JPH0991613A - Head device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always obtain a high-definition reproducing sound for a combination head provided independently with a recording head and a reproducing head by eliminating the phase deviation at the time of reproduction and realizing the satisfied state without making the touch of tape against the head depend on the assembling accuracy of the reproducing head. SOLUTION: The reproducing head 2 is composed of a thin film head prepared on the tape running surface without arranging a separate member for protecting a head gap part formed with a thin film. For the recording head 1, a pad 5 in a cassette half is abutted through the tape at the time of recording/reproducing operation, but the thin film reproducing head 2 is arranged at the position not abutting on the pad 5 even at the time of recording/reproducing operation. The excellent reproducing performance is obtained without generating the phase lag depended on the reproducing frequency because no coil component is provided in the reproduicng head, and the device is constituted so that the high-definition sound is secured by the stable tape running independently of the positional relation between a top of the radius shape of the head tip and the head gap, because the member protecting the thin film part is not provided in the head.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head device in a so-called three-head type tape recorder capable of reproducing and confirming a recording state during recording.

[0002]

2. Description of the Related Art In recent years, with the improvement in performance of compact cassette tapes, a recording-dedicated head is used for recording and a reproduction-dedicated head is used for reproduction to maximize their respective performances. A three-head type tape recorder capable of so-called after-monitoring capable of reproducing and confirming the recorded state is positioned as a high-end model.

The above-described conventional head device will be described below with reference to the drawings. FIG. 5 is a plan view schematically showing the configuration of a conventional head device. In FIG. 5, a recording head 11 having a yoke winding structure and a reproducing head 12 having a yoke winding structure are attached to a head base 13.
A magnetic surface of a magnetic tape (hereinafter referred to as tape) 14 housed in a cassette half (not shown) comes into contact with the front surfaces of the recording head 11 and the reproducing head 12 to run. Tape 14
From the non-magnetic surface side, the pad 15 provided in the cassette half presses the tape 14 against the head surface. The tape 14 runs from the recording head 11 to the reproducing head 12 as shown by an arrow a.

FIG. 6 is a tape when the gap 12a of the reproducing head 12 is attached to the recording head 11 side in an inclined manner, and FIG. 7 is a tape when the head gap 12a of the reproducing head 12 is displaced from the R processing center at the tip of the reproducing head. Shows running. The details are omitted because it is a technology that is already very well known, but as is clear from the figure, there are dedicated heads for recording and playback, so each head is set to the optimum specifications for each purpose. By doing so, it is possible to maximize the performance of the tape. Further, since the recording and the reproduction can be performed at the same time, the so-called after-monitor function, which enables recording while confirming the recording state, enables recording without failure.

[0005]

However, in the configuration of the conventional head device as described above, since there is no pressing force of the pad 15 on the reproducing head 12 as shown in FIG. It is small and has a problem that the contact state with the reproducing head 12 when the tape is running, that is, the so-called tape touch is very delicate. For example, as shown in FIG.
When the position of a is located closer to the recording head side than the R apex of the head, the gap 12a does not come into contact with the tape, and in order to avoid this, the gap position is set on the side opposite to the recording head as shown in FIG. If they are provided in a staggered manner, there is little room for the tapes to separate, and the problem of not contacting the tapes occurs as in the case of FIG.
This is not only a problem of the head device, but it is caused by the mechanism equipped with the head device, the variation of the cassette half, the deformation of the pad with the aging due to the usage time of the cassette, etc. Is extremely difficult to secure.

Further, although it is possible to maximize the performance of the tape by having dedicated heads for recording and reproducing independently and setting each to the optimum specifications, the yoke is wound. Since it is a winding type head, there is a problem in that a phase delay corresponding to the reproduction frequency caused by having a coil component is inevitable especially in the reproducing head, and the sound quality is deteriorated.

The present invention is intended to solve the above-mentioned problems of the conventional example, and eliminates any phase delay that occurs depending on the reproducing frequency, and always maintains the reproducing head without pad pressure. The purpose of the present invention is to provide a head device that can ensure stable tape running.

[0008]

To achieve the above object, the head device of the present invention has, as a first configuration, a recording head and a head gap formed of a thin film to protect the head gap portion. A reproducing thin film head having a tape running surface without a member, wherein the recording head is provided at a position where it abuts a pad in a cassette half via a tape during recording and reproducing, and the reproducing thin film head is It is arranged such that it is provided at a position where it does not contact the pad even during recording and reproduction.

Further, as a second configuration, in the first configuration, the recording head has a simple reproducing function, and the insertion amount of the recording head into the cassette half at the time of high speed reproduction is the same as that of the reproducing thin film head. It is also possible to adopt a configuration in which it is larger than the amount of insertion into the cassette half. More specifically, in the first and second configurations, the portion of the reproducing thin film head without the separate member for protecting the head gap portion is arranged on the side far from the recording head.

[0010]

According to the first aspect of the present invention, since the reproducing head does not have a coil component, a phase delay depending on the reproducing frequency does not occur, and the thin film portion protecting member is not provided. The head gap is always in contact with the tape regardless of the positional relationship between the R vertex of the R shape and the head gap, so that stable tape running can be ensured, and excellent reproduction characteristics and extremely high quality sound quality can be secured. Becomes

Further, in the second structure, since the thin film reproducing head hardly contacts the tape during high speed reproduction, the thin film head is not worn at all, and the magnetic powder of the tape is not attached to deteriorate the performance. Acts like.

