JPH0421964A - Cassette loading device - Google Patents

Abstract

PURPOSE:To prevent a foreign material from being put into a magnetic recording and reproducing device by locking the lid of a front loading mechanism by an optical sensor so as not to be opened except for a regular cassette. CONSTITUTION:When a regular cassette 10 is inserted to a cassette port 1, infrared rays emitted from a light emitting element 3 of the optical sensor are shielded by the regular cassette 10, and no infrared rays are received by a light receiving element 2 of the optical sensor. Then, the output levels of amplifiers 23 and 24 to amplifier the outputs of right and left sensors 22 and 21 are enlarged together and this is detected by the detector 25, consequently it is judged that the regular cassette 10 is inserted. A planger 7 is pulled off by a driver 26 to release a lock lever 6, and a lid 4 can be moved in the direction of an arrow B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cassette loading device that controls opening and closing of a lid of a front loading mechanism in a recording/reproducing device.

[Prior Art] FIG. 9 is a side view of a conventional cassette loading device, in which the first
FIG. 0 is a plan view of the apparatus of FIG. 9.

In FIGS. 9 and 10, 10 is a cassette.

11 is a cassette insertion slot, 14 is a front loading mechanism i, 15 is a cassette holder, 18 is a rotation fulcrum of the lid 14, and 19 is a spring.

In the conventional recording and reproducing apparatus, the cassette 10 is inserted into the cassette holder 1 through the lid 14 of the front loading mechanism.
In particular, when the lid 14 of the front loading mechanism is not installed in the cassette 10 or the recording/reproducing device, the lid 14 described above can be opened and closed freely.

[Problems to be Solved by the Invention] However, in the conventional example as described above, it is not only possible to insert a regular cassette, but also to insert a smaller cassette, such as a β type cassette, an 8 mm cassette, or a cassette other than a magnetic recording/reproducing cassette. The drawback was that foreign objects could easily get into the cassette holder of the front loading mechanism, that is, the magnetic recording/reproducing device. Furthermore, if a cassette or the like smaller than the regular cassette holder is inserted, it may fall into the internal mechanism of the cassette holder, resulting in a malfunction of the magnetic recording/reproducing device.

The present invention has been made to solve these problems, and provides a cassette mounting device that is low cost and has a small number of parts, and can prevent different types of cassettes and foreign objects from entering the recording/reproducing device. The purpose is to provide.

[Means for Solving the Problems] In order to achieve the above object, the cassette loading device of the present invention is provided with at least two optical sensors in the cassette insertion section of the front loading mechanism, and uses the optical sensors to detect the inserted material. The size of the front loading mechanism is detected and the opening and closing of the lid of the front loading mechanism is controlled.

[Function] With the above configuration, a means is provided in the cassette insertion slot to determine whether the cassette to be inserted is a regular cassette and to unlock the lid of the front loading mechanism. Even if a cassette smaller than the regular cassette or a foreign object is attempted to be inserted, the lid of the front loading mechanism is not unlocked, so that cassettes other than the regular cassette are prevented from entering the recording/reproducing device.

[Embodiment] FIGS. 1 to 5, 6, and 7 are views showing an embodiment of the present invention, and FIG. 1 is a side view showing an embodiment of the present invention. The figure is a plan view of the device in Figure 2, especially the first
The figures and FIG. 6 best represent the features of the invention.

1 and 6, 1 is a cassette insertion slot into which a cassette is inserted, 2 is a light-receiving element of an optical sensor for determining whether or not the cassette is a regular cassette, 3 is a light-emitting element of the optical sensor, and 4 is a front panel. 5 is a cassette holder for loading the cassette into the device; 6 is a lock lever 97 for preventing the lid 4 from being opened; 9 is a plunger for moving the lock lever 6; Spring for biasing in the six directions of arrows, 8 is the rotation fulcrum of the lid 4, 1
0 is a regular cassette. Further, 12 is a return spring for returning the plunger 7 and the lock lever 6.

The operation of the embodiment shown in FIGS. 1 and 6 will be described below with reference to FIGS. 2 to 5 and 11.

