JPH11164525A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a commutator and a brush, and prevent noise. SOLUTION: Arc-shaped holding members 3, 3 are protruded toward the terminal 2b, 2c side adjacent to the respective terminals 2a, 2b, 2c of a commutator 1. The holding members 3, 3 of the adjacent terminals 2a, 2b hold noise preventing members 4 electrically and mechanically. Thereby arcs between the terminals is restrained from being generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor provided with a commutator, and more particularly, to protecting a commutator and a brush and preventing noise, and a configuration for that purpose, which becomes a resistance in rotation of the motor. It relates to a technique to be suppressed.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, in a motor provided with a commutator 1, a segment 5 of the commutator 1 on a rotor 9 slides on a brush 10 on a fixed side and rotates. When the direction of the current is switched, an arc is generated between the adjacent segments 5 and 5. If there is no element that absorbs the arc, the brush 10 and the segment 5 are electrically worn, and the life of the motor 5 is reduced. There has been a problem in that the device is short, and an electric wave is obstructed by an arc, thereby giving noise to various devices. In FIG. 3, 13 is a motor terminal, 14 is a rotating shaft,
15 is a bearing, 16 is a rotor core, 17 is a magnet, 1
8 is a case, 19 is a rotor coil, 20 and 21 are bearing stands, and 22 is a bush.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem. It is an object of the present invention to suppress generation of an arc to protect a commutator and a brush and to prevent noise. It is another object of the present invention to provide a motor whose configuration does not cause resistance in rotation of the motor.

[0004]

According to the first aspect of the present invention, the terminals 2b, 2b, 2c and 2c of the commutator 1 are adjacent to each other.
Each of the arc-shaped holders 3 extends toward the side 2c, and the noise prevention member 4 is electrically and mechanically held by the holders 3 of the adjacent terminals 2a and 2b. Things.

According to the second aspect, a fixing ring 6 for fixing the segments 5 of the commutator 1 is formed by a printed wiring board 7, and the conductive portions 8 a and 8 b electrically connected to the segments 5 on the printed wiring board 7. , 8c, and each conductive portion 8
The noise prevention member 4 is provided between the a, 8b, and 8c so as to be electrically conductive, and is mechanically fixed to the printed wiring board 7.

(Function) In the first aspect, the terminals 2a,
The noise prevention member 4 provided between the holders 3 and 3 extending from the terminals 2a and 2b suppresses the occurrence of an arc between the terminals 2a, 2b and 2c, and prevents noise from being generated. , 2b, 2c from adjacent terminals 2b, 2b.
c, the holders 3, 3 are extended in an arc shape toward the terminal 2a,
2b, 2c and the holders 3 can be arranged on substantially the same plane. Thus, by arranging the terminals 2a, 2b, 2c and the holders 3 on the same plane, the rotation of the rotor can be reduced. In the case where a thin type such as the chip capacitor 4a is used without any hindrance, the hindrance of the rotation of the rotor can be similarly reduced.

In the second aspect, each terminal 2a, 2b,
2c is electrically connected to each conductive portion 8a, 8b, 8c of the printed wiring board 7, and an arc is generated between the terminals 2a, 2b, 2c by the noise prevention member 4 provided between the adjacent conductive portions 8b, 8c. In addition, the printed wiring board 7 also serves as a fixing ring 6 for fixing the segment 5 while suppressing noise and preventing noise. , 8b,
Since the noise prevention member 4 is provided between the adjacent conductive portions 8a and 8b of the noise prevention member 8c, it is possible to use a thin noise prevention member 4 such as a chip capacitor 4a.
When using a thin type such as the chip capacitor 4a, it is possible to reduce the hindrance of the rotation of the rotor.

[0008]

[First Embodiment] FIG. 1A is a sectional view of a commutator 1 and FIG. 1B is a front view. Since the overall configuration of the motor is basically the same as that of the conventional example shown in FIG. The segments 5, 5, and 5 are held together with the fixing ring 6 on an insulating base 23 inserted and fixed to the rotating shaft 14 of the motor. Each terminal 2 a, 2 b, 2 c is formed by bending the segment 5, and each terminal 2 a, 2 b, 2 c is arranged on the same plane orthogonal to the axis of the rotating shaft 14. Each terminal 2a, 2b, 2c has
Arc-shaped holders 3 and 3 are directed toward adjacent terminals 2b and 2c.
Are each extending. Holder 3 has terminals 2a, 2b, 2c
And are arranged on the same plane. That is,
The terminals 2a, 2b, 2c and the holders 3 are arranged on the same plane orthogonal to the axis of the rotating shaft 14,
So as not to hinder the rotation of

A chip capacitor 4a as a noise prevention member 4 is connected between the holders 3 and 3 of the adjacent terminals 2a and 2b by solder 24 and is electrically and mechanically held. In the present embodiment, the occurrence of an arc between the terminals 2a, 2b, 2c is suppressed by the noise prevention member 4 provided between the holders 3, 3 extending from the terminals 2a, 2b, 2c, thereby preventing noise. , And the terminals 2a, 2b, 2c and the holders 3 are arranged on the same plane orthogonal to the axis of the rotating shaft 14, so that the rotation of the rotor can be hindered. Not something. Moreover, the noise prevention member 4
Since a thin type such as the chip capacitor 4a is used, obstruction of the rotation of the rotor can be similarly reduced.

