JPS598174A - Adapter for tape cassette - Google Patents

Abstract

PURPOSE:To make a tape feeding means simple-constitution and ensure the tape feeding operation, by using a mechanism where a rotary material is connected to the tape feeding means. CONSTITUTION:A rugged groove 14 is formed on the lower face of a lower flange 13 of a supply reel 8, and a rugged groove 15 to be engaged with the rugged groove 14 is formed in a prescribed position of a lower half 2 corresponding to that position of the rugged groove 14 of the lower flange 13. The supply reel 8 is charged to the side of the lower half 2 by the action of a flat spring 16 of an upper half 1, and rugged grooves 14 and 15 are engaged with each other to fix the supply reel 8, and loosening of a magnetic tape wound around the supply reel 8 is prevented. When a small-sized cassette A is set to a recorder and reproducer, the supply reel 8 is lifted to the side of the half 1 by a prescribed quantity against the repulsive force of the flat spring 16 by a supply reel disc 26 of the recorder and reproducer, and rugged grooves 14 and 15 are disengaged from each other, and the supply reel 8 can be turned.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette adapter used, for example, when installing a tape cassette smaller than a standard type into a standard type recording/reproducing machine. By using a mechanism in which a rotating body is connected to the tape feeding means that is similar to the tape path of a tape cassette, and by providing a means for biasing this rotating body in a predetermined direction, the tape feeding means can be extremely simplified. It is an object of the present invention to provide a tape cassette adapter which can have a simple configuration and ensure a reliable tape feeding operation.

If you want to use a small tape cassette used in a recording/playback device such as a video tape recorder in a recording/playback device that is larger than this small tape cassette, for example, a standard type tape cassette, you need to use a small tape cassette. You will need an adapter to convert it to a standard tape cassette. This adapter may simply serve as a housing if the tape path of the small tape cassette is configured the same as that of a standard tape cassette; Although it is small, it is not that small because it is the same as the tape path of a standard type tape cassette. Therefore, in order to make a small tape cassette substantially smaller, for example, the supply side IJ in the small tape cassette must be The distance between the reel and take-up reel is smaller than that of the standard type, and in order to record and play back a small tape cassette configured in this way with a standard type recording/playback machine, an adapter can be used to connect the small tape cassette to the take-up reel. The tape path must be changeable to accommodate standard types of recording/playback equipment.

The present application has been made in accordance with the above object, and examples thereof will be described below.

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

In the figure, A is a small cassette, and this small cassette A
The frame body is rotatably attached to the upper half 1, the lower half 2, and the upper front side surface of the upper half 1 by means of 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 lid 3 is in the closed state, the front lid 3 is maintained in that state, and when the front lid 3 is opened, the open state is maintained.

Inside the small drawer A, there are a supply reel 8 and a take-up reel 9.
The distance between the supply reel 8 and the take-up reel 9 is equal to the distance between the supply reel disk and the take-up reel disk of a standard type recording/reproducing machine that cannot be installed only with this small cassette A. The distance between the Further, the magnetic tape 10 is arranged such 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 moved from the supply reel 8 to the guide poles lla, 12a,
After passing through steps 12'b and llb, it is wound onto the take-up reel 9.

An uneven groove 14 is formed on the lower surface of the flange 13 of the supply reel 8.
is formed, and the uneven groove 1 of this lower flange 13 is formed.
A groove 15 that engages with the groove 14 is also formed at a predetermined position of the lower half 2 corresponding to the groove 4, and the supply reel 8 is moved toward the lower half 2 by the action of a leaf spring 16 attached to the upper half 1. The uneven grooves 14 and 15 engage with each other, and the supply reel 8 is fixed, thereby preventing the magnetic tape wound on the supply reel 8 from loosening. When the small cassette A is installed in the recording/playback machine, the supply reel 8
is lifted by the supply side reel disk 26 of the recording/reproducing machine by a specified amount toward the half 1 side against the repulsive force of the plate spring 16, and the engagement between the uneven grooves 14 and 15 is released so that it can rotate. Become. 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 can rotate about the shaft 18.

