Mouse

Abstract

The utility model discloses a mouse, which is characterized in that a first shaft body of a mouse roller is connected to a grating encoder, a second shaft body is positioned through a positioning piece, and the grating encoder and the positioning piece can jointly limit the left-right offset of the mouse roller along the axial direction so as to realize the centered positioning of the mouse roller. Compared with the prior art, only one positioning piece needs to be arranged, so that the internal structure of the mouse can be simplified; besides, even if the positioning pieces influence the rotation of the second shaft body due to factors such as machining process precision and later aging deformation, compared with two positioning pieces, the friction positions of the rotating shaft are fewer, so that the influence of the positioning pieces is smaller, the rotation stability of the mouse roller can be ensured, and the service life of the mouse is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mice, in particular to a mouse. Background Art

[0002] The basic form of a computer mouse is a left and right button, and the middle scroll wheel can realize functions such as turning pages up and down. Among them, the mouse scroll wheel is connected to the mouse encoder to drive it to rotate to realize the use function; the current mouse encoder is divided into two types: grating encoder and mechanical encoder. At present, no matter which type of mouse encoder is used, the positioning of the scroll wheel uses two positioning grooves on the lower cover of the mouse to control the left and right position of the scroll wheel. The encoder only provides electrical functions and cannot play a positioning role. With the invention and use of grating encoders, the mouse scroll wheel needs to rotate at a high speed. If the traditional mouse two-positioning groove structure is still used, the positioning and operation of the scroll wheel will be affected due to the processing accuracy and the deformation and aging of the later materials. Utility Model Content

[0003] The main purpose of the utility model is to provide a mouse, aiming to solve the technical problem of how to improve the positioning stability of the mouse wheel.

[0004] To achieve the above object, the mouse proposed by the utility model comprises:

[0005] Motherboard;

[0006] A grating encoder, wherein the grating encoder is mounted on the main board;

[0007] A mouse wheel, the mouse wheel comprising a wheel body and a rotating shaft, the rotating shaft comprising a first shaft body and a second shaft body, the first shaft body and the second shaft body are respectively connected to opposite sides of the wheel body along the axial direction, and the first shaft body is connected to the grating encoder;

[0008] A positioning member is arranged on a side of the wheel body away from the grating encoder, and the positioning member is used to abut against the second shaft body to limit the axial displacement of the mouse wheel.

[0009] Optionally, the second shaft body includes a first shaft segment and a second shaft segment, the first shaft segment is connected to the wheel body, and the second shaft segment is connected to an end of the first shaft segment away from the wheel body; the radial dimension of the first shaft segment is larger than the radial dimension of the second shaft segment, so as to form a positioning step at the connection between the first shaft segment and the second shaft segment, and the positioning step is used to abut against the positioning member.

[0010] Optionally, the positioning member is provided with a positioning hole, the second shaft segment passes through the positioning hole, the width of the positioning hole is smaller than the radial dimension of the positioning step, and the positioning step is used to abut against the periphery of the positioning hole.

[0011] Optionally, a mounting opening penetrating through the positioning hole is provided on the top of the positioning member.

[0012] Optionally, the positioning member is provided with a positioning portion, the positioning portion surrounds the positioning hole, and the thickness of the positioning portion gradually increases from a portion close to the positioning hole toward a portion away from the positioning hole.

[0013] Optionally, the positioning piece is provided in a sheet shape, and a thickness direction of the positioning piece is consistent with an axial direction of the mouse wheel.

[0014] Optionally, the mouse further comprises a bottom shell, the main board is mounted on the bottom shell, the grating encoder and the mouse wheel are located on the top side of the main board, and the positioning member is protruded from the bottom shell and passes through the top surface of the main board.

[0015] Optionally, the main board is provided with an avoidance hole corresponding to the wheel body, and the positioning member passes through the avoidance hole and out of the top surface of the main board.

