TWI639373B - Processing method of case clearance zone, case, and mobile terminal - Google Patents

Abstract

The invention discloses a method for processing a clearance area of a casing, comprising providing a casing made of a signal shielding material and having a predetermined area, the preset area comprising a first surface and a second surface disposed opposite to each other; The first surface of the preset area is machined with at least one support structure; the laser cutting machine is aligned with the second surface of the preset area, and the preset area is cut out by a preset number of micro slits, and the preset number of micro slits are mutually The spacing is arranged side by side; the non-signal shielding material is filled in each micro slit to obtain a clearance area; the support structure is cut off. The method provided by the embodiment of the invention cuts a preset number of micro slits on the shell by laser, and forms a clearance area by filling the material in the micro slit to obtain a clearance area of a specific shape, and at the same time, The narrowness reduces the proportion of the non-signal shielding material of the housing and ensures the appearance integrity of the housing. The present invention also provides a housing and a mobile terminal.

Description

Processing method, housing and mobile terminal of clearance area of housing

The present invention relates to the field of electronic devices, and in particular, to a method, a housing, and a mobile terminal for processing a clearance area of a casing.

With the development of technology and the needs of the market, the demand for all-metal mobile phones is growing. Although the all-metal mobile phone is beautiful, its metal casing will block the RF signal of the antenna.

In the prior art, a certain clearance area is generally processed by a numerical control machine tool on the back side of the metal mobile phone for the RF signal to pass, but the inventor found in the processing of the above process that the clearance area is limited by the tool or control mode of the numerical control machine tool. It is impossible to process a clearance area of a specific shape, or the clearance area is often large, which affects the overall feeling of the mobile phone.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of machining a clearance area of a casing that is capable of machining a casing of a specific shape of the clearance area and ensuring the overall appearance of the casing.

In order to solve the above technical problem, an embodiment of the present invention provides a processing method for a clearance area of a housing, including: Providing a housing made of a signal shielding material and having a predetermined area, the predetermined area including a first surface and a second surface disposed opposite each other; and processing on the first surface of the predetermined area At least one support structure for causing the support structure to protrude from the first surface; aligning the laser cutting machine with the second surface of the predetermined area, and cutting the preset area by a preset number a micro slit, the predetermined number of micro slits being spaced apart from each other, each of the support structures spanning the predetermined number of micro slits to join the shells as a whole; The non-signal shielding material is filled in the micro slit to obtain a clearance area; the support structure is cut off.

An embodiment of the present invention further provides a housing made of a signal shielding material and having a preset area; the preset area is provided with a preset number of micro slits, and the preset number of micro slits are mutually The spacers are arranged side by side, each of the micro slits being filled with a non-signal shielding material to form a clearance area for passing a radio frequency signal.

The embodiment of the invention further provides a mobile terminal, including a housing.

The processing method of the clearance area of the casing provided by the embodiment of the invention cuts a preset number of micro slits on the casing by laser, and forms a clearance area by filling the material in the micro slit to obtain a clearance of a specific shape. The area, meanwhile, due to the narrower micro-slit, reduces the use of the non-signal shielding material of the housing, ensuring the overall appearance of the housing.

The housing and the mobile terminal provided by the embodiments of the present invention have a clear area with a specific shape and a small area, which ensures the appearance integrity of the housing.

S101, S103, S105, S107, S109, S110, S120, S201, S203, S205, S207, S209, S210, S211, S220, S230, S240, S250‧‧

1‧‧‧Micro-seam

2‧‧‧Non-signal shielding materials

10‧‧‧ clearance area

100‧‧‧shell

1 is a schematic flow chart of a method for processing a clearance area of a casing according to an embodiment of the present invention; FIG. 2 is a schematic flow chart of step S107 of the processing method of FIG. 1; and FIG. 3 is another housing provided by an embodiment of the present invention. FIG. 4 is a schematic flow chart of the step S207 of the processing method of FIG. 3; and FIG. 5 is a schematic view of the housing provided by the embodiment of the present invention.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

In the description of the embodiments of the present invention, it is to be understood that the orientation or positional relationship indicated by the terms "lateral", "longitudinal", "length", "width", etc. is based on the orientation or positional relationship shown in the drawings, only The present invention and the simplification of the description are not to be construed as limiting or limiting the invention.

