JP2570694B2 - Tape cassette - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

 The present invention relates to a tape cassette.

[Prior art and its problems]

The applicant of the present application has proposed a tape cassette smaller than a standard type tape cassette which is used by being attached to a standard type recording / reproducing apparatus (Japanese Utility Model Publication No. 60-37744). As shown in FIG. 8, the tape cassette A has an upper half 1, a lower half 2, and a thin front cover 3 for protecting the tape. In this small tape cassette A, a supply reel 4 is provided.
And a take-up reel 5 are provided. The distance between the supply-side reel 4 and the take-up reel 5 is a supply-type reel of a standard type recording / reproducing apparatus which cannot be mounted only with this small tape cassette A. The distance is set shorter than the distance between the disk and the take-up reel disk. Further, between the supply side reel 4 and the take-up side reel 5, a magnetic tape 8 guided by tape guides 6, 7 and traveling on a predetermined traveling path is arranged. When the tape cassette A is mounted on a dedicated recording / reproducing device, the supply-side reel disk of the recording / reproducing device fits into the reel disk insertion hole 9 of the supply-side reel 4 when the magnetic tape 8 runs. The take-up reel disk of the reproducing device meshes with a gear 10 formed on the lower flange of the take-up reel 5, and the supply-side reel 4 and the take-up reel disk drive the supply-side reel 4 in the magnetic tape feeding direction. And the take-up reel 5 is rotated in the magnetic tape take-up direction.
Is wound on the winding reel 5 from the supply reel 4 via the tape guides 6 and 7. When the tape cassette A is mounted on the recording / reproducing apparatus, the supply reel 4 and the take-up reel 5 are pressed against the lower half 2 by a leaf spring (not shown). Since the supply-side reel 4 is lifted by the supply-side reel disk toward the upper half 1, the unevenness formed on the lower surface of the lower flange of the supply-side reel 4 and the unevenness formed on the upper surface of the lower half 2 are different. The lock due to the engagement is released, and the supply-side reel 4 enters a rotatable state. Further, at the time of mounting on the recording / reproducing apparatus, the engagement of the pawl (not shown) with the gear 10 of the lower flange of the winding side reel 5 is released, and the winding side reel 5 is rotatable. State. When the tape cassette A is not used for recording and reproduction, the supply-side reel 4 and the take-up side reel 4 are engaged by the engagement of the concave and convex portions by the force of the leaf spring and the locking of the gear 10 by the pawl. Numerals 5 are locked to prevent the magnetic tape 8 wound around them from becoming loose. The rotation of the supply-side reel 4 is performed by inserting the supply-side reel disk into the reel disk insertion hole 9. Therefore, a hole is formed in the lower surface of the lower half 2 at a position corresponding to the rotation.
The take-up reel 5 is rotated by a gear 10 formed on the peripheral side of the lower flange of the take-up reel 5.
This is performed by engaging the take-up reel disc of the apparatus with the take-up reel. Therefore, a notch 12 is formed in the lower half 2 at a position corresponding to this, and the take-up reel 5 is Is supported by this shaft so as to rotate about a fixed shaft (not shown). 14 is a substantially U-shaped recess formed on the side of the upper half 1 of the tape cassette A; 15 is a slider arranged in a groove formed between the recess 14 and the front cover 3; U-shaped recess
14 is a leaf spring inserted and arranged in a substantially U-shape. When the front cover 3 is opened, a rotational moment in the opening direction acts on the front cover 3 so that the front cover 3 is opened as shown in FIG. When the front lid 3 is closed, a rotational moment in the closing direction is applied to the front lid 3 so that the front lid 3 can be kept closed. When the front cover 3 is opened and closed, one end of the front cover 3 contacts one end of the upper half 1 or the lower half 2 of the tape cassette A. The above does not rotate. That is, when a rotational force in the opening direction is applied to the front lid 3 in the closed state, and the front lid 3 is rotated about the hinge pin 17, the slider 15 is thereby crushed rearward,
The leaf spring 16 bends, and when exceeding a certain rotational position, the slider 15 is crushed forward by the repulsive force of the leaf spring 16,
When the front cover 3 is biased in the opening direction by the force of the slider 15, and when a rotational force in the closing direction is applied to the front cover 3 from the open state shown in FIG. 15 operates in the reverse of the above-described case, and the front cover 3 is biased in the closing direction. However, in the tape cassette A having the above configuration, although the closed state of the front cover 3 is maintained by the force of the leaf spring 16, there is a disadvantage that it is not sufficient. That is, since the front lid 3 can be easily opened with a finger or the like, there is a defect that the magnetic tape 8 is easily damaged or dust or the like is easily attached.

