Mouse and roller assembly thereof

Abstract

The utility model discloses a mouse and an idler wheel assembly thereof. The idler wheel assembly comprises a base body, an idler wheel, a permanent magnet, a magnetic sensor, a first magnetic part and a second magnetic part. The roller is rotatably arranged on the base body around the central axis of the roller; the permanent magnet is fixedly arranged on the roller, the magnetic sensor is fixedly arranged on the base body, and the magnetic sensor is configured to detect rotation of the permanent magnet; the first magnetic part is fixedly arranged on the base body, the second magnetic part is fixedly arranged on the roller, the first magnetic part is provided with a plurality of first magnetic parts distributed around the central axis, the second magnetic part is provided with a plurality of second magnetic parts distributed around the central axis, and the first magnetic parts and the second magnetic parts are distributed at intervals along the central axis; and when the second magnetic part rotates along with the roller, the first magnetic part and the second magnetic part generate periodic magnetic action. The roller assembly has a one-key shuttle flying function, and has a segmented hand feeling when being used.

Description

TECHNICAL FIELD

[0001] The utility model relates to mouse scroll wheel technical field especially, it is a kind of mouse and its scroll wheel subassembly. BACKGROUND

[0002] The realization principle of mouse scroll wheel on market, basically is the detection of scroll wheel using the way of mechanical coding, also have part high-end product using the detection of scroll wheel using the way of photoelectric coding or magnetic coding.

[0003] Reference the utility model with the name of a kind of magnetorheological damping pole speed optical wheel and mouse (referred to as "comparative document") with the publication number CN221149300U Figure 2 、 3 , and the content of specification paragraph

[0034] : further, as shown in Figure 2 And Figure 3 , scroll wheel includes magnetic inner shaft 222 and magnetic outer shaft 223, magnetic inner shaft 222 and magnetic outer shaft 223 are arranged in the inside of support 22 by metal shaft 221, magnetic outer shaft 223 rotates around the outer periphery of magnetic inner shaft 222, the surface of magnetic inner shaft 222 is uniformly arrayed with first magnetic tooth 2221, the inside of magnetic outer shaft 223 is correspondingly provided with second magnetic tooth 2231 with first magnetic tooth 2221, light hole 2232 is arranged between adjacent second magnetic tooth 2231, and light hole 2232 penetrates magnetic outer shaft 223.Magnetic inner shaft 222 and magnetic outer shaft 223 all have magnetic field, first magnetic tooth 2221 on magnetic inner shaft 222 protrudes towards magnetic outer shaft 223, second magnetic tooth 2231 on the inner wall of magnetic outer shaft 223 protrudes towards magnetic inner shaft 222, first magnetic tooth 2221 and second magnetic tooth 2231 are uniformly arrayed, and one-to-one correspondence in natural state, in the process that shaft sleeve 2233 drives magnetic outer shaft 223 to rotate, when first magnetic tooth 2221 corresponds with second magnetic tooth 2231, the suction force between the two is strongest, with first magnetic tooth 2221 and second magnetic tooth 2231 misaligned, suction force gradually weakens, and then suction force strengthens again, so that paragraph feeling can be generated when using, since first magnetic tooth 2221 and second magnetic tooth 2231 do not have mechanical contact, paragraph feeling is realized completely by relying on the suction force between them, so that it is smooth without mechanical encoder, and it is not too mechanical.

[0004] The magnetic inner shaft 222 and magnetic outer shaft 223 of the comparative document are radially distributed, so for the magnetic inner shaft 222 and magnetic outer shaft 223 of certain structure, only scroll wheel with paragraph hand feeling intensity determined can be produced. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of mouse and its scroll wheel subassembly.

