JPS5819763A - magnetic recording and reproducing device - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing apparatus, and more particularly to a magnetic recording and reproducing apparatus to which tape cassettes of different sizes and shapes can be attached.

Depending on the application, the product V'I' IT for outdoor use is divided into stationary VTRs that use large tape cassettes with many magnetic tape wrappers for long-time recording or playback, and An idea is to use a small tape cassette that is small and lightweight and has a relatively small amount of magnetic tape wound therein so as to be convenient for portable use. In this case, the two VTILs naturally have different configurations such as the spacing between reel stands (reel axes), and the tape cassettes used for both differ in not only the reel spacing but also the external dimensions, making it difficult to compatibility between the two. It was difficult to hold back.

In view of these points, the present invention is designed to prevent the possibility that, when the recording format of the magnetic tape is the same for both a stationary VTR and a hand-held V'rit, the dimensions and shapes of the tape cassettes used for both V'rits may differ. However, in order to make it possible to use both tape cassettes in combination, in pre-preparation v 'i' The present invention provides a magnetic recording and reproducing device in which C is moved without changing.

The configuration of the present invention will be explained below based on the drawings showing one embodiment thereof. In Figures 1 and 2, (1) is a short-time recording/playback cassette (hereinafter referred to as a small cassette) that rotatably stores small reels (2a) and (2b), (la) (8
b) shows the pin (4a) (
4b) is a rotating post rotatably held.

(5) is a long-time recording and playback cassette (hereinafter referred to as large cassette) that rotatably stores dog reels (6a) and (6b);
7a) (7b) are the pins (
8a) (8b) is rotatably held and is a rotating post.

(9a) and (9b) are reel drive claws 0 that engage the small reels (2a) and (2b) and the dog reels (6a) and (6b).
oa) (1ob) (10e) and (111~) (ttb)
(ttc) with the reel stand (9IL) (
91'l) is rotatable around reel shafts (18a) (18b) implanted in reel table moving boards (12a) (12b). (14) (14b) is the brake Ii installed on the reel table moving board (12a) (121).
i (15a) (15b)"k A brake lever that can be rotated around the center, and the brake lever (14a) (14b)
brakes the rotation of the reel stands (9a) (9b) by contacting the reel stands (9a) (9b).

The play cutters (14a) and (14b) are pins (1) implanted in the reel table moving board (12a) (121)
6a) A spring (17a) with one end hooked to (16b)
(17b) is biased in the directions of arrows A and B.

H is a tension lever that can be rotated around a pin embedded in the substrate 09), and the tension lever (one frame has one end attached to a tension post (21) that abuts the magnetic tape (21)).
), and the free end of the tension band (c) is hooked to the other end with a pin to rotatably hold the tension band (c). The tension lever θ field C is biased clockwise by a spring (B) whose one end is hooked to a pin (C) planted on the substrate (1@).Other than the tension band (C) The end is fixed to a tension band fixing plate (b) attached to the reel table moving board (12a).
The tape tension is mechanically controlled by the barrel, tension pan)'t231 and U')-ru stand (9a).

The reel table moving substrates (12a) (12b) are substrates (
The reel table moving shafts (28a) (28b) installed in
) (Fig. 5). (2
9a) (29b) is the pin (8) implanted in the board (1g).
0a) (Bob), and is a spring that urges the reel stand moving board (12a) (12b) in the direction of arrow C2D.
a) (2g l)) is waiting in a position where it can be held in the small cassettes (2a) and (2b) of 11 (Fig. 1). (8ta) (glb) has one end Via implanted in the reel table moving base & (12a) (12b)
(82a) and (82b), and the wires (81a and 81b) have the other ends connected to the cassette detection plate (
88a) is fixed to 1.98b), and the pins (84a) (a4b) are implanted in the substrate a in the middle.
Rollers (85a) (85b) held rotatably
are guided by. The cassette detection plate (88a) (a
ab) is vinyl implanted on substrate 01, y (a6a) (
It has long holes (87a), (87b), (87e), and (8N) that can be slid into the large cassette (6) as shown in Figure 2. When the wire (81a) (8
1b) Rotate the reel table moving board (12a) clockwise around the reel 8 moving axis (28a) through k, and move the reel table moving board (12+) to the reel table moving axis (28b). Move counterclockwise to the center. Therefore, the reel stand (9a) (911) has a large cassette (51
Move to a position (Fig. 2) where it can be locked to the 0 large reel (6&) (6b).

