CN107835606B

CN107835606B - Shell manufacturing method, shell and mobile terminal

Info

Publication number: CN107835606B
Application number: CN201711076030.0A
Authority: CN
Inventors: 唐义梅; 孙毅; 陈仕权; 王聪; 周新权; 谷一平
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2017-11-03
Filing date: 2017-11-03
Publication date: 2021-01-12
Anticipated expiration: 2037-11-03
Also published as: CN107835606A

Abstract

The application discloses a shell manufacturing method, which comprises the following steps: processing at least one antenna seam on the shell base piece, wherein the at least one antenna seam divides the shell base piece into at least two metal parts; filling non-signal shielding materials in at least one antenna seam to form at least one insulating part, wherein the insulating part is connected between two adjacent metal parts; processing at least one groove on the insulating part; filling metal materials in the at least one groove to form at least one metal frame strip; and performing surface treatment on the at least one metal frame strip and the at least two metal parts to form the shell. The shell manufacturing method has the effect of an all-metal shell under the visual sense of naked eyes. The application also discloses a shell and a mobile terminal.

Description

Shell manufacturing method, shell and mobile terminal

Technical Field

The application relates to the technical field of electronic equipment, in particular to a shell manufacturing method, a shell and a mobile terminal.

Background

Nowadays, in the mobile terminal market, all-metal housings are increasingly favored by consumers. However, although the mobile terminal with an all-metal housing is beautiful, for many mobile terminals with antennas that need to receive or transmit radio frequency signals, the shielding effect of the all-metal housing on the radio frequency signals becomes an obstacle to the application of the all-metal housing as a housing.

In the existing design, mobile terminal manufacturers make a lot of optimization improvements to the defect, and a common improvement method is to machine a gap penetrating through a metal housing on the back of a metal mobile phone by a numerical control machine, and inject non-shielding materials such as plastic into the gap by injection molding to form a clearance area for radio frequency signals to pass through. However, the above design also results in that the mobile terminal cannot adopt the design of the all-metal housing, which affects the overall appearance and aesthetic feeling of the electronic product.

Disclosure of Invention

The application provides a shell manufacturing method with an all-metal shell effect under the visual sense of naked eyes, a shell and a mobile terminal.

The embodiment of the application adopts the following technical scheme:

in one aspect, a method for manufacturing a housing is provided, where the method includes:

processing at least one antenna seam on a shell base piece, wherein the at least one antenna seam divides the shell base piece into at least two metal parts;

filling a non-signal shielding material in the at least one antenna seam to form at least one insulating part, wherein the insulating part is connected between two adjacent metal parts;

processing at least one groove on the insulating part;

filling a metal material in the at least one groove to form at least one metal frame strip; and

and carrying out surface treatment on the at least one metal frame strip and the at least two metal parts to form the shell.

On the other hand, the shell comprises at least two metal parts and at least one insulating part, wherein the insulating part is connected between the two adjacent metal parts, at least one metal frame strip is embedded in the insulating part, and the shell is manufactured by the shell manufacturing method.

In another aspect, a mobile terminal is also provided, which includes the above housing.

In the embodiment of the application, in the shell manufacturing method, the straight line seam is milled through the T-shaped cutter, the arc seam is milled through the end cutter, the antenna seam can be completely milled, and the T-shaped cutter can machine the straight line seam in place through one-time machining, so that the time for machining the antenna seam is shortened in a large proportion, and the machining efficiency of the antenna seam is high.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;

FIG. 2 is a block flow diagram of a method for manufacturing a housing according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram corresponding to step 01 in a housing manufacturing method provided in an embodiment of the present application;

FIG. 4 is a schematic view of the structure of FIG. 3 taken along line A-A;

fig. 5 is a schematic structural diagram corresponding to step 02 in a housing manufacturing method provided in an embodiment of the present application;

FIG. 6 is a schematic view of the structure of FIG. 5 taken along line B-B;

fig. 7 is a schematic structural diagram corresponding to step 03 in a housing manufacturing method provided in an embodiment of the present application;

