JPH0729247A - Recording and preproducing device - Google Patents

Abstract

PURPOSE:To apply adequate torque on reel base and to miniaturize the device which permits use of large and small tape cassettes and operates the reel base with existing motors by providing the gear of the device with a brake mechanism. CONSTITUTION:The oscillation fulcrum gear 17 on a tape supply side is freely rotatably born coaxially with a fulcrum shaft 5 on a mechanical deck section 4 and is meshed with a gear 11 on the reel base 7. The lower part of the gear 17 is provided with a brake drum 19 of the diameter smaller than the diameter of the gear. A brake and 32, fixed at one end of the mechanical deck part and at the other end to a bearing shaft 28 of a tension regulator arm 27, is brought into pressurized contact with the brake drum 19 of the gear 17. The tape T is brought into elastic contact with a tension regulator pin 29 of the arm 27 and the tension thereon is controlled by turning of the arm 27 and pressurized contact of the band 32 and the drum 19. The size, weight and cost of the device and reduced by the mechanism of adequately adjusting the rotation torque applied on the steel base 7, 8 in such a manner.

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, and more specifically, it is possible to mount two different size tape cassettes having different intervals between a supply-side tape reel and a winding-side tape reel. In a recording / reproducing apparatus in which two reel stands, which are engaged with one tape reel separately, are moved at two positions, a swing mechanism that swings the reel stand is provided with a brake mechanism, a clutch mechanism, and a one-way mechanism. The present invention aims to provide a recording / reproducing device.

[0002]

2. Description of the Related Art Conventionally, two different size tape cassettes having different intervals between a supply-side tape reel and a take-up-side tape reel can be mounted, and two reel bases that engage with the tape reel are provided at two positions. There is a recording / reproducing device which is adapted to move. Since both reel stands are moved in two positions, each reel stand has its own motor.

[0003]

However, in the case where each reel base is provided with a dedicated motor as in the conventional recording / reproducing apparatus, there is a problem that the size and weight of the member supporting the reel base increases. .

Alternatively, when two reel stands are driven by one reel stand motor or indirectly driven by using the power of another motor, the torque applied to each reel stand is appropriately adjusted. However, the detection of the rotation of the reel stand causes a problem that the mechanism becomes complicated because the reel stand moves.

The present invention has been made in order to solve the above-mentioned problems, and the reel stand can be operated by an existing motor such as a capstan motor without using a dedicated motor for the reel stand. Appropriate torque applied to the table,
The rotation of the reel stand can be easily detected, and the size and weight can be reduced.
An object of the present invention is to obtain a recording / reproducing device that can reduce the cost.

[0006]

In order to achieve the above-mentioned object, a recording / reproducing apparatus according to a first aspect of the present invention has two supply tape reels and two winding tape reels having different intervals. Tape cassettes of different sizes can be installed, and two tape reels can be individually engaged 2
A recording / reproducing apparatus in which one reel stand is moved at two positions, and the reel stand is moved by rotating around a fulcrum shaft provided in a mechanical deck section.
A swing fulcrum gear is provided coaxially with the fulcrum shaft, and has a mechanism that meshes with a reel base gear provided on the reel base.
Alternatively, a brake mechanism for controlling the rotational torque of the tape reel base is provided on one of the gears on the side of the swing fulcrum gear opposite the reel base gear.

Further, in the recording / reproducing apparatus according to the second aspect of the present invention, one of the swing fulcrum gear or the gear train on the side of the reel base gear opposite the swing fulcrum gear is fixed to the tape in the tape pass state. It is provided with a clutch mechanism for applying the tape tension.

Further, in the recording / reproducing apparatus according to the third aspect of the present invention, the one-way mechanism is provided in one of the swing fulcrum gear or the gear train on the side opposite to the swing fulcrum gear on the reel base gear side. is there.

[0009]

According to the first aspect of the present invention configured as described above.
In the recording / reproducing apparatus described above, the movement of the two reel bases can be moved by meshing with the swinging fulcrum gear supported on the fulcrum shaft provided in the mechanical deck by the drive source of the existing motor. Then, by providing a brake mechanism on one of the swing fulcrum gear, a gear provided coaxially with the swing fulcrum gear, or a gear in the gear train on the anti-reel base gear side of the swing fulcrum gear, a tape is provided. The rotation torque of the reel stand can be controlled.

Further, in the recording / reproducing apparatus according to the second aspect of the present invention, the clutch mechanism is provided in one of the swing fulcrum gear or the gear of the gear train on the side opposite to the swing fulcrum gear on the reel base gear side. It is possible to give a constant tape tension to the tape in the tape pass state.

