# US 2018/0027335 A1 · Miniature Sounding Device

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- Number: US 2018/0027335 A1
- Document ID: US20180027335A1
- Status: Published application
- Kind: A1
- Application number: 15/416,819
- Filed: 2017-01-26
- Published: 2018-01-25
- Earliest claimed: 2016-07-20
- Assignees: AAC Technologies Pte. Ltd.
- Inventors: Shuai Li; Fan Zhang
- Web page: https://patentgrep.com/patent/US20180027335A1

## CPC

- H04R 9/06: Loudspeakers
- H04R 7/127: {dome-shaped}
- H04R 7/18: at the periphery
- H04R 9/025: {Magnetic circuit}
- H04R 1/06: Arranging circuit leads; Relieving strain on circuit leads
- H04R 7/04: Plane diaphragms
- H04R 9/045: {Mounting (H04R9/043 takes precedence)}
- H04R 2499/11: Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

The present disclosure provides a miniature sounding device, the miniature sounding device includes a fixing system; and a vibrating system including a diaphragm, a voice coil which is arranged underneath the diaphragm and is configured to drive the diaphragm to vibrate and sound, and a flexible circuit board arranged at an external side of the voice coil, the voice coil including a first end surface which is connected with the diaphragm and a second end surface which is opposite to the first end surface, the flexible circuit board is level with the first end surface. In the miniature sounding device provided by the present disclosure, the arrangement that the flexible circuit board is level with the voice coil can save height space.

## Claims

### Claim 1

A miniature sounding device, comprising:
a fixing system; and
a vibrating system comprising a diaphragm, a voice coil which is arranged underneath the diaphragm and is configured to drive the diaphragm to vibrate and sound, and a flexible circuit board arranged at an external side of the voice coil, the voice coil comprising a first end surface which is connected with the diaphragm and a second end surface which is opposite to the first end surface;
wherein, the flexible circuit board is level with the first end surface of the voice coil.

### Claim 2 (depends on 1)

The miniature sounding device as described in claim 1, wherein, the diaphragm comprises a voice diaphragm, and a dome arranged at a side of the voice diaphragm adjacent to the fixing system.

### Claim 3 (depends on 2)

The miniature sounding device as described in claim 2, wherein, the flexible circuit board comprises a first fixing portion which is fixedly connected with the voice diaphragm, a second fixing portion which is fixedly connected with the dome, and a flexible connecting arm which connects the first fixing portion with the second fixing portion.

### Claim 4 (depends on 3)

The miniature sounding device as described in claim 3, wherein, the second fixing portion of the flexible circuit board is arranged at a short axis edge side of the voice coil.

### Claim 5 (depends on 4)

The miniature sounding device as described in claim 4, wherein, the first fixing portion of the flexible circuit board is of a ring shape, the first fixing portion comprises a pair of short axis walls opposite to a short axis edge of the voice coil and a pair of long axis walls opposite to a long axis edge of the voice coil.

### Claim 6 (depends on 5)

The miniature sounding device as described in claim 5, wherein, one end of the flexible connecting arm is connected with the second fixing portion, the other end of the flexible connecting arm is connected with the long axis wall of the first fixing portion.

### Claim 7 (depends on 3)

The miniature sounding device as described in claim 3, wherein, the second fixing portion of the flexible circuit board is adhesively connected with the dome.

### Claim 8 (depends on 3)

The miniature sounding device as described in claim 3, wherein, the voice diaphragm comprises a main body portion which is fixedly connected with the dome, a suspension portion which extends outward from the main body portion and surrounds the main body portion, and an extending portion which extends outward from the suspension portion and surrounds the suspension portion; the extending portion is fixedly connected with the first fixing portion.

### Claim 9 (depends on 8)

The miniature sounding device as described in claim 8, wherein, the dome extends outward beyond the main body portion of the voice diaphragm.

### Claim 10 (depends on 1)

The miniature sounding device as described in claim 1, wherein, the vibrating system further comprises a supporting piece arranged underneath the voice coil and configured to support the voice coil, the supporting piece comprises a third fixing portion which is connected with the second end surface of the voice coil, a fourth fixing portion which is connected with the fixing system, and a concave portion which connects the third fixing portion with the fourth fixing portion.