JPH0424784B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette adapter, and more particularly to a cassette adapter for a small cassette that allows the use of a small cassette in a recording or reproducing apparatus for a large cassette.

In this type of cassette adapter, there is a
It is necessary to pull out the recording medium from the small cassette and place it inside the adapter. However, since the recording medium is exposed from the small cassette, removing the small cassette from the adapter at this time may damage or stain the recording medium, which is undesirable.

In view of the above points, the present invention provides a cassette adapter that can reduce the number of parts as much as possible, and that can securely press and fix a small cassette to the adapter while a recording medium is being pulled out from the small cassette, and prevent its removal. It provides:

As an example of this type of cassette adapter, a cassette adapter for a magnetic recording/reproducing apparatus (hereinafter referred to as VTR) will be described below. FIG. 1 is a diagram showing an example of a large cassette. 1 is a cassette half provided with reels 2 and 3. 4 and 5 are tape guides. A magnetic tape 6 is wound and loaded on the reels 2 and 3. FIG. 2 is a diagram showing an example of a small cassette. 7 is a cassette half with reels 10 and 11, and 8,
8', 9, 9' are tape guides, and 12 is a magnetic tape.

FIG. 3 is a diagram showing an embodiment of the cassette adapter of the present invention. 13 is a cassette adapter body. When the small cassette 7 is inserted into the adapter, the drawer guides 14 and 15 are in the positions indicated by A and B, respectively, in FIG. Loading lever 1
6 in the direction shown by the arrow 17, the levers 18 and 19 which interlock the drawer guides 14 and 15 are moved.
rotate in the directions of arrows 20 and 21 about fulcrums 18a and 19a, respectively. 22 and 23 are control pins that control the rotation of the levers 18 and 19;
It is provided on the levers 18 and 19. 24,2
Reference numeral 5 designates a long groove portion provided in the loading lever 16 into which the control pins 22 and 23 are fitted. Similarly, in order to control the moving direction of the loading lever 16, control pins 26 and 27 are installed in the main body 13.
The loading lever 16 is also provided with long grooves 28 and 29 into which the two fit. As a result, the magnetic tape 30 is pulled out to a predetermined position when a large cassette is used. 31 is loading lever 1
This is a lock lever that fixes the 6. The tip of the lock lever 31 is fitted into the lock grooves 32 and 33 provided in the loading lever 16 by a spring 34 to lock the loading lever 16 from moving. 35
is an opening/closing lid that holds and secures the small cassette 7 from above.

FIG. 4 is a detailed view of the lid fixing mechanism that detects whether or not the magnetic tape is pulled out in FIG. 3 and fixes the opening/closing lid 35. The opening/closing lid 35 is rotatable in the direction of an arrow 37 around the supporting parts 36a and 36b. Before the magnetic tape 30 is pulled out, the loading position detecting protrusion 38 provided on the loading lever 16 is located in the groove 39 of the opening/closing lid 35. Therefore, the opening/closing lid 35 can rotate freely.
The small cassette 7 can be taken in and out. magnetic tape 3
If 0 is pulled out even a little, as shown in Figure 3,
Since the protrusion 38 and the groove 39 are misaligned and the opening/closing lid 35 is fixed, the small cassette 7 cannot be taken in or taken out.

Further, when the VTR is operated with the small cassette 7 in the cassette adapter inserted as described above, the idler 40 is driven. When the idler 40 is driven, the idler 41 linked thereto is also driven and the reel 11a is
rotates. The operation when unloading, that is, when returning the drawer guides 14 and 15 to their original positions A and B will be explained below. First, the loading lever 16 is moved in the direction of the arrow 17'. Then, unlike when pulling out the magnetic tape 30, lever 1 is pressed.
8 and 19 are rotated in the directions of arrows 20' and 21', respectively, and returned to positions A and B. At this time, magnetic tape 3
The reel 11a must be rotated so that it does not slacken due to surplus zeros. FIG. 5 is a diagram showing details of the magnetic tape winding mechanism. When the loading lever 16 moves in the direction of arrow 17', the rack gear 45 attached to a portion of the loading lever 16 moves in the direction of arrow 46 as shown in FIG. Then idler 40
A gear 42a provided on another idler 42 that is interlocked with the idler 42 is engaged with the idler 42 to rotate the idler 42. As a result, idler 40, idler 4
1 rotates, and the reel 11a ends up being the magnetic tape 30.
Rotates in the direction of winding up. The rotational speed of the gear 42a is set so that the magnetic tape 30 can be wound sufficiently. However, to prevent excessive winding, when a certain amount of force is applied to the magnetic tape 30, the rack gear separates from the gear 42a against the force of the elastic body 14 shown in FIG. 43 is a rotation fulcrum of the rack gear 45. Conversely, when the magnetic tape 30 is pulled out, the rack gear 45 and gear 42a slip and do not engage with each other, so the pull-out guides 14, 1
Since only the minimum amount of the magnetic tape 13 is pulled out by the lever 5, the magnetic tape does not become loose.

