ROLLER MODULE AND INPUT DEVICE WITH SAME

A roller module includes a scroll wheel, a magnetization member, a swinging element and a pole-reversible magnetic element. The magnetization member is synchronously rotated with the scroll wheel. The swinging element includes a pivotal part, a first magnetic element and a second magnetic element. The first magnetic element and the second magnetic element are movable by using the pivotal part as a rotation center. The pole-reversible magnetic element and the first magnetic element interact with each other. Consequently, the second magnetic element is close to or away from the magnetization member.

FIELD OF THE INVENTION

The present invention relates to a roller module, and more particularly to a roller module that is selectively operable in one of a step step scrolling mode and a smooth scrolling mode.

BACKGROUND OF THE INVENTION

Conventionally, a mouse device is equipped with a roller module. In some high-end mouse devices, the roller module can be operated in one of a step scrolling mode and a smooth scrolling mode. However, when the operation mode of the roller module is switched between the step scrolling mode and the smooth scrolling mode, unpleasant noises are easily generated inside the mouse. Due to the unpleasant noises, the user may doubt about the quality and confidence of the product. Furthermore, the existing switching mechanism is usually equipped with a motor to switch the operation mode. However, since the internal space of the mouse device is limited, the layout space of other components within the mouse device will be restricted by the motor.

Therefore, the switching mechanism of the conventional roller module needs to be further improved.

SUMMARY OF THE INVENTION

In order to overcome the drawbacks of the conventional technologies, the present invention provides a roller module. The roller module is applied to an input device. Due to the cooperation of a pole-reversible magnetic element, a swinging element and a magnetization member, the generated sound is attenuated while the operating mode of a scroll wheel of the roller module is switched between a step scrolling mode and a smooth scrolling mode. Moreover, due to the cooperation of the swinging element and a ball bearing, the abrasion is reduced. In addition, the swinging element can be swung more easily, and the use life of the product is extended. The operating mode is switched according to the operations of the pole-reversible magnetic element. When compared with a motor, the installation volume is reduced. In addition, the installation space of other components of the input device is not restricted by the pole-reversible magnetic element.

In accordance with an aspect of the present invention, a roller module is provided. The roller module includes a scroll wheel, a magnetization member magnetization member, a swinging element and a pole-reversible magnetic element. The magnetization member magnetization member is synchronously rotated with the scroll wheel. The swinging element includes a pivotal part, a first magnetic element and a second magnetic element. The first magnetic element and the second magnetic element are movable by using the pivotal part as a rotation center. The pole-reversible magnetic element and the first magnetic element interact with each other. Consequently, the second magnetic element is close to or away from the magnetization member magnetization member.

In an embodiment, the magnetization member magnetization member has a gear structure. The gear structure includes plural tooth tips and plural tooth roots, which are alternately arranged in a radial direction. When the second magnetic element is away from the magnetization member, the scroll wheel is rotated in a smooth scrolling mode. When the second magnetic element is close to the magnetization member, a magnetic attraction force between the second magnetic element and the plural tooth tips of the magnetization member is larger than a magnetic attraction force between the second magnetic element and the plural tooth roots of the magnetization member, so that the scroll wheel is rotated in a step scrolling mode.

In an embodiment, the second magnetic element includes a first magnet, a second magnet and a third magnet. The second magnet is stacked on a top side of the first magnet. The third magnet is stacked on a bottom side of the first magnet. An S-pole terminal and an N-pole terminal of the first magnet are arranged along a horizontal direction. The S-pole terminal of the first magnet is close to a tooth tip of the plural tooth tips of the magnetization member. An S-pole terminal and an N-pole terminal of the second magnet are arranged along a vertical direction. The S-pole terminal of the second magnet faces the first magnet. An S-pole terminal and an N-pole terminal of the third magnet are arranged along the vertical direction. The S-pole terminal of the third magnet faces the first magnet.

In an embodiment, the second magnetic element includes a first magnet, a second magnet and a third magnet. The second magnet is stacked on a top side of the first magnet. The third magnet is stacked on a bottom side of the first magnet. An S-pole terminal and an N-pole terminal of the first magnet are arranged along a horizontal direction. The N-pole terminal of the first magnet is close to a tooth tip of the plural tooth tips of the magnetization member. An S-pole terminal and an N-pole terminal of the second magnet are arranged along a vertical direction. The N-pole terminal of the second magnet faces the first magnet. The S-pole terminal and the N-pole terminal of the third magnet are arranged along the vertical direction. The N-pole terminal of the third magnet faces the first magnet.

In an embodiment, the magnetization member has an external gear structure. The magnetization member has a central channel. The scroll wheel includes a rotation shaft. An end of the rotation shaft is inserted into and fixed in the central channel. Consequently, the magnetization member is permitted to be synchronously rotated with the scroll wheel.

