JPS638547B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette adapter used when, for example, a tape cassette smaller than a standard type is installed in a standard type recording/reproducing machine, and the present invention relates to a tape cassette adapter that is used when a tape cassette smaller than a standard type is installed in a standard type recording/reproducing machine. By providing a tape pull-out member for pulling out the tape from the tape to form a predetermined tape path, and providing a locking means for locking the tape pull-out member in a predetermined position when the tape path is being formed, the tape pull-out member can be pulled out in a predetermined tape pass formation state. Even if tension is applied to the tape, the tape path will not change, so even if it is installed in a recording/playback machine, the capstan, pinch rollers, etc. of the record/playback machine will collide with the tape and damage the tape, or the recording/playback operation will not be possible. To provide a tape cassette adapter that never runs out.

If you want to use a small tape cassette used in a recording/playback machine such as a video tape recorder in a recording/playback machine that is larger than this small tape cassette, for example, a standard type tape cassette, you must use a small tape cassette. You will need an adapter to convert it to a standard tape cassette. If the tape path of a small tape cassette is configured the same as that of a standard tape cassette, this adapter may simply serve as a housing. Even though it is small, it is not that small because the tape path is the same as that of a standard type tape cassette. Therefore, in order to make a small tape cassette substantially smaller, for example, the supply reel in the small tape cassette must be In order to make the distance from the take-up reel smaller than that of a standard type tape cassette, and to record and play back a small tape cassette configured in this way on a standard type recording/playback machine, an adapter can be used to connect the small tape cassette to the standard type. The tape path of the tape shall be adaptable to standard types of recording/playback equipment.

This application has been made in accordance with the above objectives,
Examples thereof will be described below.

Figure 1 is a perspective view of a tape cassette that is smaller than a standard tape cassette that is used, for example, in a standard recording/reproducing machine, with its front lid open, and Figure 2 is a perspective view of the upper half of this small cassette. FIG. 3 is a sectional view.

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 cover 3 for protecting the tape. It is rotatably attached to the upper part by a support shaft 4. One end of the sliding piece 7, which is held so as to be able to slide in the groove by being pressed by a substantially U-shaped spring 6 inserted into a groove 5 bored in the side surface of the upper half 1, is attached to the front cover 3. When the front cover 3 is in the closed state, the front cover 3 is maintained in that state, and when the front cover 3 is opened, the open state is maintained.

A supply reel 8 and a take-up reel 9 are arranged in the small cassette A, and the distance between the supply reel 8 and the take-up reel 9 is such that the distance between the supply reel 8 and the take-up reel 9 is a standard type that cannot be installed only in the small cassette A. The distance is shorter than the distance between the supply reel disk and the take-up reel disk of a recording/reproducing machine. or,
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, magnetic tape 1
0 is from the supply side reel 8 to the guide pole 11a,
12a, 12b, and 11b, and then wound onto the take-up reel 9. An uneven groove 14 is formed on the lower surface of the lower flange 13 of the supply reel 8, and an uneven groove that meshes with the uneven groove 14 is also formed at a predetermined position of the lower half 2 corresponding to the uneven groove 14 of the lower flange 13. 15 is formed, and the supply reel 8 is biased 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, and the supply reel 8 This prevents the magnetic tape wound on the supply reel 8 from loosening. When the small cassette A is installed in the recording and reproducing machine, the supply reel 8 is lifted by the supply reel disk 26 of the recording and reproducing machine by a specified amount toward the half 1 side against the repulsive force of the leaf spring 16. , the engagement between the uneven grooves 14 and 15 is released and rotation becomes possible. That is, a hole 17 for inserting the supply reel disk 26 of the recording/reproducing machine is formed in the lower half 2 at a position corresponding to the supply reel 8, and the supply reel disk 26 is inserted into the supply reel 8. Become so. The take-up reel 9 is inserted into a shaft 18 fixed to the lower half 2, and is rotatable about the shaft 18.

