JPH04101903U - Rotating magnetic head drum device - Google Patents

Abstract

(57) [Summary] [Structure] The rotary transformer 60, in which the rotor 60a is bonded to the flange 50 and the stator 60b is bonded to the lower drum 20, has a surface coaxially facing the axis of the rotating drum 10 and a flat surface facing perpendicular thereto. It is integrally formed and has a large number of channels 65. When playing the signal,
A signal from the magnetic head 200 is transmitted to the rotary transformer rotor 60a via the conductors 210, 61 and the relay board 70, and further transmitted to the external circuit via the rotary transformer stator 60b. [Effect] Realizes multi-channel rotary transformer, and at the same time improves assembly efficiency and downsizes the device.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is based on the rotating magnetic head drive of a video tape recorder (hereinafter referred to as VTR). related to system equipment.

0002

[Conventional technology]

In conventional VTRs, a magnetic head is used to record and play back signals from magnetic tape. and a rotary transformer for transmitting the signal to the outside. magnetic Heads are noisy due to playback and downsizing of VTRs, and rotating magnetic head drum equipment. Due to the miniaturization of equipment, their number tends to increase. For this purpose, the rotor that transmits the signal is The number of channels in the digital transformer increases, and as shown in Figure 2, all channels are When trying to accommodate the flannel in a pair of flat plate facing rotary transformers 80a and 80b, , which leads to increased crosstalk between each channel and increased changes in inductance. All channels are housed in a pair of coaxial rotary transformers 90a and 90b. If you try to do this, the length of the coaxial rotary transformer will be large, making it difficult to realize. Become. Therefore, as shown in FIG. A structure that accommodates a channel by using two shaft rotary transformers 90a and 90b together. It had become a reality.

0003

[Problem that the idea aims to solve]

The conventional rotating magnetic head drum device described above is divided into two rotary transformers. Since the rotary transformer is constructed with two parts, it is necessary to assemble the rotary transformer twice. It takes a lot of man-hours to set up. Also, in order to fix the two rotary transformers, many Since parts are required, there are problems such as the inability to downsize the device.

0004

[Means to solve the problem]

The rotating magnetic head drum device of the present invention is attached to a rotating drum and records magnetic tape. a magnetic head for recording and reproducing data; a surface coaxially facing the axis of the rotating drum; is integrally formed with a flat plate facing surface perpendicular to the magnetic head, and is capable of fixing signals from the magnetic head. A rotary transformer consisting of a rotor and a stator and the magnetic A conductor and a relay board for transmitting signals between the head and the rotary transformer. We are prepared.

[0005]

【Example】

Next, the present invention will be explained with reference to the drawings.

[0006] FIG. 1 is a sectional view showing an embodiment of the present invention.

[0007] This embodiment is a magnetic head that is attached to a rotating drum 10 and performs recording and reproduction on a magnetic tape. The head 200, the surface coaxially facing the rotating shaft 40 of the rotating drum 10, and the surface perpendicular thereto. The magnetic head 200 is integrally formed with the flat opposing surface, and transmits the signal from the magnetic head 200 to the fixed side. Rotary transformer rotor 60a and rotary transformer stator 60b A rotary transformer 60 consisting of a magnetic head 200 and a rotary transformer 6 0 and conductors 61, 210 and a relay board 70 for transmitting signals between them. Ru.

[0008] In this embodiment, the rotary transformer 60a has a flange 5. 0, and the rotary transformer stator 60b is glued to the lower drum 20. is glued to. This rotary transformer 60 has many channels 65. During signal reproduction, the signal from the magnetic head 200 is transmitted through the conductor 210 to the relay base. The rotary transformer passes through the plate 70 and passes through the conductor 61 on the rotary transformer side. It enters the rotary transformer stator 60a, is transmitted to the rotary transformer stator 60b, and then is transmitted to the external circuit. (not shown). When recording a signal, the signal is transmitted along the opposite path. .

[0009]

[Effect of the idea]

As explained above, in this invention, the coaxial opposing surface of the rotary transformer and the flat opposing surface Since the surfaces are integrally formed, the number of man-hours during assembly can be reduced, and the number of parts is also small. Therefore, the size of the rotating magnetic head drum device can be reduced regardless of the number of channels. It has the effect of

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view of an example of a conventional rotating magnetic head drum device.

[Explanation of symbols]

10 Rotating drum 20 Lower drum 40 Rotation axis 50 flange 60a rotary transformer rotor 60b rotary transformer stator 70 Relay board 80a flat plate opposed rotary transformer rotor 80b flat plate opposed rotary transformer stator 90a coaxial rotary transformer rotor 90b coaxial rotary transformer stator 200 magnetic head

Claims (1)

[Scope of utility model registration request] 1. A magnetic head attached to a rotating drum for recording and reproducing information on a magnetic tape, a surface coaxially facing the axis of the rotating drum, and a flat facing surface perpendicular thereto, integrally formed; A rotating magnetic field characterized by comprising a rotary transformer including a rotor and a stator to transmit signals from the head to a fixed side, and a conductor and a relay board for transmitting signals between the magnetic head and the rotary transformer. Head drum device.