JPS595454A - Tape driving mechanism - Google Patents

Abstract

PURPOSE:To simplify the structure, to decrease the number of parts, and to make a titled mechanism more compact, by using an inverting flywheel as a part of a switchable driving mechanism for quick traversing and rewinding. CONSTITUTION:A belt 30 is extended to a pulley 28 of a driving motor 27, and a capstan flywheel 31 and an inverting flywheel 29 are driven. The inverting flywheel 29 and an intermediate gear 38 are supported so as to be freely rotatable by each prescribed control lever. At the time of quick traversing, the wheel 29 is moved in the direction as indicated with an arrow E by operating the control lever, a gear 35 is engaged with 37 and a winding reel 10 is rotated in the direction FF. At the time of rewinding, the intermediate gear 38 is moved in the direction as indicated with an arrow F by operating the lever, gears 38, 39 and 40 are engaged with each other, and a feed reel 11 is rotated at a high speed in the direction REW. Therefore, the structure is simplified, the number of parts is reduced, and this mechanism can be made more compact.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape drive mechanism, and is particularly suitable for use in a cassette tape type portable tape recorder or tape player.

Portable or pocketable cassette tape recorders or tape players use an anti-rolling mechanism to stabilize tape running during recording or playback. This mechanism includes a reversing flywheel that is connected by a belt that drives the capstan flywheel and rotates in the opposite direction to the capstan flywheel, so that both flywheels are rotated in opposite directions relative to the swinging motion of the tape recorder. It takes advantage of the fact that it generates directional receptivity. Conventionally, a reversing flywheel is supported on a fixed shaft, and driving power is extracted from the reversing flywheel or a capstan flywheel as a switchable tape drive mechanism for fast forwarding or rewinding the tape. An idler or pulley device has been used that can cut and break transmission to the reel shaft or take-up reel shaft. Such a switchable tape drive mechanism for fast forwarding and rewinding has a complicated structure and causes a poor space factor, making it difficult to make a tape recorder or the like more compact.

In view of the problems of the present invention, a reversing flywheel is used as part of a switchable drive mechanism for fast forwarding and rewinding, resulting in a simpler construction, reduced number of parts and improved space factor. More compact? The purpose is to rub.

In the tape drive mechanism of the present invention, the reversing flywheel is pivotally supported by a control lever, etc., and by operating the control lever, the reversing flywheel is fixed to the driving force transmission means such as a gear, which is fixed coaxially with the reversing flywheel, and to the take-up reel shaft. Sai'1. and a driving force transmission means for rapidly forwarding the tape;
In addition, by operating another control lever, the driving force transmitting means of the reversing flywheel shaft and the driving force transmitting means fixed to the supply reel shaft are connected via a driving force reversing means such as a gear to rewind the tape. This is done so that

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

Figure 1 shows a cassette tape storage door to which the present invention is applied. FIG. 3 is a perspective view with a part of 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 rewind button (4), a fast forward button (5), and a microphone (6). These operation buttons (1) to (5)
) is equipped with electrical 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. The cassette has a cassette lid (71
By closing the lid (7), the positioning bin +8) +9) is inserted into the positioning hole of the cassette, and the cassette is set in the play state. At the same time, a take-up reel [I[fl, supply reel U]) and a capstan 02) are inserted into a predetermined position of the cassette.

For example, when the play button (2) is pressed in this state, the recording head (141 and pinch roller a41) are advanced and rotated by the control motor to their respective operating positions, and the capstan motor is further rotated to perform playback. In addition, when the record button (1) is operated, the erasing head (+5) is rotated to its operating position in addition to the above operations.Also, when the rewind button (4) or the fast forward button (5) is operated, When operated, the gear combination is changed so that the power of the motor driving the capstan (121) is directly transmitted to the take-up reel stand or the supply reel stand, thereby rewinding or fast-forwarding the tape.

Figure 2 shows the first tape cassette 07I installed.
It is a top view of the cassette mounting part of a figure. Kasetsu) flγ
) is positioned by the positioning pin (8, (91 and plate)
It is placed on the head substrate 1) which is slidably attached to the magnetic tape plate 1), and the stop mode position (returning position) shown in FIG. ) is reciprocated. The pinch roller (141) is attached to the rotatable chassis (+91) by the pinch roller lever 0 second and the fulcrum pin (c).The erasing head (15) is attached to the erase head lever u9 and its fulcrum pin (c). 67J is rotatably attached to the chassis aω.

FIG. 6 is a plan view showing the tape drive system. As shown in Figure 6, the capstan rod, winding, and supply reel (10
1fl 11 is rotationally driven by a drive motor (27). A bell) (30) is hung on the motor boot 181, and this belt 0 (additionally, the capstan t12
) and a coaxial capstan flywheel 01) and a reversing flywheel (c) are driven. The motor 0θ rotates in the direction of arrow A, which causes the capstan flywheel 0
1) is rotated in the direction of arrow B (counterclockwise), and the inverted flywheel (c) is rotated in the direction of arrow C (clockwise).