A method for processing a clearance area of a casing provided by an embodiment of the present invention will be described in detail below with reference to FIGS.

1 is a schematic flow chart of a method for processing a clearance area of a casing according to an embodiment of the present invention. As shown in FIG. 1, the method of the embodiment of the present invention may include the following steps S101, S103, S105, S107, and S109.

Step S101: providing a housing made of a signal shielding material and having a preset area, the preset area including a first surface and a second surface disposed opposite to each other.

Specifically, the housing is made according to actual needs. It can be understood that the housing can be a back cover of the mobile terminal. The preset area is set in a certain area of the housing according to actual needs, and the preset area is an area on the housing that needs to pass the radio frequency signal. Wherein, the first surface is the inner side surface of the back cover, the second surface is the outer side surface of the back cover, and the outer side surface is exposed to the air, that is, the surface that the user can directly contact. Of course, in other embodiments, the housing may also be a front case of the mobile terminal or a back cover with a bezel.

Preferably, the housing is fabricated by placing a metal sheet into a mold and punching it into a metal plate of a predetermined shape; and processing the internal structure and the external shape of the predetermined shape of the metal plate on a numerically controlled machine tool to obtain case. Among them, the metal plate is an aluminum plate, the large aluminum plate is cut into small pieces of aluminum plate, and the cut small piece of aluminum plate is put into a mold to be stamped to form a metal plate of a predetermined shape. It is understandable that aluminum The number of stampings of the sheet may be one time or multiple times of continuous stamping; the metal sheet is machined on a numerically controlled machine tool to form a desired shell.

Step S103: processing at least one supporting structure on the first surface of the preset area, so that the supporting structure protrudes from the first surface.

Specifically, the support structure is three, which are sequentially arranged on the first surface of the clearance area, that is, on the inner side surface, along the lateral direction, that is, the width direction of the housing, so that when the subsequent support structure is cut and removed, the first surface is The traces left are inside the mobile terminal, and the mobile terminal needs to be disassembled to observe, and does not affect the overall appearance of the mobile terminal. It can be understood that the support structure is a pier-like shape to prevent the casing from being deformed during the laser cutting process. Of course, in other embodiments, the support structure can It is thought that other structures can be used as support, for example, the support structure is a rib or a rib. Of course, in other embodiments, the number of support structures may be other.

Step S105: aligning the laser cutting machine with the second surface of the preset area to cut out a preset number of micro slits, the preset number of micro slits are arranged side by side, and each of the support structures spans the A predetermined number of micro slits are used to join the housings as a single unit.

Specifically, the laser of the high-power optical fiber laser cutting machine cuts the micro-seam from the first surface through the second surface, the preset number is three, and the three micro-slits are sequentially along the longitudinal direction of the casing, that is, the length direction thereof. Arranged at intervals. It can be understood that the slit width of the micro slit is less than 0.3 mm, and the micro slit is small, which is more suitable for the method. Among them, the invention has been studied through a large number of experiments, and the slit width of the micro slit can be made 0.05 mm to 0.15 mm by the processing method in the embodiment of the present invention. In this embodiment, the slit width of the micro slit is 0.06 mm, and the naked eye is almost It is invisible to ensure that the radio frequency signal of the antenna in the mobile terminal can pass and also improve the overall appearance of the casing. Each support structure spans three micro slits, that is, blocks three micro slits to form a good support structure. Of course, in other embodiments, the number of micro slits may be other.

Preferably, the auxiliary cooling process is simultaneously performed during the laser cutting process to reduce the temperature during the laser cutting process to form the desired micro slit. It can be understood that the auxiliary cooling treatment is a high pressure nitrogen assisted cooling treatment.

Step S107: filling the non-signal shielding material in each of the micro slits to obtain a clearance area.

