JPH03214481A - Head arm locking device for disk device - Google Patents

Abstract

PURPOSE:To improve assembling workability and reliability for connection by inserting a connector at the tip of a flexible printed board drawn out from a circuit board to the terminal of the coil of an electromagnetic means after the electromagnetic means is assembled. CONSTITUTION:The connector 32 is mounted at the tip 31a of the flexible printed board 31 drawn out from a prescribed circuit board 41 mounted at the inside or outside of a chassis in advance. After the electromagnetic means 15 is assembled in the tip of a mounting plate 10, the connector 32 at the tip 31a of the board 31 is inserted to the pair of terminals 44 of a pair of coils 14. Thereby, a part between both terminals 44 and the board 41 can be connected electrically with the board 31 and the connector 32. The board 31 and the connector 32 are separated sufficiently to a position not disturbing the assembling work of the electromagnetic means 15 while it is being performed, and the connector 32 is inserted to the terminals 44, therefore, no disturbance for the work occurs, which improves the assembling workability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a method of locking a head arm in a disk device, which is most suitable for application to, for example, a heart disk device, at the innermost circumferential position or outermost circumferential position of a disk-shaped recording medium. This relates to a hent arm candle device.

[Summary of the invention]

The present invention has an electromagnetic means in which a coil is wound around the outer periphery of a fixed iron core with a magnetic pole formed at the tip, and a movable iron core attached to a head arm is attracted to the magnetic pole of the pre-porridge of the fixed iron core. Accordingly, the hentoa J is configured to be locked at the innermost circumferential position or the outermost circumferential position of the disk-shaped recording medium,
The coil is connected to the coil by reversing the magnetic pole at the tip of the fixed iron core to release the I'' knock on the toe arm. By using Sore 1-Schizorpurin [board d2 1-Factor] for the connection F stage between the terminal of the El coil of the means and the predetermined circuit board 2, the ease of assembly and connection reliability can be improved. It is also Q that aims to improve the φfj property.

[Conventional technology]

FIG. 6 shows a conventional example of a bottom arm of a disk drive.

An arm bar 2 is vertically mounted on a chassis 1 constituting a sealed case, and a head arm 3 is mounted so as to be swingable in directions of arrows a and a' about an L axis 2. . A floating type heel 5 is attached to the tip of the head arm 3 via a suspension means 4 made of a plate, etc., and a voice coil 6 is attached to the other end of the head arm 3. Magnets 1, 1, and 3 (none of which are shown) are arranged above and below the voice coil 6 to constitute a voice coil motor 7 as a driving means.

And a heart disk 8 which is a disk-shaped recording medium.
is driven by a spindle motor (not shown), e.g.
The head arm 3 is oscillated in the directions of arrows a and a' by the voice coil motor 7 while being rotated at high speed in the direction shown in FIG. In this state, it is configured to reciprocate within the recording zone S in the directions of arrows a and a' to perform desired recording and/or reproduction.

On the other hand, in order to prevent the head arm 3 from swinging unexpectedly during transportation or the like and damaging the heel 5 and the recording zone S of the hard disk 8, the head arm 3 is moved to the inner circumference side or the outer circumference side of the recording zone S. A head arm locking device is provided for shifting the head arm 3 at the innermost circumferential position ID or the outermost circumferential position OD of the hard disk 8 that has been removed.

In the conventional belly arm candle device, a mounting plate 10 is screwed onto a chassis l with a plurality of screws l1, and a pair of parallel fixed iron cores 12 are installed horizontally on the tip of the mounting plate 10. A magnetoresistive magnet 13 is connected to the free ends of both fixed iron cores 12, and magnetic poles such as S poles and N poles are formed at the tips of these fixed iron cores 12, and these fixed iron cores I
The electromagnetic means 15 has a pair of coils 14 wound around the outer periphery of the electromagnetic means 2.