A brake mechanism is disposed on the take-up reel 9 so that the take-up IJ-reel 9 does not rotate when the small force cera) A is not attached to the recording/reproducing machine. This brake mechanism consists of a brake 2° that presses the upper surface of the peripheral edge of the lower flange 19 of the take-up reel 9.
is inserted into a shaft 21 formed integrally with the lower half 2, and when pressed and biased by the action of a spring, the shoe portion 20a of the brake 20 comes into pressure contact with the lower flange 19, causing the winding to take place. The side reel 9 does not rotate so that the magnetic tape does not loosen. When the small horn set A is attached to a recording/reproducing machine or an adapter described below, a force is applied to resist the repulsive force of the spring ring, and the shoe part 20a of the brake 20 is separated from the lower fludge 19 surface, and the winding side reel 9 will be able to rotate. The rotation of the take-up reel 9 is different from that of the supply reel 8, and is rotated by fE2 formed on the circumferential surface of the lower flange 19 of the take-up reel 9.
This is done by means of a driving force transmission medium meshing with 2. Therefore, a notch 23 is formed in the lower half 2 so that a driving force transmission medium can mesh with the teeth 22 when the small kachinatsu (.8) is attached to a recording/reproducing device or an adapter described below.

4 and 5 are schematic explanatory diagrams of the tape cassette adapter.

In the figure, B is an adapter with an external shape that is approximately the same as that of a standard type tape cassette, and this adapter B consists of a frame body consisting of a front lid 30, an upper half 31, and a lower half 32, and is a storage space for storing a small cassette A. A section A' is constructed.

Reference numeral 33 denotes an operating lid that is provided on the back of the adapter B so as to be openable and closable from a support shaft 34vC. When this operating lid 33 is opened, a sliding lever 35 that is slidably provided by a known means is opened. move, press one end of the L-shaped lever 37 provided around the support shaft 36, and rotate it clockwise.
The connector 38 connected to the other end is moved, and the tip of the connector 38 is connected to the protrusion provided on the support shaft 39 of the front cover 30, so the front cover 30 is opened by the above operation. It has become so. 40 is a spring, and the force of this spring 40 causes L
The letter-shaped lever 37 is biased counterclockwise so that the front cover 30 remains closed unless the operation cover 33 is opened.

In addition, this adapter B is equipped with a tape pull-out mechanism.In other words, when the small cassette A is set in the storage compartment A' with the front lid 3 of the small cassette A opened, the small cassette can be easily pulled out without pulling out the magnetic tape from the small cassette A. Loading lever 41.42 located in the notch 24 of A), guide rollers 43.44 provided at the tips of loading levers 41 and 42 of A, and a position where it can be operated when the operation lid 33 is opened. The operating lever 45 provided on the operating lever 45
When the loading levers 41 and 42 are driven from the solid line position in FIG. 5 to the two-dot chain line position, the loading levers 41 and 42 are rotated from the solid line position to the two-dot chain line position. In order for the magnetic tape A to be pulled out by the guide rollers 43 and 44 to form a predetermined tape path, a magnetic tape is attached to the axis of the operating lever 45 as a driving force transmission medium for the loading lever 41. A rotatably attached gear 46, a pin 47 implanted in the operating lever, and a recess 48 of the gear 46 that the pin 47 locks into.
, a gear 49 that meshes with the gear 46, and a gear 5 that meshes with this gear 49 and is attached to the rotating shaft of the loading lever 41 in order to rotationally move the rope inodareper 41.
0, one end is attached to the gear 49 in order to bias the rotation of the gear 49 in a predetermined direction, and the other end is attached to a gear 82 or 83 described later.
A torsion coil spring 51 is rotatably attached to the shaft of
, a pin 5 regulating the rotation angle of the loading lever 41
2.52', and a connector 53 attached to the pin 47 as a driving force transmission medium for the loading lever 42.
, a rotary lever 54 connected to a connector 53 and a loading lever 42.

