CN215345339U - Shell, diaphragm and electronic equipment - Google Patents

Abstract

The application discloses a shell, a diaphragm and electronic equipment, wherein the shell comprises a shell base body, and a plurality of grooves which are arranged at intervals are defined on the surface of the shell base body; wherein an inclination angle of the side wall face of the groove with respect to the surface of the housing base is 30 ° to 60 °. Through the mode, the hydrophobic effect, the abrasion resistance and the durability of the shell can be improved, and the use requirements of users are met.

Description

Shell, diaphragm and electronic equipment

Technical Field

The present application relates to the field of electronic devices, and in particular, to a housing, a diaphragm, and an electronic device.

Background

Due to the demands in terms of appearance, function, and the like, many production and living tools, such as electronic devices, home appliances, and the like, have housings, diaphragms, and the like.

As the external structure, when the user uses the touch pad, the touch pad may repeatedly touch and rub the housing and the membrane, so that the user may easily get fingerprints and stains.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application mainly solved provides a casing, diaphragm and electronic equipment, can improve the hydrophobic effect and wear-resisting, the durability of casing, satisfies user's operation requirement.

In order to solve the technical problem, the application adopts a technical scheme that: providing a shell, wherein the shell comprises a shell base body, and a plurality of grooves which are arranged at intervals are defined on the surface of the shell base body; wherein an inclination angle of the side wall face of the groove with respect to the surface of the housing base is 30 ° to 60 °.

In order to solve the above technical problem, another technical solution adopted by the present application is: providing a diaphragm, wherein the surface of the diaphragm is defined with a plurality of grooves arranged at intervals, wherein the inclination angle of the side wall surface of each groove relative to the surface of the shell base body is 30-60 degrees; the width W of the top of each groove is 40-100 μm, the depth D of each groove is not less than 8 μm, the distance L between the tops of two adjacent grooves is 4-40 μm, and the following conditions are met: w is not less than 2L, and

in order to solve the above technical problem, the present application adopts another technical solution: there is provided an electronic device comprising a housing as described above and/or a membrane as described above.

The beneficial effect of this application is: in the present application, the surface of the housing base defines a plurality of grooves spaced apart from each other, and the side wall surfaces of the grooves are inclined at an angle of 30 ° to 60 ° with respect to the surface of the housing base, unlike the prior art. Through this kind of mode, can make the lateral wall between recess and the adjacent recess have suitably arrange and the size proportion is in order to form effectual hydrophobic structure, can keep this hydrophobic structure's stability, firm and difficult by external force damage under repeated external force touching, friction simultaneously to can improve the antifriction of casing, have lasting hydrophobic effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic structural diagram of an embodiment of an electronic device according to the present application;

FIG. 2 is a partial cross-sectional view of an embodiment of the present application housing;

FIG. 3 is a partial cross-sectional view of one embodiment of the electronic device of the present application;

FIG. 4 is a partial cross-sectional view of an embodiment of the present application housing;

FIG. 5 is a partial schematic structural view of an embodiment of the present application housing;

fig. 6 is a partially enlarged view of a portion a in fig. 5;

FIG. 7 is a partial cross-sectional view of an embodiment of the present application housing;

FIG. 8 is a partial cross-sectional view of another embodiment of the shell of the present application;

FIG. 9 is a partial cross-sectional view of another embodiment of the shell of the present application;

FIG. 10 is a partial cross-sectional view of another embodiment of the shell of the present application;

FIG. 11 is a partial cross-sectional view of another embodiment of the shell of the present application;

FIG. 12 is a view showing an appearance of a case base m in the related art;

FIG. 13 is an optically enlarged view of portion B of FIG. 12 at 1000 times;

FIG. 14 is a view showing the appearance of the housing base n according to the present application;

FIG. 15 is an optical enlargement 1000 times of the portion C of FIG. 14;

FIG. 16 is a partial cross-sectional view of an embodiment of the present application housing;

FIG. 17 is a partial top view of an embodiment of the present application housing;

FIG. 18 is a partial top view of another embodiment of the shell of the present application;

FIG. 19 is a partial top view of another embodiment of the shell of the present application;

FIG. 20 is a partial top view of another embodiment of the shell of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, in an embodiment, an electronic device includes a housing 10 and a functional device 20. The housing 10 and the screen of the electronic device define an accommodating space for accommodating the functional device 20, so as to protect the functional device 20 (e.g., a motherboard, a battery, etc.).

