JPS6128295Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tape cassette position regulating mechanism.
A tape cassette that can effectively regulate the position of a tape cassette stored in a tape cassette storage body, especially in the vertical direction, by providing recesses or protrusions that engage with each other on the tape cassette and the tape cassette storage body. The purpose is to provide a position regulation mechanism.

Conventionally, when a tape cassette used in a recording/reproducing machine such as a video tape recorder is housed, the vertical position of the tape cassette is controlled by the entire bottom surface of the tape cassette.
Therefore, the bottom surface of the tape cassette must be formed extremely accurately to serve as a reference surface for position regulation, and the entire bottom surface of the tape cassette must be precisely formed, for example, in a horizontal plane. is extremely difficult. Moreover, if distortion occurs on the bottom surface, the vertical position of the tape cassette will not be properly regulated, making it impossible to store the tape cassette properly, and thus preventing the smooth running of the magnetic tape within the tape cassette. This results in poor recording and playback conditions.
Furthermore, making the entire bottom surface of the tape cassette lie on a horizontal plane increases the cost accordingly.

The present invention eliminates the above drawbacks, and one embodiment of the tape cassette position regulating mechanism according to the present invention will be described below.

Figures a, b, c, and d are smaller than standard type cassettes used when attached to a recording/reproducing apparatus such as a standard type video tape recorder, for example, used when attached to a portable type recording/reproducing apparatus. These are a plan view, a side view, a rear view, and a bottom view of a small cassette with a small amount of tape. Fig. 2 is a plan view with the upper half of this small cassette removed, Fig. 3 is a cross-sectional view, and Figs. 4 and 5. 6 and 6 are partially enlarged explanatory views of the small cassette.

In the figure, A is a small cassette, and the frame of this small cassette A consists of an upper half 1, a lower half 2, and a front lid 3 for protecting the tape.
The hinge part 4 is formed by molding a part thinly of resin such as polypropylene, and the front cover 3 is normally biased in the closing direction by the action of a leaf spring 5, and the upper half 1 is closed. is attached to. A hole 6 is formed in the lower half 2, and a protrusion 7 is formed in the front cover 3. When the front cover 3 is closed, the protrusion 7 engages in the hole 6, and the front cover 3 has a lock. It's starting to take a while. By pressing the protrusion 7 and moving it backward, the locked state between the protrusion 7 and the hole 6 is released, and the front cover 3 can be rotated and opened against the repulsive force of the leaf spring 5. It's becoming like that.

A supply reel 8 and a take-up reel 9 are disposed in this small cassette A, and the distance between the supply reel 8 and take-up reel 9 is such that it cannot be installed with only this small cassette A. The distance is shorter than the distance between the supply side and take-up side reel disks of a standard type recording/reproducing device. The magnetic tape 10 is arranged so that it runs along a predetermined running path between the supply reel 8 and the take-up reel 9. That is, the magnetic tape 10
is from the supply side reel 8 to the guide holes 11 and 12.
After passing through the film, the film is wound onto the winding reel 9. An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8, and can also engage with the uneven groove 14 at a predetermined position of the lower half 2 corresponding to the uneven groove 14 of the lower flange 13. An uneven groove 15 is formed, and the supply reel 8 is normally urged toward the lower half 2 by the action of a leaf spring 16 attached to the upper half 1, and the uneven grooves 14 and 15 engage with each other. , supply side reel 8
is fixed to prevent the magnetic tape wound on the supply reel 8 from loosening. When the small cassette is installed in the recording and reproducing apparatus, the supply reel 8 is lifted by the supply reel disk 80 of the recording and reproducing apparatus by a specified amount toward the half 1 side against the repulsive force of the leaf spring 16. The engaged state between the uneven grooves 14 and 15 is released. That is, in the lower half 2 at a position corresponding to the supply reel 8, there is a hole 1 for inserting the supply reel disk 80 of the recording/reproducing device.
7 is formed, and this supply reel disk 80 is inserted into the supply reel 8.
The take-up reel 9 has a shaft 1 fixed to the lower half 2.
8 and is rotatable about this shaft 18. This shaft 18 can be attached to the lower half 2 by, for example, forming a groove 19 in the lower part of the shaft 18, and forming a protrusion 20 on the lower half 2 to fit into the groove 19. With the convex part 20 fitted into the concave groove 19, screw 2
If the shaft 18 is screwed onto the lower half 2 using the first screw,
Since the shaft 18 does not rotate idly during screwing, it can be easily installed. Teeth 23 are formed on the outer periphery of the lower flange 22 of the take-up reel 9.
A notch 24 is formed at a predetermined location in the lower half 2 so that, for example, a gear can be engaged with the teeth 23. Then, a predetermined driving force transmission mechanism such as a gear that meshes with the teeth 23 causes the take-up reel 9 to
rotates, and the magnetic tape passes through a predetermined running path from the supply reel and is wound onto the take-up reel.

