JP2927060B2 - 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 magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art In recent years, magnetic recording / reproducing apparatuses such as cassette type video tape recorders have become smaller and lighter and have a structure in which the plane area of a mechanism device is reduced by making a rotary cylinder enter a cassette opening. It is becoming mainstream.

A conventional magnetic recording / reproducing apparatus will be described below with reference to FIGS. When the cassette 1 is mounted on the magnetic recording / reproducing apparatus, the S-side roller posts 2 and S
The side inclined post 3, the T side roller post 4, and the T side inclined post 5, pull out the magnetic tape 6 in the direction of arrow A, wind the magnetic tape 6 around the cylinder 7, and rotate the rotating body 11 provided with the heads 9, 10. The magnetic tape 6
Recording and reproduction are generally performed.

However, in the magnetic recording / reproducing apparatus in such a state, the cassette 1 and the cylinder 7 need to be close to each other because of the relationship between the cassette 1 and the cylinder 7 and the relationship between the cassette 1 and the cylinder 7. However, there is an inevitable limit to the size reduction due to the above, and there has been a problem that the size cannot be sufficiently reduced. In addition, 12 and 13 are guide posts, 14 and 15 are reels, and 16 is a shaft.

[0005]

However, the above-mentioned conventional arrangement has a problem that the plane area of the mechanism is determined by the cylinder and the cassette, and it is difficult to further reduce the size.

The present invention solves the above-mentioned conventional problems. When a cassette is held and a tape is loaded, a sub-substrate that slides toward a cylinder is not required, and the relative distance between the cassette and the cylinder is further increased. It is an object of the present invention to provide a magnetic recording / reproducing device that is reduced in size and thickness.

[0007]

In order to achieve this object, a magnetic recording / reproducing apparatus according to the present invention comprises: a rotating body in which a magnetic head rotates on a circumferential orbit; A lower cylinder fixed on a substrate and having a lead arranged so that a magnetic tape is wound around a cylindrical surface in a helical manner, and a lower cylinder disposed above a rotating body and partially along an axial direction; Is removed, the magnetic tape is pulled out of the cassette, the tape guide post is wound around the rotating body, the lower cylinder and the upper cylinder at a predetermined angle, and the cassette holder descends in conjunction with the winding operation of the tape guide post. When the cassette is mounted on the cassette loading device, the deleted portion of the upper cylinder and the magnetic tape face each other, and the cassette holder has the predetermined first height. Then, the upper cylinder is rotated and fixed to a predetermined position where the outer peripheral surface other than the deleted portion and the magnetic tape can contact with each other, and then the magnetic tape is pulled out of the cassette by the tape guide post and The cassette holder is configured to be wound around the outer peripheral surface other than the deleted portion, and at the same time, descend from the first height of the cassette holder to reach the second height.

[0008]

With this configuration, when the cassette is mounted on the cassette holder, the deleted portion of the upper cylinder and the magnetic tape face each other, and after the cassette loading device has been lowered to a predetermined first height, the upper cylinder is moved to the predetermined height. The magnetic tape is rotated and fixed to a predetermined position where the outer peripheral surface other than the deleted portion and the magnetic tape can abut, and then the magnetic tape is pulled out of the cassette by the tape guide post, and the outer peripheral surface of the upper cylinder other than the deleted portion is removed. At the same time as winding, it is configured to descend from the first height of the cassette loading device to reach the second height, so that the cylinder can be brought closer to the cassette.

[0009]

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

FIG. 1 is a schematic configuration diagram of a magnetic recording and reproducing apparatus according to an embodiment of the present invention. In the figure, reference numeral 3 denotes a capstan motor having a capstan 4 and driving the magnetic tape 2 in forward and reverse directions by pressing the magnetic tape 2 with a pinch roller 5 therebetween. Reference numerals 6, 7, and 9 denote a tape guide post which pulls out the magnetic tape 2 from the cassette 1 and is fixed at a predetermined position. Reference numeral 8 denotes an inclined post which functions to twist the tape. The tape guide posts 11, 32 are inclined posts provided on the substrate, and 13 is an upper cylinder having a deleted portion B. When the cassette 1 is mounted, the deleted portion B is located on the cassette 1 side. Reference numeral 14 denotes a tension regulator post that functions to detect the tension of the magnetic tape 2 during tape running and to control the tension to be constant.

