Middle frame component and its application

Abstract

The present invention provides a middle frame assembly and its application. The middle frame assembly includes a metal frame body and a plastic body provided on the metal frame body; the metal frame body includes an annular side wall, the annular side wall includes an inner circumferential surface and an outer circumferential surface, and a plurality of glue pulling structures are provided on the annular side wall. The glue pulling structure includes a buckle groove formed by being recessed from the inner circumferential surface to the outer circumferential surface, and at least one limiting block provided in the buckle groove and disposed away from the bottom side of the buckle groove; the plastic body includes a main body portion attached to the inner circumferential surface of the annular side wall, and a fixing structure that cooperates and connects with the glue pulling structure is formed at a corresponding position of the main body portion, and the fixing structure and the limiting block form a mutual buckling and pulling effect. In the middle frame assembly provided by the present invention, the adhesion between the metal frame body and the plastic body can meet the thrust test of more than 5 kg per square millimeter, and the glue pulling structure provided on the annular side wall is applicable to a thin metal frame wall.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic product accessories, and more specifically, to a middle frame assembly and its application. Background Art

[0002] At present, the middle frame structures of most electronic products adopt a combination of a plastic body and a metal frame. The adhesion between the two affects the waterproof performance, the structural strength of the product itself, the service life, and the anodic oxidation acid spitting process in the product surface treatment process. Therefore, improving the adhesion between the plastic body and the metal frame is of great significance for improving the product quality.

[0003] Currently, the commonly used methods for improving the adhesion between the plastic body and the metal frame include increasing the surface roughness of the metal, improving the adhesion of plastic particles, and setting a glue pulling structure on the metal frame, etc. The existing glue pulling structures include a planar glue pulling structure 40 (as shown in Figure 7 ), and a convex glue pulling structure 50 (as shown in Figure 8 ). The planar glue pulling structure 40 is applicable to the thin-wall part of the metal frame, but usually the adhesion between the metal frame 41 and the plastic body 42 is weak and cannot meet the thrust test of more than 5 kg per square millimeter. The convex glue pulling structure 50 can significantly enhance the adhesion between the metal frame 51 and the plastic body 52, meeting the thrust test of more than 5 kg per square millimeter, but it will also significantly increase the thickness of the metal frame wall, affecting the product antenna signal and increasing the weight of the product itself, etc.

[0004] Therefore, there is an urgent need to provide a new glue pulling structure that can meet the thrust test of more than 5 kg per square millimeter while being applicable to the thin and light metal frame wall. Summary of the Invention

[0005] The purpose of the present invention is to provide a middle frame assembly and its application. A number of new glue pulling structures are provided on the metal frame of the middle frame assembly to solve the problem that the existing glue pulling structures cannot simultaneously meet the thrust test of more than 5 kg per square millimeter and the thin and light metal frame wall.

[0006] To solve the above technical problems, the present invention provides a middle frame assembly, which includes a metal frame body and a plastic body provided on the metal frame body. The metal frame body includes an annular side wall, and the annular side wall includes an inner circumferential surface and an outer circumferential surface. A plurality of glue pulling structures are provided on the annular side wall. The glue pulling structure includes a buckle groove recessed from the inner circumferential surface towards the outer circumferential surface, and at least one limiting block provided in the buckle groove and away from the bottom side of the buckle groove; the plastic body includes a main body portion attached to the inner circumferential surface of the annular side wall, and a fixing structure matching with the glue pulling structure is formed at a corresponding position of the main body portion. The fixing structure and the limiting block form a mutual buckling effect.

[0007] Preferably, the buckle groove includes a first joint surface and a second joint surface arranged at intervals, and a third joint surface connecting the first joint surface and the second joint surface. The limiting block is provided on the first joint surface and / or the second joint surface, and the limiting block is arranged at an interval from the third joint surface.

[0008] Preferably, the glue pulling structure includes two limiting blocks arranged at intervals. One of the two limiting blocks is provided on the first joint surface, and the other is provided on the second joint surface.

[0009] Preferably, the fixing structure includes a fixing portion matching the shape of the buckle groove, and a receiving groove is recessed at a corresponding position of the fixing portion; after the glue pulling structure and the fixing structure are cooperatively connected, the limiting block is arranged in the receiving groove to form a mutual buckling effect with the fixing portion.

[0010] Preferably, a honeycomb-shaped uneven area is formed on the third joint surface; and / or

[0011] a honeycomb-shaped uneven area is formed on the second joint surface; and / or

[0012] a honeycomb-shaped uneven area is formed on the first joint surface.

[0013] Preferably, both the buckle groove and the limiting block are in a semi-cylindrical structure.