Each flywheel (291C1fil) has the same quality and radius, and is rotated in opposite directions to achieve an anti-four-ring effect that stabilizes tape running against the shaking of the entire cassette player. ing.

When the tape is fed at a constant speed in the forward direction (FWD) during playback (PLAY) or recording (REO), the tape is placed between the drive wheel 021 coaxial with the capstan a2 and the take-up reel stand. The idler 〇 is moved in the direction of the arrow and comes into rolling contact with both of them, thereby rotating the take-up reel α0) in the direction of the arrow PLAY/REO, and the tape is wound onto the take-up reel no.

During fast forwarding (F'F), reverse flywheel (2a)
is moved in the direction of arrow E, and this inverted flywheel (29
) is meshed with the gear (37) coaxial with the take-up reel stand OJ, and the take-up reels flO, l are rotated at high speed in the direction of the arrow FF. This causes the tape to advance at high speed.

When rewinding (R, EW), turn the inverted flywheel (29
) and the supply reel 01).
8) is moved in the direction of arrow P, and the inverted flywheel (2
9) and coaxial gear 0! It is meshed with the supply reel (II) and a coaxial gear (40). As a result, the supply reel 11J) is rotated at high speed in the direction of the arrow REW, and the tape is rewound at high speed.

FIG. 4 is a plan view of the head substrate drive mechanism and mode switching mechanism, showing the stop mode positions of each mechanism. FIG. 5 is a plan view showing details of the main parts of the head substrate. M
As shown in Figure 5, the base (20
A guide pin (4υ) is installed in a), and a rectangular notch (4a) formed in this guide pin (4υ and chassis f19)
are slidingly engaged. In addition, the head (20b) of the head board (2ω) is formed with a long side (4 sides), and a long side (4 sides) is formed on the head board (2ω).
4 Ushio and chassis O! The guide bin (4 forces) installed in the ll is in sliding engagement.
1 is the arrow PLAY/REC and S T OP in Fig. 5.
It is supported by the chassis so that it can slide in any direction.

As shown in FIG.
7b).

The head substrate (to) has one end (20d) engaged with the free end (22a) of the pinch roller lever (221), and a pinch pressure spring (48) that biases the pinch roller lever (22I). ) is constantly biased in the forward direction along with the pinch roller α small.On the other hand, the head board (
The tip (20c) of the head (2Db) of the head (20) is connected to a crank pin ('
It is in contact with 1fl. Therefore, during playback or recording, the f&I control motor (4ω causes the crank pin l!i
The mark is approximately ±9 at the REO position or PLAY position in Figure 5.
When rotated within a range of 0°, the head substrate (20) is advanced to the forward movement position.

As a result, the recording/reproducing head a3 is advanced to the tape contact position.

As shown in the plan view of the control motor board in FIG. 6, the crank pin 60) is installed at an eccentric position of the gear 61). Note that a sliding ring (50a) is inserted into the crank bin in order to reduce friction with the tip (20c) of the head board (201).The gear 6υ with the crank pin shaft is an intermediate gear bag and a worm gear 63). Through the motor (
It is driven by a worm (49a) fitted into the shaft of 4a).

As shown in FIG. 4, the head board c! A limiter plate 6a is arranged on the back side of the head substrate (20) and is slidably engaged with the head substrate (20) and reciprocated together with the crank pin (5). , the horn is connected to the head substrate C? through a spring, and has a function of absorbing the overrun of the crank pin acid and holding the head substrate (2 (↓) in its forward movement position with a constant spring tension. have.

Figure 7 is this Rintsuta board I! 5I) is a plan view showing details of FIG. Guide pins (55a x 56b) are implanted in the base (20a) and head (20b) of the head substrate (2(υ), and these guide pins (56a) (56b) are formed on the limiter plate et al. Long hole (55a) (55b)
is slidingly engaged with. The arm portion (54) of the limiter plate 64)
a) and the head board (20) with a beam mitter spring 68.
) is applied, so that the limiter plate 4) is always biased in the direction of the backward movement of the head base plate. Also, the pin (59) implanted in the arm (54a) and chassis a9)
) is provided with a load canceling spring. This canceling spring ff1 (1) is connected to the head board (2) as described later.
It has the effect of reducing the force of the pinch pressure spring (48) applied to ω, thereby reducing the load on the control motor (49).

The head (54b) of limiter plate 4) has a U-shaped hook portion (M'c) (54) that engages with the crank pin (50).
d) is formed. When the crank pin is moved to the R, EO, tM, or PLAY positions in Fig. 7 during recording or playback, the limiter plate 5 will move to the head board (2 (J)).
and is moved in the forward direction.

