JPS5916175A - Adapter for tape cassette - Google Patents

Abstract

PURPOSE:To eliminate the slack of a tape path to prevent the damage of a tape or a tape guide means, by decelerating the movement speed of the tape guide means, which feeds out the tape from a small-sized tape cassette, before a prescribed stop position. CONSTITUTION:A front cover 3 of a small-sized cassette A is opened to set the cassette A to a storage part A' of an adapter B and a loading start button 38 is depressed, motors 39-41 are operated, and tape feeding levers 42 and 43 are turned and moved to feed out the tape. Tape feeding levers 42 and 43 are brought into contact with projections before stop positions due to stoppers 58 and 74 and decelerate motors 40 and 41 to make their turning slower. After tape feeding levers 42 and 43 are stopped, pins 59 and 75 are brought into contact with switches 61 and 77 to stop motors 40 and 41. Then, the motor 39 is stopped also, and a holding member 93 is turned by the force of a spring 102, and a roller 92 is separated from a rotating body 95. Thus, the tape path approximately similar to the standard type tape path is formed, and when this adapter for setting the small-sized cassette is set to a recording and reproducing device, recording and reproducing are possible.

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 providing a speed switching mechanism that reduces the moving speed of the tape guide means for feeding the tape at a position before a predetermined stop position, for example, when a predetermined tape path is formed, slack will not occur in the tape path. To provide an adapter for a tape cassette which can be used as a tape cassette, and which is free from the risk of causing an accident such as damaging the tape or the tape guide means when the tape guide means hits a stopper and stops.

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 the tape path is the same as that of a 4-vote quasi-type tape cassette. Therefore, in order to make the small tape cassette substantially smaller, it is necessary to make the tape path of the small tape cassette different from the tape path of the standard type tape cassette, for example, on the supply side 1) in the small tape cassette. −
In order to make the distance between the tape cassette 7 and the take-up reel smaller than that of the standard type, and to record and play back a small tape cassette configured in this way with a standard type recording/playback machine, an adapter is used to connect the small tape cassette 7 to the take-up reel. ) must be able to be modified 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.

FIG. 1 is a perspective view of a tape cassette smaller than a standard type tape cassette for use in, for example, a standard type recording/reproducing machine, with its front lid open.

In the figure, A is a small power centimeter, and this small capacitor)A
The frame body consists of an upper half 1, a lower half 2, and a front cover 3 for protecting the tape, and the front cover 3 is rotatably attached to the upper part of the front side of the upper half 1 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 the groove 5 bored in the side surface of the upper half, 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.

(Small cassette) Inside A are the supply side reel 8 and the take-up side 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 with only the small cassette A. It is now shorter than the distance between them. 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 1o is wound from the supply reel 8 to the take-up reel 9 via the guide poles 1 and 12. An uneven groove is formed on the lower surface of the lower flange of the supply side reel 8, and an uneven groove is also formed at a predetermined position of the lower half 2 corresponding to the uneven groove on the lower flange, and the upper... The supply reel 8 is lowered by the action of the leaf spring attached to the flap 1.
- The recessed and recessed grooves engage with each other, the supply reel 8 is fixed, and the magnetic tape wound on the supply reel 8 is prevented from loosening. In addition, when the small cassette A is installed in the recording/reproducing machine, the supply reel 8 is increased by the specified amount...-71 by the supply reel disk of the recording/reproducing machine.
It is lifted to the side against the repulsive force of the leaf spring, and the grooves are disengaged from each other, allowing rotation. That is,
A hole 13 for inserting a supply reel disk of a recording/reproducing machine is formed in the lower half 2 at a position corresponding to the supply reel 8, so that the supply reel disk can be inserted into the supply reel 8. . Further, the take-up reel 9 is inserted into a shaft 14 fixed to the lower half 2, and this shaft 1
A brake mechanism is arranged on the take-up reel 9, which can rotate about 4, to prevent the take-up reel 9 from rotating when the small cassette A is not installed in the recording/reproducing machine. It is set up. This brake mechanism is
It consists of a brake that presses the upper surface of the peripheral edge of the lower flange 15 of the take-up reel 9, and this brake is inserted into a shaft formed integrally with the lower half 2, and is pressed and biased by the action of a spring. In the case of brake /
A part of the magnetic tape is in pressure contact with the surface of the lower flange 15, and the take-up reel 9 does not rotate, so that the magnetic tape is loose.

