JPH01276417A - Head position stabilizing device - Google Patents

Abstract

PURPOSE:To always support a head supporting member horizontally by giving a revolving moment to a head supporting member by using an elastic member, which gives oscillating force to an oscillating member, and supporting the head supporting member against this revolving moment. CONSTITUTION:A magnetic head supporting member 2 is provided on a fixed substrate 1 to secure linear reciprocatable motion in an arrow A direction. A pin 5 is planted in a back side tongue piece-shaped part 2a of the supporting member 2 and a twisting spring 7 is fitted to its pin to give the oscillating force to a pinch lever 6 which is oscillatably provided. When one edge of the spring 7 is locked to the lever 6 and the other edge is locked to a projecting part 1a which is planted in the substrate 1, force is given to the spring 7 in an arrow B direction and the revolving moment in a horizontal direction is operated to the supporting member 2. When the supporting member 2 is supported in three spots around a magnetic head 3, a proceeding side tongue piece shaped-part 2b is pressed through a projection 2c to the lower surface of the substrate 1 by the revolving moment. Then, a main body part is pressed substrate 1 and horizontally held.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head position stabilizing device that can stably adjust the azimuth of a head.

[Prior Art] In a tape recorder, a recording and reproducing magnetic head is made to move forward and backward in conjunction with recording and reproducing operations and stop operations, thereby bringing the magnetic head into contact with and away from the tape surface. This magnetic head is attached to a movable magnetic head support member, and is designed to prevent azimuth deviation from occurring with respect to the tape.

2. Description of the Related Art Conventionally, there is a head position stabilizing device in which a magnetic head is attached to a rotatable operating lever, and the magnetic head is moved forward or backward by rotation of the operating lever. However, such rotatable devices have a simple structure in which the control lever is rotatably supported by a support shaft, so the play in the center of rotation of the control lever and the sliding part during rotation may cause magnetic interference. The azimuth of the head tends to be out of alignment. Therefore, even if the azimuth is adjusted, as the operating lever is repeatedly operated, the azimuth becomes distorted due to the backlash of the operating lever, and stable recording and playback cannot be obtained.

Conventionally, a head position stabilizing device capable of solving this problem and stably maintaining azimuth adjustment is disclosed in Japanese Utility Model Publication No. 59-39310. As shown in FIG. 5 and FIG.
A ball member 103 is interposed in the ball member 103.
A head support member 10 with a magnetic head 104 mounted thereon.
5 is listed. The head support member 105 is pushed upward by an elastic member 106 disposed on the back surface of the fixed substrate 101 via the ball member 103, and is spaced apart from the surface of the substrate 101.

This head support member 105 has three guide elongated holes 104a and 104b around the magnetic head 104.

104C is bored, and this guide elongated hole 104a,
Holding members 107a are provided at 104b and 104c.

Ball members 108a and 108b for position regulation are inserted into the bent portion of the holding member by penetrating through the holes 107b and 107c.

108C is retained.

According to such a configuration, the head support member 105 pushed upward by the elastic member 106 has three position regulating ball members 108a.

Since it is held horizontally by 108b and 108c, good reproducibility of azimuth adjustment can be obtained.

[Problems to be Solved by the Invention] However, in the magnetic head position stabilizing device disclosed in Japanese Utility Model Publication No. 59-39310, the structure for maintaining the horizontality of the head support member becomes complicated, and the number of parts increases.
Large installations require space, which is disadvantageous in terms of cost reduction and miniaturization.

The present invention has been made in view of the above-mentioned problems, and by utilizing an elastic member that applies a swinging force to a swinging member to apply rotational moment to the head support member and horizontally support the head support member, It is an object of the present invention to provide a head position stabilizing device that can reduce the number of parts and achieve lower costs and smaller size.

[Means for Solving the Problems] The present invention includes a head support member, a swinging member, an elastic member that applies a swinging force to the swinging member and a rotational moment in the thickness direction of the head support member, and the The apparatus is characterized by comprising head support member supporting means for supporting the head support member against the rotational moment.

Mouth action] With such a configuration, a rotational moment can be applied to the head support member using the elastic member that applies a rocking force to the swinging member, so the head support member can be supported against this rotational moment. As a result, the head support member can always be supported horizontally.

[Example] An example of the present invention will be described below with reference to the drawings. 1 and 2 are plan views showing the state before and after operation, FIG. 3 is a front view, and FIG. 4 is a sectional view showing the schematic configuration.

A magnetic head support member 2 is provided on a fixed substrate 1 fixed within a tape recorder so as to be capable of linear reciprocating movement in the direction of arrow A. A magnetic head 3 is fixed on the magnetic head support member 2, and the angular deviation of the magnetic head 3 can be adjusted by a well-known azimuth adjustment mechanism (not shown). A tape guide 4 is attached to the side surface of the magnetic head 3 for regulating the running path of the magnetic tape. Further, the retreating side tongue portion 2 of the magnetic head support member 2
A pin 5 is installed in a, and the magnetic head support member 2 is attached here.
A screw spring 7 is attached as an elastic member that applies a swinging force to a pinch lever 6 that is swingably provided near the pinch lever 6 .

