JP3510381B2 - Position adjustment mechanism for magnetic head - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head position adjusting mechanism for adjusting the position of a magnetic head, and more particularly to fine adjustment of the direction of a data read / write surface of the magnetic head. The present invention relates to a position adjusting mechanism of a magnetic head for performing the following. 2. Description of the Related Art When a magnetic head for reading and writing data on a magnetic tape is mounted, the orientation of a data reading / writing surface is adjusted by a position adjusting mechanism. FIG. 8 is a plan view showing the structure of a conventional magnetic head position adjusting mechanism. Here, a position adjusting mechanism of a magnetic head of a card type language learning machine is shown. The arm 31 serving as a base rotates about a shaft 32. A movable plate 33 is attached to the upper surface of the arm 31 so as to be swingable about a shaft 34. A ball or the like is used as the shaft 34, and the movable plate 33 is placed on the upper portion of the ball through a hole formed at an appropriate position. A movable plate 35 is mounted on the movable plate 33, and a magnetic head 36 is fixed on the upper surface of the movable plate 35. The movable plate 33 and the movable plate 35
Is supported by However, the movable plate 33 and the movable plate 35 can be moved within an appropriate range in the axial direction of the shaft 37. A screw 38 is attached to the movable plate 33. The screw 38 is screwed into a screw hole formed in the arm 31. By the degree of tightening of the screw 38, the rotation angle of the movable plate 33 about a straight line L12 which is perpendicular to the straight line L11 connecting the shaft 34 and the screw 38 and passes through the shaft 34 is adjusted. At the same time, the direction of the magnetic head 36 in the same direction is adjusted. [0005] A screw 39 is attached to the movable plate 33. The screw 39 is connected to the shaft 34 from the position of the screw 38.
It is attached at a position shifted about 90 degrees around the center.
The screw 39 is screwed into a screw hole formed in the arm 31. Due to the degree of tightening of the screw 39, the movable plate 33
The rotation angle about the straight line L11 is adjusted. At the same time, the direction of the magnetic head 36 in the same direction is adjusted. [0006] The arm 31 is provided with a mounting member 40. A screw 41 is screwed into a screw hole formed in the mounting member 40 in a direction parallel to the movable plate 33 and the movable plate 35. The head of the screw 41 is
The movable plate 35 is connected via the. Therefore, screw 4
The turning angle of the movable plate 35 about the shaft 37 is adjusted by the tightening degree of 1. At the same time, the direction of the magnetic head 36 in the same direction is adjusted. As described above, the adjustment screws 38, 39,
Fine adjustment of the direction of the magnetic head 36 is performed by adjusting the rotation angle of the movable plate 33 and the movable plate 35 by using 41. However, in such a position adjusting mechanism, since two movable plates 33 and 35 are used as members for adjusting the direction of the magnetic head 36,
The design and manufacturing were inefficient. When the adjustment is performed by the screw 41, the movable plate 35 rotates about the shaft 37. In this case, however, the gap between the magnetic head 36 and the capstan located on the opposite side changes greatly. Therefore, when the adjustment amount is large, there is a possibility that reading of magnetic data becomes impossible. The present invention has been made in view of the above points, and has as its object to provide a magnetic head position adjusting mechanism that is simple in design and manufacture. Another object of the present invention is to make it possible to adjust the direction of the magnetic head in which the gap between the capstan and the capstan changes little by rotation adjustment. [0011] In order to solve the above object SUMMARY OF THE INVENTION In the position adjusting mechanism of the magnetic head for adjusting the position of the magnetic head, about a fulcrum provided on the base A movable plate pivotally mounted on the movable plate, a magnetic head fixed to the movable plate, a first rotation adjusting mechanism for rotating the movable plate around a first axis passing through the fulcrum, A second rotation adjusting mechanism for rotating the movable plate around a second axis passing through a fulcrum and substantially perpendicular to the first axis; and a first rotation axis and a second rotation passing through the fulcrum. possess a third rotational adjusting mechanism for rotating said movable plate to a third axis substantially perpendicular to the axis, wherein the magnetic head
Indicates that the data read / write surface is substantially perpendicular to the first axis.
The movable plate is mounted so that the fulcrum is
The third rotation adjusting mechanism section
Is screwed into the screw hole formed in the base.
A screw for rotating the movable plate, and a tightening direction of the screw
A spring for urging the movable plate in a direction opposite to
The movable plate is turned around the third axis by screwing the screws.
Read / write data of the magnetic head
Is configured to adjust the angle of the direction along the
On the movable plate, the tip of the screw rotates the movable plate.