This take-up reel 9 is provided with a brake mechanism so that the take-up reel 9 does not rotate when the small cassette A is not attached to the recording/reproducing apparatus. This brake mechanism includes, for example, a pawl 25 that engages with teeth 23 of the lower flange 22 of the take-up reel 9, and this pawl 25 engages the shaft 2 of the lower half 2.
6 and is biased by the action of the spring 27, the claw 25
is engaged with the teeth 23 of the lower flange 22, so that the take-up reel 9 does not rotate and the magnetic tape does not loosen. In order to release this locked state and allow the take-up reel 9 to rotate, a pin is inserted through the hole formed in the lower half 2, and the pin is used to push the pawl 25 against the repulsive force of the spring 27. 25 and the lower flange 2 of the take-up reel 9.
The take-up reel 9 is placed in a free state and can rotate.

In addition, in the upper half and lower half of the small cassette,
A locking recess and a protrusion are formed at the joint end of the upper half and the lower half, and the upper and lower halves are temporarily fastened by fitting the protrusion and the recess, and then screwed together. Strongly connect the two.

FIGS. 7, 8, 9, and 10 are explanatory diagrams of an adapter used when the above-mentioned small cassette A is attached to a standard type recording/reproducing apparatus.

In the figure, reference numeral B denotes an adapter that can accommodate the small cassette A therein and has a size and shape that allows it to be attached to a standard type recording/reproducing device.

The frame of this adapter B consists of a lower half 51 and an upper half 52, and the lower half 51 is formed with a storage section 53, which is a notch in which the small cassette A is stored. This housing section 53 has protrusions 54, 55, 56, 57 that support the small cassette A at its ends, which are integrally formed with the lower half 51 of the frame of the adapter B, and the lower half 2 of the small cassette A. Recesses 28, 29, 30, 31 are formed on the ridgeline between the bottom and side surfaces of the lower half 2 of the small cassette A, corresponding to the positions of the protrusions 54, 55, 56, 57, These protrusions and recesses are used to position the small cassette A, particularly in the vertical direction. When these protrusions and recesses abut against each other, the bottom surface of the small cassette and the bottom surface of the adapter are made to be approximately on the same plane.
Further, pins 58 and 59 are implanted in the protrusions 54 and 55, and these pins 58 and 59 are connected to the small cassette A.
The pin 58 is inserted into the holes 32 and 33 formed in the lower half 2 of the cassette A, thereby further positioning the small cassette A.
It also functions to release the brake of the take-up reel 9. That is, the positions of the pin 58 and the hole 32 are such that when the pin 58 is inserted into the hole 32, the position of the small cassette A is
The position is such that the pin 58 lifts the pawl 25, which is the brake mechanism of the take-up reel 9.

When the adapter B with the small cassette A inserted therein is attached to a standard type recording/playback device, the supply side reel disk of the two reel disks of the recording/playback device is inserted into the supply side reel 8 of the small cassette A. However, since the take-up reel disk cannot be inserted into the take-up reel 9, the take-up reel disk is inserted into the lower half 51 of the adapter B at a position corresponding to the position of the take-up reel disk. A gear 60 that is driven by the motor is attached. Further, when the small cassette A is stored in the adapter B, a gear 61 that meshes with the teeth 23 of the lower flange 22 of the take-up reel 9 of the small cassette A is attached to the lower half 51 so as to mesh with the gear 60. , and the state of engagement between the claw and the tooth is pin 58.
Since the magnetic tape is released by , the driving force of the recording/reproducing machine is transmitted to the supply reel 8 and take-up reel 9 of the small cassette A, and the magnetic tape begins to run. That is, even if you try to install small cassette A into a standard type recording/reproducing machine, the relative positions of the supply side reel and take-up side reel of small cassette A will be the same as the supply side reel disk and the take-up side reel disk of the recording/playback machine. Since it is not the same relative position as
For example, if the supply reel disk is placed on the supply reel, a gear similar to that of the take-up reel is provided at the position of the take-up reel disk, and the driving force is transferred between this gear and the take-up reel of the small cassette. By providing a transmission means, the driving force of a standard type recording/reproducing machine can be transmitted to the small cassette A.

