Title:
PROCESSING METHOD FOR FRONT COVER, FRONT COVER, AND SOUND PRODUCTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/133911
Kind Code:
A1
Abstract:
Disclosed are a processing method for a front cover, a front cover, and a sound production device. The processing method for a front cover comprises the following steps: bending the outer edge of a metal sheet to form a flange, the metal sheet having an upper surface and a lower surface, and the flange being formed on the side where the lower surface is located; pressing the flange from the lower surface to the upper surface, so that the width of the flange in a transverse direction becomes larger and the flange is stacked with the metal sheet to form an edge portion of the metal sheet; and punching the metal sheet to form sound output holes. The technical solution of the present invention can better implement the thickening of the edge portion of the front cover.
Inventors:
LI JIE (CN)
LI JUN (CN)
ZHOU WUQIANG (CN)
LI JUN (CN)
ZHOU WUQIANG (CN)
Application Number:
PCT/CN2019/089452
Publication Date:
July 02, 2020
Filing Date:
May 31, 2019
Export Citation:
Assignee:
GOERTEK INC (CN)
International Classes:
H04R31/00
Foreign References:
| CN109413562A | 2019-03-01 | |||
| CN107820192A | 2018-03-20 | |||
| CN107820192A | 2018-03-20 | |||
| CN205017576U | 2016-02-03 | |||
| CN106973354A | 2017-07-21 | |||
| US6411719B1 | 2002-06-25 |
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