DE1955944U - ELECTRO-DYNAMIC SOUND CONVERTER WORKING ON THE SUBMERGED COIL PRINCIPLE. - Google Patents

Description

P1-B017111-15.7.66

H. SEILER, J. PFENNING

Dl PLOM-INGENIEUR E PATENT LAWYERS

July 15, 1966

1 BERLIN 19 ff / U *

Oldenburgallee 1O
Telephone: QA 55 21/22 Teleoramm address! Sellwehr patent

Piriaa Holmbörg & Co., t Bexlia

Straö «" i> «

"Do that

more working,

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prinuip Arbeittitiiaen, t; i.t4itrü ~ djriamiöcheri tichallwanüler, aer as i-III-rophon, & 1ε Lautöprechyr _f as Hürsi- and üei-feleichen

can.

beatehea im & llgemeln & ii üuss eini

-iea ^ raii, tiuem Möicbr & nüorb, appropriate, gege a Seatrieruaei UNAE a dao from Onea K ^ rmxii ^ uiateiL with pole plate una e ^ nem ice ma £ * is netiiichea Bueksciiluü stinaicGieigesttst 1 & Ί Before dei brewing in sllgemaiaea eiü Peckei mxg & QXuuet _f animal sum SdLalluiiirciitritt on v / aiiät on the lexeius side as

for the M. # mbra3i dieat. In many cases the Beekale are also with -dem before the Jäemfera ". located in Hoiilraua

With such, after, the fauehspulenpriruzip working Sound transducers consist in the Hegel of the membranes a piece having an outer part and an inner part, the rope lying coil with the aid of centering means, is glued to the membrane «Bs are also such membranes known »where the outer part and the bobbin look like one piece} in this case the inner part of the Membrane can be attached subsequently by sieving · In addition a membrane form for loudspeakers has also become known, where the outer part, the bobbin and the inner part are in one Form a unit · With these membranes only the inner part serves for sound radiation, Ba due to the relatively small sound radiation area of the inner part of the membrane Degree of effectiveness e is very low «, is this memorial form in the Used in connection with a! Funnel "

The invention is based on an electro-dynamic sound transducer which works according to the pig coil principle and has a one-piece membrane that forms an outer part, the coil body and the inner part. The invention is based on the object of increasing the sound absorption while at the same time increasing the size of the construction, so that the result is a sound wave that has increased sound radiation and requires the smallest possible number of individual parts and operations during manufacture.

■ • ♦ • / 5

Biee will © rfinaungegeaäB äaäurcJb. reached, üaß SSr outside seat des Meaibmn for sound recording fezw. Sound & radiation is used. The fact that the outer part of a membrane is inserted Sound radiation or sound absorption is used « calibrate a much larger swirl radiation area than with the named export forum »whereby the .energy of sound

for this form of membrane erosion is increased to such an extent that

proposed

The judge is superfluous.

Another feature of the Erfinäiing is that the lid of the "converter supports the magnet _t with openings suq öchalluurchtritt provided iet uiad aue soft-magaetisciieia material ua a bargain of jaagnetiecheii EucicechlusaeE biicie-t. In the case of an inventive design, the magnet is located on the front side of the membrane and is attached to the request of the label. »The lid itself is made of soft magnetic material and forms a rope of the magnetic racket System that acts as a magnet! »Rather serving a buffalo closure ©» aue which-maenetiecheia material beetehenöe iron pot can be connected to the membrane basket by overmoulding, pressing in or the like 1 »which« also avoids the required execution form- ·

Another feature of the invention is characterized by the fact that that the base of the transducer serves as a bearing for the membrane and consists of a pulling part, the su.saiamen with the converter cover serves as a magnetic lock »

It is also essential that the openings aes cover © in a known way eo are dimensioned »that they along with that formed over the front of the membrane Cavity to form a Helmholtz resonator