Furthermore, when the small case (small case) A is attached to a recording/reproducing machine or an adapter described later, a force is applied that resists the repulsive force of the spring, and a portion of the brake is separated from the lower flange 15 surface, causing the take-up reel 9 to rotate. Be able to move. Take-up reel 9
The rotation is different from that of the supply reel 8, and the teeth 16 formed on the peripheral side surface of the lower flange 15 of the take-up reel 9
This is done by a driving force transmission medium that meshes with the

Therefore, when the small cassette A is attached to the adapter for use in a recording and reproducing machine exclusively for this small cassette or a standard type recording and reproducing machine, the lower... A notch 17 is formed.

Fig. 2 is a partial perspective view of a tape cassette adapter for use in a standard type recording/reproducing machine, and Figs. 3 and 4 show the upper nof of the tape cassette adapter. It is an explanatory view of a removed state.

In the same figure, reference numeral B indicates an adapter having an external shape that is approximately the same as that of a standard type tape cassette.
- Consisting of -F 31 and lower -F 32, small power cent A
A storage section A. is configured to store the.

Further, a lid 33 is provided at the opening of this storage section A'.

Then, when the lid body 33 is opened and the small cassette A is attached to the storage section A' with the front lid 3 open, the contact piece of the switch 34 provided on the front side wall of the storage section A' will touch the small cassette. 7) It is configured to be turned on by being pressed by the back part of A, and the small cassette A
When the lid 33 is closed after being attached, the lock part 3 of the lid 33
5 fits into and engages with the engagement recess 36 of the adapter I3, and the contact piece of the switch 37 provided at the bottom of the four retaining parts 36 is pressed to turn on the switch. In other words, when the small knife A is set in the storage section A' of the adapter B and the lid 33 is closed, the tape feeding mechanism, which will be described later, is activated.

Reference numeral 38 denotes a rotating start button, and when this rotating start button 38 is pressed with the switch 34°37 on, the motor 39 is driven, and at the same time as the motor 39 starts driving, the motor 40°41 is driven. is configured to be And motor 40,4
], the tape feeding lever 4243 rotates from the solid line position in FIG. 3 to the solid line position in FIG. The tape is fed out by a guide roller 4445 provided in the tape cassette, and a predetermined tape path, that is, a tape path substantially similar to the tape path of a standard type tape cassette is formed.

The motor 40 is mounted on a mounting plate 46 having a cross-sectional shape, and the motor shaft of the motor 40 is inserted into a hole in the upright portion of the mounting plate 46 to be mounted. Since the worm 47 is attached to the shaft, the gear 48 which is aligned with the worm 47 by 11i°+1 is rotated by the drive of the motor 40, and the gear 48 is rotated by the rotation of the gear 48 in the counterclockwise direction in FIG. The bar 49, one end of which is connected to the bar 49, is moved downward. And bar 49 is the third
When moved downward in the figure, the rotating body 55 connected to the other end of the 49 rotates counterclockwise, and the tape feeding lever 42, which is integrated with this rotating body 55, moves to the stopper 58. It can be rotated by changing the stop position.

That is, the tape feeding lever 42 is displaced from the state shown in FIG. 3 to FIG. 4 by the drive of the motor 40, and the tape is fed out from the small cassette A.

As the details of the tape feeding lever 42 are shown in FIG. The tape feed lever 4
2, the protrusion 50.5] is connected to the switch 525.
3 and is configured to be suinothiono.

That is, the tape feeding lever 42 starts operating by pressing the rotating start button 38, and as shown in FIG.
When the protrusion 50 is rotated from the point position to the point 13A, the protrusion 50 comes into contact with the switch 52, but this switch 52 is configured so that no change occurs.Then, when the protrusion 50 is rotated further and the tape feeding lever 42 is moved to the position C. When the point position is reached, the protrusion 51
contacts the switch 53, and this contact causes the motor 40 to
The speed control circuit is activated, the driving speed of the motor 40 is reduced, and the tape feeding lever 42 is then slowly rotated in the same direction until it hits the collar 58 and stops.

The motor 40 is configured such that the tape feeding lever 42 is
In the state shown in the figure, the bottle 59 installed downward from the bottom of the gear 48 separates from the switch 60 and comes into pressure contact with the switch 61, at which point the motor 40 stops.

