JPH05307795A - Component moving device - Google Patents

Abstract

PURPOSE:To reduce a driving load for a cam in the case a 1st member is moved with the continuous rotation of the cam by making the constitution in such a manner that the movement is temporarily discontinued at the intermediate time of the movement to get a 2nd member to move during that time. CONSTITUTION:In a tape recorder, the members relating to the setting of plural operation modes are driven by the rotation of the cam 25. Omitted tooth parts 25a, 25b are provided at both end parts of the cam 25, and a driving lever 26 is oppositely faced at the surface side of the cam 25, and a rotation end part of a trigger lever 16 is oppositely faced at the lower face side. By this constitution, when the cam 25 is rotated, the driving lever 26 is rotated a little then temporarily stopped. During this stopping period, the trigger lever 16 is rotated, then after the rotation is stopped, the driving lever 26 is rotated again. Thus, the large driving loads of the driving lever 26 and trigger lever 16 are not exerted simultaneously to the cam 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member moving device for moving a member for setting a mode of a tape recorder by a cam.

[0002]

2. Description of the Related Art A tape recorder has a pair of reel shafts, a tape is wound between the pair of reel shafts, and the reel shafts are rotated forward and backward to rotate the tape. -Pop is designed to run in one direction or the other.

In pre-mode, the head is moved to contact the tape by operating the mode setting-related member, and in the stop mode, the head is moved in the opposite direction. It is designed to be separated from the tape.

The mode setting member is composed of a plurality of turning levers, and the turning levers are operated by the turning of the cam.

[0005]

However, in the prior art, since the plurality of rotation levers constituting the above-mentioned mode setting related member are simultaneously operated by the rotation of the cam, a plurality of rotation levers corresponding to the cam are operated. The loads acted simultaneously to increase the driving load, which was prone to failure and increased power consumption, which was uneconomical.

Further, there are drawbacks such that the size of the lever including the motor and the diameter of the cam become large, and the operation of the apparatus becomes slow.

Therefore, an object of the present invention is to provide a member moving device capable of moving the first and second members alternately with a time difference.

[0008]

In order to solve the above-mentioned problems, the present invention moves a first member from a predetermined first position to a predetermined second position by continuously rotating a cam. In, the cam is configured in a predetermined shape corresponding to a part of a predetermined section between the first position and the second position,
Even if the cam rotates in the predetermined section, the movement of the first member is stopped, and the second member different from the first member is moved by the cam in the meantime.

[0009]

With the above structure, when the cam is rotated, the load for driving the first and second members does not act on the cam at the same time, and the cam operates in a distributed manner.
The driving load on the cam can be significantly reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a cam device provided in a center-capstan type tape recorder according to an embodiment of the present invention.

The cam device is provided with a cam gear 25 rotatably. The cam gear 25 is connected to a bidirectional drive motor (not shown) via the power transmission system 1.

The power transmission system 1 has a step gear 39 composed of a small diameter gear portion 39a and a large diameter gear portion 39b, an idler gear 4 meshing with the large diameter gear portion 39b of the step gear 39,
Besides, it is composed of a flywheel (not shown) and a drive belt connecting the flywheel to the drive motor.

The cam gear 25 is adapted to mesh with the small-diameter gear portion 39a of the step gear 39. Toothless portions 25a and 25b are formed on both sides of the cam gear 25.
Every time it is rotated by 0 °, it faces the small-diameter gear portion 39a of the stepped gear 39 and is stopped from rotating.

Further, a first side is provided on the surface side of the cam gear 25.
The drive lever 26 as a member of the above is opposed. The drive lever 26 is rotatably supported by a support shaft 27. A coil spring 28 is attached to the drive lever 26.
And the drive lever 26 is biased by the coil spring 28 so as to rotate counterclockwise. A pin 49 is projectingly provided on the lower surface of the drive lever 26. The pin 49 is in contact with the cam surface of the first cam portion 74 on the front surface side of the cam gear 25 described later.