FIG. 8 is a plan view showing the reciprocating shape of the head substrate (2+) and limiter plate a. Head board (2ii is the 5th
When in the backward movement position in the figure, the head substrate (20) is biased in the forward movement direction by the pinch pressure spring (48) as described above. and crank bin 60) clockwise (
pLA-Y)t or counterclockwise (REO) rotation, 1) of the head board and limiter plate is moved forward,
It also moves back when stopped. At this time, the head board' (
The force in the opposite direction to the force of the pinch pressure spring (48) applied to the crank pin 6ω via 2(i+) is applied to the limiter plate 641.
and the chassis (19).
Q) The head board + 201 guide bin (56a)
(56b) to the head group 87. Similarly, the kite bin (56a) (56) of the head board (20)
b) is applied to the limiter plate 6 by the pinch pressure spring (4F, which cancels the above force). As a result, the lateral pressure of the head board (201 and limiter plate 6υ) applied as a load to the crank pin 6111 becomes extremely small during forward and backward movement, making it easy to control the head board QJ even with a small and low torque control motor (49). It is possible to make Oenoki.

Furthermore, since the head board (20) and the limiter plate a are moved integrally by the rank pin 60), the head board (20) and the limiter plate a are stretched between the head board (20) and the limiter board 6a, and the limiter spring 68) is moved by the motor (4ω). It does not become a burden.

When the head board holder advances a certain distance in the forward movement direction, the pinch roller (14) comes into contact with the capstan 02) as shown in FIG. In this state, the pinch roller lever (22)
is separated from the head board (20), and the pinch pressure spring (48)
The pressing force caused by this will be eliminated. Therefore, after that, the limiter plate 6a, which is moved forward by the crank pin shaft, will pull the head board (2(v) in the forward movement direction via the limiter spring. At this time, the load applied to the crank pin is Although the tension of the counteracting spring (6 (1)) is easily applied, the moment of the crankbin (5) is
Therefore, the control motor (491) will not be overloaded.

Head board (2 (guide pin (41) implanted in IJ)
However, as shown in Fig. 8, when it comes into contact with the kite notch (42a) of the chassis a91, the forward movement position of the head board and υ is determined.On the other hand, the limiter plate 6 reaches a point in Fig. 8 It is further advanced from the position indicated by the chain line (54X) to the position indicated by the solid line.

The head substrate @ is held in its forward movement position by the tension of the limiter spring 8) generated at this time.

crankbin 60) again, % (PLAY) i or record (
When the control motor (49) returns from the REo) position to the stop mode position, the canceling spring (60) and the limiter spring 8) each pull the limiter plate 64) in the direction of the return movement of the crank pin 60). The starting torque may be small. In addition, the force required to resist the pinch pressure spring (48) during the backward movement of the head board (20) is subtracted by the canceling spring (60) as in the forward movement, and
The load on ω is significantly reduced.

The arm portion (20e) of the head substrate 1υ is engaged with the bent portion (62a) of the idler lever (62a), which holds the idler (04) rotatably with its axis oriented as shown in FIG. . This idler lever (64 is a support shaft mounted on the chassis aω) is rotatably supported, and biased clockwise by a spring (.1).

When the head board (lu) moves forward to the forward position, the arm part (20e) of the head board disengages from the bent part (62a) of the idler lever (64), and the idler lever (64) disengages.
2) rotates clockwise. This allows the idler (
is frictionally engaged with the capstan (driving wheel 02 coaxial with 121) and the take-up reel stand OJ, and the take-up reel 00
) is rotated in the tape winding direction.

FIG. 9 shows the operating state of the main parts in the reproducing state, and FIG. 10 is a side view of the capstan and take-up reel portion as seen from the direction of arrow 0 in FIG. During playback, the control motor (49
), the crank pin 60) is rotated approximately 90 degrees clockwise, and as explained in FIG. Also, pinch 4-ra (+41 is capstan (
It is crimped to 12 knots and the tape is run.

In addition, as shown in Fig. 10, the idler 〇
31, the take-up reel gtll is rotated in the direction of arrow PLAY in FIG. 9, and the tape is wound up. Note that since this regeneration mode or other operating modes are switched by the control motor and worm gear system, there is no need for a device to lock the drive mechanism in each mode. The worm gear system has a crank pin face unless the control motor operates))
This is because it is not driven by the load.

Next, the recording mode (RBO) will be explained. In this mode, the forward movement of the head substrate (20) and the drive of the take-up reel are the same as in the reproduction mode. As shown in FIG. 4, a recording lever (6 levers) is arranged between the head substrate (20) and the chassis discharger, and in the recording mode, this recording lever moves the erasing head (15) and the recording/reproducing switch ( 7fl) is operated.

FIG. 11 is a plan view showing details of the recording lever (65) in the stop mode position. The recording lever ω is rotatably supported by a support shaft (67) installed in the chassis A [Co., Ltd.], and the drive side thereof has a cam part (
65a) is formed. The cam part (65a) has a curved part (65b) and a straight part (65c), and the curved part (S5
b) has the same radius as the maximum turning radius of the crank pin 60). Therefore, when the crank bin 15Q) is rotated clockwise during reproduction, the recording lever is not operated. Also, when the crank pin (501) is rotated counterclockwise during recording, the straight part (S5c) of the cam part (S5a) is pushed by the crank pin e50), and the recording lever part 5) is rotated clockwise. be moved.