One end of the screw spring 7 is locked to the protrusion 6a planted on the pinch lever 6, and 1t! ! By locking the end to the protrusion 1a implanted in the fixed substrate 1, the torsion spring 7 applies force to the magnetic head support member 2 in the direction of the arrow B, thereby causing the force to be applied to the magnetic head support member 2 in the direction of the arrow C in FIG. In this embodiment, a window 1b is formed as shown in FIG. 3 in order to prevent the other end of the screw spring 7 from being obstructed by the protrusion 1a. .

The pinch lever 6 has a U-shaped cross section, and is supported on the fixed base plate 1 by a rotation pin 8 so as to be able to swing in the direction of the arrow, and a pinch roller 9 is rotatably supported at one end of the lever 6. ing. This pinch lever 9 is rotated counterclockwise by the torsion spring 7 as shown in FIG. 2 during recording and playback operation, and presses the pinch roller 9 against the capstan shaft 10, and when stopped, as shown in FIG. As the magnetic head support member 2 retreats, it rotates clockwise, separating the pinch roller 9 from the capstan shaft 10.

The operating lever 11 indicated by the two-dot chain line in FIGS. 1 and 2 is provided along the lower surface of the fixed substrate 1 as shown in FIG. 4, and the operating lever 11 is A guide hole drilled in the fixed substrate 1 is guided by a guide bottle implanted in the fixed substrate 1, and linearly reciprocates in the direction of arrow A-1.

The fixed substrate 1 is passed through the elongated hole 11a formed in the operation lever 11, and the tongue-like portion 2 on the forward side of the magnetic head support member 2 is inserted into the long hole 11a.
b, and at the same time insert the lower part of the pin 5 into the operating lever 1.
1 , the magnetic head support member 2 follows the operating lever 11 and reciprocates linearly in the direction of arrow A. At this time, the magnetic head support member 2 Positioning is performed in the left and right direction. In the figure, 12 is a button attached to the operating lever 11.

On the other hand, as head support member support means for horizontally supporting the magnetic head support member 2 against the rotational moment in the C direction, the forward side tongue portion 2b of the magnetic head support member 2 is inserted through the elongated hole IC of the fixed substrate 1. This forward tongue piece-shaped portion 2b
Hemispherical protrusions 2c to 2e are integrally formed on the upper surface of the magnetic head support member 2 and on the lower surfaces of both sides of the magnetic head support member 2.

When the magnetic head support member 2 is supported at three locations around the magnetic head 3 in this manner, the forward tongue portion 2b is pressed against the lower surface of the fixed substrate 1 via the protrusion 2c due to the rotational moment in the C direction. At the same time, the main body portion of the magnetic head support member 2 is pressed against the upper surface of the fixed substrate 1 via the protrusions 2d and 2e. The magnetic head support member 2 is held horizontally.

At this time, if there is insufficient force to press the main body portion of the magnetic head support member 2 and the advancing side tongue portion 2b against the fixed substrate 1, remove the -i of the torsion spring 7 from the protrusion 1a and leave it in a free state. As a result, as shown in FIG. 4, a force E is generated in the screw spring 7 that presses down the magnetic head support member 2, and the rotational moment C increases.
It is possible to obtain sufficient force to press the main body portion of the magnetic head support member 2 and the advancing side tongue portion 2b against the fixed substrate 1.

Therefore, according to such a configuration, the pinch roller 6
By horizontally supporting the magnetic head support member 2 using the screw spring 7 that applies a rocking force to the magnetic head support member 2, the structure can be simplified, so that the number of parts can be reduced, and the cost and size can be reduced.

In addition, the magnetic head support member 2 is always supported horizontally by the hemispherical protrusions 2C to 2e arranged around the magnetic head 3 due to the rotational moment in the C direction. The azimuth adjustment can be maintained with good reproducibility.

Further, the magnetic head support member 2 is attached to hemispherical protrusions 2c to 2e.
Since the magnetic head support member 2 can be supported by point contact, the drag resistance during linear reciprocating movement of the magnetic head support member 2 can be reduced.

Note that the present invention is not limited to the above embodiments,
Various modifications can be made without changing the gist.

[Effects of the Invention] According to the present invention, the number of parts can be reduced by reusing the elastic member that applies a swinging force to the swinging member to apply rotational moment to the head support member and horizontally support the head support member. , lower cost and smaller size can be achieved.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 is a plan view showing the state before operation, FIG. 2 is a plan view showing the state after operation, and FIG. 3 is the same embodiment. 4 is a sectional view showing a schematic structure of the same embodiment, FIG. 5 is a sectional view showing a schematic structure of a conventional device, and FIG. 6 is a perspective view of the same device. 1...Fixed board 1a...Protrusion 1b...
・Window IC...Long hole 2...Magnetic head support member 2a...Retreat side tongue piece-like part 2b...Advance side tongue piece-like part 2C to 2e...Protrusion 3...Magnetic head 4・・・
・Tape guide 5...Pin 6...Pinch lever 6a...Protrusion 7...Torsion spring
8...Rotating pin 9...Pinch roller 10...
・Capstan shaft 11...operation lever 11a・
...Long hole 12...Button Applicant Olympus Optical Industry Co., Ltd. Figure 3 Figure 4

Claims (1)

[Scope of Claims] A head support member; a rocking member; an elastic member that applies a rocking force to the rocking member and a rotation moment in the thickness direction of the head support member; 1. A head position stabilizing device comprising: a head support member supporting means for supporting the head against the pressure.