Further, the rotating end edge of the interlocking lever 29 is in contact with the lower end of the drive lever 26 in the figure. The interlocking lever 29 is rotatably supported by a support shaft 90. Engagement holes 45 are formed on the rotating portion side of the interlock lever 29, and guide pins 88 projecting from both ends of a magnetic head support plate (not shown) are engaged with the engagement holes 45. There is.

On the other hand, on the lower surface side of the stepped gear 39, a delay rotation lever 41 is coaxially rotatable.
A pin 47 is provided so as to project upward on one end portion side of the delay rotation lever 41, and a stopper portion 42 is formed on the other end portion side thereof. A coil spring 43 is connected to the delay turning lever 41, and the delay turning lever 41 is biased to rotate clockwise. Rotation lever 41 for delay
The pin 47 of the second side of the second side of the cam gear 25 which will be described later.
Is in contact with the cam portion of. The rotation lever for delay 41
The stopper portion 42 of the rotary lever 2 abuts one of the rotary end portions of the rotary lever 2 provided with the idler gear 4 to temporarily restrict the rotation, and the other idler gear (not shown) is released. The magnetic tape is prevented from running before the head comes into contact with the magnetic tape so as not to mesh with the gear.

The lower end of the cam gear 25 is opposed to the pivot end of a trigger lever 16 as a second member. A pin 19 is provided so as to project upward at the rotating end of the trigger lever 16, and the pin 19 is in contact with a second cam portion on the back surface side of the cam gear 25, which will be described later.

As shown in FIG. 5, the trigger lever 16 is rotatably supported by a support shaft 17, and the other end portion of the trigger lever 16 is an operator 1 of a self-holding solenoid 11.
It is connected to 2. The self-holding solenoid 11 holds the operating element 12 by a magnetic force and is energized to release the holding of the operating element 12.

The trigger lever 16 has first and second triggers.
Rotation levers 13 and 14 of the above, and these first and second rotation levers 13 and 14 are rotatably supported by the same support shaft 17. A main coil spring 18 is connected to one end side of the first rotation lever 13 so that the first rotation lever 13 is biased to rotate counterclockwise. Furthermore, the first and second rotation levers-13,1
An auxiliary coil spring 18a is installed between the other end portions of the four, and both are elastically connected.

Further, the first and second rotation levers-1
A wire spring 20 is interposed between the wires 3 and 14, and the wire spring 20
Is a rotation type lever 1 in which a spring force is charged in a direction in which one end of the second rotating lever 14 is pressed downward in the drawing.
It is attached to 3.

A cam switch for detecting the rotational position of a cam (not shown) which is turned on / off by the rotation of the delay rotation lever 41 is provided in the vicinity of the delay rotation lever 41. There is.

On the other hand, inside the tape recorder, there is disposed a magnetic head support plate (not shown) extending along the pinch roller / magnetic head insertion window of the tape cassette (not shown). The above-mentioned cam devices are arranged on both ends of the magnetic head support plate, and the magnetic head support plates are operated by these cam devices so that the magnetic head is brought into contact with and separated from the magnetic tape.

By the way, a first cam portion 74 is formed on the surface of the cam gear 25 as shown in FIG. 3 (the shape of the gear and the toothless portion are omitted to mainly show the cam shape), and the first cam portion 74 is formed. The pin 49 of the drive lever 26 is in contact with the cam surface of the cam portion 74. A groove 79 is formed in the first cam portion 74, and the inner cam surface 74 is formed along the groove 79.
a and an outer cam surface 74b are provided.

As shown in FIG. 4, a second cam portion 77 is formed on the rear surface of the cam gear 25, and the second cam portion 77 has an inner cam surface 77a and an outer cam surface 77.
b is provided. The pin 19 of the trigger lever 16 is brought into contact with the inner cam surface 77a of the second cam portion 77, and the delay rotary lever is provided on the outer cam surface 77b.
The pin 47 of 41 is abutted. The outer peripheral teeth of the cam gear 25 have 180 ° at predetermined positions 25a and 25b.
The toothless portions 25a and 25b are provided at two positions spaced apart from each other, and the through holes 25c and 25d are provided in the vicinity of each of the toothless portions 25a and 25b and in the portions which overlap the cam groove 77C in a plane.

