JP2642266B2 - Magnetic head and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a magnetic head and a method for manufacturing the same.

[0002]

2. Description of the Related Art A multi-channel magnetic head used in an automatic ticket gate for railways has a plurality of cores arranged corresponding to track positions. The connecting gap line is perpendicular to the track direction (the running direction of the ticket etc.)
That each gap position is at a predetermined distance from the track side surface, each gap is at the top of the head,
In addition, it is an essential condition that the top is horizontal.

In producing a magnetic head, first,
The head is manufactured so that each gap is aligned with a straight gap line. Then, this head portion is fixed to a holder to complete a magnetic head. At this time, the above conditions (1) to (4) must be satisfied.

Therefore, conventionally, a magnetic head has been manufactured in a process as shown in FIG. First step: The top surface 1a of the head 1 is ground into a curved surface (temporary cylindrical grinding). Second step: The head 1 is inserted into the groove 2a of the holder 2, and the accuracy of the perpendicularity of the gap line CC with respect to the track direction, that is, the azimuth angle is determined. Third step: The resin is filled in the groove 2a while maintaining the accuracy in the previous step, and the head portion 1 is fixed to the holder 2 by solidification.

[0005] Fourth step: The position of the core 3 is adjusted to the track position by grinding the track side surface 2b.

Fifth step: The top surface 1a of the head portion 1 is finished and ground into a curved surface (main cylindrical grinding). At this time, the tilt of the core 3 is adjusted so that the gap of each core 3 is located at the peak position of the top surface 1a.

[0007]

In the prior art, three steps of a second step, a fourth step, and a fifth step are required for adjusting the alignment of the head unit 1 with respect to the holder 2, which is complicated and requires grinding. Because of the interposition of the structure, the alignment accuracy is affected by the conditions of the processing machine, and it is difficult to obtain sufficient accuracy, and it takes a long time to manufacture, which also increases the production cost.

Accordingly the present invention, the positioning of the head portion relative to the holder, and an object thereof is to provide a magnetic head and a manufacturing method thereof capable of performing easily and highly accurately.

[0009]

In order to achieve the above object, the present invention is configured as follows.

(1). In the magnetic head which fits and fixes the magnetic head portion in the groove of the holder, a spring is provided at the bottom of the groove to urge the head portion upward, and a vertex adjusting screw and an azimuth adjusting screw are provided on the side of the groove, respectively. The head part was adjusted and fixed by the screw while being urged upward by the spring, and the head part was fixed by filling a gap between the head part and the groove with resin.

(2). In a method of manufacturing a magnetic head in which a magnetic head portion is fitted and fixed in a groove of a holder, a spring for urging the head portion upward is provided at the bottom of the groove, and a vertex adjusting screw and an azimuth adjusting screw are respectively provided on side portions of the groove. A reference glass for horizontal and azimuth adjustment of the magnetic head with respect to the groove of the holder, and the magnetic head is loosely fitted into the groove of the holder and is urged upward by the spring. After the head is pressed and temporarily fixed by the screw, a resin is filled in a gap between the head portion and the groove and solidified.

[0012]

The spring causes the head to float and comes into close contact with the reference member, and the screw moves the float-like head member in the groove in a small amount in the required adjustment direction.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, FIG. 1 shows a state before mounting on a jig. 2 to 4 show a state in which the jig is attached to the jig. However, in order to simplify the drawings, unnecessary members are omitted as appropriate.

1, 2, and 4, the holder 20
Is formed with a groove 20a large enough to allow the head portion 1 to be loosely fitted. A screw hole 40n for the apex adjusting screw 40 is formed in a side portion of the groove 20a and in a central portion in the longitudinal direction of the groove, and azimuth adjusting screws 41 and 42 are formed on both sides thereof.
Screw holes 41n and 42n are formed respectively,
Each screw is screwed in such a manner as not to protrude into the groove.

At the time of manufacturing the magnetic head, the holder 20 is mounted on the jig 50 by using the mounting bolts 46 as shown in FIGS. 3 and 4 using the mounting screw holes 46n formed on the track side surface 20b. You.

