JPH0668811B2 - Magnetic head - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a magnetic head, and more specifically, it records and reproduces information by slidingly contacting a magnetic tape, and regulates the running position of the magnetic tape on both sides of the sliding surface of the magnetic tape. The present invention relates to a magnetic head having a fixed tape guide.

[Prior Art] FIG. 1 is a perspective view and FIG. 2 is a top view showing a very general structural example of a conventional magnetic head of this kind for recording / reproducing of a cassette tape recorder.

Reference numeral 1 on both sides is a main body of the magnetic head, which is attached to the recorder via an attachment plate (not shown). The upper surface of the main body 1 is curved in an arc shape and forms a magnetic tape sliding contact surface (hereinafter abbreviated as sliding contact surface) 1a, which is in sliding contact with the magnetic tape 3 of the magnetic recording medium. The magnetic core 2 is fixed so that the front end surface having the magnetic gap G faces.

Then, tape guides 4 and 5 are fixed to both outer side surfaces of the main body 1 adjacent to the sliding contact surface 1a in the running directions of the magnetic tapes indicated by arrows F and R, with their upper portions facing the sliding contact surface 1a.

The tape guides 4 and 5 are formed in a substantially rectangular plate shape having two arms 4a and 5a at both ends of the upper edge, and the width between them is slightly larger than that of the magnetic tape 3. 4a, 5a
The traveling position of the magnetic tape 3 is regulated via the.

Based on this structure, the magnetic tape 3 as shown in FIG.
Is reproduced by sliding on the sliding contact surface 1a in the F direction or the R direction, and the running position of the magnetic tape 3 is regulated by the tape guides 4 and 5 at this time.

However, due to variations in the tape drive running system, the magnetic tape 3
The traveling position of may shift depending on the traveling directions F and R,
In this case, in the configuration in which the magnetic tape 3 is guided by the two tape guides 4 and 5 as described above, it is not possible to make a regulation that satisfies both traveling directions, so that the magnetic tape 3 is strongly attached to the tape guides 4 and 5. There is a problem in that the contact and deformation may occur, or the relative angle between the tape and the magnetic gap G may deviate and the recording and reproducing efficiency may decrease.

[Objective] The present invention has been made in view of the above circumstances, and in the magnetic head of the above-mentioned type, recording and reproduction can be performed by optimally restricting the traveling position of the magnetic tape in both traveling directions. The purpose is to provide a magnetic head.

[Constitution of the Invention] In order to achieve the above object, in the present invention, a tape for slidingly contacting a magnetic tape to record and reproduce information, and to regulate the running position of the magnetic tape on both sides of the sliding surface of the magnetic tape. In the magnetic head to which the guide is fixed, each of the tape guides has a travel restricting portion having a gap having a width substantially the same as the width of the tape, and a gap having a width larger than the width of the gap of the travel restricting portion. The travel non-restricting portion is provided at different positions in the substantially vertical direction of the magnetic tape sliding contact surface, and the travel restricting portion of one tape guide in the substantially vertical direction of the magnetic tape sliding contact surface. When,
A configuration is adopted in which the other tape guide is aligned with the traveling non-restricted portion.

[Embodiment] Hereinafter, details of an embodiment of the present invention will be described with reference to FIG. Here, the recording / reproducing head of the cassette recorder similar to the above-mentioned conventional example is used as an example, and the same or corresponding parts in FIGS. 1 and 2 are designated by the same reference numerals in FIGS. The detailed description of the same parts is omitted.

FIG. 3 and FIG. 4 are perspective views showing the structure of the magnetic head according to this embodiment and the positional relationship between the head and the magnetic tape which differs depending on the sliding running direction of the magnetic tape.

As shown in both figures, the structure of the magnetic head of this embodiment on the main body 1 side is the same as that of the conventional example, and the structure of the tape guides 4 and 5 is different from that of the conventional example.

One tape guide 4 has two arms 4a at both ends of the upper edge.
It is formed in a substantially rectangular plate shape having. And arm 4
The opposite inner sides of the tips 4b, 4b of the a, 4a are cut out in an L shape, and the end n between the tips 4b, 4b is larger than the width m between the lower portions 4c, 4c. The width m is slightly larger than the tape width 1 and has a size suitable for restricting the tape running position, and the width n has a size necessary for not restricting the running position.

The other tape guide 5 is also formed in a substantially rectangular plate shape having two arms 5a at both ends of the upper edge, but in this case, the tape guide 4 is opposite to the lower part 5c of the arms 5a, 5a. The opposite inner sides of 5c are notched in an L shape, and the width between them is the above-mentioned width n. The width between the tip portions 5b, 5b is the above-mentioned width m.

That is, the tape guide 4 has a lower portion 4c, 4c that regulates the magnetic tape, and the tape guide 5 has the same action with the tip portions 5b, 5b. The sliding contact surface immediately below the portion that acts on the magnetic tape. The height from 1a is different between the tape guides 4 and 5.