FIG. 11 is a block diagram showing the circuit structure of the apparatus of FIGS. 1 and 6.

As shown in FIG. 2, when a regular cassette 10 is inserted into the cassette insertion slot 1, the regular cassette 10 blocks the infrared light emitted from the light emitting element 3 of the optical sensor, as shown in FIG. , the infrared light is no longer received by the light-receiving element 2 of the optical sensor, and as shown in FIG. Detector 25 detects the genuine cassette 1
It is determined that 0 has been inserted. Then, the plunger 7 is pulled by the driver 26 and the lock lever 6 is released.
The lid 4 is now movable in the direction of arrow B in FIG.

It is assumed that the detector 25 outputs only when the outputs of both the left and right sensors 21 and 22 become O (when a regular cassette is inserted).

FIG. 4 shows the cassette inserted halfway, and the cassette 10 is inserted into the cassette holder 5, and the cassette 10 is mounted by the cassette holder 5 as shown in FIG. At this time, the plunger 7 is returned by a switch (not shown), thereby locking the opening and closing of the lid 4. This makes it impossible to insert another cassette or insert a foreign object even though the cassette 10 is installed.

Further, FIG. 6 shows a state in which the light emitting elements 3 are arranged on both sides of the cassette insertion opening l. Now, if the regular cassette lO is inserted correctly in the direction of the arrow,
As shown in FIG. 3, infrared light from the optical sensor is blocked and the cassette 10 can be inserted inside. Also, Figure 7 is a diagram when trying to insert the 8Il111 cassette.
As is clear from the comparison with FIG. 6, the light emitting element 3. The lid 4 does not block the infrared light from the optical sensor consisting of the light receiving element 2.
The lock lever 6 is locked and cannot be opened, so the 8nu
Cassette a cannot be inserted.

Furthermore, even if the proper cassettes 1 to 10 are used as shown in FIG. 8, if the insertion method is incorrect, the infrared light from the optical sensor will not be blocked and the C cassette 10 will not be inserted.

[Effects of the Invention] As explained above, the present invention uses optical sensors arranged on both sides of the cassette insertion [1] to detect the lid of the front loading mechanism only when a cassette other than a regular cassette is inserted. If the cassette is locked so that it cannot be opened, a different type of cassette may become inserted and cannot be removed, the lid may be closed and cannot be inserted except by the proper insertion method, and foreign objects other than the cassette may be inserted. Preventing the magnetic recording device from being inserted into the magnetic recording/reproducing device can be done with a small number of parts, and the cost can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
FIG. 3 is a side view showing a state in which a regular cassette is being inserted into the apparatus shown in the figure, and FIG. 3 is a side view showing a state in which the cassette 1- is blocking the optical sensor. Fig. 4 is a side view showing a state in which the cassette has been inserted after it has been determined by the optical sensor that it is a legitimate cassette, and Fig. 5 is a side view showing the state in which the cassette has been inserted into the device according to the present invention and the lid of the front loading mechanism is locked again. A side view showing the state in which
FIG. 6 is a plan view of FIG. 2, FIG. 7 is a plan view showing a state in which an 8o+m cassette is being inserted, and FIG. 8 is a plan view showing a state in which a regular cassette is not inserted in the correct way.
FIG. 9 is a side view of a conventional cassette loading device, FIG. 10 is a plan view of the device shown in FIG. 9, and FIG. 11 is a block diagram showing the circuit structure of the devices shown in FIGS. 1 and 6. In the figure: 1: Cassette insertion slot 2: Light receiving element 3: Light emitting element 4: Lid 5: Cassette holder 6: Locker 7: Plunger double rotation fulcrum: Wing: Regular cassette + 8mm cassette: Repeated wing

Claims (1)

[Claims] In a cassette loading device having a front loading mechanism, at least two optical sensors are provided in the cassette insertion part of the front loading mechanism, and the optical sensors detect the size of the inserted object and open/close the lid of the front loading mechanism. A cassette loading device characterized by control.