JPS595452A - Tape sound recording and reproducing machine or reproducing machine - Google Patents

Abstract

PURPOSE:To reduce a load of a control motor, and to microminiaturize it, by providing a limiter spring between a head substrate driven by a pinch pressure spring and a limiter plate, and providing a negative spring between the limiter spring and a chassis. CONSTITUTION:A limiter plate 54 is slidingly engaged to guide pins 56a, 56b of a head substrate 20 energized in the forward moving direction by a pinch pressure spring 48, and a limiter spring 58 is provided between them. Also, a negative spring 60 is extended between an arm part 54a of the plate 54 and a chassis 19. Accordingly, force which is applied through the substrate 20 and the limiter plate 54 to a crank pin 50 rotated by a control motor for switching a mode becomes that which is obtained by subtracting the spring pressure of the negative spring 60 from the force of the pinch pressure spring 48, a load of the pin 50 becomes very small in both forward and backward motions, a load of the control motor is also reduced, and a micromotor can be used.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recording/reproducing machine and is most suitable for use in a cassette tape type portable tape recorder or tape player.

Portable or pocketable cassette type tape recorder f7C is a tape player, and the operation buttons such as recording, 8-play, fast forward, 1 rewind are replaced with electric contact switches or feather touch switches, and the operation mode is switched by a control motor. Something like this has been proposed. In such tape recorders and players, if the conventional mechanical mode switching device was simply connected to the drive by a motor, a powerful torque motor and a large capacity power supply would be required. Therefore, the price as a compact product is
lt is reduced.

Therefore, the present invention has been devised to reduce the load on the control motor for the reciprocating movement of the head board, which requires a drive torque as large as 1%, and can be driven by a reduced-sized motor and a small-capacity battery. be.

Examples of the present invention will be described below based on the drawings. A.

FIG. 1 is a perspective view of a cassette tape recorder to which the present invention is applied, with the cassette lid opened.

As shown in Figure 1, the operation surface of this cassette tape recorder includes a record button (1), a play button (2), and a stop button (3).
), a finish button (4), a fast forward button (5), and a microphone U-phone (6) are arranged. These operation buttons (1) to (5)
) is equipped with electric bush contact switches, and in response to these operations, a capstan motor and two microcontrol motors are controlled, setting the operating mode and running the tape. Cassette U Cassette 1i (7)
It is attached to the table 0111 of the
The positioning bin +81 t9) is inserted into the positioning hole of the cassette, and the cassette is set in the play state. At the same time, the take-up reel uO), the supply reel α0, and the feed reel Q21 are inserted into predetermined positions in the cassette.

For example, when the play button (2) is pressed in this state, the recording/reproducing head (131) and the pinch roller (1) are advanced and rotated to their respective operating positions by the control motor.

The capstan motor is then rotated and regeneration is performed. When the record button +1) is operated, in addition to the above operations, the erasing head (151) is rotated to its operating position.Also, when the rewind button (4) or the fast forward button (5) is operated, The combination of gears 6 is changed so that the power of the motor that drives the capstan (12) is directly transmitted to the take-up reel stand or the supply reel stand, and a tape rewind tycrz fast forward operation is performed.

FIG. 2 is a plan view of the cassette stacking section of FIG. 1 with the tape cassette Q7) attached thereto; FIG. Kasetsu 1- (
17) U positioning bin +81 (positioned by 91 and leaf spring 0 barrel. Recording head α3) is attached to the head board (20) which is movably mounted against chassis noise.
The pinch roller Q4) is placed above the stop mode position (swift position) and the low air tape (Jul < It is rotatably attached to the chassis (li) by the roller lever (221 and the fulcrum bin (2nd floor). Also, the erasing head αω is rotatably mounted on the chassis (li) by the eraser lever (25) and its fulcrum bin (at). Ti
installed on.

FIG. 6 is a half view showing the tape drive system. As shown in Figure 5 (Otsu Capsun (12) and winding, supply +)
-Lltj) 0.1) l'l: Rotationally driven by drive motor Cη. The belt 00) is hung on the motor pulley (c).

This belt O (capstan flywheel Gυ coaxial with the capstan (12) and reversing flywheel 09 by α) is moved by force. The motor (2η rotates in the direction of arrow A).

This allows the capstan flywheel (3]) U
The flywheel (29) is rotated 130,000 times in the direction of arrow C (counterclockwise), and the 2-inversion flywheel (29) is rotated in the direction of arrow O (clockwise).

The valley flywheels (3 (υ) have approximately the same mass and radius, and are rotated in opposite directions to create an anti-rolling effect that stabilizes tape running against the shaking of the entire cassette player. There is.

