JPS61139964A - Automatic inversion and automatic stop device - Google Patents

Abstract

PURPOSE:To make a device small in size and light in weight, and to apply it to a center captain system by releasing a lock of an operating member by the third lock member by the second stroke, without releasing a lock of the first operating member by the first stroke of the first lock. CONSTITUTION:The forward turn mode is switched to the inversion mode by a forward and backward switching rod 21 by moving a forward and backward switching button 40, and a state of its forward turn mode is locked by an automatic inversion lock rod 17 having the first and the second strokes. Also, a terminal of a tape of the time of the forward turn mode is detected by a forward turn use detecting hook 16, and whether the rod 17 is held in that position or not is selected by a mode switching lever 22. Also, a lock of a reproducing rod 13 or a sound recording rod 43 is not released by the first stroke of the rod 17 by a lock rod 15 but the respective locks are released by the second stroke, and the device is made small in size and light in weight, and it is applied to a center captain system.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an automatic reversal/automatic stop switching device for a magnetic recording/reproducing device.

BACKGROUND ART In recent years, magnetic recording and reproducing devices have become smaller, lighter, and more multifunctional, and in particular, various automatic reversing devices and automatic stopping devices have been developed.

Referring to the drawings below, the above-mentioned conventional automatic reversing and
An example of an automatic stop switching device will be explained.

6 and 7 show the main parts of a conventional automatic reversal/automatic stop switching device. In FIG. 6, reference numeral 101 denotes a reel stand arm rotatably provided on a reel stand (not shown) via a member 797717, and a detection gear that rotates at a constant speed counterclockwise.

The detection arm is provided on the trigger rod 104, which is biased by a spring 114 and is freely slidable, so as to be rotatable about a shaft 115. Reference numeral 105 denotes a power cam, which is provided with intermittent gears with missing teeth at two symmetrical positions on the outer circumference, and has an eccentric cam surface 106b and a pin 106o on the back surface. Reference numeral 106 denotes a slidable forward/reverse switching rod, which is driven by the power cam and switches the drive transmission to the pinch rollers and reel stand mechanism (not shown) for each of the forward and reverse directions. 10
Reference numeral 7 denotes a slidable play rod biased by a spring 116, which is biased by a spring 117 and locked by a slidable lock rod 108. A hook 109 is rotatably provided around a shaft 118 implanted on the lock rod. 110 is a selection lever rotatably provided on a shaft 119;
is slidably provided in the guide groove 121 of the selection lever. 111 is a flywheel that rotates at a constant speed, and 113 is a gear that rotates at a constant speed and meshes with a gear on the outer periphery when the power cam 105 rotates several degrees.

The operation of the conventional automatic reversal/automatic stop switching device will be described below.

First, when you press the operation button (not shown), the play rod 107
is locked by the lock rod 108, and the tape runs at a constant speed. While the tape is running at a constant speed, the reel stand arm 10
1 is given a rotational bias through a friction member by rotating a reel stand (not shown), and rotates the detection arm 103 in the right direction. Then □Detection arm 10
The pin 1o3& implanted in the tape 1o3& always moves away from the hook 1022L of the detection gear 102, which rotates at a constant speed counterclockwise, and continues to run the tape at a constant speed.

Next, at the end of the tape, the reel stand (not shown) stops rotating, the reel stand arm 101 is no longer biased to rotate, and the detection arm 103 also stops rotating. Then, the claw 102& engages with the pin 103a, and the rotational force of the detection gear 102 causes the detection arm 103 to move forward in the entry direction together with the trigger rod 104. At this time, if the power cam 106 is disengaged from the claw 1041L of the trigger rod, it will rotate approximately 10 degrees counterclockwise due to the urging force of the spring 112, and the intermittent gear 1051L provided on the outer periphery will mesh with the gear 113 rotating at a constant speed. 1 until it no longer receives rotational drive due to the next intermittent part.
Rotates 800 times.

