JPH0335736B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention has a tape loading mechanism,
The present invention also relates to a rotary head type playback device equipped with a so-called high-speed search function, and particularly to improvements in its operating members.

[Conventional technology]

In a rotary head type playback device that has a high-speed search function, that is, an operation mode (hereinafter referred to as search mode) in which the tape is run at high speed in the tape loading state to obtain a playback signal,
Since the tape is wound during high-speed running in both the loaded state and the unloaded state, setting the torques of the supply reel stand and the take-up reel stand becomes complicated. For this reason, in conventional devices of this type, both the supply and take-up reel tables are equipped with dedicated motors, and the rotation of these motors is controlled electrically or by using a complicated mechanical clutch. The torque of the reel stand in each operation mode is set.

[Problem that the invention seeks to solve]

Therefore, in addition to the normal fast forward and fast rewind operating members, the operating section also has separate operating members for search mode, one each for forward and reverse, which makes the configuration of the operating section more complex. , the space occupied by the operation section is also increasing. These drawbacks are particularly problematic when constructing a portable rotary head type playback device that is extremely required to be small and light and have good operability.

[Means to solve the problem]

The present invention was made in view of the above circumstances, and its purpose is to provide a rotary head type playback device having a high-speed search function and having an extremely simple configuration of an operating section compared to the conventional one. .

Generally, the search mode is set by rotating the capstan at a higher speed than the normal recording/reproducing speed in the tape loading state, and running the tape at high speed in the forward or reverse direction. In this case, the reel that takes up the tape (i.e., the take-up reel if the tape is running in the forward direction, the supply reel if the tape is running in the reverse direction) has a slip resistance set to an appropriate transmission torque. It is necessary to wind the tape through the torque section at a rotation speed set slightly higher than the tape speed in the search mode. On the other hand, normal fast rewinding and fast forwarding are performed by directly connecting the driving force of the motor to the supply reel or take-up reel, but in this case the winding torque increases and the tape runs at high speed. Therefore, it is not desirable to carry out the process with the tape in contact with a tape guide drum or other fixed head.

Therefore, the present invention reduces the number of rotations of the capstan in response to the operation of an operation member that presses the capstan and the pinch roller and commands high-speed tape feeding only when it is detected that the loading of the tape-shaped recording medium is completed. By enabling control, it is possible to stably run the tape-shaped recording medium using the capstan at high speed only when loading is completed. Furthermore, when the tape is in the unloading state, the running speed of the tape is set only by the reel, and the configuration is such that even faster running can be realized by operating the operating member that commands the tape to be fed at high speed. This is what I did.

With this configuration, the search mode, which is set only when tape loading is completed, and the high-speed tape feeding in the tape unloading state can be performed using the same operating member.

That is, the rotary head type reproducing apparatus according to the present invention includes a tape loading mechanism for attaching a tape-shaped recording medium at a predetermined angle around a tape guide drum including a rotary head, and a tape loading mechanism for attaching a tape-shaped recording medium at a predetermined angle to the periphery of a tape guide drum having a rotary head, a first operating member that commands reproduction of the signal and instructs the operation of the tape loading mechanism; a second operating member that commands high-speed feeding of the tape-shaped recording medium; detection means for detecting that the medium is in a loading completion state;
A nearby tape-shaped recording medium that is relatively movable in conjunction with the loading mechanism and that transports the tape-shaped recording medium stretched between the take-up reel and the supply reel in the longitudinal direction when the recording medium is in a loading completed state. a capstan and a pinch roller located at the top, a reel drive means for driving a supply reel stand and a take-up reel stand, a pressure contact means for pressing the capstan and the pinch roller together with the recording medium in between, and a rotation speed of the capstan. speed control means capable of controlling and setting the conveyance speed of the recording medium to a first speed and a second speed faster than the first speed, and the detection means detects that the recording medium is in a loading completed state. Only when this is detected, the pressure contact means brings the capstan and the pinch roller into pressure contact, and in response to the operation of the second operating member, the speed control means controls the capstan to move the recording medium to the second When the recording medium is in an unloading state, the reel driving means is operated in response to the operation of the second operating means to transport the recording medium at a high speed. It is something.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 show an overview of a rotary head type playback device according to an embodiment of the present invention. FIG. 1 shows the state before tape loading, and FIG. 2 shows the state before tape loading. The state after completion is shown in each figure. The tape loading method used in this situation is basically:
This is the so-called "M loading method." In FIG. 1, reference numeral 2 denotes a tape cassette, which is attached to a supply reel stand 1 as shown by a cassette mounting device (not shown).
The rotating shafts of the reel stands 12 and 13 are fitted into center holes of a supply reel and a take-up reel (not shown), which are arranged in parallel inside the cassette 2, respectively. Although not shown in the drawings, an opening for drawing out the tape is provided on the front wall of the casing of the cassette 2.
A magnetic tape is arranged so as to face this opening, and a notch is formed at a predetermined position on the lower surface of the casing into which a tape drawing means such as tape drawing members 3 and 4, which will be described later, is inserted. has been done.
Since the structure of such a tape cassette 2 is well known, it will not be described in detail here.

