# US 2018/0324528 A1 · Loudspeaker with a field replaceable moving assembly and method of assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0324528 A1 - Document ID: US20180324528A1 - Status: Published application - Kind: A1 - Application number: 15/585,310 - Filed: 2017-05-03 - Published: 2018-11-08 - Earliest claimed: 2017-05-03 - Assignees: JL Audio, Inc. - Inventors: Lucio Proni - Web page: https://patentgrep.com/patent/US20180324528A1 ## CPC - H04R 9/06: Loudspeakers - H04R 9/043: {Inner suspension or damper, e.g. spider (outer suspension or surround H04R7/16)} - H04R 31/006: {Interconnection of transducer parts (of diaphragm and outer suspension by moulding H04R31/003)} - H04R 7/18: at the periphery - H04R 9/025: {Magnetic circuit} - H04R 2400/11: Aspects regarding the frame of loudspeaker transducers - 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 A loudspeaker and method of assembly according to this invention provides for simplified replacement of defective parts that can be accomplished by an unskilled worker without the use of gauges, guides, fixtures or other equipment. A moving assembly, and a combined frame and motor structure, are assembled independently of one another and then connected together, within acceptable tolerances, by a centering tee which is affixed to the moving assembly and may be easily connected to and disconnected from the motor structure. ## Claims ### Claim 1 A loudspeaker, comprising: a frame; a motor structure having a top plate formed with a through bore, said motor structure being mounted to said frame; an assembled moving structure, comprising: (i) a voice coil; (ii) a lower suspension coupled to said voice coil; (iii) an upper suspension; (iv) a diaphragm connected between said voice coil and said upper suspension; (v) a centering element having a first end and a second end, said first end of said centering element being permanently mounted to said lower suspension, said assembled moving structure being mounted to said motor structure by inserting said second end of said centering element through said through bore in said motor structure and connecting a fastener to said second end. ### Claim 2 (depends on 1) The loudspeaker of claim 1 in which said centering element includes a head section and a stem section. ### Claim 3 (depends on 2) The loudspeaker of claim 2 in which said stem section of said centering element is inserted into said motor structure through said through bore in said top plate, said fastener being secured to said stem section to mount said moving assembly to said motor structure. ### Claim 4 (depends on 2) The loudspeaker of claim 2 in which said stem section of said centering element comprises an upper portion, a lower portion and an intermediate portion between said upper and lower portions, said intermediate portion of said stem section extending along and snugly fitting within said through bore in said top plate when said centering element is inserted into said motor structure. ### Claim 5 (depends on 4) The loudspeaker of claim 4 in which a shoulder is formed at the juncture of said upper portion and said intermediate portion of said stem section, said shoulder resting atop said top plate when said centering element is inserted into said motor structure. ### Claim 6 (depends on 4) The loudspeaker of claim 4 in which at least part of said lower portion of said stem section is formed with external threads, said fastener comprising a nut which is connected to said external threads. ### Claim 7 A moving assembly for connection to a motor structure and a frame of a loudspeaker, the motor structure having a central opening, said moving assembly comprising: a voice coil; a lower suspension coupled to said voice coil; an upper suspension; a diaphragm connected between said voice coil and said upper suspension; a centering element having a first end and a second end, said first end of said centering element being permanently mounted to said lower suspension, said second end of said centering element being adapted to be inserted into the central opening in the motor structure and mounted thereto. ### Claim 8 (depends on 7) The moving assembly of claim 7 in which said centering element includes a head section and a stem section. ### Claim 9 (depends on 7) The moving assembly of claim 7 in which said stem section of said centering element comprises an upper portion, a lower portion and an intermediate portion between said upper and lower portions, at least part of said lower portion being formed with external threads. ### Claim 10 (depends on 9) The moving assembly of claim 9 in which a shoulder is formed at the juncture of said upper portion and said intermediate portion of said stem section. ### Claim 11 The method of assembling a loudspeaker, comprising: (a) connecting a frame and a motor structure of the loudspeaker to one another, the motor structure having a central opening; (b) assembling a moving assembly of the loudspeaker separate from the frame and the motor structure, said moving assembly comprising a voice coil, a lower suspension coupled to said voice coil, an upper suspension, a diaphragm connected between said voice coil and said upper suspension and a centering element having a first end permanently mounted to said lower suspension and a second end; (c) mounting said assembled moving assembly to said motor structure by first inserting said second end of said centering element of said assembled moving assembly into said central opening of said motor structure and then securing said second end to said motor structure. ### Claim 12 (depends on 11) The method of claim 11 in which step (c) includes inserting a stem section of the centering element into said central opening in said motor structure, a portion of said stem section being formed with external threads. ### Claim 13 (depends on 12) The method of claim 12 in which step (c) comprises attaching a nut to said external threads of said stem section to mount said moving assembly to said motor structure. ### Claim 14 (depends on 3) The loudspeaker of claim 3 in which said motor structure further comprises a magnet formed with a central bore in alignment with said through bore in said top plate, said central bore having a first diameter and said stem section of said centering element having second diameter which is less than said first diameter, said fastener being inserted into said central bore of said magnet and into engagement with said stem section of said centering element to secure said moving structure to said motor structure. ### Claim 15 A loudspeaker, comprising: a frame; a motor structure having a top plate formed with a through bore, said motor structure being mounted to said frame; an assembled moving structure, comprising: (i) a voice coil; (ii) a lower suspension coupled to said voice coil; (iii) an upper suspension; (iv) a diaphragm connected between said voice coil and said upper suspension; (v) a centering element having a head section and a stem section, said head section being fixedly mounted to said lower suspension, said stem section comprising an upper portion, a lower portion and an intermediate portion located between said upper and lower portions, a shoulder being formed at the juncture of said upper portion and said intermediate portion, said stem section being inserted into said through bore of said top plate such that said shoulder rests atop said top plate and said intermediate section extends along said through bore; a fastener connected to said lower portion of said stem section of said centering element to mount said assembled moving structure to said motor structure. ### Claim 16 (depends on 15) The loudspeaker of claim 15 in which said motor structure further comprises a magnet formed with a central bore in alignment with said through bore in said top plate, said central bore having a first diameter and said lower portion of said stem section of said centering element having a second diameter which is less than said first diameter, said fastener being inserted into said central bore of said magnet and into engagement with said lower portion of said stem section of said centering element to secure said moving structure to said motor structure. ### Claim 17 (depends on 16) The loudspeaker of claim 16 in which at least part of said lower portion of said stem section is formed with external threads, said fastener comprising a nut which is connected to said external threads.