Specifically, the casing having the clearance area is etched. Among them, the non-signal shielding material is a material that can pass the radio frequency signal. It will be appreciated that the non-signal shielding material can be glue. Each micro slit filled with a non-signal shielding material can form a clearing area of the antenna through the RF signal of the antenna, that is, a plurality of micro slits. Of course, in other embodiments, the non-signal shielding material may also be plastic, and each of the micro slits is subjected to nano (NMT) injection molding to obtain a clearance area.

Step S109: cutting the support structure.

Specifically, the support structure is cut by a numerically controlled machine tool while completing the structure of other parts of the housing.

As shown in FIG. 2, step S107 includes the following steps S110 to S120.

Step S110: placing the shell between the dispenser and the suction jig, and the dispenser dispenses the glue in the micro slit through the suction fixture while dispensing the micro slit.

Wherein, the housing is placed between the dispenser and the suction jig, the first surface of the housing faces the dispensing head of the dispenser, and the second surface faces the suction fixture, and is preset by the dispenser The number of micro slits is filled with a non-signal shielding material while the getter jig inhales the non-signal shielding material in the micro slit. Specifically, the housing is placed on the positioning fixture of the dispenser to ensure the alignment and tolerance of the dispensing head and the micro slit of the dispenser. At the same time, a plurality of through holes are formed in the positioning fixture to form a suction clamp. When the housing is placed on the positioning fixture, it can be located between the dispensing head of the dispenser and the suction clamp, and the dispensing head performs the micro slit. Filling the non-signal shielding material, the non-signal shielding material in the micro slit corresponding to the plurality of through holes on the suction jig is inhaled to form a negative pressure between the casing and the suction jig, so that the non-signal shielding in the micro slit The material has fluidity and can flow from the first side to the second side and is uniformly filled in the micro slit to achieve complete filling of the non-signal shielding material in the micro slit.

Step S120: curing the non-signal shielding material.

Specifically, the predetermined number of non-signal shielding materials in the micro slits are cured. Among them, after the non-signal shielding material is completely filled in the micro slit, it is necessary to cure the non-signal shielding material. It can be understood that the non-signal shielding material in the micro slit can be cured by ultraviolet curing or baking.

The micro-seam filling method of the shell provided by the embodiment of the invention dispenses the first side of the shell by the dispenser, and simultaneously sucks the glue in the micro-slit by the suction jig on the second side of the shell. The negative pressure is formed to improve the fluidity of the glue, so that the glue in the dispenser can be uniformly filled in the casing, thereby improving the appearance integrity of the casing.

The processing method of the clearance area of the casing provided by the embodiment of the invention cuts a preset number of micro slits on the casing by laser, and forms a clearance area by filling the material in the micro slit to obtain a clearance of a specific shape. The area, meanwhile, due to the narrower micro-slit, reduces the use of the non-signal shielding material of the housing, ensuring the overall appearance of the housing.

FIG. 3 is a schematic flow chart of a method for processing a clearance area of another housing according to an embodiment of the present invention. As shown in FIG. 3, the method of the embodiment of the present invention may include the following steps S201, S203, S205, S207, S209, and S211.

Step S201: providing a housing made of a signal shielding material and having a predetermined area, the preset area including a first surface and a second surface disposed opposite to each other. Specifically, the housing is made according to actual needs. It can be understood that the housing can be a back cover of the mobile terminal. The preset area is set in a certain area of the housing according to actual needs, and the preset area is an area on the housing that needs to pass the radio frequency signal. Wherein, the first surface is the inner side surface of the back cover, the second surface is the outer side surface of the back cover, and the outer side surface is exposed to the air, that is, the surface that the user can directly contact. Of course, in other embodiments, the housing may also be a front case of the mobile terminal or a back cover with a bezel.

