WO-2026090866-A1 - LOUDSPEAKER

WO2026090866A1WO 2026090866 A1WO2026090866 A1WO 2026090866A1WO-2026090866-A1

Abstract

Embodiments of the present description provide a loudspeaker, comprising: a housing having an inner cavity; a diaphragm arranged in the inner cavity; a driving unit configured to drive the diaphragm to vibrate; and a vibration transmission unit transmittingly connected to the diaphragm and the driving unit, wherein a first gap is arranged between the edge of the diaphragm and the inner wall of the housing to allow the diaphragm to slide relative to the inner wall of the housing.

Inventors

ZHOU, Wenbing
LIAO, Fengyun
QI, XIN

Assignees

深圳市韶音科技有限公司

Dates

Publication Date: 20260507
Application Date: 20241029

Claims (18)

A loudspeaker, comprising: A housing having an internal cavity; A diaphragm is disposed within the inner cavity; The driving unit drives the diaphragm to vibrate; A vibration transmission unit, wherein the vibration transmission unit is drivingly connected to the diaphragm and the drive unit; The diaphragm has a first gap between its edge and the inner wall of the housing to allow the diaphragm to slide relative to the inner wall of the housing.
The loudspeaker as claimed in claim 1, wherein the width of the first gap is less than or equal to 50 μm in a cross section perpendicular to the vibration direction of the diaphragm.
The speaker of claim 1, wherein a portion of the edge of the driving unit is connected to the inner wall of the housing, and a second gap exists between another portion of the edge of the driving unit and the housing.
The loudspeaker as claimed in claim 3, wherein the width of the second gap is less than or equal to 100 μm in a cross section perpendicular to the vibration direction of the diaphragm.
The loudspeaker as claimed in claim 1, wherein the driving unit includes a plurality of driving beams, each driving beam having a fixed end and a free end, the fixed end being connected to the housing; The drive unit also includes a reinforcing layer, and the free end of the drive beam is connected to the vibration transmission unit through the reinforcing layer; Each of the drive beams includes a piezoelectric layer, which is stacked with the reinforcing layer along the vibration direction of the diaphragm; the reinforcing layer includes a first connection region covered by the piezoelectric layer and a second connection region not covered by the piezoelectric layer, the second connection region connecting to the vibration transmission unit.
The loudspeaker as claimed in claim 5, wherein, in the direction from the fixed end to the free end, the length of the second connecting region is greater than 0 mm and less than or equal to 0.7 mm; and/or In the direction from the fixed end to the free end, the ratio of the length of the second connecting region to the length of the drive beam is greater than 0 and less than 25%.
The loudspeaker as claimed in claim 5 has a Young's modulus of 1E8Pa-1E10Pa.
The loudspeaker as claimed in claim 1, wherein the vibration transmission unit comprises a plurality of sub-transmission structures, the plurality of sub-transmission structures being spaced apart in a direction perpendicular to the vibration direction of the diaphragm.
The loudspeaker as claimed in claim 1 further includes an auxiliary driving structure, the auxiliary driving structure being disposed on the housing or located in the inner cavity, the auxiliary driving structure being located on the side of the diaphragm opposite to the driving unit, and a cavity being formed between the auxiliary driving structure and the diaphragm, the auxiliary driving structure being deformable.
The loudspeaker as described in claim 9, wherein the auxiliary driving structure moves towards or away from the driving unit synchronously with the diaphragm; The auxiliary drive structure includes multiple piezoelectric beams, which are arranged around the inner wall of the housing. One end of each piezoelectric beam is connected to the housing, and the other end is suspended. Alternatively, the auxiliary drive structure includes a piezoelectric ring, with the outer ring of the piezoelectric ring connected to the housing and the inner ring suspended.
The loudspeaker of claim 9, wherein the projection of the auxiliary driving structure along the vibration direction of the diaphragm covers the first gap.
The loudspeaker as claimed in claim 1, wherein a turbulence component is provided in the cavity along a flow path through which gas flows between the side of the diaphragm facing the drive unit and the side of the diaphragm away from the drive unit.
The loudspeaker of claim 12, wherein the turbulence assembly includes a plurality of protrusions disposed outside the edge of the diaphragm and on the inner wall of the housing.
The loudspeaker of claim 13, wherein the protrusions are distributed around the diaphragm.
The loudspeaker as claimed in claim 13, wherein the protruding structure is arc-shaped, and one end of the chord of the arc extends into the housing. The inner wall of the body is connected, and the other end of the arc-shaped string is suspended in the extension direction. The angle between the arc-shaped string and the vibration direction of the diaphragm is an acute angle.
The loudspeaker as claimed in claim 1 further includes a support member, and the vibration transmission unit or the diaphragm is connected to the inner wall of the housing through the support member.
The loudspeaker as claimed in claim 16, wherein the support member includes a plurality of support rods, one end of each support rod being connected to the vibration transmission unit or the diaphragm, and the other end of each support rod being connected to the inner wall of the housing; or, The support member includes a support ring, the inner ring of which is connected to the vibration transmission unit or the diaphragm, and the outer ring of which is connected to the inner wall of the housing. There is one or more hollow areas between the inner ring and the outer ring.
A loudspeaker, comprising: A housing having an internal cavity; A diaphragm is disposed in the inner cavity, and the diaphragm is connected to the inner wall of the housing through a support structure; A driving unit drives the diaphragm to vibrate. The driving unit includes a magnet and a voice coil. The voice coil is located in the magnetic field of the magnet and is connected to the diaphragm. The diaphragm has a first gap between its edge and the inner wall of the housing, and the support structure has a hole that allows air to flow between the two sides of the diaphragm in the direction of vibration, so that the magnet drives the voice coil to move and cause the diaphragm to slide relative to the inner wall of the housing.