When the cassette 2 is installed in the predetermined position shown in FIG. 1, a tape drawer member 3,
4, pinch roller 5 and tape pull-out pin 35
a is inserted and arranged. The tape pull-out member 4 and the pinch roller 5 are rotatably provided on a loading ring 7, and the tape pull-out member 3
is rotatably provided on the loading ring 8. Further, the tape pull-out pin 35a is provided on the tape pull-out arm 35. The loading rings 7, 8 are connected to the tape guide drum 36.
are stacked around each other and rotated reciprocally by a loading motor 9. That is,
A gear portion is formed around the loading rings 7, 8, and gears 10, 11 mesh with each gear portion. These gears 10 and 11 are also in mesh with each other, and the rotation of the motor 9 is transmitted to the gear 11. Therefore, the loading rings 7 and 8 are always rotated in opposite directions by the rotation of the loading motor 9. When loading the tape, use the loading ring 7 above.
is rotated in the direction of arrow B, and the loading ring 8
is rotated in the direction of arrow C. In conjunction with the rotation of the loading rings 7 and 8, the tape pull-out members 4 and 3 are moved along a predetermined path by guide means (not shown), and the tape 39 is pulled out from inside the cassette 2. Then, it is attached around the tape guide drum 36 in a predetermined angular range of about 180 degrees. Note that a rotary head (not shown) is built inside the tape guide drum 36. This rotary head is for recording video signals on a tape attached around the guide drum 36, or for reproducing video signals recorded on the tape.

The pinch roller 5 has a loading ring 7
It is rotatably provided on a pinch roller arm 5a which is supported by a shaft 5b above, and is regulated by a guide means (not shown) in conjunction with the rotation of the loading ring 7 in the direction of arrow B. The tape 39 is moved along a predetermined path and brought into contact with the audio and control head 37 shown in FIG.
Located nearby. A pinch roller solenoid 38 operates upon detection of completion of loading.
The tape 39 is sandwiched between the tape 39 and pressed against the capstan 6, and the tape is run. In conjunction with the operation of the pinch roller solenoid 38, the take-up idler 28, which is belt-driven by the rotating shaft 19 of the motor 18, is brought into pressure contact with the take-up reel stand 13. 1
8 is transmitted, and the take-up reel stand 13 is rotated. Note that the rotation of the motor 18 is also supplied to the flywheel 6a of the capstan 6 via a belt hooked around the rotating shaft 19, so as to drive the capstan 6.

The tape pull-out arm 35 is rotatably supported by a shaft 35b on the base plate 1, and moves to the tape guide position shown in FIG. is brought into pressure contact with the full width erasing head 40, and in conjunction with a back tension control mechanism (not shown), the supply reel stand 1
2, and a predetermined back tension is applied to the tape 39.

Note that operating projections 7a and 7b are also formed on the loading ring 7. This protrusion 7
a and 7b are for operating the loading end detection switch 100 and the unloading end detection switch 101, respectively, when the loading ring 7 has rotated to the loading end position (the state shown in FIG. 2), and When it rotates to the unloading end position (first
The above switch 100 or 101 is in the state shown in the figure).
It is provided at a position where it is pressed with the protrusions 7a and 7b to turn it on.

