DE1462191A1 - speaker - Google Patents

Description

Patent attorney

Dipl.-Ing. Th. Hoefer

This. Act. Z. 1957/65

. Hill *

48 Bielefeld, the

Cross tightening 32

Telephone 61836 ■ Telex 9-32449 Bank account: Commerzbank AG, Bielefeld Postal checking account: Hanover Office No. £ 8928

JL

ROLEN DIVERSIFIED INVESTORS, INC., Stockton, California, USA

"Speaker"

The invention relates to an electric loudspeaker of the type used to transmit sound to a sufficient extent to generate a sound-modulated current that is passed through a radio, an electronic sound generator or the like Source connected amplifier is supplied.

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The object of the invention is to create a loudspeaker or a drive motor that is light and can be manufactured and assembled economically.

According to the invention is a loudspeaker with a essentially rigid (rigid) or stationary device provided on which a protruding therefrom Support is attached, on which a drive motor is arranged, which has a vibration device, which on a sound-modulated ^ the drive motor supplied current responds; Furthermore, a connecting device is provided between the Vibration device and the rigid device acting as a sound emitter of the loudspeaker switched on is and is thus in a vibration-transmitting contact.

According to a further preferred feature of the invention, a novel drive motor unit is preferred provided with motors of the symmetrical two-pole magnetized type, which generates the vibrations.

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In a preferred embodiment, it still exists the rigid or stationary device made of a wooden board or wooden plate such as a door panel or the like, on which the drive motor unit for generating τοη vibrations is arranged that of the wooden board or the like. Be emitted as sound.

Exemplary embodiments of the invention are shown in the drawing. It show t

Pig «1 is a perspective view of a drive motor unit arranged on a door panel as a loudspeaker,

fig · 2 shows an enlarged cross-section through the same Loudspeaker according to section line 2 - 2 in KLg. 1,

Fig. 3 shows a horizontal axis through the same loudspeaker according to section line 3-3 in Pig «2 _f

Fig. 4 shows a vertical line through the same loudspeaker corresponding to section line 4-4 in Pig «3.

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Pie drawing with the details reproduced on it shows a drive motor unit - which is one of the components of a loudspeaker - »with one somewhat elongated, right-edged housing designated 1, which has an upper wall 2, side walls 3, has a bottom 4 and a rear wall 5.

The upper wall 2 is provided on its end face with an upwardly curved fastening flange 6, while the bottom 4 also has a fastening flange 7 on its end face. These two Befe8tigung8lel§ä & * § »6, 7 are auegestattet with Löohern for receiving fastening screws 8 which these flanges 6, 7 and the housing 1 at the Aussenfläohe 9 is an" extended _f substantially rigid Hole board Io maintain that at a Door, another wall or the like, is preferably arranged in the form of a hollow construction. Because it is fastened in this way to the wooden board Io, the housing 1 protrudes from it at a right angle.

The side walls 3 of the housing 1 end shortly before the outer surface of this Holebrettee Io | the

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Flans 6 and 7 are thus the only parts of the housing 1, which the outer surface 9 of the wooden board Touch Io.

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Two drive motors of the symmetrically bipolar magnetized type are arranged next to one another on the housing 1; one of these drive motors is designated by 11 and the other by 12. Since the drive motors 11, 12 are designed identically, is the special description of a? of both.

Each drive motor 11, 12 contains an elongated, rod-shaped, rectangular cross-section Fexmamentmagneten 13, which is provided with upright pole plates 14 on its opposite sides j is the lower part of these pole plates 14 extends over the entire length of the rod-shaped perna- »Demagnetize 13, while the upper part of these pole plates 14 is shortened in length and in the middle area, as shown, sioh extends.

A winding 15 becomes.-Τρρη «a plastic coil 16 carried around the rod-shaped magnet 13

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and also arranged between the pole plates 14 in the central region; this coil-supported winding 15 is with its axial. Gap 17 supported horizontally and -extends in the longitudinal direction of the housing 1. Dpe coil 16 is clamped between the upright pole plates 14 with the interposition of an annular gap 18 which is provided between this coil and each of the pole plates.

In the horizontal plane of the axial gap 17 within the coil 16 are the upright pole plates 14 with opposite ^ bent vertically inwards front pole pieces 19 and with opposite, vertically inwardly curved rear pole pieces 2o fitted. The front pole shoes 19 end at a distance at the adjacent or free ends of the pole plates 14. The rear pole shoes 2o are the same! Way spaced. So attached they take front pole pieces 19 a position at a distance from the Winding 15, while the rear pole shoes 2o have a position at a distance from the rear of the winding 15 take in.

An elongated soft iron anchor 21 extends sioh with space through the axial gap 17 in the through Coil 16 carried winding 15.

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At its rear end, the armature 21 is in one elastic abutment 22 made of soft rubber or the like embedded. This abutment 22 is fastened by means of screws to a transverse plate 23, which is between the rear pole pieces 2o extends. Spacer rings 25 are arranged on the screws between the rear pole pieces 2o and the transverse plate 23;

The armature 21 is raised directly above the winding 15 the opposite sides of two sliders detected in such a way that it back and forth in the longitudinal direction can move, d. H. can swing; for this purpose, the sliding pieces 26 are attached to the corresponding ones by means of screws 27 Aufreolit standing pole plates 14 screwed. The sliding edges the Gleitetüoke 26 are relatively sharp and hold in vertical grooves 23 in the corresponding Side surfaces of the armature 21 a.

