CN107896461A - Housing, manufacturing method thereof, and mobile terminal - Google Patents

Abstract

The present application provides a method for manufacturing a shell, comprising the following steps: providing a shell substrate; forming a substrate on the shell substrate, wherein the substrate and the shell substrate are stacked; processing the shell substrate and the substrate to form an antenna micro-slit, wherein the cross section of the substrate at the bottom of the antenna micro-slit is convex in the middle and concave on both sides; filling the antenna micro-slit with sealing glue; forming a sealing layer to seal the antenna micro-slit. The present application also provides a shell and a mobile terminal. The present application can improve the sealing quality of the shell in the mobile terminal.

Description

Housing, manufacturing method thereof, and mobile terminal

technical field

The present application relates to the technical field of mobile terminals, in particular to a casing, a manufacturing method thereof, and a mobile terminal having the casing.

Background technique

At present, micro-slits are often provided on the casing to install functional components or transmit optical signals and electrical signals. Based on this structure, in order to ensure the overall appearance and dustproof and waterproof performance of the shell, it is necessary to seal the micro-slit by filling medium. If the sealing process of the filling medium is poor, the sealing performance of the shell will be reduced.

Contents of the invention

The present application provides a casing, a manufacturing method thereof, and a mobile terminal having the casing, so as to improve the sealing quality of the casing in the mobile terminal.

The application provides a method for manufacturing a housing, comprising the following steps:

Provide the shell base;

forming a base on the housing base, the base and the housing base are laminated;

Processing the housing base and the base to form antenna micro-slits, the cross-section of the base at the bottom of the antenna micro-slits is convex in the middle and concave on both sides;

Filling sealing glue in the micro-slit of the antenna;

A sealing layer is formed to seal the micro-slits of the antenna.

The present application provides a casing, the casing includes a casing base and a base on which the casing base is laminated, an antenna micro-slit penetrating through the casing base and extending to the base, and filling in the antenna For the sealing layer in the micro-slit, the base has a top wall attached to the sealing layer, and the cross-section of the top wall is convex in the middle and concave on both sides.

The present application also provides a mobile terminal, including the casing.

The shell and its manufacturing method and mobile terminal provided by the present application process the antenna micro-slits on the base and the shell base that are stacked, and make the cross-section of the base at the bottom of the antenna micro-slits have a middle bulge and two sides. The shape of the side depression, after the sealing glue is filled in the antenna micro-slit, the sealing glue can be preferentially filled in the gap between the antenna micro-slit and the base, thereby reducing the amount of sealing glue after filling the antenna micro-slit. Then enter the gap to cause bubbles in the sealing layer, resulting in poor sealing quality of the sealing layer, thereby improving the molding quality and sealing quality of the sealing layer; in addition, the cross section of the base is convex in the middle and concave on both sides The shape can also increase the contact area between the sealing layer and the base, thereby increasing the bonding strength between the sealing layer and the base, thereby improving the sealing quality of the housing, and improving the Describe the reliability of the mobile terminal.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a mobile terminal provided by an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a casing provided by an embodiment of the present application.

Fig. 3 is a partially enlarged structural schematic diagram of a casing in the prior art.

Fig. 4 is a partially enlarged structural schematic diagram of a casing provided by an embodiment of the present application.

Fig. 5 is a partially enlarged structural schematic diagram of a casing provided by an embodiment of the present application.

Fig. 6 is a flow chart of a manufacturing method of a housing provided by an embodiment of the present application.

FIG. 7 is a schematic structural diagram of step 101 of the shell manufacturing method provided by the embodiment of the present application.

FIG. 8 is a schematic structural diagram of step 102 of the shell manufacturing method provided by the embodiment of the present application.

FIG. 9 is a schematic structural diagram of step 102 of the shell manufacturing method provided by the embodiment of the present application.

FIG. 10 is a schematic structural diagram of step 103 of the shell manufacturing method provided by the embodiment of the present application.

