KR100194046B1 - Rotary Transformer Assembly for Rotary Rotary Head Drum Unit - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

The present invention relates to a rotary transformer assembly of a rotary BC drum head device.

I. The technical problem to be solved by the invention.

The present invention is to provide a transformer assembly of a rotary head drum device for V-Cal which realizes a high quality without signal loss by directly transmitting the original signal picked up from the head as it is.

All. Summary of the Solution of the Invention.

The present invention relates to a rotary transformer assembly of a head drum device for a V-C, comprising: a transformer rotor configured to alternate between an insulator and a conductor at equal intervals in the circumferential direction; The transformer stator is placed facing each other with the transformer rotor spaced apart from each other in the circumferentially equidistant intervals, and is interposed between the transformer stator and the transformer rotor and the transformer stator so as to directly contact the conductors so as to transmit video signals. It is characterized by.

la. Important use of the invention.

The present invention is effective in realizing high quality by changing the direct transformer method from the cran transformer structure to transfer the original path away from the rotary transformer structure transmitted by the coil organic method in the head drum device of the image reproducing apparatus so far known to be.

Description

Rotary Transformer Assembly for Rotary Rotary Head Drum Unit

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rotary head drum assembly of a video reproducing apparatus such as a video cassette recorder (VCR). In particular, the present invention relates to a reproducing signal and a recording signal directly to a processing circuit block without loss. It relates to a rotary transformer assembly of a rotary head drum device in which the structure of the rotary transformer is changed to a direct transfer method.

The technology of circuit building blocks that currently handle image quality has continued to evolve to meet the requirements of achieving fairly good image quality.

1 is a cross-sectional view showing a configuration of a conventional rotary head drum device of VAL. Referring to the drawings, a head drum assembly (100) of a video reproducing apparatus typically includes a spindle motor (not shown) that provides a rotational driving force. a spindle 15 coupled to a spindle motor, a stationary drum 10 seated on the spindle motor, and a rotary drum 20 supported on the spindle motor by bearings. ), Rotary transformers (31, 32: rotary transformers), stator (40: stator), rotor (50: rotor) and the like.

As shown in FIG. 2, the disc-shaped transformer includes a transformer rotor 31, a transformer stator 32, and a coil 33 wound a plurality of times in channels 31a and 32a of the transformer. And the like.

The transformer rotor 31 is fixed to the underside of the flange of the rotary shaft, and the transformer stator 32 is placed on the lower stationary drum 10 so as to face each other with a slight distance from the transformer rotor 31. .

The transformer rotor 31 and the transformer stator 32 are positioned to face each other to constitute the rotary transformer assembly 30. In addition, the disk-shaped transformer rotor 31 and the transformer stator 32 are formed in a direction in which a plurality of channels 31a and 32a face each other at equal intervals in the circumferential direction from the central hole 34, and the bottom of the channel. The coil 33 is wound on the surface. Thus, for example, the coil group 33a of the transformer rotor 31 is positioned to face the coil group 33b of the transformer stator 32, and the coils 33a and 33b are positioned to face each other, thereby providing a retainer channel. A magnetic field is induced between the channel 31a and the pair of channels including the stainer channel 32a. Thus, this action causes a video signal (arrow direction) to be transmitted between the pair of channels 31a and 32a.

According to this configuration, if the VR is in the recording mode or the playback mode, the upper rotary drum 20 of the rotary head drum device is rotated by a motor, which is on the video tape. The magnetic head is placed on the circumferential surface of the head drum so as to play back the video signal recorded on the video tape or to record the video signal on the video tape.

Here, the signal transmission between the upper rotary drum 20 and the lower stationary drum 10 is a rotary transformer assembly (30) which causes a magnetic field by aligning the coils (33a, 33b) on the bottom surface of the channels (31a, 32a) Is performed by. When current flows in the coils 33a and 33b located in the channel, the channel is facing so that the amount of magnetic flux flowing along the cross section of the coil changes, resulting in electromotive force induced in the coil. Since the transformer rotor 31 and the transformer stator 32 are placed in close contact with each other, the electromotive force serves to apply electricity to the coils facing each other.

However, such a known head drum device has a problem in that even if a new material having excellent transmission characteristics is used, the components of the transmitted signal cannot be the same as the original signal, and a considerable loss occurs. The signal located next to it cannot be derived without any filtering, and such abandoned signal is processed in video circuit technology, but already contains a considerable amount of noise.

In order to solve the above problems, a problem of widening the spacing between transformers has been proposed, but this also has a great influence on the overall size of the head drum device, which is not a fundamental solution.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to directly transmit the original signal picked up from the head of the rotary head drum device for BC realizing high quality without signal loss To provide a transformer assembly.

