Method for manufacturing a middle frame for mobile terminal and mobile terminal with a middle frame

Patent metadata

Field	Value
Publication number	US-10821494-B2
Application number	US-201816156034-A
Country	US
Kind code	B2
Filing date	Oct 10, 2018
Priority date	Nov 10, 2017
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

The present disclosure provides a method for manufacturing a middle frame for mobile terminal and a mobile terminal with a middle frame. The method may include: providing a metal plate; forming a number of elongated protrusions arranged in parallel on the plate, the elongated protrusions each extending along a length direction of the metal plate; forming a tubular blank by bending the metal plate such that each of the elongated protrusions extends around the tubular blank; and cutting the tubular blank into a number of annular pieces, wherein each of the annular pieces includes one of the elongated protrusions.

First claim

What is claimed is:

1. A method for manufacturing a middle frame for mobile terminal, comprising:
providing a metal plate;
forming a plurality of elongated protrusions arranged in parallel on the plate, the plurality of elongated protrusions each extending along a length direction of the metal plate;
forming a tubular blank by bending the metal plate such that each of the plurality of elongated protrusions extends around the tubular blank; and
cutting the tubular blank into a plurality of annular pieces, wherein each of the plurality of annular pieces comprises one of the plurality of elongated protrusions.

2. The method of claim 1 , further comprising:
before the forming a tubular blank by bending the metal plate, forming a plurality of spacing protrusions between each two adjacent ones of the plurality of elongated protrusions by stamping the metal plate, wherein each of the plurality of spacing protrusions connects to two adjacent ones of the plurality of elongated protrusions;
wherein, during the cutting the tubular blank into the plurality of annular pieces, each of the plurality of spacing protrusions is cut in halves to form a protecting portion on each of the plurality of annular pieces.

3. The method of claim 2 , further comprising:
connecting together two ends of the one of the plurality of elongated protrusions of each of the plurality of annular pieces.

4. The method of claim 3 , wherein the connecting together the two ends of the one of the plurality of elongated protrusions comprises:
performing nano-molding treatment to connect together the two ends of the one of the plurality of elongated protrusions.

5. The method of claim 3 , further comprising:
forming a middle plate at a center of each of the plurality of annular pieces by injection molding; or
providing a plurality of middle plates, locating each of the plurality of middle plates at a center of a respective one of the plurality of annular pieces and connecting each of the plurality of middle plates to the respective one of the plurality of annular pieces by injection molding.

6. The method of claim 5 , further comprising:
applying surface processing to an outer surface of each of the plurality of annular pieces, wherein
the surface processing comprises at least one of anodizing, physical vapor deposition, deposition by electrophoresis or spraying.

7. The method of claim 6 , further comprising:
after the applying the surface processing, removing the protecting portion of each of the plurality of annular pieces.

8. The method of claim 2 , further comprising:
before the forming the tubular blank by bending the metal plate, removing a portion of the metal plate located between two adjacent ones of the plurality of elongated and between two of the plurality of spacing protrusions.

9. The method of claim 1 , wherein
each of the plurality of elongated protrusions comprises a length portion and a width portion, a width of the length portion is different from a width of the width portion; and
during the forming the tubular blank by bending the metal plate and the cutting the tubular blank into the plurality of annular pieces, the length portion forms a length edge of a respective one of the plurality of annular pieces, and the width portion forms a width edge of the respective one of the plurality of annular pieces.

10. The method of claim 1 , further comprising:
before the forming the plurality of elongated protrusions, forming a location hole on the metal plate.

11. The method of claim 1 , wherein
a thickness of the metal plate is no larger than 2 mm.

12. A method for manufacturing a plurality of middle frames for mobile terminal, comprising:
providing a metal plate;
stamping the metal plate to form a plurality of elongated protrusions, a plurality of spacing protrusions and an intermediate portion, wherein
each of the plurality of elongated protrusions extends along a length direction of the metal plate;
the plurality of spacing protrusions are located between each two adjacent ones of the plurality of elongated protrusions, and each of the plurality of spacing protrusions connects to two adjacent ones of the plurality of elongated protrusions; and
the intermediate portion is located among the plurality of elongated protrusions and the plurality of spacing protrusions;
removing a portion of the intermediate portion by stamping;
bending the metal plate to form a tubular blank such that each of the plurality of elongated protrusions extends around the tubular blank; and
cutting the tubular blank into a plurality of annular pieces, wherein each of the plurality of annular pieces comprises one of the plurality of elongated protrusions, and each of the plurality of spacing protrusions is cut in halves to form a protecting portion on each of the plurality of annular pieces.

13. The method of claim 12 , further comprising:
performing nano-molding treatment to connect together the two ends of the one of the plurality of elongated protrusions.

14. The method of claim 13 , further comprising:
forming a middle plate at a center of each of the plurality of annular pieces by injection molding; or
providing a plurality of middle plates, locating each of the plurality of middle plates at a center of a respective one of the plurality of annular pieces and connecting each of the plurality of middle plates to the respective one of the plurality of annular pieces by injection molding.

15. The method of claim 14 , further comprising:
applying surface processing to an outer surface of each of the plurality of annular pieces, wherein the surface processing comprises at least one of anodizing, physical vapor deposition, deposition by electrophoresis and spraying.

16. The method of claim 15 , further comprising:
after the applying the surface processing, removing the protecting portion of each of the plurality of annular pieces.

17. The method of claim 12 , wherein
each of the plurality of elongated protrusions comprises a length portion and a width portion, a width of the length portion is different from a width of the width portion; and
during the forming the tubular blank by bending the metal plate and the cutting the tubular blank into the plurality of annular pieces, the length portion forms a length edge of a respective one of the plurality of annular pieces, and the width portion forms a width edge of the respective one of the plurality of annular pieces.

18. The method of claim 12 , further comprising:
before the stamping the metal plate, forming a location hole on the metal plate.

19. The method of claim 12 , wherein
a thickness of the metal plate is no larger than 2 mm.

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zeng Yuanqing

Classifications

• G06F1/1656

  Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203) · CPC title

• B23P15/00

  Making specific metal objects by operations not covered by a single other subclass or a group in this subclass · CPC title

• B21D22/025 Primary

  for tubular articles · CPC title

• B21D13/02

  by pressing · CPC title

• B01D35/00

  Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions · CPC title