Optical lens assembly for trackball and trackball
By designing the optical lens assembly for trackballs, using the lens to refract light onto the balls, and then reflecting it onto the optical sensing processing chip, the existing trackball structure complexity and accuracy reduction are solved, and a higher accuracy and flexible cursor is achieved control.
Patent Information
- Application Number
- CN202411839270.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-02-18
AI Technical Summary
The existing trackball structure is complex and takes up a large volume. The components wear after long-term use, resulting in reduced accuracy or failure, making it difficult to achieve fast, accurate, and multi-directional cursor control.
Design an optical lens assembly for trackballs, including IC package assembly, light guide assembly, ball and ball mounting assembly, through the lens, refracts the light emitted by the LED light source onto the ball, and then refracts the light reflected by the ball to the optical sensing processing chip. On, realize the precise movement of the cursor.
The structure of the trackball is simplified, it is more flexible in use, has higher accuracy and more stable performance, and it realizes fast, accurate and multi-directional cursor control, reduces the volume occupied, and is more portable and easy to use.
Smart Images
Figure CN119473034A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of trackballs, and in particular to an optical lens assembly for a trackball and a trackball. Background Art
[0002] A trackball is a computer pointing device, similar to a mouse, that determines its position by reading the direction and speed of a rolling ball. However, unlike a mechanical mouse, a trackball is a ball that rolls on a base that remains stationary relative to the desktop. Users can use their fingers to roll the ball, which in turn drives the movement of the pointer on the screen. This eliminates the need to move the entire arm, effectively reducing hand fatigue and avoiding occupational injuries such as carpal tunnel syndrome (commonly known as "mouse hand"). It also has the advantages of precise positioning, not easy to shake, and space saving, making it suitable for a variety of work environments, especially for use during travel or in confined spaces.
[0003] Current trackballs usually include a rolling ball, two friction wheels, two rotating shafts, two light-dividing wheels (also called grating wheels), infrared light-emitting diodes (i.e., transmitting tubes), and photosensitive receiving tubes. When the trackball rolls, it drives the rotating shaft and the light-dividing wheel to rotate together. The infrared light-emitting diode emits light, and after the light is rotated and modulated by the light-dividing wheel, part of the light is received by the photosensitive receiving tube. The photosensitive receiving tube converts the received light signal into an electrical signal according to the change of the received light signal, and sends it to the computer for processing; the computer then analyzes the moving direction and speed of the trackball based on these electrical signals, and then controls the movement of the cursor on the screen. However, in this process, when the trackball is used for a long time, the components inside the trackball (such as the friction wheel, rotating shaft, and light-dividing wheel) may wear out, which may easily lead to reduced accuracy or failure, and the existing trackball has a complex structure and occupies a large volume.
[0004] Therefore, there is an urgent need for an optical lens assembly and a trackball for a trackball, which can further simplify the structure, be flexible to use, have higher precision and more stable performance, and achieve fast, accurate, and multi-directional cursor control; at the same time, effectively save space, reduce the volume occupied by the trackball, be more convenient to carry and use, and provide users with a smoother and more accurate operating experience. Summary of the invention
[0005] In order to overcome the problems existing in the related art, the present application provides an optical lens assembly for a trackball and a trackball. The optical lens assembly for a trackball and the trackball enable the trackball to further simplify its structure, be flexible to use, have higher precision and more stable performance, and achieve fast, accurate, and multi-directional cursor control; at the same time, it effectively saves space, reduces the volume occupied by the trackball, is more convenient to carry and use, and provides users with a smoother and more accurate operating experience.
[0006] The first aspect of the present application is to provide an optical lens assembly for a trackball, comprising an IC packaging assembly, a light guide assembly, a ball and a ball mounting assembly; the IC packaging assembly comprises a packaging shell, an LED light source and an optical sensing processing chip, the LED light source and the optical sensing processing chip are arranged side by side in the packaging shell; the light guide assembly is arranged above the LED light source and the optical sensing processing chip; the ball mounting assembly is arranged on the light guide assembly; the ball is arranged in the ball mounting assembly and is located next to the light guide assembly.
