Title:
MOVING-IRON STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/196105
Kind Code:
A1
Abstract:
Disclosed is a moving-iron structure (100), relating to the technical field of loudspeakers. The moving-iron structure (100) comprises: a housing (10) provided with an air passage (14), a first through hole (111), a second through hole (121), a magnetic element (20) and a diaphragm (30), wherein the first through hole (111) is in communication with the second through hole (121) via the air passage (14); one face of the diaphragm (30) is provided with a first protruding portion (321) fitted with the first through hole (111); and an electromagnetic induction coil (40) is fixed onto the other surface of the diaphragm (30), and the electromagnetic induction coil (40) is located in a magnetic field of the magnetic element (20). When the electromagnetic induction coil (40) is energized, the electromagnetic induction coil (40) can drive the diaphragm (30) to move towards or away from the first through hole (111). Therefore, by controlling the relative motion between the electromagnetic induction coil (40) and the magnetic element (20), the first protruding portion (321) and the first through hole (111) are in a blocked state, a separate state, etc., thereby realizing control over a communication state between the first through hole (111) and the second through hole (121). When the first through hole and the second through hole are in communication, a user can hear external sounds, and the air pressure inside the human ear and the external air pressure are also kept at the same level, thereby improving the safety and comfort of the user when wearing earphones.
Inventors:
LEE RYAN (CN)
Application Number:
PCT/CN2018/083028
Publication Date:
October 17, 2019
Filing Date:
April 13, 2018
Export Citation:
Assignee:
SHENZHEN BELLSING ACOUSTIC TECH CO LTD (CN)
International Classes:
H04R11/02
Foreign References:
| CN205921741U | 2017-02-01 | |||
| CN105101020A | 2015-11-25 | |||
| CN203399283U | 2014-01-15 | |||
| CN103581809A | 2014-02-12 | |||
| CN105979455A | 2016-09-28 | |||
| CN201878324U | 2011-06-22 | |||
| JP3092911B2 | 2000-09-25 | |||
| US20070242393A1 | 2007-10-18 |
Attorney, Agent or Firm:
LIUJIA CHINA IP LAW OFFICE (CN)
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