U.S. patent application number 16/254888 was filed with the patent office on 2020-06-11 for mouse roller module.
The applicant listed for this patent is PRIMAX ELECTRONICS LTD.. Invention is credited to YU-YEN SHIH.
Application Number | 20200183503 16/254888 |
Document ID | / |
Family ID | 70971403 |
Filed Date | 2020-06-11 |
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United States Patent
Application |
20200183503 |
Kind Code |
A1 |
SHIH; YU-YEN |
June 11, 2020 |
MOUSE ROLLER MODULE
Abstract
A mouse roller module includes a roller, a sensing unit, an
electromagnet and a control unit. The roller includes a ring-shaped
magnet and a rotating shaft. The rotating shaft is extended along a
first direction. When an external force is exerted on the roller,
the ring-shaped magnet is rotated about the rotating shaft. The
sensing unit is located near the roller to sense a pole of the
ring-shaped magnet. The roller is arranged between the
electromagnet and the sensing unit. The electromagnet and the
ring-shaped magnet interact with each other to generate a magnetic
force. The control unit is electrically connected with the sensing
unit and the electromagnet. The control unit controls the
electromagnet and the ring-shaped magnet of the roller to generate
the magnetic force according to a result of sensing the pole of the
ring-shaped magnet by the sensing unit.
Inventors: |
SHIH; YU-YEN; (Taipei City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PRIMAX ELECTRONICS LTD. |
Taipei City |
|
TW |
|
|
Family ID: |
70971403 |
Appl. No.: |
16/254888 |
Filed: |
January 23, 2019 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G01R 33/07 20130101;
G06F 3/016 20130101; G01R 33/072 20130101; G06F 3/03543 20130101;
G06F 3/0362 20130101; G06F 3/038 20130101; G01D 5/145 20130101 |
International
Class: |
G06F 3/0362 20060101
G06F003/0362; G06F 3/0354 20060101 G06F003/0354; G06F 3/038
20060101 G06F003/038; G06F 3/01 20060101 G06F003/01; G01R 33/07
20060101 G01R033/07 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 7, 2018 |
TW |
107144184 |
Claims
1. A mouse roller module, comprising: a roller comprising a
ring-shaped magnet and a rotating shaft, wherein the rotating shaft
is extended along a first direction, wherein when an external force
is exerted on the roller, the ring-shaped magnet is rotated about
the rotating shaft, and a position of the roller close to the
sensing unit has a tangential speed direction; a sensing unit
located near the roller to sense a pole of the ring-shaped magnet;
an electromagnet, wherein the roller is arranged between the
electromagnet and the sensing unit, and the electromagnet and the
ring-shaped magnet interact with each other to generate a magnetic
force; and a control unit electrically connected with the sensing
unit and the electromagnet, wherein the control unit controls the
electromagnet and the ring-shaped magnet of the roller to generate
the magnetic force according to a result of sensing the pole of the
ring-shaped magnet by the sensing unit.
2. The mouse roller module according to claim 1, wherein according
to the result of sensing the pole of the ring-shaped magnet by the
sensing unit, a region of the electromagnet close to the
ring-shaped magnet and the ring-shaped magnet have like poles under
control of the control unit, and the magnetic force in a second
direction is generated, wherein the second direction is not in
parallel with the first direction, and the second direction is
identical to the tangential speed direction of the roller.
3. The mouse roller module according to claim 1, wherein according
to the result of sensing the pole of the ring-shaped magnet by the
sensing unit, a region of the electromagnet close to the
ring-shaped magnet and the ring-shaped magnet have like poles under
control of the control unit, and the magnetic force in a third
direction is generated, wherein the third direction is not in
parallel with the first direction, and the third direction is
opposite to the tangential speed direction of the roller.
4. The mouse roller module according to claim 1, wherein the
ring-shaped magnet comprises a first part and a second part, which
have opposite poles, wherein according to the result of sensing the
pole of the first part of the ring-shaped magnet at a first time
point by the sensing unit, a region of the electromagnet close to
the first part of the ring-shaped magnet and the first part of the
ring-shaped magnet have like poles under control of the control
unit, and the magnetic force in a second direction is generated,
wherein according to the result of sensing the pole of the second
part of the ring-shaped magnet at a second time point by the
sensing unit, the region of the electromagnet close to the second
part of the ring-shaped magnet and the second part of the
ring-shaped magnet have like poles under control of the control
unit, and the magnetic force in the second direction is generated,
wherein the second direction is not in parallel with the first
direction, and the second direction is identical to the tangential
speed direction of the roller.
