JPH1118385A - Brushless motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the dimension of a printed-circuit board for a brushless motor which is used for an OA apparatus such as a P.P.C., printer or the like. SOLUTION: Lead wires 6 of a DIP integrated-circuit component 5 are inserted from positions which stride over a magnet 2 at a rotor 1 from the rear side of a printed-circuit board 2 which is faced with the magnet 2 which is brought into pressure contact with, and fixed to, the rotor 1. The integrated- circuit component 5 is mounted on, and fixed to, the rear side, which is not faced with the rotor 1, of the printed-circuit board 3. Thereby, the rotation of the rotor 1 is not obstructed, and it is possible to obtain a brushless motor in which the dimension of the printed-circuit board 3 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a brushless motor capable of miniaturizing a printed circuit board on which a dip type integrated circuit component is mounted.

[0002]

2. Description of the Related Art An example of a conventional brushless motor will be described.
As shown in FIG. As shown in FIG. 2, the dip-type integrated circuit component 21 is mounted on the printed circuit board 23 at a position facing the rotor 2 so as not to hinder the rotation of the rotor 22. I was

As a mounting means for such a dip-type integrated circuit component, for example, one disclosed in Japanese Utility Model Laid-Open No. 7-20073 is known.

[0004]

However, in the configuration of the above-mentioned conventional example, the dip type integrated circuit component 1 is mounted and fixed at a position on the printed circuit board 3 where the rotation of the rotor 3 is not hindered. The dimensions were enlarged.

An object of the present invention is to solve such a conventional problem, and to improve the performance of a small-sized brushless motor.

[0006]

In order to solve the above-mentioned problems, a brushless motor according to the present invention is configured such that a lead wire of an integrated circuit component is connected to a magnet from the back side of a printed circuit board facing a magnet pressed and fixed to the rotor. By inserting the integrated circuit component on the back side of the printed circuit board that does not face the rotor, the integrated circuit component can be printed without obstructing the rotation of the rotor by inserting the integrated circuit component from a position straddling the magnet pressed and fixed to the printed circuit board. Since it is provided on the substrate, the enlargement of the dimensions of the printed circuit board can be prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be carried out in the form described in the claims, and leads of integrated circuit components from the back surface of the printed circuit board facing the magnet pressed and fixed to the rotor as described in the claim 1. The wire can be inserted from a position straddling the magnet pressed and fixed to the rotor, and the integrated circuit component can be mounted and fixed on the back side of the printed circuit board not facing the rotor.

The lead wire of the integrated circuit component is inserted from the back side of the printed circuit board facing the magnet pressed and fixed to the rotor from a position across the magnet of the rotor,
By mounting and fixing the integrated circuit component on the back side of the printed circuit board that does not face the rotor, the integrated circuit component can reduce the size of the printed circuit board without obstructing rotation of the rotor.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, a brushless motor includes a magnet 2 pressed and fixed to a rotor 1 and a printed circuit board 3.
And a magnet having a housing 4 and a lead wire 6 of a dip-type integrated circuit component 5 pressed and fixed to the rotor 1 from the back surface of the printed circuit board 3 facing the magnet 2 pressed and fixed to the rotor 1. The dip type integrated circuit component 5 is provided on the back side of the printed circuit board 3 that does not face the rotor 1.

In the brushless motor configured as described above, the dip-type integrated circuit component 5 can be mounted and fixed on the printed circuit board 3 without obstructing the rotation of the rotor 1.

[0012]

As is apparent from the above description, according to the present invention, the lead wire of the integrated circuit component is inserted from the back side of the printed circuit board facing the magnet of the rotor from the position where the lead wire straddles the magnet of the rotor. By mounting and fixing the components on the back side of the printed circuit board that does not face the rotor, the integrated circuit component does not hinder the rotation of the rotor, and has an advantageous effect that the dimensions of the printed circuit board can be easily reduced.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a brushless motor according to a first embodiment of the present invention.

FIG. 2 is a half sectional view of a conventional brushless motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 2 Magnet 3 Printed circuit board 4 Housing 5 Integrated circuit component 6 Lead wire

Claims (1)

[Claims] 1. A brushless motor having a stator fixed to a housing, a magnet pressed and fixed to a rotor, and a printed circuit board on which an integrated circuit component is mounted and fixed, facing a magnet pressed and fixed to the rotor. The lead wire of the integrated circuit component is inserted from the back side of the printed circuit board from a position that straddles a magnet that does not hinder the rotation of the rotor, and the integrated circuit component is mounted and fixed on the back side of the printed circuit board that does not face the rotor. A brushless motor.