JPS642283Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a tape recorder drive that selectively drives the take-up reel stand and the supply reel stand to switch between tape fast forward (FF) and rewind (REW) operations. Regarding the mechanism.

In a general tape recorder, the drive mechanism for fast forwarding (FF) and rewinding (REW) the tape consists of a rotating body (gear) on the take-up side that rotates together with the reel stand on the take-up side, and a reel stand on the supply side. A supply-side rotary body (gear) that rotates together with the supply side rotary body is provided, and a drive rotary body (gear) that is located between the two rotary bodies and is driven by a motor is provided. Then, the driving rotary body is selectively engaged (meshed) with the winding side rotary body and the supply side rotary body,
The take-up reel stand or the supply reel stand is rotated at high speed.

Conventionally, as a means for selectively engaging the driving rotary body, an FF operation lever or a REW control lever has been used.
A mechanism is adopted in which the drive rotor is moved using the operating push force of the operating lever. However, in this mechanism, since the driving rotating body is moved by the moving force of the operating lever, there is a drawback that the operating resistance force of the operating lever is large and the operation becomes heavy. In addition, in order to enable the so-called feather touch operation,
There is a mechanism in which an electric switch is used as an operation button, and when the switch is operated, a solenoid is attracted, thereby moving the driving rotary body toward the winding-side rotary body or the supply-side rotary body. However, in this mechanism,
During the FF operation and the REW operation, the solenoid must be continuously attracted to keep the drive rotor engaged with the take-up side or supply side rotary body, which increases the power consumption of the solenoid and is uneconomical.

The present invention aims to solve the above-mentioned conventional drawbacks, and aims to provide a drive mechanism for a tape recorder that can perform a selection operation of the drive rotating body by simply sucking the solenoid for a certain period of time during the initial operation. The purpose is

The present invention uses the rotation of the cam to move the switching lever, and engages with a guide groove that branches into two paths between the auxiliary lever and the switching lever for moving the drive rotor. with protrusions interposed,
Only a solenoid is used to select between the protrusion and the guide groove.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a drive mechanism of a tape recorder according to the present invention.

Reference numeral 1 in the figure is the base. A take-up reel stand 2 and a supply reel stand 3 are rotatably provided on the base 1. A reel 2a and a rotating body (gear) 2b are provided below the take-up reel stand 2 so as to rotate together. reel 2
A is for receiving power when rotating the take-up reel stand 2 at a constant speed during recording and playback. A winding side rotating body (gear) 4 is located near the winding side reel stand 2.
is provided. This winding-side rotating body 4 is engaged with the rotating body 2b, and the winding-side rotating body 4 rotates together with the winding-side reel stand 2.
However, the rotation directions of both are opposite. Also,
A supply side rotating body (gear) 3a is provided below the supply side reel stand 3 so as to rotate together with the supply side rotary body (gear) 3a. A driving rotating body (gear) is placed between both rotating bodies 3a and 4.
5 is provided. The drive rotary body 5 is rotatably supported at the tip of a swing lever 6, and the base of the swing lever 6 is swingably supported on the base 1 by a fulcrum 7. There is. An auxiliary lever 8 is provided at the tip of the swing lever 6.
A protrusion 8a is provided at its tip. Also,
A pulley 9 is provided below the drive rotary body 5 so as to rotate together with the pulley 9, and a belt 10 is hung between the pulley 9 and a drive pulley 9a connected to a motor (not shown). . The pulley 9 and the drive rotor 5 are always driven to rotate counterclockwise via this belt 10, and the tension of this belt 10 pulls the drive rotor 5 in the direction of the supply side rotor 3a. . A gear 11 and a cam 12 that rotate together with the gear 11 are provided at a lower position on the base 1 as shown in the figure, and this gear 11 is always urged to rotate clockwise by a motor (not shown). There is. This gear 11 is provided with two stoppers 11a and 11b at an interval of about 180 degrees. Also, this stopper 11 is placed on the base 1.
Trigger lever 1 for locking a and 11b
3 is swingably provided, and a trigger solenoid 14 for driving this lever 13 is provided. The trigger lever 13 is biased clockwise by a spring (not shown), that is, in a direction in which the claw portion 13a at the tip locks each stopper 11a, 11b, and when the trigger solenoid 14 is energized, the trigger Lever 13
is rotated counterclockwise, and the locking of the stoppers 11a and 11b by the claw portion 13a is released. Further, a switching lever 15 is provided on the base 1 so as to be freely slidable in the vertical direction in the figure, and is always urged downward in the figure by a spring (not shown). A contact surface 15a for the cam 12 is formed at the center of the switching lever 15, and a guide groove 16 is formed at the upper end of the switching lever 15 in the drawing. As shown in FIG. 2A and below, the guide groove 16 has a neutral recess 16a at the upper end and two passages 16 that branch and extend downward.
b, 16c and a branch point 16d of both passages 16b, 16c. The protrusion 8a at the tip of the auxiliary lever 8 is engaged so as to trace inside this guide groove 16. Further, on the left side of the auxiliary lever 8, a selection lever 17 and a selection solenoid 18 for driving the selection lever 17 are provided. The selection lever 17 is rotatably supported by a fulcrum 19 on the base 1, and is biased counterclockwise (in the direction of arrow C in FIG. 3) by a spring (not shown). When the selection solenoid 18 is energized, the selection lever 17 is pulled clockwise (in the direction of arrow 2 in FIG.
It acts to push the projection 8a in the right direction in the figure.

