JP2594416Y2 - Power switching mechanism for rotary head tape player - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary head type tape player used for a DAT or the like, and more particularly to the transmission of power to a reel base in a play mode and the use of a reel base in a tape loading / unloading mode. The present invention relates to a power switching mechanism for performing control.

[0002]

2. Description of the Related Art In a rotary head type tape player, a magnetic tape wound around a tape reel in a cassette pack is pulled out by a tape drawer and wound around a rotary head. Rotates to reproduce or record data recorded on the magnetic tape.

In a rotary head type tape player of this type, in a play mode or the like, the power of a motor is transmitted to one of a pair of reel stands on which a tape reel is installed, and the reel stand is driven. Power is not transmitted to the reel base. Further, in the tape loading operation for pulling out the magnetic tape from the cassette pack, it is necessary to allow the rotation of the reel base from which the tape is drawn and stop the rotation of the other reel base. Further, in the unloading operation for returning the once drawn magnetic tape into the cassette pack, only one of the reel bases is rotated to rewind the magnetic tape to the tape reel installed on this reel base.

Conventionally, a mechanism for switching power to both reel bases in the play mode and the stop mode, and a brake or locking force applied to one of the reel bases during tape loading / unloading to rotate the other reel base. Are separately provided.

[0005]

However, as described above, a mechanism for switching the power to the reel base in the play mode and the stop mode and a mechanism for applying a brake or a locking force to the reel base during tape loading / unloading are separately provided. In this case, the mechanism on the chassis of the tape player becomes very complicated, and it becomes very difficult to set the switching timing in each mode.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and a rotary head capable of switching power in a play mode, a stop mode, and a tape loading / unloading mode by a single switching member. It is an object of the present invention to provide a power switching mechanism for a tape player.

[0007]

A power switching device according to the present invention.
The structure is a pair of reel stands on which tape reels are installed.(2,
3)And a rotary head with a magnetic head(4)And the said
Pull out the magnetic tape wound on the tape reel and rotate
Tape pull-out member wound around the head(6,7)And mo
Driving body driven in forward and reverse directions by motor(12)
And the drive rotating body is joined so as to be capable of transmitting power and is driven.
The pair of reels move in a planetary manner according to the rotation direction of the rotating body.
Idler that selectively transmits power to the table(14)Provided
Of the rotating head type tape player
Play mode, stop mode,
Pull out tape from the tape reelLoading mode
And tapeRewind to tape reelSuaLoading
Switching member whose position changes in each mode(21)
Is provided, and this switching member is provided.(21)In the
Planet in the direction of both reels of idler in Ray mode
Switching unit that allows movement(27c), In stop mode and
Block idler planetary movement in the direction of both reel bases
Switching section(27b), aIn loading modePrevious
The direction of one reel base (2) by the rotation force of the driving rotating body
Try to move to planetIdler'sSaid moveTolerate
Switching section(27a) and in loading mode
The other reel base (3) is driven by the rotational force of the driving rotary body.
Regulates the movement of idlers that are trying to move planets in the direction
Regulation part (27d)Be formed continuously
It is characterized by the following.

Further, in the above means, the switching member (2
1) includes the other reel base (3) during loading.
A stopper (29) for preventing the rotation of
When the switching member (21) moves to the loading mode position, the stopper moves to a position where rotation of the other reel base (3) is stopped.

[0009]

In the above means, the position of the switching member is switched to the play mode position, the stop mode position, the tape loading position , and the unloading mode position by using, for example, a rotary cam. When the switching member is at the play mode position, the idler can move in either direction of the two reel bases, the idler planetarily moves in accordance with the rotation direction of the drive rotating body, and the supply side reel base in the play mode. Transmission of power to the take-up reel base and power transmission to each reel base in the fast-forward / rewind operation are enabled. When the switching member is in the stop mode position, the idler cannot move in any direction of the reel base. The A down-loading mode in addition, idler Ri viewed movably name of the one reel base direction, the magnetic tape of the idler by the rotation of the drive rotor to drive one of the reel stand by planetary movement, has been drawn Rewind this
Can be. In the loading operation, the idler is
Movement in the direction of the
Even if you keep spinning, both reel bases are given rotational force
Can be prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a mechanical portion of a rotary head type tape player for DAT, and FIGS. 2 and 3 are partially enlarged plan views showing the position of a switching member for each operation. FIG. 1 shows the tape loading / unloading mode.
FIG. 2 shows the play mode, and FIG. 3 shows the stop mode.