Further, in the recording / reproducing apparatus according to the third aspect of the present invention, the one-way mechanism is provided in one of the swing fulcrum gear or the gear of the gear train on the side opposite to the swing fulcrum gear on the reel base gear side. , The tape rewinding operation and the foreheading operation can be appropriately performed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording / reproducing apparatus according to the present invention will be described below with reference to the illustrated embodiments. 1 is a plan view of the recording / reproducing apparatus of the present example in which a large tape cassette is mounted, in a tape pass state, and FIG. 2 is a plan view of the recording / reproducing apparatus of the present example in which a small tape cassette is mounted, in a tape path state.

In both figures, C shows a large tape cassette in phantom lines, and c shows a small tape cassette in phantom lines. 1
Shows an entire video tape recorder (VTR), which is a so-called compatible type which can use two types of tape cassettes C and c of large and small.

2 and 3 are reel base holding members, and one end of each reel base holding member 2 and 3 is a mechanical deck unit 4.
It is rotatably supported by fulcrum shafts 5 and 6 provided on the. The reel bases 7 and 8 are rotatably supported on the other ends of the reel base holding members 2 and 3. Reference numerals 9 and 10 denote reel engagement shafts projecting from the centers of the reel stands 7 and 8. Further, the reel stand upper gears 11 and 1 are provided on the lower surfaces of the reel stands 7 and 8.
2. The reel base gears 13 and 14 are integrally provided.

The reel base holding members 2 and 3 are rotated around the fulcrum shafts 5 and 6 described above with respect to the position of the small tape cassette c shown in FIG. 2 and the position of the large tape cassette C shown in FIG. When the small tape cassette c is located, the axial distance between the reel bases 7 and 8 is equal to the axial distance between the tape reels 15 and 15a of the small tape cassette c, and when the large tape cassette C is located, the reel is reeled. The axial distance between the stands 7 and 8 is equal to the axial distance between the tape reels 16 and 16a of the large tape cassette C.

Further, 17 is a swinging fulcrum gear on the tape supply side, 18 is a swinging fulcrum gear on the tape winding side, and both swinging fulcrum gears 17 and 18 are fulcrums of the reel base holding members 2 and 3, respectively. It is rotatably supported coaxially with the shafts 5 and 6, and can be used both when using the large tape cassette C and when using the small tape cassette c.
It always meshes with the reel stand upper gears 11 and 12 of the reel stand 7 and 8.

Further, below the swing fulcrum gear 17 on the tape supply side, the brake drum 1 having a diameter smaller than the gear diameter is provided.
9 is provided.

Reference numeral 20 denotes a head drum provided in the central portion on the back side of the mechanical deck unit 4, which comprises a fixed drum and a rotary drum, and a magnetic head (not shown) is supported on the rotary drum. Reference numerals 21 and 21a denote tape loading blocks, each of which has a loading guide 22, 22a and an inclined guide 23, 23a. Reference numeral 24 is a capstan rotated by a capstan motor 25, and 26 is a pinch roller.

FIG. 3 shows a plan view of the periphery of the swing fulcrum gear 17 on the tape supply side. In the figure, reference numeral 27 denotes a tension regulator arm (hereinafter referred to as a "ten-leg arm") which constitutes a tension regulator mechanism, and a position near one end of the tension regulator arm rotates in the direction of arrow ee 'with a bearing shaft 28 provided on the mechanical deck portion 4 as a fulcrum. It is movably supported.
Further, a tenon pin 29 is provided on the other end of the tenon arm 27.

The tension arm 27 is biased by a spring means (not shown) in the direction of arrow e, and in the tape pass state, the tape reel 16a on the supply side of the large tape cassette C and the tape reel on the supply side of the small tape cassette c. The tape T and the tape t pulled out from 16 are elastically contacted from the inside of the ten pin pin 29 via the guide post 30.

The tapes T and t elastically contacted with the ten pin 29 are wound around the head drum 20 from the loading guide 22 on the inlet side through the inclined guide 23, and from here the inclined guide 23a on the outlet side and the loading guide 22a.
Then, it is taken up by the tape reel 16a on the take-up side via the capstan 24, the pinch roller 26, and the guide post 31.

Reference numeral 32 denotes a brake band which constitutes a brake mechanism, one end of which is fixed to a support portion 33 provided on the mechanical deck portion 4, and the other end thereof is fixed to a support portion 28 of the tension arm 27. The brake band 32 is pressed against the brake drum 19 of the swing fulcrum gear 17 on the supply side via the pad 32a.

