JPH0654567B2 - Cassette loading device - Google Patents

Description

TECHNICAL FIELD The present invention relates to, for example, a video tape recorder (hereinafter referred to as VTR).
The present invention relates to a tape cassette mounting device for mounting a small cassette among a plurality of cassettes having the same cassette thickness and different reel distances by using an adapter.

2. Description of the Related Art Conventionally, there is a broadcasting digital VTR as a VTR which uses a plurality of cassettes having the same cassette thickness and different sizes, and the cassette is a large cassette 1 as shown in FIG.
It is composed of three types: 0, medium cassette 11 and small cassette 12 (described in Document Technology 3252 Standard for Recording Digital Television Signal-on-Magnetic Tape-in Cassette, published by Technical Center, European Broadcasting Corporation). This cassette has a tape pull-out member insertion portion 1 provided at the front.
5 are matched and both reel stands are moved to their respective positions for direct connection drive.

Problems to be Solved by the Invention However, in the small cassette 12 and the large cassette 10, the inertia and rotation speed of the reel unit are largely different, and in the large-diameter reel motor for the large cassette, which requires high power, the dimension between reels for the small cassette is formed. However, there is a problem that a means such as an adapter is required for mounting the small cassette. A cassette mounting device using a conventional adapter is disclosed in, for example, Japanese Patent Application Laid-Open No. 57-88578.

FIGS. 10 and 11 show a small cassette and a mounting adapter used in a VHS system VTR. In the small cassette 2 mounted in the adapter 1, the supply reel 3 is VT.
The take-up reel 4 is directly coupled to a supply reel base (not shown) of the R main body, and the drive gear 6 ′ that engages with the take-up reel base 6 of the main body is connected from the side through the gear 5. The magnetic tape 7 pulled out from the small cassette 2 is stretched by the pull-out posts 8 and 9 so as to form a predetermined tape path on the front surface of the adapter 1.

In the cassette mounting apparatus using the conventional adapter configured as described above, as shown in FIG. 11, the tape pull-out mechanism, the take-up reel drive mechanism, the small cassette holding mechanism are accommodated in the adapter 1 having the same size as the large cassette. The small cassette 2 is made thinner than the large cassette because it must accommodate the mechanism, etc. However, since the broadcasting digital VTR cassettes are all the same thickness, the small cassette adapter becomes thicker than the large cassette and becomes a large cassette. There is a problem that it cannot be installed in a cassette holder having the same size.

In view of the above point, the present invention has an object to provide a cassette mounting apparatus that can mount a small cassette by using an adapter that is slightly thicker than a large cassette.

Means for Solving the Problems The present invention is a cassette adapter having a small cassette holding mechanism and a small cassette reel driving force transmission mechanism in a body slightly thicker than a large cassette, a cassette holder to which this adapter can be attached, and a large Detecting means for detecting which one of the middle cassette and the adapter is inserted, a reel stand moving mechanism for moving and holding the reel stand of the main body to the large, middle cassette reel position or the adapter driving position based on the detection signal, and the cassette A cassette mounting device including a first mounting device of a reel base unit or a drive mechanism for mounting a holder to a second mounting position lower than the first mounting position.

Action The present invention has the above-described configuration, and drives the cassette holder to the first mounting position when a large or medium cassette is mounted,
When the adapter containing the small cassette is attached, the tape height of all the cassettes can be made the same by driving to the second position.

