JP2004080922A - Flat motor and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat motor further made thinner than conventional flat motors. <P>SOLUTION: The flat motor 1 comprises a rotor 2 and a stator 5 that is arranged at a bearing housing 4 and rotatably supports the rotor 2 via a bearing 3. The stator 5 is constituted of a three-phase structure, composed of a wiring board 6 attached to the bearing housing 4, an adhesive layer 7 formed on the wiring board 6, and a conductive layer 8 that is directly applied with wiring on the wiring board 6 via the adhesive layer 7. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flat motor used for an AV device such as a video camera or a disc player, which is desired to be small and thin, an IT device such as a notebook personal computer, and an electronic device using the flat motor.
[0002]
[Prior art]
As shown in FIG. 4, the flat motor 101 generally includes a rotor section 102 and a stator section 105 that rotatably supports the rotor section 102 via a bearing 103 and a bearing housing 104.
[0003]
The rotor unit 102 includes a rotor magnet 102a magnetized to have multiple poles in the axial direction, a magnetic rotating yoke 102b to which the rotor magnet 102a is attached, and a shaft 102c provided at the center of the magnetic rotating yoke 102b. ing.
[0004]
As shown in the circle in FIG. 4, the stator section 105 has a configuration in which a coil 108 is mounted on a wiring board 106 via an adhesive layer 107. The wiring substrate 106 includes a substrate body 106a, an adhesive layer 106b, a conductor layer 106c, an insulating layer 106d, and the like.
[0005]
As the coil 108, for example, a motor coil disclosed in JP-A-2002-118995 is used. The motor coil disclosed in Japanese Patent Application Laid-Open No. 2002-118995 has a configuration in which a conductive wire 108c is laid on an insulating substrate 108a made of polyester or the like via an adhesive layer 108b as shown in an enlarged manner in a circle in FIG.
[0006]
[Problems to be solved by the invention]
By the way, the flat motor 101 using the conventional motor coil disclosed in JP-A-2002-118995 has the following problems.
(1) As described above, the stator section 105 is configured by laminating the coil 108 on the wiring board 106 via the adhesive layer 107. Since the multilayer structure has the adhesive layer 108b and the conductive wire 108c stacked, the thickness T1 of the stator portion 105 is increased.
(2) As shown in FIG. 5, after attaching the coil 108 to the wiring board 106 via the adhesive layer 107, the ends P, P of the conductors 108c, 108c. Since it must be soldered to Q, Q..., The assembly process becomes complicated.
(3) Since the conductive wires 108c are adhered to the insulating substrate 108a only by the adhesive force of the adhesive layer 108b, they are easily separated from the insulating substrate 108a.
[0007]
An object of the present invention is to solve the above-mentioned conventional problems and to provide a flat motor that can be made thinner than a flat motor using a motor coil disclosed in JP-A-2002-118995.
[0008]
Another object of the present invention is to provide a flat motor in which the processing of the end portion of the conductive wire is easy and the assembling process can be simplified, and the conductive wire is hard to peel off.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 is a flat motor including a rotor portion, and a stator portion rotatably supporting the rotor portion via a bearing and a bearing housing.
The rotor unit is composed of a rotor magnet magnetized to have multiple poles in the axial direction, a magnetic rotating yoke to which the rotor magnet is attached, and a shaft provided at a central portion of the magnetic rotating yoke.
The stator portion includes a wiring board attached to the bearing housing, an adhesive layer provided on the wiring board, and a conductor layer laid directly on the wiring board via the adhesive layer. By having a three-layer structure,
The conventional insulating substrate 108a was eliminated, and the thickness of the flat motor was reduced accordingly.
[0010]
According to a second aspect of the present invention, in the flat motor according to the first aspect,
By providing a reinforcing layer on the conductor layer,
The conductor layer was attached to the insulating substrate side with the reinforcing layer so that the conductor layer was not easily separated from the insulating substrate due to a synergistic effect with the adhesion by the adhesive layer.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a sectional view of the flat motor 1. The flat motor 1 includes a rotor section 2 and a stator section 5 that rotatably supports the rotor section 2 via a bearing 3 and a bearing housing 4.
[0012]
The rotor unit 2 includes a rotor magnet 2a magnetized to have multiple poles in the axial direction, a magnetic rotating yoke 2b to which the rotor magnet 2a is attached, and a shaft 2c provided at the center of the magnetic rotating yoke 2b. ing.
[0013]
The stator portion 5 includes a wiring board 6 attached to the bearing housing 4, an adhesive layer 7 provided on the wiring board 6, and a wiring directly on the wiring board 6 via the adhesive layer 7. The conductor layer 8 has a three-layer structure, and a reinforcing layer 9 is provided on the conductor layer 8. The stator portion 5 is formed with a thickness T2.
[0014]
The wiring board 6 includes a substrate body 6a made of iron, paper phenol, glass epoxy, or the like, an adhesive layer 6b made of epoxy, a conductor layer 6c made of copper, and an insulating layer (resist) 6d made of epoxy or the like. I have.
[0015]