5. The mouse roller module according to claim 1, wherein the
ring-shaped magnet comprises a first part and a second part, which
have opposite poles, wherein according to the result of sensing the
pole of the first part of the ring-shaped magnet at a first time
point by the sensing unit, a region of the electromagnet close to
the first part of the ring-shaped magnet and the first part of the
ring-shaped magnet have opposite poles under control of the control
unit, and the magnetic force in a third direction is generated,
wherein according to the result of sensing the pole of the second
part of the ring-shaped magnet at a second time point by the
sensing unit, the region of the electromagnet close to the second
part of the ring-shaped magnet and the second part of the
ring-shaped magnet have opposite poles under control of the control
unit, and the magnetic force in the third direction is generated,
wherein the third direction is not in parallel with the first
direction, and the third direction is opposite to the tangential
speed direction of the roller.
6. The mouse roller module according to claim 1, wherein the
ring-shaped magnet comprises a first part and a second part, which
have opposite poles, wherein according to the result of sensing the
pole of the first part of the ring-shaped magnet at a first time
point by the sensing unit, a region of the electromagnet close to
the first part of the ring-shaped magnet and the first part of the
ring-shaped magnet have like poles under control of the control
unit, and the magnetic force in a second direction is generated,
wherein the second direction is not in parallel with the first
direction, and the second direction is identical to the tangential
speed direction of the roller, wherein according to the result of
sensing the pole of the second part of the ring-shaped magnet at a
second time point by the sensing unit, the region of the
electromagnet close to the second part of the ring-shaped magnet
and the second part of the ring-shaped magnet have opposite poles
under control of the control unit, and the magnetic force in the
third direction is generated, wherein the third direction is not in
parallel with the first direction, the third direction is opposite
to the tangential speed direction of the roller, and the third
direction is opposite to the second direction.
7. The mouse roller module according to claim 1, wherein the mouse
roller module further comprises a pulse width modulation unit,
which is electrically connected with the control unit and the
electromagnet, wherein the control unit issues a control signal to
the pulse width modulation unit according to the result of sensing
the pole of the ring-shaped magnet by the sensing unit, wherein the
pulse width modulation unit issues a pulse width modulation signal
to the electromagnet according to the control signal, and a
strength of the magnetic force provided by the electromagnet is
adjusted according to the pulse width modulation signal.
8. The mouse roller module according to claim 1, wherein the
ring-shaped magnet of the roller is a permanent magnet.
9. The mouse roller module according to claim 1, wherein the
sensing unit is a Hall sensor.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a roller module, and more
particularly to a roller module for an input device.
BACKGROUND OF THE INVENTION
[0002] In the digitalized era, computers and associated electronic
devices are very popular. For example, computers become essential
devices in every family. As known, a mouse device is an important
input device for the computer system. Via the mouse device, the
user may communicate with the computer system. In addition, the
mouse devices with improved or new functions are gradually
developed.
[0003] A mouse device is used to control a cursor on a computer
screen in order to operate the computer. Since 1968, the United
States has produced the world's first mouse device. After then, the
mouse device is applied to paper processing operations, video
games, industrial drawings, drawing design or media production.
Consequently, the mouse device has become an indispensable part of
the computer system. In the early stage, the mouse device uses a
trackball to detect the displacement of the mouse device. With
increasing development of science and technology, an optical module
or a laser module is used to detect the displacement of the mouse
device in order to enhance the working efficiency. Moreover, for
increasing the functionality and convenience of the mouse device,
the earliest wired single-button mouse device is gradually evolved
into the modern wireless multi-button roller mouse device. For
complying with different industrial needs or personal preferences,
various electronic manufacturers have begun to create a variety of
mouse device devices with different shapes in order to meet the
operation requirements of different users. Consequently, people pay
much attention to the comfort and sensitivity of pressing or
operating the left button, the right button and the middle
button.