[0006] To achieve the above object, the utility model provides a technical scheme for: providing a roller assembly, including

[0007] The base body, the roller, the permanent magnet, the magnetic sensor, the first magnetic force piece and the second magnetic force piece;

[0008] The roller is rotatably arranged on the base body around the central axis;

[0009] The permanent magnet is fixed on the roller, the magnetic sensor is fixed on the base body, and the magnetic sensor is configured to detect the rotation of the permanent magnet;

[0010] The first magnetic force piece is fixed on the base body, the second magnetic force piece is fixed on the roller, the first magnetic force piece has a plurality of first magnetic force parts distributed around the central axis, the second magnetic force piece has a plurality of second magnetic force parts distributed around the central axis, and the first magnetic force parts and the second magnetic force parts are spaced along the central axis;

[0011] When the second magnetic force piece rotates with the roller, the first magnetic force parts and the second magnetic force parts generate periodic magnetic force action.

[0012] The first magnetic force piece has a first surface facing the second magnetic force piece, and the first magnetic force parts are exposed to the first surface;

[0013] The second magnetic force piece has a second surface facing the first magnetic force piece, and the second magnetic force parts are exposed to the second surface.

[0014] The number of first magnetic force parts is the same as the number of second magnetic force parts.

[0015] The main body of the first magnetic force piece is disc-shaped, and the first surface is the circular end surface of the first magnetic force piece;

[0016] The main body of the second magnetic force piece is disc-shaped, and the second surface is the circular end surface of the second magnetic force piece.

[0017] The roller is provided with a mounting groove, and the first magnetic force piece and the second magnetic force piece are located in the mounting groove.

[0018] Further comprising a main circuit board, the main circuit board is fixed on the base body, and the magnetic sensor is directly fixed on the main circuit board.

[0019] The base body further comprises a first support table and a second support table spaced along the central axis;

[0020] The roller is arranged with a shaft core extending along the central axis, the roller is located between the first support platform and the second support platform, and the shaft core is carried on the first support platform and the second support platform through two ends thereof respectively.

[0021] Part of the first magnetic force part and the second magnetic force part is a magnetic pole, and the other part is a magnetic conducting part; or

[0022] The first magnetic force part and the second magnetic force part are all magnetic poles, the magnetic poles of each first magnetic force part and each second magnetic force part are all the same, or the magnetic poles of each first magnetic force part and each second magnetic force part are all opposite, or a plurality of the first magnetic force parts are a plurality of south poles and north poles alternately distributed along the circumference of the roller, and a plurality of the second magnetic force parts are a plurality of south poles and north poles alternately distributed along the circumference of the roller.

[0023] The first magnetic force part is a multi-pole magnetic ring, and the first magnetic force part corresponds to a magnetic pole of the first magnetic force part;

[0024] The second magnetic force part is a multi-pole magnetic ring, and the second magnetic force part corresponds to a magnetic pole of the second magnetic force part.

[0025] Further comprising a magnetic shielding part, the magnetic shielding part is blocked between the second magnetic force part and the permanent magnet; and the magnetic shielding part is also blocked between the second magnetic force part and the magnetic sensor.

[0026] In a second aspect, the utility model provides a technical scheme: the utility model further provides a mouse, the mouse includes the roller assembly.

[0027] Compared with the prior art, since the permanent magnet is fixed on the roller, the magnetic sensor is fixed on the base, the magnetic sensor is configured to detect the rotation of the permanent magnet, the first magnetic force piece has a plurality of first magnetic force parts distributed around the center axis, the second magnetic force piece has a plurality of second magnetic force parts distributed around the center axis, and the first magnetic force parts and the second magnetic force parts are spaced along the center axis; when the second magnetic force piece follows the rotation of the roller, the first magnetic force parts and the second magnetic force parts generate periodic magnetic force action. Since the first magnetic force piece has a plurality of first magnetic force parts distributed around the center axis, the second magnetic force piece has a plurality of second magnetic force parts distributed around the center axis, therefore, when the second magnetic force piece follows the rotation of the roller, the first magnetic force parts and the second magnetic force parts generate periodic magnetic attraction / repulsion magnetic force action. In addition, in the process of producing the roller assembly of the utility model, the first magnetic force piece and the second magnetic force piece determined by the same batch of structures can be installed at different intervals to produce a plurality of roller assemblies and mice with different paragraph hand feeling strengths, which on the one hand is beneficial to improving the universality of parts between different performance roller assemblies, reducing production cost through mass production of parts, and on the other hand is convenient for users to select a mouse with a roller paragraph hand feeling strength suitable for themselves according to personal preferences, and is beneficial to meet the individual needs of different users.