FIG. 8 is a schematic view of the structure of FIG. 7 taken along line C-C;

fig. 9 is a schematic structural diagram corresponding to step 04 in a housing manufacturing method provided in an embodiment of the present application;

FIG. 10 is a schematic view of the structure of FIG. 9 taken along line D-D;

fig. 11 is a schematic structural diagram corresponding to step 05 in a housing manufacturing method provided in an embodiment of the present application;

FIG. 12 is a schematic view of the structure of FIG. 11 taken along line E-E;

fig. 13 is a schematic structural diagram corresponding to step 06 in the method for manufacturing a housing according to the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be 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 of 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.

In addition, the following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be used to practice the present application. Directional phrases used in this application, such as, for example, "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the appended drawings and are, therefore, used herein for better and clearer illustration and understanding of the application and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the application.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed at … …" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified. In the present specification, the term "step" is used to mean not only an independent step but also an independent step unless clearly distinguished from other steps, as long as the intended function of the step is achieved. In the present specification, the numerical range represented by "to" means a range including numerical values before and after "to" as a minimum value and a maximum value, respectively. In the drawings, elements having similar or identical structures are denoted by the same reference numerals.

Referring to fig. 1, a method for manufacturing a housing is provided in the present application. The housing fabricating method is used to fabricate the housing 100. The case 100 may be applied to the mobile terminal 200. The mobile terminal 200 according to the embodiment of the present application may be any device having communication and storage functions, for example: the system comprises intelligent equipment with a network function, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, vehicle-mounted equipment, a network television, wearable equipment and the like.

Referring to fig. 2 to 4, the method for manufacturing the housing includes the steps of:

01: a housing base member 10 is provided.

Wherein the process of making the housing base member 10 comprises the steps of:

011: providing a metal base member 1, wherein the metal base member 1 is provided with an outer surface 11 and an inner surface 12 which are oppositely arranged, and the inner surface 12 of the metal base member 1 encloses an inner cavity 13. The metal substrate 1 is formed by cutting, extruding, forging and milling. The inner cavity 13 is used for forming an accommodating cavity of the shell 100, so that the shell 100 can accommodate electronic components after being molded.

012: the insulating element 2 is shaped in the interior 13 to form the housing base element 10. The insulator 2 may be molded by a nano injection molding process such that the insulator 2 is integrally formed with the metal base member 1.

With continued reference to fig. 2, 5 and 6, the method for manufacturing the housing further includes the steps of:

02: at least one antenna slot 30 is formed in the housing base piece 10. The at least one antenna seam 30 separates the housing base member 10 into at least two metal portions 14. For example, the number of the antenna slits 30 may be two, and the two spaced antenna slits 30 divide the housing base member 10 into three metal portions 14 spaced apart from each other.

Wherein the at least one antenna slot 30 is milled by a milling cutter at a predetermined position on the outer surface 11 of the metal base member 1 of the housing base member 10. The single antenna seam 30 may include a straight seam and an arc seam connected at both ends of the straight seam. When the straight seam is milled, a T-cutter (T-cutter) can be used for milling to increase the milling speed. And when the arc seam is milled, end cutters are used for milling, so that the cutter can conveniently process along an arc path, and the arc seam and the straight seam can be conveniently and smoothly butted during processing. After the arc seam and the straight seam are milled, the antenna seam 30 can be finished through an end cutter, so that the processing quality of the antenna seam 30 is improved.

Wherein, when the at least one antenna seam 30 is processed on the shell base material 10, the processing depth of the cutter is more than or equal to the thickness of the metal base material 1 and less than or equal to the sum of the thickness of the metal base material 1 and the thickness of the insulating member 2. The thickness of the metal base member 1 refers to the distance between the outer surface 11 and the inner surface 12 of the metal base member 1. The thickness of the insulating member 2 refers to the dimension of the insulating member 2 in the direction perpendicular to the outer surface 11 of the metal base member 1.

