KR19980059062A - Magnetic head of the head drum assembly - Google Patents

Abstract

The present invention relates to a magnetic head of a head drum assembly, and more particularly, to an improvement of a video head that reads or records a recording signal recorded on a tape moving along the periphery of the head drum assembly. A head base 20 having a plurality of support parts 22, 24, and 26 and a plurality of head chips 32, 34, 36 fixed to each head base 20 to perform different functions. And a magnetic recording head of V-Cal consisting of glass moldings 42, 44 and 46 which fix each head chip to a predetermined height on the supports 22, 24 and 26. Since it does not need to simplify the structure and reduce the manufacturing cost, in particular, since it is not necessary to adjust the step between the head after assembling, there is an effect that can improve the assembly as well as productivity.

Description

Magnetic head of head drum assembly

The present invention relates to a magnetic head of a head drum assembly, and more particularly to an improvement of a video head that reads or records a recording signal recorded on a tape moving along the periphery of the head drum assembly.

In general, V-Cal records signals to the main chassis, a traveling system installed in the main base to take out the tape from the cassette and moves along a predetermined path, and records a signal on a moving tape that is disposed at an appropriate place of the traveling system. It is equipped with a head drum assembly for reproducing a signal from. Since the head drum assembly includes a video head which directly records and reproduces signals, it must maintain a very high level of reliability and stability, and a good durability against vibration or noise.

The traveling system is also provided with an audio / control head for reading out a voice signal from a tape or recording a voice signal.

Looking at the configuration of a conventional head drum assembly with reference to Figure 1 as follows. According to this, the head drum assembly is fixed to the main base (not shown) and has a lower drum 1 having a shaft hole 1 a therein, and a bearing 2 rotatably in the shaft hole 1 a of the lower drum 1. A supported main shaft 3, an upper drum 4 fixed to an upper end of the main shaft 3 and rotating with respect to the lower drum 1 together with the main shaft 3, and the main shaft 3 and the upper drum. It consists of a drive motor (5) for inducing a rotational motion (4). At least two head bases 6 are fixed to the bottom of the upper drum 4 at predetermined intervals by fixing screws. Each head base 6 also has a video head 6a for magnetically recording or reproducing a video signal at its radially outer end. In addition, since the rotary transformer 8 is installed between the upper drum 4 and the lower drum 1 so as to transmit a signal in a contactless manner, an image signal supplied to or output from the video head is generated. You can give and receive without. On the other hand, the drive motor 5 is composed of a stator 5a attached to the lower drum 1 and a rotor 5b fixed to the main shaft 3 and rotating in rotation with respect to the stator 5a. ) Rotates at high speed with the main shaft 3 and the upper drum 4 as the current is supplied to the stator 5a so that the video head 6a in turn passes the signal track to the tape being transported along the periphery of the head drum assembly. Scan it.

Such a headdrum assembly includes a videohead that records video signals or reads recorded signals on a tape moving along the periphery of the headdrum assembly as described above.

The video head 6a is bonded and fixed on the head base 6 by winding a coil several times or more and soldering it on the head PC ratio 6b as shown in FIG.

However, the video head of the head drum assembly, as well as the post-adjustment of the height of the work must be performed separately, thereby having a problem that only a limited head can be installed in one head base.

That is, as described above, the video head 6a fixed on the head base is fixed by bonding, so that the height is adjusted by using a separate head spacer during initial assembly. This configuration also provides a separate adjustment screw (7), etc. to perform post-adjustment to correct assembly errors after assembly, so that it is difficult to adjust the height of the video head. The head base has a difficulty in installing only a limited number of heads.

Therefore, the present invention has been made to solve the problems of the prior art as described above, the purpose of which does not require a separate audio playback head, of course, does not require a step adjustment between the separate head after assembly The present invention provides a magnetic head capable of reducing the manufacturing cost and improving productivity by providing a head.

Figure 1 is a longitudinal cross-sectional view showing the configuration of a conventional head drum assembly

Figure 2 is a bottom view showing the configuration of a conventional magnetic head

Figure 3 is a bottom view showing the configuration of a magnetic head according to the present invention

Figure 4 is a front view showing the configuration of the magnetic head according to the present invention

* Explanation of symbols for the main parts of the drawings

4: upper drum 20: head base

22, 24, 26: support 32: head for standard mode (SP)

34: Head for long time mode (EP) 36: Head for audio FM

42, 44, 46: glass molding

An object of the present invention is a head base having a plurality of support parts on one side, a plurality of head chips fixed to each head base to perform different functions, and glass molding for fixing each head chip to a predetermined height on the support portion It can be achieved by the magnetic recording head of VCC made.

Hereinafter, a preferred embodiment of a magnetic head according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a plan view showing the configuration of a magnetic head according to the present invention, Figure 4 is a front view showing the configuration of a magnetic head according to the present invention. According to the present invention, a plurality of support portions 22, 24, 26 are formed on one side of the head base 20 fixed to the upper drum 4, and each support portion 22, 24, 26 is formed. A plurality of head chips 32, 34, 36 which perform different functions is fixed to the wall.

According to the present invention, each of the head chips is fixed to the predetermined height by the glass moldings 42, 44, 46 on the head base 20 as shown in FIG.

For example, the head base is fixed to a standard play SP head 32, an extended play EP head 34 as well as an audio FM head 36 to have a predetermined height. can do.

In addition, the coil wound on each head chip is soldered to the head PC ratio provided to the head base.

The present invention having such a configuration can record and reproduce video and audio signals by fixing a plurality of head chips 32, 34 and 36 that perform different functions on one head base 20. As a result, the head chip 32, 34 and 36 maintains a predetermined position by the glass molding 42, 44 and 46 as well as the conventional audio head. Since the step difference adjustment between the head chips 32, 34 and 36 is not required after assembly, sufficient precision of adjustment can be ensured only by the pre-adjustment operation.

As described above, the video head of the head drum assembly according to the present invention provides a plurality of head chips to perform a different function on the head base of the honeysuckle, each head chip by glass molding to a corresponding reference height Since it does not require a separate audio head to be maintained, it is possible to simplify the structure and reduce the manufacturing cost, and in particular, since it is not necessary to adjust the step between the heads after assembling, it has the effect of improving the assembly and productivity.

Claims (2)

A head base 20 having a plurality of support parts 22, 24, 26 on one side and a plurality of head chips 32, 34, 36 fixed to each head base 20 to perform different functions. And glass-molding (42) (44) (46) for fixing each head chip to a predetermined height on the supports (22), (24) and (26). 2. The VR chip according to claim 1, wherein the plurality of head chips are a head for the standard mode (SP), a head for the long time mode (EP), and a head for the audio FM (36). Magnetic recording head.