A brake mechanism is disposed on the take-up reel 9 so that the take-up reel 9 does not rotate when the small cassette A is not installed in the recording/reproducing machine. This brake mechanism consists of a brake 20 that presses the upper surface of the peripheral edge of the lower flange 19 of the take-up reel 9. This brake 20 is inserted into a shaft 21 formed integrally with the lower half 2, and is mounted on a spring. In operation, in the pressed state, the shoe portion 20a of the brake 20 comes into pressure contact with the surface of the lower flange 19, so that the take-up reel 9 does not rotate and the magnetic tape does not loosen. still,
When the small cassette A is attached to a recording/reproducing machine or an adapter to be described later, a force is applied that resists the repulsive force of the spring, the shoe portion 20a of the brake 20 is separated from the lower flange 19 surface, and the take-up reel 9 can rotate. It becomes like this. The rotation of the take-up reel 9 is different from that of the supply reel 8, and is carried out by a driving force transmission medium that meshes with teeth 22 formed on the peripheral side surface of the lower flange 19 of the take-up reel 9. . Therefore, a notch 23 is formed in the lower half 2 so that the driving force transmission medium can mesh with the teeth 22 when the small cassette A is attached to a recording/reproducing machine or an adapter described later.

FIGS. 4 and 5 are schematic illustrations of the tape cassette adapter.

In the figure, reference numeral B designates an adapter having an external shape that is approximately the same as that of a standard type tape cassette.This adapter B consists of a frame body consisting of a front lid 30, an upper half 31, and a lower half 32, and has a storage section for storing a small cassette A. A′ is constructed.

Reference numeral 33 denotes an operating lid that is provided on the back of the adapter B so that it can be opened and closed by a support shaft 34. When this operating lid 33 is opened, a sliding lever 35 that is slidably provided by a known means is opened. Move, pivot 3
Press one end of the L-shaped lever 37 provided around the lever 6 and rotate it clockwise to move the connector 38 connected to the other end. Since the projection provided on the support shaft 39 is connected, the front lid 30 is opened by the above operation.
In addition, 40 is a spring, and this spring 4
The L-shaped lever 37 is urged counterclockwise by the zero force, and the front cover 30 is maintained in the closed state unless the operation cover 33 is opened.

In addition, this adapter B is provided with a tape pull-out mechanism, that is, the front cover 3 of the small cassette A can be removed without pulling out the magnetic tape from the small cassette A.
Loading levers 41 and 42 will be located in the notch 24 of small cassette A when set in storage compartment A' in an open state, and guide rollers 43 provided at the tips of these loading levers 41 and 42. , 44, an operating lever 45 provided at a position where it can be operated when the operating lid 33 is opened, and when the operating lever 45 is moved from the solid line position to the two-dot chain line position in FIG. 5, the loading levers 41 and 42 move from the solid line position. The operating lever 45 serves as a driving force transmission medium section for rotating the magnetic tape in the small cassette A to the position indicated by the two-dot chain line and pulling it out by the guide rollers 43 and 44 to form a predetermined tape path.
Connectors 46, 47 connected to connector 4
L-shaped lever 48 connected to L-shaped lever 6, lever 49 connected to L-shaped lever 48, lever 50 connected to lever 49, rotating body 51 provided integrally with lever 50, and integrated with loading lever 41. The rotating body 52 provided in the rotating body 51 and the rotating body 52
A rotating lever 54 connected to the connector 47 and the loading lever 42
The tape pull-out mechanism is constructed by the following. and,
When the operating lever 45 is rotated from the solid line position in FIG. As the loading lever 42 rotates, the loading lever 42 moves from the solid line position to the two-dot chain line position, the magnetic tape is pulled out from the small cassette by the guide roller 44, and the connector 46 is pulled out.
The L-shaped lever 48 rotates clockwise about the support shaft via the L-shaped lever 48, moving the lever 49, and the rotating body 51 rotates clockwise via the lever 50. As a result, the belt 53 is rotated. Then, the loading lever 41 is rotated clockwise from the solid line position to the two-dot chain line position, and the magnetic tape is also pulled out from the small cassette by the guide roller 43.
Guide rollers 43 and 44 form a tape path that is substantially the same as that of a standard type tape cassette. Furthermore, as mentioned above,
When operating the operating lever 45, the operating lid 3
3 is in the open state, so the front cover 3 of adapter B
0 is open, and the loading lever 41 never collides with the front cover 30 when forming a tape path.

