JP2002042396A - Magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts by efficiently arranging a pinch roller and tape guide which move in their positions, in compliance with tape loading and by making their drive mechanisms common. SOLUTION: The magnetic recording and reproducing device, 1 which records or reproduces data to or from a magnetic tape by performing the tape loading to draw out the magnetic tape 22 by a tape guide block 6, having the tape guide 6a from a tape cassette 19 and to wind the tape to a rotary head drum 4, is disposed with the pinch roller 8 and the tape guide 10 near a tape reel 21 which is located nearest the winding side on one turning arm 23, such that both are driven and moved by a single drive mechanism. The tape guide is disposed on a projecting part 23c on the turning arm projected in a direction orthogonal with the traveling direction of the magnetic tape, when the pinch roller is brought into pressure contact with a capstan 9. The tape guide is positioned within an area so that the magnetic tape will not come into contact with the casing of a tape cassette, etc., during the pressure contact and release of the pressurized contact of the pinch roller 8 to and from the capstan of the turning arm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus which draws a magnetic tape from a tape cassette and winds the tape around a rotary head drum to record or reproduce data on the magnetic tape. A technology for efficiently arranging tape guides and reducing the number of parts.

[0002]

2. Description of the Related Art A magnetic recording / reproducing apparatus using a rotating head drum, such as a camera-integrated video tape recorder (VTR) or a stationary VTR, generally performs tape loading for pulling out a magnetic tape from a tape cassette and rotating. A so-called helical scan system is employed in which a tape is run by being wound around a rotating head drum arranged so that its axis is inclined, and data is recorded or reproduced on or from a magnetic tape.

In the magnetic recording / reproducing apparatus, a magnetic tape is drawn out of a tape cassette by a tape guide or the like moving in a horizontal direction, and is wound around a rotary head drum. The magnetic tape pulled out from the take-up reel is sandwiched between the pinch roller and the capstan by being pressed, and the tape path defined by the plurality of tape guides, the pinch roller, the capstan, and the like. Follow along. Then, when traveling along the tape path, the magnetic tape is set to have a predetermined relative speed with respect to the magnetic head by the pinch roller and the capstan,
Finally, it is wound on a take-up reel.

In a conventional magnetic recording / reproducing apparatus a, as shown in FIG. 10, a pair of tape guide blocks having a tape guide and guide posts (not shown) arranged on a mechanical deck b are arranged in a horizontal direction. The magnetic tape c pulled out of the tape cassette by the movement is
The tape is wound around the rotating head drum and travels along a tape path defined by other tape guides, pinch rollers d, capstans e, and the like.

[0005] The pinch roller d is mounted on a pinch arm f that rotates in conjunction with a tape guide block or the like during tape loading. Similarly, the pinch roller d is wound up more than the pinch roller d and the capstan e on the tape path. A tape guide (hereinafter, referred to as a final guide) g located on the reel side is also mounted on the guide arm h, and each is driven by the drive mechanisms i and j, and rotates in conjunction with the operation of the tape guide block and the like during tape loading. Was supposed to.

However, in the conventional magnetic recording / reproducing apparatus a, the pinch roller d and the final guide g are separately mounted on the pinch arm f and the guide arm h, respectively, and have different drive mechanisms i and j. Drive mechanism such as a cam mechanism is required separately, and space efficiency is deteriorated and the number of parts is increased.

[0007]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention efficiently arranges a pinch roller and a tape guide whose positions move in accordance with tape loading, and shares these drive mechanisms. Another object is to reduce the number of parts.

[0008]

In order to solve the above-mentioned problems, a magnetic recording / reproducing apparatus according to the present invention comprises a pinch roller and a tape guide closest to a tape reel on the winding side arranged on one rotating arm. Then, both are driven by one drive mechanism to move, and the tape guide is provided on a rotating arm projecting in a direction perpendicular to the running direction of the magnetic tape when the pinch roller is pressed against the capstan. The magnetic tape is arranged in the protruding portion and is always positioned in an area where the magnetic tape does not come into contact with the housing or the like of the tape cassette when the pinch roller is pressed against the capstan and when the pinch roller is released.