Next, in Figure g8 and Figure 4, the brake release levers (38a) (88El) are rotatable around the bins (89a) (89b) installed on the base plate (I91).The brake lever (14a) ) (14b) force point pi y (
51a) (51b) are brake release levers (88a) (
When the brake lever (14N (14b) is rotated by the springs (17a) and (17b) in the inward direction and the B direction, the brake release lever (18a) (89a) as a fulcrum, and the brake release lever (88b) is biased clockwise using the bottle (89b) as a fulcrum.The reel drive idler (g) is implanted in the idler lever 11). It is rotatably held by the idler shaft (6),
The idler lever (b) is rotatably held on the idler operating lever (t) about the pin (to). The idler actuating lever μs is rotated about the bottle (G) by a spring 00 whose one end is hooked to a bottle (goods) planted on the substrate 0 carrier, and the reel driving idler (T) is moved toward the motor pulley θη side. Forced to move. The motor pulley (B) is attached to the motor shaft QI of the motor attached to the board (19), and the reel drive idler (G) rotates the motor when it is pressed against the motor pulley Qη. Depending on the direction, the supply reel stand (9
The supply reel is moved to either the a) or take-up reel stand (9b) side, and the driving force of the motor is applied by the automatic biting force of the reel drive idler (7) and the urging force of the spring). It is transmitted to the stand (9a) or the take-up reel stand (9b). The wheel is a release roller that releases the brake and reel drive, and the release roller is a brake release gear □□□
It is rotatably held by a fixed pin.

The brake release gear is rotatably held by a brake release gear shaft i51 installed in the sleeve vJ base.

- is a worm gear, the worm gear M is attached to the motor shaft, and rotates the brake release gear with the rotation of the motor. The motor is mounted on an auxiliary board attached to the board. The release roller wheel is rotated counterclockwise around the idler operating lever 13 by the rotation of the brake release gear 6η, and the release roller wheel is rotated counterclockwise around the idler operating lever 13 by the rotation of the brake release gear 6η. ) or the take-up reel stand (9b) is released. At the same time, the brake release lever (88B)
) can be rotated counterclockwise around the pin (a9a), and the brake release lever (88b) can be rotated clockwise around the pin (89b), so that the force point of the brake lever 04a) (t4b) Pin (51a) (51b
) is released, and the brake lever (t4a) (14b)
The springs (17a) and (17b) press against the reel stands (9a) and (9b) by the biasing forces in the entry direction and the B direction, respectively. The pin slope of the tension lever 019 and the brake levers (14a) (14b) and the lever pins (51a) (
511)) is co-centered or approximately co-centered with the reel movement axes (28a) (28b) of the reel stand (9+1) (9b) during recording and playback of the magnetic tape c2υ, as shown in FIG. It is configured so that In addition, in Fig. 8, a line segment passing through the bin □□□ that allows the tension lever rJS+ to rotate and the bin (goods) that hooks the free end of the tension lever θ hinoki and the tension band (c) is drawn. P-P, orthogonal to line segment 1'-P, bin F241
The line segment passing through is Q-Q, and when the reel stand (9a) is in the small cassette (11 position (Fig. 1)), the tension band ) and the line segment Q-Q is the angle θ,
When the reel stand (9a) is in the position of the 7% large cassette (5) (Fig. 2), the line connecting the tension band (2) from the reel stand (9a) to the bottle (goods) and the line segment Q- When the angle formed with Q is 02, the angle θ and the angle θ are configured to be equal to each other. With this configuration, the reel stands (9a) (9b) can move,
Regardless of whether the small cassette il+ or the dog cassette (5) is used, the conditions for tape tension control are kept unchanged without changing the length of the tension band (2). Furthermore, the brake lever (14
a) (141)), the reel stand (9a) (91
The relationship between the gap fI,,H,, and J) hardly changes.

