JPH1031812A - Magnetic head adjustment mechanism - Google Patents

Abstract

(57) [Problem] To provide a magnetic head adjustment mechanism capable of adjusting the posture (tilt, azimuth), height, and X position of a magnetic head with a simple and low-cost configuration. Further, a magnetic head adjustment mechanism is provided in which the adjustment tools are unified and the adjustment work is improved. SOLUTION: A height adjusting metal plate 23 is attached to a base metal plate 3 of a magnetic head adjusting mechanism. The convex portion of the height adjusting metal plate 23 is engaged with the concave portion of the pedestal 2, and the height adjusting screw 21 is screwed to the tip. The tip of the height adjustment screw 21 is brought into contact with the base plate 3, and the magnetic head 1 is moved by the height adjustment screw 21.
Adjust the height of the. The attitude of the magnetic head 1 is adjusted by moving the tilt adjustment screw 6 and the azimuth adjustment screw 7 forward and backward. X
Position adjustment is performed by the tapered nut 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head adjusting mechanism for a magnetic recording / reproducing apparatus such as a video tape recorder.

[0002]

2. Description of the Related Art FIGS. 11 to 13 are views showing a magnetic head adjusting mechanism of a conventional magnetic recording / reproducing apparatus described in, for example, Japanese Utility Model Publication No. 6-4410, and FIG.
FIG. 12 is a front view, and FIG. 13 is a plan view.

In FIGS. 11 to 13, reference numeral 1 denotes a magnetic head;
Reference numeral 2 denotes a pedestal for fixing the magnetic head 1, 3 denotes a base metal plate for holding the magnetic head 1 and the pedestal 2 in an adjustable manner, 4 denotes a spring for applying a biasing force to the pedestal 2 in the Z direction, and 5 denotes one end of the spring 4. A screw that penetrates the pedestal 2 and is screwed to the base sheet metal 3;
Reference numeral 6 denotes a tilt adjustment screw for adjusting the magnetic head 1 in the A1-A2 direction by screwing into the pedestal 2 and abutting against the base metal plate 3.
Reference numeral 7 denotes an azimuth adjusting screw for adjusting the magnetic head 1 in the B1-B2 direction by threading the base 2 through the pedestal 2 and screwing the magnetic head 1. Reference numeral 8 denotes compression for urging the base metal 3 in the H1 direction and the X2 direction. A torsion spring, 9 is a threaded shaft that stands upright on the deck base 14, 10 is a cylindrical guide fitted to the threaded shaft 9, 11 is a base sheet metal that applies an urging force against the urging force of the compression torsion spring 8. 3, a height adjusting nut for adjusting the magnetic head 1 in the H1-H2 direction, 12 is a threaded shaft that stands upright on the deck base 14, and 13 is screwed into the threaded shaft 12 and partially Is a tapered nut abutted on the base sheet metal, and 15 is a locking portion of the compression torsion spring 8 provided on the deck base 14.

According to the conventional magnetic head adjusting mechanism configured as described above, the pedestal 2 is inclined by the screwing of the pedestal 2 and the tilt adjusting screw 6 by moving the tilt adjusting screw 6 forward and backward. The azimuth direction B1-B2 of the magnetic head 1 is adjusted by adjusting the tilting direction A1-A2 and moving the azimuth adjusting screw 7 forward and backward to incline the pedestal 2 by the resultant force with the urging force of the spring 4 provided on the screw 5. Perform The height direction H1-H2 of the magnetic head 1 is adjusted by the nut 11, and the X position X1-X2 is adjusted by tightening or loosening the taper nut 13.

[0005]

The conventional magnetic head adjustment mechanism is constructed as described above, and is provided with a tilt direction A1.
-A2 and the azimuth directions B1-B2 are adjusted by tilting of the pedestal 2 to the height direction H1-H2 and the X position X1-X.
The adjustment of 2 was performed by moving the base sheet metal 3. For this reason, according to the conventional example, the X position X1-X2 and the adjustment in the height direction are interdependent, and it is difficult to perform the adjustment at one time. To solve this problem,
In Japanese Patent No. 4410, the interdependency is eliminated by interposing a lever member between the taper nut 13 for adjusting the X position and the base metal plate 3. However, according to such a configuration, there is a problem in that the number of components inevitably increases and the head adjustment mechanism becomes expensive.