[0007] In a preferred technical solution of the present application, the light guide assembly includes a first lens and a second lens; the first lens is arranged directly above the LED light source and is obliquely arranged on the curved surface of the light guide plate, and is used to refract the light emitted by the LED light source onto the ball; the second lens is arranged directly above the optical sensing processing chip and is parallel to the optical sensing processing chip, and is used to refract the light reflected by the ball onto the optical sensing processing chip.
[0008] In a preferred technical solution of the present application, the light guide assembly includes a light guide mounting seat and a light guide plate; the light guide mounting seat is mounted on the IC packaging assembly; the light guide plate is arranged on the top of the light guide mounting seat; the first lens and the second lens are arranged on the light guide plate.
[0009] In a preferred technical solution of the present application, the ball mounting assembly includes a ball mounting seat and a ball cover; the ball mounting seat is slidably arranged on the light guide assembly for placing the ball; the ball cover is arranged above the ball mounting seat and connected to the ball mounting seat for limiting the ball.
[0010] In a preferred technical solution of the present application, the ball mounting seat includes a mounting groove and a ball support; the cross-section of the mounting groove is convex, and the light guide assembly is arranged in the mounting groove; the ball support is arranged at the top of the mounting groove, and the top of the ball support is slightly higher than the mounting groove, wherein the ball support is hemispherical as a whole, and a first circular through hole is provided on the side of the bottom end of the ball support close to the first lens, and the diameter of the first circular through hole is smaller than the diameter of the ball.
[0011] In a preferred technical solution of the present application, the ball cover includes a connecting seat and a second circular through hole; the connecting seat is sleeved on the top of the ball holder; the second circular through hole is arranged at the top of the connecting seat and directly facing the ball holder.
[0012] In a preferred technical solution of the present application, the connecting seat includes a first hollow frustum, a second hollow frustum and a third hollow frustum; the first hollow frustum, the second hollow frustum and the third hollow frustum are coaxially arranged in sequence from top to bottom; the second circular through hole is arranged on the first hollow frustum; the diameter of the third hollow frustum is adapted to the top diameter of the ball holder, so that the third hollow frustum can be sleeved on the ball holder.
[0013] In a preferred technical solution of the present application, the packaging shell includes a first groove and a second groove; the first groove and the second groove are arranged side by side on the packaging shell; the LED light source is arranged in the first groove; and the optical sensing processing chip is arranged in the second groove.
[0014] In a preferred technical solution of the present application, a PCB board is also included; the IC packaging assembly is fixedly arranged on the PCB board.
[0015] The second aspect of the present application is to provide a trackball, including a shell and the above-mentioned trackball optical lens assembly; the shell is provided with a contact through hole; the trackball optical lens assembly is arranged in the shell, and the top end of the ball protrudes from the contact through hole.
[0016] The technical solution provided by the present application includes the following beneficial effects: the optical lens assembly for the trackball provided by the present application includes an IC packaging assembly, a light guide assembly, a ball, a ball mounting assembly and a PCB board; by packaging the optical sensing processing chip and the LED light source as a whole in the same packaging shell, the area occupied by them on the PCB board is reduced; by arranging the first lens and the second lens above the LED light source and the optical sensing processing chip respectively, and arranging a ball next to the first lens, the light emitted by the LED light source can be refracted onto the ball, and then the light reflected by the ball is refracted onto the optical sensing processing chip. This structural design can quickly and accurately capture the track. The invention can convert every subtle movement of the ball into precise movement of the cursor on the screen without designing structures such as friction wheels, rotating shafts and light-dividing wheels, further simplifying the structure, making it more flexible to use, with higher precision and more stable performance, and realizing fast, precise and multi-directional cursor control. At the same time, it can effectively save space and reduce the volume occupied by the trackball, making it more convenient to carry and use, and providing users with a smoother and more precise operating experience. Moreover, by setting a ball holder and a ball cover, the ball can be limited in the ball holder, and by providing a first circular through hole in the ball holder and a second circular through hole on the ball cover, the ball can be exposed to the outside, which is convenient for reflecting light and user use.
