JP2000306293A - Recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video cassette recorder capable of shortening the time of tape loading even when a cassette is in a tape top position (or in a tape end position). SOLUTION: A video cassette recorder is provided with a motor for magnetic tape loading/unloading, and a motor for tape cassette loading/discharging, the reel base 3 of a tape feeding reel side is set in a braked state during the loading/unloading operation of a magnetic tape, and a magnetic tape is drawn out from the tape winding reel side of a reel base having no brake. In this case, the motor for tape cassette loading/discharging is driven in linkage with the detection of the tape top of the tape cassette, a slider 44 and a second brake releasing slider 36 are slid and moved via a rack plate, a brake mechanism 22 is released from the reel base 3 of the tape feeding reel side is released to draw out a tape from the tape feeding reel, and a tape loading operation is then performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus suitable for use in a video cassette recorder (VCR) and the like. Even when there is not enough tape, such as at the end of the tape, the tape cassette loading / unloading motor can be driven to release the brake on the reel base, enabling tape pull-out operation and loading. It is possible to reduce the time.

[0002]

2. Description of the Related Art In a conventional recording / reproducing apparatus such as a video cassette recorder, a tape cassette during a recording operation or a reproducing operation is temporarily ejected (unloaded) from the recording / reproducing apparatus, and is loaded again into the recording / reproducing apparatus. When loading or unloading a tape, the tape supply reel or the tape take-up reel should be mounted on either one of the reel bases so that recording or playback can be performed from the same tape position. The brake is applied, and the tape can be pulled out or wound up from a tape reel on a reel base without a brake.

For example, in the following description, a description will be given of a brake operation when a brake is applied to a reel base on a tape supply reel side during loading and unloading, and a tape is pulled out / rewound from a tape take-up reel side.

At the time of loading, the following two operations are assumed. 1. When there is a sufficient amount of tape to be pulled out to the tape take-up reel side, in this case, the tape is pulled out from the tape take-up reel side to perform a loading operation, and the tape can be correctly wound around the drum. 2. If there is not enough tape to be pulled out to the tape take-up reel side, in this case, the tape is in the tape top state or a state close to the tape top state, and the tape drawn out from the tape take-up reel side does not come out. The tape cannot be wound.

Here, in order to cope with the process at the top of the tape in the case of the above-mentioned "2", if it is detected by the sensor that there is no tape to be pulled out before the start of the loading, the tape supply reel is detected by some method. It is necessary to release the brake state of the reel stand on the side, pull out the tape from the tape supply reel side, and load the tape.

Therefore, conventionally, it is common to release the brake using a loading motor (mechanical mode transition motor) as a drive source, and in this operation, it is necessary to move to a mechanical position for releasing the brake.

In the tape loading operation in the tape end state or in a state close to the tape end state, the tape is pulled out from the tape take-up reel side and the loading operation is performed while the reel base on the tape supply reel side remains in the brake state. Will be

In the unloading operation in the tape top state, the tape is wound on the tape winding reel while the reel base on the tape supply reel side remains in the brake state.

Contrary to the above, there is a case where a brake is applied to the tape take-up reel side during loading and unloading, and the tape is pulled out / taken up from the tape supply reel side. Is performed in the same manner as described above.

[0010]

In the above-described conventional brake releasing method, the driving source for loading the tape and the driving source for releasing the brake are one in number.
In the case of using one motor, the tape is loaded once after moving to a mechanical position for releasing the brake and releasing the brake as an operation procedure.

Therefore, when the cassette is at the top tape (or end tape) position, there is a problem that the time required to start loading is longer than the normal tape loading time other than the top tape (or end tape). . From this, even in the case of a new cassette in a top tape state, it takes a long time to start loading.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a recording / reproducing apparatus capable of shortening a loading time even when a cassette is at a top tape (or an end tape position). The purpose is to:

[0013]

In order to achieve the above object, a recording / reproducing apparatus according to the present invention comprises a dedicated motor for loading / unloading a tape cassette separately from a motor for loading / unloading a magnetic tape. When the tape top or the tape end of the tape cassette is detected, the tape cassette loading / unloading motor is driven, and the brake is released from the reel base by the brake releasing means that operates accordingly.

