JPH06103648A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide the magnetic recording and reproducing device of a tape non-exchange system which is small in size and can be packaged to a printed circuit board. CONSTITUTION:A case 1 is internally provided with a first tape reel 26 and a second tape reel 27 and either of a tape reel 26 or 27 is driven by a motor M housed in this case 1. A magnetic tape T paied out from the first tape reel 26 is taken up on the second tape reel 27 via a guide pin 5a when, for example, the second tape reel 27 is driven. The magnetic tape, then, travels diagonally in a direction alpha. A magnetic head H is diagonally mounted to a head supporting member 31 and the diagonally traveling magnetic tape T is subjected to recording or reproducing by this magnetic head H.

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 magnetic tape, and more particularly to a magnetic recording / reproducing apparatus in which the magnetic tape is a non-replaceable type and can be directly mounted on a printed circuit board. Regarding

[0002]

2. Description of the Related Art A cassette type tape player is generally used as a recording / reproducing apparatus using a magnetic tape. As an apparatus using the cassette type tape player, there is an answering machine or the like in addition to the audio apparatus. So-called compact cassettes are used in audio devices, and so-called micro-cassettes are used in answering machines. In these devices, a loading mechanism for guiding the tape cassette to the tape drive unit is provided, and the tape drive unit is fitted with a tape reel in the loaded tape cassette and drives the reel, and a magnetic tape. Is provided with a capstan mechanism for driving the car at a constant speed.

[0003]

The cassette type tape player is required to be compatible with different tape cassettes to be loaded because it is premised that the tape cassettes are exchanged. Therefore, the position dimensions of each mechanism in the tape player, the rotation speed of the capstan mechanism, etc. must be manufactured according to specified standards, and the azimuth angle of the magnetic head with respect to the tape must be adjusted with high accuracy. Must-have. Therefore, a tape player using a tape cassette is required to have a complicated structure and high manufacturing accuracy, and the adjustment work is complicated.

However, in a tape player such as an answering machine whose main purpose is to perform self-recording and reproduction, it is not necessary to replace the tape cassette. This is also the case when the magnetic tape is used as a storage medium unique to electronic equipment. Thus, when the tape type magnetic recording / reproducing apparatus is used as an answering machine or a unique storage medium, compatibility between tapes or tape cassettes is not required. However, when the conventional cassette type tape player is used in an answering machine or the like which does not need to consider compatibility between tapes, when the tape cassettes such as the reel base, the capstan mechanism and the azimuth adjusting mechanism are used, Since it includes an unnecessary mechanism for compatibility, it becomes a larger unit than necessary,
Not only does this hinder the miniaturization of the equipment in which it is installed,
The price of the entire device will also increase.

The present invention solves the above-mentioned conventional problems, and provides a magnetic recording / reproducing apparatus which can be manufactured at a low cost with a minimum number of parts and can be mounted on a printed circuit board as it is. Has an aim.

[0006]

A magnetic recording / reproducing apparatus according to the present invention comprises a tape reel on which a magnetic tape is wound, a drive mechanism for rotating the tape reel to run the magnetic tape, and recording of the running magnetic tape. The magnetic head that comes into contact with the surface is provided in a common case.

Further, it is possible to form a mounting portion on the case for directly mounting on the printed circuit board.

Further, the drive mechanism is composed of a motor and a speed reducing mechanism for decelerating the power of the motor and transmitting the power to the tape reel, and the tape reel is rotated on the outer periphery of the motor coaxially with the shaft of the motor. It is preferably provided so as to move.

In this case, the tape reel can be provided on the outer periphery of the projecting support portion projecting from the outer surface of the case to the inside of the case, and the motor can be removably inserted into the projecting support portion.

[0010]

In the above means, the tape reel wound with the magnetic tape and the drive mechanism are housed in the same case.
The drive mechanism drives the tape reel to run the magnetic tape. A magnetic head that comes into contact with this magnetic tape is provided in the case, and recording and reproduction are performed on the magnetic tape. Since these members are housed in a common case, the whole can be handled as one unit part. For example, they can be mounted as they are on a printed circuit board and used as a self-recording / reproducing device for an answering machine or for other electronic devices. It can be used as a storage device.

Further, by arranging the tape reel on the outer periphery of the motor coaxially with the motor, not only can the overall size be reduced, but also the tape winding diameter can be increased to reduce the tape damage. When driven at a constant speed, the tape speed difference between the tape start end and the tape end can be minimized.