In FIG. 1, a supply-side reel base 2 and a take-up reel base 3 are rotatably provided on a chassis 1. The reel base 2 is integrally provided with a reel gear 2a, and the reel base 3 is integrally provided with a reel gear 3a. When the cassette pack C is loaded on the chassis 1, the hub portions of the tape reels R1 and R2 in the cassette pack C are set on the reel tables 2 and 3, respectively.

A rotary head device 4 is provided on the chassis 1, and a rotary drum having a magnetic head mounted thereon is driven to rotate by a motor. Rotating head device 4
The capstan 5 is provided on the side of the capstan 5 and is rotated by a capstan motor M1. Drawer bases 6 and 7 are provided on the chassis 1, and drawer posts 6a and 7a and inclined posts 6b and 7 provided respectively.
b, and the magnetic tape T in the cassette pack C is pulled out by the post 8 and wound around the rotary head device 4 at a predetermined winding angle.

A drive gear 12 is provided at an intermediate position between the two reel bases 2 and 3, and is rotatably provided on the chassis 1 by a shaft 11. A pulley is provided coaxially with the drive gear 12, and the pulley and the capstan motor M1
A belt is hung between the pulley of the output shaft (the pulley at the base of the capstan 5), and the driving gear 12 is driven in the CW direction and the CCW direction by the power of the capstan motor M1. A slip clutch is interposed between the drive gear 12 and a pulley coaxial with the drive gear 12, so that when the load is large, the drive gear 12 and the pulley coaxial with the drive gear 12 slide with each other. An idle arm 13 is swingably supported on a shaft 11 of the drive gear 12, and an idler 14 is rotatably supported on a shaft 15 provided on the idle arm 13. The idler 14 is formed by integrating a large gear 14a and a small gear 14b, and the large gear 14a meshes with the drive gear 12. A rotational frictional force is applied between the idle arm 13 and the idler 14 so that the idler 14 can move in a planetary manner according to the rotation direction of the drive gear 12.

Reference numerals 16 and 17 are intermediate gears. The intermediate gear 16 includes a small gear 16a and a large gear 16b, and the small gear 16a meshes with the reel gear 2a of the supply-side reel base 2. The structure of the intermediate gear 17 is the same, and the small gear 1 meshing with the reel gear 3a of the take-up reel base 3
7a and a large gear 17b joined thereto.

The small gear 14b of the idler 14 is located between the large gears 16b and 17b of the intermediate gears 16 and 17, respectively. Therefore, when the idler 14 is in the free state, when the drive gear 12 is driven in the CW direction, the idler planetarily moves in the CW direction, and the small gear 14 b and the large gear 1 are moved.
The power of the drive gear 12 is transmitted to the reel gear 2a via the idler 14 and the intermediate gear 16, and the supply-side reel base 2 is driven in the CCW direction. Conversely, when the drive gear 12 is driven in the CCW direction, the idler 14
The planetary gear moves in the W direction to engage the small gear 14b and the large gear 17b, and the driving force of the drive gear 12 is transmitted to the reel gear 3a via the idler 14 and the intermediate gear 17, and the reel base 3 on the winding side moves in the CW direction. Driven.

A switching member 21 is provided on the chassis 1. The switching member 21 is connected to the intermediate gears 16 and 17.
Shafts 22 and 23 and guide pin 2
4 and is slidable in the vertical direction (AB direction) in the figure. The switching member 21 is always urged in the direction B by a return spring 25 supported by the chassis 1.