When the operating lever 45 is rotated from the solid line position in FIG. 5 to the two-dot chain line position, the connector 53 moves.
The loading lever 42 is rotated by the rotation of the rotation lever 54.
moves from the solid line position to the two-dot chain line position (7, the magnetic tape is pulled out from the small cassette by the guide roller 44, and the operation lever 45) rotates to move the pinot 47 and the recess 4.
8, the gear 46 also rotates in the same direction in conjunction with this, and therefore the gear 49 meshing with the gear 46 rotates counterclockwise, and the gear 50 also rotates in the clockwise direction. As the loading lever 41 rotates in the direction indicated by the solid line, the loading lever 41 moves from the solid line position to the two-dot chain line position and stops when it hits the pin 52', and the magnetic tape is pulled out from the small cassette by the guide roller 43, following the tape path of a standard type tape cassette. A tape path approximately similar to that is formed. As mentioned above, when the operation lever 45 is operated, the operation cover 33tri is in the open state, so the front cover 3o of the adapter B is open, and when the tape path is formed, the loading lever 41 is opened. There is no such thing as colliding with 30.

The driving force transmission mechanism of this loading lever 41 is connected to a guide roller 43 as shown in detail in FIGS. 6 and 7.
However, the operation lever 45 is set so that it can close the operation lid 33 in the positions before and after the tape is pulled out.In other words, the operation lever 45 is set to be able to close the operation lid 33 in the positions before and after the tape is pulled out. In order to avoid the inconvenience that the tip of the pin 45 is locked to the operating lid 33 and the operating M33 cannot be closed, the locking between the pin 47 and the recess 48 is configured to have some play. That is, it is designed so that the operating lever 45 can be moved to some extent, so that even if inaccurate movement occurs, the operating lever 45 can be rotated to the inside of the operating lid 33.

Furthermore, the I-silicoil spring 51 is attached by having one end thereof locked in the hole of the gear 49, but the attachment position is such that the tape is not pulled out by the guide roller 43. In other words, in the state shown in FIG. 6, is an imaginary line connecting the axial center point of the gears 82 and 83, which are removed from the other end of the torsion coil spring 51, and the rotational center point of the gear 49. , and in the state after the tape is pulled out by the guide roller 43, that is, in the state shown in FIG. 7, it is above the imaginary line, With this configuration, in the state shown in FIG. 6, the bias force of the torsion coil spring applies a clockwise force to the gear 49, and the seventh force applies a counterclockwise force to the gear 49. Even if the stopping position of the operating lever 45 is slightly shifted due to the increased force, the loading lever 41 will not be stopped at a halfway position. In other words,
Silicoil Bi-51 can be used even when the meshing of each gear is not perfect and there is a loss in drive transmission force.
The spring force plays a role in compensating for this drive loss.

Further, the ratio of the spring force of the torsion coil-bye 51 in the tape pull-out direction and the tape storage direction is configured such that the ratio in the tape pull-out direction is equal to that of the spring force.

This is because the guide roller 43 is loosely regulated by the operating lid 33 when the operating lever 45 is in the closed state, and the I-siri coil spring 51 prevents the guide roller 43 from fluctuating within this loosely regulated range. Because it is. To adjust the spring force ratio, for example, as shown in FIG. 6, while keeping the positions of the guide roller 43 and the operating lever 45 in the state before the tape is drawn out, the gears are disengaged, and the bias and force in the tape drawing direction are adjusted. When trying to pull the tape out, rotate the gear 49 clockwise to position 1, where the gear 49 and the coil bye 51 are locked, and conversely apply the bye force in the tape pulling direction. If you wish to make the adjustment smaller, you can do so by shifting the gear 49 counterclockwise from the position shown in Fig. 6, and then meshing the gears after adjusting in this way.This is an extremely simple adjustment process. It becomes something that can be done.

Furthermore, even if an unexpected situation occurs in which tension is applied to the tape and the loading lever 41 is rotated counterclockwise after the guide roller 43 has pulled out the tape, that is, in the state shown in FIG. 45 is regulated by the operating lid 33 in the closed state, and the loading lever 41id does not sway much.