In this case, the case is provided with a projecting support portion projecting inward, and the motor is detachably inserted into the projecting support portion so that the motor can be removed and the assembling work and maintenance work can be simplified. Like

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of a magnetic recording / reproducing apparatus according to the present invention, FIG. 2 is a view of the assembled magnetic recording / reproducing apparatus as seen from an arrow II in FIG. 1, and FIG. 3 is an assembled magnetic recording / reproducing apparatus. 4 is an enlarged partial sectional view of a portion of FIG. 3, FIGS. 5A and 5B are plan views showing a reduction drive mechanism, and FIG. 6 is an enlarged plan view of a magnetic head support portion. 7 is a side view of FIG.

As shown in FIGS. 1 to 3, the case 1 is divided into a lower case 2 and an upper case 3. The lower case 2 and the upper case 3 are made of a transparent or non-transparent resin material. In the illustrated embodiment, the planar shapes of the lower case 2 and the upper case 3 are octagons, but the planar shapes of the cases may be circular or elliptical. Female screw holes 2a are formed at three places in the mating portion of the lower case 2,
Screw insertion holes 3a are formed at three locations on the upper case 3. When the lower case 2 and the upper case 3 are aligned with each other, the three mounting screws 4 (only one is shown in the drawing) are inserted into the screw insertion holes 3a and screwed into the female screw holes 2a. Is assembled.

The case 1 is not limited to the structure assembled by screwing, and the case 1 may be assembled by welding the lower case 2 and the upper case 3 to each other. That is, since this magnetic recording / reproducing apparatus is premised on that the magnetic tape housed inside is not replaced, there is no problem even if the lower case 2 and the upper case 3 are assembled so as not to be disassembled. Engaging claws 2b are integrally projected at three locations on the lower surface of the lower case 2. This magnetic recording / reproducing apparatus is handled as a single unit part as a whole. For example, by engaging the engaging claw 2b with a mounting hole formed in a printed circuit board of an answering machine or other equipment, The recording / reproducing device can be directly mounted on the printed circuit board.

A ring-shaped protrusion 2d is formed on the inner bottom surface 2c of the lower case 2 so as to be raised.
Circular teeth 2e of a predetermined module are formed on the inner circumference of d. The upper case 3 is integrally formed with a cylindrical protruding support portion 3b that protrudes inward from the upper surface of the upper case 3. As shown in FIG. 3, the protruding support portion 3b and the ring-shaped protrusion 2d of the lower case 2 are positioned coaxially,
Further, the outer diameter dimension D1 of the projecting support portion 3b is the same as the ring-shaped projection 2
It is substantially the same as the inner diameter D2 of the tip of the circumferential tooth 2e of d. Further, a space A having a predetermined height is formed between the bottom portion 3c of the protruding support portion 3b and the inner bottom surface 2c of the lower case 2.

On the upper surface of the upper case 3, a pair of holding claws 3d are integrally formed on the opening edge of the projecting support 3b. The motor M is inserted into the internal space B of the projecting support portion 3b, and at this time, the holding claws 3d are fitted to the bottom surface of the motor M and held so that the motor M is not separated from the internal space B. Further, the holding claw 3d is formed to have an elastically deformable size, and the motor M can be pulled out from the internal space B by forcibly opening the holding claw 3d.

As shown in FIG. 2, pin supporting recesses 2f and 2g are formed in the lower case 2, and the upper case 3 is formed in the upper case 3.
Pin support recesses 3f and 3g are formed. A guide pin 5a is sandwiched between the pin support recesses 2g and 3g, and a guide pin 5b is sandwiched between the pin support recesses 2f and 3f.
Both guide pins 5a and 5b are attached so as to be inclined according to the traveling angle of the magnetic tape T. Furthermore, FIG.
As shown in FIG. 3, one side surface of the lower case 2 and the upper case 3 is formed in a concave shape, and the edge portion thereof has head supporting sides 2 h and 3 h.
It is h.

Between the lower case 2 and the upper case 3,
The deceleration drive mechanism 10 is housed. The structure of the deceleration driving mechanism 10 will be described below. A disc 11 is provided inside the ring-shaped protrusion 2d of the lower case 2. The circular plate 11 is rotatably supported by a pin 12 fixed to the inner bottom surface 2c of the lower case 2 and inside the ring-shaped projection 2d. On this disk 11, a pair of planet gears 1
3, 13 are provided. The pair of planetary gears 13 and 13 have the same structure.

