JP2591655B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rotating head type magnetic recording / reproducing apparatus
VTR).

[Prior art] Conventionally, as a tape loading mechanism of a VTR, a third
As shown in the figure, there were an arm lever 25 and a sliding guide hole 24 provided in a chassis, and as shown in FIG. 4, a sliding guide hole 24 and a loading ring 21 were used.

[Problem to be Solved by the Invention] In the conventional VTR as described above, as shown in FIG. 4, when the loading ring 21 is used, the loading ring 21 is arranged in the space at the rear (rear) of the rotating drum 1. As a result, the space factor is bad and it is disadvantageous to downsize the device. Also, as shown in FIG.
When using the arm lever during unloading
When the 25 is folded and stored, the arm lever 25 enters into the position of the reel drive system, and the arrangement of the reel drive system is restricted. Further, according to the conventional example, regardless of the method using the arm lever 25 or the method using the loading ring 21, the loading post units 2, 3 are pressed against the catchers 19, 20 at the end of tape loading to position the tape. Post unit 2,
3 had to be structured to be urged by a spring or the like. In addition, in each of the conventional examples, a sliding guide hole 24 must be provided in a chassis or the like, and there is a disadvantage that the strength of the chassis is reduced.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a magnetic recording / reproducing apparatus having a loading mechanism having a simple configuration without reducing the strength of a chassis.

[Means for Solving the Problems] According to the present invention, in a helical scan type magnetic recording / reproducing apparatus which draws out a tape from a cassette and winds the tape around a rotary drum at a predetermined angle to perform recording / reproduction, loading for winding the tape around the rotary drum A post unit, and a feed screw disposed on the chassis and meshing with the loading post unit, wherein a protruding guide portion is provided on the chassis below the feed screw, The unit is formed with a concave portion that engages with the guide portion, and the loading post unit is configured to be moved to a loading or unloading position by rotation of the feed screw.

[Example] In FIGS. 1 and 2, 1 is a rotating drum, 2 is a loading post unit on the drum entrance side, 3 is a loading post unit on the drum exit side, 4 is an inclined post on the drum exit side, and 5 is a rotation on the drum exit side. A post, 6 is a drum entrance side inclined post, 7 is a drum entrance side rotation post, 8 is a rotation roller, 9 is a capstan for feeding tape, 10 is a pinch roller, 11 is a tension post for keeping the tension of the tape constant, 12 is Idler directly connected to the feed screw rods 16 and 17; 13 is a relay andra; 14 is a drive idler directly connected to the motor 15; 16 is a feed screw rod for feeding the loading post unit 2 on the drum entrance side; 17 is the drum exit side Feed screw rod for feeding the loading post unit 3, 18 is a cassette, 19 is a catcher on the drum inlet side, 20 is a drum outlet A side catcher 26 is a chassis, and 27 is a guide projection on the chassis 26 for guiding the movement of the loading post units 2 and 3.

In the above configuration, the idler 12 is rotated by the motor 15 via the drive idler 14, and the feed screw rod
17 rotates. Accordingly, as shown by (b) in FIG. 2A, the drum outlet side loading post unit 3 moves to the loading position. At this time, the drum exit side loading post unit 3 is attached to the drum exit side catcher 20.
Are abutted and caught, and the tape is pulled out of the cassette 18 to form a loaded tape path. Also, the loading post unit 2 on the drum entrance side
Similarly, the feed screw rod is driven by the idler 12 through the motor 15, the drive idler 14, and the relay idler 13.
As the drum 16 rotates, the drum entrance side loading post unit 2 is caught by the drum entrance side catcher 19. On the other hand, at the time of unloading, the reverse operation is performed, and the tape is stored in the cassette 18. At this time, the feed screw rods 16 and 17 are rotated in the direction opposite to the direction at the time of loading.

The completion of loading and the completion of unloading are performed, for example, by controlling the motor 15 by a signal from a counter built in the relay idler 13.

FIG. 2B shows a second embodiment. In this case, the operation of each part is the same as that in FIGS. 1 and 2A, but the loading post unit 2,
By forming the guide convex portion 27 for guiding the feed post rods 2, 3, the reaction force received by the feed screw rods 16, 17 when the loading post units 2, 3 are moved is reduced, and the chassis 26
The strength of itself can be increased.

[Effects of the Invention] As described above, according to the present invention, by using the screw feed mechanism for moving the loading post unit, the space factor at the rear (rear) of the rotating drum is improved as compared with a conventional apparatus using a loading ring. Can be reduced in size. Further, a space around the reel drive system can be more than the conventional one using the arm lever, which is advantageous in design. Furthermore, with the screw feed mechanism, it is not necessary to make holes in the chassis, so the strength of the chassis can be increased. In addition, there is no need for a catching spring as in the conventional example, so the number of parts can be reduced and the structure is simple. Has the effect of becoming

Furthermore, the gap between the feed screw and the chassis required for rotating the feed screw is effectively used, and the device can be made thinner.

[Brief description of the drawings]

FIG. 1 is a plan view of a tape loading mechanism showing an embodiment of the present invention, and FIG. 2A is a first view showing a relationship between a drum outlet side loading post unit and a screw feed mechanism of FIG.
(A) is a front view thereof, (b) is a side view thereof, (c) is a plan view thereof, and FIG. 2B shows a second embodiment of the present invention. FIG. 3B is a front view, FIG. 3B is a side view, and FIGS. 3 and 4 are plan views of a conventional tape loading mechanism. In the figure. 1: Rotary drum 2: Drum inlet side loading post unit 3: Drum outlet side loading post unit 4: Drum outlet side tilt post 5: Drum outlet side rotary post 6: Drum inlet side tilt post 7: Drum inlet side rotary post 8: Rotating roller, 9: capstan 10: pinch roller, 11: tension post 12: idler, 13: relay idler 14: drive idler, 15: motor 16, 17: feed screw rod 18: cassette 19: drum inlet side catcher 20: drum Exit side catcher 21: Loading ring 24: Sliding guide hole, 25: Arm lever 26: Chassis, 27: Guide projection

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Sato 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Shoji Kikuchi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Co., Ltd. (56) References JP-A-57-143758 (JP, A) JP-A-60-183946 (JP, U)

Claims (1)

(57) [Claims] 1. A helical scan type magnetic recording / reproducing apparatus which draws out a tape from a cassette and winds the tape around a rotary drum at a predetermined angle for recording / reproducing, wherein: a loading post unit for winding the tape around the rotary drum; And a feed screw engaged with the loading post unit, a protruding guide portion is provided on the chassis below the feed screw, and the loading post unit is engaged with the guide portion. A magnetic recording / reproducing apparatus, wherein a concave portion is formed, and the loading post unit is moved to a loading or unloading position by rotation of the feed screw.