Vibrating compact motor with attached flexible circuit board for a mobile device

Patent metadata

Field	Value
Publication number	US-9742240-B2
Application number	US-201314132530-A
Country	US
Kind code	B2
Filing date	Dec 18, 2013
Priority date	Dec 26, 2012
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A compact motor which avoids peeling and cracking of the circuit board wiring pattern upon bending the printed circuit board. A projecting part ( 13 ), projecting toward the bottom side of the bracket ( 5 ), is provided on the back surface ( 5 c ) of the bracket ( 5 ) of a compact motor. A board insertion groove (S) is formed between the projecting part ( 13 ) and the back surface ( 5 c ). The flexible printed circuit board ( 10 ), inserted inside the board insertion groove (S), abuts the projecting part ( 13 ) and is bent facing the back. When the printed circuit board ( 10 ) is inserted into the board insertion groove (S) and bent, the printed circuit board ( 10 ) is in a state abutting the curved part ( 13 a ) of the projecting part ( 13 ), so the curved part ( 13 a ) of the projecting part ( 13 ) regulates bending and, by doing this, stabilizes bending of the flexible printed circuit board ( 10 ).

First claim

The invention claimed is:

1. A compact motor comprising: a housing having a front end and a back end; an axis of rotation along a motor shaft of the compact motor wherein the back end of the housing is disposed along the axis and is perpendicular to the axis; a bracket comprising a back surface fixed to the back end of the housing, connection terminals provided on the back end of the housing and projecting from the back surface of the bracket away from the front end of the housing; a flexible printed circuit board comprising an end part abutting the back surface of the bracket and a wiring pattern connected to the connection terminals; a projecting part provided on the back surface of the bracket, the projecting part comprising a base and a leg, where the base extends from the back surface of the bracket in the direction of the axis and the leg extends from the base in a direction perpendicular to the axis; and a board insertion groove formed between the leg of the projecting part and the back surface of the bracket, the board insertion groove comprising a gap, in the direction of the axis, between the leg of the projecting part and the back surface of the bracket, wherein the flexible printed circuit board is inserted inside the board insertion groove and is bent along the projecting part.

2. The compact motor according to claim 1 , wherein the flexible printed circuit board abuts against the projecting part and is bent facing away from the motor and parallel to the axis of rotation.

3. The compact motor according to claim 1 , wherein, a convex curved part is formed on the leg of the projecting part so that a gap of the board insertion groove between the leg of the projecting part and the back surface of the bracket expands toward the bracket bottom part.

4. The compact motor according to claim 1 , wherein the wiring pattern of the flexible printed circuit board is extended to avoid a position at which the projecting part abuts the flexible printed circuit board when the flexible printed circuit board is bent via the projecting part.

5. The compact motor according to claim 1 , wherein the leg of the projecting part is projecting toward a bottom part of the bracket.

6. The compact motor according to claim 5 , wherein the flexible printed circuit board abuts against the projecting part and is bent away from the compact motor.

7. The compact motor according to claim 1 , wherein a weight is attached to a rotation shaft of the compact motor.

8. A mobile communication device, comprising a compact motor according to claim 7 , and a circuit board to which the flexible printed circuit board of the compact motor is connected.

9. A game device, comprising a compact motor according to claim 7 for which the weight is attached to the rotation axis, and a circuit board to which the flexible printed circuit board of the compact motor is connected.

10. The compact motor according to claim 7 , wherein the compact motor is incorporated into a mobile communication device comprising a mobile communication device circuit board to which the flexible printed circuit board of the compact motor is connected.

11. The compact motor according to claim 7 , wherein the compact motor is incorporated into a game device in which the weight is attached to the rotation shaft, and a game device circuit board is connected to the flexible printed circuit board of the compact motor.

Assignees

• Nidec Copal Corp

Inventors

• Katada Yoshinori

Classifications

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• H02K7/1876

  with reciprocating, linearly oscillating or vibrating parts · CPC title

• H02K7/1892

  Generators with parts oscillating or vibrating about an axis · CPC title

• H02K11/30

  Structural association with control circuits or drive circuits · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title