Fig. 11 is a schematic structural diagram of step 103a of the shell manufacturing method provided by the embodiment of the present application.

Fig. 12 is a schematic structural diagram of step 103b of the shell manufacturing method provided by the embodiment of the present application.

FIG. 13 is a schematic structural diagram of step 103b of the shell manufacturing method provided by the embodiment of the present application.

FIG. 14 is a schematic structural diagram of step 1032 of the shell manufacturing method provided by the embodiment of the present application.

FIG. 15 is a schematic structural diagram of step 104 of the shell manufacturing method provided by the embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In addition, the following descriptions of the various embodiments refer to the attached drawings to illustrate specific embodiments that the application can be used to implement. Directional terms mentioned in this application, for example, "top", "bottom", "upper", "lower", "front", "rear", "left", "right", "inner", "outer ", "side" and so on are only referring to the direction of the attached drawings, therefore, the direction terms used are for better and clearer description and understanding of the application, rather than indicating or implying that the device or element referred to must have Certain orientations, constructed and operative in certain orientations, therefore should not be construed as limitations on the present application.

The numerical range represented by "-" in this specification means the range which includes the numerical value described before and after "-" as a minimum value and a maximum value, respectively. In the drawings, those with similar or identical structures are denoted by the same reference numerals.

Please refer to FIG. 1. FIG. 1 is a mobile terminal 100 provided by the embodiment of the present application. The mobile terminal 100 can be any device with communication and storage functions, such as a tablet computer, mobile phone, e-reader, remote control, Intelligent devices with network functions such as personal computers (PersonalComputers, PCs), notebook computers, vehicle-mounted devices, Internet TVs, and wearable devices.

Referring to FIG. 1 , the mobile terminal 100 includes a housing 110 for encapsulating a functional device 130 . The functional device 130 includes an antenna. The housing 110 is made of metal, and the metal housing 110 has a shielding effect on electromagnetic waves radiated by the antenna, so that the built-in antenna of the mobile terminal 100 cannot receive and send electrical signals. In order to solve the electromagnetic wave shielding problem of the metal shell 110 of the mobile terminal 100, the antenna micro-slit 120 is processed on the metal shell 110, and then an insulating medium is filled into the antenna micro-slit 120 to seal the metal shell 110, so that the mobile The built-in antenna of the terminal 100 radiates signals through the antenna slit 120 . However, in the process of forming the antenna micro-slit 120 , the filling medium is poorly combined with the inner wall of the antenna micro-slit 120 , which may cause problems such as poor sealing or generation of air bubbles, thereby affecting the overall strength and waterproof performance of the casing 110 .

Please refer to FIG. 2 . FIG. 2 is a casing 110 provided by an embodiment of the present application, which can be used as a battery rear casing of the mobile terminal 100 . The housing 110 includes a housing base 111 and a base 112 laminated with the housing base 111, an antenna micro-slit 120 penetrating through the housing base 111 and extending to the base 112, and filling the antenna micro-slit. Sealing layer 113 in 120. The base 112 has a top wall 1121 attached to the sealing layer 113 . The section of the top wall 1121 is convex in the middle and concave on both sides.

In this embodiment, the sealing layer 113 is formed by filling the antenna micro-slit 120 with sealing glue and curing the sealing glue, thereby forming the sealing layer 113 .

In this embodiment, please refer to FIG. 3 , the housing base 111 is made of metal, and the base 112 is made of injection molded plastic. Due to the unstable combination of plastic and metal, there may be a gap 114 between the housing base 111 and the base 112. After the sealing glue fills the antenna micro-slit 120, the filling of the sealing glue will be stopped and cured. After the filling of the sealing glue is stopped, the sealing glue may enter between the housing base 111 and the base 112 In the gap 114 of the sealing layer 113, defects such as air bubbles are formed.

