TWI643541B - Housing, method for manufacturing the housing and electronic device using the housing - Google Patents

Abstract

A housing having at least a frame, the frame is annular, the frame includes a first edge and a second edge, the frame is for receiving a display screen, and the outer surface of the frame is disposed a protrusion having a protrusion between the first edge and the second edge, wherein an outer surface of the frame is further provided with a groove, the groove being located at the protrusion and the second Between the edges, and extending along the annular direction of the frame. The present invention also provides an electronic device having the housing and a method of fabricating the housing.

Description

Housing, manufacturing method of the same, and electronic device having the same

The present invention relates to a housing, a method of manufacturing the housing, and an electronic device having the housing.

At present, electronic products such as smart phones and tablet computers have become essential products for people's lives and work. However, most electronic products are fragile. In addition, more and more of the above-mentioned electronic products have a frame made of a metal material, and the surface of the frame itself is smooth, which easily causes the electronic product to slip off the user's hand and fall to the ground, and causes different internal components of the electronic product. The degree of damage, the outside of it will also be scratched and worn and become unsightly.

In view of this, it is necessary to provide a non-slip housing.

In addition, it is also necessary to provide a method of manufacturing the housing and an electronic device having the housing.

A housing having at least a frame, the frame is annular, the frame includes a first edge and a second edge, the frame is for receiving a display screen, and the outer surface of the frame is disposed a protrusion having a protrusion between the first edge and the second edge, wherein an outer surface of the frame is further provided with a groove, the groove being located at the protrusion and the second Between the edges, and extending along the annular direction of the frame.

A method of manufacturing a casing, comprising the steps of: providing a substrate to be processed; Machining the substrate to form a casing, the casing includes at least a frame, the frame is annular, and the frame includes a first edge and a second edge, the frame is for receiving a display screen; performing a first cutting process on the outer casing to form a protrusion on an outer surface of the frame, the protrusion being located between the first edge and the second edge; The casing of the first cutting process is subjected to a first anodizing treatment to form a first oxide layer on an outer surface of the casing; and the casing is first dyed by the first anodizing treatment Processing to form a first color layer on the first oxide layer; performing a second cutting process on the outer surface adjacent to the second edge to remove the first oxide layer and the first color on the outer surface a layer and cutting to form a protrusion; performing a third cutting process on a portion of the surface of the protrusion adjacent to the protrusion to form a groove, the groove being located at the protrusion and the second Between the edges and along the annular direction of the frame Stretching; performing a second anodizing treatment on the shell subjected to the third cutting treatment to form a second oxide layer on the protrusion and the groove; and on the second anodizing treatment The housing is subjected to a second dyeing treatment to form a second color layer on the second oxide layer.

An electronic device includes at least a display screen and a housing, and the display screen is disposed on the housing.

In summary, the arrangement of the protrusions improves the grip sensitivity of the housing, and also improves the anti-slip capability of the housing. In addition, the arrangement of the grooves can also improve the anti-slip ability. Of course, in order to improve the decorative function of the casing, a coloring agent may also be used so that the appearance surface of the casing has a color desired by the user.

10‧‧‧shell

101‧‧‧floor

102‧‧‧ accommodating space

103‧‧‧Border

103a‧‧‧ first side

103b‧‧‧Second side

1031‧‧‧ first edge

1032‧‧‧ second edge

104‧‧‧ openings

106‧‧‧Protruding

107‧‧‧Protruding

108‧‧‧ Groove

111‧‧‧First oxide layer

113‧‧‧Second oxide layer

121‧‧‧First color layer

123‧‧‧Second color layer

131‧‧‧First hydrated oxide layer

133‧‧‧Second hydrate oxide layer

20‧‧‧ display

100‧‧‧Electronic devices

301‧‧‧First cutting tool

303‧‧‧Second cutting tool

305‧‧‧ Third cutting tool

1 is a schematic structural view of a housing applied to an electronic device according to a preferred embodiment of the present invention.

2 is a schematic structural view of the housing shown in FIG. 1.

Figure 3 is an enlarged view of the portion III of the housing shown in Figure 2.

Figure 4 is a cross-sectional view of the frame in the housing of Figure 2.

Fig. 5 is a schematic view showing the first cutting process of the frame of the casing shown in Fig. 2.