In an embodiment, the magnetization member has an internal gear structure with an outer ring surface, and the scroll wheel has an inner ring surface. The outer ring surface of the magnetization member is fixed on the inner ring surface of the scroll wheel.

In an embodiment, the magnetization member includes plural magnetization sheets, and the plural magnetization sheets are stacked along an axial direction.

In an embodiment, the magnetization member includes plural magnetization blocks and a circular disc. The plural magnetization blocks are formed on the circular disc and distributed radially. The scroll wheel includes a concave structure. The circular disc is disposed within the concave structure.

In an embodiment, the roller module further includes a supporting seat and a ball bearing. The scroll wheel, the magnetization member and the swinging element are supported by the supporting seat. The supporting seat includes a pivotal shaft. The pivotal part of the swinging element is a shaft bushing. The pivotal part of the swinging element is installed on the pivotal shaft of the supporting seat. The ball bearing is arranged between the shaft bushing of the swinging element and the pivotal shaft of the supporting seat. The ball bearing includes an inner ring part and an outer ring part. The inner ring part is contacted with the pivotal shaft of the supporting seat. The outer ring part is contacted with the shaft bushing of the swinging element.

In an embodiment, the roller module further includes a buffering structure. The buffering structure is arranged between the supporting seat and the swinging element.

In an embodiment, a distance between the first magnetic element and the pivotal part is longer than a distance between the second magnetic element and the pivotal part.

In an embodiment, the pole-reversible magnetic element includes a magnetic core and a coil. The coil is wound around the magnetic core. When an electric current flows through the coil, a pole layout of the pole-reversible magnetic element is opposite to a pole layout of the magnetic core.

In an embodiment, the roller module further includes a buffering structure. The buffering structure is arranged between the pole-reversible magnetic element and the first magnetic element.

In accordance with another aspect of the present invention, an input device is provided. The input device includes a casing and a roller module. The casing includes an opening. The roller module includes a scroll wheel, a magnetization member, a swinging element and a pole-reversible magnetic element. The scroll wheel is partially exposed outside through the opening. The magnetization member is synchronously rotated with the scroll wheel. The swinging element includes a pivotal part, a first magnetic element and a second magnetic element. The first magnetic element and the second magnetic element are movable by using the pivotal part as a rotation center. The pole-reversible magnetic element and the first magnetic element interact with each other. Consequently, the second magnetic element is close to or away from the magnetization member.

In an embodiment, the magnetization member has a gear structure. The gear structure includes plural tooth tips and plural tooth roots, which are alternately arranged in a radial direction. When the second magnetic element is away from the magnetization member, the scroll wheel is rotated in a smooth scrolling mode. When the second magnetic element is close to the magnetization member, a magnetic attraction force between the second magnetic element and the plural tooth tips of the magnetization member is larger than a magnetic attraction force between the second magnetic element and the plural tooth roots of the magnetization member, so that the scroll wheel is rotated in a step scrolling mode.

In an embodiment, the second magnetic element includes a first magnet, a second magnet and a third magnet. The second magnet is stacked on a top side of the first magnet. The third magnet is stacked on a bottom side of the first magnet. An S-pole terminal and an N-pole terminal of the first magnet are arranged along a horizontal direction. The S-pole terminal of the first magnet is close to a tooth tip of the plural tooth tips of the magnetization member. An S-pole terminal and an N-pole terminal of the second magnet are arranged along a vertical direction. The S-pole terminal of the second magnet faces the first magnet. An S-pole terminal and an N-pole terminal of the third magnet are arranged along the vertical direction. The S-pole terminal of the third magnet faces the first magnet.

In an embodiment, the second magnetic element includes a first magnet, a second magnet and a third magnet. The second magnet is stacked on a top side of the first magnet. The third magnet is stacked on a bottom side of the first magnet. An S-pole terminal and an N-pole terminal of the first magnet are arranged along a horizontal direction. The N-pole terminal of the first magnet is close to a tooth tip of the plural tooth tips of the magnetization member. An S-pole terminal and an N-pole terminal of the second magnet are arranged along a vertical direction. The N-pole terminal of the second magnet faces the first magnet. The S-pole terminal and the N-pole terminal of the third magnet are arranged along the vertical direction. The N-pole terminal of the third magnet faces the first magnet.

In an embodiment, the magnetization member has an external gear structure. The magnetization member has a central channel. The scroll wheel includes a rotation shaft. An end of the rotation shaft is inserted into and fixed in the central channel. Consequently, the magnetization member is permitted to be synchronously rotated with the scroll wheel.

In an embodiment, the magnetization member has an internal gear structure with an outer ring surface, and the scroll wheel has an inner ring surface. The outer ring surface of the magnetization member is fixed on the inner ring surface of the scroll wheel.

