JPS6214898B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape end automatic stop mechanism for a cassette tape recorder.

Usually, a cassette tape recorder is equipped with an automatic stop mechanism that detects the tape tension or the stop of a rotating body at the end of the tape and stops the tape from running. In particular, the automatic stop mechanism that detects rotation stoppage is called a mechanical full auto stop, and the automatic stop mechanism works reliably at the end of the tape even in all tape running conditions, such as recording, playback, fast forwarding and rewinding, to prevent tape damage or damage to the tape recorder mechanism. This prevents wear on the parts. As part of this automatic stop mechanism, a rotating body related to tape running detects that the tape has stopped running, transmits the detection result to the drive mechanism, and applies a release force using the rotational force of the drive unit unrelated to tape running. There's something I'm getting. This automatic stop mechanism also needs to prevent malfunctions when the tape is stopped at the end of fast-forwarding or rewinding (so-called queue play) operations during playback, or when the tape is stopped due to other pause operations during slow playback. Many vehicles forcibly displace the travel stop detection member during each operation to prevent malfunctions. In this case, the detection member is forcibly displaced, but since the automatic stop mechanism is operating, periodic abnormal noises may be generated due to excessive frictional force or load, which may cause the user to feel an abnormality. and giving. Therefore, as a method to prevent malfunction, in the malfunction prevention necessary mode, the automatic stop mechanism is disabled by releasing the connection between the detection mechanism related to tape travel and the drive side not related to tape travel. Something came out.

However, in this case, the tape running stop detection mechanism detects that the tape has stopped running, and as a result, each operation is released by the rotational force of the drive side. At the same time as this release, the coupling on the drive side is released, but the tape running stop detection remains unchanged. The drawback was that the automatic stop mechanism would operate even if another operation was performed to continue the detection state.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cassette tape recorder having an automatic stop mechanism that eliminates the above-mentioned conventional drawbacks and operates stably and reliably.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view showing the stopped state. In FIG. 1, 1 is a pause operation member, 2 is a fast-forward operation member, 3 is a rewind operation member, 4 is a playback operation member,
5 is a recording operation member, and 6 is a stop operation member to which operation buttons 1a, 2a, 3a, 4a, 5a, and 6a are fixed, respectively, and are slidable in the direction of the arrow A-B with respect to a board (not shown). and are biased in the B direction by return springs 7, 8, 9, 10, 11, and 12, respectively. 13 is a recording/playback head, and 14 is an erasing head, both of which are placed on a head board 29, and are slidably guided in the direction of the arrow A-B, and are biased in the A direction by a spring 30. It is possible to move forward in the A direction until it comes into contact with the position regulating parts 31a and 31b. 17 is a capstan, and 24 is a pinch roller. The capstan 17 integrally connects the intermediate diameter portion 16 and the small diameter pulley portion 18 of the flywheel shown in FIG. 19 is a belt whose drive is transmitted from the small diameter pulley portion of the flywheel 18, 20 is a pulley driven by the belt 19, 21 is a take-up reel stand, 21a is the take-up reel shaft, 22 is a supply reel stand, 22a
23 is the supply reel shaft, and 23 is a take-up pulley, which has a pulley 23a coaxially driven by the belt 19 and a pulley 23b driven in pressure contact with the take-up reel stand. The take-up pulley 23 is rotatably supported on one end of the take-up arm 115, and the take-up arm 115 is rotatably supported on a fixed shaft 116, and is pressed counterclockwise by a spring 26 for pressure contact with the take-up reel stand 21. It is rotationally biased to Reference numeral 24 designates a pinch roller for winding up the magnetic tape, and is attached via a shaft 25b to a predetermined portion of a pinch roller arm 25 which is supported by a fixed shaft 25a. The pressure roller arm 25 also includes an arm portion 25c, an arm portion 25d that locks the protrusion 115a at the other end of the winding arm 115, and a pressure roller operating arm 27, which will be described later.
It has a pin portion 25e that engages with. Reference numeral 27 denotes a pinch roller operating arm arranged between the head board 29 and the operating members 6, 5, 4, and 3. The left end is rotatably supported on a fixed shaft 27a, and the right end is connected to the pin portion 25e of the pinch roller arm 25. It has an engaging oblong guide hole 27b and is integrally linked with the pinch roller arm 25. This pinch roller operating arm 27 is biased counterclockwise by a spring 28 (FIG. 3A) engaged between its lower bent portion 27c and the lower bent portion 4b of the regeneration operating member 4, and the pinch roller operating arm 27 is biased counterclockwise. The regulating portion 27c of the pinch roller operating arm 27 and the engaging portion 4b formed of the upper bent portion of the regeneration operating member 4 are brought into contact with each other by a spring 28, thereby positioning the pinch roller operating arm 27 when the pinch roller operating arm 27 is stopped. This engaging portion 4b is a keyhole-shaped through hole 29a of the head board 29.
(FIG. 2), the engaging portion 4b of the regeneration operation member comes into contact with the pressure roller operation arm 27 to restrict it, and at the same time comes into contact with one side 29b of the through hole 29a to restrict the position of the head board 29 in the forward direction. are doing. At this time, the force of the spring 30 shown in FIG. 1 which applies a forward force to the head board 29 is sufficient to advance the head board 29, but the restoring force of the return spring 10 of the regeneration operation member 4 is insufficient. Since this has a much larger return force, the head board 29 resists the biasing force of the spring 30 and biases the regeneration operation member 4 toward the B side. 32 is slidably guided by a lock plate in the CD direction with respect to the board, biased in the C direction by a spring 37, and positioned by a regulating portion (not shown) provided on the board. This lock plate 32 and the operating members 5, 4, 3, 2,
The relationship with 1 is as shown in Figure 4, and 32a, 32
b, 32c, and 32d are the engagement cam portion 5b of the recording operation member 5, the engagement cam portion 4c of the playback operation member 4, and
An engaging part that engages with the engaging cam part 3b of the rewind operating member 3 and the engaging cam part 2b of the fast forward operating member 2, and when each operating member is brought to the operating position, each of the engaging cam parts It is made lockable by engaging with the stepped part of.
Reference numeral 32e denotes an engaging portion that engages with the engaging portion 6b of the stop operation member 6, and is provided to release the lock by the lock plate 32 at the operation position of each of the aforementioned operation members.

