JPS6238553A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To prevent the damage of a tape by providing a moving tape control means which is interlocked with a loading means to stop contacting between the tape and a drum till the end of loading, and releases the stop in the loading end state. CONSTITUTION:Since the front end of a cam 21 is abutted on a roll 18 to pus a contact avoiding post 12b down against the tension of a torsion spring 20 according as an internal loading rig 13 is turned to advance in the direction of an arrow B, a tape 2 is not only stretched by guide posts 4b and 4a but also brought into contact with a drum 3 and is hooked around a guide roll 5b and is wound around the drum 3. In case of fast forwarding and rewinding, the internal loading ring 13 is turned in the direction opposite to the direction of the arrow B to drop the roll 18 to the bottom of the cam 21, and the contact avoiding post 12b is raised by the restoring force of the torsion spring 20 and cooperates with a contact avoiding post 12a to separate the tape 2 from the drum 3. Thus, the tape is fast forwarded and rewound quickly without damaging the tape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording or reproducing apparatus, and particularly to a tape running system effective for fast forwarding and rewinding a magnetic tape.

[Conventional technology]

Conventionally, magnetic tape (hereinafter referred to as "tape") is used in tape running systems for recording or reproducing, in which a magnetic tape is pulled out from a tape cassette and wound around a drum having a rotating magnetic head in a spiral manner at a required angle. ), there were two types of fast-forwarding and rewinding: one was to do it as is, that is, while the tape was loaded, and the other was to do it with the tape unloaded and stored in a cassette.

[Problem that the invention seeks to solve]

In this case, in the former type, the fast forwarding and rewinding of the tape is performed while the tape is wound around the drum, so when tape 2 is wound around drum 3 as shown in Fig. 8 (&), the angle becomes large. In the case where a small-diameter drum is used, the tape 2 is twisted considerably and wound around the drum 3, which puts strain on the tape 2.

On the other hand, in the latter case, the tape 2 is unloaded from the drum 3 and fast-forwarded and rewound while stored in the cassette as shown in FIG. 8(b).
Guide boss 1a*1 in 1 (hereinafter referred to as "cassette")
It is necessary to take measures such as using a guide roller or the like for b' to prevent damage to the tape. However, according to this method, the cassette itself becomes expensive and tends to be large.

[Means for solving problems]

In view of the above-mentioned circumstances, the present invention includes a tape loading means for pulling out a tape from a cassette and winding it around a drum having a rotating magnetic head at a required angle, and a tape loading means that operates in conjunction with the loading means until the loading is completed. The above-mentioned problem is solved by providing a movable tape regulating means that completely prevents the tape from coming into contact with the drum and releases the stop when loading is completed.

[For production]

Therefore, during recording and reproduction, the movable regulating member releases the blocking of the tape in accordance with the loading operation of the loading means, and during fast forwarding and rewinding, the movable regulating member moves the loading means between the unwarding state and the loading state. Each time the tape is stopped at the position, the tape is separated from the drum, so the tape is fast-forwarded or rewound independently of the drum.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 3.

First, I will explain the configuration.

FIG. 1 is an overall plan view showing the tape loading state during fast forwarding and rewinding.

1 is a cassette; 2 is a tape that enters and exits from the cassette 1; 3 is a drum around which the tape 2 is wound; 4a and 4b are guide posts that pull out the tape 2 from the cassette 1 and spread it out; 5a and 5b are the tapes that pass the tape 2 onto the drum 3 A guide roller for winding, 6 an inclined post, 7 an external loading ring on which the guide roller 5a and an inclined mestro are mounted, 8 a guide post, 9 a fixed inclined post, 1
0 is a guide roller with a fixed shaft, 11 is a capstan, 1
2a and 12b are contact avoidance posts that isolate the tape 2 from the drum 3 during fast forwarding and rewinding, and 13 is an internal loading ring on which the guide roller 5b and the guide post 8 are mounted.

And the contact avoidance boss) 12a, 12b raising and lowering machine W
t14a and 14b have symmetrical and almost similar configurations,
Referring to FIG. 3, the raising device 11114b will be described. A dogleg-shaped arm member 17b, whose base end is rotatably attached to a base 16b erected in the case 15 of the magnetic recording/reproducing device, has the above-mentioned tip end. A contact avoidance boss 12b is provided protrudingly, and a triangular piece 19t having a 7-ra 18 at the apex is attached. The triangular piece 19 is urged by a torsion spring 20 attached between the base 16b and the base 16b so that the triangular piece 19 is brought into close contact with the side surface of the base 16b and the contact avoidance boss h11b is always in an upright position. Furthermore, internal loading ring 1
The roller 18 comes into contact with a cam 21 provided on the lower surface of the roller 3.

Note that the base 16b is connected to the internal loading ring 13.
and the drum 3.

It goes without saying that the issuing mechanism 148 (not shown) is provided at a position symmetrical to the raising device 14b so as to be interlocked with the external loading ring 7.

Next, the effect will be described.