According to the recording / reproducing apparatus described above, since the brake is released from the reel base by using the motor for loading / unloading the tape cassette, the loading / unloading motor is driven almost simultaneously with the release of the brake from the reel base. The tape can be pulled out, and the loading time of the tape or end tape can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a recording / reproducing apparatus according to the present invention will be described with reference to a video cassette recorder (VCR).
Will be described with reference to the drawings.

FIG. 1 is a plan view of a cassette compartment (hereinafter referred to as a cassette) of the video cassette recorder of this embodiment.

The entire cassette is indicated by reference numeral 1, and the direction of the arrow is the insertion direction of the tape cassette C indicated by a virtual line.
The tape cassette C is mounted on the cassette holder 2, pulled into the cassette 1, and loaded at the loading position. 1 shows only a main mechanism in FIG. 1, and a tape supply reel and a tape take-up reel (not shown) of the tape cassette C have a tape supply reel on one side in a state where the tape cassette C is loaded at a loading position. The tape take-up reel on the other side is mounted on the reel base 4.

Transmission gears 7 and 8 are meshed with both reel bases 3 and 4 via relay gears 5 and 6, respectively, and swing gear 9 can be selectively meshed with both transmission gears 7 and 8. The oscillating gear 9 is driven to rotate by a reel motor 10. The oscillating gear 9 oscillates left and right in accordance with the forward or reverse rotation of the reel motor 10, and relays when the oscillating gear 9 meshes with the transmission gear 7. The reel base 3 is rotated via the gear 5 to drive the tape supply reel of the tape cassette C. When the swing gear 9 meshes with the transmission gear 8, the reel base 4 is rotated via the relay gear 6 to drive the tape take-up reel of the tape cassette C.

On the other hand, when the tape cassette C is loaded at the loading position, the magnetic tape is pulled out of the tape cassette C by a pair of left and right guide rollers 11, 12 and inclined guides 13, 14, which are loading mechanisms. The slide blocks 15 and 16 supporting the guide 12 and the inclined guides 13 and 14 move along the guide grooves 17 and 18, and the tape is helically wound around the drum 19, so that the recording / reproducing operation can be performed.

Here, in the video cassette recorder of this embodiment, the cassette holder 2 is moved from the discharge position shown in FIG. 1 to the loading position, and the driving source for moving the cassette holder 2 from the loading position to the discharge position is a cassette loading / discharging motor 20. The driving source for moving the loading mechanism between the loading position and the unloading position is performed by a loading / unloading motor 21.

Further, in the video cassette recorder of this embodiment, during loading and unloading of the tape, the brake is applied to the reel base 3 on the tape supply reel side by the brake mechanism 22, and the reel base 4 on the tape take-up reel side is applied to the reel base 4 on the tape take-up reel side. There is no brake member, and therefore, a mechanism is employed in which the tape is taken out and wound up by a tape take-up reel.

As shown in FIG. 2, the brake mechanism 22 engages a brake projection 24 extending from one side of a fulcrum shaft 23 with a transmission gear 7 for transmitting a rotational driving force to the reel base 3, and is in a state where a brake is applied. I have. On the other side of the fulcrum shaft 23, an operating rod 25 is extended, and an operating pin 26 is provided in the middle of the operating rod 25 and vertically protruded downward. Note that the above-described brake mechanism 22 is a return spring 2
The spring projection 7 urges the brake projection 24 in the direction of engagement with the transmission gear 7.

A first brake release slider 29 is provided on a part of the main slider 28 on the back side of a cassette chassis (not shown) so as to correspond to the brake mechanism 22 described above. This first brake release slider 29
The tape in the cassette is used, for example, during a normal loading operation other than the tape top state, and a brake release cam 30 is formed on the first brake release slider 29. A guide groove 32 is engaged with a guide shaft 31 protruding from the cassette chassis, and the main slider 28 is slidable in a direction indicated by an arrow by a main slider arm 33 operated by driving the above-described loading / unloading motor 21. . A cam groove 34 is separately formed in the main slider 28, and a pin 35 is engaged with the cam groove 34.

