JPH08287551A - Reel turntable changeover mechanism of tape recorder - Google Patents

Abstract

PURPOSE: To hold a driving gear stage for driving reel turntables of a reel turntable changeover mechanism of a tape recorder with a head substrate after operating the gear stage to a connecting position by means of a cam gear in both of a thrust direction and a radial direction. CONSTITUTION: A take-up gear 9 for driving the reel turntables is operated in the cam parts in the thrust direction and radial direction of the cam gear 7 for mode changeover of the tape recorder. The connecting and holding of the gear are transferred to holding parts 24g, 24h of the head substrate 24 after the operation to a prescribed gear connecting position and the holding is released by the cam gear 7, by which the action of the load generated from the take-up gear 9 on the cam gear 7 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel stand switching mechanism of a tape recorder for selecting the number of rotations of a reel stand on which a tape is wound, in a reproduction state and a fast-forward state, and for selecting a driving direction between a forward direction and a reverse direction. Is.

[0002]

2. Description of the Related Art In recent years, as audio equipment has become smaller and lighter and its operability has been improved, further cost reduction has been demanded by reducing the number of parts and assembling man-hours. However, cost reduction while maintaining reliability is an issue.

A conventional reel recorder switching mechanism of a tape recorder has two gears for reproducing, fast feeding and rewinding on the reel holder in order to switch the number of rotations of the reel holder in the reproducing state, fast-forwarding and rewinding state. The gears on the drive side that can be connected to these gears are selected in the thrust direction by moving the drive-side gears in the thrust direction to switch between the playback state, fast-forward, and rewind state. As a means for moving the drive gear in the thrust direction, in the conventional method, the gear on the drive side is controlled by the thrust cam portion formed in the cam gear having the tooth portion that can selectively mesh with the gear portion formed in the flywheel by solenoid control. Uses a structure that regulates the position and holds and connects the gears in the regenerative state, fast-forwarding or rewinding state by the cam part, or the movement operation of the head substrate , By operating the drive side of the gear by the head substrate, the playback state or fast-forward by controlling the position, configuration for connection holding the gear stages in the rewinding state were common. In addition, in order to switch the gear stage between the forward rotation direction and the reverse rotation direction of the reel stand, the gear on the drive side is rotated in the radial direction to select the connection of the gear speeds and realize the switching between the normal rotation state and the reverse rotation state. However, as a means for rotating the drive side gear in the radial direction, in the conventional method, the position of the drive side gear is regulated by the radial cam part formed on the cam gear, and the cam part is in the normal rotation state or the reverse direction. When the gears on the drive side are operated by the head substrate and the position is regulated by utilizing the configuration that holds and holds the gear stages in the state, the gear stages are linked in the replay state, fast-forward, and rewind state. The structure of holding is common.

[0004]

However, in the reel base switching mechanism of the conventional tape recorder as described above, the drive gear connected to the reel base is operated in the thrust direction and the radial direction by the cam gear made of the resin material. In the cam gear system that holds the gear stage connected to the reel stand, the cam gear shifts the position of the holding part, accumulates rattling of parts, and escapes or deforms the holding part due to reaction force during engagement.
The gears mesh with each other due to wear, and the gears are disengaged from each other, causing the gears to be disengaged from the reel base, resulting in tape damage and tape winding.In addition, the cam gear may not rotate properly due to increased load on the cam gear. However, there are many problems related to quality and reliability, such as a mistake in switching the operation of the mechanism and the inability to cancel each operating state. Further, in the head substrate system in which the drive gear connected to the reel base is operated in the thrust direction and the radial direction on the head substrate to hold the gear stage in connection with the reel base, in the engagement portion at the time of operating the drive gear. The gears mesh with each other due to wear, and the gears are disengaged from the reel base, causing tape damage and tape winding.The drive gear is operated in meshing positions in the thrust and radial directions. However, due to the structure of the mechanism, it is necessary to take a large movement stroke of the head substrate.Therefore, the power consumption for driving the head substrate increases, the power consumption increases, the operating time increases, the quality deteriorates, and the mounting mechanism increases. There was a problem that the available product categories were limited. In order to solve these problems described above, it is necessary to add mechanical parts, introduce high-precision and high-rigidity parts, materials, and the like, which inevitably results in higher costs.

In view of the above conventional problems, the present invention has been made for the purpose of realizing a reel base switching mechanism of a tape recorder with high quality, high reliability and low cost.

[0006]

In order to solve the above problems, a reel base switching mechanism of a tape recorder according to the present invention has a capstan motor, and the power of the capstan motor is transmitted via a capstan belt. A flywheel having a capstan shaft for running a cassette tape on a rotating shaft at a constant speed, a cam gear having a toothless portion capable of selectively meshing with a gear portion formed on the flywheel, a solenoid, and one end of the solenoid A first actuating lever that is connected to a solenoid and has the other end engaged with a locking portion of the cam gear and controlling engagement with the gear portion of the flywheel at the toothless portion; and a first cam portion of the cam gear. And a magnetic head on which a magnetic head is mounted and which can reciprocate between a mechanism stop position and a reproduction position, and a cassette half hub, and a tape. A forward rotation / reversal reel base for winding, a winding gear capable of selectively meshing with a first gear portion of the normal rotation / reversal reel base, a rotation gear for rotatably supporting the winding gear, and a cam gear An actuating arm slidable in the thrust direction by a second cam portion, a spring for biasing the actuating arm in the thrust direction, and a rotatable rotatable coaxially with the take-up gear via the take-up gear and a friction mechanism. Held by the second of the forward and reverse reel stand
A pulley portion having a gear portion capable of selectively meshing with the gear portion and a pulley portion to which the power of the flywheel is transmitted via a winding belt, and one end of which engages with a third cam portion of the cam gear, The other end is connected to the actuating arm, and the actuating arm is connected to the first and second gear parts of the forward / reverse reel stand, the winding gear, and the pulley gear according to the shape of the third cam part. A second actuating lever is provided for rotating in a radial direction between the meshing position with the gear portion, and in the reproducing state, the first cam portion of the cam gear holds the head substrate at the reproducing position, and the winding gear. And the operation arm is held against the biasing force of the spring so that the first gear portion of the normal rotation / reversal reel stand is brought into a meshing position with the first gear portion in the thrust direction. And a third cam portion of the cam gear holds the operating arm via the second operating lever so that the first gear portion of either the forward rotation or the reverse rotation is in a meshing position in the radial direction. Thus, the power of the capstan motor is transmitted to the forward rotation / reversal reel base, and when the mechanism shifts from the stopped state to the reproduction state, the second arm portion of the cam gear causes the actuating arm to operate. When it slides in the thrust direction against the biasing force of the spring and moves to the meshing position between the winding gear and the first gear portion of the forward rotation / reversal reel base, it moves to the reproduction position. The head substrate comes into contact with the operating arm, the second cam portion of the cam gear is disengaged from the operating arm in the reproduction state, and the head substrate causes the operating arm to move. It is characterized in that it has configured to hold the meshing position.