Description

A loudspeaker Technical Field This specification relates to the field of acoustics, and in particular to a loudspeaker. Background Technology A loudspeaker typically consists of at least a driver section and a vibrating section. The driver section drives the vibrating section to vibrate, thus transmitting sound to the outside of the loudspeaker. The main problems faced by typical loudspeakers, especially miniature loudspeakers, are insufficient driving power in the driver section and significant losses in the vibrating section during vibration. Therefore, researching and improving the driving efficiency of loudspeakers and optimizing the structure of the vibrating section are of great significance in order to achieve high sound pressure level output. Summary of the Invention This specification provides one or more embodiments of a loudspeaker, comprising: a housing having an inner cavity; a diaphragm disposed in the inner cavity; a drive unit for driving the diaphragm to vibrate; and a vibration transmission unit for drivingly connecting the diaphragm and the drive unit; wherein a first gap is formed between the edge of the diaphragm and the inner wall of the housing to allow the diaphragm to slide relative to the inner wall of the housing. In some embodiments, the width of the first gap is less than or equal to 50 μm in a cross section perpendicular to the vibration direction of the diaphragm. In some embodiments, a portion of the edge of the drive unit is connected to the inner wall of the housing, and a second gap exists between another portion of the edge of the drive unit and the inner wall of the housing. In some embodiments, the width of the second gap is less than or equal to 100 μm in a cross section perpendicular to the vibration direction of the diaphragm. In some embodiments, the drive unit includes a plurality of drive beams, each drive beam having a fixed end and a free end, the fixed end being connected to the housing; the loudspeaker further includes a reinforcing layer, the free end being connected to the vibration transmission unit through the reinforcing layer; each drive beam includes a piezoelectric layer, the piezoelectric layer and the reinforcing layer being stacked along the vibration direction of the diaphragm; the reinforcing layer includes a first connection region covered by the piezoelectric layer and a second connection region not covered by the piezoelectric layer, the second connection region being connected to the vibration transmission unit. In some embodiments, in the direction from the fixed end to the free end, the length of the second connecting region is greater than 0 mm and less than or equal to 0.7 mm; and/or in the direction from the fixed end to the free end, the ratio of the length of the second connecting region to the length of the drive beam is 0 and less than 25%. In some embodiments, the Young's modulus of the reinforcing layer is 1E8Pa-1E10Pa. In some embodiments, the vibration transmission unit includes a plurality of sub-transmission structures, which are spaced apart in a direction perpendicular to the vibration direction of the diaphragm. In some embodiments, the loudspeaker further includes an auxiliary driving structure disposed on the housing or located in the inner cavity. The auxiliary driving structure is located on the side of the diaphragm away from the driving unit, and a cavity is formed between the auxiliary driving structure and the diaphragm. The auxiliary driving structure is capable of deformation to compensate for changes in the cavity volume caused by the vibration of the diaphragm. In some embodiments, the auxiliary driving structure moves towards or away from the driving unit synchronously with the diaphragm; the auxiliary driving structure includes multiple piezoelectric beams, which are arranged around the inner wall of the housing, with one end of each piezoelectric beam connected to the housing and the other end suspended; or, the auxiliary driving structure includes a piezoelectric ring, with the outer ring of the piezoelectric ring connected to the housing and the inner ring of the piezoelectric ring suspended. In some embodiments, the projection of the auxiliary drive structure along the vibration direction of the diaphragm covers the first gap. In some embodiments, a turbulence assembly is provided in the cavity along the flow path of the gas flowing between the side of the diaphragm facing the drive unit and the side of the diaphragm away from the drive unit. In some embodiments, the turbulence assembly includes a plurality of protrusions disposed outside the edge of the diaphragm and on the inner wall of the housing. In some embodiments, the protrusions are distributed around the diaphragm. In some embodiments, the protrusion structure is arc-shaped, one end of the extension direction of the arc-shaped chord is connected to the inner wall of the housing, the other end of the extension direction of the arc-shaped chord is su