JP3144079B2 - Magnetic recording / reproducing device - Google Patents

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 using a rotary head, and more particularly to a tape loading mechanism.

[0002]

2. Description of the Related Art A helical scan type magnetic recording / reproducing apparatus using a rotary head has a structure in which a magnetic tape is drawn from a tape cassette and wound around a rotary head drum, and the tape is run in this state. In recent years, in this magnetic recording / reproducing apparatus, in order to reduce the size of the mechanism in the depth direction, a linear skate chassis is provided, and during loading, the tape cassette is moved in a direction approaching the rotating head drum, and the front of the tape cassette is moved. There has been proposed a mechanism in which a rotary head drum is inserted into a concave pocket portion formed at the same time.

Conventionally, in this type of magnetic recording / reproducing apparatus, a tape loading mechanism for winding a magnetic tape around a rotary head drum is generally operated by a drive system independent of a linear skate chassis. That is, in the conventional system, the driving force from the motor is divided into two systems on the way, and one of the systems is used as a mechanism for moving the linear skate chassis, and the other is used as a mechanism for operating the tape loading mechanism.

[0004]

For this reason, the conventional magnetic recording / reproducing apparatus has a large number of parts, resulting in an increase in the weight of the apparatus and disadvantages in cost.
The present invention has been made to solve such a problem.

[0005]

In order to achieve the above object, the present invention is provided on a base chassis to which a rotary head drum is fixed, so as to be movable in a direction approaching / separating from the rotary head drum, A magnetic recording / reproducing apparatus having a linear skate chassis on which a tape cassette is mounted, and a tape loading mechanism for winding a magnetic tape of the tape cassette around a rotating head drum between a base chassis and the linear skate chassis. The tape loading mechanism includes a tape guide provided on a loading block movably mounted along a guide portion provided on the base chassis side, and a rotatable shaft supported on the base chassis side so as to be rotatable. Arm member rotated with the movement of the arm, and the arm member and loading And a connecting member for connecting the lock, the arm member is rotated with the movement of the linear skate chassis, and this operation is transmitted to the loading block via the connecting member, and the loading block is moved along the guide portion. When the tape guide is moved, the tape guide operates to pull out the magnetic tape and wind it around the rotary head drum.

[0006]

As described above, the tape loading mechanism is operated by utilizing the movement of the linear skate chassis for moving the tape cassette, so that the number of parts can be reduced and the weight and cost of the apparatus can be reduced accordingly. Becomes possible.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a drive mechanism of a so-called 8 mm VTR device as a magnetic recording / reproducing device.
This device is provided with a linear skate chassis that moves the tape cassette in a direction approaching the rotating head drum, with a view to miniaturizing the entire mechanism in the depth direction,
This is a mechanism in which the rotating head drum is inserted into the concave pocket portion at the front of the tape cassette when the loading is completed.

In FIG. 1, reference numeral 1 denotes a base chassis serving as a base of a drive mechanism of a magnetic recording / reproducing apparatus. The rotating head drum 2 is fixed. Further, fixed tape guides 3, 4, and 5 for guiding the tape during traveling are provided on the base chassis 1, and a capstan 6 for traveling the tape at a constant speed is provided.
Is protruding.

On the other hand, 7 shows a linear skate chassis,
The linear skate chassis 7 is the base chassis 1
The tape cassette 100 is supported on the linear skate chassis 7 so as to be linearly movable in a direction approaching / separating from the rotary head drum 2 along both side walls.
Is mounted and mounted. The tape cassette 100 mounted on the linear skate chassis 7 has a reel base 8 on which a supply reel 102 and a take-up reel 103 are rotatably supported on the linear skate chassis 7, respectively.
And 9 are engaged. The reel bases 8, 9 are driven to rotate by a motor (not shown).