[0016] Optionally, the grating encoder comprises a housing, a grating component and a circuit board, the housing is provided with a mounting cavity and a connecting hole, the mounting cavity is communicated with the connecting hole, and the connecting hole is connected to the rotating shaft;

[0017] The grating component can be rotatably installed in the installation cavity, and the grating component includes a rotating cylinder and a grating disk sleeved on the outside of the rotating cylinder, and the rotating cylinder is coaxially arranged with the connecting hole for connecting the rotating shaft of the mouse wheel; the grating disk has a plurality of light-transmitting grooves spaced apart along the circumferential direction;

[0018] The circuit board is installed in the installation cavity, the circuit board is electrically connected with a light emitter and a light receiver, the circuit board is electrically connected to the main board, the light emitter and the light receiver are conductively connected to form a light path, and when the rotating cylinder rotates, the grating disk is driven by the rotating cylinder so that the grating disk blocks or exposes the light path.

[0019] Optionally, the grating encoder further comprises a bearing mounted in the mounting cavity, an outer ring of the bearing is fixedly matched with the housing, and an inner ring of the bearing is fixedly matched with the rotating cylinder.

[0020] In the technical solution of the mouse of the utility model, the first axis of the mouse wheel is connected to the grating encoder, and the second axis is positioned by the positioning member. The grating encoder and the positioning member can jointly limit the left and right deviation of the mouse wheel along the axis to achieve the center positioning of the mouse wheel. Compared with the prior art, the utility model only needs to set one positioning member, thereby simplifying the internal structure of the mouse; in addition, even if the positioning member affects the rotation of the second axis due to factors such as processing accuracy and later aging deformation, compared with two positioning members, the rotation axis is less subject to friction, so it is less affected by the positioning member, thereby ensuring the rotation stability of the mouse wheel and effectively extending the working life of the mouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a schematic structural diagram of an embodiment of a mouse of the utility model;

[0023] Figure 2 This is a schematic structural diagram of another embodiment of the mouse of the utility model;

[0024] Figure 3 This is a structural exploded view of an embodiment of a mouse of the utility model;

[0025] Figure 4 It is a structural cross-sectional view of an embodiment of a mouse of the utility model;

[0026] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0027] Figure 6 It is a structural cross-sectional view of another embodiment of the mouse of the utility model;

[0028] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0029] Figure 8 This is a structural exploded view of an embodiment of a grating encoder in the utility model;

[0030] Fig. 9 This is a structural exploded view of another embodiment of the grating encoder in the utility model.

[0031] Description of Figure Numbers:

[0032]

[0033]

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The basic form of a computer mouse is a left and right button, and the middle scroll wheel can realize functions such as turning pages up and down. Among them, the mouse scroll wheel is connected to the mouse encoder to drive it to rotate to realize the use function; the current mouse encoder is divided into two types: grating encoder and mechanical encoder. At present, no matter which type of mouse encoder is used, the positioning of the scroll wheel uses two positioning grooves on the lower cover of the mouse to control the left and right position of the scroll wheel. The encoder only provides electrical functions and cannot play a positioning role. With the invention and use of grating encoders, the mouse scroll wheel needs to rotate at a high speed. If the traditional mouse two-positioning groove structure is still used, the positioning and operation of the scroll wheel will be affected due to the processing accuracy and the deformation and aging of the later materials.

[0039] The utility model provides a mouse, aiming to solve the technical problem of how to improve the positioning stability of the mouse wheel 30.

[0040] In the embodiment of the present utility model, Figures 1 to 3 As shown, Figure 1 This is a schematic structural diagram of an embodiment of a mouse of the utility model; Figure 2 This is a schematic structural diagram of another embodiment of the mouse of the utility model; Figure 3 This is a structural exploded view of an embodiment of a mouse of the present invention.

[0041] The mouse includes: a main board 10; a grating encoder 20, which is mounted on the main board 10; a mouse wheel 30, which includes a wheel body 31 and a rotating shaft, and the rotating shaft includes a first shaft body 321 and a second shaft body 322, and the first shaft body 321 and the second shaft body 322 are respectively connected to opposite sides of the wheel body 31 along the axial direction, and the first shaft body 321 is connected to the grating encoder 20; a positioning member 40, which is arranged on a side of the wheel body 31 away from the grating encoder 20, and the positioning member 40 is used to abut against the second shaft body 322 to limit the axial displacement of the mouse wheel 30.