In the above device, the ream stand 12 or 13 is driven at approximately the middle of the supply and take-up reels 12 and 13, which are rotatably supported on shafts 12a and 13a implanted in the substrate 1, respectively. This is done by pressing the installed idler 14 against the reel stand 12 or 13 on the winding side during fast forwarding. As shown in detail in FIGS. 3 and 4, the idler 14 is fixed to the upper end of an idler shaft 20 that is rotatably fitted into an idler stand 15. An intermediate ring 26 is fixed to the idler shaft 20 at the position shown in FIG. A sliding member 25 such as felt is adhesively fixed to the inner side of the lower surface of the ring 26, and an engaging convex portion 26a is provided on the outer side thereof. A drive pulley 24 is fitted to the lower part of the intermediate ring 26 of the idler shaft 20 so as to be rotatable with respect to the shaft 20 and also slidable in the thrust direction. The drive pulley 24 is composed of a disc-shaped flange 24a and a cylindrical boss 24b, and a drive belt (not shown) is hooked around the outer periphery of the disc-shaped flange 24a to rotate the capstan motor 18. Dynamic driving force is transmitted. For this reason, a recess 24c for housing the drive belt is formed at the outer peripheral edge of the collar 24a. Further, a pair of through holes 24d and 24d' are formed at predetermined positions of the flange portion 24a, and a clutch plate 23 is rotatably and slidably fitted to the outer periphery of the boss portion 24b. A pair of protrusions 23b and 23b' provided in a part of the
It is loosely fitted into the through holes 24d and 24d' formed in the flange 24a of the drive pulley 24. Further, a protruding edge 23a is formed on the outer peripheral surface of this clutch plate 23, and this protruding edge 23a is clamped by a U-shaped clamping portion 27d of a clutch switching plate 27, which will be described later. When the loading is complete, it is held at the position shown in the figure. Note that a stopper sleeve 2 is provided at the lower end of the idler shaft 20.
1 is fixed, and a coil spring 22 inserted between this sleeve 21 and the lower end of the boss 24b of the drive pulley 24 urges the drive pulley 24 upward in FIG. 3, that is, toward the intermediate ring 26. are doing. Therefore, the drive pulley 24 is always pressed against the sliding member 25 provided on the lower surface of the intermediate ring 26.
Therefore, in the state shown in FIG. 3, all of the rotation of the drive pulley 24 by the capstan motor 18 is transmitted to the idler shaft 20 via the member 25 to drive the idler 14.

The clutch switching plate 27 has the function of vertically sliding the clutch plate 23 with respect to the idler shaft 20, and has a pair of mounting arms 27a on its side edges, as shown in FIG. 27a'. Each of the mounting arms 27a, 27a' has a through hole formed therein, and as shown in FIG. , 1a' are rotatably mounted on the lower surface of the substrate 1 by commonly fitting the mounting pin 41 into the through holes. A portion of one end of the clutch switching plate 27 is cut and raised in an L-shape to form a clamping portion 27d that has a U-shape when viewed from the side. And this clamping part 2
The protruding edge 23a of the clutch plate 24 is accommodated in 7d and slidably held therein. Clutch switching plate 27
The other end is raised toward the substrate 1 by a bent step 27e to form an actuation piece 27b, which is located below the loading ring 8. A stopper portion 27c having a tape surface is formed on one side of the operating piece 27b. Note that the clutch switching plate 27 is urged to rotate in the counterclockwise direction in FIG. 3 by a spring (not shown), and this rotation is as follows.
This is prevented by the stopper portion 27c coming into contact with the substrate 1. Also, the loading ring 8
As shown in FIG. 6, an operating protrusion 8a is formed at a position corresponding to the end of unloading at the lower part of the ring 8. When the loading ring 8 is in the unloading state, this operating protrusion 8a engages the clutch switching plate. 27 and presses it, thereby rotating the clutch switching plate 27 clockwise in FIG. 3 against the biasing force of the spring. By this clockwise rotation of the clutch switching plate 27, the clutch plate 23 whose protruding edge 23a is clamped by the clamping portion 27d rises, and the through hole 24d of the drive pulley 24,
The protrusions 23b and 23b' of the clutch plate 23, which are loosely fitted to the clutch plate 24d', engage with the engagement protrusion 26a formed on the intermediate ring 26, and the capstan motor 18
The rotational driving force of the drive pulley 24 is directly transmitted to the intermediate ring 26.