A switching groove 27 is formed substantially at the center of the switching member 21, and the shaft 15 of the idler 14 is inserted into the switching groove 27. The switching groove 27 includes a first switching portion 27a, a second switching portion 27b, and a third switching portion 27c in this order from the lower side in the figure. In FIG. 1, the first switching portion 27a is located at the position of the shaft 15, the shaft 15 can move only in the left direction in the figure, and the idler 14 can move planetary only in the CW direction. Also, the edge 27d is
In the regulation section that regulates the planetary movement of Dora 14 in the CCW direction
is there. In FIG. 3, the second switching portion 27b is located at the position of the shaft 15, the shaft 15 is restrained so as not to move in both directions, and the idler 14 cannot move to the planet. In FIG. 2, the third switching portion 27c is located at the position of the shaft 15, the shaft 15 can move in any direction, and the idler 14
And CCW can be moved in both directions.

A drive lever 31 is rotatably supported by a shaft 32 on the chassis 1. The driving section 31 a at the tip of the driving lever 31 is provided with a pin 28 provided on the switching member 21.
It is locked to. On the other hand, a follower 31 b is provided at the base of the drive lever 31, and the follower 31 b contacts the outer periphery of the control cam of the rotating cam 33. Rotating cam 3
Although the detailed shape of 3 is omitted, when the rotating cam 33 rotates about the shaft 34, the trajectory of the follower 31b changes according to the rotation phase, and the driving section 31a of the driving lever 31
Are switched to the positions shown in (1), (2) and (3). Although the switching member 21 is urged in the direction B by the return spring 25, the pin 28 is locked to the driving portion 31a, so that the driving portion 31a of the driving lever 31 has (1) and (2).
The position of the switching member 21 in the AB direction is set according to the position (3).

Further, a lock claw 29 is integrally provided on the lower right edge of the switching member 21 in the figure, and this lock claw 29 faces the small gear 17 a of the intermediate gear 17. In FIG. 1, the switching member 21 is moved most in the direction A, the lock claw 29 is engaged with the small gear 17a, and the reel base 3 on the winding side is locked. An intermediate gear 35 is meshed with the rotating cam 33.
Is driven by the cam motor M2.

Each mode control of the rotary head type tape player is performed by a control section 41 mainly composed of a CPU. The motor drivers 42 and 43 are controlled based on the program set in the control unit 41, and the capstan motor M1 and the cam motor M2 are driven. The rotation phase of the rotation cam 33 is detected by a rotation angle detector 44, and the detection information is sent to the control unit 41.

Next, the operation of the above embodiment will be described. (Tape Loading / Unloading Mode) In the tape loading / unloading mode, the rotational cam 33 is set to a predetermined rotational phase by the rotational force of the cam motor M2, and the drive lever 31 is driven in a counterclockwise direction to drive the drive unit 31a. Stops at the position shown in (1). This state is as shown in FIG.
The switching member 21 is moved the most in the direction A by the first drive unit 31a, and the switching member 21 is stopped at that position.

At this time, the first switching portion 27a of the switching groove 27 formed in the switching member 21 has moved to the position of the shaft 15. With the groove shape of the first switching portion 27a, the rightward movement of the shaft 15 in the figure is prevented, and the leftward movement of the shaft 15 is allowed.

This tape loading operation is performed by the control unit 4
The control operation at this time is shown by a flowchart in FIG. 4, when the tape loading command is given to the control unit 41 (step S1), the motor driver 43 is controlled cam motor M2 is driven (step S 2). Then, the rotary cam 33 rotates, and the drive lever 31 is moved by this cam shape. The rotation phase of the rotation cam 33 is detected by the rotation angle detector 44, and in step S3,
Based on the detection information from the rotation angle detector 44, it is monitored whether or not the drive phase of the drive unit 31a of the drive lever 31 reaches the position (1).

When the driving section 31a reaches the position (1) and the switching member 21 is moved to the position shown in FIG. 1, that is, in the direction A, the capstan motor M1 is driven in the CCW direction (step S4). As a result, the drive gear 12 is driven in the CCW direction, the idle arm 13 is provided with a turning force in the CCW direction, and the idler 14 attempts to planetarily move in the CCW direction. However, the first of the switching grooves 27 of the switching member 21
Since the switching portion 27a prevents the shaft 15 from moving rightward in the drawing, the rotation of the drive gear 12 in the CCW direction causes the shaft 15 to abut on the right edge 27d of the first switching portion 27a in the drawing. As a result, the drive gear 12 and the pulley coaxial with the drive gear 12 (to which power from the motor M1 is applied) continue to slip. Therefore, the small gear 14b of the idler 14 does not mesh with the large gear 16b of the intermediate gear 16, and does not mesh with the large gear 17b of the intermediate gear 17. Further, as shown in FIG. 1, the lock claw 29 provided on the switching member 21 meshes with the small gear 17a of the intermediate gear 17, and
In addition, the reel base 3 on the winding side is locked.

