JPH0217852B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing device.
One of the basic conditions for full auto stop is that the drive cam for the automatic stop mechanism must be constantly rotating at low speed during each mode (PLAY, REC, FF, REW). On the other hand, one of the basic conditions for PLAY and REW is that the take-up reel stand must be rotated only during the mode. In other words, PLAY,
If the auto-stop is performed only during REC, it is possible to obtain the drive power for the automatic stop mechanism from the take-up idler gear, but it cannot be used as the drive source during FF or REW.

The present invention provides a cam gear that meshes with the idler gear, and by appropriately selecting the position of the fulcrum of the idler lever, that is, the rotation axis of the cam gear, when the idler lever is rotated in one direction (PLAY, REC direction) about the fulcrum, the idler gear is moved to the capstan gear. It engages with the take-up friction gear to transmit take-up force, and also controls the idler lever on the other side (FF,
When the idler gear and take-up friction gear are rotated in the REW and STOP directions), the engagement between the idler gear and take-up friction gear is disengaged, and the take-up force is cut off.However, even if the capstan gear and idler gear are moved slightly in the tangential direction, the distance between their centers does not change significantly. The rotation of the capstan gear is transmitted to the cam gear through the idler gear. Therefore, the take-up force and the driving force for the automatic stop mechanism can be extracted through the idler gear in a limited space.

The present invention will be described below based on drawings showing an example of implementation. First, the overall configuration will be explained based on FIGS. 1 and 2. Note that FIG. 1 is a view from the front side, and FIG. 2 is a view from the back side. Reference numeral 1 denotes a board, and an upper board 3 is attached to the board 1 by screws 2 with an appropriate gap, and a board 6 is slidable between both boards 1 and 3 in the direction of arrow A←→B in the drawing. Book operating levers 4 to 9 are provided. Each operating lever 4
The tip operation buttons 4a to 9a protrude from between the substrates 1 and 3. The pause operation lever 9 has a push-and-push lock mechanism (not shown), and includes a STOP operation lever 4, a REC operation lever 5,
REW control lever 6, FF control lever 7 and PLAY
The operating lever 8 is associated with a main locking rod 10 and is selectively lockable. 13 is a head board provided on the upper board 3, and the head board 13 can be slid in the direction of the arrow A←→B in the drawing by means of a guide pin 12 inserted into a long hole 11 formed in the upper board 3; This head board 13 is prevented from lifting up by a head board holder 14, and a certain gap is provided between the upper board 3 and the head board 13, and the main lock rod 10 and sub rod 15 are inserted into this gap. It is arranged to be slidable in the direction of arrow C←→D in the drawing. The head board 13 is moved by the spring 16 with a light force as indicated by the arrow B in the drawing.
biased in the direction. A main lever 17 is rotatably arranged around a pin 18 provided near a corner of the board 1, and the main lever 17 is rotated by the rotation of a main gear 19 attached to the back surface of the board 1. rotates counterclockwise via a pin 20 penetrating the substrate 1 and the upper substrate 3;
The pinch roller arm 21 and the head board 13 can be pushed in the direction of arrow A in the drawing via the spring 22 to bring it into the PLAY state. 23 is a take-up reel stand, 2
4 is a supply reel stand. 25 and 26 are the substrate 1
A flywheel and a capstan are attached to the back side of the machine and can be rotated clockwise by a motor 27. The flywheel 25 and the motor 27 are shown by two-dot chain lines in FIG. 2, but this is because they are mounted above in FIG. 2, and the rotation of the motor 27 is
5 to Capstan 26 and Capstan 2
6 is rotated counterclockwise in FIG. 2, and this capstan 26 is configured to serve as a driving source for all operations.

