JPS634470A - Tape cassette - Google Patents

Abstract

PURPOSE:To prevent a flaw on a tape or the sticking of dust or the like by providing an elastic member pressing a slide member acting the switching moment to a front cover while being pressed against the turning switch type front cover and releasing a means locking the sliding of a sliding member by a projection provided at a part of a tape cassette main body. CONSTITUTION:In the energizing state of a lock arm 21 by a torsion spring 22, the tip 21a of the lock arm 21 is placed with a more or less clearance between a case wall 1a and the projection 20 of a slider 15 at a part of a nearly U-shaped recess 14 of an upper half 1 of a tape cassette A. Even if the force in the escaping direction is exerted to the slider 15, the projection 20 is abutted with the lock arm 21 to inhibit the slider 15 from moving in the escaping direction and the front cover 3 is not opened. At the time of loading the tape cassette A to the tape cassette adaptor, the projection 23 is enclosed by a cassette housing 24 as being inserted by the slope of a front part 23b or a lower face part 23a and the locking between the lock arm 21 and the projection 20 of the slider 15 is released.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a tape cassette.

[Prior art and its problems]

The applicant of the present application has proposed a cheer cassette that is smaller than a standard type tape cassette, which is used by being attached to a standard type recording/reproducing apparatus (publication of Utility Model Publication No. 37744/1983). As shown in FIG. 6, this tape cassette A has a frame body composed of an upper half 1, a lower half 2, and a thin front cover 3 for protecting the tape. A supply reel 4 and a take-up reel 5 are arranged in this small tape cassette A, and the distance between the supply reel 4 and the take-up reel 5 is Supply side reel disk and winding of the standard type recording/playback device that cannot be installed by itself! ! The distance is set to be shorter than the distance to the side reel disc. A magnetic tape 8 is disposed between the supply reel 4 and the take-up reel 5, and is guided by a tape guide 6.7 and runs along a predetermined running path. The running of the magnetic tape 8 is such that when the tape cassette A is installed in a dedicated recording and reproducing device, the supply reel disk of the recording and reproducing device fits into the reel disk insertion hole 9 of the supply reel 4, and the recording The take-up reel disk of the playback device meshes with the teeth 10 formed on the lower flange of the take-up reel 5, and the supply reel 4 is moved in the magnetic tape sending direction by driving the supply reel disk and the take-up reel disk. The take-up reel 5 is rotated in the magnetic tape winding direction, and the magnetic tape 8 is wound from the supply reel 4 through the tape guide 6.7 onto the take-up reel 5. Become. Note that when this tape cassette A is installed in the recording/reproducing apparatus, it is necessary to resist the force of a leaf spring (not shown) that presses the supply reel 4 and take-up reel 5 against the lower half 2 side. Since the supply reel 4 is lifted toward the upper half l side by the supply reel disk, the uneven portion formed on the lower surface of the lower flange of the supply reel 4 and the uneven portion formed on the upper surface of the lower half 2 are The lock due to engagement is released,
The supply reel 4 becomes rotatable. Furthermore, when the reel 5 is attached to the recording/reproducing device, the claws (not shown) are released from the teeth 10 of the lower flange of the reel 5 on the take-up side, and the reel 5 on the take-up side can also be rotated. become of the state. Note that when this tape cassette A is not used for recording or reproduction, the supply side reel 4 and the take-up side reel are closed by the engagement of the concave and convex portions by the force of the plate spring and the engagement of the teeth 10 by the claws. 5 are locked to prevent the magnetic tape 8 wound around them from loosening. Since the supply reel 4 is rotated by inserting the supply reel disk into the reel disk insertion hole 9, a hole 1 is formed on the lower surface of the lower half 2 at a corresponding position.
1 is formed, and the rotation of the take-up reel 5 is controlled by teeth 10 formed on the circumferential side of the lower flange of the take-up reel 5.
This is done by meshing the take-up side reel disc with the lower half 2 at the corresponding position.
A notch 12 is formed in the take-up reel 5.
is arranged around a shaft (not shown) fixed by a screw 13 so as to rotate around this shaft. 14 is a substantially U-shaped recess formed on the side of the tape cassette A, 15 is a slider disposed in the groove between this recess 14 and the front lid 3, and 16 is a substantially U-shaped recess formed in the substantially U-shaped recess 14. It is a leaf spring inserted in a U-shape, and when the front cover 3 is opened, a rotational moment of 11' in the direction of closing the front cover is applied to the front M3, so that the front cover 3 is rotated as shown in FIG. Furthermore, when the front cover 3 is at mW, a rotational moment in the direction of closing the front cover 3 is applied to the front cover 3, so that the front cover 3 can maintain the closed state. Note that when the front lid 3 is opened or closed, one end of the front lid 3 comes into contact with one end of the upper half 1 or the lower half 2 of the tape cassette A, and even if an opening/closing moment is applied to the front lid 3, It is designed not to rotate beyond this point. That is, when a rotational force is applied to the front lid 3 in the open state in the direction of closing the lid and the front M3 is rotated around the hinge bin 17, the slider 15 is pushed rearward and the leaf spring 16 is rotated. When the slider 15 bends and exceeds a certain rotational position, the slider 15 is pushed forward by the elastic force of the leaf spring 16, and the front M3 is urged in the direction of closing the lid by the force of the slider 15. When a rotational force is applied to the front N3 in the lid closing direction from the open state shown in FIG. 6, the front lid 3 and the slider 15 operate in the opposite direction to the above case, and the front M3 is biased in the lid closing direction. It has become. However, in the tape cassette A having the above structure, although the closed state of the front cover 3 is maintained by the force of the leaf spring 16, there is a drawback that the force is not sufficient. That is, since the front cover can be easily opened with a finger or the like, there is a drawback that the tape is easily damaged and dust is likely to adhere thereto.

