JPH0430719Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a fixed magnetic disk device having a structure in which a magnetic disk, a head arm, etc. are assembled to a base.

A fixed magnetic disk device is used in which a magnetic disk or the like is sealed between a base and a cover to keep the inside clean, and is assembled in a clean room to avoid dust.

Therefore, assembly work is a process that generates dust,
For example, it is desirable that there is no soldering process (in which flux and the like become dust).

Prior Art FIG. 5 shows an example of a conventional fixed magnetic disk device.

In the figure, 1 is a magnetic disk, 2 is a head arm,
3 is a head arm shift mechanism, which is assembled to the base 4.

Reference numeral 5 denotes a flexible substrate having a substantially L-shape, and one end of which is fixed to the head arm 2.
At this location, the lead wire 7 drawn out from the magnetic head 6 and the lead wire 9 drawn out from the coil 8 are connected by soldering, respectively.

Lead wires 12 and 13 are drawn out from the coil 11 of the plunger 10 of the head arm shift mechanism 3, and these lead wires 12 and 13 are connected to the land 1 of the flexible substrate 5.
4 and 15 are connected by soldering.

Problems to be Solved by the Invention Since the lead wires 12 and 13 are thin and easy to break, the soldering of the lead wires 12 and 13 to the lands 14 and 15 must be done after the head arm shift mechanism 3 is assembled to the base 4. Ta.

For this reason, this soldering part cannot be cleaned after soldering, resulting in the generation of dust such as solder flux.

An object of the present invention is to provide a fixed magnetic disk device that solves the above problems.

Means for Solving the Problems The present invention provides a fixed magnetic disk device in which a magnetic disk, a head arm having a magnetic head at the tip, and a head arm shift mechanism are assembled to a base. The tip of the arm is attached to the head arm, the tip of the other arm is attached to the plunger, and this attached portion is connected to the end of the coil of the plunger of the head arm shift mechanism to form a subassembly. The head arm/head arm shift mechanism assembly is assembled to the base.

Function: All soldered parts can be cleaned in a sub-assembly state and are cleaned.

Therefore, in the assembly line of fixed magnetic disk devices, soldering is not necessary and dust generation is eliminated.

Embodiment FIG. 1 shows a head arm/head arm shift mechanism assembly 20 which constitutes the essential part of the present invention, and FIG. 2 shows a fixed magnetic disk device 21 formed by assembling the assembly 20 of FIG. 1.

In FIG. 2, reference numeral 22 denotes a base, to which a magnetic disk 23, a head arm 24, and a head arm shift mechanism 25 are assembled. These are covered by a cover (not shown).

The head arm 24 has a magnetic head 26 at its tip, a driving coil 27 at its rear, and a shaft 28.
It is rotatably supported.

The head arm shift mechanism assembly 25 is connected to the device 2.
When the magnetic head 26 is moved to the shopping zone outside the data area by pushing and rotating the head arm 24 when the device 1 is stopped, and the power of the device 21 is turned on, the head arm 24 is rotated into the data area. It is made up of a pusher 29 and a plunger 30.

Reference numeral 31 designates a flexible substrate, which, as shown in FIG. 3, is approximately T-shaped and has leg portions 32, an arm portion 33 extending to the left, and an arm portion 34 extending to the right. A wiring pattern is formed.

The lower end of the leg portion 32 has an insertion portion 3 for the connector.
6 are formed, and approximately rectangular attachment portions 37 and 38 are formed at the tips of the arm portions 33 and 34, respectively.

Reference numeral 39 denotes a wiring pattern extending from the leg portion 32 to the arm portion 33, the tip of which reaches the attachment portion 37, and lands 40, 41 are formed at the tip.

Reference numeral 42 denotes a wiring pattern extending from the leg portion 32 to the arm portion 34, the tip of which reaches the attachment portion 38, and lands 43, 44 are formed at the tip.

The parts of each land 40, 41, 43, 44 are the third
It is shown surrounded by a two-dot chain line in the figure.

By using this flexible substrate 31, the head arm 24 and shift mechanism 25 are made into a subassembly, as shown in FIG.

That is, as shown in FIG.
is screwed to the head arm 24, and another mounting portion 38 is screwed to the end face of the plunger 30. In FIG. 1, the arms 33 and 34 are in a twisted state, but this is for convenience of illustration; in reality, as shown in FIG. 4, they are not twisted but merely bent. .

In the mounting portion 37, a lead wire 45 drawn out from the magnetic head 26 is connected to the land 40 by soldering, and a lead wire 46 drawn out from the drive coil 27 is connected to the land 41 by soldering.

In another mounting portion 38, the plunger 30
One lead wire 48 at the end of the coil 47 is connected to the land 4.
3, another lead wire 49 is connected to each land 44 by soldering. Each lead wire 48, 49 has a short length.

As a result, the head arm 24 and the shift mechanism 2
5 is connected to the flexible substrate 31, and is formed into a subassembly.

Finally, clean the soldered parts. Therefore, subsequent generation of dust is eliminated.

Furthermore, the manufacturing work for the assembly 20 described above is performed at a location different from the assembly line for the fixed magnetic disk device 21, and even if soldering is performed, it will not adversely affect the environment on the assembly line for the device 20. do not have.

On the assembly line of the device 21, the cleaned assembly 20 is assembled to the base 22. Therefore, no dust is generated on the assembly line of the device 21.

Further, there is no need to perform connection work after assembling the head arm 24 and head arm shift mechanism 25, and the assembly of the device 21 can be carried out more efficiently.

Further, in the assembly 20 described above, the flexible substrate 31 is bent at a location indicated by the reference numeral 50 so that the arms 33 and 34 stand up relative to the legs 32, as shown in FIG. Arms 33 and 34 extending in the direction of the shift mechanism 25
There is no twist in it, just a bend.

Effects of the invention As explained above, according to the invention, the head arm and the head arm shift mechanism are connected by a flexible board and assembled to the base as a subassembly, so it is not necessary to solder the head arm and the head arm shift mechanism after assembly. This eliminates the need for dust generation on the fixed magnetic disk device assembly line, and the quality of the assembled fixed magnetic disk device can be improved accordingly.

Furthermore, since the subassemblies are assembled in advance, work efficiency can be improved compared to the case where they are assembled individually.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the head arm/head arm shift mechanism assembly that constitutes the main part of the present invention, Fig. 2 is a plan view of an embodiment of the fixed magnetic disk device of the present invention, and Fig. 3 is a development of the flexible substrate. 4 is a perspective view showing a flexible substrate taken out from FIG. 2, and FIG. 5 is a plan view of an example of a conventional fixed magnetic disk device. 20...Head arm/head arm shift mechanism assembly, 21...Fixed magnetic disk device, 22
... base, 23 ... magnetic disk, 24 ... head arm, 25 ... head arm shift mechanism,
26...Magnetic head, 30...Plunger, 31
...Flexible board, 32...Legs, 33,3
4... Arm part, 37, 38... Mounting part, 39, 4
2... Wiring pattern, 40, 41, 43, 44...
...land, 45, 46, 48, 49...lead wire, 47...coil.

Claims (1)

[Scope of Claim for Utility Model Registration] In a fixed magnetic disk device comprising a magnetic disk, a head arm having a magnetic head at the tip, and a head arm shift mechanism assembled to a base, the tip of one arm of a substantially T-shaped flexible substrate is as described above. The head arm head is attached to the head arm, the tip of the other arm is attached to the plunger, and this attached part is connected to the end of the coil of the plunger of the head arm shift mechanism to form a subassembly. A fixed magnetic disk device comprising an arm shift mechanism assembly assembled to the base.