Fig. 6 is a schematic view showing the first surface treatment of the frame of the casing shown in Fig. 5.

Fig. 7 is a schematic view showing the second cutting process of the frame of the casing shown in Fig. 6.

Fig. 8 is a schematic view showing the third cutting process of the frame of the casing shown in Fig. 7.

Fig. 9 is a schematic view showing the second surface treatment of the frame of the casing shown in Fig. 8.

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below can be combined with each other without conflict.

Referring to Figure 1, the present invention provides an electronic device 100 in accordance with a preferred embodiment. The electronic device 100 can be a mobile phone, a tablet computer, or the like. The electronic device 100 includes at least a housing 10 and a display screen 20.

Referring to FIG. 2 and FIG. 3 together, the housing 10 includes at least a frame 103. The frame 103 is made of a metal material and has a ring structure. The frame 103 includes two parallel first side edges 103a and two parallel second side edges 103b connected to each other to form the annular structure. The two parallel first side edges 103a are longer than the two parallel second side edges 103b. The frame 103 further includes a first edge 1031 and a second edge 1032 respectively located on both side edges of the annular structure. The first edge 1031 is opposite to the second edge 1032 and disposed parallel to each other. The frame 103 is used to accommodate the display screen 20, and the second edge 1032 is disposed adjacent to the display screen 20.

It can be understood that the housing 10 further includes a bottom plate 101. The first edge 1031 of the bezel 103 is connected to the bottom plate 101 to form a housing 10 having an accommodation space 102. The accommodating space 102 has an opening 104 defined by the second edge 1032. The display screen 20 is disposed on the opening 104. Preferably, the display screen 20 is affixed to a glass substrate (not shown) having substantially the same size as the opening 104, and is fixed to the opening 104 via the glass substrate (not shown). . The accommodating space 102 is used for accommodating the circuit board, the battery, and various electronic components, such as a camera, a button, a microphone, or a speaker, in addition to partially accommodating the display screen 20. In an embodiment, the bottom plate 101 and the frame 103 may be integrally formed. For example, the bottom plate 101 and the frame 103 can be formed by providing a metal substrate and machining the metal substrate to form the accommodating space 102 having the opening 104.

In the embodiment, the frame 103 further includes a protrusion 107. The protrusion 107 is disposed on an outer surface of the frame 103. Specifically, the frame 103 is subjected to a cutting process to form two inclined surfaces. The two inclined surfaces intersect at a substantially intermediate position of the bezel 103 to form a protrusion 107, and preferably form an included angle of more than 100°. The protrusion 107 is disposed around the bezel 103. The protrusion 107 may extend around the frame 103 in a continuous manner without interruption, or may extend around the frame 103 in a discontinuous manner, for example, when the side of the frame 103 is The protrusion is provided when there is a connector opening on the side (such as a USB connector opening) 107 will have a discontinuity point due to the opening of the connector. The protrusion 107 extends between the first edge 1031 and the second edge 1032 for improving the grip sensitivity of the housing 10 and improving the anti-slip capability of the housing 10. In other embodiments, the protrusions 107 may be extended and disposed around the frame 103, or may extend only on the two parallel first side edges 103a of the frame 103.

In the embodiment, the frame 103 is further provided with a groove 108 for further improving the anti-slip capability of the casing 10. The groove 108 is formed on an outer surface of the frame 103. The groove 108 surrounds the frame 103 and is located between the protrusion 107 and the second edge 1032. The groove 108 extends along the annular direction of the bezel 103. The groove 108 may extend around the protrusion 107 and the second edge 1032 continuously without interruption, or may extend around the protrusion in a discontinuous manner. 107 is between the second edge 1032 and the second edge 1032. Preferably, in the present embodiment, the groove 108 may extend continuously between the protrusion 107 and the second edge 1032 in a continuous uninterrupted manner, and the protrusion 107 and the groove 108 are substantially Parallel settings. The groove 108 is disposed adjacent the second edge 1032, and the distance between the groove 108 and the second edge 1032 is less than 2 mm. The groove 108 is formed with two side surfaces and has a substantially V-shaped cross section. Preferably, the width of the groove 108 is less than 1 mm, and the angle formed by the two side surfaces may be between 70 and 100 degrees, preferably between 80 and 90 degrees.

