JPS6038775B2 - Auto stop and auto start mechanism in tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an auto-stop and auto-start mechanism in a tape recorder.

Although auto-stop mechanisms and auto-start mechanisms have conventionally existed, they are separate mechanisms, which are disadvantageous in terms of cost and complicated to operate.

Therefore, the present invention aims to make it possible to distinguish auto-stop and auto-start by changing the movement locus of a special plate, and to enable auto-stop and auto-start to be performed by the same mechanism.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the diamond part of the chassis 1, and FIG. 2 shows the front part of the chassis, and this mechanism is constructed by superimposing the structure of FIG. 2 on the structure of FIG. 1. First, in Figure 1,
The sliding plate 2 located on the back of the chassis 1 includes a guide projection 2a that projects from the chassis to the front, a boss 2b to which the shaft 3 is fixed, and a lock for the operating lever 0 (not shown) when lowered. Member 2 for unlocking the plate (not shown)
An end portion 2c for pressing 0 is formed, and its post 2b is located within the guide hole 4a of the base 4. The entire sliding plate 2 is moved upward by the tensile force of the spring 5, and is also given a rotational force in the direction of arrow A in FIG. 1A. On the back side of the base 4 of the shaft 3 described above, a follower plate 6 and a pulley 8, which receives rotation of a winding roll (not shown) via a belt 7, are attached by friction iron in a correlated manner. .

Therefore, the follower plate 6 can be rotated by receiving the rotational force of the pulley 8. Further, this follower plate 6 is formed with a protrusion 6b that engages with a protrusion 9a of the worm cam 9 and is pushed downward. This worm cam ring 9 has the protrusion 6
Cam theory parts 9b and 9c for guiding the cam parts 9b and 9c are formed symmetrically and facing each other, and the protrusion 9a is formed in the center of the widest part.

Further, the interval at the narrowest part is slightly wider than the width of the protrusion 6b of the follower plate 6. The cam portions 9b and 9c in FIG. 1A are shown centered on the narrowest portions.
Both of these cam theory parts 9b and 9c guide the protrusion 6b to the center of the cam ring parts 9b and 9c, so when no rotational force is acting on the follower plate 6, the protrusion 6b remains guided to the center. Then, it is stopped by the rotating protrusion 9a and pushed downward. A worm 10 meshes with the teeth 9d of the worm cam ring 9, and receives rotation of a flywheel (not shown) via a belt 11 at its pulley portion 10a, thereby moving the worm cam ring 9 in the direction of arrow B. Rotate it.

Reference numeral 12 denotes a biasing arm with a protrusion 12a at the tip protruding from the closed portion 4b of the base 4, which is constantly given rotational force in the direction of arrow C by a spring 13, and this rotational force pushes the upper part of the follower plate 6, thereby pushing the follower plate 6. It is now possible to press in the direction of the arrow ○ in 6.

Next, as shown in FIG. 2 showing the front part of the chassis, a standby plate 14 and a pause plate 15 are stacked in order on the chassis 1, and a locking bar 16 is stacked on top of the pause plate 15. It is being

A biasing arm 12 is attached to the standby plate 14.
A guide hole 14a with an enlarged upper left side in which the protrusion 12a of the lock lever 1 is located, a guide hole 14b inclined in the lower right direction from which the protrusion 2a of the sliding plate 2 protrudes, and a guide hole 14b with the lock lever 1 in the lower part thereof are formed.
A shaft 17 on which 6 is supported is provided as a pin.

The pause plate 15 has a protrusion 12a of the biasing arm 12.
The guide hole 15a of the lower left expansion gate where is located, the lock lever 1
A guide hole 15b is formed to be guided by the shaft 17 of No.6.

Both the standby plate 14 and the pause plate 15 are constantly subjected to a downward moving force by a spring (not shown), and their vertical movement is guided by pin la and other pins provided on the chassis 1. .
The standby plate 14 also rises in the direction of arrow E when an auto-start plow (not shown) is pushed in, and returns to its original position when the plow returns.

Further, the pause plate 15 is raised in the direction of arrow F by pressing a pause button (not shown) for the first time, and returned to its original position by pressing a pause button (not shown) for the second time. As shown in FIG. This is done by lifting the bottle 15e to stop it on the stepped part 21a, and lifting it again to release it from the cut and raised part 21b.
The raised position is locked by the second rise, and the lock is released by the second rise to return to the original position. The lock lever 16 has a guide hole 14b of the standby plate 14.
An operating piece 16a protruding from the lower part of the pause plate 1
Arm portions 16b each have a protrusion 16q that engages with a pin 15c provided on the chassis 1. Under the rotational force in the direction of arrow G, it comes into contact with the pin 15c.