The antenna micro-slit 120 is processed on the substrate 112 and the housing base 111 that are stacked, and the cross-section of the substrate 112 at the bottom of the antenna micro-slit 120 is in the shape of a middle convex and concave on both sides. After filling the sealing glue in the micro-slit 120, the sealing glue can be preferentially filled in the gap 114 between the antenna micro-slit 120 and the base 112, thereby reducing the sealing glue entering the gap 114 after filling the antenna micro-slit 120 And cause bubbles etc. to be produced in the sealing layer 113, cause problems such as poor sealing quality of the sealing layer 113, thereby improve the forming quality and sealing quality of the sealing layer 113; The shape can also increase the contact area between the sealing layer 113 and the base 112, thereby increasing the bonding force between the sealing layer 113 and the base 112, thereby improving the strength of the housing 110. Seal quality, and improve the reliability of the mobile terminal 100.

In a possible embodiment, please refer to FIG. 4 and FIG. 5 , the base 112 includes a first groove 1122 and a second groove 1123 and a gap between the first groove 1122 and the second groove 1123 Protrusions 1124 are formed. The antenna microslit 120 includes a first side wall 1201 and a second side wall 1202 oppositely disposed. The first groove 1122 is smoothly connected with the first sidewall 1201 , and the second groove 1123 is smoothly connected with the second sidewall 1202 . Since the first groove 1122 is smoothly connected with the first side wall 1201, so that the gap 114 between the housing base 111 and the base 112 is exposed to the inner wall of the antenna micro-slit 120, when filling When the sealing glue is used, the sealing glue can easily enter the gap 114 , thereby reducing defects such as air bubbles in the sealing layer 113 and improving the sealing quality of the housing 110 .

Please refer to FIG. 6-FIG. 7. FIG. 6 is a manufacturing method 10 of a casing 110 provided by an embodiment of the present application. The manufacturing method of the casing includes the following steps.

Step 101 , providing a housing base 111 .

In this embodiment, please refer to FIG. 7 , the housing base 111 is first cut from the raw material of the housing 110 and stamped multiple times to form a sheet of the housing 110 with a uniform thickness, and then using a computer numerical control machine tool (Computernumericalcontrol, CNC) performs turning, milling, grinding, cutting, etc. on the sheet material of the shell 110 to form the shell base 111 . The housing base 111 is substantially in the shape of a rectangular plate. The casing base 111 has a first surface 1111 and a second surface 1112 opposite to the first surface 1111 . The first surface 1111 and the second surface 1112 can be flat surfaces or curved surfaces. Wherein, the first surface 1111 faces the functional device 130 inside the casing 110, and the second surface 1112 faces the external environment.

Step 102 , referring to FIG. 8 and FIG. 9 , forming a base 112 on the housing base 111 , and the base 112 and the housing base 111 are stacked.

In this embodiment, the base 112 is molded on the first surface 1111 of the housing base 111 . The base 112 is stacked with the casing base 111 . The base 112 is used to provide a supporting force when the antenna micro-slit 120 is cut on the housing base 111, so as to prevent the housing base 111 from being bent and deformed.

In one embodiment, the base 112 is formed by injection molding. The molding process of the base 112 includes the following steps.

Step 1021, providing a mold. Please refer to FIG. 8 , the mold includes an upper mold 151 and a lower mold 152 . The upper mold 151 and the lower mold 152 correspond to the second surface 1112 and the first surface 1111 respectively.

Step 1022, putting the housing base 111 into the mould. The first surface 1111 of the housing base 111 is disposed on the lower mold 152, the second surface 1112 faces the upper mold 151, and a space is reserved between the first surface 1111 and the lower mold 152. Smaller gap 153 .

Step 1023 , inject the raw material of the base 112 into the mould. The raw material of the base 112 is in a liquid state. The raw material of the base 112 is injected into the gap 153 between the first surface 1111 and the upper mold 151.

Step 1024 , please refer to FIG. 9 , forming the base 112 . The upper mold 151 and the lower mold 152 are pressed against each other, extruding the raw material of the base 112 to form the base 112 , and forming the base 112 on the first surface 1111 of the shell base 111 .