In an embodiment, the magnetization member includes plural magnetization sheets, and the plural magnetization sheets are stacked along an axial direction.

In an embodiment, the magnetization member includes plural magnetization blocks and a circular disc. The plural magnetization blocks are formed on the circular disc and distributed radially. The scroll wheel includes a concave structure. The circular disc is disposed within the concave structure.

In an embodiment, the roller module further includes a supporting seat and a ball bearing. The scroll wheel, the magnetization member and the swinging element are supported by the supporting seat. The supporting seat includes a pivotal shaft. The pivotal part of the swinging element is a shaft bushing. The pivotal part of the swinging element is installed on the pivotal shaft of the supporting seat. The ball bearing is arranged between the shaft bushing of the swinging element and the pivotal shaft of the supporting seat. The ball bearing includes an inner ring part and an outer ring part. The inner ring part is contacted with the pivotal shaft of the supporting seat. The outer ring part is contacted with the shaft bushing of the swinging element.

In an embodiment, a distance between the first magnetic element and the pivotal part is longer than a distance between the second magnetic element and the pivotal part.

In an embodiment, the pole-reversible magnetic element includes a magnetic core and a coil. The coil is wound around the magnetic core. When an electric current flows through the coil, a pole layout of the pole-reversible magnetic element is opposite to a pole layout of the magnetic core.

In an embodiment, the input device is a mouse device, a keyboard, a drawing tablet, a game controller, a video editor or a live broadcast controller.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only. In the following embodiments and drawings, the elements irrelevant to the concepts of the present invention are omitted and not shown.

The present invention provides a roller module and an input device with the roller module. The roller module can be selectively operated in one of a step scrolling mode and a smooth scrolling mode. The structure of the roller module is specially designed. Consequently, during the process of switching the operation mode of the roller module, the possibility of generating unpleasant noises will be reduced, and the user's confidence in the product will be increased. In addition, the switching smoothness is enhanced, the wear problem is reduced, and the power-saving efficacy is enhanced.

The roller module of the present invention can be applied to a variety of input devices. An example of the input device includes but is not limited to a mouse device, a keyboard, a drawing tablet, a game controller, a video editor or a live broadcast controller. The roller module is installed on the input device to generate a scrolling command, a zoom-in command, a zoom-out command, a menu selecting command or any other appropriate command. The input device comprises a casing. A scroll wheel of the roller module is partially exposed outside the casing to be operated by the user. In addition, the input device is equipped with a power supply unit for providing an electric current to the roller module.

A roller module according to a first embodiment of the present invention and an input device with the roller module will be illustrated with reference toFIGS.1to7andFIGS.9to10.

FIG.1is a schematic perspective view illustrating an input device according to a first embodiment of the present invention.FIG.2is a schematic exploded view illustrating the input device shown inFIG.1.FIG.3is a schematic perspective view illustrating the roller module of the input device in a step scrolling mode.FIG.4is a schematic perspective view illustrating the roller module of the input device in a smooth scrolling mode.FIG.5is a schematic exploded view illustrating the roller module shown inFIG.3.FIG.6is a schematic cutaway view illustrating the roller module shown inFIG.3and taken along the line A-A.FIG.7schematically illustrates a first-type pole layout structure about the relationship between the magnetization member and the second magnetic element of the roller module shown inFIG.3.FIG.9is a schematic cutaway view illustrating the roller module shown inFIG.3and taken along the line B-B.FIG.10is a schematic cutaway view illustrating the roller module shown inFIG.4and taken along the line C-C.

Hereinafter, a mouse device is taken as an example of the input device. It is noted that the example of the input device is not restricted.

The input device1comprises a casing2and a roller module3.

In an embodiment, the casing2comprises an upper cover21and a lower cover22. An accommodation space23is formed between the upper cover21and the lower cover22. The roller module3is disposed within the accommodation space23. An opening211is formed in the upper cover21. It is noted that numerous modifications and alterations may be made while retaining the teachings of the invention. In another embodiment, the casing2is composed of other parts, and the number of parts is not restricted. However, after the parts of the casing2are combined together, an accommodation space is defined to accommodate the roller module3.

The roller module3comprises a scroll wheel31, a magnetization member32, a swinging element33, a pole-reversible magnetic element34and a supporting seat35. The scroll wheel31, the magnetization member32, the swinging element33and the pole-reversible magnetic element34are supported by the supporting seat35. The supporting seat35comprises a pivotal shaft351and a receiving structure352. The pivotal shaft351is used for installing the swinging element33. The pole-reversible magnetic element34is installed and fixed within the receiving structure352.

