JPS60175232A - Magnetic recording and reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention particularly relates to a compact magnetic recording/reproducing device.

Conventional configurations and their problems Conventionally, methods for automatically transitioning from a playback or recording state to a stop state include: (1) a method of detecting the stoppage of rotation of the take-up reel or supply reel and simply stopping the rotation of the motor; , (2) A method of obtaining a stopped state using the tape tension of a cassette tape magazine, or (
3) A method is known in which a mechanism dedicated to automatic stop is provided to detect stoppage of the take-up reel or supply reel and automatically obtain the stop state. There is a problem of deformation of the rubber member of the pinch roller due to pressure contact with the capstan shaft, and in method (2), the slip force on the take-up reel side must be increased in order to obtain sufficient tape tension. However, there is a problem in that the current consumption of the motor increases during reproduction or recording, and the method (3) has a problem in that the mechanism configuration becomes complicated.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a magnetic recording/reproducing apparatus which solves the problems of the conventional apparatus and which has a simple structure and can be miniaturized.

Structure of the Invention In order to achieve the above object, the magnetic recording and reproducing device of the present invention includes a capstan gear provided on a capstan shaft;
A large gear that is secured to the capstan gear and includes a cam portion, a friction gear that slips and rotates coaxially with the large gear, a gear portion that engages with the friction gear, and a fast forward/rewind gear that engages with the auto-stop gear. a second auto-stop lever that engages with the cam portion of the large gear and is rotatably held by the first auto-stop lever; and an auto-stop yoke that slips and rotates with the auto-stop gear. and an auto-stop sensor that engages with the auto-stop yoke and also engages with the second auto-stop lever, and when the rotation of the take-up reel stops, the auto-stop sensor and the first auto-stop are activated. The apparatus is characterized in that it is configured to automatically shift from the reverse playback or recording state to the stop state by operating the lever and the second auto-stop lever.

Description of examples Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 is a diagram showing a first state in which the cassette tape magazine 1 can be attached or detached. FIG. 2 is a diagram showing a second state in which the cassette tape magazine 1 is installed. FIG. 3 is a diagram showing the reproduction state.

Now, in Fig. 1.5.11, the main board 2 slidably holds the head board 3, and the play stop (hereinafter p
A first PS board shaft 2a that fastens the board 17 (referred to as s), a first head board guide shaft 2b that similarly slidably holds the head board 3, and a lock implanted in the head board 3. A head lock lever shaft 2C that rotatably holds the head lock lever 7 in engagement with the pin 3a, and a lock release pin 81 that is in constant contact with the hesodoroso lever 7! A push-up lever shaft 2d rotatably holds a push-up lever 8 in which a push-up lever 8 is installed and is engaged with the head board 3, and a head shift shaft (hereinafter referred to as H8) that connects and supports the PS board 1. ) H that holds the lever 6 rotatably
8 rotation shaft 2e, a first As rotation lever shaft 2f that fastens and supports the decorative board 18 and rotatably holds the first auto-stop (hereinafter referred to as AS) lever 9, and the decorative board 18.
A decorative board support 2g that fastens and supports the subboard 19, a subboard support 2h that fastens and holds the subboard 19, and a play (hereinafter referred to as P).
a P board guide shaft 21 that slidably holds the board 13;
2 first interlocking lever shafts that slidably hold the interlocking lever 12 and fasten and support the PS support board 20; A pS support shaft 21 that fastens and supports the PS support board 2o to the interlocking lever shaft 2 of No. 2;
An As substrate support 2m that fastens and supports the S substrate 14 and a reference shaft 16 that guides and holds the cassette tape magazine 1 are implanted. Further, the main board 2 is provided with a capstan bearing that rotatably holds the capstan shaft 16. The head substrate 3 has a second head substrate guide shaft 3 that slidably holds the head substrate 3.
C, and H8, which is constantly engaged with the U-shaped portion of the HS lever 6.
The engaging shaft 4b is installed and the magnetic head 26 is attached to the head screw 26.
& , 26b, and a pinch arm shaft 42L that rotatably holds the pinch arm 6 that rotatably holds the pinch roller 7 and a limiter shaft 4C that restricts the rotation range of the pinch arm 6 are installed. a head rotation shaft 3 that rotatably holds the head rotation plate 4 on the pinch arm shaft 4a;
b is planted.

