JPH0654566B2 - Cassette mounting 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 that 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 consists of three types: 0, medium cassette 11 and small cassette 12 (Document Technology 3252 STANDARD issued by European Broadcasting Corporation, Technical Center).
FOR RECORDING DIGITAL TEL
EV ISION SIGUNAL ON MAGUN
E TIC TAPE IN CASSETTES). In this cassette, the tape pull-out member insertion portions 15 provided in the front portion are aligned with each other, and both reel stands are moved to 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. 8 and 9 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 a supply reel stand of the VTR main body (not shown). Drive gear 6'which is directly coupled to the take-up reel 4 and engages with the take-up reel base 6 of the main body.
Is connected from the side through a gear 5, and the magnetic tape 7 pulled out from the small cassette 2 is stretched by pulling 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. 9, a tape pull-out mechanism, a take-up reel drive mechanism, a small cassette holding mechanism are provided in the adapter 1 having the same size as the large cassette. The small cassette 2 has to be accommodated in a mechanism and the like, but the small cassette 2 is made thinner than the large set, but 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 which can mount a small cassette by using an adapter slightly larger than a large cassette.

The present invention relates to a cassette adapter having a small cassette holding mechanism and a small cassette reel driving force transmission mechanism in a housing slightly larger than a large cassette, a cassette holder to which this adapter can be attached, and a large cassette. A frame member that fills a gap between the cassette holder and the cassette holder at the time of mounting, a detection unit that detects whether a large or medium cassette or an adapter has been inserted, and the reel base of the main body is set to large or medium based on the detection signal. The cassette mounting device includes a reel base moving mechanism that moves and holds a cassette reel position or an adapter drive position, and a drive mechanism that mounts a cassette holder to a reel base unit.

Effect The present invention has the above-described configuration, and when the large or medium cassette is mounted with the frame member mounted in the cassette holder, the large and medium cassettes can be mounted in the normal positions, and if the frame member is removed, the cassette holder has the same size as the adapter. You can install a cassette adapter that stores a small cassette.

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 has 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. 3 is provided on the upper surface of the adapter body 13 so as to be openable and closable, and is locked by a claw 25. A small reel 26 is housed in the small cassette 12 and engages with the small cassette reel stands 17a and 17b. A frame member 28 is attached to the cassette holder 27 to which the adapter body 13 is attached as shown in FIGS. 5 and 6, and lock claws 29a and 29b provided on both sides are provided with cutout holes 30a and 30b in the holder 27. Is engaged and held. Further, the frame member detectors 31a and 31b such as microswitches provided on both sides of the holder 27 are the frame member 28.
Alternatively, when the adapter 13 is inserted, both of them operate and output a detection signal, but when the large cassette 10 or the middle cassette 11 is inserted, both sides cannot be operated because of the narrow width, and it is determined that the insertion is erroneous. The lock mechanism and the detector may be provided at the upper and lower positions. Also the first and fifth
The reel base units 32a and 32b shown in the figure are the screw spindle 3
5a, 35b and guide shafts 36a, 36b are slidably held, and bevel gears 33a, 33b provided at one end are connected to a motor 34 via 33c, and provided on the reel stand unit 32a. The reel stand detectors 38, 39 configured by a light receiving element to emit light from the projected piece 37.
When a, b, and 40 detect, the drive is stopped and the reel stand unit is moved to the large cassette reel position (32a, 32) shown in FIG.
b), the middle cassette reel positions (32a ', 32b') and the adapter position shown in FIG. When the reel base units 32a and 32b are arranged at the adapter position, the reel bases 41a and 41b engage 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 position from the medium cassette side to the adapter side. Further, the cassette holder 27 is provided with cassette detectors 42 and 43 (not shown in FIG. 6), and the type of the inserted cassette is judged by this detection signal to move the reel base units 32a and 32b. Further, the convex portion 28 'provided on the lower surface of the frame member 28 in FIG. 6 is for centering particularly when the middle cassette 11 is mounted, and slides with a groove (not shown) provided on the lower surface of the cassette. Contact. Further, the cassette holder 27 is provided with a micro switch 44 on the front surface, detects that the cassette or the adapter is completely inserted into the holder, and lowers the cassette holder 27 by a drive mechanism (not shown) to move the reel stand. 41a and 41b are engaged with the reel or reel base engaging members 21a and 21b. FIG. 7 is a flow chart showing the outline of the mechanical control system of the present apparatus. When the power of the apparatus is turned on, the condition A or B is set first. The condition A is the holder 27, the frame member 28, the adapter 13, The large and medium cassettes 10 and 11 are not mounted, condition B is the condition that only the frame member 28 is mounted, and condition A is adapter 1.
Since 3 can be installed, the reel stand unit 32 is automatically
a and 32b are arranged at the adapter driving position, and in the case of condition B, large and medium cassettes 10 and 11 can be mounted, so the reel stand units 32a and 32b are arranged at either position. The cassette initial setting changeover switch is used to set a cassette, which is frequently used, in advance, and is provided inside the device. The flow on condition A side can be conditions B and C, and in the case of B in which only the frame member 28 is mounted, it shifts to the cassette mounting side, and condition C is the case where the adapter 13 is inserted, so the cassette holder is as it is. 27 is attached to the reel base unit. The flow of the condition B is possible when the conditions D, C ′ and A are possible and moves to the adapter side in the case of A, and when the large cassette 10 or the middle cassette 11 is normally inserted in the case of D and C ′. Therefore, the reel stand is moved to a position corresponding to that, and the cassette holder 27 is mounted on the reel stand unit. Here, the difference between the conditions C ′ and C will be explained. 43 to 31a, 31
b and 44 in that order, C'is 31a, 31b through 4
The order is 2, 43 and 44.