Next, the structure and operation of the main mechanism will be explained with reference to FIGS. 3 to 5. Figures 3 to 5 are views from the back side, with Figure 3 being in the STOP state and Figure 4 being in the STOP state.
FF state, Figure 5 shows REW state, first
Switching from the STOP state to the FF state will be explained. When the FF operation button 7a is pressed, the sub gear 28 meshes with the capstan gear 29 and rotates, and the sub lever 30 is moved clockwise in FIGS. 3 to 5 by a cam 28a formed as a so-called intermittent gear. Rotate to . As a result, one end 30a of the sub-lever 30
Hold the tip pin 31a of No. 1 in the direction of arrow C in the drawing. A fast-forwarding lever 32 is rotatably attached to a fulcrum 31b on the fast-forwarding arm 31, and a fast-forwarding gear 3 that meshes with this fast-forwarding lever 32
3 and rewinding gear 34 are respectively connected to shafts 33a and 34a.
It is supported by Also, the fast forward lever 3
2 is always urged clockwise in FIGS. 3 to 5 by the spring 35, but because the claw 32a of the fast-forward lever 32 engages with the claw 36a at the tip of the hook 36, it cannot rotate beyond a certain level. It is configured not to. Therefore, the fast-forwarding gear 33 moves in the direction of arrow C in the drawing, meshes with the capstan gear 29 and the take-up reel stand gear 37, and the capstan gear 29
The rotation is transmitted, and the take-up reel stand 23 rotates in the counterclockwise direction in FIG. 4, making it possible to put the tape in the FF state. Next, to explain the switching from the FF state to the STOP state, when the FF operation lever 7 is released from the locked state, the sub gear 28
is rotated in the clockwise direction in FIG.
3 along the cam 28a surface to the position shown in FIG. Since the fast-forwarding arm 31 is rotated by the spring 38 in the clockwise direction in FIGS. 3 to 5, the fast-forwarding arm 31 also returns to the position shown in FIG.
and can be separated from the take-up reel stand gear 37. Next, switching from the STOP state to the REW state will be explained. When the REW operation button 6a is pushed in the direction of the arrow A in the drawing, the sub gear 28 engages with the capstan gear 29 and rotates, and the other end 30b of the sub lever 30 is pushed by the cam 28a, and the sub lever 30 is rotated as shown in FIGS. 3 to 5. direction, and one end 30a of the sub-lever 30 pushes the tip pin 31a of the fast-forwarding arm 31 in the direction of arrow C in the drawing. On the other hand, the bending protrusion 6b of the REW operation lever 6
The arm 36 of the hook 36 moves forward in the direction of arrow A in the drawing.
In order to press b, the claw 36a at the tip of the hook 36 deviates from the trajectory of the claw 32a of the fast-forwarding lever 32, which moves the fast-forwarding arm 31 counterclockwise in FIG. It rotates clockwise in FIG. 5 by the spring 35 and stops at the position where it contacts the stopper 31c of the fast-forwarding arm 31. This state is shown in FIG. 5, where the rotation of the capstan gear 29 is transmitted to the supply reel stand gear 39 via the fast forward gear 33 and the rewind gear 34, and the supply reel stand 24 rotates clockwise in FIG. can be put into REW state. Also, to explain the switching from the REW state to the STOP state, when the REW operation lever 6 is released from the locked state, the sub gear 2
8 rotates clockwise in FIGS. 3 to 5, the other end 30b of the sub-lever 30 slides down along the cam surface 28a to the position shown in FIG. 3. When the fast-forwarding arm 31 is rotated clockwise in FIG. 3 by the spring 38, the end 3 of the fast-forwarding lever 32
2b comes into contact with the protrusion 40 on the substrate 1. When the fast-forwarding arm 31 is further rotated by the spring 38, the claw 32a of the fast-forwarding lever 32 also moves to the claw 36a of the hook 36.
It returns to a position where it can be engaged with, and enters the STOP state (see Figure 3).