Next, in FIGS. 9 to 13, the sub-board 19 has an FR lock lever shaft 192L that rotatably holds the lock lever 22 (hereinafter referred to as FR) and the switch lever 23, and a forward (hereinafter referred to as F) lock lever shaft 192L. An F lever shaft 19b that rotatably holds the lever 24, a canine gear shaft 21a that rotatably holds the large gear 33, a fast forward (hereinafter referred to as FF) control shaft 21b that constantly engages with the F lever 24, and the P board. 13 and a large gear retaining shaft 21 that is always in abutting and engaging state.
A large gear rotation shaft 190 rotatably holds the large gear base plate 21 on which the number 0 is implanted and also rotatably holds the intermediate gear 35, and the reel shaft 27 and the take-up reel 28 are rotatably and slidably supported. A reel bearing 19d is implanted to hold the reel shaft 27 and the supply reel 29 in a rotatable and slidable manner. The PS support board 20 also has an interlocking pin 12 implanted in the interlocking lever 12.
A rotation shaft 202L is implanted to rotatably hold the PS lever 25, which is always in abutting engagement with the PS lever 202L. 14-1 above
In Fig. 6, the PS board 17 has a P shaft 38 which slidably holds a P shaft 38 which fastens and holds the P lever 37 with a screw 37&.
Shaft guide 42 and stop (hereinafter referred to as S) lever 40
An S-axis guide 43 is installed to slidably hold an S-axis 41 installed in the shaft. Here, screw 3 is attached to the S shaft 41.
The S board 39 is fastened at 9a, and the S lever spring 39b is interposed therebetween. Similarly, a P lever spring 37b is interposed in the P lever 37, and its inclined surface is engaged with the HS lever 6, and the conical portion of the P shaft 38 is connected to the PS lever 25 and the S lever 4°. The blade-shaped portion is also in an engaging relationship with the psS lever 6.

Further, a standby spring 44 having a cassette sensor bin 45 embedded therein is fastened to the PS board 17 with screws 44b.

Now, in the first state, as shown in FIG. 19, the control cam part 44a of the standby spring 44 abuts and engages with the long hole part 3d of the head board 3, and the cassette tape magazine 1 is attached to the serpin 45. When the standby spring 44 comes into contact with the control cam portion 44a, the elongated hole portion 3 of the head substrate 3 is bent.
d is released and the head substrate 3 slides,
The second state is reached. Here, the head substrate 3 is constantly biased by a head substrate spring 3e. In the second state, the drive train is driven by a capstan gear 47 provided on the capstan shaft 16, as will be explained in FIGS. 7 and 9.
and the large gear 33 are always in an engaged state, and this large gear 3
3 and intermediate gear 35 are also constantly engaged. Here, the friction gear 34, which rotates concentrically with the large gear 33, is configured to slip drive between the large gear 33 and the large gear 33. Specifically, the large gear 33 has a gear portion 33& and a yoke portion (magnetic The friction gear 34 is made of a plastic magnetic member, and the friction gear 34 is attached to the yoke part 33b by adsorption to the friction gear 33b. ing.

However, in the second state, there is no locking of the gears other than the locking of the drive train described above, and even if the capstan 15 rotates, the tape (not shown) in the cassette tape magazine 1
By pushing in the P lever 37 as shown in FIG. 15 while it is stopped, the lock portion 38a of the P shaft 38 and the PS lock lever 26 are locked and held in FIG. 14. In conjunction with this operation, the HS lever 5 comes into contact with the inclined surface of the P (-37), and the HS lever (-5) is rotated and held. Also, in conjunction with the rotation of the HS lever 5, the HS lever 5
The head rotating plate 4 is held rotated about the head rotating shaft 3b by the H3 engaging shaft 4b which is always engaged in the U-shape of The pinch roller 7 and the capstan shaft come into contact with each other, and an appropriate pinch pressure is generated by the pinch spring 62L. At the same time, the P interlocking bottle 5a implanted in the HS Leno (-6) and the P board 13 come into contact with each other.
The P board 13 slides, and the large gear board 21 is rotationally held by the abutting engagement between the cam portion 132L of the P board 13 and the large gear retaining shaft 2IC of the large gear board 21. By maintaining this rotation, the friction gear 34 and the gear portion 282L of the take-up reel 28 are brought into a locked state, and a regeneration state is obtained by turning on the switch (not shown) of the motor 46.