[0028] In addition, since the permanent magnet is fixed on the roller and the magnetic sensor is fixed on the main circuit board, a large distance is often formed between the permanent magnet and the magnetic sensor, so a relatively large permanent magnet is needed to generate a relatively strong magnetic field that can be detected by the magnetic sensor, and the large permanent magnet increases the weight of the roller and increases the inertia of the roller, thereby prolonging the free rotation time of the roller when the user rotates the roller and improving the one-key shuttle effect of the roller.

[0029] The utility model will become more clear through the following description and combining with the drawings, these drawings are used to explain the embodiment of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the schematic diagram of one embodiment of the utility model roller assembly.

[0031] Figure 2 As shown in Figure 1 It is the view of the first magnetic force piece and the second magnetic force piece assembly of the roller assembly.

[0032] Figure 3 It is the explosion view of the first magnetic force piece and the second magnetic force piece. Figure 1 .

[0033] Figure 4An exploded view of the first magnetic force member and the second magnetic force member is shown Figure 2 . DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0035] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] With reference to Figures 1 to 4 , the embodiments of the present application provide a roller assembly 100, comprising:

[0037] a base body 1, a roller 2, a permanent magnet 3, a magnetic sensor 4, a first magnetic force member 5 and a second magnetic force member 6;

[0038] The roller 2 is rotatably arranged on the base body 1 about a central axis 7 thereof;

[0039] The permanent magnet 3 is fixedly arranged on the roller 2, and the magnetic sensor 4 is fixedly arranged on the base body 1. The magnetic sensor 4 is configured to detect rotation of the permanent magnet 3.

[0040] The first magnetic force member 5 is fixedly arranged on the base body 1, and the second magnetic force member 6 is fixedly arranged on the roller 2. The first magnetic force member 5 has a plurality of first magnetic force portions 51 distributed about the central axis 7, and the second magnetic force member 6 has a plurality of second magnetic force portions 61 distributed about the central axis 7. The first magnetic force portions 51 and the second magnetic force portions 61 are spaced apart along the central axis 7.

[0041] When the second magnetic force member 6 rotates with the roller 2, the first magnetic force portions 51 and the second magnetic force portions 61 generate periodic magnetic force action.

[0042] With reference to Figure 1The permanent magnet 3 is disc-shaped and fixed on the roller 2, and rotates coaxially and synchronously with the roller 2. Generally, the permanent magnet 3 is usually made of an alloy material structure including one of iron, cobalt and nickel, and has a relatively large weight ratio relative to the roller 2 when fixed on the roller 2. Therefore, when the user rotates the roller 2, the rotational inertia of the permanent magnet 3 can be fully utilized, so that the roller 2 rotates more smoothly, and the one-key fly shuttle effect of the roller 2 is stronger.

[0043] The one-key fly shuttle is understood as follows: the roller with the one-key fly shuttle function can freely rotate at a relatively fast speed after being once operated by the user, and can continuously rotate for a relatively long time without the aid of external force. This design can improve the efficiency of browsing web pages, documents, game interfaces or other operations requiring fast scrolling.

[0044] Referring to Figure 1 and 2 The first magnetic force piece 5 has a first surface 5a facing the second magnetic force piece 6, and the first magnetic force part 51 is exposed to the first surface 5a.

[0045] The second magnetic force piece 6 has a second surface 6a facing the first magnetic force piece 5, and the second magnetic force part 61 is exposed to the second surface 6a.

[0046] In this embodiment, a plurality of first magnetic force parts 51 distributed around the center axis 7 are exposed to the first surface 5a, and a plurality of second magnetic force parts 61 distributed around the center axis 7 are exposed to the second surface 6a. The first surface 5a and the second surface 6a are arranged to face each other, and during rotation of the second surface 6a relative to the first surface 5a, the first magnetic force part 51 and the second magnetic force part 61 generate periodic magnetic force action. The magnetic force action can be magnetic attraction or magnetic repulsion. Specifically, it usually includes the following cases: each of the plurality of first magnetic force parts 51 and the plurality of second magnetic force parts 61 is magnetic attraction; or each of the plurality of first magnetic force parts 51 and the plurality of second magnetic force parts 61 is magnetic repulsion; or a part of the plurality of first magnetic force parts 51 and a part of the plurality of second magnetic force parts 61 are magnetic attraction, and another part of the plurality of first magnetic force parts 51 and another part of the plurality of second magnetic force parts 61 are magnetic repulsion.

