JP2566314Y2 - Magnetic head device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device installed in an audio device such as a tape recorder, and more particularly to a magnetic head device for an audio device having a cueing mechanism. It is.

[0002]

2. Description of the Related Art An example of a conventional magnetic head device will be described with reference to FIG. As shown in FIG. 5, first, the magnetic head 3 is set on the rotating substrate 2. An erasing head 4 is disposed on one side of the magnetic head 3. On the other side of the magnetic head 3, a tape guide 5 is arranged.

The magnetic head 3 has a gently raised sliding surface 3b on which the magnetic tape 50 slides. A magnetic core 3a having a gap 3c appears on the sliding surface 3b.

The tape guide 5 has a sliding surface 5a with which the magnetic tape 50 comes into contact during recording and reproduction.
Protrusions 5b and 5c for gripping the magnetic tape 50 are formed above and below the sliding contact surface 5a. As described above, the tape guide 5 includes the U-shaped guide portion 40.

The operation of audio equipment using the magnetic head device 1 will be described. First, the magnetic head device 1
Moves to the magnetic tape 50 side, and the magnetic tape 50 comes into contact with the sliding contact surface 5a of the tape guide 5, the sliding surface 3b of the magnetic head 3, the magnetic core 3a, and the erasing head 4. And
The magnetic tape 50 is wound up by a drive mechanism (not shown) and runs while sliding on the sliding contact surface 5a and the sliding surface 3b. When the magnetic tape 50 runs, the protrusions 5b and 5c of the tape guide 5 are
Of the magnetic tape 50 with respect to the magnetic core 3a.
To stabilize the running. Then, information on the magnetic tape 50 is detected by the gap 3c , and reproduction is performed.

However, in the magnetic head device 1, since the tape guide 5 has a U-shape, the magnetic tape 50 moves slightly up and down when running, and since there is only one tape guide 5, the magnetic tape device 50 is particularly designed as shown in FIG. In the case of a rotary reverse type like
Since the rotation is not always exactly 180 °, the running direction of the magnetic tape 50 with respect to the gap 3c is not constant. For this reason, there was a disadvantage that azimuth loss occurred.

[0007] The following problems have been solved.
This is a magnetic head device provided with a guide, and will be described with reference to FIGS.

As shown in FIG. 3, this magnetic head device 1
Reference numeral 0 denotes tape guides 6 and 7 on both sides of the magnetic head 3 as compared with the magnetic head device 1 which is one of the above-mentioned conventional examples.
And the guide portions 6 of the tape guides 6 and 7
0,70.

That is, the guide portion 6 of the tape guide 6
In FIG. 4, first, as shown in FIG. 4, convex portions 6d and 6e are provided above and below the sliding contact surface 6a of the magnetic tape 50. One of the protrusions 6d is formed with an inclined surface 6b that opens outwardly continuously to the sliding contact surface 6a. The other convex part 6
In e, a vertical surface 6c continuous with the sliding contact surface 6a is formed. Further, the guide portion 70 of the tape guide 7 has the same shape as the guide portion 60 of the tape guide 6.

The operation of audio equipment using the magnetic head device 10 will be described. When the magnetic tape 50 is running, the magnetic tape 50 includes sliding surfaces 6a, 7a of the tape guides 6, 7, a sliding surface 3b of the magnetic head 3, a magnetic core 3a, and an erasing head. 4 is sliding on. In particular, the guide portions 60 of the tape guides 6 and 7,
In 70, a magnetic tape 50 is formed on the sliding surfaces 6a and 7a.
At the same time, the upper end of the magnetic tape 50 slides on the inclined surfaces 6b, 7b. As a result, the magnetic tape 50
Of the other convex portions 6e, 7e are vertical surfaces 6c, 7c.
It runs while being pressed against. Therefore, the vertical movement of the magnetic tape 50 can be prevented, and since the tape guides 6 and 7 are attached to both sides of the magnetic head 3, the traveling direction and height of the magnetic tape 50 with respect to the gap 3c are always constant. become. Therefore, there is no deviation between the magnetic tape 50 and the gap 3c, and the tape can be run with the azimuth adjusted.