With this configuration, for example,
In the normal loading operation, the main slider 28 is moved rightward in FIG. 2 by the main slider arm 33 in conjunction with the operation in which the tape is pulled out from the tape take-up reel having no brake and the loading is completed. Brake release cam 30 of brake release slider 29
With the operation of pushing back the operation pin 26 of the brake mechanism 22, the brake projection 24 is released from the transmission gear 7, and
The reel base 3 on the tape supply reel side is rotated to record /
A reproduction operation is performed.

As shown in FIG. 3, a second brake release slider 36 is provided at a position corresponding to the above-mentioned brake mechanism 22 on the inner surface side of a cassette chassis not shown. The second brake release slider 36 is used at the time of a loading operation when the tape in the cassette is in a tape top state, for example. The second brake release slider 36 has a guide groove 38 engaged with a guide shaft 37 attached to the cassette chassis and is slidable in the direction of the arrow.

An operation piece 39 is formed on a part of the second brake release slider 36, and this operation piece 39 corresponds to the arm piece 40 formed on the brake mechanism 22. A claw piece 41 for sliding the second brake release slider 36 is formed at an end of the second brake release slider 36.

The above-described second brake release slider 36
Is a side plate 4 of a cassette control frame 42 for moving the cassette holder 2 in the loading direction and the discharging direction.
3 is performed by the sliding operation of the slider 44 attached to the third.

The construction of the slider 44 together with the side plate 43 of the cassette frame 42 will be described below with reference to FIG.

A pair of L-shaped guide grooves 45 and 46 are formed in the side plate 43 of the cassette frame 42 in parallel with each other in the vertical direction, and a rack plate 47 is arranged on the outer surface of the side plate 43. Two holder pins 48, 49 protruding from the cassette holder 2 are respectively engaged with the L-shaped guide grooves 45, 46, and one of the holder pins 48 is formed on the rack plate 47 through one L-shaped guide groove 45.
And the other holder pin 49 is connected to the other L
It is engaged with the upper end of the inclined guide groove 50 formed in the rack plate 47 through the shape guide groove 46.

The slider 44 is mounted on the inner surface of the side plate 43 of the cassette frame 42. The slider 44 includes guide pins 43a, 43b, 43c fixed to the side plate 43, and guide grooves 44a, 44b,
44c is slidable in the front-rear direction by engaging
A second switch operation piece 51 is formed on the slider 44. A first engaging piece 52 is formed at the front end of the slider 44 to be engaged with the rack plate 47.
A second engagement piece 53 for sliding the second brake release slider 36 described above is formed at the rear end of the second engagement piece 53.

An operation member 55 having a first switch operation piece 54 is provided on the inner surface side of the slider 44. The operating member 55 is supported by a fulcrum pin 56 fixed to the slider 44, and is capable of swinging vertically around the fulcrum pin 56 along the guide pin 43b along the guide pin 43b. A cam-shaped projection 57 is formed on the lower side of the operation member 55, and an operation pin 58 is provided on the slider 44 corresponding to the cam-shaped projection 57. further,
A locking piece 59 is formed on the upper rear end of the operation member 55. A tension coil spring 60 is stretched between the operation member 55 and the slider 44 to urge the operation member 55 downward.

Here, the cassette loading / unloading on the cassette chassis corresponding to the first switch operating piece 54 of the operating member 55 is performed.
A first switch 61 for driving the discharge motor 20 is provided, and a second switch operation piece 51 of the slider 44 is provided.
A second switch 62 for stopping the cassette loading / unloading motor 20 is arranged on the cassette chassis in correspondence with the above.

The driving force of the cassette loading / discharging motor 20 is such that the rack plate 47 is slid from the output gear 20a via the relay gears 63, 64 and 65. At this time, the rotation of the relay gear 63 drives the opposite relay gears 63a, 64a and 65a via the connecting shaft 66, and the pair of left and right rack plates 47 can slide in the same phase.

Next, the loading operation of the above-described video cassette recorder will be described with reference to the drawings.

First, the operation up to the normal tape loading operation when the tape cassette C has a sufficient amount of tape to be pulled out from the tape take-up reel 4 without a brake will be described.

FIG. 4 shows a state in which the tape cassette C is ejected, that is, a state in which the cassette holder 2 is in the ejecting position. Pushed back,
The operation member 55 is in a state of moving upward.