Embodiment FIG. 1 is a plan view of a cassette mounting device according to an embodiment of the present invention. In FIG. 1, 13 is an adapter main body, and a small cassette 12 is positioned by guide walls 13a, 13b, 13c provided inside the adapter and stoppers 13d, 13e provided on the front surface, and a drawer post insertion portion 15 on the front surface is arranged on the large cassette 10. It is constructed so that the magnetic tape 16 can be pulled out by the same pulling device in conformity with the same insertion portion as shown in FIG. Further, a pair of small cassette reel stands 17a, 17b shown in FIGS. 2 and 4 are rotatably supported on the adapter body 13 by supporting shafts 18a, 18b. The driving force from the reel base engaging bodies 21a and 21b is transmitted through the intermediate gears 20a and 20b that are pivotally supported on one side. Here, the other of the rotating arms 19a and 19b is provided with support shafts 22a and 2a.
The intermediate gears 20a and 20b are pivotally supported by 2b, and the intermediate gears 20a and 20b are crimped by the force of the torsion springs 23a and 23b. An upper lid 24 shown in FIG. A small reel 26 is housed in the small cassette 12 and engages with the small cassette reel stands 17a and 17b. The reel base units 32a and 32b shown in FIGS. 1 and 5 are slidably held by screw main shafts 35a and 35b and guide shafts 36a and 36b, and a bevel gear 33 provided at one end thereof.
a and 33b are connected to the motor 34 via 33c, and the protruding pieces 37a and 37b provided on the reel stand units 32a and 32b emit light, and reel stand detectors 38 and 39a constituted by light receiving elements. When it is detected by b and 40, the driving is stopped and the reel base unit is moved to the large cassette reel position (32a, 32b) shown in FIG. 5, the middle cassette reel position (32a ', 32b') and the adapter position shown in FIG. Deploy. When the reel base units 32a and 32b are arranged at the adapter position, the reel bases 41a and 41b
b engages with the reel engaging bodies 21a and 21b of the adapter to transmit the driving force. Here, two sets of reel stand detectors for a large cassette are provided in order to accurately detect the positions from the middle cassette side and the adapter side. Further, the cassette holder 27 is provided with cassette detectors 42 and 43 and an adapter detector 28 shown in FIG. 7, and the reel type units 32a and 32b are determined by judging the type of the cassette and the adapter inserted by the detection signal. Also move to position. The types of cassettes inserted here and the operating states of the detectors will be described. First, when the middle cassette 11 is inserted, only the detector 42 is turned on and the large cassette 1 is turned on.
When it is 0, both the detectors 42 and 43 are turned on. When the adapter 13 is inserted, 28 is also turned on together with the detectors 42 and 43. 28 is turned on and off depending on the thickness of the cassette, the thickness S of the middle cassette 10 and 11 (first
Only when the adapter 13 (T in FIG. 4) slightly thicker than that in FIG. 2B) is inserted, the detector 28 is turned ON by the lever 29 (FIG. 7) that presses the cassette against the bottom surface of the holder 27. Further, the convex portion 30 provided on the bottom surface of the cassette holder 27 of FIG. 6 is an object for performing centering particularly when the middle cassette 11 is mounted, and guides the groove 31 provided on the lower surface of the cassette. Further, a micro switch 44 is provided on the front surface of the cassette holder 27, and when it is detected that the cassette or the adapter is completely inserted in the holder, the cassette 27 is lowered by the drive mechanism shown in FIG. The reel bases 41a and 41b are engaged with the respective reel or reel base engaging members 21a and 21b. Here, the drive mechanism of the cassette adapter 27 will be described. The worm 4 is attached to the shaft of the drive motor 46 attached to the side plate 45.
7 is provided, the worm wheel 48, the relay gear 4
Drive gear 50 through 9, and drive gear 5
0 is a rack 51 attached to the cassette holder 27
The cassette holder 27 is guided by the L-shaped grooves 52a, 52b, 52c of the side plate 45 and stops at the position of the detector 53 or 54 as shown in FIG. At this position, the cassette is mounted on the reel base unit, and the cassette is stopped at the position of the detector 53 for the medium cassettes 10 and 11, and at the position of the detector 54 for the adapter 13.