[Means to solve the problem]

The present invention has been made in view of the above problems,
A tape cassette main body, a rotary opening / closing type front lid, and a sliding member that presses against the front lid to exert an opening / closing moment;
Resilient means for pressing the sliding member against the front cover, and shifting means for shifting the sliding member to a position for restricting sliding of the sliding member so that the front cover cannot be opened when the tape cassette is not used. An object of the present invention is to provide a tape cassette having an unlocking portion provided by projecting a part of the tape cassette body from the tape cassette main body so as to displace the sliding member to a slidable position.

【Example】

1 to 4 show one embodiment of a tape cassette according to the present invention. FIG. 1 is a side view of a main part of the tape cassette, and FIG. 2 is a line XX in FIG. 3, FIG. 3 is a cross-sectional view taken along line YY in FIG. 1, and FIG. 4 is a cross-sectional view taken along line XX in FIG. 1 when the sliding member is slidable. It is. Note that most of the configuration of the tape cassette in the present embodiment is substantially the same as the configuration of the tape cassette A described as the related art, so that the same portions are denoted by the same reference numerals and detailed description thereof will be omitted. In each of the figures, reference numeral 20 denotes a leaf spring as a shifting means for shifting the slider 15 to a position outside the tape cassette A, and the slider 15 is urged outward by the leaf spring 20 to regulate its position. In this state, the step 15a at the rear of the slider 15 is locked by the locking portion 1a, which is a part of the upper half 1 of the tape cassette A, and the slider 15 is retracted (second position).
(Left direction in the figure). That is, in the non-use state where the tape cassette A is stored, since the movement of the slider 15 is regulated by the leaf spring 20 to the predetermined position, the slider performing the retreating operation with the opening operation of the front lid 3 is performed. 15 Reverse movement is stepped
The front cover 3 is prevented from being opened by being blocked by the engagement between the engagement portion 15a and the locking portion 1a. Incidentally, even when the stepped portion 15a is engaged with the locking portion 1a, the forward movement of the slider 15 is not restricted, so that the slider 15 receives the repulsive force of the leaf spring 16 and The front cover 3 is urged forward (to the right in FIG. 2), so that a moment in the closing direction is applied to the front cover 3 from the leaf spring 16 via the slider 15, so that the front cover 3 does not rattle. 21 is a push plate, this push plate
When a force in the inward direction (right side in FIG. 3) is applied to the push plate 21, the push plate 21 moves inside the tape cassette A,
As a result, the slider 15 is moved inward against the repulsive force of the leaf spring 20, and as shown in FIG. The engagement with the portion 1a is released, and the slider 12 is slidable in the left-right direction in FIG. That is, the slider 15 is configured not only to be movable in the longitudinal direction of the slider 15 but also to be movable in a direction substantially orthogonal to the longitudinal direction of the slider 15. When the tape cassette is configured as described above, when the tape cassette A is not used, the leaf spring 16 is used.
Even if a force larger than the repulsive force acts on the front cover 3, the front cover 3 will not be opened, and the protection and safety for the magnetic tape 8 will be further enhanced. That is, in the normal state, the slider 15 is urged outward by the force of the leaf spring 20, and in this state, the step 15a of the slider 15 and the locking portion 1a are engaged, so that The slider 15 cannot slide in the retreating direction. Therefore, even if a force in the opening direction is applied to the front lid 3 whose one end abuts on the slider 15, the front lid 3 cannot be opened,
The protection safety for the magnetic tape 8 is high. In particular, even if a large opening force is applied to the front cover 3, since the stepped portion 15a of the slider 15 is engaged with a part of the tape cassette A main body, a special support for locking the front cover 3 is provided. Even if no special measures are taken, the lock on the front lid 3 is reliable, and the protection and safety of the magnetic tape 8 is high. Then, when the tape cassette A is mounted on a dedicated recording / reproducing apparatus or this tape cassette A is mounted on a tape cassette adapter for use in a standard type recording / reproducing apparatus, the cassette housing 22 of the recording / reproducing apparatus or the tape cassette adapter is used. As a result, as shown in FIG. 4, the push plate 21 receives the inner force and the slider 15 is pushed in, so that the engagement between the step portion 15a of the slider 15 and the locking portion 1a is released and the front cover 3 is opened. When a force in the direction of the lid acts, the front lid 3 opens. That is, locking and unlocking of the front cover 3
No special operation is required, and the locking and unlocking mechanism is extremely simple, that is, it is very simple because it is configured to be operated only by changing the position of the slider 15. . Further, since there is no need to provide a lock member on the front lid 3, the magnetic tape is not fed out of the tape cassette A, and no trouble occurs in running. In the above embodiment, the push plate 21 is
Although the case where the slider 15 is constructed separately from the above is described, this may be an integral construction as shown in FIGS. 5 to 7, and the slider 15 has a step 15a. However, this may be configured to form a concave portion or a convex portion.

