JPH0660504A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the number of parts and to reduce the weight by loading a tape in utilizing the movement of a linear scale chassis for moving a tape cassette. CONSTITUTION:Tape guides 21 and 26 on the linear scale chassis 7 are moved with their respective engagement pins 22 and 27 along cam grooves 23 and 28 of a base chassis by inserting and forward moving the chassis 7, and tape guide arms 19 and 24 are turned around shafts 20 and 25 as the centers, so that the tape guides 21 and 26 are moved forward to the outer side so as to draw the tape 101 in a front surface of the tape cassette 100. A pinch roller arm 29 is turned around a center of a shaft 30 to approach a capstan 6, while a brake arm 34 is moved with its engagement pin 37 along a cam groove 38, so that a brake shoe 36 is separated from a circumferential surface of a reel base 8 on the supply side. A brake arm 39 is moved with its pin 42 along a groove 42, so that a claw 41 is engaged with a tooth 9a of a reel base 9 on the take-up side so as to stop the rotation of a reel 103. When the chassis 7 reaches the frontmost end, a recording/reproducing mode becomes effective, and individual members are stayed in their respective prescribed positions.

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 therefor.

[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 pulled out 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, a linear skate chassis is provided to move the tape cassette in the direction close to the rotary head drum at the time of loading to reduce the size of the mechanism in the depth direction. A mechanism has been proposed in which the rotary head drum is allowed to enter the concave pocket portion formed in the above.

Conventionally, in a magnetic recording / reproducing apparatus of this type, a tape loading mechanism for winding a magnetic tape around a rotary head drum is generally a mechanism operated by a drive system independent of a linear skate chassis. That is, in the conventional system, the driving force from the motor is separated into two systems on the way, one of which 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 a heavy weight of the apparatus and a disadvantage in cost.
The present invention has been made for the purpose of solving 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, and is 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 rotary head drum between the base chassis and the linear skate chassis. In the above, the tape loading mechanism is operated by the movement of the linear skate chassis.

[0006]

The tape loading mechanism operates by using the movement of the linear skate chassis for moving the tape cassette in this way, so that the number of parts can be reduced, and the weight and cost of the device can be reduced accordingly. Is possible.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a drive mechanism portion 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 the direction close to the rotary head drum for the purpose of downsizing the entire mechanism in the depth direction.
When the loading is completed, the rotary head drum is inserted into the concave pocket at the front of the tape cassette.

In FIG. 1, reference numeral 1 denotes a base chassis which is a base of a drive mechanism section of a magnetic recording / reproducing apparatus, and a signal is recorded / reproduced on / from a magnetic tape (hereinafter simply referred to as a tape) 101 of a tape cassette 100 on the base chassis. The rotary head drum 2 to be performed is fixed. Further, fixed tape guides 3, 4 and 5 for guiding the tape when the tape is running are erected on the base chassis 1, and a capstan 6 for running the tape at a constant speed.
Is projected.

On the other hand, 7 indicates a linear skate chassis,
This linear skate chassis 7 is the above-mentioned base chassis 1
The tape cassette 100 is supported on the linear skate chassis 7 so as to be linearly movable along the both side wall portions thereof in a direction of approaching / separating from the rotary head drum 2.
Is mounted and mounted. The tape cassette 100 mounted on the linear skate chassis 7 includes a reel base 8 in which a supply-side reel 102 and a winding-side reel 103 are rotatably supported on the linear skate chassis 7, respectively.
And 9 are engaged. The reel stands 8 and 9 are driven to rotate by a motor (not shown).

The linear skate chassis 7 on which the tape cassette 100 is placed is moved in a predetermined stroke by a moving mechanism formed between it 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 drive shaft of the motor 10 rotates at the final stage via a plurality of reduction gear groups 11 to 15. It is adapted to be transmitted to the operating gear 16. A pin 17 is provided at a peripheral end portion of the operating gear 16, and a receiving member 18 is fixed to the linear skate chassis 7 side in correspondence with 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 actuating gear 16 is engaged with a groove 18a formed in a direction orthogonal to the above. And motor 1
When the operating gear 16 is rotated by driving 0, the pin 1
7 presses the inner edge of the groove 18a of the receiving member 18, whereby the linear skate chassis 7 is moved relative to the base chassis 1.

