JPS605455A - Magnetic video recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the load to a loading motor and to decrease the number of component parts by actuating both a pinch roller mechanism which drawn out a magnetic tape and a shift mechanism for guide post which performs a tape loading action with no shift of timing. CONSTITUTION:A loading motor 25 is rotated counterclockwise as a cassette is inserted, and a pulley 27 is rotated counterclockwise via belt 28. Therefore, a worm gear 29 unified with the pulley 27 is also rotated counterclockwise. A slide pin 71 presses a rotary link 72 as soon as a magnetic tape 67 is drawn out by a guide post 66 since a slide pin 71 is fitted with a play into a slit 73 of the link 72. Thus the link 72 is rotated clockwise. Then the side face of a gear slider 74 is pressed by the other end of the link 72, and the slider 74 is shifted left against the elastic power of a spring 110. A gear 79 interlocks an arm 78 via a coupling shaft 78a, and therefore the arm 78 is rotated counterclockwise to draw the tape 67 out of the cassette through the rear side of the tape 67 by means of a tape draw-out ball 7.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a mechanism for reliable tape loading of a magnetic recording/reproducing device.

(b) Prior Art FIG. 1 is a plan view of the main parts of a conventional magnetic recording and reproducing apparatus. The geared motor (1) meshes with the first gear (2),
At the same time, the first gear (2) is meshing with the second gear (3). A notched gear (4) provided coaxially with the second gear (3) meshes with a sector gear (5) K, and the other end of the sector gear (5) meshes with a gear (6). A sector gear (7) provided coaxially with the gear (6) is provided with a protrusion (8) and a two-stage gear part, one gear part being a gear 0D provided with a protrusion (101).
It meshes with the Further, on the same axis of the gears (9) and (11), links (12+(13)) each having a receiving part that engages with the projecting piece (81 (1 (1)) are provided, and link a2 is provided with link 04. Connect and attach the guide post (link α4) to the guide post (
1!19 is connected (16j is connected, link (131 is connected to link (lη), and the link (17
) to the guide boss) [191 is connected and provided, and the magnetic tape is moved along the guide groove (2(2υ) to the stopper CI!2tc7:1, and the magnetic tape is placed in the cylinder (2). Pull it out to the surroundings.

The operation during tape loading will be explained below.

First, as the cassette is inserted, the geared motor (1) is rotated clockwise to rotate the notched gear (4) clockwise via the first gear (2) and second gear (3). let Thereby, by rotating the sector gear (5) counterclockwise, the sector gear (7) meshed with the sector gear (5) is rotated clockwise.

Therefore, the force is transmitted through the sector gear (2) to the projection (8).
The link (10) is rotated counterclockwise by the suppression of
The guide post (151) is moved upward along the guide groove (at the same time, the gear (9) and the gear shaft υ are in mesh with each other, so when linking, it moves clockwise due to the suppression of the protrusion aω). Rotate and move the guide post (181 upward along the guide groove (2υ). Guide post (15) (+8
1 has finished moving on the guide grooves (20) (21), the bottle CI provided on the fan-shaped box car (5)! At ω, press the cam CI! provided on the sector gear (7) in the direction of the arrow, and after the loading operation is completed, the cam CI! of the sector gear (7) is pressed. 6) The pressure angle with the bottle (25) as seen from the bottle (25) is 90°.

Guide post (151 (181) to stopper (221 (2)
When moving the magnetic tape away from the cylinder (24) and storing it in a cassette (not shown), the guard motor (11) is rotated counterclockwise. 1 step of deceleration
Since it is a gear that can obtain a high reduction ratio of /200,
Via the first gear (2) and second gear (3), the pin (251) provided on the sector gear (5) presses the cam provided on the sector gear (5), and at the same time the sector gear (251) Gear (2) meshed with gear (2) and gear αυ meshed with gear (2) K were rotated, and the guide post a5118 placed on link UaU■
1 is moved downward along the guide groove CI'0) (2]), and the magnetic tape is stored in the cassette. At this time, the force applied to the geared motor (1) becomes extremely large.

Therefore, in the conventional example, the load applied to the loading motor to be driven is very large, and the current consumption is very large, so the motor is driven by a geared motor.

