Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
1999-06-10
2002-05-14
Tamai, Karl (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S071000, C439S592000
Reexamination Certificate
active
06388349
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a vibrator mounting structure for mounting a vibrator which vibrates a mobile wireless device and reports the reception of a signal when a signal is received by a mobile wireless device such as a mobile wireless telephone, a cordless telephone, a PHS, wireless communication devices and other kinds of mobile information processing terminals.
BACKGROUND TO THE INVENTION
When for example the ring tone of a mobile wireless device which has received a signal will disturb the surrounding people in a movie theatre, concert hall, a conference or the like, or when it is desired to confirm the reception of a signal without other people realizing it, a vibrator function which reports the reception of a signal by vibrating the vibrator is provided in a mobile wireless device.
The vibrations of the vibrator when a signal is received are generated by a motor which rotates an eccentrically balanced counter weight. Thus in order to rotate the motor, it is necessary to supply the motor with electrical force. A system of supplying the motor with electrical force generally from a power source through a lead line is used for this purpose.
However the method of using a lead line to supply the motor entails the problems of soldering the lead line after mounting the vibrator in the mobile wireless device. Hence the operation of mounting the vibrator (the operation of assembling the mobile wireless device) becomes complicated.
A supply method which does not entail the complication of soldering involves connecting the supply land to the motor terminal.
By this type of connecting supply method, it is possible to mount the vibrator easily in the mobile wireless device without the necessity to solder the lead line.
FIG. 1
is a cross section of a conventional vibrator mounting using the connecting supply method. In the figure,
2
is a mobile wireless device case formed from a resinous material.
2
A is a space storing the vibrator
4
provided in the case
2
.
2
A
1
is a wall face on the counter weight side of the space
2
A.
2
A
2
is a space wall face which acts as a first case wall face abutting with the bracket of the space
2
A.
2
A
3
is a bottom face of the space
2
A. The holder gripping faces
2
A
4
,
2
A
5
of the space
2
A which act as second and third case wall faces opposing each face on both sides of the motor main body are not shown in the figure. (Refer to
FIG. 5
) A rib
2
A
a
is provided in the space
2
A (bottom face
2
A
3
, holder gripping faces
2
A
4
,
2
A
5
) for the purpose of limiting the mounting position of the vibrator
4
. The bottom face
2
A
3
of the space
2
A is formed in a U shape to conform with the outer cylindrical face of the motor main body
5
.
3
is a base plate sandwiched between the case
1
(not shown in
FIG. 1
) and the case
2
(refer to
FIG. 2
) A supply land
31
used to supply electrical force to the vibrator
4
is provided in the base plate face
3
A of the base plate
3
.
4
is a vibrator which vibrates the mobile wireless device.
5
is a cylindrical motor main body which rotates when a signal is received. The rotation of the motor main body
5
is transmitted to the rotation shaft
5
a.
6
is a counter weight which is mounted eccentrically with respect to the rotation shaft
5
a
of the motor main body
5
. The counter weight
6
rotates together with the rotations of the rotation shaft
5
a.
7
is a flexible holder which comprises a flexible body and which is mounted on and closely adheres to the side face of the motor main body
5
so as to cover the motor main body
5
.
8
is a bracket which is provided on the terminal face of the opposite side to that on which the counter weight of the motor main body
5
is mounted.
9
is a supply terminal which is mounted on the bracket
8
for supplying electrical force to the motor main body
5
. The supply terminal
9
has a spring characteristic which impels elastic force (righting moment) in the radial direction of the motor main body
5
. The supply terminal
9
is bent somewhat in the shape of an inverted “V” as shown in the figures and the bent section
9
a
which forms the apex of the inverted “V” shape of the supply terminal
9
is pressing against the supply land
31
. The supply terminal
9
is provided with a pair of plate shaped elements although this can not be determined from FIG.
1
. (Refer to
FIG. 5
) The bent section
9
a
of the supply terminal
9
and the supply land
31
are placed in contact by line contact.
In order to improve the reliability of the contact point of the supply land
31
and the bent section
9
a
(so that transmission of electrical power ensured), the surface of the supply terminal
9
and the supply land
31
is normally metal plated.
Hence the vibrator
4
is comprised of a motor main body
5
, a counter weight
6
, a bracket
8
, and a supply terminal
9
.
Next the mounting operation and signal receiving operation of the vibrator will be explained.
First the vibrator
4
is arranged into the space
2
A of the case
2
. The vibrator
4
(motor main body
5
) is set in position with its terminal face on the side on which the counter weight is mounted on the rib
2
A
2
of the space
2
A by the terminal face of the bracket
8
on the space wall face
2
A
2
of the case
2
. Hence the mounting position of the axial direction of the motor main body
5
is determined. The vibrator
4
is fixed in the space
2
A since the bottom face
2
A
3
of the space
2
A is formed in a U shape to conform with the outer surface of the cylindrical motor main body
5
and the holder
7
presses against the space wall faces
2
A
4
,
2
A
5
. (Refer to
FIG. 5
)
The base plate
3
is inserted tightly between the case
1
(not shown in
FIG. 1
) and the case
2
. In this way, when the base plate
3
is sandwiched between the case
1
,
2
, the base plate presses down on the supply terminal
9
, and the contact part
9
a
of the supply terminal
9
is pushed against the supply land
31
of the base plate
3
.
In this state, when a signal is received by the mobile wireless device, electrical force is supplied to the motor main body
5
through the supply terminal
9
and the supply land
31
. The rotation shaft
5
a
of the motor main body
5
rotates at a certain angular speed. When the rotation shaft
5
a
of the motor main body rotates, the counter weight
6
which is mounted eccentrically with respect to the rotating shaft
5
a
rotates. A centrifugal force is generated by the rotations of the counter weight
6
. The centrifugal force vibrates the vibrator
4
and those vibrations are transmitted through the case
1
,
2
to report the signal reception.
In this way, in the vibrator mounting device shown in
FIG. 1
, mounting is easily performed by supplying electricity through the connection of the supply land
31
and the supply terminal
9
which has a spring characteristic and by arranging the vibrator
4
in the space
2
A.
Prior art relevant to the present application are Japanese Utility Model Publication Sho 62-23248 and Japanese Patent Laid-Open Application Hei 8-186626.
Since the conventional mounting for a vibrator is constructed in such a way, the mounting operation of a vibrator
4
of a contact supply type (assembly operation of the mobile wireless device) is easily performed. However when a signal is received and the vibrator moves relative to the case
2
due to the vibrations of the vibrator
4
, the contact point is liable to deteriorate due to the supply land
31
and the supply terminal sliding with respect to one another which results in the metal plate wearing off. (Generally the rear face of the supply terminal
9
is metal plated with a layer of nickel plate underneath. When the metal plate wears off, the nickel is exposed to the air and is easily oxidized. Oxidized nickel is a poor conductor and thus electrical conductivity at the contact point deteriorates.) The spring strength of the supply terminal
9
is weakened due to stress relaxation (becomes lax). Thus the problem arises that it is di
Inubushi Toshiya
Ioka Seiji
Rothwell Figg Ernst & Manbeck
Tamai Karl
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