When the tape is fed at a constant speed in the contraction direction (FWD) during playback (PLAY) or recording (BMO), the drive wheel (3 and 5) coaxial with the capstan (14)
The idler (b) placed between the tape is wound up on the winder.

1 reversal flywheel (c) during fast forwarding (FF)
is moved in the direction of arrow E, and this inverted flywheel is moved 2
The gear (C) coaxial with 9) is meshed with the gear 0η coaxial with the 6-moat take-up reel stand, and the take-up reel ulj is rotated at high speed in the direction of arrow F'F. This causes the tape to advance at high speed.

When rewinding (REW), the gear 0 coaxial with the intermediate gear (3 ~ moves in the direction of arrow F and becomes the 1 reversing flywheel 09) placed between the 1 reversing flywheel and the supply reel ←υ. !1 is meshed with a gear (4 (2)) coaxial with the supply reel αυ. As a result, the supply reel (Ill) rotates at high speed in the direction of arrow RIBW, and the tape is rewound at high speed.

FIG. 4 is a half-view of the head substrate drive mechanism and mode switching mechanism, and the 1% Isotachibana stop mode position is not shown. FIG. 5 is a plan view showing details of the main parts of the head substrate. As shown in FIG. 5, the base of the head substrate (201
) is implanted with a guide bin (41), and this guide bin (4υ) slides into engagement with a rectangular notch (44) formed in the chassis 4. Also, the head (20b) at the end of the head board
) is formed with four wrinkles, and the guide pin (44J) implanted in the chassis (19) is slidably engaged with the elongate hole (・1~).Therefore, the head board (2Q) ( 4
.

It is supported by the chassis (191) so as to be slidable in the directions of the arrows PLAY/RgO and 5TOP in Figure @5.

As shown in Figure 4, insert the screw (47a) (47a) ( 4
7b) with a fixed δ.

The head board (2t) is engaged with its one end (20d) or the free end (22a) of the pinch roller lever (24), and the pinch roller lever (2t) is engaged with the free end (22a) of the pinch roller lever (24). Therefore, together with the pinch roller (14), the a
is biased in the direction of motion. On the other hand, the tip Q'A (20c) B of the head (20b) of the head board (20) is in contact with a crank pin which is moved in a reciprocating arc by a control motor (49J).Therefore, during playback or recording, the control The motor (4 wheels, and therefore the crank pin 50) is at the EC position in Figure 5, and at the fx P L A Y position 1d, I is ±5.
When it is rotated within the range of 'Ll', the head substrate 0) is advanced to the forward movement position. As a result, the recording/reproducing head a is advanced to the tape contact position.

As shown in the plan view of the control motor board in Fig. 6, the crank bin (501) is installed at an eccentric position of the gear 6υ. A sliding ring (50a) is inserted through the crank pin in order to reduce the friction.The gear 511 with the crank pin (5Q) is connected to the intermediate gear (54, through the worm wheel).

It is driven by a worm (49a) fed low to the shaft of a motor (49).

As shown in FIG. 4, the head substrate (20)! A limiter plate 64J is disposed on the opposite side, which is engaged with the head substrate and is reciprocated together with the head substrate by the crank pin 50). This limiter plate (54) is coupled to the head board (20) via a spring, absorbs the overrun of the crank pin 60), and holds the head board 01 at its a-movement position with a constant spring tension. It has the ability to display.

FIG. 7 is a half view showing details of this limiter plate 6υ. Base (2L]a) and head (20b) at the end of the head board
Guide pins (56a) (b6b) are implanted in the limiter plate 6.
4) are slidably engaged with the elongated parts (55a) and (55b) formed in the parts 6 and 6. A beam spring is passed between the arm part (54a) of limiter plate 6 and the end of the head board, so that the limiter plate c54 is always connected to the head board (2()).
It is biased in the direction of the mata power direction. In addition, the arm portion (54a)
The load-cancelling spring ω0) is fully connected between the pin 9) and the pin 9) installed in the chassis 4. This cancellation spring (60
) has the effect of reducing the force of the pinch pressure spring (481) applied to the head substrate (481), thereby reducing the deflection of the control motor (49).

The head (ri 4b) of the limiter plate (54) has a U-shaped hook portion (54c) (5) that engages with the crank bin 0 (2).
4d) is formed. When the crank bin 6 is rotated to the REO position or the PLAY position shown in FIG. 7 during recording or playback, the limiter plate 64 is moved in the forward direction together with the head board 2.