In the conventional magnetic head adjusting mechanism, when an external force is applied to the magnetic head 1 or the pedestal 2 for some reason, the posture of the magnetic head 1 is easily changed due to the play between the threaded shaft 9 and the cylindrical guide 10. However, there is a problem that the tape running is adversely affected. For this reason,
In order to reduce the play between the threaded shaft 9 and the cylindrical guide 10, it is necessary to improve the accuracy of the shaft hole or lengthen the fitting length, and this has also become a factor of cost increase.

In the height adjustment using the threaded shaft 9 and the nut 11, it is necessary to prepare a jig different from the other tilt adjustment screws 6, the azimuth adjustment screw 7, etc., specifically, a nut-specific driver. For this reason, it has been a factor that hinders unification of tools or takes time for adjustment.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a simple and low-cost configuration that can adjust the attitude (tilt, azimuth), height, and X position of a magnetic head. An object is to obtain a head adjustment mechanism. It is another object of the present invention to obtain a magnetic head adjustment mechanism that unifies adjustment tools and improves adjustment work.

[0009]

According to a first aspect of the present invention, there is provided a magnetic head adjusting mechanism for adjusting a posture and a height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium. , A pedestal for fixing the magnetic head, a base metal plate that adjustably supports the pedestal, first urging means for urging the pedestal to the base metal plate, and screwed to the pedestal and to the base metal plate. The tip abuts, or penetrates the pedestal and is screwed to the base metal plate, and a plurality of adjustment screws for adjusting the posture of the magnetic head fixed to the pedestal, disposed between the pedestal and the base metal plate, A height adjustment sheet metal having one end fixed to the base sheet metal and the other end in contact with the pedestal so as to apply a biasing force; and a threaded or penetrated end of the other end of the height adjustment sheet metal. The above Characterized by comprising a height adjustment screw engaged abutment or threaded into over scan sheet metal.

According to a second aspect of the present invention, there is provided a magnetic head adjusting mechanism according to the first aspect, wherein a recess is formed in a portion of the pedestal near the front surface of the magnetic head, and the pedestal of the height adjusting sheet metal is provided. A convex portion is formed at a portion where the concave portion and the convex portion are engaged with each other.

According to a third aspect of the present invention, there is provided a magnetic head adjusting mechanism according to the first aspect, further comprising: a support portion which abuts on the base sheet metal and defines a reference height of the magnetic head before adjustment. A fixing screw provided to face the support portion and serving as a rotation axis of the base sheet metal and fixing the base sheet metal; a nut having a tapered surface for regulating a rotation position of the base sheet metal; A second biasing means for biasing the nut to the tapered surface of the nut.

A magnetic head adjusting mechanism according to a fourth aspect of the present invention is characterized in that the height adjusting sheet metal according to the first aspect of the present invention is constituted by a part of the base sheet metal.

According to a fifth aspect of the present invention, there is provided a magnetic head adjusting mechanism according to the first aspect.
Is a compression spring disposed around the shafts of the plurality of adjusting screws.

According to a sixth aspect of the present invention, there is provided a magnetic head adjusting mechanism according to the first aspect.
Is characterized in that the biasing means is an elastic sheet metal screwed to the shafts of the plurality of adjusting screws.

A magnetic head adjusting mechanism according to a seventh aspect of the present invention is characterized in that the sheet metal according to the sixth aspect of the present invention is constituted by a part of the base sheet metal.

