A mobile phone case

Abstract

The application relates to a mobile phone shell which comprises a middle plate and a frame assembled to the periphery of the middle plate, and the joint surface of the middle plate and the frame is connected through a multi-stage connecting structure; the multi-stage connecting structure comprises a guide structure, a positioning structure and a welding structure which are dispersedly arranged on the periphery of the mobile phone shell; the guide structure comprises a guide groove arranged on the middle plate component and a guide protrusion arranged on the frame component and matched with the guide groove; and the positioning structure comprises a first positioning groove arranged on the middle plate component and a second positioning groove arranged on the frame component and clamped with the first positioning groove. The mobile phone shell has the advantages of stable installation, low production cost, high yield and rapid assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile phone parts, in particular to a mobile phone shell. BACKGROUND

[0002] With the development of science and technology, the mobile phone manufacturing process is rapidly developing in the industry, and it is no longer a technical problem to quickly manufacture and sell mobile phones with similar appearances. As a result, the product structure and manufacturing process are similar, and the price competition of mobile phones with similar appearance and similar performance has become an important profit point, leading to the white-hot stage of mobile phone manufacturing cost competition. In view of this, how to control the mobile phone shell with low production cost while having stability has become a difficult problem to overcome. SUMMARY

[0003] The purpose of the present application is to solve the above problems, and to provide a mobile phone shell with installation stability, low production cost, high yield and fast assembly.

[0004] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] A mobile phone shell includes a middle plate and a frame assembled around the middle plate, and the combination surface of the middle plate and the frame is connected by a multi-stage connection structure; the multi-stage connection structure includes a guide structure, a positioning structure and a welding structure dispersed around the mobile phone shell.

[0006] Preferably, the middle plate includes a middle plate body and a middle plate member wrapped around the outside of the middle plate body, and the frame includes an extrusion-molded frame body and a frame member arranged around the inside of the frame body.

[0007] Preferably, the guide structure includes a guide groove on the middle plate member and a guide protrusion on the frame member that fits with the guide groove.

[0008] Preferably, the guide groove includes two tooth-shaped grooves arranged side by side, and the guide protrusion includes a tooth-shaped protrusion that matches the tooth-shaped groove, the draft angle of the connection surface between the guide groove and the guide protrusion is 0.5-2°, and the gap between the transverse connection surface of the guide groove and the guide protrusion is 0.03-0.05mm.

[0009] Preferably, the positioning structure comprises a first positioning groove arranged on the middle plate member and a second positioning groove arranged on the frame member and engaged with the first positioning groove, the first positioning groove comprises a first groove side arranged on the outer side of the middle plate member, a second groove side arranged on the inner side of the middle plate member and a first groove bottom connected to the end of the first groove side and the second groove side, and the second positioning groove comprises a third groove side arranged on the inner side of the frame member, a fourth groove side arranged on the outer side of the frame member and a second groove bottom connected to the end of the third groove side and the fourth groove side.

[0010] Preferably, the first groove bottom is connected with the fourth groove side with a gap of 0.5-0.1mm, the second groove bottom is connected with the first groove side with a gap of 0.5-0.1mm, the outer side of the second groove side is connected with the inner side of the fourth groove side with a gap of 0.06-0.07mm, the draft angle of the side of the second groove side away from the first groove bottom is 1-2°, the draft angle of the side of the second groove side close to the first groove bottom is 3-4°, and the gap between the contact area of the first groove side and the fourth groove side is not more than 0.03mm.

[0011] Preferably, the upper side and the lower side of the middle plate body are respectively provided with a plurality of first protrusions protruding from the middle plate member, the frame body is provided with a plurality of second protrusions protruding from the frame member at positions corresponding to the first protrusions, and the first protrusions and the second protrusions are welded to form the welding structure.

[0012] Preferably, a welding groove is arranged on the first protrusion, the second protrusion overlaps the bottom edge of the welding groove, the difference between the upper surface of the first protrusion and the upper surface of the second protrusion is 0.5-0.1mm, and the gap between the second protrusion and the side edge of the welding groove is 0.05-0.12mm.

[0013] Preferably, the welding surfaces of the first protrusion and the second protrusion are planar surfaces processed by CNC.

[0014] Preferably, the mobile phone shell further comprises a volume adjustment hole and a lock screen key hole arranged on the first side of the mobile phone shell, a charging hole and a loudspeaker hole arranged on the bottom edge of the mobile phone shell, and a telephone card insertion hole arranged on the top edge of the mobile phone shell.

