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Mounting Structure of Magnetic Member, Bonding Method of Magnetic Member and Magnetic Connection Member, Pickup Apparatus, and Disc Apparatus

a technology of mounting structure and magnetic member, which is applied in the direction of magnetic bodies, paper/cardboard containers, instruments, etc., can solve the problems that the adhesion may not improve, and the uv-curing adhesive cannot be applied to the magn

Inactive Publication Date: 2010-12-16
ACUSHNET CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0032]A mounting structure of a magnetic member according to an embodiment of the present invention at least includes a magnetic member and a magnetic coupling member provided with an adhesion securing portion configured to secure adhesive strength when bonded to the magnetic member.
[0032]A mounting structure of a magnetic member according to an embodiment of the present invention at least includes a magnetic member and a magnetic coupling member provided with an adhesion securing portion configured to secure adhesive strength when bonded to the magnetic member.
[0032]A mounting structure of a magnetic member according to an embodiment of the present invention at least includes a magnetic member and a magnetic coupling member provided with an adhesion securing portion configured to secure adhesive strength when bonded to the magnetic member.
[0067]According to a configuration described above, the magnetic member is securely bonded to the magnetic coupling member. Before the magnetic member is mounted onto the magnetic coupling member or after the magnetic member has been mounted onto the magnetic coupling member, the adhesive member applied to either one or both of the adhesive member reservoir portion of the magnetic member and the adhesive member reservoir portion of the magnetic coupling member is easily spread through the dent portion whose depth is greater than 0 mm and smaller than or equal to substantially 0.2 mm that make up the adhesive member reservoir portion of the magnetic member or through the dent portion whose depth is greater than 0 mm and smaller than or equal to substantially 0.2 mm that make up the adhesive member reservoir portion of the magnetic coupling member due to the capillarity, etc., and thus, secure bonding is realized. If the dent portion provided on either one or both of the adhesive member reservoir portion of the magnetic member and the adhesive member reservoir portion of the magnetic coupling member are 0 mm in depth, for example, there is a fear that the capillarity, etc., hardly occurs. If the dent portion formed on either one or both of the adhesive member reservoir portion of the magnetic member and the adhesive member reservoir portion of the magnetic coupling member are greater than 0.2 mm in depth, for example, there is a fear that the occurrence of the capillarity, etc., becomes difficult. When either one or both of the adhesive member reservoir portion of the magnetic member and the adhesive member reservoir portion of the magnetic coupling member include the dent portion whose depth is greater than 0 mm and smaller than or equal to substantially 0.2 mm, the adhesive member applied to the adhesive member reservoir portion is easily spread, from the adhesive member reservoir portion as a starting point, on the adhesion securing portion due to the capillarity, etc. Hence the adhesive strength of the magnetic member to the magnetic coupling member is secured without fail.
[0034]A mounting structure of a magnetic member according to an embodiment of the present invention at least includes a magnetic member, a magnetic coupling member mounted with the magnetic member, an adhesive member bonding the magnetic member to the magnetic coupling member, either one or both of the magnetic member and the magnetic coupling member being provided with an adhesion securing portion configured to secure adhesive strength.
[0034]A mounting structure of a magnetic member according to an embodiment of the present invention at least includes a magnetic member, a magnetic coupling member mounted with the magnetic member, an adhesive member bonding the magnetic member to the magnetic coupling member, either one or both of the magnetic member and the magnetic coupling member being provided with an adhesion securing portion configured to secure adhesive strength.
[0070]A method of bonding a magnetic member and a magnetic coupling member according to an embodiment of the present invention includes forming an adhesion securing portion configured to secure adhesive strength on either one or both of the magnetic member and the magnetic coupling member, and bonding the magnetic member to the magnetic coupling member.
[0070]A method of bonding a magnetic member and a magnetic coupling member according to an embodiment of the present invention includes forming an adhesion securing portion configured to secure adhesive strength on either one or both of the magnetic member and the magnetic coupling member, and bonding the magnetic member to the magnetic coupling member.
[0070]A method of bonding a magnetic member and a magnetic coupling member according to an embodiment of the present invention includes forming an adhesion securing portion configured to secure adhesive strength on either one or both of the magnetic member and the magnetic coupling member, and bonding the magnetic member to the magnetic coupling member.
[0034]A mounting structure of a magnetic member according to an embodiment of the present invention at least includes a magnetic member, a magnetic coupling member mounted with the magnetic member, an adhesive member bonding the magnetic member to the magnetic coupling member, either one or both of the magnetic member and the magnetic coupling member being provided with an adhesion securing portion configured to secure adhesive strength.

Problems solved by technology

When an ordinary potting adhesive which is cured by UV light, etc., is used on a bonding portion, however, improvement in adhesion may not be expected.
This causes a problem that the UV-curing adhesive cannot be applied to the magnet 550 and the broad adhesive surface 511 of the back yoke 510.