According to another aspect of the present invention, there is provided a magnetic head adjusting mechanism for adjusting the attitude and height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium. And a base metal plate having a plurality of U-shaped bent portions, and supporting the pedestal so as to be adjustable, and penetrating the pedestal and the U-shaped bent portions and passing through the base sheet metal. It is characterized by comprising a plurality of adjusting screws which are screwed together and adjust the posture or the height position of the magnetic head fixed to the pedestal.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. Embodiment 1 FIG. 1 is a perspective view of a magnetic head adjustment mechanism according to Embodiment 1 of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a front view thereof, and FIG. 4 is a plan view thereof. The same or corresponding parts as those in the related art are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 1 to FIG. 4, reference numeral 2A denotes a concave portion formed at a position close to the front surface of the magnetic head 1 of the pedestal 2, and reference numeral 16 denotes a base metal plate 3 provided on a deck base 14 before adjustment. A supporting portion for defining the height reference position of the magnetic head 1 is a height adjusting metal plate 23 arranged so that the convex portion 23A is in contact with the concave portion 2A, and 21 is a height adjusting metal plate 23 whose tip abuts on the base metal plate 3. Height adjusting screw screwed into
Is a fixing screw for fixing the height adjusting sheet metal 23 to the base sheet metal 3, 24 is a fixing screw for fixing the base sheet metal 3 of the magnetic head adjusting mechanism on the deck base 14 after adjusting the X position of the magnetic head 1, and 25 is a deck. A base sheet metal mounting boss arranged and fixed to the base 14.

The magnetic head adjustment mechanism of the present invention performs the adjustment as follows. First, the magnetic head 1 is set to H1-H
2 is adjusted in the height direction. Before the adjustment, the pedestal 2 is urged in the H2 direction by the spring 4, and the pedestal 2 is fixed to the base sheet metal 3 by screwing the azimuth adjustment screw 7 to the base sheet metal and elasticity of the height adjustment sheet metal 23. Have been. The height of the pedestal 2 and the magnetic head 1 is such that the tip of a height adjusting screw 21 abuts against the base metal plate 3,
The protrusion 23A of the height adjustment sheet metal 23 screwed into the base 1 is determined by engaging with the recess 2A of the pedestal 2. Here, when the height adjustment screw 21 is tightened, the height adjustment
3 moves in the H1 direction along the height adjustment screw 21, the rigidity of the height adjustment sheet metal 23 causes the protrusion 23A and the pedestal recess 2A to move integrally in the H1 direction, and the magnetic head 1 moves to the H1 direction.
Adjusted in the direction.

Conversely, when the height adjusting screw 21 is loosened, the tip of the height adjusting sheet metal 23 moves in the direction H2 along the height adjusting screw 21 and the spring force of the spring 4 causes the pedestal recess 2A and the sheet metal convex to move. The portion 23A integrally moves in the H2 direction, and the magnetic head 1
Is adjusted in the H2 direction.

Subsequently, the magnetic head 1 is moved in the tilting direction A1-
A2, adjustment is performed in the azimuth direction B1-B2. The tilt direction A1-A2 and the azimuth direction B1-B2 are directions orthogonal to each other, and there is no interdependence on the adjustment. Therefore, either of them may be adjusted first. Will be described. The posture of the pedestal 2 to which the urging force is applied in the H2 direction by the spring 4 is determined by the tip of the screw 6 attached to the pedestal 2 abutting on the base metal plate 3. Here, when the screw 6 is tightened, the rear part of the pedestal 2 moves upward with the concave portion 2A of the pedestal 2 as a fulcrum, and is adjusted in the A1 direction. At this time, the pedestal 2 is tilted, and the magnetic head 1 also moves in the height direction H2, so it is considered that readjustment in the height direction is necessary. Is formed at a position close to the front surface of the magnetic head 1, fluctuations in the position of the magnetic head 1 in the height direction are suppressed to a minimum, and readjustment in the height direction is almost unnecessary. vice versa,
When the screw 7 is loosened, the rear portion of the pedestal 2 moves downward with the concave portion 2A of the pedestal 2 as a fulcrum, and the adjustment in the A2 direction is performed.

Next, the magnetic head 1 is moved in the azimuth direction B1-
Adjust to B2. The pedestal 2 to which the biasing force is applied in the H2 direction by the spring 4 is provided on a contact surface between the pedestal 2 and the lower surface of the head of the azimuth adjusting screw 7 around a line connecting the pedestal recess 2A and the tilt adjusting screw 6. The posture in the B1-B2 direction has been determined. Here, when the azimuth adjusting screw 7 is tightened, the portion of the pedestal 2 which contacts the lower surface of the head of the azimuth adjusting screw 7 becomes H
The magnetic head 1 moves in two directions, and as a result, the magnetic head 1 is adjusted in the B1 direction about the axis as the rotation axis. Conversely, when the azimuth adjusting screw 7 is loosened, the portion of the pedestal 2 that contacts the lower surface of the head of the azimuth adjusting screw 7 moves in the direction H1. As a result, the magnetic head 1 moves in the direction B2 using the shaft as a rotation axis. Is adjusted.

