JPS63247909A - Rotary magnetic head device for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To eliminate foreign matters attached on the surface of a magnetic head, by rotating an impeller by a driving device which rotates the magnetic head, and jetting or attracting the air from the hole of a ventilating pipe arranged oppositely to the magnetic head by the impeller. CONSTITUTION:The impeller 10 is fixed on a rotary shaft 4, and is rotated integrally with the rotary shaft 4 by the rotational driving force of a motor 6. By the rotation of the impeller 10, an air flow is generated in the inside of a cover 11, and the air flows in a direction of arrow head, then, is entered to the ventilating pipe 12, and is jetted from a nozzle 123. A jetted air flow collides with the surface of the magnetic head 7 when it is confronted with the nozzle 123, and eliminates magnetic powder or the foreign matters attached on the surface of the head 7. Therefore, it is possible to manufacture the rotary magnetic head device for a magnetic recording and reproducing device capable of recording and reproducing information exactly.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to magnetic recording and reproducing devices such as video tape recorders and digital audio tape recorders that record and reproduce video signals, audio signals, etc. on tape-shaped magnetic recording media. This invention relates to an improvement of a rotating magnetic head device of an apparatus.

[Conventional technology]

FIG. 2 is a vertical cross-sectional view showing a conventional conductive magnetic head device of a video tape recorder. In the figure, (1) is a chassis, and (2) is a lead groove for guiding a tape-shaped magnetic recording medium (not shown). (21) and the above chassis (1) J
The lower drum (3) is fixed to the lower drum, the upper drum (3) rotates together with the rotating shaft (4), and the rotary shaft (4) is rotatably supported by 5J with respect to the lower drum (2). bearing,
(6) is a motor that is a drive device that rotationally drives the rotating shaft (4), (61) is a stator portion of this motor (6), (6
2) is the rotor part, (7) is the head mounting plate (8) fixed to the upper drum (3); n 2 knees;
m 5 head-IQI t-rm 'iK head-17
This is a rotary transformer that transmits and receives recording and reproduction signals between the signal processing device of the fixed part and the signal processing device of the fixed part.

I will explain the 401 works of Natsuko Tsugi. When the rotary shaft (4) is rotated by the motor (6) ζ, the magnetic head (7) is attached to the lower drum (2). Information is recorded on a medium, or information already recorded on a tape-shaped magnetic recording medium is reproduced.

[Problem that the invention seeks to solve]

The conventional rotary magnetic head device is constructed as described above.Magnetic particles of the tape-shaped magnetic recording medium generated when the magnetic head (7) slides 11+contact I,
Other foreign matter may adhere to the surface of the magnetic head (7).
T1. This creates a gap between the surface of the tape-shaped magnetic recording medium and the surface of the magnetic head, resulting in a problem in that the attack signal cannot be recorded or reproduced normally.

This invention was created by making a hole in the conventional device to solve this problem, and it is possible to prevent magnetic particles and other foreign matter from the recording medium from forming on the surface of the magnetic head. remove,
It is an object of the present invention to provide a rotating magnetic head device for a magnetic recording/reproducing device that can normally record and reproduce information signals.

(Means for Solving the Problems) A rotating magnetic head device according to the present invention has a magnetic head that is
The driving device ζ thus rotates the impeller, and the impeller ★ injects air from the mouth of the ventilation pipe placed opposite the magnetic head so as to suck the air.
It is strained.

[Effect]

The ventilation pipe in this invention either injects air into the magnetic head or sucks air from the magnetic head to remove magnetic particles and other foreign matter adhering to the surface of the magnetic head.

[Embodiments of the invention]

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

In Fig. 1-8, the same parts as in the conventional one in Fig. 2 are given the same signals and their explanations are omitted. Fixed impeller, (11
) is a cover that collects and sends the air sent from the impeller (1o), and covers the air outlet (till). (12) is a ventilation pipe'), and one end (123,) is a cover (1
1) connected to the air outlet (111) of the n1 impeller (10
) and are placed in communication with each other.

The other end (, 12) of the ventilation pipe (12) is the magnetic head (7)
The rotational paths of l and gS are arranged in tandem with each other, and in this embodiment fJ, the other end of which is constituted by a nozzle (123),
I'm here. (IOI) is the other end (,
12)))

Next, the operation ζ will be explained.

In Fig. 1, the impeller (10) is fixed to the rotating shaft (4), and the rotating shaft (4) is driven by the motor (6) (JJ rotational driving force).
) rotates in unison with the The rotation of the impeller (10) generates an air flow inside the cover (11), which flows into the ventilation pipe (12) with driftwood in the direction of the arrow, and flows through the nozzle (123).
◇When the magnetic head (7) faces the nozzle (13), it hits the surface of the magnetic head (7), causing the magnetic head (7) to blow out. ) to remove magnetic particles and other foreign matter adhering to the surface. If the nozzle (123) is installed in a range where the magnetic head (7) does not come into sliding contact with the tape-shaped magnetic recording medium, the It is preferable that the magnetic head (7) can also be cleaned, but even if it is provided in the sliding contact range, cleaning can be performed when the tape-shaped magnetic recording medium is not hung on the rotating magnetic head device, so this special number is preferable. No problem.

In addition, although the case where air is injected from the nozzle (123) was described in the above embodiment, the impeller (10)! Therefore, a reverse air flow may be generated to draw air from the nozzle (123). In addition, an impeller (1
0) provides sufficient airflow, the nozzle (
123) may be omitted. The rounded nozzle (123) may be formed by tapering the end of the ventilation tube (12).

〔Effect of the invention〕

As described above, this invention is capable of injecting air onto the surface of the magnetic head or sucking air from the surface of the magnetic head using the air flow formed by the impeller I that rotates by the driving force of the driving device for the magnetic head. By doing so, it is possible to remove magnetic particles and other foreign substances fused on the surface of the magnetic head, and there is an effect that a rotary magnetic head assembly Δ of a magnetic recording/reproducing apparatus that can accurately record and reproduce information q) can be obtained.

Further, since the impeller is rotated by the rotating shaft of the rotary magnetic head device, a dedicated drive device is not required.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a rotating magnetic head device according to the present invention, and FIG. 2 is a longitudinal sectional view showing a conventional rotating magnetic head device. In Figure 3, (4) is the rotating shaft, (6) is the drive device (motor), (7) is the magnetic head, (,10) is the impeller, (
12) is a ventilation pipe, (121) is one end thereof, (12)) is the other end, and (123) is a nozzle. In addition, the same reference numerals in the figures indicate the same parts or corresponding parts. Agent: Masuo Oiwa, Patent Attorney Figure 1, Figure 2 Figure 5 ν

Claims (2)

[Claims] (1) In a rotating magnetic head device of a magnetic recording and reproducing device, which includes a rotating shaft, a magnetic head that rotates together with the rotating shaft to record and reproduce information on a tape-shaped magnetic recording medium, and a drive device that rotates the rotating shaft. , an impeller that rotates integrally with the rotation shaft, and a ventilation pipe whose one end is disposed facing the rotation path of the magnetic head and whose other end is disposed in communication with the impeller; 1. A rotating magnetic head device for a magnetic recording and reproducing apparatus, characterized in that a jet air flow is ejected toward a magnetic head through a ventilation pipe, or a suction air flow is formed to draw air from the magnetic head. (2) A rotating magnetic head device for a magnetic recording/reproducing apparatus according to claim 1, wherein the other end of the ventilation pipe is constituted by a nozzle.