The linear skate chassis 7 on which the tape cassette 100 is mounted is moved at a predetermined stroke by a moving mechanism configured between the linear skate chassis 7 and the base chassis 1. The structure of this moving mechanism will be described in detail. First, a motor 10 as a drive source is fixed to the base chassis 1, and the rotation of the drive shaft of the motor 10 is transmitted to the final stage through a plurality of reduction gear groups 11 to 15. Is transmitted to the operating gear 16. A pin 17 is provided at the peripheral end of the operating gear 16, while a receiving member 18 is fixed to the linear skate chassis 7 corresponding to the pin 17, and the moving direction of the linear skate chassis 7 is fixed to the receiving member 18. The pin 17 of the operating gear 16 is engaged with a groove 18a formed in a direction perpendicular to the direction. And motor 1
When the operating gear 16 is rotated by the driving of the
7 presses the inner edge of the groove 18 a of the receiving member 18, whereby the linear skate chassis 7 moves with respect to the base chassis 1.

The tape cassette 100 is mounted on the linear skate chassis 7 which is moved by the moving mechanism.
A movable member such as a tape guide 21 and 26 for pulling out the tape cartridge 1, a pinch roller 31 for pressing the tape 101 to the capstan 6, and a brake member for controlling rotation of both reels 102 and 103 of the tape cassette 100 is provided.

First, the tape guide will be described. A tape guide arm 19 is attached to the front left end of the linear skate chassis 7 so as to be rotatable around a shaft 20. One end of the tape guide arm 19 is attached to the tape guide arm. 21 is erected. On the other hand, an engagement pin 22 projects downward from the other end of the tape guide arm 19, and the engagement pin 22 is engaged with a cam groove 23 of a predetermined shape formed on the base chassis 1. . Symmetrically, a tape guide arm 24 is also attached to the front right end of the linear skate chassis 7 so as to be rotatable about a shaft 25. A tape guide 26 is provided upright at one end of the tape guide arm 24. Have been. On the other hand, an engagement pin 27 projects downward from the other end of the tape guide arm 24, and the engagement pin 27 is engaged with a cam groove 28 of a predetermined shape formed in the base chassis 1. .

Next, the pinch roller will be described.
A pinch roller arm 29 is attached to the front right end of the linear skate chassis 7 in the vicinity of the tape guide arm 24 so as to be rotatable about a shaft 30. One end of the pinch roller arm 29 is And the corresponding pinch roller 31 are rotatably supported. On the other hand, the other end of the pinch roller arm 29 is provided with an engagement pin 32 projecting downward.
2 is a cam groove 3 of a predetermined shape formed in the base chassis 1
3 is engaged.

To explain the brake member further, first, a brake arm 34 is mounted on the linear skate chassis 7 in the vicinity of the reel base 8 on the supply side so as to be rotatable around a shaft 35. A brake shoe 36 is provided at one end so as to face the peripheral surface of the reel base 8. On the other hand, an engagement pin 37 projects downward from the other end of the brake arm 34, and the engagement pin 37 is engaged with a cam groove 38 of a predetermined shape formed in the base chassis 1. In contrast to this, a brake arm 39 is attached to the take-up side of the linear skate chassis 7 in the vicinity of the reel stand 9 so as to be rotatable about a shaft 40. A brake claw 41 corresponding to the locking teeth 9a formed on the peripheral surface of the base 9 is provided. Also this brake arm 3
An engagement pin 42 projects downward from an end of the base 9. The engagement pin 42 is engaged with a cam groove 43 having a predetermined shape formed in the base chassis 1.

The tape guide arms 19 and 24,
Pinch roller arm 29, brake arms 34 and 39
The engaging pins 22 and 27, 32, 37, and 42 respectively pass through through holes formed in the linear skate chassis 7 and respectively have the cam grooves 23, 28, 33,
Although they are engaged with 38 and 43, illustration of this through hole is omitted in the drawing of this example.

