TW504638B - Optical mouse with a simplified design - Google Patents

Abstract

An optical mouse has a monolithic bottom housing, a lens set component and a circuit board for control circuitry. The bottom housing has an opening and a light source mount. The lens set component is disposed over the opening. The circuit board has a light source and a light sensor, which are mounted on the circuit board. The circuit board is fixed within the bottom housing over the lens set component, and helps to secure the lens set component within the bottom housing. The light source sets within the light source mount. The light source mount helps to fix the angular orientation of the light source within the bottom housing so that light from the light source is directed through the opening onto the surface on which the optical mouse slides. Light reflecting from the surface passes through the lens set component to the light sensor.

Description

504638 V. Description of the invention (1) Field of the invention: The present invention provides an optical mouse, especially an optical mouse with disordered optical structure design. Background: As is well known in the industry, a traditional mechanical mouse uses a sphere installed in the mouse housing, and exposes a part of the sphere to the outside of the housing and contacts the external surface (such as a desktop). When the mechanical mouse moves on a plane, the sphere rolls in the mouse and triggers the sensor in the mouse, and the sensor® sensor breaks the ball's rolling motion into two perpendicular components and merges Is the corresponding signal. This design has been used extensively for many years and is still very common today. But unfortunately, the rolling of the sphere can get dusty; this dust can accumulate on the sensors and interfere with their movement. If it is not cleaned regularly, the operation of the mechanical mouse will start to become irregular, or it will become stuck or the mouse's movement will be uneven. The advent of the optical mouse overcomes this problem. The optical mouse does not sense the mechanical movement of the sphere, but quickly obtains a continuous picture of the plane, and then compares them with each other to determine the direction and distance of the optical mouse. The principle of optical sensing in the optical mouse and the method of processing continuous picture data are well known in the art, so it is unnecessary to repeat them here. Because there is no mechanical moving part in the optical mouse that will wear or get stuck, its reliability is relatively high.

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5. Description of the invention (2) High; and the optical mouse can also sense the user's movement more smoothly. See Figure 1. FIG. 1 is a bottom view of a conventional optical mouse 5. The optical mouse 5 has a bottom case 20 with an opening 25 in it. Through the opening 25, the optical mouse 5 will "see" the plane on which the optical slider defeated. The displacement data obtained by comparing the plane images will be sent to a computer (not shown) through a cable 3; and the end of the cable 3 can be many standard adapters, such as PS / 2 adapter Heads, universal serial bus (USB) adapters, and more. See Figure 2. Figure 2 is a partially exploded view of the optical system in the conventional optical mouse 5. An optical group 30 is mounted on the opening 25 of the base 20, and the optical group 30 includes a lens 32, a first reflecting surface 34, and a second reflecting surface 36. A circuit board 40 is provided on the optical group 30. The circuit board 40 has a hole 48, which is located above the lens 32, and a light sensor 42 is installed above the hole 48 of the circuit board 40. The optical sensor 4 2 will obtain the image of the optical mouse 5 sliding over the plane, and analyze the daylight surface obtained by the optical sensor 4 2 by a circuit (not shown in the figure), thereby determining the value shift of the optical mouse 5. A light emitting diode 44 is also mounted on the circuit board 40. The light emitting diode 44 is used as a light source of the light sensor 42. Because the first reflecting surface 34 will protrude beyond the hole 48, the first reflecting surface 34 is located between the light emitting diode 44 and the light sensor 42. Finally, a light cover 46 is also mounted on the circuit board 40 to prevent the light emitted by the light emitting diode 44 from directly entering the light sensor 42.

Page 5 504638 V. Description of the invention (3) Please refer to Figure 3 (also refer to Figure 2). Fig. 3 is a side view of the optical system 10 in Fig. 2 after being moderately simplified. The light 11 is emitted by the light-emitting diode 4 4. Although the mask 4 6 interrupts a small part of the light 1 1 1, most of the light 1 1 will be directed toward the direction in which the light-emitting diode 4 4 faces; since the light-emitting diode 44 faces The opposite direction is the first reflecting surface 34. Most of the light rays 11 will be directed toward the first reflecting surface 3 4 and reflected downward from the first reflecting surface 34 to the second reflecting surface 36. After being reflected by the second reflecting surface 36, the light 11 passes through the opening 25 of the bottom case 20 and illuminates the plane 13. The light 1 1 incident on the plane 1 3 will be modulated and reflected by the surface characteristics of the plane 1 3 to become the light 1 2. Next, the light 12 will be collected by the lens 32 and focused on the light sensor 4 2. The light sensor 4 2 continuously obtains a picture of the plane 13 by using the light 12 and analyzes these continuous daylight surfaces to determine the moving direction and distance of the optical mouse 5. The optical system 10 is easy to use but complicated. Specifically, the optical group 30 including the first reflecting surface 34 and the second reflecting surface 36 is quite expensive. Expensive components will increase the overall price of the optical mouse, making it incapable of competing with mechanical mice in the market. SUMMARY OF THE INVENTION Therefore, the main object of the present invention is to provide an optical mouse with a simplified design of an optical system. Detailed description of the invention:

504638 V. Description of the invention (4) 1. Please refer to Figure 4. FIG. 4 is a bottom view of the optical mouse 50 according to the present invention. — The learning mouse 50 is designed to glide on a plane (like the desktop, but i-light in the picture), and detect the gliding motion. The optical mouse 50 has a bottom ^ and a first opening 62 thereon. Through the first opening 62, the optical mouse 7 measures the plane on which the optical mouse 50 slides. Displacement data will be transferred to a computer (not shown) using an electrical navigation line $ '. The end of the cable 5 3 can be a standard adapter from Xu Xi, such as a PS / 2 adapter, universal serial bus: \

) Adapter and so on. For L USB, please refer to Figure 5 and Figure 6 (also refer to Figure 4). Figure 5 is a partial exploded view of the optical system 1 1 0 of the wind mouse 50. Fig. 6 is a side view of the "system" of the optical science department. The optical system 1 10 includes a bottom case 60, a light source '1/0 sheet group 80, a circuit board 90, and a light sensor. 1 〇〇. The light sensor & 〇 will detect the light reflected from the plane 51 1 1 3, and obtain one of the plane 5 1 ^ string picture. The light sensor 1 0 0 includes a light sensing and control circuit (Not shown) 'Enables the light sensor 100 to analyze these continuous frames and thereby determine the direction and distance of movement of the optical mouse 50. An example of a similar device is

HDNS-2 0 0 by Agi lent Technologies. The output of the optical sensor 100 is transmitted to the computer (not shown) through the electrical winding 53. The light sensor 100 is itself mounted on the circuit board 90 and electrically connected to the circuit board 90. In addition, the circuit board 90 has a second opening 92, and the light sensor 100 is installed at a position across the second opening 92 so that the light 1113 can be incident on the light sensor.器 1〇〇。 100.

Page 7 504638 V. Description of the invention (5) The bottom case 60 itself is an integrally molded structure made of pressure plastic. In other words, the bottom case 60 is a single plastic structure, which is formed by plastic injection at high temperature and high pressure. Of course, in addition to plastic, the bottom case 60 can also be made of other materials; but plastic is very cheap, easy to manufacture, and quite durable. The bottom case 60 has a first opening 6 2, a light source holder 6 6, a plurality of L-shaped positioning seats 67, and a fixing clip 69. Through the first opening 62 in the bottom case 60, the light 1 1 2 from the light source 70 can enter the plane 5 1; and the light 1 1 3 reflected from the plane 51 can also reach the light sensor 1 0 0 . The light source holder 6 6 is designed to receive the light source 70, and has a bottom surface 6 4 inclined toward the first opening 6 2, and both sides 6 3. The bottom surface 64 is placed between the two sides 63, and is inclined and _ forms an angle of 6 »with the surface of the bottom case 60; and this inclined angle can fix the light source 70 at a certain angle, The light source 70 is directed toward the first opening 62 at a predetermined angle. This predetermined angle is determined by the designer, and the designer can choose an angle that can highlight the surface characteristics of the plane 51, so that the light 1 1 2 incident on the plane 51 can highlight the surface characteristics of the plane 51, and The degree of modulation of the light 1 1 3 reflected from the plane 51 by the surface characteristics of the plane 51 is greater, thereby improving the sensitivity of the optical mouse of the present invention. The L-shaped positioning seat 67 provided on the bottom case 60 can fix the lens group 80 in position, because each corner 8 1 of the lens group 80 can fit into the corresponding L-shaped positioning seat 67. The lens group 80 has a lens 8 4 fixed in a lens holder 82, and each corner 81 is a part of the lens holder 82. The combination of the corner 8 1 and the L-shaped positioning base 6 7 ensures that the lens 8 4 is positioned above the first opening 6 2. The lens group 80 also has a folding plate 8 6; when the lens group element 80 is positioned using the L-shaped positioning seat 6 7

Page 8 504638 V. Description of the invention (6) When it is above the first opening 62, the folding plate 86 will cover one side of the light source base 66 and form a roof shape. The folding plate 86 and the light source base 66 will form a hollow structure 101, and the light source 70 will be placed therein. The lens group 8 〇 itself is a one-piece structure ', which is made of high-quality, clear and transparent plastic. The light source 70 is a light-emitting diode, and is mounted on the circuit board 90 with a wire 72. The lead wire 72 is long enough for the light-emitting diode 70 to extend into the second opening 92 on the circuit board 90. The light-emitting diode 70 will pass through the circuit board 90 along the second opening 92, extend into the hollow structure 10i formed by the folding plate 86 and the light source holder 66, and make the light-emitting diode 70 be just right. Placed in the light source holder 6 6. Then, the circuit board 90 will be fixed on the bottom case 60 with a fixing error 69, and the lens group 80 is located below the circuit board 90. When the circuit board 90 is fixed by the fixing clip 69, it can also prevent the lens group 80 from running out of the L-shaped positioning seat 67. That is, ^ ί ^ group 8 〇 is cool between the circuit board 90 and the bottom case 60. Therefore, _ 疋 7 and the circuit board 90 will fix the lens group 80 to the bottom case 60. Shooting $ = During the first optical mouse 50, the light 1 1 2 is the light from the angle of the light emitting diode 70 to the body 70. The travel direction of 112 is determined by the light emitting diode 6 6 氺 * and The angle of the light-emitting diode 70 is again formed by the light source. In addition, the hollow structure where the light-emitting diode 70 is located will also go to Putian I 'to prevent light from directly touching the light sensor 100. In general, the light ray 112 is directly incident on the plane 51 and is modulated by the plane 51. When shooting, the incident front line 11 2 is irradiated by the surface of the plane 5 1 and becomes the light ray 13. Light 11 3 will travel to the mirror