Next, the operation of the drive mechanism of the tape recorder with the above configuration will be explained.

Figure 1 shows the stopped state, that is, FF operation, REW
This shows a state in which neither of the operations is performed. At this time, the claw portion 13a at the tip of the trigger lever 13 engages the stopper 11a of the gear 11, and the gear 11 is stopped. By the way, cam 1
2 is in a downward state in the figure, and the switching lever 15 is not restrained, so the switching lever 15 is moved downward in the figure by the elastic force of a spring (not shown). Further, since the protrusion 8a of the auxiliary lever 8 is fitted into the neutral recess 16a of the guide groove 16 of the switching lever 15, the driving rotary body 5 is connected to the winding side rotary body 4.
and the supply side rotating body 3a. In this state, the rotational force of the motor is transmitted to the pulley 9 and the drive rotating body 5 via the belt 10 (counterclockwise), but the rotational force is not transmitted to the two rotating bodies 3a and 4. In addition, selection solenoid 18
is in a non-energized state, and the selection lever 17 is moved in the direction of arrow C in FIG. 3 by a spring (not shown), and the lever tip 17a is disengaged from the protrusion 8a. The cassette tapes are stacked and loaded on the base 1, and each reel stand 2 and 3 is fitted with a reel in the cassette.

Explain the rewind (REW) operation.

When the trigger solenoid 14 is energized for a short time while the selection solenoid 18 remains de-energized, the attracted plunger causes the trigger lever 13 to move counterclockwise. As a result, the claw portion 13a at the tip of the lever 13 comes off the stopper 11a, and the gear 1
1 is driven by a motor and rotates clockwise. The trigger lever 13 immediately returns to its original state, the other stopper 11b hits it, and the gear 11 moves to approximately
Rotate 180 degrees and stop. Cam 12 is also gear 1
1, the protrusion of the cam 12 presses the contact surface 15a of the switching lever 15. Therefore, the switching lever 15 slides upward in the figure (in the direction of arrow A in FIG. 3). When the switching lever 15 begins to slide, the protrusion 8a of the auxiliary lever 8 comes out of the neutral recess 16a of the guide groove 16. Since the driving rotary body 5 and the pulley 9 are pulled in the direction of the supply side rotary body 3a by the tension of the belt 10, the neutral recess 16
The protrusion 8a that has come off from the guide groove 16 is guided into the passage 16b on the left side of the guide groove 16. After that, switch lever 1
5 in the direction of arrow A, the protrusion 8a moves to the inner part of the passage 16b (the state shown in FIG. 2A).
As a result, the swing lever 6 is swung clockwise via the auxiliary lever 8, and the drive rotary body 5 engages with the supply side rotary body 3a. Therefore, the rotation of the motor is transmitted from the driving rotary body 5 to the supply side rotary body 3a, and the supply side reel stand 3 rotates clockwise at high speed. The tape is then rewound by the reel inside the cassette.

To stop the REW operation, the trigger solenoid 14 is energized again for a short time, the trigger lever 13 is rotated counterclockwise, and the claw portion 13a at the tip of the lever is removed from the stopper 11b. As a result, the gear 11 rotates about 180 degrees again, the stopper 11a hits the claw portion 13a, and the gear 11 returns to the state shown in FIG. 1 and stops. The cam 12 rotates together with the gear 11, and the protruding part of the cam 12 engages the switching lever 1.
5, the switching lever 15 is moved downward in the drawing by the force of the spring. Then, the protrusion 8a fits into the neutral recess 16a of the guide groove 16, the drive rotor 5 returns to the neutral position, and power transmission to the supply reel stand 3 is cut off.

Next, the fast forward (FF) operation will be explained.

In the case of FF operation, the selection solenoid 18 as well as the trigger solenoid 14 is energized. When the trigger solenoid 14 is energized, the claw portion 13a of the trigger lever 13 is disengaged from the stopper 11a, and the gear 11 is rotated approximately 180 degrees, as in the REW operation. Then, the cam 12 rotates about 180 degrees, and the switching lever 15 is pushed by the cam 12 and moves upward in the figure (in the direction of arrow A in FIG. 3). Then, the protrusion 8a of the auxiliary lever 8 is inserted into the neutral recess 16 of the guide groove 16.
deviate from a. As mentioned above, selection solenoid 18
Since the selector lever 17 is also energized, the selection lever 17 rotates clockwise (in the direction of arrow D in FIG. 3), and the lever tip 17a pushes the protrusion 8a to the right in the figure. Therefore, when the switching lever 15 moves in the direction of arrow A, the protrusion 8a moves into the passage 16c on the right side of the guide groove 16.
Guided within. Thereafter, when the switching lever 15 moves, the protrusion 8a passes through the branch point 16d and enters the inner part of the right passage 16c (the state shown in FIG. 2B). Then, the auxiliary lever 8 and the swinging lever 6 are swung counterclockwise, and the driving rotary body 5 is engaged with the winding side rotary body 4. The rotation of the motor is transmitted to the rotating body 2b via the winding-side rotating body 4, and the winding-side reel stand 2 rotates counterclockwise at high speed to rapidly feed the tape.

