CN107683050B - Shell, mobile terminal and shell manufacturing method - Google Patents

Abstract

The invention relates to the field of electronic equipment, and discloses a shell which comprises a metal substrate and a first plastic body, wherein the metal substrate comprises a first surface and a second surface which are oppositely arranged, a groove is formed in the first surface, at least two micro-seams are formed in the second surface, the at least two micro-seams are communicated with the groove, and the first plastic body is filled in the at least two micro-seams and the groove. The groove on the first surface is communicated with the at least two micro-seams on the second surface, so that the first plastic bodies filled in the micro-seams and the groove are communicated into a whole in the metal matrix, and the integral rigidity of the micro-seam structure is improved. The invention also provides a mobile terminal and a shell manufacturing method.

Description

Housing, mobile terminal and method for making housing

technical field

The invention relates to the field of electronic equipment, and in particular, to a casing, a mobile terminal and a manufacturing method of the casing.

Background technique

In today's mobile terminal market, all-metal housings are increasingly favored by consumers. However, although a mobile terminal with an all-metal casing is beautiful, for many mobile terminals with antennas that need to receive or transmit radio frequency signals, the shielding effect of the all-metal casing on radio frequency signals has become an obstacle to its application as a casing. .

Mobile terminal manufacturers have made a lot of optimization and improvement in the existing design for this defect. The more common way of improvement is to machine a gap through the metal shell on the back of the metal mobile phone through a CNC machine, and inject plastic and other non-materials into the gap. Shielding material to form a clear area for the passage of radio frequency signals. However, non-shielding materials such as plastic are filled on the metal shell, and the hardness of the material is lower than that of metal, and the thermal expansion and contraction rate is also different from that of metal. Therefore, during long-term use, scratches or cracks are prone to appear in the gaps of the metal shell. On the other hand, the overall consistency and tactility of the mobile terminal casing are also affected to a certain extent.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a casing, a mobile terminal and a method for manufacturing the casing, which can effectively improve the overall rigidity and appearance consistency of the clearance area of the gap.

In order to solve the above technical problems, the embodiments of the present invention provide the following solutions:

In one aspect, a housing is provided, including a metal base body and a first plastic body, the metal base body includes a first surface and a second surface arranged opposite to each other, the first surface is provided with a groove, and the second surface is provided with each other at least two micro-slots spaced apart, the at least two micro-slots all penetrate to the groove, the first plastic body is filled in the at least two micro-slots and the groove, the first plastic body The body adopts non-signal shielding material.

In another aspect, a mobile terminal is also provided, including the above casing.

In another aspect, a method for manufacturing a shell is also provided, comprising the steps of:

Machining grooves on the first surface of the metal base;

filling the groove with a second plastic body;

At least two micro-slits are processed on the metal base, the metal base further includes a second surface opposite to the first surface, and the at least two micro-slots penetrate from the second surface to the concave groove;

removing the second plastic body in the groove;

filling a first plastic body in the at least two micro-slits and the groove; and

curing the first plastic body.

In the case provided by the embodiment of the present invention, the micro-slits are arranged side by side in the clearance area, and the micro-slits are connected through the grooves, and the respective independent elongated thin-layer structure non-shielding materials are connected to each other. The connection is integrated as a whole, and the strip-shaped metal support formed between the adjacent micro-slits makes the non-shielding material in the clearance area have better connectivity and rigidity than the existing design. At the same time, during the processing process The provision of the second plastic body with transitional properties greatly improves the manufacturability of the metal substrate after the groove is formed, which helps to reduce the difficulty of micro-seam processing and improve the yield. The micro-slots of the mobile terminal provided by the embodiments of the present invention are connected to each other and support each other, which ensures the rigidity of the metal casing.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. As far as technical personnel are concerned, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the schematic diagram of the casing section of the present invention;

Fig. 2 is the schematic diagram of the appearance of the casing of the present invention;

Fig. 3 is the schematic diagram of the appearance of the terminal of the present invention;

Fig. 4 is the schematic flow chart of the first embodiment of the method of the present invention;

5 is a schematic diagram of a second injection molded body during an embodiment of the method of the present invention;

6 is a schematic diagram of filling a first injection molded body during an embodiment of the method of the present invention;

FIG. 7 is a schematic flowchart of the second embodiment of the method of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the term "thickness" and the like is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than implying Or indicating that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to FIG. 1, a cross-sectional view of a housing 200 according to an embodiment of the present invention provides a metal base 100. The metal base 100 is provided with a first surface 01 and a second surface 02 opposite to each other, and the first surface 01 defines a groove. 11. The second surface 02 is provided with at least two micro-slits 21 arranged side by side and spaced apart from each other. The at least two micro-slits 21 penetrate the metal base 100 to the groove 11. The micro-slits 21 and the groove 11 are all filled with the first plastic body 001, and the first plastic body 001 is made of non-signal shielding material, usually plastic glue.