Finally, the X-position value X1-X2 of the magnetic head 1
To adjust. An end surface of the base metal plate 3 urged in the X2 direction by the compression torsion spring 8 abuts on the tapered nut 13, and the X position is determined. Here, when the taper nut 13 is tightened, the contact surface moves in the X1 direction around the threaded shaft 12 against the urging force of the spring 8 due to an increase in the diameter of the taper with which the base metal plate 3 comes into contact. The adjustment mechanism is adjusted in the X1 direction. Conversely, when the taper nut 13 is loosened, the contact surface moves in the X2 direction due to the torsional force of the compression torsion spring 8 due to the decrease in the diameter of the taper with which the base sheet metal 3 contacts, and the magnetic head adjustment mechanism moves in the X2 direction. Adjustments are made.

In the magnetic head adjusting mechanism thus configured, after adjusting the X position of the magnetic head 1, the magnetic head adjusting mechanism is fixed by tightening the screw 24. Therefore, even if an external force is applied to the magnetic head 1 or the pedestal 2 for some reason after the fixing, the conventional problem that the attitude of the magnetic head 1 is easily changed is solved. In addition, the structure can be simplified and cost can be reduced as compared with the conventional case.
Can be adjusted with the same tool as the other adjustment screws 6 and 721. In the present embodiment, the X position X1-
The X2 adjustment is performed last, but in the present invention, the azimuth, tilt, and height are adjusted by adjusting the position of the pedestal 2.
Since only the X position adjustment is performed by adjusting the base sheet metal 3, the X position adjustment is first performed, and the magnetic head adjustment mechanism is fixed to the deck base 14 by the fixing screw 24, and then the height, tilt, and azimuth adjustment are performed. The adjustment may be performed on the pedestal 2, and the height adjustment and the X position adjustment do not have any interdependency as in the related art.

Embodiment 2 FIG. 5 is a perspective view of a magnetic head adjusting mechanism according to Embodiment 2 of the present invention.

In the first embodiment described above, the height adjusting plate 23, which is a separate member from the base plate 3, is fixed to the fixing screw 22.
, The cost reduction effect is insufficient. Therefore, in the present embodiment, the height adjusting sheet metal 3A is obtained by bending the base sheet metal 3 and has the same function as the height adjusting sheet metal 23 described in the first embodiment without requiring a separate member. Can be achieved.

As for the adjustment of the magnetic head 1, similarly to the first embodiment, the height adjustment in the H1-H2 direction is performed by the height adjustment screw 21, the tilt adjustment in the A1-A2 direction is performed by the tilt adjustment screw 6, B1-B2. Azimuth adjustment screw 7 for azimuth adjustment, X-position adjustment for X1-X2 direction for taper nut 13
The order of adjustment is the same as that of the first embodiment, and a detailed description thereof will be omitted.

In the magnetic head adjusting mechanism thus configured, the problem that the attitude of the magnetic head 1 is easily changed by some external force is solved, as in the first embodiment. Further, since the structure is further simplified as compared with the first embodiment, further cost reduction can be achieved.

Embodiment 3 FIG. 6 is a perspective view of a magnetic head adjustment mechanism according to Embodiment 3 of the present invention, and FIG. 7 is a side view thereof. In FIG. 7, the height adjusting metal plate 3A is partially omitted.

In the drawing, reference numeral 26 denotes a compression spring which passes through the tilt adjustment screw 6 and is held between the pedestal 2 and the base metal plate 3;
Reference numeral 27 denotes a compression spring which passes through the azimuth adjusting screw 7 and is held between the pedestal 2 and the base plate 3. The pedestal 2 is biased by the springs 26 and 27 in the direction H1. In the present embodiment, the tilt adjusting screw 6 penetrates the pedestal 2 and is screwed to the base plate 3 in the first embodiment.
Alternatively, it is different from 2 in that the spring 4 and the screw 5 for applying an urging force to the pedestal 2 are applied to the pedestal 2 instead of omitting the screw 5.

