Motor and brush housing part

Patent metadata

Field	Value
Publication number	US-2022014070-A1
Application number	US-201917294784-A
Country	US
Kind code	A1
Filing date	Nov 12, 2019
Priority date	Nov 22, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

A motor includes a commutator, a brush, a first spring, a second spring, and a holder. The brush is configured to come into contact with the commutator to be electrically connected to the commutator. The first spring is configured to push the brush along the first direction toward the commutator. The second spring pushes the brush along a second direction intersecting the first direction. The holder is disposed such that the brush is located between the holder and the second spring in the second direction. The holder holds the brush between the holder and the second spring.

First claim

1 . A motor, comprising:
a commutator; a brush configured to come into contact with the commutator to be electrically connected to the commutator; a first spring configured to push the brush along a first direction toward the commutator; a second spring configured to push the brush along a second direction intersecting the first direction; and a holder disposed such that the brush is located between the holder and the second spring in the second direction, the holder being configured to hold the brush between the holder and the second spring.

2 . A motor of claim 1 , wherein
the first spring is a helical torsion spring.

3 . The motor of claim 1 , wherein
the first spring has:
a first end which comes into contact with the brush and
a second end at an opposite side from the first end, and
at least part of a trajectory of the first end extends beyond a center location of the brush in a direction along the second direction when viewed from the second end.

4 . The motor of claim 1 , further comprising: a guide section including the holder and defining at least part of a travel pathway of the brush in the first direction, wherein
the second spring is integrated with the guide section.

5 . The motor of claim 1 , wherein
the second spring is a leaf spring, and the second spring has a part which comes into contact with the brush and which has a thickness direction along the second direction.

6 . The motor of claim 5 , wherein
the second spring has a catch on which the first spring is to be hooked, and the second spring is configured to push the brush along the second direction while the second spring receives resilient force from the first spring.

7 . The motor of claim 6 , wherein
the first spring is out of contact with the brush and the second spring is in contact with the brush when the first spring is hooked on the catch.

8 . The motor of claim 6 , further comprising a brush housing part housing the brush, wherein
the first spring has:
a first end which comes into contact with the brush and
a second end at an opposite side from the first end,
the brush housing part has an opening section through which the first end passes from an exterior to an interior of the brush housing part, and the opening section and the catch are aligned in a direction intersecting a plane including a trajectory of the first end.

9 . The motor of claim 1 , further comprising a brush housing part housing the brush, wherein
the first spring has
a first end which comes into contact with the brush and
a second end at an opposite side from the first end,
the brush housing part has an opening section through which the first end passes from an exterior to an interior of the brush housing part, and the brush housing part has an inner wall having a groove formed along a trajectory of the first end.

10 . A brush housing part applicable to a motor including a brush and a first spring having a part configured to move along a first direction while generating a prescribed trajectory and push the brush,
the brush housing part housing the brush, the brush housing part having a groove through which the part passes in the course of moving of the part along the prescribed trajectory.

11 . The motor of claim 7 , further comprising a brush housing part housing the brush, wherein
the first spring has:
a first end which comes into contact with the brush and
a second end at an opposite side from the first end,
the brush housing part has an opening section through which the first end passes from an exterior to an interior of the brush housing part, and the opening section and the catch are aligned in a direction intersecting a plane including a trajectory of the first end.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Asano Takahiro
• Mizukami Hirofumi
• Uchida Yasuharu

Classifications

• H01R39/40

  enabling brush movement within holder during current collection · CPC title

• H01R39/381

  characterised by the application of pressure to brush · CPC title

• H02K13/10

  Arrangements of brushes or commutators specially adapted for improving commutation · CPC title

• H02K5/148 Primary

  Slidably supported brushes · CPC title

• H02K1/2789

  the rotor consisting of two or more circumferentially positioned magnets · CPC title