According to the above configuration, when a small cassette is inserted into or removed from the adapter, the position of the device that pulls out the magnetic tape is detected. The opening/closing lid 35 that presses the top surface of the small cassette can be rotated only when no magnetic tape is pulled out, and if the magnetic tape becomes loose or is exposed from the small cassette, the opening/closing lid 35 can be rotated. The magnetic tape can be protected because it cannot be taken in or taken out and the magnetic tape is not wound loosely depending on the position of the drawer.

FIG. 6 is a diagram showing another embodiment of the cassette adapter of the present invention. The loading lever 16 is provided with recesses 47a and 47b as shown in FIG.
Furthermore, when it is not pulled out, it is fixed in the recess 47b. FIG. 7 is a side view showing this lid fixing mechanism. FIG. 7 shows a state in which the convex portion 49 is fixed to the concave portion 47a, and the control lever 48 is biased by a spring 51 attached to the adapter body. As a result, a portion 50 of the control lever 48 is pressed against the opening/closing lid 35, and the opening/closing lid 35 is fixed. When the loading lever 16 moves in the direction of the arrow 17' and the magnetic tape 30 is wound into the small cassette 7, the convex portion 49 is now fixed in the concave portion 47b. Then, the control lever 48 moves in the direction of arrow 52 in FIG. 7, and the opening/closing lid 35 becomes rotatable about the fulcrum 36, allowing the small cassette 7 to be taken in and out. The configuration shown in FIG. 6 can also provide the same effects as the configuration shown in FIG. 3.

In the embodiments shown in FIGS. 3 and 6, the detection of whether the magnetic tape is being pulled out is performed mechanically. However, it can also be detected electrically. For example, loading lever 16
When a motor is provided in the adapter body 13 as a drive source, a detection protrusion is provided on the loading lever 16, and the position of the detection protrusion can be detected using a photocoupler. A fixing mechanism for the opening/closing lid 35 is electrically interlocked with this detection means. Electrical detection is also possible as described above.

As explained above, according to the present invention, when the recording medium is being pulled out from the small cassette, the movement of the opening/closing lid that presses the top surface of the cassette is prohibited, so the small cassette cannot be inserted into or taken out of the adapter. Therefore, the tape-shaped recording medium can be protected without providing a dedicated cassette lock mechanism for the cassette and adapter.

[Brief explanation of drawings]

Fig. 1 shows an example of a large cassette, Fig. 2 shows an example of a small cassette, Fig. 3 shows an embodiment of the present invention, and Fig. 4 shows the lid fixing mechanism in Fig. 3. 5 is a detailed view of the recording medium winding mechanism in FIG. 3, FIG. 6 is a view showing another embodiment of the present invention, and FIG. 7 is a detailed view of the lid fixing mechanism in FIG. 6. be. 7 is a small cassette, 13 is a cassette adapter main body, 16 is a loading lever, 18 and 19 are levers linked to the loading lever 16, 35 is an opening/closing lid, 36 is a pivot point for opening/closing the lid, and 38 is for detecting the loading position. The protrusion 39 is a groove on the rotating lid.

Claims (1)

[Scope of Claims] 1. Information on a tape-shaped recording medium in a small cassette is transmitted to a recording or reproducing device that records information on a tape-shaped recording medium in a large cassette or reproduces information from a tape-shaped recording medium in a large cassette. In order to record or reproduce information from a tape-shaped recording medium in a small cassette, a cassette adapter to which the small cassette is attached is movable in the direction in which the small cassette is attached, and suppresses the upper surface of the attached small cassette. an opening/closing lid that is fixed; a drawer member that pulls out the tape-shaped recording medium in the small cassette; and a lid fixing mechanism that works in conjunction with the pulling member and fixes the opening/closing lid when the tape-shaped recording medium is being pulled out from the small cassette. A cassette adapter comprising: