JPH05303798A - Tape running device - Google Patents

Abstract

PURPOSE:To make the tape running device simple in structure, small in size and low in cost by performing the running and mode setting of a magnetic tape with a single power transmission system. CONSTITUTION:At the time of setting a play mode, a bi-directional motor rotates an output pulley in the time direction. After a head is in contact with a magnetic tape, a cam gear 25b rotates to move a pin 49b of a delay rotation lever 41b at the back side cam of the gear 25b. A stopper 42b is rotated and separated from a bar 2 to stop by a stopper after rotating the prescribed angle. A 1st idler gear 3 is engaged with a 1st reel gear and rotated thereby a tape is drawn out from a reel to execute the reproduction. At the time of setting a fast-forwarding mode, a lever 47b is moved instead of a pin 49b of the lever 41b, thereby the tape is worked up at a high speed. At the time of setting an rewinding mode, the rotation direction of the bi-directional motor is made opposite to the fast-forwarding mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape running device for running a tape of a tape recorder.

[0002]

2. Description of the Related Art A tape recorder is provided with a pair of reel shafts. A tape is wound between the pair of reel shafts, and the reel shaft is rotated forward and backward so that the tape can be run in one direction or the other direction. Is becoming

Further, in the play mode, the head is moved to bring it into contact with the tape by operating the mode setting-related member, and in the stop mode or the fast-forward mode, the head is moved in the reverse direction to separate from the tape. It is designed to let you. The reel shaft and the mode setting related member are connected to a drive motor via a power transmission system and are operated by driving the drive motor.

[0004]

However, in the prior art, since the reel shaft and the mode setting-related member are connected to the drive motor via separate power transmission systems, the structure is complicated and the size is increased. However, there was a problem that the cost would be high. Therefore, an object of the present invention is to provide a tape running device in which the rotation of the reel shaft and the operation of the mode setting related member can be driven by a single drive system.

[0005]

In order to solve the above-mentioned problems, the present invention provides a first reel gear provided on one reel shaft and a second reel gear provided on the other reel shaft. , A first idler gear and a second idler gear that are constantly meshed with a main gear whose center of rotation is in a fixed position, and the first idler gear is the first reel gear or the second idler gear is the second idler gear. A rotation member that rotates in one direction or the other direction according to the rotation direction of the main gear so as to mesh with the two reel gears, and a second idler gear at a predetermined timing during the one-way rotation operation of the rotation member. And a gear for driving a mode setting-related member provided at a position meshing with.

[0006]

When the main gear is rotated, the rotating member is rotated in accordance with the rotation direction of the main gear, and the first idler gear meshes with the first reel gear. Further, the second idler gear meshes with a gear for driving the mode setting-related member at a predetermined timing during the rotation operation of the rotating member, and by the meshing of the first idler gear and the first reel gear, One of the reel shafts rotates and the second idler gear and the gear mesh with each other to operate the mode setting related member.

[0007]

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 is a plan view showing the main structure of a center capstan type tape recorder according to an embodiment of the present invention, and FIG. 2 is a state in a stop mode thereof.
FIG. 3 is a plan view showing a partially enlarged view of the state in the play mode.

This tape recorder uses a known tape cassette called a so-called micro-cassette, and when the end of the magnetic tape is detected by a known end detecting means during operation, the running direction of the magnetic tape is changed by an auto-reverse system. ..

A not-shown substantially rectangular outer housing of the tape recorder has a flat plate shape in which the base ends of a pair of reel shafts 34a and 34b on which a pair of reel hubs of a microcassette are mounted are rotatably supported. The support member 36 is horizontally stored, and the support member 36 is made of a non-magnetic material such as fiber reinforced synthetic resin or stainless steel.

The shape of the support member 36 is omitted in the drawing, and the members arranged on the lower surface side of the support member 36 are illustrated without the support member 36 for convenience sake.

The support member 36 includes a pair of reel shafts 34a, 34b approximately in the middle of the pair of reel shafts 34a, 34b.
Capstan 5 at a position separated from the line connecting b
The base end of 2 is rotatably supported. A flywheel 54 is concentrically fixed to the base end of the capstan 52 on the lower surface side of the support member 36.

