JPS59113554A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To set a relative length between a cassette and a cylinder to a small value to make the device small-sized, by turning upper and lower cylinders which are notched partially to overlap them on each other in the cassette. CONSTITUTION:Cylinders 17 and 18 are partially notched to have approximate D shapes in the cross-sectional view. A rotating body 11 provided with heads 9 and 10 is arranged between these cylinders 17 and 18, and they are inserted and fixed to a shaft 16 in the state where phases of notches of the upper cylinder 17 and the lower cylinder 18 are matched, and this shaft 16 is supported turnably on a substrate 20 through a bearing 19. When a cassette 1 is set to a magnetic recording and reproducing device, notched parts of upper and lower cylinders 17 and 18 are placed on the side of the cassette 1. In this state, an S- side roll post 2, an S-side inclined post 3, a T-side roll post 4, and a T-side inclined post 5 are moved in the direction of an arrow B to load the tape. At this time, upper and lower cylinders 17 and 18 are turned and are fixed.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a magnetic recording/reproducing device 6'.

Structure of a conventional example and its problems A conventional magnetic recording/reproducing apparatus will be explained with reference to FIGS. 1 and 2. Magnetic recording/reproducing device 9-bit cassette l-fl)
Q installed t 7r t, 5fJ41j roller +1e
7. ) (2), S fil inclined post (3),
T side low list t4), T side inclined post (5)
pull out the magnetic tape (6) in the direction of the arrow (A), wrap the magnetic tape (6) around the upper cylinder (7) and the lower cylinder (8), Generally, recording and reproduction are performed on the magnetic tape (6) by rotating the magnetic tape (6). However, in the magnetic recording/reproducing device θ in such a state, due to the relationship between the inside of the cassette, the upper cylinder 9' (7), and the lower cylinder (8), the cassette +1), the upper cylinder (7), and the lower cylinder (8) are closed. 8), there is inevitably a limit to miniaturization by bringing them closer to each other, and there is a problem in that it is not possible to achieve sufficient miniaturization. In addition, +12 C10 is a guide post, H
(g) is the reel, and peak a is the axis.

OBJECTS OF THE INVENTION The present invention aims to eliminate the above-mentioned conventional drawbacks, and to provide a magnetic recording device 11 which can further reduce the relative distance between the cassette and the upper and lower cylinders, and which can be made more compact. I get it.

H6 of the invention In order to achieve the above object, the magnetic recording/reproducing device 1 of the invention has an upper cylinder and a lower cylinder on a rotatable shaft.
At the same time, a rotary body equipped with a magnetic field and a magnetic field that performs recording and reproduction by contacting the magnetic tape is fitted onto the outside of the two cylinders so as to be freely rotatable in the gap between the two cylinders, and both the cylinders are cylindrical. It is formed into an abbreviated shape in plan view with a part of it cut out,
+rr+ A drive device is provided to rotate the recording shaft around the entire axis, and when a magnetic cassette is loaded, the cutout portions of both recording cylinders are attached to the magnetic cassette OI except during recording and playback.
：：＋However, during wiring and playback, the arcuate portions of both cylinders are located on the magnetic cassette housing.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 (4) is a plan view of the cylinder portion of the magnetic recording/reproducing device; Reference numerals are given and explanations thereof are omitted.

These cylinders σηa~ are formed in an abbreviated shape in plan view, with a part of a cylindrical cylinder cut away. These cylinder parts (to) are \rad(9)j
A rotary body (A is disposed between them) equipped with a rotary body (A), and is externally fixed to the shaft Ql with the notches of the upper cylinder (I7) and the lower cylinder (to) aligned in phase, This shaft α is rotatably supported by the board (A) via a bearing 0.The shaft Q is also rotated by an 11-wheel drive device (not shown) via a gear (2), etc. I am forced to give up.l
The it period rotating body Uυ is connected to the axis σ through the bearing (2).
The shaft is rotatably fitted onto the outside, and is driven in the same direction by a drive device (not shown). (c) is a rotary transformer.

As shown in FIG. 4, when the cassette (1) is installed in the magnetic recording/reproducing apparatus i'j, the cutout portions of the upper and lower cylinders a are located at the cassette 11)a. From this state, as shown in Figure 5, the S side roller post (2)
.

S side inclined post (3), T side 1 cola post f4
), the 'l' side inclined post (5) moves in the direction of the arrow to perform tape loading.The cylinder qη (to) below ttq, h moves from the position shown in Fig. 4 to the position shown in Fig. 5. The upper and lower cylinders 07) (G) (\L1) in Fig. 4 are rotated until they are fixed.
It is assumed that the J rolling body +11) is always contained within the upper and lower cylinders α7) (g).

In this way, the cassette (1) and the upper and lower cylinders (
17) Relative distance with Qlllll (1 can be made smaller, and upper and lower cylinders αη (to) during recording and playback
can be overlapped in the cassette (1).

It is preferable that the rotation of the lower cylinder αηQ barrel and the tape loading be performed by the same motor.

According to the present invention, the upper and lower cylinders are partially cut out and rotated, so that the cylinders overlap within the cassette, reducing the relative distance between the cassette and the cylinder. The magnetic recording/reproducing device can be made smaller. In addition, since it has a simple structure in which the cylinder and the rotating body with the rad share a common axis, it is possible to obtain sufficient accuracy of the cylinder (<1.ti). Not clear (,
Since it has a D-shape when viewed from above, it is designed to be convenient for public welfare.

[Brief explanation of the drawing]

Figure 1 shows a conventional magnetic recording/reproducing device in the tape loading state, a plan view of the cylinder section of the 21st center, and a cross-sectional view of the cylinder section of the 21st center. Figure 81 shows an embodiment of the present invention.
Figure 4 is a schematic plan view of an embodiment of the present invention (magnetic recording and reproducing apparatus) of the I-shaped boat equipped with a cassette q; It is a schematic plan view of the tape reading state of the apparatus. Camphor - lower cylinder,
8... Axis agent Yoshihiro Morimoto Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] l. The upper and lower cylinders are externally fitted and fixed on a rotatable shaft body, and a rotating body equipped with a magnetism/rad that contacts the magnetic tape to perform recording/reproduction is written rqjJ. The gap position between the two cylinders is fixed. The front A and both cylinders are formed into an abbreviated shape in plan view with a part of the cylindrical shape cut out, and a drive device δ rotates the -1 body around the axis (ζ).
When a magnetic cassette is installed in a magnetic cassette device, the notches g15 of both cylinders are located on the magnetic cassette side except during recording and playback, and the arcuate portions of both cylinders are located on the magnetic cassette side during recording and playback. A magnetic recording/reproducing device having a configuration located at.