[0015] The beneficial effects of the present application at least include:

[0016] 1. The mobile phone casing of the present invention can be disassembled into a middle plate and a frame for separate manufacturing. The manufactured middle plate and frame are quickly positioned and tightly assembled through a multi-level connection structure. The separate manufacturing of the parts allows the middle plate and frame to be processed and manufactured separately, which speeds up the manufacturing speed of the mobile phone casing and increases the production efficiency of the mobile phone casing. The multi-level connection structure, in which the middle plate and frame are connected by three connection structures, namely a guiding structure, a positioning structure and a welding structure, ensures that the middle plate and frame are quickly positioned and tightly connected to each other, which enhances the assembly stability between the middle plate and the frame.

[0017] 2. The middle plate of the present invention includes a middle plate body and a middle plate component injection molded on the middle plate body. The frame includes a frame body and a frame component injection molded on the frame body. The middle plate body and the frame body are made of metal material. The mobile phone shell includes both metal components and injection molded plastic components, which reduces the production cost of the mobile phone shell and enables the mobile phone shell of the present invention to maintain an advantage in the price war of mobile phone products. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the mobile phone casing of the present invention.

[0019] Figure 2 This is a schematic diagram of the main body of the middle plate.

[0020] Figure 3 This is a schematic diagram of the middle plate.

[0021] Figure 4 This is a schematic diagram of the border.

[0022] Figure 5 This is a schematic diagram of the guide structure.

[0023] Figure 6 This is a schematic diagram of the positioning structure.

[0024] Figure 7 This is a schematic diagram of the welded structure.

[0025] Wherein, 1 is the middle plate, 11 is the middle plate body, 111 is the first protrusion, 1111 is the welding groove, 12 is the middle plate component, 2 is the frame, 21 is the frame body, 211 is the second protrusion, 22 is the frame component, 3 is the guide structure, 31 is the guide groove, 32 is the guide protrusion, 4 is the positioning structure, 41 is the first positioning groove, 411 is the first groove shoulder, 412 is the second groove shoulder, 413 is the first groove bottom, 42 is the second positioning groove, 421 is the third groove shoulder, 422 is the fourth groove shoulder, 423 is the second groove bottom, 5 is the welding structure, 100 is the mobile phone shell, 101 is the first side, 102 is the second side, 103 is the top edge, 104 is the bottom edge, 105 is the volume adjustment hole, 106 is the lock screen key hole, 107 is the charging hole, 108 is the loudspeaker hole, 109 is the phone card insertion hole. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0027] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] In addition, the description such as "first", "second", "third", and "fourth" and the like in the present application are only for the purpose of description and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features.

[0030] Example 1

[0031] Figure 1 The overall schematic diagram of the mobile phone shell of the present application is shown in Figure 1 The mobile phone shell includes a middle plate 1 and a frame 2 assembled around the middle plate 1, and the combination surface of the middle plate 1 and the frame 2 is connected by a multi-stage connecting structure. The multi-stage connecting structure includes a guide structure 3, a positioning structure 4, and a welding structure 5 dispersed around the mobile phone shell 100.

[0032] Figure 2 is a schematic view of the middle plate body, Figure 3 is a schematic view of the middle plate, as Figure 2 and Figure 3 As shown in the figure, the middle plate 1 comprises a middle plate body 11 and a middle plate component 12 which is injection molded on the outer periphery of the middle plate body 11. Figure 4 is a schematic view of the frame, as Figure 4 As shown in the figure, the frame 2 comprises an extrusion-molded frame body 21 and a frame component 22 which is injection molded on the inner periphery of the frame body 21. The middle plate 1 is die-cast so that the size precision and surface finish of the obtained middle plate body 11 are high, and the generation of burrs during the molding process of the middle plate body 11 is avoided, thereby reducing the use of CNC machining process and saving the time for reshaping the middle plate body 11, and further reducing the overall production cost of the mobile phone shell and improving the production efficiency. When the middle plate 1 is die-cast, the structure formed further comprises a receiving groove for accommodating electrical components, which include a camera, a light supplement lamp, a mobile phone antenna, a fingerprint unlocker, a memory card, a charger circuit, a receiver, etc.