Further, in the reel base switching mechanism of the tape recorder of the present invention, the first cam portion of the cam gear holds the head substrate at the fast-forward position in the fast-forwarding and rewinding states, and the gear portion of the pulley gear and the gear portion. The actuating arm is held by the biasing force of the spring so that the second gear portion of the forward rotation / reversal reel stand is in the meshing position in the thrust direction, and the gear portion of the pulley gear and the normal rotation / reversal reel. The second gear portion of the base is set so as to be in the meshing position in the radial direction.
By holding the operating arm by the third cam portion of the cam gear via the operating lever of No. 3, the power of the capstan motor is transmitted to the forward rotation / reversal reel stand, and the mechanism is stopped. Alternatively, at the time of shifting from the reproduction state to the fast-forwarding and rewinding state, the operation arm is rotated in the radial direction by the third cam portion of the cam gear, and the gear portion of the pulley gear and the second rotation of the forward rotation / reversal reel stand are provided. When the head substrate that is moving to the fast-forward position engages with the operating arm when it moves to the meshing position with the gear portion, and in the fast-forwarding and rewinding states, the third cam portion and the second cam portion of the cam gear are used. The operating arm is disengaged via the operating lever and the head substrate holds the operating arm in a meshed position. It is intended.

[0008]

With the reel base switching mechanism of the tape recorder according to the present invention, the cam gear to which the power of the capstan motor is selectively transmitted via the capstan belt and the flywheel is connected to the reel base switching mechanism by the above-mentioned structure. Let
Each operating state of the mechanism is realized by controlling with a solenoid, and in the regenerating state, the first gear of the forward or reverse reel stand and the winding gear on the drive side are in the meshing position in the thrust direction. The operating arm supporting the take-up gear is held by the head substrate, and the engagement position in the radial direction is held by the third cam portion formed on the cam gear, which holds the operating arm via the second operating lever. I am doing that. The holding action of the operating arm in the thrust direction by the head substrate in the regenerating state is such that when the mechanism shifts from the stopped state to the regenerating state, the second arm formed in the cam gear moves the operating arm in the thrust direction and winds it. First gear with forward or reverse reel gear
When the position reaches the meshing position in the thrust direction with the gear, the first cam portion formed on the cam gear causes the head substrate moving in the reproduction position direction to come into contact with the operating arm to mesh the operating arm. After being held in the position, the engagement between the actuating arm and the second cam portion of the cam gear is released.

Further, in the reel stand switching mechanism of the present invention, in the fast forward and rewind states, the gear portion of the pulley gear rotatably held coaxially with the second gear of the forward or reverse reel stand and the take-up gear. Hold the operating arm with the head substrate so that the position becomes the meshing position in the radial direction.
Holding of the meshing position in the thrust direction is performed by pressing the actuating arm against the thrust direction holding portion by a spring that biases the actuating arm. The radial holding operation of the operating arm by the head substrate in the fast-forwarding state allows the operating arm to rotate in the radial direction by the third cam formed on the cam gear when the mechanism is in the stopped state or the playback state is changed to the fast-forwarding state. When the gear portion of the pulley gear reaches the meshing position in the radial direction with the second gear of the forward or reverse reel stand, the first cam portion formed on the cam gear moves the fast forward and rewind positions. This is performed by bringing the inner head substrate into contact with the operating arm, and after holding the operating arm in the meshed position, the engagement between the operating arm and the third cam portion of the cam gear is released.

The reel stand switching mechanism of the tape recorder of the present invention is a mechanism constructed as described above, and the mechanism is used after the winding gear and the pulley gear connected to the reel stand are operated by the cam gear in the thrust direction and the radial direction. In each mode state, since it is held by the head substrate made of a metal material that is easy to perform high-precision processing and has high rigidity against resin, the gear stage is connected and held with the reel stand, resulting from each moving part. The load acts on the cam gear, and the rotation and self-propelled operation of the cam gear does not become defective due to the increase in the load on the cam gear, stable operation switching of the mechanism and cancellation of each operating state can be realized. Position of the holding part due to the cam gear made of resin material, accumulation of rattling of parts, escape of the holding part due to reaction force at the time of meshing, deformation, wear, operation with the head substrate. The effect of countermeasures against problems such as meshing pitch shifts of gears caused by wear of mating members at the engagement part when releasing, disconnection of gears from the reel base and tape damage and tape winding occur Yes, and basically, the head substrate only holds the connected state of each gear and does not perform the operation of shifting each gear to the meshed state, so there is no need to increase the movement stroke of the head substrate. It is possible to realize a power saving, high operability, compact and lightweight mechanism, and it is not necessary to add mechanical parts, high precision parts, materials, etc., and it is possible to achieve high quality, high reliability, and low cost for tape recorders. A reel base switching mechanism can be realized.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view showing each rotary system component configuration of a reel base switching mechanism of a tape recorder in one embodiment of the present invention, and FIGS. 2 to 9 are partial side views showing each rotary system component configuration.

1 to 9, reference numeral 1 is a chassis, 2 is a motor, the motor 2 is fixed on a mechanical chassis 1, and a motor pulley 3 is press-fitted and held on its rotary shaft. Reference numeral 4 is a forward rotation flywheel, and 5 is a reverse flywheel.
a, the reverse capstan 5a is press-fitted and held, and the forward rotation flywheel 4 has a gear portion 4b. Reference numeral 6 denotes a capstan belt. The capstan belt 6 connects the motor pulley 3, the forward rotation flywheel 4, and the reverse flywheel 5 so that the counterclockwise rotational force of the motor 2 is applied to the forward rotation flywheel 4 and the reverse flywheel. 5 respectively.

A cam gear 7 is rotatably held around a support shaft 1a on the mechanical chassis 1 and has a gear portion 7a and toothless portions 7b, 7c and 7d on its outer periphery. As shown in FIG. 2, the gear portion 7a is in a positional relationship capable of meshing with the gear portion 4b of the forward rotation flywheel 4, and in the meshing state, the forward rotation flywheel 4 is in a meshed state.
Although the counterclockwise rotational force is transmitted in the clockwise direction, the toothless portions 7b, 7c, 7d cannot mesh with each other when the toothless portions 7b, 7c, 7d are in a position facing the gear portion 4b of the forward flywheel 4. The rotational force of the forward rotation flywheel 4 is not transmitted.

Reference numeral 8 is a main pulley, 9 is a winding gear,
As shown in FIG. 3, the main pulley 8 is the shaft portion 9 of the winding gear 9.
It is rotatable about a as a spindle and is connected to the winding gear 9 via a friction mechanism. That is, the friction spring 10 whose one end is fixed to the winding gear 9 is
On the other hand, the friction plate 11 is slidable in the thrust direction and fixed in the radial direction by the key groove 9b.
And the frictional force with the felt 12 transmits the rotational force between the main pulley 8 and the winding gear 9. Further, the main pulley 8 has a V groove portion 8a and a gear portion 8b, and the winding gear 9 has a gear portion 9c.

Reference numeral 13 is a winding arm, 14 is a winding belt, and the winding arm 13 is rotatable about a support shaft 1b on the mechanical chassis 1 and is in a thrust direction (arrow AB direction) as shown in FIG. Is held slidably on the rotary shafts 9d and 9e of the winding gear 9 and is rotatably held on the bearings 13a and 13b. The winding belt 14 includes a V groove portion 4c of the forward flywheel 4 and a V groove portion 8a of the main pulley 8.
To transmit the counterclockwise rotational force of the forward rotation flywheel 4 to the main pulley 8.