The scroll wheel31is partially exposed outside through the opening211. Consequently, the scroll wheel31can be contacted with and rotated by the user. The magnetization member32is synchronously rotated with the scroll wheel31. In this embodiment, a rotation shaft311is protruded from a rotation center of the scroll wheel31. An end of the rotation shaft311is inserted into and fixed in a central channel321of the magnetization member32. Consequently, the magnetization member32can be synchronously rotated with the scroll wheel31.

In an embodiment, the magnetization member32is made of a high magnetic permeability metal. For example, the magnetization member32is made of silicon steel, pure iron, permalloy (iron-nickel alloy) or any other appropriate material. The magnetization member32has an external gear structure in appearance. The external gear structure comprises plural tooth tips322and plural tooth roots323, which are alternately arranged in the radial direction. In an implementation example, the magnetization member32comprises plural magnetization sheets that are stacked along the axial direction. As shown inFIG.5, the magnetization member32comprises six magnetization sheets32A,32B,32C,32D,32E and32F in a stack arrangement. Since the magnetization member32comprises plural magnetization sheets in the stack arrangement, the eddy current loss can be reduced.

The swinging element33comprises a pivotal part331, a first magnetic element332, a second magnetic element333, a first receiving recess334and a second receiving recess335. The pivotal part331is a shaft bushing. The first receiving recess334is used for accommodating the first magnetic element332. The second receiving recess335is used for accommodating the second magnetic element333. After the first magnetic element332is installed in the first receiving recess334and the second magnetic element333is installed in the second receiving recess335, the first magnetic element332and the second magnetic element333are movable by using the pivotal part331as a rotation center. For example, the first magnetic element332and the second magnetic element333can be rotated in a clockwise direction or a counterclockwise direction. In this embodiment, the first magnetic element332is a permanent magnet.

The pivotal part331of the swinging element33is installed on the pivotal shaft351of the supporting seat35. Since the pivotal part331of the swinging element33is a shaft bushing, the shaft bushing can be sheathed around the pivotal shaft351of the supporting seat35. In this embodiment, the input device1further comprises at least one ball bearing36between the pivotal part331of the swinging element33and the pivotal shaft351of the supporting seat35. Due to the at least one ball bearing36, the abrasion resulted from the contact between the pivotal part331of the swinging element33and the pivotal shaft351of the supporting seat35will be reduced, and the swinging element33can be swung more smoothly with a reduced drag force. Each ball bearing36comprises an inner ring part361and an outer ring part362. The inner ring part361is contacted with the pivotal shaft351of the supporting seat35. The outer ring part362is contacted with the pivotal part331of the swinging element33.

In the above embodiment, the pivotal part331of the swinging element33is a shaft bushing, and the supporting seat35is equipped with the pivotal shaft351corresponding to the shaft bushing. It is noted that numerous modifications and alterations may be made while retaining the teachings of the invention. In another embodiment, the swinging element33is equipped with a pivotal shaft, and the supporting seat35is equipped with a shaft bushing. Moreover, at least one ball bearing is arranged between the pivotal shaft and the shaft bushing.

The pole-reversible magnetic element34is installed and fixed within the receiving structure352. Due to the interaction between the pole-reversible magnetic element34and the first magnetic element332, the pole-reversible magnetic element34and the first magnetic element332are selectively attracted by each other or repelled from each other. Consequently, the second magnetic element333of the swinging element33is close to the magnetization member32or away from the magnetization member32. When the second magnetic element333of the swinging element33is away from the magnetization member32, the scroll wheel31is rotated in a smooth scrolling mode (or a stepless scrolling mode). When the second magnetic element333of the swinging element33is close to the magnetization member32, the magnetic attraction force between the second magnetic element333and the plural tooth tips322of the magnetization member32is larger than the magnetic attraction force between the second magnetic element333and the plural tooth roots323of the magnetization member32. Consequently, the scroll wheel31is rotated in a step scrolling mode (or a ratchet scrolling mode).

Especially, the rotation of the scroll wheel31may provide a step scrolling feel to the user when the second magnetic element333of the swinging element33is close to the magnetization member32. The principles of generating the step scrolling feel will be described as follows. As mentioned above, the second magnetic element333is closer to the tooth tips322of the magnetization member32, and the second magnetic element333is farther away from the plural tooth roots323of the magnetization member32. Since the plural tooth tips322and plural tooth roots323of the magnetization member32are alternately arranged, the magnetic attraction force between the magnetization member32and the nearby second magnetic element333is subjected to sudden change between the high and low levels during the rotation of the scroll wheel31. Consequently, the step scrolling feedback is provided. On the other hand, when the second magnetic element333of the swinging element33is away from the magnetization member32, the magnetic attraction force between the second magnetic element333and the tooth tips322and the magnetic attraction force between the second magnetic element333and the tooth roots323are nearly equal and very weak. Consequently, the rotation of the scroll wheel31will not result in the step scrolling feedback. That is, the step scrolling feel is very weak. Under this circumstance, the scroll wheel31is rotated in the smooth scrolling mode.