Referring to FIG. 4 , in the embodiment, in order to improve the appearance decoration function of the housing 10 , the first oxide layer 111 , the first color layer 121 , and the second oxide layer are further formed on the housing 10 . 113 and a second color layer 123.

Specifically, the first oxide layer 111 is formed on the outer surface of the frame 103 between the first edge 1031 and the groove 108 by anodization, that is, the first oxide layer 111 is at least The protrusion 107 in the bezel 103 is completely covered. In this embodiment, the first oxide layer 111 has a thickness of 10-15 um. A plurality of micropores are formed on the first oxide layer 111. Treated by dye The first oxide layer 111 is such that the dye is adsorbed in the plurality of micropores of the first oxide layer 111 to form a first color layer 121 on the surface of the first oxide layer 111.

Further, in other embodiments, in order to better adhere the first color layer 121 to the first oxide layer 111, the first color layer 121 may be sealed, thereby A first hydrated oxide layer 131 is formed on the first color layer 121. The first hydrated oxide layer 131 has a thickness of 10-15 um.

The second oxide layer 113 is formed on the outer surface of the frame 103 between the groove 108 itself and the groove 108 and the second edge 1032 by anodization, that is, the second The oxide layer 113 at least completely covers the groove 108 itself and the outer surface of the bezel 103 between the groove 108 and the second edge 1032. In this embodiment, the second oxide layer 113 has a thickness of 10-15 um. The second oxide layer 113 is formed with a plurality of micropores. Treating the second oxide layer 113 by another coloring agent such that the other coloring agent is adsorbed in the plurality of micropores of the second oxide layer 113, thereby forming a second layer on the second oxide layer 113. Color layer 123.

Further, in other embodiments, in order to better adhere the second color layer 123 to the second oxide layer 113, the second color layer 123 may be sealed, thereby A second hydrated oxide layer 133 is formed on the second color layer 123. The second hydrated oxide layer 133 has a thickness of 10-15 um.

It can be understood that, in this embodiment, the colors of the first color layer 121 and the second color layer 123 are different from each other. Preferably, the color of the second color layer 123 is the same as or similar to the color of the non-display area around the display screen 20, and is preferably black. In other embodiments, when the display screen 20 is a display screen with a narrow bezel, the color of the second color layer 123 is the same as or similar to the color of the display area around the display screen 20 in the dark screen, and the black color is the most good. As such, the user can visually cause the user to view the bezel 103 between the recess 108 and the second edge 1032 as part of the display screen 20, thereby causing the overall thickness of the electronic device 100 to produce a thinned vision. Effect (see Figure 1).

The invention provides a preparation method of the casing, comprising the following steps:

A substrate to be treated is provided. The material of the substrate is aluminum, aluminum alloy or other metal materials.

The substrate is cleaned.

Specifically, in the present embodiment, the substrate is ultrasonically cleaned with anhydrous ethanol to remove oil stains on the surface of the substrate. The ultrasonic cleaning time is 25-35 minutes.

The cleaned substrate is machined to form a housing 10. The housing 10 includes at least a bezel 103. The frame 103 is a ring structure. The bezel 103 includes a first edge 1031 and a second edge 1032. The first edge 1031 is opposite to the second edge 1032 and disposed parallel to each other. The frame 103 is used to accommodate the display screen 20, and the second edge 1032 is disposed adjacent to the display screen 20.

In other embodiments, the cleaned substrate may also be machined to form an accommodating space 102 to provide the housing 10. The accommodating space 102 has an opening 104 and has a bottom wall and a peripheral wall. The bottom wall of the accommodating space 102 constitutes the bottom plate 101 of the casing 10. The peripheral wall of the accommodating space 102 constitutes a frame 103 of the casing 10. The first edge 1031 of the bezel 103 is connected to the bottom plate 101 to form a housing 10 having the receiving space 102. The opening 104 is defined by the second edge 1032 to define the display screen 20. In the embodiment, the bottom plate 101 and the frame 103 of the housing 10 are integrally formed.

It can be understood that, in the present embodiment, for convenience of description, in FIGS. 5 to 9, only a part of the frame 103 is illustrated as an example.