In order to change from the stop state to the regeneration state in the arrangement as described above, it is sufficient to operate the regeneration button 4a, and at this time the regeneration operation member 4 moves forward against the return spring 10. The head board 29 has a spring 30
Since it is urged in the forward direction by , it moves forward until it comes into contact with the position regulating members 31a and 31b. At this time, since the moving step M of the regeneration operation member 4 is made longer than the moving step K of the head board 29,
One side 29b of the through hole 29a of the head board 29 and the engaging portion 4b of the regeneration operation member 4 are separated from each other (FIG. 6). The pinch roller operating arm 27 rotates together with the regeneration operating member 4 by a spring 28 until the pinch roller 24 comes into contact with the capstan 17, and from the position where the pinch roller 24 is pressed against the capstan 17, the spring 28 engages with the regeneration operating member 4. 28 is stretched, and this stretching force contributes to the pressing force of the pressure roller 24 to the capstan 17.
By operating this regeneration operation member 4, its tip bent portion 4d pushes the inclined portion 33a of the switch plate 33 and slides the switch plate 33 in the direction c, and at this time, although not shown, the motor switch or amplifier switch, etc. is turned on. Then, the motor is started, the capstan 17 rotates at a constant speed, and together with the pinch roller 24, the magnetic tape is wound up. Also pinch roller arm 2
The position of the take-up pulley 23 whose position had been restricted by the arm 25d of No.
is rotated counterclockwise. At this time, the rotational force transmitted to the large diameter side 23a of the take-up pulley 23 is transmitted to the take-up reel stand 21 via the coaxial 23b, and the pinch roller 24 and capstan 17 can take up the magnetic tape. At this time, the head board 29 comes into contact with the position regulating parts 31a and 31b and is brought to a predetermined position, so that the mounted recording/reproducing head 13 can reproduce the signal recorded on the magnetic tape. . When the playback button 4a is operated, the sloped portion 4c of the playback operation member 4 engages with the locking plate 32.
The lock plate 32 is returned to the C direction by the spring 37 when the operation is pushed to the farthest end, and as a result, the operating member 4 is moved from its locking portion. Lock board 3 with 4e
2 is locked. This reproduction state is shown in FIG.