In order to increase the magnetic attraction force between the second magnetic element333and the magnetization member32, the pole layout structure is specially designed, and the second magnetic element333comprises at least three magnets.

In the implementation example ofFIG.7, the second magnetic element333comprises a first magnet3331, a second magnet3332and a third magnet3333, which are arranged in a stack form. The second magnet3332is stacked on the top side of the first magnet3331. The third magnet3333is stacked on the bottom side of the first magnet3331. The pole layout structure will be described in more details as follows.

The S-pole terminal and the N-pole terminal of the first magnet3331are arranged along the horizontal direction. In addition, the S-pole terminal of the first magnet3331is close to a tooth tip322of the plural tooth tips322of the magnetization member32. The S-pole terminal and the N-pole terminal of the second magnet3332are arranged along the vertical direction. In addition, the S-pole terminal of the second magnet3332faces the first magnet3331. The S-pole terminal and the N-pole terminal of the third magnet3333are arranged along the vertical direction. In addition, the S-pole terminal of the third magnet3333faces the first magnet3331. Due to the arrangement of the second magnet3332and the third magnet3333, the magnetic attraction force between the tooth tips322of the magnetization member32and the first magnet3331will be strengthened. Consequently, while the scroll wheel31is rotated, a strong step scrolling feel will provide to the user. In an embodiment, the first magnet3331, the second magnet3332and the third magnet3333are permanent magnets.

In some other embodiments, the N-pole terminal of the first magnet3331is close to a tooth tip322of the plural tooth tips322of the magnetization member32. In other words, the pole layout structure is changed.

FIG.8schematically illustrates a second-type pole layout structure about the relationship between the magnetization member and the second magnetic element of the roller module shown inFIG.3. In the implementation example ofFIG.8, the second magnetic element333comprises a first magnet3331, a second magnet3332and a third magnet3333, which are arranged in a stack form. The second magnet3332is stacked on the top side of the first magnet3331. The third magnet3333is stacked on the bottom side of the first magnet3331. The pole layout structure will be described as follows.

The S-pole terminal and the N-pole terminal of the first magnet3331are arranged along the horizontal direction. In addition, the N-pole terminal of the first magnet3331is close to a tooth tip322of the plural tooth tips322of the magnetization member32. The S-pole terminal and the N-pole terminal of the second magnet3332are arranged along the vertical direction. In addition, the N-pole terminal of the second magnet3332faces the first magnet3331. The S-pole terminal and the N-pole terminal of the third magnet3333are arranged along the vertical direction. In addition, the N-pole terminal of the third magnet3333faces the first magnet3331. Due to the arrangement of the second magnet3332and the third magnet3333, the magnetic attraction force between the tooth tips322of the magnetization member32and the first magnet3331will be strengthened.

The pole-reversible magnetic element34comprises a magnetic core341and a coil342. The magnetic core341is made of a magnetic material. By applying an external strong magnetic field to the magnetic material, the magnetic direction of the magnetic field is changed, and a certain residual magnetism is retained. For example, the magnetic core341is an alnico magnet. The coil342is wound around the magnetic core341. When no electric current flows through the coil342or no electric current is provided from the input device1to the coil342, the pole layout of the pole-reversible magnetic element34is determined according to the original pole layout of the magnetic core341. When an electric current flows through the coil342or an electric current is provided from the input device1to the coil342, the magnetic field generated by the coil342is larger than the coercivity of the magnetic core341. Consequently, the pole layout of the pole-reversible magnetic element34is opposite to the pole layout of the magnetic core341. In other words, the poles are reversed.

The input device1further comprises a power supply unit4. The power supply unit4is disposed within the input device1. In addition, the power supply unit4is electrically connected with the pole-reversible magnetic element34to provide the electric current to the coil342. The input device1further comprises a control unit5and a switching button6. The roller module3is switched between the step scrolling mode and the smooth scrolling mode through the control unit5and the switching button6. The switching button6is electrically connected with the control unit5, or the switching button6is in communication with the control unit5. The switching button6is exposed outside the casing2of the input device1so as to be operated by the user. For example, the switching button6is partially exposed outside the input device1through the opening211. After the switching button6is triggered by the user, the pole-reversible magnetic element34and the first magnetic element332interact with each other. Consequently, the scroll wheel31can be switched between the step scrolling mode and the smooth scrolling mode.

