EP0687128B1 - Schwingspule und Verfahren zu ihrer Herstellung - Google Patents
Schwingspule und Verfahren zu ihrer Herstellung Download PDFInfo
- Publication number
- EP0687128B1 EP0687128B1 EP95107541A EP95107541A EP0687128B1 EP 0687128 B1 EP0687128 B1 EP 0687128B1 EP 95107541 A EP95107541 A EP 95107541A EP 95107541 A EP95107541 A EP 95107541A EP 0687128 B1 EP0687128 B1 EP 0687128B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- voice coil
- voice
- ultrasonic welding
- wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/041—Centering
Definitions
- the invention is concerned with the production of Voice coils for speakers, especially with the high temperature resistant connection of the individual Wire turns of the voice coil with each other or with a voice coil former.
- voice coils from Speakers generally formed so that a metallic, mostly made of copper Coil wire first with an insulating layer and then is covered with a layer of baked lacquer before it Wire to form the voice coil around a carrier is wrapped.
- a so-called voice coil former act who when he provided the voice coil is connected to the speaker diaphragm.
- the carrier has only that Function of a mandrel, of which the Voice coil pulled after its manufacture and as such is connected to the speaker membrane.
- Both versions have in common that if the Turns are wound around the corresponding carrier, these are subjected to a temperature process in order to a connection of the turns with each other and / or the Manufacture voice coil former.
- This Temperature process can be designed so that first by means of a current surge through the Coil winding a pre-fixation is achieved and then to establish the final strength of the via the baked enamel the connection Voice coil is subjected to an annealing process. If the winding around the respective carrier Coil winding already has sufficient stability, can be carried out before the tempering process Pre-fixation by the surge is also eliminated.
- the invention is based on the object Specify voice coil which is up to about 400 degrees Celsius is temperature stable, as well as a To specify manufacturing processes for voice coils, according to which high temperature resistant voice coils quickly and can be trained less energy-intensive.
- Is according to claim 1 which also in the prior art known insulating layer of the voice coil wire a high temperature resistant polymer material and are the ones in contact with each other Areas of insulation layers of different Turns of the coil with each other ultrasonically welded, is a high temperature resistant Given the turns of the coil, without a further coating of the insulation of the Voice coil wire with baking varnish is necessary.
- the insulation can too to connect the coil to the Voice coil former can be used without the Voice coil former has a special coating for Establishes the connection.
- the voice coil former at least in the area with the turns the coil is also provided with a high temperature resistant polymer material coated, the voice coil wires with the Voice coil former using the Ultrasonic welding technology particularly strong and high temperature resistant (up to about 400 degrees Celsius) connect with each other.
- a particularly good and high temperature resistant connection between voice coil wire and voice coil former is reached when at least the area of the Voice coil former, which with the Voice coil wire is wound with a high temperature resistant polymer material coated becomes.
- a baked varnish coating can have even according to the prior art Voice coil former, which is used in baking lacquer technology Find use, a baked varnish coating can have.
- FIG. 1 is a section through a Voice coil former 10 perpendicular to Paper plane extending speaker axis 11 shown.
- This voice coil former is tubular and in the present case is made of aluminum.
- the feasibility the invention neither on the use of a Voice coil former 10 still on the use of Aluminum as a material for the voice coil former 10 is limited.
- the applicability of the Arrangements formed according to the invention do not Limited applications where temperatures of prevail over 150 degrees Celsius.
- the voice coil wire 13 which in the present case is made of Copper is formed, has a diameter D of about 250 ⁇ m and has an insulating layer 15 encased.
- the thickness d of this insulating layer 15 is about 50 ⁇ m.
- This insulating layer is in the present case from a high temperature resistant Amide-imide polymer material formed. With this up about 400 degrees Celsius temperature resistant
- the outer jacket 12 is also an amide-imide polymer material of the voice coil bobbin 10 coated. This with 16 designated insulation layer is only in the area the outer jacket 12 of the voice coil bobbin 10 which of the voice coil wires 13 or the coil 14 is covered, and has also a thickness of 50 ⁇ m.
- Figure 1 which the voice coil former 10 in shows wrapped condition, makes it clear that after the voice coil wire 13 around the voice coil former 10 is wound, the insulating layers 15, 16 lie together. To a high temperature resistant and stable connection of up to this point only wound coil wires 13 with each other and with the To effect voice coil former 10, the Insulating layers 15, 16 with each other ultrasonically welded. To realize the Ultrasonic welding of an embodiment according to the figure 1 and to ensure adequate Insulation of the coil wires 13 after welding should the thickness d of the insulating layer 15 and the Insulating layer 16 is not below 20 microns.
- the connection process of voice coil former 10 and wound coil 14 is closer in Figure 2 shown.