[0033] The middle plate body 11 and the frame 2 are made of lightweight metal materials, which include aluminum alloy and magnesium alloy. As a preferred embodiment, the middle plate body 11 is made of aluminum alloy, and the frame body 21 is made of magnesium alloy.

[0034] Figure 5 is a schematic view of the guide structure, as Figure 5 As shown in the figure, the guide structure 3 comprises a guide groove 31 provided on the middle plate component 12 and a guide protrusion 32 provided on the frame component 22 and engaged with the guide groove 31.

[0035] The guide groove 31 includes two toothed grooves arranged side by side. Correspondingly, the guide protrusion 32 includes toothed protrusions that mate with the toothed grooves. The draft angle between the connecting surfaces of the guide groove 31 and the guide protrusion 32 is 0.5-2°, preferably 2°. This draft angle facilitates the rapid connection between the guide groove 31 and the guide protrusion 32. The gap between the vertical connecting surfaces of the guide groove 31 and the guide protrusion 32 is 0.1-0.15mm, preferably 0.15mm. This gap prevents mutual interference between the guide groove 31 and the guide protrusion 32, increasing the assembly stability of the guide structure 3. The gap between the transverse connecting surfaces of the guide groove 31 and the guide protrusion 32 is 0.03-0.05mm, preferably 0.05mm. This gap ensures that the guide groove 31 and the guide protrusion 32 can fit together and be tightly connected, further ensuring a tight and stable connection between the middle plate 1 and the frame 2.

[0036] Alternatively, the guide groove 31 includes a toothed groove, and the guide protrusion 32 includes a toothed protrusion corresponding to a toothed groove.

[0037] Figure 6 This is a schematic diagram of the positioning structure, as shown below. Figure 6 As shown, the positioning structure 4 includes a first positioning groove 41 disposed on the middle plate member 12 and a second positioning groove 42 disposed on the frame member 22 and engaging with the first positioning groove 41. The first positioning groove 41 includes a first groove side 411 disposed on the outer side of the middle plate member 12, a second groove side 412 disposed on the inner side of the middle plate member 12, and a first groove bottom 413 connecting the ends of the first groove side 411 and the second groove side 412. The second positioning groove 42 includes a third groove side 421 disposed on the inner side of the frame member 22, a fourth groove side 422 disposed on the outer side of the frame member 22, and a second groove bottom 423 connecting the ends of the third groove side 421 and the fourth groove side 422. It should be noted that the inner side refers to the side away from the frame body, and the outer side refers to the side closer to the frame body.

[0038] The first groove bottom 413 is connected to the fourth groove side 422 with a gap of 0.05-0.1mm, and the second groove bottom 423 is connected to the first groove side 411 with a gap of 0.05-0.1mm, preferably 0.1mm. A gap is provided between the contact surfaces of the first groove bottom 413 and the second groove bottom 423 and their corresponding groove sides to prevent interference between the first positioning groove 41 and the second positioning groove 42. The outer side of the second groove 412 is connected to the inner side of the fourth groove 422 with a gap of 0.06-0.07mm, preferably 0.07mm. The draft angle of the second groove 412 away from the first groove bottom 413 is 1-2°, preferably 1°. The draft angle of the second groove 412 near the first groove bottom 413 is 3-4°, preferably 3°. The gap between the contact areas of the first groove 411 and the fourth groove 422 is no greater than 0.03mm, so as to ensure that the first positioning groove 41 and the second positioning groove 42 can fit tightly and be stably connected. The gap is preferably 0.03mm, which further ensures that the middle plate 1 and the frame 2 can be tightly and stably combined.

[0039] Figure 7 This is a schematic diagram of the welded structure, as shown below. Figure 7 As shown, the upper and lower sides of the middle plate body 11 are respectively provided with a plurality of first protrusions 111, the first protrusions 111 protruding from the middle plate component 12, and the frame body 21 is provided with a second protrusion 211 protruding from the frame component 22 at the corresponding position of the first protrusions 111. The first protrusions 111 and the second protrusions 211 are welded to form the welded structure 5.

[0040] Reference Figure 7 The first protrusion 111 has a welding groove 1111 for easy welding. The second protrusion 211 overlaps the bottom edge of the welding groove 1111. The height difference between the upper surface of the first protrusion 111 and the upper surface of the second protrusion 211 is 0.5-0.1mm, preferably 0.1mm. The height difference is formed because the upper surface of the first protrusion 111 is higher than the upper surface of the second protrusion 211 or because the upper surface of the first protrusion 111 is lower than the upper surface of the second protrusion 211. The gap between the second protrusion 211 and the side of the welding groove 1111 is 0.05-0.12mm, preferably 0.12mm.