In this embodiment, the manufacturing method of the housing can completely remove the metal material at the predetermined position by strictly controlling the processing depth of the cutting tool, so as to form the complete antenna seam 30, and can avoid cutting off the insulating member 2, so that after the at least one antenna seam 30 is processed on the housing base member 10, the insulating member 2 can seal the opening of the at least one antenna seam 30 in the inner cavity 13, so as to facilitate the subsequent dispensing action. And, when the depth of the tool is greater than the thickness of the metal base member 1, the wall surface of the antenna seam 30 is formed on both the metal base member 1 and the insulating member 2, so that the area of the wall surface of the antenna seam 30 is large, and the bonding strength between the member filled in the antenna seam 30 and the housing base member 10 is large.

With reference to fig. 2, 5 to 8, the method for manufacturing the housing further includes:

03: the at least one antenna seam 30 is filled with a non-signal shielding material to form at least one insulation 3. The insulating portion 3 is connected between two adjacent metal portions 14.

In this embodiment, since the insulating member 2 blocks the opening of the at least one antenna seam 30 in the inner cavity 13, the non-signal shielding material can be prevented from pouring into the inner cavity 13. The non-signal shielding material is formed in the at least one antenna seam 30 after being filled for multiple times, so that a good bonding effect between the at least one insulating part 3 and the adjacent metal part 14 is ensured. And when the wall surface area of the antenna seam 30 is large, the area of the joint surface between the metal part 14 and the insulating part 3 is large, so that the strength of the joint between the metal part 14 and the insulating part 3 is further improved, the insulating part 3 is less prone to deformation or falling off, and the housing 100 and the mobile terminal 200 are more reliable.

Wherein the non-signal shielding material may be filled to the at least one antenna seam 30 in a molten state and then solidified through a cooling solidification process to form the at least one insulating part 3. The non-signal shielding material is plastic.

After the non-signal shielding material is cured, the non-signal shielding material overflowing the antenna seam 30 can be removed, so as to improve the processing quality of the insulating part 3. In this embodiment, in order to completely fill the antenna seam 30 with the non-signal shielding material, the filling amount of the non-signal shielding material is larger than the capacity of the antenna seam 30. I.e. the non-trusted shielding material present portion overflows the antenna seam 30. The non-signal shielding material overflowing the antenna seam 30 is removed so that the outer surface 31 of the insulating portion 3 is flush with the outer surface 11 of the metal base member 1, thereby obtaining a case 100 with high appearance quality. Specifically, the non-signal shielding material overflowing the antenna seam 30 may be removed by grinding or milling.

Referring to fig. 2, fig. 9 and fig. 10, the method for manufacturing the housing further includes the steps of:

04: at least one groove 32 is machined in the insulating part 3. When the number of the grooves 32 is plural, plural grooves 32 are provided at intervals from each other. The extension direction of the groove 32 is the same as the extension direction of the insulating part 3, i.e. the extension direction of the corresponding antenna slot 30.

Wherein the insulating part 3 has an outer surface 31, and the outer surface 31 of the insulating part 3 is flush with the outer surface 11 of the metal base member 1. The opening of the groove 32 is formed on the outer surface 31 of the insulating part 3. The groove 32 is recessed from the outer surface 31 of the insulating portion 3 toward the inside of the insulating portion 3. Wherein, in a direction perpendicular to the extending direction of the antenna seam 30, the width of the opening of a single groove 32 is greater than or equal to the distance between two adjacent grooves 32. The distance between two adjacent grooves 32 is less than 0.5 mm.

Wherein, when the at least one groove 32 is machined on the insulating part 3, the ratio of the machining depth of the cutter to the thickness of the insulating part 3 is in the range of 0.2 to 0.6. The thickness of the insulating portion 3 is a dimension of the insulating portion 3 in a direction perpendicular to the outer surface 11 of the metal base member 1. At this time, the groove 32 has a sufficient depth to make the area of the groove wall 320 of the groove 32 large, so that the insulating part 3 can be tightly and firmly combined with the component which is subsequently filled in the groove 32. Meanwhile, the groove 32 does not cut off the insulating part 3, so that the insulating part 3 is prevented from being broken in the use process of the housing 100 and the mobile terminal 200, and the housing 100 and the mobile terminal 200 have high reliability.