[0014] Preferably, the metal frame body further includes a panel, and at least part of the four peripheral edges of the panel are connected to the inner circumferential surface.

[0015] Preferably, the panel and the annular side wall are integrally formed.

[0016] To further solve the above technical problems, the present invention also provides an application of the above-mentioned middle frame assembly as an outer shell of an electronic product.

[0017] Preferably, the electronic product is a mobile phone or a tablet computer.

[0018] Compared with the prior art, the middle frame assembly provided by the present invention includes a metal frame body and a plastic body provided on the metal frame body; the metal frame body includes an annular side wall, the annular side wall includes an inner circumferential surface and an outer circumferential surface, and a plurality of glue pulling structures are provided on the annular side wall. The glue pulling structure includes a buckle groove recessed from the inner circumferential surface to the outer circumferential surface direction, and at least one limiting block provided in the buckle groove and away from the bottom side of the buckle groove; the plastic body includes a main body portion attached to the inner circumferential surface of the annular side wall, and a fixing structure cooperating with the glue pulling structure is formed at a corresponding position of the main body portion, and the fixing structure and the limiting block form a mutual buckling and pulling effect. By the above method, the adhesion between the metal frame body and the plastic body can be enhanced, and the thrust test of more than 5 kg per square millimeter can be satisfied. In addition, the glue pulling structure is arranged inside the annular side wall. Compared with the convex glue pulling structure, it can avoid interfering with and blocking signal transmission; at the same time, as long as the depression degree of the buckle groove and the size of the limiting block are controlled within a suitable range, it can be applied to the thin metal frame wall. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of a middle frame assembly in an embodiment of the present invention;

[0020] Figure 2 is Figure 1 a schematic exploded view of the middle frame assembly shown;

[0021] Figure 3 is Figure 2 an enlarged view of part B in

[0022] Figure 4 is Figure 2 a schematic cross-sectional view in the A-A direction in

[0023] Figure 5 is another schematic structural diagram of the plastic body in the middle frame assembly in an embodiment of the present invention;

[0024] Figure 6 is Figure 5 an enlarged view of part C in

[0025] Figure 7 is a schematic diagram of a planar glue pulling structure in the prior art;

[0026] Figure 8 is a schematic diagram of a convex glue pulling structure in the prior art. Detailed Embodiment

[0027] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Please refer to Figure 1-2 , as shown in FIG. 5, an embodiment of the present invention provides a middle frame assembly 100, and the middle frame assembly 100 includes a metal frame body 10 and a plastic body 20 provided on the metal frame body 10. Specifically, the metal frame body 10 includes an annular side wall 11, the annular side wall 11 includes an inner peripheral surface 111 and an outer peripheral surface 112, and a plurality of glue pulling structures 113 are provided on the annular side wall 11. Combining Figure 3-4 as shown, the glue pulling structure 113 includes a buckle groove 1131 formed by recessing from the inner peripheral surface 111 to the outer peripheral surface 112, and at least one limiting block 1132 provided in the buckle groove 1131 and disposed away from the bottom e side of the buckle groove 1131. The plastic body 20 includes a main body portion 21 attached to the inner peripheral surface 111 of the annular side wall 11, and a fixing structure 211 cooperating with the glue pulling structure 113 is formed at a corresponding position of the main body portion 21, and the fixing structure 211 and the limiting block 1132 form a mutual buckling and pulling effect. Through this mutual buckling and pulling effect, the adhesion between the metal frame body 10 and the plastic body 20 can be enhanced, so that the pulling force between the two is increased to more than 5 kg per square millimeter. In addition, the glue pulling structure 113 is provided between the inner peripheral surface 111 and the outer peripheral surface 112 of the annular side wall 11. Compared with the convex glue pulling structure 50, it can avoid interfering with and blocking the signal emission; at the same time, as long as the recessed depth of the buckle groove 1131 and the size of the limiting block 1132 are controlled within a suitable range, the glue pulling structure 113 can be applied to a thin metal frame wall.

[0029] It should be noted that when setting the glue pulling structure 113 on the annular side wall 11 of the metal frame body 10, it is necessary to consider the assembly positions and spaces required by other components, as well as problems such as signal emission shielding and interference. Therefore, the number and position of the glue pulling structure 113 are set according to actual needs. As shown in Figure 2 this embodiment, 3 glue pulling structures 113 are arranged at intervals on one side wall of the metal frame body 10, without increasing the thickness of this side wall, and the adhesion between the metal frame body 10 and the plastic body 20 can be enhanced.

[0030] Preferably, the glue pulling structures 113 are evenly distributed at equal intervals.