In the embodiment shown in FIG.
And 7 are driven by another driving cam provided on the rotating cam 33. Therefore, when tape loading is started in step S5, the rotating cam 33 continues to rotate after that,
Meanwhile, the driving lever 3 is controlled by the control cam shape of the rotating cam 33.
1 is maintained in the position of (1). In the tape loading operation, the tape pull-out bases 6 and 7 are moved, and the magnetic tape is drawn upward in the drawing by the pull-out posts 6a and 7a and the inclined posts 6b and 7b, and is wound around the rotary head device 4. Since the table 2 is in a free state, the magnetic tape T is pulled out from the tape reel R1 on the supply side. When the completion of the tape loading is detected in step S6, the motors M1 and M2 are stopped in step S7.

Next, in the tape unloading operation,
The cam motor M2 rotates in the reverse direction, and the rotary cam 33 rotates in the direction opposite to the direction at the time of loading, and the drawer bases 6 and 7 and the post 8 are returned downward in the drawing. During this time, the positions of the drive lever 31 and the switching member 21 are changed according to the shape of the rotating cam 33 as shown in FIG.
Will be maintained.

At this time, the capstan motor M1
It rotates in the W direction, and the drive gear 12 is driven in the CW direction. Accordingly, the idler 14 planetarily moves in the CW direction, the small gear 14b meshes with the large gear 16b of the intermediate gear 16, the reel base 2 is driven in the CCW direction via the intermediate gear 16, and the unloaded magnetic tape is supplied to the supply side. On the tape reel R1.

(Play Mode / FF / REW Mode) In the play mode or the like, the rotation cam 33 is rotated by the cam motor M2, and the drive portion 31a of the drive lever 31 is moved to the position (3) by the shape of the control cam. , The cam motor M2 stops. Drive lever 31
Is determined by detecting the rotation phase of the rotation cam 33 by the rotation angle detector 44.

When the drive unit 31a is at the position (3), the switching member 21 is at the position most returned in the direction B as shown in FIG. At this time, the third groove 27 of the switching member 21
The switching portion 27c is located at the position of the shaft 15, and the shaft 15 can move in both the left and right directions in the figure. The lock claw 29 provided on the switching member 21 is separated from the small gear 17 a of the intermediate gear 17.

Thus, the drive gear 12 is driven by the capstan motor M1. When the drive gear 12 rotates in the CW direction or the CCW direction, the idler 14
The planet moves in both directions in the CW direction. When the drive gear 12 is driven in the CW direction, the small gear 1 of the idler 14
4b meshes with the large gear 17b of the intermediate gear 17, and the reel base 3 on the winding side is driven in the CW direction. When the drive gear 12 is driven in the CW direction, the small gear 14b of the idler 14 meshes with the large gear 16b of the intermediate gear 16, and the supply reel base 2 is driven in the CCW direction.

In the recording or reproduction play mode, the magnetic tape T is wound by the reel base 3 on the winding side, and the magnetic tape T is fed by the capstan 5 at a predetermined speed.
At the same time, data is reproduced or recorded by the rotary head device 4. In the state shown in FIG. 2, if the capstan motor M1 is driven at high speed in the CW or CCW direction, the reel base 2 or 3 is driven at high speed, and the tape is fast-forwarded (F
F) or rewind (REW).