The operation of the cassette mounting apparatus of this embodiment constructed as above will be described below. First, a large cassette 10
Alternatively, when mounting the middle cassette 11, when the frame member 28 is first mounted on the holder 27, the reel stands 41a, 4
When 1b moves to the initial setting position and a larger or medium cassette is inserted, the condition D or C'is satisfied and the drive mechanism of the cassette holder 27 mounts each reel on the reel stands 41a and 41b. Next, when the adapter is used, first the frame member 28 is removed from the holder 27, the reel stands 41a and 41b move to the adapter position and stand by, and the upper lid 24 of the adapter body 13 is opened and then the small cassette 12 is mounted. Then, when the cassette holder 27 is inserted into the closed holder 27, the condition C is satisfied, and the drive mechanism of the cassette holder 27 causes the reel bases 41a and 41b to move to the reel base engaging members 21a,
21b is attached. Further, when the frame member 28 is mounted, a larger adapter 13 cannot be inserted, and conversely, when the frame member 28 is removed, a cassette narrower than the frame can simultaneously operate the microswitches 31a and 31b. Therefore, the condition of FIG. 7 cannot be satisfied, and it is determined that the insertion is incorrect.

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 casing 13 which is slightly larger than the large cassette 10, and the cassette to which this adapter can be attached. By providing the holder 27, the small cassette 12 having the same thickness as the large cassette 10 can be mounted on the large cassette VTR by using an adapter. Also a large cassette 1
When the 0 and medium cassettes 11 are mounted, all the cassettes can be mounted on the same VTR by inserting the frame member 28 that fills the gap between the cassette holder 27 and the cassette holder 27 and then inserting the large and medium cassettes.

In this embodiment, the frame member 28 is configured so as to surround the entire circumference of the cassette, but the minimum required portion for driving the reels of the small cassette is only the lower surface, and it goes without saying that a member for filling only this portion may be used. is there. Also, in the cassette used in this embodiment, the adapter drive position is set outside the large cassette reel position, but in the case of a cassette with a larger dimensional difference between the large and small cassettes, the adapter is set at the large cassette reel drive position. It can be driven, and the configuration can be simplified.

As described above, according to the present invention, the small cassette 12 of a plurality of types of tape cassettes having the same thickness and different sizes is used with an adapter slightly larger than the large cassette 10, and the small cassette reel is used. Since the reel base can be mounted without approaching to the position, the small cassette 12 can be mounted on the large cassette VTR equipped with the large diameter reel motor.

When the frame member 28 is not attached to the cassette holder 27 when the power is turned on, the reel base units 32a and 32b are automatically moved to the adapter drive position, and when the frame members 28 are attached, the reel base units are automatically moved to the large cassette or the middle cassette reel position. By arranging so that the mounting time can be shortened, its practical effect is great.

[Brief description of drawings]

FIG. 1 is a plan view of a cassette mounting device according to 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. 4 is a reel drive in the adapter. FIG. 5 is a cross-sectional view showing the mechanism, FIG. 5 is a plan view showing a state where large and medium cassettes are mounted in the cassette mounting apparatus of the same embodiment, and FIG. 6 is a perspective view showing the configuration of the cassette holder and frame member of the same embodiment. FIG. 7 is a flow chart showing an outline of the mechanical control system of the same embodiment, FIG.
FIG. 9 is a plan view and a sectional view showing a conventional cassette adapter device, and FIGS. 10A and 10B are a plan view and a sectional view showing three types of cassettes of the same thickness which are mounted in this embodiment. 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 ... Frame members, 31a, b ... Frame member detectors, 32a, b ...
Reel stand unit, 38, 39a, b40 ... Reel stand position detector, 42, 43 ... Cassette detector.

Claims (2)

[Claims] 1. A holding member for holding a small cassette is provided in a casing slightly larger than a large cassette, and a transmission mechanism for indirectly engaging a reel stand of a main body and transmitting a driving force to a small cassette reel is provided. Cassette adapter, a cassette holder to which this adapter can be attached, a frame member that fills the gap between the cassette holder when a large cassette is attached, and detection that detects whether a large cassette, a medium cassette, or an adapter is inserted Means, a reel base moving mechanism for moving and holding the reel base of the main body to a large or medium cassette reel position or an adapter drive position based on this detection signal, and reciprocating the cassette holder from the cassette insertion position to the reel base unit position. A cassette holder drive mechanism is installed to remove the frame member when using large or medium cassettes. Insert the cassette mounted on preparative holder, cassette loading apparatus characterized by being configured to insert the adapter to remove the frame member at the time of using the adapter. 2. The reel base unit is automatically arranged at the adapter driving position when the frame member is not mounted on the cassette holder when the power is turned on, and at the large cassette or middle cassette position when the frame member is mounted. The cassette mounting device according to claim 1, characterized in that