JPH04241253A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce an impedance roller in weight and to make it compact and also to constitute the impedance roller efficiently on the take-up side of a small space in the magnetic recording and reproducing device. CONSTITUTION:The impedance roller 17 is disposed on the take-up side, and also the length of this impedance roller 17 is diminished smaller than the width of the tape 3 and brought into contact with the middle part of the tape 3, thus resulting in the stable traveling of the tape 3 and reducing jitters.

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 particularly to an improvement of an impedance roller in a tape running system thereof.

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 figure, the tape 3 pulled out from the supply reel 2 of the cassette 1 is tension-controlled by a back tension 4, guided from a guide pin 5 to an impedance roller 6, and guided by a slant pin 7a of a supply tape drawer member 7 and a guide roller 7b. is wound around the rotating drum 8. Furthermore, the tape 3 coming out of the rotating drum 8 is wound around the tension lever 10 by the guide roller 9a and slant pin 9b of the take-up side tape pull-out member 9. The tape 3 that has come out of this tension lever 10 is attached to the A/C head 11.
, passes through the guide pin 12 , wraps around the pinch roller 13 , passes through the cassette inner roller 14 , and is taken up on the take-up reel 15 . Note that 16 in the figure is a capstan.

The conventional impedance roller 6 has a structure in which the roller has inertia in order to stabilize tape running. Therefore, in a camera-integrated VTR where restrictions such as storage space and weight are important, impedance rollers must be as compact and lightweight as possible and have high inertia. Further, the impedance roller 6 is generally located in front of the supply side tape drawer member 7. Even if it is installed on the take-up side, the camera-integrated VTR has limitations on being lightweight and compact, so the mechanical structure will be extremely strict. Furthermore, by configuring the surface of the impedance roller 6 to contact the entire width direction of the tape 3 as shown in FIG. 6, it has the effect of suppressing jitter components.

0004

[Problems to be Solved by the Invention] Since the conventional magnetic recording and reproducing apparatus is constructed as described above, there are problems in terms of weight and capacity because the impedance roller 6 hits the entire width of the tape 3, and also there are problems in terms of weight and capacity. Even if an attempt was made to configure the impedance roller 6 on the take-up side, there were problems in terms of space and the like.

The present invention has been made to solve these problems, and provides a magnetic recording and reproducing device equipped with an impedance roller that can reduce the weight and size of the roller and can be efficiently configured on the take-up side where space is limited. The purpose is to obtain.

[0006]

[Means for Solving the Problems] A magnetic recording/reproducing device according to the present invention has an impedance roller disposed on the take-up side, and the length of the impedance roller is made smaller than the tape width so that the impedance roller hits the center of the tape. This is how it was done.

[0007]

[Operation] In the present invention, the impedance roller can be placed on the take-up side, and the tape can run stably and jitter can be reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Figure 1 is a schematic diagram showing the tape running system, Figure 2
is an enlarged view showing the impedance roller in FIG. 1, and FIGS. 3 and 4 are explanatory views of the operation of the impedance roller in FIG. .

In the figure, reference numeral 17 denotes an impedance roller disposed between the guide roller 9a and the slant pin 9b of the take-up side tape drawer member 9. It is lowered and hits the outside of the tape 3. The angle at which the impedance roller 17 wraps around the tape 3 is determined by the contact of the tip of the arm 19 with the stopper 20. In addition, in order to use space effectively, the shape of the arm 19 is changed to the shape of the take-up side tape drawer member 9.
The shape is similar to that of the slide groove 21 that moves during loading and unloading. In order to bring the plastic roller 22 that forms the surface of the impedance roller 17 into contact with the center of the tape 3, a sheet metal circular brass plate 23 is removably fitted above the plastic roller 22 like a cartridge type, thereby impeding the impedance roller 17. The roller 17 is designed to be compact.

As a method of applying the impedance roller 17 to the tape 3, as shown in FIG. 3, during loading, the plastic roller 22 of the impedance roller 17 is kicked outward by the guide roller 9a around which the tape 3 is wound, and when the loading is completed, As shown in the figure, the tape 3 is applied. Guide roller 9
When the impedance roller a and the impedance roller 17 come into contact with each other, the roller 22 of the impedance roller 17 contacts only the center of the tape 3, as described above, in order to prevent damage to the tape due to mutual scratches.

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

0012

As described above, according to the present invention, when configuring the impedance roller, the space can be omitted as much as possible, the weight can be reduced, and by efficiently arranging it on the take-up side, it is possible to improve the running performance. This has the effect of making it more stable and making it easier to reduce jitter.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a tape running system showing an embodiment of the present invention.

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

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

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

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

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

[Explanation of symbols]

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)

[Claims] Claim 1: In a tape running system that pulls out a tape from a cassette, wraps the tape around a rotating drum, and then winds it onto the cassette, an impedance roller is disposed on the take-up side, and the roller length of this impedance roller is made smaller than the tape width. A magnetic recording and reproducing device characterized in that the magnetic recording and reproducing device is made small so that it hits the center of the tape.