# US 2017/0257705 A1 · Miniature speaker > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0257705 A1 - Document ID: US20170257705A1 - Status: Published application - Kind: A1 - Application number: 15/507,183 - Filed: 2014-10-30 - Published: 2017-09-07 - Earliest claimed: 2014-08-26 - Assignees: Goertek Inc. - Applicants: Goertek Inc. - Inventors: Xiaodong GUO; Chao JIANG - Web page: https://patentgrep.com/patent/US20170257705A1 ## CPC - H04R 9/046: {Construction} - H04R 1/06: Arranging circuit leads; Relieving strain on circuit leads - H04R 9/06: Loudspeakers - H04R 9/10: Telephone receivers - H04R 25/402: {using contructional means} - H04R 25/554: {using a wireless connection, e.g. between microphone and amplifier or using Tcoils} - H04R 25/65: {Housing parts, e.g. shells, tips or moulds, or their manufacture} - H04R 1/00: Details of transducers, {loudspeakers or microphones} - H04R 1/025: {Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture} - H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) - H04R 25/604: {of acoustic or vibrational transducers} - 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 invention relates to the technical field of electroacoustic products. Disclosed is a miniature speaker. The miniature speaker comprises an upper housing and a lower housing combined together. A vibration system and a magnetic circuit system are accommodated in the space defined by the upper housing and the lower housing. The upper housing is disposed close to the vibration system. The miniature speaker also comprises a hearing-aid voice coil. The hearing-aid voice coil is fixed to the upper housing and is located at the inner side of the upper housing. The miniature speaker of the present invention solves the problem of poor acoustics caused by collision of a lead wire of a vibrating voice coil with a hearing-aid voice coil of a miniature speaker in the prior art, and the miniature speaker of the present invention has good acoustic performance and a better hearing-aid effect. ## Claims ### Claim 1 A miniature speaker, comprising an upper housing and a lower housing which are combined together, wherein a vibration system and a magnetic circuit system are accommodated in a space defined by the upper housing and the lower housing, and the upper housing is arranged close to the vibration system, wherein the miniature speaker further comprises a hearing-aid voice coil fixed on the upper housing and located at an inner side of the upper housing. ### Claim 2 (depends on 1) The miniature speaker according to claim 1, wherein the upper housing has a stepped structure with a side having a larger thickness and a other side having a smaller thickness, and the hearing-aid voice coil is fixed at the side having a larger thickness. ### Claim 3 (depends on 2) The miniature speaker according to claim 2, wherein an annular groove is provided at the side having a larger thickness, the hearing-aid voice coil is fixed in the annular groove, and a surface of the hearing-aid voice coil exposed to the inner side of the upper housing is flush with an inner surface of the upper housing. ### Claim 4 (depends on 3) The miniature speaker according to claim 3, wherein extension recesses extending towards the outside of the annular groove are provided at both ends of one side of the annular groove respectively, and the one side is located at a middle part of the upper housing; two first pads for soldering lead wires of the hearing-aid voice coil are arranged at bottoms of two said extension recesses, respectively, two second pads electrically connected with the two first pads respectively are arranged on an end surface of the upper housing in contact with the lower housing, and the second pads are electrically connected with an external circuit of the speaker. ### Claim 5 (depends on 4) The miniature speaker according to claim 4, wherein pads for the hearing-aid voice coil are arranged on portions of an end surface of the lower housing opposite to the two second pads, respectively, the two second pads are electrically connected with the pads for the hearing-aid voice coil, respectively, and the pads for the hearing-aid voice coil are electrically connected with the external circuit of the speaker. ### Claim 6 (depends on 5) The miniature speaker according to claim 5, wherein the lower housing has an annular structure which is open at both ends, one end of the lower housing away from the upper housing has a stepped structure, and the pads for the hearing-aid voice coil are located on a lower end surface of the lower housing. ### Claim 7 (depends on 6) The miniature speaker according to claim 6, wherein the magnetic circuit system, comprises a yoke fixed on the lower housing, and a magnet and a washer which are sequentially arranged in the yoke; and an external surface of a bottom of the yoke is flush with a higher end surface of the lower housing. ### Claim 8 (depends on 7) The miniature speaker according to claim 7, wherein the lower end surface and the higher end surface are connected integrally through a connecting sidewall in which an opening is arranged at a position opposite to the yoke, a sidewall of the yoke is located at the opening, and an external surface of the sidewall of the yoke is flush with an external surface of the connecting, sidewall. ### Claim 9 (depends on 1) The miniature speaker according to claim 1, wherein the vibration system comprises a vibrating diaphragm with an edge portion thereof fixed between the upper housing and the lower housing, and a backing ring is arranged between the edge portion, of the vibrating diaphragm and the upper housing.