Here, when a tape cassette (not shown) is inserted into the cassette holder 2 to the innermost position and pressed, the locking piece 59 is released from the holder pin 49 and the operating member 55 moves the fulcrum pin 56 by the tension coil spring 60. As shown in FIG. 5, the first switch 61 is turned on by the first switch operation piece 54 to turn on the first switch 61. When the first switch 61 is turned on, the cassette loading / discharging motor 20 is driven, and the cassette holder 2 is retracted. That is, the rack plate 2 is driven by the power from the cassette loading / unloading motor 20 via the relay gears 63 to 65.
Slides, the holder pins 48 and 49 of the cassette holder 2 are drawn in along the L-shaped guide grooves 45 and 46, and further lowered along the vertical grooves 45a and 46a to be loaded at the loading position shown in FIG. .

Here, when the tape cassette in the cassette holder 2 is loaded at the loading position, a detection switch (not shown) is operated to complete the loading of the tape cassette, and the cassette loading / discharging motor 20 stops. Thereafter, the loading / unloading motor 21 is driven, the tape is pulled out from the tape take-up reel of the cassette C without the brake, and the loading operation is started.

Next, the tape loading operation in the case of a so-called tape top process in which the tape cassette C has no sufficient amount of tape to be pulled out from the tape take-up reel 4 without a brake will be described.

Until the tape cassette C is loaded at the loading position as shown in FIG. 6, the operation is the same as the normal operation described above, except that the tape in the loaded tape cassette C is in the tape top state. Is detected by a tape detection sensor (not shown), the cassette loading / discharging motor 20 is driven again in conjunction with the detection by the sensor. That is, the rack plate 47 is further retracted by the distance of the horizontal guide groove 50 a of the inclined guide groove 50 by re-driving the cassette loading / unloading motor 20. With this operation, as shown in FIG. 7, the first engaging piece 52 of the slider 44 is engaged by the locking surface 47a of the rack plate 47, and the slider 4 is slid.
The second second engagement piece 53 engages with the above-mentioned claw piece 41 of the second brake release slider 36, and the second brake release slider 36 slides. As a result, the operating piece 39 of the brake release slider 36 rotates the arm piece 40 of the brake mechanism 22 to move the brake projection 24 to the transmission gear 7.
And the reel base 3 becomes free, and the tape can be pulled out from the tape supply reel.

At this time, the second switch 62 is turned on by the second switch operating piece 51 of the slider 44 which slides in conjunction with the pull-in operation of the rack plate 47, and the cassette loading / discharging motor 20 is stopped. Further, the sliding operation of the slider 44 causes the operation pin 58 to come into contact with the cam-shaped projection 57 of the operation member 55 so that the operation member 55
And the first switch 61 is turned off.

Thus, the tape in the cassette C is pulled out from the tape supply reel side by the driving of the loading / unloading motor 21, and the loading operation is performed, so that the tape top state can be reliably handled. Therefore, in the present invention, the operation of releasing the brake on the reel base 3 on the tape supply reel side by the cassette loading / unloading motor 20 and the operation of loading the tape by the loading / unloading motor 21 can be performed almost simultaneously. For example, the loading time from when a new tape cassette in the tape top state is inserted into the cassette holder to when recording / reproduction is possible can be reduced.

When the recording / reproducing operation is completed and the tape cassette is to be ejected, the loading / unloading motor 21 is driven to take up the tape on the tape take-up reel. Returning to the position shown in FIG. 6, the reel base 3 on the tape supply reel side is brought into the brake state by the brake mechanism 22, and at the same time, the first switch operating piece 54 of the operating member 55 turns on the first switch 61, Cassette loading / unloading motor 20
Is driven in reverse, and the cassette holder 2 returns to the discharge position.

In the unloading operation in the case of the tape top, the tape can be wound on the tape winding reel 4, and therefore, in this case, the operation of releasing the brake is not performed on the reel base on the tape supply reel side. .

In the above description of the operation, the tape top processing in the case of the video cassette recorder in which the brake is applied to the reel base on the tape supply reel side has been described. The same can be applied to the tape end processing in the case of a video cassette recorder of the type that applies a brake.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

In this embodiment, the case has been described in which the brake is applied to the tape supply reel side and the tape is pulled out or taken up from the tape take-up reel side. The same can be applied to the case where the tape is drawn or wound from the reel side.