Referring to FIG. 5, the housing 10 is subjected to a first cutting process by the first cutting tool 301 to form a protrusion 107 on the outer surface of the frame 103.

Specifically, the outer surface of the bezel 103 is subjected to a cutting process by the first cutting tool 301 to form two inclined surfaces. The two inclined surfaces are substantially the same as the frame 103 The intermediate positions intersect to form the protrusions 107. The protrusion 107 is disposed around the frame 103. The protrusion 107 extends between the first edge 1031 and the second edge 1032 for improving the grip resistance of the housing 10 and improving the anti-slip capability of the housing 10. In other embodiments, the protrusions 107 may be disposed only on the two symmetrical first side edges 103a of the bezel 103, which may also achieve the anti-slip capability.

Referring to FIG. 6, the casing 10 subjected to the first cutting process is subjected to a first anodizing treatment to form a first oxide layer 111 on the outer surface of the casing 10.

Specifically, the first anodizing treatment is: using the casing 10 as an anode, selecting stainless steel as a cathode, and applying a voltage of 10-15 V between the anode and the cathode. The sulfuric acid having a concentration of 160-220 g/L is used as the electrolyte, and the casing 10 is reacted in an electrolyte at a temperature of 16 to 18 ° C for 30 to 45 minutes. During the first anodizing treatment, H ₂ O molecules are ionized to form H ⁺ and OH ⁻ . H ⁺ is reduced near the cathode to form H ₂ . When OH ^- moves to the vicinity of the anode, H ₂ O molecules and O _{2 are} generated. O ₂ reacts with the casing 10 to form a first oxide layer 111 on the surface of the casing 10. The first oxide layer 111 has a thickness of 10-15 um. The surface of the first oxide layer 111 is formed with a plurality of micropores.

The first anodized shell 10 is subjected to a first dyeing treatment to form a first color layer 121 on the surface of the first oxide layer 111.

Specifically, the first dyeing process is: immersing the first anodized shell 10 in a dye having a temperature of 30-50 ° C for 1-2 min. In the dyeing process, the dye is adsorbed to the plurality of micropores of the first oxide layer 111 by diffusion, so that the casing 10 has the first color layer 121.

Further, in other embodiments, the first color layer 121 is better attached to the first oxide layer 111. The casing 10 subjected to the first dyeing treatment may be subjected to a first sealing treatment to fix the dye to the plurality of micropores of the first oxide layer 111.

In this embodiment, the first sealing treatment is sealed with boiling water. Specifically, the casing 10 subjected to the first dyeing treatment is placed in a boiling water tank for 30-45 minutes. The boiling water tank is filled with water at 95-100 °C. After the boiling water sealing treatment, a transparent first hydrated oxide layer 131 is formed on the surface of the first oxide layer 111. The first hydrated oxide layer 131 has a thickness of 10-15 um.

Of course, in other embodiments, the sealing treatment may also adopt steam sealing, nickel acetate sealing, potassium dichromate sealing, nickel sulfate sealing, nickel acetate sealing, stearic acid sealing or cold sealing. hole.

Referring to FIG. 7 , the first cutting process of the housing 10 subjected to the first sealing process is performed by the second cutting tool 303 to form a protruding portion 106 on the outer surface of the frame 103 .

Specifically, first, a second cutting process is performed on the outer surface of the frame 103 adjacent to the second edge 1032 to remove the first oxide layer 111, the first color layer 121, and the first hydrated oxidation on the outer surface. Layer 131 is cut and formed into a projection 106. The protrusion 106 is formed around the frame 103 after the second cutting.

Referring to FIG. 8, the third cutting tool 305 is used to perform a third cutting process on the lower surface of the protruding portion 106 near the protrusion 107 to form the groove 108 by cutting.

Specifically, the groove 108 surrounds the frame 103 and is located between the protrusion 107 and the second edge 1032. The groove 108 extends in an annular direction of the outer surface of the bezel 103. In the present embodiment, the protrusions 107 on the bezel 103 are disposed substantially parallel to the grooves 108. Preferably, the groove 108 is disposed adjacent to the second edge 1032, and the distance between the groove 108 and the second edge 1032 is less than 2 mm. The groove 108 is formed with two side surfaces and has a substantially V-shaped cross section. Preferably, the width of the groove 108 is less than 1 mm, and the angle formed by the two side surfaces may be between 70 and 100 degrees, preferably between 80 and 90 degrees.