To perform the review operation, it is sufficient to operate the rewind button 3a in the playback state shown in Fig. 6. When the rewind button 3a is operated, the rewind operation member 3 resists the return spring 9 (Fig. 1). move forward. At this time, the inclined part 3c of the rewinding operation member 3 pushes the engaging part 40a (FIG. 7) of the relay plate 40,
slide in the direction. At this time, the stepped portion 40b of the plate 40 pushes the inclined portion 29c of the head substrate 29 and causes it to slide in the direction B, causing the heads 13 and 14 to move back slightly, but their contact with the magnetic tape is maintained. Furthermore, when the relay plate 40 slides in the C direction, its end surface 40c pushes the inclined portion 27c of the pinch roller operating arm 27 to rotate it clockwise against the spring 28, and at this time, the pinch roller arm 25 is rotated counterclockwise. Rotate the pinch roller 24 to separate it from the capstan 17 as shown in FIG.

When the relay plate 40 (FIG. 7) slides in the C direction, its end surface 40c touches the end surface 41a of the rotating arm 41.
is pressed to rotate the arm 41 clockwise about the support shaft 43 against the spring 42 (FIG. 8). At this time, the lower bent portion 41b of the rotary arm 41 presses the lower bent portion 44b of another rotary arm 44 and rotates the arm counterclockwise with respect to the support shaft 25a, so that the rotary arm 44 The protrusion 116 of the take-up arm 115 is pushed by the cam part 44a to rotate clockwise with respect to the fixed shaft 116 against the spring 26, thereby separating the pulley 23b from the take-up reel stand 21.

During the operation of the rewinding operation member 3, the cut and raised portion 3d of the operation member 3 engages with the elastic tongue piece 4 of the rotating arm 45.
5a is rotated counterclockwise with respect to the support shaft 43 and pressed until it abuts on a stopper (not shown), and in this state, the rewinding gear is rotatably pivoted on the shaft 45b on the rotation arm 45. 46 supply reel stand 2
The supply reel carrier 22b is connected coaxially with the supply reel carrier 22b. Also, at this time, the arm 41 is rotated clockwise by the relay plate 40 (Fig. 5).
This pulls the spring 47 whose one end is locked to the lower bent portion 41b of the rotating arm 41. The other end of the spring 47 is locked to the other end 48b of another arm 48, one end of which is fitted to the support shaft 45b of the rotating arm 45.
8 rotates clockwise, and the support shaft 48 of the arm 48
A fast-forwarding idler 49 coaxially and loosely fitted to a is press-fitted to the intermediate diameter portion 16 of the flywheel, and the rotational force of the flywheel is transmitted to the idler 49.
A fast-forward gear 50 is coaxially disposed on the support shaft 48a with respect to the idler 49 via a slip mechanism, and transmits the transmitted rotational force to the fast-forward gear 50 and the rewind gear 4.
6 to the supply reel gear 22a, and is rewound in the reproducing state. Engagement portion 32c of locking plate 32 of inclined portion 3b (FIG. 1) of rewinding operation member 3
(Fig. 4) and the locking amount F of the engaging portion 32b of the locking plate 32 against the inclined portion 4c of the regeneration operation member 4 that has already operated are F.
>G, and the inclined portion 4c of the rewinding operation member 4
Even if the regeneration operation member 4 passes through the engaging portion 32c of the locking plate 32, the engagement of the regeneration operation member 4 with the locking plate 32 is not released, and the locking plate 32 remains in the state of sliding in the C direction and remains locked. , and the rewind operation member 3 is also not engaged.

Next, if you want to simply rewind, just operate the rewind button 3a in the stopped state as shown in Figure 1, and when you operate the rewind button 3a, the rewind will start as shown in Figure 9 in the same way as described above. The return operation works.
However, in this case, the head board 29 does not move from the stopped state shown in FIG. 1, so the heads 13 and 14 remain separated from the magnetic tape. At this time, the locking plate 32 is slid in the direction D against the spring 37 by the inclined portion 3b of the rewinding operation member 3, and when the operation is pushed to the deepest position, the locking plate 32 is moved in the direction C by the restoring force of the spring 37. Return and lock.