On the lower surface side of the supporting member 36, 1
A bidirectional motor 58 is arranged at a corner near one reel shaft 34a on the side opposite to the capstan 52 with respect to the line connecting the pair of reel shafts 34a and 34b. The bidirectional motor 58 is attached to the support member 3 by a mounting member (not shown).
It is fixed to the lower surface of 6.

An output pulley 58a is fixed to the output shaft of the bidirectional motor 58, and the flywheel 54 is connected to the output pulley 58a via a power transmission belt 60.

Further, an output gear 1 as a main gear is concentrically fixed to a base end portion of the capstan 52, and a turning lever 2 as a turning member is rotatably supported. .. A first idler gear 3 is rotatably attached to one end of the lower surface of the rotating lever 2, and a second idler gear 4 is rotatably attached to the other end of the lower surface. The first and second idler gears 3 and 4 are in mesh with the output gear 1.

Further, first and second reel gears 5, 6 are concentrically fixed to the base ends of the pair of reel shafts 34a, 34b on the lower surface side of the support member 36. The rotation lever 2 is attached to the first and second reel gears 5 and 6.
The first and second idler gears 3 and 4 are moved by the rotation in the forward and reverse directions to selectively engage with each other.

Further, step gears 39a, 39b composed of a small-diameter gear portion and a large-diameter gear portion are rotatably arranged in the movement paths of the first and second idler gears 3, 4. Cam gears 25a and 25b as mode setting-related members are rotatably disposed near the step gears 39a and 39b. The cam gears 25a and 25b are adapted to mesh with the small-diameter gear portions of the step gears 39a and 39b. Not-shown toothless portions are formed on both sides of the cam gears 25a and 25b, and the toothless portion has a stepped gear 39 each time the cam gears 25a and 25b are rotated by 180 °.
The rotation is stopped so as to face the small-diameter gear parts a and 39b. Cams (not shown) are formed on the front and back surfaces of the cam gears 25a and 25b, respectively.

Further, on the front surface side of the cam gears 25a, 25b, there are drive levers 26a,
26b is opposed. These drive levers 26a, 2
6b is rotatably supported by support shafts 27a and 27b. Coil springs 28a and 28b are connected to the drive levers 26a and 26b, and the coil springs 28a and 28b urge the drive lever 26a to rotate clockwise and the drive lever 26b to rotate counterclockwise. .. Pins 49a and 49b are projectingly provided on the lower surfaces of the drive levers 26a and 26b.
9a and 49b are in contact with the cams on the front side of the cam gears 25a and 25b.

Protrusions 26c and 26d are formed on the outer upper side of the drive levers 26a and 26b in the drawing, and these protrusions 26c and 26d are provided in the first trigger lever 15 which will be described later in the fast-forward mode and the rewind mode. The stopper portion 15a and the stopper portion 1 of the second trigger lever 16
The drive levers 26a and 26b are respectively brought into contact with the drive levers 4a to regulate the rotation thereof.

Further, the rotating end edges of the interlocking levers 29a and 29b as mode setting related members are in contact with the lower ends of the drive levers 26a and 26b in the figure. These interlocking levers 29a and 29b are rotatably supported by support shafts 90a and 90b. These interlocking levers 2
Engagement holes 45a and 45b are bored on the rotating parts side of 9a and 29b, and guide pins 88a, which project from both ends of a magnetic head support plate, which will be described later, are formed in these engagement holes 45a and 45b.
88b is engaged.

On the other hand, on the lower surface side of the stepped gears 39a, 39b, a rotation lever 41 for delay as a mode setting related member is provided.
a and 41b are coaxially and rotatably provided. Pins 47a and 47b are provided on one end of the delay rotation levers 41a and 41b so as to project upward, and stoppers 42a and 42b are formed on the other end. The delay rotation levers 41a and 41b have coil springs 43a,
43b are connected, and the delay rotation lever 41a is urged to rotate counterclockwise and the delay rotation lever 41b to rotate clockwise. The pins 47a and 47b of the delaying rotation levers 41a and 41b are in contact with the cams on the back side of the cam gears 25a and 25b. Rotating lever 4 for delay
The stopper portions 42a and 42b of the blades 1a and 41b contact the rotating end portions of the rotating lever 2 including the above-mentioned first and second idler gears 3 and 4 to temporarily restrict the rotation thereof. The magnetic tape 32a is prevented from running before the recording / reproducing head contacts the magnetic tape.