A tape loading mechanism 44 for winding a tape around the rotary head drum 2 is provided between the base chassis 1 and the linear skate chassis 7. The tape loading mechanism 44 draws the tape 101 forward by tape guides 45 and 46, 47, 48, and 49 that are moved forward on both sides of the rotary head drum 2 and winds the tape 101 around the peripheral surface of the rotary head drum 2. Things.

The detailed structure of the tape loading mechanism 44 is shown in FIGS. In the figure, reference numeral 50 denotes a base block fixed to the base chassis 1. The base block 50 has a guide rail 51 on the left side of the rotary head drum 2 and a guide groove 52 and a guide rail 53 on the right side. The loading blocks 54, 55, and 56 are attached so as to be movable along these guide rails 51, guide grooves 52, and guide rails 53. Tape guides 45 and 46, 47, 48 and 49 are erected on these loading blocks 54, 55 and 56, respectively.

On the other hand, corresponding to this, a pair of left and right first arms 5 are provided on the lower surface of the front end of the linear skate chassis 7.
7 and 58 are mounted to be symmetrically rotatable about axes 59 and 60, respectively. The free ends of the first arms 57 and 58 are vertically bent upward to form locking pieces 57a and 58a, respectively.
7a and 58a project through the through holes 61 and 62 formed in the linear skate chassis 7 to the upper surface side, respectively, and a pressure spring 63 composed of a spiral spring wound in a planar spiral is provided between them. The first arms 57 and 58 are biased inward, that is, in directions approaching each other by the force of the compression spring 63, and the locking pieces 57a and 58a
It is pressed against the inner edges of 1 and 62.

Further, corresponding to the first arms 57 and 58, a pair of second arms 65 and 66 are pivotally supported on a support shaft 64 erected on the base chassis 1. The second arms 65 and 66 are connected to the first arms 57 and 58, respectively. That is, the second arms 65 and 66 have long holes 67 and 68 of a predetermined shape, respectively.
The pins 69 and 70 projecting from the first arms 57 and 58 are engaged with the long holes 67 and 68, respectively.

The free end of one second arm 65 and the loading block 54 are connected by a connecting arm 71, and the free end of the second arm 66 and the loading blocks 55 and 56 are connected by a connecting arm 7.
2, 73 and 74, and the second arm 65, 58 via the first arm 57, 58 with the movement of the linear skate chassis 7, as will be described in detail later.
66 is rotated and transmitted to the loading blocks 54, 55 and 56 via the connecting arms, whereby the tape loading operation is performed.

Next, the operation of the apparatus of this embodiment configured as described above will be described. The state shown in FIG. 1 is an eject mode, that is, in this mode, the linear skate chassis 7 is at a rearmost position far away from the rotary head drum 2, and at the rearmost position of the linear skate chassis 7, a tape cassette for a magnetic recording / reproducing apparatus is provided. 100 are taken in and out.

In this state, the tape guides 21 and 26 and the pinch roller 31 are all in the linear skate chassis 7.
The tape 101 is placed in a concave pocket at the front of the tape cassette 100 mounted thereon, that is, at a position corresponding to the back side of the tape 101 exposed so as to be stretched over the front surface of the tape cassette 100. The brake shoe 36 of the left brake arm 34 contacts the peripheral surface of the reel base 8 on the supply side, and applies a required frictional force to the reel base 8. On the other hand, the right brake arm 39 has the brake pawl 41 separated from the locking teeth 9a of the reel base 9 on the winding side. In the tape loading mechanism 44, the tape guides 45 and 46, 47, 48 and 49 all fit into the concave pockets at the front of the tape cassette 100, that is, correspond to the back side of the tape 101 exposed on the front of the tape cassette 100. It is in the position to be.

In this state, the motor 10 operates (the motor 10 operates when the tape cassette 100 is mounted on the linear skate chassis 7). When the tape cassette 100 is moved forward so as to be close to the tape cassette 100, the linear skate chassis 7 is temporarily stopped when the rotary head drum 2 enters a concave pocket portion at the front of the tape cassette 100. You. This state is the stop mode shown in FIG.