[0031] More preferably, the sizes of the glue pulling structures 113 are the same.

[0032] Further, please refer toFigure 5-6 As shown Figure 5 is another schematic structural view of the plastic body in the frame assembly in an embodiment of the present invention. The plastic body 20a includes a main body portion 21a attached to the inner peripheral surface 111 of the annular side wall 11. A fixing structure 211a cooperating with the glue pulling structure 113 is formed at a corresponding position of the main body portion 21a. The fixing structure 211a includes a fixing portion 2111a matching the shape of the buckling groove 1131. A receiving groove 2112a is recessed at a corresponding position of the fixing portion 2111a. After the glue pulling structure 113 is cooperatively connected with the fixing structure 211a, the limiting block 1132 is disposed in the receiving groove 2112a to form an interlocking pulling action with the fixing portion 2111a.

[0033] Further, please refer to Figure 3-4 As shown, the buckling groove 1131 includes a first joint surface 1131a and a second joint surface 1131b which are spaced apart, and a third joint surface 1131c connecting the first joint surface 1131a and the second joint surface 1131b. The limiting block 1132 is disposed on the first joint surface 1131a and / or the second joint surface 1131b, and the limiting block 1132 is spaced apart from the third joint surface 1131c.

[0034] Preferably, the first joint surface 1131a and the second joint surface 1131b are relatively parallel to each other, and the third joint surface 1131c is an arc surface, so that the buckling groove 1131 has a semi-cylindrical structure, as shown in this embodiment. In other embodiments of the present invention, the third joint surface 1131c may also be formed by sequentially connecting several surfaces, preferably 3 surfaces, so that the buckling groove 1131 has a cuboid structure or a cube structure. It should be noted that the buckling groove 1131 with a semi-cylindrical structure can reduce the depth of the two ends recessing towards the outer peripheral surface 112 compared with the buckling groove 1131 with a cuboid structure, thereby ensuring the strength of the annular side wall 11 to a greater extent.

[0035] Preferably, in this embodiment, as Figure 2-4As shown, the glue pulling structure 113 includes two limiting blocks 1132 arranged at intervals. One of the two limiting blocks 1132 is arranged on the first joint surface 1131a, and the other is arranged on the second joint surface 1131b. Receiving grooves 2112a are respectively formed at corresponding positions of the fixing part 2111a. After the glue pulling structure 113 is cooperatively connected with the fixing structure 211a, the limiting blocks 1132 are respectively arranged in the adjacent receiving grooves 2112a to form an interlocking pulling effect with the fixing part 2111a. By arranging two limiting blocks 1132 at intervals, the adhesion distribution between the plastic body 20a and the metal frame 10 can be balanced, so that a greater thrust can be withstood in the thrust test.

[0036] Preferably, the two limiting blocks 1132 have the same structure. At this time, the glue pulling structure 113 forms an I-shaped structure on the inner peripheral surface 111.

[0037] Preferably, the limiting block 1132 and the buckling groove 1131 have the same structure, such as both being semi-cylindrical structures. In other embodiments of the present invention, the limiting block 1132 and the buckling groove 1131 may also both be triangular prism structures. When the buckling groove 1131 is also a semi-cylindrical structure, it can be formed by one-time processing with a customized milling cutter, improving the processing efficiency.

[0038] Optionally, in other embodiments of the present invention, the glue pulling structure 113 only includes one limiting block 1132. One end of the limiting block 1132 is connected to the first joint surface 1131a, and the other end is connected to the second joint surface 1131b. This form of glue pulling structure 113 can provide a stronger interlocking pulling effect between the metal frame 10 and the plastic body 20, but the processing difficulty is greater than that of the glue pulling structure 113 shown in this embodiment.

[0039] It should be noted that the glue pulling structure 113 in the present invention is not limited to the forms described in the above two embodiments. For example, a number of smaller limiting blocks 1132 are arranged on the first joint surface 1131a, and a number of smaller limiting blocks 1132 are also arranged at corresponding positions on the second joint surface 1131b, etc. It can be understood that these all belong to the protection scope of the present invention. For the sake of simplicity, they will not be elaborated here.

[0040] Preferably, the limiting block 1132 includes a first surface 1132a, and the first surface 1132a is in the same plane as the inner peripheral surface 111, such as in this embodiment Figure 3-4As shown. By this setting method, when the thickness of the limit block 1132 is the same, the depth of the buckle groove 1131 recessed toward the outer peripheral surface 112 can be reduced, which is beneficial to making the annular side wall 11 thinner and lighter. At the same time, this setting method can reduce the processing steps for forming the limit block 1132 and simplify the processing technology.