Reference numeral 15 is a take-up relay gear, 16 is a fast-forward relay gear, 17 is a forward rotation reel stand, 18 is a reverse reel stand,
The take-up relay gear 15 is rotatably held around a support shaft 1c on the mechanical chassis 1, and the fast-forward relay gear 16 is rotatably held about a support shaft 1d on the mechanical chassis 1. Both the forward rotation reel stand 17 and the reverse reel stand 18 are rotatable around respective rotation support shafts 19 press-fitted and held on the mechanical chassis 1, and a washer 20 prevents them from coming off in the thrust direction.
Further, the forward rotation reel base 17 and the reverse reel base 18 respectively include winding gear portions 17a and 18a and fast-forward gear portions 17b and 18 respectively.
b, it has reel claws 17c, 18c for engaging the hub of the cassette half and winding the tape. As shown in FIG. 5, the normal rotation reel stand 17 is arranged such that the winding gear portion 17a always meshes with the winding relay gear 15 and the fast-forward gear portion 17b meshes with the fast-forwarding relay gear 16.

6 to 9 are partial side views showing the connected state of each gear portion, and FIGS. 6 to 7 are the gear portion 8b of the main pulley 8, the gear portion 9c of the winding gear 9, and the winding relay gear. 15 shows the connected state of the fast-forward relay gear 16. Here, the winding arm 13 moves in the direction of the arrow A, and the gear portion 8b of the main pulley 8 and the fast-forwarding relay gear 16 are in a position where they can mesh with each other in the thrust direction.
Fig. 6 shows a state in which the gears cannot engage with each other in the thrust direction.
Then, the winding arm 13 moves in the direction of the arrow B, and the gear portion 8b of the main pulley 8 and the fast-forward gear 16 cannot mesh with each other in the thrust direction. FIG. 7 shows a state in which meshing is possible in the thrust direction.

8 to 9 show the connected state of the gear portion 8b of the main pulley 8, the gear portion 9c of the take-up gear 9, the take-up gear portion 18a of the reversing reel stand 18, and the fast-forward gear portion 18b. Here, the winding arm 13 moves in the direction of arrow A, and the gear portion 8b of the main pulley 8 and the fast-forward gear portion 18b of the reversing reel base 18 are in a position where they can mesh with each other in the thrust direction and the gear portion 9c of the winding gear 9. FIG. 8 shows a state in which the take-up gear portion 18a of the reversing reel base 18 is in a position where the take-up gear portion 18a cannot mesh with each other in the thrust direction. FIG. 9 shows a state in which the fast-forward gear part 18b of FIG. 3 is in a position where it cannot mesh in the thrust direction, and the gear part 9c of the winding gear 9 and the winding gear part 18a of the reversing reel stand 18 are in a position where they can mesh in the thrust direction.

FIG. 10 to FIG. 11 are plan views showing each drive system component configuration of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention, and FIG. 12 is a partial side view showing each drive system component configuration, Each figure shows the stopped state of the mechanism.

In FIG. 10 to FIG. 12, reference numeral 21 is a solenoid, which is fixed on the mechanical chassis 1 and has a movable iron core 21a which performs a suction operation when energized. Reference numeral 22 denotes a trigger lever, and the trigger lever 22 is rotatably held around a support shaft 1e on the mechanical chassis 1, and a movable iron core 21a of the solenoid 21.
And a connecting portion 22a of the cam gear 7 and the engaging portions 7e and 7f of the cam gear 7,
7g, the cam gear 7 is locked, and the gear portion 4b of the forward rotation flywheel 4 and the toothless portions 7b, 7c, 7 of the cam gear 7 are engaged.
It has the locking shaft 22b which regulates to the position where d opposes. Reference numeral 23 denotes a spring, and the spring 23 is held on the mechanical chassis 1, one end is fixed to the holding portion 1f, and the other end is held by the holding portion 22c of the trigger lever 22 so that the trigger lever 22 is constantly watched. By rotating and urging the trigger lever 22 in the direction, the contact portion 22d of the trigger lever 22 is brought into contact with the stopper portion 1g on the mechanical chassis 1 to regulate the position in the clockwise direction.

Reference numeral 24 denotes a head substrate. The head substrate 24 has slide guide portions 24a, 24b, 24c held by the projections 1h, 1i, 1j on the mechanical chassis 1 so that the head substrate 24 can be reciprocally slid in the direction of arrow CD. There is an engaging shaft 24d that can be engaged with the cam portion 7h of the cam gear 7, and an engaging portion 24e that can be engaged with the engaging shaft 13c of the winding arm 13.
Reference numeral 25 denotes a spring. The spring 25 is held on the mechanical chassis 1, one end thereof is fixed to the holding portion 1k, and the other end thereof is held by the hook portion 24f of the head substrate 24, so that the head substrate 24 is always indicated by an arrow. Sliding bias in the D direction,
The slide guide portions 24a, 24b, 24c are brought into contact with the protrusions 1h, 1i, 1j on the mechanical chassis 1 to regulate the position in the arrow D direction. Reference numeral 26 denotes a head block, which is fixed on the head substrate 24 and holds the magnetic head 26a.

Reference numeral 27 is a take-up lever, and the take-up lever 27 is rotatable around the support shaft 1b on the mechanical chassis 1 as a bearing, and is hooked on the mechanical chassis 1 and the support shaft 1l.
By engaging with the claw portion 27a of the take-up lever 27 that penetrates b, it is prevented from coming off in the thrust direction. Further, the take-up lever 27 is connected to the radial cam portion 7 of the cam gear 7.
i, 7j, 7k, 7l, 7m, 7n, 7o, 7p, 7
An engaging shaft 27b engageable with q, 7r, 7s, 7t, a connecting portion 27c connecting with the winding arm 13 only in the radial direction, and an engaging portion engageable with the engaging portion 22e of the trigger lever 22. 27d. 28 is a spring, and one end of this spring 28 is the winding arm 13,
The other end is held by the winding lever 27, and the winding arm 1
3 is constantly urged in the direction of arrow A, and the rotation boss end surface 13e of the winding arm 13 is brought into contact with the seat surface 1m of the support shaft 1b on the mechanical chassis 1 to regulate the position in the direction of arrow A. ing.

Further, the cam gear 7 has a thrust cam portion 7u which can be engaged with the engaging portion 13d of the winding arm 13 and slides the winding arm 13 in the direction of arrow B against the urging force of the spring 28. Has been formed. In addition, the winding arm 1
The winding lever 27, which is connected to the winding arm 3 and the winding arm 13 in the radial direction by the connecting portion 27c, is always urged to rotate clockwise by the tension of the winding belt 14 via the main pulley 8. , The engaging shaft 2 of the winding lever 27
7b is brought into contact with the radial cam portion 7i of the cam gear 7 to regulate the position in the clockwise direction.

The operation of the reel base switching mechanism of the tape recorder according to the embodiment of the present invention constructed as above will be described below. In the mechanism stop position state of FIGS. 10 to 12, when the motor 2 is energized, a rotational force is generated in the counterclockwise direction, and the normal rotation flywheel 4 is rotated in the counterclockwise direction due to each rotary system component configuration shown in FIG. At this time, the cam gear 7 has the trigger lever 22 at the engaging portion 7e.
Of the forward rotation flywheel 4 is not transmitted to the cam gear 7 because the toothless portion 7b of the forward rotation flywheel 4 is engaged with the locking shaft 22b of FIG. . Further, the gear portion 8b of the main pulley 8, the fast-forwarding relay gear 16, and the fast-forwarding gear portion 18b of the reversing reel base 18 are in the meshable position in the thrust direction shown in FIGS. 6 and 8, but in the non-meshable position in the radial direction. The gear portion 9c of the take-up gear 9, the take-up relay gear 15, and the take-up gear portion 18a of the reversing reel stand 18 are in positions where they cannot mesh in the thrust direction and the radial direction. The force is not transmitted to the forward rotation reel stand 17 and the reverse reel stand 18.

