JPH081849B2 - Method for manufacturing lock member with magnet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a lock member with a magnet in a small precision instrument such as a hard magnetic disk device.

[0002]

BACKGROUND OF THE INVENTION In a hard magnetic disk drive, a movable arm 100 is driven by a drive unit 102 as shown in FIG. 5, and a magnetic head 104 at the tip of the arm 100 is placed on the surface of a magnetic disk 106. The information is read or written by moving along.

In this hard magnetic disk device,
It is necessary to lock the arm 100 at a fixed position when the apparatus is stopped. As a means for that, the contacted portion 108 is provided on the movable side that moves integrally with the arm 100, and the iron piece 110 is attached thereto. On the other hand, the lock member 112 is used to fix the position.
And the abutted portion 108 is attached to the lock member 11
The lock member 11 is brought into contact with the positioning member 2 for positioning.
It is considered that the iron piece 110 is attracted by the magnet 120 attached to the second magnet 2, and thus the arm 100 is locked in position.

FIG. 6 shows a specific structure of the lock member 112. In the figure, reference numeral 114 denotes a main body made of a soft material, and a mounting hole 116 penetrating therethrough is provided at a predetermined position,
The mounting holes 116 are mounted on the magnetic disk device with screws or the like.

A mounting hole 118 is formed at the front end side of the main body 114 of the lock member 112, and a columnar magnet 120 is inserted and held therein.

In the case of this locking member 112, the movable portion to be contacted 108 is brought into contact with the contact surface 115 of the main body 114 made of a soft material to absorb the impact at the time of contact, and thereafter. The arm 100 locks the arm 100 in position by the attraction force of the iron piece 110 by the magnet 120.

When the apparatus is activated, the abutted portion 108 overcomes the attraction force of the magnet 120 and is disengaged from it by the forced drive of the voice coil motor of the drive portion 102.

[0008]

When the lock member 112 is manufactured, the main body 114 is usually molded and the magnet 120 magnetized in advance is inserted into the mounting hole 118 of the main body 114 and assembled. However, in this case, there is a problem that the direction of the magnet 120 is wrongly assembled in the N and S reverse directions.

In addition, the magnets 120 before assembling may stick to each other in a dumpling shape, and in this case, it is difficult to assemble the magnets 120 into the main body 114 by separating them.

Further, contact between the magnets 120 causes chipping of the magnets 120, and magnetic particles such as magnetic powder or iron powder in the vicinity generated at that time adhere to the magnets 120 to cause contamination. .

Thus, such contaminants are generated by the magnet 12
When the lock member 112 is attached to 0, when the lock member 112 is attached to the hard magnetic disk device, the magnetic particles scatter toward the magnetic disk 106 due to the impact of the lock member 112 when the stopper acts, and the magnetic particle is written on the disk 106. There is a problem that information is erased.

Further, when the lock member 112 is manufactured by such a method, it is necessary to align the directions of the magnet members during magnetization, separate the magnet 120 after magnetization, and other troublesome work. This becomes a factor that hinders the productivity of 112.

[0013]

The present invention has been made to solve such a problem, and its gist is to attach a magnet to a main body and to attach the magnet to the movable body on the other side by the attraction force of the magnet. A method of manufacturing a lock member for attracting a magnetic part provided to lock the movable body, wherein an unmagnetized magnet member is assembled to the main body, and the assembled product has a plurality of holding recesses. Further, the shape of the holding recesses is set in the respective holding recesses of the package member formed so that the magnet members of the assembling parts are oriented in the same or substantially the same direction, and then the respective assembling sets. The product is sealed
In addition, the package member is set in a magnetizing device to magnetize each magnet member.

[0014]

As described above, according to the present invention, the magnet member is not assembled to the main body after being magnetized, but is assembled to the main body in a state before being magnetized. It is designed to be magnetized by a magnetizing device.

As a means for aligning the directions of these magnets, a package member used for packing and shipping is used, and the holding recess of the package member is formed so that the magnets face the same direction. The package is set in a magnetizing device to magnetize the magnet.

According to the method of the present invention, the magnet is prevented from being installed in the main body in the opposite direction, and at the time of installing the magnet in the main body, the work for determining the direction is not required.

Further, since the magnets are completely separated from each other after being magnetized and there is no opportunity to make contact with each other, they do not cause chipping due to their contact, and due to mutual attraction force, they solidify into a dumpling shape. It doesn't get lost.

Further, since each magnet is magnetized in a sealed state in a sealed state, iron powder or the like does not directly adhere to the magnet, and the magnet-body assembly, that is, the lock member is, for example, a magnetic disk. When it is attached to the device, the accident that the attached magnetic powder is scattered on the disk and erases the information does not occur.