In addition, the number of parts that make up the mechanism is large and complex, making assembly extremely time-consuming.

(C) Object of the Invention The present invention utilizes a pinch roller mechanism for pulling out a magnetic tape of a magnetic recording/reproducing device and a moving mechanism for a guide post for tape loading. Pull out the magnetic tape inside,
A magnetic recording and reproducing device that winds the magnetic tape around the circumferential surface of a cylinder having a rotating magnetic head, which includes a chassis having a guide groove, a post mounting table having a loading post and a guide post, and a guide groove provided on the surface. comprising a driving means having a loading gear and moving the boss mounting table, and a holding means engaging with the guide groove, and stopping rotation of the loading gear when moving the boss mounting table to the loading position. The magnetic recording and reproducing apparatus is characterized in that the boss mounting table is held at a loading position at one end of the guide groove without being moved.

(e) Examples Examples of the present invention will be described below.

Fig. 2 is a side view of the main parts of the magnetic recording/reproducing device, Figs. 3 and 4 are explanatory plan views of the loading mechanism, Fig. 5 is a perspective view of the main parts of the configuration related to loading, and Fig. 6 ~Figure 9 is an explanatory plan view of the loading mechanism, Figure 10 is a perspective view of the vicinity of the lock gear, Figures 11 and 12 are explanatory plane views of the lock mechanism, and Figure 13 is the configuration of the pinch roller crimping area. The perspective view, FIGS. 14 and 15 are explanatory plan views of the pinch roller pressure bonding mechanism.

First, in FIG. 2, a bell [8] is hung between the loading motor 12:il and the boot IJ-(27) provided under the chassis (G). The worm gear (c) provided integrally with the pulley (27) meshes with the lower gear Oυ of the two-stage wheel gear mechanism as shown in FIG. The upper gear CL of the wheel gear (■) meshes with a loading gear which is a two-stage gear part with a sliding part on one side, and then a coaxial gear as shown in Fig. 5 is connected to this loading gear. It meshes with one of the first gears, which have a structure in which the upper and lower parts are separated, and the reverse gear (three gears mesh with the other of the first gears).

The reversing gear 05) meshes with the other of the first gear (b), and is also rotatable with the loading ring restricted from meshing. A spring mounting pin is provided on the surface of the loading ring, and
Provide an arm mounting hole. One end of the first arm (a) is pivotally supported in the arm mounting hole 0cl), and the spring mounting pin G~
A spring (4I) is inserted between the tip of the first arm (4(j)
Attach the first arm (4υ) and always bias the spring-mounted pin in one direction.

The other end of the first arm (9) is coaxially connected to the second arm (one of its members), and the first spring engaging piece (421) of the first arm (9) is connected to the other end of the first arm (9). The second spring engaging piece (431) of the second arm (B) has a coil spring (4
41, and the coil spring (441) is biased outwardly by the first arm (9) and the arm (in between) of #J2.The other end of the second arm (41) is (Guide groove provided in 2Q (Loading post, which is the axis of the tape pull-out part that moves on 4 points) (461 is planted, and the first link ( 47) is pivotally supported.The above constitutes a driving means.A guide post is installed at the other end of the first link (4η), and a guide groove (451 is traced). go.

Also, the guide post (4→) and the chassis (26
), install a spring 60 between the post mounting base (!53) and the tension pin guide piece (491), and attach the post mounting base (to) to the guide post) (attached in the 4a1 direction). It is strong.

The configuration of the tape drawer is that the chassis (26) is placed on the chassis (26) and coaxially with the loading post (4 seconds).
Place the first link (47) and the tilted pole 51) attached so as to sandwich the
2 is provided, and a boss mounting table t53I is provided on the first link (47).

Next, guide pin I on the second link (b) attached to the back of chassis 4! 59 is loading gear (2)
Trace the guide groove (45) on the back side and attach the second link (
The receiving piece t5Q of (b) presses the suppression pin 6 frame provided at one end of the slider (and a rack 69 is integrally provided at the other end of the slider (b), and this rack (59)
The pinion +60) meshes with the shaft, converting linear motion into curved motion.

