JPH0442744B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing apparatus, and more particularly to a cassette erroneous insertion prevention device suitable for preventing erroneous insertion of a cassette half.

Conventionally, in order to prevent the cassette half 1 from being inserted in the wrong orientation, such as front to back or upside down, when the cassette half 1 is placed in the raised position of the cassette holder 2 for mounting the cassette half 1 in a magnetic recording/reproducing apparatus, the cassette half 1 shown in FIG.
Measures as shown in Figure 2 were taken.

According to FIG. 1, when the cassette half 1 is inserted in the wrong posture from the direction of arrow A, the cassette half 1 is pressed against the bottom surface 4 of the cassette holder 2 by the cassette presser spring 3, and is inserted. It comes into contact with the locking piece 5 installed to prevent incorrect insertion,
Insertion is blocked.

However, according to this method, if you forcefully insert the
The cassette half 1 resists the force of the cassette holding spring 3 and rides on the erroneous insertion prevention locking piece 5, resulting in erroneous insertion.

In FIG. 2, the incorrect insertion prevention wire 6 is formed into a substantially U-shape as shown in the figure, and is elastically engaged and installed in the cassette holder 2.

According to this system, even if the cassette half 1 rides on the incorrect insertion locking piece 5, the prevention wire 6 prevents the insertion.

However, in this system as well, when the cassette half 1 is forcibly pushed in, the prevention wire 6 rotates in the direction of the arrow B, resulting in incorrect insertion.

Therefore, a device that can reliably prevent erroneous insertion has been desired.

An object of the present invention is to provide a magnetic recording/reproducing device with:
To provide a cassette erroneous insertion prevention device that reliably prevents erroneous insertion of a cassette half into a cassette holder.

The cassette half inserted into the cassette holder is in contact with the bottom surface of the holder in the raised position of the holder, and rises above the bottom surface when the holder is lowered and the cassette is installed in a predetermined position.

The present invention focuses on the fact that the state of the cassette holder device is different between the raised position of the cassette holder and the lowered position where the cassette is attached to the device, and is capable of responding to the above-mentioned cassette movements and solving the conventional problems. It is.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 to 5.
explain.

FIG. 3 is a partially cutaway perspective view of the cassette holder device equipped with the cassette erroneous insertion prevention device of the present invention in the raised position of the cassette holder for attaching and detaching the cassette. Indicates a state where insertion is blocked.

Reference numeral 1 designates a cassette half for storing the magnetic tape 7, which is inserted upside down, with the back side facing up. 8 is the magnetic tape 7 in the cassette half 1
This is a lid that is rotatably provided on the half 1 to prevent dust and protect it from damage.

Reference numeral 5 denotes a locking piece for preventing incorrect insertion provided on the bottom surface 4 of the cassette holder 2. When the cassette half 1 is inserted from the direction of arrow A in an incorrect posture, it comes into contact with the half 1 and prevents the insertion. Cassette half 1
When the half 1 is inserted in the correct posture, the incorrect insertion prevention piece 5 is inserted into the notch 9 provided at the center of the lower end of the lid 8 to allow insertion, and the groove 10 on the back surface of the half 1 to allow insertion. It enters and is stored.

Reference numeral 3 denotes a cassette holding spring, which urges the cassette half 1 inserted into the holder 2 in the direction 4 of the bottom surface of the holder.

Reference numeral 11 denotes a cassette lid, which is fixed to the cassette holder 2 and covers the upper surface of the holder 2.

Reference numeral 12 denotes a link for raising and lowering the cassette holder 2, which is swingably supported by the holder 2, and by swinging with one end as a pivot, raises and lowers the holder 2 between the cassette attachment/detachment position and the attachment position, and partially A round hole 13 is provided in which the incorrect insertion prevention wire 16 of the present invention is engaged and attached.

Reference numeral 14 denotes a wire guide groove of the present invention installed on the side surface 15 of the cassette holder 2, and guides the prevention wire 16.

Reference numeral 16 denotes a wire rod for preventing incorrect insertion of the present invention, which is formed into a predetermined shape, crosses the cassette holder 2 at right angles to the insertion direction of the cassette half 1, and is inserted into the wire guide groove 14.
It is attached to the round hole 13 of the link 12 using elasticity.

Next, the operation of the cassette erroneous insertion prevention device of the present invention will be explained.

Figure 3 shows a state in which the cassette half 1 is inserted into the cassette holder 2 at the cassette attachment/detachment position from the direction of arrow A in an upside-down position, and the cassette half 1 resists the pressing force of the spring 3 to prevent incorrect insertion. Locking piece 5
However, as shown in FIG.
Since the thickness is kept smaller than the thickness of the cassette half 1, the insertion side front end surface of the cassette half 1 comes into contact with the erroneous insertion prevention wire 16, and the rotation of the erroneous insertion prevention wire 16 in the direction of arrow B is prevented by the wire guide groove 14. This prevents further insertion. FIG. 4 shows the cassette holder device in the raised position of the cassette holder 2.
FIG. 3 is a partially cutaway perspective view of the cassette half 1 correctly inserted. The cassette half 1 has a locking piece 5 for preventing incorrect insertion, a notch 9 for allowing the lid 8 to be inserted, and a groove 10 for allowing the half 1 to be inserted.
The wire rod 16 passes through and is housed in the wire guide groove 14, and passes through the lower part of the prevention wire 16 guided in the wire guide groove 14, and the insertion is completed.