Here, when the tension of the tape pulled out from the tape reel on the supply side becomes small, the ten-leg arm 27 is rotated in the direction of arrow e by the spring means (not shown), and the supporting portion 28 thereof is moved from the swing fulcrum gear 17 on the supply side. As it moves farther, the brake band 34 strongly presses against the brake drum 19, thereby increasing the tension of the tape.

When the tension of the tape pulled out from the tape reel on the supply side increases, the ten-leg arm 27 rotates in the direction of arrow e'against the spring means (not shown), and the support portion 28 swings on the supply side. Since the brake band 32 moves closer to the fulcrum gear 17, the pressing force of the brake band 32 against the brake drum 32 is weakened, and thereby the tape tension is reduced.

Since the brake band 32 is hung on the brake drum 19 without moving when the large tape cassette C is used or when the small tape cassette c is used, the tension applied to the tapes T and t is therefore increased. Can be the same.

Reference numeral 33 is a swing arm, and a swing fulcrum gear 34 supported at one end of the swing arm is attached to the mechanical deck portion 4 by a shaft 35.
Thus, the swinging gear 36 is rotatably supported on the other end by a shaft 37, and the swinging fulcrum gear 34 and the swinging gear 36 are meshed with each other. Further, a friction member is interposed between the swing fulcrum gear 34 and the swing arm 33.

As a method of driving the swing fulcrum gear 34,
A magnetic recording device using a tape cassette may be one that obtains power from a capstan motor through a belt or the like, or one that has a dedicated motor, as in many examples.

The operation of the swinging gear 34 is such that when the swinging fulcrum gear 34 rotates, the swinging arm 33 rotates in a direction corresponding to the rotation direction of the swinging fulcrum gear 34 due to friction with the swinging arm 33. To do. When the oscillating fulcrum gear 34 rotates, the oscillating fulcrum gear 36 meshing therewith rotates, and accordingly, when the oscillating fulcrum gear 34 rotates counterclockwise, the oscillating gear 36 rotates clockwise. And rotate,
Rotation of the swing arm 36 in the counterclockwise direction engages with the reel lower gear 13 of the reel table 7 to rotate the reel table 7 in the counterclockwise direction.

When the oscillating fulcrum gear 34 rotates clockwise, the oscillating gear 36 rotates counterclockwise, and the clockwise rotation of the oscillating arm 33 causes the reel mount to rotate. The reel under gear 14 of No. 8 is rotated, whereby the reel base 8 is rotated in the clockwise direction.

Reference numeral 38 denotes a ratchet member provided on the swing fulcrum gear 17 on the supply side, and the arrow f-
The ratchet member 38 is rotatably supported in the mechanical deck portion 4 in the f'direction, and a tension coil spring 40 is hooked on one end 38a of the ratchet member 38 and biased in the arrow f direction. The other end of the ratchet member 38 is a claw portion 41, and when the ratchet member 37 rotates in the f ′ direction, the claw portion 41 meshes with the tooth portion 17 a of the swing fulcrum gear gear 17 on the supply side, and the claw portion 41 moves. Due to the shape, the swing fulcrum gear 17 has an arrow g
It cannot rotate in the direction. Further, when the swing fulcrum gear 17 rotates in the direction of the arrow g ′, the ratchet mechanism is formed, and the claw portion 41 resists the force of the spring 40 and the claw portion 41 moves.
While being pushed by the tooth portion 17a of No. 7, it is capable of overcoming rotation and constitutes a so-called ratchet wheel.

Further, a pin 42 is provided at the outer end of the claw portion 41, and depending on the usage mode of the mechanical deck portion,
It is moved against the force of the spring 40 in the direction of arrow f ′ by a mode slider (not shown) provided in the mechanical deck,
The claw portion 41 is moved in the direction of the arrow f ′ and separated from the tooth portion 17a of the swing fulcrum gear 17 on the supply side, so that the ratchet member is released regardless of the rotation direction of the swing fulcrum gear 17.

In FIG. 4, reference numeral 43 denotes a clutch mechanism provided on the swing fulcrum gear 18 on the winding side, which is a magnetic limiter mechanism. Swing fulcrum gear 1 on the winding side
A limiter gear 44 is provided in the lower part of 8 coaxially with the fulcrum shaft 6, and a hysteresis plate 45 provided on the back surface of the swing fulcrum gear 18
And a magnet 46 provided on the limiter gear 44,
An appropriate torque is transmitted between the swing fulcrum gear 18 and the limiter gear 44 by a magnetic limiter mechanism constituted by the back yoke 47.