Wherein the at least one groove 32 is machined with a conical milling cutter on a numerically controlled machine tool. The diameter of the conical milling cutter is gradually reduced in the direction from the cutter body to the cutter head. At this time, the cross-sectional shape of the groove 32 is trapezoidal in a direction perpendicular to the extending direction of the groove 32 (see fig. 10). The long sides of the trapezoid are flush with the outer surface 31 of the insulating part 3. The area of the wall 320 of the trapezoidal groove 32 is further increased, and the bonding strength between the insulating part 3 and the subsequent part filled in the groove 32 is stronger.

Wherein, after the at least one groove 32 is machined, the groove wall 320 of the groove 32 is ground and/or polished to increase the surface roughness of the groove wall 320 of the groove 32. Since the groove wall 320 of the groove 32 has a large surface roughness, the bonding strength between the insulating part 3 and the member subsequently filled in the groove 32 can be improved.

Referring to fig. 2, fig. 9 to fig. 12, the method for manufacturing the housing further includes the steps of:

05: the at least one groove 32 is filled with a metal material to form at least one metal frame strip 4.

In this embodiment, since the metal frame strip 4 is filled in the groove 32, and the metal frame strip 4 is embedded in the insulating portion 3, the metal frame strip 4 shields a portion of the insulating portion 3, and an exposed area of the insulating portion 3 is smaller. Moreover, the metal frame strips 4 and the at least two metal parts 14 have a stronger consistency in appearance, so that the housing can visually form an all-metal housing effect. Meanwhile, the metal frame strip 4 is embedded in the insulating portion 3 and tightly combined with the insulating portion 3, so that the overall strength of a clearance area formed by the insulating portion 3 and the metal frame strip 4 can be improved, and the reliability of the housing 100 and the mobile terminal 200 is higher.

Wherein, the at least one groove 32 can be filled with the metal material by spraying or coating.

Since the groove wall 320 of the groove 32 has a large area and the surface roughness of the groove wall 320 of the groove 32 is large, the bonding strength between the metal frame strip 4 filled in the groove 32 and the insulating portion 3 is strong, the risk that the metal frame strip 4 is separated from the insulating portion 3 due to aging or external impact is small, and the reliability of the housing 100 and the mobile terminal 200 is high.

Referring to fig. 2 and 13, the method for manufacturing the housing further includes the steps of:

06: the at least one metal frame strip 4 and the at least two metal portions 14 are surface-treated to form the housing 100. By performing surface treatment on the at least one metal frame strip 4 and the at least two metal portions 14, the consistency of the appearance surfaces of the at least one metal frame strip 4 and the at least two metal portions 14 can be improved, so that the shell 100 has strong appearance consistency and a more obvious all-metal visual effect.

Wherein the surface treatment mode comprises the following steps: surface polishing, and/or sand blasting, and/or anodizing. The surface treatment employed in step 06 may be any one or combination of the above. As shown in fig. 13, the outer surface 141 of the metal portion 14 (i.e., the outer surface 11 of the metal base 1 in the previous step) is flush with the outer surface 41 of the metal frame strip 4. The outer surface of the metal part 14 and the outer surface of the metal frame strip 4 are simultaneously surface-treated. Wherein, the polishing and sand blasting treatment can improve the smoothness and the reflectivity of the surface, and make the surface have the performances of oil resistance, scratch resistance, dirt resistance and the like, thereby improving the touch feeling of users. The anodic oxidation can make the surface present the required color, and the appearance color of the at least one metal frame strip 4 is consistent or almost consistent with the appearance color of the at least two metal parts 14, so that the housing 100 can present various color requirements to meet the customer requirements.