A guide hole (6υ) is provided in the pinion (60), and a guide hole (6υ) is provided on the third arm (6th floor).
A biasing spring (64) is provided coaxially with the pinion haze so as to loosely fit into the pinion pin (6I) and bias the first pin G, b39 to one end of the guide hole (61).

The third arm (621 has a pinch roller mounting piece (65)
) are coaxially connected at the other end, and this pivot joint is used as a second guide post (66) to pull out the magnetic tape.

The pinch roller mounting piece is U-shaped, and the pinch roller mounting shaft (68) is used to pivot the pinch roller mounting piece (68), and the pinch roller mounting shaft (68) is connected to the chassis (2).
6) Trace on the guide cam (17o) provided above. In addition, the sliding pin Qυ provided at one end of the slider ■ is loosely fitted into the first long σ rise of the rotating link ■, and the sliding pin Qυ provided at one end of the slider
A can obtain rotational force and slide the gear slider.

The gear portion 65) on the gear slider (74) is connected to the second gear (
The third gear (79) is coaxial with the fourth arm (781) and has a tape pull-out pole ση located on the chassis (26) at one end. (76) engages, and the fourth arm σen and the third
The gear (79) is partially connected, and the magnetic tape is pulled out by the tape pull-out ball ση.

Next, the configuration of the tape tension mechanism after tape loading is shown below.

A suppression pin (80) is installed on the back side of the loading ring □□□, and a pivot pin (26) is installed on the chassis (26).
26) A fifth arm υ that engages with the suppression bin f80) is provided on the lower surface, and a fourth gear @]) is provided coaxially with this pivot.

Rotating gear g32 meshing with the fourth gear (111);
Chassis c! Q has a second inclined pole @4) on the top surface,
A lint is installed on the rope puller that moves near the cylinder. In addition, one end of the third link thin is joined to the fifth arm @0, an arm locking pin (c) is planted, and a third link is attached to the arm locking link shaft provided coaxially with the fourth arm decoy.
Join the other end of the link. A tension pin (
90) is always biased in the counterclockwise direction, and as the tension arm (91) provided on the chassis (26) rotates, it is restricted by the arm locking pin P and the tension arm (91) is suspended. perform a movement.

Next, impedance roller (921), erase head (921)
3) The configuration of the mounting arm (g) and the moving mechanism made of the pinch roller crimping piece is as follows. A fourth link pin having the shape shown in FIG. 13 is planted with a second trace pin (T) that traces the guide groove (451) provided on the back side of the loading gear acid, and is designed to sandwich the loading gear acid. , attach the second pin (9→) planted on the fourth link (971) to one end of the mounting piece engagement arm (T),
At one end there is an impedance roller (an impedance roller and an erasing head (93
) The other end of the mounting piece engaging arm (Z) presses the other end of the mounting arm (G). In addition, a pinch roller crimping bar is provided on the chassis (26) coaxially with the fourth link (B) and via the second pin (blanking, fixing piece 0) and coil spring (101).Pinch roller crimping piece ( A pinch roller suppressing portion (+00ζ 0 →) is provided on the upper and lower surfaces of one end of the case.

The locking mechanism of the post mounting table 63) has the following configuration.

A second guide groove (103
) is provided to guide the second guide groove (103) to the first trace pin (105) planted on the back surface of the trace arm (104). Trace arm (10
4) The second trace pin (106) planted above traces the third guide groove (108) on the back surface of the lock gear Qo7). At this time, the lock gear (10'7) is coaxial with the loading gear, and the lock gear (10'7) is coaxial with the loading gear.
) and the trace arm (104) with the spring (109)
is attached. In addition, the lock gear (107) is
It meshes with one of the first gear centers.

This completes the explanation of the configuration of the mechanism for loading the magnetic recording/playback device.

Next, the loading operation of the magnetic recording/playback device will be explained.

First, the half loading mechanism will be explained.

As the cassette is inserted, the loading motor (c) is rotated counterclockwise in FIG. As a result, the pulley (C) is rotated counterclockwise via the bell Hal, and the sickle of the worm gear C2, which is provided as one body, is also rotated in the direction of 1□. As shown in FIG. 5, the lower gear 0υ of the wheel gear palm meshed with the worm gear C29) rotates clockwise, so the upper gear 02 of the wheel gear (3) transmits rotational force to the loading gear acid.