Then, the eccentric cam surface 105b provided on the back surface of the power cam 106 guides the pin 106a implanted in the forward/reverse switching rod 106, and the forward/reverse switching rod 106 slides to the right, causing pinch rollers (not shown) for each of the forward and reverse sides to slide. and switching the rotational drive to the reel stand, etc., and move to the reversal mode. At this time, when the selection lever 110 is turned to the automatic stop side, the hook 109 is connected to the pin 10 implanted on the back side of the power cam 105.
5C, the lock rod 108 moves to the left together with the hook 109, and when the lock rod 108 is disengaged from the play rod 10a, the play rod 107 returns to its stopped state.

However, if the selection lever 110 is moved to the continuous one-motion reversal side, the tape ends, and even if the power cam 106 rotates, the hook 1
09 does not engage with pin 105C+. Therefore, in this case, only automatic reversing operation is performed, and automatic stopping operation is not performed.

Problems to be Solved by the Invention However, with the above configuration, the power cam 106 must continue to rotate counterclockwise during automatic reversal and automatic stop operations. Considering the application to a microcassette tape recorder, it is difficult to reduce the size and weight of the two-capstan system, which constantly rotates the drive system such as the motor and flywheel in the same direction.

Furthermore, with the center capstan system unique to micro cassette tape recorders, it is necessary to reverse the rotation direction of the capstan when switching between forward and reverse directions, and the power cam 106 rotates in the opposite direction during automatic reversal and automatic stop operations, making it impossible to use the conventional configuration. It is difficult to utilize.

In view of the above-mentioned problems, the present invention provides an automatic reversal/automatic stop switching device that can be configured to be small, lightweight, and inexpensive, and can also be applied to a center capstan type micro cassette tape recorder, which has been difficult to do in the past. It is.

Means for Solving the Problems In order to solve the above problems, the automatic reversal/automatic stop switching device of the present invention includes a forward/reverse switching member having means for switching from the first running mode to the second running mode, and the above-mentioned a first locking member that locks the forward/reverse switching member in a first running mode position and has first and second strokes; and a second locking member that locks the forward/reverse switching member in the first running mode position. a locking member; a tape that detects the end of the tape during a first running mode, biases the first locking member at the end of the tape, and does not bias the first locking member during a second running mode; and a 30th locking member that does not unlock the operating member during the first stroke of the first locking member and unlocks the operating member during the second stroke of the first locking member; By locking the forward/reverse switching member, automatic stop is effected, and by not locking, automatic reversal is effected.

Function The automatic reversal/automatic stop switching device of the present invention is such that when the forward/reverse switching member is locked in the first running mode position by the second locking member at the end of the tape in the first running mode, the drive system also switches to the first running mode position. The first locking member moves to the second stroke while maintaining the first running mode state, releases the engagement between the third locking member and the operating member, and automatically stops, and the second locking member switches between the forward and reverse directions. If the member is not locked, the first stroke of the first locking member unlocks the forward/reverse switching member to automatically switch to the second running mode, and at the same time biases the first locking member. The tape continues to run in the second running mode without interrupting the operation and automatically stopping, and can be applied to center cap nut type micro cassette tape recorders, etc., which were difficult to do in the past. be.

EXAMPLE Below, an automatic reversal/automatic stop switching device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the main parts of an automatic reversal/automatic stop switching device according to an embodiment of the present invention, and FIG. 2 shows its entire integrated view. In Figure 1, 1 is a flywheel, 2 is a flywheel gear integrated with flywheel 1, 3 is a capstan,
4 is the intermediate gear that meshes with the flywheel gear 2, 5 is the 61 ear that meshes with the intermediate gear 4, 6 Yu□work, A, Ya, Arro,
j The planetary gear device 6 has a rotation center axis 1o of the intermediate gear 4.
The shafts 8 and 9 are rotatably mounted on a planetary gear lever 7, which is rotatably provided with 0 and 0, respectively. Reference numeral 11 denotes a normal rotation reel gear meshing with the planetary gear device 6, and 12 a reel hook provided on the normal rotation reel gear 11 via a friction member. Reference numeral 13 denotes a regeneration rod that is biased by a spring 33 and is slidably provided, and has a regeneration button 14 integrated therein. A lock rod 16 locks the playback rod 13 and a recording rod 43, which will be described later, and is biased by a spring 47 and is slidably provided.