The magnetic tape 0 is a small reel (2a) or a thick reel (
6a) to rotating post (8a) or rotating boss 117B
) from the small cassette fi+ or large cassette fti+, tension post (tension post (2) only for recording/playback), rotating boss) 01, 1, tilted post 1, rotating post Iυ■, erase head 163
), limiter post 1, a rotary cylinder containing a rotating head (not shown), a limiter post, and an audio control head, which are driven by a capstan β barrel and a pinch roller β1. Furthermore, the magnetic tape C! υ returns to the inside of the small cassette i11 or the large cassette (5) and connects to the small reel (2b) or dog reel (6) via the rotating post (to) or rotating post (7b).
b) It is wound up 4. However, the pinching between the capstan and the pinch roller (8 scratches) is performed only during recording and playback.

The rotating boss) (591(itυ(64) and the inclined post 1 are operated by the rotating ring σQ to pull out the cicada tape from the small cassette [11 and the large cassette (5). The rotating ring 4 is connected to the substrate ( Guided by rollers (72a) (72b) (720) rotatably held by bottles (71aB71b) (710) installed in +9),
It is rotated by a loading motor (not shown). The capstan IS has a bearing f attached to the substrate (19).
It is rotatably held at f3. The capstan β
The barrel has a capstan pulley (741), and the gear stand 4 receives the driving force of the capstan pulley by the motor booby IJ ff[e via the bell 1-ffη, and is rotated clockwise.

In FIG. 8, the pinch roller is rotatably held by a pinch roller shaft 9) installed evenly around the pinch roller arm shaft, and the pinch roller arm decoy is based on the base ff1.
It is rotatable about the pinch roller arm shaft installed at (+9) as a fulcrum. The other end of the pinch roller arm decoy is rotatably connected to one end of the trouble lever -AωI) via a shaft 18''4, and the pinch roller arm decoy has the other end connected to one end of the trouble lever -AωI) so as to be rotatable by -C.
The other end is connected to one end of the trouble activation lever.
-B is rotatably connected to one end of the trouble lever via a pin (c), and the other end of the trouble lever ``H'' is rotatably connected to one end of the toggle lever -CH via a pin, and furthermore, the trouble lever 〇 flf9 is the shaft implanted on the substrate α9)
It is possible to rotate around the center. - is a pinch roller pressing spring, and one end of the pinch roller pressing spring is embedded in the base plate and is hooked to a bottle, and urges the trouble lever shown in Fig. C in a clockwise direction. +91) is a stopper that restricts the clockwise rotation of the trouble lever cH. 0 is a pinch roller return spring, and the pinch roller return spring is attached to a pin (93
1 and urges the bottle (8 [9) and the trouble activation lever (c) in the direction of arrow E. The trouble activation lever has the other end attached to one end of the pinch roller pressing lever. The pinch roller pressing lever is rotatable around the pin hole planted in the substrate. It is a roller pressing pin, and the rotating ring 4 is a rotating post 191131111'Zr and an inclined post β.
1 to a predetermined position (FIG. 1), the pinch roller suppression pin is moved clockwise by the stroke of the pinch roller suppression. The pinch roller suppressing pin operates the pinch roller suppressing lever by the clockwise rotation of the rotary ring 4, and further operates the pinch roller suppressing lever. C-, operate the pinch roller arm ffl. At this time, the pinch roller suppressing pin brings the pinch roller into contact with the capstan, and also leaves a gap (W) between the trouble lever CM and the stopper (91), and the pinch roller suppressing pin is pressed against the capstan. A pressing force is applied to the pinch roller (lil).The tension lever (l barrel) is operated at the same time as the pinch roller (@) is pressed against the capstan (not shown).
, the tension post (2) is brought into contact with the magnetic tape e211.