Next, the automatic stop mechanism in the present invention will be described. FIG. 10 is a plan view taken out of the drive component from FIG. 3. In FIG. 10, the small diameter pulley 18 of the flywheel is connected to the pulley 2 via the belt 19.
Rotation is constantly transmitted to 0. A gear 92 shown in FIG. 11 is disposed coaxially with the pulley 20.
is rotated at a reduced speed via a reduction gear 103 shown in FIG. As shown in FIG. 11, this gear 92 includes a bearing boss 91 having an engaging cam portion 91a;
Heart-shaped grooved cams 91b are integrally connected. The shaft 21 in FIG. 11 is attached to the take-up reel shaft 21a in FIG. 10.
b are connected coaxially and integrally, and a detection member 94 is disposed on the shaft 21b, which rotates via a well-known friction mechanism in accordance with rotation of the reel shaft. The rotating arm 94 integrally has a Y-shaped groove 94a and an extension arm 94c. A shaft 107 is arranged at an intermediate position between the gear 92 and the shaft 21b, and the shaft 107 has a rotatable and slidable hole 93c.
A rotating member 93 having a diameter is disposed. This rotating member 93 has a projecting pin portion 93a that engages with the grooved cam 91b at one end, and a projecting pin portion 93b that engages with the Y-shaped groove 94a at the other end. A release lever 95 associated with the engaging portion 32f of the locking plate 32 is connected to a shaft 104 shown in FIG.
is rotatably arranged and biased counterclockwise by a spring 100 until it abuts against the stopper 99. A shaft 96 is provided at the other end of the release lever 95, and a rotatable engagement lever 97 is disposed on the shaft 96. Further, with the shaft 104 being coaxial, one end of the torsion spring 98 is engaged with the release lever 95 and the other end is engaged with the locking portion 97c of the engagement lever 97.
7 in the clockwise direction, the protruding pin portion 97b of the engagement lever 97 is biased until it comes into contact with the curved portion 93d concentric with the shaft 92 of the rotating member 93. Further, the curved portion 93 where the protruding pin portion 97b of the engagement lever 97 comes into contact with the shaft 107 of the rotating member 93
On the opposite side of d, a torsion spring 108 has a much larger spring biasing force than the torsion spring 98.
However, the other end arm is attached to the stopper 11 with the fixed shaft 117 as the pivot.
It is placed in contact with 8.

This engagement lever 97 has a cam portion 91 of the gear 92.
An engaging portion 97a that can be locked oppositely is disposed on the end face 94 of the extension arm 94c of the detection member 94.
d is arranged to face the engagement lever 97b. Also, in FIG. 25, the pulley 20 has a gear 2 on the same axis.
0a are integrally connected to each other, forming a reduction train with gear 103, integrated small diameter gear 103a, and gear 92 in this order. The gear 103 is made coaxially movable by integrating a shaft 104 with the gear 103, and a spring 105 and a stopper 106 are arranged to bias the gear 103 in the direction of the small diameter gear 103a (towards the left in the drawing). It's biased. Shaft 104
are in contact with the malfunction prevention member 85, and as shown in FIG.
The position of the shaft 104 is regulated at three locations, and the convex portion 85c and the convex portion 85e are substantially on the same plane.

The switch operation member 33 is superimposed on the lower side of the malfunction prevention member 85 in FIG. 24, the control member 34 in FIG. 24A is superposed on the lower side, and the
The review/queue member 35 of Figure B is polymerized. The lower bent portion 33e of the switch operating member 33 and the lower bent portion 34f of the control member 34 are laterally juxtaposed, and one end of the spring 86 is locked there. Since the spring 86 has a fixed shaft 87 as its supporting axis and the other end is locked by a stopper 88, both the switch operation member 33 and the control member 34 are biased in the direction D by the spring 86. The distal end engaging portion 35d of the review/queue member 35 contacts the distal end bent portion 34h of the control member 34 and moves together in the return direction by the spring 86. Further, a spring 89 is stretched between the spring latching portion 34g of the control member 34 and the spring latching portion 85c of the malfunction prevention member 85.
The engaging portion 85b of No. 5 is biased until it comes into contact with the locking portion 34d of the control member 34 of FIG. 24B. Therefore, the control member 34 and the malfunction prevention member 85
act together unless an external force less than the tension of the spring 85 is applied.