Reference numeral 55 denotes a connector lock member, which prevents the operation lever 45 from being operated when the small cassette A is not stored in the storage section A'. This connector lock member 55 is configured in an L-shape, and one end 56 side thereof is formed into a tapered shape, and this one end 56 side is made to protrude into the storage section A', so that the small cassette A can be inserted into the connector lock member 55. When the small cassette A is stored in the storage section A', the small cassette A comes into contact with the tapered part of the connector lock member 55 and presses the tapered part side, so that the connector lock member 55 moves around the support shaft as shown in FIG. Spring 5 biased counterclockwise
7 in the clockwise direction, the engagement between the other end 58 of the connector lock member 55 and the concave portion of the connector 47 is released, and the operating lever 45 can be driven. Note that when taking out small cassette A from adapter B, the operating lever 4
5 has been returned from the two-dot chain line position to the solid line position, the connector lock member 55 is returned by the force of the spring 57, and the other end 58 of the connector lock member 55 and the connector 47 are engaged. And it's starting to lock up.

59 is a protrusion to prevent incorrect insertion when attaching adapter B to a recording/reproducing device;
When the operating lever 45 is driven from the solid line position to the two-dot chain line position in FIG. When a predetermined tape path is not formed, it protrudes from the outer wall surface of the adapter B, and is attached to the rotating arm 60 of the loading lever 42, for example. .

Reference numeral 61 denotes a locking member for the guide roller 43 of the loading lever 41. When the operating lid 33 is opened, the locking member 61 escapes from the locked position relative to the guide roller 43, and in this state, the operating lever 45 is locked. When the operation lid 33 is closed after pulling out the magnetic tape from the small cassette A and forming a predetermined tape path by operating the
The lock member 61 returns to its original position, locks the guide roller 43, and prevents the guide roller 43 from wobbling. That is, the operation lid 33
An L-shaped lever 63 is provided corresponding to the protrusion 62 , and when the operation lid 33 is opened, one end side of the L-shaped lever 63 is pressed and the L-shaped lever 6 is pressed.
3 rotates clockwise, the connector 64 connected to the other end of the L-shaped lever 63 moves, and the L-shaped lever 65 connected to the other end of the connector 64 moves.
rotates clockwise, and the L-shaped lever rotates clockwise.
The connector 66 connected to the other end of the connector 65 moves, and the locking member 61 connected to the connector 66 is rotated counterclockwise around the support shaft and moved away from the locking position of the guide roller 43. , so as not to interfere with the rotation of the loading lever. Then, when the loading lever 41 is rotated by operating the operating lever 45 and the guide roller 43 pulls out the tape from the small cassette A to form a predetermined tape path, the operating lid 33 is closed. Since the restriction on the L-shaped lever 63 by the protrusion 62 of the lid 33 is released, the lock member 61 is rotated clockwise by the force of the spring 67 that urges the lock member 61 to rotate clockwise. The guide roller 43 is rotated in the direction and engaged with the guide roller 43, thereby locking the guide roller 43 in a predetermined position. Note that 68 is a pin, which is used to position the guide roller 43 at a predetermined position by the locking member 61.

Note that the locking member 61 is attached to an upper position near the ceiling on the upper half 31 side of the adapter B. This is because if the lock member 61 is installed at a low position on the lower half 32 side, this corresponds to the position of the hole 69 into which the capstan, pinch roller, etc. will enter when the adapter B is installed in the recording/reproducing machine. This is to prevent the capstan, pinch roller, etc. from colliding with the lock member 61, which would prevent the capstan, pinch roller, etc. from entering.

Further, since the distal end of the locking member 61 is formed into a tapered shape, for example, the locking member 61 does not move to the set unlocked position depending on the operating state of the operation lid 33, and its movement position is fixed. Even if the tip of the guide roller 43 is located on the moving path of the guide roller 43 and the guide roller 43 comes into contact with the lock member 61 when the loading lever 41 rotates, the loading lever 41 cannot be driven. Due to the force, the guide roller 43 rides up the locking member 61 by the action of the tapered tip of the locking member 61, and at the same time, the locking member 61
The locking member 61 is rotated counterclockwise against the force of the spring 67, thereby ensuring the locking function of the locking member 61. For example, lock member 6
1 is not displaced by the operation of the operation lid 33, when the guide roller 43 comes into contact with the lock member 61 due to the operation of the operation lever 45, the lock member 61 is moved by the pressing force of the guide roller 43. After the guide roller 43 is rotated counterclockwise and rotated to a predetermined position, it is returned by the force of the spring 67 and the guide roller 43 is locked.