Therefore, by using a common drive mechanism for the pinch roller and the tape guide, the number of components can be reduced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the magnetic recording / reproducing apparatus according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the magnetic recording / reproducing apparatus 1 has a base chassis 2 on which necessary components and members described later are mounted.

Hereinafter, the configuration of the magnetic recording and reproducing apparatus 1 will be described.

As shown in FIGS. 1 to 3, a cassette holder 3 for holding a tape cassette and moving it from an insertion or ejection position to a loading position, a rotary head drum 4, and a linear skate chassis 5, as shown in FIGS. ,
A pair of tape guide blocks 6, 6, a tape guide 7,
A pinch roller 8, a capstan 9, another tape guide 10, a drive mechanism 11 for moving the linear skate chassis 5 and the tape guide blocks 6, 6; The take-up side reel bases 12, 13 and the like are mounted.

The rotary head drum 4 is disposed in the back portion of the base chassis 2 with its rotary shaft inclined.
It is equipped with a plurality of magnetic heads not shown,
The recording and reproduction of the data signal on the magnetic tape are performed by the rotating magnetic head.

When the tape cassette is loaded, the linear skate chassis 5 moves horizontally in the direction of the rotary head drum 4, and arranges the tape cassette loaded by the cassette holder 3 at a position close to the rotary head drum 4. It is. A linear skate cam plate 5a for receiving the transmission of the driving force by the driving mechanism 7 is fixed to the bottom surface of the linear skate chassis 5 by an appropriate means such as a screw.

Each of the tape guide blocks 6, 6 has a tape guide 6a and a guide post 6b, and extends along guide grooves 14a, 14a of the guide rails 14, 14 as shown in FIGS. And a position close to both sides of the rotary head drum 4 in the back of the base chassis 2 and in the vicinity of the base chassis 2 so as to be movable in the horizontal direction.

As shown in FIG. 1, the drive mechanism 11 includes a motor 15, and a drive gear group 16 for sequentially transmitting the rotation of the motor 15 while decelerating the rotation. The linear skate chassis 5 and the tape guide blocks 6, 6 Are driven to perform specific movements.

Accordingly, when the motor 15 rotates, the driving force is transmitted to the linear skate cam plate 5a through the driving gear group 16 to move the linear skate chassis 5 in the horizontal direction, and the tape cassette held by the cassette holder 3 is moved. Can be moved to a position close to the rotary head drum 4 or separated therefrom. When the linear skate chassis 5 on which the tape cassette is mounted moves to the side close to the rotary head drum 4, the rotary head drum 4 is actually positioned so as to enter the mouth of the tape cassette.

As shown in FIGS. 4 to 6, a rack gear provided at the front end of the linear skate cam plate 5a meshes with the tape guide gears 17, 17, and the tape guide gears 17 move as the linear skate chassis 5 moves. Gear 17, 17
Is to be rotated.

The tape guide gears 17, 17 have one end of a tape guide arm 18, 18 formed by connecting two members in a center-folding manner at substantially the center, and is supported and fixed as a pivot point. Further, the tape guide arms 18, 18
Tape guide blocks 6, 6 are attached to the other end portions, respectively, so as to sandwich the guide rails 14, 14 therebetween.

The tape guide gears 17 and 17 incorporate a torsion coil spring (not shown) so as to constantly apply an urging force to rotate the tape guide gears 17 and 17 in a specific direction. Incidentally, the gear teeth are not formed over the entire circumference of the tape guide gears 12 and 12, and the gear teeth are formed over a range of about 120 degrees in accordance with the length of the rack gear of the linear skate cam plate 5a. Is formed.