The working end (65d) of the recording lever (65) is engaged with the working pin (25a) of the erasing lever (c) that rotatably supports the erasing head (i5).
In the stop mode, as shown in FIG. 1, the erase head (15) is pivoted to a non-active position. This working pin (25
A spring (68) is hung between the recording lever (651) and a bent portion (65e) formed at the tip (65d) of the recording lever (651).

In addition, a claw part is attached to the active side of the recording lever, and this claw part engages with the knob (71) of the recording/reproduction switch (70) fixed to the circuit board (not shown). are combined.

FIG. 12 shows the operation of the recording lever in the recording mode. As explained in FIG. 8, during recording, the control motor (49) rotates the crank pin 6 (J) approximately 90 degrees counterclockwise to advance the head board to the forward position, and the idler The take-up reel aO) is rotated (9) in the winding direction via (34). At the same time, the recording lever (65) is rotated clockwise around the support shaft η by the crank pin 150). As a result, the tip (65d) of the recording lever part 5) and the erasing lever (
C) is disengaged from the action pin (25a), and the erase head lever lever ω is pulled by the spring (681) and rotated clockwise.The erase head lever is inside the chassis fi9.
The erasing head a9 is held in the operating position shown in FIG. 12 by the tension of a spring (681).

In addition, the knob (71) of the recording lever (at the operating position 139 in FIG. 12, the recording/reproducing selector switch σ0) is slid to the recording side by the claw portion 0Y attached like a recording lever, and the recording circuit is in the operating state. become.

When moving back from the recording mode to the stop mode, the full end (2Of) of the head board (2+++) is engaged with the working pin (25a) of the erase lever (c), and the head board C'0) is moved back. At the same time, the erase head lever (c) is pushed back.

Further, the recording lever (65) is moved counterclockwise by the return movement of the crank pin to the stop mode position, thereby switching the knob συ of the recording/reproducing switch (7 (11) to the reproduction side.

Next, to explain the fast-forward mode, in this mode, as explained in Fig. 3, the reversing flywheel (C) and the coaxial gear (G) are meshed with the take-up reel coupling (2) and the coaxial gear (07), and the winding The take-up reel (10) is rotated at high speed in the take-up direction. As shown in FIG. 4, the reversing flywheel 09) is rotatably supported by the fast-forwarding lever υ2, and the above-mentioned gears (351 and 07) are connected by this fast-forwarding lever σ.

FIG. 13 is a plan view showing details of a part of the fast-forwarding lever, and the first
4 is a plan view of the operating state, and FIG. 15 is a partial side view as seen from the direction of arrow 0 in FIG. 14. Figures 13 and 15
As shown in the figure, the fast forward lever (72) is
) is rotatably supported on the support shaft (socket), and the operating end of this lever is connected to the reversing flywheel (
C) is rotatably mounted. Rapid feed lever σ2
An arcuate edge (72b) is formed at the drive end (72a) of the fast forward lever (721), and this edge (72b) is engaged with the second crank pin (72a). A spring 6nI is hooked between the bent part (72c) formed in the chassis A and the bottle (/(it) that is planted on the bottom of the chassis a, and the fast-forwarding lever ( 72) is biased to rotate counterclockwise.

The second crankbin (75) is moved in a circular arc back and forth by a second control motor 68) shown in FIGS. 4 and 6, thereby switching the fast forward (Fl and rewind REV) gears. be exposed. The state in which the crank pin aω has been rotated approximately 90 degrees clockwise from the stop mode position shown in Fig. 4 is the fast forward mode, and the state in which the crank pin aω has been rotated approximately 90 degrees counterclockwise from the stop mode position 1a by 11 degrees t. is in rewind mode.

As shown in the detailed diagram of the control motor board in FIG. 6, the crank pin σ is eccentrically attached to the gear σ9), and this gear C19) is connected to the control motor (78) via the intermediate gear and the worm gear (81j). ) fitted into the shaft of the worm (7
8a).

As shown in Fig. 14, when the crank pin (751) is rotated clockwise to the fast feed position t (Ff'), the locking part (72d) of the fast feed lever comes into contact with the bin (76). , the rapid traverse lever (72 is rotated counterclockwise by the direction of the spring. In this state, as shown in Figs. 14 and 15, the gear 05 coaxial with the reversing flywheel)
is meshed with the take-up reel (1 [gear 07 coaxial with l), and the take-up reel (10, 1) is rotated at high speed in the direction of arrow FF in FIG. 14 to rapidly feed the tape.

In the rewind mode, the crank pin (751) is rotated to the rewind mode position (REW) in FIG. , so the fast-forward lever υold is not activated.

