JP2623167B2 - Actuator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a second operation unit that operates in response to a rotational force of an operation gear when the first operation unit stops operating due to an increase in load. The present invention relates to an operating section control device that operates the operating section of the present invention.

(Prior Art) When the operation of the first operating unit which operates by receiving the rotational force of the operating gear is stopped, the transmission of the rotational force by the operating gear is stopped in conjunction with this, and the second operating unit is simultaneously operated. There is a technology to operate. For example, in a tape recorder, when the rotational force of a motor is transmitted to a reel gear via an operating gear to drive the reel receiver to rotate and run the tape, when the tape reaches the end and the rotation of the reel receiver is stopped, Is detected, the rotation of the reel gear by the operating gear is stopped, and the head mounting plate is moved to separate the magnetic head from the tape.

Conventionally, when performing this type of operation control, generally, the end of operation of a first operating section (reel receiving) is detected by a detector, and a detection signal is input to the control section to output the first operating section. The transmission of rotational power to the motor is controlled to stop, and the second operating portion (head mounting plate) is controlled to operate.

(Problems to be Solved by the Invention) However, in order to perform such an operation control, a detector that detects the end of operation of the first operating unit, or a first detector that operates based on a detection signal of the detector to operate. A control unit that controls the driving of the operating unit and controls the start of operation of the second operating unit is required,
There was a problem that the configuration became complicated.

The present invention has been made in view of such circumstances,
Its purpose is to use no special detectors or controls,
When the operation of the first operating unit driven by the rotational force of the operating gear stops, the transmission of the rotational force by the operating gear is mechanically stopped in conjunction with the stop, and at the same time, the second operating unit is mechanically stopped. SUMMARY OF THE INVENTION An object of the present invention is to provide a simple and highly practical operating unit control device that can be operated at a high speed.

(Means for Solving the Problems) An operating unit control device according to the present invention is a movable unit having a movable transmission gear that transmits rotation of a driving gear to an operating gear that drives a first operating unit. The movable gear is provided at a position where the transmission gear meshes with the drive gear and the operating gear by an elastic member which is movable and biases the movable member. The movable member is elastically held. On the other hand, a second operating portion is provided so as to start operating when the movable member is displaced from the elastic holding position. When the operation gear stops rotating, the reaction force is received by the transmission gear so that the movable member is displaced from the elastic holding position, and when the second operation portion is operated, Movable member It is characterized in the provision of the interlocking member of separating the transmission gear by largely displaced against the elastic member from the actuating gear.

(Operation) According to the operating section control device configured as described above, the movable member that supports the transmission gear is elastically held by the elastic member at a position where the transmission gear meshes with the drive gear and the operation gear, respectively. Since the rotation of the drive gear is transmitted to the operation gear via the transmission gear to operate the first operation unit, the first operation unit is stopped, thereby stopping the rotation of the operation gear. Then, the transmission gear meshing with the rotation-stopped operation gear moves by receiving a reaction force from the operation gear with the rotation thereof, and the movable member that supports the transmission gear is displaced from the elastic holding position. I do. Then, the second operating portion is operated by the displacement of the movable member from the elastic holding position, and the interlocking member interlocked with the operation of the second operating portion greatly displaces the movable member against the elastic member, Move the transmission gear away from the working gear.

(Embodiment) Hereinafter, an embodiment in which an operating unit control device according to the present invention is applied to a tape slack eliminating device of a tape recorder will be described with reference to the drawings.

FIG. 1 is a plan view showing a mechanical part of the tape recorder with a cassette holder omitted. Tape recorder substrate 1
On the upper side, a pair of left and right reel receivers 2a and 2b are provided.
FIG. 2 and FIG.
As shown in the figure, the tape cassette C is loaded via the cassette holder 11. The right reel receiver 2b corresponds to a first operating unit according to the present invention. Reel gears 3a, 3b are provided below the reel receivers 2a, 2b, respectively, and the rotation of a motor 14 is selectively transmitted to these reel gears 3a, 3b as described later.

A head mounting plate 5 on which a magnetic head 4 is mounted is mounted on the tape recorder substrate 1 such that the head mounting plate 5 can reciprocate up and down in FIG. The head mounting plate 5 is urged by a torsion spring 6 in the forward movement direction (upward in the drawing). The head mounting plate 5 corresponds to a second operating section according to the present invention.

In the figure, reference numerals 7a and 7b denote a pair of left and right capstans driven to rotate in opposite directions, and reference numerals 8a and 8b denote pinch rollers corresponding to the respective capstans 7a and 7b. The pinch roller arms 9a, 9b supporting the pinch rollers 8a, 8b, respectively, are connected to the head mounting plate 1 via torsion springs 10, and each pinch roller 8a, 8b is moved in accordance with the forward movement of the head mounting plate 1. Move closer to Stan 7a, 7b. The torsion spring 10 moves to the left or right in FIG. 1 in conjunction with a tape running direction switching mechanism (not shown), and when the head mounting plate 5 moves to the reproducing operation position, the pinch rollers 8a and 8b are selected. To the corresponding capstans 7a and 7b.

