DE3035981C2 - Device for magnetic tape cassettes - Google Patents

Description

The invention relates to a device for magnetic tape cassettes for sound and image recording or Playback, the reversible magnetic tape cassette that can be used in the device has two winding cores for Aufbzw. Having unwinding a magnetic tape in a cassette housing, and in the cassette housing on both flat sides between the winding cores a window-like opening for a view of the tape reel is available.

Magnetic tape cartridges and associated devices are known in which the cartridge is window-like Has opening through which the tape roll in the cassette housing can be viewed. From the DE-OS 09 987 a tape cassette is known which has a marking field in the form of a color strip along the window-like cassette opening and in which Due to the different colors depending on the tape roll diameter, the various pieces of clay that have been played can be recognized. The same applies to tape recorders for using such cassettes known that in the slot of the device into which the cassette is to be inserted. Facilities are available which clearly show the magnetic tape in the cash register. These facilities consist of the simplest Made of a film that is inserted in the Gcriit opposite the window-like cassette opening in order to to improve the difference between the tape wrap and the device background. Is also known instead of the Use a small rectangular mirror with the foil, which improves the reflection of the incident light. From AT-PS 2 55 789 is also one Lighting device known, which is arranged in the area of the cassette window in the device and also the better possibility of observing the magnetic tape in the cassette by making the magnetic tape visible in the cassette housing it is possible to see on which side of the winding core the The beginning of the magnetic tape or the full magnetic tape roll is located. The previously known different Marking information on the cassette and the tape recognition devices with direction information on However, the device has the disadvantage that the user of the device only needs to consider the markings must be evaluated before the cassette is inserted into the device in the desired and correct position

The invention is based on the object of a device

for creating magnetic tape cartridges at the instant when inserting the cassette you can see whether these in the desired and correct position in the device is located

In the case of a device, this task is the one in the generic term of claim 1 defined genus according to the invention by the features in the characterizing part of the Claim 1 solved

The invention is explained in more detail with reference to the drawings. It shows

F i g. 1 shows a schematic representation of a cassette insertion shaft without a cassette in the marking field in a device which is only sketchily drawn Fig. La is a representation similar to FIG. 1, however with a changed marking of the marking field,

Fig. 2 and 2a a representation w »c Fig. 1 and la, but with the 4n cassette and

F i g. 3, 3a, 4 and 4a a representation like FIG. 2 and 2a, but with differently shown position and Diameter of the tape roll.

The F i g. 1 shows an indicated in outline KAS 4 ^r> settengerät 1, which has a Kasscttcn-insertion slot. 2 In this cassette insertion shaft there are two driving mandrels3 which are used to drive the winding cores of a magnetic tape cassette inserted in the device. Furthermore, a capstan 4 is indicated in the insertion shaft, which serves to constantly drive the magnet bar of the tape cassette. All other functional parts of the device are omitted from the figure for the sake of simplicity of illustration. A rectangular marking field 5 is attached to the bottom of the cassette-in-place 2 between the two driving pins. The marking field 5 has two different letters 6 for subdivision and for differentiation purposes. According to the example shown, an A and an E, whereby the letter A z, B, for the designation · W) voltage beginning of the tape and the letter E for the designation of the end of the tape can be selected.

In Fig. La the marking area 5 is divided in color, namely like this. that one half 7 green and the other half 8 of the Markicrungsfeldcs laid out red

b'i is

FIG. 2 shows the device 1 with a cassette slot 2 and an inserted magnetic tape cassette 9, which is on the two flat frames between

the tape winding cores 10 has a window-like opening U. The opening 11 shows on the one hand the letter A as shown in the illustration and on the other hand a tape roll 12 located in the cassette. Since the tape roll 12 completely covers the letter £, the device user can immediately see that the tape is in the cassette at the beginning and in the correct position for a desired device-on taking or playback operation

From FIG. 2a, the correct position of the tape cassette inserted in the device for the beginning of the tape at the beginning of the device game operation can be recognized not by the letter A, but by the green-colored half of the marking field5.

The F i g. 3 and 3a show a tape roll in the cassette, which covers only part of the marking field 5 on both sides, with the change of the letter or the color change from green to red while the belt is running indicates the belt center.

From FIG. Is 4 and 4a is to detect an inserted into the unit cassette in which during the Sp, dbetriebes the magnetic tape has arrived at the end, CDCR a newly inserted cartridge in position runs in the device inserted in Figure 4 is therefore the letter E (end of tape ) fully recognizable and F i g. 4a shows the red-colored half of the marking field 5 as a warning that the cassette has been incorrectly inserted into the device

The marking field 5 can be designed in various ways in the device. So is an additional tape length detection still possible through differently graduated color marking. It is still useful that Illuminate the marking field.

1 sheet of drawings
35

40

Claims (5)

Patent claims: 1. Device for magnetic tape cassettes for sound and image recording or playback, the reversible magnetic tape cassette in the device having two winding cores for winding or unwinding one Has magnetic tape in a cassette housing and in the cassette housing on both Rachseiten A window-like opening is provided between the winding cores for a view of the tape roll, characterized in that the Device (1) in the contact surface for the flat side of the magnetic tape cassette (9), opposite and in the Area of the window-like opening (11) of the inserted cassette (9), a marking field (5) of this type comprises that the side of the beginning or the end of the magnetic tape or any intermediate areas any ball winding diameter can be differentiated depending on the tape length in the recording or playback mode of the device. 2. Apparatus according to claim I, characterized in that the marking field (5) is rectangular Has shape and is arranged between two driving mandrels (3) which engage in the winding cores (10) of the cassette (9). 3. Apparatus according to claim 1 or 2, characterized in that the marking field (S) is divided into two equal areas. 4. Apparatus according to claim 3, characterized in that the two areas of the marking field (5) by coloring », numbers, letters or by a Combination between Fartxn, letters and numbers are distinguishable. 5. Apparatus according to claim 3 or 4, characterized in that in each case a region of the subdivided Marking field (S) can be covered alternately by the tape roll (12) in the cassette (9).