Based on the above structure, at the time of recording and reproducing, as shown in FIG. 5, the magnetic head has the tip portion fitted into the side of the magnetic tape 3 of the cassette 6 mounted on the recorder facing the outside. Then, by rotating the capstans 6 and 6'and the pinch rollers 7 and 7 ', recording and reproduction are carried out by sliding contact with the magnetic tape 3 fed in the arrow F or R direction.

At this time, when the tape running direction is the F direction, the magnetic head is displaced in advance in the direction of arrow A in FIG. 5 by a predetermined distance by means not shown, whereby the positional relationship between the magnetic head and the magnetic tape 3 is changed. The result is shown in FIG.

In this case, as shown in FIG. 3, the height from the sliding contact surface 1a of the magnetic tape 3 in the tape guides 4 and 5 increases, and the magnetic tape 3 is in the region between the upper portions 4b and 4b and between the upper portions 5b and 5b. Since it travels on the tape, it is not regulated by the tape guide 4 but regulated by the tape guide 5.

When the tape running direction is the R direction, the magnetic head is predisplaced in the B direction in FIG. 5 by a predetermined distance, whereby the positional relationship between the magnetic head and the magnetic tape 3 is as shown in FIG. Become.

In this case, as shown in FIG. 4, the height of the magnetic tape 3 at the tape guides 4 and 5 from the sliding contact surface 1a becomes low, and the magnetic tape 3 is in the region between the lower portions 4c and 4c and between the lower portions 5c and 5c. The tape guide 4 restricts the tape guide 4 and the tape guide 5 does not restrict it.

As described above, according to this embodiment, the running position of the magnetic tape is restricted by one of the tape guides 4 and 5 according to the difference between the running directions F and R.

Therefore, each of the tape guides 4 and 5 can be attached to the optimum position in accordance with the tape traveling direction which is responsible for the regulation, whereby the magnetic tape can be regulated to the optimum traveling position value in any traveling direction.

In the above configuration, the tape running direction may be the R direction in the state of FIG. 3, and the tape running direction may be the F direction in the state of FIG. Also, the tape guides 4 and 5 may be replaced.

Further, the tape guides 4 and 5 are not limited to one each, but a plurality of tape guides may be provided.

Further, the structure of the tape guides 4 and 5 itself is not limited to the above-mentioned plate-like one, and the point is that the heights of the portions of both guides acting on the magnetic tape 3 from the sliding contact surface 1a may be different.

Further, in the above-mentioned configuration, the magnetic head is displaced in the A and B directions in FIG. 5, but instead of this, the magnetic tape 3 is displaced in the A and B directions, so that the magnetic tape 3 at the tape guides 4 and 5 is moved. The height from the sliding contact surface 1a may be changed.

[Effect] As is apparent from the above description, according to the present invention, a tape guide that records and reproduces information by slidingly contacting a magnetic tape and restricts the magnetic tape running position on both sides of the magnetic tape sliding contact surface. In the magnetic head in which the tape is fixed, the tape guide has a travel restricting portion having a gap portion having substantially the same width as the width of the tape, and a travel portion having a width portion larger than the width of the gap portion of the travel restricting portion. The non-restricting portion is provided at different positions in the substantially perpendicular direction of the magnetic tape sliding contact surface, and the running restricting portion of one tape guide in the substantially perpendicular direction of the magnetic tape sliding contact surface. By adopting a configuration in which the arrangement position of the other tape guide and the non-traveling restriction portion coincide, the magnetic tape can be regulated and guided to the optimum traveling position in any traveling direction. Even better recording the running direction, it performs the reproducing operation. Further, the configuration of the present invention is extremely simple and can be realized at low cost.

[Brief description of drawings]

1 and 2 are perspective views showing the structure of a conventional magnetic head and a top view of a magnetic tape sliding surface, and FIGS. 3 and 4 are structures of a magnetic head according to an embodiment of the present invention.
FIG. 5 is a perspective view showing the positional relationship between the head and the magnetic tape, which differs depending on the tape running direction, and FIG. 5 is an explanatory view showing the displacement of the head of the embodiment according to the tape running direction. 1 …… Main body, 1a …… Magnetic tape sliding contact surface 2 …… Magnetic core, 3 …… Magnetic tape 4,5 …… Tape guide 4a, 5a …… Arms, 4b, 5b …… Tip 4c, 5c… …beneath

Claims (1)

[Claims] 1. A magnetic head in which tape guides for recording and reproducing information by slidingly contacting a magnetic tape and fixing a magnetic tape running position are fixed on both sides of a sliding surface of the magnetic tape. A travel restricting portion having a gap portion having a width substantially the same as the width of the tape and a travel non-restricting portion having a gap portion having a width larger than the width of the gap portion of the travel restricting portion are substantially formed on the magnetic tape sliding contact surface. Are provided at different positions in the vertical direction, and in the substantially vertical direction of the magnetic tape sliding contact surface,
A magnetic head, wherein the travel restricting portion of one tape guide and the travel non-restricting portion of the other tape guide are arranged at the same position.