In the above configuration, first, the manner in which the regeneration state is automatically stopped will be described.The regeneration operation member 3a is operated and locked at the operation position by the locking plate 32. At this time, the distal end 4d of the regeneration operating member 3a engages the engaging portion 33a of the switch operating member 33 and the engaging portion 34 of the operating member 34.
a. Operate the review/queue member 35a and press the switch operating member 33 against the spring 86;
Move the control member 34 and review/queue member 35 to the left. Of course, the malfunction prevention member 85 also moves together with the operating member 34 due to the biasing force of the spring 89. At this time, the movement of the switch operating member 33 turns on the motor switch (not shown) and starts tape running. Due to the movement of the malfunction prevention member 85, the tip of the shaft 104 in FIG.
Move the gear 10 from the position c to the position of the recess 85d.
The small diameter portion 103a of No. 3 can engage with the gear 92, and the rotational force transmitted to the pulley 20 is transferred to the gear No. 1.
03, small diameter gear 103a, and gear 92. Of course, when the shaft 104 is stopped, the tip of the shaft 104 is at the position of the convex portion 85c, and the small diameter gear 10 of the gear 103
3a does not mesh with gear 92.

As the rotation is transmitted to the gear 92, the grooved cam 91b also rotates, causing the rotating member 93 to reciprocate.
On the other hand, the reel shaft 21a (first
0), the coaxial detection member 94 is given a rotational force in the rotational direction by frictional force, but the rotational force is regulated by the Y-shaped groove 94a, resulting in reciprocating rotation. When the rotation of the reel shaft 21a stops here, the rotational force is not transmitted to the detection member 94, and the forward rotation of the rotation member 93 causes the tip pin protrusion of the rotation member 93 to 93b performs center positioning at the tip of the Y-shaped groove 94a, and comes into contact with the engagement tab 94b in the backward rotation. As the backward rotation further progresses, the entire rotating member 93 moves counterclockwise against the spring 103 using the engagement protrusion 94b as a fulcrum. At this time, since the projecting pin portion 97b of the engagement lever 97 follows the concentrically curved portion 93d of the rotating member 93, the engagement lever 97 itself rotates clockwise. In this state, the engaging portion 97a is connected to the gear 92.
is brought to a position where it can be engaged with the engagement cam portion 91a of the lever, and the release lever 95 is rotated counterclockwise about the shaft 104 by the rotational force of the gear 92, and one end 98a of the release lever 95 is locked. Engagement portion 32 of plate 32
Push f away and unlock the regeneration operation member 3a. During this process, as the release lever 95 rotates, the protruding pin portion 97b of the engagement lever 97 comes into contact with the tip end 94d of the extension arm 94c of the detection member 94, and as the rotation progresses further, the Y-shape of the detection member 94 The engagement with the projecting pin portion 93b of the rotating member 93 that is in contact with the engagement protrusion 94b of the groove 94a is disengaged. However, the engaging portion 97a of the engaging lever 97 and the engaging cam portion 9 of the gear 92
1a remains engaged, the release lever 95 continues to rotate, pushing away the locking plate 32 and unlocking the regeneration operation member 3a.

Next, when the rewinding operation is performed in the playback state, the rewinding operation is performed by operating the rewinding operation member 3a as described above, and the end engaging portion 3 of the rewinding operation member 3a
f is the opposing engaging portion 35b of the review member 35;
, and moves the review member 35 further to the left from the operated position in the playback state. Although not shown in the drawings, during this movement process, the lock of the recording operation member is released during recording. Review member 35
As the operation member 34 moves, the malfunction prevention member 85 also moves together with the spring 89. At this time, in the regenerated state, the tip of the shaft 104 of the gear 103 shown in FIG.
The small diameter gear 103a of No. 03 is disengaged from the gear 92, the rotation of the gear 92 is stopped, the transmission from the gear 92 onward is interrupted, and the automatic stop mechanism is prevented from operating. Since the arrangement is such that the rewind operation is performed after reaching this state, even if the tape stops running during the operation, or even if the tape reaches the end, the operation member will not be released due to automatic stop due to malfunction. Not done.

Regarding the rewinding operation and the fast forwarding operation, the operation after the tape running stop is detected is the same as the operation after the playback operation.

