Incremental mechanical rotary silent encoder structure

Abstract

The utility model provides a kind of incremental mechanical rotary mute encoder structure, it is related to the encoder technical field of detecting scroll wheel rotation in mouse.Solve the technical insufficient of the rotor of existing mouse scroll wheel encoder and mouse scroll wheel between big noise, including needle holder, switching piece, rotor, positioning piece and shell;A with rubber sleeve is embedded and fixedly installed in the rotor inner cavity;The rubber sleeve is coaxial with the rotor, and the rubber sleeve is provided with rubber sleeve mounting hole for interference fit installation with scroll wheel shaft square column, and the hole diameter of rubber sleeve mounting hole is smaller than the hole diameter of the first square hole.By the interference fit of rubber sleeve and scroll wheel shaft square column, flexible support, solve the technical insufficient of the collision between scroll wheel shaft square column and rotor and produce noise, without affecting the scroll wheel shaft to press down the microswitch of middle key, also effectively solve the loose texture of existing mouse scroll wheel, effectively improve the quality of high-end mouse, meet the experience of high-end user for mouse use.

Description

Technical Field

[0001] This invention relates to the field of encoder technology for detecting scroll wheel rotation in a mouse. Background Technology

[0002] The main structure of a mouse wheel encoder includes a rotor that rotates synchronously with the wheel. The rotor is housed in a pin holder with three code disk terminals. A switching plate is fixedly mounted on the end face of the rotor. When the rotor rotates, the switching plate causes the three code disk terminals to alternately connect and disconnect, thereby generating pulse signals. The computer determines the rotation direction and speed of the wheel based on these pulse signals, and converts the mouse wheel operation into control commands.

[0003] Since the mouse scroll wheel also functions as the middle mouse button, meaning there's a microswitch corresponding to its axis, pressing the scroll wheel triggers this microswitch. Therefore, in addition to rotation, the scroll wheel's axis needs vertical movement. The square hole of the encoder rotor is usually slightly larger than the square post of the scroll wheel axis, resulting in a gap between them. Since both the scroll wheel axis and the rotor are typically made of hard plastic, they collide and produce noise during rapid scroll wheel rotation. This also makes the scroll wheel feel loose, reducing the mouse's quality and failing to meet the user experience requirements of high-end users. Utility Model Content

[0004] In summary, the purpose of this utility model is to address the technical shortcomings of existing mouse wheel encoders, which suffer from high noise levels between the rotor and the mouse wheel, and to propose an incremental mechanical rotary silent encoder structure.

[0005] To address the technical shortcomings of this utility model, the following technical solution is adopted: An incremental mechanical rotary silent encoder structure includes a needle holder, a switching plate disposed in the needle holder, a rotor that drives the switching plate to rotate, a positioning plate disposed in the needle holder for elastic positioning of the rotor, and a housing that encloses the needle holder and the rotor; the rotor is provided with positioning teeth and a first square hole; characterized in that: a rubber sleeve is embedded and fixedly installed in the inner cavity of the rotor; the rubber sleeve is coaxially arranged with the rotor, and the rubber sleeve is provided with a rubber sleeve mounting hole for interference fit with the square post of the roller shaft, the diameter of the rubber sleeve mounting hole being smaller than the diameter of the first square hole.

[0006] Further defining technical features of this utility model include: The mounting hole of the rubber sleeve is a second square hole that is proportionally reduced from the first square hole; the inner end face or side face of the rubber sleeve is fixedly installed with the rotor by a positioning structure in which a positioning protrusion and a positioning groove cooperate.

[0007] The rotor is also provided with a circular rubber sleeve anti-detachment cover plate; the rubber sleeve anti-detachment cover plate abuts against the outer end face of the rubber sleeve; the rubber sleeve anti-detachment cover plate is provided with riveting holes, and the rotor end face is provided with rivets that mate with the riveting holes.

[0008] The rotor cavity opening is provided with a heat-fused snap-fit ​​inner edge for wrapping the rubber sleeve.

[0009] The rotor cavity opening is fitted with a rubber sleeve anti-detachment cover plate, which is interference-fitted with the inner wall of the rotor cavity opening.