As shown in FIG. 4, each planetary gear 1
3 has a first gear 14 and a second gear 15.
The first gear 14 and the second gear 15 are inserted into a support shaft 16 fixed to the disc 11 so as to be rotatable independently of each other. A felt 17 is interposed as a friction member between the inner bottom surface of the first gear 14 and the bottom surface of the second gear 15, which are formed in a concave shape. A ring 18a is installed on the upper end of the center of the second gear 15, and the ring 18a
A retaining ring 18b fitted to the support shaft 16 is provided on the upper surface of a. A coil spring 19 is interposed between the inner bottom surface of the concave second gear 15 and the ring 18a, and the elastic force of the coil spring 19 causes the first gear 14 and the second gear 15 to move. And the felt 17 between them are pressed against each other. In each planetary gear 13, 13, the felt 17 and the coil spring 1
Due to the friction mechanism comprised of 9 and 9, normally the first and second gears 14 and 15 rotate together and the first and second gears 14 and 15 rotate together.
When an excessive load torque acts on one of the gears 15 and 15, both gears 14 and 15 can slip with each other.

The first gear 14 of each planetary gear 13,13,
Each of the teeth 14a, 14a of 14 always meshes with the circumferential tooth 2e formed on the inner circumference of the ring-shaped projection 2d of the lower case 2. A pinion gear 22 is fixed to the output shaft 21 of the motor M. In a state in which the motor M is inserted into the internal space B of the protrusion support portion 3b of the upper case 3 and is held by the holding claws 3d and 3d, the pinion gear 22 extends from the center hole 3e of the bottom portion 3c of the protrusion support portion 3b. It projects downward. And the pinion gear 22
Enters between the pair of planet gears 13 and 13, and the teeth 14a, 14a of the first gears 14, 14 of both planet gears 13, 13
Is meshing with.

When the pinion gear 22 is driven by the motor M, the first gears 14, 14 are driven respectively.
Since the first gears 14 and 14 mesh with the circumferential teeth 2e of the ring-shaped protrusion 2d, when the first gears 14 and 14 are driven by the pinion gear 22, the disc 11 moves to the pin 1
The first gears 14, 14 rotate about the center of the second gear, and the first gears 14, 14 planetarily move along the circumferential teeth 2e in the same direction as the rotation direction of the pinion gear 22. At this time, if the load torque of a predetermined value or more does not act on the second gears 15, 15, the felt 1
The second gears 15 and 15 are connected to the first gear 1 via
It rotates around the support shaft 16 together with 4, 14.

A drive cylinder 25 is inserted through the outer periphery of the protruding support portion 3b of the upper case 3. As shown in FIGS. 3 and 4, the upper and lower ends of the drive cylinder 25 are sandwiched between the upper bottom surface of the upper case 3 and the upper end surface of the ring-shaped protrusion 2 d of the lower case 2, and Inner peripheral surface 25a and protruding support portion 3
The outer peripheral surface of b is inserted with almost no gap, and the drive cylinder 25
Can rotate substantially coaxially with the motor M with almost no play in the axial and radial directions. The lower end of the inner peripheral surface 25a of the drive cylinder 25 is a tooth portion 25b. The teeth 15a of the second gears 15, 15 forming the planetary gears 13, 13 mesh with the teeth 25b.

The circumferential teeth 2e on the inner circumference of the ring-shaped projection 2d
And the teeth 14a of the first gear 14 constituting each planetary gear 13
The tooth modules of the tooth 15a of the second gear 15 and the tooth portion 25b of the drive cylinder 25 are the same. Further, the number of teeth of the first gear 14 is N1, and the number of teeth of the second gear 1 is
If the number of teeth of 5 is N2, the number of teeth of the circumferential tooth 2e is Na, and the number of teeth of the tooth portion 25b of the drive cylinder 25 is Nb, (N1 <N2)
And (Na> Nb). Therefore, the pinion gear 22 causes the first gears 14, 1 of the planetary gears 13, 13 to rotate.
4 is driven, the first gears 14, 14 make planetary rotation along the circumferential teeth 2e of the ring-shaped projection 2d, and the first gear 1
When the second gears 15, 15 rotate with 4, 14,
A drive cylinder 25 meshing with the second gears 15, 15.
Is driven to decelerate and rotate in a direction opposite to the orbiting direction of the planetary gears 13 and 13 by the gear ratio. This reduction ratio is, for example, about 4 to 8 (rpm) for the drive cylinder 25 when the pinion gear 22 rotates at 1600 (rpm).