The cam shapes of the cam gears 25a and 25b are such that when the cam gears 25a and 25b are rotated, first, the pins 49a and 49b of the drive levers 26a and 26b are operated, and then there is a slight time difference between them. Moving lever 41
It is formed to operate the pins 47a and 47b of a and 41b.

Rotating ends of the first and second trigger levers 15 and 16 as mode setting-related members face the lower surfaces of the cam gears 25a and 25b. The second trigger lever 16 is composed of first and second rotating levers 13 and 14, and the first and second rotating levers 13 and 14 are rotatably supported by the same support shaft 17b. There is. Pins 19a and 19b are respectively provided on the rotary end portions of the second rotary lever 14 constituting the first trigger lever 15 and the second trigger lever 116 so as to project upward, and these pins 19a and 19b are provided. Is in contact with the cams on the back side of the cam gears 25a and 25b.

A stopper portion 15a is provided on the outer side portion of the first trigger lever 15 in the figure, and a stopper portion is formed on the outer side portion of the second turning lever 14 constituting the second trigger lever 16 in the figure. The portion 14a is provided so as to project. When the self-holding solenoid 11 is energized a second time to release the holding of the first trigger lever 15 and the second trigger lever 16 in the fast-forward mode and the rewinding mode, the stopper portions 15a and 14a have the above-mentioned features. Protrusions 26c, 26 protruding from the drive levers 26a, 26b
The drive levers 26a and 26b are prevented from rotating by abutting with d.

The first trigger lever 15 and the second trigger lever 15
First turning lever 13 that constitutes the trigger lever 16 of
Are rotatably supported by support shafts 17a and 17b, respectively.
Are elastically coupled by. In addition, the wire spring 2 is provided between the first trigger lever 15 and the first turning lever 13.
2, the wire spring 22 is attached with the spring force charged to the first trigger lever 15 in order to bias the first rotating lever 13 in the clockwise direction. The operator 12 of the self-holding solenoid 11 is connected to one end of the second trigger lever 16. 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. Further, a main coil spring 18 is connected to one end side of the first rotating lever 13 which constitutes the second trigger lever 16, so that the first rotating lever 13 rotates counterclockwise. Is urged by.
Further, an auxiliary coil spring 19 is installed between the other ends of the first and second turning levers 13 and 14, and the first turning lever 13 and the second turning lever 14 are elastically coupled. There is. In addition, the first and second rotating levers 1
A wire spring 20 is interposed between the wires 3 and 14, and the wire spring 20
Is the first to urge the second turning lever 14 counterclockwise.
The rotary lever 13 is attached with the spring force charged.

The pair of delaying rotation levers 41 are also provided.
A cam switch 51 which is turned on and off by turning of the delay turning levers 41a and 41b is provided between a and 41b, and the turning position of the cam is detected by the switch 51.

The above-mentioned first and second trigger levers 1
Brakes 55a and 55b are provided on the reference numerals 5 and 16, and these brakes 55a and 55b are self-holding solenoids 11.
When the holding of the operator 12 is released and the first and second trigger levers 15 and 16 are rotated, the rotation is restricted by meshing with the first and second reel gears 5 and 6. It has become.

On the other hand, on the upper surface of the support member 36, there is arranged a magnetic head support plate extending along a pinch roller / magnetic head insertion window of a tape cassette (not shown).
A pair of recording / reproducing heads are mounted on both sides of the capstan 52 on the magnetic head supporting plate with the core gaps facing the pinch rollers / magnetic head insertion windows of the tape cassette.

A pair of guide holes 86a, 86b extending a predetermined distance in the direction orthogonal to the pinch roller / magnetic head insertion window are formed in the support member 36 at positions corresponding to both longitudinal ends of the magnetic head support plate. Are formed in the pair of guide holes 86a and 86b, and the pair of guide pins 88a and 86b are fixed so as to project downward from both ends of the magnetic head support plate.
88b is inserted.

On the lower surface side of the support member 36, between the downward protrusions of the pair of support shafts 90a, 90b and the pair of guide pins 88a, 88b at both ends of the magnetic head support plate,
A pair of toggle springs 92a using a torsion coil spring,
Both ends of 92b are hooked. Each of the pair of toggle springs 92a and 92b has a pair of guide pins 88a and 88 at both ends of the corresponding magnetic head support plate.
B is urged toward one end or the other end in the longitudinal direction with the intermediate position in the longitudinal direction as a boundary in the corresponding pair of guide holes 86a and 86b.