At its front end, the armature 21 has a front side orderly Einsteokbohrung 29 provided, which the rear bath of an axially protruding pin · 3ö receives, which in the Einsteokbohrung 29 duröh a Seti screw 31 is held

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This pin 3α carries dne one-piece in the middle relatively heavy, perpendicular to its longitudinal direction standing, enlarged Schfeu.be 32.

An elongated probe or needle 33 is with its rear end on the Schjfe & be 32 by insertion and securing mounted in an inclined bore 34 near the periphery thereof. The hole 34 is inclined in such a way that the needle 33 is in an inclined position with respect to the extended axis of the pin ' 3o extends; the needle 33 is so long that its tip is at a certain distance from the pen 3o as this ends and runs parallel to it.

The axial pin 30 shows at its front end a narrow head 35 'which has a flattened surface 36, which runs with parallel spacings to the needle 33 and lies in the central region of the needle 53.

A distance cylinder 37 let «wipe the outer one upright pole plate 14 on the adjacent one Side wall 3 of the housing 1 switched on! these

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Pole plate 14 is fastened to the side wall 3 by a retaining screw 38 which extends in a longitudinal direction 39 can move.

With the exception of the rod-shaped Per * iaifent magnet 13 » the pole plate 14 »the pole shoes 19 and 20 and the armature 21 are the parts of the drive motor described above essentially made of non-magnetic material

The above-described drive motors 11 and 12 are arranged side by side and fixed by cross bolts 4o connected with each other.

The windings 15 are connected in parallel to a pair of lines 41 passing through these windings a hole 42 in the rear wall 5 is led out of the housing 1 are. These lines 41 are extended with an amplifier (not shown) connected, the a sohall-modulated stream to the

above
Lines and att £ these at the same time to the windings

15 leads.

After the housing 1 on the outer surface 9 dee extended Let wooden board Io attached in the manner described above, the retaining screws 38 are loosened and

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the drive motors connected as a unit 11 and 12 aligned in the housing 1 in the longitudinal direction until the needle 33 is against the Outer surface 9 of the wooden board Io places and lightly touches it. The retaining screws 38 are then tightened again and the drive motor unit is in working position for cooperation with the wooden board Io, which is the sound emitter or transmitter of the Loudspeaker forms.

If a sound-modulated current flows simultaneously through the lines 41, the drive motors 11 and 12 of is fed to an amplifier, the induced on the armature 21 by the windings 15 are Vibrations transmitted through the needle 33 to the wooden board · The wooden board Io can be due to the Vibrations Sound waves with such sufficient strength arise to be in the space or in the Near the wooden board, for example, in a room in which the wooden board is part of a door or Wall forms to generate sound with sufficient strength. The sound emitted by the wooden board

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Sound (tone) generated by radiators is not only strongly modulated in its volume and uniformly, but also full in its scope, "broad in its Resonance and not directed directly. The volume (the strength) of the sound can be changed by changing it of the current supplied by the amplifier can be set

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Claims (8)

Claims l.j loudspeaker, characterized in that one of them pending on a rigid device Support is arranged with a drive motor, one of which is fed to a sound-modulated him Has current responsive vibration device,. and that a connecting device between them Vibration device and the rigid device acting as a sound emitter of the loudspeaker is switched on and'thus in vibration-transmitting Touch stands. 2. Loudspeaker according to claim 1, characterized ι that a wooden plate, a wooden board (panel) is provided as a rigid or stationary device. 3 «loudspeaker according to claims 1 or 2, daduroh marked that a * oscillating armature is provided, which od perpendicular to the wooden plate. The like. Extends. -13- 809808/0563 -13- 4. Loudspeaker according to claims 1 "to 3> characterized in that as a visual vibration transmitting Device a needle is provided, which is at one end of the vibration device protrudes lengthways. 5. Loudspeaker according to claims 1 to 4, characterized in that the drive motor is mounted so as to be adjustable by means of an adjusting device in the direction of the wooden plate or the like. 6. Loudspeaker according to claims 1 to 5 »characterized in that the armature in the direction on the wooden board or the like. Extended and ends at a distance therefrom and one at its end as well Ending at a distance in front of the wooden plate, a vertical disc having pin carries and the needle which transmits visual vibrations is fastened in the outer region of the disc} inclined to it runs and the wooden plate or the like. Touches. 7. Loudspeaker according to claims 1 to 6, characterized in that the carried by the pen Disc is relatively heavy. -14- 8. Loudspeaker according to claims 1 "to 7» thereby characterized in that the needle extends in the upper region of the disc of the pin, which with is provided with a flattened surface parallel to the needle. . Drive motor unit for a loudspeaker according to Claim 1, characterized in that the wooden board forms the sound emitter and the magnet armature of the Motor ends in front of the wooden board and the vibration-transmitting device at the end of the armature is attached and touches the wooden plate. Io. Loudspeaker according to Claims 1 to 8, characterized in that that two drive motors are connected to form a drive unit. 809808/0563