On the linear skate chassis 7 on which the tape cassette 100 is placed and moved by the moving mechanism in this way, the tape cassette 100 to the tape 10 are placed.
There are provided tape guides 21 and 26 for pulling 1 out, a pinch roller 31 for pressing the tape 101 onto the capstan 6, and a movable member such as a brake member for restricting rotation of both reels 102 and 103 of the tape cassette 100.

First, the tape guide will be described. At the front left end of the linear skate chassis 7, a tape guide arm 19 is rotatably mounted about a shaft 20. One end of the tape guide arm 19 has a tape guide arm. 21 are erected. On the other hand, an engagement pin 22 is provided on the other end of the tape guide arm 19 so as to project downward, and the engagement pin 22 is engaged with a cam groove 23 of a predetermined shape formed on the base chassis 1. . In contrast to this, a tape guide arm 24 is attached to the front right end of the linear skate chassis 7 so as to be rotatable around a shaft 25, and a tape guide 26 is provided upright at one end of the tape guide arm 24. Has been done. On the other hand, an engagement pin 27 is provided at the other end of the tape guide arm 24 so as to project downward, 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.
At the front right end of the linear skate chassis 7, a pinch roller arm 29 is rotatably mounted around a shaft 30 in the vicinity of the tape guide arm 24, and one end of the pinch roller arm 29 is provided with a capstan 6. A pinch roller 31 corresponding to is rotatably supported. On the other hand, on the other end of the pinch roller arm 29, an engaging pin 32 is provided so as to project downward, and the engaging pin 3
2 is a cam groove 3 of a predetermined shape formed on the base chassis 1
3 is engaged.

To further explain the brake member, first, a brake arm 34 is rotatably mounted about a shaft 35 near the reel base 8 on the supply side of the linear skate chassis 7. 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 engaging pin 37 is provided on the other end of the brake arm 34 so as to project downward, and the engaging pin 37 is engaged with a cam groove 38 of a predetermined shape formed on the base chassis 1. In contrast to this, a brake arm 39 is rotatably mounted about a shaft 40 in the vicinity of the reel base 9 on the winding side of the linear skate chassis 7, and the reel is attached to a part of the brake arm 39. Brake pawls 41 corresponding to the locking teeth 9a formed on the peripheral surface of the base 9 are provided. Also this brake arm 3
An engaging pin 42 is provided at the end of the member 9 so as to project downward, and the engaging pin 42 engages with a cam groove 43 of a predetermined shape formed in the base chassis 1.

Incidentally, the tape guide arms 19 and 24,
Pinch roller arm 29, brake arms 34 and 39
Each of the engaging pins 22 and 27, 32, 37 and 42 penetrates through holes formed in the linear skate chassis 7, and cam grooves 23, 28, 33 of the base chassis 1, respectively.
Although it is engaged with 38 and 43, the illustration of this through hole is omitted in the drawings of this example.

A tape loading mechanism 44 for winding a tape around the rotary head drum 2 is formed between the base chassis 1 and the linear skate chassis 7. The tape loading mechanism 44 pulls the tape 101 forward by tape guides 45 and 46, 47, 48 and 49 which 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. It is a thing.

The detailed construction 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. In the base block 50, a guide rail portion 51 is provided on the left side of the rotary head drum 2, and a guide groove portion 52 and a guide rail portion 53 are provided on the right side. The loading blocks 54, 55, and 56 are attached so as to be movable along the guide rail portion 51, the guide groove portion 52, and the guide rail portion 53. Tape guides 45 and 46, 47, 48 and 49 are erected on the loading blocks 54, 55 and 56, respectively.

On the other hand, in response to this, a pair of left and right first arms 5 are provided on the lower surface side of the front end of the linear skate chassis 7.
7 and 58 are mounted so as 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.
Reference numerals 7a and 58a respectively project through the through holes 61 and 62 formed in the linear skate chassis 7 to the upper surface side, and between them, a crimp spring 63 composed of a spiral spring wound in a plane is installed. The force of the crimping spring 63 biases the first arms 57 and 58 inward, that is, in the direction in which they approach each other, and the locking pieces 57a and 58a are respectively formed in the through holes 6.
It is pressed against the inner edges of 1 and 62.