- the tubular voice coil former 10 is in a bracket 17 is used.
- This bracket encased the outer jacket 12 of the voice coil former 10 except for a narrow area 18.
- the bracket 17 can with the voice coil bobbin 10th already during the winding of the coil wire 13 be connected.
- the narrow one Area 18 for limiting the winding width B of the Coil 14 on the outer jacket 12 of the Voice coil former 10 can be used.
- Can too during the winding of the coil wire 13 around the Outer jacket 12 is a mandrel (not in Figure 2 shown) the inner cross section of the Fill in the voice coil bobbin 10.
- the one with the reference number 19 in FIG. 2 The electrode forms the so-called sonotrode Ultrasonic welding arrangement.
- the insulating layers 15, 16 (FIG. 1) of voice coil former 10 and voice coil wire 13 by means of the electrode 19 and the Counter electrode 20 formed Ultrasonic welding arrangement with each other ultrasonically welded.
- Ultrasonic welding arrangement can also be such are used in which the counter electrode 20 is not completely on the surface of the coil 14 is applied and the rotatable sonotrode 19 with velvet the voice coil bobbin 10 and the coil 14 for Welding the coil wires 13 together or with the voice coil bobbin 10 on the counter electrode 20 moved over.
- the ultrasonic welding process is on an assembly Completed according to Figure 2, for example Front part 17.1 of the holder 17 in the direction of the arrow P3 removed and the with the voice coil bobbin 10th connected coil 14 in the direction of arrow P3 Arrangement can be taken after the segments of the Counter electrode 20 in the direction of arrow P2 from the Coil 14 have been lifted off.
- Figure 3 is an arrangement for forming so-called voice coil carrier-free coils 14.1 shown. Under such coils 14.1 are understood where the the coil wires 13.1 forming coil wires 13 without the presence of a voice coil former 10 connected with each other and as such with the Speaker membrane (not shown) connected become.
- connection of a strapless coil 14.1 the arrangement according to Figure 3 is such that those discussed in connection with Figure 1 Voice coil wires 13 around the outer jacket 21 of the Electrode 19 are wound.
- the area of Electrode 19, which is coated with the coil 14.1 should be very smooth-walled and / or with a release agent to be coated to form a connection the insulation 15 with the outer jacket 21 of the electrode 19 to prevent during the welding process.
- the electrode 19 are then the segments of the counter electrode 20 on the wound coil 14.1 lowered and the individual coil wires 13 on each other in Touching insulation 15 under the effect of Connected to ultrasonic welding technology strapless coil 14.1 in the direction of arrow P3 the electrode 19 are withdrawn after the Segments of the counter electrode 20 from the coil 14.1 were lifted off and the front part 17.1 of the Bracket 17 has been removed. Also in The embodiment according to FIG. 3 forms the electrode 19 the sonotrode of the ultrasonic welding arrangement.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Description
- Figur 1
- einen Schnitt durch einen Schwingspulenträger;
- Figur 2
- einen Schnitt durch eine Verschweißanordnung; und
- Figur 3
- eine weitere Darstellung gemäß Figur 2.
Claims (8)
- Schwingspule für Lautsprecher,
mit einem metallischen Draht (13), der von einer Isolierschicht (15) umgeben ist und dessen die Spule (14) bildenden Windungen miteinander verbunden sind,
dadurch gekennzeichnet,daß die Isolierschicht (15) aus einem hochtemperaturfesten Polymer-Material gebildet ist, unddaß die die Spule (14) bildenden Windungen an ihren miteinander in Berührung stehenden Bereichen der Isolierschicht (15) durch Ultraschallschweißung der Isolierschichten (15) verbunden sind. - Schwingspule nach Anspruch 1,
dadurch gekennzeichnet,daß die Spule (14) um einen rohrförmigen Schwingspulenträger (10) gewickelt ist, unddaß die Isolierschichten (15) der Spulendrähte (13) nach dem Ultraschallschweißen gleichzeitig auch die Spulendrähte (13) mit dem Schwingspulenträger (10) verbinden. - Schwingspule nach Anspruch 2,
dadurch gekennzeichnet,
daß der Schwingspulenträger (10) zumindest in dem Bereich, um welchen die Spule (14) gewickelt ist, mit einer Isolierschicht (16) aus einem hochtemperaturfesten Polymer-Material versehen ist. - Schwingspule nach Anspruch 1 oder Anspruch 3,
