Loudspeaker and electronic device

Patent metadata

Field	Value
Publication number	US-12452604-B2
Application number	US-202318175767-A
Country	US
Kind code	B2
Filing date	Feb 28, 2023
Priority date	Sep 1, 2020
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

This application relate to the field of electronic device technologies, and in particular, to a loudspeaker and an electronic device. Embodiments of this application are provided to resolve a technical problem of insufficient sensitivity of a loudspeaker caused by a small electromagnetic driving force that drives a voice coil to vibrate. According to a loudspeaker and an electronic device in embodiments of this application, a yoke includes a bottom part and a sleeve located on the side of the bottom part. An annular magnet is sleeved on the outer side of the sleeve. A voice coil is sleeved on the sleeve and located between the magnet and the sleeve. A damper is located in a region enclosed by the sleeve. An outer edge of the damper is connected to the voice coil, and a middle part of the damper is connected to the yoke.

First claim

What is claimed is:

1. A loudspeaker, comprising:
a yoke;
a magnet;
a vibration diaphragm;
a voice coil; and
a damper,
wherein the yoke comprises a bottom part and a sleeve located on a side of the bottom part,
wherein the magnet is annular, and the magnet is sleeved on an outer side of the sleeve,
wherein the voice coil is sleeved on the outer side of the sleeve and is located between the sleeve and the magnet,
wherein an end face that is of the voice coil and that faces the vibration diaphragm is fixedly coupled to a side that is of the vibration diaphragm and that faces the bottom part,
wherein the vibration diaphragm includes a main body and an extension part, the main body is annular, the extension part is tubular, the extension part extends from an inner edge of the main body in a direction toward the bottom part, and an outer edge of the damper is fixedly coupled to an inner wall of the extension part, and
wherein the damper is located in a region enclosed by the sleeve.

2. The loudspeaker according to claim 1 , wherein the yoke further comprises a boss; the boss is located in the region enclosed by the sleeve; and a middle part of the damper is attached to a surface that is of the boss and that is away from the bottom part.

3. The loudspeaker according to claim 1 , wherein the loudspeaker further comprises a support tube, the support tube is located between the damper and the voice coil, and is located in the region enclosed by the sleeve, an outer edge of the damper is fixedly connected to an inner side wall of the support tube, and the support tube is fixedly connected to the voice coil.

4. The loudspeaker according to claim 3 , wherein both ends that are of the support tube and the voice coil and that are away from the bottom part are fixedly connected to the vibration diaphragm.

5. The loudspeaker according to claim 3 , wherein the loudspeaker further comprises a dust cap, the dust cap covers a top part of a sleeve region, and both the support tube and the voice coil are fixedly connected to an inner wall of the dust cap.

6. The loudspeaker according to claim 5 , wherein the inner wall of the dust cap is provided with a fastening ring, and both the support tube and the voice coil are connected to the fastening ring.

7. The loudspeaker according to claim 1 , wherein the loudspeaker further comprises a pole piece, the pole piece is annular, and the pole piece covers a surface that is of the magnet and that is away from the bottom part.

8. The loudspeaker according to claim 7 , wherein an edge that is of the pole piece and that faces the voice coil protrudes from an edge that is of the magnet and that faces the voice coil.

9. The loudspeaker according to claim 7 , wherein the loudspeaker further comprises a basket, the basket is provided with a groove, a groove bottom of the groove is provided with a fitting hole; and at least a part of the voice coil extends from the groove bottom of the groove through the fitting hole.

10. The loudspeaker according to claim 9 , wherein an edge of the fitting hole is attached to an end face that is of the pole piece and that is away from the voice coil.

11. The loudspeaker according to claim 1 , comprising a plurality of dampers, the plurality of dampers are stacked along a direction of a central axis of the sleeve, and every two adjacent dampers are separated from each other.

12. The loudspeaker according to claim 11 , wherein a boss is provided with a plurality of fastening portions along a direction of a central axis of the sleeve, and each damper is fastened to one fastening portion.

13. An electronic device, comprising:
a housing; and
a loudspeaker,
wherein the loudspeaker is located inside the housing,
wherein the loudspeaker comprises a yoke, a magnet, a voice coil, and a damper,
wherein the yoke comprises a bottom part and a sleeve located on a side of the bottom part,
wherein the magnet is annular, and the magnet is sleeved on an outer side of the sleeve,
wherein the voice coil is sleeved on the outer side of the sleeve and is located between the sleeve and the magnet,
wherein the loudspeaker further comprises a vibration diaphragm, and an end face that is of the voice coil and that faces the vibration diaphragm is fixedly coupled to a side that is of the vibration diaphragm and that faces the bottom part,
wherein the vibration diaphragm comprises a main body and an extension part, the main body is annular, the extension part is tubular, the extension part extends from an inner edge of the main body in a direction toward the bottom part, and an outer edge of the damper is fixedly coupled to an inner wall of the extension part, and
wherein the damper is located in a region enclosed by the sleeve.

14. The electronic device according to claim 13 , wherein the yoke further comprises a boss; the boss is located in the region enclosed by the sleeve; and a middle part of the damper is attached to a surface that is of the boss and that is away from the bottom part.

15. The electronic device according to claim 13 , wherein the loudspeaker further comprises a support tube, the support tube is located between the damper and the voice coil, and is located in the region enclosed by the sleeve, an outer edge of the damper is fixedly connected to an inner side wall of the support tube, and the support tube is fixedly connected to the voice coil.

16. The electronic device according to claim 15 , wherein both ends that are of the support tube and the voice coil and that are away from the bottom part are fixedly connected to the vibration diaphragm.

Assignees

• Huawei Tech Co Ltd

Inventors

• Chen Wenguang
• Guo Mingguang
• Tao Ling

Classifications

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title

• H04R2400/11

  Aspects regarding the frame of loudspeaker transducers · CPC title

• H04R9/06

  Loudspeakers · CPC title

• H04R9/045

  Mounting (H04R9/043 takes precedence) · CPC title

• H04R9/025 Primary

  Magnetic circuit · CPC title