[0047] Referring to Figure 2 and 3 The first magnetic force piece 5 is adjustably fixed to the base body 1 along the extension direction of the center axis 7; and / or

[0048] The second magnetic force member 6 is adjustably fixed to the roller 2 along the extension direction of the central axis 7.

[0049] Specifically, the first magnetic force member 5 is mounted on the base body 1 through a screw-nut pair to adjust the position of the first magnetic force member 5 along the extension direction of the central axis 7 relative to the base body 1; and / or

[0050] The second magnetic force member 6 is mounted on the roller 2 through a screw-nut pair to adjust the position of the second magnetic force member 6 along the extension direction of the central axis 7 relative to the base body 1.

[0051] It is not difficult to understand that the first magnetic force member 5 and the second magnetic force member 6 can both be provided with a screw-nut pair, or one of them is provided with a screw-nut pair. Since the shaft core 8 is arranged along the central axis 7 in the same direction as the screw, in order to make the structure simpler, the shaft core 8 is arranged as a screw, and the first magnetic force member 5 and the second magnetic force member 6 are provided with a screw-nut pair, and the screw and the screw-nut pair are screw-connected. Since the distance between the first magnetic force member 5 and the second magnetic force member 6 can be adjusted by adjusting the distance between the first magnetic force member 5 and the second magnetic force member 6, the size of the magnetic force between the first magnetic force member 5 and the second magnetic force member 6 can be adjusted. Therefore, without changing the structure of the first magnetic force member 5 and the second magnetic force member 6, the distance between the first magnetic force member 5 and the second magnetic force member 6 can be flexibly adjusted through the screw-nut pair, the size of the magnetic force between the first magnetic force member 5 and the second magnetic force member 6 can be adjusted, and the paragraph hand feeling intensity effect can be adjusted.

[0052] Reference Figure 3 , 4 The number of the first magnetic force members 51 is the same as the number of the second magnetic force members 61. In this way, a more delicate and symmetrical paragraph hand feeling effect can be experienced.

[0053] Reference Figure 3 , 4 The main body of the first magnetic force member 5 is disc-shaped, and the first face 5a is a circular end face of the first magnetic force member 5.

[0054] The main body of the second magnetic force member 6 is disc-shaped, and the second face 6a is a circular end face of the second magnetic force member 6.

[0055] The first magnetic force member 5 and the second magnetic force member 6 are both disc-shaped, and the first face 5a and the second face 6a are both circular end faces. In specific applications, the first magnetic force member 5 and the second magnetic force member 6 can be disc-shaped parts with the same structure. In this way, the installation is convenient, and the structure is more compact.

[0056] Reference Figure 1 ,2 The first magnetic force piece 5 and the second magnetic force piece 6 are both located in the installation groove.

[0057] The first magnetic force piece 5 and the second magnetic force piece 6 are both disc-shaped, and the installation groove 21 is a circular groove, so the first magnetic force piece 5 and the second magnetic force piece 6 can be closely matched with the installation groove 21. The installation groove 21 can be a through groove with openings on both sides or a blind groove with an opening on one side. In the embodiment shown in Figure 1 、 2 , the installation groove 21 is a through groove, and when the first magnetic force piece 5 and the second magnetic force piece 6 are assembled in the installation groove 21, they are respectively located on both sides of the installation groove 21.

[0058] Referring to Figure 1 , it also includes a main circuit board 20, which is fixedly arranged on the base body 1, the main body of the roller 2 is located on the upper side of the main circuit board 20, and the central axis 7 of the roller 2 is parallel to the main circuit board 20, and the magnetic sensor 4 is directly fixed on the main circuit board 20.