Next, the positional relationship between the cam gear 25 and the pins 49, 19, 47 of the drive lever 26, the trigger lever 16 and the delayed rotation lever 41 in the rotation of the cam gear 25 is shown in FIG. Description will be given based on the cam diagram.

First, the end face of the pin 49 of the drive lever 26 on the center side of the cam gear 25 is as shown by the line a while the cam gear 25 is rotated 0 ° to 80 ° from the reference position shown in FIG. It is about 4mm away from the center of 25,
During the rotation of 80 ° to 100 °, it enters the cam groove 79 in the recording / reproducing mode and moves to a position about 1.8 mm away from the center of the cam gear 25 as indicated by the line a1, fast forward and rewind. It does not enter the cam groove 79 at the time of mode, and is located at a position about 3.2 mm away from the center of the cam gear 25 as indicated by the line a2. Furthermore, the cam gear 25 is 1
It is at a position about 1.8 mm away from the center of the cam gear 25 in the recording / reproducing mode while it is rotated from 00 ° to 210 °, and about 4 mm away from the center of the cam gear 25 in the fast-forwarding / rewinding mode. In position. Further, the pin 49 moves in a direction away from the center of the cam gear 25 while the cam gear 25 is rotated from 210 ° to 245 °, and
While being carefully rotated from 45 ° to 265 °, the movement is stopped, and from 265 ° or more, it moves again in a direction far away from the center of the cam gear 25.

Further, the pin 19 of the trigger lever 16 is b while the cam gear 25 is rotated from the reference position shown in FIG. 4 (the position of the cam gear 225 is the same as that of FIG. 3) 0 ° to 20 °.
As indicated by the line, it moves to a position about 3.5 mm away from the center of the cam gear 25 and moves toward the center of the cam gear 25 while being rotated 20 ° to 70 ° to a position about 1.5 mm away. Yes, while rotating between 70 ° and 120 °, the cam gear 25, as shown by the line b2, in the fast forward and rewind modes.
It moves to a position about 3.5 mm away from the center of the cam gear, and does not move away from the center of the cam gear 25 at the time of recording and reproducing mode as shown by b1 and remains at a position apart from the center of the cam gear 25 at 120 °. From 140 to 140 °, fast forward,
About 1.5 from the center of the cam gear 25 in the rewind mode.
Move to a position separated by mm. In addition, the cam gear 25 is 140
The pin 19 is at a position about 1.5 mm away from the center of the cam gear 25 during the rotation of 180 ° to 180 °.
While it is rotated by 0 °, it moves in a direction away from the center of the cam gear 25 and is at a position about 3.5 mm away from 200 ° to 2 °.
About 3.5 from the center of the cam gear 25 while it is rotated 30 °
It is located at a position separated by mm, moves toward the center of the cam gear 25 while being rotated by 230 ° to 270 °, and is at a position separated by about 1.5 mm, and is rotated by 270 ° to 360 °. It is about 1.5 mm away from the center of the.

The pin 47 of the delay lever 4 for delaying is separated from the center of the cam gear 25 as indicated by the line c while the cam gear 25 is rotated from 0 ° to 10 ° from the reference position shown in FIG. In the direction of about 4.8 mm away,
It is at a position about 4.8 mm away from the center of the cam gear 25 during the rotation of 135 ° to 135 °, and moves toward the center of the cam gear 25 at a position about 3 mm away from the center of the rotation of 135 to 170 °. Yes, it moves in a direction away from the center of the cam gear 25 while it is rotated by 170 to 200 °, and is at a position about 4.8 mm away from it, and about 4 mm from the center of the cam gear 25 while it is rotated by 200 to 335 °. Located at a distance of 8 mm and 335
During the rotation of up to 360 °, the cam gear 25 moves toward the center of the cam gear 25 and is at a position separated by about 4.5 mm.

Here, the cam gear 25 is 210 ° to 230 °.
° During rotation, pin 49 of drive lever 26
Moves, but the pin 19 of the trigger-lever 16 is stopped.