In FIG. 7, the small cassette fi+ is stored in the adder free barrel when stored in the cassette storage (not shown). Since this adapter barrel has a notch (98a), it is configured so that the cassette detection plate (Ha) (88b) does not operate. In this example, the adapter side is used to store small cassettes (11), but small cassettes (11) are stored.
) r (It is also possible to create a concave groove, protrude a convex part into the cassette storage, and use the convex part as a guide to store the cassette l).

Next, its operation will be explained. First, the operation of storing a cassette in the cassette storage (not shown) will be explained. Attach the small cassette ill to the adder free (c) and store it in the cassette storage. At this time, the cassette detection plate (Baa) (g
ab) does not operate, so the reel stands (9a) and (9b) are the same as when no cassette is stored, and the small cassette l-f
It stands by at a position (FIG. 1) where it can be locked with the small reels (2a) and (2b) of il. If it is a large cent (5), store it in the cassette storage. At this time, the cassette detection plate (88a) (gab) is moved in the directions of arrows F and G by the rear edge of the large cassette (5), and further the wire (8
1a) (81b) to move the reel table moving board (12a) (12
b) Rotate in the direction opposite to arrow C and arrow direction. The reel stands (9a) (9b) move to the positions shown in FIG. 2 and stand by at positions where they can be engaged with the dog reels (6a) (6b) of the large cassette (5). When storage in the cassette storage is completed, the cassette is attached to the main body of the apparatus. At this time, the reel stand (9
a) (9b) and reel (2a) (2b) or (6a)
(6b) is engaged.

Next, the tape loading operation will be explained.

When the cassette is attached to the main body, it is detected by a cassette detector (not shown), the motor shaft rotates, the brake release gear is rotated half a rotation by the worm gear, and the release roller is moved from the position on the worm gear wheel side as shown in Figure 3. 4, and is stopped by a brake release gear position detector (not shown). As the release roller moves, the brake release levers (8Ba) (asb) are operated, and the reel base (14a) (14b) of the brake levers (14a) (14b) is activated.
9a) (9b) The pressure contact force is released. Also, at this time, the reel drive idler (7) comes into contact with the motor pulley 07), but since the motor (c) does not rotate, the reel stand (9a)
(9b) is not driven. Next, the rotating ring σ1 rotates clockwise, and the magnetic tape is rotated by the rotating boss) t591
(The small cassette is pulled out from the large cassette [61 by 13'10 and the inclined boss, and the loading process is completed by forming a fixed root angle (Fig. 1 and (Fig. 2).However, at this time, the pinch roller press Li:bin is not operating the pinch roller suppression lever υ41.The tape loading is completed.
Then, the motor rotates, the brake release gear (rotation) rotates half a rotation, and the release roller tA moves from the position shown in Fig. 8.
Move to the worm gear side position and stop. At this time, the reel stand (9a) (9b) is the brake lever (14a)
(14b), and further the release roller t4 V
By rotating the idler operating lever @3 from C, the reel drive idler (A) is released from contact with the motor pulley (B). In this data loading state, tape fast forwarding, rewinding, and recording/playback are performed.

Next, the tape fast forwarding operation will be explained. When the mode selection switch (not shown) is set to tape fast forward mode (J''゛F゛F mode, the motor rotates, the brake release gear rotates half a turn, and the release roller moves) to the position shown in Figure 3. At this time, the brake levers (14B) (14b) on the IJ + reel stand (9a) (1) are released, the motor 0 frame further rotates clockwise, and the reel drive idler θ1 is connected to the motor pulley θ. The reel drive idler (to) is moved toward the take-up reel stand (g) by the rotational force of the motor (9), and the driving force of the motor (to) is combined with the automatic loading force of the reel drive idler (7). The magnetic tape is transmitted to the take-up reel stand by the push-up blade of the spring). At this time, the magnetic tape 0 is taken up by the small reel (2b) or the dog reel (6b) and fast-forwarded.Next. If you rub the mode selection switch to stop (STOP) mode V, the motor will start.
rotates, and the brake release gear (6'4 rotates half a turn and becomes the release roller) moves from the position shown in FIG. 3 to the worm gear haze side and stops. At this time, the reel stands (9a) (9b) are braked by the brake levers (X4a) (14b), and the motor pulley (b) of the reel driving idler 00 and the take-up reel stand (91) are released from contact. Tape fast forward operation stops.

