# US 2018/0027336 A1 · Miniature Sounding Device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0027336 A1 - Document ID: US20180027336A1 - Status: Published application - Kind: A1 - Application number: 15/416,845 - Filed: 2017-01-26 - Published: 2018-01-25 - Earliest claimed: 2016-07-20 - Assignees: AAC Technologies Pte. Ltd. - Inventors: Shuai Li; Fan Zhang; Zhijun Yan - Web page: https://patentgrep.com/patent/US20180027336A1 ## CPC - H04R 9/06: Loudspeakers - H04R 1/06: Arranging circuit leads; Relieving strain on circuit leads - H04R 7/127: {dome-shaped} - H04R 7/18: at the periphery - H04R 9/025: {Magnetic circuit} - 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, including a fixing system; and a vibrating system including a diaphragm, a voice coil underneath the diaphragm and configured to drive the diaphragm to vibrate and sound and a flexible circuit board outside the voice coil, the voice coil includes a first end surface which is connected with the diaphragm and a second end surface opposite to the first end surface, the flexible circuit board is level with the first end surface and includes a first surface adjacent to the diaphragm and a second surface opposite to the first surface, the voice coil includes a voice coil lead wire which extends out from the first end surface and is fixedly connected with the second surface, a gap configured to provide space for the voice coil is provided at a side of the flexible circuit board adjacent to the voice coil. ## 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 and a voice coil lead wire which extends out from the first end surface of the voice coil, the flexible circuit board is level with the first end surface of the voice coil and comprising a first surface which is adjacent to the diaphragm and a second surface which is opposite to the first surface; wherein, the voice coil lead wire is fixedly connected with the second surface of the flexible circuit board, and a gap configured to provide space for the voice coil lead wire is provided at a side of the flexible circuit board adjacent to 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, a flexible connecting arm which connects the first fixing portion with the second fixing portion, and a first bonding pad which extends out from the second fixing portion and is welded with the voice coil lead wire; the gap is provided on the first bonding pad. ### Claim 4 (depends on 3) The miniature sounding device as described in claim 3, wherein, the second fixing portion 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 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 first fixing portion is adhesively fixed onto the voice diaphragm. ### Claim 8 (depends on 3) The miniature sounding device as described in claim 3, wherein, the second fixing portion is adhesively fixed onto the dome. ### Claim 9 (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 10 (depends on 9) The miniature sounding device as described in claim 9, wherein, the dome extends outward beyond the main body portion of the voice diaphragm.