The tape loading in the magnetic recording / reproducing apparatus 1 is performed between the reel (S reel) 20 on the supply side and the reel (T reel) 21 on the winding side from the tape cassette 19 by the tape guide blocks 6 and 6. This is performed by pulling out the magnetic tape 22 stretched over the tape.

At the time of tape loading, as the tape guide blocks 6, 6 move, the S reel 20
The tape guide (hereinafter, referred to as an entrance guide) 7, the pinch roller 8, and the tape guide (hereinafter, referred to as a final guide) 10 on the T-reel 21 also move in the horizontal direction, and as shown in FIGS. Magnetic tape 22 drawn from
Are pinched between the pinch roller 8 and the capstan 9 by pressure bonding, and the entrance guide 7, the tape guide 6a of the tape guide blocks 6, 6, the guide post 6b, the guide post 6b, the tape The tape travels along a tape path defined by the guide 6 a, the pinch roller 8, the capstan 9, and the final guide 10, and is wound on a T reel 21. When the magnetic tape 22 travels along the tape path, the magnetic tape 22 is nipped by the pinch roller 8 and the capstan 9 and is sent out at a predetermined speed, so that the magnetic tape 22 The relative speed of

As shown in FIGS. 7 and 8, both the pinch roller 8 and the final guide 10 are erected on one end 23a side of a rotating arm (hereinafter, pinch arm) 23 having a substantially arcuate shape. Have been. Also, the pinch arm 23
Is rotatably supported on the other end 23b side.

The relative positional relationship between the pinch roller 8 and the final guide 10 on the pinch arm 23 is determined when the final guide 10 is pressed against the pinch roller 8 and the capstan 9 and between the pinch roller 8 and the capstan 9. 2 and 3, a position defining a tape path that does not impose excessively on the running of the magnetic tape 22, i.e., a tape guide disposition line 24 shown by a two-dot line in FIGS. It is set to be between 25. The position of the final guide 10 is the line 2 where the tape guide can be arranged.
For example, when the magnetic tape 22 runs on the tape path, it does not adversely affect the tape running by touching the cassette shell of the tape cassette 19 when the magnetic tape 22 runs on the tape path.

As shown in FIG. 9, a pinch arm 23 supporting the pinch roller 8 and the final guide 10 shares a rotation fulcrum 27 with a limiter arm 26, and has one end 26a of the limiter arm 26 and a driving cam 28. Is pin 2
9 are connected. Furthermore, limiter arm 2
A coil spring 30 is bridged between the other end 26 b of the sixth arm 6 and a substantially middle part of the pinch arm 23.

As shown in FIG. 8, when the drive cam 28 is moved in the direction of the arrow 31 by an appropriate drive mechanism (not shown), the limiter arm 26 and the pinch arm 2 are moved.
3 moves in the direction of arrow 32 in conjunction with
Is pressed against the capstan 9. In this state, the position of the final guide 10 is the tape guide arrangable line 24,
It is located between 25.

When the pinch roller 8 shown in FIG. 3 is not pressed against the capstan 9, the pinch arm 23 is always pulled in the direction of the arrow 32 by the urging force of the coil spring 30.
6c is in contact with the pinch arm 23, so that an arrow 3
Unnecessary movement in two directions is suppressed. Also in this state, the position of the final guide 10 is located between the tape guide arrangeable lines 24 and 25.

The coil spring 30 has a function of adjusting the pressing pressure when the pinch roller 8 is pressed against the capstan 9 and also adjusting the tape tension of the magnetic tape 22 running on the tape path.

When the pinch roller 8 is pressed against the capstan 9, the pinch arm 26 is deformed, and the inclination of the final guide 10 changes.