Moreover, since the lock pin 32L of the head board 3 and the hendo lock lever 7 engage with each other by shifting from the first state to the second state (see FIG. 6), the head board 3
It is not possible to return to the first state unless the engagement is released. Moreover, this engagement ensures a sufficient pinch pressure in the above-mentioned playback state, and biases the head substrate 3. (The spring 3e also generates pinch pressure. The transition from the above-mentioned playback state to the stop state will now be explained.
When the board 39f is operated in the direction of the arrow in FIG. 16, the blade portion of the S lever 4° comes into contact with the PS lock lever 26, thereby rotating the PS lock lever 25. As a result, the locked state of the lock portion 38a of the P shaft 38 and the PS lock lever 25 is released, and the P lever 37 is released.
returns, and similarly the P substrate 13. By returning the large gear base plate 21 to its original state, the engagement between the friction gear 34 and the gear portion 28a of the take-up reel 28 is released. Fortunately, the head rotating plate 4 has also returned, and the second
The state will be as follows. Of course, the switch (not shown) for the motor 46 is also turned off.

The fast forward state is obtained by operating the reel cap 32 of the take-up reel 28 in the direction of the arrow in FIG. In Fig. 9.10.11, the lock portion of the reel shaft 27 and the FR lock lever 22 are engaged and held, and at this time, the large gear board 21 is also rotated by the main engagement by the conical portion of the reel shaft 27. move. At this time, the FR gear 3o provided on the take-up reel 28 and the large gear 33 are engaged, resulting in a fast-forwarding state. Here, the gear portion 28& of the take-up reel 28 and the friction gear 34 have a configuration in which the gears 28& and the friction gear 34 are engaged with each other because the heights of the respective gears are different as shown in FIG.
The rotation of the switch lever 230 causes the motor 46 to
The switch (not shown) is also turned on and rotates.

Next, to explain the transition from the above-mentioned fast forwarding state to the stopped state, when the S board 39 is operated in the direction of the arrow in FIG. and PS lock lever 26
rotates. However, in FIG. 11, the PS lock lever 25 and the interlocking lever 12 are
14, the interlocking lever 12 slides as the PS lock 25 rotates. In addition, the interlocking lever 12 and the FR lock lever
22 is also in a state of constant contact and engagement as shown in FIG.
22 is rotated. This rotational movement releases the lock portion of the reel shaft 27 and the FR lock lever 22 from the locked state.

At this time, the switch lever 23 and the F lever also return, and the large gear board 21 also returns in the same manner, resulting in a stopped state and the aforementioned second state.

Of course, the switch (not shown) of the motor 46 is also turned off.
has been done.

Now, the fast return state can be obtained by operating the reel cap 32 of the supply reel 29 in the direction of the arrow in FIG. In Figure 9.10.11, the reel shaft 2
When the lock portion 7 and the FR lock lever 22 are held together, the switch lever 23 and the F lever 24 are rotated by the conical portion of the reel shaft 27. Then, the FR gear 30 provided on the supply reel 29 and the intermediate gear 35 are brought into a locked state, and a fast return state is obtained. Of course, when the switch lever 23 is rotated, the switch (not shown) of the motor 46 is also turned on and rotated.

Next, to explain the transition from the above-mentioned quick return state to the stop state, when the S board 39 is operated in the direction of the arrow in FIG. When they come into contact, the PS lock lever 25 rotates. Thereafter, the process changes to the stopped state in the same manner as the transition from the fast-forward state to the stopped state described above, resulting in the second state described above.

Of course, the switch (not shown) of the motor 46 is also turned off.
has been done.

Needless to say, with this configuration, direct transition from each state (for example, from the playback state) to another state (for example, fast forward or fast reverse) is also easily possible.

In the above-mentioned regeneration state, as shown in FIG. 21, the FR gear 30 provided on the take-up reel 28 and the As gear 36 are always engaged, and the As gear 36 is connected to the plastic magnet. It is molded from a material, and is arranged with a Mus S yoke 36L and a Mus S yoke 362.
L is a magnetic material.