[0010] The positioning piece is a U-shaped spring piece structure, including an integral left elastic arm, a right elastic arm, and a fixing piece. The left and right elastic arms are respectively vertically arranged at the left and right ends of the fixing piece. The left and right elastic arms are respectively provided with arc-shaped inwardly protruding positioning parts. The needle seat is provided with a fixing piece locking groove that engages with the fixing piece. The left and right elastic arms elastically abut against the arc-shaped positioning teeth on the left and right outer side walls of the rotor through the arc-shaped inwardly protruding positioning parts.

[0011] The positioning plate includes a left elastic arm, a right elastic arm, and a fixing plate, which are integrally structured. The left elastic arm and the right elastic arm are respectively provided with arc-shaped inwardly protruding positioning parts. The fixing plate is located on the side of the needle seat. The fixing plate and the needle seat are positioned and installed by positioning holes and positioning pins. The left elastic arm and the right elastic arm are elastically abutted against the arc-shaped positioning teeth on the left and right outer side walls of the rotor by the arc-shaped inwardly protruding positioning parts.

[0012] The positioning piece includes an integral annular spring and a fixing plate. The annular spring has a lateral arc-shaped protrusion. The fixing plate is located on the side of the needle seat. The fixing plate and the needle seat are positioned and installed by positioning holes and positioning pins. The annular spring elastically abuts against the arc-shaped positioning teeth on the outer end face of the rotor through the lateral arc-shaped protrusion.

[0013] The beneficial effects of this utility model are as follows: This utility model solves the technical shortcomings of noise generated by the collision between the roller shaft and the rotor by embedding and fixing a rubber sleeve in the inner cavity of the rotor, and the rubber sleeve and the roller shaft square column are interference fit and flexibly supported. Without affecting the micro switch of the middle button when the roller shaft is pressed, it also effectively solves the loose texture of the existing mouse scroll wheel, effectively improves the quality of high-end mice, and meets the experience of high-end users. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention when used in combination with a mouse scroll wheel; Figure 2 This is a cross-sectional view of the present invention when used in combination with a mouse wheel; Figure 3 This is a three-dimensional structural diagram of the present invention; Figure 4 This is a schematic diagram of the rear view structure of this utility model; Figure 5 This is an exploded structural diagram of Embodiment 1 of the present invention; Figure 6 This is an exploded structural diagram of Embodiment 1 of the present invention from another angle; Figure 7 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention after the outer shell has been removed; Figure 8 and Figure 9 Schematic diagrams of two other positioning structures between the rubber sleeve and the rotor; Figure 10 This is an exploded structural diagram of Embodiment 2 of the present invention; Figure 11 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention after the outer shell has been removed; Figure 12 This is an exploded structural diagram of Embodiment 3 of the present invention; Figure 13 This is an exploded structural diagram of Embodiment 3 of the present invention from another angle; Figure 14 This is a schematic diagram of the internal structure of Embodiment 3 of this utility model after the outer shell has been removed. Detailed Implementation

[0015] The structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] Reference Figures 1 to 7 As shown, the present invention discloses an incremental mechanical rotary silent encoder structure, including a needle holder 1, a switching plate 2 disposed in the needle holder 1, a rotor 3 that drives the switching plate 2 to rotate, a positioning plate 4 disposed in the needle holder 1 for elastic positioning of the rotor 3, and a housing 5 that encloses the needle holder 1 and the rotor 3.

