DE2428270A1 - RECORD PLAYER - Google Patents

Description

Dr.-lng. Wooden houses Dipl.-Met. Goltitnch

^K Patent Attorneys 1 * 6 / LU

i605OFFi £ r-! BA'CL: AMMAIN Herrnsiraßa 37 -TeIe-On 88 83 84

Yugen Kaisha Watanabe Kenkyusho No. 371, Ozenji, Tama-ku, Kawasaki-shi, Kanagawa-ken, Japan

¹¹ turntables "

The invention relates to a small record player which is easy to use and particularly simple in design.

Record players have been known for a long time and accordingly the demands placed on them are more or less complicated. The invention is based on the object of a particularly easily constructed and particularly small turntable to create, with the drive mechanism and the assembly of the device are simplified by omitting a number of parts.

The invention is described in more detail below with the aid of an exemplary embodiment which is shown in the drawing.

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Show:

Fig. 1: a side view of the turntable according to the invention on average at standstill;

FIG. 2: a sectional view as in FIG. 1 after the device has started up; FIG.

FIG. 3: a sectional view along the line B - B in FIG. 2;

Fig. 4: a sectional view along the line A - A in Fig. 2;

Fig. 5i is a view of the device from the right in Fig. 2, with the housing wall removed unrL

Fig. 6: a top view of the device.

In order to achieve the object on which the invention is based, a record with the turntable is first provided according to the invention integrated in that a tone groove cut directly into the surface of the turntable provided with a record is that, secondly, the turntable is set freely rotatable on an axis of rotation in order to dispense with a power transmission device from the motor that the turntable is depressible, making contact at its periphery directly with the rotating engine output shaft,

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thirdly, that the motor is mounted on a shaft which engages in the central part of its housing, so that it is around this Shaft can swing around the two rear ends of the engine Lift electrical cables so that they come into contact with live cables when the engine is running is pivoted at the beginning and that fourthly the assembly of the device is simplified by the fact that on soldered connections is dispensed with inside the housing. These improvements result in an excellent, small in format, simplified turntable with a small number of parts.

According to FIG. 1, the turntable according to the invention has a housing 1, which consists of an upper housing part 1a and a lower housing part.1b. A turntable 3 is with provided with a tone groove cut into its surface. He carries a cylindrical made of hard rubber Ring 3b on its circumference and sits with sufficient play on an axis 4, which extends on the left side into the middle area of the lower housing part 1b extends. A cylindrical one serves as a bearing on the turntable Part 3a as an essential part. The upper end of a

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turn the device serving rod 6, which is with the turntable 3 is freely rotatably connected in the region of the end of the axis 4, protrudes from an opening 5 of the upper housing part 1a, wherein the rod 6 used for switching on is fastened below the opening 5 at one end of a support plate 7 is, the other end of which is attached to the right rear surface of the upper Gghäuseteils 1a so that it is after is movable up and down.

Right in the middle part of the lower housing part 1b a motor 8 is arranged in such a way that its output shaft extends below the turntable 3. The motor 8 is in one arranged cylindrical holding part 9, which is carried by projecting pins 11 between the bearing plates 1o and holding plates 14 are set. The bearing plates 1o are parallel to the long sides and the bottom of the lower housing part 1b, while the retaining plates hang down from the upper housing part 1a. The motor 8 is able to oscillate around the protruding pins 11 and a leaf spring 15 engages at one end which is screwed to the bottom of the lower housing part 1b. .

Two electrical conductors 16 and 16 'emerge from the rear of the Mfcor

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out and can contact L-shaped contact pieces 17 and 17 'arranged facing one another when the motor 8 is pivoted will. The contact pieces 17 and 17 'are arranged at the right end of the lower housing part 1t) and provide a electrical contact with conductors 16 and 16 'when pivoting of the engine 8.

In the middle part of the case there is a tonearm 2o, one end of which has a cylindrical bearing part placed on the floor on one side of the lower housing part 1b 3o while the other end can swing freely. A coil spring 19 acts on the tonearm 2o and is on the one hand attached to a spring shoe 22 on the lower housing part 1b and engages on the arm 2o on one Spring shoe 21, which is arranged on its central part. As a result, the spring 19 continually pushes the tone arm from one Recess 12 in the middle of the turntable 3 away. The feather 19 finally surrounds a spring rod 18 on top of the cylindrical Bearing part 3ο

At the bottom of the free. The end of the tonearm 2o is one Tip or a pickup 23 attached and one for sound transmission Serving projection 24 is arranged on the upper side of the tone arm.

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kenische On the ceiling of the upper housing part 1a there is a criche Intermediate wall 25 is arranged, the bottom part of which is firmly connected to a reinforcement plate 26 with the aid of adhesive. The projection 24 serving for sound transmission is arranged so that it is in communication with the fixed part. A stop 29 for the arm 2o is located between the turntable 3 and the motor 8 inside the lower housing part 1b.