When the solenoid 21 is energized from this state, the movable iron core 21a of the solenoid 21 starts the suction operation in the direction of arrow C as shown in FIGS.
The trigger lever 22 connected to a is rotated counterclockwise against the biasing force of the spring 23. Solenoid 21
The engagement between the engagement portion 7e of the cam gear 7 and the engagement shaft 22b of the trigger lever 22 is released in the state where the suction is completed. Therefore, the urging means (not shown) such as a spring rotates and urges the clockwise rotation. The cam gear 7 is rotated clockwise,
The gear portion 7a of the cam gear 7 meshes with the gear portion 4b of the forward rotation flywheel 4, the counterclockwise rotational force of the forward rotation flywheel 4 is transmitted, and the cam gear 7 starts rotating in the clockwise direction.

FIGS. 15 to 16 show a state in which the cam gear 7 rotates clockwise by a certain angle. As shown in FIG. 15, when the solenoid 21 is in the released state, the take-up arm 13 and the take-up lever 27 connected to the take-up arm 13 in the radial direction by the connecting portion 27c are the take-up lever 27.
Since the position regulation by the radial cam portion 7i of the cam gear 7 of the engaging shaft 27b of FIG.
The tension of 4 rotates clockwise through the main pulley 8 and the engagement shaft 27b of the take-up lever 27 comes into contact with the radial cam portion 7j of the cam gear 7 to regulate the position. Even in this state, the gear portion 8b of the main pulley 8 and the fast-forwarding relay gear 16 are in the meshable position in the thrust direction shown in FIG. 6, but are in the meshing position in the radial direction and the gear portion 9c of the winding gear 9 are wound. The relay gear 15 is in a position where it cannot mesh in both the thrust direction and the radial direction.

Further, as shown in FIG. 16, the solenoid 21
Is in the suction state, the winding arm 13 and the winding lever 27 connected to the winding arm 13 in the radial direction by the connecting portion 27c are the engaging shaft 2 of the winding lever 27.
Since the position regulation by the radial cam portion 7i of the cam gear 7b of 7b is released, the tension of the take-up belt 14 receives the turning force in the clockwise direction via the main pulley 8, but the locking portion of the trigger lever 22 is received. Since 22e is engaged with the locking portion 27d of the take-up lever 27, the clockwise turning operation is blocked. Even in this state, the gear portion 8b of the main pulley 8 and the fast-forward gear portion 1 of the reversing reel base 18
8b is in a meshable position in the thrust direction shown in FIG. 8, but in a meshable position in the radial direction, the gear portion 9c of the winding gear 9 and the winding gear portion 18a of the reversing reel base 18 are in the thrust direction and the radial direction. Both are in a position where they cannot mesh with each other.

When the cam gear 7 further rotates clockwise from this state, the engaging shaft 24d of the head substrate 24 starts to engage with the radial cam portion 7h of the cam gear 7 as shown in FIG. Along the 7h, it starts sliding in the direction of arrow C against the urging force of the spring 25.

FIG. 18 shows a diagram corresponding to FIG. 15 and FIG. 19 shows a diagram corresponding to FIG. 16 in this state. In FIG. 18, the engagement shaft 27b of the take-up lever 27 is the cam gear 7
The position regulation by the radial cam portion 7j is continued, and the positional relationship of each gear is maintained as shown in FIG. Further, in FIG. 19, since the position of the winding lever 27 is regulated by the suction of the solenoid 21 as described above, the engagement shaft 27b of the winding lever 27 contacts the radial cam portion 7k of the cam gear 7, and the solenoid 21 After the suction is released, the position is regulated by the radial cam portion 7k, but the positional relationship of each gear is still in the state shown in FIG. Further, from the state shown in FIGS. 18 to 19, the engaging portion 13d of the take-up arm 13 abuts on the inclined portion 7v of the thrust cam portion 7u of the cam gear 7, and the take-up arm 13 moves in the thrust direction with the take-up lever 27. Are not connected, they start sliding in the direction of arrow B against the biasing force of the spring 28 shown in FIG. Also, FIG.
During the transition from FIGS. 5 to 16 to FIGS. 18 to 19, the magnetic head 26a and the tape running means (not shown) are switched in the forward and reverse directions (the switching means is not shown). The shift of No. 1 corresponds to the normal rotation direction, and the shift from FIG. 16 to FIG. 19 corresponds to the reverse rotation direction.

When the cam gear 7 further rotates in the clockwise direction, the take-up arm 13 causes the thrust cam portion 7u of the cam gear 7 to move.
20 slides in the direction of arrow B against the urging force of the spring 28, and the engaging portion 13d of the take-up arm 13 is engaged with the thrust cam portion 7u of the cam gear 7 as shown in FIGS. It is held by the holding unit 7w. 20 shows a state after shifting from FIG. 18, FIG. 21 shows a state after shifting from FIG. 19, and FIG. 22 shows a partial side view. The position of the winding arm 13 in the thrust direction at this time is, as shown in FIGS. 7 and 9, the gear portion 8b of the main pulley 8, the fast-forward relay gear 16, and the fast-forward gear portion 18b of the reversing reel stand 18.
Is in the non-meshable position in the thrust direction, and the gear portion 9c of the take-up gear 9, the take-up relay gear 15 and the take-up gear portion 18a of the reversing reel stand 18 are in the meshable position in the thrust direction. However, as shown in FIG. 20, the engagement shaft 27b of the take-up lever 27 is attached to the radial cam portion 7j of the cam gear 7, and the take-up lever 2 is provided as shown in FIG.
Since the engagement shaft 27b of No. 7 is positionally regulated by the radial cam portion 7k of the cam gear 7, each gear stage is in a position where meshing is impossible in the radial direction. When the cam gear 7 further rotates in the clockwise direction from this state, the head substrate 24 is moved by the radial cam portion 7h of the cam gear 7 in the arrow C direction.
23, the engaging portion 24e of the head substrate 24 comes into contact with the engaging shaft 13c of the winding arm 13 to regulate the position in the thrust direction as shown in the partial side view of FIG. I am configuring.

When the cam gear 7 further rotates clockwise from the state shown in FIG. 20, the engagement shaft 27b of the take-up lever 27 comes into contact with the radial cam portion 71 of the cam gear 7,
Since it follows the radial cam portion 71, the take-up lever 27 rotates clockwise. When the winding lever 27 rotates clockwise, the winding arm 13 connected in the radial direction by the connecting portion 27c of the winding lever 27 also rotates clockwise,
The engaging shaft 27b of the take-up lever 27 is held by the inclined portion of the radial cam portion 7l, the gear portion 9c of the take-up gear 9 and the take-up relay gear 15 are in mesh with each other, and the normal rotation reproduction state of the mechanism shown in FIG. Becomes Forward reel stand 17 at this time
The rotational force of the forward flywheel 4 in the counterclockwise direction is transmitted to the main pulley 8 via the take-up belt 14.
3 is transmitted as a rotational force in the counterclockwise direction to the take-up gear 9 by the frictional force determined by the friction coefficient between the felt 12, the main pulley 8 and the friction plate 11 and the load of the friction spring 10, as shown in FIG. A predetermined rotation torque is generated at the rotation torque, and the rotation torque drives the forward rotation reel base 17 through the winding relay gear 15 in the counterclockwise direction.

