KR19990008777U - Base integrated head device of magnetic recording player - Google Patents

Abstract

The present invention relates to an improvement in the mounting structure of a head for recording or reproducing information on a magnetic tape while rotating together with an upper drum which is a rotating body in a magnetic recording player.

The head mounting structure of the present invention is a structure in which two or more video heads and an audio head are integrally formed in an upper drum, and a head integrated structure is formed. At this time, the video head and the audio head are processed to have a step on each other. The base integrated head has a structure that is fastened to the upper drum by one or two fastening screws.

According to the present invention, the head fixed to the upper drum and the amount of protrusion of the head to the upper drum, the step amount, the installation angle, etc. are made through one fastening and adjusting process without the need for fastening and adjusting the individual heads by the base integrated head configuration. Because of the adjustment, the head drum assembly process can be simplified and the manufacturing cost can be reduced.

Description

Base integrated head device of magnetic recording player

1 is a partial longitudinal cross-sectional view of a head drum assembly of a conventional magnetic recording and reproducing apparatus,

Figure 2 is a longitudinal cross-sectional view showing the upper, lower drum assembly of the prior assembly of the head drum assembly.

3 is a bottom view of a conventional upper drum showing a coupled state of the head.

Figure 4 is a plan view of one embodiment base integrated head of the present invention.

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 is a bottom view of the upper drum coupled to the base integral head of the present invention.

Figure 7 is a longitudinal cross-sectional view of the assembled upper, lower drum assembly of the subject head drum assembly.

Figure 8 is a partial longitudinal cross-sectional view of the head drum assembly of the present invention.

(A) and (b) of FIG. 9 is a plan view showing another embodiment of the base-integrated head of the present invention.

Explanation of symbols on the main parts of the drawings

1: upper drum 2: rotation axis

3: lower drum 4: motor

20: base integrated head 21: head base

22a: video head 22b: audio head

23: head fastening screw

The present invention relates to an improvement in the head mounting structure of the magnetic recording and reproducing apparatus, and more particularly, the base-integrated head made of a plurality of heads on the head base is formed integrally with different steps according to the head type. The present invention relates to a base integrated head device of a magnetic recording and reproducing apparatus which simplifies the head tightening process and facilitates head adjustment by fixing.

In general, a head drum device for recording a signal on a magnetic tape or reproducing a signal recorded on a magnetic tape in a magnetic recording player is largely fixed to one side of an upper drum, a lower drum, and a bottom of an upper drum, and rotates with a upper drum. It consists of a rotating head for transmitting a signal to the tape or a signal and a motor unit for rotating the upper drum.

Looking at the general structure of such a conventional head drum assembly through FIGS. 1 to 3 as follows.

First, FIG. 1 is a partial longitudinal cross-sectional view of a head drum assembly of a conventional magnetic recording and reproducing apparatus. FIG. 2 is a longitudinal cross-sectional view of an upper and lower drum assembly in a pre-assembly state, and FIG. 3 is an upper drum showing a coupling state of a head. Bottom view on.

As shown, a conventional head drum assembly includes an upper drum 1, a lower drum 3 installed around a rotating shaft 2 extending downward from the center of the upper drum 1, and a lower drum 3 The motor unit 4 which is installed at the lower part of the upper part and transmits the driving force to the upper drum 1 and the head 5a and 5b which is fixed to the bottom surface of the upper drum and transmits a signal with a magnetic tape or receives a signal from the magnetic tape Is composed of,

At this time, the upper and lower drums 1, 3 and the motor portion 4 in the center of the rotating shaft (2) penetrates into the resin while the upper drum (1) is pressed around the upper portion of the rotating shaft (2) It is extrapolated in the state, and the lower drum 3 is installed in the state below with the bearing 6 interposed.

In addition, a motor unit 4 including a fixed motor 4a and a rotation motor 4b is mounted around the rotation shaft 2 extending downward from the lower drum 3, wherein the rotation motor ( 4b), the housing of the rotary motor 4b is fixed to a ring collar 7 fixed around the rotary shaft 2 so that the rotary motor 4b, the rotary shaft 2 and the upper drum 1 form a body. Will rotate.

Meanwhile, the video head 5a and the audio head 5b positioned at the bottom of the upper drum 1 are fixed to the upper drum 1 by the head fixing screw 8 so as to rotate together with the upper drum 1. A rotating transformer 9 is attached to the inner bottom of the upper drum 1, and a fixed transformer 10 is attached to the lower drum 3 immediately below the rotating transformer 9.

Looking at the fixing structure between the heads 5a and 5b and the upper drum 1 in more detail based on FIG. 2 and FIG. 3, the two video heads 5a and the audio head 5b are respectively fixed to the head. By fastening the screw 8 to the bottom of the upper drum 1, the head of the same type is maintained at an angle of 180 ° while the height of the head and the angle of projection of the head are adjusted using the height adjusting screw 11. Adjust the position, etc.

A head shim 12 is interposed between the video head 5a and the upper drum 1 in order to match the level difference between the video head 5a and the audio head 5b.

In the drawings, reference numeral 13 denotes a coin washer, 14 a screw for rotating a motor, and 15 a ring collar screw.

Looking at the operation of the head drum assembly of such a structure, the rotation motor generated by the interaction between the fixed motor (4a) and the rotary motor (4b) by applying a current to the motor unit 4 installed on the lower side of the lower drum ( The rotational force of 4b) is transmitted to the rotating shaft 2 via the ring collar 7 fastened by the screw 14 for rotating the motor to rotate the upper drum 1 fixed to the upper portion of the rotating shaft 2. Accordingly, the rotation of the heads 5a and 5b fixed on the upper drum 1 is achieved.

Looking at the flow of the signal in such an operation state, first, when the signal is to be recorded on the magnetic tape, the signal is applied to the head (5a) (5b) through the rotation transformer (9) from the fixed transformer (10). At this time, the heads 5a and 5b rotate to record signals on the magnetic tape. On the other hand, when the signal recorded on the magnetic tape is reproduced, the signal flow is transmitted in the reverse order of the signal proxy to reproduce the signal recorded on the tape.

By the way, the video head 5a and the audio head 5b of the magnetic recorder must have a certain step according to the VHS standard. For this purpose, the video head 5a is conventionally used under the video head 5a (when referring to the drawing of FIG. 2). Since the head shim 12 is positioned first and then the video head 5a is fastened, the head shim 18 is required as a separate part for aligning such a step. There is a problem in that a separate assembly process for positioning (12) is required, resulting in an increase in parts and complexity of the assembly process.

In addition, the conventional head mounting structure requires fastening screws as much as the head base portion, as the fastening screws need to be fastened to respective heads, and accordingly, the fastening process of the fastening screws has to be performed. .

In addition, in the conventional head mounting structure, each head requires a process of adjusting the angle, step, and protrusion amount of each head after the fastening of the fastening screw in the assembling process for correct scanning of the magnetic tape. There is a problem.

Accordingly, the present invention is to solve the above-mentioned problems exhibited by the head mounting structure of the conventional magnetic recording and reproducing apparatus. It is an object of the present invention to provide a base integrated head device of a magnetic recording / reproducing device which can simplify the head fastening process and facilitate head adjustment by fixing to the bottom surface.

The above object of the present invention is achieved by providing a base-integrated head in which the head mounting portion of the head base made of a single body is processed in two stages so that each head is integrally formed on the stepped head mounting portion.

At this time, the base integral head is assembled to the upper drum by two or less fastening screws, and the adjustment work for the head is completed by one adjustment without requiring individual adjustment for each head. This piece is followed.

Matters relating to the above object and technical configuration of the present invention and the resulting effects thereof will be clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

First, FIG. 3 is a plan view of one embodiment of the base integrated head of the present invention, and is a cross-sectional view taken along line A-A of FIG.

As shown, the base integrated head 20 according to the present invention has a structure in which the head chip is integrally formed on the outer end of the end surface by machining the upper surface on the plate-shaped head base 21 in two stages. Getting drunk.

That is, the surface of the head base 21 on which the two video heads 22a are to be formed is processed to have a slightly lower height than the surface of the head base 22b on which the audio head 22b is to be formed. Steps are to be given between the video head 22a and the audio head 22b formed thereon.

