JPH0731397Y2 - Tape cassette loading device - Google Patents

Description

TECHNICAL FIELD 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. In addition, the loaded tape cassette can be moved in a direction perpendicular to the insertion direction.

2. Description of the Related Art Conventionally, a cassette having a stepped portion shown in FIG. 3 is shown in FIG. 4 as a device for preventing the cassette from being inserted upside down by utilizing the inserting operation into the cassette loading device. The configuration is used.

FIG. 3 shows a rectangular parallelepiped tape cassette 2 having a supply reel and a take-up reel incorporated therein, and an opening 2c for pulling out the tape is provided on the front side surface thereof. Are supported by guide pins 8a, 8b, 8c and the like so as to be positioned along the opening 2c. Reference numeral 2a denotes an opening / closing lid having a rotation fulcrum 2b near the upper end of the opening 2c, and the magnetic tape 9 exposed from the opening 2c when not in use.
To form a front edge portion of the tape cassette 2. Reference numeral 4 is a step formed on the front edge of the bottom surface 2d of the tape cassette 2.

In FIG. 4, reference numeral 1 is a cassette storage table, and a sliding surface 1a
The tape cassette 2 is inserted along the direction of arrow A in FIG. 4, and FIG. 4 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 storage table and which regulates an insertion position of the tape cassette 2, and 4 denotes a step portion which is cut out at a 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 2 contacts the stopper 3 to prevent the insertion. 10 is located above the sliding surface 1a and is fixed 10a
Is fixed to the cassette storage base 1, and an inclined main body portion 10b extending from the fixing portion 10a toward the inserting direction of the tape cassette 2 and the sliding surface 1a is formed. The tip portion 10c facing the sliding surface 1a is a pressing lever made of an elastic body located at a position where it can come into contact with the upper surface side of the tape cassette 2, and the inserted tape cassette 2 is the tip portion 10c of the pressing lever 10. Abutting against the pressing lever 1
When 0 is elastically deformed, the tape cassette 2 is slid along the sliding surface 1a by the urging force of the pressing lever 10. Further, when the tape cassette 2 is moved in the vertical direction by the elevator mechanism 6 composed of a plurality of conventionally known rotary arms 6a and is fixed in the operating position on the base 7, the tape cassette 2 is fixed to the base 7. It is configured to give a pressing force for doing.

However, in the above structure, when the tape cassette 2 is inserted upside down in the vertical direction and is strongly inserted, it may be inserted over the stopper 3 as shown in FIG.
There was a problem of damaging the tape cassette or the device.

Means for Solving the Problems In order to solve the above problems, a tape cassette loading device of the present invention has a sliding surface into which a tape cassette having a stepped portion at a front edge of a bottom surface is slidably inserted. A cassette storage table having the same, and an insertion preventing lever made of an elastic body having a locking portion bent toward the sliding surface at a tip portion and a projecting portion projecting toward the sliding surface at a central portion. The insertion preventing lever has a protruding portion located at a distance smaller than a thickness of the tape cassette and larger than a thickness of a step portion of the tape cassette with respect to the sliding surface, and a tip of the locking portion. Is fixed at the other end so as to be positioned at a distance smaller than the thickness of the stepped portion of the tape cassette, and is arranged at an angle, and the position of the locking portion and the protruding portion is Tape of the protruding part when it is inserted normally The insertion preventing lever is elastically deformed by the contact with the upper surface of the cassette, and the tip of the locking portion is set to move to a position larger than the thickness of the tape cassette with respect to the sliding surface.

Operation According to the above-mentioned configuration, when the tape cassette is inserted in the reverse direction, the front edge portion of the tape cassette and the locking portion of the blocking lever are engaged with each other, and further insertion of the tape cassette can be completely prevented. It is possible to prevent damage to the cassette and the device. Also, when the cassette storage table is lowered downward when the cassette is normally loaded and the tape cassette is engaged with the reel table, the bottom surface of the tape cassette is slightly raised above the sliding surface of the storage table. Since the blocking lever is an elastic body having a shape that is elastically deformed in the direction perpendicular to the sliding surface and is configured to fix the tape cassette downward to the substrate with a prescribed force, there is no problem. .