A first tape reel 26 and a second tape reel 27 are inserted on the outer peripheral surface of the drive cylinder 25. Both tape reels 26 and 27 are inserted around the outer periphery of the drive cylinder 25 so that they can rotate independently of each other.
The outer peripheral surface of the first tape reel 26 is a tape winding surface 26a.
And a flange 26b is formed at the upper end. The second tape reel 27 has the same shape as the first tape reel 26 and is arranged upside down.
The outer peripheral surface becomes a tape winding surface 27a, and a flange 27b is formed at the lower end.

The first and second tape reels 26 and 27 are
The flanges 26b and 27b are installed on the outer periphery of the drive cylinder 25 so as to be aligned with each other. Friction plates 28 are interposed at the lower end surface of the first tape reel 26, the upper end surface of the second tape reel 27, and at three points between the two tape reels 26 and 27. In FIG. 1, for convenience of illustration,
Only one friction plate 28 is shown. This friction plate 2
8 generates frictional force between the rotating tape reels 26 and 27. Therefore, for example, the second tape reel 27 is driven by the drive cylinder 25, and the tape winding surface 2
When the tape is wound around 7a, a load torque is applied to the first tape reel 26 on the tape supply side by the friction plate 28, and a predetermined tension is generated in the supplied tape.

Next, a clutch mechanism for transmitting rotational power from the drive cylinder 25 to the tape reel 26 or 27 will be described. FIG. 5A is a plan view of the second tape reel 27 located on the upper side as seen from above, and FIG. 5B shows the first tape reel 2 with the second tape reel 27 removed.
FIG. 6 is a plan view of the same as seen from above. Clutch grooves 27c are formed at six locations on the inner periphery of the second tape reel 27. The clutch groove 27c has a wedge shape, and the counterclockwise end portion of FIG. 5 is an idling portion (a) having a large radial dimension, and the clamping portion where the radial opening dimension is gradually narrowed on the clockwise side. It is (b). As described above, the first tape reel 26 and the second tape reel 27
Of the same structure are vertically symmetrically arranged. Therefore, in the first tape reel 26, the clutch groove 27
A clutch groove 26c having the same shape as c is located on the lower side, and the clutch groove 26c is oriented in a rotationally symmetrical manner with the clutch groove 27c. That is, as shown in FIG.
Clutch groove 2 formed on the first tape reel 26
In 6c, the end portion on the clockwise side is an idling portion (a), and the counterclockwise side is a clamping portion (b) whose opening size is gradually narrowed.

Clutch groove 2 of each tape reel 26, 27
Clutch pins 29 are respectively inserted between 6c and 27c and the outer peripheral surface of the drive cylinder 25 in a free state. A clutch mechanism is formed by the clutch groove 26c and the clutch pin 29 between the first tape reel 26 and the drive cylinder 25, and between the second tape reel 27 and the drive cylinder 25.
A clutch mechanism is configured by the clutch groove 27c and the clutch pin 29.

When the drive cylinder 25 is driven in the clockwise direction in FIG. 5 by the speed reduction mechanism, each clutch pin 29 moves in the clockwise direction along the outer peripheral surface of the drive cylinder 25, and the clutch pin 29 moves into the clutch groove. The second tape reel 27 is driven in the clockwise direction by being pinched between the pinching portion (b) of 27c and the outer peripheral surface of the drive cylinder 25. At this time, in the lower first tape reel 26, the clutch pin 29 is located in the idling portion (a) of the clutch groove 26c. The radial dimension of the idling portion (a) is slightly wider than the outer diameter dimension of the clutch pin 29. Therefore, drive cylinder 2
5 rotates clockwise, the first tape reel 26
No driving force is applied to the first tape reel 26, and the first tape reel 26 is in the idling state. Therefore, when the tape is wound by the tape winding surface 27a of the second tape reel 27 on the drive side, the first tape reel 26 is pulled by the magnetic tape and follows and rotates. At this time, a predetermined load torque is applied to the first tape reel 26 by the friction plate 28, and tension is applied to the magnetic tape.