As a result, the As gear 36 and the As yoke 36a attempt to rotate in the same manner. Further, since the AS yoke 36a has a convex portion on its circumference, the abutment of the convex portion with the As sensor 11 generates a rotational force in the direction of the arrow. Also, the locking shaft 1 of the second As lever 10 is rotatably held by the claw portion 11& of the As sensor 11 and the first As lever 9.
0a is always engaged by the aforementioned rotational force, the claw portion 10b of the second As lever 10 and the cam portion 33C of the large gear 33 are prevented from engaging. However, if the rotation of the take-up reel 28 is stopped (tape end state), the rotational force of the As sensor 11 in the direction of the arrow as described above disappears, and the rotation of the cam portion 330 of the large gear 33 causes the rotation of the second Locking shaft 102L of As lever 10
As shown in FIG. 5, the claw portion 112L of the AS sensor 11 and the locking shaft IC of the second A'S lever 10 are
) The locking of a is released, and the claw part 1 of the second As lever 10
0b and the cam portion 330 of the large gear 33 engage, the As lever 1o of the crusher 2 operates in the direction of the arrow in FIG. 21, and thereby the first As lever 9 also rotates in the direction of the arrow. However, since the first As lever 9 and the interlocking lever 12 are in a locked state, the interlocking lever 12 also slides in the direction of the arrow. This is a configuration in which 7p is displayed.

Further, in this embodiment, the output shaft of the motor 46 is the capstan shaft 16, which is a so-called dilate drive configuration. As described above, the capstan shaft 15 is provided with the capstan gear 47, and the capstan gear 47 and the large gear 33 are always engaged. Here, the amount of inertia due to the rotation of the motor 46 and the large gear 3
Since the amounts of inertia of the three wheels are the same, so-called anti-rolling properties are also ensured.

Effects of the Invention As described above, according to the present invention, with a simple configuration, it is possible to automatically shift from the playback state to the stop state at the end of the tape in the cassette tape magazine. Similarly, the transition from the recording state to the stop state can also be obtained without mentioning.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 to 21 show an embodiment of the present invention, in which FIG. 1 is a front view in a first state, FIG. 2 is a front view in a second state,
Figure 3 is a front view in the regenerated state, Figure 4 is a side view, Figure 5 is a front view in the first state with the decorative laminate removed, Figure 6 is a front view in the regenerated state with the decorative laminate removed, and Figure 6 is a front view in the regenerated state with the decorative laminate removed. FIG. 7 is a front view of the drive system in a stopped or fast-return state, FIG. 8 is a front view of the drive system in a regeneration or fast-forward state, FIGS. 9 and 10 are diagrams showing gear engagement states, and FIGS. FIG. 18 is a relationship diagram of the lever system, FIGS. 19 and 20 are diagrams showing a transition configuration from the first state to the second state, and FIG. 21 is a diagram showing an automatic stop state. 1...Cassette tape magazine, 2...
Main board, 3... Head board, 4... Head rotation plate, 5... H3L/bar, 6... Pinch arm, 7... Henodo lock lever, 8... Push-up lever, 9... First As lever, 10.
...Second As lever, 11τ arc AS sensor, 1
2... Interlocking lever, 13... P board, 14...
...As substrate, 15...Capstan shaft, 16...Reference shaft, 17...P
S board, 18... Decorative board, 19... Sub board, 20... PS support board, 21... Large gear board, 22... FRo lever, 23・
...Switch lever, 24...F lever, 2
6...PS lock lever 126...Magnetic head, 27...Reel shaft, 28...Take-up reel, 2e...Supply reel, 30...
...FR both gears 31... Reel pawl, 32.
... Reel cap, 33 ... Large gear, 34
...Friction gear, 36...Intermediate gear, 36...As gear, 37...P lever, 38...P shaft, 39...S board, 4o・・・・・・
S lever, 41...S axis, 42...P axis guide, 43...S axis guide, 44...standby spring, 46...cassette sensor pin , 4
6...Motor, 47...Capstan gear 0 Agent's name Patent attorney Toshi Nakao and 1 other person 1st
21%1 2 Fig. 14 J'7A 5 Fig. 15 7 Rotation Fig. 19 Fig. 21

Claims (1)

[Scope of Claims] A capstan gear provided on a capstan shaft, a large gear that engages with the capstan gear and includes a cam portion, a friction gear that slips and rotates coaxially with the large gear, and a take-up reel having a gear portion that engages with the friction gear and a fast-forward return gear that engages with the auto-stop gear; and a take-up reel that engages with the cam portion of the large gear and is rotatably held on the first auto-stop lever. an auto-stop yoke that slips and rotates with the auto-stop gear, and an auto-stop sensor that engages with the auto-stop yoke and also engages with the second auto-stop lever. , the auto-stop sensor when the rotation of the take-up reel stops. 1. A magnetic recording/reproducing device characterized in that it is configured to automatically shift from a reproduction or recording state to a stop state by operating a first auto-stop lever and a second auto-stop lever.