When the cam gear 7 further rotates in the clockwise direction from the state shown in FIG. 21, the engaging shaft 27b of the take-up lever 27 comes into contact with the radial cam portion 7m of the cam gear 7 and extends along the radial cam portion 7m. The lever 27 rotates counterclockwise. When the take-up lever 27 rotates in the counterclockwise direction, the take-up arm 13 connected in the radial direction by the connecting portion 27c of the take-up lever 27 also rotates in the counterclockwise direction, and the engaging shaft of the take-up lever 27. 27b is a radial cam portion 7
The gear portion 9c of the take-up gear 9 and the take-up gear 18a of the reversing reel stand 18 are held by the inclined portion of m, and the reversal reproduction state of the mechanism shown in FIG. 25 is achieved. At this time, the rotational force is transmitted to the reversing reel base 18 in the same manner as in the normal rotation reproduction state, because the rotational force in the counterclockwise direction of the normal rotation flywheel 4 is transmitted to the main pulley 8 in the counterclockwise direction via the winding belt 14. Is transmitted as the rotational force of the felt 12, the main pulley 8 and the friction plate 1 as shown in FIG.
A predetermined rotation torque is generated in the winding gear 9 by the frictional force determined by the friction coefficient between the two and the load of the friction spring 10, and the rotation torque drives the reversing reel stand 18 in the clockwise direction.

FIGS. 26 to 28 show the positional relationship among the drive system components in the normal rotation and reverse reproduction states. FIG. 26 is a normal rotation reproduction state, FIG. 27 is a reverse reproduction state, and FIG. 28 is a partial side view in the reproduction state. 26 to 28, the forward flywheel 4 is rotating counterclockwise, but the cam gear 7 has the trigger lever 22 at the locking portion 7f.
Since the toothless portion 7c of the forward rotation flywheel 4 is engaged with the locking shaft 22b of the normal rotation flywheel 4 and is restricted to the position facing the gear portion 4b of the forward rotation flywheel 4, the rotational force of the forward rotation flywheel 4 is not transmitted to the cam gear 7. . Further, the engagement shaft 24d of the head substrate 24 is held by the radial cam portion 7h of the cam gear 7, and the inclination angle of the holding portion is pressed by the spring 25 in the direction of arrow D. Therefore, the cam gear 7 is urged to rotate clockwise. Has been done. This rotational biasing force is applied to the gear portion 4b of the forward rotation flywheel 4 and the gear portion 7a of the cam gear 7 immediately before the reproduction state.
The gear portion 7a and the toothless portion 7c in the engaged state and the toothless portion 7c face each other and are also used as the rotational self-propelling force of the cam gear 7 when shifting to the non-engaged state.

The winding arm 13 has its engaging portion 13d.
And the thrust cam portion 7u of the cam gear 7 are disengaged, and the thrust cam portion 7u faces the relief portion 7x. Therefore, the winding arm 13 is held in the thrust direction in the forward rotation direction shown in FIGS. The normal rotation holding unit 24g of the head substrate 24 in the reproduction state, and the reverse rotation holding unit 24h in the reverse reproduction state shown in FIGS. 25 and 27. That is, the biasing force of the spring 28 that presses the winding arm 13 in the direction of arrow A is not received by the thrust cam portion 7u of the cam gear 7, but by the head substrate 24.

Next, when the solenoid 21 is energized in this state, as shown in FIG. 29, the movable iron core 2 of the solenoid 21 is moved.
1a starts the suction operation in the direction of arrow C, and the movable iron core 21a
The trigger lever 22 connected with is counterclockwise rotated against the biasing force of the spring 23. Since the engagement portion 7f of the cam gear 7 and the engagement shaft 22b of the trigger lever 22 are disengaged in the state where the solenoid 21 has completed the suction, the engagement shaft 24d of the head substrate 24 tilts the radial cam portion 7h of the cam gear 7. The cam gear 7 which is urged to rotate in the clockwise direction by pressing the corner rotates in the clockwise direction, and the gear portion 7a of the cam gear 7 is rotated by the gear portion 4 of the forward flywheel 4.
The cam gear 7 meshes with b, the counterclockwise rotational force of the forward rotation flywheel 4 is transmitted, and the cam gear 7 starts rotating in the clockwise direction.

As shown in FIGS. 30 to 32, when the cam gear 7 rotates clockwise from the state shown in FIG. 29, the engagement shaft 27b of the take-up lever 27 moves from the state of FIG. The winding belt 1 comes into contact with the radial cam portion 7n.
Since the winding lever 27 rotates in the counterclockwise direction because it follows the radial cam portion 7n against the tension of No. 4, the engagement shaft 27b is held by the radial cam portion 7o. 25, the take-up lever 27 rotates clockwise due to the tension of the take-up belt 14, and the engagement shaft 27b moves from the cam gear 7 to the reverse reproduction state of FIG.
Since it comes into contact with the radial cam portion 7n and follows the radial cam portion 7n, the winding lever 27 rotates counterclockwise,
The engagement shaft 27b is held by the radial cam portion 7o. The position of the take-up arm 13 in the radial direction when the engagement shaft 27b of the take-up lever 27 is held by the radial cam portion 7o of the cam gear 7 is in a state where meshing of the gear stages is impossible. Further, the engaging portion 13d of the winding arm 13 is again engaged with the holding portion 7y by the relief portion 7x of the thrust cam portion 7u of the cam gear 7, and the spring 28 is held after the winding arm 13 is held in the thrust direction. The winding arm 13 moves along the inclined portion 7z due to the urging force in the direction of arrow A.
When the rotary boss end surface 13e of the winding arm 13 comes into contact with the seat surface 1m of the support shaft 1b on the mechanical chassis 1, the position is regulated in the arrow A direction. The position of the winding arm 13 in the thrust direction at this time is as follows: the gear portion 8b of the main pulley 8, the fast-forwarding relay gear 16, and the fast-forward gear portion 18b of the reversing reel stand 18 shown in FIGS.
At a position where they can mesh with each other in the thrust direction, the gear portion 9c of the winding gear 9, the winding relay gear 15, and the reverse reel stand 18
The take-up gear portion 18a is in a state where it cannot mesh with each other in the thrust direction. On the other hand, since the engagement shaft 24d of the head substrate 24 is along the radial cam portion 7h of the cam gear 7, the head substrate 24 slides in the direction of arrow D by the urging force of the spring 25, and the engagement shaft 27b of the take-up lever 27 causes the engagement shaft 27b of the cam gear 7 to move. When the winding arm 13 is held by the portion 7o, the engagement shaft 13c of the winding arm 13 is engaged with the forward rotation holding portion 24g, the reverse holding portion 24h, and the engaging portion 24e of the head substrate 24. It is configured to be released.
That is, when the winding arm 13 slides in the arrow A direction by the engaging portion 13d of the winding arm 13 following the inclined portion 7z of the thrust cam portion 7u of the cam gear 7, the engagement of the winding arm 13 is increased. The holding range of the holding portion 7y of the thrust cam portion 7u, the inclination angle of the inclined portion 7z, so that the combined shaft 13c does not contact the head substrate 24 and hinder the sliding operation.
It is regulated by the shape.