In order to achieve the above objects, the most preferred embodiment according to the technical idea of the present invention, in the rotary transformer assembly of the head drum device for BC, the transformer rotor configured to alternate the insulator and the conductor at equal intervals in the circumferential direction; The transformer stator is placed facing each other with the transformer rotor spaced apart from each other in the circumferentially equidistant intervals, and is interposed between the transformer stator and the transformer rotor and the transformer stator which are interposed between the transformer rotor and the transformer stator to directly contact the conductors, thereby transmitting a video signal. It is characterized by.

1 is a cross-sectional view showing the configuration of a conventional rotary head drum device for BC in accordance with a conventional embodiment

Figure 2 is a cross-sectional view showing the configuration of the rotary transformer assembly of the rotary head drum device for BC in accordance with a conventional embodiment

Figure 3 is a cross-sectional view showing the configuration of the rotary transformer assembly of the rotary rotary drum device for BC in accordance with the most preferred embodiment of the present invention

Explanation of symbols on the main parts of the drawing

1,4 Insulator 2,5 Conductor

3, 6: Channel 7: Ball

31: Transformer rotor 32: Transformer stator

Hereinafter, with reference to the accompanying drawings will be described in detail the most preferred embodiment of the present invention. First, in describing each of the drawings, the same components have the same reference numerals as much as possible even though they are shown in different drawings. In describing the present invention, when it is determined that description of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

As shown in FIG. 3, when the components of the rotary transformer assembly 30 of the head drum device according to the embodiment of the present invention are roughly divided, the transformer rotor 31 and the transformer rotor 31 are installed to face each other. It consists of a transformer stator 32 and a ball 7 interposed between the transformers 31 and 32.

The transformer rotor 31 has a disk shape as in the prior art, and is composed of the insulator 1 and the conductor 2 alternately at equal intervals in the circumferential direction about the center hole. The insulator 1 is located at the outermost side of the transformer rotor, the conductor 2 is located adjacent to the center hole 34, and the insulator 1 is again located.

In addition, the transformer stator 32 is formed in a disk shape as in the related art, and the insulator 4 and the conductor 5 are alternately formed at equal intervals in the circumferential direction in the same manner as the transformer rotor 31. That is, the insulator 4 is located in the outermost part of the transformer stator, the conductor 5 is located adjacent to the center hole 34, and the insulator 4 is again located.

The transformer rotor 31 and the transformer stator 32 are installed to face each other while maintaining a minute spacing therebetween, and the balls 7 so that the video signal is directly contacted to the conductors 2 and 5 in the opposite direction. This intervenes. That is, channels 3 and 6 are formed in the transformer rotor and the transformer stator conductors 2 and 5 in which the balls 7 are interposed so that the balls are seated in surface contact with both channels. The channels 3 and 6 are formed facing in the opposite direction.

In detail, the video signal picked up from the magnetic head (not shown in the figure) is transmitted to the conductor 2 of the transformer rotor 31 and to the ball 7 in contact with the conductor 2, It is then transferred from the ball 7 to the conductor 5 of the transformer stator 32 and to the video processor. That is, the signal picked up by the head is transmitted directly to the video processor by the conductors 2 and 5 and the ball 7.

The direct transfer between the rotary transformer assemblies via the ball 7 is transmitted to the video processor in a direct contact method using the known ball bearing principle. At this time, the material of the ball is also the same as the material of the conductor.

As described above, the present invention is to change the direct transfer method from the cran transformer structure to transfer the original path to the coil structure of the head drum device of the conventionally known image reproducing device to the coil organic transfer method, Effective for achieving high picture quality. On the other hand, in the detailed description of the present invention has been described with respect to specific embodiments, it is obvious to those skilled in the art that various modifications are possible without departing from the scope of the present invention.

Claims (2)

In the rotary transformer assembly of the head drum device for V-C composed of a transformer positioned facing each other and a coil positioned in a channel formed in the opposite direction of the transformer, A transformer rotor 31 composed of alternating insulator 1 and conductor 2 at equal intervals in the circumferential direction; The transformer stator 32 and the transformer stator 32 and the transformer stator 32 are alternately placed to face each other while being spaced apart from the transformer rotor 31 so as to alternate between the insulator 4 and the conductor 5 at equal intervals in the circumferential direction. A rotary transformer assembly of a head drum device for a V-C, comprising a ball (7) interposed therebetween and directly contacting the conductors (2,5) to transmit a video signal. The rotary transformer according to claim 1, wherein channels (3, 6) are formed on the conductors (2, 5) so that the balls directly transmit video signals in directions facing each other. assembly.