Therefore, it is possible to prevent an accident in which the loading ball of the recording/reproducing machine or the Gear Pushbutton collide and damage each other when they enter in this state because the lobe innovator 41 is displaced from the predetermined position. Furthermore, there is no possibility of accidents such as crushing the tape when the front cover of the adapter is closed.

55 is a connector locking member, and when the small cassette A is not stored in the storage section A', the operation lever 45 is
This makes it impossible to operate.

This connector locking member 55 is configured in an L-shape, and one end 56 side thereof is formed in a tapered shape, and this one end 56 side is made to protrude into the storage part A', and the small connector lock member 55 is formed into a tapered shape. )A is stored in the storage section A', the small cassette A comes into contact with the tapered part of the connector locking member 55 and presses the tapered part, so that the connector locking member 55 is rotated around the support shaft. The connector locking member 55 is rotated clockwise against the force of the spring 57 which is biased counterclockwise in FIG.
The engagement state between the other end 58 and the recessed portion of the connector 53 is released, and the t1 operation lever 45 can now be driven. In the same manner, when the small sumo wrestler Tsu I-A is taken out from the adapter B, the operating lever 45 has been returned from the two-dot chain line position to the solid line position, so the connector locking member 55 is returned by the force of the spring 57. The other end 58 of the connector locking member 55 and the connector 53 are engaged,
It is now locked. Incidentally, it is more effective if such a locking mechanism is provided in the connector 35.

Reference numeral 59 denotes a protrusion to prevent incorrect insertion when attaching adapter B to a recording/reproducing device.
is driven from the solid line position in FIG. 5 to the two-dot chain line position, and the loading lever 41. ．． 42 is rotated from the solid line position to the two-dot chain line position, and when a predetermined tape path has been formed, it will retract from the outer wall surface of adapter B, and when a predetermined tape path has not been formed, it will retract from the outer wall surface of adapter B. It protrudes from the outer wall surface and is attached to, for example, the rotating arm 60 of the rope inodareper 42.

Reference numeral 61 denotes a small cassette locking member having a substantially rectangular shape that rotates in accordance with the movement of the connector 53. After storing the small cassette A in the storage section A', the locking member 61 is used to move the operation lever 45 to the fifth position. When the connector 53 is moved from the solid line position to the two-dot chain line position in the figure, one end of the locking member 61 is recessed into the recess on the back of the small cassette A, and the tape is removed from the small cassette L-A. This prevents the small force cera) A from being removed from the adapter B when it is pulled out to form a predetermined tape path.

When the small cassette A is installed in the storage section A' of the adapter B, the brake shoe 203, which is a brake mechanism for the take-up reel 9 of the small cassette A, is activated by the bottle provided in the storage section 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, when the small cassette A is stored in the adapter B and the adapter B is shaken, When the take-up 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,
It is preferable that the brake function is applied to the take-up reel 9 by other means. Visit,
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.

An indirect braking mechanism for the winding 11111J-le 9 is, for example, when the small cassette A is moved to the storage area A of the adapter B.
A gear 76 that meshes with the teeth 22 exposed from the notch 23 of the small cassette A when stored in the small cassette A;
A gear 77 that is provided coaxially with and rotates, a gear 78 that meshes with the gear 77 and rotates by the driving force of the reel disk on the winding side of the recording/reproducing machine, a gear 79 that meshes with this gear 78, a gear 79 A gear 80 that is provided coaxially with and rotates
, a gear 81 that meshes with the gear 80, a gear 82 that meshes with the gear 81, and a gear 83 that is provided coaxially with the gear 82 and rotates.
, a gear 84 that meshes with the gear 83, and a gear 85 that is provided coaxially with the gear 84 and rotates, at least a part of which is provided with a brake means. For example, this brake means is provided with a brake lever 87' which is biased clockwise by the force of a spring 86 around the support shaft of the operating lever.
Gear 84.8 is connected by a pin and a recess at the tip of the
A brake lever 87'' is biased counterclockwise around the axis of 5, and a tip portion 87a of this brake lever 87'' is connected to a gear 82°8 that rotates clockwise.
It is constructed so as to come into pressure contact with the axis of No. 3. Therefore, if the adapter is not attached to the recording/reproducing machine, the tip shoe part 87a is in pressure contact with the shaft of the gear 82, 83, and the direct braking function for the take-up reel 9 is canceled by this braking action. There is no possibility that the take-up reel 9 will fluctuate and the tape wound around the take-up reel 9 will become loose. Especially this brake brake part 87aid.