A contact plate is formed to abut in the direction in which
The portion is formed with a curved surface, and a position adjusting mechanism of the magnetic head is provided. The movable plate is mounted so as to be swingable about a fulcrum provided on the base. A magnetic head is fixed to the movable plate. The first rotation adjusting mechanism rotates the movable plate about a first axis passing through the fulcrum. The second rotation adjusting mechanism rotates the movable plate about a second axis passing through the fulcrum and substantially orthogonal to the first axis. The third rotation adjusting mechanism rotates the movable plate about a third axis passing through the fulcrum and substantially orthogonal to the first axis and the second axis. Thus, the direction of each axis of the magnetic head can be adjusted by one movable plate. Further, reading and writing surface of the data of the magnetic head, by attaching to be substantially perpendicular against the first shaft, when performing the other two axes of rotation, the gap between the magnetic head and the capstan There is almost no change. The movable plate is
It is supported by a rule-shaped member. Third rotation adjusting mechanism
Screws are screwed into the screw holes formed in the base.
The movable plate, and the spring is turned in the opposite direction
Energize the movable plate in the direction. The movable plate has a screw tip
An abutment plate that abuts in a direction to rotate the movable plate is formed,
The tip of the screw has a curved surface. Third rotation adjuster
The structure is configured by rotating the movable plate about the third axis.
Angle of the head along the data read / write surface
Adjust the degree. An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view showing the appearance of the language learning machine of the present embodiment. On the upper case 2 of the language learning machine 1, an operation unit 3 such as a power switch and an operation button, an audio output unit 4 for outputting audio from an internal speaker, and a transport reading unit 5 for a card are formed. I have. The transport reading unit 5 is formed in a groove shape. When the card 6 is inserted into the transport reading unit 5 from the right front side in the drawing, the card 6 is transported at a constant speed in the direction of the arrow. At this time, the data on the magnetic tape 6a attached to the card 6 is read. For example, utterances and sound effects of different English words are recorded on the magnetic tape 6a for each card, and are read out and output from the audio output unit 4 at the same time. FIG. 3 is a perspective view showing a schematic configuration of the inside of the language learning machine 1. A control circuit is mounted on a control board 11 in the language learning machine 1, and thereby a speaker 12, a motor 1
5. Control the magnetic head 16 and the like. The control board 11 is equipped with various switches, volumes, LEDs, and the like. Further, the control plate 11 includes an RA (not shown).
M is mounted, and audio data read from the magnetic tape 6a of the card 6 is temporarily stored. The rail 13 is provided with two plates 13 a, which are provided at an interval slightly larger than the thickness of the card 6.
13b. A capstan 14 and a magnetic head 16 are mounted near an intermediate portion of the rail 13. The capstan 14 rotates according to the driving of the motor 15 and conveys the card 6 inserted into the rail 13 backward. Further, a card sensing member 17 is provided on the front side (card insertion side) of the capstan 14. When the card sensing member 17 senses the insertion of the card 6, the capstan 14 operates. Further, a spacer 18 is attached to a rear side of the rail 13 such as the capstan 14. The spacer 18 is provided to maintain the attitude of the card 6 after the transport. The position and orientation of the magnetic head 16 are adjusted by the position adjusting mechanism 20.
FIG. 4 is a perspective view showing the appearance of the position adjusting mechanism section 20.
The arm 21 is mounted so as to be rotatable about a shaft 21a in a plane including the surface of the arm 21 and is urged toward the rail 13 by a pressing force of a spring (not shown). Near the end of the arm 21, a mounting member 21b
Is formed, and a screw 21c is screwed into the mounting member 21b. Since the arm 21 is biased toward the rail 13, the tip of the screw 21 c is in contact with the side surface of the rail 13. By adjusting the degree of tightening of the screw 21c, the distance between the magnetic head 16 and the capstan 14 shown in FIG. 3 is adjusted. A movable plate 22 is mounted on the upper surface of the arm 21. A hole 22a is provided near the center of the movable plate 22.
Is formed. In the hole 22a, a ball 28 described later is provided.
Are fitted. The movable plate 22 has the magnetic head 1.
6 is fixed. The movable plate 22 includes screws 23, 24, 2
The direction of the data read / write surface of the magnetic head 16 is adjusted by the buttons 5 and 26 as described later. Screw 23, 2
Reference numerals 4 and 25 are screwed into respective screw holes formed in the arm 21 and described later. On the other hand, the screw 26 is screwed with a screw hole (described later) of the mounting member 21 d formed on the arm 21, and the tip of the screw 26 is connected to the contact plate 2 formed on the movable plate 22.