[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.
[0019] Figure 1 is an exploded schematic diagram of an optical lens assembly for a trackball shown in an embodiment of the present application;
[0020] Figure 2 is a schematic structural diagram of an IC packaging assembly shown in an embodiment of the present application;
[0021] Figure 3 It is a structural schematic diagram of the cooperation between the light guide assembly and the ball mounting seat shown in the embodiment of the present application;
[0022] Figure 4 It is another structural diagram of the light guide assembly and the ball mounting seat shown in the embodiment of the present application;
[0023] Figure 5 is a schematic diagram of the structure of the light guide assembly shown in the embodiment of the present application;
[0024] Figure 6 It is a schematic diagram of the structure of the ball mounting seat shown in the embodiment of the present application;
[0025] Figure 7 It is a schematic diagram of the structure of the ball cage shown in the embodiment of the present application.
[0026] Description of reference numerals:
[0027] 1. IC packaging assembly; 11. packaging shell; 111. first groove; 112. second groove; 12. LED light source; 13. optical sensing processing chip; 2. light guide assembly; 21. first lens; 22. second lens; 23. light guide mounting seat; 24. light guide plate; 241. convex portion; 3. ball; 4. ball mounting assembly; 41. ball mounting seat; 411. mounting slide groove; 412. ball support; 413. first circular through hole; 42. ball cover; 421. second circular through hole; 422. first hollow truncated cone; 423. second hollow truncated cone; 424. third hollow truncated cone. DETAILED DESCRIPTION
[0028] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0029] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0030] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0031] At present, after long-term use, the components inside the existing trackball (such as the friction wheel, the rotating shaft and the light separation wheel) may wear out, which may easily lead to reduced accuracy or failure. In addition, the existing trackball has a complex structure and occupies a large volume.
[0032] In response to the above problems, the embodiments of the present application provide an optical lens assembly for a trackball and a trackball, which further simplify the structure, are flexible to use, have higher precision and more stable performance, and achieve fast, accurate, and multi-directional cursor control; at the same time, they effectively save space, reduce the volume occupied by the trackball, are more convenient to carry and use, and provide users with a smoother and more accurate operating experience.
[0033] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.
[0034] Embodiment 1
[0035] See also Figure 1-Figure 7The trackball optical lens assembly of the present application includes an IC package assembly 1, a light guide assembly 2, a ball 3, a ball mounting assembly 4 and a PCB board (i.e., a circuit board). The IC package assembly 1 is fixedly arranged on the PCB board and connected to the PCB board in a square flat pinless package; the light guide assembly 2 is arranged on the IC package assembly 1, and the ball mounting assembly 4 is arranged on the light guide assembly 2; the ball 3 is arranged in the ball mounting assembly 4 and is located beside the light guide assembly 2.
[0036] Specifically, the IC package assembly 1 includes a package shell 11, an LED light source 12 and an optical sensing processing chip 13. The LED light source 12 and the optical sensing processing chip 13 are arranged side by side in the package shell 11. The LED light source 12 can be a surface mount LED. Specifically, the package shell 11 includes a first groove 111 and a second groove 112. The first groove 111 and the second groove 112 are arranged side by side on the package shell 11. The LED light source 12 is arranged in the first groove 111, and the light emitting direction of the LED light source 12 faces upward; the optical sensing processing chip 13 is arranged in the second groove 112, and the photosensitive surface of the optical sensing processing chip 13 faces upward. By packaging the optical sensing processing chip 13 and the LED light source 12 as a whole in the same package shell 11, the area occupied by them on the PCB board is reduced.