The operation of the cassette mounting apparatus of this embodiment constructed as above will be described below. First, a large cassette 10
When the large cassette 10 is inserted into the cassette holder 27, the detectors 42 and 43 detect that they are large cassettes, and the reel base units 32a and 32b are arranged at the large cassette position. And cassette holder 27
When it is completely inserted, the detector 44 operates and the drive motor 46 rotates to stop at the signal of the detector 53 to mount the large cassette 10 on the reel stands 41a and 41b. Next, when the middle cassette 11 is mounted, if it is inserted while guiding the groove 31 on the bottom face of the cassette with the convex portion 30 of the cassette holder 27, only the detector 42 operates and it is detected that it is the middle cassette, and the reel base units 32a, 32b are detected. To the middle cassette position. After that, the middle cassette 11 is mounted on the reel stands 41a and 41b by the same operation as the large cassette.
When the small cassette 12 is attached, the upper lid 24 of the adapter body 13 is opened and then the small cassette 12 is attached and closed and inserted into the holder 27.
28 operates and detects that it is an adapter, and arranges the reel stand units 32a and 32b at the adapter position.
When it is completely inserted into the cassette holder 27, the detector 44 operates and the drive motor 46 rotates, causing the detector 54 to move.
Signal to stop the adapter 13 on the reel stand 41a, 4
Attach to 1b. As shown in FIGS. 9A and 9B, the respective cassettes thus mounted can drive the tape normally with the same height.

As described above, according to the present embodiment, the cassette adapter having the small cassette holding mechanism and the small cassette reel driving force transmission mechanism in the adapter housing 13 which is slightly thicker than the large cassette 10, and the cassette to which this adapter can be attached are mounted. A holder 27 is provided so that the large cassette 10 can be mounted on the reel stand.
Also, all the cassettes can be mounted on the same VTR by changing the height position by an amount different from that when the middle cassette 11 is mounted and mounting.

As described above, according to the present invention, the small cassette 12 of the plurality of types of tape cassettes having the same thickness and different sizes is moved to the small cassette reel position by using the adapter slightly thicker than the large cassette 10. Since the reel base can be mounted without approaching it, the small cassette 12 can be easily mounted even on a VTR for a large cassette equipped with a large-diameter reel motor, which has a great practical effect.

[Brief description of drawings]

FIG. 1 is a plan view of a cassette mounting apparatus of an embodiment of the present invention, FIG. 2 is a plan view of an adapter of the same embodiment, FIG. 3 is a sectional view showing an upper lid mechanism of the adapter, and FIG. FIG. 5 is a cross-sectional view showing the reel drive mechanism, FIG. 5 is a plan view showing a state where large and medium cassettes are mounted in the cassette mounting device of the same embodiment, and FIG. 6 is a convex portion provided in the cassette holder of the same embodiment. 7 is a perspective view showing the groove on the bottom of the cassette, FIG.
FIG. 8 is a side view showing the cassette holder driving mechanism of the same embodiment, FIG. 8 is a side view showing a state where the cassette holder is completely mounted on the reel stand, and FIG. 9 is a height of each cassette mounted on the reel stand. Cross-sectional views showing the relationship, FIGS. 10 and 11 are plan views and cross-sectional views showing a conventional cassette adapter device, and FIGS. 12 a and 12 b show three types of cassettes of the same thickness which are mounted in this embodiment. It is a top view and a sectional view. 12 ... Small cassette, 13 ... Adapter body, 17a, b
... Small cassette reel stand, 20a, b ... Intermediate gear, 21
a, b ... Reel stand engaging body, 27 ... Cassette holder, 2
8 ... Adapter detector, 32a, b ... Reel stand unit, 38, 39a, b40 ... Reel stand position detector, 4
2, 43 ... Cassette detector, 53, 54 ... Cassette holder mounting position detector.

Claims (1)

[Claims] 1. A holding member for holding a small cassette is provided inside a casing slightly thicker than a large cassette, and a transmission mechanism for indirectly engaging with a reel stand of the main body and transmitting a driving force to the small cassette reel. Cassette adapter, a cassette holder to which this adapter and large and medium cassettes can be attached, detection means for detecting whether the large cassette or medium cassette or the adapter has been inserted, and the reel of the main body based on this detection signal A reel table moving mechanism for moving and holding the table to a large or medium cassette reel position or an adapter driving position, and a second mounting position of the cassette holder from the cassette insertion position to a first mounting position of the reel mount unit or a second mounting position lower than the first mounting position. And a cassette holder drive mechanism that reciprocates to the mounting position of the cassette holder. There drives the cassette holder to said first attachment position when the medium cassette is inserted, the cassette mounting device, characterized in that configured to drive the second accommodating position when the adapter is inserted.