JPH0450665B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic recording/reproducing device.

Conventional configuration and its problems Conventional magnetic recording/reproducing device (hereinafter referred to as VTR)
will be explained using FIGS. 1 and 2.
When the cassette 9 is installed in the VTR, the tape guide 5 on the winding side (hereinafter referred to as the T side), the inclined post 3 on the T side, the tape guide 6 on the supply side (hereinafter referred to as the S side),
The S-side inclined post 4 pulls out the magnetic tape 20 in the direction of arrow A, wraps the magnetic tape 20 around the upper cylinder 1 and the lower cylinder 2, and attaches the magnetic tape 20 to the magnetic head 1.
Recording and reproduction are performed on the magnetic tape 20 by rotating the rotating body 14 provided with the magnetic tape 2 and 13. However, in order to downsize the VTR, in order to fit the cylinder part into the space E where the tape guides 5 and 6 that pull out the magnetic tape 20 of the cassette 9 are inserted, it is necessary to insert the magnetic tape wound around the cassette 9 when the cassette is installed. It is difficult to escape the collision between the 20 and the upper cylinder 1 and the lower cylinder 2, and in the end, it is difficult to make the depth of the VTR smaller than the sum of the drum diameters of the upper cylinder 1 and lower cylinder 2 and the cassette size. It was hot. In FIGS. 1 and 2, 7 and 8 are guide rollers, 10 is a supply reel, 11 is a take-up reel, and 15 is a rotating shaft.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and an object of the present invention is to provide a VTR that can further reduce the relative distance between the cassette and the upper and lower cylinders, thereby achieving further miniaturization.

Structure of the Invention In order to achieve the above object, the VTR of the present invention has the following features:
A rotating body installed so that the magnetic head is positioned on a circumferential orbit at a position lower than the bottom end of the magnetic tape when a cassette is attached; a lower cylinder placed below the rotating body and fixed on a substrate; , an annular upper cylinder disposed above the rotating body and having a portion removed along the axial direction, and when a cassette is installed, the removed portion of the upper cylinder and the magnetic tape face each other, and the tape When switching to the loading mode, the upper cylinder is rotated to a predetermined position where the magnetic tape can come into contact with the outer peripheral surface of the upper cylinder other than the removed portion, and is then fixed, and then the magnetic tape is transferred from the cassette by the tape guide. It is configured to be pulled out and wrapped around the outer circumferential surface of the upper cylinder other than the removed portion.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 3 to 7 show an embodiment of the present invention, and the same components as those shown in FIGS. 1 and 2 are given the same reference numerals and their explanations will be omitted. FIG. 3 is a schematic configuration diagram of a VTR. Reference numeral 16 denotes a capstan motor that has a capstan 17 and controls the feeding of the magnetic tape 20 by pressing a pinch roller 21 onto the capstan 17 via the magnetic tape 20. It is. 18, 19, 35, 2
2 and 24 are tape guides for pulling out the magnetic tape 20 from the cassette 9 and fixing it at a predetermined position;
25 and 26 are inclined posts. 34 is deleted part B
The removed portion B is located on the cassette 9 side when the cassette is installed. Figure 4 is the same
In the cross-sectional view of the cylinder of the VTR, reference numeral 15 denotes a rotating shaft that holds the upper cylinder 34 and is rotatably supported by the bearing D of the lower cylinder 2 fixed to the base plate 36, and has a gear 27. It is connected to a ding motor (not shown). 28 and 29 are rotary transformers that transmit the outputs of the magnetic heads 12 and 13; 32 is a magnet; and 33 is a coil, which imparts rotational motion to the rotating body 14. 30 and 31 are rotating bodies 1
4 is rotatably held in the lower cylinder 2.

Next, the operation will be explained. When the VTR is switched to tape loading mode, the upper cylinder 34 is rotated by the loading motor to the position shown in FIG. 5 and fixed, and the magnetic tape 20 is moved to position C. Next, the loading motor is switched, and the tape guides 18, 19, 35, 22,
24, the inclined posts 25 and 26, and the pinch roller 21 move along a predetermined movement path and are fixed. At this time, the rotating body 14 is rotating clockwise to protect the magnetic tape during tape loading. 6 and 7 respectively show the position of the magnetic tape 20 before and after tape loading. In FIG. In FIG. 7), the magnetic tape 20 is wound around the upper cylinder 34 and the lower cylinder 2 by tape guides 18, 19, 35, 22, 24 and inclined posts 25, 26.

Effects of the Invention As explained above, according to the present invention, by using the upper cylinder of emotion with a portion removed along the axial direction, the magnetic tape and the upper cylinder do not interfere when loading the cassette, and the loading mode Since tape loading is completed after the upper cylinder has rotated to a position where the outer peripheral surface other than the removed portion contacts the magnetic tape, the relative distance between the cassette and the cylinder can be reduced. The device can be made smaller. In addition, when loading a cassette, the magnetic head is placed at a position lower than the bottom edge of the magnetic tape, and once tape loading is complete, the height of the magnetic tape is adjusted using a tilted post, thereby creating an escape for the magnetic tape only in the upper cylinder. The motor section of the cylinder can be arranged as before, and the lower cylinder is fixed on the board as before, so it is possible to have a configuration that is stable in terms of accuracy.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of a conventional VTR in a tape loading state, Fig. 2 A is a schematic plan view of the cylinder section of the VTR, Fig. 2 B is a schematic front view of the same,
3 is a schematic plan view of a VTR according to an embodiment of the present invention when the cassette is attached, FIG. 6 is a schematic front view showing the positional relationship between the magnetic tape and the cylinder when the cassette of the same VTR is installed, and FIG. 7 is a schematic plan view of the same VTR showing the magnetic tape when tape loading is completed. FIG. 3 is a schematic front view showing the positional relationship between the cylinder and the cylinder. 2...Cylinder, 9...Cassette, 12, 13
... Magnetic head, 14 ... Rotating body, 20 ... Magnetic tape, 34 ... Upper cylinder, 36 ... Substrate.

Claims (1)

[Claims] 1 A rotating body installed so that the magnetic head is positioned on a circumferential orbit at a position lower than the bottom end of the magnetic tape when the cassette is attached, and a lower cylinder located below this rotating body and fixed on the board. and an annular upper cylinder arranged above the rotating body and having a portion removed along the axial direction, and when a cassette is attached, the removed portion of the upper cylinder and the magnetic tape face each other, When the upper cylinder is switched to the tape loading mode, the upper cylinder is rotated to a predetermined position where the magnetic tape can come into contact with the outer peripheral surface of the upper cylinder other than the removed portion, and is then fixed, and then the magnetic tape is loaded into the cassette by the tape guide. A magnetic recording/reproducing device configured to be pulled out from the upper cylinder and wrapped around the outer circumferential surface of the upper cylinder other than the removed portion.