Therefore, the inclination of the final guide 10 is previously shifted from the normal inclination so that the inclination of the final guide 10 is correct when the pinch roller 8 is pressed against the capstan 9. Therefore, the shape of the pinch arm 23 is changed so that the portion 23c where the final guide 10 is erected as shown in FIGS. 7 to 9 so that only the inclination of the final guide 10 can be shifted and adjusted. Independently of the portion where the pinch roller 8 is erected, the pinch roller 8 has a substantially peninsula shape and a protruding shape. Final Guide 1 above
The shift of the inclination of 0 is performed, for example, by bending the protruding portion 23c in an appropriate direction at a portion of the pinch arm 23 indicated by a dashed line in FIG.

The direction in which the inclination of the final guide 10 is shifted is opposite to the direction in which the final guide 10 falls when the pinch roller 8 is pressed against the capstan 9, that is, the direction in which the inclination of the final guide 10 is shifted.
This is the direction of the arrow 33 shown in FIG. Therefore, the protruding portion 23c of the pinch arm 23 on which the final guide 10 is erected
When the pinch roller 8 is pressed against the capstan 9, the pinch roller 8 is formed so as to project in a direction (Ao direction in FIG. 8) intersecting the traveling direction of the magnetic tape 22 at a right angle. The Ao direction is a direction in which the inclination of the final guide 10 has the greatest effect on the running of the magnetic tape 22.

The tape loading in the magnetic recording / reproducing apparatus 1 having the above configuration is performed as follows.

When the tape cassette 19 is loaded and the linear skate chassis 5 moves in the horizontal direction, the tape guide gears 17 and 17 rotate, and the tape guide arms 18 and 18 rotate with this rotation to load the tape. 4 showing the start state of the tape loading, FIG. 5 showing the state in the middle of the tape loading, and FIG. 6 showing the tape loading completed state.
Initially, the tape guide 7 and the pinch roller 8
The tape guide blocks 6, 6, which were located in the mouth portion of the tape cassette 19 together with the final guide 10 and the final guide 10, along the guide grooves 14a, 14a of the guide rails 14, 14,
The magnetic tape 22 is moved in a direction approaching the rotary head drum 4, and the magnetic tape 22 hooked on the tape guide 6 a and the guide post 6 b of each tape guide block 6 is wound around the rotary head drum 4.

Then, in conjunction with the movement of the tape guide blocks 6 and 6, the tape guide 7 and the pinch roller 8 and the final guide 10 mounted on the pinch arm 23 move from the mouth of the tape cassette 19, as shown in FIG. 7 is released. Next, when the magnetic recording / reproducing apparatus 1 enters the recording or reproducing state, the pinch arm 2
3 further rotates, and the pinch roller 8 moves the capstan 9
To the magnetic tape 22 during recording or reproduction.
Is started.

When the pinch roller 8 shown in FIG. 3 is released from the pressure contact with the capstan 9, reproduction and the like are also performed while fast-forwarding in both directions.

As described above, in the magnetic recording / reproducing apparatus 1, the pinch roller 8 and the final guide 10 of the plurality of tape guides are arranged on the pinch arm 23, and the final guide 10 is When the magnetic tape 22 is pressed against the capstan 9 and when the magnetic tape 22 is released, the magnetic tape 22 is always located within the area limited by the tape guide allocable lines 24 and 25. Can be eliminated. Further, these components can be efficiently arranged in the space between the pinch roller 8, the capstan 9, the final guide 10, and the T reel (reel base 13).

Further, the capstan 9 of the pinch roller 8
Since the drive mechanism for performing the pressure bonding or the pressure release to the motor and the drive mechanism for driving the final guide 10 can be shared by one, the number of parts can be reduced.

Further, the mounting inclination of the final guide 10 on the pinch arm 23 is adjusted so that the inclination of the final guide 10 is not changed by the pressing of the pinch roller 8 to the capstan 9 and the running of the magnetic tape 22 is adversely affected. The shape of the pinch arm 23 is devised so that the corner can be adjusted in advance so that the pinch roller 8 can be properly adjusted in a state where the pinch roller 8 is pressed against the capstan 9 in advance.

It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples for embodying the present invention, and the technical features of the present invention will be described below. The scope should not be construed as limiting.