Reference numeral 16 denotes a normal rotation detection hook, which is biased by a spring 66 and is rotatably provided on the slidable automatic reversing lock rod 17, and its rotation fulcrum shaft 18 is connected to a groove 19 provided in the board.
guided by. 20 is an automatic reversal lock rod 17
The forward/reverse switching rod 21 (described later) with a lock pin implanted in the
lock.

The forward/reverse switching rod 21 controls the position of each of the forward/reverse heads (not shown) and controls a switch (not shown) for switching the motor current between the forward/reverse directions. Reference numeral 22 designates a mode switching lever which is integrally provided with a locking mechanism 23 and is rotatably provided around a shaft 48. Reference numeral 24 denotes a forward rotation S lever that is rotatably provided around a shaft 49. When the automatic reversal lock rod 1a moves forward, the shaft 32 attached to the forward rotation S lever 24 is biased to the left. Then, the forward rotation lever SL/par 24 is rotated counterclockwise, and the forward rotation lever S lever 24 urges the lock rod to the left. 25 is clockwise.

Motor that can rotate in both counterclockwise directions, 26 is motor boot 1
The belt is placed between the 750 and Flyhoi/L/1.

In FIG. 3, 28, 29, 30, and 31 are a sun wheel and a control wheel, respectively, which constitute the planetary gear system 6.

The sun wheel 28 is a planetary wheel and a detection wheel, and is rotatably mounted on the aforementioned shaft 9, and is coupled to a relay gear.

Further, when the planetary gear lever rotates counterclockwise, it meshes with the forward rotation reel gear 11, and when it rotates clockwise, it meshes with the reversal IJ-/S° gear 36. The control wheel 29 is rotatably provided coaxially with the sun wheel 28, and as described above, when the planetary gear lever 7 rotates counterclockwise, it meshes with the gear 46 integrated with the reel knob 12 on the forward rotation side, and the clock is rotated. When it rotates in the direction, it meshes with a gear (not shown) that is integrated with the rotation hook 61 on the reverse side. The planet wheel 30 is rotatably provided on a shaft 29& that is integral with the control wheel 29, and meshes with a small gear 28& that is integral with the sun wheel 28. The detection wheel 31 is rotatably provided coaxially with the sun wheel 28, and has an internal gear 3 meshing with the planetary wheel 30.
1a1, and a claw 31b that engages with the normal rotation detection hook 16 and the reversal detection hook 37 is provided on its outer periphery.

Further, in FIG. 2, reference numeral 37 denotes a reversal detection hook which is provided with a rotation fulcrum shaft 38, and the rotation fulcrum shaft 38 is guided by a groove 62 provided in the substrate. Reference numeral 39 denotes a reversing lever S that is rotatably provided on the shaft 53, and its tip abuts against the rotation fulcrum shaft 38 of the reversing detection hook 37, and the reversing detection hook 37 is inserted into the groove 52 of the board. As it moves forward while being guided, it is rotated clockwise and biased to the left,
The engagement with the playback rod 13 or the recording rod 43 is released. Reference numeral 40 denotes a forward/reverse switching button, which is connected to the normal/reverse switching rod 21 by a spring 42, and is slidably provided on the guide 41. 43 is integrally provided with a recording door 1 tough 45. It is biased by a recording spring 54 and can slide freely. Reference numeral 44 denotes a reversal prevention lever, which is rotatably provided on a shaft 55 embedded in the base plate, and biased clockwise by a spring (not shown).

The operation of the automatic reversal/automatic stop switching device configured as described above will be explained below with reference to FIGS. 1 to 5.