Finally, »the 4-way lid and the bottom of the Wendlere “on the outer edge by ruffling are connected to each other »At the junction between the lid and. the floor, the two together * forming the magnetic gullet, there are no noteworthy occurrences magnetic losses on «there you see connection on the outer diameter of the transducer is »where the Touch area large and. thus the flow density is small is »especially» if the market exchange rate causes a permanent connection is established *

Egg © accompanying drawing represents an example Execution »Xoria represents the invention»

As can be seen from the drawing, it forms a membrane with i & reia outer part 14 »the bobbin 15 and the inner part 16 one unit. The Einepalt 1? » In which the voice coil 12 is immersed, is through the Kernma®neten

pole
with its itokiplatte 13 and the bottom 3 of the case.

Magnetic Kiicköchluß takes place via cover 2 "in which the openings 6 for the passage of sound are located and above the lower housing part 3". The housing base 3 simultaneously serves as a support and centering for the membrane. Membrane with a tele awiechen Bruckringöe% the

Lid 2 and the bottom 3 of the transducer kept a good magnetic transition . erielen, the connection between the cover 2 and the base 3 is made alternately by bordering «

The holes 6 of the cover 2 can with the above

18th
Membrane weräexu formed 4 located cavity / as a Helmholtz resonator to ErecLuettEgaiigbeelnfluseting Similarly Vieiee the bores 7 can in Gehäueeboden 3 with the cavity below the diaphragm 19 ^ 4 els tor Resona- serve ^k "Further, by suitable dimensioning of the cavity 23 below the Inner part 16 of the membrane 4

■ if the open air can be influenced «In addition, behind the ά & η Börhung © EL 7 of the floor © 5 © in damping material 8 * can be attached, since © in« AMeekplatte 9 ext the housing boaen 3 is pressed ·

In the embodiment shown, provided with Bodenfcontaktea, the Innexikontakt 10 is through the Iaoliex- discs ti against the housing bocion 3 insulated. The ends

10 2Of 21 of the voice coil are at the Inneateonta & t resp. the external contact 20 connected to the cover plate 9 is connected.

The connections of the voice coil 12 thin in the known » also spawns on eyelets or strands, as shown be guided.

In the case of the 4 © s ferfinished converter al © Microphone sum use In handsets, the effect is an ingredient in the »llgeiaeinsa of untex-geoxdaeter importance, <ta the beat prevention rate is small let and eomit a sound pressure a relatively high amount of pa is required on the membrane Spj / aliincluittioji in this case nods ßöitr is big »can öer lid and 4-way housing boöea made of thin be producedea. Furthermore, instead of the with pole plate 15 a simple magnet without JPolpi & tte * Will be applied, w * o <iureh oil «parts production and you Ko & tage considerably ^ simplified.

■ k

Claims (4)

PA.-BO1711M5.7.6B claims 1. Haeh the leek coil principle working, ice Loudspeakers, listeners and the like serving electrodynamic Sound transducer ι consisting of an annular gap - * magnet system and one made from one piece, a ** Outer part, a bobbin and a membrane forming an inner part, characterized in that the outer part the membrane for sound absorption or sound radiation serves. 2. Sound transducer according to claim 1, characterized in that the bevel of the transducer carries the magnet, with openings is provided for the passage of sound and consists of soft magnetic material and a file of the magnetic Forms an inference lake; 3. Schallwandier according to claim 1 and 2 »characterized that the bottom of the transducer serves as a support for the membrane and consists of a drawn part, which together with serves as a magnetic return path for the converter back 4. Converter according to claim 1 to 3 »characterized in that the openings of the lid in known: *? Way so βώ * that si ©
Yox & he "elt" the Memtoaa geMldetea HoiiLraum 3 »aeHaUmnAKir naofc claim 1 to 4, thereby The pedestal and the body of the river bask at the start Börderlung milseiaaiider verb «aÄ« i ·:; * ■■ ;;: ■■ - ■ 4