KR0154678B1 - Head of magnetic recording and reproducing apparatus and the manufacturing method - Google Patents

Abstract

The present invention relates to a head of a magnetic recording and reproducing apparatus and a method of manufacturing the same, and more particularly, to a head capable of reading signals from two signal tracks having different azimuth angles using a single head, and a method of manufacturing the same. In constructing a head that stands over a signal of a magnetic tape formed by alternating an R track having an input value of + θ ° and an L track having an input value of -θ °, respectively, based on the center line S of the head 10, respectively. A pair of gaps inclined by θ ° to the left and right and intersecting with each other in an X shape, the first to fourth core members C1, C2, C3, and C4 divided by the X shape gaps, and + It is characterized by consisting of the first to fourth coils including two core members on both sides with respect to the gap 12 of θ ° and the + θ ° gap 14.

Description

Head of magnetic recording and reproducing apparatus and manufacturing method thereof

1a to 1j is a view showing a conventional head manufacturing process.

2 is a perspective view showing the configuration of a head according to the present invention.

3a to 3h are views showing the manufacturing process of the head according to the present invention.

4 is a view showing a state in which the head according to the invention mounted on the head drum.

* Explanation of symbols for main parts of the drawings

10: head 12,14: gap

21: first coil 22: second coil

23: third coil 24: fourth coil

30: core material 32: winding groove

38: head base 40: head drum

42: head assembly C1: first core member

C2: second core member C3: third core member

C4: fourth core member

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head of a magnetic recording and reproducing apparatus and a method of manufacturing the same, and more particularly, to a head capable of reading signals from two signal tracks having different input values using one head and a method of manufacturing the same.

Typically, VR is a device for recording or reproducing video and audio signals on a magnetic tape, as is well known. Such a device typically includes an image in a head integrated with the head drum by transferring magnetic tape onto a rotating head drum. The signal will be recorded or played back. The heads are each provided with a pair of heads at intervals of 180 ° on the head drum. In addition, an R track and an L track are alternately input to the magnetic tape, and one of the heads repeatedly scans the R track on the magnetic tape and the other one scans the L track.

On the other hand, the image signal recorded on the magnetic tape is inclined to form a signal track in order to increase the signal receiving capacity, wherein the head drum is installed to have a predetermined inclination angle relative to the vertical axis, the magnetic tape on the head drum peripheral It is transported horizontally in contact with about 180 °. In addition, the rotational speed of the head drum is rotated much faster than the feeding speed of the magnetic tape, and the head is configured to helical scan by contacting an image signal track formed in an inclined state on the magnetic tape. The magnetic tape forms a guard band between each video signal track and adjacent signal tracks to separate adjacent signal tracks to cross talk, that is, the head is divided into two signal tracks. By contacting at the same time to pick up two signals at the same time to prevent the phenomenon of damage to the image quality.

On the other hand, recently, in order to increase the recording density of image data per unit length in the magnetic tape, the guard band is eliminated and the signal tracks are continuously formed, but the signal recording angles inputted to the adjacent signal tracks, i.e., the R track and the L track, are measured. A different configuration has been developed in which a tilt angle corresponding to a recording angle of the corresponding signal track (commonly referred to as an azimuth angle, having a range of 6 ° to 30 °) on the head is developed. Thus, the head reads the signal only from the corresponding track, preventing crosstalk. Therefore, in order to increase the recording density and prevent crosstalk as described above, the head needs to give the inclination angle corresponding to the azimuth angle, and the inclination angle requires a high degree.

FIG. 1 shows a conventional manufacturing process of a head, which includes a core material 1 having a predetermined length as shown in FIG. 1a and having a central winding groove 2 formed in a longitudinal direction thereof. A step of grinding the end portion of the tile to a predetermined angle (corresponding to the azimuth angle) is carried out, and a step of tapering the side polishing and the upper portion of the polished surface is performed as shown in FIG. 1C. Then, after polishing the bottom surface as shown in Fig. 1d, the outer winding groove 5 is formed as shown in Fig. 1e. Subsequently, when the core material 1 in the longitudinal direction is cut at a predetermined angle (corresponding to an azimuth angle) as in FIG. 1f, one head 3 unit as shown in FIG. 1g is completed. In this state, the head 3 is fixed to the left and right sides of the tip of the head base 4 as shown in FIG. 1h. At this time, the left and right heads are installed to have the same inclination angle. In the above state, the coil 6 is wound through the center winding groove 2 and the outer winding groove 5 as shown in FIG. 1i. Finally, the front end of the head 3 is curved to process the magnetic tape. The manufacturing of the head is completed by performing a process of reducing friction.

However, such a conventional head manufacturing method has to manufacture two types of heads having different inclination angles according to the corresponding signal tracks, and in particular, two phases when the pair of heads 3 are mounted on the head base. It required a high degree of work that must be exactly matched, and therefore had a problem of poor workability.

The present invention has been made in view of the above problems, and an object thereof is to provide a head of a magnetic recording and reproducing apparatus capable of reading R tracks and L tracks having different signal input values as one head, and a method of manufacturing the same. have.

An object of the present invention is to configure a head for scanning a signal of a magnetic tape formed by alternating an R track having an input value of + θ ° and an L track having an input value of -θ °, respectively, based on the centerline of the head. A pair of gaps inclined by θ ° to the left and right and intersecting with each other in an X-shape, first to fourth core members C1, C2, C3, and C4 divided by the X-shaped gap, and having + θ ° It can be achieved by configuring the first to fourth coils, each of which includes two core members on both sides of the gap and a gap having + θ ° and is wound. In other words, when winding two pairs of coils forming different inclination angles on one head, only one pair of coils having inclination angles corresponding to the corresponding tracks on the magnetic tape scans the signal.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

2 shows a configuration of a preferred embodiment of the head of the magnetic recording and reproducing apparatus according to the present invention. According to the present invention, the signal angles input to the R track and the L track of the magnetic tape are + θ ° and -θ, respectively. A pair of gaps 12 and 14 are inclined by θ ° to the left and right sides with respect to the center line S of the head 10, and cross each other in an X-shape when referred to as °. The gaps 12 and 14 are made again by using the non-conductive adhesive to the first to fourth core members C1, C2, C3 and C4 cut in an X shape in the longitudinal direction of the head 10. It is formed by gluing. In addition, on the head 10, the first coil 21, the second core member C2, and the fourth coil 21 surrounding the first core member C1 and the third core member C3 together to form −θ °. The second coil 22 surrounding the core member C4 together is installed, and the third coil 23 and the third coil 23 surrounding the first core member C1 and the fourth core member C4 together to form + θ °. A fourth coil 24 surrounding the two core members C2 and the third core member C3 is installed.

The coils are wound at predetermined intervals from each other, and pass through at least one of the X-shaped gaps 12 and 14.

On the other hand, Figure 3 is a view showing a manufacturing process of the head, according to this, one side of the core material 30 as shown in Figure 3a, as shown in Figure 3b, one side of the upper part is cut at an inclination of + θ ° and the lower portion A process of cutting to -θ ° slope is performed. As shown in FIG. 3C, winding grooves 32 are formed in the inclined surfaces, respectively, to complete the first core member C1. Subsequently, as shown in FIG. 3D, the second core member C2 having the same shape as that of the first core member C1 but having a different phase of the winding groove 32 is applied to each of the inclined surfaces in a state where the inclined portions face each other. The third core is coated with a non-conductor 34 having a space formed by the inclined portion is made of the same material as the first core member (C1) and the second core member (C2) and is formed in an approximately isosceles triangle shape. The core rod is completed by inserting and bonding the member C3 and the fourth core member C4.

In this state, as shown in FIG. 3e, the core rod is cut to a predetermined length so that two winding grooves 32 formed in the first core member C1 and the second core member C2 are included. One head piece 36 is completed. Subsequently, the head unit 36 is mounted on the head base 38 as shown in FIG. 3f, and the coil is wound through the respective winding grooves 32 as shown in FIG. 3g. In this case, the coil may include the first coil 21 and the second core member C2 and the fourth core member C4 surrounding the first core member C1 and the third core member C3 forming -θ °. The second coil wrapped together is wound, and the third coil, the second core member C2 and the third core member which surround the first core member C1 and the fourth core member C4 together to form + θ °. The fourth coil wrapping C3) together is wound. Then, as shown in FIG. 3h, the head assembly 40 is completed by performing a curved machining process for reducing contact friction between the tip of the head and the tape. When the head assembly 40 is mounted to the head drum 42, the head assembly 40 is installed at any one side selected from the periphery as shown in FIG. 4, and the head assembly 40 is the same as the head assembly 40 at a 180 ° interval. The balance 44 having a weight is installed to prevent shaking due to the center of gravity of the head drum 42 when it is rotated.

Looking at the operation of the present invention having such a configuration as follows. For convenience, the signal input angle of the R track is + θ ° and the signal input angle of the L track is -θ °.