For example, even if the locking member 61 is in the position shown by the solid line in FIG. When the locking member 61 reaches the chain line position, the locking member 61 returns to its original position due to the force of the spring 67, and the locking member 61 is applied to the guide roller 43.

Note that the locking member 61 for the guide roller 43
The locking operation is performed by the force of the spring 67 when the operation lid 33 is closed, but the spring 67 is not provided and the operation lid 33 and L
It is also possible to directly connect the lever 63 so that the operation of the locking member 61 and the operation of the operating lid 33 are linked.

Reference numeral 70 denotes a generally L-shaped small cassette locking member that rotates in accordance with the movement of the connector 47. After storing the small cassette A in the storage section A', this locking member 70 is used to move the operation lever 45 to the fifth position. When driven from the solid line position to the two-dot chain line position in the figure, the connector 47
When the tape is pulled out from the small cassette A to form a predetermined tape path, one end of the locking member 70 fits into the recess on the back of the small cassette A. This prevents it from being removed from adapter B.

The loading lever 41 is operated by operating the operating lever 45, and this operation is as follows.
This is done via rotating bodies 51, 52 and a belt 53. The method of attaching the belt 53 to the rotating body is as shown in FIG. By providing a concave portion 74 in which the spherical portion 73 fits (same as 52), attachment of the belt 53 to the rotating bodies 51, 52 becomes extremely simple, and the rotational force of the rotating body 51 is transferred to the rotating body. 52. Note that the spherical portion 73 forming a part of the belt 53 is not limited to a spherical shape, and may be angular.

Note that the belt 53 and the rotating bodies 51 and 52 are engaged by the spherical part 73 of the belt 53 and the recessed part 74 of the rotating body.
It is necessary to prevent this fitted state from coming off easily.Depending on the shape of this fitted part, for example, as shown in Fig. 8, The clamping piece 7 corresponds to the position of the recess 74.
5 is provided, and the spherical part 73 is held by the clamping piece 75.
You may also make sure that it does not come off.

When the small cassette A is installed in the storage part A' of the adapter B, the brake shoe 20a, which is a brake mechanism for the take-up reel 9 of the small cassette A, is activated by the pin provided in the storage part A' of the adapter B. A force is applied to resist the repulsive force of the spring, and the take-up reel 9 becomes rotatable. However, if the small cassette A is stored in adapter B and adapter B is used twice, the take-up reel 9 becomes rotatable. When the side reel 9 rotates, the magnetic tape wound on the take-up reel 9 may become slack. Therefore, when the small cassette A is stored in the adapter B, even if the direct braking function for the take-up reel 9 is released, the braking function for the take-up reel 9 is applied by other means. It is preferable to leave it as is. Incidentally, since the brake function of the supply reel 8 is not released unless it is attached to a recording/reproducing machine, such a means is not necessary.

The indirect braking mechanism for the take-up reel 9 is, for example, a gear that meshes with the teeth 22 exposed from the notch 23 of the small cassette A when the small cassette A is stored in the storage section A' of the adapter B. 76, a gear 77 that is provided coaxially with this gear 76 and rotates; a gear 78 that meshes with the gear 77 and rotates by the driving force of the take-up side reel disk of the recording/reproducing machine; and a gear 78 that meshes with this gear 78; a gear 79 that rotates coaxially with the gear 79; a gear 80 that rotates coaxially with the gear 79; a gear 81 that meshes with the gear 80; a gear 82 that meshes with the gear 81; a gear 83 that rotates coaxially with the gear 82; Gear 84 meshing with gear 8
For gear 85 which is provided coaxially with 4 and rotates,
At least some of these are provided with braking means. That is, as shown in detail in FIG. 9, a brake lever 87 is provided that is biased clockwise by the force of a spring 86 around a support shaft, and the distal end shoe portion 87a of this brake lever 87 is Gears 84, 8 rotating counterclockwise
Since it is designed to be in pressure contact with the axis of 5,
The rotational fluctuations of the gears 84 and 85 are eliminated, and even if the direct braking function for the take-up reel 9 is released due to the restriction by the shoe part 87a, the take-up reel 9 will fluctuate and the winding on the take-up reel 9 will be prevented. When the tape is loosened, the scratches disappear. especially,
This brake shoe portion 87a is connected to the gears 84, 85.
The brake is applied only when the shaft to which the gears 84 and 85 are attached rotates counterclockwise, and the brake is applied only when the shaft to which the gears 84 and 85 are attached rotates clockwise. It is constructed in such a way that it does not work. That is, this brake means is configured to only prevent the tape wound on the take-up reel 9 from wobbling in the direction of loosening. Therefore, in order to take out the small cassette A from the adapter B, the gear 85 is required to rewind the tape formed over the portion of the adapter B into the small cassette A.
It is only necessary to rotate the operation lever 45 so as to engage with the gear 85 and drive the gear 85 clockwise, and the brake shoe portion 87a does not become an obstacle to such operation. In addition, since the force of the spring 86 is not large but moderate, the force of the spring 86 is
The pressing force of the brake shoe part 87a due to the force is not large but is moderate, so that the tape wound on the take-up reel 9 can be prevented from loosening, and the operation lever 45 can be moved to the second position. A predetermined tape path can be formed by driving from the solid line position in FIG. 5 to the two-dot chain line position. This means that when the operating lever 45 is driven from the solid line position in FIG. The tape path forming operation is not rapid, and therefore the tape is pulled out more than necessary, causing damage to the tape and making it unusable.