FIG. 6 is a half view showing the forward movement of the head substrate (20) and limiter plate f54). When the head board (20) is in the backward movement position shown in FIG. 5, the head board (shaft) is biased in the forward movement direction by the pinch pressure spring (48) as described above. Around (P
The head board (20) and the limiter plate 54J are moved a as the head board (20) and the limiter plate 54J are rotated (LAY) or counterclockwise (RBO),
It also moves back when stopped. At this time, the head board (I!
A force in the opposite direction to the force of the pinch pressure spring (marked 4) applied to the crankbin (501) through I is applied to the head board ( 201 guide pin (56a) (b6b) 7!-
It is attached to the intermediate head board (20). Similarly, a pinch pressure spring (48
) is subtracted by the above-mentioned counter-spring force. This rice polishing is applied as a load to the crank bin mark on the head board (J
The lateral pressure of the limiter plate 64) and limiter plate 64) becomes very small during both forward and reverse excitation, and even a small 1-trigon torque control motor (491) can easily reciprocate the end of the head board. be.

Since the head board (2) and the limiter plate 64) are integrally moved by the rank pin ←0), the head board C'il), ! : +) The limiter by which is stretched between the limiter plate 6a and the motor (the load will not be on 4).

When the head board CIO moves a certain distance in the forward movement direction.

As shown in Figure 8, pinch rollers A41 are attached to each capstan α.
comes into contact. In this state, 1l-r, 1 pinch roller lever (22I) is separated from the end of the head board, and the pinch pressure spring (
4. The pressing force caused by Enoki disappears. Therefore, after that, the limiter plate C541, which is being moved forward by the crankbin group, will pull the head board (2@) in the forward movement direction via the limiter spring 0. At this time, the load applied to the crankbin ei01 is the limiter plate (51 However, since the moment of the crank pin (501) is in the backward movement direction, the control motor (49J) will not be overloaded.

The guide bin (4) embedded in the head board (20)
As shown in Fig. 8, when it comes into contact with the rear end (42a) of the guide notch (44) of the chassis a
jjt is determined. On the other hand, the limiter plate is further advanced from the position indicated by the dashed line (54x) in FIG. 8 to the position indicated by the solid line.

The tension of the limiter spring 1581 generated at this time holds the head substrate at its forward movement position.

Crankbin (5I plays (PLAY) and records (R)
f! When moving back from the position 30) to the stop mode position, the canceling spring and the six limiter springs each pull the limiter plate 54 in the direction of the return movement of the crank pin G0, so that the control motor H9) 0) Starting torque should be small. In addition, the force against the pinch pressure spring (61), which is required during the backward movement of the head base a, is subtracted by the canceling spring (61) as in the forward movement, and the load on the control motor (491) is greatly reduced. Avoid.

As shown in FIG. 4, the bent portion (62a) of an idler lever (621) that rotatably holds the idler (b) with an axial load is engaged with the arm portion (20e) at the end of the head board. This idler lever is rotatably supported by a support shaft installed in the chassis H, and is biased clockwise by a spring 1).

When the head board moves forward to the forward position, the arm part (20e) of the head board (2) and the bent part (62a) of the idler lever engage or disengage, and the idler lever ←4μ
Rotates 1lt(9) per hour. As a result, the idler 〇Y is quickly engaged with the drive wheel G4, which is coaxial with the capstan (゜゜), and the take-up reel stand G (3), and the take-up reel Cl0
is rotated in the tape winding direction.

FIG. 9 shows the operating state of the main parts in the raw state, and FIG. 10 is a side view of the capstan and take-up reel portion as seen from the direction of the arrow in FIG. During playback, the control motor (
49) Crank bin ← [clockwise about 90”
Rotated, as described in FIG.

The head base plate (201) is reciprocated, and the head a-base is advanced to the tape contact position.The head base plate (201) is also pressed against the pinch roller (141) or the capstan (I2), and the tape is run.

Further, as shown in FIG. 10, the idler 64) is pressed against the drive wheel 04 coaxial with the capstan u21 and the take-up reel stand, and the take-up reel uO) is rotated in the direction of the arrow PLAY in FIG. The tape is wound. Note that since the regeneration mode or other operating modes are switched by the control motor and worm gear system, there is no device for locking the drive mechanism in the trough mode. This is because the worm gear system cannot be driven by the load on the crankbin 601 unless the control motor operates.

Next, the recording mode (FLEO) will be explained. In this mode, the forward movement of the head substrate and the drive of the take-up reel are the same as in the reproduction mode. As shown in FIG. 4, a recording lever 51 is disposed between the head board (20) and the chassis 01, and in the recording mode, the recording lever (657) (lO) is operated.