The brake is applied only when the shaft to which the gears 82 and 83 are attached rotates clockwise, and the gears 82 and 83 are removed when the shaft rotates counterclockwise. The brake is constructed such that the brake does not work when the vehicle is in use. 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, it is necessary to rewind the tape formed across the adapter B into the small cassette A.
If the operating lever 45 is rotated so as to engage with the gear 85 and drive the gear 85 clockwise, the brake shoe portion 87a will not become an obstacle to such an operation. Also, since the force of the spring 86 is not large but moderate, the brake brake part 87 due to the force of the spring 86
The pressing force a is not large, but is moderate, so it is possible to prevent the tape wound on the take-up reel 9 from loosening, and the operating lever 45 can be moved at two points from the solid line position in FIG. It is possible to form a predetermined tape or scrap by driving it to the position indicated by the chain line. This means that the operating lever 45 can be moved to the fifth position.
When driving from the solid line position to the two-dot chain line position in the figure to pull out the tape of small cassette A and form a predetermined tape groove, back tension is applied to the tape and the tape bus formation operation becomes abrupt. Therefore, the tape may be pulled out more than necessary, resulting in damage to the tape.

When the adapter B with pair A attached to the take-up reel 9 by this brake lever is attached to the recording/reproducing machine, the pin provided on the recording/reproducing machine enters the hole 88 of the adapter B.
By pressing the tapered part of the brake lever 87', the brake lever 87' is rotated counterclockwise against the repulsive force of the spring 86, and the brake by the brake/d part 87a is released. is wound onto the take-up reel 9 from the supply reel 8 and travels.

A one-way clutch is constructed between gears 82 and 83, but since a brake is applied before this clutch mechanism, the tape is pulled out from a small cassette to form a predetermined tape bus. In this case, there is no fear that if the tape tension is strong, the one-way clutch that applies the braking force will work and spin idly, and that the braking force will not be applied to the take-up reel.

The take-up reel 9 is driven by operating the operating lever 45.
A gear 76 that meshes with the teeth 22 formed on the peripheral side surface of the lower fledge 19 of the take-up reel 9, a series of gears 77 that rotate in conjunction with this gear, 78.79.80.81°8
2, 83, 84, and 85 are driven, and when the gear portion 89 of the operating lever 45 meshes with the gear 85, a series of gears are rotated. In particular, when the operating lever 45 is rotated from the solid line position in FIG. The rotational force is transmitted to the loading lever 9, but it reaches the position shown by the two-dot chain line (in this state, the loading lever 4
1.42 rotational movement to form a predetermined tape path) and the gear portion 89 configured in the operation/lever 45 so that the gear portion 89 and the gear 85 are disengaged from each other.
For example, it is formed into a fan shape. Therefore, after a predetermined tape path is formed, the gear portion 89 and the gear 85
Since the meshing state with the small sumo wrestler A is disengaged, even if the small sumo wrestler A is stored and the adapter B with the prescribed tape path is attached to the recording and reproducing machine and the recording and reproducing machine is activated, the recording and reproducing machine will not work. The driving force from the take-up side reel disk is not transmitted to the operating lever 45.