While the tape recorder is set to the stop mode, the magnetic head support plate moves one pair of guide pins 88a and 88b by the rotation of the pair of interlocking levers 29a and 29b. Pair of guide pins 88
a, 88b downward protrusions to a pair of toggle springs 92a, 9a
The pair of guide holes 86 of the support member 36 by the urging force of 2b.
It is located farthest from the pinch roller / magnetic head insertion window of the tape cassette in a and 86b (state shown in FIG. 2). In this state, the magnetic head support plate is arranged parallel to the pinch roller / magnetic head insertion window, and
The pair of recording / reproducing heads are separated from the magnetic head pinch roller / insertion window by a predetermined distance.

FIG. 3 shows one state while the play mode is set in the tape recorder, in which the magnetic head support plate is one guide pin 88a.
Is held at the end farther from the pinch roller / magnetic head insertion window in the corresponding guide hole 86a,
Further, the other guide pin 88b corresponds to the corresponding guide hole 86b.
Among them, it is moved to the end closer to the pinch roller / magnetic head insertion window. As a result, the magnetic head support plate is disposed so as to be inclined with respect to the pinch roller / magnetic head insertion window, and the recording / reproducing head near the other guide pin 88b is inserted into the pinch roller / magnetic head insertion window to allow the tape cassette It is in contact with the inside magnetic tape 32a. In the above state, the magnetic tape 32a is wound from one reel shaft 34b to the other reel shaft 34a.

It should be noted that while the stop mode is set in the tape recorder, the state shown in FIG.
The transition to the above-mentioned tilted state shown in FIG. 2 will be described in detail later.

On the upper surface side of the support member 36, the pinch roller / tape of the tape cassette is attached to one support shaft 90b.
A base end portion of a pinch roller lever (not shown) extending on the pair of recording / reproducing heads on the magnetic head supporting plate toward the other supporting shaft 90a along the magnetic head inserting window is rotatably supported. The pinch roller lever is located at the position corresponding to the capstan 52 in the middle of the pair of recording / reproducing heads.
5 is rotatably supported.

The tip of the pinch roller lever is bent toward the upper surface of the support member 36 immediately before the other support shaft 90a, that is, bent downward.
The other end of a torsion coil spring (not shown) which is wound around the other support shaft 90a and has one end engaged with the support member 36 is engaged with the bent front end.

The urging force of the torsion coil spring urges the pinch roller lever toward the pinch roller / magnetic head insertion window of the tape cassette, but the pinch roller lever 9 is pressed while the stop mode is set in the tape recorder.
Reference numeral 4 is a pinch roller 95 of the tape cassette that resists the biasing force of the torsion coil spring by bringing the engaging claw of the lower horizontal portion of the pinch roller support piece into contact with the edge of the engaging opening of the magnetic head support plate. / It is separated from the magnetic head insertion window by a predetermined distance.

The biasing force applied from the torsion coil spring to the pinch roller lever is opposite in direction to the biasing force applied to the magnetic head support plate from the pair of toggle springs 92a and 92b in the stop mode setting state described above. Moreover, it is slightly larger than the latter bias. However, while the tape recorder is set in the stop mode, the magnetic head support plate is moved by the pair of guide pins 88a, 88 by the interlocking levers 29a, 29b controlled by the cam gears 25a, 25b.
Since b is held, the magnetic head support plate approaches the pinch roller / magnetic head insertion window of the tape cassette together with the pinch roller lever 94 by the biasing force of the torsion coil spring of the pinch roller lever, and a pair of recordings together with the pinch roller 95. Either one of the re-heads is not inserted into the pinch roller / magnetic head insertion window and brought into contact with the magnetic tape 32a.