The motor 41, which is the drive source for rotating the tape feed lever 43, operates simultaneously with the motor 4o. The rotational force is transmitted from the worm 63 to the gear 64, and the tape feeding lever 43
rotation is performed. Note that this gear 64 is rotatably supported by a mounting plate 65. A pin 66 is installed in the gear 64, and one end of a bar 67 is connected to the pin 66, and the other end of the bar 67 is connected to a pin 68 installed in the base of the tape feed lever 43. It can be installed freely. The driving force from the gear 64 is then applied to the bar 67.
The signal is transmitted to the tape feed lever via the . The tape feed lever 43 is rotatably supported on the ceiling of the upper half 31 and the bottom of the lower half 32 of the adapter B at the base.

As shown in detail in FIG. 6, the tape feeding lever 43 has a protrusion 69 at a predetermined position on the base of the tape feeding lever 43.
．． 70 is provided, and a switch 7L72 is provided at a predetermined position relative to the protrusion 69.70.
contacts the switches 71 and 72 to turn on the switch.

That is, the tape feeding lever 43 starts operating by pressing the rotating start button 38, and as shown in FIG.
When the protrusion 69 is rotated from the point position to the B point position, the protrusion 69 comes into contact with the switch 71, but this is configured so that no change occurs; When the position C is reached, the protrusion 7o comes into contact with the switch 72, and this contact activates the speed control circuit of the motor 41, reducing the drive speed of the motor 41 and thereafter slowly rotating the tape feeding lever 43 in the same direction. Then, it stops when it hits the stopper 74.

The motor 41 is configured so that the tape feeding lever 43 is
In the state shown in the figure, the pin 75 provided on the lower side of the gear 64 moves from the contact state with the switch 76 to the contact state with the switch 77, and the driving of the morley 41 is stopped. Note that this motor stopping mechanism is similar to the stopping mechanism of the motor 40.

Moreover, when the motor 39 operates in the state shown in FIG.
The rotational force of the motor 39 is transmitted to the roller 92, and the holding member 93 of the roller 92 rotates clockwise around the rotation shaft 94 of the motor 39 due to this rotational frictional force. come into contact with each other, and one driving force is transmitted to the rotating body 95.

The rotational force of the rotating body 95 is transmitted to the gear 96 through a friction structure as shown in FIG.
The tape is transmitted to the take-up reel 9 of the small-sized machine (A) through the gear 97 meshing with the gear 97 and the gear 98 formed integrally with the gear 97, and the loose tape is taken up on the take-up reel 9. You will be able to do it. Furthermore, if the tape is small and is fed out from the cassette A by the guide rollers 44 and 45 of the tape feeding lever, this driving force in the tape winding direction acts on the tape as a braking force in the opposite direction to the tape feeding direction. This prevents excess tape from being fed out even if the tape is pulled out forcefully. Further, this driving force in the tape winding direction is applied to the supply reel 8 of the small cassette A when the tape is pulled while the tape is wound to the maximum on the supply reel 8. The structure is such that a force that is somewhat smaller than the force that causes the supply side reel 8 to spin idly against the applied brake is transmitted. This is designed so that the tape is always fed out from the take-up reel 9 when the tape is fed out, and this force is controlled by the above-mentioned flick/yon structure. , a gear 96 shown in FIG. 8, a felt 99 placed thereon, and a rotating body 95 which is a gear on this felt.
, and a spring 101 that presses this rotary body 95 in cooperation with an annular body 100, so that even when the tape is fed out to a predetermined position, the tape resists the braking force of the supply reel 8. The torque is set so that the winding reel 9 can easily take up the winding material.

Since this motor 39 is configured to stop after the motors 40 and 41 stop, the motor 39 stops after a predetermined tape path is formed by the guide rollers 45, and the roller 92 is moved by the spring 102. The rotating body rotates counterclockwise due to the force of! -) will move away from 5. Therefore, after a tape bus that is approximately the same as the tape path of a standard type tape cassette is formed, even if this adapter is attached to a standard type recording/playback machine and the recording/playback machine is operated, the recording/playback will not be possible. Even if the take-up side reel disk of the playback machine is fitted into the guide hole 103 of the gear 96 and the driving force of the take-up side reel disk is transmitted, the roller 92 and the rotating body 95 are separated. No brake force is applied - Guide hole 1 into which the take-up reel disk of the recording/reproducing machine fits
An annular recess 104 is formed in the ceiling of the adapter B in which the gear 96 having the number 03 is disposed, and the gear 96 is structured to be able to move somewhat within the range of the annular four parts 104. Gears 97 and 98 that transmit driving force to the take-up reel 9 are an annular body 1 that is rotatably loosely fitted to the non-gear side wall of the gear 96 via a bearing 105.
The annular body 106 is pivotally supported by the holder 106.
It is designed to move along with the movement of.