Specifically, the electronic device may be a mobile phone, a tablet computer, a notebook computer, an intelligent bracelet, an intelligent watch, and the like, and the housing 10 may be a front shell, a frame, a rear cover, and the like of the electronic device, which are not limited herein.

Further, the electronic device may further include a diaphragm. In an application scenario, referring to fig. 2, the diaphragm may be a part of the housing 10, specifically, the housing 10 may include a housing base 11, a bonding layer 12, and a diaphragm 13, and the diaphragm 13 is bonded on the housing base 11 through the bonding layer 12 and may be used as an explosion-proof film, a decoration film, a protection film, and the like. In another application scenario, referring to fig. 3, the film 30 is a structure independent from the housing 10, and can be attached to other structural surfaces of the electronic device in a certain manner, such as a protective film of a screen of the electronic device, which is not limited herein.

It is easy to understand that, whether the housing or the membrane is used as an external structure of the electronic device, a user may repeatedly touch the electronic device during the use of the electronic device, and fingerprints, stains, and other marks may be easily left on the surface of the electronic device, which may affect the aesthetic appearance of the electronic device, or even affect the use of the electronic device, and thus it is necessary to improve the contamination resistance of the housing or the membrane by a certain means. The following description will be made by taking the case as an example. The structure, function, material, and the like of the diaphragm in the present application are the same as those of the housing described below unless otherwise specified.

Referring to fig. 4, in one embodiment, the housing 10 may include a housing base 11 and one or more other layer structures formed on the housing base 11, such as at least one of a light shielding layer 14 for shielding light, a color layer 15 with a certain color, a reflective layer 16 for reflecting incident light to present a certain gloss, a texture layer 17 with a texture pattern to present a texture effect, and the like. Wherein, each layer of structure can face the shell substrate towards the side of the electronic device.

In other embodiments, the housing 10 may further include only the base 11, which is not particularly limited herein. Here, when the film is a protective film attached to a screen of an electronic device, the light-shielding layer 14 may not be included.

Specifically, the material of the housing base 11 may be glass, plastic, or a composite material of glass, plastic, metal, ceramic, or the like, and is not particularly limited herein. The casing base member can be transparent material, or opaque material, can have certain colour, also can be colourless, specifically can select according to actual demand. When the film is a protective film attached to the screen of the electronic device, the film is usually made of a transparent material, or at least a part of the area is made of a transparent material.

In the related art, the super-hydrophobic material is often adopted to improve the dirt resistance requirement of the shell, and particularly, the hydrophobic layer can be formed on the surface of the shell substrate in a coating, deposition and other modes, so that the dirt is prevented from being stained on the surface of the shell, and the dirt can be easily removed after water-based, oil-based and other dirt is stained.

For example, in a related technology, taro leaves are used as a mother board, a surface structure with fine cavities is constructed by a template method, modification is performed by a dip coating method, and the hydrophobicity is remarkably improved after modification by poly-n-octadecyl siloxane nano-sheets. In another related technology, SF6 is used as a plasma source, a plasma etching method is used for obtaining the silicon surface with the micron-sized rod-shaped structure, C4F8 is used as the plasma source, a layer of fluorocarbon film is deposited on the silicon surface with the micron-sized rod-shaped structure, and through tests, the hydrophobic performance is also greatly improved.

However, although the above-mentioned related technologies have a satisfactory hydrophobic effect when initially used, on the one hand, the superhydrophobic materials used are mostly fluorine-containing or silane compounds, which are expensive; on the other hand, the hydrophobic coating is often formed on a substrate in a coating form in the preparation process, and the durability, the aging resistance and the firmness are all unreliable, so that the hydrophobic effect is short in maintaining time, and the use requirement of a user cannot be met.

Based on this, the structure of the shell base body can be improved in the application to improve the hydrophobicity of the shell, and meanwhile, the shell has good abrasion resistance, so that the hydrophobicity of the shell is kept more durable.

Specifically, referring to fig. 5, in one embodiment, a plurality of grooves 111 are defined on the surface of the housing base 11.

Note that the groove 111 in the present embodiment is formed directly on the case base 11, that is, the groove 111 is defined by the case base 11 itself, and is not formed on the coating applied on the case base 11.