[0037] The light guide assembly 2 is disposed above the LED light source 12 and the optical sensing processing chip 13. Figure 5As shown, the light guide assembly 2 includes a first lens 21, a second lens 22, a light guide mounting seat 23 and a light guide plate 24; the light guide mounting seat 23 is sleeved on the IC package assembly 1, and specifically, the light guide mounting seat 23 is frame-shaped as a whole and is adapted to the IC package assembly 1, so that the IC package assembly 1 can be completely accommodated in the light guide mounting seat 23. The light guide plate 24 is arranged at the top of the light guide mounting seat 23 and can cover the LED light source 12 and the optical sensing processing chip 13. The first lens 21 and the second lens 22 are arranged on the light guide plate 24; specifically, the light guide plate 24 includes a convex portion 241 and a flat portion, the cross-sectional shape of the convex portion 241 is fan-shaped, the first lens 21 is arranged directly above the LED light source 12, and is obliquely arranged on the convex portion 241 of the light guide plate 24, and is located on the curved surface of the convex portion 241, that is, the plane where the first lens 21 is located is neither parallel to the LED patch nor perpendicular to the LED patch, and is used to refract the light emitted by the LED light source 12 onto the ball 3; the second lens 22 is arranged on the flat portion, and is located directly above the optical sensing processing chip 13, and is parallel to the optical sensing processing chip 13, and is used to refract the light reflected by the ball 3 onto the optical sensing processing chip 13; more specifically, the second lens 22 is circular as a whole.
[0038] like Figure 3 and Figure 6 As shown, the ball mounting assembly 4 includes a ball mounting seat 41; the ball mounting seat 41 is slidably set on the light guide assembly 2 for placing the ball 3; specifically, the ball mounting seat 41 includes a mounting groove 411 and a ball holder 412; the cross-section of the mounting groove 411 is convex, and the light guide assembly 2 is arranged in the mounting groove 411; more specifically, the mounting groove 411 includes an upper part and a lower part, after the light guide assembly 2 is slid into the mounting groove 411 along the groove wall of the lower part, the side surface and the bottom surface of the light guide mounting seat 23 are respectively abutted against the groove wall of the lower part, and the convex portion 241 is accommodated in the upper part and is located next to the ball holder 412. The ball holder 412 is arranged at the top of the mounting groove 411, and the top of the ball holder 412 is slightly higher than the mounting groove 411. Specifically, the ball holder 412 is hemispherical as a whole and is used to accommodate the ball 3. A first circular through hole 413 is provided on the side of the bottom end of the ball holder 412 close to the first lens 21. The diameter of the first circular through hole 413 is smaller than the diameter of the ball 3, so that a part of the surface of the ball 3 can be exposed at the first circular through hole 413; when the light is refracted by the first lens 21, it can be irradiated on the ball 3.
[0039] In order to prevent the ball 3 from being separated from the ball holder 412, the ball installation assembly 4 further includes a ball cover 42, which is arranged above the ball installation seat 41 and connected to the ball installation seat 41, and is used to limit the ball 3. Specifically, the ball cover 42 includes a second circular through hole 421 and a connecting seat; the connecting seat is sleeved on the top of the ball holder 412, and the second circular through hole 421 is arranged on the top of the connecting seat and directly faces the ball holder 412, so that the top of the ball 3 is exposed to the outside for easy access by users. Exemplarily, the connecting seat includes a first hollow truncated cone 422, a second hollow truncated cone 423 and a third hollow truncated cone 424, wherein the first hollow truncated cone 422, the second hollow truncated cone 423 and the third hollow truncated cone 424 are coaxially arranged in sequence from top to bottom, that is, the cross-sections of the first hollow truncated cone 422, the second hollow truncated cone 423 and the third hollow truncated cone 424 form a stepped shape; the second circular through hole 421 is arranged on the first hollow truncated cone 422, and the diameter of the second circular through hole 421 is smaller than the diameter of the ball 3; the diameter of the third hollow truncated cone 424 is adapted to the top diameter of the ball holder 412, so that the third hollow truncated cone 424 can be sleeved on the ball holder 412. When the ball cover 42 is fixed on the ball mounting seat 41, the ball 3 can be limited in the area surrounded by the ball holder 412 and the ball cover 42.