Next, the Arp rewinding operation will be explained. When the mode selection switch (not shown) is set to tape rewind mode (kLEW mode), the motor rotates, one bottle rotates half a turn toward the brake release gear, and the release roller member moves to the position shown in Figure 8. and stop. At this time, the reel stand (91 (sb)) is released from the brake lever (14a) (t4b),
Further, the motor rotates counterclockwise, and the reel driving idler comes into contact with the motor pulley θη. The reel driving idler (to) is moved to the supply reel stand (9a) by the rotational force of the motor, and the driving force of the motor is applied to the reel driving idler). is transmitted to the supply reel stand (9a) by the pushing force of. At this time, the Denki Tezo C21+ is wound and rewound by the small reel (2a) or the thick reel (6a).

Next, when the mode selection switch is set to stop mode (S'l'OP mode), the motor rotates, the brake release gear rotates half a rotation, and the release roller moves from the upright position shown in Figure 8 to the worm gear side. Stop. At this time, the reel stands (9a) (9b) are connected to the brake levers (14a) (14
b), and furthermore, the contact between the motor pulley (b) of the reel drive idler (to) and the supply reel stand (9a) is released, and the tape winding (l@) return operation is stopped.

Next, the magnetic tape recording operation will be explained. When the mode selection switch (not shown) is set to recording or playback mode (RJ bow C, JJl, AY mode), rotating ring 4 rotates in the open direction, and the pinch roller is operated by the pinch roller suppression bin. The magnetic tape 211 is then pressed against the capstan branch, and the magnetic tape 211 is fed at a constant speed.At the same time, the tension post holder contacts the magnetic tape holder 1, giving constant back tension to the magnetic tape holder 1. At the same time, the take-up reel stand (9b) becomes the same as the tape fast-forwarding operation, and the magnetic tape (2υ is the take-up small reel (2b) or dog reel (2υ) is fed at a constant speed by the capstan IQ and the pinch roller.
6b) (Figs. 1 and 2). However, the driving voltage of the motor (g) is lower than that during the tape fast-forward operation, and the driving torque of the take-up reel stand (9b) is small, so that it does not affect the rotation of the capstan. Next, when the mode selection switch is set to the stop mode (5TOP mode), the drive of the take-up reel stand (9b) is stopped (e) in the same way as when tape fast forwarding is stopped, and the reel stands (9a) and (9b) are also braked. At the same time, the rotating ring 4 is rotated counterclockwise until the pressure contact between the capstan and the pinch roller is released and the state is the same as when tape loading is completed. Recording and playback of the magnetic tape e211 is stopped. At the same time tension boss) t22
is released from contact with the magnetic tape.

Next, the tape unloading operation will be explained. When the unloading switch (not shown) is operated, the motor rotates, the brake release gear I''IJ rotates half a rotation, and the release roller Z moves to the position shown in Figure 8 and stops.At this time, the reel stand ( 9a) (9b) is when the brake lever D4a) (14b) is released and the motor (
The reel drive idler (g) comes into contact with the motor pulley (b). The idler wheel for driving the reel is supplied by the rotational force of the motor and the reel stand (9a)
The driving force of the reel driving idler (to the motor) is transmitted to the supply reel (9a) by the automatic biting force of the reel driving idler (to) and the pressing force of the spring (to the spring). At the same time, the rotating ring 4 rotates counterclockwise, and the magnetic tape η forming the loop is wound onto the supply reel (9a). Furthermore, by rotating the rotating ring 40 times, the rotating boss) Mllll (i
121 and the inclined post return into the small cassette [11 or the large cassette (6), the rotation ring 4 stops,
At the same time, tape rewinding is stopped and the supply reel stand (9a)
The drive of the reel stand (9a) (sb) is stopped, and the reel stand (9a) (sb)
is braked by the brake levers (14a) and (14b), and tape unloading is completed.