Further, one end side of a sliding plate 107 is rotatably attached to this gear 98, and the other end side of the sliding plate 107 is attached to the winding side of the small cassette A installed in the adapter storage section. Since it is rotatably attached to the adapter at a position corresponding to the rotation axis position of the reel 9, for example, even if the gear 96 is misaligned, the gear 98 will mesh with the take-up reel accordingly. And the gear 97 is meshed with the gear 96,
One driving force of the take-up reel disk of the recording/reproducing machine is reliably transmitted to the take-up reel 9.

The gear 96 is loosely engaged with an annular part 109 provided at one end of the base part 108 on which the motor 39 is mounted, and the bearing 05 and the annular body 106 are fitted in this loose part. is press-fitted and held in between. Furthermore, the movement of this gear 96 is mainly centered around the spindle 110 in the vertical direction in FIG. move in conjunction with each other around these support shafts 110 and 111, and this movement is caused by the movement of the four annular parts 1.
It is regulated by the periphery of 04.

The motor 39 is attached to the base portion 108, and the rotation shaft 94 of the motor 39 hangs down from the base hole opening 2. A holding member 93 is rotatably attached to this rotating shaft 94, and a shaft of a roller 92 is disposed in a recess 113 of this holding member 93, and the roller 92 is in pressure contact with the rotating shaft 94. As described above, the roller 92 rotates due to the rotational friction force. The way to attach the roller 92 to the roller 92 is as shown in FIG.
14 is horizontally suspended on the side wall of the recess 113, and a spring 115 is provided on this pin 114, and applies a spring force to the protrusion 116 formed at the bottom of the recess 113 and the lower part of the roller 92. With this configuration, the roller 92 is brought into pressure contact with the rotating shaft 94. Note that 11v is the opening of the recess 113, which facilitates attachment of the roller 92.

When the adapter is configured as described above, the loading operation is to first open the lid 33 of the adapter B, then attach it to the storage compartment A' with the front lid 3 of the small camera A open. When the lid body 33 is closed and the loading start button 38 is pressed, the motors 39, 40, 4] operate, and the tape feeding lever 4z43 is activated via the respective driving force transmission medium.
begins to rotate and the tape in the small cassette begins to be fed out. And the tape feed lever, -42,4
3 rotates at a predetermined speed and rotates at a position slightly before the stop position by the stopper 58.74, and the projection 5170
When contacting the switch 53.72, the speed control circuit of the motor 40.41 is activated to reduce the driving speed of the motor 4Q41, thereby slowing down the rotational movement speed of the tape feed lever 4z43. The tape feeding lever 4443, which moves at a slower speed,
It hits 4 and stops. Also, tape feed lever 4z43
After the motors 40 and 41 stop, the pier 59.75 contacts the switch 61.77, and the motors 40 and 41 also stop at this point. Also, by stopping the motors 40 and 41, the motor 39
stops, the holding member 93 provided with the roller 92 is rotated by the force of the spring 1020, and the row 292 separates from the rotating body 95 and hits the stopper and stops.

At the end of the above operation, the tape has been fed out from the small cassette A, forming a tape path that is almost the same as that of a standard tape cassette, and this small cassette attachment adapter can be used in a recording/playback machine. Once installed, recording and playback will be possible.

In particular, during the tape path forming operation, the moving speed of the tape feeding lever is reduced compared to the position before the stopper stops, so the impact force upon collision with the stopper is weak, and the stopper, tape feeding lever, The guide rollers are less likely to be damaged, and since the rotation speed of the tape feed lever is slow, there is no fear that the tape will be fed out excessively and a loose tape path will be formed. The tape path can be formed accurately, and the tape path can be formed more quickly than when the tape feed lever is rotated slowly from the beginning.