On the contrary, when the drive cylinder 25 is driven counterclockwise in FIG. 5, the clutch pin 2 is inserted in the clutch groove 26c formed in the first tape reel 26.
9 enters the pinching portion (b), and a counterclockwise driving force is applied to the first tape reel 26. At this time, in the second tape reel 27, the clutch pin 29 has the clutch groove 27.
The rotation force is not applied to the second tape reel 27 by entering the idling portion (a) of c. Therefore, at this time, the tape is wound by the tape winding surface 26a of the first tape reel 26 on the drive side, and the second tape reel 27 is pulled by the magnetic tape T and follows and rotates. Also at this time, a load torque is applied to the second tape reel 27 by the friction plate 28, and a predetermined tension is applied to the magnetic tape. Case 1 in which the lower case 2 and the upper case 3 are combined
Then, the head supporting sides 2h and 3h are continuous on one side, and the head supporting window C is formed in this portion.

As shown in FIG. 6, a head supporting member 31 is attached to the head supporting window C. The head support member 31 is made of a resin material,
The outer dimensions are substantially the same as the opening dimensions of the head support window C formed by the head support sides 2h and 3h. Positioning projections 31a, 31 are provided on both left and right side surfaces of the head support member 31.
When a is formed and the head support member 31 is inserted into the head support window C, the positioning protrusions 31a and 31a contact the outer peripheral surface of the head support window C. In addition, the head support member 3
Elastically deformable locking claws 31 on the left and right ends on the inner surface side of 1.
b and 31b are integrally formed, and the head support member 3
When 1 is inserted into the head support window C, this locking claw 31
b and 31b are locked to the inner surface around the head supporting window C.

The head support members 31 are fixed by sandwiching the head support sides 2h and 3h of the lower case 2 and the upper case 3 between the locking claws 31b and 31b and the positioning protrusions 31a and 31a. Further, the locking claws 31b, 31
The head support member 31 can be removed from the head support window C by pulling the head support member 31 outward against the elastic locking force of b.

A magnetic head H is attached to the head supporting member 31, and when the head supporting member 31 is mounted in the head supporting window C, a gap forming surface H of the magnetic head H is formed.
a is directed inside the case 1. As shown in FIG.
The magnetic tape T is separated from the tape winding surface 26a of the first tape reel 26, hung on the guide pins 5a and 5b, and reaches the tape winding surface 27a of the second tape reel 27. Therefore, between the guide pins 5a and 5b, the magnetic tape T runs in a direction inclined with respect to the respective axes of the tape reels 26 and 27 and the motor M. As shown in FIG. 2, the magnetic head H is obliquely attached to the head supporting member 31, the head gap provided on the gap forming surface Ha, and the magnetic tape T traveling obliquely.
And the azimuth angles are the same.

To the head supporting member 31, a detecting member 32 located on the right side of the magnetic head H in the figure is attached. The detection member 32 is formed by curving the tip of a metal plate. An EOT (End Of Tape) is provided at a position slightly before the end of the magnetic tape which is fed from the first tape reel 26 or the second tape reel 27 and runs.
A metal foil for detection is attached. By this metal foil short-circuiting the detection member 32 and the shield case of the magnetic head H, EOT detection can be performed. As shown in FIG. 6, the terminal 33 of the magnetic head H and the terminal 32 a at the rear end of the detection member 32 are connected to the head support member 3
It projects to the outside of 1. Therefore, it is preferable to provide a cover to be mounted on the rear end surface of the head support member 31 and to protect the terminals 32a and 33 by the cover.

As shown in FIGS. 1 and 7, a pad support member 35 formed of a leaf spring is attached to the inner bottom surface 2c of the lower case 2, and a head pad 36 is adhered to its rising surface 35a. There is. The head pad 36 faces the gap forming surface Ha of the magnetic head H. If the head pad 36 is constantly pressed against the gap forming surface Ha of the magnetic head H by a predetermined pressure by the elastic force of the pad supporting member 35 formed of a leaf spring, the gap forming surface Ha and the head pad 36. The magnetic tape T traveling between the magnetic tape T and the magnetic tape T is constantly pressed against the gap forming surface Ha with an optimum pressure, and the contact between the gap forming surface Ha and the magnetic tape T can be maintained. However,
In this magnetic recording / reproducing apparatus, since the magnetic head H and the magnetic tape T continue to face each other while the recording / reproducing is suspended, the head pad 36 is moved to the magnetic head H during the suspension period.
If the pressure is continuously applied to the magnetic tape T, the magnetic tape T may stick to the gap forming surface Ha during the rest period.

