JPH087914B2 - Cassette mounting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a cassette mounting device that reciprocates a cassette holder that holds and conveys a cassette that stores a tape-shaped recording medium between a cassette insertion position and a loading completion position. It is about.

[Prior Art] In an apparatus that pulls out a magnetic tape stored in a cassette such as a VTR and records / reproduces a signal on / from the pulled-out tape, the cassette is attached / detached to / from the apparatus body and recording / reproduction is performed It is common to move to and from the fully loaded position for loading. This movement is done by moving the cassette holder that holds the cassette, but the position of the cassette within the cassette holder must be precisely defined so that the cassette is guided to a predetermined position in the device.
Therefore, a cassette pressing mechanism that presses the cassette in the cassette holder has been conventionally used.

On the other hand, this type of cassette is provided with a lid for protecting the magnetic tape. FIG. 2 is a view showing this type of cassette, in which 1 is a cassette main body, 1a is a lid, and 1b is a fulcrum for rotatably holding the lid 1a with respect to the cassette body. While the cassette holder is moving from the cassette attachment / detachment position to the cassette loading completion position, a pin (not shown) contacts the lid 1a to rotate the lid in the direction indicated by a in the figure. Along with this, a force in the direction indicated by "b" acts on the cassette in the cassette holder, which may change the position of the cassette in the cassette holder.

On the other hand, the above-mentioned cassette pressing mechanism is usually attached to the side plate of the cassette holder and presses points A and B in FIG. The pressing force of this pressing mechanism cannot be made too large considering the smoothness of cassette attachment / detachment. On the other hand, since the force for opening the lid as described above is considerably large, the pressing force for opening the lid is not sufficient, and an auxiliary pressing mechanism for pressing the point in FIG. 2C when the cassette is moved must be provided. Is desirable.

By the way, in recent VTRs, a type of so-called front loading is generally used, which detects that a user has inserted a cassette into the cassette insertion port and automatically moves the cassette to a loading completion position. In a VTR that performs such front loading, it is difficult to distinguish from the appearance whether or not a cassette is loaded. Therefore, when a cassette is loaded, it is necessary to prevent the insertion of another cassette (duplication insertion). I won't.

FIGS. 3 (a) and 3 (b) are views for explaining a conventional double insertion preventing mechanism, in which 1 is a cassette, 2 is a cassette insertion port, 3 is a cassette holder, and 7 is a double insertion preventing lever. , 8 are springs.

As shown in FIG. 3 (a), before inserting the cassette 1 into the insertion slot 2 and attaching it to the cassette holder 3, a duplicate insertion prevention lever 7 (having a fulcrum D) is provided below the insertion slot 2.
Is positioned and is in a standby state in which force is stored by the spring 8 so as to rotate in the direction of arrow E in the figure. Next, after the cassette 1 is mounted on the cassette holder 3, the cassette holder 3 that was positioned as a stopper for the rotation of the duplicate insertion preventing lever 7 moves as shown in the figure, so that the lever 7 rotates and as shown in FIG. Stop at the indicated position. Then, if the second cassette is mistakenly inserted, the duplicated insertion preventing lever 7 blocks the inside of the insertion slot 2 and the second cassette cannot be inserted.

[Problems to be Solved by the Invention] By the way, the above-mentioned duplicate insertion preventing mechanism must be provided in the vicinity of the cassette insertion port 2, but the above-mentioned auxiliary cassette pressing mechanism is also shown in FIG. 3 (b). Since the portion indicated by C is pressed as the cassette descends, it must be arranged in the same position. However, when the two mechanisms are arranged at the same position as the cassette is downsized, there is little space, and an extremely precise mechanism is required to realize these two functions. .

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cassette mounting device capable of stabilizing the position of the cassette and preventing duplicate insertion with an extremely simple structure.

[Means for Solving Problems] A cassette mounting apparatus according to the present invention reciprocates a cassette holder that holds and conveys a cassette that stores a tape-shaped recording medium between a cassette insertion position and a loading completion position. In the mounting device, while the cassette holder is moving to the mounting completion position, a member that presses the surface of the cassette on the side opposite to the mounting surface on the cassette holder does not allow another cassette to be inserted after the cassette is completely loaded. It is prohibited.

[Operation] With the above-described configuration, the same member can prevent duplicate insertion of the cassette and accurately define the position of the cassette. Therefore, the mechanism can be arranged with a sufficient space.

[Example] An example of the present invention will be described below.