[0004] In addition to the left button and the right button, a
roller of the mouse device is another kind of button that is
frequently used by the user of the computer. For example, by
rotating the roller, the function of browsing web pages or moving
the cursor is achieved. Alternatively, by pressing the roller, a
middle button signal is generated or the function of switching
different operation mode is achieved. For increasing the
convenience and comfort of operating the roller, a roller module of
an input device is disclosed in Taiwanese Patent No. I448928. In
the roller module, a recess or a hollow slot of the roller is
equipped with one or two different toothed surfaces. When a
swinging arm is contacted with one of the toothed surfaces, the
rotation of the roller generates different tactile feels. Moreover,
a hyper-fast roller structure of a mouse device is disclosed in
Taiwanese Patent No. M498914. A tooth part and a stopping rod are
installed in the roller module. In case that the stopping rod is
pushed by a torsion spring, the stopping rod is in close contact
with the tooth part. When a button linked with the stopping rod is
operated by the user, the roller is switched between a hyper-fast
scrolling mode and an ordinary scrolling mode.
[0005] However, since the mechanical of the mouse device for
performing the hyper-fast scrolling motion is designed according to
the principle of inertia, the conventional technologies still have
some drawbacks. For example, only some default scrolling modes are
provided for the user to switch the operation mode of the roller.
Moreover, the consumers cannot adjust the default scrolling modes
according to their requirements or the preferences. Consequently,
the consumer has to spend more time in searching the suitable mouse
device. If the mouse device is not suitable, the working efficiency
is deteriorated.
[0006] Therefore, there is a need of providing an improved mouse
roller module in order to overcome the above drawbacks.
SUMMARY OF THE INVENTION
[0007] The present invention provides a mouse roller module. The
mouse roller module is equipped with a sensing unit for sensing the
pole of a ring-shaped magnet within a roller. Under control of a
control unit, the pole of the ring-shaped magnet and the pole of
the electromagnet close to the ring-shaped magnet are like poles or
opposite poles. Due to this design, the user can adjust the
rotating effect of the roller according to the practical
requirements. Consequently, the rotating speed of the roller can be
selectively increased or decreased.
[0008] The other objects and advantages of the present invention
will be understood from the disclosed technical features.
[0009] In accordance with an aspect of the present invention, there
is provided a mouse roller module. The mouse roller module includes
a roller, a sensing unit, an electromagnet and a control unit. The
roller includes a ring-shaped magnet and a rotating shaft. The
rotating shaft is extended along a first direction. When an
external force is exerted on the roller, the ring-shaped magnet is
rotated about the rotating shaft, and a position of the roller
close to the sensing unit has a tangential speed direction. The
sensing unit is located near the roller to sense a pole of the
ring-shaped magnet. The roller is arranged between the
electromagnet and the sensing unit. The electromagnet and the
ring-shaped magnet interact with each other to generate a magnetic
force. The control unit is electrically connected with the sensing
unit and the electromagnet. The control unit controls the
electromagnet and the ring-shaped magnet of the roller to generate
the magnetic force according to a result of sensing the pole of the
ring-shaped magnet by the sensing unit.
[0010] From the above descriptions, the present invention provides
the mouse roller module. The mouse roller module is equipped with
the sensing unit for sensing the pole of the ring-shaped magnet
within the casing of the roller. The control unit controls the
electromagnet and the ring-shaped magnet to generate a magnetic
force according to the result of sensing the pole of the
ring-shaped magnet. The pole of the ring-shaped magnet and the pole
of the electromagnet close to the ring-shaped magnet are like poles
or opposite poles. Due to this design, the user can adjust the
rotating effect of the roller according to the practical
requirements. Consequently, the rotating speed of the roller can be
selectively increased or decreased. Consequently, the flexibility
and tactile feel of operating the mouse roller module are
enhanced.
[0011] The above objects and advantages of the present invention
will become more readily apparent to those ordinarily skilled in
the art after reviewing the following detailed description and
accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 schematically illustrates a mouse roller module
according to a first embodiment of the present invention and in a
first usage state;
[0013] FIG. 2 schematically illustrates the mouse roller module as
shown in FIG. 1 and in a second usage state;
[0014] FIG. 3 schematically illustrates a mouse roller module
according to a second embodiment of the present invention and in a
first usage state;
[0015] FIG. 4 schematically illustrates the mouse roller module as
shown in FIG. 3 and at a different operating time point;
[0016] FIG. 5 schematically illustrates the mouse roller module as
shown in FIG. 3 and in a second usage state;
[0017] FIG. 6 schematically illustrates the mouse roller module as
shown in FIG. 5 and at a different operating time point;
[0018] FIG. 7 schematically illustrates the mouse roller module as
shown in FIG. 3 and in a third usage state;
[0019] FIG. 8 schematically illustrates the mouse roller module as
shown in FIG. 7 and at a different operating time point; and
[0020] FIG. 9 schematically illustrates a mouse roller module
according to a third embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0021] Please refer to FIGS. 1 and 2. FIG. 1 schematically
illustrates a mouse roller module according to a first embodiment
of the present invention and in a first usage state. FIG. 2
schematically illustrates the mouse roller module as shown in FIG.