Usually, the gap directly opened on the casing 200 is wider, and the micro-slits 21 are arranged side by side to form a clearance zone structure in which "metal-micro-slit material-metal" is staggered, which can better avoid wide clearance The zone affects the strength of the metal enclosure, as well as the appearance consistency and feel, while ensuring sufficient headroom area. However, since the micro-slots 21 must completely penetrate the casing 200, the non-shielding material filled in the micro-slots 21 has an elongated thin-layer structure, and multiple rows of elongated thin-layer structures are arranged side by side, which is not conducive to The rigidity control of the metal substrate 100 also puts forward higher technological requirements on the machining accuracy and surface roughness of each of the micro-slits 21 , which is likely to affect the yield of the product.

It can be understood that after each of the micro-slots 21 is communicated with the groove 11 , because the first plastic body 001 filled in the groove and the first plastic body 001 filled in each of the micro-slots 21 are A plastic body 001 is connected as a whole, the overall structural stability of the first plastic body 001 is greatly improved, and the stable first plastic body 001 also improves the metal base 100, and even the The overall rigidity and structural stability of the casing 200 , and the elongated metal parts staggered between the micro-slits 21 , that is, the frame strips 22 also maintain the integrity of the casing 200 in appearance and touch.

Preferably, the metal substrate 100 is cut by means of laser cutting, and the slit width of the micro slits 21 is less than 0.3 mm.

In this embodiment, a frame bar 22 extending along a first direction is formed between two adjacent micro-slits 21 . FIG. 1 is a cross-sectional view perpendicular to the first direction. The first plastic body 001 Preferably, the injection is performed from the first surface 01, that is, the groove 11, and the filling starts from the second surface 02, that is, the micro-slots 21. The injected plastic fills the micro-slots 21 first and then fills all the micro-slots 21. The groove 11 is described. The reason for this setting is that the gap of the micro-slit 21 is too small, and the filling process is more complicated. Therefore, the opening width of the groove 11 on the first surface 01 should be larger than the opening width of the micro-slit 21 on the second surface 02, so as to ensure that the plastic injection port is larger than the molding port. The process of injection is in an aggregated state to avoid defects such as bubbles due to uneven diffusion of the plastic, which damages the injection quality and the final molding quality of the first injection body 001 . The opening width of the micro slits 21 on the second surface 02 is understood in this embodiment as the distance between the two farthest side walls of the plurality of micro slits 21 arranged side by side.

Further, on the cross section perpendicular to the first direction, the groove 11 is set in a trapezoid shape, and the long side of the trapezoid is the boundary line between the groove 11 and the first surface 01 , namely The short side of the trapezoid is the interface between the groove 11 and the micro-slit 21. This arrangement can further utilize the sidewall of the groove 11 to guide the plastic glue to continuously gather inward during the filling process, thereby improving the efficiency of the filling process. filling quality. On the other hand, because the micro-slit 21 is cut by laser, it usually appears as a straight surface in this section, and the opening width of the micro-slot 21 is the width of the micro-slot 21 at the interface between the micro-slot 21 and the groove 11 . Maximum width of seam 21. The trapezoidal arrangement can ensure that the side wall of the groove 11 is wider than the overall width of the plurality of the micro-slots 21 , which avoids the appearance of inverted tapered shapes that are not conducive to plastic glue molding during the filling process, and ensures the filling quality.