Furthermore, notches 3 and 35 are formed on both shoulders of the upper half 1 of the small cassette A, and
The upper half 52 is formed with walls 62, 63 corresponding to the positions of the notches 34, 35, and when the upper half 52 is aligned with the lower half 51 and, for example, screwed together, the small cassette A is attached to the adapter. In addition, the top surface of the small cassette and the top surface of the adapter are made to be approximately on the same plane.

When using the above-mentioned small cassette A by attaching it to a recording/playback device exclusively for this small cassette, such as a portable type recording/playback device, attach a standard type cassette to the standard type recording/playback device. As in the case of use, when the small cassette is inserted into the pop-up mechanism of the recording/reproducing device and the pop-up mechanism is moved to the operating position, the front lid of the small cassette A opens, and the front cover of the small cassette A is opened. Notch 3
At steps 6, 37, and 38, the loading pole, capstan, etc. of the recording/reproducing device are inserted inside the magnetic tape, and the supply reel disk of the recording/reproducing device is fitted to the supply reel of the small cassette.
In addition, the teeth of the lower flange of the take-up reel mesh with a gear-like driving force transmission mechanism to the take-up reel in the adapter B of the recording/reproducing device, and the driving force of the recording/reproducing device is also transmitted to the take-up reel. Become so. Furthermore, the convex portions of the recording/reproducing device are aligned with the recesses 28, 29, 30, and 31 formed in the lower half 2 of the small cassette, and the pins of the recording/reproducing device are inserted into the holes 32, 33 of the lower half to record. The position of the small cassette A is regulated within the reproducing apparatus, and the locking state of the claw on the take-up reel of the small cassette A is released, and the magnetic tape is maintained in a running state. Then, the magnetic tape is unwound from the small cassette by the loading pole, is attached to the magnetic head, and the driving force is transmitted to the take-up reel so that the magnetic tape runs along a predetermined running path, and recording and playback are performed. It will be done.

When using this small cassette A with a standard type recording/playback device, attach the small cassette A to the adapter B, and then attach this adapter B to the recording/playback device in the same way as when using a standard type cassette. Perform recording and playback. That is, first, with the front lid of small cassette A opened, small cassette A is stored in the storage section of adapter B, and in this stored state, the magnetic tape wound on the supply reel is opened and the front lid of small cassette A is opened. Pull out a predetermined amount of magnetic tape from the front cover, attach this magnetic tape to guide poles 64, 65, and 66 provided on adapter B, arrange the magnetic tape in the same way as the magnetic tape in a standard type cassette, and then insert the magnetic tape into the adapter. B
Align the upper half with the lower half and tighten the screws. Since the small cassette A stored in the adapter B is constructed in the same way as a standard type cassette, it can be recorded and reproduced by being attached to a standard type recording/reproducing machine. That is,
When the small cassette is attached to the adapter, the gear 61 of the adapter meshes with the teeth of the lower flange 22 of the take-up reel 9, and the pin 58 of the adapter engages the claw 2.
5 against the repulsive force of the spring, the take-up reel 9 is released from the locked state, and the driving force of the take-up reel disk is transferred to the gear 60,
61. Conversely, when the small cassette is taken out of the adapter, the engagement between the take-up reel 9 and the gear 61 is disengaged, and the pin 58 is removed from the small cassette, so that the claw 25 is restored by the repulsive force of the spring 27. , the take-up reel 9 is in a locked state.

In order to attach the magnetic tape in the small cassette to the guide pole of the adapter, for example, press the supply reel directly with your hand to release the locked state of the supply reel, and then open the front cover of the magnetic tape. Attach the small cassette to the lower half of the adapter by hand, and attach the pulled-out magnetic tape directly to the guide hole of the adapter by hand, or insert the unlocked magnetic tape into a suitable place. It can be attached using a pull-out mechanism.

Furthermore, if the gear 61 is configured to have a small degree of freedom in position setting, the gear 61 may be moved when, for example, a small cassette is attached to or removed from the adapter, and the gear 61 may be moved to the gear 60 during attachment. By allowing the cassette to mesh with the teeth of the lower flange of the take-up reel, it becomes convenient to attach and remove the small cassette from the adapter.