33 to 34 show a state in which the cam gear 7 is rotated clockwise by a certain angle from this state. As shown in FIG. 33, when the solenoid 21 is in the released state in this state, the winding arm 13 and the winding lever 27 which is connected to the winding arm 13 in the radial direction by the connecting portion 27c are wound up. Since the position regulation by the radial cam portion 7o of the cam gear 7 of the engagement shaft 27b of the lever 27 is released, the tension of the take-up belt 14 causes the take-up lever 27 to rotate in the clockwise direction via the main pulley 8. The engagement shaft 27b of the above contacts the radial cam portion 7p of the cam gear 7, and the position is regulated. Even in this state, the gear portion 8b of the main pulley 8 and the fast-forwarding relay gear 16 are in a meshable position in the thrust direction shown in FIG. 6, but in a position in which they cannot mesh in the radial direction, the gear portion 9c of the winding gear 9 and the winding portion 9c are wound. The relay gear 15 is in a position where it cannot mesh in both the thrust direction and the radial direction. Further, as shown in FIG. 34, when the solenoid 21 is in the suction state in this state, the winding arm 13 and the winding lever 27 connected to the winding arm 13 in the radial direction by the connecting portion 27c are Since the position regulation by the radial cam portion 7o of the cam gear 7 of the engagement shaft 27b of the take-up lever 27 is released, the tension of the take-up belt 14 receives the turning force in the clockwise direction via the main pulley 8. Since the engaging portion 22e of the trigger lever 22 is engaged with the locking portion 27d of the take-up lever 27, the clockwise turning operation is blocked. Even in this state, the gear portion 8b of the main pulley 8 and the fast-forward gear portion 18b of the reversing reel base 18 are in the meshable position in the thrust direction shown in FIG. 8, but are not meshed in the radial direction. The gear portion 9c and the winding gear portion 18a of the reversing reel stand 18
Is in a position where meshing is impossible in both the thrust and radial directions.

FIG. 35 shows a diagram corresponding to FIG. 33 when the cam gear 7 further rotates clockwise from this state.
A view corresponding to No. 4 is shown in FIG. In FIG. 35, the position of the engagement shaft 27b of the take-up lever 27 is continuously regulated by the radial cam portion 7p of the cam gear 7, and the positional relationship of each gear is maintained as shown in FIG. Also,
In FIG. 36, since the position of the winding lever 27 is regulated by the suction of the solenoid 21 as described above, the engagement shaft 27b of the winding lever 27 comes into contact with the radial cam portion 7q of the cam gear 7 to suck the solenoid 21. After the release, the take-up lever 27 and the take-up arm 13 rotate counterclockwise because they are held by the radial cam portion 7q and follow the radial cam portion 7q, and the positional relationship of each gear is from the state shown in FIG. 34 to the radial direction. Gear part 8 of main pulley 8
The shift to the state where the meshing of b with the rapid feed gear portion 18b of the reversing reel stand 18 is started.

On the other hand, the head substrate 24 is the head substrate shaft 2
Since 4d is along the radial cam portion 7h of the cam gear 7, it is slid in the direction of arrow C by the urging force of the spring 25, as shown in FIG.
7, the engagement shaft 27b of the take-up lever 27 is held by the radial cam portion 7p of the cam gear 7 at the position of the take-up arm 13 in a state corresponding to FIG. 13c and the engaging portion 24 of the head substrate 24
The right end surface 24i of e is configured to start the engagement. Further, as shown in FIG. 38, at the position of the winding arm 13 in a state corresponding to FIG. 36, in which the engagement shaft 27b of the winding lever 27 is held by the radial cam portion 7q of the cam gear 7, the winding arm 13 is moved. Engaging shaft 13c and head substrate 2
The left end surface 24j of the fourth engaging portion 24e is configured to start the engagement.

When the cam gear 7 further rotates in the clockwise direction from the state shown in FIG. 35, the engaging shaft 27b of the take-up lever 27.
The position regulation by the radial cam portion 7p of the cam gear 7 is released, and the winding arm 13 and the winding lever 27 are rotated clockwise by the tension of the winding belt 14, so that the positional relationship of each gear is shown in FIG. From the state shown, the gear portion 8b of the main pulley 8 and the fast-forwarding relay gear 16 mesh with each other in the radial direction, and the mechanism shown in FIG. 39 enters the fast-forwarding state. In this case, the counterclockwise rotation force of the forward rotation flywheel 4 is transmitted to the main pulley 8 via the winding belt 14 as the counterclockwise rotation force. The forward rotation reel base 17 is driven counterclockwise by the connection of the gear portion 8b of the main pulley 8 and the fast-forward relay gear 15.

Further, when the cam gear 7 further rotates in the clockwise direction from the state shown in FIG. 36, the positional relationship between the gear stages is that of the gear portion 8b of the main pulley 8 and the fast-forward gear portion 18b of the reversing reel stand 18 shown in FIG. The meshing state continues,
The mechanism shown in FIG. 40 is in the rewinding state. At this time, the rotational force is transmitted to the reversing reel base 18 in the same manner as in the fast-forwarding state, because the counterclockwise rotational force of the forward flywheel 4 rotates counterclockwise to the main pulley 8 via the winding belt 14. Transmitted as force, and the gear portion 8b of the main pulley 8
The reverse reel base 18 is driven in the clockwise direction by the connection of the rapid feed gear 18b of the reverse reel base 18.

The positional relationships of the drive system components in the fast-forward and rewind reproduction states are shown in FIGS. Figure 41
Is a fast-forward state, FIG. 42 is a rewinding state, and FIG. 43 is a partial side view in a fast-forwarding and rewinding state. 41-
In FIG. 43, the forward rotation flywheel 4 is rotating in the counterclockwise direction, but the cam gear 7 engages with the engagement shaft 22b of the trigger lever 22 at the engagement portion 7g thereof, and the toothless portion 7d thereof rotates in the forward rotation direction. Since the flywheel 4 is restricted to a position facing the gear portion 4b, the rotational force of the forward flywheel 4 is not transmitted to the cam gear 7. Also, the head substrate 2
The engaging shaft 24d of No. 4 is held by the radial cam portion 7h of the cam gear 7, and the inclination angle of the holding portion is adjusted by the spring 2
The cam gear 7 is urged to rotate in the clockwise direction because it is pressed in the direction of arrow D by 5. This rotational biasing force is fast forward,
Immediately before the rewinding state, the gear portion 4b of the forward rotation flywheel 4 and the gear portion 7a of the cam gear 7 are fast-forwarded from the meshed state, and the gear portion 7a and the toothless portion 7d are in the rewinding state.
Of the cam gear 7 when they shift to the non-meshing state
It is also used as a turning power.

In the fast-forward state shown in FIGS. 39 and 41, the take-up arm 13 rotates clockwise due to the tension of the take-up belt 14, and the gear portion 8b of the main pulley 8 and the fast-forward relay gear 16 are rotated. Although the position is regulated at the meshing position, the winding lever 2 connected to the winding arm 13 in this state.
In the rewinding state shown in FIGS. 40 and 42, the engagement shaft 13c of the take-up arm 13 is moved to the head substrate 24 so that the engagement shaft 27b of No. 7 does not come into contact with the radial cam portion 7r of the cam gear 7. The engaging shaft 24b is held by the left end face 24j of the engaging portion 24e, and the engaging shaft 27b of the take-up lever 27 is positioned so as not to contact the radial cam portion 7q of the cam gear 7. That is, the meshing reaction force of each gear in the fast-forwarding and rewinding states is transmitted through the winding arm 13 and the winding lever 27 to the radial cam portions 7r and 7 of the cam gear 7.
If it is in the fast-forwarding state instead of being received by q, it is determined from the rotation support shaft position of the winding arm 13, the meshing position of the gear portion 8b of the main pulley 8 and the fast-forwarding relay gear 16, and the tension direction of the winding belt 14. This is dealt with by utilizing the self-feeding action of the gear, and in the case of the rewinding state, the take-up arm 13 is held by the left end face 24j of the engaging portion 24e of the head substrate 24 to be received by the head substrate 24. It is configured.