Hereinafter, two scenarios of the interaction between the pole-reversible magnetic element34and the first magnetic element332will be described with reference toFIGS.11and12.FIG.11schematically illustrates the repulsive interaction and the separation between the pole-reversible magnetic element and the first magnetic element of the roller module according to the first embodiment of the present invention.FIG.12schematically illustrates the attractive interaction and the approach between the pole-reversible magnetic element and the first magnetic element of the roller module according to the first embodiment of the present invention. In this embodiment, the first magnetic element332comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the first magnetic element332faces the magnetic core341of the pole-reversible magnetic element34. The magnetic core341of the pole-reversible magnetic element34comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332.

Please refer toFIG.11. When no electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is determined according to the original pole layout of the magnetic core341. That is, the S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are separated from each other in response to the magnetic repulsive force therebetween. As shown inFIG.5andFIG.9, the pole-reversible magnetic element34has been installed and fixed within the receiving structure352. Consequently, as shown inFIG.11, the first magnetic element332of the swinging element33is moved in a first rotation direction R1. Correspondingly, the second magnetic element333is also moved in the first rotation direction R1and then moved to the position near the magnetization member32.

Please refer toFIG.12. When an electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is opposite to the pole layout of the magnetic core341. That is, the N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are moved in the direction close to each other in response to the magnetic attraction force therebetween. As shown inFIG.5andFIG.10, the pole-reversible magnetic element34has been installed and fixed within the receiving structure352. Consequently, as shown inFIG.12, the first magnetic element332of the swinging element33is moved in a second rotation direction R2. Correspondingly, the second magnetic element333is also moved in the second rotation direction R2and then moved to the position away from the magnetization member32. The second rotation direction R2is opposite to the first rotation direction R1.

The scenarios of the interaction between the pole-reversible magnetic element34and the first magnetic element332are not restricted. In other words, the scenarios of the interaction between the pole-reversible magnetic element34and the first magnetic element332may be varied according to the practical requirements.

Hereinafter, two other scenarios of the interaction between the pole-reversible magnetic element34and the first magnetic element332will be described with reference toFIGS.13and14.FIG.13schematically illustrates the repulsive interaction and the separation between the pole-reversible magnetic element and the first magnetic element of the roller module according to a first variant example of the first embodiment of the present invention.FIG.14schematically illustrates the attractive interaction and the approach between the pole-reversible magnetic element and the first magnetic element of the roller module according to the first variant example of the first embodiment of the present invention. In this embodiment, the first magnetic element332comprises an S-pole terminal and an N-pole terminal. The N-pole terminal of the first magnetic element332faces the magnetic core341of the pole-reversible magnetic element34. The magnetic core341of the pole-reversible magnetic element34comprises an S-pole terminal and an N-pole terminal. The N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332.

Please refer toFIG.13. When no electric current flows through the coil342of the pole-reversible magnetic element34, the N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are separated from each other in response to the magnetic repulsive force therebetween.

Please refer toFIG.14. When an electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is reversed. That is, the S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are moved in the direction close to each other in response to the magnetic attraction force therebetween.

In some other variant examples shown inFIGS.15to18, the relative locations of the first magnetic element332and the pole-reversible magnetic element34are exchanged with each other. For example, the location of the receiving structure352of the supporting seat35for accommodating the pole-reversible magnetic element34is adjusted. In these variant examples, the pole-reversible magnetic element34is located beside another side of the first magnetic element332. Correspondingly, the opening side of the first receiving recess334of the swinging element33for accommodating the first magnetic element332is adjusted.

FIG.15schematically illustrates the repulsive interaction and the separation between the pole-reversible magnetic element and the first magnetic element of the roller module according to a second variant example of the first embodiment of the present invention.FIG.16schematically illustrates the attractive interaction and the approach between the pole-reversible magnetic element and the first magnetic element of the roller module according to the second variant example of the second embodiment of the present invention. In the variant example ofFIGS.15and16, the locations of the first magnetic element332and the pole-reversible magnetic element34are exchanged with each other. In this embodiment, the first magnetic element332comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the first magnetic element332faces the magnetic core341of the pole-reversible magnetic element34. The magnetic core341of the pole-reversible magnetic element34comprises an S-pole terminal and an N-pole terminal. The N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332.

Please refer toFIG.15. When no electric current flows through the coil342of the pole-reversible magnetic element34, the N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are moved in the direction close to each other in response to the magnetic attraction force therebetween.

Please refer toFIG.16. When an electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is reversed. That is, the S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are separated from each other in response to the magnetic repulsive force therebetween.

FIG.17schematically illustrates the repulsive interaction and the separation between the pole-reversible magnetic element and the first magnetic element of the roller module according to a third variant example of the first embodiment of the present invention.FIG.18schematically illustrates the attractive interaction and the approach between the pole-reversible magnetic element and the first magnetic element of the roller module according to the third variant example of the second embodiment of the present invention. In the variant example ofFIGS.17and18, the first magnetic element332comprises an S-pole terminal and an N-pole terminal. The N-pole terminal of the first magnetic element332faces the magnetic core341of the pole-reversible magnetic element34. The magnetic core341of the pole-reversible magnetic element34comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332.