[0040] Working principle:
[0041] Installation steps: first solder the IC package component 1 to the PCB board, then sleeve the light guide mounting seat 23 of the light guide component 2 on the IC package component 1, then align the mounting groove 411 of the ball mounting seat 41 with the IC package component 1, and slide from one end of the IC package component 1 to the other end until the first lens 21 is located next to the ball holder 412, then place the ball 3 in the ball holder 412, and finally cover the ball cover 42 on the ball holder 412, so as to limit the ball 3 in the ball holder 412, and complete the installation of the optical lens assembly for the trackball.
[0042] Principle description: After the trackball is connected to the power supply with an optical lens assembly, the LED light source 12 emits light, which passes through the light guide plate 24 to the first lens 21. Through the refraction of the first lens 21, the light can be irradiated on the surface of the ball 3. The ball 3 will reflect part of the light to the second lens 22, and the second lens 22 will refract this part of the light to the optical sensing processing chip 13. After receiving the light (optical signal), the optical sensing processing chip 13 converts it into an electronic signal and sends it to the computer. After receiving these signals, the computer will analyze them and move the mouse cursor to the corresponding position on the screen. When the user moves the ball 3, the direction of the light reflected from the ball 3 to the second lens 22 will change, so that the optical sensing processing chip 13 receives different light signals, thereby capturing the direction and speed of the ball 3, and judging the moving direction and moving distance of the trackball, so as to complete the positioning of the cursor, thereby achieving more accurate and efficient computer operation.
[0043] In the first embodiment, the optical lens assembly for a trackball provided by the present application includes an IC packaging assembly, a light guide assembly, a ball, a ball mounting assembly and a PCB board; the optical sensing processing chip and the LED light source are packaged as a whole in the same packaging shell, thereby reducing the area occupied by the chip on the PCB board; the first lens and the second lens are respectively arranged above the LED light source and the optical sensing processing chip, and a ball is arranged beside the first lens, so that the light emitted by the LED light source can be refracted onto the ball, and then the light reflected by the ball is refracted onto the optical sensing processing chip. This structural design can quickly and accurately capture every angle of the trackball. The invention can detect subtle movements and convert them into precise movement of the cursor on the screen without designing structures such as friction wheels, rotating shafts and light-dividing wheels, further simplifying the structure, making it more flexible to use, with higher precision and more stable performance, realizing fast, precise and multi-directional cursor control, and at the same time, effectively saving space and reducing the volume occupied by the trackball, making it more convenient to carry and use, and providing users with a smoother and more precise operating experience; moreover, by setting a ball holder and a ball cover, the ball can be limited in the ball holder, and by providing a first circular through hole in the ball holder and a second circular through hole on the ball cover, the ball can be exposed to the outside, which is convenient for reflecting light and user use.
[0044] Embodiment 2
[0045] Corresponding to the above-mentioned trackball optical lens assembly, the present application also proposes a corresponding solution, please refer to Figure 1-Figure 7 , specifically:
[0046] Based on the structure of the above-mentioned embodiment 1, the trackball provided in the embodiment of the present application includes a shell and the above-mentioned trackball optical lens assembly; the shell is provided with a contact through hole, the trackball optical lens assembly is arranged in the shell, and the top end of the ball protrudes from the contact through hole; during operation, the user only needs to touch the ball with a finger to drag the computer page and move the cursor.
[0047] The specific structure of the optical lens assembly for the trackball is detailed in the above-mentioned embodiment 1, and will not be repeated here.
[0048] In the second embodiment, the contact through hole is provided to make the ball protrude from the shell, so that when operating, the user only needs to roll the ball with a finger to drag the computer page and move the cursor, which further simplifies the structure and reduces the volume of the entire trackball. It is flexible to use and suitable for spaces with limited moving range, greatly improving the versatility and practicality of the trackball.
[0049] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.
