SE436162B - PROCEDURE FOR ASSEMBLING THE PARTS OF A LEAKFIELD PERMANENT MAGNET SYSTEM FOR SPEAKERS - Google Patents
PROCEDURE FOR ASSEMBLING THE PARTS OF A LEAKFIELD PERMANENT MAGNET SYSTEM FOR SPEAKERSInfo
- Publication number
- SE436162B SE436162B SE8004195A SE8004195A SE436162B SE 436162 B SE436162 B SE 436162B SE 8004195 A SE8004195 A SE 8004195A SE 8004195 A SE8004195 A SE 8004195A SE 436162 B SE436162 B SE 436162B
- Authority
- SE
- Sweden
- Prior art keywords
- permanent magnet
- magnet ring
- bowl
- cover plate
- assembling
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Description
15 20 25 30 35 40 ,eoou19s-1 n 2 ningen av skålen och täckplattan, liksom till följd av nödvändig- heten av manuell montering av delarna, är detta kända förfarande förhållandevis dyrbart. 15 20 25 30 35 40, eoou19s-1 n 2 the use of the bowl and the cover plate, as well as due to the necessity of manual assembly of the parts, this known method is relatively expensive.
Vid ett annat känt förfarande, se tyska patentskriften 1 814 860, placeras systemets olika delar i en form samt över- sprutas med plast eller metall, varigenom mekanisk sammanhållning av delarna uppnås. Även detta förfarande erfordrar förhållande- vis mycket manuellt handhavande, vilket fördyrar tillverkningen.In another known method, see German Patent Specification 1,814,860, the various parts of the system are placed in a mold and sprayed with plastic or metal, whereby mechanical cohesion of the parts is achieved. This procedure also requires relatively much manual handling, which makes production more expensive.
Vid det inledningsvis angivna förfarandet uppnås enligt upp- finningen det ovan uppställda ändamålet därigenom, att lim auto- matiskt påföres på skålens botten, på den andra permanentmagnet- ringen och på täckplattans undersida, och att den limbestrukna, andra permanentmagnetringen under användning av en centrerings- kåpa förenas med den mellanplattsförsedda kärnan, liksom med täckplattan, för bildande av en enhet, vilken magnetiseras och därefter inplaceras i skålen, vid vars botten tillhörande första magnetiserade permanentmagnet är fastlimmad. ' I och för sig är det inte obetingat nödvändigt att limma fast den av den mellanplattsförsedda kärnan, permanentmagnet- ringen och täckplattan bestående konstruktionsdelen vid skålen, eftersom delen efter sitt införande i skålen hålls fast av mag- netkrafterna. Icke desto mindre-kan det i vissa fall vara fördel- aktigt att limma fast nämnda konstruktionsdel vid skålen. Detta kan antingen utföras vid kanten av täckplattan och skålen, eller - företrädesvis -.därigenom, att nämnda konstruktionsdel limmas vid den vid skålens botten fastlimmade permanentmagnetringen. n 'Uppfinningen förklaras närmare nedan i form av ett utförings- exempel och under hänvisning till den bifogade ritningen, vars enda fíggr schematiskt illustrerar förfarandets olika delsteg.In the initially stated method, according to the invention, the above-mentioned object is achieved in that glue is automatically applied to the bottom of the bowl, to the second permanent magnet and to the underside of the cover plate, and that the glue-coated, second permanent magnet ring using a centering cover is joined to the intermediate plate core, as well as to the cover plate, to form a unit, which is magnetized and then placed in the bowl, at the bottom of which the first magnetized permanent magnet is glued. As such, it is not absolutely necessary to glue the structural part consisting of the intermediate plate core, the permanent magnetization and the cover plate to the bowl, since the part is held by the magnetic forces after its insertion into the bowl. Nevertheless, in some cases it may be advantageous to glue said construction part to the bowl. This can either be done at the edge of the cover plate and the bowl, or - preferably - by gluing said construction part to the permanent magnet ring glued to the bottom of the bowl. The invention is explained in more detail below in the form of an exemplary embodiment and with reference to the accompanying drawing, the single figure of which schematically illustrates the various sub-steps of the process.