The take-up reel 9 due to this brake lever 87
To release the indirect brake function, when the adapter B with the small cassette A attached is attached to the recording/reproducing device, the pin 88 provided on the recording/reproducing device enters into the adapter B, and the tapered part of the brake lever 87 is pressed, the brake lever 87 is rotated counterclockwise against the repulsive force of the spring 86, and the brake by the brake shoe part 87a is released.
The winding reel 9 is wound up on the winding reel 9 and travels.

The shaft that the brake shoe portion 87a presses against is
In the above description, the shaft to which the gears 84 and 85 are attached was explained, but it may be a shaft to which the gears 82 and 83 are attached, for example. In such a case, as shown in FIG. 10, the brake lever is divided into parts 87' and 87'', and the brake lever 87' is constructed in the same way as the brake lever 87 except for the shoe part. Brake lever 87'
The brake lever 87'' is rotated around the shaft on which the gears 84 and 85 are attached by the rotation of the gears 82 and 83. The brake may be applied to the attached shaft, and the same effect can be obtained. However, even in such a case, the brake shoe portion 87b may be configured so that the brake is applied when the take-up reel 9 swings in the direction in which the tape wound on the take-up reel 9 loosens. It is essential.

Comparing the brake mechanisms shown in Figures 9 and 10, when drawing out the tape from a small cassette to form a predetermined tape path, if the tape tension is strong, the friction clutch (which applies the brake force) There is a risk that the gears (composed between gears 82 and 83) may operate and spin idly, and brake force may not be applied to the take-up reel. 1
The configuration shown in Figure 0 is more preferable.

The take-up reel 9 is driven by the gear 7 that meshes with teeth 22 formed on the peripheral side surface of the lower flange 19 of the take-up reel 9.
6. A series of gears 7 that rotate in conjunction with this gear.
7, 78, 79, 80, 81, 82, 83, 8
This is done by driving the gears 4 and 85, and the gear portion 8 of the operating lever 45 is connected to the gear 85.
When 9 are engaged, a series of gears are rotated. In particular, when the operating lever 45 is rotated from the solid line position in FIG. 5 to the two-dot chain line position, the gear portion 89 of the operating lever 45
Since the gear 85 and the take-up reel 9 are in mesh with each other, the take-up reel 9
The rotational force is transmitted to the position indicated by the two-dot chain line (in this state, a predetermined tape path is formed by the rotational movement of the loading levers 41 and 42).
The gear portion 8 is configured on the operation lever 45 so that the gear portion 89 and the gear 85 are disengaged from each other.
9 is formed into a fan shape, for example. Therefore,
After the predetermined tape path is formed, the gear portion 89 and the gear 85 are disengaged, so the small cassette A is stored and the adapter B, on which the predetermined tape path is formed, is inserted into the recording/reproducing machine. Even if the recording/reproducing device is put into operation, the driving force from the reel disk on the take-up side of the recording/reproducing device will not be transmitted to the operating lever 45.