Therefore, in the illustrated embodiment, as shown in FIGS. 6 and 7, the shape of the pad support member 35 causes the head pad 36 to move from the gap forming surface Ha of the magnetic head H during the recording / reproducing pause period. I try to separate them slightly.
A moving pressing member 37 is provided at the mating portion of the tape reels 26 and 27. The moving and pressing member 37 is made of resin or the like, and a thin portion 37a is formed at the rear end thereof, and the thin portion 37a includes the first and second thin portions.
The tape reels 26 and 27 are joined to each other and are provided outside the friction plate 28. And the moving pressing member 3
Pressure protrusions 37b and 37c are formed on both ends of the outer peripheral portion of the plate 7.

During the rest period of the recording / reproducing operation, the intermediate portion 37d of the pressure projections 37b and 37c of the movable pressing member 37 is formed.
However, since the head supporting member 35 is located behind the rising surface 35a, no pressing force acts on the rising surface 35a. Therefore, the head pad 36 is located on the gap forming surface Ha of the magnetic head H.
The magnetic tape T is separated from the gap forming surface Ha of the magnetic head H by its own tension. By the recording or reproducing operation, the first tape reel 26 or the second tape reel 27 is driven, and both tape reels 2
When 6 and 27 rotate clockwise or counterclockwise in FIG. 6 according to the tape running direction, the moving pressing member 37 sandwiched between both tape reels 26 and 27 moves clockwise or counterclockwise, Any pressure protrusion 3
7b or 37c intervenes between the rising surface 35a of the head support member 35 and the flanges 26b, 27b, the rising surface 35a is pressed toward the magnetic head H, and the head pad 36 causes the magnetic tape T to move to the gap of the magnetic head H. Pressure is applied to the forming surface Ha. By contacting the magnetic tape T with the magnetic head only during the recording / reproducing operation as described above, it becomes possible to prevent sticking of the magnetic tape during the pause period.

In the illustrated embodiment, the motor M is provided at the center and the magnetic head H is provided at the outer periphery of the motor M. Therefore, the pad support member 35 located between the two
Since the rising surface 35a of the pad supporting member 35 can be made to function as a shield plate for protecting the magnetic head H, noise generated from the motor M is shielded by the rising surface 35a of the pad supporting member 35, and Motor noise to the head H and its signal transmission path can be blocked. Further, in order to exert the shield function more effectively, the width dimension (vertical dimension in the figure of FIG. 6) and height dimension (vertical dimension in the figure of FIG. 7) of the rising surface of the pad support member 35 in the circumferential direction. May be wider.

Next, the operation of the magnetic recording / reproducing apparatus having the above structure will be described. When the pinion gear 22 provided on the output shaft 21 of the motor M is driven counterclockwise in FIG. 5 (A) and the planet gears 13, 13 move counterclockwise around the planet, the drive cylinder is driven by a predetermined reduction ratio. 25 is driven clockwise. At this time, the clutch pin 29 shown in FIG. 5A enters the pinching portion (b) of the clutch groove 27c formed in the second tape reel 27, and the driving force is applied to the second tape reel 27. As shown in FIG. 5 (B),
At this time, in the first tape reel 26, the clutch pin 2
9 enters the idling portion (a) of the clutch groove 26c, and the driving force does not act on the first tape reel 26. Therefore, the magnetic tape T wound on the tape winding surface 26a of the first tape reel 26 is separated from the winding surface 26a at any time, passes the outer circumferences of the guide pins 5a and 5b, and is wound on the second tape reel 27. It is wound by the surface 27a. The tape running direction at this time is indicated by α in FIG.

The first tape reel 26 is pulled by the magnetic tape T and rotates following it. At this time, a load torque is applied to the first tape reel 26 by the friction plate 28 and passes through the portions of the guide pins 5a and 5b. A predetermined tension is applied to the magnetic tape T to be turned. In addition, the first and second tape reels 2
When 6 and 27 rotate clockwise in FIG. 6, the moving pressing member 37, in which the thin portion 37a is sandwiched between the tape reels 26 and 27, moves in the clockwise direction, and the pressing protrusions 37b move to the pads. Rising surface 3 of support member 35
5a is pressed toward the magnetic head H, and the head pad 36 causes the magnetic tape T to move the gap forming surface Ha of the magnetic head H.
Is pressed by.