[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An optical lens assembly for a trackball, characterized in that: It comprises an IC packaging component (1), a light guide component (2), a ball (3) and a ball mounting component (4); The IC packaging component (1) comprises a packaging shell (11), an LED light source (12) and an optical sensing processing chip (13), wherein the LED light source (12) and the optical sensing processing chip (13) are arranged side by side in the packaging shell (11); The light guide component (2) is arranged above the LED light source (12) and the optical sensing processing chip (13); The ball mounting assembly (4) is arranged on the light guide assembly (2); The ball (3) is arranged in the ball mounting assembly (4) and is located beside the light guide assembly (2).
2. The optical lens assembly for a trackball according to claim 1, wherein: The light guide assembly (2) comprises a first lens (21) and a second lens (22); The first lens (21) is arranged directly above the LED light source (12) and is obliquely arranged on the curved surface of the light guide plate (24) to refract the light emitted by the LED light source (12) onto the ball (3); The second lens (22) is arranged directly above the optical sensing processing chip (13) and parallel to the optical sensing processing chip (13), and is used to refract the light reflected by the ball (3) onto the optical sensing processing chip (13).
3. The optical lens assembly for a trackball according to claim 2, wherein: The light guide assembly (2) also includes a light guide mounting seat (23) and a light guide plate (24); The light guide mounting seat (23) is sleeved on the IC packaging component (1); The light guide plate (24) is arranged on the top end of the light guide mounting seat (23); The first lens (21) and the second lens (22) are arranged on the light guide plate (24).
4. The optical lens assembly for a trackball according to claim 2, wherein: The ball mounting assembly (4) comprises a ball mounting seat (41) and a ball cover (42); The ball mounting seat (41) is slidably arranged on the light guide assembly (2) and is used for placing the ball (3); The ball cover (42) is arranged above the ball mounting seat (41) and is connected to the ball mounting seat (41) and is used to limit the position of the ball (3).
5. The optical lens assembly for a trackball according to claim 4, wherein: The ball mounting seat (41) comprises a mounting slot (411) and a ball support (412); The cross section of the installation slide groove (411) is in a convex shape, and the light guide component (2) is arranged in the installation slide groove (411); The ball support (412) is arranged at the top end of the installation slide groove (411), and the top end of the ball support (412) is slightly higher than the installation slide groove (411), wherein the ball support (412) is hemispherical as a whole, and a first circular through hole (413) is provided at the bottom end of the ball support (412) close to the first lens (21), and the diameter of the first circular through hole (413) is smaller than the diameter of the ball (3).
6. The optical lens assembly for a trackball according to claim 5, characterized in that: The ball cover (42) comprises a connecting seat and a second circular through hole (421); The connecting seat sleeve is arranged on the top end of the ball support (412); The second circular through hole (421) is arranged at the top end of the connecting seat and is directly opposite to the ball support (412).
7. The optical lens assembly for a trackball according to claim 6, wherein: The connecting seat comprises a first hollow truncated cone (422), a second hollow truncated cone (423) and a third hollow truncated cone (424); The first hollow truncated cone (422), the second hollow truncated cone (423) and the third hollow truncated cone (424) are coaxially arranged in sequence from top to bottom; The second circular through hole (421) is arranged on the first hollow truncated cone (422); The diameter of the third hollow truncated cone is matched to the top diameter of the ball holder (412), so that the third hollow truncated cone can be sleeved on the ball holder (412).
8. The optical lens assembly for a trackball according to claim 1, wherein: The packaging shell (11) comprises a first groove (111) and a second groove (112); The first groove (111) and the second groove (112) are arranged side by side on the packaging shell (11); The LED light source (12) is arranged in the first groove (111); The optical sensing processing chip (13) is arranged in the second groove (112).
9. The optical lens assembly for a trackball according to claim 1, wherein: Also includes PCB board; The IC packaging component (1) is fixedly arranged on the PCB board.
10. A trackball, characterized in that: A trackball optical lens assembly comprising a housing and the trackball optical lens assembly according to any one of claims 1 to 9; The housing is provided with a contact through hole; The trackball optical lens assembly is arranged in the housing, and the top end of the rolling ball (3) protrudes from the contact through hole.