It can be understood that, in the present embodiment, the groove 108 is formed by performing a third cutting process on the basis of the second cutting process. Among them, the second cutting process is performed to ensure that the grooves 108 having the same shape are obtained in the third cutting process, thereby improving the yield of the product.

Referring to FIG. 9, a third anodization process is performed on the casing 10 subjected to the third cutting process to expose the outer surface of the frame 103 of the substrate (that is, the protrusion 106 and the A second oxide layer 113 is formed on the surface of the recess 108.

Specifically, the second anodization is such that the casing 10 subjected to the third cutting treatment is used as an anode, stainless steel is used as a cathode, and a voltage of 8-13 V is applied between the anode and the cathode. The sulfuric acid having a concentration of 160-220 g/L is used as the electrolyte, and the casing 10 is reacted in an electrolyte at a temperature of 16 to 18 ° C for 30 to 45 minutes. During the second anodizing treatment, H ₂ O molecules are ionized to form H ⁺ and OH ⁻ . H ⁺ is reduced near the cathode to form H ₂ . When OH ^- moves to the vicinity of the anode, H ₂ O molecules and O ₂ , O ₂ and a region where the casing 10 is not covered with the first oxide layer 111 (ie, the protrusions 106 and the The region of the groove 108 reacts to form the second oxide layer 113 in a region not covered with the first oxide layer 111. The second oxide layer 113 has a thickness of 10-15 um. The surface of the second oxide layer 113 is formed with a plurality of micropores.

It can be understood that, in other embodiments, an ink protection layer may be coated on the surface of the first hydrated oxide layer 131 such that the first oxide layer 111 and the first hydrated oxide layer 131 are not subjected to the second anodization treatment. breakdown.

Of course, in still other embodiments, the second ablation treatment of the casing 10 subjected to the third cutting treatment may be performed at a lower voltage than when the first anodization is performed. As such, the first oxide layer 111 and the first hydrated oxide layer 131 can be prevented from being broken down during the second anodizing treatment.

The casing 10 subjected to the second anodizing treatment is subjected to a second dyeing treatment to form a second color layer 123 on the second oxide layer 113.

Specifically, the second dyeing process is: immersing the shell 10 subjected to the second anodizing treatment in another dye having a temperature of 30 to 50 ° C for 50 to 70 seconds. In the dyeing process, another dye is adsorbed to the plurality of micropores of the second oxide layer 113 by diffusion, so that the dye The outlet portion 106 and the recess 108 have a second color layer 123, thereby obtaining a housing 10 having a variety of colors. Since the surface of the first oxide layer 111 is covered with the first hydrated oxide layer 131, the second dyeing process has less influence on the color of the first dyeing process.

Further, in other embodiments, the second color layer 123 is better attached to the second oxide layer 113. The housing 10 subjected to the second dyeing treatment may be subjected to a second sealing treatment to fix the other coloring agent in the plurality of micropores of the second oxide layer 113.

In this embodiment, the second sealing treatment is sealed with boiling water. Specifically, the dyed treated casing 10 is placed in a boiling water tank for 30-45 minutes. The boiling water tank is filled with water at 95-100 °C. After the boiling water sealing treatment, a transparent second hydrated oxide layer 133 is formed on the surface of the second oxide layer 113. After the boiling water sealing treatment, a transparent second hydrated oxide layer 133 is formed on the surface of the second oxide layer 113. The second hydrated oxide layer 133 may have a thickness of 10 to 15 μm. Since the second hydrated oxide layer 133 is a transparent layer, the second color layer 123 is not covered by the second hydrated oxide layer 133. The first color layer 121 is connected to the second color layer 123 at the edge of the groove 108, so that the color of the frame 103 of the casing 10 exhibits a gradation effect.

Of course, in other embodiments, the sealing treatment may also adopt steam sealing, nickel acetate sealing, potassium dichromate sealing, nickel sulfate sealing, nickel acetate sealing, stearic acid sealing or cold sealing. hole.