FIG. 11 is a plan view showing the measurement of the recording lever (6ω) in the stop mode position. A cam portion (65a) that engages with the crank pin 6ω is formed on the cam portion (65a).
Is it straight with the H curve part (65b)? H@s (6b'c), and one song Nto (6bb) has the same diameter as the maximum rotation diameter of crank bin 0. Therefore, if Lord Crankbin was rotated clockwise at the first birth, @ the recording lever (b
5J is not operated. Also, when recording, the crank bin [phase]
When is rotated counterclockwise, the straight leg portion (65c) of the cam portion (65) is pushed by the crank bin 61, and the recording lever ←51 is rotated clockwise.

The active end (65d) of the recording lever (65t) is the erasing head that rotatably supports the erasing head 04.
(2!) is engaged with the working pin (25a) of the IJ, and in the stop mode, as shown in Fig.
A hook (68) is provided between the recording lever (65!) and a bent portion (65e) formed at the tip (65d) of the recording lever (65!).

A claw part is attached to the active side of the recording lever (65), and this claw part (691) and the knob (70) of the recording/reproduction selector switch (70) fixed to the circuit board (not shown) engage. Figure 12 shows one end of the recording record when in recording mode.
It shows the operation of j. As explained in Figure 8 (ko, d
At the time of self-recording, the control motor (4 crankbin 6 [〃
When turning the head, the head board (i
At the same time, the take-up reel [10] is rotated in the take-up direction via the idler. At the same time, the recording lever Akatsuki is moved to the supporting shaft (6η
Rotates clockwise around the center. As a result, the tip (65d) of the recording lever (6ω) is disengaged from the action bottle (25a) of the erase head (c), and the erase head bar 351 is pulled clockwise by the spring. The erasing head lever CI!!lil comes into contact with one end of the chassis (11) and stops, and the erasing head α51 is held in the operating position shown in FIG. 12 by the tension of the spring.

In addition, at the operating position of the recording lever (6 (g) in Fig. 12,
The claw (mark 6) attached to the recording lever (6ω) slides the knob (7υ) of the recording/reproduction switch (7o) toward the recording side, putting the % recording circuit into operation.

When returning from the recording mode to the stop mode, the side edge (2t) f) of the head board is moved to the erase mode (-(2□
It is engaged with the action bottle (25a) of □□, and the head board (2
) The erase head lever (25) is pushed back as the recording lever (150) returns to the stop mode position and is moved counterclockwise 9.
This allows you to turn the recording/playback switch (knob 701)
υ is switched to the playback side.

Next, to explain the fast-forward mode, as explained in FIG. , the take-up reel shaft is rotated at high speed in the winding direction.As shown in FIG. The gear (to) and the six gears are combined.

Figure 16 is a plan view showing details of a part of the fast-forwarding lever.
FIG. 4 is a plan view of the operating state, and FIG. 15 is a partial side view as seen from the direction of the arrow (b) in FIG. 14. As shown in Figs. 16 and 15, it is rotatably supported on a support shaft (73) implanted in the fast-forward lever (7 is a chassis beam), and a U41111 (741) is attached to the working end of this lever. A reversing flywheel (29) is rotatably attached to the drive end (72a) of the fast-forwarding lever (74). (75). Also, the bent part (72c) formed on the drive end (72a) of the fast-forward lever (7) and the pin (72c) implanted in the chassis (1→
A spring (77) is connected between the lever and the spring (77), and the tension of this spring (77J) urges the fast-forward lever to rotate counterclockwise.

The second crank bin (751) is moved in a reciprocating arc by a second control motor U-barrel shown in FIGS.
) is performed. Crankbin (751
The fast forward mode is a state in which it is rotated 90 degrees clockwise from the stop mode position in FIG. 4, and the rewind mode is a state in which it is rotated 90 degrees counterclockwise from the stop mode position.

As shown in the scale drawing of the control motor board in FIG.

The crankbin (t5) is eccentrically attached to a gear (791), and connected to this gear via an intermediate gear (0) and a worm wheel (IJ). ) to be driven @-a.

As shown in Fig. 14, when the crankshaft (γω) is rotated clockwise to the fast-forward position It (?'k'), the fast-forward lever (74) rests until the rest part (72d) comes into contact with the pin (7-). , the fast forward lever (14) is rotated counterclockwise around 11 by the spring (77).
As shown in the figure and Fig. 15, the reversing flywheel (2) and the coaxial - wheel (with the take-up reel opening 0) and the coaxial float 07
), the take-up reel α0) is rotated at high speed in the direction of arrow P'F in FIG. 14, and the tape is rapidly fed.

When the rewind is in the seventh position, the crank pin (75) is rotated to the rewind mode position (R, EW) in Fig. 16. 72b), so there is no operating field for the fast-forward lever (γ21).

Next, the winding mode will be explained. In this mode, as explained in FIG. In order to operate this intermediate float S~, use the rewind lever shown in Figure 4.
! It is arranged to engage with the crank bin (151).