Four parts 90 and 91 are formed at predetermined positions in the part of the operating lever 45 where the gear part 89 is not formed.
An engaging member 93 having a roller 92 at its tip is provided corresponding to these recesses. That is, when the operating lever 45 is placed in the state shown by the solid line in FIG.
0, the operating lever 45 is restricted to that position, and the gear portion 89 of the operating lever 45 and the gear 85 are prevented from disengaging. When it is in the chain line position, the roller 92 of the retaining member 93, which is biased clockwise by the force of the spring 94, aligns with the recess 91 (IP)', and the operating lever 45 is moved to that position.
The gear portion 89 of the operation lever 45 and the gear 85
This maintains the disengagement. Therefore, even if some impact force is applied to the adapter, the operating lever 45 will not move unnecessarily due to the rollers and four parts of the engaging member 93, and the rotation operation of the operating lever 45 will be controlled. It becomes something that can be done. helmet, operation lever 45 is the fifth
In the case of the state shown by the double-dashed line in the figure, if the operating lid 33 is closed, even if the roller 92 of the retaining member 93 and the recess 91 are no longer aligned, the operating lever 45 There is no fear that the gear portion 89 of the operating lever 45 and the gear 85 will mesh with each other due to the operation lid 33.

However, the moderation mechanism for the operation lever 45 is not limited to the above configuration, but includes an engaging member 93, a roller 92, and a recessed portion 90°91.
Instead, for example, a recess 95 is formed at a predetermined position of the operating lever 45, and a resilient moderation member is attached to the ceiling of the upper half of the adapter, for example, to the recess 95. They are provided in accordance with the solid line position in FIG. 5 and the two-dot chain line position, and when the operating lever 45 is in the solid line position in FIG. 5, the moderation member corresponding to this position fits into the recess 95 and the operating lever 45 in position, and when the operating lever 45 is at the position indicated by the dotted chain line in FIG. There may be.

Since the gear portion 89 of the operating lever 45 and the gear 85 may become disengaged, it is necessary to operate the operating lever 45 to pull out the tape from the small cassette A and form a predetermined tape path. After that,
The gear portion 89 and the gear 85 are out of mesh. For example, when the operating lever is moved from the dotted chain line position to the solid line position in FIG. It becomes like this. 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. 8, by changing the shape of the teeth of the gear 85 from a trapezoidal shape and forming the tips of the teeth into a tapered shape, the teeth of the gear portion 89 can mesh smoothly with the gear 85. When the operating lever 45 is rotated counterclockwise, the gear portion 89 and the gear 85 are reliably engaged, and the take-up reel 9 is smoothly rotated in the tape winding direction.

A friction clutch is interposed between the gears 84 and 85, and the driving force is transmitted in the tape winding direction.
, the force in the winding direction is transmitted to the winding reel 9, but due to rotation in the opposite direction, the winding reel is not directly driven due to the presence of the one-way clutch. ing.

Also, from the state where a predetermined tape path is formed,
To rewind the tape into the small cassette A, the operating lever 45 should be rotated counterclockwise to apply a driving force in the winding direction to the take-up reel 9; Depending on the size of the take-up diameter of the reel (that is, the take-up diameter differs depending on how much tape is wound around the take-up reel 9), the extent to which the operating lever 45 must be rotated to make the small size (7) The difference is whether the tape is completely wound up in the tape path formed in the above.

In other words, if a long tape is already wound on the take-up reel 9 to wind up a certain length of tape, the rotation angle of the take-up reel 9 may be small because the take-up diameter is long. When no tape is wound on the side reel 9, the rotation angle of the take-up reel 9 must be wide 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 operation lever 450 and the take-up diameter of the take-up reel 9, when the operation lever 45 must be rotated to the maximum ( For example, when rotating the operating lever 45 from the dotted chain line position to the solid line position in Figure 5), consider
If you rotate the tape with
In order to prevent the tape from being forcibly stretched by rotating the operating lever 45 to the position A), the gears 84 and 85 are designed with a friction clutch structure. is configured to do so. Please rotate from X to Y position.
It is designed to allow extra winding in case of unexpected tape slack.

FIG. 10 is an explanatory view of the main part of the tape winding drive when the tape is pulled out for a long time and slack occurs in the tape path when the tape is pulled out.