In an embodiment, it can be seen from this section that because the micro-slots 21 are vertical through holes, the position where each micro-slot 21 meets the groove 11, that is, the frame bar 22 faces The peripheries of the end faces of the grooves 11 all form right angles. After the first injection body 001 is formed, the first injection body 001 also forms a corresponding right angle shape. This right-angle shape is not conducive to the stress release of the first injection molded body 001 during the injection molding process, and it is easier to form stress concentration points after long-term use, resulting in cracks and the like, which ultimately result in the appearance and structural stability of the first injection molded body 001 . Therefore, rounding transition processing is performed on the right angles around the end face of the groove 22 , which can further improve the structural stability of the first injection molded body 001 .

In this embodiment of the present invention, the casing 200 is made of the metal base 100 (see FIG. 2 ), and the casing 200 may be a back cover or a back cover of a mobile terminal (see FIG. 3 ). The mobile terminal involved in the embodiments of the present invention may be any device with communication and storage functions, such as a tablet computer, a mobile phone, an electronic reader, a remote control, a personal computer (Personal Computer, PC), a notebook computer, a vehicle-mounted device, an Internet TV, Wearable devices and other smart devices with network functions. Because the mobile terminal uses the casing of the present invention, it has better appearance consistency and structural stability while realizing radio frequency signal transmission and reception.

Please refer to FIG. 4 , which is a schematic flowchart of a method for manufacturing a casing provided in an embodiment of the present invention. The method in an embodiment of the present invention may include the following steps S11 to S16:

S11: Provide a piece of metal base 100, the metal base 100 includes a second surface 02 and a first surface 01 disposed opposite to each other, and a groove 11 is processed on the first surface 01;

Specifically, the metal base 100 may be a casing 200 of a mobile terminal, that is, a back cover or a back cover. The grooves 11 processed on the first surface 01 cooperate with the micro-slits 21 to be processed later, so the shape of the grooves 11 corresponds to the shape of the micro-slits 21 to be formed. .

S12: injecting and filling the second plastic body 002 in the groove 11;

Specifically, referring to FIG. 5 , in the injection filling of the groove 11 , the metal base 100 is placed on the positioning jig 400 of the glue dispenser 300 , because the second plastic body 002 belongs to the process transition For the filler, the main concern is that the second plastic body 002 should stick to the bottom surface of the groove 11 as much as possible, so as to facilitate the subsequent processing of the micro-slit 21 . Because the second plastic body 002 is a process transition filler, when the second plastic body 002 is partially higher than the first surface 01 or partially lower than the first surface 01 after the injection molding of the second plastic body 002 is completed, the subsequent The process has little impact. It can be understood that the second plastic body 002 may be an insulating layer in the case processing process.

S13: Process at least two micro-slots 21 on the second surface 02 facing the groove 11, and the machining depths of the at least two micro-slots 21 penetrate the metal base 100 and reach the first Two plastic body 002;

Specifically, the micro slits 21 may be processed by cutting the metal base 100 by means of laser cutting. It can be understood that the slit width of the micro slits 21 is less than 0.3 mm, and the smaller the micro slits 21 is, the more suitable the laser cutting method is. Of course, in other embodiments, the slit width of the micro slits 21 may be greater than or equal to 0.3 mm. Due to the filling of the second plastic body 002, the part of the groove 11 can provide a certain support for the processing of the micro-slot 21, and enhance the rigidity of the micro-slit 21 during processing, so that the micro-slit 21 can be processed. 21 is not easily deformed such as torsion, inclination, etc. during processing, which is beneficial to improve the processing performance of the micro-slits 21 and reduce the processing difficulty.

S14 : processing and removing the second plastic body 002 in the groove 11 , so that the at least two micro-slits 21 communicate through the groove 11 ;

Specifically, because the depths of the at least two micro-slits 21 have reached from the second surface 02 to the second plastic body 002 , after the processing and removal of the plastic body 001 is completed, the at least two Both the two micro-slots 21 have penetrated the bottom surface of the groove 11, and there are at least two penetration paths of the micro-slots 21 between the second surface 02 and the first surface 01, forming the clearance required by the antenna District structure.

S15: injecting and filling the first plastic body 001 in the at least two micro-slits 21 and the groove 11;

Specifically, as shown in FIG. 6 , for injection molding in the at least two micro-slots 21 and the groove 11 , a stopper 420 needs to be provided at the other end of the plastic injection port to prevent the plastic from continuously falling down the through hole. On the side of the injection port, the final molding height should be controlled. It can be understood that the final molded first plastic body 001 should be flush with the second surface 02 and the first surface 01 , at least not lower than the second surface 02 or the first surface 01 .