First, when the head passes through the R track with an input of + θ °, the + θ ° formed by the third coil 23 and the fourth coil 24 on the head to correspond to the signal input value of the R track. Gap 12 will scan the signal. Subsequently, when the head 10 enters the next track, that is, the L track having the −θ ° input, the first coil 21 and the second coil 22 on the head correspond to the signal input value of the L track. A gap of-[theta] [deg.] Formed is to scan the signal. The gaps of + θ ° and −θ ° are such that signals that do not coincide with the angle of formation are not scanned (also referred to as 'Azimuth loss'), so that signals can only be scanned on the corresponding track.

According to the present invention, it can be seen that one track is scanned during one rotation of the head 10. Therefore, the track of the magnetic tape should be set to a 360 ° phase angle from the start of the R track to the start of the L track. This is so far compared to the conventional method in which two head assemblies are installed at the periphery of the head drum 42 at two degrees, and the phase angle of one track and the adjacent track is set to 180 °. The scan will be performed with the camera wound at least 270 °. That is, the conventional magnetic tape is scanned by fitting approximately 180 ° to the head drum in order to provide a phase difference of 180 °. However, in the present invention, since one track phase angle becomes 270 ° or more, the winding time of the magnetic tape is increased. will be. This should make the inclination angle of the track of the magnetic tape larger.

As described above, the head of the magnetic recording and reproducing apparatus according to the present invention and the method of manufacturing the same are suitable for mounting only one head drum assembly on the head drum since the R track and the L track can scan signals in one head. By completing the assembly of the head drum can improve the assembly precision of the head, as well as has the effect of eliminating the hassle of having to manufacture each head having two angles when manufacturing the head.

Claims (6)

In constructing a head for scanning a signal of a magnetic tape formed by alternating an R track having an input value of + θ ° and an L track having an input value of −θ °, respectively, based on the center line S of the head 10, respectively. The first to fourth core members C1, C2, which are divided by a pair of gaps 12 and 14 which are inclined by θ ° to the left and right and cross each other in an X-shape and the X-shaped gaps 12 and 14, respectively. C3, C4, and the first to fourth coils, each of which comprises two core members on both sides of the gap 12 and + θ ° gap 14, and is wound around Head of the recording / playback apparatus. The coil of claim 1, wherein the coil comprises: a first coil 21 and a second coil 22 winding two first to fourth core members on both sides with respect to the gap 14 of −θ °; The magnetic recording and reproducing apparatus, comprising: a third coil 23 and a fourth coil 24 winding two first to fourth core members on both sides with respect to the gap 12 of + θ °. head. The method according to claim 1, wherein the X-shaped gaps 12 and 14 provide adhesion to the first to fourth core members C1, C2, C3, and C4 cut in an X-shape in the longitudinal direction of the head 10. A head of a magnetic recording and reproducing apparatus, which is formed by re-bonding the cutout portion using a non-conducting having. The method of claim 1, wherein each of the coils (21, 22, 23, 24) is wound at a predetermined distance from each other, characterized in that passes through at least one of the X-shaped gap (12, 14). A head of a magnetic recording and reproducing apparatus. A step of cutting the upper portion of one side of the core material 30 with an inclination of + θ and cutting the lower portion with an inclination of -θ °, and forming the winding grooves 32 on the inclined cutting surfaces, respectively, to complete the first core member C1. And a second core member C2 having the same shape as that of the first core member C1 and configured to have a different phase of the winding groove 32 so that the inclined portions face each other to have an adhesive force on the respective inclined surfaces. The third core member C3 and the fourth core member are formed of the same material as the first core member C1 and the second core member C2, and are formed in the shape of an isosceles triangle. Inserting and attaching (C4) in the form of embedding the inclined portion to complete the core rod, and each of the two winding grooves 32 formed in the first core member (C1) and the second core member (C2) Cutting the core rod to a certain length to complete one head unit 36 , The step of mounting the head unit 36 on the head base 38, the process of winding the coil through the respective winding groove 32, and the front end of the head to reduce the contact friction between the head and the tape A head manufacturing method of a magnetic recording and reproducing apparatus, characterized in that to manufacture a head assembly (40) by sequentially performing a processing process. 6. The coil of claim 5, wherein the coil comprises a first coil 21, a second core member C2, and a first coil 21 surrounding the first core member C1 and the third core member C3 together. The second coil wrapping the four core members C4 together is wound, and the third coil and the second core members C2 wrapping the first core member C1 and the fourth core member C4 together to form + θ °. ) And a fourth coil winding the third core member (C3) together is wound.