Next, a leaf spring 43 (see FIGS. 1 and 2) having a length along the length of the groove 20a is provided at the bottom of the groove 20a. This leaf spring
The shape as viewed from the longitudinal direction has a substantially U-shape that is open outward, and the opening side is upward. The head unit 1 is mounted thereon.

When these preparations are completed, the following contents:
Make adjustments.

Adjustment operation 1: The jig 50 is provided with a reference glass plate (optical flat) 44 which is gradually lowered while maintaining a horizontal state by means not shown.
When the glass plate 44 is lowered as shown by the arrow in FIG. 2, the glass plate is pressed against the top surface 1a of the head portion, and the urging force of the leaf spring 43 is applied. In this state, while confirming by observing interference fringes that the top surface 1a is uniformly adhered to the glass plate in the longitudinal direction, the glass plate is placed at a predetermined height position, and the vertex adjusting screw 40 is set. To make the gap apex coincide with the head apex by the interference fringes. At the same time, the head tilt angle is adjusted to 90 ° with respect to the reference plane 50C of the jig shown in FIG.

Adjustment work 2: Azimuth adjustment screws 41, 4
By turning 2, the gap line CC is shaken to adjust the azimuth angle.

Adjustment operation 3: FIG.
As shown in the figure, a marking line is previously inserted in the cross, and one of the marking lines L1 is marked for a predetermined gap line position and the marking line L2 is marked for a predetermined core position. Therefore, the gap position is adjusted to the center position of the head by observing the gap of the head portion through the glass plate and matching the marking line L1 with the gap line CC.

Adjustment work 4: As shown in FIG. 3, two track adjusting screws 45 are screwed into the jig 50 so as to sandwich the head portion 1 in the longitudinal direction. Therefore, the screws 45, 45 are operated with both hands and moved back and forth to make the marking line L2.
And the predetermined position of the target core 3 are adjusted, and the dimension A between the reference plane 50C and the core 3 is determined.

The above four adjustment operations are performed simultaneously. When the adjustment is completed, the head portion 1 is temporarily fixed while holding the adjustment state with each adjustment screw, the reference glass plate is removed, the groove space is filled with resin, and after being solidified, the jig 50 is removed. .

As described above, since the adjustment of the screw is sufficient without any machining in the process, the accuracy is improved and the operation is simplified. In addition, while the conventional alignment adjustment process requires three processes, the number of processes is reduced to one process to be performed at the same time, so that the assembling time can be greatly reduced and the effect of stabilizing characteristics can be obtained.

In the above example, one of the two track adjusting screws shown in FIG. 3 can be replaced with a spring. However, it is necessary to make it weaker than the leaf spring 43 so as not to hinder the height adjustment.

[0025]

According to the present invention, the positioning of the head with respect to the holder can be performed easily and with high accuracy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnetic head according to the present invention.

FIG. 2 is a side view of the magnetic head according to the present invention in an adjustment stage.

FIG. 3 is a front view of the magnetic head according to the present invention in an adjustment stage.

FIG. 4 is a plan view of the magnetic head according to the present invention in an adjustment stage.

FIG. 5 is an explanatory diagram according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head part 20 Holder 20a Groove 40 Apex adjustment screw 41 Azimuth adjustment screw 43 Leaf spring

Claims (2)

(57) [Claims] 1. A magnetic head for fitting and fixing a magnetic head portion in a groove of a holder, wherein a spring for raising and biasing the head portion is provided at the bottom of the groove.
An apex adjusting screw and an azimuth adjusting screw are provided on the side of the groove, respectively, and the head is raised and urged by the spring while being adjusted and fixed by the screw, and the gap between the head and the groove is filled with resin. A magnetic head, characterized in that the head section is fixed. 2. A method of manufacturing a magnetic head in which a magnetic head portion is fitted and fixed in a groove of a holder, wherein a spring for raising and urging the head portion is provided at a groove bottom, and a vertex adjusting screw and a vertex adjusting screw are provided on a side portion of the groove. An azimuth adjustment screw is provided, and a reference glass for adjusting the magnetic head horizontally and azimuth with respect to the groove of the holder is used. The reference glass is loosely fitted in the groove of the holder and is fixed by the spring. A method for manufacturing a magnetic head, comprising: pressing the head that has been urged upward, temporarily fixing the head with the screw, and then filling and solidifying a resin in a gap between the head portion and the groove.