2 and 3 are side views of the mechanism of the tape recorder shown in FIG. 1 as viewed in the direction of arrow II, and particularly show only a configuration related to the elevating operation of the tape cassette C. As shown in these figures, a cassette holder 11 is mounted on the upper surface side of the tape recorder substrate 1 via a connecting plate 11a so as to be vertically movable. This cassette holder 11
Allows the cassette C to be inserted and removed at the upper cassette insertion and removal position shown in FIG. In this position, when the cassette C is inserted into the cassette holder 11 from left to right in FIG. 1, the cassette holder 11 moves from the cassette insertion / removal position to the lower cassette loading position shown in FIG. Is loaded into both reel receivers 2a and 2b.

As shown in FIG. 1, a slide plate 12 is mounted on the upper edge of the tape recorder substrate 1 so as to be able to move in the left-right direction in FIG. This slide plate 12 is the cassette holder 11
(See FIGS. 2 and 3). When the cassette holder 11 moves from the cassette insertion / removal position to the cassette loading position, the motor holder 13 moves accordingly and switches the motor switch 13 from off to on. When the motor switch 13 is turned on, the tape drive motor 14 rotates. The rotation of the motor 14 is transmitted to the right reel gear 3b via a plurality of gears 15, 16, 17, 18, 19, 20, and 21 shown in FIG. 1 sequentially, and the right reel receiver 2b is driven. .

In practice, a rotation transmission path for reproduction operation for selectively transmitting the rotation of the tape drive motor 14 to the left and right reel gears 3a, 3b is also provided, but this is omitted in the drawings.

Now, among the above gears 15, 16, 17, 18, 19, 20, 21, reel gear
The three gears 19, 20, 21 near the 3b side correspond to the drive gear, the transmission gear, and the operation gear of the present invention, respectively. Thus, the operating gear 21 is always meshed with the right reel gear 3b, and the transmission gear 20 is supported by the movable member 22 so as to be able to contact and separate from the operating gear 21. The movable member 22 is rotatably supported by a shaft 22a on the tape recorder substrate 1, is elastically biased by an elastic member (torsion spring) 23, and is elastically held at a fixed position shown in FIG. The elastic holding position is a position where the transmission gear 20 is positioned in a rotation transmission path from the drive gear 19 to the operation gear 21, that is, a position where the transmission gear 20 meshes with the drive gear 19 and the operation gear 21, respectively.

On the other hand, a locking plate 24 is rotatably supported on the tape recorder substrate 1. The locking plate 24 and the movable member 22 are engaged with each other at engagement portions 24a and 22a, as shown in FIG. The engagement plate 24 has a left reel gear 3a.
And a locking portion 28 that engages with a step 27 of an opening 26 provided in the head mounting plate 5. The locking plate 24 having such a structure corresponds to the interlocking member according to the present invention. At the edge of the opening 26, an inclined surface 29 and a parallel surface 30 are provided continuously to the step 27.

When the movable member 22 rotates clockwise in FIG. 1, the locking plate 24 connected to the movable member 22 via the engaging portions 22a and 24a rotates counterclockwise. This locking plate 24
When the locking portion 28 is disengaged from the step portion 27 of the head mounting plate 5 by the rotation of the head mounting plate 5, the head mounting plate 5
To move forward (start operation). At this time, the inclined surface 29 of the head mounting plate 5 pushes the locking portion 28 to the right in FIG. 1, so that the movable member connected to the locking plate 24
22 is further rotated clockwise. As a result, the transmission gear 20 pivotally supported by the movable member 22 is displaced to a position completely separated from the operating gear 21, and the operating gear 21
The rotation transmission to the motor is interrupted.

An eject operation member 32 that can reciprocate in parallel with the slide plate 12 is mounted on the upper edge of the tape recorder substrate 1 in FIG. The ejection operation member 32 is constantly urged leftward in FIG. 1 by a return spring 33.

When the ejection operation member 32 is pushed in the right direction in FIG. 1 against the return spring 33, the bent piece 34 of the slide plate 12 is pushed by a part of the ejection operation member 32, and the slide plate 12 is ejected. It moves together with the operation member 32. However, when the eject operation member 32 is returned by the return spring 33, the slide plate 12 does not follow the return operation.

The slide plate 12 is provided with a pressing roller 35. When the slide plate 12 moves rightward in FIG. 1, the pressing roller 35 rotates the head return plate 36 which is rotatable.
Plays the role of pushing back the head mounting plate 5 downward.

Next, the operation of the embodiment apparatus configured as described above will be described.

1 and 2 in which the tape cassette C is not loaded, the movable member 22 is
20 is held at a fixed position (elastic holding position) where it meshes with the drive gear 19 and the operating gear 21, respectively. At this time, the rotation of the left reel receiver 2a is prohibited by the brake claw portion 25 of the locking plate 24, and the forward movement of the head mounting plate 5 is prohibited by the locking portion 28 of the locking plate 24.