S16: Curing the first plastic body 001.

Specifically, after the first plastic body 001 is cured, the filling of the micro-slits 21 is completed, and there is no gap in the entire metal base 100 , and the second surface 02 and the first surface 01 belong to smooth.

In the method for manufacturing the metal base shell provided by the embodiment of the present invention, the plastic bodies in the juxtaposed elongated micro-slots are connected into one through the first plastic body in the groove area, which is more helpful. Due to the structural stability of the plastic body in each micro-slit, the appearance consistency and reliability of the casing can be improved after injection molding is completed. On the other hand, the second plastic body is used as a transition filling material in the process, which ensures the rigidity of the groove, provides a strong support during the processing of the micro-slit, ensures the processing quality of the micro-slit, reduces the The processing difficulty of the micro-slits.

Please refer to FIG. 7 , which is a schematic flowchart of a method for manufacturing a casing according to a second embodiment of the present invention. The specific method may include the following steps S21 to S29:

S21. Provide a piece of metal base 100, the metal base includes a second surface 02 and a first surface 01 arranged oppositely, and the groove 11 is processed on the first surface 01;

Specifically, the metal base 100 may be a casing 200 of a mobile terminal, that is, a back cover or a back cover. The grooves 11 processed on the first surface 01 cooperate with the micro-slits 21 to be processed later, so the shape of the grooves 11 corresponds to the shape of the micro-slits 21 to be formed. , on a cross section perpendicular to the first direction, the width of the opening of the groove 11 on the first surface 01 should not be smaller than the width of the micro slit 21 to be formed.

Obviously, the groove 11 can be machined by a numerically controlled machine, and better machining quality can be obtained. In order to form the width of the groove 11 not less than the width of the micro-slot 21 to be formed, it can be controlled by milling, and there are two specific implementations:

S211. When the milling cutter vertically processes the groove 11, a conical milling cutter is used. The transverse minimum width of the conical milling cutter is at the cutter head, and the farther the cutter body is from the cutter head, the larger the transverse width is. One way of expression is that the diameter of the tapered milling cutter decreases in the direction from the cutter body to the cutter head, and the shape of the groove 11 can be formed at this time;

S212. When the milling cutter is inclined to process the groove 11, a cylindrical milling cutter can be used. At this time, the cylindrical milling cutter should be inclined relative to the metal base 100, the cutter head is inclined to the inside of the groove, and the cutter body towards the outside of the groove. It can be understood that such inclined machining is usually realized by inclined clamping of the base body 100 on a CNC milling machine.

S22. Injection molding and filling the second plastic body 002 in the groove 11;

Specifically, in the injection molding filling in the groove 11, the metal base 100 is placed on the positioning fixture of the dispensing machine, the first surface 01 is upward, and the dispensing head of the dispensing machine is facing the For the groove 11 , because the second plastic body 002 belongs to the process transition filler, the main concern is that the second plastic body 002 should be attached to the bottom surface of the groove 11 as much as possible, so as to facilitate the subsequent micro-slits 21 processing. Because the second plastic body 002 is a process transition filler, when the second plastic body 002 is partially higher than the first surface 01 or partially lower than the first surface 01 after the injection molding of the second plastic body 002 is completed, the subsequent The process has little impact.

S23. Process at least two micro-slits 21 on the second surface 02 facing the groove 11, and the machining depths of the at least two micro-slots 21 penetrate the metal base 100 and reach the first Two plastic body 002;

Specifically, the micro slits 21 may be processed by cutting the metal base 100 by means of laser cutting. It can be understood that the slit width of the micro slits 21 is less than 0.3 mm, and the smaller the micro slits 21 is, the more suitable the laser cutting method is. Of course, in other embodiments, the slit width of the micro slits 21 may be greater than or equal to 0.3 mm. Due to the filling of the second plastic body 002, the part of the groove 11 can provide a certain support for the processing of the micro-slot 21, and enhance the rigidity of the micro-slit 21 during processing, so that the micro-slit 21 can be processed. 21 is not easily deformed such as torsion, inclination, etc. during processing, which is beneficial to improve the processing performance of the micro-slits 21 and reduce the processing difficulty. Obviously, the micro-slits 21 can also be processed by a numerically controlled machine, so that better surface quality can be obtained.