In the tape recorder according to the embodiment of the present invention configured as described above, when the play mode is set by operating the operation button (not shown) exposed on the outer surface of the exterior housing, the bidirectional motor is set. 58 rotates the output pulley 58a in one direction (clockwise direction), for example. As a result, the drive belt 60 travels and the capstan 52 and the flywheel 54 also rotate to one side,
The main gear 1 is rotated and the rotary lever 2 is rotated clockwise. The rotation of the main gear 1 causes the first and second idler gears 3 and 4 to rotate, and the rotation of the rotating lever 2 causes the second idler gear 4 to become a large-diameter tooth portion of the step gear 39b. The gears are engaged with each other, and the step gear 39b is rotated clockwise. When the rotating lever 2 is rotated by a predetermined angle, the rotating lever 2 comes into contact with the stopper portion 42b of the delay rotating lever 41b and stops at a position where the first idler gear 3 does not mesh with the first reel gear 5.

On the other hand, at this time, the self-holding solenoid 11 is energized and the holding of the operating element 12 is released. As a result, the first and second trigger levers 15, 16
Is in a free state, the second trigger lever 16 is rotated counterclockwise about the support shaft 17b by the urging force of the coil spring 18 or both 18, 19, and by this rotation, 1 trigger lever 15
Is rotated clockwise through the coil spring 21 and the wire spring 22. By the rotation of the first and second trigger levers 15 and 16, the pin 19 at the rotation end is formed.
a and 19b are respectively moved outward to move the cam gears 25a,
The cam gear 25a, 25b is rotated by a predetermined angle by the contact force of the cam on the back side of 25b. As a result, the toothless portions of the cam gears 25a and 25b are moved so that the tooth portions mesh with the stepped gears 39a and 39b, respectively. At this time, since only one of the step gears 39a and 39b is rotating, only the cam gear 25b is rotated.

By the rotation of the cam gear 25b, first,
The pin 49b of the drive lever 26b is moved by the cam on the front surface side of the cam gear 25b so that the drive lever 26b moves to the support shaft 27.
Rotate counterclockwise around b. By this rotation, the rotation restriction of the interlocking lever 29b is released, whereby the magnetic head support plate is moved together with the pinch roller lever by the urging force of the torsion coil spring to the other guide pin 8
Pinch roller of tape cassette with 8a as the center of rotation
Rotate toward the magnetic head insertion window.

When the pinch roller lever is rotated, the pinch roller 95 is inserted into the pinch roller / magnetic head insertion window and presses the magnetic tape 32a against the capstan 52 so that the magnetic tape 32a cooperates with the capstan 52. Stop by pinching.

As shown in FIG. 3, the above-mentioned rotation of the magnetic head supporting plate is caused in one of the guide holes 86b by the biasing force of the corresponding toggle spring 92b by the downward protrusion of one guide pin 88b of the magnetic head supporting plate. The recording / reproducing head near one of the guide pins 88b is inserted into the pinch roller / magnetic head insertion window at this point when the recording / reproducing head is stopped by coming into contact with the end on the side of the pinch roller / magnetic head insertion window. It is brought into contact with the magnetic tape 32a.

In this way, one head is the magnetic tape 3
After being contacted with 2a, the rotation of the cam gear 25b causes
This time, the pin 49b of the delay rotation lever 41b is connected to the cam gear 2
5b is moved by the cam on the rear surface side of the rear side 5b to rotate the delay rotation lever 41b in the counterclockwise direction.
Is separated from the rotating lever 2. As a result, the rotating lever 2 further rotates by a predetermined angle and comes into contact with the stopper 57 to stop the rotation, and the first idler gear 3 meshes with the first reel gear 5 so that the first reel gear 5 is engaged. 5 is rotated. By this rotation, the recording / reproducing head picks up a signal from the magnetic tape 32a pulled out from the reel hub (not shown) on the other reel shaft 34b at a predetermined speed, sends it to an electric circuit (not shown), and reproduces it from a speaker. The reel hub (not shown) on one reel shaft 34a is the capstan 5
2 and the magnetic tape 32a delivered from the pinch roller 95 at a predetermined speed is wound up.

When the magnetic tape 32a reaches the end of the reel hub (not shown) on the other reel shaft 34b, the known end detecting means provided in the exterior housing of the tape recorder operates to perform the stop operation. Then, the self-holding solenoid is energized, and the holding of the operating element 12 is released. As a result, the cam gear 25b is rotated, and the pin 49b is moved by the cam on the front surface side, and accordingly, the drive lever 26b and the interlocking lever 29b are also moved and the guide pin 49b is retracted. As a result, the magnetic head also separates from the tape and enters the stop mode. Then, after that, the motor 58 is reversed. When the motor 58 is reversed, the output pulley 58a is rotated to the other side, so that the drive belt 60 travels in the opposite direction to that in the above-described play, and the flywheel 54 is rotated in the opposite direction. Due to this rotation, the main gear 1 and the turning lever 2 are turned in the opposite directions, and the first and second
The idler gears 3 and 4 are also rotated in the reverse direction, and the first idler gear 3 is meshed with the step gear 39a by the reverse rotation of the rotating lever 2 so that the step gear 39a.
Is rotated.