Please refer toFIG.17. When no electric current flows through the coil342of the pole-reversible magnetic element34, the S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are moved in the direction close to each other in response to the magnetic attraction force therebetween.

Please refer toFIG.18. When an electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is reversed. That is, the N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are separated from each other in response to the magnetic repulsive force therebetween.

In some embodiments, the structure of the swinging element33is modified. For example, the distance between the first magnetic element332and the pivotal part331is longer than the distance between the second magnetic element333and the pivotal part331. Consequently, when the pole-reversible magnetic element34and the first magnetic element332interact with each other, it is easier to push the second magnetic element333toward the magnetization member32or separate the magnetization member32and the second magnetic element333from each other. Since the torques corresponding to different distances are different, the scroll wheel31can be switched between the step scrolling mode and the smooth scrolling mode with small electricity quantity. Consequently, the power-saving efficacy is enhanced.

When the operating mode of the scroll wheel31is switched to the step scrolling mode or the smooth scrolling mode, the collision between the swinging element33and the supporting seat35may generate noises. For reducing the influence of the collision, reducing the generated noise and increasing the user's confidence in the product, the roller module3further comprises a buffering structure37between the supporting seat35and the swinging element33. For example, the buffering structure37is made of foam or silicone. In addition, the buffering structure37is installed on the supporting seat35or the swinging element33. As long as the supporting seat35and the swinging element33are not in direct contact with each other, the installation locations of the supporting seat35and the swinging element33are not restricted.

Similarly, when the pole-reversible magnetic element34and the first magnetic element332are magnetically attracted by each other in response to the magnetic attraction force, the collision between the pole-reversible magnetic element34and the first magnetic element332may generate noises. For reducing the influence of the collision, reducing the generated noise and increasing the user's confidence in the product, the roller module3further comprises a buffering structure38between the pole-reversible magnetic element34and the first magnetic element332. For example, the buffering structure38is installed on an outer surface of the first receiving recess334of the swinging element33, installed on the exposed part of the first magnetic element332or installed on an outer surface of the receiving structure352of the supporting seat35.

In the first embodiment, the magnetization member32is installed on the rotation shaft311of the scroll wheel31. In addition, there is a spacing interval between the magnetization member32and the rotation shaft311of the scroll wheel31. In some other embodiments, the magnetization member32is directly installed in the inner space of the scroll wheel31. Due to this structural design, the magnetization member32and the scroll wheel31can be also synchronously rotated with each other.

A roller module according to a second embodiment of the present invention and an input device with the roller module will be illustrated with reference toFIGS.19to23.FIG.19is a schematic perspective view illustrating a roller module according to a second embodiment of the present invention.FIG.20is a schematic exploded view illustrating the roller module shown inFIG.19.FIG.21schematically illustrates the repulsive interaction and the separation between the pole-reversible magnetic element and the first magnetic element of the roller module shown inFIG.19.FIG.22schematically illustrates the attractive interaction and the approach between the pole-reversible magnetic element and the first magnetic element of the roller module shown inFIG.19.FIG.23is a schematic cutaway view illustrating the roller module shown inFIG.19and taken along the line D-D. In comparison with the first embodiment, the installation of the magnetization member32of this embodiment is distinguished. In this embodiment, the magnetization member32is directly installed in the inner space of the scroll wheel31. In addition, the second magnetic element333of the swinging element33is inserted into the inner space of the scroll wheel31. Consequently, the second magnetic element333of the swinging element33and the magnetization member32can interact with each other.

In this embodiment, the scroll wheel31comprises a concave structure312. The concave structure312is defined by an inner ring surface313and an inner wall314collaboratively.

In this embodiment, the magnetization member32has an internal gear structure in appearance. The external gear structure comprises plural tooth tips322and plural tooth roots323, which are alternately arranged in the radial direction. The magnetization member32has an outer ring surface324. When the magnetization member32is disposed within the scroll wheel31, the outer ring surface324of the magnetization member32is fixed on the inner ring surface313of the scroll wheel31.

In an implementation example, the magnetization member32is a one-piece structure. Alternatively, the magnetization member32comprises plural magnetization sheets that are stacked along the axial direction.

In this embodiment, the swinging element33comprises a bent structure336. The second receiving recess335is formed in the bent structure336. The second receiving recess335is used for accommodating the second magnetic element333. In addition, the second receiving recess335is open to the magnetization member32in the radial direction.

Of course, the scenarios of the interaction between the first magnetic element332and the pole-reversible magnetic element34shown inFIGS.13to18may be applied to the roller module3of this embodiment.