S24. Process and remove the second plastic body 002 in the groove 11, so that the at least two micro-slits 21 communicate through the groove 11;

Specifically, because the depths of the at least two micro-slits 21 have reached from the second surface 02 to the second plastic body 002 , after the processing and removal of the plastic body 001 is completed, the at least two Both the two micro-slots 21 have penetrated the bottom surface of the groove 11, and there are at least two penetration paths of the micro-slots 21 between the second surface 02 and the first surface 01, forming the clearance required by the antenna District structure. Obviously, the second plastic body 002 can be removed by a numerical control machine, and a better removal effect can be obtained.

S25. rounding the right angle on the circumference of the frame strip 22 toward the end face of the groove 11;

Specifically, the right-angle portion can be rounded with a forming tool, which is a relatively mature process, and the purpose is to form a rounded corner on the housing 200 to eliminate local stress concentration.

In addition, after the fillet processing is completed, there may be burrs or dirt on the inner, outer or peripheral surfaces of the micro-slits 21 and the grooves 11. In order to facilitate filling of the micro-slits 21, the metal The surface of the base body 100 is processed.

S26. Injection-filling the first plastic body 001 in the at least two micro-slits 21 and the groove 11;

Specifically, as shown in FIG. 6 , the injection molding in the at least two micro-slots 21 is preferably set before the injection molding action of the groove 11 . Because the optimal injection molding condition for the micro-slit 21 is when both ends of the micro-slit 21 are in the passage. If the groove 11 is injected first, one end of the micro-slot 21 has already been filled with the first plastic body 001, and then filling the narrow micro-slot 21 will make it relatively difficult to control the generation of air bubbles, etc. unfavorable factors. It can be understood that the first plastic body 001 should be flush with the second surface 02 and the first surface 01 , at least not lower than the second surface 02 or the first surface 01 .

Specifically, when the micro-slit 21 is filled by injection molding, the base 100 is placed between the glue dispenser 300 and the suction jig 400, the second surface 02 faces the suction jig 400, and the The first side 01 is facing the dispensing head 310 of the glue dispenser 300 , the glue dispenser 300 dispenses glue to at least one of the micro-slits 21 , and the suction fixture 400 dispenses glue to the micro-slot 21 . Inhale the plastic glue. Specifically, the substrate 100 is placed on the positioning jig 410 of the glue dispenser 300 to ensure the alignment and tolerance of the glue dispenser 310 of the glue dispenser 300 and the micro-slit 21, and at the same time The suction jig 400 is formed by opening a plurality of through holes 401 on the positioning jig 410 . When the base 100 is placed on the positioning jig 410 , it can be positioned at any position of the glue dispenser 300 . Between the dispensing head 310 and the suction jig 400, the dispensing head 310 dispenses glue to the micro-slits 21, and the plurality of through holes 401 on the suction jig 400 correspond to them. The plastic glue in the micro-slot 21 is sucked to form a negative pressure between the base 100 and the suction fixture 400 , so that the plastic glue in the micro-slot 21 has fluidity and can be discharged from the The first surface 01 flows to the second surface 02 and is uniformly filled in the micro-slots 21 , so that the plastic glue in the micro-slots 21 is completely filled.

Specifically, on the suction jig 400, a retaining wall 420 is provided at the gap of the micro-slit 21, and the retaining wall 420 has a plurality of the through holes 401, which can correspond to the first plastic The molding and positioning of the body 001 on the end face of the micro-slot 21 .

S27. Curing the first plastic body 001;

Specifically, after the first plastic body 001 is cured, the filling of the micro-slits 21 is completed, and there is no gap in the entire metal base 100 , and the second surface 02 and the first surface 01 belong to smooth.

S28. Use a CNC machine to remove the portion of the first plastic body 001 overflowing from the second surface 02 and the first surface 01;

Specifically, after the first plastic body 001 is filled and cured, a part of the first plastic body 001 may overflow the second surface 02 or part of the first surface 01 , or be adhered to the surface of the metal base 100 , affecting the metal base Since the appearance of the metal base 100 is integral, a CNC machine is used to remove the plastic on the metal base 100 . Preferably, the plastic material on the surface of the metal base 100 is completely removed by taking out a certain thickness of the metal material of the metal base 100 by a numerically controlled machine.