Then, by attracting the movable iron core I6 attached to the side surface of the other end of the head arm 3 to the magnetic poles at the tips of both fixed iron cores 12, the head arm 3 is moved to, for example, the innermost position ID. It consists of

Then, by energizing both coils] 4, both fixed iron cores 12
The innermost circumferential position ID of the hemlock arm 3 is unlocked by reversing the magnetic poles at the tips of the movable iron core I6 to release the adhesion of the movable iron core I6 to the tips of both fixed iron cores I2.

The bottom armrest lever 18 screwed onto the chassis 1 by the screws 7 is made of an elastic material such as rubber, and regulates the outermost position OD of the bottom arm 3, for example.

In the conventional navel arm candle device, after the electromagnetic means 15 is mounted on the chassis 1 by the mounting plate IO,
One end is soldered 42 to the board 4l at a predetermined turn ii'8, and the other end of the pulled out pair of glue leads ``b'343, etc. is soldered 45 to the terminal 44 of the pair of coils l4 of the electromagnetic stage l5.
Then, the terminals 44 and the circuit board 4l were electrically connected.

[Problem to be solved by the invention]

However, in a conventional head arm candle device, a connection structure in which a pair of terminals 44 of the coil 14 of the electromagnetic means 15 and a predetermined circuit board 41 are connected by soldering 45 of a pair of route wires 43, etc. Since the gas generated from the flux of the attachment 45 is trapped inside the sealed case made up of the chassis l, both lead wires 4 are connected to both terminals 44.
After soldering 45 the other end of 3, the soldered portion 45 had to be cleaned with alcohol each time in a very narrow space, resulting in very poor assembly workability.

In addition, the electromagnetic stage 15 is very small due to its structure, and the soldering process itself, in which a pair of lead wires 43 and the like are manually soldered 45 to a pair of small terminals 44, is very difficult to work with, and the soldering process itself is very inefficient. [[1 Defects are likely to occur, etc., half Hl attached 4
There was also the problem that the reliability of 5 was poor.

In addition, when incorporating the electromagnetic means 15 into the Nyashi 11,
It is also conceivable to attach half 11+J 45 in advance between the both ends 44 and the circuit board temporary 4l using a wire 43, etc.
During the assembly work when screwing the lead wire 43 upward, it is easy for the lead wire 43 etc. to get caught unexpectedly in various places on the chassis l.
3 was a problem in that it easily interfered with the assembly work of the electromagnetic 1,000-stage l5.

SUMMARY OF THE INVENTION An object of the present invention is to provide a head arm candle device that can improve assembly workability and connection reliability. [Means for Solving the Problems] In order to achieve the above object, the door/seven door candle device of the present invention has a coil terminal of an electromagnetic means in which a coil is wound around the outer circumference of a fixed iron core, and a predetermined circuit board. The connection means between the above-mentioned coil is constituted by a flexible printed circuit board pulled out from the circuit board, and a connector attached to the tip of the flexible printed circuit board and inserted into the terminal of the coil.

[Effect]

- The head arm candle device configured as in F.
After assembling the electromagnetic means, all you have to do is insert the connector at the tip of the flexible printed circuit board pulled out from the circuit board into the terminal of the coil of the electromagnetic means, so you can easily solder lead wires and other parts from the assembly process of the electromagnetic means. The alcohol cleaning work can be omitted.

〔Example〕

Hereinafter, an embodiment of a head arm candle device in which the present invention is applied to a heart disk device will be described with reference to FIGS. 1 to 5. Note that the same reference numerals are given to the same structural parts as in the conventional example shown in FIG. 8, and redundant explanation will be omitted.

First, as shown in FIGS. 1 to 4, the outer periphery of both coils 14 of the electromagnetic means 15 is surrounded by an elastic body 21 formed into a rectangular cylinder shape with rubber or the like.

A pair of upper and lower ribs 22 for positioning the coils l4 are integrally molded on the inner periphery of this elastic body 2l, and a pair of upper and lower positioning ribs 23 are integrally molded on the outer periphery.