Corresponding to the first arms 57 and 58, a pair of second arms 65 and 66 are rotatably 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 elongated holes 67 and 68 having predetermined shapes, respectively.
Are formed, and 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 the second arm 65 and the loading block 54 are connected by the connecting arm 71, and the free end of the second arm 66 and the loading blocks 55 and 56 are connected by the connecting arm 7.
2, 73 and 74 are connected to each other, and as described in detail later, a second arm 65,
66 is rotated, and this is transmitted to the loading blocks 54, 55, and 56 via the connecting arm, so that the tape loading operation is performed.

Next, the operation of the apparatus of this example configured as described above will be described. The state shown in FIG. 1 is in the eject mode, that is, in this mode, the linear skate chassis 7 is at the rearmost position largely separated from the rotary head drum 2, and at the rearmost position of the linear skate chassis 7, the tape cassette for the magnetic recording / reproducing apparatus is formed. 100 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.
It is located at a position corresponding to the back side of the tape 101 which is accommodated in the recessed pocket portion in the front portion of the tape cassette 100 placed on the tape cassette 100, that is, exposed so as to be bridged 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 table 8 on the supply side, and applies a required frictional force to the reel table 8. On the other hand, the brake arm 39 on the right side has the brake claw 41 separated from the locking tooth 9a of the reel base 9 on the winding side. Further, in the tape loading mechanism 44, the tape guides 45, 46, 47, 48, 49 are all accommodated in the concave pocket portion in the front portion of the tape cassette 100, that is, the back side of the tape 101 exposed on the front surface of the tape cassette 100. It is in a position to

From this state, the motor 10 operates (this motor 10 operates when the tape cassette 100 is placed on the linear skate chassis 7), and the linear skate chassis 7 moves to the rotary head drum 2. When the tape cassette 100 is moved forward so as to come close to it, the tape cassette 100 is also moved integrally with the tape cassette 100, and the linear skate chassis 7 is temporarily stopped when the rotary head drum 2 enters the concave pocket portion at the front of the tape cassette 100. It This state is the stop mode shown in FIG.

By the forward movement operation of the linear skate chassis 7, the tape guides 21 and 26 arranged on the linear skate chassis 7 and the pinch roller 3 are arranged.
1. The movable members such as the brake arms 34 and 39 move in a predetermined manner according to the shape of the cam groove of the base chassis 1.

That is, in the tape guides 21 and 26, the engaging pins 22 and 27 are respectively in the cam grooves 23 and 28 of the base chassis 1.
The tape guide arms 19 and 24 move along the axis 2.
When the tape 101 on the front surface of the tape cassette 100 is pulled out by being rotated about 0, 25, the tape 101 is moved forward and outward. Further, the pinch roller 31 moves forward, that is, in the direction close to the capstan 6, by the engagement pin 32 moving along the cam groove 33 and the pinch roller arm 29 being rotated around the shaft 30. The brake arm 34 rotates so that the brake shoe 36 moves away from the peripheral surface of the reel base 8 on the supply side by the engagement pin 37 moving along the cam groove 38, while the brake arm 39 engages. When the pin 42 is moved along the cam groove 43, the brake claw 41 is rotated so as to be engaged with the locking tooth 9a of the reel base 9 on the winding side, and the rotation of the winding reel 103 is prevented. To do.

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

Further, when the linear skate chassis 7 is moved to the foremost end position from the stop mode of FIG. 2, the recording / reproducing mode shown in FIG.
When the linear skate chassis 7 moves to the reproduction mode, the tape guides 21 and 26 further move outward to apply tension to the tape 101, and the pinch roller 31 holds the tape 101 on the capstan 6. Then, the brake arm 34 again contacts the peripheral surface of the supply-side reel stand 8 to apply a required frictional force to the reel stand 8, while the brake arm 39 causes the brake arm 39 to contact the brake claw 41. Is released from the locking teeth 9a of the take-up reel stand 9, and the rotation restriction of the take-up reel 103 is released.

