JPS61177621A - Rotary magnetic head device - Google Patents

Abstract

PURPOSE:To provide a drum horizontally to facilitate designing and assembling by rotating a magnetic head together with a supporting rod synchronously with the rotation of the rotary drum and moving the magnetic head vertically in a window in accordance with oscillation of the supporting rod due to oscillating means simultaneously. CONSTITUTION:Not only a capstan and a rotary drum 13 are driven to a magnetic tape T but also driving signals are supplied to piezo-electric elements 18 and 19 through a driving circuit 26 to expand and contract them, thereby moving vertically rotary magnetic heads 21 and 22. By relative motions of heads 21 and 22 and the tape T, heads 21 and 22 trace the surface of the tape T in an oblique direction to form a helical recording track on the tape T, and information is reproduced from the helical recording track. Thus, fixed and rotary drums are installed horizontally to facilitate designing and assembling.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention records and reproduces information on a magnetic tape so as to form recording tracks in a helical pattern inclined at a constant angle with respect to the running direction of the magnetic tape. The present invention relates to a rotating magnetic head device.

Summary of the Invention The present invention provides a rotating magnetic head device in which a magnetic head support rod is provided horizontally within a rotating drum, has a magnetic head fixed to both ends, and rotates together with the rotating drum. The magnetic head is brought into contact with the magnetic tape surface through a window provided in the side wall surface of the rotating drum, and the magnetic head support rod is moved by a swinging means provided in the rotating drum. By swinging the rotating core support rod of the magnetic tape, the magnetic tape is caused to run in a horizontal state.

<Prior Art> Generally, in this type of magnetic head device, as shown in FIGS. 6 and 7, a rotary drum 2 housing magnetic heads 3 and 4 is rotated on a fixed drum 1, and the outer peripheral surface of the fixed drum 1 is rotated. By running the magnetic tape 6 along the lead 5 formed with an inclination angle α, an eighth
A recording track T with a constant inclination angle Q as shown in the figure
It is designed to record and reproduce information in the form of...

<Problems to be Solved by the Invention> Therefore, in this conventional device, it is necessary to install the fixed drum 1 and the rotary drum 2 at an angle corresponding to the inclination angle α of the lead 5 with respect to the main chassis (not shown). Furthermore, in order to run the magnetic tape stably without twisting, it is necessary to provide inclined posts 7.8 at the front and rear of the fixed drum 1 at the same angle as the above-mentioned angle α, which makes the design and assembly very difficult. It had the disadvantage of being difficult.

<Means for Solving the Problems> The present invention was invented in view of the drawbacks of the above-mentioned conventional devices, and is provided in the rotating drum by rotating the rotating drum on the fixed drum. A rotating magnetic head records and reproduces information on a magnetic tape by sequentially forming recording tracks inclined with respect to the running direction of the magnetic tape, in which a magnetic head support rod is provided horizontally within the rotating head; The magnetic head is provided so as to be able to swing up and down with an axial center as the center of rotation, and magnetic heads are fixed to both ends of the magnetic head support rod, and the magnetic heads are connected to the magnetic head through a window provided on the side wall surface of the rotating drum. The rotating drum is configured to be able to come into sliding contact with the recording surface of the tape, and a swinging means for swinging the magnetic head support rod at a predetermined speed is provided in the rotating drum, and the magnetic head support rod is moved in accordance with the rotation of the rotating drum. A rotating magnetic head configured to rotate the magnetic head together with a rod in synchronization with a rotating drum, and to move the magnetic head up and down within the window by swinging the magnetic head support rod in conjunction with the operation of the swinging means. The present invention is intended to overcome the drawbacks of the conventional apparatus by providing an apparatus. Embodiment An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

1 and 2 show schematic top and front views of a rotary magnetic head device according to the present invention. In the figures, reference numeral 11 denotes a stationary drum whose upper edge is a horizontal reed 12. FIG.

Reference numeral 13 denotes a rotary drum which is installed on the upper surface of the fixed drum 11 so as to be horizontally rotatable and is connected to a drive motor (not shown) through a rotary shaft 14. The tape guide surface 15 is swollen into a shape, and window holes 16 and 17 are provided at two opposing locations on the tape guide surface 15, sandwiching the rotating shaft 14 therebetween.