Next, explaining the rewinding mode, in this mode, as explained in Fig. 3, the intermediate gear shaft) is connected to the reversing flywheel (29) and the coaxial gear 09)
It meshes with the coaxial gear (4). This intermediate gear (
Figure 16 is a plan view showing details of the rewind lever. ,
FIG. 17 is a plan view of the operating state, and FIG. 18 is a partial side view as seen from the direction of the arrow 1 in FIG. 17. Figure 16,
As shown in FIG. 18, the rewind lever () if, l is rotatably supported on a support shaft (c) installed in the chassis a0, and a shaft (86) is attached to the active end of this lever. via fil
l A gear (38) is rotatably mounted. An arcuate edge (84b) is formed on the 11 drive end (84a) of the rewind lever (8υ), and this edge (84b) is engaged with the aforementioned second crank pin (7■). The rewinding lever (the bent part (84c) formed on the 8-angle drive end (84a) and the bottle (
A spring (c) is hooked between the rewind lever (84) and the rewind lever (84) in the counterclockwise direction by the tension of the spring.

As shown in FIG. 17, when the crank pin (79) is rotated counterclockwise to the rewind position (1i (REW)), the rewind lever (84) locking portion (84d) is inserted into the chassis 01. The rewind lever is rotated counterclockwise by the spring (881) until it comes into contact with the stopper pin that has been rotated. In this state, the intermediate gears are reversed as shown in Figures 17 and 18. Gear C coaxial with flywheel (291)
! l) and the gear (401) coaxial with the supply reel Uυ.Therefore, the supply reel (+1) is rotated at high speed in the direction of the arrow REW in FIG. 17, and the tape is rewound. Sometimes, the crank pin (75) is rotated to the fast forward mode position (FIi') in FIG. 16, but since the crank pin υ9 is rotated along the arcuate edge (84b) of the rewind lever (8I), The rewind lever (rewind lever) is not activated.

Next, playback cue (fast forward) and review (rewind)
I will explain about it. These modes are activated when the rewind button (4) or the fast forward button (5) in FIG. 1 is operated during playback. When these buttons (4) or (5) are operated, the control motor (49) operates, and the crank pin F50) returns from the forward mode position (PLAY) in Fig. 9 to the stop position. It is rotated again to the return mode position.

Along with this, the head board (2) is moved back once and then moved forward again. At this time, the stop lever (2) shown in FIG.
9B acts, and the forward movement of the head substrate is stopped in the middle of forward movement. Next, in this state, the control motor (781) is operated, and the mode is switched to the fast forward mode shown in FIG. 14 or the rewind mode shown in FIG. 17, and cueing or review is performed.

As shown in Figure 4ζ, the stop lever 0υ is located at the chassis α.
Spring a3J is rotatably supported by a support shaft (921) installed in 9) and stretched between the chassis a!1)
It is urged to rotate counterclockwise by . The working end (91a) of the stop lever (91) has a stop pin (94) that engages with the arm (20e) of the head board copy υ.
is fixed. In addition, a solenoid (a piece of iron (9fi+) that is attracted by a solenoid) is fixed to the operating end (91b) of the stop lever (9j). During re-forwarding or C recording, the solenoid (95) is not energized, so the head When the board (20) moves forward, the slanted edge (20g) of its arm (20e) hits the stop bin of the stop lever (91), and the stop lever (9j)
The playback mode is released clockwise as shown in the figure.

Therefore, the forward movement of the head substrate (2ff+) is not blocked midway.

FIGS. 19 and 20 are plan views showing the queue and review mode, respectively. In these modes, as mentioned above, the head board once retreats and moves forward again, but at this time, the solenoid is energized, and the iron piece ωG attached to the operating end (91b) of the stop lever ()'υ )
is adsorbed. For this reason, the head board (mirror arm part (20e)
) is formed on the inclined edge (20g) of the head substrate (2o), thereby preventing the head substrate (2o) from moving forward as shown in FIG. 19 or FIG. 20. In this state, the pinch μ-ra Q41 is not pressed against the capstan (12+). Also, the limiter plate 6 slides relative to the head board (201) and advances independently to the forward position. Therefore, the crank pin 60 No additional load will be applied.

In this state, the control motor (18) is then driven to move the crank pin σ9 to the fast forward mode position (F
F') or the rewind mode position (1
1, EW), the tape is fast-forwarded or rewound in the same manner as in FIG. 14 or 17, and cueing or review is performed.

If you operate the play button (23) again during cue or review, the solenoid will be turned off.Then, the stop lever (9J) will be in a state where it can move at the same time. It slides off the inclined edge (20g) and the head board f2fl) is advanced to the forward movement position shown in Fig. 9. At the same time, the control motor (
78) is operated, the crank pin (?ω) returns to the stop mode position, and the chive drive system returns to the regeneration mode.

Note that by adjusting the mounting position of the solenoid (95) on the chassis 0.9), the amount of protrusion of the head (13) during cue and review can be adjusted. That is, the contact position of the stop bin (94) with respect to the inclined edge (20g) formed on the arm part (20e) of the head board (2fj+) changes depending on the mounting position of the solenoid cap 95. ) protrusion amount can be changed.