Loading gear acid rotates counterclockwise. And the guide groove (45) provided on the back side of the loading gear (G)
is traced by the guide pin 6 placed on the second link ■. At this time, the guide pin (55) is traced by the guide groove (4) in the counterclockwise direction of the loading motor (c). As the loading gear rotates, the distance from the axis of the loading gear gradually increases, so the second link (
b) rotates clockwise around a pivot pivoted on the lower surface of the chassis (26). Therefore, the receiving piece (5Bl presses the pressing pin (58) installed on the slider @ downward, and the rack 69 integrally molded on the slider (B)) and the sliding pin (7υ move downward. I will do it.

In order to rotate the pinion meshed with the rack (5) clockwise, the first pin (63) set on the third arm (6) is pressed through the biasing spring (641). , 3rd
Rotate the arms clockwise. Therefore, the pinch roller mounting piece (5) coaxially connected to the other end of the third arm 1121 is pulled up, but the pinch roller mounting shaft provided for pivotally supporting the pinch roller on the pinch roller mounting piece (651) (l is engaged with the guide cam (70) on the chassis (26), so while it is defined by the pinch roller mounting piece (61 is the guide cam σ0), the back side of the magnetic tape (6η) is ) The pinch roller mounting piece (second guide boss on θω) (66) has moved outward (.

magnetic tape (67) by magnetic tape (2nd guide boss) (66)
) At the same time as pulling out the sliding pin (71), since it is loosely fitted into the first long part (73) of the rotating link, the sliding pin (7υ presses the rotating link ■, and the clock This rotation causes the other end of the rotation link (72) to press the side surface of the gear slider (A), causing the gear slider (
74) moves to the left against the elasticity of the spring (110). The second gear (76) meshes with the gear part (75).
) will now rotate clockwise, and will further rotate the third gear (79) counterclockwise. Third gear (
7 (g) and the fourth arm (7al) are the engagement shaft (78a
), the fourth arm (l) rotates counterclockwise, and the tape drawer ball (7η) rotates counterclockwise.
Pull out the magnetic tape (6η) outward from the cassette (not shown) from the back side of the magnetic tape (671).

FIG. 4 shows the state when half loading is completed. When half-loading was completed, the boss mounting table and tension arm (9υ) were not moving at all.

After half loading is completed, the loading motor (
25) rotates counterclockwise, thus causing the loading gear □□□ to rotate counterclockwise. The upper gear (34a) of the first gear (b) that meshes with the loading gear acid has been rotating since half loading, but when half loading is completed, the first protrusion (34b) of the upper gear (34a) However, the first gear 〇 lower gear (34c)
engages with the second protrusion (34d) and begins to transmit rotational force. Then, after rotating the first gear in the clockwise direction, the loading ring [with] is rotated in the clockwise direction via the reversing gear.

At this time, the loading ring ■ is connected to the guide roller (37a
) (37b) (37c), it rotates parallel to the chassis (c). The spring is attached to the first arm with the screw (+1a) attached to the pin (μs), and the spring is attached to the pin (7).
) direction, and the first arm (2) is pivotally supported at one end of the arm attachment hole (4). By rotating the loading ring in the clockwise direction, the first arm (W) and the second arm (B)
, the first link αη are connected, so the loading post provided at the other end of the second arm (b)
(46) and the guide groove engaging portion at one end of the first link (47) trace the guide groove (45) provided in the chassis (26) and wind around the cylinder @5). .

The post mounting table (to) is provided coaxially with the loading post (46) at the other end of the second arm (41), so it moves as the loading ring □□□ rotates. (531 and guide post) (A spring (50) is installed between the tension bin guide piece (49) provided coaxially with 451, and the posture of the boss mounting table (toward) is adjusted as shown in Figures 6 to 9. From this, the boss mounting table 53) and the inclined ball (5υ) are the cylinder (c).
The magnetic tape (6'D) is reliably pulled out without coming into contact with the magnetic tape (6'D).