Step 103 , please refer to FIGS. 10-14 , process the casing base 111 and the base 112 to form antenna micro-slits 120 . The cross-section of the base 112 at the bottom of the antenna micro-slit 120 has a central protrusion 1124 and depressions on both sides.

In this embodiment, the housing base 111 is made of metal, which is used to prepare the battery back cover of the mobile terminal 100 . However, the metal shell 110 has a shielding effect on electromagnetic waves, so that the built-in antenna of the mobile terminal 100 cannot receive and send electrical signals. In order to solve the electromagnetic wave shielding problem of the metal shell 110 of the mobile terminal 100 , an antenna micro-slit 120 is formed on the metal shell 110 so that the built-in antenna of the mobile terminal 100 radiates signals through the antenna micro-slit 120 .

In this embodiment, referring to FIG. 10 , the housing base 111 is placed horizontally (please refer to the accompanying drawings) on a computer numerical control machine tool, and the antenna micro-slit 120 is cut on the housing base 111 with a CNC milling cutter 155 . The milling cutter cuts from the second surface 1112 toward the first surface 1111, and since the base 112 is attached to the first surface 1111, the milling cutter 155 can cut off the housing base 111, and then cut into The base 112 is configured to form an antenna micro-slit 120 penetrating through the casing base 111 and protruding into the base 112 . It can be understood that, in this embodiment, cutting the housing base 111 by the milling cutter 155 refers to cutting through the first surface 1111 toward the second surface 1112 , rather than cutting the housing base 111 into two separate parts. part. When cutting a plurality of antenna micro-slits 120 , the base 112 can be used to support the housing base 111 , and the base 112 keeps adjacent antenna micro-slits 120 from bending and deformation during the cutting process.

In this embodiment, after the antenna micro-slit 120 is formed, the bottom part of the antenna micro-slit 120 corresponding to the base 112 will be in the shape of a central protrusion 1124 and depressions on both sides.

In the first embodiment, please refer to FIG. 11-FIG. 13. During the process of processing the housing base 111 and the base 112, the antenna micro-slit 120 can be formed by cutting multiple times, which specifically includes the following steps .

Step 103 a , referring to FIG. 11 , cutting the shell base 111 with a milling cutter 156 to form initial micro-slits 121 . The initial micro-slit 121 runs through the shell base 111 . By setting the cutting program, after the shell base 111 is cut, the cutting of the shell base 111 is stopped, and the initial micro-slits 121 are formed on the shell base 111 . The initial micro-slit 121 only penetrates the shell base 111 , but does not penetrate the base 112 .

Step 103b , please refer to FIG. 12 and FIG. 13 , cut the substrate 112 through the initial micro-slit 121 . A first groove 1122 and a second groove 1123 are processed on the base 112 , and a protrusion 1124 is formed between the first groove 1122 and the second groove 1123 . In this step, the milling cutter 157 with a smaller cutter head size is replaced, the milling cutter passes through the initial micro-slit 121 to process the substrate 112, and cuts a first groove 1122 on the substrate 112, and then controls the The milling cutter processes a second groove 1123 on the other side of the base 112 , and a protrusion 1124 is formed between the first groove 1122 and the second groove 1123 .

In the second implementation manner, during the process of processing the housing base 111 and the base 112 , the antenna micro-slit 120 may be formed by cutting once, which specifically includes the following steps.

Step 1030, please refer to FIG. 14 , use a cutter to cut the housing base 111 and the base 112 to form a first groove 1122 and a second groove 1123 on the base 112 and a groove located in the first groove 1122. and the protrusion 1124 between the second groove 1123 .

In one implementation manner, step 1030 includes the following steps.

Step 1031 , providing a knife 158, which is a circular blade, and the section of the knife tip of the knife 158 is in the shape of convex sides and a concave middle.