Next, when the solenoid 21 is energized from this state, the movable iron core 2 of the solenoid 21 is moved as shown in FIG.
1a starts the suction operation in the direction of arrow C, and the movable iron core 21a
The trigger lever 22 connected with is counterclockwise rotated against the biasing force of the spring 23. Since the engagement portion 7g of the cam gear 7 and the engagement shaft 22b of the trigger lever 22 are disengaged in the state where the solenoid 21 has completed the suction, the engagement shaft 24d of the head substrate 24 tilts the radial cam portion 7h of the cam gear 7. The cam gear 7 which is urged to rotate in the clockwise direction by pressing the corner rotates in the clockwise direction, and the gear portion 7a of the cam gear 7 is rotated by the gear portion 4 of the forward flywheel 4.
The cam gear 7 meshes with b, the counterclockwise rotational force of the forward rotation flywheel 4 is transmitted, and the cam gear 7 starts rotating in the clockwise direction.

When the cam gear 7 rotates clockwise from the state shown in FIG. 44, the engagement shaft 27b of the take-up lever 27 contacts the radial cam portion 7r of the cam gear 7 from the fast-forward state shown in FIG. 39, as shown in FIG. Since it comes into contact with the tension of the take-up belt 14 and follows the radial cam portion 7r, the take-up lever 27
After rotating in the counterclockwise direction, the position of the engagement shaft 27b is regulated by the radial cam portion 7s. Further, from the rewinding state of FIG. 40, as shown in FIG. 46, the take-up lever 27 rotates clockwise due to the tension of the take-up belt 14, and the engagement shaft 27
b comes into contact with the radial cam portion 7t of the cam gear 7 and the position is regulated by the radial cam portion 7t. The engagement shaft 27b of the take-up lever 27 is connected to the radial cam portions 7r and 7t of the cam gear 7.
The position of the take-up arm 13 in the radial direction when the position is regulated by is in a state where meshing of the gear stages is impossible. Further, as shown in FIG. 47, the head substrate 24 slides in the arrow D direction by the biasing force of the spring 25 because the engaging shaft 24d is along the radial cam portion 7h of the gum gear 7. When the cam gear 7 further rotates in the clockwise direction from the state shown in FIGS. 45 to 47, the engagement shaft 27b of the take-up lever 27.
The position of is controlled by the radial cam portions 7r and 7 of the cam gear 7.
From t to the radial cam portion 7i, the mechanism shown in FIGS. 10 to 12 is stopped.

As described above, in the present embodiment, when the mechanism is changed to the reproduction state, the thrust cam portion 7u of the cam gear 7 moves the take-up arm 13 to a position where the gear stage of the reproduction system can be connected in the thrust direction. After that, the holding of the winding arm 13 is transferred to the head substrate 24, and the engagement of the cam gear 7 and the winding arm 13 is released in the reproducing state. 7 does not act on the head substrate 24. Therefore, when shifting from the reproduction state to the other mode, the cam gear 7 is moved from the position where the gear portion 4b of the forward rotation flywheel 4 and the toothless portion 7c of the cam gear 7 face each other.
Of the cam gear 7 in the clockwise direction by the engagement shaft 24d of the head substrate 24 pressing the inclination angle of the radial cam portion 7h of the cam gear 7 in the direction of arrow D. Without disturbing running
It is possible to realize stable mechanism operation switching and cancellation of each operation state.

Further, in this embodiment, when the mechanism rewinds, the radial cam portion 7 of the cam gear 7 is moved.
After the winding arm 13 is moved via the winding lever 27 to a position where the gear stage of the rewinding system can be coupled in the radial direction at q, the holding of the winding arm 13 is transferred to the head substrate 24 and rewinding. In this state, the engagement between the cam gear 7 and the take-up lever 27 is released, so that a reaction force of the gear connecting portion, which is much larger than that during the rewinding operation and the reproducing operation at the tape end, acts on the take-up arm 13. Instead, it is configured to act on the head substrate 24.
Therefore, due to the reaction force of the connecting portion, the position of the holding portion of the cam gear 7 shifts, the rattling of parts accumulates, the holding portion of the winding arm 13 or the winding lever 27 escapes, deforms, wears, etc. It is possible to realize a high-quality and high-reliability mechanism without causing a gear jump due to the release of the tape and causing a tape damage or a tape winding.

In this embodiment, the reaction force of the connecting portion between the gear portion 8b of the main pulley 8 and the fast-forwarding relay gear 16 in the fast-forwarding state is used to decouple the gear stages, that is, to skip the gears, by utilizing the gear self-feeding action. Although it is prevented, by holding the engagement shaft 13c of the winding arm 13 by the head substrate 24 as in the case of the rewinding state, it is possible to prevent the gear stage from being disconnected, that is, the gear jump.

[0049]

The reel stand switching mechanism of the tape recorder according to the present invention is a mechanism constructed as described above, and after the winding gear and the pulley gear connected to the reel stand are operated by the cam gear in the thrust direction and the radial direction. , In each mode state of the mechanism, it is easy to perform high-precision machining, and the head substrate, which is made of a metal material that has high rigidity with respect to resin, is used to hold the gear stages connected to the reel stand. Is applied to the cam gear, the stable operation switching of the mechanism and the release of each operating state can be realized without causing the rotation failure of the cam gear due to the increase of the load on the cam gear. As shown in the figure, the position of the holding part is displaced by the cam gear made of resin material, the rattling of the parts is accumulated, the holding part escapes due to the reaction force at the time of engagement, deformation, wear, and operation with the head substrate. The mating pitch of gears shifts due to wear of the mating member at the engaging part when the gear is engaged, and the gear is disengaged from the reel base, resulting in tape damage and tape entrainment. Yes, and basically, the head substrate only holds the connected state of each gear and does not perform the operation of shifting each gear to the meshed state, so there is no need to increase the movement stroke of the head substrate. It is possible to realize a power saving, high operability, compact and lightweight mechanism, and it is not necessary to add mechanical parts, high precision parts, materials, etc., and it is possible to achieve high quality, high reliability, and low cost for tape recorders. It is possible to realize a reel base switching mechanism.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of each rotary system component of a reel stand switching mechanism of a tape recorder according to an embodiment of the present invention.

FIG. 2 is a partial side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 3 is a partial side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder according to the embodiment of the present invention.

FIG. 4 is a partial side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 5 is a component side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 6 is a partial side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder according to the embodiment of the present invention.

FIG. 7 is a partial side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 8 is a partial side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder according to the embodiment of the present invention.

FIG. 9 is a partial side view showing the configuration of each rotary system component of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 10 is a plan view showing the configuration of each drive system component in a stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 11 is a plan view showing the configuration of each drive system component in a stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 12 is a component side view showing the configuration of each drive system component in a stopped state of the mechanism of the reel stand switching mechanism of the tape recorder according to the embodiment of the present invention.