Preferably, the housing is fabricated by placing a metal sheet into a mold and punching it into a metal plate of a predetermined shape; and processing the internal structure and the external shape of the predetermined shape of the metal plate on a numerically controlled machine tool to obtain case. Among them, the metal plate is an aluminum plate, the large aluminum plate is cut into small pieces of aluminum plate, and the cut small piece of aluminum plate is put into a mold to be stamped to form a metal plate of a predetermined shape. It is understandable that aluminum The number of stampings of the sheet may be one time or multiple times of continuous stamping; the metal sheet is machined on a numerically controlled machine tool to form a desired shell.

Step S203: processing at least one supporting structure on the first surface of the preset area, so that the supporting structure protrudes from the first surface.

Specifically, the support structure is three, which are sequentially arranged on the first surface of the clearance area, that is, on the inner side surface, along the lateral direction, that is, the width direction of the housing, so that when the subsequent support structure is cut and removed, the first surface is The traces left are inside the mobile terminal, and the mobile terminal needs to be disassembled to observe, and does not affect the overall appearance of the mobile terminal. It can be understood that the support structure is a pier-like shape to prevent the casing from being deformed during the laser cutting process. Of course, in other embodiments, the support structure may be other structures as long as it supports, for example, the support structure is a rib or a rib. Of course, in other embodiments, the number of support structures may be other.

Step S205: aligning the laser cutter with the second surface of the preset area to cut out a preset number of micro slits, the preset number of micro slits being juxtaposed, each of the support structures spanning the A predetermined number of micro slits are used to join the housings as a single unit.

Specifically, the laser of the high-power optical fiber laser cutting machine cuts the micro-seam from the first surface through the second surface, the preset number is three, and the three micro-slits are sequentially along the longitudinal direction of the casing, that is, the length direction thereof. The arrangement of the spacers, wherein the inventors have conducted a large number of experiments to study that the slit width of the micro slits is 0.05 mm to 0.15 mm by the processing method in the embodiment of the present invention. In the present embodiment, the slit width of the micro slits is 0.06 mm. The naked eye is almost invisible, ensuring that the radio frequency signal of the antenna in the mobile terminal can pass while also improving the overall appearance of the casing. Each support structure spans three micro slits, that is, blocks three micro slits to form a good support structure. Of course, in other embodiments, the number of micro slits may be other.

Preferably, the auxiliary cooling process is simultaneously performed during the laser cutting process to reduce the temperature during the laser cutting process to form the desired micro slit. It can be understood that the auxiliary cooling treatment is a high pressure nitrogen assisted cooling treatment.

Step S207: filling the non-signal shielding material in each of the micro slits to obtain a clearance area.

Specifically, the casing having the clearance area is etched. Among them, the non-signal shielding material is a material that can pass the radio frequency signal. It can be understood that the non-signal shielding material can be plastic. Wherein each of the micro slits is subjected to nano (NMT) injection molding to obtain a clearance area. Each micro slit filled with a non-signal shielding material can form a clearing area of the antenna through the RF signal of the antenna, that is, a plurality of micro slits.

S209: Surface treating the casing having the clearance area.

Specifically, the shell having the clearance area is subjected to surface polishing, sand blasting, anodizing to form a multi-color appearance effect, and the performance of the housing is further improved.

Step S211: cutting the support structure.

Specifically, the support structure is cut by a numerically controlled machine tool while completing the structure of other parts of the housing.

As shown in FIG. 4, step S207 of the second embodiment of the present invention may include the following steps S210, S220, S230, S240, and S250.

Step S210: cleaning the casing.

Specifically, after the micro-seam is processed in the casing, there may be burrs or dirt on the inner, outer or circumferential surface of the micro-slit, and the surface of the casing is processed in order to facilitate filling the micro-slit of the casing. It can be understood that the burrs and dirt of the casing are removed to facilitate subsequent filling of the micro slits of the casing, thereby further improving the appearance integrity of the casing.

Step S220: placing the shell between the dispenser and the suction jig, and the dispenser dispenses the glue in the micro slit through the suction fixture while dispensing the micro slit.

