DE8132321U1 - SOUND RECORDING AND PLAYBACK DEVICE FOR PLANE CARTRIDGES - Google Patents

Description

SGFA-GBVXERT AG XBVKRKDSStI
CAMERA-WERK MUNICH
Patent vsa *

CW 2571.8 MP 11/04/81

51-hl-pr-stü, 0548C

Sound recording and playback device for flat sound carriers

The invention relates to a sound recording and reproducing device for level, preferably arranged on the back of paper images Sound carrier with a spiral, by means of a circumferential in the radial direction adjustable sound head, scannable sound track.

Facilities with these generic features are known and for the most diverse Purposes applied. It does not matter whether the sound recordings were made as needle or Hagnettone recordings or in whatever other way they are created. The difficulties with such devices are that the image and at the same time the sound carrier is preferably also stationary relative to the optical devices for an optically observable reproduction of the image on the Sound-image carrier, while the pickup of the device and the sound-image carrier move relative to one another when playing the sound recordings.

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It is necessary that the sound head aligns itself with the spiral-shaped sound recording track moved on a spiral path. Known devices developed for this are structurally complex and expensive and also not always functionally reliable, as the drive gear required for the tape head has a large number of functional parts that are relatively difficult to manufacture contains. This resulted in the object on which this invention is based, namely to create a sound recording and reproducing device, which requires the least possible effort and has a robust construction and, above all, is always functional

This object is achieved in that in a sound recording and Playback device with the features of the generic part of claim 1 according to the invention the measures listed in its characterizing part are hit. Refinements of the invention are laid down in the subclaims.

It is apparent that the sound recording and Playback device consists of mechanically simple components that can be produced without great effort. The structural design is such, that no problems can arise during operation and that proper functioning is ensured even by the technically inexperienced user is.

The invention is based on an exemplary embodiment with reference to the drawings explained «In the drawings represent

1 shows a cross section through the device according to the invention, Fig. 2 is a plan view, Fig. 3 is a side view of the device and Fig. 4 is an electrical circuit diagram.

CW 2571.8 MP

The back of the sound carrier-coated paper image 1 is through leading edges 2a. ·· 2c Positioned above a head plate 3, which is also the head The paper image 1 is supported by support cams 4, which are also designed as a ririg-shaped support centered on the head plate axis 3a could be. The Tonkopfeller 3 carries a rotatable and resiliently mounted Tonearm 5 with the sound head 6 · A spring 7 is arranged so that it pulls the tape head up to rest against the back of the paper image 1, which is coated with a carrier. It also pulls him outwards with a force component away from the head plate axis 3a.

The Toniarm "S has a guide pin Sa, which is inserted into one in the housing fixedly arranged spiral guide groove (8) engages. Through a transparent hold-down cover 9, the head 6 is held so that the guide pin 5a cannot rise from the guide groove 8. The clutch is only engaged when the hold-down cover 9 is open or is being opened the guide pin moves out of the guide groove 8, and the tonearm 5 swings outwards. The electrical connections of the audio head are routed via sliding contacts 6a to an amplifier (not shown). Of the Incidentally, the amplifier can be arranged partially or entirely on the head plate 3 be, so that there are more favorable current-voltage ratios for the sliding contact points.

As can be seen from Fig. 2, the picture 1 with the sound carrier to the Leading edges 2a ... 2c created. If the image is correctly positioned in the position embodied by the guide edges, switches D, Ξ closed, which in turn connects a circuit to an electronic display device conclude. Preferably, light emitting diodes indicate that the image is correctly positioned. Then he can Lid 9 can be closed.

The head plate 3 is driven by a motor drive wheel 10 via an intermediate wheel 11 and a belt drive 12 are driven. Pulls a solenoid 13 the

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Coupling 14, so the motor drives the belt 12 directly, supported by a pressure roller 15. This is the operating state in the case of a fast return. When playing the sound recordings, the sound head 6, guided by the spiral 8, runs from the outside to the inside and opens switch B at the end of the spiral. This switch turns off the motor and amplifier. With the lid 9, which is opened to take pictures, the switch A opens at the same time. The switch A ¹ closes. This closing of A ¹ causes the solenoid 13 to be energized and the motor 10 to start Return to its starting position. There the tonearm 5, which has now jumped outwards, opens switch C with its nose 5a, which then switches off both the motor and the magnet 13. When a new image is inserted, the tonearm 5 is pressed down again into the guide groove 8, a good coupling being possible through an integrally formed funnel-shaped extension 8a at the beginning of the guide groove.

The side view of the device shown in Fig. 3 shows above all the double-acting switch A / A ¹ and a bolt 16, by means of which the cover 9 is held in the closed operating position.

That in Fi $. 4 shown circuit diagram of the device requires no further Explanation; the switches D and E provide the supply of the light-emitting Diode 17. When the switch A is closed, the motor and the amplifier 18 are switched on. By arranging a Diode 19 prevents the lifting magnet 13 from being energized. Opens switch B, the motor and amplifier are switched off again. If the switch A 'is now closed, the motor 10 and solenoid 13 for a fast reverse powered. The diode 20 prevents the amplifier from being supplied with current. Is 4-way switch C through the nose 5a on the tonearm 5 (Fig. 2) that has jumped outwards is open, so the supply is of the motor 10 and the solenoid 13 again interrupted.

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Claims (4)

AGFA-GEVAERT AG LEVERKUSEN CAMERA-UERK NyNCHEN Patent and Licensing CW 2571.8 MP 17.03.82 51-hl, 0731C G 81 32 321.2 Claims 1. Sound recording and playback device for flat sound carriers, preferably arranged on the back of paper images, with spiral-shaped soundtracks that can be scanned by means of a circumferential, radially adjustable sound head, characterized in that the sound head (6) is on a turntable moved by a drive motor (10) (3) is arranged on a resiliently and rotatably mounted tonearm (5). 2. Sound recording and playback device according to claim 1, characterized characterized in that the audio head (6) is guided by means of a guide pin (5a) which scans a spiral guide groove (8). 3. sound recording and playback device according to claim 1 and 2, characterized in that at the beginning of the guide spiral (8) A funnel-shaped widening (8a) is formed as a coupling aid is. • · · · I Il I ··· ·· cw 2571.8 MP; ■ ·: ·; . ⁵ ·:. "·: ·· · g si 32 321.2 > 1 I » »■ 4. Sound recording and playback device according to claim 1 to 3, characterized in that the end of the guide groove (8) is a Drive movement of the motor (10) controlling switch (B) is assigned. For this purpose 2 sheets of drawings \ ■ CU 2571.8 MP G 81 32 321.2 mi ■ ·