Patent ID: 11943597
Assignee: SUZHOU SENSORFUN ELECTRONICS CO., LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A receiver, comprising:
a housing having a hollow inner cavity;
a diaphragm mechanism disposed in the hollow inner cavity, partitioning the hollow inner cavity into a first cavity and a second cavity, and comprising a vibration plate comprising a free end being suspended in the hollow inner cavity and a fixed end;
an electromagnetic driving mechanism disposed in the hollow inner cavity and comprising a coil assembly and at least one magnetic field generation member,
wherein each magnetic field generation member is disposed in the first cavity or the second cavity and is close to the free end of the vibration plate, the coil assembly is disposed in the second cavity and comprises a coil and a magnetic core,
wherein the coil and the vibration plate are placed in the same direction, the magnetic core is inserted in a hollow inner hole of the coil, a first end of the magnetic core extends out of the hollow inner hole of the coil and is fixed in the second cavity, and a second end of the magnetic core extends out of the hollow inner hole of the coil and serves as a support at a fixed end of the vibration plate, the vibration plate is made of a magnetic permeable material, and
wherein a periphery of the diaphragm mechanism is sealingly connected to an inner wall of the housing,
wherein the electromagnetic driving mechanism further comprises a first magnetic permeable block and a second magnetic permeable block sequentially arranged between the second magnetic field generation member and a bottom surface of the housing,
wherein the first magnetic permeable block and the second magnetic permeable block are arranged opposite to each other and are spaced apart from each other, the first end of the magnetic core extending out of the hollow inner hole of the coil is clamped between the first magnetic permeable block and the second magnetic permeable block, the magnetic core comprises a horizontal portion, wherein the horizontal portion of the magnetic core is inserted in the hollow inner hole of the coil, and is parallel to the vibration plate, and
wherein the electromagnetic driving mechanism comprises:
a first magnetic field generation member, arranged within the first cavity, a first required gap being reserved between the first magnetic field generation member and the free end of the vibration plate; and
a second magnetic field generation member, arranged within the second cavity, a second required gap being reserved between the first magnetic field generation member and the free end of the vibration plate,
each of the first and the second required gap is 0.05-0.2 mm.