[Means to solve problems]

The present invention has been made in view of the above-mentioned problems, and includes a tape cassette main body, a rotary opening/closing front cover, a sliding member that presses against the front cover and applies an opening/closing moment, and the sliding member a resilient member that brings the moving member into pressure contact with the front lid; a locking member that locks the sliding movement of the sliding member; and a locking member that is configured by having a negative portion thereof protrude from the tape cassette main body to release the lock. The present invention provides a tape cassette equipped with a release means.

【Example】

1 to 5 show one embodiment of the tape cassette according to the present invention, FIG. 1 is a side view of the main part of the tape cassette, FIG. 2 is a plan view of the main part, and FIG. 4 is a mechanical diagram showing the locked state of the sliding member in this tape cassette, and FIG. 5 is a mechanical diagram showing the unlocked state of the active member in this tape cassette. It should be noted that the configuration of most of the tape cassettes in this example (
The configuration of the parts (excluding the locking mechanism and lock release mechanism for the slider 15, which is a sliding member) is almost the same as the configuration of the tape cassette A described as the prior art, so the same parts are designated with the same reference numerals. Detailed explanation will be omitted. In each figure, 20 is a projection provided at a predetermined position inside the slider 15, 21 is a lock arm provided in the tape cassette A corresponding to this projection 20, and 22 is a torsion spring. 22 biases the lock arm 21 in the counterclockwise direction in FIG. In this state, the slider 15 cannot be moved to the left in FIG. 4 (in the retracting direction of the slider 15 as the front cover 3 is opened and closed). That is, in the biasing layer of the lock arm 21 in the counterclockwise direction in FIG. 4 by the torsion spring 22,
The tip 21a of the lock arm 21 is configured to be positioned with some clearance between the case wall 1a in the approximately U-shaped recess 14 of the upper half 1 of the tape cassette A and the protrusion 20 of the slider 15. Therefore, even if a force in the retracting direction is applied to the slider 15, the protrusion 2
0 comes into contact with the lock arm 21, the slider 15 cannot move in the retracting direction, and the front lid 3 cannot be opened. Note that when a large opening force is applied to the front cover 3, the slider 15 moves somewhat in the retracting direction, and the lock arm 21 becomes slightly bent accordingly, but the lock arm 21 has its tip 21m attached to the case wall. 1a and protrusion 2
0, and the lock arm 21
Since the distal end 21m of the front cover 3 is supported by the case wall 1a, deformation of the lock arm 21 is suppressed. Therefore, the protrusion 20 is reliably locked by the lock arm 21, and movement of the slider 15 can be reliably prevented. cannot play rM base. 23 is a protrusion whose lower surface 23a side and front surface 23b side are inclined surfaces, and this protrusion 23 is connected to the lock arm 21.
The tip thereof is configured to protrude from a substantially U-shaped recess 14 provided in the upper half 1. Then, in order to use tape cassette A with a dedicated recording/playback device, insert this tape cassette A in the direction shown by the arrow X in Figure 2, or use this tape cassette A with a standard type recording/playback device. When this tape cassette A is inserted into the tape cassette adapter in the direction shown by the arrow Z in FIG. Alternatively, the lock arm 21 and the protrusion 20 of the slider 15 are unlocked by being pushed in by the inclined surface of the lower surface portion 23a as the slider is inserted. When the tape cassette is configured as described above, in the normal state when this tape cassette is not used, the leaf spring 1
A force greater than the repulsive force of 6 is the front'r! 3, the front cover 3 will not open, and therefore the protection and safety for the magnetic tape 8 will be further improved. That is, in the normal state, since the protrusion 23 is not pushed inside, the protrusion 20 of the slider 15 is locked on the rear side by the lock arm 21, and therefore cannot be moved in the retracting direction with the slider 15. Therefore, a force t! in the lid opening direction is applied to the front lid 3 whose one end is in contact with the slider 15! - The front cover 3 cannot be opened even if it is used.