Further, the cam gear 25 has a rotation angle of 245 ° to 26 °.
During the rotation of 5 °, pin 4 of the drive lever 26
The movement of 9 is stopped, and the pin 19 of the trigger lever 16 is moved.

Further, the cam gear 25 is 265 ° to 360 °.
° During rotation, pin 49 of drive lever 26
Moves, but the pin 19 of the trigger-lever 16 is stopped.

That is, the cam gear 25 is 210 ° to 36 °.
During the rotation of 0 °, the drive lever 26 and the trigger lever 16 are not simultaneously operated, but are alternately operated with a time difference.

In the tape pre-coder according to the embodiment of the present invention constructed as described above, the operation button (not shown) for the pre-mode exposed on the outer surface of the exterior housing is operated. Then, when the play mode is set, the bidirectional motor (not shown) operates to rotate the step gear 39 via the power transmission system 1. At this time, the self-holding solenoid 11 is energized, and the holding of the operating element 12 is released. As a result, the trigger lever 16 is brought into a free state, and the trigger lever 16 is rotated counterclockwise about the support shaft 17 by the urging force of the coil spring 18, and the pin at the rotating end thereof is rotated. 19a moves outward to move the inner cam surface 77 of the second cam portion 77 on the rear surface side of the cam gear 25.
Kick a, and the cam gear 25 is rotated by a predetermined angle by the force. As a result, the toothless portion 25a of the cam gear 25 is moved so that the tooth portion meshes with the small-diameter gear portion 39a of the stepped gear 39 that is rotating clockwise, and the cam gear 25 rotates in the arrow direction. By the rotation of the cam gear 25, first, the rotation of the cam gear 25 causes the pin 19 of the trigger lever 16 to be returned inward by the cam surface 77a on the front side of the cam gear 25, and the trigger lever 16 is rotated clockwise. The solenoid 11 and the operating element 12 are suction-held. Next, the pin 49 of the drive lever 26 rotates the cam surface of the first cam portion 74 on the surface side of the cam gear 25, and the rotation of the cam gear 25 causes the inside of the pin of the trigger lever 16 to move to the cam surface 77a on the surface side of the cam gear 25.
Then, the trigger lever 16 is rotated clockwise, and the solenoid and the operating element 12 are suction-held. When moved by a predetermined distance, the coil spring 28 urges into the groove 79 and moves along the inner cam surface 74a. This causes the drive lever 26 to rotate counterclockwise about the support shaft 27.
Due to this rotation, the rotation restriction of the interlocking lever 29 is released, whereby the magnetic head supporting plate together with the pinch roller lever is rotated by the spring with the other guide pin as the center of rotation and the pinch roller of the tape cassette is rotated. / The head contacts the magnetic tape by turning toward the magnetic head insertion window.

The above rotation of the pinch roller lever causes the pinch roller to be inserted into the pinch roller / magnetic head insertion window to press the magnetic tape onto the capstan and cooperate with the capstan. It stops by working and pinching.

As described above, after the head is brought into contact with the magnetic tape, the cam gear 25 is rotated, so that the pin 47 of the delay rotation lever 41 is moved to the second side on the rear surface side of the cam gear 25.
Is rotated by the cam portion 77b of the rotary lever for delay-4
7 is rotated counterclockwise, and the stopper portion 42 thereof is separated from the rotation lever-2. As a result, the rotation lever-2 further rotates by a predetermined angle, the other idler gear (not shown) meshes with the reel gear, and the reel gear rotates. By this rotation, the magnetic tape runs without sagging, and the recording / reproducing head picks up the signal and sends it to an electric circuit (not shown).
Play from mosquito. At this time, the cam gear 25 has a rotation angle of 18
0 °, the pin 19 is stopped by the stopper 50a, and at this time,
The defective portion 25b of the cam gear 25 faces the step gear 39, and the cam gear 25 stops.

When setting the fast-forward mode,
2 operation buttons for fast forward and rewind mode settings not shown
Press continuously for one time.

The operation in the fast-forward mode is the same as the operation in the pre-mode described above until the middle thereof.