1 and in a second usage state. As shown in FIGS. 1 and 2, the mouse
roller module 1 comprises a roller 11, a sensing unit 12, an
electromagnet 13 and a control unit 14.
[0022] The roller 11 comprises a ring-shaped magnet 111 and a
rotating shaft 112. The rotating shaft 112 is extended along a
first direction D 1. The roller 11 further comprises a casing 110.
The ring-shaped magnet 111 and the rotating shaft 112 are disposed
within the casing 120. In addition, a portion of the rotating shaft
112 is exposed outside the casing 120 and connected with other
components (not shown) of the mouse device. When an external force
is exerted on the casing 110 of the roller 11, the ring-shaped
magnet 111 and the casing 110 are rotated about the rotating shaft
112. In this embodiment, the roller 11 is rotated in a clockwise
direction S1. The rotating direction of the roller 11 is not
restricted. For example, in another embodiment, the roller 11 is
rotated in a counterclockwise direction. Preferably but not
exclusively, the ring-shaped magnet 111 is permanent magnet. The
sensing unit 12 is arranged near the roller 11. The sensing unit 12
is used for sensing the pole of the ring-shaped magnet 111 within
the casing 110 of the roller 11. In this embodiment, the sensing
unit 12 is a Hall sensor, and the sensing unit 12 is located under
the roller 11. When the roller 11 is rotated in response to the
external force, the pole of the ring-shaped magnet 111 over the
sensing unit 12 is sensed by the sensing unit 12. It is noted that
the installation position of the sensing unit 12 is not restricted.
The roller 11 is arranged between the electromagnet 13 and the
sensing unit 12. The electromagnet 13 and the ring-shaped magnet
111 interact with each other to generate a magnetic force. The
control unit 14 is electrically connected with the sensing unit 12
and the electromagnet 13. After sensing the pole of the ring-shaped
magnet 111, the sensing unit 12 generates a sensing result.
According to the sensing result, the control unit 14 controls the
electromagnet 13 and the ring-shaped magnet 111 to generate a
magnetic force.
[0023] The structures and operations of the mouse roller module 1
will be described in more details as follows.
[0024] As shown in FIG. 1, the pole of the ring-shaped magnet 111
within the casing 110 of the roller 11 is the N pole. In a first
usage state, the user issues a command to the mouse roller module 1
to increase the rotating effect of the roller 11. The sensing
result of the sensing unit 12 indicates that the pole of the
ring-shaped magnet 111 is the N pole. According to the sensing
result, the control unit 14 issues a control signal to the
electromagnet 13. According to the control signal, the
electromagnet 13 and the ring-shaped magnet 111 have like poles.
That is, the region of the electromagnet 13 close to the
ring-shaped magnet 111 has the N pole. Since like poles repel each
other, a magnetic force in a second direction D2 is generated by
the electromagnet 13 and the ring-shaped magnet 111. In addition,
the magnetic force is a repelling force. The second direction D2 of
the magnetic force is not in parallel with the first direction D1
(i.e., the extending direction of the rotating shaft 112.
Preferably but not exclusively, the second direction D2 is
perpendicular to the first direction D1. In case that the second
direction D2 is perpendicular to the first direction D1, the
magnetic force between the electromagnet 13 and the ring-shaped
magnet 111 can be smoothly exerted on the roller 11. Consequently,
the rotating speed of the roller 11 is increased. Moreover, since
the magnetic force is the repelling force, the tangential speed
direction of the roller 11 close to the sensing unit 12 is
identical to the second direction D2 (i.e., the direction of the
magnetic force). Since the ring-shaped magnet 111 is repelled by
the repelling force, the rotating speed of the roller 11 is
increased.