Please refer toFIGS.21and22. In this embodiment, the first magnetic element332comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the first magnetic element332faces the magnetic core341of the pole-reversible magnetic element34. The magnetic core341of the pole-reversible magnetic element34comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332.

When no electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is determined according to the original pole layout of the magnetic core341. That is, the S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are separated from each other in response to the repulsive force therebetween. Consequently, as shown inFIG.21, the first magnetic element332of the swinging element33is moved in a first rotation direction R1. Correspondingly, the second magnetic element333on the bent structure336is moved in the first rotation direction R1, then inserted into the concave structure312of the scroll wheel31, and finally moved to the position near the magnetization member32.

When an electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is opposite to the pole layout of the magnetic core341. That is, the N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are moved in the direction close to each other in response to the magnetic attraction force therebetween. Consequently, as shown inFIG.22, the first magnetic element332of the swinging element33is moved in a second rotation direction R2. Correspondingly, the second magnetic element333on the bent structure336is also moved in the second rotation direction R2and then moved to the position away from the magnetization member32. The second rotation direction R2is opposite to the first rotation direction R1.

In order to increase the magnetic attraction force between the second magnetic element333and the magnetization member32, the pole layout structure is specially designed. Like the first embodiment ofFIG.8, the second magnetic element333comprises at least three magnets. The pole layout structure is similar to that ofFIG.8.

A roller module according to a third embodiment of the present invention and an input device with the roller module will be illustrated with reference toFIGS.24to28.

FIG.24is a schematic perspective view illustrating a roller module according to a third embodiment of the present invention.FIG.25is a schematic exploded view illustrating the roller module shown inFIG.24.FIG.26schematically illustrates the repulsive interaction and the separation between the pole-reversible magnetic element and the first magnetic element of the roller module shown inFIG.24.FIG.27schematically illustrates the attractive interaction and the approach between the pole-reversible magnetic element and the first magnetic element of the roller module shown inFIG.24.FIG.28is a schematic cutaway view illustrating the roller module shown inFIG.24and taken along the line E-E. In comparison with the first embodiment, the installation of the magnetization member32of this embodiment is distinguished. In this embodiment, the magnetization member32is directly installed in the inner space of the scroll wheel31. Due to this structural design, the magnetization member32and the scroll wheel31can be also synchronously rotated with each other.

In this embodiment, the scroll wheel31comprises a concave structure312. The concave structure312is defined by an inner ring surface313and an inner wall314collaboratively.

In this embodiment, the magnetization member32comprises plural magnetization blocks325and a circular disc326. The plural magnetization blocks325are formed on the circular disc326and distributed radially. When the magnetization member32is disposed within the scroll wheel31, the circular disc326of the magnetization member32is disposed within the concave structure312and fixed on the inner wall314of the scroll wheel31.

In this embodiment, the swinging element33comprises a bent structure336. The second receiving recess335is formed in the bent structure336. The second receiving recess335is used for accommodating the second magnetic element333. In addition, the second receiving recess335is open to the magnetization member32in the radial direction.

Of course, the scenarios of the interaction between the first magnetic element332and the pole-reversible magnetic element34shown inFIGS.13to18may be applied to the roller module3of this embodiment.

Please refer toFIGS.26and27. In this embodiment, the first magnetic element332comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the first magnetic element332faces the magnetic core341of the pole-reversible magnetic element34. The magnetic core341of the pole-reversible magnetic element34comprises an S-pole terminal and an N-pole terminal. The S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332.

When no electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is determined according to the original pole layout of the magnetic core341. That is, the S-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are separated from each other in response to the repulsive force therebetween. Consequently, as shown inFIG.26, the first magnetic element332of the swinging element33is moved in a first rotation direction R1. Correspondingly, the second magnetic element333on the bent structure336is moved in the first rotation direction R1, and then moved to the position near the magnetization member32.

When an electric current flows through the coil342of the pole-reversible magnetic element34, the pole layout of the pole-reversible magnetic element34is opposite to the pole layout of the magnetic core341. That is, the N-pole terminal of the pole-reversible magnetic element34faces the first magnetic element332. Under this circumstance, the pole-reversible magnetic element34and the first magnetic element332are moved in the direction close to each other in response to the magnetic attraction force therebetween. Consequently, as shown inFIG.27, the first magnetic element332of the swinging element33is moved in a second rotation direction R2. Correspondingly, the second magnetic element333on the bent structure336is also moved in the second rotation direction R2and then moved to the position away from the magnetization member32. The second rotation direction R2is opposite to the first rotation direction R1.

In order to increase the magnetic attraction force between the second magnetic element333and the magnetization member32, the pole layout structure is specially designed. Like the first embodiment ofFIG.8, the second magnetic element333comprises at least three magnets. The pole layout structure is similar to that ofFIG.8.