That is, in the pre-mode, the cam gear 25 is rotated and the pin 49 of the drive lever 26 is moved a predetermined distance along the cam surface, so that the groove 79 of the first cam portion 74 is inserted. Although it has fallen, in the fast-forward mode, the self-holding solenoid 11 is energized for a second time before that, and the holding of the trigger lever 16 is released, and the trigger lever-1 is released.
6 again rotates outward, that is, in the direction of the arrow. As a result, even if the drive lever 26 tries to rotate in the counterclockwise direction, the rotating end portion 16a of the trigger lever 16 comes into contact with the falling piece 26a provided at the end portion of the drive lever 26, and the rotation thereof occurs. Movement is regulated. Therefore, the rotation of the interlocking lever 29 is also restricted, the magnetic head support plate does not operate together with the pinch roller lever, and the recording / reproducing head is positioned in a state of being separated from the magnetic tape. ..

As described above, when the cam gear 25 is further rotated with the recording / reproducing head being separated from the magnetic tape, the pin 47 of the delaying rotation lever 41 is now attached to the rear surface of the cam gear 25b. Side second cam surface 77 of second cam portion 77
7b, and the lever for delay rotation 41 is rotated in the counterclockwise direction, whereby the other idler gear meshes with the reel gear and the reel gear is rotated, and the magnetic gear is rotated. -The spool is wound up at high speed.

In the rewind mode, the rotation direction of the bidirectional driving motor is opposite to that in the fast forward mode, and the other cam device operates in the same manner as in the fast forward mode.

Next, the case where the above-mentioned pre-mode is changed to the stop mode will be described.

In this case, a stop mode setting button (not shown) is pressed.

As a result, the self-holding solenoid 11 is energized, the trigger lever 16 is again moved outward, and the pin 19 of the trigger lever 16 moves the second cam portion 77 of the cam gear 25.
The first cam surface 77a is kicked to rotate the cam gear 25, meshes with the small-diameter gear portion 39a of the rotating stage gear 39, and starts rotating after 180 °.

On the other hand, the second cam portion 77 makes the first cam surface 7
As the cam gear 25 is kicked by 7a and the cam gear 25 is turned, the delay turning lever 41 is turned clockwise by the pin 47 moving away from the center of the cam gear.

At this time, the stage gear 39 and the cam gear 25 are still in motion.
Then, the pin 47 kicks the inclined surface of the cam 77b and K1 by the force of the spring 43, and further rotates the cam gear 25 in the arrow direction.

By this rotation, after the pin 47 and the arc portion K 2 of the cam 77b having a constant distance from the center of the cam gear are engaged, the step gear 39 and the cam gear 25 mesh with each other (indicated by a two-dot chain line in FIG. 4). In order to obtain the timing as described above, when the cam gear 25 provided at the end of the toothless portion 25b of the cam gear 25 is rotated, the first meshing tooth T1 is the other normal T2, T3 as shown in the drawing. Has a different shape from.

That is, in the relation with the tooth T2 provided adjacently, the pitch is narrower than that in the other ordinary relation between the teeth T1 and T3, and (P '<P) Is also different.

Therefore, the tooth T1 not only has the effect of adjusting the above-mentioned timing, but also functions to smoothly mesh with the step gear 39 due to the elastic force due to the existence of the through hole 25d. The elastic effect described above is greater when the cam gear 25 is made of synthetic resin such as plastic.

The through hole 25c is also formed in the cam gear 25 in the same manner.
This is to give the teeth elasticity.

In the figure, 50a and 50b are brought into contact with the pin 19 to move the cam gear 25 at the turning angles of 0 ° and 1 °.
It is a stopper for stopping each at 80 °.

By the rotation of the cam gear 25, first, the pin 49 of the drive lever 26 is moved to the cam gear 25.
6 is rotated from 210 ° to 245 °.
As shown in the cam diagram of FIG. 1, the movement is stopped in the direction away from the center of the cam gear 25, and the movement is stopped during the rotation from 245 ° to 265 °, and the movement is further increased from the center of the cam gear 25 from 265 ° or more. Move away from you.