As for the adjustment of the magnetic head 1, similarly to the first or second embodiment, the height adjustment in the H1-H2 direction is performed by the height adjustment screw 21, the tilt adjustment in the A1-A2 direction is performed by the tilt adjustment screw 6, B1. The azimuth adjustment in the -B2 direction is performed by the azimuth adjustment screw 7, and the X-position value adjustment in the X1-X2 direction is performed by the taper nut 13.

In the magnetic head adjusting mechanism thus configured, the problem that the attitude of the magnetic head 1 is likely to be changed by some external force is solved as in the first and second embodiments. Further, the structure can be simplified and the cost can be reduced because the spring 4 and the screw 5 for applying the urging force to the pedestal 2 can be dispensed with as compared with the conventional or the first and second embodiments.

Embodiment 4 FIG. FIG. 8 is a perspective view of a magnetic head adjustment mechanism according to Embodiment 4 of the present invention. In the figure, 6A is a tilt adjustment metal plate screwed to the tilt adjustment screw 6, and 7A is an azimuth adjustment metal plate screwed to the azimuth adjustment screw 7, whereby the pedestal 2 is given an urging force in the H1 direction. In this embodiment, the tilt adjustment screw 6 and the azimuth adjustment screw 7 are used for the pedestal 2 and the sheet metal 6A.
7A are respectively screwed into the base sheet metal 3.

As for the adjustment of the magnetic head 1, similarly to the first to third embodiments, the height adjustment in the H1-H2 direction is performed by the height adjustment screw 21, the tilt adjustment in the A1-A2 direction is performed by the tilt adjustment screw 6, B1. The azimuth adjustment in the -B2 direction is performed by the azimuth adjustment screw 7, and the X-position value adjustment in the X1-X2 direction is performed by the taper nut 13.

In the magnetic head adjusting mechanism thus configured, the problem that the attitude of the magnetic head 1 is easily changed by some external force is solved, as in the first to third embodiments. Further, as compared with the above-described third embodiment, the structure does not require the compression springs 26 and 27 for applying a biasing force to the pedestal 2, so that the number of parts is reduced, and the cost can be reduced. According to the above-described first to fourth embodiments, the height adjusting screw 21 is screwed to the height adjusting metal plates 23 and 3A, and the tip is in contact with the base metal plate 3. The base sheet metal 3 penetrates the adjustment sheet metal 23, 3A.
The height adjusting plate 23,
Other configurations may be used as long as the elasticity of the 3A is regulated and the height of the magnetic head 1 can be adjusted.

Embodiment 5 FIG. 9 is a perspective view of a magnetic head adjusting mechanism according to Embodiment 5 of the present invention, and FIG. 10 is a side view thereof. In the figure, reference numerals 3B, 3C, and 3D denote bent portions of the base sheet metal 3 and have appropriate elasticity.

The height adjusting screw 21, the tilt adjusting screw 6, and the azimuth adjusting screw 7 pass through the pedestal 2 and the base sheet metal bending portions 3 B, 3 C, 3 D and are screwed to the base sheet metal 3. At this time, the bent portion 3B of the base sheet metal 3,
The initial bent shape of 3C and 3D is determined so as to apply the biasing force in the H1 direction of the base 2 with good balance.

As for the adjustment of the magnetic head 1, similarly to the other embodiments, the height adjustment in the H1-H2 direction is a height adjustment screw 21, the tilt adjustment in the A1-A2 direction is the tilt adjustment screw 6, B1- Azimuth adjustment screw 7 for B2 direction adjustment, taper nut 1 for X position adjustment in X1-X2 direction
Perform 3

In the magnetic head adjusting mechanism configured as described above, as in the other embodiments, the problem that the attitude of the magnetic head 1 is easily changed by some external force is solved. Further, the structure is further simplified as compared with the other embodiments, so that a significant cost reduction can be achieved.