18.19 is a piezoelectric element fixed to the bottom surface of the rotary drum 13 at equal intervals from the rotary shaft 14 along a line connecting the window holes 16.17 in the center of the rotary drum 13. The elements 020 are supplied with drive signals of opposite polarity at a constant period and are expanded and contracted by the drive signals.
The rotary magnetic heads 21, 22 are attached to the window hole 1 by using a head shaft with rotating magnetic heads 21, 22 fixed to both ends.
6.17 and avoids the rotating shaft 14 with the relief part 20a.
The presser shaft 23 is fixed on the piezoelectric element 18 and 19 (see FIG. 3) and is suspended from the ceiling surface of the rotating drum 13.
By engaging the lower end of the piezoelectric element 1 with the center part,
8. With the expansion and contraction of 19, a seesaw movement can be performed using the lower end of the presser shaft 23 as a fulcrum (see FIG. 4).

This swinging motion of the head shaft 20 causes the rotating magnetic head 21 to
．． 22 is a tape guide surface 150 inside the window holes 16 and 17.
It can move up and down along an arc.

T is a magnetic tape, which runs horizontally on the tape guide surface 15 of the rotating drum 13 along the lead 12 on the fixed drum 11 when a capstan (not shown) and the rotating drum 13 rotate.

24 and 25 are rotating posts that stabilize the running of the magnetic tape T.

Since the present invention is configured like a ridge, the capstan and rotating drum 13 are driven to run the magnetic tape T, and the piezoelectric element 18 is driven through the drive circuit 26.
．． When a drive signal is supplied to the piezoelectric element 18.19 to expand and contract the piezoelectric element 18.19 and move the rotary magnetic head 21.22 up and down, the rotary magnetic head 21.22 becomes magnetic due to the relative movement between the magnetic tape T and the rotary magnetic head 21.22. The magnetic tape T is traced diagonally, so that a helical recording track A as shown in FIG. 5 is formed on the magnetic tape T, and information is reproduced from such recording track A.

When the magnetic tape T runs along the rotating drum 13, since the tape guide surface 15 is an arcuate surface, the magnetic tape T does not deviate downward, and in some cases, the lead 2 of the fixed drum 1 may becomes unnecessary.

Effects> Since the present invention is structured like a ridge, the fixed and rotating drums can be installed horizontally, and therefore,
This is an excellent invention that is easy to design and assemble.

[Brief explanation of drawings]

1 and 2 are top and front configuration diagrams of a rotating magnetic head device according to the present invention, FIGS. 3 and 4 are schematic diagrams and operation explanatory diagrams of the rotating magnetic head included in the above device, and FIG. 5 is a format diagram of a recording track formed on a magnetic tape by the same device as above, FIGS. 6 and 7 are top and front configuration diagrams of a conventional rotary magnetic head device, and FIG. FIG. 3 is a format diagram of formed recording tracks. 11: Fixed drum, 13: Rotating drum, 18 (19):
Piezoelectric element, 20: Head shaft, 21 (22): Rotating magnetic head. Agent Patent attorney Aihiko Fuku (2 others) 211HJ
H Ishihyasa Hezudo /I! 1st time &amp;

Claims (1)

[Claims] 1. By rotating a rotating drum on a fixed drum, a magnetic head provided in the rotating drum and rotating together with the rotating drum sequentially records information in a helical pattern on a magnetic tape. A magnetic head support rod is provided horizontally within the rotary head and is provided so as to be able to swing up and down with an axial center as the center of rotation, and a magnetic head support rod is provided at both ends of the magnetic head support rod. The magnetic heads are fixed and the magnetic heads can be brought into sliding contact with the recording surface of the magnetic tape through windows provided on the side wall surface of the rotating drum, and the magnetic head support rod is disposed within the rotating drum. A rocking means for swinging at a predetermined speed is provided, and as the rotating drum rotates, the magnetic head is rotated together with the magnetic head support rod in synchronization with the rotating drum, while supporting the magnetic head as the rocking means operates. A rotating magnetic head device configured to move the magnetic head up and down within the window by swinging a rod.