FIG. 13 is a plan view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 14 is a plan view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 15 is a plan view showing the configuration of each component during the transition operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 16 is a plan view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 17 is a plan view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 18 is a plan view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 19 is a plan view showing the configuration of each part during the transition operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 20 is a plan view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 21 is a plan view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 22 is a partial side view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 23 is a partial side view showing the configuration of each component during the shifting operation from the stopped state of the mechanism of the reel base switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 24 is a plan view showing the configuration of each part in the normal reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 25 is a plan view showing the configuration of each part in the reverse reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 26 is a plan view showing the configuration of each component in the normal rotation reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 27 is a plan view showing the configuration of each component in the reverse reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 28 is a partial side view showing the configuration of each part in the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 29 is a plan view showing the configuration of each component during the transition operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

[Fig. 30] Fig. 30 is a plan view showing the configuration of each component during the transition operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 31 is a plan view showing the configuration of each part during the transition operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 32 is a side view showing the configuration of each component during the shifting operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 33 is a plan view showing the configuration of each part during the transition operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 34 is a plan view showing the configuration of each component during the transition operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 35 is a plan view showing the configuration of each part during the transition operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in the embodiment of the present invention.

FIG. 36 is a plan view showing the configuration of each component during the shifting operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

[Fig. 37] Fig. 37 is a plan view showing the configuration of each component during the shifting operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 38 is a plan view showing the configuration of each component during the transition operation from the reproduction state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 39 is a plan view showing the configuration of each component in the fast-forwarding state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 40 is a plan view showing the configuration of each part in the rewinding state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 41 is a plan view showing the configuration of each part in the fast-forwarding state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 42 is a plan view showing the configuration of each part in the rewinding state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 43 is a plan view showing the configuration of each component in the fast-forwarding and rewinding state of the mechanism of the reel base switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 44 is a plan view showing the configuration of each component during the transition operation from the fast-forward and rewind states of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 45 is a plan view showing the configuration of each component during the transition operation from the fast-forward state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

[Fig. 46] Fig. 46 is a plan view showing the configuration of each component during the shifting operation from the rewinding state of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention.

FIG. 47 is a plan view showing the configuration of each part of the mechanism of the reel stand switching mechanism of the tape recorder in one embodiment of the present invention during the shifting operation from the fast-forward and rewind states.

[Explanation of symbols]

 1 Mechanical chassis 1a to 1b Spindle 1f Holding part 1g Stopper part 1h to 1j Projection part 1k Holding part 1l Hook part 1m Seat surface 2 Motor (capstan motor) 3 Motor pulley 4 Forward rotation flywheel 4a Forward rotation capstan 4b Gear part 4c V-groove 5 Reversed flywheel 5a Reversed capstan 6 Capstan belt 7 Cam gear 7a Gear 7b-7d Missing teeth 7e-7g Locking 7h Radial cam (first cam) 7i-7t Radial cam (second) 7u Thrust cam portion (third cam portion) 7v Inclination portion 7w Holding portion 7x Relief portion 7y Holding portion 7z Inclination portion 8 Main pulley (pulley gear) 8a V Groove portion (pulley portion) 8b Gear portion 9 Winding gear 9a Shaft part 9b Key groove 9c Gear part 9d-9c Rotating shaft part 10 Friction spring 11 Reaction plate 12 Felt 13 Winding arm (operating arm) 13a to 13b Bearing portion 13c Engaging shaft 13d Engaging portion 13e Rotating boss end face 14 Winding belt 15 Winding relay gear 16 Fast-forwarding relay gear 17 Forward rotation reel stand 17a Winding Take-up gear 17b Fast-forward gear 17c Reel claw 18 Reversing reel stand 18a Take-up gear 18b Fast-forward gear 18c Reel claw 19 Rotating spindle 20 Washer 21 Solenoid 21a Movable iron core 22 Trigger lever (first operating lever) 22a Connecting part 22b Locking shaft 22c Holding part 22d Abutting part 22e Locking part 23 Spring 24 Head substrate 24a-24c Slide guide part 24d Engaging shaft 24e Engaging part 24f Hook part 24g Forward rotation holding part 24h Inversion holding part 24i Right end face 24j Left end face 25 Ring 26 head block 26a the magnetic head 27 winding lever (second operation lever) 27a claw portion 27b engaging shaft 27c connecting portion 27d engaging portion 28 spring

Claims (2)

[Claims] 1. A flywheel having a capstan motor, a flywheel having a power of the capstan motor transmitted through a capstan belt, and a rotation shaft of the capstan shaft for running a cassette tape at a constant speed, and the flywheel. A cam gear having a toothless portion capable of selectively meshing with a gear portion formed on the, a solenoid, and one end connected to the solenoid, the other end engaging with a locking portion of the cam gear, A first actuating lever for controlling meshing with a gear part of the flywheel, a first cam part and an engaging part of the cam gear, and a magnetic head are mounted to allow reciprocating motion between a mechanism stop position and a reproduction position. Head substrate,
Forward rotation to engage the cassette half hub and wind the tape,
A reversing reel base, a winding gear capable of selectively meshing with the first gear portion of the forward rotation / reversing reel base, and a second gear of the cam gear that rotatably supports the winding gear.
Of the operation arm slidable in the thrust direction by the cam portion, a spring biasing the operation arm in the thrust direction, and rotatably held coaxially with the winding gear via the winding gear and a friction mechanism. And the forward rotation,
A pulley gear having a gear portion capable of selectively meshing with the second gear portion of the reversing reel stand and a pulley portion to which the power of the flywheel is transmitted via a take-up belt, and one end of which is the third cam of the cam gear. And the other end is connected to the actuating arm, and the actuating arm is coupled to the first and second gear parts of the reversing reel stand and the winding part according to the shape of the third cam part. A second actuating lever for rotating the take-up gear and the gear portion of the pulley gear between the meshing positions in the radial direction, the first cam portion of the cam gear holding the head substrate in the reproducing position in the reproducing state. Then, the operating arm is held against the urging force of the spring so that the winding gear and the first gear portion of the forward rotation / reversal reel base are brought into meshing position in the thrust direction. Then, the operation arm is moved to the third position of the cam gear via the second operation lever so that the take-up gear and the first gear portion of either the forward rotation or the reverse rotation of the reel stand are in mesh with each other in the radial direction. The power of the capstan motor is transmitted to the forward rotation / reversal reel base by being held by the cam portion of the second cam portion of the cam gear when the mechanism shifts from the stopped state to the regenerated state. When the operating arm slides in the thrust direction against the biasing force of the spring, and moves to the meshing position between the winding gear and the first gear portion of the forward rotation / reversal reel base, The head substrate moving to the reproducing position contacts the operating arm, and in the reproducing state, the second cam portion of the cam gear is disengaged from the operating arm. Reel base switching mechanism of a tape recorder which is characterized by being configured to hold at a position meshing more the actuating arm. 2. In the fast-forwarding and rewinding state, the head substrate is held in the fast-forwarding position by the first cam portion of the cam gear, and the gear portion of the pulley gear and the second of the forward and reverse reel bases.
The operation arm is held by the urging force of the spring so that the gear part of the reel gear is in the meshing position in the thrust direction, and the gear part of the pulley gear and the second gear part of the forward or reverse reel stand in the radial direction. By holding the operating arm by the third cam portion of the cam gear via the second operating lever so as to be in the meshing position, the power of the capstan motor is transmitted to the forward rotation / reversal reel base. However, when the mechanism moves from the stopped state or the replay state to the fast-forward and rewind states, the third cam portion of the cam gear causes the actuating arm to rotate in the radial direction, and the gear portion of the pulley gear and the normal rotation and the reverse rotation. When the head substrate is moving to the fast-forwarding position when the reel base moves to the meshing position with the second gear portion, the operation is performed. Over arm engages, fast forward, engagement of the actuating arm in the rewind state through the third cam portion and the second actuating lever of the cam gear is canceled,
2. A reel base switching mechanism for a tape recorder according to claim 1, wherein the operating arm is held by the head substrate at a meshing position.