[0040]

The present invention is configured as described above and has the following effects.

That is, the magnetic head adjusting mechanism according to the first aspect of the present invention includes a base for fixing the magnetic head,
A base metal plate that supports the pedestal so as to be adjustable, a first urging unit that urges the pedestal to the base metal plate, and a tip screwed to the pedestal and abutted on the base metal plate, or
A plurality of adjustment screws that penetrate the pedestal and are screwed to the base sheet metal to adjust the posture of the magnetic head fixed to the pedestal; and arranged between the pedestal and the base sheet metal, and one end fixed to the base sheet metal. A height adjustment sheet metal having the other end in contact with the pedestal to apply a biasing force; and a tip end of the other end of the height adjustment sheet metal being screwed or penetrated, and the tip end contacting the base sheet metal. Alternatively, since the magnetic head is provided with the threaded height adjusting screw, the attitude (azimuth, tilt) and height of the magnetic head can be adjusted with a simple and low-cost configuration. In addition, unlike the magnetic head adjustment mechanism described in the conventional example, there is no interdependence between the height position adjustment and the X position adjustment of the magnetic head, so that the adjustment can be completed at once. There is.

According to the magnetic head adjusting mechanism of the second aspect of the present invention, the attitude of the magnetic head is adjusted with the concave portion of the pedestal and the convex portion of the height adjusting metal plate as the fulcrum, and the fulcrum is adjusted. Because it is near the front of the magnetic head,
The height change in the posture adjustment of the magnetic head is minimized, and there is an effect that the re-adjustment becomes unnecessary.

According to the magnetic head adjusting mechanism of the third aspect of the present invention, the supporting portion which comes into contact with the base metal plate and defines the reference height before the adjustment of the magnetic head, and faces the supporting portion. A fixing screw for forming a rotation axis of the base sheet metal and fixing the base sheet metal, a nut having a tapered surface for regulating a rotation position of the base sheet metal, and a tapered surface of the nut for the base sheet metal. Since the second urging means is provided for urging the base sheet metal after the X position adjustment, the base sheet metal is fixed with screws, so that there is no play between the conventional threaded shaft and the cylindrical guide. Therefore, the posture of the magnetic head does not change even if some external force is applied, and the accuracy and reliability of tape running can be improved. Further, since a highly accurate threaded shaft and a cylindrical guide as in the conventional art are not required, the cost can be reduced. Furthermore, the attitude of the magnetic head,
Since the height and the X position can be adjusted with a unified tool, the adjustment work can be simplified and shortened.

According to the magnetic head adjusting mechanism of the fourth aspect of the present invention, since the height adjusting sheet metal is constituted by a part of the base sheet metal, the number of parts can be reduced.
Further cost reduction can be achieved.

According to the magnetic head adjusting mechanism according to the fifth and sixth aspects of the present invention, the first biasing means may be a compression spring disposed around the shafts of the plurality of adjusting screws, or a plurality of the adjusting springs. Is made of a sheet metal having elasticity screwed to the shaft portion of the adjusting screw, further simplification of the configuration and cost reduction can be achieved. Further, according to the magnetic head adjusting mechanism described in claim 7 of the present invention, since the sheet metal is constituted by a part of the base sheet metal, the cost can be further reduced.

According to the magnetic head adjusting mechanism of the present invention, the magnetic head adjusting mechanism has a pedestal for fixing the magnetic head and a plurality of U-shaped bent portions so that the pedestal can be adjusted. A base metal plate to be supported, and a plurality of adjustment screws that penetrate the pedestal and the U-shaped bent portion and are screwed to the base metal plate to adjust a posture or a height position of the magnetic head fixed to the pedestal. Therefore, the attitude (azimuth, tilt) and height of the magnetic head can be adjusted with a simple and low-cost configuration. Also in the present invention, unlike the magnetic head adjustment mechanism described in the conventional example, there is no interdependence between the height position adjustment and the X position adjustment of the magnetic head, so that the adjustment can be completed at once. There is an effect that can be made.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic head adjustment mechanism according to a first embodiment of the present invention.

FIG. 2 is a side view of the magnetic head adjustment mechanism of FIG.