Figure 16 is a half-view showing the details of the winding lever (goods).
@Figure 17 is a flat (8) diagram of its operating state, and Figure 18 is the first diagram.
FIG. 7 is a partial side view seen from the direction of the arrow [phase] in FIG. 7; 1st
As shown in Figure 6, No. 18, rewind lever (84)
The lever is rotatably supported by a distal shaft (delta) installed in the rL chassis (2), and a shaft (intermediate gear C38 via 8ii1) is rotatably attached to the working end of this lever. The drive end (84a) of the rewind lever (8) has an arcuate edge (84).
b) is formed, and this edge (84b) is engaged with the previously mentioned second crank bin (T-hull).Also, a bent portion is formed on the drive end CB4a of the rewinding lever. (8
A spring (8 barrels) is installed between the pin 03'O planted in the chassis A, and this spring tlia
The rewind lever is biased to rotate counterclockwise by a tension of 1.

When the crank bin (15) is rotated counterclockwise to the rewind position (REW) as shown in FIG.
A stopper pin (with a reed of 41 ft) installed in The intermediate wheel (to) is engaged with the reversing flywheel 0 and the coaxial gear and the supply reel αυ and the coaxial float (4 (υ). Therefore, the supply reel circle is moved in the direction of the arrow REW in Fig. 17. is rotated at high speed and the tape is rewound.

In the fast-forward mode, the crank bin (75) is rotated to the fast-forward mode position (FF) shown in Fig. 16, but the crank bin (75) is rotated along the arcuate edge (84b) of the rewind lever. One rewind lever (goods) because it moves
The system cannot be activated.

Next, playback cue (fast forward) and review C rewind)
I will explain about it. These modes are activated when rewind/unload (4) and fast forward/unload (5) in Figure 1 are operated during playback.When these buttons t414 or (5) are operated, the control The motor (49) operates, and the crank bin (50) is once returned to the stop position from the playback mode position (PLAY) in FIG. 9, and then rotated to the playback mode position again.

Along with this, the head substrate Cl0 (a is moved back once and then moved forward again. At this time, the stop lever ω1 shown in FIG. 4
) acts, and the forward movement of the head board (21U) is blocked in the middle of the forward movement.Next, in this state, the control motor (18) operates, and the fast forward mode shown in Fig. 14 or the wide movement mode shown in Fig. 17 is activated. Changed to f71 in return mode.

A queue or review takes place.

As shown in Fig. 4, the stop lever (91) is rotatably supported by a support shaft (9) installed in the chassis (1 bell), and a spring (91) stretched between it and the chassis Q bell (91). The IFJ is biased to move counterclockwise by the bolt.A stop lever (a stop lever that engages with the arm (20e) of the head board) is fixed to the working end (91a) of 91. Stop lever (9υ operating end (91b)
Solenoid (91i)
) is fixed. During playback or recording, the solenoid (951) is not energized, so when the head board 0 moves forward, the inclined edge (20
g) is the stop lever (9〃's stop 7° pin (94I)
When damaged, the stop lever (91) is released clockwise as shown in the reproduction mode diagram of FIG. Therefore, the forward movement of the head substrate 0 (1) is not blocked midway.

FIGS. 19 and 20 are half-view diagrams showing the queue and review mode, respectively. In these modes, as described above, the head board I moves backward once and then moves forward, but at this time, the solenoid is turned on and the stop lever (9) is connected to the operating hole (91). iron piece (96
) is adsorbed. For this reason, the arms (
2[Je] sloped edge (209) has a sl-tubbin (
By hitting the circle, the forward movement of the head board (20) @
It is stopped midway as shown in FIG. 19 or 20. In this state, 1J, pinch roller (14) on the capstan A bottle.
The pressure can be firmly welded. Further, the limiter plate 6a slides with respect to the head substrate 4, and independently advances 111 times to the forward movement position.

Therefore, the crankbin will not be subject to any extra load.

In this state, the crankshaft motor (7) is pivoted, and the crankshaft (□) is moved to the fast-forward mode position (see Fig. 19).
F l') When the tape is finally rotated to the rewind mode position (1-tEVV) as shown in FIG. There will be a review soon.

When the play button (2) is operated again during cue or review, the solenoid (9ω) is turned off.Then, the stop lever (9υ) becomes able to rotate, and the stop pin t94 is rotated to prevent the head board from tilting. Edge (21) g)
The head board (201) is moved forward to the forward movement position shown in Figure 9. -1' At the same time, the restraint motor (78) operates and the crank bin (4) is moved to the stop mode position. Then, the tape running system returns to playback mode.