First, FIG. 2 is an overall view showing the stopped state. First, when the regeneration button 14 is pressed, the regeneration rod 13 moves forward and is locked by the lock rod 15. A switch (not shown) is turned on, the motor 25 rotates at a constant speed, and the belt A constant speed rotation is transmitted clockwise to the flywheel 1 via 26, and the normal rotation regeneration state is entered as shown in FIG. The constant speed rotation of the Flywheel/I/1 is carried out from the flywheel gear 2 integrated with the flywheel 1 to the intermediate gear 4. The relay gear 6 degrees is transmitted to the reel gear 11 via the sun wheel 28 which is a part of the planetary gear device 6, and is transmitted to the reel hook 12 via the 797717 member 27 to wind up a tape (not shown).

While the tape is running at a constant speed, the IJ-tV hook 12 rotates and winds up the tape, and the rotation is transmitted from the gear 46 integrated with the reel hook 12 to the control wheel 29 which is coaxial with the sun wheel 28 and is rotatable. , the planetary wheel 3o, which is rotatably provided on a rotating shaft 29 & which is integrally provided with the control wheel 29 and meshes with a small gear 28 B which is integral with the sun wheel 28, revolves itself in a counterclockwise direction about the axis 9. However, the detection wheel 31 whose internal gear 31& meshes with the planetary wheel 30 rotates counterclockwise.

Then, as shown in FIG. 4, the forward rotation detection hook 16 swings about the rotation fulcrum 18 so as to escape the claw 31b of the detection wheel 31, and the tape continues to run at a constant speed.

However, at the end of the tape, the reel hook 12 stops, and the control wheel 29 transferred to the reel hook 12 also stops, and the planetary wheel 30 does not revolve, but rotates twice due to the rotation of the 28 sun wheels and pinion gears 2a&. Therefore, the detection wheel 31 meshing with the planetary wheel 30 rotates in the opposite direction to the sun wheel 28, that is, clockwise. Then, as shown in FIG. 4, the claw 31b of the detection wheel 31
engages with the forward rotation detection hook 16 and pushes the forward rotation detection hook 16 up in the B direction. Then, in FIG. 1, the forward rotation detection hook 16 moves forward together with the automatic reversal lock rod 17 along the groove 19 since its rotation fulcrum 18 is guided by the groove 19 of the base plate.

Then, the forward/reverse switching rod 21 becomes the automatic reversal lock rod 17.
With the first stroke of , the lock by the lock pin 2o installed in the automatic reversal lock rod 17 is released.

However, at this time, the lock pin 23 of the mode switching lever 22
When the forward/reverse switching rod 21 is locked, the forward/reverse switching rod 21 remains in the normal rotation state, the drive system also maintains the normal rotation state, and the automatic reversal lock rod 17 continues to move forward. Then, the automatic reversal lock rod 1A becomes the forward rotation user S.
Push the shaft 32 attached to the lever 24 to the left, rotate the forward As lever 24 counterclockwise, and
The lever 24 slides the lock rod 16 to the left, and the engagement between the lock rod 15 and the regeneration rod 13 is disengaged, and the regeneration rod 13 is restored by the biasing force of the spring 33, returning to the stopped state.

However, when the tape ends with the lock pin 23 of the mode switching lever 22 not locking the forward/reverse switching rod 21, the first stroke of the automatic reversing lock rod 1 closes the lock pin 2o and the forward/reverse switching rod 21. The engagement is released, and the forward/reverse switching rod 21 moves to the right by the biasing force of the spring 34. At this time, the pin 3 implanted in the forward/reverse switching rod 21
5 rotates the planetary gear lever 7 clockwise around the shaft 1o to engage the planetary gear device 6 with the v −/l/ gear 36 for reverse rotation, and at the same time, rotates the planetary gear device 6 from the detection hook 16 for forward rotation. By separating them, the forward rotation detection hook 16 and the automatic reversal lock rod 17 are cut off, thereby interrupting the automatic stop operation. At this time, the planetary gear device 6 is moved within the operating range of the reversing detection hook 37, and a leaf switch (not shown) for switching the motor current between normal and reverse directions is switched to change the polarity of the motor current and rotate the motor in the reverse direction. Control is performed to move the normal rotation head (not shown) backward and the reversal head forward, and the apparatus shifts to the reversal playback state as shown in FIG. 5.