Therefore, the magnetic tape T runs in the α direction while contacting the gap forming surface Ha of the magnetic head H at a predetermined pressure. Then, when the tape end in the traveling direction approaches, the EOT detection metal foil attached to the magnetic tape T short-circuits the detection member 32 and the shield case of the magnetic head H, and an EOT detection output is obtained.

On the contrary, in FIG. 5 (A), the pinion gear 22 is driven clockwise by the output of the motor M, and the planetary gears 13, 13 are rotated clockwise.
5 is driven counterclockwise at a predetermined reduction ratio. At this time, in the first tape reel 26 shown in FIG.
The clutch pin 29 enters the pinching portion (b) of the clutch groove 26c, and a counterclockwise driving force is applied to the first tape reel 26. At this time, in the second tape reel 27, the clutch pin 29 enters the idling portion (a) of the clutch groove 27c, and the power is not transmitted. Therefore, at this time, the second
The magnetic tape T that has come out from the tape winding surface 27a of the tape reel 27 is wound around the tape winding surface 26a of the first tape reel 26 via the guide pin 5a and the guide pin 5b, and the magnetic tape T is in the β direction in FIG. Drive to. At this time as well, a load torque is applied to the second tape reel 27 on the driven side by the friction plate 28, and the magnetic tape T runs while maintaining a predetermined tension.

The moving pressing member 37 shown in FIG. 6 moves counterclockwise following the tape reels 26 and 27,
The pressurizing projections 37 c are the rising surfaces 35 of the pad support member 35.
When a is pressed, the magnetic tape T runs while being pressed against the gap forming surface Ha of the magnetic head H by the pad 36.
Further, the metal foil for detecting the EOT of the magnetic tape T traveling in the β direction is the shield case of the magnetic head H and the detecting member 32.
An EOT detection output is obtained by shorting and.

When the magnetic tape T is running in the α direction or β direction, if the tape reels 26, 27, etc. are overloaded, or the EOT detection malfunctions, the tape runs to the end. When the load on the reels 26 or 27 increases, each planet gear 1
3, the first gear 14 meshed with the circumferential teeth 2e of the ring-shaped projection 2d and the second gear 15 meshed with the tooth portion 25b of the drive cylinder 25 slip through the felt 17. . By this slip operation, it is possible to prevent the driving force of the motor M from acting on the magnetic tape T excessively and causing the tape to break.

When the magnetic tape T is running in the α direction or β direction, a recording operation or a reproducing operation is performed by the magnetic head H. During this recording or reproducing operation, the motor M is always at a constant rotation speed. Demonstrate the driving force,
Drive barrel 25 and either tape reel 26 or 2
7 is driven at a constant rotation speed. Therefore, the tape winding diameter changes depending on whether the number of tape windings of the tape reel 26 or 27 on the winding side is small or large, and the running speed of the magnetic tape running in the α direction or the β direction gradually changes. However, this magnetic recording / reproducing apparatus
Since the purpose is self-recording and reproduction, no problem occurs in reproduction operation even if the running speed of the magnetic tape changes gradually.

Further, in this embodiment, the first and second tape reels 26 and 27 are further provided on the outer periphery of the motor M and the drive cylinder 25.
Since it rotates around the outer circumference of the tape reel, the outer diameter of the tape winding surfaces 26a and 27a of the respective tape reels 26 and 27 is large while the overall structure is small.
Therefore, when the number of windings of the magnetic tape is changed, the change rate of the tape winding outer diameter becomes small, the change rate of the running speed is extremely small, and the change rate of the tape running speed is small. Therefore, the change in tape speed does not affect the recording / reproducing operation.

Next, a specific method of using the magnetic recording / reproducing apparatus will be described. When the gap forming surface Ha of the magnetic head H is provided with only a head gap in one traveling direction of the tape, for example, the recording or reproducing operation is performed only when the magnetic tape T is traveling in the α direction. . In this case, so-called reverse recording / reproduction cannot be performed. Therefore, for example, in the case of an answering machine, the tape runs in the α direction and recording is performed over its entire length, and when the reproduction of this recording is completed, the driving speed of the motor M is increased to reverse the magnetic tape. A method of use is possible in which T is run in the β direction at a high speed and a bias current is passed through the coil of the magnetic head H to erase the recorded contents.

A head gap for recording / reproducing the magnetic head H in the α and β traveling directions is provided, and the magnetic tape records and reproduces in both the α and β traveling directions. You may do it. Also motor M
Since the tape running speed can be changed by increasing the rotation speed of, the high speed search operation can be performed, for example. Alternatively, high-speed recording in which a tape is run at a high speed for recording, or cue or review operation in which a tape is run at a high speed for reproduction is possible.