FIG. 1 shows the tape loading state during fast forwarding and rewinding.
Guide bosses) 4a, 4b that reciprocate while being guided by t)
The tape 2 pulled out and stretched is pushed toward the cassette 2 by the rising contact avoidance bosses N2a and 12b and is separated from the drum 3, and fast-forwarding and rewinding are performed in this state.

Then, in order to reproduce the magnetic recording, tape 2 is transferred to drum 3.
To wrap the outer loading ring 7 clockwise, as shown in FIG.
3 rotate counterclockwise at the same time by approximately half a rotation, so the tape 2 rotates around the guide roller 5a and the inclined post 6.
The guide roller 5b and the guide post 8 rotate to wrap around the drum 3 from the left and right, but prior to this, the contact avoidance post 12a, 12t) is rotated from the side of the drum 3 due to the operation of the double-ended ring 7.130. The tape 2 is then wound around the drum 3.

The operations of the raising and lowering mechanisms 14a and 14b are as shown in FIG. 3 with the raising mechanism 14b. As the internal loading ring 13 rotates and advances in the direction of the arrow from the returned state as shown in FIG.
The arm member 17b1 resists the tension of the torsion spring 20, that is,
Since the contact avoidance post 12b is pushed down, the tape 2 is stretched by the guide posts 4b and 4a and comes into contact with the drum 3, and is then hooked onto the guide roller 5b and wound around the drum 3, as shown in FIG. On the other hand, the avoidance boss N2b is completely collapsed because the roller 18 rides on the cam 21.

In addition, in order to enter the fast forwarding or rewinding state, the roller 1 is rotated in the direction opposite to the arrow B of the internal loading ring 13.
8 falls into the valley of the cam 21, the contact avoidance post 12b rises due to the restoring force of the torsion spring 20, and the tape 2
is isolated from the drum 3 in cooperation with the contact avoidance post 12a.

Incidentally, the raising/lowering mechanism 148 simultaneously performs a similar operation by rotating the external loading ring 7 to raise the contact avoidance post 12a.

Next, a second embodiment will be explained based on FIGS. 4 and 5.

In this embodiment, the contact avoidance boss is operated by a link mechanism.

Figure 4 shows the state during fast forwarding and rewinding, and 23a
, 23b is a support stand 24a 924b installed upright on the housing 15
Elevated guide rails 25a, 25bid, which are fixed to the guide rails 25a and 25bid, respectively, and project and extend to the required positions.
A link mechanism that holds contact avoidance bosses 12a and 12b that reciprocate while being guided by 4a and 24b, respectively.
The structure is such that the required rotation is performed by rotating the external and internal loading rings 7.13.

Therefore, the link mechanism 25a is rotated in the A direction and the B direction of the double-ended ring 7.13.

25b rotates outward, and the elevated guide rails 2
3a and 23b to move the tape 2 out of the moving box opening as shown in FIG.

Next, a third embodiment will be described based on FIGS. 6 and 7.

In this embodiment, the contact avoidance post 12b is replaced by a contact avoidance roller 12r which also serves as the guide roller 10, as shown in FIG. 6, which shows the tape loading state during fast forwarding and rewinding. The avoidance roller 12r is positioned at the position of the guide roller 10 when the tape is loaded during recording and reproduction as shown in FIG. Therefore, if the roller angle conditions are the same, the number of parts can be reduced in this way.

〔Effect of the invention〕

As explained above, the present invention is configured to include a contact avoidance post that automatically isolates the tape from the drum during fast forwarding and rewinding, so fast forwarding and rewinding can be performed quickly without causing damage to the tape. There is an effect.

[Brief explanation of drawings]

Fig. 1 is an overall plan view showing the state during fast forwarding and rewinding of the first embodiment of the present invention, Fig. 2 is a plan view showing the state during recording and reproducing, and Fig. 3 is a plan view showing the state during contact avoidance. FIG. 4 is a side view illustrating the operation of the post debt issuing mechanism; FIG. 4 is a plan view showing the state during fast forwarding and rewinding of the second embodiment; FIG. 5 is a plan view showing the state during recording and reproduction; FIG. 7 is a plan view showing the state during fast forwarding and rewinding of the third embodiment, FIG. 7 is a plan view showing the state during recording and playback, and FIG. 8 is a plan view showing the fast forwarding and rewinding state of the conventional tape running system. FIG. 1...Tape cassette 2...Magnetic tape 3...Drum 12a...Contact avoidance guest 12b... Contact avoidance boss 12r...Contact avoidance roller Fig. 3 Fig. 4 Fig. 5 '3rd guest mv'a's flat ice, - @ return B science's 4x right and show 5+' face turn 6th &sIi of Figure 13 Actual example! 1:00 1:00 1:00 1:00 1:00 1:00 1:00 1:00 1:00 1:00 1:10
figure

Claims (1)

[Claims] A tape loading means for pulling out a magnetic tape from a tape cassette and winding it around a drum having a rotating magnetic head at a required angle; 1. A recording or reproducing apparatus comprising: a movable tape regulating means that releases the blocking in the finished state.