2b. The mounting member 21d is connected to the mounting member 21e of the arm 21 via a spring 27. Next, a specific configuration of the position adjusting mechanism 20 will be described. FIG. 5 is a side view of the position adjusting mechanism section 20 as viewed from the magnetic head 16 side. A base 21f having a concave portion (not shown) is formed in the arm 21 at the center, and a ball 28 is provided in the concave portion of the base 21f. The upper portion of the ball 28 is fitted in the hole 22 a of the movable plate 22. Thereby, the movable plate 22
It is swingable with respect to the arm 21. A screw 23 penetrates one end of the movable plate 22. The screw 23 is screwed into a screw hole (not shown) formed in the arm 21. A spring 23a is provided between the head of the screw 23 and the movable plate 22. Thus, the movable plate 22 is always urged downward at the screw 23 side and can move up and down appropriately. A screw 25 penetrates the movable plate 22 at an end portion opposite to the screw 23. Screw 25 is attached to arm 2
1 is screwed into a screw hole (not shown) formed in the apparatus. By adjusting the degree of tightening of the screw 25, the angle of rotation of the movable plate 22 about an axis perpendicular to the drawing with the position of the ball 28 as a fulcrum is controlled. That is, screw 2
5, the movable plate 2 is opposed to the urging force of the spring 23a.
2 rotates clockwise in the drawing, and when the screw 25 is loosened, the movable plate 22 rotates counterclockwise in the drawing by the urging force of the spring 23a. By adjusting the rotation of the movable plate 22 in this manner, the angle of the read / write surface 16a of the magnetic head 16 in the drawing plane can be adjusted. FIG. 6 is a side view of the position adjusting mechanism 20 viewed from the opposite side of the magnetic head. A screw 24 penetrates through the movable plate 22 near the end opposite to the magnetic head 16. The screw 24 is screwed into a screw hole (not shown) formed in the arm 21. The movable plate 2 of the screw 24
A spring 24a is provided between the arm 2 and the arm 21. Thus, the movable plate 22 is always urged upward at the screw 24 side. By adjusting the degree of tightening of the screw 24, the rotation angle of the movable plate 22 about an axis parallel to the drawing is controlled with the position of the ball 28 shown in FIG. That is, when the screw 24 is tightened, the spring 24
The end of the movable plate 22 on the near side in the drawing is lowered against the urging force a. On the other hand, when the screw 24 is loosened, the front end of the movable plate 22 in the drawing rises by the urging force of the spring 24a. By adjusting the rotation of the movable plate 22 in this manner, the vertical angle of the read / write surface 16a of the magnetic head 16 can be adjusted. FIG. 1 is a plan view showing the structure of the position adjusting mechanism 20. The magnetic head 16 is fixed to the movable plate 22. The magnetic head 16 has a read / write surface 16a.
Are mounted so as to be substantially perpendicular to a straight line L1 connecting the center of the hole 22a and the center of the screw 24. The movable plate 22 has a contact plate 22b. The contact plate 22b is connected to a mounting member 21e of the arm 21 via a spring 27,
Is applied in the counterclockwise direction of the drawing by the elastic force of On the other hand, a mounting member 21d is formed on the arm 21. The mounting member 21d has a screw hole (not shown) formed therein.
6 is screwed. Then, the tip 26a of the screw 26
Is in contact with the contact plate 22b. Further, a tip 26a of the screw 26 is formed in a curved surface. FIG. 7 is a plan view showing the shape of the movable plate 22. The movable plate 22 has holes 22a for placing the movable plate 22 on the ball 28, and screws 23, 24, and 24 shown in FIG.
Holes 22c, 22d, and 22e through which 25 pass are formed, respectively. The holes 22c, 22d, and 22e are holes 22a
Is formed in a long hole shape so as to extend in the circumferential direction of an arc centered at. Returning to FIG. 1, with such a configuration, the movable plate 22 is provided with the screws 23, 24, 25 in the holes 22c, 22c.