The idler base 15 is rotatably supported by a shaft 16 implanted in the base plate 1, and is formed on the idler base 15 by a spring 17 attached to a pin 42 implanted in the base plate 1. The protrusion 5a is clamped and biased to the central position, and is normally regulated by both reel stands 12, 13 to approximately the central position. Note that a pair of arm portions 15b, 15c are formed on the idler stand 15 symmetrically with respect to the shaft 16, and these arm portions 15b, 15c are connected to the fast forward button 3, respectively.
The fast forward operation member 30 and the fast rewind operation member 31 are disposed opposite to the ends of the fast forward operation member 30 and the fast rewind operation member 31, which are slid by pressing the fast rewind button 31a and the fast rewind button 31a. Therefore, in conjunction with the pressing operation of the fast forward button 30a, the arm portion 15b is pressed, rotating the idler stand 15 clockwise and moving the idler 14 to the take-up reel stand 1.
3. Similarly, the arm portion 15b is pressed in conjunction with the pressing operation of the fast rewind button 31a,
The idler stand 15 is rotated counterclockwise to bring the idler 14 into contact with the supply reel stand 12.

In FIG. 1, reference numeral 32 denotes a sliding plate configured to slide to the left in the drawing in connection with the operations of the fast forward operation member 30 and the fast rewind operation member 31. By sliding to the left, the actuating lever 33, which is locked at one end, is rotated clockwise, and by displacement of the other end, the take-up idler 8 is separated from the take-up reel stand 13. Further, in conjunction with the operations of the fast forward operation member 30 and the fast rewind operation member 31, the switches 103 and 104 shown in FIG. 7 are turned on.

FIG. 7 shows a drive circuit for the loading motor 9 and the capstan motor 18 in the above-mentioned apparatus, and shows a state in which unloading is completed. In the figure, 100 is the above-mentioned loading completion detection switch, 101 is the above-mentioned unloading completion detection switch, 102 is a switch that is turned on when the play button 43 shown in FIG. 1 is pressed, and 103 is a switch that is turned on when the play button 43 shown in FIG. , fast forward button 30
The switch 104 that is turned on when a is pressed is a switch that is turned on when the fast rewind button 31a is pressed. These switches 100 to 104 are composed of normally open microswitches, which are in the ON state (i.e., conductive state) when pressed, and in the OFF state (i.e., non-conductive state) when not pressed. Become. And the above switch 1
One terminal of 00 to 104 is connected to the positive power supply V, and the other terminal is connected to the resistor R0 to ₁₀₄ , respectively.
It is grounded via R ₄ , and outputs P ₀ to P ₄ are taken out from the terminals on the grounded side via resistors R ₀ to R ₄ . Therefore, these outputs P ₀ to P ₄ are
When the switches 100 to 104 are in the ON state, that is, when they are pressed, they are at a "high level" and when they are OFF, that is, when they are not pressed, they are at a "low level." The loading motor 9 and the capstan motor 18 are DC motors, and the loading motor 9 is rotationally driven by a drive control circuit 44. This drive control circuit 44 has control terminals 44a and 44
It is equipped with b. When the control signal supplied to the control terminal 44a is at a "high level" and the control signal supplied to the control terminal 44b is at a "low level", a drive current is applied to the loading motor 9 in the direction of the arrow E, and the control signal is supplied to the control terminal 44a. When the control signal supplied to the terminal 44a is at a "low level" and the control signal supplied to the control terminal 44b is at a "high level", a drive current is supplied to the loading motor 9 in the direction of the arrow F so that the motor 9 is driven to rotate. It is configured. That is, the drive control circuit 44 includes, for example, a pair of PNP transistors T ₁ and T ₂ whose emitters are commonly connected and a pair of PNP transistors whose emitters are commonly connected as shown in the figure.
A bridge circuit is constituted by NPN transistors T ₃ and T ₄ , and the connection point S between transistors T ₁ and T ₃ is
A loading motor 9 is connected between the transistors T ₂ and T ₄ and the connection point T between the transistors T 2 and T 4 . These transistors T ₁ to T ₄ are connected to a pair of NPNs for control.
Switching is controlled by type transistors T ₅ and T ₆ .
That is, the base of the transistor _T5 is connected to the control terminal 44a via a base resistor, and when the transistor _T5 is turned on, the transistors _T2 and _T3 are turned on. . The base of the transistor T ₆ is connected to the control terminal 44b via a base resistor, and when the transistor T ₆ is turned on, the transistors T ₁ and T ₄ are turned on.
Since such a motor drive circuit is well known, a more detailed explanation of its configuration will be omitted.

