and the sealing member is in sealing cooperation with the cavity wall of the receiving cavity.

8. The hand-held appliance according to claim 1, characterized in that, A bracket is provided in the receiving cavity, and the cover body is connected to the bracket.

9. The hand-held appliance according to any one of claims 1 to 8, characterized in that, The hardness of the housing is greater than the hardness of the cover body.

10. The hand-held implement according to claim 1, characterized in that, The handheld appliance is a razor or an electric toothbrush.

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