[0059] It should be noted that the magnetic sensor 4 is not designed as usual: first fixed on an additional circuit board to detect the shaft of the permanent magnet 3, and the additional circuit board is electrically connected with the main circuit board 20. In the embodiment, the magnetic sensor 4 is directly fixed on the main circuit board 20, and the position of the magnetic sensor 4 is more flexible, and in addition, the circuit structure is also simpler and more reliable.

[0060] Referring to Figure 1 and 2 , the base body 1 further includes a first support table 12 and a second support table 13 which are spaced apart along the central axis 7;

[0061] The roller 2 is provided with a shaft core 8 extending along the central axis 7, and the roller 2 is located between the first support table 12 and the second support table 13, and is carried by the first support table 12 and the second support table 13 through the two ends of the shaft core 8.

[0062] The first support table 12 and the second support table 13 are protruded on the base body 1 and can be arranged as an integral structure with the base body 1, the first magnetic force piece 5 further has a circular shaft 52 extending along the central axis 7, and the circular shaft 52 is further provided with a positioning pin 521, the first support table 12 is provided with a U-shaped groove 121 suitable for carrying the circular shaft 52, and the U-shaped groove is further provided with a positioning pin groove 1212, the first magnetic force piece 5 is carried on the U-shaped groove 121 through the circular shaft 52, and the positioning pin 521 enters the positioning pin groove 1212 for positioning.

[0063] More specifically, the positioning pin 521 is an integral structure with the round shaft 52 and is located at the lower side of the round shaft 52, the positioning pin groove 1212 is arranged at the groove bottom of the U-shaped groove 121, and the positioning pin 521 is just inserted into the positioning pin groove 1212, and the two are tightly matched so that the first magnetic force piece 5 is fixed to the first support table 12, and the first magnetic force piece 5 cannot roll with the roller 2.

[0064] Reference Figure 3 And 4 The first magnetic force part 51 and the second magnetic force part 61 are magnetic poles, and the other part is a magnetic conducting part:

[0065] Specifically, the plurality of first magnetic force parts 51 are magnetic poles, and the plurality of second magnetic force parts 61 are magnetic conducting parts.

[0066] Understandably, since the first magnetic force part 51 is a magnetic pole and the second magnetic force part 61 is a magnetic conducting part, no matter whether the first magnetic force part 51 is a north pole or a south pole, a magnetic force will be generated with the second magnetic force part 61.

[0067] It should be noted that in addition to the present embodiment, the plurality of first magnetic force parts and the plurality of second magnetic force parts can also be the following embodiments:

[0068] In one embodiment, the plurality of first magnetic force parts are magnetic conducting parts, and the plurality of second magnetic force parts are magnetic poles.

[0069] Understandably, no matter whether the second magnetic force part is a north pole or a south pole, a magnetic force will be generated with the first magnetic force part.

[0070] In one embodiment, the plurality of first magnetic force parts are magnetic poles, and the plurality of second magnetic force parts are magnetic poles.

[0071] Understandably, when the first magnetic force part is a magnetic pole, the polarity of the first magnetic force part and the second magnetic force part can be opposite or the same, for example, when the polarity of the first magnetic force part and the second magnetic force part is opposite, the two exhibit attractive magnetic force, and when the polarity of the first magnetic force part and the second magnetic force part is the same, the two exhibit repulsive magnetic force; for example, when the first magnetic force part is a magnetic conducting part, the polarity of the second magnetic force part can be a north pole or a south pole and both exhibit attractive magnetic force.

[0072] In one embodiment, the plurality of first magnetic force parts are magnetic poles, and the plurality of second magnetic force parts are magnetic poles.

[0073] It can be understood that when the second magnetic force part is a magnetic pole, the polarity of the first magnetic force part and the second magnetic force part can be opposite or the same, for example, when the polarity of the first magnetic force part and the second magnetic force part is opposite, the two show attractive magnetic force; when the polarity of the first magnetic force part and the second magnetic force part is the same, the two show repulsive magnetic force; when the second magnetic force part is a magnetic conductive part, the polarity of the first magnetic force part can be a north pole or a south pole, and both show attractive magnetic force.