The tension arm (91) also has a spring (111).
Therefore, by pulling out the tension pin guide piece (49) along the guide groove (45), the restriction of the tension arm (9υ) is gradually released, so that the tension Pin guide piece (
49) The tension pin (90) is guided along K and rotates counterclockwise. Tension arm +9
As 1) rotates, the tension pin (90)
is from the tension bin guide piece (49) to the guide post) 4
The engagement position changes to 81, and the tension arm (9
When υ no longer engages with the guide post (arm locking link 9), the tension arm (91) engages with the arm locking pin (c) installed in the arm locking link 9), and the loading The tension arm (9) remains in the position shown in Figure 8 until the post (46) has moved near one end of the guide groove (49).

The posture of the post mounting base 63) is determined by the guide piece (112) provided on the position regulating unit 6 (bottom chassis bottom) provided on the back side of the post mounting base 63), and the post mounting base 63) is moved on the guide groove. To go.

The loading ring (361) rotates further clockwise until the stain 77'.

As we go, it's winter! The pressing pin ■ provided on the back side of the fifth arm [F] resists the elasticity of the spring (, 113).
Rotate υ counterclockwise. One end of the third link stem is joined to the fifth arm [F]υ, and the third link Q
37) Since the other end is connected to the arm locking link frame, the counterclockwise rotational force of the fifth arm member υ is applied to the arm locking link @9) via the third link c. clockwise, and tighten the arm locking pin (c) with the tension pin (
90) to release the lock.

As the fifth arm [F]D rotates counterclockwise,
The fourth gear (82) provided coaxially with the fifth arm υ also rotates counterclockwise. From this, the rotating gear (c) that meshes with the fourth gear (b) rotates clockwise. Then, the loading arm provided coaxially with the rotating gear (c) is interlocked with the fourth gear (8'2J) and rotated counterclockwise.
Bring the second inclined ball close to the cylinder (8!51) and wrap the magnetic tape around the cylinder.

FIG. 9 shows a state in which tape loading and tape tensioning have been completed.

Further, since the loading motor (25) continues to rotate counterclockwise, the loading gear (c) continues to rotate counterclockwise, but the loading gear Sogami is configured as shown in Figure 10. There is.

The structure of the holding means is as follows. The second guide groove (103) provided on the surface of the loading gear acid is connected to the first trace pin (103) provided on the back surface of the trace arm (1 barrier).
05) traces, the tracing arm (1st position) rotates counterclockwise. Trace arm (10
Since a spring (109) is provided between the lock gear (107) and the lock gear (107), the lock gear (107) meshes with the first gear (b) and rotates counterclockwise as the loading gear rotates. Perform rotation. First trace pin (105)
traces the second guide groove (103), but the second trace pin (106) comes into contact with the third guide groove (ios) provided on the back surface of the lock gear (107), and the lock gear ( 107) from rotating in the counterclockwise direction. At this time, the sliding part of the loading gear θ comes into contact with the first gear, so the loading gear is rotating.
The locking operation of the post mounting table is performed without transmitting rotational force to the first gear □□□. Fig. 12 shows a state in which the locking operation of the loading ring □□□ has been completed.

This locking operation is completed at the same time as tape loading is completed.

After the tape loading operation is completed, the second trace pin (Al:+;) set on the fourth link traces the first guide groove (45) provided on the back side of the loading gear acid. Rotate link 4 (b) counterclockwise. From this, rotate the pinch roller crimping piece (G) clockwise via the fixed piece and the coil spring (101),
The pinch roller suppressing portions (102) provided on the upper and lower surfaces of the pinch roller crimping piece press the upper and lower surfaces of the pinch roller attachment piece t651, thereby crimping the pinch roller (6g) onto the capstan (114).

Also, as the fourth linkage rotates clockwise, the mounting piece engaging arm holder moves to the right, and the mounting arm (to) where one end of the mounting piece engaging arm is locked is moved. The movement of the cape is released, and due to the tension of the spring (116) provided between the arm stage (115) and the mounting arm (eel), the mounting arm cape is centered around the axis set on the chassis (E). The magnetic tape (67) is rotated counterclockwise to press the impedance roller (9) and the erase head (9) against the pulled-out magnetic tape (67).

Figure 14 shows the state before pinch low shear crimping;
The figure shows the state after pinch roller pressure bonding.