In particular, the groove 111 can be formed in various ways, and in one application scenario, glass, such as corning GG5 glass, can be used as the material of the housing base 11. Specifically, a negative photoresist with high viscosity may be spin-coated on glass, then a corresponding mold is used to transfer a desired three-dimensional structure onto the photoresist, the photoresist is further cured, and finally the three-dimensional structure is transferred onto the glass by etching, thereby obtaining the housing base 11 having the plurality of grooves 111.

In the present embodiment, the plurality of grooves 111 are formed on the surface of the housing base 11 to increase the roughness of the surface of the housing base 11, thereby increasing the hydrophobicity of the surface thereof. However, the forming manner of the groove 111 on the housing base 11 is not limited in this application, and an appropriate manner may be selected according to actual requirements in the actual application process.

Further, referring to fig. 6 to 11, in an embodiment, the width of the top of each groove 111 is W, the depth of each groove 111 is D, and the distance between the tops of two adjacent grooves 111 is L.

It should be noted that the grooves 111 defined by the housing base 11 are all communicated with the outside through corresponding openings on the surface of the housing base 11, the top of the groove 111 is the corresponding opening, and the bottom of the groove 111 is the end away from the opening. The depth D of the groove 111 is the vertical distance between the top and bottom of the groove 111.

In one embodiment, the above parameters of the groove 111 may satisfy: w is not less than 2L, and

it should be noted that, in the present embodiment, the groove 111 on the surface of the housing base 11 conforms to a cassie model, so that the surface of the housing base has a certain capillary effect and a certain supporting effect on water, thereby improving the hydrophobicity of the housing base 11 and enabling the housing to have a good hydrophobic effect.

Further, the width W of the top of the groove 111 may be 40-100 μm, the depth D of the groove 111 may be not less than 8 μm, and the distance L between the tops of two adjacent grooves 111 may be 4-40 μm.

Specifically, the width W of the top of the groove 111 may be 40 μm, 60 μm, 80 μm, 100 μm, etc., the depth D of the groove 111 may be 8 μm, 9 μm, 10 μm, etc., and the distance L between the tops of two adjacent grooves 111 may be 4 μm, 8 μm, 24 μm, 32 μm, 40 μm, etc.

It should be noted that the dimensions of the grooves 111 and the side walls between adjacent grooves 111 in the present embodiment satisfy the above requirements, on one hand, the dimensions required by the electronic device can be adapted, and on the other hand, the grooves 111 and the side walls of the housing base 11 are more matched and harmonized, so that the housing 10 has better hydrophobicity.

Further, in one embodiment, the corresponding side wall of the groove 111 is inclined with respect to the surface of the housing base 11. Specifically, the width of the groove 111 gradually decreases in a direction a from the top toward the bottom of the groove 111, so that the thickness of the sidewall between two adjacent grooves 111 gradually increases in the direction a from the top toward the bottom of the groove 111.

Specifically, the side wall of the groove 111 may be a flat surface or a curved surface as long as the width of the defined groove 111 is gradually reduced in the direction a from the top toward the bottom of the groove 111.

Specifically, in one application scenario, as shown in fig. 7, the width of the groove 111 decreases linearly and uniformly in a direction a from the top to the bottom of the groove 111, so that the thickness of the sidewall between two adjacent grooves 111 also increases linearly and uniformly in the direction a. It should be noted that in this application scenario, the side wall of the groove 111 may be a plane, or may also be a curved surface, for example, the shape of the groove 111 may be an inverted circular truncated cone, an inverted cone, or the like, which is not limited herein.

In another application scenario, as shown in fig. 8, in a direction a from the top to the bottom of the groove 111, the width of the groove 111 gradually decreases from slow to fast, so that the thickness of the sidewall between two adjacent grooves 111 also gradually increases from slow to fast in the direction a, and finally the formed sidewall is in a "contracted" state.

In another application scenario, as shown in fig. 9, in a direction a from the top to the bottom of the groove 111, the width of the groove 111 gradually decreases from fast to slow, so that the thickness of the sidewall between two adjacent grooves 111 also gradually increases from fast to slow in the direction a, and finally the formed sidewall is in an "expanded" state.

In another application scenario, as shown in fig. 10, in a direction a from the top of the groove 111 to the bottom, the width of the groove 111 gradually decreases from slow to fast, and then gradually decreases from fast to slow, so that the thickness of the sidewall between two adjacent grooves 111 also gradually increases from slow to fast in the direction a, and then gradually increases from fast to slow, so that the finally formed sidewall is in a state of "expansion" at the bottom and "contraction" at the top.