By adjusting the mounting position of the solenoid (99 on the chassis (11), the cue and review head (I
3) You can adjust the protruding hair. That is,
Depending on the mounting position of the solenoid (9851), the tilting F etsun (2t) formed on the arm (20e) of the head board
Since the contact position of the stop bin (94) with respect to Jg) changes, the amount of protrusion of the head (13) can be changed thereby.

Next, FIG. 21 is a schematic half-view showing the main parts of the tape drive system.
FIG. 22 is a sectional view taken along the -@ line in FIG. 21. As mentioned above, the cassette recorder of this embodiment uses the capstan flywheel 01) and the inverted flywheel (c) to obtain an anti-rolling effect. In addition, gears 0!9 (3!1) are coaxially attached to the reversing flywheel 0υ, and these are meshed with the gear u'0 coaxial with the take-up reel UO+ and the intermediate gear (2) for fast forwarding and rewinding. This is very advantageous in terms of space factor and number of parts, and the structure is suitable for compactness.

This will be explained by comparing it with the approximate half-view of a conventional tape drive system shown in Figure @26.

A belt (t) is wound around the gear screen flywheel (981), and an inverted flywheel (101) is placed between the motor (100) and the capstan flywheel (981), and a part of its circumference is Bell l-(99) was in contact.The axis of the reversing flywheel (101) was fixed;
Goo is pressed onto and separated from the 1st take-up reel stand (102) for fast forwarding! , I (103) and the inverted flywheel (
Another belt (105) is interposed between No. 9 (104) of No. 101), and an idler (106) is connected to the reversing flywheel (101) and the supply reel stand for unwinding. ('107) and were arranged to be connected and separated from each other.

On the other hand, in this embodiment, as shown in FIG. -(30)K wrapped around. This structure has a degree of freedom in the position of the reversing flywheel as compared to the one shown in FIG. If the structure is such that gear 0 and Cll are installed, the intermediate goo') (103
), it is possible to perform fast forward operation by connecting both cars, and the structure is therefore simpler and the space factor is also improved.

Note that as in this embodiment shown in FIG. 21, the winding angle of the belt (30) around the capstan flywheel 61) is 9.
If the angle is 0° or more, the flywheel u]) and the belt (,3(
The frictional force between 1) becomes smaller and a slip occurs between the two, and the driving force of motor C1!7) is transferred to the flywheel OI).
may not be transmitted reliably. In this case, slight fluctuations in the load torque while the tape is running will change the round rotation speed of the flywheel 6, making the tape running unstable and worsening tow and flutter.

For this reason, as shown in Fig. 22, when the angle of the contact side of the bell) 001 (square belt) is 90°, the opening angle of the groove (29a) of the inverted flywheel e9) should be approximately 90°.

On the other hand, the Vg (31a
) has an opening angle of approximately 70°. This makes it possible to increase the driving force of the flywheel (31) even if the winding angle of the belt (two belts that have good biting with the trowel) around the V-groove (31a) of the gear-stamped flywheel O1l is small. It is possible to prevent slips and reduce wow and flutter.

Next, detection and control of the rotational position of the crank bins 5 (2) (75) shown in FIG. 6 will be explained. Figure 24 is the 6th
It is a sectional view taken along the (b)-button line in the figure, and is a bottom view of the gear 6]) provided with the crank pin 6Ql in FIG. 25. Second
As shown in Figure 4, the control motor board (1
It is rotatably supported by a shaft (109) implanted in the shaft (109), and a crank bin 6 is attached to the boss (51a) at an eccentric position.
0) is attached, and a sliding ring (50
a) is cooked. On the bottom of the gear 6υ, there are six brushes (110a) to (11U) as shown in FIG.
c) A contact member (110) made of phosphor bronze or the like is fixed thereto.

The board (108) is a soft iron plate with a resin layer pasted or coated on it, and is used as a mechanical structural member (chassis) and a yoke of the motor (481C (81)).

On the surface of the resin layer, a contact pattern copper foil (111) for detecting the rotational position of the crank bins 6 and (751), an output lead wire of the '& contact pattern, a motor's ridge source line, etc. are printed and wired. .

FIG. 26 is a partial perspective view showing the main part of the contact pattern copper foil (111) formed on the control motor board (108). Common ground patterns (112) (116) and output cover turns (114A) to the contact pattern copper foil (111)
(114B), 1111 (109) of gear 6υ
A common grounding pattern (112) and output cover turns (114A) to (1140) are arranged concentrically with respect to the shaft (115) of the gear (79), and a common grounding pattern (113) and a common grounding pattern (113) are arranged concentrically with respect to the shaft (115) of the gear (79). Out cover turn (1141)
) (114M) are arranged.