As described above in the embodiments, the present invention applies the rotational force of the drive gear driven by the rotating body unrelated to tape running after the detection member friction-driven by the rotating body related to tape running detects that the tape running has stopped. During the moving process of operating the release lever to release the lock plate, the tape running detection state of the detection member is released before the lock plate is released, so there is no malfunction or failure in the automatic stop mechanism, and the user can easily This provides a convenient cassette tape recorder that is easy to use and suitable for people.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the embodiment according to the present invention in a stopped state, FIG. 2 is a plan view of the head board, and FIG.
3A is a partial plan view of FIG. 3, FIG. 4 is a cross-sectional side view taken along line - in FIG. 1, and FIG. 5 is a partial plan view of FIG.
A plan view of the unwinding system located below each part of the figure, Fig. 6 is a plan view of the playback state, Fig. 7 is a cross-sectional side view along the line of Fig. 6, and Fig. 8 is a part of the review state. Fig. 9 is a plan view of the unwinding state, Fig. 10 is a partial plan view of the drive system, Fig. 11 is a plan view of the main part located above Fig. 10, and Fig. 12 is a plan view of the auto stop. 13 is a plan view of the area around the release lever.
Fig. 2 is a plan view of the area around the auto-stop control plate located above, Fig. 14 is a plan view of the control member, Fig. 15 is a plan view of the review/queue member,
FIG. 16 is a side view of the auto-stop detection section seen from the right side of FIG. 10. 2, 3, 4, 5...operating member, 32...locking plate, 21...take-up reel stand, 17...capstan, 94...sensing member, 92...gear, 93...
Rotating member, 108... Torsion spring, 103... Gear, 20... Pulley, 97... Engagement lever, 98
...Torsion spring, 95...Release lever, 100...
...Spring, 85...Malfunction prevention member.

Claims (1)

[Claims] 1. A first rotating body 17 that rotates regardless of tape running, and a second rotating body 21 that is related to tape running.
, a detection member 94 having a Y-shaped groove, frictionally driven by the second rotary body and biased in the rotational direction of the second rotary body, and a detection member 94 having a Y-shaped groove and an eccentric groove coaxially driven by the first rotary body. A drive gear 92 that integrally includes a cam and an engaging cam portion, and a long hole that can rotate and slide about a shaft provided between the drive gear and the first rotary body as a fulcrum, and has a long hole at one end. a rotating member 93 having a protruding pin part that engages with the Y-shaped groove of the detection member and a protruding pin part that engages with the groove cam of the drive gear at the other end;
a first spring 108 that biases the rotating member in one direction of the elongated hole; and deceleration means 19 and 2 arranged between the first rotary body 17 and the drive gear 92.
0, 103, each operating member 2, 3, 4, 5 for controlling tape running, and the operating position of the operating member is always set so that it can engage with the locking plate 32 and the engagement cam portion of the drive gear 92. is the drive gear 92 due to the biasing force of the first spring 108 of the rotating member 93.
The release arm 9 is in a state of standby for engagement with the engagement cam portion of the
7, and the first spring 101 which applies a biasing force to the release arm in the direction of contact with the rotating member 93.
A second spring 9 with a smaller spring force than
8, and a release lever 9 having one end pivotally supporting the release arm 97 and the other end arranged so as to be able to come into contact with the locking plate 32.
5, a third spring 100 that urges the release lever to standby in contact with the locking plate, and at least a regeneration operation from a state in which a portion of the deceleration means 19, 20, 103 is not connected when stopped. a control member 85 capable of combinably controlling the deceleration means according to the
When tape running is stopped, the grooved cam of the driving gear 92 rotates the rotary member 93 so that the protrusion pin of the rotary member is brought into contact with the central protrusion of the Y-shaped groove of the detection member 94. By abutting and engaging, the fulcrum of the rotating member moves from the central elongated hole to the Y-groove central protrusion, thereby causing the release arm 97 to move to the engagement cam portion of the drive gear 92 in a standby state. When the restriction is released, the engagement cam portion and the release arm engage, and the release lever 95 moves together with the release arm 97 due to the rotational force of the drive gear, and this movement causes the release arm to move. The lock plate 32 is moved to release the locks of each of the operating members 2, 3, 4, and 5 at each operating position, and the control member 85 is returned to the position from the first rotating body 17 to the drive gear 92. deceleration means 1
9, 20, and 103 are disengaged and the respective operating members are unlocked at each operating position by the movement of the locking plate 32. Contact engagement portion 94
d and 97b, the detecting member 94 is forcibly rotated so as to release the fulcrum relationship between the detecting member 94 and the rotating member 93.