Step 1032, place the cutter 158 perpendicular to the shell base 111, control the cutter 158 to rotate at a high speed and cut the shell base 111 and the base 112. The cutter 158 cuts off the shell base 111 first, and then cuts into the base 112 .

Step 1033, after the tip of the knife 158 cuts into the substrate 112, control the knife 158 to stop cutting. Since the tip section of the cutter 158 is convex on both sides and concave in the middle, the cutter 158 forms two grooves on the base 112 , that is, a first groove 1122 and a second groove 1123 .

In this embodiment, the cutting process of the antenna micro-slit 120 can be completed at one time by using a knife 158 with a knife-tip cross-section with protrusions 1124 on both sides and a depression in the middle, which simplifies the process and improves the production efficiency of the housing 110 .

In one embodiment, after the step 103 of processing the housing base 111 and the base 112 and forming the antenna micro-slit 120 , between the first groove 1122 and the inner wall on one side of the initial micro-slit 121 Smooth connection, smooth connection between the second groove 1123 and the inner wall on the other side of the initial micro-slit 121 .

Step 104 , filling the antenna micro-slit 120 with sealing glue.

In one embodiment, referring to Fig. 2, the step 104 of filling the sealing glue in the antenna micro-slit 120 includes:

Step 1041 , filling the first sealing glue in the antenna micro-slit 120 . The first sealing glue is filled in the first groove 1122 and the second groove 1123 .

Step 1042 , curing the first sealing glue to form the first sealing layer 1131 . The first sealing layer 1131 covers the base 112 .

In this embodiment, after the sealing glue is filled in the antenna micro-slit 120, the sealing glue can be preferentially filled in the gap 114 between the antenna micro-slit 120 and the base 112, thereby reducing the amount of sealing glue filling up. The antenna micro-slit 120 then enters the gap 114 to cause air bubbles in the sealing layer 113, resulting in poor sealing quality of the sealing layer 113, thereby improving the molding quality of the sealing layer 113, thereby improving the sealing quality of the housing 110 , and improve the reliability of the mobile terminal 100 .

In one embodiment, please refer to FIG. 15 , the step 104 of filling the first sealing glue in the antenna micro-slit 120 further includes:

Step 1043 , filling the second sealing glue on the first sealing layer 1131 .

Step 1044 , curing the second sealing glue, forming the second sealing layer 1132 to fill the antenna micro-slit 120 .

In this embodiment, after filling the first sealing glue in the antenna micro-slit 120, the first sealing glue is filled in the gap 114 between the antenna micro-slit 120 and the base 112, and the formed first The sealing layer 1131 can seal the gap 114 between the antenna micro-slit 120 and the substrate 112, and then fill the second sealing glue on the first sealing layer 1131 to form a second sealing layer 1132. The second sealing Layer 1132 fills the antenna microslit 120 . It can reduce the problem that the sealing glue enters the gap 114 after filling the antenna micro-slit 120 to cause air bubbles in the sealing layer 113, resulting in poor sealing quality of the sealing layer 113, thereby improving the molding quality of the sealing layer 113, and then improving the sealing layer 113. The sealing quality of the casing 110 is improved, and the reliability of the mobile terminal 100 is improved.

In this embodiment, the first sealing glue and the second sealing glue may be of the same or different material.

Optionally, the viscosity of the first sealing glue may be smaller than the viscosity of the second sealing glue. The first sealing glue has better fluidity, so that the first sealing glue can flow to the gap 114 between the housing base 111 and the base 112 after being filled in the antenna micro-slit 120 In order to reduce defects such as air bubbles, poor sealing and glue leakage in the sealing layer 113 .

In other implementation manners, after the second sealing layer 1132 is formed, the antenna micro-slit 120 may be filled up after filling the sealing glue and curing the sealing glue multiple times.

Optionally, the second sealing glue includes a colored material, and the colored material makes the second sealing glue appear white, gold, silver, etc. After the second sealing layer 1132 is formed, the second sealing Layer 1132 forms a colored encapsulation tape that can be used for marking and decoration.