In FIG. 5, reference numeral 48 denotes a one-way mechanism provided on the swinging fulcrum gear 18 on the winding side, which comprises a one-way gear 49 and a one-way member 50 which mesh with the swinging fulcrum gear 18 on the winding side. The one-way member 50 is rotatably supported by the support shaft 49 a of the one-way gear 49 and has a spring portion 51 for generating a frictional force with the one-way gear 49.

When the one-way gear 49 rotates in the direction of arrow h-h ', the one-way member 50 is also given a force of rotating in the direction of arrow h-h' by the one-way gear 49 due to the friction generated in the spring portion 51. . Also, the spring portion 5
A claw portion 52 is formed on the side opposite to 1 at the same height as the tooth portion of the limiter gear 44, and is rotated integrally with the rotation of the one-way member 50. The one-way gear 49 is rotated by the limiter gear 44, and the limiter gear 44 is rotated by the winding-side swing fulcrum gear 18. Therefore, the one-way member 50 is rotated by the rotation direction of the winding-side swing fulcrum gear 18. The direction is determined.

The operation of the one-way mechanism described above will now be described with reference to FIGS.
, The tape T is taken up from the take-up side tape reel 16a to the supply-side tape reel 16.
When the tape is run in the so-called rewind direction, the take-up side tape reel 16a rotates counterclockwise, so that the take-up side swing fulcrum gear 18 meshing with the reel stand gear 12 turns in the direction of arrow i. The limiter gear 44 provided coaxially therewith also rotates in the direction of arrow i, and the one-way gear 49 meshing with the limiter gear 44 is indicated by arrow h.
Rotate in the direction. At this time, the one-way member 50 rotates in the direction of arrow h, the claw portion 52 meshes with the teeth of the limiter gear 44, and the limiter gear 44 cannot rotate any more and stops (see FIG. 5a). For this reason, slippage occurs between the swing fulcrum gear 18 on the winding side and the limiter gear 44, and the magnetic clutch mechanism 43 described above applies tension to the tape T and an appropriate brake torque is applied to the winding side. The fulcrum fulcrum gear 18 of FIG.

On the other hand, the tape T is the supply side tape reel 16
When the tape is wound in the so-called forward direction from the take-up side tape reel 16a, the take-up side tape reel 16a rotates in the clockwise direction. Dynamic fulcrum gear 18
Rotates in the direction of arrow i ', the limiter gear 44 provided coaxially therewith also rotates in the direction of arrow i', and the one-way gear 49 meshing with the saw limiter gear 44 rotates in the direction of arrow h '. At this time, the one-way member 50 rotates in the direction of the arrow h ', the claw portion 52 separates from the teeth of the limiter gear 44, and rotates to the position of a stopper (not shown) and stops (see FIG. 5b). Therefore, the swing fulcrum gear 18 and the limiter gear 44 on the winding side do not slip, and the tape T can be wound around the supply-side tape reel 16 without loss of torque.

The clutch mechanism for applying the brake torque to the swing fulcrum gear 18 on the take-up side may be other than the magnetic type, and the one-way mechanism 48 may be engaged or disengaged from the limiter gear 44 by the claw portion. Any mechanism having a similar function may be used.

The rotation detection of the tape reel will be described with reference to the swing-side fulcrum gear 18 on the winding side shown in FIG. 4, as an example. The reflection type photo interrupter 53 and the reflection label 5 are described.
Performed by 4. The reflection label 54 is attached to the lower surface of the swing fulcrum gear 18, and the photo interrupter 53 on the mechanical deck unit detects the rotation of the swing fulcrum gear 18. Here, since the rocking fulcrum gear 18 meshes with the reel base upper gear 12, the rotation of the reel bases 7 and 8 is at a dedicated position for each of the large tape cassette C and the small tape cassette c. Therefore, it is possible to know with one pair of sensors without using two pairs of sensors.

Further, since the clutch mechanism 34 is provided between the swing fulcrum gear 18 on the winding side and the limiter gear 44, the clutch mechanism 34 is a reel mount as used in a conventional VTR of, for example, 8 mm system. Unlike the type that absorbs the difference in rotation, even if the reel base moves, it is possible to know the exact rotation.

As another embodiment, as shown in FIG. 6, the swing fulcrum gears 17 and 18 are engaged with the driven gears 55 and 56, and the driven gears 55 and 56 are engaged with the swing gear 36. A mechanical deck having such a configuration or a configuration in which the swing gear 36 meshes with a gear train (not shown) that meshes with the driven gears 55 and 56 is also conceivable. Therefore, in such a case, the balance mechanism, the clutch mechanism, and the one-way mechanism have the swing fulcrum gears 17, 18 or the driven gears 55,
56 or gear train.