As is clear from the above description, according to the present invention, it is possible to move the reel stand to a position corresponding to the reels of the large cassette and small cassette, so the pitch between the reels can be adjusted between the large cassette and the small cassette. Large cassettes and small cassettes can be easily used together even if they are different. Furthermore, the moving fulcrum of the reel stand, the fixed end of the tension band of the tape tension control means, and the brake lever point of the reel braking means are arranged so that they are in the same center, or almost in the same center, so that the reel stand cannot move. The relationship between tape tension control, reel braking, etc. will not change even if the tape tension is controlled.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the device according to the present invention when using a small cassette, FIG. 2 is a plan view of the device when using a large cassette according to the present invention, and FIG. 8 is a plan view showing the reel drive section of the present invention. 4
The figure is a plan view showing the relationship between the uninvented reel drive unit and the brake lever, FIG. 5 is a side view of FIGS. 1 and 2,
FIG. 6 is a side view of FIG. 4, FIG. 7 is a sketch showing the small cassette adapter, and FIG. 8 is a half-view showing the structure of the tension band. fll...Small cassette, (2a) (2b)...-Reel, (5)...Dog cassette, (6a) (6b)--Reel, (9a) (9b)...Reel stand, ( 12a)(
12b)... Reel stand moving board, (18B) (181
))... Reel M, (14a) (14b)... Brake lever, ■... Tension lever, r2υ...
Magnetic tape, (to)... - tension band, brown...
・Bin (fixed end), (28a) (28b)...Reel stand moving axis, (31a) (3tb)...-Twier-, (
88a) (88b) --- Cassette detection plate, (88a)
(88b)...Brake release lever, rA・-mo
Ta, #・We except o -ra, (51a) (51b)...
Power point bottle, (6-yen...motor, bell gong...capstan, (P4...pinch roller, 4...rotating ring,
0 barrels...Adapter agent Yoshihiro Morimoto

Claims (1)

[Scope of Claims] 1. A magnetic recording/reproducing device that uses both a long-time recording/playback cassette and a short-time recording/playback cassette with the same abrasive tape recording format, the cassette identifying the two-way set. After identifying the double-force set by the identification means, the reel stand, the tape tension control means, the reel stand braking means, and the cassette identification means, the reel can be engaged with the reel built in the double-force set. A first position where the center of the stand and the reel center of the long-time recording/playback cassette are coaxial, or a first position where the center of the reel stand and the reel center of the short-time recording/playback cassette are coaxial. a reel stand moving means for moving the reel stand to position No. 2; 2. At least the tape tension control means is configured so that it can be used in combination even when the reel stand is located at the first position or the second position [the magnetic field recited in claim 1] Recording and playback device. 8. Reel stand movement fulcrum and tape tension controller i
2. The magnetic recording and reproducing apparatus according to claim 1, wherein the fixed end of the tension band and the brake lever point of the reel stand braking means are arranged in the same center or in the same center. 4. The magnetic recording device according to claim 1, wherein the reel stand stands by at the second position and is moved to the first position by the reel stand moving means when the cassette for long-term recording and playback is used. playback device. 5. When the reel stand is in the first position or the second position, with respect to the bisecting line segment that bisects the angle formed by the tension band around the fixed end to the tape tension control means, 9. The magnetic recording and reproducing apparatus according to claim 8, wherein the fulcrum of the tension control means is provided on a perpendicular line segment orthogonal to each other at the fixed end.