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CN-122028345-A - Middle frame structure, preparation method thereof and electronic equipment

CN122028345ACN 122028345 ACN122028345 ACN 122028345ACN-122028345-A

Abstract

The invention provides a middle frame structure, a preparation method thereof and electronic equipment. The middle frame structure comprises a middle frame body and a battery compartment supporting plate, wherein the battery compartment supporting plate is arranged in the middle frame body and forms a battery compartment with the middle frame body, the middle frame body is made of a first material, the battery compartment supporting plate is made of a second material, the first material is the same as or different from the second material, and the middle frame body and the battery compartment supporting plate are metallurgically bonded. The invention solves the problem that the middle frame structure in the prior art is difficult to be light and thin and has structural reliability.

Inventors

  • XIE JINPING
  • LIAO SHASHA
  • YONG HUI
  • NING RUI

Assignees

  • 广州众山新材料股份有限公司

Dates

Publication Date
20260512
Application Date
20260401

Claims (15)

  1. 1. The utility model provides a center structure, its characterized in that includes center main part (10) and battery compartment backup pad (20), battery compartment backup pad (20) set up in center main part (10) and with center main part (10) form battery compartment (11): The middle frame body (10) is made of a first material, the battery compartment support plate (20) is made of a second material, the first material is the same as or different from the second material, and the middle frame body (10) and the battery compartment support plate (20) are metallurgically bonded.
  2. 2. The middle frame structure of claim 1, wherein, The first material is any one material or a composite material of at least any two materials of aluminum alloy, stainless steel, titanium alloy, magnesium alloy, zirconium-based amorphous and particle reinforced metal composite material, and/or The second material is any one material or a composite material of at least any two materials of aluminum alloy, stainless steel, titanium alloy, magnesium alloy, zirconium-based amorphous and particle reinforced metal composite material.
  3. 3. The middle frame structure of claim 1, wherein, The thickness of the middle frame body (10) is 3mm to 10mm, and/or The battery compartment support plate (20) has a thickness of 0.05mm to 0.3mm, and/or The bonding strength between the middle frame main body (10) and the battery compartment supporting plate (20) is 60Mpa to 180Mpa.
  4. 4. The middle frame structure according to claim 1, wherein the middle frame body (10) and the battery compartment support plate (20) are integrally formed as a roll-formed structure or a hot isostatic-pressed structure.
  5. 5. The middle frame structure according to any one of claims 1 to 4, wherein connecting sections (12) are respectively arranged on two sides of the middle frame main body (10), two sides of the battery compartment support plate (20) are respectively connected with two connecting sections (12), and the connecting sections (12) at least cover part of side surfaces of the battery compartment support plate (20) and form metallurgical bonding.
  6. 6. The middle frame structure according to any one of claims 1 to 4, wherein connecting sections (12) are respectively arranged at two sides of the middle frame main body (10), and two sides of the battery compartment supporting plate (20) are respectively lapped on top surfaces of the two connecting sections (12) and form metallurgical bonding.
  7. 7. A method for manufacturing a middle frame structure, wherein the middle frame structure is the middle frame structure of claim 5, the method comprising: Obtaining a composite board (100) by utilizing a rolling process, wherein the composite board (100) comprises a first material layer (101), a second material layer (102) and a separation sheet (103), the second material layer (102) is covered on one side surface of the first material layer (101) in a same shape, a groove is formed on one side surface of the first material layer (101) close to the second material layer (102), the separation sheet (103) is positioned in the groove, the separation sheet (103) is positioned in the peripheral edge range of the first material layer (101) and the second material layer (102), and the composite board (100) is divided into a non-composite area (104) corresponding to the separation sheet (103) and a composite area (105) positioned outside the peripheral edge of the separation sheet (103), wherein the first material layer is made of the first material, and the second material layer is made of the second material; stamping an area covering a non-composite area (104) of the composite sheet material (100) to form a concave area (106); And shaping and heat-treating the punched composite board (100) and then performing CNC processing to obtain the middle frame structure.
  8. 8. The method of claim 7, wherein performing CNC processing to obtain the middle frame structure comprises: And removing the barrier sheet (103) in the concave area (106) and the first material layer (101) corresponding to the barrier sheet (103) through CNC to form the battery compartment (11), and removing the second material layer (102) and the redundant first material layer (101) which are positioned in the area except the concave area (106) to form the connecting section (12), so as to obtain the middle frame structure.
  9. 9. The method for manufacturing a middle frame structure according to claim 7, wherein, The barrier sheet (103) is any one of mica foil, graphite sheet, aluminum alloy foil, copper alloy foil or zinc alloy foil, and/or The surface of the barrier sheet (103) is provided with a passivation film, and the thickness of the barrier sheet (103) is 0.05mm to 0.3mm.
  10. 10. The method for manufacturing a middle frame structure according to claim 7, wherein, The recessed area (106) has a depth of 0.5mm to 2mm, and/or The circumference of the recessed area (106) has a circular arc transition surface with a circular arc radius of 5mm to 10mm, and/or The horizontal distance D between the side edge of the barrier sheet (103) and the bottom periphery of the recessed area (106) is 2mm to 8mm.
  11. 11. A method for manufacturing a middle frame structure, wherein the middle frame structure is the middle frame structure of claim 6, the method comprising: Obtaining a composite board (100) by utilizing a hot isostatic pressing process, wherein the composite board (100) comprises a first material layer (101), a second material layer (102) and a separation sheet (103), a first groove is formed in one side surface of the first material layer (101), a second groove is formed in the bottom of the first groove, the second material layer (102) is positioned in the first groove, the separation sheet (103) is positioned in the second groove, the first groove is positioned in the peripheral edge range of the first material layer (101), the second groove is positioned in the peripheral edge range of the first groove, and the composite board (100) is divided into a non-composite region (104) corresponding to the separation sheet (103) and a composite region (105) positioned between the peripheral edge of the separation sheet (103) and the peripheral edge of the second material layer (102), wherein the first material layer is made of the first material and the second material layer is made of the second material; and performing CNC processing on the composite board (100) after heat treatment to obtain the middle frame structure.
  12. 12. The method of claim 11, wherein performing CNC processing to obtain the middle frame structure comprises: And removing the barrier sheet (103) in the area of the second material layer (102) and the first material layer (101) corresponding to the barrier sheet (103) through CNC to form the battery compartment (11), and removing the redundant first material layer (101) positioned in the area outside the second material layer (102) to form the connecting section (12) to obtain the middle frame structure.
  13. 13. The method for manufacturing a middle frame structure according to claim 11, wherein, The barrier sheet (103) is any one of mica foil, graphite sheet, aluminum alloy foil, copper alloy foil or zinc alloy foil, and/or The surface of the barrier sheet (103) is provided with a passivation film, and the thickness of the barrier sheet (103) is 0.05mm to 0.3mm.
  14. 14. The method of manufacturing a mid-frame structure according to claim 11, wherein the width of the composite zone (105) is 2mm to 8mm.
  15. 15. An electronic device comprising the center structure according to any one of claims 1 to 6, or the center structure produced by the method for producing the center structure according to any one of claims 7 to 14.