Although the present invention has been described with respect to tape top processing or tape end processing, for example, when a soft brake or the like is applied to the reel base when suddenly stopping or rapidly decelerating during high-speed running of the tape. It is widely applicable to

Although the recording / reproducing apparatus of the present invention has been described for the case of tape top processing or tape end processing in the case of a video cassette recorder, the tape top processing or tape end processing of a recording / reproducing apparatus for audio or the like is also described. Is also widely applicable.

[0050]

As described above, the recording / reproducing apparatus according to the present invention has a dedicated motor for loading / unloading the tape cassette, separately from the motor for loading / unloading the magnetic tape. When the top / tape end is detected, the tape cassette loading / unloading motor is driven to release the brake on the reel base, so the tape can be pulled out by the loading / unloading motor almost simultaneously with the release of the brake on the reel base. Thus, the loading time of the tape top or the tape end can be reduced. As a result, there is an effect that the loading time from when a new tape cassette is inserted into the cassette holder to when recording / reproduction is possible can be reduced.

The brake releasing means stops after the tape cassette is completely loaded by driving the tape cassette loading / discharging motor, and slides the slider via the rack plate by re-driving the motor. Since the brake release slider is moved by this slider to release the brake member from the reel base, it is only necessary to newly add a slider and a brake release slider, and a highly reliable brake release operation can be performed.

[Brief description of the drawings]

FIG. 1 is a plan view of a cassette player of a video cassette recorder according to the present invention.

FIG. 2 is a plan view of a normal brake release mechanism.

FIG. 3 is a plan view of a brake release mechanism at the time of tape top or tape end.

FIG. 4 is an operation diagram of the cassette holder when the cassette holder is in a discharge position as viewed from a side.

FIG. 5 is an operation view of the cassette player immediately after the tape cassette is inserted into the cassette holder, as viewed from the side.

FIG. 6 is an operation view of the cassette in which the cassette holder is loaded at the loading position as viewed from the side.

FIG. 7 is an operation diagram of the cassette player when the brake is released, as viewed from the side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Kasecon, 2 ... Cassette holder, 3 ... Reel stand on tape supply reel side, 4 ... Reel stand on tape take-up reel side, 7, 8 ... Transmission gear, 9 ... Swing gear, 20 ... Cassette loading / discharging Motor, 21: loading / unloading motor, 22: brake mechanism, 24: brake projection, 25: operating rod, 28: main slider, 29 ...
1st brake release slider, 30 ... brake release cam, 36 ... second brake release slider, 39 ... operating piece, 40 ... arm piece, 41 ... claw piece, 42 ... cassette player frame, 44 ... slider, 45, 46 ... L-shaped guide groove, 4
7: rack plate, 47a: locking surface, 48, 49: holder pin, 50: inclined guide groove, 51: second switch operation piece, 52: first engagement piece, 53: second engagement piece, 54 ...
1st switch operation piece, 55 ... operation member, 57 ... cam-like projection, 58 ... operation pin, 59 ... locking piece, 61 ... first switch, 62 ... second switch, C ... tape cassette

Claims (3)

[Claims] 1. A motor for loading / unloading a magnetic tape and a motor for loading / unloading a tape cassette, and braking one of two tape reels when loading / unloading a magnetic tape. In a recording / reproducing apparatus in which the magnetic tape can be pulled out / taken up from the tape reel of the other reel base without a brake, the state described above is linked to the detection of the tape top or the tape end of the tape cassette. A recording / reproducing apparatus wherein a motor for loading / unloading a tape cassette is driven, a brake releasing means releases a brake on a reel base in a brake state, and a magnetic tape can be pulled out. 2. The recording / reproducing apparatus according to claim 1, wherein said brake releasing means is provided for loading / unloading said tape cassette.
A slider that slides via a rack plate by re-driving the tape cassette loading / discharging motor from a state in which the tape cassette has been completely loaded by driving the discharging motor, And a brake release slider for releasing a brake member from the brake. 3. The recording / reproducing apparatus according to claim 1, wherein the loading / unloading operation is performed almost simultaneously with a brake release operation of the reel base by the tape cassette loading / unloading motor.
A recording / reproducing apparatus, wherein a loading / unloading operation of a magnetic tape can be performed by an unloading motor.