JPS5939310Y2 - Magnetic head moving device for tape recorder - Google Patents

Description

[Detailed description of the invention] This invention consists of a magnetic head moving device for a tape recorder,
More specifically, the present invention relates to a magnetic head moving device that minimizes frictional resistance during movement of a slide plate to which a magnetic head is attached.

In a tape recorder, a magnetic head is brought into contact with and separated from a tape surface in conjunction with the operation of a recording/playback operation button.

This magnetic head is attached to a slide plate that slides in conjunction with the operation of the recording and playback operation buttons.

This is because the magnetic head must be moved so that there is no azimuth deviation with respect to the tape, so sliding motion is used.

However, when the slide plate to which this head is attached is superimposed on the board and the sliding movement is performed in conjunction with the operation of the recording and playback operation buttons, the frictional resistance between the board and the slide plate becomes extremely large. This has the drawback that the movement of the operation button becomes very difficult.

If the frictional resistance is still large, the slide plate will not be able to slide smoothly, resulting in azimuth deviation.

The purpose of the present invention is to eliminate such drawbacks by using a ball member to support the slide plate on which the magnetic head is attached in a floating state from the substrate, and to bring the slide plate into point contact. By sliding the
To provide a moving device for a magnetic head of a tape recorder in which frictional resistance during sliding is extremely reduced.

The present invention will be explained below with reference to an illustrated embodiment.

FIG. 1 is a cross-sectional view of the main parts of the device of the present invention, in which a magnetic head 2 is mounted on an immovable substrate 1 fixed in a tape recorder.
A long hole 3 is bored in the direction of movement a.

A first ball member 4 is interposed in this elongated hole 3, and this ball member 4 is directed onto the surface of the substrate 10 by an elastic plate 5 disposed on the back side of the substrate 1. It is arranged so that it can be pushed up.

The elastic plate 5 is formed of a spring plate, and one end portion 5 of the elastic plate 5 is formed of a spring plate.
a is fixed to the substrate 1, and the other end portion 5b extends below the elongated hole 3, and the ball member 4 is lifted up onto the substrate by this extension portion.

A slide plate 6 to which the magnetic head 2 is attached is placed on the first ball member 4 arranged in this manner.

Therefore, the slide plate 6 is placed apart from the surface of the substrate 10.

This slide plate 6 is adapted to move in the direction of arrow a in conjunction with a recording/playback operation button (not shown).

On this slide plate 6, as shown in FIG. 2, a magnetic head 2 is attached near the rear of the center thereof.

FIG. 2 is a perspective view of the slide plate 60, and the slide plate 6 has guide holes 6a, 6b, and 6c formed at three locations around the area where the magnetic head 2 is fixed. .

That is, in this embodiment, guide elongated holes 6a, 6b, and 6c are formed in the front side of the magnetic head 2 and near the left and right rear sides of the magnetic head 2, respectively, in the direction of movement of the magnetic head 2.

Then, each of the guide slots 6a to 6c is connected to the holding member 7 of the position regulating ball member. 8. 9 is passing through.

That is, the holding member 7. 8. As shown in FIG. 1, each base end of 9 is fixedly attached to the substrate 1, and each free end ? ax8a, 9a rises upward, passes through each of the guide slots 6a to 6c, and extends onto the slide plate 6.

Furthermore, each of the free ends 7a, 8a, and 9a extending onto the slide plate 6 is bent at right angles toward the moving direction of the magnetic head 2.

The bent portions 7b, 8b, 9b are provided with holding portions 7c, 8c for position regulating ball members.

9c is fixed.

These holding parts 7c, 8c. 9C is composed of a box-shaped member with an open bottom surface, and each of the holding parts 7c, 8c, 9
Second, third, and fourth ball members i for position regulation are installed in c.
o, 1i.

12 are held respectively.

The second to fourth ball members for regulating this position 10°11.1
2. Its lower end is in point contact with the surface of the slide plate 60 which has been pushed upward by the elastic plate 5 via the first ball member 4.

In other words, the slide plate 6 lifted upward is held in a horizontal position by the three points on its surface coming into pressure contact with the second to fourth ball members 10, 11, 12 for position regulation. There is.

The device of the present invention is configured as described above.

According to the proposed device configured in this way, recording,
When the playback operation button is operated, the slide plate 6 slides in the direction of arrow a to bring the magnetic head into the recording or playback position in conjunction with this operation; however, the slide plate 6 moves. In some cases, the same slide plate has one point on its F side attached to the first ball member 4, and three points on its upper surface attached to the second, third, and fourth ball members 10, 11, and 12, respectively.
It slides in contact with the transfer.

Therefore, the area of frictional contact is minimal, and the movement is very light due to the rolling contact.

Moreover, even if the slide plate 6 moves, three points on the top surface and one point on the bottom surface
Since it is always supported by a point, the sliding plate moves completely in the same horizontal plane.

Therefore, the azimuth of the magnetic head that contacts the tape will not be distorted.

Further, since the hole into which the first ball member 4 is fitted is not a round hole but an elongated hole, the edges of the hole do not come into contact with each other as compared to a round hole, so that friction is further reduced.

As described above, according to the present invention, the weight of the slide plate is elastically received by one ball member located approximately in the middle of the second, third, and fourth ball members, and the weight of the slide plate is elastically supported by the free end of the holding member. Since the slide plate is pressed against the reference surface, the force required to slide the slide plate is extremely small, and the frictional resistance during sliding is extremely reduced, allowing for smooth operation and mounting of the magnetic head. Thus, it is possible to provide a magnetic head moving device having a sliding plate.

In addition, in the above embodiment, the second and third
, for holding the fourth ball member 10, 11.12,
Although the holding members γ, 8, and 9 are attached to the substrate 1, they may be fixed members and are of course not limited to the substrate 1 described above.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main part of a magnetic head moving device for a chief recorder showing an embodiment of the present invention, and Fig. 2 shows a slide plate with a magnetic head attached to it taken out from Fig. 1 above. FIG. 1...immovable substrate, 2...magnetic head,
3... Elongated hole, 4... First ball member, 5... Elastic plate, 6... Slide plate,
7. 8. 9...Holding member, 10°11.1
2...Second, third, and fourth ball members for position regulation.

Claims (1)

[Scope of utility model registration request] a long hole bored in a stationary substrate in the tape recorder in the direction of movement of the magnetic head; a first ball member interposed in the long hole; and a first ball member placed on the ball member; and a slide plate to which the magnetic head is attached, an elastic plate disposed on the back side of the immovable substrate to push up the first ball member, and a push-up operation of the slide plate by the elastic plate. , second, third, and fourth ball members for position regulation that contact and block three points around the magnetic hem 10 and position the slide plate in the same horizontal plane, and a length provided on the slide plate. a holding member passing through the hole and having one end fixed to the immovable substrate and the other end holding the second, third, and fourth ball members, respectively; Approximately in the middle of the fourth ball member, the first
A magnetic head moving device for a tape recorder, characterized by positioning a ball member.