Description

Middle frame structure, preparation method thereof and electronic equipment Technical Field The invention relates to the technical field of electronic equipment, in particular to a middle frame structure, a preparation method thereof and electronic equipment. Background With the continuous improvement of living standard, electronic devices such as mobile phones and tablet computers have become an indispensable tool in daily life. Taking a mobile phone as an example, in order to increase the battery bin capacity of the mobile phone and improve the cruising ability of the mobile phone, it is one of important ways to thin the thickness of the battery bin area of the middle frame of the mobile phone. The prior battery compartment area forming scheme of the mobile phone middle frame mainly comprises two steps of firstly forming a middle frame main body and a battery compartment area through CNC (computer numerical control) integration of aluminum alloy plates, and secondly fixing an aluminum-based silicon carbide plate or a carbon fiber plate in a mode of dispensing and screwing of the middle frame main body of the mobile phone to form the battery compartment area. However, for the first solution, since CNC machining of too thin materials can cause deformation and damage to the materials, the current reducible thickness of the battery compartment area is limited, and it is difficult to perform further CNC milling reduction. For the second scheme, the combination reliability between the aluminum alloy middle frame and the aluminum-based silicon carbide board or the carbon fiber board is poor, and under the conditions of mobile phone falling, vibration and extrusion, the aluminum-based silicon carbide board or the carbon fiber board has a falling risk, so that the use reliability of the mobile phone is affected. As described above, the prior art has a problem that the middle frame structure is difficult to be thinned and the structural reliability is difficult to be achieved. Disclosure of Invention The invention mainly aims to provide a middle frame structure, a preparation method thereof and electronic equipment, so as to solve the problem that the middle frame structure in the prior art is difficult to be thinned and has structural reliability. In order to achieve the above object, according to one aspect of the present invention, there is provided a center structure including a center body and a battery compartment support plate disposed within the center body and forming a battery compartment with the center body, wherein the center body is made of a first material, the battery compartment support plate is made of a second material, the first material is the same as or different from the second material, and the center body and the battery compartment support plate are metallurgically bonded. Further, the first material is any one material or a composite material of at least any two materials of aluminum alloy, stainless steel, titanium alloy, magnesium alloy, zirconium-based amorphous and particle reinforced metal composite material, and/or the second material is any one material or a composite material of at least any two materials of aluminum alloy, stainless steel, titanium alloy, magnesium alloy, zirconium-based amorphous and particle reinforced metal composite material. Further, the thickness of the middle frame body is 3mm to 10mm, and/or the thickness of the battery compartment support plate is 0.05mm to 0.3mm, and/or the bonding strength between the middle frame body and the battery compartment support plate is 60Mpa to 180Mpa. Further, the middle frame main body and the battery compartment supporting plate are integrally formed into a rolling forming structure or a hot isostatic pressing structure. Further, the two sides of the middle frame main body are respectively provided with a connecting section, the two sides of the battery compartment supporting plate are respectively connected with the two connecting sections, and the connecting sections at least cover part of the side surfaces of the battery compartment supporting plate and form metallurgical bonding. Further, the two sides of the middle frame main body are respectively provided with a connecting section, and the two sides of the battery compartment supporting plate are respectively lapped on the top surfaces of the two connecting sections and form metallurgical bonding. According to another aspect of the invention, the preparation method of the middle frame structure is provided, the preparation method comprises the steps of obtaining a composite board through a rolling process, wherein the composite board comprises a first material layer, a second material layer and a blocking piece, the second material layer covers one side surface of the first material layer in a conformal mode, a groove is formed in one side surface of the first material layer, which is close to the second material layer, the blocking piece is located in the groove, t