JP2600498B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a helical scan type magnetic recording / reproducing apparatus, and more particularly to an improvement of an impedance roller in a tape running system.

[0002]

2. Description of the Related Art FIG. 5 is a schematic diagram showing an example of a tape running system of a conventional magnetic recording / reproducing apparatus. In the drawing, a tape 3 pulled out from a supply-side reel 2 of a cassette 1 is tension-controlled by a back tension 4, guided from a guide pin 5 to an impedance roller 6, and a slant pin 7a and a guide roller 7b of a supply-side tape pull-out member 7. Is wound around the rotating drum 8. Further, the tape 3 that has exited the rotary drum 8 is wound around the tension lever 10 by the guide roller 9a and the slant pin 9b of the take-up side tape pull-out member 9. The tape 3 which has come out of the tension lever 10 is an A / C head 11
And wound around a pinch roller 13 via a guide pin 12, and wound around a take-up reel 15 via a roller 14 in the cassette. In the figure, reference numeral 16 denotes a capstan.

The conventional impedance roller 6 has a structure in which the roller has inertia in order to stabilize the running of the tape. Therefore, in a camera-integrated VTR in which restrictions on storage space, weight, and the like are important, the impedance roller must be as compact and lightweight as possible and have large inertia. In a general arrangement, the impedance roller 6 is located in front of the supply-side tape pull-out member 7. Even if it is provided on the take-up side, the camera-integrated VTR has a very strict mechanical structure due to restrictions on light weight and compactness. In addition, the surface of the impedance roller 6 has a structure that hits the entire width of the tape 3 as shown in FIG.

[0004]

Since the conventional magnetic recording / reproducing apparatus is constructed as described above, the impedance roller 6 hits the entire width direction of the tape 3 and thus has a problem in weight and capacity. Even if an attempt is made to configure the impedance roller 6 on the take-up side, there is a problem in terms of space and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has a magnetic recording / reproducing apparatus provided with an impedance roller which can reduce the weight and size of the roller and can be efficiently configured on the take-up side with less space. The purpose is to gain.

[0006]

In the magnetic recording / reproducing apparatus according to the present invention, the impedance roller is disposed on the take-up side, and the roller length of the impedance roller is smaller than the tape width so that the impedance roller hits the center of the tape. It is like that.

[0007]

According to the present invention, the arrangement of the impedance roller on the take-up side is realized, and the stable running of the tape and the jitter are reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic diagram showing a tape running system, and FIG.
FIG. 3 is an enlarged view showing the impedance roller of FIG. 1, and FIGS. 3 and 4 are explanatory diagrams of the operation of the impedance roller of FIG. 1. .

In FIG. 1, reference numeral 17 denotes an impedance roller disposed between the guide roller 9a of the take-up side tape pull-out member 9 and the slant pin 9b. It is lowered and hits the outside of the tape 3. The angle at which the impedance roller 17 winds around the tape 3 is determined by the tip of the arm 19 hitting the stopper 20. In order to use space effectively, the shape of the arm 19 is changed to the take-up side tape pull-out member 9.
Has a shape similar to the shape of the slide groove 21 that moves during loading and unloading. Then, in order to apply the plastic roller 22 constituting the surface of the impedance roller 17 to the center of the tape 3, the solid cast 23 of the sheet metal disk is detachably fitted over the plastic roller 22 like a cartridge type, so that the impedance is increased. The roller 17 is made compact.

As a method of applying the impedance roller 17 to the tape 3, at the time of loading shown in FIG. 3, the plastic roller 22 of the impedance roller 17 is pushed outward by the guide roller 9a around which the tape 3 is wound. The method is applied to the tape 3 as shown in FIG. When the guide roller 9a and the impedance roller 17 come into contact with each other, the roller 22 of the impedance roller 17 has a shape such that it hits only the center of the tape 3 as described above in order to eliminate tape damage due to mutual damage.

The supply-side impedance roller 6 may have the same configuration as the take-up side impedance roller 17.

[0012]

As described above, according to the present invention, when the impedance roller is constructed, the space can be reduced as much as possible, the weight can be reduced, and the traveling speed can be reduced by efficiently disposing the impedance roller on the take-up side. And the effect that jitter is easily reduced is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view of a tape running system showing one embodiment of the present invention.

FIG. 2 is an enlarged view showing the impedance roller of FIG. 1;

FIG. 3 is an operation explanatory diagram of the impedance roller of FIG. 1;

FIG. 4 is an operation explanatory diagram of the impedance roller of FIG. 1;

FIG. 5 is a schematic diagram showing a tape running system of a conventional magnetic recording / reproducing apparatus.

FIG. 6 is an enlarged view showing the impedance roller of FIG. 5;

[Explanation of symbols]

 Reference Signs List 1 cassette 3 tape 4 back tension 5 guide pin 6 impedance roller 7 supply side tape pull-out member 7a slant pin 7b guide roller 8 rotating drum 9 take-up side tape pull-out member 9a guide roller 9b slant pin 10 tension lever 11 A / C head 12 Guide pin 13 Pinch roller 16 Capstan 17 Impedance roller 19 Arm

Claims (1)

(57) [Claims] In a tape traveling system for extracting a tape from a cassette, winding the tape around a rotating drum, and winding the tape around the cassette, an impedance roller is disposed on a take-up side, and the length of the impedance roller is determined by the tape width. A magnetic recording / reproducing apparatus characterized in that the magnetic recording / reproducing apparatus is also made smaller so as to hit the center of the tape.