Next, a method of controlling the sub-gear 28 of the rapid-forwarding mechanism will be explained based on FIGS. 6 to 8. Figures 6 to 8 are viewed from the front side, and Figure 6 is for STOP.
FIG. 7 shows the FF state, and FIG. 8 shows the REW state. First, to explain the switching from the STOP state to the FF state, when the FF operating lever 7 is pushed in the direction of arrow A in the drawing, the sub-control lever 41 is rotated clockwise in FIG. 7 by the protrusion 7b on the FF operating lever 7. . On the other hand, sub gear 28
Since the spring 62 is in pressure contact with the upper protrusion 28b and applies a counterclockwise rotational force to the sub gear 28 in the STOP state, when the protrusion 28c on the sub gear 28 disengages from the pin 41a of the sub control lever 41. First tooth 28d of sub gear 28 and capstan gear 2
9 are engaged, the sub gear 28 rotates counterclockwise, and when the final tooth 28e of the sub gear 28 and the capstan gear 29 are disengaged, the sub gear 28
The protrusion 28f and the pin 41a of the sub control lever 41
The sub-gear 28 is engaged with the sub-gear 28, thereby preventing further rotation of the sub-gear 28 (see FIG. 7). This corresponds to FIG. Next, from the FF state
Switching to the STOP state will be explained. FF
When the operating lever 7 is released from the locked state, the protrusion 7c on the lever 7 returns in the direction of arrow B in the drawing, causing the protrusion 7c to come into contact with the pin 41b of the sub-control lever 41, and the return force causes the sub-gear 28 to move. The projection 28f and the pin 41a of the sub-control lever 41 are disengaged, resulting in the STOP state shown in FIG. 6. At this time, a protrusion 6c provided on the REW operating lever 6 is used to prevent the sub-control lever 41 from overrunning and coming off the protrusion 28c of the sub-gear 28. Switching from REW to STOP state is also done using the protrusion 6c and the protrusion 7c of the FF operation lever 7.
works. Next, to explain how to switch from the STOP state to the REW state, when the REW operating lever 6 is pushed in the direction of arrow A in the drawing and locked, the REW
The sub-control lever 41 is rotated counterclockwise in FIG. 8 by the protrusion 6d on the operating lever 6.
Protrusion 28c on sub gear 28 and sub control lever 4
When the first pin 41a is removed, the sub gear 28 rotates clockwise and stops in the state shown in FIG. This corresponds to FIG. Switching from the REW state to the STOP state is approximately the same as switching from the FF state to the STOP state. Furthermore, switching from the REW state to the FF state will be explained. As explained about switching from the REW state to the STOP state by the movement of the drive part of the fast-forward mechanism, the fast-forward arm 3
If 1 does not return to the STOP state completely, hook 36 will occur.
Since the pawl 36a of the fast-forwarding lever 32 and the pawl 32a of the fast-forwarding lever 32 do not return to the engagement position, it is not possible to switch to the FF state. In other words, no matter how quickly you operate the FF operation button 7a from the REW state, the sub gear 28
must rotate. In the present invention, in order to control the sub control lever 4, a protrusion 28f for FF, a protrusion 28g for REW, and a STOP are provided on the sub gear 28 for controlling the sub control lever 4.
A protrusion 28c for FF is provided, and a protrusion 28f for FF is provided.
Protrusion 2 for STOP between protrusion 28g for REW
8c, even if the FF←→REW operation is quickly switched, the switch is always performed via the STOP mode to the next mode, thereby ensuring the above-mentioned switching.

Next, the PLAY mechanism will be explained based on FIGS. 1, 2, and 9 to 13. Figures 1 and 9 are the STOP state seen from the front side, Figure 2 is the STOP state seen from the back side, and Figure 10 is the STOP state seen from the front side.
PLAY state, Figures 11 and 12 show the PLAY state seen from the back side, and Figure 13 shows switching to the PLAY state seen from the back side, first from the STOP state.
Switching to the PLAY state will be explained.
When the PLAY operation lever 8 is pushed in and locked, a so-called intermittent gear 19 with no teeth in the middle rotates, and the inner cam 1 formed on this main gear 19 rotates.
9a, the pin 20 of the main lever 17 is pushed in the direction of arrow A in the drawing, and the pinch roller 42 and head board 13 move forward in the direction of arrow A in the drawing via the spring 2 and come into contact with the tape, resulting in the state shown in FIG. . Next, the winding mechanism will be explained based on FIGS. 2 and 11. An idler lever 44, which is rotatably attached to the base plate 1 around a pin 43, is always urged by a spring 45 to rotate clockwise in the drawing. Also, the exchange lever 47, which is rotatably attached around the pin 46 of the board 1, is connected to the end 44a of the idler lever 44 by the pin 47a.
The arm 47b of the exchange lever 47 hits the pin 17a of the main lever 17, and its rotation is stopped. When the main lever 17 is rotated clockwise when viewed from the back side, the pin 17a moves in the direction of arrow C in the drawing, the exchange lever 47 becomes free as shown in FIG. Rotate until it hits pin 48. A cam gear 49 is pivotally supported on the pin 43 of the board 1, and this cam gear 49 is connected to an idler gear 50.
The idler gear 50 meshes with the small gear 29a of the capstan gear 29,
The cam gear 49 always rotates counterclockwise in the drawing due to the rotation of the capstan small gear 29a, providing driving force for an auto-stop mechanism (not shown). When the idler lever 44 rotates clockwise in the drawing, the idler gear 50 moves to the friction gear 51 attached to the take-up reel stand 23 by a friction mechanism.
The winding force is transmitted through the idler gear 50. Even in this case, the cam gear 49, which is the drive source of the auto-stop mechanism, continues to rotate. Next, the control method will be explained. STOP
To switch from the PLAY state to the PLAY state, push the PLAY operating lever 8 in the direction of arrow A in the drawing.
As shown in the figure, the protrusion 8b on the PLAY operating lever 8
The spring 55 rotates the main control lever 53 counterclockwise in FIG.
Remove a. Main gear 19 in stop mode is spring 5
4 always applies a clockwise rotational force when viewed from the back side, the first tooth 19d meshes with the capstan gear 29 and rotates clockwise in FIG. 12, and the final tooth 19f and the capstan gear 29
When the engagement with the main gear 19 is disengaged, the tip pin 53a comes into contact with the protrusion 19e of the main gear 19, and the rotation of the main gear 19 is stopped (see FIG. 12).
To switch from PLAY state to STOP state,
When the PLAY operating lever 8 is released from the locked state, the protrusion 8b of the PLAY operating lever 8 moves in the direction of arrow B in the drawing.
2, the main control lever 53 is rotated clockwise in FIG. Stop (see Figure 2). Regarding the PEC operation, the operations of the main lever 17 and the main control lever 53 are the same, so the explanation thereof will be omitted.