In this state, when the tape cassette C in which the internal tape is slackened is inserted into the cassette holder 11, the cassette holder 11 moves to the cassette loading position, and the tape cassette C is loaded into both the reel receivers 2a and 2b. At this time, in conjunction with the movement of the cassette holder 11, the slide plate 12 turns on the motor switch 13 as shown in FIG. Then, the rotation of the motor 14 is transmitted from the gears 15 to 21 to the reel receiver 2b via the reel gear 3b, and the reel receiver 2b rotates to wind the tape T in the cassette C onto the right reel.

When the tape T in the cassette C is wound in this way and the slack is eliminated, the rotation of the left reel receiver 2a is prohibited by the brake claw 25 as described above, so that the right reel receiver 2a is rotated. The rotation of 2b is prohibited by the tension of the tape T, and as a result, the rotation of the operating gear 21 is also prohibited. However, as shown in FIG.
Is continuously applied to the transmission gear 20, so that the teeth 20a of the transmission gear 20 strongly push the side surfaces of the teeth 21a of the operation gear 21 as indicated by arrows in FIG. Then, the transmission gear 20 becomes the teeth 21 of the operation gear 21
Since it receives the reaction force from a, it is displaced clockwise about the shaft 22a together with the movable member 22.

The locking plate 24 rotates counterclockwise in conjunction with the rotation of the movable member 22, so that the brake claw 25 is disengaged from the reel gear 3a, and at the same time, the locking portion 28 is moved to the step 27 of the head mounting plate 5. And the head mounting plate 5 moves forward under the force of the torsion spring 6. By the forward movement of the head mounting plate 5, the locking plate 24 is further displaced by the inclined surface 29, and the movable member 22 is further rotated in conjunction with this. As a result,
As shown in FIG. 5, the transmission gear 20 is displaced to a position completely separated from the operation gear 21, and the rotation transmission to the operation gear 21 is interrupted.

One of the pinch rollers 8a (or 8b) is moved to the corresponding capstan 7a by the forward movement of the head mounting plate 5.
(Or 7b), and the magnetic head 4 contacts the tape T. Rotational force is alternatively transmitted from the motor 14 to the reel gear 3a or 3b via a rotation transmission mechanism for reproduction operation (not shown) different from the gears 15 to 21 described above, and the reproduction operation is started. You.

As described above, according to the embodiment, the reel receiver 2b is mechanically moved by the displacement of the movable member 22 that supports the transmission gear 20.
The head mounting plate 5 can be moved by detecting the rotation stop of the head, and the configuration is very simple.

(Effects of the Invention) As described above, the present invention has been described in detail based on the embodiment. According to the present invention, the transmission gear is pivotally supported by the movable member and elastically held at the meshing position with the operating gear. When the rotation of the operation gear stops along with the stop of the operation of the operation unit, the transmission gear meshing with the operation gear is moved and displaced together with the movable member, and the second operation unit is operated in conjunction with the movement displacement of the movable member. I try to make it. In conjunction with the operation of the second operating member, the movable member is further displaced to cut off the rotation transmission to the operating gear.

This eliminates the need for a detector that detects the end of operation of the first operating unit and a control unit that controls driving of the first operating unit and operation of the second operating unit based on a detection signal from the detector. ,
The switching of the operation from the first operating section to the second operating section can be mechanically and reliably performed with a simple configuration.

[Brief description of the drawings]

FIG. 1 shows an operating member control device according to an embodiment of the present invention. FIG. 1 is a plan view showing a mechanism of a tape recorder without a cassette holder, and FIGS. 2 and 3 are tape recorders, respectively. FIG. 1 is a side view showing the state before and after the cassette is loaded, as viewed from the direction of arrow II shown in FIG. 1, and FIGS. 4 and 5 are partial plan views showing the operation state of the embodiment apparatus, respectively. FIG. 7 is a plan view showing the relationship between the gear, the movable member and the elastic member, and FIG. 7 is a partially enlarged view showing the mutual relationship between the teeth of the transmission gear and the teeth of the operation gear. 2b Reel receiver (first operating part), 5 Head mounting plate (second operating part), 19 Drive gear, 20 Transmission gear, 21
…… Operating gear, 22 …… Movable member, 23 …… Elastic member, 24 ……
Locking plate (interlocking member).

Claims (1)

(57) [Claims] 1. An operating gear (21) for transmitting rotation of a drive gear (19) via a transmission gear (20), a first operating portion (2b) operated by a rotating force of the operating gear, A movable member (22) movably provided to support the transmission gear; and an elastic member (23) elastically holding the movable member at a position where the transmission gear meshes with the drive gear and the operating gear, respectively. A second operating part (5) which is actuated by the movable member which is displaced from the elastic holding position by receiving a reaction force of the operating gear stopped in rotation due to an increase in the load of the first operating part by the transmission gear; And an interlocking member (24) for displacing the movable member largely against the elastic member by the operation of the second operating portion to separate the transmission gear from the operating gear. Control device.