In another application scenario, as shown in fig. 11, in a direction a from the top of the groove 111 to the bottom, the width of the groove 111 gradually decreases from fast to slow, and then gradually decreases from slow to fast, so that the thickness of the sidewall between two adjacent grooves 111 also gradually increases from fast to slow, and then gradually increases from slow to fast in the direction a, so that the finally formed sidewall is in a state of "shrinking" at the bottom and "expanding" at the top.

Certainly, in other application scenarios, other manners may also be adopted, for example, the thickness of the side wall between two adjacent grooves 111 may also be gradually increased from slow to fast in the direction a, then linearly and uniformly increased, and then gradually increased from fast to slow, and the like, and the selection may be specifically performed according to actual requirements, and is not specifically limited herein.

It should be noted that, because the plurality of grooves 111 are formed on the base body, the base body 11 of the housing can also have a certain texture effect, so that the housing is more beautiful. Further, in the above embodiment, the thickness of the side wall between two adjacent grooves 111 in the direction a gradually increases. Because the user uses the electronic equipment in-process, the casing can receive repeated touching and friction, and this kind of mode of setting up of lateral wall can make the connection between lateral wall and the bottom more firm, and the external force that can bear is also bigger relatively to in the used repeatedly process, can reduce the impaired probability of lateral wall, thereby can improve the durability of casing hydrophobic effect.

Further, in an embodiment, the inclination angle θ of the side wall surface of the groove 111 with respect to the surface of the housing base 11 may be 30 ° to 60 °, specifically, 30 °, 40 °, 50 °, 60 °, and the like, which is not limited herein.

Note that, in some application scenarios, as shown in fig. 7, the side wall surface of the groove 111 is a plane, and in this case, the inclination angle may refer to an included angle between the side wall surface of the groove 111 and the surface of the housing base 11.

In other application scenarios, as shown in fig. 8 to 11, the sidewall surface of the groove 111 is a curved surface extending along the depth direction of the groove 111, and in this case, the inclination angle θ may refer to an included angle between a plane where the top edge and the corresponding bottom edge of the groove 111 are located and the surface of the housing base 11. The top edge of the groove 111 is the edge of the housing base 11 at the corresponding opening of the groove 111, and the bottom edge of the groove 111 is the edge of the housing base 11 for defining the bottom of the corresponding groove 111. It should be noted that, when the top edge and/or the corresponding bottom edge of the groove 111 are/is arc-shaped, so that the side wall surface of the groove 111 is an arc-shaped surface, the plane may be a tangent plane of the arc-shaped surface.

It should be noted that, when the housing base 11 further satisfies the angle range, the grooves 111 and the side walls between adjacent grooves 111 can be properly arranged and sized to form a hydrophobic structure with good effect, and the hydrophobic structure can be kept stable and firm under repeated external force touch and friction while having good hydrophobicity, and is not easily damaged by external force, so that the wear resistance of the housing base 11 can be improved, and the durable hydrophobic effect can be achieved.

In a related art, the casing substrate m is made of glass, and a plurality of grooves are defined on the surface of the casing substrate m, wherein: the width W of the top of each groove is 40-100 mu m, the depth D is not less than 8 mu m, and the distance L between the tops of two adjacent grooves is 4-40 mu m. Specifically, in an application scenario, the width W of the top of each groove in the housing base m is 100 μm, the depth D is 8 μm, and the distance L between the tops of two adjacent grooves is 7.66 μm. However, unlike the case base 11 in the above-described embodiment of the present application, in the case base m, the inclination angle of the side wall surface of the groove with respect to the case base surface is 90 °, that is, the thickness of the side wall between two adjacent grooves is uniform in the depth direction of the groove.

In contrast, in an application scenario of the present application, the material of the housing base n is also glass, wherein the width W of the top of each groove 111 is 100 μm, the depth D of each groove 111 is 15.1 μm, the distance L between the tops of two adjacent grooves 111 is 4.974 μm, and the inclination angle θ of the side wall surface of each groove 111 relative to the surface of the housing base 11 is 40 °.

Rubber friction tests are respectively carried out on the shell matrixes m and n for 1000 times, specifically, 0.6cm of industrial rubber is used, the load is 500g, the cycle/min is 40 times, the stroke length is 3cm, then the appearance and the appearance of a friction part are observed, the obtained test results are respectively shown in figures 12-15, and the related data are shown in the following table 1.