It can be understood that, in this embodiment, the colors of the first color layer 121 and the second color layer 123 are different from each other. Preferably, the color of the second color layer 123 is the same as or similar to the color of the non-display area around the display screen 20, and is preferably black. In other embodiments, when the display screen 20 is a display screen with a narrow bezel, the color of the second color layer 123 is the same as or similar to the color of the display area around the display screen 20 in the dark screen, and the black color is the most good.

It can be understood that the surface treatment method of the casing 10 may further include performing a fourth cutting process, a third anodizing process, and a third dyeing on the casing after the second sealing process. The process is performed to obtain a casing 10 in which a combination of light and dark, multi-color and diversification is obtained.

In summary, the outer surface of the frame 103 of the casing 10 is provided with a protrusion 107. The arrangement of the protrusions 107 can effectively improve the grip sensitivity of the housing 10 and the anti-slip capability of the housing 10. In addition, a side of the frame 103 adjacent to the display screen 20 is further provided with a groove 108, and the color of the groove 108 to the frame portion of the second edge 1032 is substantially the same as the color around the display screen 20, thereby The overall thickness of the electronic device 100 is caused to produce a thinned visual effect (see FIG. 1), and at the same time, the anti-slip capability is improved by the arrangement of the grooves 108.

The above embodiments are only intended to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. Without departing from the spirit and essence of the technical solutions of the present invention.

Claims (13)

A housing comprising at least a bezel, wherein the frame is annular, the frame includes a first edge and a second edge, the frame is for receiving a display screen, and the frame is a protrusion is disposed on the outer surface, the protrusion is located between the first edge and the second edge, the frame includes two inclined surfaces, and the two inclined surfaces intersect to form the protrusion And a groove is further formed on the outer surface of the frame, the groove is located between the protrusion and the second edge, and extends along an annular direction of the frame. The casing of claim 1, wherein the groove surrounds the frame. The housing of claim 2, wherein the protrusion surrounds the frame and the protrusion is substantially parallel to the groove. The casing of claim 1, wherein the frame is made of a metal material, and a distance between the groove and the second edge is less than 2 mm. The casing of claim 1, wherein a portion of the outer surface of the bezel between the groove and the first edge is formed with a first color layer, the groove itself and the A portion of the outer surface of the bezel between the groove and the second edge is formed with a second color layer that is the same or similar in color to the surrounding area of the display screen. The casing of claim 5, wherein the second color layer is black. The casing of claim 1, wherein the groove is formed with two side surfaces and has a V-shaped cross section, and the two side surfaces of the groove form an angle of 70° with 100°. The casing of claim 1, wherein the casing further comprises a bottom plate connected to the first edge of the frame to form a casing having an accommodation space, the capacity The space has an opening. A manufacturing method of a casing, comprising the steps of: providing a substrate to be processed; machining the substrate to form a casing, the casing comprising at least a frame, the frame being annular The frame includes a first edge and a second edge, the frame is configured to receive a display screen, and the housing is subjected to a first cutting process to form a protrusion on the outer surface of the frame. The protrusion is located between the first edge and the second edge; performing a first anodizing treatment on the shell subjected to the first cutting process to form a first oxidation on an outer surface of the casing a layer; performing a first dyeing treatment on the first anodized shell to form a first color layer on the first oxide layer; and performing a second surface on an outer surface adjacent to the second edge a secondary cutting process for cutting the first oxide layer and the first color layer on the outer surface and cutting to form a protrusion; performing a third cutting process on a portion of the surface of the protrusion near the protrusion To form a groove, the groove bit Between the protrusion and the second edge, extending along an annular direction of the frame; performing a second anodizing treatment on the casing subjected to the third cutting process to the convex The second portion and the recess form a second oxide layer; and the second anodized shell is subjected to a second dyeing treatment to form a second color layer on the second oxide layer. The method of manufacturing a casing according to claim 9, wherein the material of the substrate is a metal material, and a distance between the groove and the second edge is less than 2 mm. The manufacturing method of the casing of claim 9, wherein the groove surrounds the frame, and the protrusion surrounds the frame and is disposed in parallel with the groove. The manufacturing method of the casing of claim 9, wherein the groove is formed with two side surfaces and has a V-shaped cross section, and the two side surfaces of the groove form an angle boundary Between 70° and 100°. An electronic device comprising at least a display screen and a housing according to any one of claims 1 to 8, wherein the display screen is disposed on the housing.