Wherein, the housing is placed between the dispenser and the suction jig, the first surface of the housing faces the dispensing head of the dispenser, and the second surface faces the suction fixture, and is preset by the dispenser The number of micro slits is filled with a non-signal shielding material while the getter jig inhales the non-signal shielding material in the micro slit. Specifically, the housing is placed on the positioning fixture of the dispenser to ensure the alignment and tolerance of the dispensing head and the micro slit of the dispenser. At the same time, a plurality of through holes are formed in the positioning fixture to form a suction clamp. When the housing is placed on the positioning fixture, it can be located between the dispensing head of the dispenser and the suction clamp, and the dispensing head performs the micro slit. fill Filling the non-signal shielding material, the non-signal shielding material in the micro slit corresponding to the plurality of through holes on the suction jig is inhaled to form a negative pressure between the casing and the suction jig, so that the non-signal shielding in the micro slit The material has fluidity and can flow from the first side to the second side and is uniformly filled in the micro slit to achieve complete filling of the non-signal shielding material in the micro slit.

Step S230: curing the non-signal shielding material.

Specifically, the predetermined number of non-signal shielding materials in the micro slits are cured. Among them, after the non-signal shielding material is completely filled in the micro slit, it is necessary to cure the non-signal shielding material. It can be understood that the non-signal shielding material in the micro slit can be cured by ultraviolet curing or baking.

Step S240: removing the non-signal shielding material on the casing.

Specifically, after the non-signal shielding material in the micro-seam is filled and solidified, it may overflow the micro-seam and adhere to the surface of the casing, which affects the overall appearance of the casing, so the non-signal shielding material on the casing is removed by a numerically controlled machine tool. . Preferably, the non-signal shielding material on the surface of the casing is completely taken out by taking out a thickness of the casing of the casing by a numerically controlled machine tool.

Step S250: Surface treatment of the casing. The housing is subjected to at least one surface treatment of surface polishing, sand blasting or anodizing.

Specifically, the housing is subjected to at least one surface treatment of surface polishing, sand blasting or anodizing. Among them, the shell is surface treated by anodization to further improve the appearance of the shell.

The processing method of the clearance area of the casing provided by the embodiment of the invention cuts a preset number of micro slits on the casing by laser, and forms a clearance area by filling the material in the micro slit to obtain a clearance of a specific shape. The area, at the same time, because the micro slits are narrow, the proportion of the non-signal shielding material of the casing is reduced, and the appearance integrity of the casing is ensured.

The housing provided by the embodiment of the present invention will be described in detail below with reference to FIG. It should be noted that the mobile terminal shown in FIG. 5 is manufactured by the method of the embodiment shown in FIG. 1 to FIG. 4. For the convenience of description, only parts related to the embodiment of the present invention are shown, and the specific technical details are not provided. For the disclosure, please refer to the embodiment shown in FIGS. 1-4.

In this embodiment, the mobile terminal includes the housing 100 manufactured by the method of the embodiment shown in FIG. 1 to FIG. 4, wherein the mobile terminal according to the embodiment of the present invention may be any device having communication and storage functions. For example: tablet computers, mobile phones, e-readers, remote controls, personal computers (PCs), notebook computers, car devices, Internet TVs, wearable devices and other smart devices with network capabilities.

In this embodiment, the housing 100 is a back cover of the mobile terminal. The housing 100 is made of a signal shielding material. It can be understood that the signal shielding material is metal. In this embodiment, the material of the housing is aluminum. The housing 100 has a preset area, the preset area is provided with a preset number of micro slits 1, and a preset number of micro slits 1 are arranged side by side, and each of the micro slits 1 is filled with a non-signal shielding material 2 for forming The non-signal shielding material 2 is plastic or rubber. In this embodiment, the non-signal shielding material 2 is glue, which further facilitates the transmission of the radio frequency signal. Of course, in other embodiments, the housing 100 can also be a front cover or a back cover with a bezel.

The micro slits 1 are three, and the micro slits 1 are sequentially disposed on the casing 100 along the longitudinal direction L1 of the casing, that is, the longitudinal direction thereof.