Further, the signal recorded / reproduced by the magnetic head H is not limited to an analog signal and may be a digital signal. In this case, a fixed type magnetic head H may be used as in the embodiment shown in the figure, or a magnetic head may be provided on a rotary drum and the magnetic tape may be helically scanned by a running magnetic tape. . In the illustrated embodiment, the magnetic head H is fixed to the head support member 31,
Although the head supporting member is fixed to the case 1, the supporting member for supporting the magnetic head is provided in the case so as to move in the direction of coming into contact with the tape and moving away from the tape, and recording is performed by a driving source such as a solenoid. / The magnetic head may be forcibly separated from the tape T during the reproduction pause period. Further, in the illustrated embodiment, the planetary gear 13 is used as the reduction drive mechanism 10, but the reduction drive mechanism may be composed of a plurality of spur gears or the like.

[0050]

As described above, according to the present invention, the tape reel, the magnetic tape wound around the tape reel, the drive mechanism for driving the tape reel, and the magnetic head are housed in a common case. A mechanism for ensuring compatibility between cassettes as in a player is not required, and a compact magnetic recording / reproducing device can be configured with a minimum number of parts.

According to the second aspect of the invention, the magnetic recording / reproducing apparatus can be handled as one unit component and directly mounted on the printed circuit board. Therefore, for example, when this magnetic recording / reproducing apparatus is used as a storage device of an answering machine or a storage device of other electronic equipment, it can be mounted inside the device as a unit part.

According to the third aspect of the present invention, the tape reel is rotatably provided on the outer periphery of the motor coaxially with the shaft of the motor. Further, since the diameter of the tape reel can be increased, the winding diameter of the tape can be increased, and the occurrence of tape damage due to winding can be prevented. Further, since the tape reel has a large diameter, when the tape reel is rotated at a constant speed, the deviation of the tape speed due to the change in the number of tape windings becomes very small. Therefore, in self-recording / reproduction, a change in sound quality due to a difference in tape speed does not occur.

According to the fourth aspect of the invention, since the motor is detachable, the assembly work and the motor replacement work can be easily performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention,

FIG. 2 is a sectional view of the magnetic recording / reproducing apparatus in an assembled state taken along the line II in FIG.

FIG. 3 is a vertical cross-sectional view showing the magnetic recording / reproducing apparatus in an assembled state,

FIG. 4 is a partial sectional view showing a part of FIG. 3 in an enlarged manner;

5A is a plan view showing a second tape reel located on the upper side, FIG. 5B is a plan view showing a first tape reel located on the lower side, FIG.

FIG. 6 is a partially enlarged plan view showing a head supporting portion,

FIG. 7 is a side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 case 2 lower case 2b engaging claw 2d ring-shaped projection 2e circumferential tooth 3 upper case 3b projecting support part 3d holding claw 10 reduction drive mechanism 13 planetary gear 14 first gear 15 second gear 17 felt 19 spring 22 pinion gear 25 Drive Tube 25b Teeth 26 First Tape Reel 26c Clutch Groove 27 Second Tape Reel 27c Clutch Groove 28 Friction Plate 29 Clutch Pin 31 Head Supporting Member 32 Detecting Member 35 Pad Supporting Member 36 Head Pad 37 Moving Pressing Member M Motor H magnetic head T magnetic tape

Claims (4)

[Claims] 1. A tape reel around which a magnetic tape is wound,
A magnetic recording / reproducing apparatus characterized in that a drive mechanism for rotationally driving a tape reel to drive a magnetic tape and a magnetic head in contact with a recording surface of the traveling magnetic tape are provided in a common case. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the case is provided with a mounting portion for directly mounting on a printed circuit board. 3. The drive mechanism comprises a motor and a speed reduction mechanism that decelerates the power of the motor and transmits the power to the tape reel, and the tape reel is coaxial with the motor shaft on the outer periphery of the motor. The magnetic recording / reproducing apparatus according to claim 1, wherein the magnetic recording / reproducing apparatus rotates. 4. The magnetic recording / reproducing according to claim 3, wherein the tape reel is provided on an outer periphery of a projecting support part projecting from the outer surface of the case to the inside of the case, and the motor is detachably inserted in the projecting support part. apparatus.