With the above steps, the operations from half loading to pinch roller pressure bonding in the magnetic recording/reproducing apparatus are completed.

Next, the magnetic tape unloading mechanism will be explained.

The mechanism that presses the pinch roller (69) against the capstan (114) is released. Figure 14 shows a state in which the pinch roller (6gl) is in pressure contact with the capstan (114).The loading motor (two) rotates clockwise in Figure 2.From this, the belt (two barrels)
Through this, the pulley (27) and the worm gear blade are rotated clockwise, and the lower gear (31) of the wheel gear that meshes with the worm gear (c) is rotated counterclockwise.

The upper gear rotates in the same direction as the lower gear θD, and the loading gear (G) meshes with the center of the first gear.
rotates clockwise. The second trace pin (106) planted in the fourth link traces the first guide groove (45) provided on the back side of the loading gear acid.
The fourth link (B) rotates counterclockwise, and presses the pinch roller crimping piece counterclockwise via the fixed piece 0 (G). From this, the pinch roller suppressing parts (102) provided on the upper and lower surfaces of the pinch roller crimping pieces are disengaged from the pinch roller mounting piece (f351), and the plate spring (116) attached to the guide cam Cl0 is released. The elasticity releases the pinch roller from the capstan (114).

Simultaneously with this operation, the counterclockwise rotation of the fourth link moves the mounting piece engaging arm holder to the left, and the mounting piece engaging arm holder is installed between the arm stage (115) and the mounting arm (goods). The loading arm (941) resists the elasticity of the spring (116).
rotates clockwise. Therefore, the impedance roller (931) and the erase head (931) are separated from the magnetic tape FI7. FIG. 14 shows this state. The capstan (114) of the pinch roller (69)
The impedance roller (921) releases the erase head (9'5) from contact with the magnetic tape (671).

Further, as the loading gear tune rotates clockwise, the second guide groove (1) on the surface of the loading gear
03) is traced by the second trace pin (106),
The trace arm (104) rotates clockwise to release the lock gear (107) from the second trace pin (106), and the lock gear (107) and loading gear rotate clockwise in conjunction with each other. The upper gear (34a) and lower gear (34c) of the first gear (b) rotate.
) rotates counterclockwise, and rotates the loading ring (2) counterclockwise via the reversing gear 05).

FIG. 12 shows the state of the loading ring when locked, and FIG. 11 shows the state of the loading ring when released.

Further, as the lock release operation is performed, the suppression bin g3 provided on the back side of the loading ring holder rotates counterclockwise, thereby releasing the suppression of the fifth arm. The fifth arm is rotated clockwise by the biasing force of the spring, and the arm locking link (901) is rotated counterclockwise via the third link f871. The tension arm Oυ is rotated clockwise against the tension of the spring (111) by the arm locking pin g3η installed on the link.

As a result, the tension force applied to the magnetic tape (67) is weakened.

At the same time, the fourth gear (c) provided coaxially with the fifth arm (9) also rotates clockwise, and the rotating gear meshed with the fourth gear (821) rotates counterclockwise. The loading arm ■, which is equipped with a second tilted pole at one end, also rotates in the same direction as the rotating gear @3), separating the second tilted pole @shun from the cylinder, and placing the magnetic tape on the frame. Cylinder Q
Release the wrapping around 351.

FIG. 9 shows the state when loading is completed, and FIG. 8 shows the state when tension is released.

Since the loading gear rotates further clockwise, the first arm (6) and second arm (b) attached to the loading ring □□□ are connected via the first gear east and the reversing gear O. is rotated counterclockwise around cylinder @9. From this, the loading post (4G) and guide post decoy move along the guide groove (451. Figure 8 shows the loading post). The figure shows the process of returning to the position.At this time, a spring 150) is provided between the tension pin guide piece (4!ft) and the post mounting base 53, and the post mounting base (53) is always connected to the guide post. ) (48) Since the biasing force is applied in the direction,
The post mounting table 63) moves without coming into contact with the cylinder. When the post mounting table 5J moves along the guide grooves (4), the guide posts (4) are blocked and the springs (
The tip of the tension arm (9υ) is pressed against the tension of the tension pin (9υ), and then the tension pin holder is pressed by the tension pin guide piece and is housed in a cassette (not shown).