Figurens vänstra del visar den enligt exempelvis tyska ut-I läggningsskriften 1 271 274 redan kända fastlimningen av en permanentmagnetring 1 i en skål 2. Medelst någon lämplig limpå- föringsanordning anbringas en limsträng 3 automatiskt på skâlens 2 botten och eventuellt även_på permanentmagnetringen 1. Denna permanentmagnetring 1 införes därefter i skålen É, vilket lika- ledes kan ske automatiskt med hjälp av någon lämplig gripanord-~ ning, samt fastlimmas vid skålens botten. Därefter magnetiseras den i skålen befintliga permanentmagnetringen 1.The left part of the figure shows the already known gluing of a permanent magnet ring 1 in a bowl 2 according to, for example, German Offenlegungsschrift 1 271 274. By means of a suitable glue application device, an adhesive string 3 is automatically applied to the bottom of the bowl 2 and possibly also to the permanent magnet ring 1. This permanent magnet ring 1 is then inserted into the bowl É, which can likewise be done automatically by means of a suitable gripping device, and glued to the bottom of the bowl. The permanent magnet ring 1 present in the bowl is then magnetized.
Parallellt härmed pâföres en limsträng 3 på en ytterligare permanentmagnetring 4, liksom på undersidan av en täckplatta 5., 10 8Û0lr195~7 Permanentmagnetringen 4 fastïimmas därefter på en med me11an- pïatta försedd kärna 6, varefter fäckpïatfan 5 fastïimmas på den så biidade enheten. För centrering av Iuftspalten aibringas en centreringskåpa 7. Den genom Iimningen bildade konstruktionsen- heten, bestående av permanentmagnetringen 4, täckpïattan 5, den meiianpïattsförsedda kärnan 6 och centreringskåpan 7, magnetise- ras därefter. Denna konstruktionsenhet införes därefter i den med den fastïimmade permanentmagnetringen 1 försedda skålen 2, varvid meïianpïattan med kärnan 6 kan fastiimmas vid permanent- magnetringen 1.In parallel, an adhesive string 3 is applied to a further permanent magnet ring 4, as well as to the underside of a cover plate 5. The permanent magnet ring 4 is then fastened to a cored core 6, after which the pocket plate 5 is fastened to the unit thus assembled. For centering the air gap, a centering cover 7 is fitted. The construction unit formed by the gluing, consisting of the permanent magnet ring 4, the cover plate 5, the metal-clad core 6 and the centering cover 7, is then magnetized. This construction unit is then inserted into the bowl 2 provided with the fixed permanent magnet ring 1, whereby the mixing plate with the core 6 can be fixed to the permanent magnet ring 1.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792923865 DE2923865C2 (en) | 1979-06-13 | 1979-06-13 | Method for assembling the individual parts of a low-leakage permanent magnet system for loudspeakers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8004195L SE8004195L (en) | 1980-12-14 |
| SE436162B true SE436162B (en) | 1984-11-12 |
Family
ID=6073105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8004195A SE436162B (en) | 1979-06-13 | 1980-06-05 | PROCEDURE FOR ASSEMBLING THE PARTS OF A LEAKFIELD PERMANENT MAGNET SYSTEM FOR SPEAKERS |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2923865C2 (en) |
| SE (1) | SE436162B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8549733B2 (en) | 2010-07-09 | 2013-10-08 | Shure Acquisition Holdings, Inc. | Method of forming a transducer assembly |
| US8548186B2 (en) | 2010-07-09 | 2013-10-01 | Shure Acquisition Holdings, Inc. | Earphone assembly |
| US8538061B2 (en) * | 2010-07-09 | 2013-09-17 | Shure Acquisition Holdings, Inc. | Earphone driver and method of manufacture |
-
1979
- 1979-06-13 DE DE19792923865 patent/DE2923865C2/en not_active Expired
-
1980
- 1980-06-05 SE SE8004195A patent/SE436162B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE8004195L (en) | 1980-12-14 |
| DE2923865B1 (en) | 1980-11-27 |
| DE2923865C2 (en) | 1981-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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