In addition, the screw fastening holes 21a are formed at two places on the head base 21, which is configured to fix the base integrated head 20 to the upper drum 1, and thus to the upper drum 1. The fixing structure will be described with reference to FIGS. 6 and 7 as follows.

6 is a bottom view of the upper drum to which the base integrated head of the present invention is coupled, and FIG. 7 is a longitudinal sectional view of the upper and lower drum assemblies of the head drum assembly of the present invention before assembly. The same reference numerals as in FIG.

As shown, the head fastening screw (21a) into the screw fastening hole 21a in a state where the base integral head 20 formed integrally with the video head 22a and the audio head 22b is located at the bottom of the upper drum 1. 23) by fastening the head height adjustment screw (11) four heads are coupled to the upper drum (1) at once.

Looking at the assembly process of the head drum assembly provided with the base integrated head 20 of the present invention as follows.

First, the rotary shaft 2 is pressed into the upper drum 1, and then, as shown in FIG. 4, the base integral head 20 to which the video head 22a and the audio head 22b are attached is fastened as shown in FIG. The screw 23 is coupled to the upper drum 1 and the head height adjusting screw 11 is fastened. At this time, since the step is already formed on the head base 21, a separate head shim does not need to be interposed between the upper drum 1 and the video head 22a to fit the step.

Next, as shown in FIG. 7, the upper drum assembly and the lower drum assembly are assembled, respectively. The assembly of the upper drum assembly is performed by rotating the transformer 9 at the lower end of the upper drum 1 to which the base integrated head 20 is coupled. ) Is completed by soldering the coils drawn from the rotary transformer 9 to the heads 22a and 22b.

Then, the assembly of the lower drum assembly consists of a process of adhering the fixed transformer 10 to the lower drum 3 and pressing the bearing 6 in the upper and lower portions of the center through hole.

As such, after the assembly of the upper and lower drum assemblies is completed, the conical washer 13 is inserted into the rotating shaft 2 below the lower drum assembly while the rotating shaft 2 of the upper drum assembly is inserted into the bearing 6 of the lower drum assembly. ), And the ring collar 7 is fastened in the state in which the ring collar 7 is extrapolated around the rotary shaft 2 of the lower part thereof to fix the ring collar 7.

Then, the assembly of the head drum assembly is completed as shown in FIG. 8 by fastening the fixed motor 4a to the lower drum 3 and fastening the rotating motor 4b with the ring collar 7 and the motor fastening screw 14. do.

On the other hand, Figure 9 shows another embodiment structure for the base integrated head of the present invention, (A) the base integrated head 20 through the form of one fastening point, that is, only one head fastening screw (23b) Is a structure fixed to the upper drum (1), (b) shows a base-integrated head when applied to the deluxe model of the number of heads 6 or more, 22a 'is a general video head, 22b' is a hi-fi head , 22c 'is a video dedicated head.

As described above, the base-integrated head 20 of the present invention is the head between the head and the upper drum to give a step when combined with the upper drum 1 as the head is already bonded on the head base machined step Since there is no need to sandwich the shim, the assembly process can be simplified and the material cost can be reduced.

In addition, according to the present invention, since the base-integrated head 20 is fixed to the upper drum 1 by two or less head fastening screws 23, the head fastening screw 23 is used when adjusting the head. In the unfolded state, the head base 21 can be adjusted to the desired specification with respect to the entire head by pushing the front, rear, left, and right in one step. Therefore, the adjustment work can be performed much more easily than in the conventional method. There is an advantage to this.

Claims (3)

A head drum device of a magnetic recording and reproducing apparatus, wherein the base-integrating head (20) of the magnetic recording and reproducing apparatus is characterized in that an upper drum is provided with a base integrated head (20) having two or more heads. 2. The base integrated head device of the magnetic recording and reproducing apparatus according to claim 1, wherein the video head (22a) and the audio head (22b) are formed on the base integrated head (20) with steps. 2. The base integrated head device of the magnetic recording and reproducing apparatus according to claim 1, wherein the base integrated head (20) is coupled to the upper drum (1) through two or less fastening points.