FIG. 2 is a sectional view of a cylinder portion in the magnetic recording and reproducing apparatus. 15 in the figure is the upper cylinder 1
An upper cylinder shaft 18 which is rotatably provided by a bearing 16a of a lower cylinder 16 mounted on the substrate 12 and further has a gear 17 connected to a driving motor (not shown); , 19 are magnetic heads 2
Rotary transformers for transmitting output signals 0, 21;
Is a magnet and a motor coil of a motor unit which applies a rotational force to the rotating body 14 on which the magnetic heads 20 and 21 are arranged on the circumference, and 25 is a bearing provided for rotating the rotating body smoothly.

Next, the operation of the present apparatus will be described. First, FIG. 1 is a plan view showing a state where the cassette 1 is attached to the present apparatus, and FIG. 3 is a schematic side view.

Magnetic tape 2 in the opening of cassette 1
Is located further above the upper surface of the rotating body 24,
The cassette 1 is mounted at a position at a first height.

Next, when the mounting of the cassette is detected by a detection device (not shown), as shown in FIG.
Is rotated in the direction of arrow B by the drive motor and fixed. FIG. 5 shows a side view of the apparatus at that time. As a result, the magnetic tape 2 is pushed into the opening of the cassette 1 by the upper cylinder 13 (at the position at the first height).

Further, when the rotation operation of the upper cylinder 13 is completed, the drive motor is switched from the rotation drive mechanism of the upper cylinder 13 as shown in FIG. 6, and a tape guide holding the tape guide post 7 and the inclined post 8 is provided. The post base T28 moves and is fixed along the loading guide T26. In FIG. 7, the rotational force transmitted from the driving motor is transferred to the loading gear B33 having a worm wheel via the loading gear A30, and the helical loading is formed on the outer periphery of the flexible wire. The information is transmitted to the wire 31. When the loading wire 31 rotates, the loading operation is performed by the screw portion 28a formed on the loading guide post base T28.

The tape guide post S29 is loaded by a similar mechanism. Here, while shifting from the state of FIG. 5 to the state of FIG. 8 (FIG. 9) in which the loading is completed, the first direction in the arrow C direction is synchronized with the unillustrated cassette holder loading operation holding the cassette 1. From the first height to the second height.

[0017]

As described above, according to the present invention, the upper cylinder, which is partially notched, is rotated. The cylinder is overlapped in the cassette, and the relative distance to the cylinder is set small. be able to. Further, since the cassette is lowered in conjunction with the loading operation, the thickness can be significantly reduced as compared with a case where the cassette is not lowered.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a magnetic recording / reproducing apparatus according to an embodiment of the present invention when a cassette is mounted.

FIG. 2 is a schematic sectional view of a cylinder part of the apparatus.

FIG. 3 is a schematic side view of the apparatus when a cassette is mounted.

FIG. 4 is a schematic plan view of the device after rotation of an upper cylinder.

FIG. 5 is a schematic side view of the device after rotation of an upper cylinder.

FIG. 6 is a schematic plan view when the loading of the apparatus is completed.

FIG. 7 is a schematic view showing a loading mechanism of the apparatus.

FIG. 8 is a schematic side view of the apparatus when loading is completed.

FIG. 9 is a schematic side view of the apparatus when loading is completed.

FIG. 10 is a schematic plan view of a conventional magnetic recording / reproducing apparatus in a loading state.

FIG. 11 is a plan view of a cylinder section of the device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cassette 2 Magnetic tape 6,7 Tape guide post 13 Upper cylinder 16 Lower cylinder 24 Rotating body

Claims (1)

(57) [Claims] 1. A rotating body in which a magnetic head is arranged to rotate on a circumferential orbit, and a magnetic tape is arranged below the rotating body and formed so that a magnetic tape is wound helically on a cylindrical surface. A lower cylinder fixed on a substrate having a lead, an upper cylinder disposed above the rotating body and partially removed along an axial direction, and pulling out the magnetic tape to the outside of the cassette. A rotating body, a tape guide post wound around the lower cylinder and the upper cylinder at a predetermined angle, and a cassette holder that descends in conjunction with the winding operation of the tape guide post, when the cassette is mounted on the cassette holder, After the deleted portion of the upper cylinder and the magnetic tape face each other, and the cassette loading device further descends to a predetermined first height, The cylinder is rotated and fixed to a predetermined position at which the outer peripheral surface other than the deleted portion and the magnetic tape can abut, and then the magnetic tape is pulled out of the cassette by the tape guide post, and A magnetic recording / reproducing apparatus, wherein the magnetic recording / reproducing apparatus is configured so as to be wound around an outer peripheral portion other than the deleted portion and to be lowered from the first height of the cassette holder to reach a second height.