Method used

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  • Mounting Structure of Magnetic Member, Bonding Method of Magnetic Member and Magnetic Connection Member, Pickup Apparatus, and Disc Apparatus
  • Mounting Structure of Magnetic Member, Bonding Method of Magnetic Member and Magnetic Connection Member, Pickup Apparatus, and Disc Apparatus
  • Mounting Structure of Magnetic Member, Bonding Method of Magnetic Member and Magnetic Connection Member, Pickup Apparatus, and Disc Apparatus

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first embodiment

[0083]FIGS. 1 to 5 illustrate a first embodiment of a mounting structure of a magnetic member, a method of bonding a magnetic member and a magnetic coupling member, a pickup unit, and a disc apparatus according to the present invention.

[0084]A magnetic coupling member 10I (FIGS. 1, 2A, 2B) and a magnetic member 50 (FIG. 2A) make up a fixed portion 7 of a driver 5 (FIG. 4). As illustrated in FIG. 4, coils (not shown) corresponding to an objective lens 250, a holding member 90, and the magnetic member 50 (FIG. 2A); a movable portion assembly 100 made up by mounting the objective lens 250, oils not shown, etc., to the holding member 90 (FIG. 4); and support members 80 for supporting the movable portion assembly 100 make up a movable portion 9 of the driver 5. The driver 5 for the objective lens 250 of the pickup unit 3 is configured, for example, as the actuator 5 including the fixed portion 7 and the movable portion 9.

[0085]As the pickup unit 3 illustrated in FIGS. 4 and 5, the optica...

second embodiment

[0209]FIG. 6 illustrates a second embodiment of a mounting structure of a magnetic member and a method of bonding a magnetic member and a magnetic coupling member according to the present invention.

[0210]In the mounting structure of the magnetic member 50 and the method of bonding the magnetic member 50 and the magnetic coupling member 10I according to a first embodiment in FIGS. 1, 2A, and 2B, the plurality of substantially grooves 14a, 14b, 15a, and 15b in a substantially lattice shape are formed on the mounting surfaces 11aI and 11bI of the side walls 10aI and 10bI making up the back yoke 10I, to provide the adhesion securing portions 12aI and 12bI having the plurality of substantially rectangular inclined lattice-shaped or substantially inclined strip-like uneven portions 13aI and 13bI.

[0211]Likewise, in the mounting structure of the magnetic member 50 and the method of bonding the magnetic member 50 and a magnetic coupling member 101I according to a second embodiment in FIG. 6,...

third embodiment

[0241]FIG. 7 illustrates a third embodiment of a mounting structure of a magnetic member and a method of bonding a magnetic member and a magnetic coupling member according to the present invention.

[0242]In the mounting structure of the magnetic member 50 and the method of bonding the magnetic member 50 and the magnetic coupling member 10I according to a first embodiment in FIGS. 1, 2A, and 2B, the plurality of grooves 14a, 14b, 15a, and 15b in a substantially lattice shape are formed on the mounting surfaces 11aI and 11bI of the side walls 10aI and 10bI making up the back yoke 10I, to provide the adhesion securing portions 12aI and 12bI having the plurality of substantially rectangular inclined lattice-shaped or substantially inclined strip-like uneven portions 13aI and 13bI. In the mounting structure of the magnetic member 50 and the method of bonding the magnetic member 50 and the magnetic coupling member 20 according to a third embodiment in FIG. 7, a plurality of grooves 24a, 24...

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Abstract

A mounting structure of a magnetic member at least comprising: a magnetic member; and a magnetic coupling member provided with an adhesion securing portion configured to secure adhesive strength when bonded to the magnetic member.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of priority to Japanese Patent Application Nos. 2009-139778 and 2009-192004, filed Jun. 11, 2009 and Aug. 21, 2009, respectively, of which full contents are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a mounting structure of a magnetic member, a method of bonding the magnetic member and a magnetic coupling member, a pickup unit, and a disc apparatus.[0004]2. Description of the Related Art[0005]FIGS. 9A and 9B illustrate one embodiment of amounting structure of a magnetic member and a method of bonding a magnetic member and a magnetic coupling member.[0006]In an objective lens actuator for an optical pickup unit, high drive sensitivity is achieved by reducing the weight of a movable portion (not shown) of the actuator and increasing the volume of a magnet 550 disposed on a fixed portion 507 of the actuator to obtain lar...

Claims

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Application Information

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IPC IPC(8): H01F7/00B32B37/00
CPCG11B7/08582G11B7/0935G11B7/22Y10T156/10
Inventor MORIMOTO, SHUNICHIIMAI, KENICHI
Owner ACUSHNET CO