Although not shown, 19 is a pin provided on a known power transmission lever having an idler for transmitting the rotational power of the flywheel to the winding reel, and is used to raise the standby plate 14 in the direction of arrow E or pause plate 15. As it rises in the direction of arrow F, it is displaced from the position indicated by the solid line to the position indicated by the imaginary line, thereby moving the hydra and cutting off the power transmission of the flywheel to the take-up roll.

14c and 15d are standby plates 14,
The pinch arm 2 is moved by moving the standby plate 14 in the direction of the arrow E and moving the pause plate 15 in the direction of the arrow F using the pins provided on the pause plate 15.
2 in the direction in which the pinch loaf 21 moves away from the capstan.

In the above, the tape recorder plays, records, feeds,
Alternatively, when in the unwinding state, the mechanism of this embodiment is in the state shown in FIGS. Therefore, the follower plate 6 is rotated in either direction by receiving the rotational force of the pulley 8.

At this time, since the flywheel is also rotating, the worm 0 is also rotating, and therefore the worm cam 9 is also rotating in the direction of arrow B. Therefore, the follower plate 6 is connected to the cam of the rotating worm cam wheel 9. The protrusion 6b continues to be in contact with either of the cam ring parts 9b, 9c, so that the protrusion 6b is not held between the cam ring parts 9b, 9c, and therefore the protrusion 9a of the worm cam ring 9 In other words, as long as the take-up roll is rotating, the protrusion 6b of the follower plate 6 escapes from the protrusion 9a of the worm cam ring 9, and is not pushed downward by the protrusion 9a. However, when the cassette tape is wound up to the end, the rotation of the pulley 8 associated with the take-up roll is stopped, so the following plate 6 is no longer rotated.
No rotational force is applied to , and only frictional resistance exists between the follower plate 6 and the pulley 8.

However, since the flywheel continues to rotate during this time, the worm cam ring 9 is still rotating, and therefore, when the follower plate 6 is guided in the middle by the cam ring parts 9b and 9c, the intermediate position is changed to the above-mentioned frictional resistance. It comes to be held by existence. Therefore, the protrusion g that has rotated
a, the entire follower plate 6 is pushed down via the protrusion 6b, and the sliding plate 2 is also pushed down via the shaft 3, so that the lower end 2c of the sliding plate 2 pushes the member 20. A lock plate (not shown) is rotated to unlock any of the locked operation keys 0. In addition, at this time, the sliding plate 2
As shown in FIG. 5, the protrusion 2a is guided by the guide hole 14b of the standby plate 14, rotates slightly, and descends.
The state is displaced from the state shown by the two-dot chain line to the state shown by the solid line. That is,
Through the above-described operation, an auto-stop operation based on stopping the rotation of the winding reel is performed. Next, the autostart operation will be explained.

This is intended to cause the standby plate 14 to rise in the direction of arrow E by pressing an auto start button (not shown) and automatically start the tape recorder when the power is turned on using a timer or the like. The auto-start plow is pressed in at the same time as the plow and the recording button are pressed, the plow waits in this state, and the power is turned on by a timer or the like at a predetermined time to cause an auto-start. First, the second
As the pin 19 of the power transmission lever rises in the direction of arrow E in Figure 1A, it is pushed to the position indicated by the imaginary line in Figure 1A, cutting off the power transmission path to the winding reel, and at the same time pin 14c
rotates the pinch arm 22 to separate the pinch roller 21 from the capstan (not shown). Further, as shown in FIG. 3, as the guide hole 14b rises from the original position of the virtual cover, the sake plate 2 from which the protrusion 2a projects is rotated from the position of the virtual line to the position of the solid line. It undergoes a dynamic displacement and begins to run away from Bemura 20. At the same time, the shaft 1.7 mounted on the standby plate 14 is also displaced upward, so that the lock lever 16 mounted thereon also rises relative to the pause plate 15, and its protrusion 16
0 becomes locked to pin 15c. This locked state is maintained by a spring 18. Therefore, the lock lever 16 is turned off. In this state, the entire standby plate 14 maintains the raised position. In this state, when the power is turned on by a timer or the like, the flywheel starts rotating, and the worm cam 9 starts rotating through the rotation of the worm 0.

However, at this time, the winding reel is caused by the displacement of Piso 19.
Since the power transmission path thereto is cut off, it does not rotate, and therefore the follower plate 6 only has frictional resistance against the pulley 8. Therefore, at this time, similarly to the auto-stop operation, the protrusion of the follower plate 6 guided to the intermediate position by the cam ring parts 9b and 9c is pushed downward by the protrusion 9a of the worm cam ring 9, and as a result, the shaft 3 is Through this, the sliding plate 2 is also pushed downward. However, since the sliding plate 2 is guided further to the right and lowered by the guide hole 14b of the displaced standby plate 14 than during auto-stop, the lower end 2c no longer pushes the member 20. Therefore, the lock plate cannot be released.