FIG. 4 is a diagram showing a cassette holder of a cassette mounting apparatus as one embodiment of the present invention, and FIG. 5 is a diagram showing a drive mechanism of the cassette holder shown in FIG. In the figure, 4 is a turning lever which will be described in detail later, 10 is a holder main body, 11 is a bending portion on the cassette insertion side, 12a and 12b are stoppers for locking the end of the cassette, and 13a and 13b are holder main body 10. One-piece side wall, 14
Reference numerals a, 14b, 15a and 15b are drive shafts driven by a cassette drive mechanism.

In FIG. 5, reference numeral 21 is a drive mechanism main body, and 22a and 22b are guide grooves formed on the side plates 23 of the main body 21, respectively, into which the drive shafts 14a and 15a are fitted. Note that guide grooves 22c and 22d are similarly formed on the side plate 24 opposite to the side plate 23. Reference numeral 25 denotes a motor, and the rotation of the motor 25 is transmitted to the rotary plate 28 via the idlers 26 and 27. Reference numeral 29 denotes a connecting rod that connects the outer diameter portion of the rotating plate and the drive shaft 14a. When the rotating plate 28 rotates counterclockwise, the drive shaft 14a moves in the direction of arrow 30 in the figure via the connecting rod 29. Also, each shaft 14a, 15a, 14b,
15b moves along the guide grooves 22a, 22b, 22c, 22d, respectively. 31
Is a window for covering the cassette insertion slot 3,
It is rotatably supported by both side plates 23 and 24. The cassette is inserted by the user through the window 31 and brought into contact with the stopper 12a of the holder body. Then, when the cassette is further pushed in the insertion direction, a switch (not shown) is turned on to drive the motor 25 and guide the drive shaft 14a in the direction of arrow 30 along the guide groove 22a.
Moves in the insertion direction and then moves downward to complete the loading of the cassette. FIG. 1 is a side view showing a main part of a cassette mounting apparatus according to an embodiment of the present invention, in which reference numeral 4 denotes the above-mentioned rotary lever, which is rotatable around a shaft 40 supported by a drive mechanism main body 21. is there. Reference numeral 5 is a spring, 6 is a back plate integrally formed with the drive mechanism main body 21, and 9 is a second cassette.

FIG. 1 (a) is a state before the cassette is mounted, FIG. 1 (b)
Indicates the state of loading the cassette. First, in FIG. 1 (a), the lever 4 is biased in the counterclockwise direction in the figure by the spring 5, and is in a state of storing the rotational force. At this time, the leg portion 4a of the lever 4 is locked by the cassette holder 3 and the back plate 6
And the boss 4b of the lever 4 receives the force of the spring 5. Then, when the cassette 1 is inserted into the cassette holder 3 and moved horizontally and then descends, the state changes to the state of FIG. 1 (b), and at this time, the lever 4 for preventing double insertion is placed in the cassette holder 3. As it moves, the legs 4a of the lever 4 press the rear part of the cassette 1 as shown in FIG. 1 (b) (giving a pressing force to part C in FIG. 2), and the second If you accidentally insert the
The rear surface 4C of the device comes into contact with the cassette 9 to be inserted so that the cassette 9 cannot be inserted.

[Effects of the Invention] As described above, according to the cassette mounting apparatus of the present invention, the cassette mounting device is provided with a member having both the pressing function of the cassette rear portion for stabilizing the position of the cassette and the cassette duplicate insertion preventing function, One member can have two functions, and the device can be simplified and the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the outline of the main part of a cassette mounting apparatus showing an embodiment of the present invention, FIG. 2 is a view showing a cassette, and FIG. 3 is a duplicate insertion preventing mechanism in a conventional cassette mounting apparatus. FIG. 4 is a view showing the cassette holder according to the embodiment of FIG. 1, and FIG. 5 is a view showing a driving mechanism of the cassette holder shown in FIG. In the figure. 1: Cassette, 2: Cassette insertion slot 4: Rotating lever, 5: Spring 6: Back plate, 10: Cassette holder

Claims (1)

[Claims] 1. A cassette mounting device that reciprocates a cassette holder that holds and conveys a cassette that stores a tape-shaped recording medium between a cassette insertion position and a loading completion position, wherein the cassette holder moves to the mounting completion position. A cassette mounting device, wherein a member for pressing a surface of the cassette opposite to a mounting surface of the cassette on the cassette holder prohibits insertion of another cassette after completion of loading the cassette.