Figure 5 shows cassette half 1 correctly inserted.
FIG. 2 is a partially cutaway perspective view of the cassette holder device having been lowered and completely installed in the cassette mounting position of the magnetic recording/reproducing device.

The cassette holder 2 is lowered from the cassette attachment/detachment position to the cassette attachment position as shown in FIG. 4 by the swinging of the elevating link 12.

According to this operation, the relative positional relationship between the cassette holder 2 and the lifting link 12 changes, and the incorrect insertion prevention wire 16 of the present invention attached to the link 12 moves into the fourth position.
When the holder 2 is guided in the direction of arrow C from the position in the wire guide groove 14 shown in the figure and reaches the cassette mounting position, it reaches the position shown in FIG.

In FIG. 5, the cassette half 1 rises above the bottom surface 4 of the cassette holder 2, but the prevention wire 16
is located further above the cassette half 1, so there is no problem.

As described above, according to the present invention, the incorrect insertion prevention wire 16
is attached to the elevating link 12, and by moving the cassette holder 2 between the cassette attachment/detachment position and the cassette attachment position, the relative positional relationship with respect to the cassette holder 2 is changed, and the operation of the cassette holder apparatus is not hindered. Moreover, since the prevention wire 16 is guided by the wire guide groove 14, even if the cassette half 1 is inserted in the wrong position and the half 1 comes into contact with the wire 16, the position of the wire 16 can be maintained and the wire rod 16 can be reliably inserted. Misinsertion of the cassette half 1 can be prevented.

In addition to the above configuration, holder 2 and link 12
A similar device can be obtained by installing a cassette erroneous insertion prevention member on the link 12 by utilizing the difference in relative position between the cassette removal position and the cassette attachment position.

To reliably prevent erroneous insertion when a cassette half is inserted into a cassette holder in an incorrect orientation.

The structure is simple and economical.

[Brief explanation of drawings]

1 and 2 are perspective views of a conventional cassette erroneous insertion prevention device, and FIG. 3 is a partial view of a cassette half being erroneously inserted into a cassette holder device equipped with the cassette erroneous insertion prevention device of the present invention. FIG. 4 is a partially cutaway perspective view of the cassette half correctly inserted into the cassette holder device which has been raised to the cassette removal position and is equipped with the cassette misinsertion prevention device of the present invention. FIG. FIG. 3 is a partially cutaway perspective view showing a state in which the cassette holter device equipped with the cassette misinsertion prevention device of the invention has housed a cassette half and has been lowered to the cassette device position. 1... Cassette half, 2... Cassette holder, 5... Erroneous insertion prevention locking piece, 8... Lid, 9...
Notch, 10... Groove, 12... Lifting link,
13...Round hole, 14...Wire guide groove, 15...Cassette holder side surface, 16...Wire rod to prevent incorrect insertion.

Claims (1)

[Scope of Claims] 1. A cassette holder that is reciprocated between a removal position where a tape cassette can be inserted/taken out and a mounting position where a tape cassette can be recorded/played out, and an operating member that operates the movement of the cassette holder. In the magnetic recording and reproducing apparatus, the tape cassette is pressed against the bottom surface of the cassette holder at the detaching position, and the tape cassette is lifted up by a predetermined amount from the bottom surface of the cassette holder at the mounting position, the bottom surface side of the cassette holder The tape cassette is inserted into the recess of the tape cassette only when the tape cassette is inserted in the correct orientation, allowing smooth insertion of the tape cassette into the cassette holder, and prevents the insertion of the tape cassette when the tape cassette is inserted in the wrong orientation. a convex portion that abuts the side front end surface; a convex portion that is bridged over the cassette holder perpendicular to the insertion direction of the tape cassette, has both ends rotatably supported by the operating member, and is formed on the side wall of the cassette holder; an erroneous insertion prevention member that is partially engaged with the guide groove, and when the cassette holder is in the above-described attachment/detachment position, the swinging of the erroneous insertion prevention member is restrained by the guide groove. The distance between the erroneous insertion prevention member and the protrusion is kept smaller than the thickness of the tape cassette, thereby preventing the tape cassette inserted in an incorrect orientation from climbing over the protrusion, and preventing the tape cassette from climbing over the protrusion. When the holder moves to the mounting position described above, the relative displacement between the operating member and the cassette holder causes the erroneous insertion prevention member to swing along the guide groove, thereby causing the erroneous insertion prevention member to swing. A device for preventing erroneous insertion of a cassette, characterized in that the cassette is retracted to a position above the tape cassette that is lifted up by a predetermined amount from the bottom surface of the cassette holder.