However, the protrusion 2a that is guided down by the guide hole 14b presses the operating piece 16a of the lock lever 16, causing the lock lever 16 to rotate in the direction of arrow G' as shown in FIG. unlock. For this reason, the shaft 17 of the lock lever 16 is mounted on the standby plate 1.
4 also descends and returns to its original position, thereby transmitting power and the pin 19 of the bar also returns to the position shown by the solid line in Figure 1A, transmitting the power from the flywheel to the take-up roll, and the pinch roller 21 presses the magnetic tape against the capstan, and playback or recording begins. That is, through the above-described operation, an auto-start operation that starts with rotation of the flywheel upon power-on is performed. Next, the pause operation will be explained. When the pause plate 15 is pressed in (not shown), the pause plate 15 moves in the direction of arrow F in Figure 2 A.
Therefore, the pin 19 of the power transmission lever is moved to the position of the imaginary line to cut off the power transmission to the winding roll, and at the same time, the pinch arm 22 is rotated by the pin 15d to cap the pinch roller 21. Release from the stand to pause the playback or recording operation. Note that as a result of this, the rotation of the take-up roll stops and the pulley 8 also stops rotating, so it is thought that the follower plate 6 will be pushed downward by the rotation of the worm cam wheel 9 that moves on the rotating flywheel. However, this is prevented by the action of the biasing arm 12. That is, when the pause plate 15 rises, the protrusion 12a of the biasing arm 12, which was located in the narrow part of the guide hole 15a, moves toward the arrow C as the expanded part rises.
direction by the spring 13 (Fig. 6), and presses and rotates the follower plate in the direction of arrow D (Fig. 6 A).
. As a result, the protrusion 6b of the follower plate 6 is always guided in a state in which it is in pressure contact with one of the cam ring parts 9c of the worm cam ring 9, so that it does not catch on the protrusion 9a, and therefore, the playback or recording nail is locked. will not be lifted. Note that due to the rise of this pause plate 15, pin 1
5c also rises, so even if the standby plate 14 is raised in the direction of arrow E by operating the auto-start anchor in this state, the lock lever 16 will not be locked to the pin 15c. Also, if you press the pause button with the standby plate 14 locked to the lock lever 16,
As the pause plate 15 rises, the pin 15c is disengaged from the lock lever 16, so that the mechanism is switched from the standby state to the pause state. That is, priority is given to the pause operation, and the auto start button 0 and the pause button are not locked at the same time, so it is possible to prevent malfunctions when performing the auto start operation. As described above, according to the present invention, the auto-stop or auto-start mechanism is performed by displacement of the standby plate that selectively selects the movement trajectory of the navigation plate.

In addition, priority is given to pause operations, and the locked state of the standby plate can be released by pressing the pause plate, making it possible to configure the standby plate as a pressing operation member, improving operability and slow operation. This is extremely advantageous in terms of sheet-out, etc.

[Brief explanation of the drawing]

Figure 1 shows the chassis part of this mechanism, A is a front view, the mouth is a partially sectional right side view, and Figure 2 shows the chassis surface, A is a front view, and the mouth is a partially sectional view. , C is a front view of the pause plate locking mechanism, Figures 3 and 4 are explanatory diagrams of auto-start operation, Figure 5 is an explanatory diagram of auto-stop operation, and Figure 6 A is a front view of the pause plate lock mechanism. It is a partially explanatory diagram. 1...Chassis, 2...Sliding plate, 3...Shaft, 4...Base, 5...Spring, 6...Following plate, 7... Belt, 8...Pulley, 9...Worm cam theory, 10...Worm, 11...Belt, 12...Biasing arm, 13.・・・・・・
Spring, 14""" Standby plate, 15...
Pause plate, 16...Lock lever, 17...
...shaft, 18...spring, 19...power transmission pin, 20...bemura. Figure 1 Figure 2 Figure 3 Figure 4 or 5 Figure 6

Claims (1)

[Claims] 1. A cam means having a protrusion that rotates as the flywheel rotates, and as the reel rotates, the cam means constantly comes into contact with the cam means and is guided away from the protrusion, and when the reel stops rotating, the cam means is guided by the protrusion. A following plate that locks and moves; a sliding plate that moves in conjunction with the following plate; and a first position that is pushed in by a first pressing operation and is held in a pose state; The pause plate is returned to the original second position by the second pressing operation, and when the pause plate is in the first position, the pause plate is returned to the second position by being pushed from the first position in the non-pressed state. a standby plate that is locked and held in a position such that when the pause plate is in a second position the locking in the second position is disabled and that determines the trajectory of movement of the sliding plate in the first and second positions; In its first position, the standby plate guides the sliding plate, which is interlocked with the movement of the follower plate, toward the unlocking means of the operation button, and in its second position, it transmits the driving force to the reel. An auto-stop and auto-start mechanism for a tape recorder, characterized in that the path is cut off and the sliding plate, which is interlocked with the movement of the follower plate, is guided in the direction of a standby plate lock release means.