DE2243184C3 - Device on magnetic tape recorders for inserting and ejecting cassettes - Google Patents

Description

a) the cassette guide (31) is fixedly attached to the chassis (30), while the drive plate (10) on opposite sides of the Cassette guide (31) from upwardly pointing arms (19, 20 or 21, 22) of the scissors (11, 12) is worn;

b) the front ends of the scissor arms (16, 20 or 17, 22) lying one above the other are guided in slots (18, 23) in the chassis (30) or the drive plate (10); the rear scissor arms (13, 19 and 14, 21) are rotatably mounted accordingly (P, 24);

c) at the rear pivot point (24) of the drive plate (10) the pawl (40) engages jines angled Control lever (38) and holds the drive plate (10) until the control lever swivels (38) at the end of the cartridge insertion movement in its upper position;

d) when the control lever (38) is pivoted , a spring (34) arranged between the chers (at PAj and a tensioning plate (3?)) jumps into its second stable position and guides the drive plate (10) vertically downwards; a main spring (49) is tensioned in preparation for triggering the later ejection of the cassette.

2. Apparatus according to claim 1, characterized in that the clamping plate (33) with a Locking pawl (3S) is coupled, which has a guide (36) into which a driver pin (32) of a engages within the cassette guide (31) lying slide.

3. Apparatus according to claim I and 2, characterized in that the angled control lever can be latched at one end to the driver pin (32) of the slide located in the cassette guide (31) and has a sawtooth-shaped pawl (40) at the other end, by means of the ^r> o plate (10) (F i g. 3), the drive in the rest position is maintained.

4. Device according to one of claims 1 to 3, characterized in that a release lever (43) is provided which can be actuated by an electromagnet (43), and that the release lever (43) with r> a first lever arm (44) in There is operative engagement with a tab (45) of the clamping plate (33) and the latching pawl (35) is released by means of a second lever arm (46).

5. Device according to one of claims 1 to 4, w> characterized in that a main spring (49) is provided which, on the one hand, is connected to the clamping plate (33) is connected and on the other hand against an angled tab (50) of the first lever arm (44) of the release lever (43) is cocked. ■ "

6. Device according to one of claims I to 5, characterized in that between the connection point of the latching pawl (35) with the clamping plate

25th

30th

35

(33) and the driver pin (32) of the slide located in the cassette guide (31) Tension spring (37) is attached

7. cassette magnetic recorder according to claim 3, characterized in that the sawtooth-shaped The pawl (40) of the angled control lever (38) has a lower, long sliding surface (42) via which a Pin (24) of the scissor arms (13, 14) connected to the drive plate (10) the control lever (38) operated during the switch-off phase

The invention relates to a device according to the preamble of claim 1.

Such devices are in the vast majority Cases for cassette magnetic tape recorders intended for use in motor vehicles. For this Area of application results in the requirement that the cassette magnetic tape recorder in a simple manner, d. H. Can be operated with one handle or with one hand and is as small as possible

In a known cassette magnetic tape recorder, the cassette is pushed into a fixed cassette guide and through in the operating position Locking rollers locked By means of a further handle, a drive plate, which carries the drive, is then turned around a pivot point by means of various levers pivoted so that the drive elements of the drive are brought into engagement with the cartridge. A relatively large swivel radius is required in order to avoid that the drive elements of the Drive are tilted in the cassette. Due to this swivel radius, there is a relative elongated cassette magnetic tape recorder, which is poorly suited for combination with a car radio receiver, since the space provided in the dashboard of a motor vehicle is not sufficient.

Another known cassette tape recorder uses a different principle and avoids thereby the relatively large swivel radius. In this known device, the cassette is also in a fixed cassette guide inserted, wherein the cassette is in engagement with a device which a drive plate carrying the drive is raised so that, in the operating position of the cassette, the drive elements are in engagement with the cassette. Here is the drive plate by means of a parallelogram guide, which is arranged on both sides of the cassette guide is raised from below towards the cassette. Since this device has a relatively small swivel radius is required, the device becomes smaller than the cassette type magnetic recorder described above and is also suitable for combination with a car radio receiver.

Furthermore, from the French patent specification 20 40 613, a magnetic tape recorder for playback recorded cassettes known, in which a scissors acting in the vertical direction brings a playback device into engagement with a cassette. Included a cassette is pushed completely into a cassette lift with the help of the scissors lowered vertically. The base of the shaft in which the cassette is lowered corresponds to complete footprint of a cassette. In addition to the considerable space required for lowering the cassette

this known arrangement has the disadvantage that during the lowering of the cassette the various Magnetic heads and drive elements on the drive plate are completely led out of the lowering space must be perpendicular to the direction of movement of the cassette and the cassette lift. The one here occurring large strokes require a complex, space-consuming control device.