The handling of the device according to the invention is described in detail below. The conductors 17 and 17 'become first connected to a suitable battery 28, and when the rod 6 used for switching on, then with a finger is depressed, the lower end of the rod 6 pushes the turntable 3 also downward. Since the turntable 3 outside seated on the axis 4 in contact with the lower end of the rod 6 used for switching on, the hard rubber ring pivots 3b the motor output shaft 13 protruding to the bottom around the protruding ones Pin 11 and presses the leaf spring 15 downwards. Simultaneously with this pivoting process of the motor output shaft 13 the conductors 16 and 16 'move on the rear side of the motor upwards and come into contact with the downward-facing upper surfaces of the facing, L-shaped contact pieces 17 and 17 '' so that an electrical connection is made. This in turn

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the turntable 3 is transferred from the output shaft 13 of the motor the hard rubber ring 3b driven. When the turntable 3 moves downward, the pickup 23 emerges from a recess 12 and at the same time the tonearm moves 2o up to the Stop plate 29 due to the action of the helical spring 19, since the pickup is mounted somewhat away from the turntable is. As soon as you let go of the rod 6 with your finger, the pickup 23 enters the tone groove 2 and moves there to Center. In the meantime, the projection 24 on the arm 2o, which serves to transmit the tones, makes contact with the Reinforcement plate 26, thereby reducing the vibrations of the pickup 23 can be transferred to the partition to complete the reproduction. Spbald the pickup 23 in the Recess 12 falls, the motor output shaft 13 moves due to the action of the leaf spring 15 upwards, which leads to Torture has the conductors 16 and 16 · at the same time move down, whereby a separation of the contact pieces 17 and 17 'and at the same time an interruption of the current flow takes place so that the engine stops.

From Figures 1 and 2 it is clear that the Turntable 3 can move upwards on the axis 4, if the needle or the pickup 23 penetrates into the recess 12,

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whereby the pivoting movement leading to the power interruption of the motor is initiated.

Reference numeral 27 in the drawing in Fig. 6 denotes a window that is in large numbers in the upper surface of the upper Housing part 1a is provided.

The device according to the invention can be manufactured in a particularly small format. There are no soldered connections required inside the housing, so that assembly is easy, especially since the number of parts compared to the conventional Devices is very low.

The structure inside the device is clear and straightforward and ensures a long service life without errors.

Above all, the pressure on the pickup is very important and is achieved by a spring. This pressing force is constant, so that the reproduced sound is always clear and pleasant to the ear, so that an excellent effect at a very simple turntable.

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! Finally it should be pointed out that the switch-on

rod 6 with a rod part 6a on the turntable 3 anj
engages, wherein the rod part 6a carries at its free end, the axis 4 laterally encompassing projections 6b. The rod ί part 6a and the projections 6b together form a fork which touches the turntable 3 with its free ends.

The maintenance rod 6 is preferably with the rod part 6a rigidly attached to the support plate 7. This means that the switch rod 6 in Figure 2 according to the inclination the support plate 7 would have to be slightly inclined, although this is not shown. The one having the projections 6b However, the fork-shaped part of the switch rod 6 always engages the turntable 3 or the upper end of the cylindrical Part 3a of the turntable 3 and does not slide about in the annular recess 12 in the surface of the turntable 3 adjoining the cylindrical part 3a.

The projections 6b can be slightly over with their outer contour protrude the scope of the rod part 6a and merge at a paragraph in this, as indicated by the dashed line Fig. 1 and 2 can be seen.

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The support plate 7 can finally together.mit the switch-on rod 6 and the rod part 6a with the projections 6b be formed in one piece, this either by one-piece Manufacture by injection molding or by subsequent connection can be done.

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Claims (6)

Expectations: ./ Turntable with an oval housing, marked by an intermediate wall (25) for reproduction in an upper housing part (la) and one that can be moved up and down Turntable (3) and a pivotable motor (8) and a tone arm (2o) in the lower housing part (1b). 2. Record player according to claim 1, characterized in that a record is integrally connected to the turntable (3) and a tone groove is cut directly into the surface of the turntable. 3. Record player according to claim 1, characterized in that the turntable (3) sits on a rotation axis (4) which is attached to the bottom of the lower housing part ^ b), that a rod (6) serving for switching on can be depressed from the outside and is elastically attached to the upper housing part (1a) via a support plate (7) and is used to press a hard rubber ring (3b) located on the circumference of the turntable onto the output shaft (13) of the motor (8) so that the motor is in bearing plates (io and 1ο ¹ ) is pivotably mounted and on its rear side protruding conductors (16 and 16 '), which when pivoting with contact pieces (17 and 17') 409883/0894 ~ ² ~ ■ * - ■ can be connected to produce a current flow, so that the motor starts up and drives the turntable (3) . 4. Record player according to claims 1-3, characterized inL that the motor (8) is mounted pivotably about an axis lying transversely to the output shaft (13), that a spring deart acts on the motor housing that the output shaft (13) is pressed against the turntable that the turntable is axially displaceable on its axis of rotation and that the turntable with the help of a spring-loaded i Shift rod is displaceable in the axial direction. 5. A disc player according to claims 1-4, characterized ^{gekennzeich-:} net that the tone arm (2o) only around an axis is pivotally connected to the pickup (23) and in a direction as ί stop for the axially displaceable turntable (3); serves. 6. Record player according to claims 1-5, characterized in that the turntable (3) has a recess (12), that the pickup (28) runs into the recess (12) and that the turntable (3) is supported by a spring applied is displaceable in the axial direction. 409883/0894 Lee rs e i t e