[0074] In one embodiment, among the plurality of first magnetic force parts, a part is a magnetic pole and another part is a magnetic conductive part, and among the plurality of second magnetic force parts, a part is a magnetic pole and another part is a magnetic conductive part.

[0075] It can be understood that when the first magnetic force part and the second magnetic force part, one is a magnetic pole and the other is a magnetic conductive part, the two show attractive magnetic force; when the first magnetic force part and the second magnetic force part are both magnetic poles, if the polarity of the two is opposite, the two show attractive magnetic force, and if the polarity of the two is the same, the two show repulsive magnetic force.

[0076] In the above several embodiments, the magnetic pole can be a south pole or a north pole, and the magnetic conductive part is a material that can be magnetized, for example, an alloy material of one of iron, cobalt and nickel.

[0077] In one embodiment, the first magnetic force part and the second magnetic force part are both magnetic poles, the magnetic poles of each first magnetic force part and each second magnetic force part are the same, or the magnetic poles of each first magnetic force part and each second magnetic force part are opposite, or the plurality of first magnetic force parts are a plurality of south poles and north poles alternately distributed along the circumference of the roller, and the plurality of second magnetic force parts are a plurality of south poles and north poles alternately distributed along the circumference of the roller.

[0078] It can be understood that when the magnetic poles of the first magnetic force part and the second magnetic force part are the same, the first magnetic force part and the second magnetic force part generate periodic magnetic force, which specifically shows periodic repulsion.

[0079] It can be understood that when the magnetic poles of the first magnetic force part and each second magnetic force part are opposite, the first magnetic force part and the second magnetic force part generate periodic magnetic force, which specifically shows periodic attraction.

[0080] It can be understood that when the plurality of first magnetic force parts are a plurality of south poles and north poles alternately distributed along the circumference of the roller, and the plurality of second magnetic force parts are a plurality of south poles and north poles alternately distributed along the circumference of the roller, it specifically shows that there are both periodic attractive magnetic force and periodic repulsive magnetic force.

[0081] In one embodiment, with reference to Figure 3 and4 The first magnetic force member is a multi-pole magnetic ring, and the first magnetic force portion corresponds to a magnetic pole of the first magnetic force member.

[0082] The second magnetic force member is a multi-pole magnetic ring, and the second magnetic force portion corresponds to a magnetic pole of the second magnetic force member.

[0083] In the embodiment, the first magnetic force member and the second magnetic force member are both multi-pole magnetic rings. The multi-pole magnetic ring has the feature that there are many magnetic poles on the magnet of the integral structure. The magnetization of the many magnetic poles is usually realized by using a professional magnetizing device. The use of the multi-pole magnetic ring can make the assembly simpler and more efficient, and the structure more reliable and the service life longer. More specifically, the main body of the multi-pole magnetic ring can be made of rubber material, and the magnetic poles are formed by mixing magnetized magnetic powder in a specific area. In this way, the overall weight can be reduced.

[0084] In one embodiment, Figure 3 、 4 As shown in FIG. 9, the magnetic shielding member 9 is arranged between the second magnetic force member 6 and the permanent magnet 3, and also arranged between the second magnetic force member 6 and the magnetic sensor 4.

[0085] In the embodiment, the magnetic shielding member 9 is made of a magnetic conductive material, and there is a gap between the magnetic shielding member 9 and the second magnetic force member 6 or a non-magnetic conductive material structure part is arranged therebetween, so that the magnetic shielding member 9 has a good magnetic shielding effect. Therefore, by arranging the magnetic shielding member 9, the magnetic field generated by the second magnetic force member 6 can not pass through the magnetic shielding member as much as possible. More specifically, the magnetic shielding member 9 shields the magnetic field generated by the second magnetic force member 6 at the magnetic sensor 4 as much as possible. In this way, the magnetic sensor 4 only detects the magnetic field of the permanent magnet 3 and is not affected by the second magnetic force member 6.

[0086] The utility model embodiment further provides a mouse, the mouse includes the scroll wheel assembly 100.

