JPH0792966B2 - Tape cassette loading device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette loading device in a video tape recorder, an audio tape recorder, or the like, which can prevent the insertion of the tape cassette which is inserted upside down. Moreover, the loaded tape cassette can be moved in a direction perpendicular to the insertion direction.

2. Description of the Related Art FIG. 2 shows the structure of a conventional tape cassette loading device. In FIG. 2, reference numeral 1 is a cassette housing, into which the tape cassette 2 is inserted along the sliding surface 1a in the direction of the arrow. FIG. 2 shows the tape cassette 2 inserted upside down. Reference numeral 3 denotes a stopper which is provided so as to project from the sliding surface 1a of the cassette housing base and which regulates the insertion position of the cassette. Reference numeral 4 denotes a step portion which is cut out at the front edge portion of the bottom surface of the tape cassette 2. When the tape cassette 2 is normally inserted, the stopper 3 engages with the cassette step portion 4 to regulate the insertion position of the tape cassette. Further, when the tape cassette 2 is inserted by reversing the vertical direction, the front edge portion 2a of the upper surface of the tape cassette contacts the stopper 3 to prevent the insertion.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, when the tape cassette 2 is reversed and strongly inserted, it may be inserted over the stopper 3 as shown in FIG. Or it could damage the device.

Means for Solving the Problems In order to solve the above problems, the cassette tape loading device of the present invention is provided with a step portion formed at the front edge of the cassette to be inserted, on the sliding surface of the cassette storage base. In addition, a stopper for restricting the insertion position is provided, and at a position substantially facing the stopper, the distance is slightly larger than the sliding surface due to the thickness of the cassette, and the stopper does not move in the cassette sliding direction. , Is provided with an insertion preventing lever that moves in a direction perpendicular to the sliding direction.

Action According to the above-mentioned configuration, when the tape cassette is inserted in the reverse direction, the step portion of the tape cassette inserted in the reverse direction and the blocking lever are engaged even if the tape cassette is inserted beyond the stopper. Further insertion of the tape cassette can be completely prevented, and damage to the tape cassette and the device can be prevented. When the cassette is loaded normally, the bottom of the tape cassette is slightly raised above the sliding surface of the storage base when the cassette storage base is lowered and the tape cassette is engaged with the reel base. There is no problem because the blocking lever is also configured to be able to rise.

Embodiment FIG. 1 shows an embodiment of the present invention. The difference from the conventional configuration shown in FIG. 2 is that the insertion blocking lever 5 can be rotated by an engaging pin 6 on the upper part of the cassette storage base 1. Support,
Normally, the tip action portion 9 of the blocking lever 5 is provided on the insertion lever 5 by the tension spring 8 so as to be positioned above the sliding surface 1a by a distance L ₄ slightly separated from the thickness L ₂ of the tape cassette 1. The contact point 7 is at the point of contact with the storage base 1. That is, the insertion preventing lever 5 cannot move in the cassette inserting direction, but can move in a direction perpendicular to the sliding surface 1a. In the above structure, as shown in FIG.
As the distance L ₃ from the tip of the stopper 3 to the tip of the insertion blocking lever 5 is larger than the distance L ₁ from the upper surface of the cassette 2 to the step 4 and smaller than the thickness L _{2 of} the cassette, The action point 9 of the insertion blocking lever is engaged with the front edge step portion 4 and is set to prevent further insertion of the cassette. The insertion preventing lever 5 is configured to be movable in the direction perpendicular to the sliding surface 1a.
When the tape cassette is inserted to a predetermined position on the cassette storage table during normal cassette loading and then the cassette storage table 1 is lowered to engage the tape cassette 2 with the reel table (not shown), the tape cassette The bottom surface of the tape cassette comes into contact with a position regulating pin provided on the device substrate to regulate its position. In this regulated state, the bottom surface of the tape cassette should be positioned slightly above the sliding surface 1a of the storage base 1. It is a common configuration.

That is, the tape cassette needs to be able to move slightly up and down in the tape storage table.

As described above, the present invention can prevent the reverse insertion of the tape cassette by providing the reverse insertion preventing lever in the tape cassette loading device such as the video tape recorder or the audio tape recorder. .

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a cassette tape loading device according to an embodiment of the present invention, and FIG. 2 is a sectional view of an essential part of a conventional cassette tape loading device. 1 ... Cassette storage stand, 2 ... Tape cassette, 3 ...
Cassette storage table stopper, 4 ... Tape cassette bottom front edge step, 5 ... Insertion blocking lever, 9 ... Insertion blocking lever acting part.

Claims (1)

[Claims] 1. A cassette storage base 1 having a sliding surface into which a tape cassette 2 having a step portion 4 cut out at a front edge portion of a bottom surface is slidably inserted, and a step of the step portion from the sliding surface. A stopper 3 that is provided so as to project at a height smaller than the height and that engages with the stepped portion of the tape cassette that has been inserted to a predetermined position to regulate the insertion position, and that faces the sliding surface. An insert which is provided at a distance slightly larger than the thickness of the tape cassette, and which engages with the step and prevents the insertion when the upper surface of the tape cassette inserted in the reverse direction is positioned on the stopper. A tape cassette loading device, comprising: a blocking lever, wherein the insertion blocking lever is supported immovably in the insertion direction and movable in a direction perpendicular to the sliding surface.