In addition, when the selection solenoid 18 is energized during the above operation, the selection lever 17 rotates in the direction of arrow D, and the lever tip 17a moves toward the auxiliary lever 8.
(state shown in FIG. 3). At this time, due to the tension of the belt 10, the swing lever 6
Since the auxiliary lever 8 is pulled to the left in the figure, the protrusion 8a at the tip of the auxiliary lever 8 is connected to the selection lever 1.
It is in pressure contact with the tip 17a of 7. Lever tip 17
Due to the positional relationship between a and the fulcrum 19, the pressing force by the protrusion 8a acts to rotate the selection lever 17 in the direction of arrow D. Therefore, selection solenoid 1
Even if the selection solenoid 18 is immediately de-energized after the selection solenoid 18 is energized to reach the state shown in FIG. 3, the auxiliary lever 8 and the selection lever 17 continue to maintain the state shown in FIG. Then, in the process of moving the switching lever 15 in the direction of arrow A, the inclined side of the branch point 16d of the guide groove 16 comes into contact with the protrusion 8a, and the protrusion 8a is guided into the right passage 16c by this inclined side. . At this time, the protrusion 8a separates from the selection lever 17, and the selection lever 17 becomes free and rotates in the direction of arrow C by the force of the spring, returning to the state shown in FIG.

When stopping the FF operation, the trigger lever 13 is operated by the trigger solenoid 14 in the same way as stopping the REW operation, and the claw portion 13a at the tip of the lever is removed from the stopper 11b. As a result, the gear 11 rotates approximately 180 degrees, the cam 12 separates from the switching lever 15, and the switching lever 15 moves in the direction of arrow B by the force of the spring, returning to the state shown in FIG. Then, the protrusion 8a of the auxiliary lever 8 fits into the neutral recess 16a of the guide groove 16, and the drive rotary body 5
is returned to the neutral position, and power to the take-up reel stand 2 is cut off.

In the illustrated embodiment, the guide groove 16 is provided on the switching lever 15 side and the protrusion 8a is provided on the auxiliary lever 8; Grooves may also be formed. Further, each of the rotating bodies 3a, 4, and 5 may be not a gear but a reel that presses against each other to transmit power. In addition, in the illustrated embodiment, the drive rotating body 5
is biased by the tension of the belt 10, but the swing lever 6 may be biased clockwise by a spring, or the swing lever 6 may be biased clockwise by a selection solenoid in the direction opposite to the spring during FF operation. You can also push (pull) it directly.

As described above, the present invention provides the following effects.

(1) If the selection solenoid mechanism guides the protrusion 8a to either of the two passages of the guide groove 16, then as the switching lever moves, the driving rotary body is selectively switched to the take-up side rotary body or the supply side rotary body. The operation button becomes an electric switch, and a reliable switching operation can be achieved by operating the feather touch.

(2) Once the selection solenoid 18 is energized, the protrusion 8a
Even if it is immediately de-energized when it enters the passage 16c of the guide groove 16, it is guided into the passage 16c and the driving rotary body reliably engages with the winding-side or supply-side rotary body. It is economical because the energization time of the solenoid is short.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the tape recorder drive mechanism according to the present invention, FIGS. 2A and 2B are partial plan views showing the relationship between the protrusion and the guide mechanism for each operation, and FIG. 3 is a partial plan view showing the selection solenoid mechanism. It is. 1...Base, 2...Take-up side reel stand, 3...
Supply side reel stand, 3a... Supply side rotating body, 4...
Winding side rotating body, 5... Drive rotating body, 6... Rocking lever, 8... Auxiliary lever, 8a... Protrusion, 12...
...Cam, 15...Switching lever, 16...Guide groove, 16a...Neutral recess, 16b, 16c...Passage, 17, 18...Selection solenoid mechanism.

Claims (1)

[Scope of utility model registration request] A take-up side rotating body that rotates together with the take-up side reel stand, a supply side rotating body that rotates together with the supply side reel stand, and a driving rotation that is movable between the two rotating bodies and is driven by a motor. An auxiliary lever is provided for selectively moving the driving rotary body in a direction in which it engages with either the take-up side rotary body or the supply side rotary body, and on the other hand, it rotates by a certain angle in accordance with the operation timing. A cam is provided, and a switching lever that is moved by being pushed by the cam is provided, and either the switching lever or the auxiliary lever has a
A guide groove consisting of two branched passages is provided, and a protrusion is provided on the other side for tracing either passage of the guide groove and moving the auxiliary lever to the selected position when the switching lever is moved by a cam. What is claimed is: 1. A drive mechanism for a tape recorder, comprising: a selection solenoid mechanism for tracing the protrusion into any one of the guide grooves;