JPH0427606B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for assembling a rotating magnetic head device included in a magnetic recording/reproducing device.

<Prior art> Figs. 4 to 6 are explanatory diagrams illustrating a conventional method of assembling a rotating magnetic head device. Fig. 4 is a side sectional view showing the assembled state, and Fig. 5 is a lower cylinder portion. FIG. 6 is a side sectional view showing a state in which the rotating shaft is press-fitted into the flange.

Conventionally, as shown in FIG. 6, a transformer rotor 13 constituting a rotary transformer is fixed with adhesive or the like to the lower surface of a flange 2 press-fitted into a rotating shaft 1.
Further, as shown in Fig. 5, the transformer stator 5 constituting the rotary transformer is fixed to the inner surface of the lower cylinder 4 with adhesive or the like, and two rotary bearings 3 are press-fitted from the upper and lower surfaces of the lower cylinder 4. This forms a bearing mechanism for the rotating shaft 1. Then, the assembly consisting of the rotating shaft 1, flange 2, and transrotor 13 is assembled into the assembly consisting of the lower cylinder 4, rotating bearing 3, and transformer stator 5. At this time, the inner 3a of the rotating bearing 3 is inserted. In general, variations in positional dimensional accuracy tend to occur, so the gap dimension between the transformer rotor 13 and transformer stator 5 is within the allowable value ±
Difficult to settle within 15μm. Therefore, in order to keep this gap dimension within the allowable value, the upper surface of the transformer stator 5 and the inner 3 as shown in FIG.
Measure the dimension D between the upper surfaces of a and the dimension E between the lower surface of the flange 2 and the lower surface of the transrotor 13 shown in FIG. Adjustment shim 7 is inserted between the lower surface of flange 2 and the upper surface of inner 3a of rotary bearing 3 to perform adjustment.

In addition, in FIGS. 4 to 6, 14 is a screw for fastening the flange 2 and the upper rotating cylinder 8;
is a magnetic head fixed to the upper rotating cylinder 8;
10 is a screw for fastening the magnetic head 9 to the upper rotating cylinder 8; 13a is a lead wire connected to the transformer rotor 13; 11 is a relay board to which the lead wire 13a is connected; and 12 is a screw between the magnetic head 9 and the relay board 11. The transformer rotor 13 is connected to the magnetic head 9 via a lead wire 13a, a relay board 11, and a relay pin 12.

<Problems to be Solved by the Invention> However, in the conventional method of assembly in this way, an adjustment shim 7 is required to keep the dimension between the transformer rotor and the transformer stator within an allowable value. There is a problem that dimensional measurement work is required and the number of assembly work increases.

The present invention has been made in view of the above-mentioned actual situation in the prior art, and its object is to provide a rotating magnetic head device capable of keeping the dimension between the transformer rotor and the transformer stator within an allowable value without requiring adjustment shims. Our goal is to provide the following.

<Means for solving the problem> In order to achieve this object, the present invention fixes a transrotor to an upper rotating cylinder, and
The transformer stator is fixed to the lower cylinder, the lower cylinder and the rotating shaft with the flange press-fitted are assembled, and in this state, the dimensions are set by machining the upper surface of the flange using the lower surface of the lower cylinder as a reference position, and then the flange and transformer are assembled. It is configured to engage with an upper rotating cylinder to which is fixed.

<Function> Since the present invention is configured as described above, variations in manufacturing accuracy of the inner of the rotating bearing can be absorbed by machining the flange, and the lower cylinder and upper rotating shaft, which are normally set with high precision, can be absorbed through the flange. The cylinder can be used to set the gap size between the transrotor and the transstator, and therefore no adjustment shim is required between the flange and the inner of the rotating bearing.

<Example> An example of the method for assembling a rotating magnetic head device of the present invention will be described below with reference to the drawings.

1 to 3 are explanatory diagrams for explaining one embodiment of the present invention, in which FIG. 1 is a side sectional view showing the assembled state, FIG. 2 is a view showing the back side of the upper rotating cylinder, and FIG. FIG. 3 is a side view showing a state in which a rotating shaft having a press-fitted flange is assembled into a lower cylinder to which a transformer stator is fixed.