Next, FIG. 21 is a schematic plan view showing the main parts of the tape drive system.
FIG. 22 is a schematic cross-sectional view taken along the 0-@ line in FIG. 21. As mentioned above, in the cassette recorder of this embodiment, the anti-rolling effect is obtained by using the capstan flywheel 0 and the inverted flywheel (manufactured by Co., Ltd.). In addition, the reversing flywheel 0υ is coaxially equipped with a gear C+51O, and these are coaxial with the winding wheel IJO).
Alternatively, it is configured to mesh with an intermediate gear (381) to perform fast forwarding or rewinding. This is extremely advantageous in terms of space factor and number of parts, and is a structure suitable for compactness.

To explain this in comparison with the schematic plan view of a conventional tape drive system shown in FIG. An inverted flywheel (101) was placed between the foils (marked 9), and a part of its surface was in contact with the belt.
1) The shaft is fixed, and for rapid feed, the take-up reel,
A pulley (103) is pressed against and separated from fi (102).
) and inverted flywheel (ioi) pulley (104)
Another belt (105) is passed between the belt and the reel, and an idler (106) is connected between the reversing flywheel (ioi) and the supply reel stand C107) for rewinding. They were placed so that they were spaced apart.

On the other hand, in this embodiment, as shown in FIG.
Bell) (301) is wrapped around a part of the surface of the capstan flywheel Oυ between the inverted flywheel (c) and the inverted flywheel (c).This structure shows that the position of the inverted flywheel (29) is There is a free counterfeit, and as in the example, the reversing flywheel (2ω is made movable by attaching the fast forward lever A and l, and the gear C35 is attached to the flywheel).
c39), it is possible to perform rapid traverse operation by gear coupling without using the IJ-IJ-(103) as shown in Fig. 23. Therefore, the structure is extremely simple and the space factor is also good. Become.

In addition, as in this embodiment shown in FIG. 21, if the winding angle of the belt (3Cj) around the capstan flywheel C31 is 90° or less, the flywheel (3υ and bell) 13
The frictional force between the motor body and the flywheel 01) decreases, causing slippage between the two, and the driving force of the motor body 01) may not be reliably transmitted to the flywheel 01). In this case, the rotational speed of the flywheel 01 changes due to slight fluctuations in the load torque while the tape is running, making the tape running unstable and worsening wow and flutter.

For this reason, as shown in Fig. 22, when the angle of the contact side of the bell) 00) (square belt) is 90°, the opening angle of the V groove (29a) of the inverted flywheel (79) is approximately 90°, On the other hand, the capstan flywheel 0υ V groove (31
The opening angle in a) is approximately 70°. this? Therefore, the V-groove of the capstan flywheel 01) improves the bite of the belt 3 (υ) against the ia), and even if the belt winding angle is small, the driving force of the flywheel 01 can be increased. , it is possible to prevent slips and reduce wow and flutter.

Next, detection and control of the rotational position of the crank bin 60)aω shown in FIG. M6 will be described. Figure 24 is 0 of Figure 6.
Fig. 25 is a sectional view taken along the line -■, and Fig. 25 shows the crank bin 6 (
FIG. 1) is a bottom view of the gear with υ; As shown in FIG. 24, the final stage gear 6υ is rotatably supported by a shaft (109) implanted in the control motor board (108), and a crank pin shaft is attached to the boss (51a) at an eccentric position. Furthermore, a sliding ring (50a) is fitted into the bin 6ω. As shown in FIG. 28, a contact member (110) made of phosphor bronze or the like is fixed to the bottom surface of the six gears, and includes three brushes (110a) to (110c).

The substrate (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 for the motor (49) (7g).

On the surface of the resin layer, there is a contact pattern copper foil (111) for detecting the rotational position of the crank pin 60) and the σ clause (each contact).
No-turn output lead wires, motor power lines, etc. are printed and wired.

Figure 26 shows the copper contact pattern formed on the control motor board (iOS). ^(111) is a partial plan view showing the main part. The contact pattern copper foil (111) includes a common ground pattern (112X113) and an output cover turn (114A).
) to (114B), and the shaft (10
A common ground pattern (112) and output f-turns (114A) to (1140) are arranged concentrically with respect to 9), and a common ground pattern (112) is arranged concentrically with respect to the shaft (115) of the gear (79). 113) and exit cover turn (1
144)) (114B) are arranged.

The common grounding pattern (112) is the stop mode position (STOP) and play mode position (PLAY) of the crank pin shaft.
and position detection contact/f turn (1120) corresponding to the husband of the recording mode position (REO) -8TOP, (1
12A) -PLAY, (112B) -REO, and the common ground pattern (i13) is the stop mode position (S T OP ), fast forward mode position (FF) and rewind mode position (REW) of the crank pin aω. Corresponding position detection contact pattern (1130)-8
TOP.