[0041]

As described above, the magnetic recording / reproducing apparatus according to the present invention performs the tape loading in which the magnetic tape is pulled out from the tape cassette by the tape guide block having the tape guide and wound around the rotating head drum, and the data is written on the magnetic tape. A magnetic recording / reproducing apparatus for performing recording or reproduction of a magnetic recording / reproducing apparatus, wherein a pinch roller and a tape guide closest to a tape reel on the winding side are arranged on one rotating arm, and both are driven by one driving mechanism. The tape guide is disposed on a protruding portion on a rotating arm that protrudes in a direction perpendicular to the running direction of the magnetic tape when the pinch roller is pressed against the capstan, and is always rotated. When the pinch roller is pressed against the moving arm capstan and when the pinch roller is released, the magnetic tape The pitch roller and the tape guide are driven by a single drive mechanism because they are located in an area where they do not come into contact with the body, etc., and the number of components can be reduced, and the running of the magnetic tape is adversely affected. Never give.

According to the second aspect of the present invention, the projecting portion of the rotary arm on which the tape guide is provided is adjusted so that the tape guide is properly inclined when the pinch roller is pressed against the capstan. Since the rotating arm is bent in the direction opposite to the direction of deformation of the rotating arm in advance during manufacture, the tape guide is correctly tilted when the magnetic tape runs, so that smooth running can be realized. .

[Brief description of the drawings]

FIG. 1 shows an embodiment of the magnetic recording / reproducing apparatus of the present invention together with FIGS. 2 to 9, which is a perspective view schematically showing the configuration of each part of the magnetic recording / reproducing apparatus when a tape cassette is loaded. FIG.

FIG. 2 is a plan view schematically showing a state when a pinch roller and a capstan are pressure-bonded.

FIG. 3 is a plan view schematically showing a state in which pressure bonding between a pinch roller and a capstan is released.

FIG. 4 shows the operation of each part at the time of tape loading together with FIGS. 5 and 6, and FIG. 4 is a plan view showing the state at the start of tape loading.

FIG. 5 is a plan view showing a state during tape loading.

FIG. 6 is a plan view showing a state at the time of tape loading completion.

FIG. 7 is a perspective view of a main part.

FIG. 8 is a plan view of a rotating arm.

FIG. 9 is a plan view showing a rotating arm and a driving mechanism thereof.

FIG. 10 is a diagram schematically showing a pinch roller, a tape guide, and a driving mechanism thereof in a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magnetic recording / reproducing apparatus, 4 ... Rotating head drum, 6 ... Tape guide block, 6a ... Tape guide, 8 ... Pinch roller, 9 ... Capstan, 10 ... Tape guide, 1
9: tape cassette, 21: reel on the winding side, 22
... Magnetic tape, 23 ... Rotating arm, 23c ... Protrusion

Claims (2)

[Claims] 1. A magnetic recording / reproducing apparatus for recording / reproducing data on / from a magnetic tape by performing a tape loading operation in which a magnetic tape is pulled out from a tape cassette by a tape guide block having a tape guide and wound around a rotary head drum. An apparatus, comprising: a pinch roller and a tape guide closest to a tape reel on the most winding side disposed on one rotating arm, both of which are driven by one driving mechanism to move, and Is provided on the protrusion on the rotating arm that projects in a direction perpendicular to the running direction of the magnetic tape when the pinch roller is pressed against the capstan, and the rotating arm always contacts the capstan. The magnetic tape does not come into contact with the housing of the tape cassette when the pinch roller is pressed or released. Magnetic recording and reproducing apparatus characterized in that it adapted to be located in the area. 2. The projecting portion of the rotary arm on which the tape guide is provided is set in advance in the direction of deformation of the rotary arm during manufacturing so that the tape guide is correctly tilted when the pinch roller is pressed against the capstan. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the magnetic recording / reproducing apparatus is bent in a direction opposite to the direction described above.