Sound production device and assembling method therefor

Patent metadata

Field	Value
Publication number	US-11722824-B2
Application number	US-201917631539-A
Country	US
Kind code	B2
Filing date	Dec 24, 2019
Priority date	Aug 31, 2019
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

Disclosed is a sound production device including a housing and a vibration assembly, the vibration assembly comprising a vibration diaphragm and a voice coil combined to one side of the vibration diaphragm; wherein the sound production device further comprises a system stabilization component connected with the voice coil; the system stabilization component is of a line-like structure formed by winding a metal wire, and comprises a first connection part connected to the voice coil, a deformation part, and a second connection part connected to the housing. By adopting the sound production device of this structure, the voice coil will not be polarized under the condition of large displacement, and the system stabilization component having a novel structure does not hinder the free vibration of the voice coil either.

First claim

The invention claimed is:

1. A sound production device comprising a housing and a vibration assembly, the vibration assembly comprising a vibration diaphragm and a voice coil combined and positioned at one side of the vibration diaphragm; wherein the sound production device further comprises a system stabilization component connected with the voice coil;
wherein the system stabilization component comprises a line-like structure including a wound metal wire, a first connection part connected to the voice coil, a deformation part, and a second connection part connected to the housing,
wherein the system stabilizer is in a planar structure, and is located in a plane perpendicular to a vibration direction of the voice coil.

2. The sound production device of claim 1 , wherein the first connection part comprises a first bonding zone and a third bonding zone; the first bonding zone being combined with the voice coil, the first bonding zone having a shape matching a shape of a portion of the voice coil to which the first bonding zone is combined; wherein
the third bonding zone protrudes from the first bonding zone and is electrically connected with a lead of the voice coil; and
the first bonding zone and the third bonding zone are located on the same plane.

3. The sound production device of claim 1 , wherein the deformation part is formed by connecting a plurality of U-bend structures, with adjacent U-bends bending in opposite directions.

4. The sound production device of claim 1 , wherein the housing is provided with a pad, and the second connection part includes a first fixation part located at one end of the deformation part close to the housing; and the first fixation part is electrically connected with the pad.

5. The sound production device of claim 4 , wherein the second connection part further includes a second fixation part, the housing is provided with a location column, and
the second fixation part is wound on the location column to combine the second fixation part with the location column as a whole; and
the second fixation part is located at one end of the first fixation part far away from the deformation part.

6. The sound production device of claim 5 , wherein a top end of the location column is configured to be hot melted after the second fixation part is wound on the location column.

7. The sound production device of claim 1 , wherein the first connection part, the deformation part and the second connection part are continuous structures formed by a wound metal wire; and
the first connection part, the deformation part and the second connection part are located on the same plane.

8. The sound production device of claim 7 , wherein the voice coil is of a hollow columnar structure or a flat structure; the vibration diaphragm is selected from the group consisting of a vibration diaphragm combined with an end face of a top end or a bottom end of the voice coil and adapted for the voice coil having a hollow columnar structure, or and a vibration diaphragm combined with a narrow end face of the voice coil and adapted for the voice coil having a flat structure; and wherein
the first connection part is connected to an end of the voice coil close to the vibration diaphragm; or,
the first connection part is connected to an end of the voice coil far away from the vibration diaphragm; or,
the first connection part is connected to an intermediate position of the voice coil.

9. The sound production device of claim 8 , wherein the system stabilization component is combined to one end of the voice coil proximate to the vibration diaphragm, and the vibration diaphragm, the system stabilization component and the voice coil are bonded together; and
the first connection part further comprises a second bonding zone protruding from the first bonding zone, at least part of the second bonding zone being combined to the vibration diaphragm and the voice coil.

10. The sound production device of claim 7 , wherein the system stabilization component is made of a non-magnetic material.

11. The sound production device of claim 7 , wherein the sound production device is a miniature sound production device, the system stabilization component comprises a wound wire with a circular cross section, and a wire diameter of the system stabilization component is within a numerical range of 0.08 mm to 0.15 mm.

12. The sound production device of claim 7 , wherein the sound production device is a large sound production device, the system stabilization component comprises a wound wire with a circular cross section, and a wire diameter of the system stabilization component is within a numerical range of 0.2 mm to 0.5 mm.

13. An assembling method of a sound production device comprising the system stabilization component, the vibration assembly and the housing according to claim 1 , comprising:
lifting the system stabilization component by a jig, after the system stabilization component and the housing are fixedly connected, removing the jig to place a voice coil on the system stabilization component at a position corresponding to the first connection part.

14. The assembling method of the sound production device of claim 13 , wherein the assembling method further comprises applying glue to the vibration diaphragm including a bonding part for bonding with the voice coil, applying glue to the bonding part of the vibration diaphragm and then bonding and fixing the vibration diaphragm, the system stabilization component and voice coil together.

15. The assembling method of the sound production device of claim 13 , wherein the jig lifts the housing and the system stabilization component simultaneously so that the system stabilization component is fixedly connected with the housing.

16. The assembling method of the sound production device of claim 15 , wherein the jig includes a boss including a top surface and a side surface located at a periphery of the top surface and a pallet located at a lower end of the side surface, wherein the top surface, the side surface and the pallet form a step;
the system stabilization component is lifted by the pallet and disposed around the side surface of the boss; and a width of the pallet is greater than or equal to a width of the second bonding zone.

Assignees

• Goertek Inc

Inventors

• Guo Xiaodong

Classifications

• H04R9/066 Primary

  using the principle of inertia · CPC title

• H04R7/127

  dome-shaped · CPC title

• H04R7/16

  Mounting or tensioning of diaphragms or cones · CPC title

• H04R9/045

  Mounting (H04R9/043 takes precedence) · CPC title

• H04R31/006

  Interconnection of transducer parts (of diaphragm and outer suspension by moulding H04R31/003) · CPC title