dadurch gekennzeichnet,
daß die Isolierschicht (15; 16) von Schwingspulendraht (13) und/oder Schwingspulenträger (10) aus einem Amid-Imid-Polymer-Material gebildet ist. - Verfahren zur Herstellung von Schwingspulen
gekennzeichnet durch folgende - in der zeitlichen Reihenfolge angegebene - Schritte:1. Schritt: Beschichten des metallischen Spulendrahtes (13) mit einer Isolierschicht (15) aus einem hochtemperaturfesten Polymer-Material;2. Schritt: Wickeln des beschichteten Spulendrahtes (13) um einen Wickeldorn zur Herstellung einer Spule (14);3. Schritt: Plazieren von Sonotrode (19) und Gegenelektrode (20) einer Ultraschallschweißanordnung in dem Bereich des Wickeldorns, in dem die Spule (14) gewickelt worden ist, wobei die Spule (14) zwischen den Elektroden (19, 20) angeordnet ist;4. Schritt: Ultraschallverschweißen der Isolierschichten (15) des Spulendrahtes (13) miteinander; und5. Schritt: Abziehen der miteinander verschweißten Spulendrähte (13) vom Wickeldorn. - Verfahren nach Anspruch 5,
dadurch gekennzeichnet,
daß der Wickeldorn von der Sonotrode (19) oder der Gegenelektrode (20) der Ultraschallschweißanordnung gebildet wird. - Verfahren nach Anspruch 5 oder Anspruch 6,
dadurch gekennzeichnet,daß auf den Wickeldorn vor dem zweiten Schritt ein Schwingspulenträger (10) aufgeschoben wird,daß die Isolierschichten (15) der Spulendrähte (13) miteinander und mit dem Schwingspulenträger (10) durch die Ultraschallverschweißung gemäß Schritt vier verbunden werden, unddaß der Schwingspulenträger (10) im mit der Spule (14) verbundenen Zustand vom Wickeldorn abgezogen wird. - Verfahren nach Anspruch 7,
dadurch gekennzeichnet,
daß der Schwingspulenträger (10) zumindest in dem Bereich, welcher mit dem Spulendraht (13) bewickelt wird, vor dem Bewickeln mit einem hochtemperaturfesten Polymer-Material beschichtet wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4419252 | 1994-06-01 | ||
| DE4419252A DE4419252A1 (de) | 1994-06-01 | 1994-06-01 | Schwingspule und Verfahren zu ihrer Herstellung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0687128A1 EP0687128A1 (de) | 1995-12-13 |
| EP0687128B1 true EP0687128B1 (de) | 2000-04-19 |
Family
ID=6519589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95107541A Expired - Lifetime EP0687128B1 (de) | 1994-06-01 | 1995-05-18 | Schwingspule und Verfahren zu ihrer Herstellung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0687128B1 (de) |
| JP (1) | JPH0847088A (de) |
| AT (1) | ATE192010T1 (de) |
| DE (2) | DE4419252A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT404206B (de) * | 1996-11-20 | 1998-09-25 | Harman Int Ind | Verfahren zur herstelllung von spulen |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3963882A (en) * | 1975-03-14 | 1976-06-15 | Control Data Corporation | Boron or graphite reinforced voice coil and manufacturing process |
| US4048713A (en) * | 1975-06-09 | 1977-09-20 | Mogens Hvass | Method of making compact electric coils |
| DE3247941A1 (de) * | 1982-12-24 | 1984-06-28 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Lautsprecher |
| JPS61226000A (ja) * | 1985-03-30 | 1986-10-07 | Totoku Electric Co Ltd | 超耐熱ボイスコイルの製造法 |
| US4825533A (en) * | 1985-10-11 | 1989-05-02 | Pioneer Electronic Corporation | Method of making a voice coil with rectangular coil wire and foil leads |
| DE3635152A1 (de) * | 1986-10-15 | 1988-04-21 | Hoegl Helmut | Elektromagnetische anordnung, insbesondere elektromagnetische wicklung |
| JPH02283200A (ja) * | 1989-04-25 | 1990-11-20 | Matsushita Electric Ind Co Ltd | スピーカ用ボイスコイルの製造法 |
-
1994
- 1994-06-01 DE DE4419252A patent/DE4419252A1/de not_active Withdrawn
-
1995
- 1995-05-18 EP EP95107541A patent/EP0687128B1/de not_active Expired - Lifetime
- 1995-05-18 AT AT95107541T patent/ATE192010T1/de not_active IP Right Cessation
- 1995-05-18 DE DE59508182T patent/DE59508182D1/de not_active Expired - Lifetime
- 1995-06-01 JP JP7135484A patent/JPH0847088A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0687128A1 (de) | 1995-12-13 |
| JPH0847088A (ja) | 1996-02-16 |
| DE59508182D1 (de) | 2000-05-25 |
| ATE192010T1 (de) | 2000-05-15 |
| DE4419252A1 (de) | 1995-12-07 |
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