By configuring the tape cassette position regulating device as described above, that is, by using the concave or convex portions formed on the tape cassette and the convex or concave portions formed on the tape cassette storage body, the tape cassette position can be adjusted.
In particular, since the position is controlled in the vertical direction, the tape cassette storage body does not come into contact with the entire bottom surface of the tape cassette, and therefore the entire bottom surface of the tape cassette becomes the reference surface for vertical position regulation. Therefore, the entire bottom surface of the tape cassette does not have to be formed with such high precision. Therefore, manufacturing of the tape cassette becomes simpler and its cost becomes lower. That is, since the position of the tape cassette in the vertical direction is restricted only in part, it is only necessary to form this part with high precision. In particular, the position regulating part is formed at the ridgeline between the end bottom and side surfaces of the tape cassette, so even if the center of the bottom of the tape cassette is distorted due to heat, etc. Since the end portion has a side wall, etc., it is difficult to cause distortion, and as a result, position regulation is extremely accurate and highly durable. Note that these uneven portions can also simultaneously regulate the position within the horizontal plane. Then, the position of the tape cassette stored in the tape cassette storage body is accurately regulated, and the set position of the tape cassette becomes accurate, so the tape path becomes accurate and the running condition of the magnetic tape becomes smooth. Therefore, recording and reproduction can be performed satisfactorily. Furthermore, since the top and bottom surfaces of the tape cassette are made to be approximately flush with the top and bottom surfaces of the adapter, the adapter containing the tape cassette looks just like a standard type tape cassette, for example. The operation of attaching this adapter to, for example, a standard type recording/reproducing machine is the same as the operation of attaching a standard type tape cassette, and since the attachment work is no different, there is no confusion or inconvenience.

As described above, the tape cassette position regulating mechanism according to the present invention provides a plurality of concave or convex portions on the ridge line between the bottom and side surfaces of the tape cassette, and
When a tape cassette is stored in the tape cassette storage body, a convex or concave portion is integrally provided on the tape cassette storage body at a position corresponding to the recessed portion of the tape cassette, and by fitting these concave and convex portions, the tape cassette storage body can be stored inside the tape cassette storage body. Since the position of the tape cassette can be regulated using the tape cassette, the position regulation of the tape cassette, especially in the vertical direction, is good and accurate.Furthermore, since only a part of the tape cassette is used for position regulation, it is possible to regulate the position of the tape cassette. Furthermore, in the case of a tape cassette, the position regulating part is located at the ridgeline between the bottom and side parts of the tape cassette. Even if it were to become distorted due to heat, the part where the concave or convex part is formed is reinforced by the side parts, so it is extremely unlikely that the reference plane that regulates the position in the vertical direction will be distorted. Since the positional regulation is accurate, the tape path is also accurate, and the running condition of the magnetic tape etc. is smooth, so that recording and reproduction can be performed satisfactorily.

[Brief explanation of the drawing]

1a to 6 are explanatory diagrams of a tape cassette for explaining the tape cassette position regulating mechanism according to the present invention, and FIGS. 7 to 10 are explanatory diagrams of an adapter that accommodates the tape cassette. A... Small cassette, B... Adapter, 1... Upper half, 2... Lower half, 28, 29, 30, 31... Recess, 32... Hole, 34, 35... Notch, 51... Lower half, 52... Upper half, 54, 55, 56, 57
... Convex portion, 58... Pin, 62, 63... Wall.

Claims (1)

[Claims for Utility Model Registration] A tape cassette is provided with a plurality of concave or convex portions on the ridgeline portions of the bottom and side surfaces, and when the tape cassette is stored in the tape cassette storage body, the concave or convex portions of the tape cassette are A convex or concave portion is integrally provided in the tape cassette storage body at a position corresponding to the convex portion, and by abutting these concave and convex portions, the position of the tape cassette within the tape cassette storage body can be regulated. Features a tape cassette position regulating device. In the tape cassette position regulating mechanism described in claim 1 of the utility model registration, the tape cassette storage body has approximately the same external shape as a standard type tape cassette, which is larger than the tape cassette,
When the tape cassette is stored, the bottom of the tape cassette and the bottom of the tape cassette storage body are on substantially the same plane. In the tape cassette position regulating mechanism according to claim 1 of the utility model registration, the upper end of the tape cassette is provided with a recess, and the tape cassette storage body is provided with a protrusion at a position corresponding to the recess, and the tape cassette is further provided with a convex portion at a position corresponding to the recess. The upper part of the tape cassette and the upper part of the tape cassette housing are located on almost the same plane when the cassette is stored in the tape cassette housing. Utility Model Registration Claim 1. The tape cassette position regulating mechanism according to claim 1, wherein the reel brake in the tape cassette is released by a pin of a tape cassette storage body inserted into a hole in the tape cassette.