[0017] The pin holder 1 is typically composed of a plastic housing 11 and three code disk terminals 12. The switching plate 2 is disposed in the plastic housing 11 and is fixedly connected to the inner end face of the rotor 3. The switching plate 2 can rotate with the rotor 3. The rotor 3 is provided with positioning teeth 31 and a first square hole 32. During use, the square post 61 of the scroll wheel 6 is inserted into the first square hole 32. During the rotation of the mouse scroll wheel 6, the three code disk terminals 12 alternately connect and disconnect, thereby generating a pulse signal. This basic working principle is the same as that of existing encoders. The main difference is that a rubber sleeve 7 is embedded and fixedly installed in the inner cavity of the rotor 3. The rubber sleeve 7 is coaxially arranged with the rotor 3. The rubber sleeve 7 is provided with a rubber sleeve mounting hole 71 for interference fit installation with the scroll wheel shaft square post 61. The diameter of the rubber sleeve mounting hole 71 is smaller than the diameter of the first square hole 32. The rubber sleeve 7 provides flexible support for the roller shaft square post 61, preventing vibration and noise caused by the gap between the roller shaft square post 61 and the first square hole 32 during the rapid rotation of the mouse roller 6. This effectively solves the technical shortcomings of existing encoders where noise is generated by the collision between the roller shaft square post 61 and the rotor 3. In specific implementation, the mounting hole 71 on the rubber sleeve 7 is preferably a hexagonal second square hole that is proportionally reduced from the first square hole, as shown in the reference. Figure 6 As shown; it can also be used Figure 8 The circular hole shown. When using a hexagonal second square hole, as... Figure 5 As shown, the side of the rubber sleeve 7 is fixedly engaged with the rotor 3 by a positioning structure in which a positioning protrusion and a positioning groove cooperate, or by using... Figure 9 The inner end face of the rubber sleeve 7 shown is fixedly installed with the rotor 3 by a positioning structure in which a positioning protrusion and a positioning groove cooperate.

[0018] like Figure 5 As shown, in order to prevent the rubber sleeve 7 from falling off the cavity of the rotor 3, the rotor 3 is also provided with a circular rubber sleeve anti-detachment cover plate 8; the rubber sleeve anti-detachment cover plate 8 abuts against the outer end face of the rubber sleeve 7; the rubber sleeve anti-detachment cover plate is provided with a riveting hole, and the rotor end face is provided with a rivet post that mates with the riveting hole.

[0019] In specific implementation, to prevent the rubber sleeve 7 from falling out of the cavity of the rotor 3, after the rubber sleeve 7 is installed into the cavity of the rotor 3, a heat-fused snap-fit ​​inner edge for wrapping the rubber sleeve is formed at the opening of the cavity of the rotor 3 by heat fusion. Alternatively, an anti-detachment cover plate for the rubber sleeve is embedded in the opening of the cavity of the rotor 3, and the anti-detachment cover plate is interference-fitted with the inner wall of the opening of the cavity of the rotor.

[0020] Reference Figure 5 and Figure 7As shown in the diagram, the positioning piece 4 in this embodiment is a U-shaped spring structure, including an integrally formed left elastic arm 41, right elastic arm 42, and fixing piece 43. The left elastic arm 41 and right elastic arm 42 are respectively vertically disposed at the left and right ends of the fixing piece 43. The left elastic arm 41 and right elastic arm 42 are respectively provided with arc-shaped inwardly protruding positioning parts 40. The needle seat 1 is provided with a fixing piece engaging groove 43 that engages with the fixing piece 43. The left elastic arm 41 and right elastic arm 42 elastically abut against the arc-shaped positioning teeth 31 on the left and right outer side walls of the rotor 3 through the arc-shaped inwardly protruding positioning parts. The arc-shaped positioning teeth 31 elastically engage with the arc-shaped inwardly protruding positioning parts 40 on the left elastic arm 41 and right elastic arm 42, which not only has the function of positioning the rotation angle of the rotor 3, but also has the effect of smooth transition and reducing rotation noise.

[0021] Figures 10 to 11 The image shows a second embodiment of the positioning piece 4. The difference between this embodiment and the one with the U-shaped spring sheet structure is that the fixing piece 43 is replaced with a fixing plate 430. The fixing plate 430 is placed on the side of the needle seat 1 and fixed by the outer shell 5. That is, the positioning piece 4 includes an integral left elastic arm 41, a right elastic arm 42 and a fixing plate 430. The left elastic arm 41 and the right elastic arm 42 are respectively provided with arc-shaped inwardly protruding positioning parts 40. The fixing plate 430 is located on the side of the needle seat 1. The fixing plate 430 and the needle seat 1 are also positioned and installed by positioning holes and positioning pins. The left elastic arm 41 and the right elastic arm 42 are elastically abutted against the arc-shaped positioning teeth on the left and right outer side walls of the rotor by the arc-shaped inwardly protruding positioning parts 40.