Step 105 , forming the sealing layer 113 to seal the antenna micro-slit 120 .

Optionally, in step 105, the first sealing glue may be cured through a heat curing process or an ultraviolet light curing process. In the process of curing the first sealing glue through a heat curing process, the temperature of heat curing can be 80-100°C, and a lower temperature suitable for curing should be selected as far as possible to avoid excessive curing temperature. The glue cracks or shrinks and deforms or is separated from the inner sidewall of the antenna micro-slit 120 . Optional, so the heat curing time can be 0.5-2h.

Step 106, grinding the housing base 111, removing the overflowing sealing glue, so that the sealing layer 113 is flush with the surface of the housing base 111.

In summary, although the present application has disclosed the above with a preferred embodiment, the preferred embodiment is not intended to limit the present application, and those of ordinary skill in the art may, without departing from the spirit and scope of the present application, Various changes and modifications are made, so the scope of protection of the present application is subject to the scope defined by the claims.

Claims (10)

1. A shell manufacturing method, characterized in that, comprises the following steps: Provide the shell base; forming a base on the housing base, the base and the housing base are laminated; Processing the housing base and the base to form antenna micro-slits, the cross-section of the base at the bottom of the antenna micro-slits is convex in the middle and concave on both sides; Filling sealing glue in the micro-slit of the antenna; A sealing layer is formed to seal the micro-slits of the antenna. 2. The shell manufacturing method according to claim 1, wherein the step of processing the shell matrix and the base to form antenna micro-slits comprises: cutting the shell matrix to form initial micro-slits, the initial micro-slits running through the shell matrix; cutting the substrate through the initial micro-slits, forming a first groove and a second groove on the substrate, and forming a protrusion between the first groove and the second groove. 3. The shell manufacturing method according to claim 1, wherein the step of processing the shell base and the base to form antenna micro-slits comprises: A knife is used to cut the housing base and the base, forming a first groove and a second groove and a protrusion between the first groove and the second groove on the base. 4. The shell manufacturing method according to claim 3, wherein the step of cutting the shell matrix and the base with a knife comprises: A tool is provided, the tip section of the tool is in the shape of protrusions on both sides and a depression in the middle; controlling the cutter to first cut off the shell matrix, and then cut into the base; The cutter is controlled to stop cutting. 5. The shell manufacturing method according to any one of claims 1 to 4, characterized in that, after the step of processing the shell matrix and the base to form antenna micro-slits, the first groove and the The inner wall on one side of the initial micro-slit is smoothly connected, and the second groove is smoothly connected to the inner wall on the other side of the initial micro-slit. 6. The housing manufacturing method according to claim 5, wherein the step of filling the antenna micro-slit with sealing glue comprises: Filling the first sealing glue in the micro-slit of the antenna, the first sealing glue filling the first groove and the second groove; The first sealing glue is cured to form a first sealing layer, and the first sealing layer covers the base. 7. The shell manufacturing method according to claim 6, wherein the step of filling the antenna micro-slit with sealing glue further comprises: Filling the second sealing glue on the first sealing layer; The second sealing glue is cured, and the second sealing layer is formed to fill up the micro-slit of the antenna. 8. A housing, characterized in that the housing comprises a housing base and a base layered with the housing base, an antenna micro-slit extending through the housing base and extending to the base, and filling in the base The sealing layer in the micro-slit of the antenna, the base has a top wall attached to the sealing layer, and the cross section of the top wall is convex in the middle and concave on both sides. 9. The casing according to claim 8, wherein the base comprises a first groove and a second groove and a protrusion formed between the first groove and the second groove, The antenna microslit includes a first side wall and a second side wall oppositely arranged, the first groove is smoothly connected with the first side wall, and the second groove is smoothly connected with the second side wall . 10. A mobile terminal, comprising the casing according to claim 8 or 9.