The first arm light and the second arm (naka) are in the state shown in Fig. 6 and then in the state shown in Fig. 7, and are on standby.
state.

When performing an eject operation, the 10th arm (and the 2nd arm (6) is aligned with the guide groove (a) by rotating the loading gear clockwise and the loading ring) counterclockwise. and move it downward, resulting in the state shown in FIG.

With the above steps, the unloading operation of the magnetic tape (67) is completed.

(f) Effects of the Invention Since the gears constituting the mode switch mesh with the loading gear, by carrying out the present invention, when performing operations corresponding to each mode of the magnetic recording/playback device, the loading gear This load can be made very small.

For example, when performing no-loading on an 8mm 5fl recording/playback device, the pinch roller must be moved toward the capstan without moving the loading post, and the magnetic tape must be pulled out without touching the cassette. By implementing the present invention, the load on the loading gear is reduced to only the link that slides the slider, and the rotational force is not transmitted from the loading gear to the first gear due to the sliding portion provided in a part of the loading gear. Don't move the post at all (
, half loading can be performed.

When tape loading is performed, the load on the loading gear is transferred to the first gear and the first and second trace pins that trace the first and second guide grooves provided on the front and back of the loading gear. It takes. Therefore, the load applied to the loading gear changes depending on each mode, that is, the load applied to the loading motor becomes smaller, and the current consumption can be reduced.

Further, in carrying out the present invention, since the loading device using the loading ring, sector gear, etc. is combined, it is very simple, and the loading post and the guide post can be moved without requiring much space. Even in the assembly process, work efficiency can be improved by simply aligning each part in turn on the same axis.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main parts of a conventional magnetic recording/playback device, FIGS. 2 to 15 show the same device of the present invention, FIG. 2 is a side view of the main parts of the magnetic recording/playback device, and FIG. , Fig. 4 is a plan view of the loading mechanism, Fig. 5 is a perspective view of the configuration related to loading, Figs. 6 to 9 are explanatory plan views of the loading mechanism, and Fig. 10 is the vicinity of the lock gear. A perspective view of
Figures 11 and 12 are explanatory plan views of the locking mechanism;
The figure is a perspective view showing the configuration near the pinch roller crimping, No. 14.
15 are explanatory plan views of the pinch roller pressure bonding mechanism. Explanation of main drawing numbers: Loading motor, (261...Chassis, ■...Loading gear, 轡...Loading ring, (6)...First arm, (S...・Second arm, (45)...Guide groove, Loading post, (4B)...Guide post, 61
)...A diagonal pole, 63)...Post mounting stand,
671...Slider, (5 Camphor...Press bottle, ω・
...Rack, (607...Binion, (6)...Pinch roller mounting piece, 6Q...Second guide post,
(67)...magnetic tape, connection...pinch roller mounting shaft, tli...pinch roller, (70)...
・Guide cam, ■...Rotating link, (to)...
Gear slider, τ(1η...tape pull-out ball,
(F)...Rotating gear, (F)...Second inclined ball, (C)...Cylinder, (C)...Arm locking pin, (9υ...Tension arm, ( 93...
・Impedance roller, (9 turbidity... erasing head,
(Incorporated Foundation)...Placement arm, Ser...Pinch roller crimping piece, 轡...Placement piece engagement arm, (102)...Pinch roller pressing part, (107)...Lock gear, (
114)...capstan. Figure 1 Figure 15 Broom f4

Claims (1)

[Claims] (11) In a magnetic recording/reproducing device that pulls out a magnetic tape from a cassette and winds the magnetic tape around the circumferential surface of a cylinder having a rotating magnetic head, the chassis has a guide groove and a post mount having a loading post and a guide post. The post mounting table has a loading gear provided with a guide groove on its surface, and includes a driving means for moving the post mounting table, and a holding means that engages with the guide groove, and moves the post mounting table to a loading position. The magnetic recording and reproducing apparatus is characterized in that when the loading gear is loaded, the boss mounting table is held at a loading position at one end of the guide groove without stopping the rotation of the loading gear.