d, 22e, the hole 22a (ball 2
It can be rotated to some extent in the plane of the drawing around the point 8). When the screw 26 is tightened in the state shown in the figure, the tip of the screw 26 pushes the contact plate 22b. As a result, the movable plate 22 rotates clockwise around the ball 28 in the plane of the drawing against the elastic force of the spring 27. On the other hand, when the screw 26 is loosened, the movable plate 22 rotates counterclockwise in the plane of the drawing around the ball 28 by the elastic force of the spring 27. Screw 2
By adjusting the rotation of the movable plate 22 by the use of 6, the angle of the read / write surface 16a of the magnetic head 16 in the left-right direction can be adjusted. As described above, in this embodiment, the magnetic head 1
6 is fixed to one movable plate 22 by screws 23, 24,
25, 26, and the springs 23a, 24a,
Since the rotation adjustment is performed in three axial directions by using the 27 or the like, the design and manufacturing are simplified, and the cost can be reduced. In this embodiment, the magnetic head 16 is
Since the read / write surface 16a is mounted so as to be substantially perpendicular to the straight line L1 connecting the center of the hole 22a and the center of the screw 24, the position of the magnetic head 16 is moved when the adjustment is performed by the screw 25 or the screw 26. Can be suppressed. In particular, in the case of adjustment using the screw 26, a change in the distance between the rail 13 and the capstan 14 can be reduced, and magnetic data can always be read accurately. In this embodiment, the tip 2 of the screw 26
6A is formed into a curved surface, so that friction with the contact plate 22b during adjustment by the screw 24 or the screw 25 can be reduced. Thereby, the adjustment work becomes smooth, and more accurate fine adjustment becomes possible. In this embodiment, an example in which the position adjusting mechanism of the magnetic head is applied to the language learning machine 1 has been described, but the present invention can also be applied to other devices such as a cassette tape recorder. As described above, according to the present invention, the magnetic head is fixed to the movable plate that is swingably mounted on the fulcrum provided on the base, and the first rotation is performed. The movable plate is pivoted about a first axis passing through the fulcrum by the movement adjustment mechanism, and the first plate passes through the fulcrum through the first pivot by the second rotation adjustment mechanism.
Rotating the movable plate about a second axis substantially orthogonal to the axis of
The third rotation adjusting mechanism rotates the movable plate about a third axis passing through the fulcrum and substantially orthogonal to the first axis and the second axis. The direction of each axis of the magnetic head can be adjusted. This simplifies design and manufacturing, and enables cost reduction. Further, in the present invention, the data read / write surface of the magnetic head is mounted so as to be substantially perpendicular to any one of the first axis, the second axis, and the third axis. Therefore, when the rotation about the other two axes is performed, the change in the gap between the magnetic head and the capstan can be almost eliminated. Therefore, magnetic data can always be read accurately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a configuration of a position adjusting mechanism. FIG. 2 is a perspective view showing an appearance of the language learning machine of the embodiment. FIG. 3 is a perspective view showing a schematic configuration inside a language learning machine. FIG. 4 is a perspective view showing an appearance of a position adjusting mechanism. FIG. 5 is a side view of the position adjusting mechanism as viewed from the magnetic head side. FIG. 6 is a side view of the position adjustment mechanism as viewed from the opposite side of the magnetic head. FIG. 7 is a plan view showing a shape of a movable plate. FIG. 8 is a plan view showing a configuration of a conventional magnetic head position adjusting mechanism. [Description of Signs] 1 Language learning machine 14 Capstan 16 Magnetic head 20 Position adjustment mechanism 21 Arm 22 Movable plate 22b Contact plate 23, 24, 25, 26 Screw 23a, 24a, 27 Spring 28 Ball

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 58-23026 (JP, U) Japanese Utility Model 61-98214 (JP, U) Japanese Utility Model 49-46667 (JP, Y1) Japanese Utility Model 1940- 7325 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 5/49 G11B 5/56-5/60

Claims (1)

(1) In a magnetic head position adjusting mechanism for adjusting a position of a magnetic head, a movable plate attached to be swingable about a fulcrum provided on a base. A magnetic head fixed to the movable plate; a first rotation adjusting mechanism for rotating the movable plate around a first axis passing through the fulcrum; and a first axis passing through the fulcrum. A second rotation adjusting mechanism for rotating the movable plate about a second axis substantially perpendicular to the third axis; and a third axis passing through the fulcrum and substantially orthogonal to the first axis and the second axis. possess a third rotational adjusting mechanism which rotates the movable plate around the said magnetic head, writing surface of the data, the first
The movable plate is mounted so as to be substantially perpendicular to the axis , the fulcrum of the movable plate is supported by a ball-shaped member, and the third rotation adjusting mechanism is a screw formed on the base.
Screw that rotates the movable plate by screwing with the hole
And the movable plate in the direction opposite to the direction in which the screws are tightened.
A spring for biasing, said movable by screwing said screw
By rotating the plate about the third axis,
Adjust the angle of the head along the read / write surface
The movable plate is configured so that the tip of the screw rotates the movable plate.
A contact plate that is in contact with the direction in which the screw is to be made, and a tip portion of the screw is formed into a curved surface;