(Stop Mode) In the stop mode, the rotating cam 3 is driven by the cam motor M2.
3 is changed, and the driving portion 31 of the driving lever 31 is changed.
The position a becomes the position (2), and the switching member 21 stops at the position shown in FIG. 3, that is, the intermediate position between the movements in the directions A and B. At this time, the shaft 15 of the idler 14 is restrained by the second switching portion 27b of the switching groove 27, so that the shaft 15 cannot move in any of the left and right directions. Therefore, the idler 14 cannot perform planetary movement in any of the CW and CCW directions.
The fourth small gear 14b is held at the neutral position of the large gears 16b and 17b of the left and right intermediate gears, and power is not transmitted to any of the reel bases.

The present invention is not limited to the above embodiment. For example, the object restricted by the switching groove 27 formed in the switching member 21 is not necessarily the shaft 1 of the idler 14.
The protrusion is not limited to 5 and may be a pin or a bent portion provided on another portion of the idle arm 13.
A groove similar to the switching groove 27 is formed in the idle arm 13, and the same switching operation can be performed even when a pin provided on the switching member 21 is inserted into the groove of the idle arm 13.

In the illustrated embodiment, the intermediate gears 16 and 1
Although the intermediate gear 7 is provided, a structure in which the idler directly meshes with each reel gear 2a or 3a by planetary movement without providing the intermediate gear may be used. Further, rollers that press against each other may be used instead of the gears. Further, the switching member 21
Alternatively, a brake shoe may be provided in place of the lock claw 29 and pressed against the brake shoe. Further, the lock claw 29 or the brake shoe may directly contact the reel base 3.

[0035]

[Effects of the Invention] As described above, according to the present invention, the play mode,
Switching of power transmission to the reel base in the stop mode and the tape loading / unloading mode becomes possible. Therefore, the structure on the chassis can be simplified, and the control operation for switching can be simplified.

According to the second aspect of the present invention, since one of the reel bases can be locked by moving the switching member, a mechanism for locking the reel bases is not required.

[Brief description of the drawings]

FIG. 1 is a plan view showing a power switching mechanism of a rotary head type tape player according to the present invention.
This shows an unloading mode.

FIG. 2 is a partially enlarged plan view showing an operation of a switching member;
The play mode is shown.

FIG. 3 is a partially enlarged plan view showing an operation of a switching member;
This shows the stop mode.

FIG. 4 is a flowchart illustrating control during a tape loading operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chassis 2 Supply-side reel stand 2a Reel gear 3 Take-up reel stand 3a Reel gear 4 Rotating head device 5 Capstan 6,7 Pull-out base 12 Drive gear 13 Idle arm 14 Idler 16,17 Intermediate gear 21 Switching member 27 Switching groove 31 Drive Lever 33 Rotating cam

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-177546 (JP, A) JP-A-2-101333 (JP, U) JP-A-59-56658 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. A pair of reel stands (2, 3) on which a tape reel is installed, and a rotary head (4) having a magnetic head.
And a tape pull-out member (6, which pulls out the magnetic tape wound around the tape reel and winds the magnetic tape around the rotary head .
7) and a driving rotator driven in the forward and reverse directions by a motor
(12) an idler (14) joined to the driving rotator so as to transmit power, planetary in accordance with the rotation direction of the driving rotator, and selectively transmitting power to the pair of reel stands;
In the rotary head type tape player bets is provided, at least the play mode for reproducing operation, the stop mode, lead to Rodi the tape from the tape reel
Ring mode, switching member whose position is changed in each mode A down-loading mode to rewind the tape to the tape reel
(21) is provided, this switching member (21), the switching unit to allow the planetary movement to both reel base direction of the idler when the play mode (27c) of the idler when the stop mode switching unit that prevents the planetary movement to both reel table direction (27b), one of the reel stand by the rotational force of the driving rotator at a down-loading mode
(2) The above-mentioned movement of the idler that is going to move in the direction of the planet.
Switching section (27a) that allows
The other reel by the rotational force of the driving rotator
Said idler trying to planetary move in the direction of the platform (3)
A power switching mechanism for a rotary head type tape player, wherein a restricting portion (27d) for restricting movement is formed continuously. 2. A switching member (21) having a stopper for preventing rotation of the other reel base (3) during loading.
(29) is provided, said stopper said when the switching member (21) is moved to the loading mode position
The other reel table (3) according to claim 1 rotary head type tape player power switching mechanism according to move the rotation to the position for stopping the.