TABLE 1 data relating to the housing base m and the housing base n

Item	W/μm	L/μm	D/μm	θ
					Shell matrix m	100	7.66	8	90°
Housing base n	100	4.974	15.1	40°

Fig. 12 and 14 are appearance profile diagrams of the housing bases m and n photographed by a camera, respectively, and fig. 13 and 15 are profiles of the housing bases m and n corresponding to the portion B in fig. 12 and the portion C in fig. 13 magnified 1000 times by a kirschner optical microscope, respectively. As can be seen from FIGS. 12-15, the glass surface of the casing substrate m was broken and not penetrated after 1000 times of abrasion resistance; and after partial enlargement, most of the groove structure is not visible. The surface of the shell matrix n is still bright after 1000 times of friction resistance, and no scratch is generated; as can be seen from the enlarged partial view, the groove structure is still clearly visible and not destroyed. And because after groove structure is destroyed, hydrophobic effect can greatly reduced, is difficult to play hydrophobic effect even, combines table 1, can find out that the groove structure in the casing base member n that satisfies the inclination angle theta requirement of injecing among the above-mentioned embodiment of this application has good antifriction to can make its hydrophobic effect maintain more lasting.

It should be noted that, for different grooves 111 in the housing base 11, the above parameters may be the same or different, and may be determined according to actual requirements as long as the above requirements are met, and are not limited herein.

In addition, the initial water drop angle of the casing 10 in the above embodiment of the present application, i.e., the water drop angle before the rubbing test is 130 ° to 150 °, and the water drop angle after the foregoing 1000 rubbings tests can still satisfy 125 ° to 135 °, thereby further demonstrating that the casing 10 in the above embodiment not only has excellent hydrophobicity, but also has good abrasion resistance and durability.

Further, the groove 111 may have a regular shape or an irregular shape, and when the groove 111 has a regular shape, it may be an inverted cone, an inverted polygonal pyramid (both the inverted cone and the inverted polygonal pyramid can be illustrated in fig. 16), an inverted truncated cone (as illustrated in fig. 17), an inverted polygonal truncated pyramid, or the like.

Specifically, when the shape of the groove 111 is an inverted polygonal pyramid, an inverted polygonal frustum, the shape of the groove 111 on a plane perpendicular to the depth direction, that is, the polygon, may be a quadrangle, a hexagon, a right triangle, or the like. As shown in fig. 18 to 20, the shape of the groove 111 in fig. 18 is an inverted quadrilateral frustum, the shape of the groove 111 in fig. 19 is an inverted hexagonal frustum, and the shape of the groove 111 in fig. 20 is an inverted triangular frustum. Of course, the above is merely an example, and the shape of the groove 111 may be other shapes, such as a triangle, a pentagon, etc., and is not limited herein.

It should be noted that the shape of each groove 111 may be the same, may also be different, may be uniformly arranged, and may also be non-uniformly arranged, as long as the above requirements are met. In one application scenario, the plurality of grooves 111 may be arranged in an array, as shown in fig. 17 and 18, so that the surface of the housing base 11 has a uniform hydrophobicity. The number of rows and columns of the array can be set according to the size of the housing base 11 and the shape and size of the groove 111, and is not limited herein.

The housing according to the above-described embodiment of the present application will be described below with reference to specific examples.

It should be noted that, the housing substrates in each of the following examples 1-3 and comparative examples 1-3 are made of corning GG5 glass, wherein the grooves of the housing substrates in each of examples 1-3 and comparative examples 2-3 are formed by transferring the required three-dimensional structure onto the glass by using the groove forming method in the foregoing embodiment to form a plurality of grooves with certain shapes and sizes, so as to obtain the corresponding housing substrates.

Wherein, the shell base bodies in the examples 1, 2 and 3 all meet the requirements of the above embodiments of the application; the case base in comparative example 1 does not have the groove structure in each of the above embodiments; in the case bases of comparative examples 2 and 3, the inclination angle θ of the side wall face of the groove with respect to the surface of the case base is out of the range of the aforementioned requirement, as compared with the case base required in each of the above embodiments.