When the rotating lever 2 is rotated by a predetermined angle, it abuts on the stopper portion 42a of the delay rotating lever 41a and stops at a position where the second idler gear 4 does not mesh with the second reel gear 6. ing.

The rotation of the stepped gear 39a causes the cam gear 2 to rotate.
5a is rotated and the drive lever 26a is rotated clockwise, and the interlocking lever 29a is rotated counterclockwise, so that the other guide pin 88a of the magnetic head support plate farther from the other reel shaft 34b. Release the downward protrusion. By this release, the magnetic head support plate rotates together with the pinch roller lever 94 toward the pinch roller / magnetic head insertion window of the tape cassette with one guide pin 88b as the rotation center by the biasing force of the torsion coil spring.

When the pinch roller lever is rotated, the pinch roller 95 is inserted into the pinch roller / magnetic head insertion window and presses the magnetic tape 32a against the capstan 52 so that the magnetic tape 32a cooperates with the capstan 52. Stop by pinching.

The above-mentioned rotation of the magnetic head support plate corresponds to the guide hole 8 by the urging force of the toggle spring 92a corresponding to the downward protrusion of the other guide pin 88a of the magnetic head support plate.
When the recording / reproducing head near the other guide pin 88a is stopped by contacting the end of the pinch roller / magnetic head insertion window in 6a, the recording / reproducing head near the other guide pin 88a is stopped. And is brought into contact with the magnetic tape 32a.

As described above, the recording / reproducing head uses the magnetic tape 32.
After the contact with a, the cam gear 25a is rotated, and this time the pin 49a of the delay rotation lever 41a is moved to the cam gear 25a.
The cam is provided on the back side of a to move the delay rotation lever 4
1a is rotated clockwise, and its stopper portion 42a is separated from the rotation lever 2. As a result, the rotation lever 2 further rotates by a predetermined angle and comes into contact with the stopper 57 to stop the rotation, and the second idler gear 4 meshes with the second reel gear 6 so that the second reel gear 6 is engaged. 6 is rotated. By this rotation, the magnetic tape 3 pulled out at a predetermined speed from a reel hub (not shown) on the reel shaft 34a.
The recording / reproducing head picks up a signal from 2a, sends it to an electric circuit (not shown), and reproduces it from a speaker. A reel hub (not shown) on the other reel shaft 34b winds up the magnetic tape 32a sent out from the capstan 52 and the pinch roller 95 at a predetermined speed. Next, a case of setting the fast-forward mode will be described.

In this case, the fast-forward mode setting button (not shown) is continuously pressed twice. The operation in the fast-forward mode is the same as the operation in the play mode described above until part way. That is, if you set the fast-forward mode,
The bidirectional motor 58 rotates the output pulley 58a in one direction. As a result, the drive belt 60 travels and the capstan 52 and the flywheel 54 also rotate to one side,
The main gear 1 is rotated and the rotary lever 2 is rotated clockwise. The rotation of the main gear 1 rotates the first and second idlers 3 and 4, and the rotation of the rotation lever 2 causes the second idler gear 4 to mesh with the large-diameter tooth portion of the step gear 39b. Then, the step gear 39b is rotated. When the rotating lever 2 is rotated by a predetermined angle, the rotating lever 2 comes into contact with the stopper portion 42b of the delay rotating lever 41b and stops at a position where the first idler gear 3 does not mesh with the first reel gear 5.