Next, the operation of the magnetic head device at the time of cueing of the magnetic tape 50 will be described. First, the magnetic head 3
Is slightly separated from the position with respect to the magnetic tape 50 at the time of recording and reproduction, and the magnetic tape 50 is brought into contact with only the magnetic core 3a. Then, the magnetic tape 50 is run at high speed by fast-forwarding, rewinding, or the like, and, for example, a portion of music recorded on the magnetic tape 50 that is not recorded is detected. The start of the music is performed by stopping the tape running.

However, when a cueing operation is performed by an audio device using the magnetic head device 10 shown in FIGS. 3 and 4, one end of the magnetic tape 50 is separated from the inclined surfaces 6b and 7b . For this reason, the magnetic tape 50 may move up and down during traveling, and the traveling may become unstable, and accurate cueing may not be performed. The same applies to the case of the magnetic head device 1 shown in FIGS.

In order to solve the above-mentioned problems, the present invention provides a recording,
It is an object of the present invention to provide a magnetic head device in which the tape travel is stable during reproduction and cueing.

[0014]

In order to achieve the above object, according to the present invention, in a magnetic head device provided with a tape guide on both sides of a magnetic head, the tape guide slides. A sliding surface and a pair of convex portions formed above and below the sliding surface, and one of the convex portions of each of the tape guides has a first inclined surface that opens outward continuously to the sliding surface,
A second inclined surface which is continuous with the first inclined surface and whose inclination angle with respect to the sliding contact surface is larger than the inclination angle between the first inclined surface and the sliding contact surface is formed. I have.

[0015]

According to the magnetic head device of the present invention, during recording and reproduction of a magnetic tape, one end of the tape comes into contact with the first inclined surface of one of the protrusions, and the magnetic tape is driven. Is pressed against the other convex side, the running of the magnetic tape is stabilized, and the tape is run in a state where the azimuth adjustment is automatically performed.

In the cueing operation, the magnetic tape is
Although it is separated from the sliding surface of the tape guide, the vertical movement of the magnetic tape can be restricted between the second inclined surface having a larger inclination angle than the first inclined surface and the other convex portion. Also, the running of the magnetic tape can be stabilized even during the cueing operation.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The same components as those in the above-described conventional example will be described with the same reference numerals.

As shown in FIG. 1, first, a magnetic head 3 is arranged on a rotating substrate 2. The erase head 4 is arranged on one side of the magnetic head 3. Further, tape guides 8 and 9 are arranged on both sides of the magnetic head 3, that is, on the other side facing one side of the magnetic head 3 and one side of the erasing head 4. The magnetic head device 100 of the present invention is configured as described above.

The tape guide 8 has a substantially U-shaped guide portion 80. The guide section 80 is formed of a magnetic tape 50.
Are formed with a sliding contact surface 8a that comes into contact therewith and convex portions 8e and 8f formed above and below the sliding contact surface 8a. A first inclined surface 8c which is continuous with the sliding surface 8a and has an inclination angle θ1 of, for example, 60 degrees with respect to the sliding surface 8a is formed on one of the convex portions 8e and 8f. Have been. Further, a second inclined surface 8b which is continuous with the first inclined surface 8c and whose inclination angle θ2 with respect to the sliding contact surface 8a exceeds 60 degrees and does not exceed 90 degrees is formed. The other convex portion 8f has a vertical surface 8d continuous with the sliding surface 8a and perpendicular to the sliding surface 8a. The guide portion 90 of the tape guide 9 has the same shape as the guide portion 80.

Next, the magnetic head device 100 of the above embodiment will be described.
The operation of recording, reproducing, and cueing to / from the magnetic tape 50 in an audio device (not shown) using the above will be described.

In recording and reproducing, first, the upper end of the magnetic tape 50 slides on the first inclined surfaces 8c and 9c of the tape guides 8 and 9. As a result, the lower end side of the magnetic tape 50 is pressed against the vertical surfaces 8d and 9d, so that the magnetic tape 50 can be caused to run with the azimuth adjustment automatically performed on the gap 3c .