S29. Perform at least one surface treatment of surface polishing, sandblasting or anodizing on the metal substrate 100 .

Specifically, at least one surface treatment of surface polishing, sandblasting or anodizing is performed on the metal substrate 100 . Wherein, the surface treatment of the metal base 100 is performed by means of anodization, so as to further improve the appearance consistency of the metal base 100 .

The modules or units in the embodiments of the present invention may be combined or split according to actual requirements.

The above are the implementations of the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the embodiments of the present invention, several improvements and modifications can also be made. These improvements and modifications are also It is regarded as the protection scope of the present invention.

Claims (13)

1. a shell making method, is characterized in that, comprises the steps: Machining grooves on the first surface of the metal base; filling the groove with a second plastic body; At least two micro-slits are processed on the metal base, the metal base further includes a second surface opposite to the first surface, and the at least two micro-slots penetrate from the second surface to the concave groove; removing the second plastic body in the groove; A first plastic body is filled in the at least two micro-slots and the groove, and the first plastic body filled in the at least two micro-slots and the groove is connected as a whole; and curing the first plastic body. 2 . The method for manufacturing a casing according to claim 1 , wherein the groove is machined with a conical milling cutter on a CNC machine tool, and the diameter of the conical milling cutter decreases in the direction from the cutter body to the cutter head. 3 . . 3. The shell manufacturing method according to claim 1, wherein the groove is machined with a cylindrical milling cutter on a CNC machine tool, and the cutter head of the cylindrical milling cutter is biased toward the inside of the groove , the blade is biased to the outside of the groove. 4 . The method of manufacturing a casing according to claim 1 , wherein a metal frame strip is formed between two adjacent micro-slits, and before filling the first plastic body, the frame strip is oriented toward The periphery of the end face of the groove is rounded. 5. The manufacturing method of the casing according to claim 1, wherein the filling method of the first plastic body comprises: The dispensing action of the at least two micro-slits and the groove is completed by one dispensing action to form the integrated first plastic body. 6. The shell manufacturing method according to claim 5, wherein the dispensing action comprises: placing the metal base between the glue dispenser and the suction fixture; The glue dispenser dispenses glue on the at least two micro-slots, and the suction jig sucks the plastic glue in the at least two micro-slots; and The glue dispenser dispenses glue to the groove. 7 . The method for manufacturing a shell according to claim 6 , wherein when the metal base is placed between the glue dispenser and the suction jig, the first side faces the surface of the glue dispenser. 8 . For the dispensing head, the second side faces the suction fixture. 8 . The method for manufacturing a shell according to claim 1 , wherein after the first plastic body is cured, a numerical control machine is used to remove the first plastic body overflowing from the second surface and the first surface. 9 . part. 9 . The method of claim 8 , wherein after removing the overflow portion of the first plastic body, surface polishing, sandblasting or anodizing is performed on the second surface of the metal base. 10 . at least one surface treatment. 10. A casing, characterized in that, the casing is manufactured by the method for manufacturing a casing according to any one of claims 1-9, the casing comprises a metal base and a first plastic body, the metal The base body includes a first surface and a second surface that are oppositely arranged, the first surface is provided with a groove, and the second surface is provided with at least two micro-slits spaced apart from each other, and the at least two micro-slits all penetrate to the concave a groove, the first plastic body is filled in the at least two micro-slots and the groove, and the first plastic body filled in the at least two micro-slots and the groove is connected as a whole, so The first plastic body is made of non-signal shielding material; wherein, a frame strip extending along the first direction is formed between two adjacent micro-slits, and each frame strip is provided on the periphery of the end face of the groove. transition to rounded corners. 11. The casing of claim 10, wherein a frame strip extending along a first direction is formed between two adjacent micro-slits, and on a cross section perpendicular to the first direction, The groove has a first opening width on the first surface, and a second opening width is provided on the second surface between the two side walls of the at least two micro-slits that are farthest apart. An opening width is greater than or equal to the second opening width. 12 . The casing of claim 11 , wherein on a cross section perpendicular to the first direction, the groove is a trapezoid, and the long side of the trapezoid is the groove and the The junction line of the first side. 13. A mobile terminal, characterized by comprising the casing according to any one of claims 10-12.

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