The tape guides 21 and 26 and the pinch roller 3 provided on the linear skate chassis 7 are moved by the forward movement of the linear skate chassis 7.
1. The movable members such as the brake arms 34 and 39 make predetermined movements according to the shape of the cam groove of the base chassis 1, respectively.

That is, the tape guides 21 and 26 have the engaging pins 22 and 27 respectively formed on the cam grooves 23 and 28 of the base chassis 1.
And the tape guide arms 19 and 24 are
By being rotated around 0 and 25, the tape cassette 100 moves outward and forward so as to pull out the tape 101 on the front surface of the tape cassette 100. In addition, the pinch roller 31 moves forward, that is, in a direction approaching the capstan 6 by the engagement pin 32 moving along the cam groove 33 and the pinch roller arm 29 being rotated about the shaft 30. The brake arm 34 rotates so that the brake shoe 36 is separated from the peripheral surface of the reel base 8 on the supply side by the movement of the engagement pin 37 along the cam groove 38, while the brake arm 39 is engaged. When the pin 42 is moved along the cam groove 43, the brake pawl 41 rotates so as to be engaged with the locking teeth 9 a of the reel base 9 on the winding side, thereby preventing the rotation of the winding reel 103. I do.

The tape loading mechanism 44 is operated by the forward movement of the linear skate chassis 7, that is, the tape 101 is wound around the rotary head drum 2 by the tape guides 45 and 46, 47, 48 and 49. The operation of the tape loading mechanism 44 will be described later in detail.

When the linear skate chassis 7 is further moved from the stop mode shown in FIG. 2 to the frontmost position, the recording / reproduction mode shown in FIG. 3 is entered.
When the linear skate chassis 7 is moved to the reproduction mode, the tape guides 21 and 26 move further outward to apply tension to the tape 101, and the pinch roller 31 holds the tape 101 between the capstans 6. Then, the brake arm 34 applies the required frictional force to the reel base 8 by the brake shoe 36 again contacting the peripheral surface of the reel base 8 on the supply side, while the brake arm 39 Is released from the locking teeth 9a of the take-up reel base 9, and the rotation regulation of the take-up reel 103 is released.

In this recording / reproducing mode, when the capstan 6 and the reel base 9 on the take-up side are driven to rotate, the tape 101 is moved from the supply side reel 102 to the tape guides 21 and 3 while maintaining an appropriate tension. , 4,4
5, 46 → rotating head drum 2 → tape guides 47, 4
8, 49, 5 → between the capstan 6 and the pinch roller 31 → pass through the tape guide 26 so as to be wound on the winding reel 103.

As described above, in the apparatus of the present embodiment, the tape guides 21 and 26, the pinch rollers 31, and the brake arms 34 and 39 are operated at various timings by moving the linear skate chassis 7 according to the mode transition. It is.

Next, the operation of the tape loading mechanism 44 will be described with reference to FIGS. When the linear skate chassis 7 is moved forward from the state at the rearmost position (FIG. 4), the first arms 57 and 5 are integrally moved.
8 moves, and furthermore, in conjunction with the movement of the first arms 57, 58, the second arms 65, 58 connected to the first arms 57, 58 via pins and slots.
66 is rotated so as to open symmetrically about the support shaft 64 (FIG. 5). Therefore, the loading blocks 54, 55 connected to the free ends of the second arms 65, 66 are provided.
And 56 move forward along the guide rail portion 51, the guide groove portion 52, and the guide rail portion 53, respectively, and the tape guides 45, 46, 47 on these loading blocks.
, And 48 and 49 operate so as to pull out the tape 101 forward and wind it around the rotating head drum 2.