[0042] In this embodiment, the mouse further comprises a housing, the main board 10, the grating encoder 20 and the positioning member 40 are all arranged in the housing, the wheel body 31 of the mouse wheel 30 is partially located in the housing and partially located outside the housing, and the part of the wheel body 31 located outside the housing is used for the user to turn. The main board 10 is a circuit board, specifically a hard circuit board, and the main board 10 can provide power to the grating encoder 20 and transmit control signals.

[0043] like Figure 8 and Fig. 9 As shown, Figure 8 It is a structural exploded view of an embodiment of a grating encoder 20 in the present utility model; Fig. 9 It is a structural exploded view of another embodiment of the grating encoder 20 in the present invention.

[0044] The grating encoder 20 includes a housing 21, a grating component and a circuit board 25. The housing 21 is provided with an installation cavity and a connecting hole 211. The installation cavity is communicated with the connecting hole 211, and the connecting hole 211 is connected to the rotating shaft. The grating component can be rotatably installed in the installation cavity. The grating component includes a rotating cylinder 221 and a grating disk 222 sleeved on the outside of the rotating cylinder 221. The rotating cylinder 221 is coaxially arranged with the connecting hole 211 for connection with the rotating shaft of the mouse wheel 30. The grating disk 222 has a plurality of light-transmitting grooves 223 distributed at intervals along the circumferential direction. The circuit board 25 is installed in the installation cavity. The circuit board 25 is electrically connected with a light emitter and a light receiver. The circuit board 25 is electrically connected to the main board 10. The light emitter and the light receiver are connected to form an optical path. When the rotating cylinder 221 rotates, the grating disk 222 is driven by the rotating cylinder 221 so that the grating disk 222 blocks or exposes the optical path.

[0045] By manually turning the mouse wheel 30, a force is generated to drive the grating component to rotate (because the rotation axis of the mouse wheel 30 is plugged into the rotating cylinder 221). The circuit board 25 is electrically connected to the main board 10 to achieve a conductive state, and then the rotation axis of the mouse wheel 30 is inserted into the rotating cylinder 221 from the connecting hole 211. At this time, the mouse wheel 30 and the grating component are in a coaxial state. Therefore, when the mouse wheel 30 is turned by the user, the mouse wheel 30 can drive the grating disk 222 connected thereto to rotate synchronously with it through the rotating axis. At this time, the grating disk 222 can first block the optical path formed between the optical transmitter and the optical receiver and then expose the optical path again. The circuit board 25 can detect that the optical signal of the optical path changes first, and then identify the rolling state of the mouse wheel 30, so that the mouse can complete the corresponding command input work according to the rolling of the mouse wheel 30.

[0046] It is worth noting that, in some embodiments, the optical receiver may be two units integrated on the same component, namely, a first receiving unit and a second receiving unit, wherein the first receiving unit corresponds to "clockwise rotation of the grating disk 222", and the second receiving unit corresponds to "counterclockwise rotation of the grating disk 222". When the mouse wheel 30 is driven by the user to rotate counterclockwise, the mouse wheel 30 can drive the grating disk 222 connected thereto to rotate synchronously. At this time, the grating disk 222 can first block the second optical path formed between the optical transmitter and the second receiving unit and then expose the optical path again. The circuit board 25 can detect the change in the optical signal of the second optical path, and then identify the counterclockwise rotation of the mouse wheel 30, so that the mouse can complete the corresponding command input work according to the counterclockwise rolling of the mouse wheel 30.

[0047] The material of the shell 21 can be plastic, metal, or a combination of plastic and metal. The shell 21 made of plastic is relatively light and is conducive to reducing the overall volume of the mouse, which is convenient for users to use. The shell 21 made of metal has relatively strong strength and is conducive to extending the service life of the shell 21. Therefore, in some embodiments, part of the material can be metal and part of the material can be plastic.

[0048] The light emitter and the light receiver can be fixed to the circuit board 25 by welding, so as to realize electrical connection while realizing mechanical connection. Of course, in some embodiments, the light emitter and the light receiver can also be fixedly connected to the circuit board 25 by plugging. The grating encoder 20 uses infrared to send and receive signals, and there is no substantial contact when the roller works, so it has good stability and long life.

[0049] After the first shaft 321 of the rotating shaft is connected to the rotating cylinder 221 , the wheel body 31 and the second shaft body 322 are both suspended relative to the mainboard 10 . When the user turns the wheel body 31 , the first shaft body 321 drives the rotating cylinder 221 to rotate synchronously.