It can be understood that, in order to ensure the integrity of the appearance of the housing 100, the slit width of the micro slit 1 is 0.05 to 0.15 mm. In the embodiment, the slit width of the micro slit 1 is 0.06 mm, and the two adjacent micro slits are adjacent. The spacing between 1 is greater than the slit width of the micro slit 1, further improving the overall appearance of the housing 100. The housing 100 and the mobile terminal provided by the embodiments of the present invention have a clearance area with a specific shape and a small area, which ensures the appearance integrity of the housing.

The modules or units of the embodiments of the present invention may be combined or split according to actual needs. The above is an embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the embodiments of the present invention. It is also considered to be the scope of protection of the present invention.

Claims (16)

A method for processing a clearance area of a casing, comprising: providing a casing, the casing being made of a signal shielding material and having a predetermined area, wherein the predetermined area comprises a first a surface and a second surface; at least one support structure is formed on the first surface of the predetermined area such that the support structure protrudes from the first surface; and a laser cutting machine pair is Locating the second surface of the preset area and cutting the preset area into a preset number of micro slits, the preset number of micro slits being spaced apart from each other, each of the support structures spanning The preset number of micro slits to connect the housing as a whole; placing the housing between a dispenser and a suction fixture, the first surface of the housing a pair of plastic heads facing the dispenser, the second surface facing the suction jig, the dispenser dispensing the predetermined number of micro slits, and the suction treatment Having aspiration to the predetermined number of non-signal shielding materials within the micro-slit, the non-signal Shielding material is a glue; and said predetermined number of slits signal non-shielding material is cured; and removal of the support structure. The method of claim 1, wherein before the step of placing the casing between the dispenser and the suction jig, the method further comprises the step of cleaning the casing. The method of claim 2, wherein before the step of placing the casing between the dispenser and the suction jig, the method further comprises: removing a burr of the casing and Dirty steps. The method of claim 3, wherein after the step of curing the non-signal shielding material in the predetermined number of micro slits, the method further comprises: A step of removing a non-signal shielding material on the housing using a numerically controlled machine tool. The method of claim 4, wherein the non-signal shielding material on the housing is removed by removing a predetermined thickness of the housing by a numerically controlled machine tool. The method of claim 4, wherein after the step of removing the non-signal shielding material on the casing by the numerically controlled machine tool, the method further comprises: surface polishing, sandblasting or At least one surface treatment step of anodizing. The method according to any one of claims 1 to 6, wherein the slit width of the micro slit is less than 0.3 mm. The method of any one of claims 1 to 6, wherein the housing is a back cover of the mobile terminal. The method of claim 8, wherein the first surface is an inner side surface of the housing, and the second surface is an outer side surface of the housing. The method of claim 9, wherein the step of fabricating the casing comprises: a step of placing a metal sheet into a mold and stamping into a metal plate of a predetermined shape; and The step of processing the internal structure and the external shape of the predetermined shape of the metal plate on the bed to obtain a casing. The method of any one of clauses 1 to 6, wherein the cutting the laser cutting machine to align a second surface of the predetermined area to cut a predetermined number of micro slits, The preset number of micro slit spacings are juxtaposed, and the step of blocking the predetermined number of micro slits by the supporting structure comprises: a step of performing an auxiliary cooling process during the laser cutting process. The method of claim 11, wherein the auxiliary cooling treatment is a high pressure nitrogen assisted cooling treatment. The method of any one of clauses 1 to 6, wherein the step of cutting the support structure further comprises: a step of cutting the support structure by a numerically controlled machine tool. A housing, wherein the housing is made of a signal shielding material and has a preset area; the preset area is provided with a preset number of micro slits, and the preset number of micro slits are arranged side by side with each other Each of the micro slits is filled with a non-signal shielding material for forming a clearance area, the clearance area is for passing a radio frequency signal, the non-signal shielding material is glue, and the non-signal shielding material is passed through a dispenser and a suction The gas jig is filled in the micro slit and formed by a curing process. The casing of claim 14, wherein the slit has a slit width of less than 0.3 mm. A mobile terminal, comprising the housing according to any one of claims 14 to 15.