High protection safety against magnetic tape. Such a locking mechanism and a release mechanism can be easily applied to the tape cassette described in the conventional example, for example, by simply adding the protrusion 20 of the slider 15, the lock arm 21, the torsion spring 22, etc. (It is possible to provide a tape cassette at an extremely low cost. Also, the protrusion 23 provided on the lock arm 21 is similar to the protrusion 2
Since it is provided closer to the center of rotation than the tip 21a that locks the lock arm Z1, the displacement of the tip 21& of the lock arm Z1 is large by only slightly moving the protrusion 23.
The locking and unlocking of the protrusions 20 is now performed reliably, so that there is no risk of inconvenience in the locking and unlocking operations even if the product has some variation in dimensions and the amount of pushing of the protrusions 23 is small. It has become. Furthermore, even if an extremely large opening force is applied to the front cover 3, the tip 21a of the lock arm 21 is reliably supported by the case wall 1a of the tape cassette 1, and the lock arm 21 will not be bent significantly. , the certainty of the lock is extremely high. Further, the force that the front M3 receives due to the force from the leaf spring 16 that biases the front lid 3 in the opening direction is partially unobstructed even when the lid is closed; Even when the locking mechanism with 21 is in operation, the front lid 3 is always subjected to a moment in the closing direction by the plate spring 16, and the front lid 3 never gets stuck. Furthermore, since the thickness of the front M3 is usually thin, forming a recess in the front M3 and arranging a locking member that fits into the recess allows for a locking mechanism to be provided directly to the front lid 3. It is easier to configure the structure as described above, that is, to configure the locking mechanism in the slider 15. Furthermore, since no locking member is provided on the front lid 3, there is no obstacle to the feeding and running of the magnetic tape from the tape cassette. It should be noted that the above embodiment is only one embodiment of the present invention, and for example, instead of providing the protrusion 20, the recess is provided on the slider 15.
Alternatively, the lock arm 21 may be configured to move vertically to the case wall 1a instead of rotating. You can. [Effect] The tape cassette according to the present invention includes a tape cassette main body, a rotary opening/closing front lid, a sliding member that presses against the front lid and applies an opening/closing moment, and a sliding member that includes the sliding member. An elastic wedge member that is brought into pressure contact with the cram school, a locking means that locks the sliding movement of the sliding member, and a releasing means that releases the lock by the locking means that is configured by partially protruding from the tape cassette main body. Therefore, under normal conditions when this tape cassette is not used for recording and playback,
The closed state of the front cover can be maintained reliably, the protection against magnetic tape is high, and the locking means is provided to lock the sliding of the sliding member, which is better than when the locking means is provided directly on the front cover. It also has the advantage of being simple.

[Brief explanation of drawings]

1 to 5 show one embodiment of the tape cassette according to the present invention, FIG. 1 is a side view of the main part of the tape cassette, FIG. 2 is a plan view of the main part, and FIG. 4 is a mechanical diagram showing the locked state of the sliding member in this tape cassette, FIG. 5 is a mechanical diagram showing the unlocked state of the sliding member in this tape cassette, and FIG. 6 is a front view of the main parts. It is a perspective view of a conventional tape cassette when the front M lid is opened. A... Tape cassette, 1... Upper half, 2...
Lower half, 3... Front lid, 14... Roughly U-shaped recess,
15... Slider (sliding member), 16... Leaf spring (
elastic member), 20... protrusion, 21... lock arm, 22... torsion spring, 23... protrusion, 2
3a...lower surface part, 23b...front part. Patent applicant: Victor Japan Co., Ltd. Figure 3 Figure 4 Figure 5 Figure 6

Claims (2)

[Claims] (1) A tape cassette main body, a rotary opening/closing front cover,
a sliding member that presses against the front lid and applies an opening/closing moment; a resilient member that presses the sliding member against the front lid; a locking means that locks sliding of the sliding member; and the tape cassette. 1. A tape cassette comprising: a release means for releasing the lock by the lock means, a part of which protrudes from the main body. (2) The tape cassette according to claim 1, wherein the locking means is regulated by the case wall of the tape cassette when locked.