After the housing substrates in each of the examples and comparative examples were obtained, the corresponding initial water drop angle α was measured by a water drop angle measuring instrument, and then the rubber friction test as described above was performed on each housing substrate, and the water drop angle after the friction of each housing substrate was further measured after the test was completed. The data involved are shown in table 2 below:

table 2 data relating to the base of the housings of the examples and comparative examples

Item

Example 1

Example 2

Example 3

Comparative example 1

Comparative example 2

Comparative example 3

W/μm

52.35

68.21

73.25

/

70.64

75.45

L/μm

13.35

17.36

17.54

/

17.24

17.93

D/μm

17.7

8.1

8.0

/

8.1

8.3

θ

30°

60°

30°

/

10°

90°

α

150°

134°

131°

114°

121°

135°

β

130°

127°

125°

100°

115°

87°

As is apparent from the above data, the casing substrates of examples 1 to 3 have large water drop angles α and β before and after the rubbing test, wherein the initial water drop angle α is 130 ° or more, and the water drop angle β after the rubbing test is 125 ° or more, and have good hydrophobicity and abrasion resistance; the water drop angles α and β before and after the test of the case base in comparative examples 1 to 4 were small compared to those in examples 1 and 2.

Wherein, in the comparative example 1, no groove structure is formed on the surface of the shell substrate, and the water drop angles α and β before and after the friction test are both much smaller than those of the examples 1 to 3, so that the shell with the groove has relatively better hydrophobic effect; theta in comparative example 2 was 10 deg., theta in comparative example 3 was 90 deg., and theta in comparative example 3 was not more than 30 deg. and not more than 60 deg. as required in the foregoing embodiment, and alpha and beta were also significantly different from those in examples 1 and 2, in contrast, the initial water drop angle alpha of comparative example 2 was smaller, whereas in comparative example 3, the initial water drop angle alpha was larger, but the water drop angle beta was greatly reduced after the rubbing test, much lower than in examples 1 to 3, and even lower than that of the case base in comparative example 1 without the groove structure. That is, the groove structure of the case base 11 in comparative example 3 is not resistant to abrasion although the initial hydrophobicity is acceptable, and the durability of the hydrophobic effect is poor.

As can be seen from the above analysis, the case base having the groove structure has a certain effect, and the case base having the grooves satisfying W, L, D and θ defined in the embodiments of the present application has good hydrophobicity, abrasion resistance, and durability; in addition, if the angle θ is too small, the hydrophobicity of the case is relatively weak, and if the angle θ is too large, the durability of the hydrophobic effect is affected.

In summary, the housing base in the embodiments described above in the present application has good hydrophobicity and good durability, so as to improve the hydrophobic effect of the housing. And then can greatly reduce the attachment of fingerprints, stains and the like on the shell in the process that a user uses the electronic equipment, so that the electronic equipment can maintain clean appearance, and the use requirements of the user are met.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims (10)

1. The shell is characterized by comprising a shell base body, wherein a plurality of grooves arranged at intervals are defined on the surface of the shell base body;

wherein an inclination angle of the side wall face of the groove with respect to the surface of the housing base is 30 ° to 60 °.

2. The housing of claim 1, wherein the width W of the top of the groove and the distance L between the tops of two adjacent grooves satisfy: w is not less than2L, and

3. the housing of claim 2, wherein the housing base satisfies: the width W of the top of the groove is 40-100 μm, the depth D of the groove is not less than 8 μm, and the distance L between the tops of two adjacent grooves is 4-40 μm.

4. The housing of claim 1, wherein the initial water drop angle of the housing is between 130 ° and 150 °.

5. The housing of claim 1 wherein the housing has a water drop angle of 125 ° -135 ° after 1000 eraser tests.

6. The housing of claim 1, wherein the recess is in the shape of an inverted frustum or cone.

7. The housing according to claim 6, wherein the shape of the groove on a plane perpendicular to the depth direction is at least one of a quadrangle, a hexagon, and a pair of triangles.

8. The housing of claim 1, further comprising at least one of a light-shielding layer, a color layer, a reflective layer and a texture layer, wherein the at least one of the light-shielding layer, the color layer, the reflective layer and the texture layer is disposed on a side of the housing base facing away from the groove.

9. A diaphragm, wherein a surface of the diaphragm defines a plurality of grooves arranged at intervals, wherein a side wall surface of the grooves has an inclination angle of 30 ° to 60 ° with respect to the surface of the diaphragm;

the width W of the top of the groove is 40-100 μm, and the depth of the grooveD is not less than 8 μm, the distance L between the tops of two adjacent grooves is 4-40 μm, and satisfies: w is not less than 2L, and

10. an electronic device comprising a housing according to any of claims 1-8 and/or a membrane according to claim 9.

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