【effect】

The tape cassette according to the present invention includes a tape cassette main body, a pivotable open / close front cover, a sliding member that presses against the front cover to exert an opening / closing moment, and presses the slide member against the front cover. Resilient means for causing the sliding member to move to a position for restricting sliding of the sliding member so that the front cover cannot be opened when the tape cassette is not used; And a lock release portion provided by projecting a part of the tape cassette from the main body of the tape cassette so as to be displaced to a position, so that in a normal state where the tape cassette is not used for recording / reproduction, The closed state can be reliably maintained, the protection safety against magnetic tape is high, and the front lid is locked and unlocked by changing the position of the sliding member, making the configuration extremely simple. Also, before because nor directly provide a locking mechanism in the lid with the features of such less likely to occur is a failure in feeding or the like of the tape from the tape cassette.

[Brief description of the drawings]

1 to 4 show an embodiment of the tape cassette according to the present invention. FIG. 1 is a side view of a main part, and FIG.
3 is a cross-sectional view taken along a line YY in FIG. 1, and FIG. 4 is a cross-sectional view taken along a line X-Y in FIG. 1 when the sliding member is slidable. 5 to 7 show another embodiment of the tape cassette according to the present invention. FIG. 5 is a side view of a main part, and FIG. FIG. 7 is a cross-sectional view taken along the line XX, FIG. 7 is a cross-sectional view taken along the line XX in FIG. 5 in a state where the sliding member is slidable, and FIG. 8 is a perspective view of a conventional tape cassette. . A ... tape cassette, 1 ... upper half, 1a ... locking part, 2 ... lower half, 3 ... front lid, 15 ... slider (sliding member), 15a ... step section, 16 ... Leaf spring (stepping means), 2
0: leaf spring, 21: push plate (lock release part).

Claims (1)

(57) [Claims] 1. A tape cassette main body, a rotary opening / closing type front lid, a sliding member which presses against the front lid to exert an opening / closing moment, and a resilient member which presses the sliding member against the front lid. Means, a shifting means for shifting the sliding member to a position for restricting the sliding of the sliding member so that the front lid cannot be opened when the tape cassette is not used, and displacing the sliding member to a position where the sliding member can be slid. A tape unlocking portion provided so that a part of the tape cassette protrudes from the tape cassette body.