While the tape is running at a constant speed in the reverse playback state, the reversal detection hook 3 continues to swing about the shaft 38, as shown in FIG. When the end of the tape is reached, the detection wheel 3 is activated as described above.
The claw 31b of 1 engages with the reversal detection hook 37, pushes the reversal detection hook 37 forward, and the reversal detection hook 3
Rotate the reversing lever S lever 39 in contact with the shaft 38 in the clockwise direction to move the lock rod 15 to the left, unlock the regeneration rod 13, return it, and stop it.

Next, when manually switching between the forward and reverse rotations, as shown in FIG. When pushed by the button 40, the forward/reverse switching rod 21 also moves to the left while resisting the biasing force 1 of the spring 34, and the lock pin 2o planted in the automatic reversing lock rod 17, which is biased by the spring 42, is activated. locked in rotation mode position.

When switching from forward rotation to reverse rotation, move the forward/reverse switch button 4Q to the right, and the forward/reverse switch rod 21 will move to the lock pin 2o.
Therefore, first, only the forward/reverse switching button 40 moves to the right against the biasing force of the spring 42 that connects the forward/reverse switching rod 21 and the normal/reverse switching button -0. However, at this time, the cam 40 & of the forward/reverse switching button 4o pushes the lock pin 2o forward, disengaging it from the forward/reverse switching rod 21, and the normal/reverse switching rod 21 moves to the right due to the urging force of the spring 34 and the spring 42. Slides to the reverse mode position and switches to reverse mode.

In addition, in FIG. 1, when the recording rod 43 has returned to its original state due to the biasing force of the spring 44, the reversal prevention lever 44, which is biased to rotate clockwise by a spring (not shown), is counterclockwise rotated by the arm 43& of the recording rod 43. The locking portion 44a is spaced apart from the forward/reverse switching button 40,
By moving the forward/reverse switching button 4o, it is possible to freely change the normal/reverse direction manually.

However, when the recording button 45 is pressed and the recording rod 43 is locked by the lock rod 15 and enters the recording state, the rotational bias of the arm 43a of the recording rod 43 is released, and the biasing force of a spring (not shown) When rotated clockwise, the forward/reverse switching button 4o is locked by the lock portion 44&, thereby preventing a manual forward/reverse switching operation.

When the end of the tape is reached in the forward recording state, the automatic reversal lock rod 17 is urged by the planetary gear device 6 and slides forward in the same manner as described above, and the projection 172L rotates the reversal prevention lever 44 counterclockwise. At the same time, the lock portion 44L is separated from the forward/reverse switching button 4o to release the lock, and at the same time, the lock pin 20 unlocks the normal/reverse switching rod 21, and the biasing force of the spring 34 causes the forward/reverse switching rod 21 to move as described above. slides to the right and enters the reverse recording state.

As described above, according to this embodiment, the forward/reverse switching rod 21 having the spring 34 for applying a biasing force for switching from normal rotation to reverse rotation, and the forward/reverse switching rod 21 are locked at the 1-rotation mode position. An automatic reversal lock rod 1a having a second metro lock, a mode switching lever 22 that locks the forward/reverse switching rod 21 in the forward rotation mode position, and an automatic reversal lock rod 22 that locks the forward/reverse switching rod 21 in the forward rotation mode position, and automatically reverses the tape end when the tape ends during the forward rotation mode. The lock rod 17 is energized and the lock rod 1 is automatically reversed during the reversal mode.
Planetary gear device 6 that does not energize 7 and forward rotation detection hook 1
6, and a lock rod 16 that does not unlock the playback rod 13 or the recording rod 43 during the first stroke of the automatic reversing lock rod 17 and releases the lock of the playback rod 13 or the recording rod 43 during the second stroke, By locking the forward/reverse switching rod 21 with the mode switching lever 22, it is possible to switch to automatic stop, and by not locking it, it is possible to switch to automatic reversal.