Since the space available in the dashboard of motor vehicles, which is used for the installation of a radio is present but is getting smaller, it is necessary to have an even smaller cassette type magnetic recorder to build, especially for a combination with a car radio receiver.

The invention is therefore based on the object, avoiding any pivoting movement of the Antriebplatie, a cassette magnet device with optimal To create dimensions with regard to the overall height, depth and width.

This task is carried out by the Claim 1 specified features solved.

Further advantageous, structural refinements can be found in the subordinate claims.

The invention has the advantage that due to the height adjustment of the drive plate, and not the cassette, the cassette only has to be pushed into the cassette device by approximately four-quarters of its base area. There is thus a smaller shaft compared to the known arrangements required for lowering the drive plate. In addition, this results in a space-saving control device for the playback means.

Furthermore, the device is put into operation by the inserted cassette, whereby a second Handle with which the device is normally switched on is not required.

Further advantages and details of the invention are given below with an exemplary embodiment in FIG the drawing described with reference to figures. From the figures shows

F i g. 1 the formation of the scissors and the storage the drive plate in the scissors,

2 the control of the scissors in a schematic representation by a control device,

F i g. 3 the magnetic cassette device in the switched-off position,

F i g. 4 the magnetic cassette device in the operating position and

5 shows the magnetic cassette device during the switch-off phase.

In Fig. 1, an adjustable drive plate 10 is drawn, which is mounted in scissors 11, 12. Here, two opposing scissor arms 13, 14 are mounted in a main pivot point P of a stationary chassis, which is not shown in FIG. 1 for reasons of clarity. The two scissors 13, 14 are sufficiently rigidly connected to one another by a connecting strut 15 so that sufficient synchronization of the two scissors 11, 12 and thus also good parallel guidance of the drive plate 10 is achieved stored in the fixed chassis, while the scissor arms 19, 20 of the scissors 11 and the scissor arms 21, 22 of the scissors 12 are rotatable on the longitudinal sides of the drive plate 10, on the scissor arms 19, 21 and attached to the scissor arms 20, 22 in further elongated hole guides 23 . Furthermore, the scissor arms 19, 21 point in the fastening points on the drive plate 10

nor guide pins 24, whose function is explained in more detail in the figures described below, in a driving point P _A, the cutters 11, 12 is engaged to a control device that controls the movements of the cutters 11,12 This control device and its function is based on the F i G. 2 to 5 described.

It should also be mentioned that the drive plate 10 is a

lu drive, as well as recording and playback elements of a cassette magnetic recorder, on their representation for reasons of easier clarity the features essential to the invention have been dispensed with.

In Fig. 2 is the control device in the interacting functional sequence with the scissors Ii, 12 and the Drive plate 10 shown schematically Since both long sides of the magnetic cassette device are the same are structured, the representation is limited and

in description on a ropes.

A stationary chassis 30 has on the lower part a cassette guide 31 in which a slide with a driver pin 32 is arranged. A pivotable clamping plate 33 is mounted on the chassis 30 at a pivot point P \ and is connected to the scissors 11 at the control point Pa via a coupling element, in this example a spring 34. Furthermore, the clamping plate 33 is connected to a latching pawl 35 which has a guide 36 into which the driver pin 32

jo of the slide lying within the cassette guide 31 engages. A tension spring 37 is attached between the connection point of the clamping plate 33 with the latching pawl 35 and the driver pin 32. An angled control lever 38, which is mounted at the end of the cassette guide 31 in a pivot point Pi , is designed on one side as a locking lug 39 which is locked with the driver pin 32 of the slide and has a sawtooth-shaped pawl 40 on the other side, which has an upper, short sliding surface 41 and a lower, long sliding surface 42 on which the guide pin 24 of the scissors 11 is guided. In addition to the parts described so far, the control device also has a release lever 43, which via a first lever arm 44 with a tab 45 of the clamping plate

4Ί 33 interacts and via a second lever arm 46 acts on the latch 35 and is mounted in a pivot point / * j in the chassis 30. The release lever 43 is actuated on a contact surface 47 by an electromagnet 48. As the main energy store of the control device

Vi device is a main spring 49, the one hand with the Clamping plate 33 and on the other hand via an angled Lanpsn 50 with the first lever arm 44 of the Release lever 43 is connected. A cassette 51 is in the cassette guide when it is not pushed in 31 drawn.