[0025] Please refer to FIG. 2. In a second usage state, the user
issues a command to the mouse roller module 1 to decrease the
rotating effect of the roller 11. The sensing result of the sensing
unit 12 indicates that the pole of the ring-shaped magnet 111 is
the N pole. According to the sensing result, the control unit 14
issues a control signal to the electromagnet 13. According to the
control signal, the electromagnet 13 and the ring-shaped magnet 111
have opposite poles. That is, the region of the electromagnet 13
close to the ring-shaped magnet 111 has the S pole. Since unlike
poles attract each other, a magnetic force in a third direction D3
is generated by the electromagnet 13 and the ring-shaped magnet
111. In addition, the magnetic force is an attractive force. The
third direction D3 of the magnetic force is not in parallel with
the first direction D1 (i.e., the extending direction of the
rotating shaft 112. Preferably but not exclusively, the third
direction D3 is perpendicular to the first direction D1. In case
that the third direction D3 is perpendicular to the first direction
D1, the magnetic force between the electromagnet 13 and the
ring-shaped magnet 111 can be smoothly exerted on the roller 11.
Consequently, the rotating speed of the roller 11 is decreased.
Moreover, since the magnetic force is the attractive force, the
tangential speed direction of the roller 11 close to the sensing
unit 12 is opposite to the third direction D3 (i.e., the direction
of the magnetic force). Since the ring-shaped magnet 111 is
attracted by the attractive force, the rotating speed of the roller
11 is decreased.
[0026] As mentioned above, the mouse roller module 1 is equipped
with the sensing unit 12 for sensing the pole of the ring-shaped
magnet 111 within the casing 110 of the roller 11. The control unit
14 controls the electromagnet 13 and the ring-shaped magnet 111 to
generate a magnetic force according to the result of sensing the
pole of the ring-shaped magnet 111. The pole of the ring-shaped
magnet 111 and the pole of the electromagnet 13 close to the
ring-shaped magnet 111 are like poles or opposite poles. Due to
this design, the user can adjust the rotating effect of the roller
11 according to the practical requirements. That is, the rotating
speed of the roller 11 can be selectively increased or decreased.
Consequently, the flexibility and tactile feel of operating the
mouse roller module are enhanced.
[0027] Another embodiment of the mouse roller module will be
described with reference to FIGS. 3 to 8.
[0028] FIG. 3 schematically illustrates a mouse roller module
according to a second embodiment of the present invention and in a
first usage state. FIG. 4 schematically illustrates the mouse
roller module as shown in FIG. 3 and at a different operating time
point. FIG. 5 schematically illustrates the mouse roller module as
shown in FIG. 3 and in a second usage state. FIG. 6 schematically
illustrates the mouse roller module as shown in FIG. 5 and at a
different operating time point. FIG. 7 schematically illustrates
the mouse roller module as shown in FIG. 3 and in a third usage
state. FIG. 8 schematically illustrates the mouse roller module as
shown in FIG. 7 and at a different operating time point. Except for
the structure of the ring-shaped magnet, the components of the
mouse roller module la of this embodiment are similar to those of
the mouse roller module of FIGS. 1 and 2. In this embodiment, the
ring-shaped magnet 111a of the roller 11a comprises a first part P1
and a second part P2. The first part P1 and the second part P2 have
opposite poles. In this embodiment, the first part P1 has the N
pole, and the second part P2 has the S pole.
[0029] Please refer to FIGS. 3 and 4. In a first usage state, the
user issues a command to the mouse roller module 1a to increase the
rotating effect of the roller 11a. At the first time point as shown
in FIG. 3, the sensing result of the sensing unit 12 indicates that
the pole of the first part P1 of the ring-shaped magnet 111a is the
N pole. According to the sensing result, the control unit 14 issues
a control signal to the electromagnet 13. According to the control
signal, the electromagnet 13 and the first part P1 of the
ring-shaped magnet 111a have like poles. That is, the region of the
electromagnet 13 close to the first part P1 of the ring-shaped
magnet 111a has the N pole. Since like poles repel each other, a
magnetic force in a second direction D2 is generated by the
electromagnet 13 and the first part P1 of the ring-shaped magnet
111a. In addition, the magnetic force is a repelling force. The
roller 11a is continuously rotated.
[0030] At the second time point as shown in FIG. 4, the second part
P2 of the ring-shaped magnet 111a is within the sensitive range of
the sensing unit 12 and thus sensed by the sensing unit 12. At the
second time point, the sensing result of the sensing unit 12
indicates that the pole of the second part P2 of the ring-shaped
magnet 111a is the S pole. According to the sensing result, the
control unit 14 issues a control signal to the electromagnet 13.
