Panel-form loudspeaker

Patent metadata

Field	Value
Publication number	US-9716949-B2
Application number	US-201414514566-A
Country	US
Kind code	B2
Filing date	Oct 15, 2014
Priority date	Jan 10, 2014
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

A panel-form loudspeaker is disclosed. The panel-form loudspeaker includes a lower cover including a recess, and a vibration acoustic unit facing the recess with a periphery thereof fixed on the lower cover for actuating the lower cover to vibrate and generate sound.

First claim

What is claimed is:

1. A panel-form loudspeaker, comprising:
a lower cover including an outer surface and an inner surface opposite to the outer surface, a recess depressed from the inner surface toward the outer surface, and a projection protruding away from the outer surface and surrounding the recess; wherein, the projection defines a plurality of first slots in a top surface thereof, and the first slots are spaced from each other in a circumferential direction of the projection;
an vibration acoustic unit facing the recess, the vibration acoustic unit including a diaphragm with a periphery thereof fixed to the top surface of the projection and covering the first slots, and a pair of piezoelectric element attached to the both sides of the diaphragm for driving the diaphragm;
a plurality of sound holes penetrating the lower cover from the outer surface to the inner surface;
an upper cover including a receiving hole and pressing the periphery of the diaphragm for fixing the diaphragm to the top surface of the projection with the vibration acoustic unit partially received in the receiving hole; wherein,
the upper cover comprises a lower surface facing the lower cover, an upper surface opposite to the lower surface, and an engaging groove corresponding to the projection formed on the lower surface for receiving the projection of the lower cover so that the diaphragm is fixed into the engaging groove by the projection; and
a plurality of second slots corresponding to the first slots one by one formed on the lower surface on which the engaging groove is formed, and the second slots covered by the diaphragm.

2. A panel-form loudspeaker, comprising:
a lower cover including an outer surface disposed outside, an inner surface opposite to the outer surface, a recess formed on the inner surface and a projection formed on the inner surface, protruding away from the outer surface and surrounding the recess;
wherein, the projection defines a plurality of first slots in a top surface thereof, and the first slots are spaced from each other in a circumferential direction of the projection;
a vibration acoustic unit facing the recess with a periphery thereof fixed to the top surface of the projection for actuating the lower cover to vibrate and generate sound and covering the first slots;
an upper cover located above the lower cover and pressing the periphery of the vibration acoustic unit for fixing the vibration acoustic unit to the top surface of the projection, wherein,
the upper cover includes an upper surface away from the lower cover and a lower surface opposite to the upper surface, a receiving hole that penetrates the upper cover from the lower surface to the upper surface for partially receiving the vibration acoustic unit therein, and an engaging groove corresponding to the projection formed in the lower surface for receiving the projection of the lower cover so that the vibration acoustic unit is fixed into the engaging groove by the projection; and
the upper cover further provides a plurality of second slots corresponding to the first slots one by one formed in the lower surface in which the engaging groove is formed, and the second slots covered by the vibration acoustic unit.

3. The panel-form loudspeaker of claim 2 , wherein at least one sound hole is formed in the lower cover in which the recess is formed.

4. The panel-form loudspeaker of claim 1 , wherein each of the first slot and the second slot corresponding to the first slot corporately form an accommodating space for accommodating injected glue so that the diaphragm is fixed between the lower cover and the upper cover by glue.

5. The panel-form loudspeaker of claim 2 , wherein each of the first slot and the second slot corresponding to the first slot corporately form an accommodating space for accommodating injected glue so that the diaphragm is fixed between the lower cover and the upper cover by glue.

Assignees

• Zhou Rongguan
• Wang Hongxing
• Mao Lubin
• Aac Technologies Pte Ltd

Inventors

• Zhou Rongguan
• Wang Hongxing
• Mao Lubin

Classifications

• H04R2499/11

  Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's · CPC title

• H04R17/00

  Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00}) · CPC title

• H04R7/045 Primary

  using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion · CPC title

• H04R7/10

  comprising superposed layers in contact · CPC title