(113D)-FF' and (113E)-REW. The positions of the contact members on the back surface of the gear (79) are set so that each stop position of the rank bin (7!) corresponds to the mechanical position of the contact patterns (1130) to ('113E).

Common to Figure 25 - Mi: Ground pattern (112X113)
When the potential of is set to logic "0", the output codes (A to E) of the output patterns (114A) to (114E) at each detection angle position are as shown in the table below.

(Continued on next page.) Next, FIG. 27 shows a control circuit diagram of the control motor (49) ff81 and the drive motor (27). Figures 24 to 26
The structure of the position detection switch shown in the figure is equivalent to the switch circuit (117X118) shown in FIG. on the contact side, and on the fixed contact side, PI, AY, 5TOP, ](
It can be thought of as a changeover switch provided with contact patterns of EC, 1, 1, 5TOP, 11, and EW, respectively.

The output codes A-E shown in the table above are the rotation angles of each contact pattern (contact pattern (112A) to (+12A) in Fig. 25).
c) and (1130) to (113B)), and %+lJr+tl logic r c (119
).

The control logic IO (119) operates using the operation keys (
According to the inputs of U to (5) and position detection codes A to E,
When the key is operated, the position of crank pin G5 (v (7~) is determined, and then the control motor (49) or σ mallet is driven (
When the desired rotation position is detected (forward rotation or reverse rotation), the control signal S is sent to stop the control motor (49) or (7 hammer).

Generate S2. In addition, these control motors (49) (
In synchronization with the stop of 78J, the capstan drive motor (
A signal S3 for driving 2t1 is supplied to the servo circuit (120).

Control logic IO (119) control signal 4 also energizes solenoid (95) during cue or review.

Note that the switch (lII) inserted into the ground line (121) in FIG. 27 is connected to the cassette lid (7) as shown in FIG.
) is turned on and off in conjunction with the opening/closing operation of the cassette lid (
7) is configured so that the switch (16J) is turned on and the control logic 0 (119) is energized only when the cassette lid (7) is opened. Since the eye switch IO (119) does not operate, even if the operation buttons (il~(5)) are erroneously operated, the tape running system and mode switching mechanism will not be activated.
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. Since the tape recorder of this embodiment is used continuously with a built-in battery, in order to prevent voltage reduction, the control motor (19) (19) and the capstan drive motor (2η) should not be operated at the same time. Before the playback mode, there is a
Control signal S as shown in the figure.

is generated from the crank pin 6i11j and the control motor (1ω rotates forward).
rotates clockwise to enter pJ raw mode. Next, a control signal S3 is generated, and the drive motor (2γ) is driven to perform a regeneration operation. From play mode to stop mode ζ
When returning, first turn on the drive motor (2) as shown in Figure 27.
After 71 is stopped, the control motor (i) is reversed,
When the crank pin (51+1 or 1) is returned to the positive mode position. In the recording mode, the control motor (49J) is rotated in the opposite direction from the playback mode, as shown by the dotted line at No. 28. be exposed.

In the fast-forward mode, as shown in FIG. 28B, the motor (78) is first rotated in the forward direction by the control signal S2, and the crank pin (7) rotates clockwise to enter the fast-forward mode. ) operates to fast-forward the tape. When returning from fast-forward mode to stop mode, the drive motor (2''I) is stopped and then the control motor (78
) is reversed, and the crank pin (7) is returned to the stop mode position.Before the rewind mode, the forward and reverse rotation of the control motor (78) is reversed from the fast forward mode, as shown by the dotted line in FIG. This is done.

For cue or review during playback mode, the second
As shown in Figure 8C, the control motor (4; Then, the control motor (4W) rotates forward, and the head board (2o) is set to the cue and review positions.Next, the control motor (KJS2) rotates the control motor (4W) forward (when in cue). Or, the drive motor (2't) is turned on and the cue or review is performed after being reversed (reading the review) and entering the fast forward or backward mode.When returning to the playback mode, as shown in Figure 28C. First, the drive motor is turned off and the solenoid (95) is turned off to return the head board 12 (lj) to the playback mode position (forward movement state). The crank pin is rotated forward and returned to the stop mode position.Next, the drive motor 07 is turned on, and the regeneration operation is performed again.

In this way, when switching between each mode, the control motor (49) f
f8) and the drive motor 0θ are not moved w1 at the same time, and even a built-in battery of ff3V can be operated satisfactorily.

In the above example, for fast forwarding and rewinding, gears cle(, qq), (3L
(A rewind lever (8-V with several gears) is used as a rewinding means for attaching the 4al and rewinding gears, but these can be replaced with idlers and friction wheels.

