JPH0241668U

JPH0241668U -

Info

Publication number: JPH0241668U
Application number: JP11687088U
Authority: JP
Priority date: 1988-09-07
Filing date: 1988-09-07
Publication date: 1990-03-22

Description

[Brief explanation of the drawing]

第１図から第５図は本考案の一実施例が示され
、第１図は小型モータのブラシ機構の平面図、第
２図はブラシ機構の要部断面側面図、第３図は小
型モータの断面側面図、第４図はロータの下側か
ら見た平面図、第５図から第１０図は従来例で、
第５図はコアレス・ブラシ付小型モータのブラシ
とマグネツトを示す平面図、第６図は同断面側面
図、第７図は同ブラシとターミナルの側面図、第
８図はコア付ブラシ付小型モータの断面側面図、
第９図は同ブラシとターミナルの側面図、第１０
図は第９図のブラシとターミナルの変形例側面図
である。１……ブラシ、１ａ……ブラシ接点部、１ｂ…
…ブラシばね部、１ｃ……ターミナル部、２……
ステータ基板、４……マグネツト、ｈ_１……ブラ
シばね部の軸方向の寸法、ｈ_２……ブラシ接点部
の軸方向寸法、ｄ_１……ブラシ接点部の板厚、ｄ
_２……ブラシばね部の板厚、ｄ_３……マグネツト
の厚み、５……コイル、６……ロータ、７……整
流子。 1 to 5 show an embodiment of the present invention, in which FIG. 1 is a plan view of a brush mechanism of a small motor, FIG. 2 is a sectional side view of essential parts of the brush mechanism, and FIG. FIG. 4 is a plan view of the rotor seen from below, and FIGS. 5 to 10 are conventional examples.
Figure 5 is a plan view showing the brush and magnet of a small coreless brush motor, Figure 6 is a sectional side view of the same, Figure 7 is a side view of the same brush and terminal, and Figure 8 is a small coreless brush motor. cross-sectional side view of
Figure 9 is a side view of the same brush and terminal, Figure 10
The figure is a side view of a modification of the brush and terminal of FIG. 9. 1...Brush, 1a...Brush contact portion, 1b...
...Brush spring part, 1c...Terminal part, 2...
Stator board, 4...Magnet, _h1 ...Axial dimension of brush spring part, _h2 ...Axis dimension of brush contact part, _d1 ...Plate thickness of brush contact part, d
₂ ... Thickness of brush spring portion, d ₃ ... Thickness of magnet, 5... Coil, 6... Rotor, 7... Commutator.

Claims

[Claims for Utility Model Registration] 1. A commutator fixed to a rotor, a plurality of coils fixed to the rotor, and a flat plate divided into each magnetic pole and fixed to the stator facing the coils. A magnet and a terminal part that is in sliding contact with the commutator and is disposed in a gap between the divided magnets on the stator, and that is bent in a direction perpendicular to the contact part, a spring part, and the spring part are integrated. In a small motor equipped with formed brushes,
A brush mechanism for a small motor, wherein the axial dimension of at least the section of the brush spring section sandwiched between the magnets is shorter than the axial dimension of the brush contact section and less than the thickness of the magnet. 2. The brush mechanism for a small motor according to claim 1, wherein the plate thickness of the contact portion of the brush is thicker than the plate thickness of the spring portion. 3. A brush mechanism for a small motor according to claim 1, wherein said brush is made of a copper alloy material, and a contact surface is coated with a noble metal material.