Embodiment FIG. 1 and FIG. 2 show an embodiment of the present invention. FIG. 1 is a sectional view of an essential part showing a state in which a tape cassette 2 is inserted upside down, and FIG. 2 is a tape cassette. It is a principal part sectional view which shows the state which inserted 2 normally. 4 is different from the conventional structure shown in FIG. 4 in that the cantilever-shaped insertion preventing lever 5 having the same basic structure is provided in place of the pressing lever shown in FIG. It is formed so as to face the sliding surface 1a of the storage base 1 and to project downward at a distance L3 which is slightly larger than the thickness L1 of the step portion 4 of the tape cassette 2 and slightly smaller than the thickness L2 of the tape cassette. This is a point in which a semicircular central protrusion 12 is located. With the above configuration, the cassette 2 inserted in the reverse direction as shown in FIG. ₁ has the tape cassette 2 at the engaging portion 11 of the insertion preventing lever 5 located at a distance L ₄ slightly smaller than the thickness L ₁ of the step portion 4. The front edge 2a of the tape cassette 2 is engaged with the tape cassette 2 to prevent the tape cassette 2 from being inserted further.

On the other hand, the insertion preventing lever 5 is extended from the fixing portion 5a fixed to the cassette housing base 1 in the inserting direction of the tape cassette 2 and toward the sliding surface 1a. That is,
Since it is an elastic body that is inclined rearward and downward, the fixing portion 5a
The locking portion 11 side is rotatable about the rotation center in the direction perpendicular to the sliding surface 1a. Therefore, when the tape cassette 2 is normally inserted, the insertion blocking lever 5 is moved to a position where the central protrusion 12 abuts on the tape cassette upper surface 2d, thereby pushing the tape cassette 2 against the sliding surface 1a. The moving distance L ₅ from the sliding surface 1a of the engaging portion 11 which is attached and is rotated upward by the abutment is equal to the fixed portion of the insertion blocking lever 5.
It is larger than the movement amount of the central protruding portion 12 by the ratio of the distance L ₆ from the rotating side end portion of 5a to the central protruding portion 12 and the distance L ₇ from the rotating side end portion of the fixed portion 5a to the engaging portion 11. It is set so as not to hinder the insertion of the tape cassette 2 by moving from the sliding surface 1a to a distance slightly larger than the tape cassette thickness L ₂ by utilizing the fact that it has a moving amount. The insertion preventing lever 5 is an elastic body that can move in a direction perpendicular to the sliding surface 1a and is configured to generate a pressing force against the tape cassette 2. After inserting the tape cassette 2 to a predetermined position of the table 1, the cassette storage table 1 is moved to the elevator mechanism 6
When the tape cassette 2 is engaged with a reel stand (not shown) on the substrate 7, the bottom surface of the tape cassette 2 comes into contact with a position regulating pin provided on the substrate 7 to regulate its position. However, because of the regulation, it is necessary to push downward from above.

As described above, according to the present invention, in a tape cassette loading device such as a video tape recorder or an audio tape recorder, the shape of the pressing lever is changed so that it is engaged with the step portion of the tape cassette inserted in the reverse direction. The reverse insertion of the tape cassette can be easily prevented by using a reverse insertion preventing lever having a central protruding portion that presses the engaging portion and the tape cassette against the sliding surface of the cassette storage table.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a cassette tape loading device according to an embodiment of the present invention when a tape cassette is reversely inserted,
2 is a partially cutaway side view of the same device when a cassette tape is normally inserted, FIG. 3 is a perspective view showing a tape cassette inserted into the same device, and FIG. 4 is a side view of a conventional cassette tape loading device. Is. 1 ... Cassette storage base, 1a ... Storage base sliding surface, 2 ... Tape cassette, 4 ... Step portion, 5 ... Insertion prevention lever, 5a
...... Fixed part, 6 ...... Elevator mechanism, 7 ...... Substrate, 11 ...
… Locking part, 12 …… Central protruding part.

Claims (1)

[Scope of utility model registration request] 1. A cassette storage base having a sliding surface into which a tape cassette having a step portion cut out at a front edge portion of a bottom surface is slidably inserted, and a tip end portion bent toward the sliding surface. The insertion preventing lever made of an elastic body having a protrusion protruding toward the sliding surface at the center, and the insertion preventing lever has the protrusion with respect to the sliding surface. Is smaller than the thickness of the tape cassette, and is located at a distance larger than the thickness of the step portion of the tape cassette, and the tip of the locking portion is located at a distance smaller than the thickness of the step portion of the tape cassette. The other end is fixed and arranged at an inclination, and the positions of the locking portion and the protruding portion are such that the protruding portion contacts the upper surface of the tape cassette when the tape cassette is normally inserted. Due to the elastic deformation of the insertion prevention lever due to the contact, A tape cassette loading apparatus which is configured such that the tip parts are moved to the larger a position than the thickness of the tape cassette with respect to the sliding surface.