Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2000-09-28
2003-12-16
Le, Dang (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S081000, C310S06700R, C310S091000
Reexamination Certificate
active
06664676
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a construction of a mini-motor and a method of assembling the mini-motor at high productivity. More particularly, the present invention relates to a micro-motor producing vibration sensible to a human body. This micro-motor is employed in a cellular-phone to notify a user of a call with the vibration.
BACKGROUND ART
A motor used in information devices comprises the following elements:
a metal base;
a bearing, a printed circuit board, and a stator mounted to the metal base;
a cylindrical rotor magnet mounted on an outer or inner wall of the stator core, thereby facing the magnet to the stator core.
When a motor has a certain size, this structure is easy to assemble; however, downsizing the motor increases difficulties of assembling and lowers the productivity because assembling machines or operators' finger-tips cannot access to inside or even cannot access close to the motor.
The Japanese Patent Application Non-Examined Publication No. H10-127031 addresses the problem discussed above.
FIG. 10
illustrates the motor of this prior art.
In
FIG. 10
, metal wired-board
14
is buried in base
24
made of synthetic resin with maintaining the insulation. A first end of board
14
extends over an upper end of base
24
as riser
40
, and a second end is exposed as a connector terminal.
This structure allows terminal
42
of winding
18
coiled on stator core
20
to be coupled to riser
40
with ease.
However, downsizing the motor reveals a problem, i.e. elements of the motor are hard to handle by operators. For instance, a motor of 10 mm across gives us a difficulty to handle its components quickly. Further downsizing of the motor requires severer mating allowances between the components. This increases the difficulty of assembling the components into a motor. As such, the productivity is traded off for downsizing the motor. A breakthrough method of this problem has been enthusiastically demanded.
A section bonded with another section or a section undergone resin-welding needs time before it is fixed to. Shortening this waiting time has been also demanded.
SUMMARY OF THE INVENTION
The present invention addresses the problems, discussed above, and aims to provide a motor having a structure allowing high productivity as well as a method of assembling the same motor by solving problems such as difficulty of handling, severity of mating, time-consuming of bonding or welding.
A motor-base-holder of the present invention comprises the following elements:
(a) a motor base including;
(a-1) a base;
(a-2) a bearing supporter protruded vertically from the base for supporting a baring;
(a-3) a stator supporter concentric with the bearing supporter for being mounted with a stator;
(a-4) a terminal made of metal plate and insert-molded around the bearing supporter;
(b) a frame made of the same metal as the terminal and linked with fringe section of he motor base
A motor of the present invention comprises the following elements:
(a) a motor base including;
(a-1) a base;
(a-2) a bearing supporter protruded vertically from the base for supporting a bearing;
(a-3) a stator supporter concentric with the bearing supporter;
(a-4) a terminal made of metal plate and insert-molded around the bearing supporter;
The motor base is formed by cutting off bridges linking between the motor base and the frame around the motor base.
(b) a stator mounted to the stator supporter; and
(c) a rotor supported by the bearing which is supported by the bearing supporter.
Another motor of the present invention comprises the following elements:
(a) a stator having a stator core;
(b) a motor base including:
(b-1) a base;
(b-2) a bearing supporter protruded vertically from the base for supporting a bearing;
(b-3) a stator supporter concentric with the bearing supporter;
(b-4) a stator fixer extending from the stator supporter; and
(c) a rotor supported by the bearing supported by the bearing supporter.
After the stator core is inserted into the stator supporter, a bushing is press-fitted into the stator fixer, thereby fixing the stator.
Still another motor of the present invention comprises the following elements:
(a) a motor base including:
(a-1) a base;
(a-2) a bearing supporter protruded vertically from the base for supporting a bearing;
(a-3) a stator supporter;
(a-4) a terminal made of metal plate and disposed around the bearing supporter;
(a-5) a metal tip extended outside of the motor base;
(b) a stator mounted to the stator supporter;
(c) a rotor supported by the bearing which is supported by the bearing supporter; and
(d) a metal cover of which terminal is fixed to the metal tip, for covering the rotor.
The motor discussed above may be assembled through the following steps:
(a) positioning and supporting the motor base at a given place by the frame;
(b) assembling the stator and the rotor to the motor base; and
(c) detaching the motor base from the frame.
The present invention discussed above can solve the problems particularly in mini-motors such as difficulties in handling the parts of the motor, difficulties in mating the respective components, time-consuming of bonding or welding. As a result, a motor of high productivity and a method of assembling the motor can be obtained.
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International Search
Fukuoka Kodo
Kuyama Koji
Yoshida Shigeru
Le Dang
Matsushita Electric - Industrial Co., Ltd.
RatnerPrestia
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