In this recording / reproducing mode, the capstan 6 and the reel base 9 on the take-up side are driven to rotate, so that the tape 101 maintains a proper tension and is fed from the supply-side reel 102 to the tape guides 21 and 3. , 4, 4
5,46 → rotary head drum 2 → tape guide 47,4
8, 49, 5 → between the capstan 6 and the pinch roller 31 → passes through the tape guide 26 and travels so as to be wound on the winding side reel 103.

As described above, in the apparatus of this embodiment, the tape guides 21 and 26, the pinch roller 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. 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 rearmost position (FIG. 4), the first arms 57, 5 are integrated with this.
8 moves, and further, in conjunction with the movement of the first arms 57, 58, a second arm 65, which is connected to the first arms 57, 58 via a pin and an elongated hole,
66 is rotated to open symmetrically about the support shaft 64 (FIG. 5). Therefore, the loading blocks 54 and 55 connected to the free ends of the second arms 65 and 66 are connected.
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, and 47 on these loading blocks.
And 48 and 49 operate so as to pull out the tape 101 forward and wind it around the peripheral surface of the rotary head drum 2.

In the recording / reproducing mode, when the linear skate chassis 7 is moved to the foremost end position (FIG. 6), the loading blocks 54, 55 and 56 are the guide rail portion 51, the guide groove portion 52 and the guide rail portion 53, respectively. Of the tape 101, the tape 101 is wound around the rotary head drum 2 at a predetermined wrap angle (tape loading is completed).

In this state, the loading block 54,
55 and 56 are the guide rail portion 51 and the guide groove portion 5, respectively.
2 and the front end of the guide rail portion 53, the linear skate chassis 7 is further advanced slightly in the state of hitting the front end portion of the guide rail portion 53. Therefore, the first arm 57,
58 is in a state in which the pins 69 and 70 are inclined and rotated so as to open outward respectively against the force of the crimp spring 63 by the pins 69 and 70 moving along the long holes 67 and 68 of the second arms 65 and 66. That is, in this state, the pins 69 and 70 of the first arms 57 and 58 act so as to push the second arms 65 and 66 forward, respectively, by the force of the crimping spring 63, so that the loading blocks 54, 55 and 56 are guided by the guide rail portions. 51, guide groove 52 and guide rail 5
The tape guides 45 and 46, 47, 48, and 49 are securely fixed and held in position because they are crimped to the foremost end of the tape 3 with a constant force. It is possible to use a coil spring or the like as the crimping spring 63 for crimping the loading block, but in the present example device, a spiral spring wound in a planar shape is adopted in order to make the mechanism section thinner. ing.

[0033]

As is apparent from the above-described structure, the magnetic recording / reproducing apparatus of the present invention has a structure for operating the tape loading mechanism by utilizing the movement of the linear skate chassis for moving the tape cassette.
Unlike the conventional magnetic recording / reproducing apparatus, it is not necessary to provide a dedicated drive system for operating the tape loading mechanism, so that the number of parts is greatly reduced compared to the conventional one, and the magnetic recording / reproducing apparatus as a whole is accordingly reduced. It has the effect of reducing the weight and cost.

[Brief description of drawings]

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

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

FIG. 3 is a plan view of a magnetic recording / reproducing apparatus according to an embodiment, showing recording / reading
It is in the playback mode.

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

FIG. 5 is a plan view of the tape loading mechanism, showing a state during 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 54, 55, 56 Loading Block 100 Tape Cassette 101 Tape

Claims (1)

[Claims] 1. A linear skate chassis on which a tape cassette is placed, the linear skate chassis being movably provided on a base chassis to which a rotary head drum is fixed, movably in a direction approaching / separating from the rotary head drum, In a magnetic recording / reproducing apparatus having a tape loading mechanism for winding the magnetic tape of the tape cassette around the rotary head drum between the base chassis and the linear skate chassis, the tape loading is performed by moving the linear skate chassis. A magnetic recording / reproducing apparatus having a structure in which a mechanism is operated.