Crank pin ψ (2) on the common ground pattern (112)
The stop mode position 1t (S'I'UP), the 8 raw mode position (PLAY) and the recording mode position (RgO) are connected to the corresponding position detection contact pattern (112C-8TO).
P, (112A)-PLAY, (112B)-RE
tfC, the common ground pattern (115) is the stop mode position (5TOP) of the crank bin (75),
Fast forward mode position (FF) and rewind mode position 1i
Position detection contact pattern (ii6o) -8'L'OP, (113D) -F' corresponding to the husband of 1()LEO)
f! ”, (113B)-HEW is provided.Each stop position and contact pattern (11
The position of the contact member on the surface of the gear is set so that the mechanical positions of 30) to 11513 correspond to each other.

When the potential of the common ground patterns (112) (113) in Fig. 25 is set to logic ``0'', the output codes (A, E) of the output cover turns (114A) to (114K) at the valley detection angle position (here) are It is as shown in table f.

Next, FIG. 27 shows a control circuit diagram of the control motor (Toru Co., Ltd.) and the drive motor (27).The structure of the position detection switch shown in FIGS. 25 and 26 is the switch circuit shown in FIG. 117) (118), common ground patterns (112) and (113) are used as driving contact points, and
Output cover turns (114A) to ('+14]() are fixed contact side, fixed contact side K Fl, P, LAY, 8TO,
It can be considered as a changeover switch provided with contact patterns of P, 11F3 (1 & H FF, 5TOP, and 1-1EW).

Output code A-Ei12% shown in the table above Rotation angle of each contact pattern (contact pattern (112A) to (1
120) and (corresponding to 116(J) to (1131;))
and is supplied to the control logic i 0 (119).

Control IC! (119) corresponds to the human power of the operation keys (11 to (5)) and position detection codes A to E in FIG.

The position of the crank pin 150j (75) is determined when the key is operated, and the primary control motor (491 or (119) is driven to stop rotating - fc is reversed), and when the target (9) excitation position is detected, the control motor is activated. -Motor (4!1 t',?c U
ffe K
't8+ -S2 occurs. In addition, in synchronization with the stoppage of these control motors (491 Toru), AM No. S5, which drives the capstan drive motor Co., Ltd., is connected to a servo circuit (120
).

The control signal S4 of the control logic IO (119) energizes the nnnoid (95) during cue or review.

The switch αQ inserted into the ground line (121) in Fig. 27 is turned on and off in conjunction with the opening/closing operation of the cassette lid (force) as shown in Fig. 1, and when the cassette lid (7) is closed. When the switch 6) is turned on, the control terminal I/O (119) is energized. When the cassette lid (7) is opened when the cassette is attached or removed, the control logic I0.( 119) does not operate, even if one of the operation buttons (1) to (5) is operated, neither the tape running system nor the mode switching mechanism is operated.

Therefore, damage to the internal mechanism of the tape or tape recorder can be prevented.

Next, FIG. 28 shows an operation time chart of the control motor and the capstan drive motor. Kono'5% 11
Since JiψIJ's tape recorder is mainly used with built-in batteries, a control motor (4ω(
Nagisa and capstan drive motors (two forces are prevented from operating at the same time.When in regeneration mode,
First, as shown in FIG. 28A, the control signal S1 is set to the control logic I.
0 (119), the control motor (4!1 stops rotating, and the crank pin ψ rotates clockwise to enter the regeneration mode. Next, the control signal S6 is generated, and the drive motor reflex 1 When switching from the regeneration mode to the stop mode, the drive motor shift (shift) is first stopped as shown in Fig. 27, and then the control motor (shift) is reversed and the crank bin kettle is brought to the stop mode position. In the case of the self-recording mode, the control motor (49) is rotated forward and backward, as shown by the dotted line in FIG. 28A, or in the opposite direction to the playback mode.

In the fast forward mode, as shown in FIG. 28B, the control 1111 signal S2 first causes the motor (781) to rotate forward,
After the crank pin (7ω) rotates clockwise and enters the fast-forward mode, the drive motor 0η operates and fast-forwards the tape. When returning from the fast-forward mode to the stop mode, the drive motor (2) returns to stop and control motor (7
~ is reversed and the crank bin σ clause is returned to the stop mode position. In the rewind mode, the control motor (7gI forward and reverse rotation is performed in the opposite direction to the fast forward mode, as indicated by the dotted line in FIG. 28B).