According to the control signal, the electromagnet 13 and the
second part P2 of the ring-shaped magnet 111a have like poles. That
is, the region of the electromagnet 13 close to the ring-shaped
magnet 111a has the S pole. Since like poles repel each other, a
magnetic force in the second direction D2 is generated by the
electromagnet 13 and the second part P2 of the ring-shaped magnet
111a. In addition, the magnetic force is a repelling force.
[0031] The second direction D2 of the magnetic force is not in
parallel with the first direction D1 (i.e., the extending direction
of the rotating shaft 112. Preferably but not exclusively, the
second direction D2 is perpendicular to the first direction D1. In
case that the second direction D2 is perpendicular to the first
direction D1, the magnetic force between the first part P1 and the
second part P2 of the electromagnet 13 and the ring-shaped magnet
111a can be smoothly exerted on the roller 11a. Consequently, the
rotating speed of the roller 11a is increased. Moreover, since the
magnetic force between the first part P1 (and the second part P2)
of the electromagnet 13 and the ring-shaped magnet 111a is the
repelling force, the tangential speed direction of the roller 11a
close to the sensing unit 12 is identical to the second direction
D2 (i.e., the direction of the magnetic force). Since the first
part P1 (and the second part P2) of the ring-shaped magnet 111a is
repelled by the repelling force, the rotating speed of the roller
11a is increased.
[0032] Please refer to FIGS. 5 and 6. In a second usage state, the
user issues a command to the mouse roller module 1a to decrease the
rotating effect of the roller 11a. At the first time point as shown
in FIG. 5, the sensing result of the sensing unit 12 indicates that
the pole of the first part P1 of the ring-shaped magnet 111a is the
N pole. According to the sensing result, the control unit 14 issues
a control signal to the electromagnet 13. According to the control
signal, the electromagnet 13 and the first part P1 of the
ring-shaped magnet 111a have opposite poles. That is, the region of
the electromagnet 13 close to the ring-shaped magnet 111a has the S
pole. Since opposite poles attract each other, a magnetic force in
a third direction D3 is generated by the electromagnet 13 and the
first part P1 of the ring-shaped magnet 111a. In addition, the
magnetic force is an attractive force. The roller 11a is
continuously rotated.
[0033] At the second time point as shown in FIG. 6, the second part
P2 of the ring-shaped magnet 111a is within the sensitive range of
the sensing unit 12 and thus sensed by the sensing unit 12. At the
second time point, the sensing result of the sensing unit 12
indicates that the pole of the second part P2 of the ring-shaped
magnet 111a is the S pole. According to the sensing result, the
control unit 14 issues a control signal to the electromagnet 13.
According to the control signal, the electromagnet 13 and the
second part P2 of the ring-shaped magnet 111a have opposite poles.
That is, the region of the electromagnet 13 close to the
ring-shaped magnet 111a has the N pole. Since opposite poles
attract each other, a magnetic force in a third direction D3 is
generated by the electromagnet 13 and the second part P2 of the
ring-shaped magnet 111a. In addition, the magnetic force is an
attractive force.
[0034] The third direction D3 of the magnetic force is not in
parallel with the first direction D1 (i.e., the extending direction
of the rotating shaft 112. Preferably but not exclusively, the
third direction D3 is perpendicular to the first direction D1. In
case that the third direction D3 is perpendicular to the first
direction D1, the magnetic force between the electromagnet 13 and
the first part P1 and the second part P2 of ring-shaped magnet 111a
can be smoothly exerted on the roller 11a. Consequently, the
rotating speed of the roller 11a is decreased. Moreover, since the
magnetic force between the first part P1 (and the second part P2)
of the electromagnet 13 and the ring-shaped magnet 111a is the
attractive force, the tangential speed direction of the roller 11a
close to the sensing unit 12 is opposite to the third direction D3
(i.e., the direction of the magnetic force). Since the ring-shaped
magnet 111a is attracted by the attractive force, the rotating
speed of the roller 11a is decreased.
[0035] As shown in FIGS. 7 and 8, the mouse roller module 1a is in
a third usage state. At the first time point as shown in FIG. 7,
the sensing result of the sensing unit 12 indicates that the pole
of the first part P1 of the ring-shaped magnet 111a is the N pole.