[0041] In order to further enhance the adhesion between the metal frame 10 and the plastic body 20a, preferably, in other embodiments of the present invention, a honeycomb-shaped uneven area is formed on the third joint surface 1131c, and a honeycomb-shaped uneven area is correspondingly formed at the connection position of the fixing portion 2111a and the third joint surface 1131c, so as to improve the adhesion between the metal frame 10 and the plastic body 20a. More preferably, a honeycomb-shaped uneven area is formed on the second joint surface 1131b, and a honeycomb-shaped uneven area is correspondingly formed at the connection position of the fixing portion 2111a and the second joint surface 1131b; more preferably, a honeycomb-shaped uneven area is formed on the first joint surface 1131a, and a honeycomb-shaped uneven area is correspondingly formed at the connection position of the fixing portion 2111a and the first joint surface 1131a.

[0042] In the present invention, the honeycomb-shaped uneven areas formed on each joint surface can be obtained by any suitable method in the art. Preferably, they are obtained by laser texturing or E treatment.

[0043] Furthermore, in this embodiment, as Figure 2 , shown in FIG. 4, the metal frame 10 further includes a panel 12, and at least part of the four peripheral edges of the panel 12 are connected to the inner peripheral surface 111.

[0044] Preferably, the panel 12 and the annular side wall 11 are integrally formed.

[0045] For the middle frame assembly 100 provided by the embodiment of the present invention, due to the high adhesion between the metal frame 10 and the plastic body 20, it has more excellent waterproof performance, structural strength and longer service life; at the same time, due to the advantage of the metal frame 10 being thinner and lighter, the middle frame assembly 100 of the present invention is also made thinner and lighter.

[0046] Furthermore, the present invention also provides an application of using the above-mentioned middle frame assembly 100 as the housing of an electronic product. The housing of the electronic product has excellent waterproof performance, structural strength and longer service life due to the use of the above-mentioned middle frame assembly 100, and is also thinner and lighter at the same time.

[0047] Preferably, the electronic product can be a 3C product such as a mobile phone, a notebook computer or a tablet computer.

[0048] The above are only the embodiments of the present invention. It should be noted here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all fall within the protection scope of the present invention.

Claims

1. A middle frame component, which includes a metal frame body and a plastic body provided on the metal frame body, and is characterized in that, The metal housing includes an annular side wall, the annular side wall includes an inner peripheral surface and an outer peripheral surface, and a plurality of glue pulling structures are provided on the annular side wall. The glue pulling structure includes a buckle groove recessed from the inner peripheral surface towards the outer peripheral surface, and at least one limiting block provided in the buckle groove and disposed away from the bottom side of the buckle groove; the plastic body includes a main body portion attached to the inner peripheral surface of the annular side wall, and a fixing structure for cooperating with the glue pulling structure is formed at a corresponding position of the main body portion, and the fixing structure and the limiting block form a mutual buckling effect.

2. The middle frame assembly according to claim 1, wherein The buckle groove includes a first joint surface and a second joint surface arranged at intervals, and a third joint surface connecting the first joint surface and the second joint surface. The limiting block is disposed on the first joint surface and / or the second joint surface, and the limiting block is spaced from the third joint surface.

3. The middle frame assembly according to claim 2, wherein The glue pulling structure includes two limiting blocks arranged at intervals. One of the two limiting blocks is disposed on the first joint surface, and the other is disposed on the second joint surface.

4. The middle frame assembly according to any one of claims 1-3, characterized in that, The fixing structure includes a fixing portion matching the shape of the buckle groove, and a receiving groove is recessed at a corresponding position of the fixing portion; after the glue pulling structure and the fixing structure are cooperatively connected, the limiting block is disposed in the receiving groove to form a mutual buckling effect with the fixing portion.

5. The middle frame assembly according to claim 2 or 3, characterized in that, A honeycomb-shaped uneven area is formed on the third joint surface; and / or A honeycomb-shaped uneven area is formed on the second joint surface; and / or A honeycomb-shaped uneven area is formed on the first joint surface.

6. The middle frame assembly according to any one of claims 1-3, characterized in that, Both the buckle groove and the limiting block are in a semi-cylindrical structure.

7. The middle frame assembly according to any one of claims 1-3, characterized in that, The metal housing further includes a panel, and at least part of the four peripheral edges of the panel is connected to the inner peripheral surface.

8. The middle frame assembly according to claim 7, wherein, The panel and the annular side wall are integrally formed.

9. The housing of an electronic product, characterized in that, Including the middle frame assembly according to any one of claims 1-8.

10. The housing of the electronic product according to claim 9, characterized in that, The electronic product is a mobile phone or a tablet computer.

Images