[0041] The welding surfaces of the first protrusion 111 and the second protrusion 211 are CNC-processed planes. CNC surface treatment of the welding surfaces of the first protrusion 111 and the second protrusion 211 improves the flatness of the welding surfaces and increases the bonding strength of the weld.

[0042] The gap between the bottom of the middle plate member 12 and the bottom of the frame body 21 is 0.03-0.05mm.

[0043] Referring to Figure 1 The mobile phone shell 100 comprises a first side edge 101 and a second side edge 102 arranged in parallel, and a top edge 103 and a bottom edge 104 arranged in parallel between the first side edge 101 and the second side edge 102. The mobile phone shell further comprises a volume adjustment hole 105 and a lock screen key hole 106 arranged on the first side edge 101 of the mobile phone shell, a charging hole 107 and a loudspeaker hole 108 arranged on the bottom edge 104 of the mobile phone shell, and a phone card insertion hole 109 arranged on the top edge 103 of the mobile phone shell.

[0044] As preferred, a positioning structure 4 is arranged at the corner of the mobile phone shell 100, which plays a supporting and protecting role, and plays a buffering role when the mobile phone falls, thereby relieving the damage of impact on the corner of the mobile phone shell 100. The multi-stage connection structure arranged on the first side edge 101 avoids the volume adjustment hole 105 and the lock screen key hole 106, and at least comprises the positioning structure 4 arranged on both sides of the volume adjustment hole 105 and the lock screen key hole 106. The guiding structure 3 and the positioning structure 4 are arranged on the second side edge 102 in a spaced manner, and are uniformly dispersed on the second side edge 102. The multi-stage connection structure arranged on the top edge 103 avoids the phone card insertion hole 109. The multi-stage connection structure arranged on the bottom edge 104 avoids the charging hole 107 and the loudspeaker hole 108, and at least comprises the positioning structure 4 arranged on the top edge 103 and the bottom edge 104.

[0045] The manufacturing process of the mobile phone shell comprises the following steps:

[0046] The mobile phone shell is divided into a middle plate 1 and a frame 2, which are independently manufactured and formed, and then the manufactured middle plate 1 and frame 2 are assembled, and the middle plate 1 and the frame 2 are stably connected under the action of the guiding structure 3 and the positioning structure 4.

[0047] S1 middle plate manufacturing: the middle plate body 11 is obtained by pressure casting, then the middle plate member 12 is injected on the middle plate body 11 by injection molding, and then the middle plate 1 is obtained after CNC processing;

[0048] S2 frame manufacturing: the frame profile is once CNC processed to obtain the frame body 21, then the frame member 22 is injected on the frame body 21 by injection molding, and then the frame 2 is obtained after secondary CNC processing;

[0049] S3 assembly: the middle plate 1 and the frame 2 manufactured independently in steps S1 and S2 are assembled to obtain the mobile phone shell.

[0050] Before step S3 assembly, the middle plate 1 and the frame 2 manufactured independently in steps S1 and S2 are anodized to form a protective film on the surface of the middle plate 1 and the frame 2, prolonging the service life of the mobile phone shell.

[0051] In step S3 assembly, the first protrusion 111 and the second protrusion 211 are welded in conduction, the guide groove 31 and the guide protrusion 32 are connected in cooperation, and the first positioning groove 41 and the second positioning groove 42 are connected in cooperation. The middle plate 1 and the frame 2 are tightly connected through the multi-level connection structure, ensuring the stability of the mobile phone shell.

[0052] According to the structural characteristics of the mobile phone shell of the present application, the mobile phone shell is divided into a middle plate and a frame during manufacturing, and is assembled after being respectively processed and formed,

[0053] After the middle plate body and the frame body are processed and formed, the middle plate member and the frame member are respectively injection molded, and the middle plate and the frame can be manufactured on two independent production lines. In the present application, the middle plate body is manufactured by die casting, so that the size precision of the middle plate body is high, and the surface finish is good, avoiding burr generation, reducing the use of CNC machining process, shortening the CNC machining time and saving the time of the middle plate body shaping, greatly reducing the production cycle of the mobile phone shell, and reducing the CNC machining cost, thereby reducing the processing cost of the mobile phone shell and improving the production efficiency.