Then, the electromagnetic means I5 is attached to the elastic body 2 on the tip of the mounting plate 10 screwed onto the chassis l with a plurality of screws 1l.
Place the rib 23 on the lower side horizontally through the F
It is fitted into the rib hole 24 formed in ilO. and,
A presser plate 25 formed into a U-shape made of synthetic resin or the like is fitted onto the upper side of the elastic body 21 from above, and the presser plate 25 is
At the same time, the upper rib 23 is fitted into the rib hole 26 formed in the mounting plate IO.
The electromagnetic means 15 is mounted on the tip of the mounting plate 10 so that it is locked against elasticity from the inside by a pair of locking portions 28 integrally formed at the tip.

Next, the connector 32 is attached in advance to the tip 31a of the flexible printed circuit board 3l pulled out from a predetermined circuit board 41 attached to the inside or outside of the chassis 1.

Then, as described above, the electromagnetic means 15 is attached to the chassis l.
After the above assembly, the pair of terminals 44 of the pair of coils 14
Insert the connector 32 at the tip 31a of the flexible printed circuit board 31 into the connector 32, and connect the flexible printed circuit board 3l and the connector 32 between both terminals 44 and the circuit board 4l.
It is configured to be electrically connected by.

The other end 3lb of the flexible printed circuit board 3l is soldered 34 to the circuit board 4l, and the tip 31a of the flexible printed circuit board 3l is also soldered 36 to a pair of terminals 35 of the connector 32, which is inserted into a pair of terminals 44. etc. However, these soldering 34
, 36 can be preliminarily cleaned with alcohol in a single cleaning process together with the soldered parts of a plurality of circuit components (not shown) to be soldered to the circuit board 4l.
The cause of gas generated from the soldering fluids 34 and 36 can be eliminated. Furthermore, these soldering steps 34 and 36 are performed in the half-uI bonding process of a plurality of circuit components to the circuit w board 4l, and from the assembly process of the electromagnetic means 15, these half- , 36
It is possible to omit the work of half-F attaching the parts and the work of cleaning these half-II attachments 34 and 36 with alcohol.

Further, during the assembly work of the electromagnetic means 15, the flexible printed circuit board 31 and the connector 32 are sufficiently separated to a position where they do not interfere with the work, and after the electromagnetic means 15 is assembled, the connector 32 is inserted into the pair of terminals 44. be.

In this head arm locking device, as described above, the outer circumferences of both coils l4 of the electromagnetic stage l5 are supported by the elastic body 2l, and the entire electromagnetic means 15 is mounted on the tip of the mounting plate 10 by the elastic body 21. It is supported by

Therefore, as shown in FIG. 5, the head arm 3 is
When the movable iron core 16 collides with the ends of both fixed iron cores 12 due to runaway in the direction, the impact can be buffered by the elastic body 2l. It is possible to prevent the heel 5 and the heart disk 8 from being accidentally injured when the heel 5 supported by the heel 5 collides with the heart disk 8 unexpectedly.

In addition, due to the self-aligning action caused by the deformation of the elastic body 21 when the movable iron core 16 collides with the tips of both fixed iron cores l2, as shown in FIGS. It is possible to automatically adjust the mutual parallelism between the adsorbed iron core 16 and the mutual parallelism of 12a and 16a.

Therefore, the adsorption surface 12 between both fixed iron cores 12 and movable iron core l6
A, 16a mutual parallelism can always be accurately ensured, the adhesion between both fixed iron cores 12 and movable iron core 16 is improved, and movable iron core 16 can be magnetolyzed to both movable iron cores 12 to 13.
It can be strongly attracted by the very small magnetic force of , and the hesode arm 3 can always be strongly and reliably locked at the innermost circumferential position ID, for example.

As a result, it is possible to prevent the head arm 3 from being unexpectedly unlocked due to shocks, vibrations, etc. during transportation, etc., and causing the head arm 3 to run out of control in the directions of arrows a and a'.