As described above, according to the present invention, it is possible to solve the problem that occurs when assembling a magnet that has been previously magnetized into the main body, and as a result, it is possible to simplify the assembly of the lock member and increase the productivity. can get.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. In FIG. 2, reference numeral 10 denotes a lock member for a hard magnetic disk device, which has a main body 12 made of a soft material such as resin or rubber.

Mounting holes 14 and 16 are provided in the main body 12, and the mounting holes 14 and 16 are attached to the magnetic disk device by a predetermined fixture. In this example, one mounting hole 14 has a round shape and the other mounting hole 16 has a long hole shape.

The lock member 10 has a head portion 18, and a contact surface 20 serving as a stopper acting surface is provided on the head portion 18.
Are formed.

A mounting hole 22 with a bottom is formed in the head portion 18, and a cylindrical magnet 24 is inserted therein.
Is held.

In FIG. 3, reference numeral 26 is a tray as a package member, which has a plurality of holding recesses 28.
Each holding recess 28 has a shape corresponding to the shape of the lock member 10, and strictly speaking, the magnets 24 of each lock member 10 have the same or substantially the same axial center of the magnet member 24a (FIG. 1) before being magnetized. Aligned so that they face the same direction.

FIG. 1 shows each step of a method of manufacturing a lock member 10 according to one embodiment of the present invention. As shown in the figure, in the method of this embodiment, first, a magnet member 24a before magnetization is formed.
The main body 12 and the tray 26 are individually immersed in the liquids in the cleaning tanks 30, 32 and 34 to clean them.

After the cleaning process is completed, the magnet member 24a and the main body 12 are assembled in the clean room.
That is, the magnet member 24a is inserted and held in the mounting hole 22 of the main body 12.

When the assembly is carried out in this way, the assembled product is also trained in the clean room.
Set inside the holding recesses 28, and then the seal member 3
6. Seal each assembly by 6 in a sealed state.

After the above steps are completed, as shown in FIG. 4, a large number of the assembled parts together with the tray 26 are magnetized by the magnetizing device 3.
Set to 8 and magnetize.

In the method of this example, since the magnet member 24a before magnetizing is assembled to the main body 12, the assembling property at that time is good, and after magnetizing, the magnets 24 contact each other. Because there is no opportunity, each magnet 2
4 does not cause a problem of damage due to contact of No. 4 and a problem that the generated magnetic powder or peripheral magnetic powder adheres to the magnet 24.

Further, since the tray 26 is shaped so that the held assembly parts are aligned in a certain direction, each tray 26 is set in the magnetizing device 38 to be magnetized. The assembled magnet member 24a can be magnetized in the same direction.

Further, since each assembly is sealed in a sealed state when magnetized, even if iron powder or the like adheres to the surface (the surface of the seal member 36), it can be easily cleaned by cleaning. Can be removed.

Although the embodiment of the present invention has been described in detail above, this is merely an example. The present invention can be applied to lock members of other forms, and it is also possible to use packages other than the above examples as package members.

Further, the present invention is generally applicable to the manufacture of a member with a magnet other than the above-mentioned lock member, and is carried out in a mode in which various modifications are made based on the knowledge of those skilled in the art without departing from the spirit of the invention. It is possible.

[Brief description of drawings]

FIG. 1 is a process explanatory view of a lock member manufacturing method according to an embodiment of the present invention.

FIG. 2 is a perspective view of a lock member to which the method is applied.

FIG. 3 is a perspective view of the tray shown in FIG.

FIG. 4 is a diagram showing a magnetizing method in the magnetizing device of FIG. 1.

FIG. 5 is a view showing a state in which a lock member is attached to the hard magnetic disk device.

FIG. 6 is an explanatory diagram for explaining the background of the present invention.

[Explanation of symbols]

 10 Lock member 12 Main body 24 Magnet 24a Magnet member 26 Tray 28 Holding recess 38 Magnetizing device

Claims (1)

[Claims] 1. A method of manufacturing a lock member, wherein a magnet is attached to a main body, and a magnetic portion provided on a movable body on the other side is attracted by the attraction force of the magnet to lock the movable body, which is not attached to the main body. Having assembled a magnetic magnet member, the assembled product has a plurality of holding recesses, and the shapes of the holding recesses are such that the magnet members of the assembled products face the same or substantially the same direction. Set in each holding recess of the formed package member, then seal each assembly that has been set in a sealed state, and then set the package member in the magnetizing device for each magnet A method for manufacturing a lock member, which comprises magnetizing the member.