In the embodiment of the application, in the manufacturing method of the shell, the metal frame strip 4 is embedded in the insulating part 3, so that the metal frame strip 4 shields part of the insulating part 3, and the exposed area of the insulating part 3 is small, so that the shell can form the effect of an all-metal shell visually by naked eyes. Meanwhile, the metal frame strip 4 is embedded into the insulating portion 3 and tightly combined with the insulating portion 3, so that the overall strength of a clearance area formed by the insulating portion 3 and the metal frame strip 4 can be improved, and the reliability of the housing 100 and the mobile terminal 200 is higher.

Referring to fig. 1 to 13, an embodiment of the invention further provides a housing 100, where the housing 100 includes at least two metal portions 14 and at least one insulating portion 3. The insulating portion 3 is connected between two adjacent metal portions 14. At least one metal frame strip 4 is embedded on the insulating part 3. The housing 100 is manufactured by the housing manufacturing method described in the above embodiments. The case 100 is applied to the mobile terminal 200. It is understood that the housing 100 is a back cover of the mobile terminal 200. The mobile terminal 200 may be any device with communication and storage functions, such as: the system comprises intelligent equipment with a network function, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, vehicle-mounted equipment, a network television, wearable equipment and the like.

Referring to fig. 1 to fig. 13, the present invention further provides a mobile terminal 200, where the mobile terminal 200 includes the housing 100. The mobile terminal 200 further includes a front cover 300 covering the housing 100, and the front cover 300 is formed of a glass plate and a display screen laminated on the glass plate. The front cover 300 covers the receiving cavity of the housing 100 to protect the electronic components fixed in the receiving cavity. The mobile terminal 200 may be any device with communication and storage functions, such as: the system comprises intelligent equipment with a network function, such as a tablet Computer, a mobile phone, an electronic reader, a remote controller, a Personal Computer (PC), a notebook Computer, vehicle-mounted equipment, a network television, wearable equipment and the like.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A shell manufacturing method is characterized by comprising the following steps:

providing a metal base part, wherein the metal base part is provided with an outer surface and an inner surface which are oppositely arranged, and the inner surface encloses an inner cavity; and

forming an insulator over the inner cavity, the insulator covering the entire cavity wall of the inner cavity opposite the outer surface to form a housing base member;

processing at least one antenna seam on a shell base piece, wherein the single antenna seam comprises a straight seam and arc seams connected to two ends of the straight seam; the depth of the at least one antenna seam is greater than or equal to the thickness of the metal base part and less than or equal to the sum of the thickness of the metal base part and the thickness of the insulating part, the insulating part can block the opening of the at least one antenna seam in the inner cavity, and the at least one antenna seam divides the shell base part into at least two metal parts;

the wall surface of the antenna seam is formed on the metal base part and the insulating part at the same time, so that the area of the wall surface of the antenna seam is increased, a non-signal shielding material is filled in at least one antenna seam to form at least one insulating part, the bonding strength between the insulating part and the shell base part is high, the insulating part is connected between two adjacent metal parts, and the insulating part is also connected on the metal base part and the insulating part at the same time;

processing at least one groove on the insulating part;

2. The method of manufacturing a case according to claim 1, wherein a ratio of a processing depth of a tool to a thickness of the insulating part when the at least one groove is processed on the insulating part is in a range of 0.2 to 0.6.

3. A method of manufacturing a housing according to claim 1, wherein the at least one recess is machined in a numerically controlled machine tool with a conical milling cutter, the diameter of which decreases in the direction of the blade towards the tool head.

4. The method of claim 1, wherein after machining the at least one groove, grinding and/or polishing the groove wall of the groove to increase the surface roughness of the groove wall of the groove.

5. The method for manufacturing a housing according to any one of claims 1 to 4, wherein the at least one groove is filled with a metal material by spraying or coating.

6. The method of manufacturing a housing according to claim 1, wherein the surface treatment comprises: surface polishing, and/or sand blasting, and/or anodizing.

7. A shell is characterized by comprising at least two metal parts and at least one insulating part, wherein the insulating part is connected between two adjacent metal parts, at least one metal frame strip is embedded in the insulating part, and the shell is manufactured by the shell manufacturing method according to any one of claims 1 to 6.

8. A mobile terminal, characterized in that it comprises a housing according to claim 7.