As described above, the present invention attaches the reversing flywheel to the first lever mechanism (the fast-forward lever (7) in the embodiment), and operates the fast-forwarding lever υ2 to rotate the reversing flywheel (
29), the driving force transmitting means (gear c3ω in the example) attached coaxially with the driving force transmitting means (gear (32) in the example) identified on the take-up reel shaft are combined (meshed) to produce a tape. The second lever mechanism (driving force reversing means (intermediate gear (3g) of the example) attached to the rewinding lever (8=IJ) of the example) is connected to the driving force transmitting means (of the reversing flywheel shaft). The gear 09) of the embodiment) and the driving force transmission means (gear 40 of the embodiment) attached to the supply reel shaft
) to perform tape rewinding.

Therefore, according to the present invention, the anti-rolling effect is achieved by the reversing flywheel, and the number of parts is reduced because the reversing flywheel is used as part of the switchable tape drive 41z structure for fast forwarding and rewinding the tape. It also improves the space factor and allows a very compact tape recorder or tape player to be constructed.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cassette tape recorder to which the present invention is applied with the cassette lid opened, FIG. 2 is a plan view of the cassette loading section of FIG. 1 with a cassette tape loaded, and FIG. FIG. 4 is a plan view showing the head board drive mechanism and mode switching mechanism; FIG. 5 is a plan view showing the head board in FIG. 4; FIG. 6 is a plan view showing the control motor and worm gear section. A top view of the control motor board showing the
The MZ diagram is a plan view of the limiter plate in FIG. 4, FIG. 8 is a plan view showing the forward movement state of the head board and limiter plate, FIG. 9 is a plan view showing the operating state of the suction part in the regeneration state, and FIG. The figure shows the side view of the capstan group and take-up reel section as seen from the arrow [phase] in Figure 9, Figure 11 is a plan view of the recording lever in the stop mode position, and Figure 12 shows the recording lever in the recording mode position. The plan view shown in FIG. 16 is a plan view of a part of the fast-forwarding lever, and FIG.
Figure 17 is a plan view showing the operation of the return lever, Figure 18 is a 114II view of the main part as seen from the direction of arrow 0 in Figure 17, Figure 19 is 21 is a plan view showing the operation of each part in the cue mode, FIG. 21 is a plan view showing the operation of each part in the review mode, FIG. 21 is a schematic plan view showing the main parts of the tape drive system shown in FIG. 3, Fig. 22 is a sectional view taken along the O-@ line in Fig. 21, and Fig. 23 is a tape drive! A schematic plan view showing a conventional example of the hh system, Fig. 24 is a sectional view taken along the ■-[phase] line in Fig. 6, Fig. 25 is a bottom view of a gear equipped with a crank pin, and Fig. 26 is a control diagram. A partial plan view showing the main parts of the contact pattern steel foil formed on the motor board, Figure 27 is a control circuit diagram of the control motor and drive motor, and Figure 28 is the open side 1 motor and the caps sliding motor. This is an operation time chart. In addition, in the symbols used in the drawings, Qtll...
・・・・・・・・・・・・Take-up reel aυ・・・・・・
・・・・・・・・・・Supply reel A Enoki・・Song・・・・Song・Capstan A iron・・・・・・・・・・・・・・・・Recording/playback header wholesale・
......Four...Reversed flywheel G30)...
・・・・・・・・・・・・Belt (3J)・・・・・・
・・・・・・・・・Cab stun fly boil C35
f37) (3 Hama,.l......Gear CI&)・
・・・・・・・・・・・・・・・Intermediate gear 02)・・・・
・・・・・・・・・・・・Fast forward lever (8 levers)
・・・・・・・・・・・・Rewind lever. Agent Masaru Ueya Yoshio Tsune
Toshiki Sugiura (Instruction Procedure Amendment (
Method) 1. Display of the case 1982 Patent Application No. 11372. Ri No. 2,! lAO'''-$ Cape Drive + @ Structure 3 Relationship with the case of the person making the amendment Patent applicant: Tokyo Parts Co., Ltd. 6-7 No. A (2,18) Sony Corporation 6□ Increased number of inventions due to the amendment Number 7 - Target of amendment Column for brief explanation of drawings in the specification Pem...Screen (1), ``Figure 21'' in line 6 of Section 68 of the specification will be corrected to ``Figure 20''. (2) We will supplement the original copies of the drawings as shown in the attached sheet. −1 or more

Claims (1)

[Claims] A capstan flywheel mounted coaxially with the capstan, an inverted flywheel that is connected to this capstan flywheel by a belt and rotates in the opposite direction to the capstan flywheel, and supports the shaft of this inverted flywheel. a first lever mechanism that is supported by a second lever mechanism, a driving force transmitting means attached to each of a supply reel shaft, a take-up reel shaft, and the above-mentioned reversing flywheel shaft; a driving force reversing means interposed between the supply reel shaft and the driving force transmitting means, the first lever mechanism is actuated to reverse the reversal between the flywheel shaft and the take-up reel shaft during tape rapid forwarding; At the same time as coupling the driving force transmitting means, when rewinding the tape, the second lever mechanism is actuated to couple the driving force transmitting means of the reversing flywheel shaft and the supply reel shaft via the driving force reversing means. A tape drive configured as follows.