The functional sequence of a cassette magnetic sound device according to the invention is explained below with reference to FIG. 2 and FIGS. 3 to 5.
The following requirements must be met here;

1. It must be ensured that when pushing of the cassette 51, the drive plate 10, the drive and the recording and playback elements only after reaching the operating position

■ ι the cassette (Fi g. 4) is lowered.

2. The cassette 51 must be in the operating position (Fig. 4) be locked.

3. When you turn off the cassette tape recorder

It must be ensured that the drive plate 10 returns to the rest position and the cassette 51 is ejected.

4. The cassette 51 may only be ejected when the drive plate 10 has moved away from the cassette 51 completely resolved.

5. The magnetic cassette recorder must be switched off when

a) a switch-off button is operated,

b) at the end of the belt,

c) in the event of disruptions in the conveyor belt and

d) if the supply voltage fails.

All of these requirements are met by the magnetic cassette device according to the invention.

In the resting class, the scissors take 11 and the Control device the position shown in Figure 3. The cassette 5i is not in the cassette guide 3t inserted, the latch 35 is at its front stop, and the clamping plate 33 holds over the Tab 45 and the first lever arm 44 the release lever 43 with the contact surface against the electromagnet 48. Furthermore, the drive plate 10 lies in its upper end position on the upper, short sliding surface 41 of the control lever 38 on.

If a cassette 51 is inserted, it takes the slide within the cassette guide 11 ίπγ! - so also the driver pin 32 with.

The electromagnet 48 is switched on and holds the release lever 43 in its position. By means of the driver pin 32, which is mounted in the guide 36 of the latching pawl 35, the latter is also moved in the direction of the cassette to be inserted. As a result, the clamping plate 33 pivots about the pivot point P ₁ , whereby the tab 45 moves upwards. When the operating position of the cassette 51 is reached, the driver pin 32 runs onto the locking lug 39 of the angled control lever 38 and pivots the control lever 38 about the pivot point Pi in such a way that the guide pin 24 is released from the upper, short sliding surface 41 of the control lever 38. The driver pin 32 engages in the locking lug 39 of the control lever 38, the cassette has reached the operating position. During the pivoting out of the control lever 38 is released, the drive plate 10 and the clamping plate 33 caused by the upward rotation a jumping of the coil spring 34 in the 34 'designated location and the voltage of the main spring 49. Since the coil spring 34 at the driving point Pa of the scissors 11 attacks, the scissors 11 collapse, the drive plate 10 is lowered. The drive plate 10> assumes the position 23 ', 24' in the lowered state. This state is the operating state of the magnetic cassette recorder and is shown in FIG. 4 can be found.

If the magnetic cassette device is switched off by one of the points a - d mentioned under 5., the

κι drive plate 10 brought back into the rest position and the cartridge 51 ejected. This process is illustrated in FIG. 5 described.

The electromagnet 48 receives no more voltage and releases the release lever 43. This swings

r> by the force of the main spring 49, which acts via the angled tab 50 on the first lever arm 44 of the release lever 43, around the pivot point Pi and presses with the second lever arm 46 on the latch 35, which is also deflected downwards

in latch 35 slides through the guide 36 on the Driving pin 32 up to its front stop, and the tension spring 37 is tensioned because the main spring 49 relaxes further and the clamping plate 33 pivots back, which in the rest position by means of the tab 45

r> acts on the first lever arm 44 of the release lever 43 and the release lever 43 with the contact surface 47 again pivots against the electromagnet 48 in readiness. By the spring 34, which due to the movement of the clamping plate 33 jumps (Fig. 1),

w the drive plate 10 is raised. The guide pin 24 slides over the second, long sliding surface 42 of the sawtooth-shaped pawl 40 of the control lever 38. As a result, the control lever 38 is pivoted about its pivot point P2 and releases the locking lug 39 from

Ji the driver pin 32. The tension spring 37 can now relax by pulling the driver pin 32 through the guide 36 of the latch 35. Because the driver pin 32 is connected to a slide which is arranged within the cassette guide 31, the

■ »<> Cassette 51 ejected. The drive plate 10 lies with the guide pin 24 on the upper short sliding surface 41 of the sawtooth-shaped pawl 40 of the Control lever 38 and thus in the rest position according to FIG. 2. The magnetic cassette recorder is turned off ί and prepared for re-commissioning

In addition 5 sheets of drawings

Claims (1)

15 claims: 1. Device on magnetic tape recorders for inserting and ejecting cassettes, with a An arrangement consisting of scissors for inducing automatic vertical movement between a cassette guide and a drive plate carrying the drive, characterized by the combination of the following ι ο Characteristics: