JPH0743860B2 - Tape cassette loading device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a magnetic tape housed in a housing along a tape pull-out opening provided on the front surface of a cassette housing, and the front surface of the opening. The present invention relates to a cassette loading device to which a tape cassette having a rotatable opening / closing lid that covers is mounted.

2. Description of the Related Art Conventionally, as a cassette having an opening / closing lid, the one shown in FIG. 2 has been used, and the structure shown in FIG. 3 has been used as a device for opening the opening / closing lid by utilizing the mounting operation to the cassette loading device. It's being used.

In FIG. 2, reference numeral 1 denotes a rectangular parallelepiped cassette housing having a supply reel and a take-up reel built therein, and a tape pull-out opening 2 is provided on the front side surface thereof. The tape 3 is supported by the guide pins 4a, 4b, 4c so as to be positioned along the opening 2. Reference numeral 5 denotes an opening / closing lid having a rotation fulcrum 6 near the upper end of the opening 2, and covers the magnetic tape 3 exposed from the opening 2 when not in use. Reference numeral 7 is a step formed on the front edge of the bottom surface of the housing 1.

FIG. 3 shows a cassette storage table of the cassette loading device. The tape cassette is inserted along the sliding surface 8 in the direction of arrow A. Reference numeral 9 denotes a side plate extending perpendicularly to the sliding surface 8, on which the guide pin 10 and the shaft 16 are attached.
Using as a guide, a detecting member 11 is provided so as to be slidable in the direction of the arrow A. The detection member 11 is provided with an engagement piece 12 extending in the vicinity of the sliding surface 8. In addition,
Reference numerals 10a and 16a are elongated holes provided in the detection member 11 so as to engage with the guide pin 10 and the shaft 16, respectively. Reference numeral 13 denotes a lid opening member whose middle portion is rotatably supported by the side plate 9 by the shaft 16, and a long hole 15 formed at one end of the lid opening member is slidable with a pin 14 planted in the detection member 11. , And the other end is bent in a hook shape, and its tip 13a is arranged to be substantially flush with the sliding surface 8 as shown in FIG. Reference numeral 17 is a spring that elastically biases the detection member 11 in the direction opposite to the arrow A direction.

Next, this operation will be described. As shown in FIG. 4, when the cassette 1 is inserted into the cassette housing with the lid 5 closed, the step portion 7 formed at the front edge of the bottom surface of the cassette 1
Contacts the engaging piece 12 and moves the detecting member 11 in the direction of arrow A against the force of the spring 17. Along with this movement, the lid opening member 13 rotates counterclockwise about the shaft 16, and with this rotation, the lid 5 is opened as shown in FIG. In this open state, the cassette storage table is lowered to the operating position to engage the reels in the tape cassette with the reel table provided below the cassette storage table.

Problems to be Solved by the Invention However, in the above configuration, when the tape 5 is lifted from the sliding surface 8 due to external vibration when the lid 5 is opened as shown in FIG. ,
The engagement between the engagement piece 12 and the step portion 7 is released, the detection member 11 is moved in the direction opposite to the arrow A direction by the elastic force of the spring 17, and the tape cassette lifted approaches the sliding surface 8 again. In that case, the engagement piece 12 and the bottom surface of the tape cassette come into contact with each other, and there is a problem that the tape cassette does not return to the normal position again. To solve this problem,
It suffices if the gap between the sliding surface 8 of the cassette storage table and the upper plate 8a facing the sliding surface 8 is sufficiently narrow. In such a configuration, the cassette storage table is lowered to the operating position. Therefore, when the reels in the cassette are engaged with the reel base, there is a problem that the reel and the reel base are not completely engaged.

Means for Solving the Problems In order to solve the above problems, the cassette loading device of the present invention engages with the cassette insertion detecting means when the cassette storage table is in the operating position, and the cassette insertion detecting means is engaged. It constitutes a blocking means for blocking the movement in the direction opposite to the arrow A.

Operation According to the above configuration, even if the front end portion of the tape cassette with the opening / closing lid opened at the operating position floats above the sliding surface, the cassette insertion detection means is prevented from returning by the blocking means. Therefore, unlike the conventional case, the cassette insertion detecting means does not move in the returning direction and the tape cassette does not return to the normal state.

Practical Example FIG. 1 is a perspective view showing a main part of an embodiment of a cassette loading apparatus of the present invention, and the same reference numerals are given to the same mechanical parts as those of the conventional configuration.

That is, the point that is particularly different from the conventional configuration is that the lower end of the detection member 11 is provided with an engaging protrusion 21 having an inclined surface 20 at the tip, and when the cassette storage table is lowered to the operating position, the engagement is performed. The point is that a pin 22 is provided on the chassis body side that engages with the inclined surface 20 of the protrusion 21 and prevents the detection member 11 from returning to the side opposite to the arrow A direction by the force of the spring 17.

According to the above construction, when the cassette storage table is lowered to the operating position, the engagement projection 21 and the pin 22 are engaged as shown by the dotted line in FIG. 1, so that the tip of the cassette 2 slides. Surface 8
Even if the engaging piece 12 is slightly lifted and the engagement between the engaging piece 12 and the step portion 7 is disengaged, the detecting member 11 does not return in the direction opposite to the arrow A direction.
Therefore, if the floating tape cassette is lowered, the original normal state is restored.

EFFECTS OF THE INVENTION As described above, according to the cassette loading device of the present invention, the engaging protrusion is provided integrally with the detection member, and the engaging pin is provided on the substrate chassis side, so that the cassette can be lifted up. The problems involved can be eliminated, and stable recording / reproducing operations can be expected.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing an embodiment of a tape loading device of the present invention, FIG. 2 is a perspective view showing an example of a tape cassette used in the present invention, and FIG. 3 is a conventional cassette loading device. FIG. 4 is a perspective view, FIG. 4 and FIG. 5 are a side view and a sectional view in different states. 1 ... Cassette housing, 2 ... Tape drawing opening, 3 ...
… Magnetic tapes, 4a, 4b, 4c …… Guide pins in cassette, 5
...... Open / close lid, 6 ... Rotation fulcrum, 7 ... Step, 8 ... Sliding surface, 9 ... Side plate, 10 ... Guide pin, 11 ... Detecting member,
12 ... Engaging piece, 13 ... Lid opening member, 14 ... Shaft, 15 ... Oblong hole, 16 ... Rotating shaft, 17 ... Spring, 19 ... Detection member oblong hole,
20 ...... Engagement protrusion inclined surface, 21 ...... Engagement protrusion, 22 ...... Pin.

Claims (1)

[Claims] 1. A cassette housing having a sliding surface into which a tape cassette is slidably inserted, and an engaging portion formed on a lower surface of the cassette inserted into the cassette housing, A cassette insertion detecting means that reversibly moves from the first position to the second position together with the cassette, and a lid of the cassette when the cassette insertion detecting means moves from the first position to the second position. And a means for moving the cassette storage base to an operation position where a reel base provided under the cassette storage base and a reel in the cassette located at the second position engage with each other. A tape cassette comprising blocking means that engages with the cassette insertion detecting means when the cassette storage base is in the operating position to prevent movement of the cassette insertion detecting means to the first position. Door loading device.