After recording and playback, when the small cassette mounting adapter is removed from the recording and playback machine and the unloading button 118 is pressed, the motor 41 rotates in the opposite direction to the above case, and the tape feed lever 43 moves from the state shown in FIG. Returning to the state shown in FIG. 3, the motor 41 stops when the pin 75 contacts the switch 76, and immediately after that, the motor 40 rotates in the opposite direction to the above case, and the tape feeding lever 42 changes from the state shown in FIG. Returning to the state shown in FIG. 3, the motor 40 stops when the pin 59 contacts the switch 60, and during these operations, the motor 39 again rotates in the same direction to transfer the tape winding drive force to the take-up reel. 9, and at the same time as the motors 40 and 41 stop, the motor 39
The cassette 7 also stops, and it is in the same state as when it was attached to the small cassette 7 A fJ' adapter.

It should be noted that during the storage operation of the tape winding 9, as well as during the tape path forming operation, the rotational movement speed is decelerated at a position before the stop position of the tape feeding lever. That is, in FIGS. 5 and 6, when the tape feeding lever returns from the D point position to the A point position, the lever 50°69 contacts the switch 52.71 at the B point position, and this contact causes the motor to The speed control circuits 40 and 41 are activated to reduce the driving speed of the motors 40 and 41. Note that during this operation, that is, at the point C position, the protrusion 51. , 70 is the switch 53
．． Even if it touches 72, the speed control circuit will not operate.

Then, open the lid 33 of the adapter B and take out the small cassette A from the storage section A'.

FIG. 7 is an explanatory view of the main parts when the rotational movement speed of the tape feeding lever of the tape cassette adapter according to the present invention is switched not by electrical control but by a mechanical structure.

For example, the gear 64 and the bar 67 can be attached by taking their positions into consideration. That is, when the guide roller 45 of the tape feeding lever 43 is in the position before tape feeding, the position of the pin 66 is at point A in FIG. The gear 64 rotates clockwise so that the tape feed lever is in the position B in FIG.
When the pin 66 is at the point position, the pin 66 corresponds to the point B in FIG. When the gear 64 rotates further and the tape feed lever is at the midpoint position in FIG. 6, the pin 66 corresponds to the midpoint position in FIG. 7. With this configuration, even if the rotational speed of the gear 64 is constant, the bar 67,
In other words, the speed of the pin 66 in the left-right direction in FIG. 7 is not constant, and it moves slowly at the position between AB, at the position between 80 and slowly, Therefore, due to the change in the speed of the bar 67, the rotational speed of the tape feeding lever becomes smaller from before the stop position of the tape feeding lever by the stopper, and the same effect as in the previous embodiment is achieved.

It should be noted that the speed switching means based on the mechanical structure described above can be similarly configured on the tape feeding lever 42 side.

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. A tape guide means for feeding out a tape from a small tape cassette to form a predetermined tape path, and a position before the completion of tape feeding on a path from a tape feeding position by the tape guide means to a predetermined tape feeding completion position, or Since the tape guide means is provided with a means for switching the moving speed of the tape guide means before the tape payout position on the route from the tape payout completion position to the tape feed position, the tape guide means can be stopped slowly, and the tape guide means can be stopped easily. The tape guide means, tape, etc. are unlikely to be damaged when stopped, and
It has the advantage that tape slack is less likely to occur during tape path formation, tape path formation is accurate, and tape path formation operation can be performed speedily.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a small cassette, FIGS. 2 to 4 are schematic explanatory diagrams of a tape cassette adapter according to the present invention, and FIG.
- Figures 6 and 7 are explanatory diagrams of the main parts, Figures 8 and 9
The figure is a partial explanatory diagram. A. Small cassette, B. Adapter, 4243 Tape feeding bar, 44.45. Guide roller. Patent applicant: Victor Japan Co., Ltd. 2-. Mi, - person

Claims (1)

[Claims] This is 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 the tape is fed out from the small tape cassette attached to the adapter to create a predetermined tape path. A tape guide means to be formed, and a position before the completion of tape feeding on a path from the tape feeding position by this tape guide means to a predetermined tape feeding completion position, or before a tape feeding position on a path from the tape feeding completion position to the tape feeding position. A tape cassette adapter characterized by comprising means for switching the moving speed of the tape guide means.