Speaker

Patent metadata

Field	Value
Publication number	US-9900704-B2
Application number	US-201615296322-A
Country	US
Kind code	B2
Filing date	Oct 18, 2016
Priority date	Nov 5, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A speaker is provided in the present disclosure. The speaker includes a magnetic circuit system, a vibration system and an auxiliary system suspending the vibration system above the magnetic circuit system. The magnetic circuit system comprises a yoke, permanent magnets assembled on the yoke, and a magnetic gap near the permanent magnets. The yoke comprises an upper surface for assembling the permanent magnets, a lower surface opposite to the upper surface, side surfaces connecting the upper surface and the lower surface, and communication conduits extending through the upper surface and the side surface to communicate the magnetic gap and the space outside the speaker.

First claim

What is claimed is:

1. A speaker, comprising:
a magnetic circuit system,
a vibration system, and
an auxiliary system suspending the vibration system above the magnetic circuit system;
wherein the magnetic circuit system comprises:
permanent magnets assembled on the yoke,
a magnetic gap near the permanent magnets, and
a yoke, which comprises:
an upper surface for assembling the permanent magnets,
a lower surface opposite to the upper surface,
side surfaces connecting the upper surface and the lower surface, and
communication conduits communicating the magnetic gap and the space outside the speaker, wherein each of the communication conduits comprises:
a cut-out groove which is provided at the edge of the yoke and extends through the upper surface and the lower surface, and
a channel which communicates the magnetic gap and the cut-out groove and depresses from the upper surface to the lower surface.

2. The speaker of claim 1 , wherein the yoke is in the shape of rectangular plate, which comprises two long axis edge portions and two short axis edge portions connecting the long axis edge portion; there are four cut-out grooves in the long axis edge portions and the cut-out grooves are symmetrical two by two with respect to the center line in the long axis direction of the yoke; there are two cut-out grooves in the short axis edge portions and the cut-out grooves are symmetrical with respect to the center line B in the short axis direction of the yoke.

3. The speaker of claim 1 , wherein the vibration system comprises a diaphragm retained on the auxiliary system and a voice coil for driving the diaphragm to vibrate, one end of the voice coil is fixed with the diaphragm, and the other end of the coil is suspended in the magnetic gap.

4. The speaker of claim 3 , wherein the diaphragm comprises an edge portion with an outer perimeter secured on the auxiliary system and providing elastic deformation; a middle portion disposed at the inner perimeter of the edge portion; and a rigid composite layer affixed under the middle portion, wherein the voice coil is secured on the composite layer.

5. The speaker of claim 1 , wherein the auxiliary system comprises a basket receiving the magnetic circuit system, a front cover covering and connected with the basket, wherein the vibration system is retained on the basket.

6. The speaker of claim 5 , wherein the front cover comprises a plastic body portion and a rigid reinforcement injection molded with the body portion integrally; the front cover is provided a sound output hole, the sound output hole is provided in the rigid reinforcement.

7. The speaker of claim 5 , wherein the basket comprises basket side walls, the side walls of the basket are provided with through holes extending through the basket side walls and communicating the space under the diaphragm and the space outside the speaker.

8. The speaker of claim 5 , wherein the permanent magnets comprise a main permanent magnet assembled in the middle of the yoke and auxiliary permanent magnets disposed around the main permanent magnet and spaced apart from the main permanent magnet; the pole plates comprise a main pole plate and an auxiliary pole plate attached on the main permanent magnet and the auxiliary permanent magnets respectively; the gap between the main permanent magnet and the auxiliary permanent magnets is magnetic gap.

9. The speaker of claim 8 , wherein the auxiliary pole plate is in the shape of ring plate, which is injection molded integrally with the basket.

Assignees

• Ma Jing
• Zhang Long
• Aac Acoustic Tech Shenzhen Co Ltd

Inventors

• Ma Jing
• Zhang Long

Classifications

• H04R7/12

  Non-planar diaphragms or cones · CPC title

• H04R9/022

  Cooling arrangements · CPC title

• H04R9/06 Primary

  Loudspeakers · CPC title

• H04R7/20

  Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands · CPC title

• H04R2209/024

  Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers · CPC title