The control terminal 44a is supplied with the output of a NAND circuit 46 via an inverter 45, and the output _P1 of the switch 101 and the switch 101 are supplied to the NAND circuit 46 via inverters 47 and 48, respectively. An output P ₂ of 102 is provided. The output of a NAND circuit 50 is supplied to the control terminal 44b via an inverter 49, and the NAND circuit 50 is connected to a switch 102.
The output P ₂ of the switch 100 and the output P ₀ of the switch 100 are supplied via the inverter 51. 52 is a drive circuit for the capstan motor 18, and a speed control circuit 5
21 and a drive control circuit 522. The speed control circuit 521 controls the rotation speed of the capstan motor 18 according to the control signal to a first rotation speed N ₁ at which the capstan 6 runs the tape 39 at a normal tape speed (first speed), or This functions to set the capstan 6 to a second rotation speed N2 that causes the tape 39 to run at the tape speed (second speed) in the search mode, and the output _P5 of the OR circuit 60 is supplied as a control signal. It's becoming like that. Then, the output of this OR circuit 60
When _P5 is "low level", the rotation speed of the capster motor 18 is set to the first rotation speed N1,
When it is at the "high level", it operates to set the second rotation speed N2. The drive control circuit 522 controls the capstan motor 18 in a rotating direction in which the capstan 6 drives the tape in the normal running direction (hereinafter referred to as the positive direction) in accordance with the supplied control signal.
The output _P6 of the amplifier 54 is supplied as a control signal. When the output P ₆ of the amplifier 54 is "low level", the capstan motor 18
is configured to drive in the forward direction, and to drive in the reverse direction when it is at a "high level". Such a drive control circuit 522, for example, constitutes a bridge circuit including four transistors similarly to the drive control circuit 44 of the loading motor 9, and controls switching of these transistors as appropriate according to control signals. Since it can be easily configured, detailed internal explanation will be omitted here. Further, the speed control circuit 521 can also be easily configured by, for example, changing the amount of current flowing through the capstan motor 18 in accordance with the control signal _P5 . In particular, when the drive control circuit 522 is configured using a bridge circuit consisting of four transistors as described above, the magnitude of the power supply voltage supplied to the bridge circuit may be switched in accordance with the control signal _P5 . Good. Therefore,
Here, a detailed explanation of its interior will be omitted.

Note that the AND circuit 53 includes an AND circuit 55
via the AND output of the output P ₀ of the switch 100 and the output P ₂ of the switch 102, and the OR circuit 56.
Output P ₃ of switch 103 and switch 1 via
The output P ₄ of the switch 104 is supplied to the amplifier 54, and the output P ₄ of the switch 104 is supplied to the amplifier 54. Further, the output _P1 of the switch 101 and the output of the OR circuit 56 are supplied to the AND circuit 59, and the output of the AND circuit 53 and the output of the AND circuit 59 are supplied to the OR circuit 60.

In addition, circuit block 5 indicated by a dotted line in the figure
Reference numerals 7 and 58 indicate a solenoid drive circuit and a clutch solenoid driven by this drive circuit. This circuit is added in the case of another embodiment using the clutch solenoid 58, and the output _P0 of the switch 100 is supplied to the solenoid drive circuit 57 as a control signal. This drive circuit 57 is connected to the switch 1
00 is configured to drive the clutch solenoid 58 when the output P ₀ is at a "high level".

To explain the operation of the above-mentioned device, when the tape is in the unloading state as shown in FIG. It is in a state where it is pressed by the actuating projection 8a. Therefore, the clutch switching plate 27 is located in a state where it is rotated clockwise in FIG. 3 against the urging force of a spring (not shown). Therefore, the clutch plate 23 whose protruding edge 23a is clamped by the clamping portion 27d of the clutch switching plate 27 is held in the raised position.
Projections 23b, 23 of the clutch plate 23 loosely fitted into the through holes 24d, 24d' of the drive pulley 24
b' is in a state of engagement with the engagement convex portion 26a of the intermediate ring 26. That is, in the tape unloading state, the rotational driving force of the motor 18 is applied to the drive pulley 24, the clutch plate 23, and the intermediate ring 2.
It is directly connected to the idler 14 via 6. Therefore, in this state, the fast forward button 30
a or by pressing the fast rewind button 31a and bringing the idler 14 into contact with the take-up reel stand 13 or the supply reel stand 12, the tape 39 is fed at high speed by driving the capstan motor 18 inside the cassette 2. It is done directly by force.