On the other hand, at this time, the self-holding solenoid 11 is energized for the first time, and the holding of the operating element 12 is released. As a result, the first and second trigger levers 15 and 16 are brought into a free state, and the second trigger lever 16 is counterclockwise about the support shaft 17b by the coil spring 18 or the urging forces of both 18 and 19. The first trigger lever 15 is rotated by the coil spring 21 and the wire spring 22.
It is rotated clockwise through. The rotation of the first and second trigger levers 15 and 16 causes the pins 19a and 19b at the rotation ends thereof to move outwardly to come into contact with the cams on the back side of the cam gears 25a and 25b, respectively. The cam gears 25a and 25b are rotated by a predetermined angle by the contact force.
As a result, the toothless portions of the cam gears 25a and 25b are moved so that the tooth portions mesh with the stepped gears 39a and 39b, respectively. At this time, the step gears 39a and 39b are the one step gear 3
Since only 9b rotates, only the cam gear 25b rotates.

By the rotation of the cam gear 25b, first,
The pin 47b of the drive lever 26b is moved by the cam on the front surface side of the cam gear 25b so that the drive lever 26b moves to the support shaft 27.
Attempts to rotate counterclockwise around b. However, at this time, the self-holding solenoid 11 is energized for the second time to release the holding of the second trigger lever 16, and the pin 19b is moved inward by the rotation of the cam gear 25b, so that the operator 12 is self-holding. The second trigger lever 16 attracted to the die solenoid again rotates counterclockwise. Therefore, when the drive lever 26b attempts to rotate in the counterclockwise direction, the projection 26d of the drive lever 26b contacts the stopper portion 14a formed on the second rotation lever 14 which constitutes the second trigger lever 16. The contact is stopped and the rotation is restricted. Therefore, the rotation of the interlocking lever 29b also remains restricted, the magnetic head support plate does not operate together with the pinch roller lever, and the recording / reproducing head is positioned away from the magnetic tape.

In this way, when the cam gear 25b is further rotated while the recording / reproducing head remains separated from the magnetic tape, the pin 47b of the delay rotation lever 41b is moved by the cam on the back side of the cam gear 25b. Thus, the delay rotation lever 41b is rotated counterclockwise, and the stopper portion 42b thereof is separated from the rotation lever 2. As a result, the rotating lever 2 further rotates clockwise by a predetermined angle and comes into contact with the stopper 57 to stop the rotation, and the first idler gear 3 meshes with the first reel gear 5 to move the first idler gear 3 to the first reel gear 5.
The reel gear 5 is rotated, and the magnetic tape 32a is wound at high speed.

The rewind mode is the same as that of the mode setting-related member except that the rotation direction of the bidirectional motor 58 is opposite to that in the fast-forward mode and the other cam gear 25a is rotated. ..

As described above, the reel gear 5 is simply rotated by rotating the rotating lever 2 by the rotation of the bidirectional motor 58.
The power can be transmitted to (or 6), and the power can be transmitted to the step gears 39a and 39b for operating the mode setting related members. Therefore, it becomes possible to run the magnetic tape 32a and set the mode with a single power transmission system, which simplifies the structure and reduces the cost.

[0056]

As described above, according to the present invention,
By rotating the rotating member in one direction, the first idler gear meshes with the first reel gear, and the second idler gear meshes with the gear for operating the mode setting related member. The transmission system enables the running of the magnetic tape and the setting of modes, which is advantageous in that the structure can be simplified and downsized, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a tape recorder including a tape running device that is an embodiment of the present invention.

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

FIG. 3 is a partially enlarged plan view showing a state of the tape recorder of FIG. 1 in a play mode.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Output gear (main gear), 2 ... Rotating lever (rotating member), 3 ... 1st idler gear, 4 ... 2nd idler gear, 5 ... 1st reel gear, 6 ... 2nd reel Gears, 25a, 25b ... Cam gears (mode setting related members), 26a, 26b ... Drive levers (mode setting related members), 34a ... One reel shaft, 34b ... Other reel shafts, 39a, 39b ... Gears, 41a, 41b ... Delayed rotation lever (member related to mode setting).

Claims (1)

[Claims] 1. A first reel gear provided on one reel shaft, a second reel gear provided on the other reel shaft, and a first gear which is always meshed with a main gear whose rotation center is in a fixed position. Having one idler gear and a second idler gear,
A rotating member for rotating the first idler gear in one direction or the other according to the rotation direction of the main gear so as to mesh the first reel gear or the second idler gear with the second reel gear; The second moving member is moved at a predetermined timing during the one-directional turning operation of the moving member.
And a gear for driving a mode setting-related member provided at a position that meshes with the idler gear.