That is, this mechanism has a cylindrical portion 1 on one side of the gear 82.
00 is integrally formed, an annular four part 1 is formed in the upper part of this cylindrical part 100, and wires 102 and 103 are inserted into the shaft and arranged in the upper part of the cylindrical part 100, A gear 83 is disposed in a part of this, and the gears 82 and 83 have a one-way clutch structure, so that they rotate idly when the loading lever 41 operates to form a tape path. Furthermore, a coil spring 1 is inserted into a hole 104 formed at a predetermined position of the gear 82.
One end of the coil spring 105 is inserted and locked, and the other end of the coil spring 105 is inserted and locked into a hole 107 of a cylindrical body 106 that is arranged around the cylindrical part 100 so as to wrap the coil spring 105. In addition, since the slit washer 108 is inserted into the annular recess 101 of the cylindrical portion 100, the upward movement of the cylindrical body 106 is restricted, and the brake shoe portion 87a is pressed against the circumferential side of the cylindrical body 1060. A braking force is applied in the tape drawing direction.

In such a configuration, when the operating lever 45 is rotated clockwise to pull out the tape and to form a predetermined tape path, the driving force of the operating lever 45 is transferred to the gear 46.4.
9.50, the tape is pulled out by the guide roller 43 to form a predetermined tape path. Gears 76 and 77 are connected to the gears 76 and 77 through teeth 22 formed on the periphery of the lower flute.
, 78, 79, 80, 81, 82, the gear 82 is rotated clockwise, and the cylinder 106 is rotated by the brake shoe portion 87a. Since the movement is restricted, the gear 82 and the cylinder 10
The coil spring 105, which is locked to the coil spring 6, is charged with a force that urges the coil spring 105 to rotate clockwise. Therefore, even if, for example, the operating lever 45 is turned too vigorously and excess tape is pulled out, the coil spring 105 will be charged when the force in the tape path forming direction is released after the tape path forming operation is completed. The force causes the gear 82 to rotate counterclockwise, operating the tape winding and storing mechanism using the gear, winding the excess tape onto the winding reel 9, and forming a normal tape path. become something that

Also, the force of the coil spring 105 is not so large;
If the tape is not drawn out excessively when forming a tape path, the braking force is smaller than the braking force of the supply reel, so the tape will not wind up and spin idly. The force charged in the coil spring 105 is released when the adapter is attached to the recording/reproducing device because the brake shoe portion 87a is separated.

Incidentally, 109 is an annular recess that is one size larger than the cylindrical body.

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 used by attaching it to a standard type recording or reproducing machine. , a rotating body that is interlocked with the operation of the operating section, a tape splicing section that rotates in conjunction with the operation of the rotary body, and a tape feeding means that includes a forcing means that positions the tape splicing section at a predetermined position. , so that a predetermined tape path can be formed by feeding out the tape from a small tape cassette attached to the storage part of the adapter.For example, it is possible to form a tape path that is approximately the same as that of a standard type tape cassette. One drive means can be constructed from three gears, which can be constructed extremely easily and at low cost. Also, by simply attaching a torsion coil spring to the gear, the drive force transmission of the gear can be improved, and the stopper and Together, they have the advantage of allowing the tape path to be formed accurately.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of a small cassette, FIGS. 4 and 5 are schematic explanatory diagrams of an embodiment of the tape force seven-sheet adapter according to the present invention, and FIGS. 6 and 7 are explanatory diagrams of a small cassette. Explanatory diagrams of main part operation of the tape cassette adapter according to the invention, FIGS. 8 to 1
FIG. 0 is a partial explanatory diagram of the tape cassette adapter. A. Small cassette, B adapter, 33 operation lid,
41 Loading lever, 43 Guide roller, 45 Operation lever, 46.49.50 Gear, 5
1 Non-Silicoil Buy. Applicant for the patent: Victor Japan Co., Ltd. Sen-sai 4Z, 5'f jσ J/Sai et al.

Claims (1)

[Claims] An adapter used when a tape cassette smaller than a standard type tape cassette is attached to a standard type recording or playback machine, and includes an operating section, a rotating body that is linked to the operation of this operating section, and a rotating body that is connected to the operating section. A tape feeding means is provided, which includes a tape splicing part that rotates in conjunction with the operation, and a forcing means for positioning the tape splicing part at a predetermined position,
1. A tape cassette adapter characterized in that a predetermined tape path can be formed by feeding out a tape from a small tape cassette attached to a storage section of the adapter.