FIG. 3 is a front view of the magnetic head adjustment mechanism of FIG. 1;

FIG. 4 is a plan view of the magnetic head adjustment mechanism of FIG. 1;

FIG. 5 is a perspective view of a magnetic head adjustment mechanism according to a second embodiment of the present invention.

FIG. 6 is a perspective view of a magnetic head adjustment mechanism according to a third embodiment of the present invention.

FIG. 7 is a side view of the magnetic head adjustment mechanism of FIG. 6;

FIG. 8 is a perspective view of a magnetic head adjustment mechanism according to a fourth embodiment of the present invention.

FIG. 9 is a perspective view of a magnetic head adjustment mechanism according to a fifth embodiment of the present invention.

FIG. 10 is a side view of the magnetic head adjustment mechanism of FIG. 9;

FIG. 11 is a side view of a conventional magnetic head adjustment mechanism.

FIG. 12 is a front view of a conventional magnetic head adjustment mechanism.

FIG. 13 is a plan view of a conventional magnetic head adjustment mechanism.

[Explanation of symbols]

Reference Signs List 1 magnetic head, 2 pedestal, 3 base metal plate, 4 spring, 5 screw, 6 tilt adjustment screw, 7 azimuth adjustment screw, 8 compression torsion spring, 12 threaded shaft,
Reference Signs List 13 taper nut, 14 deck base, 15 compression torsion spring retaining part, 16 magnetic head adjustment mechanism support part, 21 height adjustment screw, 22 height adjustment sheet metal fixing screw, 23 height adjustment sheet metal, 24 base sheet metal fixing screw,
25 Base plate mounting boss.

Claims (8)

[Claims] 1. A magnetic head adjusting mechanism for adjusting a posture and a height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium, comprising: a pedestal for fixing a magnetic head; A base metal plate that is supported in an adjustable manner; first urging means that urges the pedestal against the base metal plate; A plurality of adjusting screws that are screwed to the base sheet metal and adjust the posture of the magnetic head fixed to the pedestal; disposed between the pedestal and the base sheet metal; one end is fixed to the base sheet metal; A height-adjusting sheet metal that abuts on the pedestal to apply a biasing force; and a height at which the tip of the other end of the height-adjusting sheet metal is screwed or penetrated, and the tip is abutted or screwed on the base sheet metal. Key A magnetic head adjustment mechanism comprising an adjusting screw. 2. A concave portion is formed in a portion of the pedestal close to the front surface of the magnetic head, and a convex portion is formed in a portion of the height adjusting sheet metal that comes into contact with the pedestal, and the concave portion is engaged with the convex portion. The magnetic head adjustment mechanism according to claim 1, wherein 3. A support portion that abuts on the base sheet metal and defines a reference height of the magnetic head before adjustment, and is provided to face the support portion and forms a rotation axis of the base sheet metal and the base plate. A fixing screw for fixing the sheet metal, a nut having a tapered surface that regulates the rotational position of the base sheet metal,
2. The magnetic head adjustment mechanism according to claim 1, further comprising a second urging unit for urging the base sheet metal against the tapered surface of the nut. 4. The magnetic head adjusting mechanism according to claim 1, wherein said height adjusting sheet metal is constituted by a part of said base sheet metal. 5. The magnetic head adjustment mechanism according to claim 1, wherein said first urging means is a compression spring disposed around shafts of said plurality of adjustment screws. 6. The magnetic head adjustment mechanism according to claim 1, wherein said first urging means is an elastic sheet metal screwed to shafts of said plurality of adjustment screws. 7. The magnetic head adjusting mechanism according to claim 6, wherein said sheet metal is constituted by a part of said base sheet metal. 8. A magnetic head adjusting mechanism for adjusting the attitude and height of a magnetic head for recording a signal on a magnetic recording medium or reproducing a signal from the recording medium, comprising: a pedestal for fixing the magnetic head; A base metal plate having a U-shaped bent portion and supporting the pedestal so as to be adjustable, penetrating the pedestal and the U-shaped bent portion, screwing into the base metal plate, and being fixed to the pedestal. A plurality of adjusting screws for adjusting a posture or a height position of the magnetic head.