In addition, as shown in FIGS. 1 to 3, by supporting the outer periphery of the electromagnetic stage 15 by the elastic body 2l, the attraction force F of the movable iron core 16 is received on the center P of both fixed iron cores 12. be able to.

Therefore, due to the impact when the movable iron core l6 collides with the tips of both fixed iron cores 12, the arrow C in FIG.
No moment in direction or the like is generated at all, and the mutual parallelism of the attraction surfaces 12a and 16a of both fixed iron cores 12 and movable iron core 16 can always be accurately ensured.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various effective changes can be made based on the technical idea of the present invention.

For example, in the above embodiment, the head arm 3 is locked at the innermost circumferential position ID of the hard disk 8 by the electromagnetic stage 15, and the head arm strike bar 18 is provided to regulate the outermost circumferential position of the head arm 3, but this is reversed. It may be configured as follows.

Further, the present invention is not limited to the head arm lock device of a hard disk drive, but can be applied to a head arm lock device of various types of disk drives.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

! After assembling the magnetic means, the connector at the tip of the flexible printed circuit board pulled out from the circuit board can be inserted into the terminal of the coil of the electromagnetic means, thereby eliminating the need for soldering work such as lead wires from the assembly process of the electromagnetic means. This not only reduces the number of man-hours required to assemble the electromagnetic means, but also eliminates the need for flexible printed circuit boards and connectors to get in the way during the assembly of the electromagnetic T-stage, improving assembly work efficiency. . Also, '4'. Since failure factors such as failures can be eliminated, the reliability of the electrical connection between the terminals of the coil and the circuit board can also be improved.

The parts where the flexi-print base material and the inkter are attached are cleaned in the same cleaning process along with the half-day-old parts of the multiple circuit components that are to be inspected on the circuit board. You can wash it with alcohol beforehand, so ゛1'. (2) It is possible to eliminate the cause of gases generated from the soldering parts and glue, and also to reduce the number of accidents caused by alcohol cleaning of the soldered parts when the disc device is not in use.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a sectional view showing the main parts, and Figure 2 is a sectional view taken in the direction of arrows 1 and 2 of Figure 1. , FIG. 3 is a sectional view taken along the arrow [1-Ill] of FIG. 1, FIG. 4 is an exploded perspective view of the main parts, and FIG. 5 is a plan view of the whole. FIG. 6 is a plan view showing a conventional example. In addition, in the symbols used in the drawings, 2 arm shaft 3 - 1-to-7 door arm 5 - head 7 - voice coil motor (drive means) 8 - -
Hard disk (disc-shaped recording medium) 12 - Fixed iron core 14 Coil 15 - Electromagnetic means 16 - Movable iron core 3l - Flexible print 1 substrate 32 -
Connector 41 --- 1.1 circuit board 44 --- 1 terminal ID --- Innermost circumference position 0D This is the outermost circumference position. Agent Masaru Tsuchiya Figure 4

Claims (1)

[Scope of Claims] A head arm that has a head for recording and/or reproducing a disk-shaped recording medium and is driven to swing around an arm axis by a driving means, and a fixed iron core having a magnetic pole formed at its tip. , and an electromagnetic means consisting of a coil wound around the outer periphery of the fixed iron core, and the movable iron core attached to the head arm is attracted to the magnetic pole at the tip of the fixed iron core. The arm is configured to be locked at the innermost circumferential position or the outermost circumferential position of the disk-shaped recording medium, and the magnetic pole at the tip of the fixed iron core is reversed by energizing the coil, thereby releasing the lock of the head arm. In the head arm locking device for a disk device, the connecting means between the terminal of the coil of the electromagnetic means and a predetermined circuit board is connected to a flexible printed circuit board pulled out from the circuit board and the flexible printed circuit board. and a connector attached to the tip of the coil and inserted into the terminal of the coil.