That is, when the fast forward button 30a or the fast rewind button 31a is pressed, the output _P3 of the switch 103 or the output _P4 of the switch 104 becomes high level, and the output of the OR circuit 56 becomes high level. Here, since the output _P1 of the switch 101 is at a high level, the output of the AND circuit 59 and the output of the OR circuit 60 are also at a high level. Therefore,
The speed control circuit 521 causes the capstan motor 18 to rotate at high speed in a direction according to the output P ₆ of the amplifier 54 via the drive control circuit 522 .

When the above-mentioned device is set to a playback state, the play button 43 is pressed. That is, when the play button 43 is pressed, the play button 43 is locked at the pressed position by a locking mechanism (not shown), the switch 102 is held in the ON state, and the output P ₂ changes from "low level" to "high level". Change. At this time, the loading completion detection switch 100 is in the OFF state and its output _P0 is at "low level", so all the inputs of the NAND circuit 50 are at "high level", and the output of the NAND circuit 50 changes to "low level". do. As a result, a "high level" signal is supplied to the control terminal 44b of the drive control circuit 44 of the loading motor 9. In this case, since the output _P2 of the switch 102 is in the "high level" state, one input of the NAND circuit 46 is in the "low level" state, and the output of the other control terminal 44a is in the "high level" state. Therefore, a "low level" signal is supplied. Therefore, a drive current flows through the motor 9 in the direction of arrow F by the drive control circuit 44, and the motor 9 starts rotating. As a result, the loading ring 7 is rotated in the direction of arrow B in FIG. 1 via the gear 11, and the loading ring 8 is rotated in the direction of the arrow c in FIG. 1 via the gears 11 and 10. The tape pull-out means 4 and 3 are respectively moved along predetermined paths to transfer the tape 39 to the cassette 2.
Pulled out from the inside to the outside, the tape guide drum 36
Start wrapping around it. At the same time, the unloading completion detection switch 101 is released from the pressure exerted by the operating protrusion 7b formed on the loading ring 7, and its output _P1 changes from "high level" to "low level". Loading 7 above,
8 is rotated within a predetermined angular range and loading of the tape 39 is completed, the loading completion detection switch 100 is pressed by the operating protrusion 7a formed on the loading ring 7 and becomes ON, and its output P ₀ changes from "low level" to "high level". Therefore, one input of the NAND circuit 50 becomes "low level" and the output of the NAND circuit 50 changes from "low level" to "high level". As a result, a "low level" signal is supplied to the control terminal 44b of the drive control circuit 44. At this time, control terminal 4
Since the output _P2 of the switch 102 is in the "high level" state, 4a is in the "low level" state as described above.
signal is supplied. Therefore, the drive control circuit 44 stops the rotation of the loading motor 9. As a result, the rotation of the loading rings 7, 8 is stopped. Further, upon completion of loading of the tape 39, the pinch roller 5 is pressed against the capstan 6 by a control means (not shown), and the output of the AND circuit 55 is at a high level, but the output of the OR circuit 56 is at a low level. Therefore, the speed control circuit 521 controls the capstan motor 1 to rotate the capstan 6 at the first rotation speed N1 that causes the tape 39 to run at the tape speed during normal playback.
Control 8. Then, in conjunction with the pressing of the pinch roller 5 to the capstan 6, the take-up idler 28 is pressed against the take-up reel stand 13 by a drive mechanism (not shown), and the take-up reel stand 12 is driven to take up the tape 9. Start. In this state,
A rotating head (not shown) disposed inside the tape guide drum 36 and a playback electronic circuit (not shown) read out electrical signals recorded on the tape 39, perform predetermined signal processing, and display the signals on a display (not shown). The data is supplied to the device and the recorded images are played back. In other words, the device is in a playback state. In this regenerated state, the actuating piece 27 of the clutch switching plate 27
b is released from the pressure of the operating projection 8a formed on the lower surface of the loading ring 8, and the clutch switching plate 27 is held in the position shown in FIG. 3 by being biased by a spring (not shown). As a result, the protrusions 23b, 23b' of the clutch plate 23 are
It is held in a position where it does not engage with the engagement convex portion 26a formed on the intermediate ring 26. For this reason, motor 1
The rotational driving force of 8 is transmitted to the idler 14 via the drive pulley 24, the sliding member 25, and the intermediate ring 26. In the above-described playback state, when the fast forward button 30a or the fast rewind button 31a is pressed, the idler 14 comes into contact with the take-up reel stand 13 or the supply reel stand 12, and the sliding plate 32 moves to the left in FIG. The operating lever 33 is rotated clockwise to move the take-up idler 28 to the take-up reel stand 1.
Separate from 3. Along with that, Switch 10
3 or switch 104 is turned on, and its output _P3 or _P4 becomes "high level."
Therefore, the output of the OR circuit 56 is "low level"
to "high level". At this time, the inputs P ₀ and P ₂ of the switches 100 and 102
Since both are at "high level", the inputs of the AND circuit 53 are all at "high level", and the output of the AND circuit 53 is at "high level". As a result, the output P ₅ of the OR circuit 60 becomes "high level", and a "high level" control signal is supplied to the speed control circuit 521, causing the capstan 6 to search the tape 39 for the capstor motor 18. The second rotation speed to run at the tape speed of the mode
Control the speed to rotate with N2. in this case,
The rotation direction of the capstan motor 18 is driven by the drive control circuit 522 in the reverse direction when the fast rewind button 31a is pressed and the switch 104 is turned on, and in other cases, it is driven in the forward direction. be done. As a result, the tape 39 is run in the forward or reverse direction by the pinch roller 5 and the capstan 6 at a tape running speed (second speed) in the search mode that is higher than the tape speed (first speed) during normal playback. Ru. At this time, as described above, the idler 14 is brought into contact with the reel stand on the tape winding side, that is, the take-up reel stand 13 during fast forwarding, and the supply reel stand 12 during fast rewinding, and is rotated by the idler 14. However, in this case, since the idler 14 has a mechanism in which the driving force of the capstan motor 18 is transmitted via the sliding member 25 as described above, the idler 14 is operated at a higher speed than the normal regeneration speed. The tape being fed can be smoothly wound with an appropriate torque.