[0022] Figures 12 to 14 The image shows a third embodiment of the positioning piece 4. The positioning piece 4 includes an annular spring piece 431 and a fixing plate 430 with an integral structure. The annular spring piece 431 is provided with a lateral arc-shaped protrusion 432. The rotor 3 adopts a structure similar to a bevel gear. Each positioning tooth 31 on the rotor is also an arc-shaped positioning tooth. The fixing plate 430 is located on the side of the needle seat 1. The fixing plate 430 and the needle seat 1 are positioned and installed by the positioning hole and the positioning post. The annular spring piece 431 elastically abuts against the arc-shaped positioning tooth 31 on the outer end face of the rotor 3 through the lateral arc-shaped protrusion 432.

[0023] In summary, this utility model, through the aforementioned structure, effectively solves the technical problem of scroll wheel rotation noise without affecting the original function and operation feel of the mouse scroll wheel, effectively improving the quality of high-end mice and satisfying the experience of high-end users.

Claims

1. An incremental mechanical rotary silent encoder structure, comprising a needle holder, a switching plate disposed in the needle holder, a rotor driving the switching plate to rotate, a positioning plate disposed in the needle holder for elastic positioning of the rotor, and a housing enclosing the needle holder and the rotor; the rotor is provided with positioning teeth and a first square hole; characterized in that: A rubber sleeve is embedded and fixedly installed in the inner cavity of the rotor; the rubber sleeve is coaxially arranged with the rotor, and the rubber sleeve is provided with a rubber sleeve mounting hole for interference fit with the square column of the roller shaft. The diameter of the rubber sleeve mounting hole is smaller than the diameter of the first square hole.

2. The incremental mechanical rotary silent encoder structure according to claim 1, characterized in that: The mounting hole of the rubber sleeve is a second square hole that is proportionally reduced from the first square hole; the inner end face or side face of the rubber sleeve is fixedly installed with the rotor by a positioning structure in which a positioning protrusion and a positioning groove cooperate.

3. The incremental mechanical rotary silent encoder structure according to claim 2, characterized in that: The rotor is also provided with a circular rubber sleeve anti-detachment cover plate; the rubber sleeve anti-detachment cover plate abuts against the outer end face of the rubber sleeve; the rubber sleeve anti-detachment cover plate is provided with riveting holes, and the rotor end face is provided with rivets that mate with the riveting holes.

4. The incremental mechanical rotary silent encoder structure according to claim 2, characterized in that: The rotor cavity opening is provided with a heat-fused snap-fit ​​inner edge for wrapping the rubber sleeve.

5. The incremental mechanical rotary silent encoder structure according to claim 1, characterized in that: The rotor cavity opening is fitted with a rubber sleeve anti-detachment cover plate, which is interference-fitted with the inner wall of the rotor cavity opening.

6. The incremental mechanical rotary silent encoder structure according to claim 1, characterized in that: The positioning piece is a U-shaped spring piece structure, including an integral left elastic arm, a right elastic arm, and a fixing piece. The left and right elastic arms are respectively vertically arranged at the left and right ends of the fixing piece. The left and right elastic arms are respectively provided with arc-shaped inwardly protruding positioning parts. The needle seat is provided with a fixing piece locking groove that cooperates with the fixing piece. The left and right elastic arms elastically abut against the arc-shaped positioning teeth on the left and right outer side walls of the rotor through the arc-shaped inwardly protruding positioning parts.

7. The incremental mechanical rotary silent encoder structure according to claim 1, characterized in that: The positioning plate includes a left elastic arm, a right elastic arm, and a fixing plate, which are integrally structured. The left elastic arm and the right elastic arm are respectively provided with arc-shaped inwardly protruding positioning parts. The fixing plate is located on the side of the needle seat. The fixing plate and the needle seat are positioned and installed by positioning holes and positioning pins. The left elastic arm and the right elastic arm are elastically abutted against the arc-shaped positioning teeth on the left and right outer side walls of the rotor by the arc-shaped inwardly protruding positioning parts.

8. The incremental mechanical rotary silent encoder structure according to claim 1, characterized in that: The positioning piece includes an integral annular spring and a fixing plate. The annular spring has a lateral arc-shaped protrusion. The fixing plate is located on the side of the needle seat. The fixing plate and the needle seat are positioned and installed by positioning holes and positioning pins. The annular spring elastically abuts against the arc-shaped positioning teeth on the outer end face of the rotor through the lateral arc-shaped protrusion.

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