In the case of a queue or review in endogenous mode, the second
8. As shown in FIG. 0, the control signal S1 causes the H]1'' rotation (49) to be reversed, and the crank pin 5Ql is returned to the stop mode position. At this time, control I41 signal S4
As a result, the sononoid (95) is turned on, and the control motor 4 is further rotated in the forward direction to set the end of the head board at the cue and review positions. Next, the control motor (44) or stop rotation (when cueing) is reversed (when reviewing) by the ζ control 41 count S2, and then the drive motor (27 ) is turned on and cue or /view is performed.When returning to playback mode, the second
8 As shown in Figure 0, when the drive motor 271 is turned off, the renoid (9ω) is turned off, and the head board (20
1 is returned to the reproduction mode position (forward movement state). At the same time, the control motor is rotated reversely or forwardly, and the crank pin t1 is returned to the stop mode position. Next, the drive motor C27) is turned on.

The playback operation is performed again.

In this way, the control motor 0 and the drive motor (27) are not driven at the same time when each mode is switched, and the built-in battery of 9 or 3V can be used satisfactorily.

As described above, the present invention uses the pinch pressure spring (48) to bias the pin roller α in the direction of the capstan (IJ), and also biases the head board (2) in the moving direction G:, and the limiter plate (54I) to the head. Attach the control motor (49J) so that the limiter plate 0 is moved more than the head board (2) so that it can be moved more than the limiter spring. The pinch pressure spring (which acts in the direction of canceling the biasing force caused by the decoy) is inserted between the limiter plate (54) and the chassis u0. The spring was handed to me.

Therefore, according to the present invention, the load of the reciprocating movement of the head board and limiter plate by the control motor (4!
Therefore, it can be driven by a small-sized Tanabata with a torque of 1"1 and a small capacity battery, and the tape recorder/player or Niu machine can be made more compact.

[Brief explanation of the drawing]

Fig. 1 is a side view of the cassette tape recorder to which the present invention is applied, with the cassette holder opened and in good condition, Fig. 2 is a plan view of the cassette loading section of Fig. Figure 6 shows the tape drive system. 1 - Half view, Figure 4 -
・1-half view showing the RAD board drive mechanism and mode cutting mechanism, Fig. 5 is a plan view showing the head board of Fig. 4, and Fig. 6 is a half-view of the control motor board showing the control motor and worm gear part. figure. FIG. 7 is a plan view of the limiter plate shown in FIG. 4, FIG. 8 is a plan view showing the forward movement state of the head board and limiter plate, and FIG. Fig. 10 is a side view of the capstan section and take-up reel section as seen from the arrow in Fig. 9, Fig. 11 is a half-view of the recording lever in the stop mode position, and Fig. 12 shows the record in the recording mode position. A half-view showing the lever, FIG. 13 is a half-view of a part of the fast-forward lever, and FIG.
Figure 17 is a plan view of a part of the fast lever, Figure 17 is a plane view showing the operation of the rewind lever, Figure 18 is a side view of the main part as seen from the direction of the arrow in Figure 17, and Figure 19 is a plan view of a part of the fast lever. 21 is a plan view showing the operation of the valley in the cue mode; FIG. 21 is a half-view showing the operation of the valley in the review mode; FIG. 21 is a schematic diagram showing the main parts of the tape drive system shown in FIG. 6. Plan view, Figure 22 is the 21st
26 is a schematic plan view showing an example of a conventional tape drive system, and FIG. 24 is a sectional view taken along line 10 in the figure.
Fig. 25 is a cross-sectional view taken along the line - [Fig. The partial plan view shown in FIG. 27 is an open view of the control motor and drive motor.
The circuit diagram and FIG. 28 are operation time charts of the Toll cape motor and the Capsun drive motor. In addition, in the codes used in the drawings, 04...
...... Capstan (131...
・・・・・・Recording/playback head (to)・・・・・・・・・・・・
Head board C17J・・・・・・・・・Pinch roller lever (4al・・・・・・・・・Pinch pressure spring (4ω・・・・・・・・・Control motor 64)
・・・・・・・・・・Limiter plate 68)
......Limiter spring (bO) performance...
...Negation (ne). Agents Katsu I Ueya, Yoshio I Tsune, Shunka Sugiura (order) procedural amendment (method), October 12, 1980, Mr. Commissioner of the Japan Patent Office ■, small case indication Showa Special Request No. 115722 of 1957 2, Title of the invention - Arp recorder/player or player 6 Number of inventions increased by amendment 292-

Claims (1)

[Claims]! ff1J fl+41 In a tape recorder/player or a player in which a head board holding a head is reciprocally moved between an operating position and a non-operating position by rotating the motor in the forward and reverse directions, the pinch roller is urged toward the capstan and the pinch roller is a pinch pressure spring that urges the head substrate with the roller lever secured thereto in the reciprocating direction; 1iIJ
a limiter plate that is moved beyond the forward movement range of the head substrate by the ifil motor; A hook is provided between the head board and the limiter plate, and a limiter spring is provided between the limiter plate and the chassis. 7'c is a tape recording/reproducing machine equipped with.