When the linear skate chassis 7 is moved to the forefront position in the recording / reproducing mode (FIG. 6), the loading blocks 54, 55 and 56 are respectively connected to the guide rail 51, the guide groove 52 and the guide rail 53. And the tape 101 is wound around the rotary head drum 2 at a predetermined wrap angle (tape loading completed state).

In this state, the loading block 54,
55 and 56 are a guide rail portion 51 and a guide groove portion 5, respectively.
The linear skate chassis 7 is further advanced slightly in a state where the linear skate chassis 7 is abutted against the front end of the guide arm portion 2 and the guide rail portion 53.
The pin 58 is tilted and rotated so that the pins 69 and 70 move outward along the long holes 67 and 68 of the second arms 65 and 66 to open outwardly against the force of the pressure spring 63. That is, in this state, the pins 69, 70 of the first arms 57, 58 act so as to press the second arms 65, 66 forward by the force of the pressure spring 63, so that the loading blocks 54, 55 and 56 are respectively connected to the guide rail portions. 51, guide groove 52 and guide rail 5
3, the tape guides 45 and 46, 47, 48, and 49 are securely fixed and held in position. Note that a coil spring or the like can be used as the compression spring 63 for pressing the loading block. However, in the present embodiment, a spiral spring that is wound in a flat shape is used to reduce the thickness of the mechanism. ing.

[0033]

As is apparent from the structure described above, the magnetic recording / reproducing apparatus of the present invention has a structure in which the tape loading mechanism is operated by using the movement of the linear skate chassis for moving the tape cassette.
Since there is no need to provide a dedicated drive system for operating the tape loading mechanism as in the conventional magnetic recording / reproducing device, the number of components is greatly reduced compared to the conventional one, and as a result, the entire magnetic recording / reproducing device becomes This has the effect of reducing the weight and cost of the device.

[Brief description of the drawings]

FIG. 1 is a plan view of a magnetic recording / reproducing apparatus according to an embodiment in an eject mode.

FIG. 2 is a plan view of the magnetic recording / reproducing apparatus of the embodiment, in a state of a stop mode.

FIG. 3 is a plan view of a magnetic recording / reproducing apparatus according to an embodiment,
This is the state of the reproduction mode.

FIG. 4 is a plan view of the tape loading mechanism, showing a state before tape loading.

FIG. 5 is a plan view of the tape loading mechanism and shows a state during a tape loading operation.

FIG. 6 is a plan view of the tape loading mechanism, showing a tape loading completed state.

[Explanation of symbols]

1 ‥‥ Base chassis, 2 ‥‥ rotating head drum, 7 ‥
{Linear skate chassis, 44} Tape loading mechanism, 45, 46, 47, 48, 49 {Tape guide, 51, 53} Guide rail part (guide part), 52
{Guide groove portion (guide portion), 54, 55, 56} loading lock, 65, 66 {second arm (arm member), 71, 72} connection arm (connection member),
100mm tape cassette, 101mm tape (magnetic tape)

────────────────────────────────────────────────── (5) References JP-A-62-273647 (JP, A) JP-A-1-158659 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 15/665

Claims (1)

(57) [Claims] A linear skate chassis provided on a base chassis to which the rotary head drum is fixed so as to be movable toward and away from the rotary head drum, and on which a tape cassette is mounted; In a magnetic recording / reproducing apparatus comprising a tape loading mechanism for winding the magnetic tape of the tape cassette around the rotary head drum between a base chassis and a linear skate chassis, the tape loading mechanism is provided on the base chassis side. A tape guide provided on a loading block movably mounted along a guide portion provided on the base chassis, and rotatably supported on the base chassis side, and rotated with the movement of the linear skate chassis. Arm member, the arm member and the loading block A connecting member for connecting the linear skate chassis, the arm member rotates with the movement of the linear skate chassis, and this operation is transmitted to the loading block via the connecting member, and the loading block is guided by the guide. A magnetic recording / reproducing apparatus having a structure in which the tape guide operates so as to be pulled out and wound around a rotary head drum by being moved along a section.