To stop the apparatus in the reproducing state, the stop button 57 is pressed. When the stop button 57 is pressed, the play button 43 is unlocked by a lock release mechanism (not shown). As a result, the switch 102 becomes OFF, and its output _P2 changes from "high level" to "low level". As a result, the control signal supplied to the control terminal 44a of the drive control circuit 44 of the loading motor 9 changes from "low level" to "high level". At this time, the above switch 1
Since the output P ₂ of 02 is at "low level", the control signal supplied to the control terminal 44b is at "low level". As a result, the drive control circuit 44
A driving current is applied to the motor 9 in the direction of arrow E to drive the motor 9. In this case, the direction of the current flowing through the motor 9 is opposite to the direction of rotation during loading, that is, the direction of arrow F.
is rotated in the opposite direction to that during loading. Therefore, loading rings 7 and 8 each start rotating in the opposite direction to that during loading. Further, in synchronization with the rotation of the loading rings 7 and 8, the pinch roller 5 is separated from the capstan 6 by a control means (not shown), and in conjunction with the operation of the pinch roller 5, the take-up idler 28 is moved. It is separated from the take-up reel stand 13. At the same time, the loading completion detection switch 100 activates the actuation piece 7a of the loading ring 7.
is released from the pressure, and the switch 100 turns OFF.
state, and its output P ₀ changes from "high level" to "low level".

By rotating the loading rings 7 and 8 in the unloading direction, the tape pulling means 4 and 3 are rotated.
The tape 39 is moved in the direction in which the tape 39 is housed inside the cassette 2, contrary to the loading operation. In this case, the rotation of the loading ring 8 is transmitted to the supply reel stand 12 by a power transmission mechanism (not shown), and the excess tape is wound up. Then, when the loading ring 7 rotates to the unloading completion position,
The unloading completion detection switch 101 is activated by the actuating piece 7b.
is pressed and turns into an ON state, and its output _P1 changes from "low level" to "high level".
As a result, one input of the NAND circuit 46 becomes "low level" and the output of the NAND circuit 46 changes from "low level" to "high level".
The output changes from "low level" to "high level", and the control signal supplied to the control terminal 44a of the drive control circuit 44 becomes "low level". At this time, since the control signal supplied to the other control terminal 44b is at "low level", the drive control circuit 44 stops the rotation of the motor 9. That is, the rotation of the loading rings 7 and 8 is stopped, and the unloading is completed as shown in FIG. In this state, as mentioned above,
The operating piece 27b of the clutch switching plate 27 is pressed by the operating protrusion 8a of the loading ring 8. Note that the tapered surface of the stopper portion 27c formed on one side of the actuating piece 27b allows the actuating protrusion 8a to be connected to the actuating piece 27b during unloading.
The function is to guide the user smoothly.

