JPH01264601A - Rotary magnetic head device - Google Patents

Abstract

PURPOSE:To eliminate the need for soldering work, etc., and to improve an assembly character by connecting a chip capacitor in parallel to an erasing head on a head connecting piece and making them in to an integrated construction. CONSTITUTION:The signal transmissions of an erasing head 1 and a rotary transformer 3 are executed by a head connecting piece 4 and a transformer 5, respectively. At the time of erasing a signal written onto a magnetic tape with a video head 8 by means of the erasing head and recording it by means of the video head 8 immediately, for the erasing current of the erasing head, the large current to be approximately ten-fold that of a video head recording current is needed, and a chip capacitor 2 having a prescribed capacitor capacity is fitted to the head connecting piece 4. The title device is a rotary magnetic head device equipped with the rotary transformer 3 to transmit the signal at a fixed cylinder 12, the head connecting piece 4 to be mounted on the rotary transformer 3 and to relay the signal and the erasing head 1 to be operated corresponding to the relayed signal, a resonance circuit is composed by connecting the chip capacitor 2 in parallel to the erasing head 1 on the head connecting piece 4, and the erasing of the video is executed by a head resonance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating magnetic head device of a magnetic recording/reproducing apparatus such as a video recorder, and particularly to a structure suitable for an erasing head circuit.

[Conventional technology]

As described in Japanese Patent Application Laid-open No. 55i53105, the conventional device connects a capacitor to the drive coil of the erasing head to form a parallel resonant circuit, and provides a changeover switch in the connection path to generate a small current. This made it possible to switch the drive current and increase the drive current.

[Problem to be solved by the invention]

The above-mentioned prior art relates to the circuit configuration, and the problem lies in the structure of the rotating magnetic head device to realize the circuit configuration. No consideration was given to the mounting position and structure of the capacitor for the resonant circuit in the rotary cylinder for the movie, which uses the head to reproduce one picture. Figure 6 shows the resonant circuit of the erasing head.■The resonant chip capacitor must be connected in parallel to the erasing head, and as shown in Figure 4, it consists of a head relay line and a transformer relay line, that is, a connector. If not used, install a relay board,
It took the form of mounting a resonant chip capacitor on the board. It is necessary to solder all the magnetic head relay lines and transformer relay lines in this part, which increases the number of work steps.

Therefore, connectors have been used to completely eliminate the soldering work described above. However, since a large number of magnetic heads are mounted in this case, we considered attaching a resonant chip capacitor to the magnetic head itself as shown in Figure 5, but the head terminal area was small and there were problems with the head coil and pattern bridge. Therefore, there was a problem that the resonant chip capacitor could not be attached.The purpose of the present invention is to provide a head connector structure that facilitates the attachment of the resonant chip capacitor of the erasing head and improves the assemblability of the rotating magnetic head device. It is about providing.

[Means to solve the problem]

The above objective problem is a rotary transformer that is equipped with a rotary transformer that transmits signals from a fixed cylinder, a head connector that is mounted on the rotary cylinder and relays the signal, and an erasing head that operates in response to the relayed signal. In a magnetic head device, this is achieved by connecting a chip capacitor on the head connector in parallel with the erase head.

[Effect]

With the above configuration), since the chip capacitor is mounted on the head connector, an integrated structure is possible, and the chip capacitor and the erasing head are connected in parallel to form a resonant circuit, and images are erased by head resonance.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. Signal transmission between the erasing head 1 and the rotary transformer 6 is performed through a head connector 4 and a transformer connector 5, respectively. When a signal written on a magnetic tape by the video head 8 is erased by the erasing head and immediately recorded by the video head 8, the erasing current of the erasing head needs to be about 10 times as large as the recording current of the video head. becomes. The resonant frequency f used there
r is represented by the following formula (1).

C: Capacitor capacity LP: Rotating transformer inductance Lll: Elimination Rad inductance Having a capacitor capacity determined by equation (1),
6 Chip capacitor 2 is attached to head connector 4. FIG. 2 is a sectional view of the assembled upper cylinder 11 and lower cylinder 12 shown in FIG.

According to this embodiment, it is possible to provide a rotary magnetic head device having a connector configuration, thereby improving assembly efficiency.

〔Effect of the invention〕

According to the present invention, since the chip capacitor for the resonant circuit has an integral structure mounted on the head connector in order to erase the image, a board for connecting the chip capacitor is installed on the upper cylinder, which is conventionally generally done. There is no need to solder, and when installing a chip capacitor, the work can be checked by checking the head connector alone, and the ease of assembling the upper and lower cylinders is improved, reducing man-hours.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of an embodiment of the present invention, and FIG. 5 is a circuit diagram of an erase head circuit.
FIG. 4 is a diagram showing the conventional embodiment, and FIG. 5 is a diagram showing the mounting of chip capacitors in the conventional embodiment.

Claims (1)

[Claims] 1. A rotating transformer that transmits signals from the fixed cylinder side,
In a rotating magnetic head device that is mounted on a rotating cylinder and includes a head connector that relays the signal, and an erase head that operates in response to the relayed signal, the head connector is mounted on the head connector in parallel with the erase head. A rotating magnetic head device characterized in that a chip capacitor is connected to the rotary magnetic head device.