Effects of the Invention As described above, the present invention provides a forward/reverse switching member having a means for switching from a first running mode to a second running mode, and a forward/reverse switching member that locks the above-mentioned normal/reverse switching member in the first running mode position. and a first locking member having a second stroke, and a second locking member that locks the forward/reverse switching member in the first travel mode position.
a locking member, which detects the end of the tape during the first running mode, energizes the first locking member at the end of the tape, and presses the second locking member.
The tape end detection means does not energize the first locking member during the running mode, and the operating member is not unlocked during the first stroke of the first locking member but is activated during the second stroke. By providing a third locking member that releases the lock, it is possible to switch to automatic stop by locking the forward/reverse switching member with the second locking member, and to switch to automatic reversal by not locking.

[Brief explanation of the drawing]

FIG. 1 is a top view of essential parts showing a forward running state in an embodiment of the present invention, FIG. 2 is a top view showing a stopped state, and FIG. 3 is a cross-sectional view of FIG. 2 showing the drive system. Figure 4 is a top view of the main parts showing the tape end detection mechanism, Figure 5 is a top view of the main parts showing the reversing running state, Figure 6 is a top view of the conventional automatic reversal/stop device, and Figure 7 is the main parts. FIG. 1...Flywheel, 2...Flywheel gear, 4...Intermediate gear, 6...Relay gear, 6...Planetary gear device, 7 ... Planetary gear lever, 11 ... Forward rotation reel gear, 12.
... Reel footer, 13 ... Regeneration rod, 15 ... Lock rod, 16 ... Forward rotation detection hook, 17 ... Automatic reversal lock Rod, 21...Forward/reverse switching rod, 22...
・Mode switching lever, 24... Forward rotation S lever, 26... Motor, 26... Belt, 28... Sun wheel, 29... ...Control car, 3
o... Planetary car, 31... Detection car, 37
...Reversing detection hook, 39... Reversing S lever, 40... Forward/reverse switching button, 43.
... Recording rod, 44 ... Reversal prevention lever, 101 ... Reel stand arm, 1o2 ...
...Detection gear, 103...Detection arm, 104.
...Trigger rod, 105...Power cam, 106...Reverse switching rod, 107...
...Play rod, 108...Rock rod,
1o9...Hook, 110...Selection lever, 111...Flywheel. Name of agent: Patent attorney Toshio Nakao and 1 other person12
1m, -1-Flywheel 21--One straight and cut J# rod I6---Forward rotation t7 7 5o--
-Moduff -Re 17--Automatic and Junro 70do
5F--Saw 2 Ref-17/--7 Lie Az Il Figure 4/--7 Foil 13-11 Rei wad tot-11 Whirl stand arm l02-m-Detection a103- 11 button-out arm t04 ---) - Wagger rod taS-- Re(2, fiA toB-- 1 lock rod nt-1-7 life rod lθ1 tto- = tR reno-

Claims (1)

[Claims] a forward/reverse switching member having means for switching from a first running mode to a second running mode; and a first lock that locks the normal/reverse switching member in a first running mode position and has first and second strokes. a second locking member that locks the forward/reverse switching member in a first running mode position; and a second locking member that detects a tape end during the first running mode and biases the first locking member when the tape ends. tape end detection means that does not energize the first locking member during the second running mode;
A third locking member is provided that does not unlock the operating member during the first stroke of the first locking member and unlocks the operating member during the second stroke; An automatic reversal/automatic stop switching device characterized in that locking the switching member causes automatic stop, and not locking the switching member causes automatic reversal.