JPH0544751B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tape cassette that is most suitable for application to recording and reproducing devices such as video tape recorders and other various information processing applications.

Structure of a conventional example and its problems A conventional cassette tape using the β magnetic recording/reproducing method will be explained with reference to FIGS. 1 to 3. In the figure, reference numeral 1 denotes a tape cassette body, in which a pair of tape reels 2 on which tape 3 is wound is stored, and tape guides 4 are provided on both sides of the front opening of the tape cassette body 1. A tape 3 is stretched between tape guides 4, 4 on both sides, and the stretched tape 3 is protected by an opening/closing lid 5. In order to lock the opening/closing lid 5, the opening/closing lid 5 is
A through hole 5a is provided on the side surface of the tape cassette body 1.
A lock plate 6 is rotatably provided inside the side wall 1a, and the lock plate 6 is urged to rotate toward the side wall 1a by an elastic body 7. The lock plate 6 is provided with a protrusion 6a that passes through the through hole 1b provided in the side wall 1a and engages with the through hole 5a of the opening/closing lid 5, thereby locking the opening/closing lid 5 in the closed state. Ru. The opening/closing lid 5 is unlocked when a protrusion (not shown) provided on the cassette holder of the video tape recorder is inserted into the tape cassette body 1.
This is done by inserting the lid through the notch 5b of the opening/closing lid 5 provided on the front surface of the lid. That is, since the protrusion of the cassette holder comes into contact with the head inclined surface 6b of the lock plate 6 provided in the tape cassette body 1, the lock plate 6 rotates about the rotation axis 6d. As a result, the engagement between the through hole 5a of the opening/closing lid 5 and the protrusion 6a of the lock plate 6 is released.
The opening/closing lid 5 is in a state where it can be opened. Here, in the open state of the opening/closing lid 5 as shown in FIG. 2, the end 6c of the lock plate 6 is close to the tape 3 drawer direction to narrow the tape 3 drawer opening.
The drawing angle of the tape 3 is limited to a range of θ ₁ . Therefore, there are restrictions on the size and shape of the loading mechanism of the video tape recorder, the draw-out angle of the tape draw-out post, etc. Also, if the tape pull-out angle is required to be greater than θ ₁ , the number of posts will increase.
Costs were rising.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional tape cassette, and an object thereof is to provide a tape cassette which has a wide tape drawer opening on the front surface of the tape cassette main body and is compatible with various tape running mechanisms of video tape recorders. .

Structure of the Invention In order to achieve the above object, the tape cassette of the present invention has an opening at the front surface of the tape cassette that stores the tape reel, and an opening/closing lid is provided in the opening, and the opening/closing lid is opened/closed when the opening/closing lid is closed. A lock plate is provided inside the side surface of the tape cassette body covered by the lid so as to be able to slide parallel to the side wall of the tape cassette body, and one end of the lock plate is pressed with an elastic body and biased toward the opening. The lock plate is provided with a protrusion that penetrates through a hole provided in the side surface of the tape cassette body and locks the rotation of the opening/closing lid, and by pushing the lock plate against the elastic body, the The protrusion is arranged to deviate from the rotation locus of the opening/closing lid.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the drawings (FIGS. 4 to 8).

In the drawings, the same reference numerals as those in the conventional example indicate the same members, and detailed explanation thereof will be omitted. The tape cassette of this embodiment has the lock plate 6 and elastic body 7 of the conventional example.
Instead, a lock plate 8 and an elastic body 9 shown in FIGS. 4 to 8 are provided.

To explain in detail in the figure, the tape cassette main body 1
A lock plate 8 is slidably installed between the side wall 1a and the guide plate 1c, and the terminal end 8a of the lock plate 8 is pushed by an elastic body 9 to urge it toward the front opening of the tape cassette body 1. are doing. Then, the protrusion 8b on the side surface of the lock plate 8 is inserted into the through hole 1b provided in the side wall 1a of the tape cassette body 1.
Penetrate and protrude from. As a result, when the opening/closing lid 5 attempts to rotate around the fulcrum 5c, the side surface of the opening/closing lid 5 comes into contact with the protrusion 8b of the locking plate 8, so that the opening/closing lid 5 is locked (see FIG. 6).

When unlocking the opening/closing lid 5, as shown in FIG. It is inserted from part 5b. As a result, the protrusion of the cassette holder comes into contact with the front end 8c of the lock plate 8 provided inside the tape cassette body 1.
The lock plate 8 slides rearward parallel to the side wall 1a. Therefore, since the projection 8b of the lock plate 8 also moves rearward, when the opening/closing lid 5 tries to rotate around the fulcrum 5c, the side surface of the opening/closing lid 5 does not come into contact with the projection 8b of the lock plate 8, so that the opening/closing is not possible. The lid 5 becomes openable.

Here, since the lock plate 8 does not move in the tape pull-out direction like the conventional lock plate, the tape pull-out angle becomes as large as θ ₂ as shown in FIG. Therefore, the size and shape of the loading mechanism of the video tape recorder,
Moreover, the design range for the draw-out angle of the tape draw-out post is widened.

Effects of the Invention As described above, according to the present invention, the tape drawer opening of the tape cassette main body is widened by making the operating direction of the lock plate parallel to the side wall of the tape cassette main body when locking and unlocking the opening/closing lid. This increases the range of tape pull-out angles. Therefore, the design range of the loading size and shape of the video tape recorder, the draw-out angle of the tape draw-out post, etc. is widened, and the cost of the video tape recorder can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a tape cassette of the conventional beta magnetic recording/reproducing system, Fig. 2 is a plan sectional view of the main part of the tape cassette, Fig. 3 is a perspective view of the lock plate of the tape cassette, and Figs. 8 shows an embodiment of the present invention, FIG. 4 is a perspective view of the tape cassette, FIG. 5 is a perspective view of the lock plate, FIG. 6 is a side view of the main parts with the opening/closing lid in the closed state, FIG. 7 is a side view of the main part with the opening/closing lid in the open state, and FIG. 8 is a plan sectional view of the main part of the tape cassette. 1... Tape cassette body, 1a... Side wall, 1
b...Through hole, 1c...Guide plate, 2...Tape reel, 3...Tape, 5...Opening/closing lid, 5b...Notch, 5c...Fully point, 8...Lock plate, 8a
...Terminal end, 8b...Protrusion, 8c...Front end, 9
...Elastic body.

Claims (1)

[Claims] 1. The front surface of the tape cassette that stores the tape reel is an opening, and the opening is provided with an opening/closing lid;
In the closed state of the opening/closing lid, a lock plate is slidable parallel to the side wall of the tape cassette body inside the side surface of the tape cassette body covered by the opening/closing lid, and one end of the lock plate is pressed with an elastic body to open the opening. The lock plate is provided with a protrusion that penetrates through a hole provided in the side surface of the tape cassette body and locks the rotation of the opening/closing lid. The tape cassette is configured such that the protrusion is moved out of the rotation locus of the opening/closing lid by pushing against the opening/closing lid.