The adhesive layer 7 is formed of epoxy or the like, similarly to the adhesive layer 6b of the wiring board 7.
[0016]
The conductor layer 8 is formed of an enamel-coated wire or the like.
[0017]
The reinforcing layer 9 is formed by potting a resin such as epoxy, or by attaching a film such as polyester or polyimide to the adhesive layer 7 so as to cover the conductor layer 8.
[0018]
As shown in FIG. 2, in the stator unit 5, a pair of coils constituting each phase of A-phase, B-phase, and C-phase are arranged to face each other. It is continuous.
[0019]
The stator portion 5 of the embodiment is configured as described above, and the conductor layer 8 is directly wired on the wiring board 6 via the adhesive layer 7. Since the component corresponding to the insulating substrate 108a is unnecessary, the stator portion 5 to the flat motor 1 can be made thinner accordingly.
[0020]
When the reinforcing layer 9 is provided, the number of layers of the stator portion 5 increases accordingly, and becomes the same as the number of layers of the conventional stator portion 105. However, the number of reinforcing layers 9 is larger than that of the conventional insulating substrate 108a. Is thinner, the thickness T2 of the stator portion 5 does not become larger than the thickness T1 of the conventional stator portion 105. (T2 ≦ T1).
[0021]
The reinforcing layer 9 prevents the conductor layer 8 from peeling off from the wiring board 6, thereby improving the reliability of the product.
[0022]
Further, as shown in FIG. 2, the end P of the coil as the conductor layer 8 can be started from the land Q of the wiring board 6. If the land portion Q is previously subjected to a soldering process by screen printing or the like, conduction can be easily obtained by a reflow process, so that it is not necessary to perform a soldering process or a conduction process manually as in the conventional case. Is greatly simplified.
[0023]
Further, as shown in FIG. 3, if a plurality of wiring boards 6 are arranged in a matrix and the solder printing, wiring, and reflow processes are performed continuously, automation can be facilitated, and manufacturing can be performed at lower cost. It becomes possible to do.
[0024]
The flat motor 1 is used by being incorporated in an electronic device such as an AV device such as a video camera or a disc player or an IT device such as a notebook personal computer.
[0025]
【The invention's effect】
The flat motor of the present invention has the following effects.
(1) In the flat motor according to the first aspect, since the coil is formed by the laid conductor layer directly on the wiring board via the adhesive layer, the flat motor is made thinner than a conventional motor using an insulating substrate. be able to. In addition, the coil can be easily soldered and conductive, and can be provided at low cost.
(2) In the flat motor according to the second aspect, since the reinforcing layer is provided on the conductor layer, the conductor layer is reinforced by the reinforcing layer, and a highly reliable product that does not easily peel off the conductor layer is provided. Can be provided.
(3) In the flat motor according to the third aspect, the reinforcing layer can be formed simply and easily by potting the resin.
(4) The electronic device of the fourth aspect uses the flat motor of the first aspect, so that the flat motor can be made thinner and smaller, so that the electronic device can be made thinner and smaller.
[Brief description of the drawings]
FIG. 1 is a sectional view of a flat motor according to the present invention.
FIG. 2 is a plan view of a stator portion of the flat motor according to the present invention.
FIG. 3 is an explanatory view showing an example of a method for manufacturing a flat motor according to the present invention.
FIG. 4 is a sectional view of a conventional flat motor.
FIG. 5 is a plan view of a stator portion of a conventional flat motor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Flat motor, 2 ... Rotor part, 2a ... Rotor magnet, 2b ... Magnetic rotating yoke, 2c ... Shaft, 3 ... Bearing, 4 ... Bearing housing, 5 ... Stator part, 6 ... Wiring board, 7 ... Adhesive layer, 8 ... conductor layer, 9 ... reinforcement layer.

Claims (4)

A rotor portion, and a stator portion rotatably supporting the rotor portion via a bearing and a bearing housing,
The rotor section includes a rotor magnet magnetized to have multiple poles in the axial direction, a magnetic rotating yoke to which the rotor magnet is attached, and a shaft provided at a central portion of the magnetic rotating yoke.
The stator portion includes a wiring board attached to the bearing housing, an adhesive layer provided on the wiring board, and a conductor layer laid directly on the wiring board via the adhesive layer. A flat motor having a three-layer structure. The flat motor according to claim 1, wherein a reinforcing layer is provided on the conductor layer. The flat motor according to claim 2, wherein the reinforcing layer is formed by potting of a resin. An electronic device having a flat motor,
The flat motor includes a rotor portion, and a stator portion rotatably supporting the rotor portion via a bearing and a bearing housing,
The rotor section includes a rotor magnet magnetized to have multiple poles in the axial direction, a magnetic rotating yoke to which the rotor magnet is attached, and a shaft provided at a central portion of the magnetic rotating yoke.
The stator portion includes a wiring board attached to the bearing housing, an adhesive layer provided on the wiring board, and a conductor layer laid directly on the wiring board via the adhesive layer. An electronic device having a three-layer structure.

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