Recesses 90 and 91 are formed at predetermined positions in the portion of the operating lever 45 where the gear portion 89 is not formed, and an engaging member 93 having a roller 92 at its tip is provided corresponding to these recesses. It is being That is, when the operating lever 45 is placed in the state shown by the solid line in FIG.
The roller 92 of the engaging member 93, which is biased clockwise around the support shaft by the force of 4, fits into the recess 90, restricts the operating lever 45 to that position, and shifts the gear of the operating lever 45. This prevents the gear 85 from disengaging from the portion 89, and is biased clockwise by the force of the spring 94 when the operating lever 45 is in the two-dot chain line position in FIG. The roller 92 of the engagement member 93 fits into the recess 91,
The operating lever 45 is regulated at that position, and the gear portion 89 of the operating lever 45 and the gear 85 are maintained out of mesh. Therefore, even if some impact force is applied to the adapter, the operating lever 45 will not move unnecessarily due to the rollers and recesses of the engaging member 93, and the rotation operation of the operating lever 45 will be moderated. It becomes something that can be given. Note that when the operating lever 45 is in the position shown by the two-dot chain line in FIG. Even if the operating lever 45 comes off, there is no possibility that the operating lever 45 will come off as the gear portion 89 of the operating lever 45 and the gear 85 will mesh with each other due to the operating lid 33.

Note that the moderation mechanism for the operating lever 45 is not limited to the above-mentioned configuration, and does not include the engaging member 93, the roller 92, and the recesses 90, 91, but may include, for example, a recess 95 formed at a predetermined position of the operating lever 45,
For this recess 95, a resilient moderation member is provided, for example, on the ceiling of the upper half of the adapter in accordance with the position of the solid line in FIG. When the operating lever 45 is at the solid line position in FIG. 5, the moderation member corresponding to this position fits into the recess 92 to regulate the position of the operating lever 45, and when the operating lever 45 is at the two-dot chain line position in FIG. In some cases, a moderation member corresponding to this position may be configured to fit into the recess 95 to regulate the position of the operating lever 45.

The gear portion 89 of the operating lever 45 and the gear 85 are
Since the meshing state may become disengaged, that is, after operating the operating lever 45 to pull out the tape from the small cassette A and forming a predetermined tape path, the gear portion 89 and the gear 8
For example, when the operating lever is driven from the two-dot chain line position to the solid line position in FIG. 5 after recording/reproducing operation, the gear portion 89 and the gear 85 come to mesh with each other. At the start of this gear meshing, if the teeth of the gear portion 89 and the gear 85 are normal, for example, simply trapezoidal, there is a possibility that the meshing of the gear portion 89 and the gear 85 will not proceed smoothly. For example, as shown in FIG. 11, the shape of the teeth of the gear 85 is changed from a trapezoidal shape,
By forming the tips of the teeth into a tapered shape, the teeth of the gear portion 89 can smoothly mesh with the gear 85, and when the operating lever 45 is rotated counterclockwise, the gear portion 89 and the gear 85 are connected. The two reliably engage with each other, allowing the take-up reel 9 to rotate smoothly in the tape winding direction.

A one-way clutch is interposed between the gears 84 and 85, and the driving force is transmitted in the tape winding direction, and the force in the winding direction is transmitted to the winding reel 9, and vice versa. Depending on the direction of rotation, the take-up reel is not directly driven.

Also, in order to rewind the tape into the small cassette A from a state where a predetermined tape path has been formed,
The operation lever 45 may be rotated counterclockwise to apply a driving force in the winding direction to the winding reel 9, but in this case, the winding diameter of the winding reel (i.e., the The winding diameter varies depending on how much tape is wound on the side reel 9).The extent to which the operating lever 45 must be rotated to completely cover the tape in the tape path formed outside the small cassette A. The difference is how it winds up. In other words, when winding a certain length of tape, if a long tape is already wound on the take-up reel 9, the take-up reel 9 has a long winding diameter.
The rotation angle of the take-up reel 9 may be small; in a state where no tape is wound on the take-up reel 9, the rotation angle of the take-up reel 9 must be large because the take-up diameter is short.