[0054] The single CNC machining cost of the manufacturing process of the present application is reduced by more than 50%, and the overall machining process time is about 35 minutes, greatly reducing the manufacturing cost of the mobile phone shell and saving the production time, and improving the production efficiency.

[0055] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0056] The above embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A cell phone case, characterized by: The mobile phone shell comprises a middle plate and a frame assembled around the middle plate, and the joint surface of the middle plate and the frame is connected by a multi-stage connecting structure; the multi-stage connecting structure comprises a guide structure, a positioning structure and a welding structure which are arranged around the mobile phone shell; The middle plate comprises a middle plate body and a middle plate component wrapped around the outer circumference of the middle plate body, and the middle plate component is injection molded on the middle plate body; the frame comprises an extruded frame body and a frame component arranged around the inner circumference of the frame body, and the frame component is injection molded on the frame body; the corner of the mobile phone shell is provided with a positioning structure; The manufacturing process of the mobile phone shell comprises the following steps: S1: manufacturing the middle plate by pressure casting to obtain a middle plate body, then injection molding a middle plate component on the middle plate body, and then obtaining the middle plate through CNC processing; S2: manufacturing the frame by once CNC processing of a frame profile to obtain a frame body, then injection molding a frame component on the frame body, and then obtaining the frame through twice CNC processing; S3: assembling the middle plate and the frame manufactured independently in steps S1 and S2 to obtain the mobile phone shell.

2. The cell phone case of claim 1, wherein: The guide structure comprises a guide groove arranged on the middle plate component and a guide protrusion arranged on the frame component and matched with the guide groove.

3. The cell phone case of claim 2, wherein: The guide groove comprises two tooth-shaped grooves arranged side by side, and the guide protrusion comprises a tooth-shaped protrusion matched with the tooth-shaped groove; the draft angle of the connecting surface of the guide groove and the guide protrusion is 0.5-2°, and the gap between the transverse connecting surfaces of the guide groove and the guide protrusion is 0.03-0.05mm.

4. The cell phone case of claim 1, wherein: The positioning structure comprises a first positioning groove arranged on the middle plate component and a second positioning groove arranged on the frame component and matched with the first positioning groove; the first positioning groove comprises a first groove side arranged on the outer side of the middle plate component, a second groove side arranged on the inner side of the middle plate component, and a first groove bottom connected to the end of the first groove side and the second groove side; the second positioning groove comprises a third groove side arranged on the inner side of the frame component, a fourth groove side arranged on the outer side of the frame component, and a second groove bottom connected to the end of the third groove side and the fourth groove side.

5. The cell phone case of claim 4, wherein: The first groove bottom and the fourth groove side are matched and connected with a gap of 0.5-0.1mm, the second groove bottom and the first groove side are matched and connected with a gap of 0.5-0.1mm, the outer side of the second groove side and the inner side of the fourth groove side are connected with a gap of 0.06-0.07mm, the draft angle of the side of the second groove side away from the first groove bottom is 1-2°, the draft angle of the side of the second groove side close to the first groove bottom is 3-4°, and the gap between the contact area of the first groove side and the fourth groove side is not greater than 0.03mm.

6. The cell phone case of claim 1, wherein: The upper side and the lower side of the middle plate body are respectively provided with a plurality of first protrusions, the first protrusions protrude from the middle plate component, the frame body is provided with a second protrusion protruding from the frame component at a position corresponding to the first protrusion, and the first protrusion and the second protrusion are welded to form the welding structure.

7. The cell phone case of claim 6, wherein: The first protrusion is provided with a welding groove, the second protrusion overlaps the bottom edge of the welding groove, the difference between the upper surface of the first protrusion and the upper surface of the second protrusion is 0.5-0.1 mm, and the gap between the second protrusion and the side edge of the welding groove is 0.05-0.12 mm.

8. The cell phone case of claim 6, wherein: The welding surfaces of the first protrusion and the second protrusion are CNC processed planes.

9. The cell phone case of claim 1, wherein: The mobile phone shell further comprises a volume adjustment hole and a lock screen key hole arranged on the first side edge of the mobile phone shell, a charging hole and a loudspeaker hole arranged on the bottom edge of the mobile phone shell, and a telephone card insertion hole arranged on the top edge of the mobile phone shell.

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