Next, the queue and review operations will be explained.
In the PLAY state shown in FIG. 12, when the FF operating lever 7 is pushed in, the main control lever 53 is rotated clockwise by the protrusion 7d against the spring 52, and the main gear 19 is rotated as explained in the PLAY→STOP section.
becomes the STOP state, the pinch roller and head move backward, and the idler gear 50 becomes the friction gear 51.
, the take-up reel stand 23 rotates at high speed by the fast-forwarding mechanism as explained in STOP→FF above,
Speed up the tape. At any given position,
When the FF operation lever 7 is returned, the main control lever 53 is rotated counterclockwise again by the force of the spring 52 and returns to the PLAY state.

Next, in the queue/review state, the recording/playback head 56 is moved slightly backward in the direction of arrow B in the figure compared to the PLAY state, and is brought into contact with the tape rotating at high speed with a light force. This will be explained based on FIGS. 1st
4 to 16 show the movements of the operating levers 4 to 9, the main lock rod 10, the subrod 15, the hook 57, and the head board 13 in the STOP state, PLAY state, and playback state. Drawing arrow A,
The operating levers 4 to 9, which are slidable in the direction B, are always urged in the direction indicated by the arrow B in the figure by a return spring (not shown). The main lock rod 10, which is slidable in the directions of arrows C and D in the drawing, is always biased in the direction of arrow C in the drawing by a spring 58 in order to maintain the operating levers 4 to 8 in the operating state. The sub-rod 15 is for controlling the hook 57 according to the operating state of each operating lever 4 to 8, and is always connected to one end of the spring 59 by the arrow D in the drawing.
biased in the direction. On the other hand, the hook 57 rotatably attached to the pin 60 on the upper substrate 3 is always biased clockwise by the spring 59 hooked on the protrusion 57a, but when the operating levers 5 to 8 are all in the stop position As shown in FIG. 14, the protrusion 57b on the hook 57 is pushed by the protrusion 15a on the subrod 15, and the side portion 13a of the head board 13 is pressed.
separated from Next, as shown in Figure 15
When the PLAT operating lever 8 is pushed in, the hook 57 is moved clockwise so that it is held in the forward position by the pin 10a on the main lock rod 10 and the pin 15b on the sub rod 15 is moved in the direction of arrow C in the drawing by the inclined surface 8c. The protrusion 57c comes into contact with the side surface 13b of the head substrate 13 that has moved forward in the direction of arrow A in the figure (PLAY state). Next, when the REW operation lever 6 is pushed in while in the PLAY state, the main lock rod 10 is pushed by the protrusion 6e and moves in the direction of arrow D in the drawing, but it is lower than the height of the protrusion 8d of the PLAY operation lever 8. PLAY to be
The operating lever 8 is not released (queued state).
Even if the REW control lever 6 is pushed in deeply, the main lock rod 10 remains on the protrusion 8d of the PLAY control lever 8.
Since the pin 10a is held down, the drawing arrow C
Since it does not move in the direction, when you stop pressing the REW operating lever 6, the REW operating lever 6 is not locked and returns to the stop position, returning to the original PLAY state. Naturally, the PLAY control lever 8 and the REW control lever 6 are locked at the same time when they are pushed in, and even if they are released, they remain in a queued state. Here, the head board 13
See the relationship between this and Fuku57. PLAY as mentioned above
(or REC), the main lever 17 is released and the head board 1
3 also tries to return in the direction of arrow B in the figure, but the protrusion 57c on the hook 57 hits the protrusion 1 of the head board 13.
3c and locks in a certain position. By bringing the recording/reproducing head 56 into contact with the tape at this position with a light force, a signal can be extracted from the tape running at high speed. Next, Kyu or
When the STOP operation lever 4 is pushed in from the PLAY state, the pin 10b on the main lock rod 10 is moved in the direction of arrow D in the drawing by the inclined surface 4b, and the lock is released, and the PLAY operation lever 8 and REW are released.
The operating lever 6 returns to the stop position. The subrod 15 is moved by the spring 59 in the direction of arrow D in the drawing. Since the protrusion 57b of the hook 57 is moved in the direction of arrow D in the drawing by the protrusion 15a on the sub-rod 15, the protrusion 13c of the head board 13 comes off and returns to the stop position, resulting in the STOP state. Since the review operation can be realized in the same manner as the queue operation, the explanation thereof will be omitted.