[0050] Specifically, Figures 4 to 7 As shown, Figure 4 It is a structural cross-sectional view of an embodiment of a mouse of the utility model; Figure 5 for Figure 4 A partial enlarged view of the middle A; Figure 6 It is a structural cross-sectional view of another embodiment of the mouse of the utility model; Figure 7 for Figure 6 A partial enlarged view of point B in the middle.

[0051] The grating encoder 20 further includes a bearing 26 installed in the installation cavity, the outer ring of the bearing 26 is fixedly matched with the housing 21, and the inner ring of the bearing 26 is fixedly matched with the rotating cylinder 221. The bearing 26 includes an outer ring, an inner ring, and a ball disposed between the outer ring and the inner ring. The bearing 26 can realize the rotational matching of the rotating cylinder 221 and the housing 21, and reduce the friction force on the rotating cylinder 221 when rotating, so as to prolong the rotation time of the rotating cylinder 221 and the mouse wheel 30, and realize the continuous rotation effect of the shuttle mouse wheel 30.

[0052] The positioning member 40 can be connected to the housing or to the mainboard 10, which is not limited here. When the mouse wheel 30 is in the center position, the second shaft 322 and the positioning member 40 do not contact each other to prevent the positioning member 40 from hindering the rotation process of the mouse wheel 30. When the mouse wheel 30 deviates toward the positioning member 40 as the use time passes, the positioning member 40 can be used to abut against the second shaft 322 to limit the axial deviation of the mouse wheel 30, so that the mouse wheel 30 can remain in the center.

[0053] Since the first shaft 321 is already connected to the grating encoder 20, and the grating encoder 20 is fixed on the main board 10, the grating encoder 20 can play a role in axial positioning of the first shaft 321, and the first shaft 321 does not need to be positioned by other positioning structures. Therefore, the centering positioning method of the mouse wheel 30 can be simplified to simplify the internal structure of the mouse. Even if the positioning member 40 affects the rotation of the second shaft 322 due to factors such as processing accuracy and later aging deformation, compared with two positioning members 40, the rotation axis is less subject to friction, so it is less affected by the positioning member 40, thereby ensuring the rotation stability of the mouse wheel 30 and effectively extending the working life of the mouse.

[0054] In practical applications, a positioning boss is formed on the outer peripheral wall of the first shaft body 321 , and the positioning boss abuts against one end of the rotating cylinder 221 facing the wheel body 31 , thereby limiting the mouse wheel 30 from deviating in a direction away from the positioning member 40 .

[0055] It can be understood that the abutment between the positioning member 40 and the second shaft body 322 is along the axial direction of the rotation axis, and the end wall of the second shaft body 322 may abut against the positioning member 40 , or the structure on the peripheral wall of the second shaft body 322 may abut against the positioning member 40 .

[0056] For example, Figures 3 to 7 As shown, the second shaft body 322 includes a first shaft section 323 and a second shaft section 324, wherein the first shaft section 323 is connected to the wheel body 31, and the second shaft section 324 is connected to one end of the first shaft section 323 away from the wheel body 31; the radial dimension of the first shaft section 323 is larger than the radial dimension of the second shaft section 324, so as to form a positioning step 325 at the connection between the first shaft section 323 and the second shaft section 324, and the positioning step 325 is used to abut against the positioning member 40. In this way, the space occupied by the arrangement of the positioning member 40 and the mouse wheel 30 can be reasonably reduced, so as to improve the effective utilization rate of the internal space of the mouse.

[0057] Specifically, Figures 3 to 7 As shown, the positioning member 40 is provided with a positioning hole 41, and the second shaft section 324 passes through the positioning hole 41. The width of the positioning hole 41 is smaller than the radial dimension of the positioning step 325, and the positioning step 325 is used to abut against the periphery of the positioning hole 41. The first shaft section 323 can pass through the positioning hole 41, but the first shaft section 323 cannot pass through the positioning hole 41. The positioning step 325 is close to the positioning hole 41, so that the abutment area between the positioning member 40 and the positioning step 325 can be increased to improve the limiting effect on the second shaft body 322. In addition, the hole wall of the positioning hole 41 can also play a role in front and rear limiting the second shaft section 324, preventing the second shaft section 324 from deviating in the front and rear direction, so that the mouse wheel 30 can also maintain a centered position in the front and rear direction.