At this time, the pin 19 of the trigger lever 16 stops moving while the cam gear 25 is rotated from 210 ° to 230 °, as shown in the cam diagram of FIG. During the rotation from 270 ° to 270 °, the cam gear 25 moves in a direction approaching the center of the cam gear 25,
The movement has stopped from above.

As described above, the cam gear 25 is 210 °
To 245 °, pin 4 of the drive lever 26
When 9 moves away from the center of the cam gear 26, the drive lever 26 rotates clockwise and the interlocked lever 2 moves.
Rotate 9 counterclockwise. This makes pinch-ro
The lever is slightly retracted against the biasing force of the spring to separate the pinch roller from the magnetic tape.

In this way, the pinch roller is slightly magnetized.
The cam gear 25 from 245 ° to 2 °
The rotation of the drive lever 26 is stopped until it is rotated by 65 °.

While the rotation of the drive lever 26 is stopped, that is, the cam gear 25 moves from 245 ° to 2 °.
During the rotation of 65 °, the trigger lever 16 rotates inward against the urging force of the spring 18 and becomes 265
When the angle exceeds, the rotation of the trigger lever 16 is stopped. In this way, after the rotation of the trigger lever 16 is stopped, when the cam gear 25 is rotated 265 ° or more, the drive lever 26 is again rotated largely clockwise and the pinch roller lever is retracted. To return the pinch roller to the initial position.

As described above, the drive lever 26 is slightly rotated by the rotation of the cam gear 25, then is temporarily stopped, and the trigger lever 16 is rotated while the drive lever 26 is stopped. After stopping the rotation of the lever 16,
Again, since the drive lever 26 is rotated again, the large drive loads of the drive lever 26 and the trip lever 16 do not act on the cam gear 25 at the same time, as shown in FIG.

That is, in FIG. 7, the line A shows the drive load when the drive lever 26 rotates, the line B shows the drive load when the trigger lever 16 rotates, and the line C shows the total drive load. Indicates.

In this way, the cam lever 25 is driven by the drive lever-2.
Since the large driving loads of 6 and the tri-lever 16 do not act simultaneously, the driving load of the cam gear 25 can be remarkably reduced.

Incidentally, the D line in FIG. 7 is a rotation lever 41 for delay.
The driving load at the time of rotation of the cam gear 25 is extremely small, and the influence on the cam gear 25 is negligible.

[0061]

As described above, according to the present invention,
In the one in which the first member is moved from the predetermined first position to the predetermined second position by the continuous rotation of the cam, a part of the predetermined section between the first position and the second position. Corresponding to the above, the cam is formed in a predetermined shape, and even if the cam rotates in the predetermined section, the movement of the first member is stopped, and during that time, the cam is different from the first member. Since the second member is moved, a plurality of high loads do not act on the cam at the same time, the total driving load can be reduced, and the power consumption can be reduced. Therefore, for example, there is an effect that the cam and the motor can be downsized.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a part of a tape recorder equipped with a member moving device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged plan view showing the state of the tape recorder of FIG. 1 in a stop mode.

3 is a plan view showing a first cam portion of a cam that constitutes the member moving device of FIG. 1. FIG.

FIG. 4 is a plan view showing a second cam portion of a cam which constitutes the member moving device of FIG.

5 is a trigger lever constituting the member moving device of FIG.
FIG.

6 is a cam diagram showing the movement of the pins of each lever when the cam constituting the member moving device of FIG. 1 is rotated.

FIG. 7 is a graph showing a change in driving load of each lever acting on the cam when the cam constituting the member moving device of FIG. 1 is rotated.

[Explanation of symbols]

16 ... Trigger lever (second member), 25 ... Cam, 2
6 ... Drive lever (first member).

Claims (1)

[Claims] 1. A device for moving a first member from a predetermined first position to a predetermined second position by continuous rotation of a cam, wherein the first member is provided between the first position and the second position. The cam is formed in a predetermined shape corresponding to a part of the predetermined section, and even if the cam rotates in the predetermined section, the movement of the first member is stopped, and the first member is stopped by the cam during the movement. The member moving device is characterized in that a second member different from the above member is moved.