Next, the pause mechanism will be explained. When the pause operation lever 9 is pushed in from the PLAY state or the REC state (see FIG. 12), the pause lever 61 is rotated counterclockwise by the protrusion 9b as shown in FIG. In order to push the end 53b of the main control lever 53 clockwise, the main gear 19 is released, and the head board 13 and the pinch roller 42 move back in the direction of arrow B in the drawing. The head board 13 is attached by the hook 57 as shown in FIG.
Retraction of the tape is prevented at a position where it does not leave the tape.
Therefore, even if a pause operation is performed from the REC state, noise generated when the head leaves the tape can be prevented. When the pause operation lever 4 is pushed in again, the push-end push mechanism (not shown) is disengaged and returns to the stop direction, whereby the main control lever 53 is rotated counterclockwise by the spring 52, and the main gear 19 is rotated. , PLAY state or
Return to REC state.

The magnetic recording/reproducing apparatus of the present invention can be implemented as described above, and since the fulcrum of the idler lever provided with the idler gear and the fulcrum of the cam gear are common, take-up force is transmitted during PLAY and REC, and when FF, FF, During REW or STOP, the take-up force is cut off, and the rotation from the capstan is transmitted from the idler gear to the cam gear. Therefore, the take-up force and the driving force for the automatic stop mechanism can be taken out through the idler gear in a limited space.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention.
The figure is an overall plan view, Figure 2 is an overall bottom view, Figures 3~
Figure 5 is an explanatory diagram of the main parts in the STOP state, FF state, and REW state, seen from the back side, and Figures 6 to 8
The figure is an operation explanatory diagram showing how to control the sub-gear of the fast-forwarding mechanism. Figures 9 and 10 are operation explanatory diagrams of the PLAY mechanism. Figures 11 and 12 are operation explanations of the main parts in the PLAY state as seen from the back side. Figure, Figure 13 is
An explanatory diagram of the operation of the main parts when switching to the PLAY state as seen from the back side, Figs. 14 to 16 are explanatory diagrams of the operation of the operating lever section, and Fig. 17 is an explanatory diagram of the operation of the pause mechanism seen from the back side. . DESCRIPTION OF SYMBOLS 1... Board, 3... Upper board, 4-9... Operating lever, 4a-9a... Operating button, 10... Main lock rod, 13... Head board, 15... Sub rod, 1
7...Main lever, 19...Main gear, 19a...
Inner cam, 19b...cam, 19c...locking part, 19
d...first tooth, 19e...protrusion, 19f...final tooth,
21... Pinch roller arm, 23... Take-up reel stand, 24... Supply reel stand, 26... Capstan,
28...Sub gear, 28b, 28c, 28f, 28
g...Protrusion, 28d...First tooth, 28e...Final tooth,
29...Capstan gear, 30...Sub lever, 3
1...Fast-forward arm, 32...Fast-forward lever, 33...
Fast forward gear, 34... Rewind gear, 36... Hook,
37... Take-up reel stand gear, 39... Supply reel stand gear, 41... Sub control lever, 41a, 41b...
Pin, 42...Pinch roller, 44...Idler lever, 47...Replacement lever, 49...Cam gear, 50...
Idler gear, 51... Friction gear, 53...
Main control lever, 56...recording and playback head, 57
...Futsuku, 61...Pause lever.

Claims (1)

[Claims] 1. An idler lever equipped with an idler gear that transmits the rotation of the capstan that runs the tape at a constant speed to the rewind reel stand during playback and recording, but not to the take-up reel stand during fast forwarding, rewinding, and stopping. regenerating through rotation of the fulcrum and the idler gear that is always engaged with the capstan;
A magnetic recording and reproducing device characterized in that a fulcrum of a cam gear for driving an automatic stop mechanism during recording, fast forwarding and rewinding is shared.