When performing the cueing operation, the magnetic tape 50 is run at a high speed while only the gap 3c is in contact with the magnetic tape 50 as described in the conventional example.
During the cueing operation, the magnetic tape 50 holds the sliding contact surfaces 8a,
9a and the first inclined surfaces 8c, 9c, and the upper end of the magnetic tape 50 is located on the second inclined surface 8c.
The vehicle runs at a position close to b, 9b. Therefore, the magnetic tape
Since the tape 50 has a small or no degree of freedom to move up and down during running, it is possible to stabilize the running of the magnetic tape even during the cueing operation.

As described above, the magnetic head device 1 of the present embodiment
In the audio equipment using the 00, during recording and reproduction, the upper end of the magnetic tape 50 is connected to the first inclined surfaces 8c, 9c.
The tape running can be stabilized by sliding to c. Therefore, the magnetic tape 50 can travel on the gap 3c with the azimuth adjustment automatically performed. During the cueing operation, the upper end of the magnetic tape 50 is inclined with respect to the second inclined surface by the inclined surfaces 6b, 7 of the tape guides 6, 7 of the conventional magnetic head device 50 shown in FIG.
closer to b. Therefore, the degree of freedom of the magnetic tape 50 to move up and down is reduced or eliminated, so that stable tape running can be obtained. Therefore, a malfunction in the cueing operation can be prevented.

It should be noted that the magnetic head device to which the present invention is applied is not limited to the rotary reverse type, but may be an auto-reverse type, and may not be a reverse type.

Further, the relationship between the first and second inclination angles θ1 and θ2 in the tape guide of the magnetic head device to which the present invention is applied may satisfy the relationship 0 <θ1 <θ2 <90 °. In particular, when the second inclination angle θ2 is not close to 90 degrees,
That is, when the tape has a certain degree of inclination, the magnetic tape 5
When 0 touches the second inclined surfaces 8b and 9b, the perpendicular drag received by the magnetic tape 50 from the inclined surfaces 8b and 9b is θ2 = 9.
It is smaller than the normal drag in the case of 0 °. Accordingly, the frictional force applied to the magnetic tape 50 is reduced, so that the magnetic tape 5
0, or the wear of the tape guides 8, 9 is smaller than when θ2 = 90 °.

[0026]

As is apparent from the above description, according to the magnetic head device of the present invention, the first inclined surface is brought into sliding contact with one of the convex portions of the tape guide, and the first inclined surface is slid more than the first inclined surface. Since the second inclined surface having a large inclination angle with respect to the surface is provided, azimuth adjustment can be automatically performed at the time of recording / reproducing, and the tape running is stabilized during the cueing operation and accurate cueing is performed. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic head device showing an embodiment of the present invention.

FIG. 2 is a side view of a tape guide of the magnetic head device shown in FIG.

FIG. 3 is a perspective view of a conventional magnetic head device.

FIG. 4 is a side view of a tape guide of the magnetic head device shown in FIG.

FIG. 5 is a perspective view of another conventional magnetic head device.

FIG. 6 is a side view of the tape guide of the magnetic head device shown in FIG.

[Explanation of symbols]

 1, 10, 100 Magnetic head device 3 Magnetic head 5, 6, 7, 8, 9 Tape guide 5a, 6a, 7a, 8a, 9a Sliding surface 8b, 9b Second inclined surface 8c, 9c First inclined Surface θ1, θ2 Inclination angle 50 Magnetic tape

Claims (1)

(57) [Scope of request for utility model registration] In a magnetic head device provided with tape guides on both sides of a magnetic head, the tape guide comprises a sliding contact surface on which the magnetic tape slides and a pair of convex portions formed above and below the sliding contact surface. In one convex part of each of the tape guides,
A first sloping surface which is open to the outside continuously with the sliding contact surface, and a sloping angle between the first sloping surface and the sliding contact surface which is continuous with the first sloping surface and is inclined with respect to the sliding contact surface; A magnetic head device, wherein a second inclined surface larger than a corner is formed.