JPS5938915A - Magnetic head - Google Patents

Abstract

PURPOSE:To simplify a tape driving system and to improve the input/output characteristics of a magnetic head, by providing a limiter which controls the position of the magnetic tape width direction at one or both of the upper and lower ends in the width direction of a magnetic head main body so that the limiter has a light touch to the edge of a magnetic tape. CONSTITUTION:A limiter 8 which controls the tape width direction variation while a tape 3 of a record/reproduction magnetic head 5 is traveling toward an arrow (a) is set flat so that a projecting degree delta larger than the thickness of the tape 3 is secured at the upper part of the main body of the head 5 and that the limiter has a light touch to the edge of the tape 3. Otherwise pins 9 and 9 are provided at both upper sides of the head 5 in place of the limiter 8. It is also possible to set the limiter at the lower part or both upper and lower parts of the head 5. Thus a tape guide pin containing a limiter is not required, and therefore the tape vibration is eliminated. This can stabilize the input/output characteristics and at the same time simplify a tape driving system.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording/reproducing apparatus in which a magnetic head has a magnetic tape running position regulating limiter.
In order to accurately input and output signals to and from the tape, it is necessary to suppress tape running fluctuations as much as possible.
As illustrated in FIG. 1, a non-rotating tape guide pin A equipped with a limiter 1 is generally installed on the upstream side, that is, in the direction opposite to arrow a, to restrict the widthwise fluctuation of the tape. is normal.

However, a kind of self-excited vibration is induced between the tape guide pin A and the tape 3 due to the dynamic frictional resistance generated between the sliding part 2 of the non-rotating tape guide pin A and the tape 3. In many cases, this adversely affects the smooth audio signal as well as the input/output characteristics of the video signal.

Furthermore, the non-rotating tape guide pin is often the cause of damage to the tape due to sliding between the tape guide pin A and the tape 3. In order to improve the sliding characteristics between the guide pin and the tape, the contact part 6 of the rotating body shown in FIG.
When using a tape guide pin with a 300 mm diameter, the uneven rotation of the rotating body 6 due to the influence of shaft runout, play between the roller 6 and the main shaft 4, bearing play, etc. will directly lead to vibration of the tape, which will also cause damage to audio and video signals. adversely affects the input/output characteristics of

OBJECT OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional art.In particular, in order to improve the input/output characteristics of audio signals, a magnetic head is provided which simplifies the tape running system and improves the sliding performance of the deck side with respect to the tape. This is what we provide.

Structure of the Invention The present invention is composed of a magnetic head and a limiter for regulating the position in the width direction when the magnetic tape is running.The present invention simplifies the magnetic tape running system, eliminates tape vibration factors, and improves the signal output in the magnetic head. It has the unique effect of stabilizing the input/output characteristics of

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to sections.

In FIG. 3, 5 is a magnetic head, 8 is a limiter installed on the magnetic head for regulating widthwise variation during tape running, and 3 is a tape. The limiter 8 not only suppresses fluctuations in the tape width direction when the tape is running, but also functions to secure the position of the audio signal recorded on the tape and to minimize loss during playback. The limiter shape is a flat plate. The limiter installation position must be set on the magnetic head 5 at a position where it just contacts the widthwise end of the tape when the tape 3 runs normally.

+) Mitter 8 is a device that slides lightly against the tape edge to suppress fluctuations in the tape width direction, and is a method of regulating the tape width direction in the running system of the recording/reproducing device in which it is used, as shown in Fig. 3. In addition to the upper regulation law that regulates the tape from the upper side in the tape width direction, a non-regulation law that regulates the tape from the lower side in the tape width direction, and the both-side regulation law that imposes regulation from both the upper and lower ends of the tape width. Especially in the case of Western regulatory law,
In principle, the distance between the upper and lower limiters must match the tape width dimension.

The protrusion amount δ of the limiter 8 is set to be greater than or equal to the tape thickness.

In addition, it is not necessary to cover the entire surface of the tape sliding part on the magnetic head, and the material used is a resin such as Ziracon, which has good sliding properties with the tape edge. In some cases, it also greatly contributes to an improvement in tape life with respect to tape edges.

In the above configuration, on the main body of the magnetic head 5, the -1
By arranging the IJ transmitter 8, there is no need to install the tape guide pin A just before the magnetic head, which is conventionally used. This has conventionally caused problems when the tape slides at the non-rotating tape guide pin portion. The applied tension becomes zero, which is effective in preventing vibration of the tape itself and making it difficult for the tape to be damaged. Furthermore, tape vibrations due to uneven rotation that occur when a rotating tape guide is used do not occur.

Note that the shape of the limiter for restricting variation in the tape width direction indicated by 8 in FIG. 3 is merely an example, and various applications can be considered for the purpose of fulfilling its function. For example, by using several pins indicated by 9 in Fig. 4, it is possible to substitute the function as a limiter.Furthermore, using the same principle, when regulating the tape from the bottom, or It can also be applied when regulating from both sides. When the pin 9 is used, the contact area with the tape edge becomes smaller, and the sliding property of the tape 3 against the edge becomes better.

In addition to being set on the magnetic head as part of the magnetic head 5, these limiters are used after positioning adjustment (azimuth adjustment, height adjustment, etc.) to improve the input/output characteristics of the magnetic head. , may be set via adhesive or other units.

That is, the magnetic head portion may have a structure in which a limiter having the ability to restrict widthwise fluctuations with respect to the tape is provided on the magnetic head body.

Effects of the Invention According to the present invention, due to the effect of the 11 points provided on the magnetic head body to suppress fluctuations in the tape width direction,
This eliminates the tape guide pin with a limiter that is commonly used in conventional magnetic recording and reproducing devices, thereby eliminating the cause of tape vibration. Therefore, this effect makes it possible to stabilize the signal input/output characteristics of the magnetic head. Furthermore, it becomes possible to simplify the running system itself, which has significant practical effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the current magnetic head configuration, FIG. 2 is a perspective view of a tape guide pin having a sliding portion of a rotating body, FIG. 3 is a perspective view of an embodiment of the present invention, and FIG. The reason is a perspective view of another embodiment. 1... Limiter, 2... Non-rotating tape sliding part, 3... Tape, 4... Tape guide pin main shaft, 5... ...Magnetic head, 6...
... Rotating body tape sliding part, 7 ... Base, 8
...Limiter, 9...pin. Name of agent: Patent attorney Toshio Nakao and 1 other person
IFgJ Figure 2 Figure 3 Figure 4

Claims (3)

[Claims] (1) A magnetic head body that can record and play back information on a magnetic tape, and a magnetic tape end attached to the magnetic head body that is attached to the magnetic tape at the upper end and/or lower end in the width direction of the magnetic tape. and a limiter for regulating the position of the magnetic tape in the width direction, which is installed in light contact with the magnetic head body and is set so that the amount of protrusion from the sliding surface of the magnetic tape relative to the magnetic head body is greater than or equal to the thickness of the magnetic tape. magnetic head. (2) The magnetic head according to claim 1, wherein one or more pins are used as the limiter. (3) The magnetic head according to claim 1, wherein the limiter is made of a resin material.