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

[0042]

As described above, in the recording / reproducing apparatus according to the present invention, the reel base is moved by rotating around the fulcrum shaft provided on the mechanical deck portion, and is provided coaxially with the fulcrum shaft. It has a mechanism in which the swing fulcrum gear is meshed with a reel base gear provided on the reel base, and has a swing fulcrum gear, a gear provided coaxially with the swing fulcrum gear, or an anti-reel base of the swing fulcrum gear. A brake mechanism for controlling the rotation torque of the tape reel stand, a clutch mechanism for applying a constant tape tension to the tape in the tape pass state, and a one-way mechanism are provided for one of the gears on the gear side. When using an existing motor such as a capstan motor to drive the indirect reel drive that does not use a dedicated motor for each reel stand, the torque added to each reel stand It was suitably, it easy to detect the rotation of the reel stand, and downsizing, weight reduction, a novel recording and reproducing apparatus capable of reducing the cost can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a tape pass state of a recording / reproducing apparatus of this example in which a large tape cassette is mounted.

FIG. 2 is a plan view of a tape path state of the recording / reproducing apparatus of this example in which a small tape cassette is mounted.

FIG. 3 is an enlarged plan view around a swing fulcrum gear on the tape supply side.

FIG. 4 is a cross-sectional view of a swing fulcrum gear on the tape winding side and a clutch mechanism.

FIG. 5 is a plan view of a swing fulcrum gear on the tape winding side and a one-way mechanism.

FIG. 6 is a plan view of another embodiment of the recording / reproducing apparatus of this example.

[Explanation of symbols]

 1 VTR 2,3 Reel holding member 4 Mechanical deck 5,6 Support shaft 7,8 Reel stand 17,18 Swing support gear 19 Brake drum 20 Head drum 24 Capstan 27 Tenregi arm 28 Bearing shaft 32 Brake band 36 Swing gear 38 Ratchet member 43 Clutch mechanism 44 Limiter gear 45 His plate 46 Magnet 48 One-way mechanism 49 One-way gear 50 One-way member 51 Spring part 55, 56 Driven gear C Large tape cassette c Small tape cassette

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuji Akimoto 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Masaki Takase 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (4)

[Claims] 1. Two reels, each of which is capable of mounting two different size tape cassettes having different intervals between a supply-side tape reel and a take-up-side tape reel, and which engages with the two tape reels separately. A recording / reproducing apparatus in which a stand is moved in two positions, wherein the reel stand is moved by rotating around a fulcrum shaft provided in a mechanical deck section, and is provided coaxially with the fulcrum shaft. A mechanism for meshing a swing fulcrum gear with a reel base gear provided on the reel base, and the swing fulcrum gear, a gear coaxially provided with the swing fulcrum gear, or a swing fulcrum gear. A recording / reproducing apparatus, wherein a brake mechanism for controlling the rotation torque of the tape reel base is provided on one of the gears on the side of the gear opposite to the reel base. 2. Tape reels of two different sizes, each having a different interval between the supply-side tape reel and the take-up-side tape reel, can be mounted, and the two reels engage with the two tape reels separately. A recording / reproducing apparatus in which a stand is moved in two positions, wherein the reel stand is moved by rotating around a fulcrum shaft provided in a mechanical deck section, and is provided coaxially with the fulcrum shaft. And a mechanism for meshing the swing fulcrum gear with a reel base gear provided on the reel base. One of the above-mentioned swing fulcrum gear or a gear in the gear train on the side opposite to the swing fulcrum gear A recording / reproducing apparatus provided with a clutch mechanism for applying a constant tape tension to a tape in a tape pass state. 3. Two reels which can be loaded with two different size tape cassettes having different intervals between the supply-side tape reel and the take-up-side tape reel, and which engage with the two tape reels separately. A recording / reproducing apparatus in which a stand is moved in two positions, wherein the reel stand is moved by rotating around a fulcrum shaft provided in a mechanical deck section, and is provided coaxially with the fulcrum shaft. And a mechanism for meshing the swing fulcrum gear with a reel base gear provided on the reel base. One of the above-mentioned swing fulcrum gear or a gear in the gear train on the side opposite to the swing fulcrum gear A recording / reproducing apparatus having a one-way mechanism. 4. A tension regulator mechanism for adjusting the tension of the tape in a tape passing state is provided on one of the swing fulcrum gear or one of the gears on a side of the swing fulcrum gear opposite to the reel base gear. The recording / reproducing apparatus according to claim 1, wherein