[0012]

Embodiments of the thin film head of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a plan view schematically showing the configuration of a head device according to an embodiment of the present invention. In FIG. 1, the head base 3 is formed on the tape running surface without forming a recording head 1 having a structure in which a yoke is wound and a thin film for forming a head gap and providing another member for protecting the head gap portion. A reproducing thin film head 2 is attached, and the magnetic surface of a tape 4 housed in a cassette half (not shown) comes into contact with the front surfaces of the recording head 1 and the reproducing head 2 to run. From the non-magnetic surface side of the tape 4, the pad 5 provided in the cassette half presses the tape 4 against the head surface. The tape 4 runs from the recording head 1 to the reproducing head 2 as shown by an arrow a. As can be seen from the figure, the portion of the reproducing thin film head 2 which does not have a separate member for protecting the head gap portion is arranged on the side far from the recording head 1.

In FIG. 2, a reproducing thin film head 2 is a recording head 1.
FIG. 3 shows the tape running when the head gap 2a of the reproducing thin film head 2 is displaced from the R processing center at the tip of the head when it is mounted while being inclined to the side. FIG.
When the recording head 1 is configured so that the insertion amount into the cassette half becomes large (Δχ in FIG. 4) especially at high speed reproduction (hereinafter referred to as search) as compared with the reproducing thin film head 2. Indicates. At the time of this search, the tape 4 runs in either direction of the arrows a and b. Further, in this case, the recording head 1 has a simple reproducing function by being connected to a reproducing amplifier (not shown). This is not optimum even for a recording head because it is a winding type in which a yoke is wound, but it goes without saying that reproduction is possible.

As shown in FIG. 1, when the reproducing head is constituted by a thin film head having a head gap formed by a thin film, the thin film head does not have a coil component, so that a phase delay depending on the reproducing frequency does not occur. Therefore, it is possible to obtain high-quality reproduction characteristics that are extremely faithful to the original sound in the low range to the high range. Also from the viewpoint of running the tape, the contact state between the gap portion 2a of the reproducing thin-film head 2 and the tape 4 is always stable as is clear from FIGS. 2 and 3, and in any case, the head gap 2a.
The tape 4 always comes into contact with.

As shown in FIG. 4, at the time of high speed reproduction for searching, most of the reproducing thin film head 2 is the tape 4.
The recording head 1 comes into contact with the tape 4 first without making contact with the tape 4, and the presence or absence of a signal can be confirmed by the simple reproduction function. Therefore, at this time, the original reproducing thin film head 2 which is hardly in contact with the tape 4 is not worn at all, and magnetic powder of the tape 4 is not attached.

Needless to say, during normal reproduction, the head gap 2a of the reproducing thin film head 2 contacts the tape 4 as shown in FIGS.

[0017]

As described above, in the head device of the present invention, a reproducing head is constituted by a thin film head having a head gap formed by a thin film and the head gap portion is formed on the surface, and the head device of the present invention is the same as the conventional thin film head. Is not provided with a protective member for protecting the thin film portion, the reproducing head does not have a coil component, so a phase delay that depends on the reproducing frequency does not occur, and the thin film portion Since there is no protective member, stable tape running can always be secured regardless of the positional relationship between the R vertex of the R-shaped head tip and the head gap, and excellent playback characteristics and extremely high-quality sound quality can be secured.

During the search, the recording head is
The thin film head for reproduction is configured so that the amount of insertion into the cassette half is larger than that of the thin film head for reproduction, and the recording head has a simple reproduction function so that the presence or absence of a signal can be confirmed. Since it hardly contacts the tape, it will not be worn at all, and the magnetic powder of the magnetic tape, etc. will not adhere and the performance will not deteriorate.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of a head device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a case where the reproducing head is also installed while being inclined.

FIG. 3 is a plan view showing a case where the R vertex of the processing of the tip R of the reproducing head is also displaced from the reproducing gap of the reproducing head.

FIG. 4 is a plan view showing the head arrangement at the time of search.

FIG. 5 is a plan view showing the configuration of a conventional head device.

FIG. 6 is a plan view showing a case where the reproducing head is also installed while being inclined.

FIG. 7 is a plan view showing a case where the R vertex of the processing of the tip R of the reproducing head is also displaced from the reproducing gap of the reproducing head.

[Explanation of symbols]

 1 Recording Head 2 Playback Thin Film Head 2a Head Gap 3 Head Base 4 Tape 5 Pad

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Sakai 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Kenji Otani 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A recording head, and a reproducing thin film head having a tape running surface formed without forming a separate member for forming a head gap by a thin film and protecting the head gap portion, wherein the recording is performed at the time of recording and reproducing. The head for reproduction is provided at a position where it comes into contact with a pad in the cassette half via a tape, and the thin film head for reproduction is provided at a position where it does not come into contact with the pad even during recording and reproduction. apparatus. 2. The recording head has a simple reproducing function, and the insertion amount of the recording head into the cassette half at the time of high speed reproduction is larger than the insertion amount of the reproducing thin film head into the same cassette half. The head device according to claim 1, wherein: 3. The head device according to claim 1, wherein a portion of the reproducing thin film head which does not have a separate member for protecting the head gap portion is arranged on a side far from the recording head.