[0058] In practical applications, such as Figure 2 and Figure 3 As shown, the top of the positioning member 40 is provided with an installation opening 42 that passes through the positioning hole 41, and the installation opening 42 is used for the second shaft section 324 to enter the positioning hole 41 from top to bottom. In this way, when assembling the mouse, the positioning member 40 and the second shaft section 324 are close to each other in the up-down direction to allow the second shaft section 324 to pass through the positioning hole 41, thereby simplifying the positioning and installation process of the positioning member 40 and the second shaft section 324. When the mouse wheel 30 needs to be disassembled for inspection and replacement, the mouse wheel 30 can also be directly taken out upwards. At this time, the installation opening 42 can prevent the positioning member 40 from hindering the process of the second shaft section 324 from leaving the positioning hole 41, thereby improving the convenience of inspecting and replacing the mouse wheel 30.

[0059] For example, Figures 3 to 7 As shown, the positioning member 40 is provided with a positioning portion 43, and the positioning portion 43 surrounds the positioning hole 41, and the thickness of the positioning portion 43 gradually increases from the portion close to the positioning hole 41 to the portion away from the positioning hole 41. In this way, the hole wall area of ​​the positioning hole 41 can be reduced to reduce the friction force received by the second shaft section 324 when contacting the hole wall of the positioning hole 41, thereby reducing the influence of the positioning member 40 on the rotation process of the mouse wheel 30 and improving the continuous rotation effect of the mouse wheel 30. In combination with the embodiment of the above-mentioned mounting opening 42, the positioning portion 43 is set in a U shape. Since the thickness of the positioning portion 43 gradually increases in the direction away from the positioning hole 41, the structural strength of the positioning portion 43 itself and the connection strength with the body of the positioning member 40 can be ensured, and the positioning portion 43 is prevented from being easily damaged or deformed when contacting the second shaft section 324, so as to improve the overall structural stability of the positioning member 40.

[0060] The positioning member 40 can be provided in a sheet shape or a block shape, which is not limited here.

[0061] Specifically, Figure 3 As shown, the positioning member 40 is provided in a sheet shape, and the thickness direction of the positioning member 40 is consistent with the axial direction of the mouse wheel 30. In this way, the space occupied by the positioning member 40 can be reduced, so that the internal structure of the mouse is simpler and more compact.

[0062] For example, Figure 3As shown, the mouse further includes a bottom shell 50, the main board 10 is mounted on the bottom shell 50, the grating encoder 20 and the mouse wheel 30 are located on the top side of the main board 10, and the positioning member 40 is protruded from the bottom shell 50 and passes through the top surface of the main board 10. The bottom shell 50 is located below the main board 10 to support and fix the main board 10. The positioning member 40 is protruded from the bottom shell 50, so that the positioning member 40 and the bottom shell 50 can be integrally formed, thereby simplifying the processing and forming method of the positioning member 40; and when the positioning member 40 abuts against the second shaft 322, the force applied to the positioning member 40 is transmitted to the bottom shell 50 instead of to the main board 10, thereby reducing the force applied to the main board 10 to protect the main board 10.

[0063] Since the positioning member 40 needs to pass through the main board 10 from bottom to top, the main board 10 needs to have a hole for the positioning member 40 to pass through.

[0064] Specifically, Figure 6 and Figure 7 As shown, the main board 10 is provided with a position-avoiding hole 11 corresponding to the wheel body 31, and the positioning member 40 passes through the top surface of the main board 10 through the position-avoiding hole 11. The position-avoiding hole 11 reduces the distance between the wheel body 31 and the main board 10 without affecting the rotation of the wheel body 31, thereby effectively reducing the height of the mouse. The positioning member 40 and the wheel body 31 can share the position-avoiding hole 11, so that the positioning member 40 can directly pass through the position-avoiding hole 11 from at least the top surface of the main board 10 from the bottom, without the need to open additional holes on the main board 10, so as to simplify the processing process of the main board 10.