As described above, in the above embodiment device, the driving force transmission mechanism that transmits the rotational drive to the idler 14 directly transmits the rotational force of the motor 18 to the idler 14 in relation to the rotation of the loading rings 7 and 8. The configuration is such that the first mode is switched to the second mode in which the rotational force of the motor 18 is transmitted via the sliding member 25. Therefore, the same idler 14 can be used to drive the reel stand during normal tape fast forwarding and fast rewinding and to drive the take-up reel stand during the search mode. Therefore, the reel stand drive mechanism in a rotary head type playback device capable of a search mode is extremely simplified, and the operating member operated when fast forwarding or fast rewinding within a cassette is replaced by the operating member during the search mode. The configuration of the operating section can also be simplified.

In the above embodiment, the clutch plate 23 and the clutch switching plate 27 are used to switch the driving force transmission mechanism from the first mode to the second mode, and the clutch switching plate 27 is connected to the loading ring 8.
The clutch plate 2 is displaced by the rotation of the clutch plate 2.
3, but the configuration is not limited to this. For example, the clutch switching plate 27 is configured to be displaced by driving the clutch solenoid 58 as shown by the dotted line in FIG.
It is also conceivable to configure it so that it is driven when is turned on.

Further, in the above-described embodiment, the idler 14 is rotationally driven by the capstan motor 18 via the driving force transmission mechanism, but the idler 14 is driven by a dedicated motor separate from the capstan motor 18. It is also possible to provide a motor and perform the operation.

As explained above, according to the present invention, it is possible to use the normal fast forward and fast rewind operating members as operating members for the search mode. Therefore, the configuration of the operating section of the rotary head type playback device having a high-speed search function can be simplified compared to the conventional one.

[Brief explanation of the drawing]

1 and 2 show the configuration of a rotary head type reproducing device according to an embodiment of the present invention, and FIG. 1 is a plan view in an unloading state, and FIG.
Figure 2 is a plan view of the loading state, Figure 3 is
Sectional view taken along line A-A' in Figure 2, No. 4
Figure 5 is an exploded perspective view of the driving force transmission mechanism, Figure 5 is a perspective view of the clutch switching plate, Figure 6 is a side view seen from the direction of arrow D in Figure 3, and Figure 7 is the loading motor and gear. FIG. 3 is a drive circuit diagram of a pushtan motor. 7, 8... Loading ring, 9... Loading motor, 12... Supply reel, 13... Take-up reel, 14... Idler, 18... Capstan motor, 23... Clutch plate, 24... ... Drive pulley, 25 ... Sliding member, 27 ... Clutch switching plate, 30 ... Fast forward operation member as second operation member, 31 ... Fast rewind operation member as third operation member, 38 ... Pinch roller solenoid as pressure contact means, 43... play button as first operating member, 521... speed control circuit,
522...Drive control circuit.

Claims (1)

[Claims] 1. A tape loading mechanism for attaching a tape-shaped recording medium at a predetermined angle around a tape guide drum including a rotating head, and a tape loading mechanism for instructing the rotating head to reproduce a signal from the recording medium, A first operating member for instructing the operation of the mechanism, a second operating member for instructing high-speed feeding of the tape-shaped recording medium, and detecting that the loading of the recording medium is completed by the tape loading mechanism. detection means;
A nearby tape-shaped recording medium that is relatively movable in conjunction with the loading mechanism and that transports the tape-shaped recording medium stretched between the take-up reel and the supply reel in the longitudinal direction when the recording medium is in a loading completed state. a capstan and a pinch roller located at the top, a reel drive means for driving a supply reel stand and a take-up reel stand, a pressure contact means for pressing the capstan and the pinch roller together with the recording medium in between, and a rotation speed of the capstan. speed control means capable of controlling and setting the conveyance speed of the recording medium to a first speed and a second speed faster than the first speed, and the detection means detects that the recording medium is in a loading completed state. Only when this is detected, the pressure contact means brings the capstan and the pinch roller into pressure contact, and in response to the operation of the second operating member, the speed control means controls the capstan to move the recording medium to the second When the recording medium is in an unloading state, the reel driving means is operated in response to the operation of the second operating means to transport the recording medium at a high speed. Rotating head type playback device.