[Embodiment 2] FIG. 2A is a sectional view of a commutator 1 and FIG. 2B is a front view. However, the basic configuration of this embodiment is the same as that of the embodiment shown in FIG. 1, and the common parts are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the segment 5 of the commutator 1
Is formed by a printed wiring board 7. The printed wiring board 7 has conductive portions 8a, 8b, 8c electrically connected to the respective segments 5. A chip capacitor 4 a as a noise prevention member 4 is connected between the conductive portions 8 a, 8 b, and 8 c by solder 24 to be electrically conductively provided and mechanically fixed to the printed wiring board 7.

The printed wiring board 7 is inserted and positioned in the insulating base 23 and disposed on a plane orthogonal to the axis of the rotating shaft 14. In the present embodiment, the noise prevention member 4 suppresses the occurrence of an arc between the terminals 2a, 2b, and 2c, and the noise reduction can be performed. 7
Simplifies the configuration. Further, a thin chip capacitor 4a is provided between the conductive portions 8a, 8b adjacent to the conductive portions 8a, 8b, 8c formed on the printed wiring board 7.
Is used, so that hindering the rotation of the rotor can be reduced.

[0012]

According to the first aspect of the present invention, the arc-shaped holding members extend toward the terminals adjacent to the respective terminals of the commutator, and the noise prevention member is electrically and mechanically attached to the holding members of the adjacent terminals. Because it holds, by the noise prevention member provided between the holders extending from the terminals, it is possible to suppress the occurrence of arcs between the terminals and prevent noise, while each terminal is connected to the adjacent terminal. The holding body extends in an arc toward the terminal, and the terminal and the holding body can be arranged on substantially the same plane,
By arranging the terminal and the holding member on the same plane as described above, the rotation of the rotor is not hindered, and when a thin noise prevention member such as a chip capacitor is used, the same applies. In addition, it is possible to reduce obstruction of the rotation of the rotor.

According to a second aspect of the present invention, a fixing ring for fixing the commutator segments is formed by a printed wiring board, and a conductive portion electrically connected to each segment is formed on the printed wiring board. Since the noise prevention member is provided electrically conductive and is mechanically fixed to the printed wiring board, each terminal is electrically connected to each conductive part of the printed wiring board and provided between adjacent conductive parts. The noise prevention member suppresses the occurrence of an arc between the terminals and prevents noise, while the printed wiring board also serves as a fixing ring for fixing the segment, thereby simplifying the configuration. A noise prevention member is provided between adjacent conductive parts of each conductive part formed on the board, so it is possible to use a thin noise prevention member such as a chip capacitor, and to prevent noise. The wood when using those thin, such as a chip capacitor has the advantage of reducing the inhibiting rotation of the rotor.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, in which (a) is a cross-sectional view of a commutator and (b) is a front view.

FIGS. 2A and 2B show a second embodiment, wherein FIG. 2A is a cross-sectional view of a commutator, and FIG.

FIG. 3 is a partially sectional side view of a motor showing a conventional example.

FIG. 4 shows a conventional example, in which (a) is a sectional view of a commutator,
(B) is a front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commutator 2a terminal 2b terminal 2c terminal 3 Holder 4 Noise prevention member 5 Segment 6 Fixing ring 7 Printed wiring board 8a Conductive part 8b Conductive part 8c Conductive part

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[Procedure amendment]

[Submission date] November 16, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, in a motor provided with a commutator 1, a segment 5 of the commutator 1 on a rotor 9 slides on a brush 10 on a fixed side and rotates. When the direction of the current is switched, an arc is generated between the adjacent segments 5 and 5, and if there is no element that absorbs the arc, the brush 10 and the segment 5 are electrically worn, and the motor is damaged.
Shorter over other life also cause interference with the arc, there is a problem that gives noise to various devices.
In FIG. 3, 13 is a motor terminal, 14 is a rotating shaft, 15
Is a bearing, 16 is a rotor core, 17 is a magnet, 18 is a case, 19 is a rotor coil, 20, 21 are bearing stands, 2
2 is a bush.

Claims (2)

[Claims] An arc-shaped holding body extends toward a terminal adjacent to each terminal of a commutator, and a noise prevention member is electrically and mechanically held on the holding body of an adjacent terminal. Features motor. 2. A fixing ring for fixing a commutator segment is formed by a printed wiring board, a conductive portion electrically connected to each segment is formed on the printed wiring board, and a noise preventing member is provided between the conductive portions. A motor provided electrically conductively and mechanically fixed to a printed wiring board.