Therefore, in this adapter, in consideration of the above, in the correlation between the rotation angle of the operating lever 45 and the take-up diameter of the take-up reel 9, the operating lever 4
5 must be rotated to the maximum extent (5th
(When rotating from the two-dot chain line position to the solid line position in the figure)
For example, if the operating lever 45 is rotated to the Z position, the tape will be completely wound up on the take-up reel 9. In this case, even if the operating lever 45 is further rotated to the X and Y positions,
In order to prevent damage if the tape is forcibly stretched, the gears 82 and 83 are of a friction clutch structure, and the operating lever 45 is configured to rotate idly before the tape is forcibly stretched. The rotation from the X to the Y position is designed to allow extra winding in case of unexpected tape slack.

If the locking member 61 for the guide roller 43 is not provided, the tape is pulled out from the small cassette and a predetermined tape path is formed, then this adapter is attached to the recording/playback machine and the tape is inserted into the recording/playback machine. When the loading motor is driven, the guide roller is pulled and displaced by the tape running tension at the start of the drive, and the guide roller is pulled by the inertia when the reel disk stops at the unloading end position. As a result, the guide roller may collide with the capstan or pinch roller of the recording/reproducing machine, and the tape may be damaged by the force when the displaced guide roller returns to its original position due to the elastic force of the belt 53, for example. Also, if the guide roller stops at a halfway position for some reason, the front cover 30 of the adapter will not close, and in the case of a front loading type recording/reproducing machine, the front cover 30 will become a switch member. However, by providing the locking member 61, such disadvantages can be eliminated.

As mentioned above, the tape cassette adapter according to the present invention is an adapter used when a tape cassette smaller than a standard type tape cassette is attached to a standard type recording or reproducing machine, and is used in a storage section of the adapter. A tape drawing member is provided for drawing out the tape from a small tape cassette attached to the tape to form a predetermined tape path. Since a movable rotary locking means is provided to lock in a predetermined position, even if an external force is applied to the small tape cassette device adapter, the tape path will not be distorted, and the tape will not be damaged. The tape path can be formed without causing recording/reproduction to become impossible, and by moving the locking means from the locked position to the unlocked position by opening the opening/closing cover for the operating member of the tape drawer member. The locking mechanism can be moved smoothly from the non-locking position to the locking position by closing the opening/closing cover relative to the operating member of the tape pull-out member, so that the locking mechanism can be reliably locked. It has the following characteristics.

[Brief explanation of the drawing]

Figures 1 to 3 are explanatory diagrams of small cassettes, Figure 4
5 and 5 are schematic explanatory views of an embodiment of the tape cassette adapter according to the present invention, and FIGS. 6 to 12 are partial explanatory views. A...Small cassette, B...Adapter, A'...Storage compartment, 33...Operation lid, 41...Lodein lever,
43...Guide roller, 45...Operation lever, 61...
Lock member, 68...pin.

Claims (1)

[Scope of Claims] 1. An adapter used when a tape cassette smaller than a standard type tape cassette is attached to a standard type recording or reproducing machine, the small tape cassette being attached to a storage section of the adapter. a tape pull-out member that pulls out the tape to form a predetermined tape path, and in a state in which the tape pull-out member forms a predetermined tape path, the tape pull-out member is locked in a predetermined position via an elastic means; An adapter for a tape cassette, characterized in that it is provided with a rotatable locking means. 2 An adapter used when a tape cassette smaller than a standard type tape cassette is used by attaching it to a standard type recording or reproducing machine, which allows the tape to be pulled out from the small tape cassette attached to the storage section of the adapter and placed in a specified position. a tape pull-out mechanism for forming a tape path, and a displaceable rotatable locking means for locking the tape pull-out member of the tape pull-out mechanism in a predetermined position via an elastic means in a predetermined tape path forming state; 1. A tape cassette adapter characterized in that the locking means is configured to be rotationally displaced from a locked position to an unlocked position by opening an opening/closing lid for an operating member of a tape drawer mechanism. 3 An adapter used when a tape cassette smaller than a standard type tape cassette is used by attaching it to a standard type recording or playback machine, which allows the tape to be pulled out from the small tape cassette attached to the storage section of the adapter and placed in a specified position. a tape pull-out mechanism for forming a tape path, and a displaceable rotatable locking means for locking the tape pull-out member of the tape pull-out mechanism in a predetermined position via an elastic means in a predetermined tape path forming state; 1. An adapter for a tape cassette, characterized in that the locking means is configured to be rotationally displaced from a non-locking position to a locking position by closing an opening/closing lid for an operating member of a tape draw-out mechanism.