In this embodiment, the upper rotating cylinder 20
A transformer rotor 24 constituting a rotary transformer is fixed to the lower surface of the rotary transformer, that is, the same surface as the surface to which the magnetic head 9 is attached, with adhesive or the like. This upper rotating cylinder 20 has a hollow part 21 in the center.
has been formed. And, as shown in Figure 2,
The transformer rotor 24 and a printed circuit board 28 on which the magnetic head 9 is mounted are connected by a lead wire 27. On the other hand, a transformer stator 25 constituting a rotary transformer is fixed to a stepped portion 26 connected to a boss portion 23 disposed at the center of the lower cylinder 22 with an adhesive or the like. and. The rotary bearing 3 is press-fitted into this lower cylinder 22, and as shown in FIG. 3, the rotary shaft 1 with the flange 2 press-fitted is inserted until the flange 2 abuts the inner 3a of the rotary bearing 3, and then positioned on the rotary shaft 1. Insert color 6 for
Fix it. Then, in the state shown in FIG. 3, the lower cylinder 22 is adjusted so that the gap dimension between the transformer rotor 24 and the transformer stator 25 is within the tolerance of ±15 μm when the upper rotating cylinder 20 and the lower cylinder 22 are assembled. The upper surface 2a of the flange 2 is processed using the lower surface 22a of the flange 2 as a reference position. Note that the dimensional accuracy of the shapes of the upper rotating cylinder 20 and the lower cylinder 22 is set to be highly accurate. Next, the upper rotating cylinder 20 and the flange 2 are engaged so that the upper surface 21a of the hollow part 21 of the upper rotating cylinder 20 is engaged with the upper surface 2a of the flange 2 processed in this way,
The upper rotating cylinder 20 and the flange 2 are fastened together using screws 14. By this, the first
The rotating magnetic head device shown in the figure is completed.

In the embodiment configured in this manner, the gap dimensions between the transformer rotor 24 and the transformer stator 25 can be set within the allowable value without requiring adjustment shims, which means that dimension measurement work is required to arrange the adjustment shims. Assembling work can be done without any hassle.

<Effects of the Invention> As described above, the method for assembling the rotating magnetic head device of the present invention includes attaching the transrotor to the upper rotating cylinder, and machining and assembling the flange based on the bottom surface of the lower cylinder. Because of this, the dimensions between the transformer rotor and transformer stator can be kept within the allowable value without the need for adjustment shims as in the past. Without,
Compared to the conventional method, the number of assembly steps can be reduced and manufacturing costs can be lowered.

[Brief explanation of drawings]

FIGS. 1 to 3 are explanatory diagrams illustrating an embodiment of the method for assembling a rotating magnetic head device of the present invention.
Fig. 1 is a side sectional view showing the assembled state, Fig. 2 is a view showing the back side of the upper rotating cylinder,
Fig. 3 is a side view showing a state in which a rotating shaft with a press-fitted flange is assembled into a lower cylinder to which a transformer stator is fixed, and Figs. 4 to 6 are explanatory explanations of how to assemble a conventional rotating magnetic head device. In the figures, Fig. 4 is a side sectional view showing the assembled state, Fig. 5 is a side sectional view showing the lower cylinder part, and Fig. 6 is a side sectional view showing the state in which the rotating shaft is press-fitted into the flange. . DESCRIPTION OF SYMBOLS 1... Rotating shaft, 2... Flange, 2a... Upper surface, 20... Upper rotating cylinder, 21a... Upper surface, 22... Lower cylinder, 22a... Lower surface, 2
4...trans rotor, 25...trans stator.

Claims (1)

[Claims] 1 Rotation in which an upper rotating cylinder and a lower cylinder are arranged to face each other via a rotating shaft press-fitted into a flange, and a rotary transformer consisting of a transformer rotor and a transformer stator is arranged between the upper rotating cylinder and the lower cylinder. In the method for assembling a magnetic head device, the transrotor is fixed to the upper rotating cylinder, the transstator is fixed to the lower cylinder, and the lower cylinder and the rotating shaft into which the flange is press-fitted are assembled, and in this state. A rotating magnetic head device characterized in that the upper surface of the flange is machined to set dimensions using the lower surface of the lower cylinder as a reference position, and then the flange is engaged with the upper rotating cylinder to which the transrotor is fixed. How to assemble.