[0065] In the technical solution of the mouse of the utility model, the first shaft 321 of the mouse wheel 30 is connected to the grating encoder 20, and the second shaft 322 is positioned by the positioning member 40. The grating encoder 20 and the positioning member 40 can jointly limit the left and right deviation of the mouse wheel 30 along the axial direction to achieve the center positioning of the mouse wheel 30. Compared with the prior art, the utility model only needs to set one positioning member 40, thereby simplifying the internal structure of the mouse; in addition, even if the positioning member 40 affects the rotation of the second shaft 322 due to factors such as processing accuracy and later aging deformation, compared with two positioning members 40, the rotation axis is less subject to friction, so it is less affected by the positioning member 40, thereby ensuring the rotation stability of the mouse wheel 30 and effectively extending the working life of the mouse.

[0066] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A mouse, characterized in that: include: Motherboard; A grating encoder, wherein the grating encoder is mounted on the main board; A mouse wheel, the mouse wheel comprising a wheel body and a rotating shaft, the rotating shaft comprising a first shaft body and a second shaft body, the first shaft body and the second shaft body are respectively connected to opposite sides of the wheel body along the axial direction, and the first shaft body is connected to the grating encoder; A positioning member is arranged on a side of the wheel body away from the grating encoder, and the positioning member is used to abut against the second shaft body to limit the axial displacement of the mouse wheel.

2. The mouse according to claim 1, wherein: The second shaft body includes a first shaft segment and a second shaft segment, the first shaft segment is connected to the wheel body, and the second shaft segment is connected to an end of the first shaft segment away from the wheel body; the radial dimension of the first shaft segment is larger than the radial dimension of the second shaft segment, so as to form a positioning step at the connection between the first shaft segment and the second shaft segment, and the positioning step is used to abut against the positioning member.

3. The mouse according to claim 2, wherein: The positioning member is provided with a positioning hole, the second shaft segment passes through the positioning hole, the width of the positioning hole is smaller than the radial dimension of the positioning step, and the positioning step is used to abut against the periphery of the positioning hole.

4. The mouse according to claim 3, characterized in that: The top of the positioning piece is provided with a mounting opening which passes through the positioning hole.

5. The mouse according to claim 3, characterized in that: The positioning piece is provided with a positioning portion, and the positioning portion surrounds the positioning hole to form the positioning hole. The thickness of the positioning portion gradually increases from a portion close to the positioning hole to a portion far away from the positioning hole.

6. The mouse according to any one of claims 1 to 5, characterized in that: The positioning piece is arranged in a sheet shape, and the thickness direction of the positioning piece is consistent with the axial direction of the mouse wheel.

7. The mouse according to any one of claims 1 to 5, characterized in that: The mouse also includes a bottom shell, the main board is installed on the bottom shell, the grating encoder and the mouse wheel are located on the top side of the main board, and the positioning member is protruded from the bottom shell and passes through the top surface of the main board.

8. The mouse according to claim 7, wherein: The main board is provided with a position-avoiding hole corresponding to the wheel body, and the positioning member passes through the position-avoiding hole and out of the top surface of the main board.

9. The mouse according to any one of claims 1 to 5, characterized in that: The grating encoder comprises a housing, a grating component and a circuit board, the housing is provided with a mounting cavity and a connecting hole, the mounting cavity is communicated with the connecting hole, and the connecting hole is connected with the rotating shaft; The grating component can be rotatably installed in the installation cavity, and the grating component includes a rotating cylinder and a grating disk sleeved on the outside of the rotating cylinder, and the rotating cylinder is coaxially arranged with the connecting hole for connecting the rotating shaft of the mouse wheel; the grating disk has a plurality of light-transmitting grooves spaced apart along the circumferential direction; The circuit board is installed in the installation cavity, the circuit board is electrically connected with a light emitter and a light receiver, the circuit board is electrically connected to the main board, the light emitter and the light receiver are conductively connected to form a light path, and when the rotating cylinder rotates, the grating disk is driven by the rotating cylinder so that the grating disk blocks or exposes the light path.

10. The mouse according to claim 9, wherein: The grating encoder further comprises a bearing installed in the installation cavity, the outer ring of the bearing is fixedly matched with the housing, and the inner ring of the bearing is fixedly matched with the rotating cylinder.

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