According to the sensing result, the control unit 14 issues a
control signal to the electromagnet 13. According to the control
signal, the electromagnet 13 and the first part P1 of the
ring-shaped magnet 111a have like poles. That is, the region of the
electromagnet 13 close to the ring-shaped magnet 111a has the N
pole. Since like poles repel each other, a magnetic force in a
second direction D2 is generated by the electromagnet 13 and the
first part P1 of the ring-shaped magnet 111a. In addition, the
magnetic force is a repelling force. The roller 11a is continuously
rotated.
[0036] At the second time point as shown in FIG. 8, the second part
P2 of the ring-shaped magnet 111a is within the sensitive range of
the sensing unit 12 and thus sensed by the sensing unit 12. At the
second time point, the sensing result of the sensing unit 12
indicates that the pole of the second part P2 of the ring-shaped
magnet 111a is the S pole. According to the sensing result, the
control unit 14 issues a control signal to the electromagnet 13.
According to the control signal, the electromagnet 13 and the
second part P2 of the ring-shaped magnet 111a have opposite poles.
That is, the region of the electromagnet 13 close to the
ring-shaped magnet 111a has the N pole. Since opposite poles
attract each other, a magnetic force in a third direction D3 is
generated by the electromagnet 13 and the second part P2 of the
ring-shaped magnet 111a. In addition, the magnetic force is an
attractive force.
[0037] In the third usage state, the efficacy of increasing the
operating speed of the roller 11a and the efficacy of decreasing
the operating speed of the roller 11a are alternately achieved.
Consequently, the rotating speed of the roller 11a is adjusted to a
desired speed between the high rotating speed and the low rotating
speed.
[0038] This embodiment may be varied according to the practical
requirement. In case that the pole of the first part P1 of the
ring-shaped magnet 111a is the N pole, the electromagnet 13 and the
first part P1 of the ring-shaped magnet 111a have opposite poles
according to the control signal from the control unit 14. That is,
the region of the electromagnet 13 close to the ring-shaped magnet
111a has the S pole. In case that the pole of the second part P2 of
the ring-shaped magnet 111a is the S pole, the electromagnet 13 and
the first part P1 of the ring-shaped magnet 111a have like poles
according to the control signal from the control unit 14. That is,
the region of the electromagnet 13 close to the ring-shaped magnet
111a has the S pole.
[0039] FIG. 9 schematically illustrates a mouse roller module
according to a third embodiment of the present invention. The
components of the mouse roller module 1b of this embodiment are
similar to those of the mouse roller module 1 as shown in FIGS. 1
and 2 except that the mouse roller module 1b of this embodiment
further comprises a pulse width modulation unit 15. The pulse width
modulation unit 15 is electrically connected with the control unit
14 and the electromagnet 13. After sensing the pole of the
ring-shaped magnet 111, the sensing unit 12 generates a sensing
result. According to the sensing result, the control unit 14 issues
a control signal to the pulse width modulation unit 15. According
to the control signal from the control unit 14, the pulse width
modulation unit 15 issues a pulse width modulation signal to the
electromagnet 13. Consequently, the strength of the magnetic force
provided by the electromagnet 13 is correspondingly adjusted. That
is, when the user issues the command for increasing or decreasing
the strength of the magnetic force of the electromagnet 13, the
pulse width modulation unit 15 generates the pulse width modulation
signal corresponding to the strength of the magnetic force.
Consequently, when the mouse roller module is in each of the usage
states as shown in FIGS. 1 to 8, the rotating speed of the roller
11 can be further adjusted.
[0040] From the above descriptions, the present invention provides
the mouse roller module. The mouse roller module is equipped with
the sensing unit for sensing the pole of the ring-shaped magnet
within the casing of the roller. The control unit controls the
electromagnet and the ring-shaped magnet to generate a magnetic
force according to the result of sensing the pole of the
ring-shaped magnet. The pole of the ring-shaped magnet and the pole
of the electromagnet close to the ring-shaped magnet are like poles
or opposite poles. Due to this design, the user can adjust the
rotating effect of the roller according to the practical
requirements. That is, the rotating speed of the roller can be
selectively increased or decreased. Consequently, the flexibility
and tactile feel of operating the mouse roller module are
enhanced.
[0041] While the invention has been described in terms of what is
presently considered to be the most practical and preferred
embodiments, it is to be understood that the invention needs not be
limited to the disclosed embodiments. On the contrary, it is
intended to cover various modifications and similar arrangements
included within the spirit and scope of the appended claims which
are to be accorded with the broadest interpretation so as to
encompass all modifications and similar structures.
* * * * *