[0087] The above disclosure is only the preferred embodiment of the utility model, of course, cannot limit the utility model right scope with this, therefore, the equivalent change made by the utility model patent range still belongs to the range covered by the utility model.

Claims

1. A scroll wheel assembly for a mouse, comprising: Comprise: a base, a roller, a permanent magnet, a magnetic sensor, a first magnetic force piece and a second magnetic force piece; the roller is rotatably arranged on the base along a central axis thereof; the permanent magnet is fixedly arranged on the roller, the magnetic sensor is fixedly arranged on the base, and the magnetic sensor is configured to detect rotation of the permanent magnet; the first magnetic force piece is adjustably fixedly arranged on the base, and / or the second magnetic force piece is adjustably fixedly arranged on the roller; the first magnetic force piece has a plurality of first magnetic force portions distributed around the central axis, the second magnetic force piece has a plurality of second magnetic force portions distributed around the central axis, and the first magnetic force portions and the second magnetic force portions are spaced along the central axis; when the second magnetic force piece rotates with the roller, the first magnetic force portions and the second magnetic force portions generate periodic magnetic force action.

2. The roller assembly of claim 1, wherein, the first magnetic force piece has a first surface facing the second magnetic force piece, and the first magnetic force portions are exposed on the first surface; the second magnetic force piece has a second surface facing the first magnetic force piece, and the second magnetic force portions are exposed on the second surface; the number of first magnetic force portions is the same as the number of second magnetic force portions.

3. The roller assembly of claim 2, wherein, the main body of the first magnetic force piece is disc-shaped, and the first surface is a circular end surface of the first magnetic force piece; the main body of the second magnetic force piece is disc-shaped, and the second surface is a circular end surface of the second magnetic force piece.

4. The roller assembly of claim 3, wherein an installation groove is formed in the roller, and the first magnetic force piece and the second magnetic force piece are located in the installation groove.

5. The roller assembly of claim 1, wherein Further comprising a main circuit board, the main circuit board is fixedly arranged on the base, the magnetic sensor is directly fixedly arranged on the main circuit board, the main body of the roller is located on the upper side of the main circuit board, and the central axis of the roller is parallel to the main surface of the main circuit board.

6. The roller assembly of claim 1, wherein: the first magnetic force piece is adjustably fixedly arranged on the base along the extension direction of the central axis; and / or the second magnetic force piece is adjustably fixedly arranged on the roller along the extension direction of the central axis.

7. The roller assembly of claim 6, wherein: the first magnetic force piece is mounted on the base by a screw rod and nut pair to adjust the position of the first magnetic force piece relative to the base along the extension direction of the central axis; and / or the second magnetic force piece is mounted on the roller by a screw rod and nut pair to adjust the position of the second magnetic force piece along the extension direction of the central axis.

8. The roller assembly of claim 1, wherein: one part of the first magnetic force portions and the second magnetic force portions is a magnetic pole, and the other part is a magnetic conductive portion; or the first magnetic force portions and the second magnetic force portions are all magnetic poles, the magnetic poles of each of the first magnetic force portions and each of the second magnetic force portions are the same, or the magnetic poles of each of the first magnetic force portions and each of the second magnetic force portions are opposite, or a plurality of the first magnetic force portions are a plurality of south poles and north poles alternately distributed along the circumferential direction of the roller, and a plurality of the second magnetic force portions are a plurality of south poles and north poles alternately distributed along the circumferential direction of the roller.

9. The roller assembly of claim 1, wherein: ​ The first magnetic force member is a multi-pole magnetic ring, and the first magnetic force portion corresponds to a magnetic pole of the first magnetic force member. The second magnetic force member is a multi-pole magnetic ring, and the second magnetic force portion corresponds to a magnetic pole of the second magnetic force member.

10. The scroll wheel assembly of claim 1, wherein: a magnetic shield is further included, the magnetic shield being interposed between the second magnetic force member and the permanent magnet, and the magnetic shield being further interposed between the second magnetic force member and the magnetic sensor.

11. A mouse comprising the scroll wheel assembly of any one of claims 1 to 10.

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