504638 V. Description of the invention (7) Tablet 8 4. The lens 8 4 will focus the light 11 3, and the focused light 11 3 will pass through the second opening 92 of the circuit board 90 to the light sensor 100. See Figure 7. Fig. 7 is a partial exploded view of another embodiment of the optical system of the optical mouse 50 in the optical mouse 50. The optical system 2000 has the same operating principle as the first embodiment of the optical system 100 in the optical mouse of the present invention; however, in the optical system 200, the 'circuit board 2 1 0 is fixed to the bottom with screws 2 0 3 Shell 2 2 0 on. The screw 2 0 3 will pass through the screw hole 2 7 on the circuit board 2 1 0 and lock into the fixing post 2 5 of the bottom case 2 2 0. In addition, the lens group 230 has no folding plate and the light source base 2 2 5 forming a hollow structure. In contrast, in the optical system 2000, a side of the light source base 225 itself 2 2 6, an inclined top 2 2 8 and an inclined bottom surface 2 2 4 form a hollow structure. That is to say, the function of the light source holder 2 2 5 is exactly the same as the hollow structure 101 of the aforementioned optical system 11 0. In other words, the light source holder 2 2 5 can not only form a light shield itself, protect the light sensor 2 丨 5 from receiving light directly from the light source 240, but also maintain the light source 2 in the bottom case 2 2 0 4 0 degrees. Compared with the conventional technology, in the optical system of the optical mouse of the present invention, the reflecting surface does not need to reflect light from the light source to the plane on which the optical mouse slides, but transmits the light directly through the first opening of the bottom case. Incident on a plane. This helps reduce the overall cost of the optical system. The light source of the optical system in the present invention can be scattered into a light source holder; and the design of the light source holder can not be used as a light shield, and can also ensure that the light source has a suitable volume in the bottom case of the optical mouse Angle. ^

504638

Page 11 504638 Brief description of the diagram Brief description of the diagram: Figure 1 is a bottom view of a conventional optical mouse. Figure 2 is a partial exploded view of the optical system of the conventional optical mouse in Figure 1. Figure q Figure 3 is a side view of the optical system in Figure 2. FIG. 4 is a bottom view of the optical mouse of the present invention. FIG. 5 is a partial exploded view of the optical system of the optical mouse in FIG. 4. FIG. 6 is a side view of the optical system in FIG. 5. FIG. 7 is an exploded view of an optical system of another embodiment of the optical mouse in FIG. 4. FIG. Symbol description: 50 optical mouse 53 cable 60 ^ 220 bottom case 62 first opening 64 bottom 6 6 '225 light source base 67 L-shaped positioning base 69 fixing clip 70 ~ 240 light source 72 lead 80, 230. lens group Element 81 corner 82 lens holder 84 lens 86 folding plate 90 ~ 210 circuit board 101 hollow structure 1 12 ~ 113 light 203 screw 205 fixing post

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Claims (1)

504638 6. Scope of patent application 1. An optical mouse, comprising: a bottom case with a first opening thereon; a lens group provided above the first opening; a circuit board provided at Above the lens group, it is used to control the operation of the mouse and fix the lens group to the bottom case; a light source is used to generate light; a light sensor is used to detect the light emitted by the light source ; And a light source base, which is arranged on the bottom case, and is provided with an inclined plane for carrying the light source; wherein the circuit board fixes the light source on the inclined plane of the light source base so that the light source emits The light can directly pass through the first opening and pass through the first opening to the light sensor after reflection. 2. For example, the optical mouse according to the scope of the patent application, wherein the bottom case is further provided with at least one L-shaped positioning base for fixing the position of the lens group. 3. For example, the optical mouse of the scope of patent application, wherein the lens group includes a lens and a lens holder, the lens is set in the lens holder, and the lens holder is not sweetened by the bottom case and the circuit Between the boards. 4. For example, the optical mouse of item 3 of the patent application, wherein the lens group φ further includes a cantilever for covering one side of the light source base to form a hollow structure with the light source base, and the light source is placed on The hollow structure. Page 14 504638 6. Scope of patent application 5. For example, the optical mouse in the scope of patent application No. 4 wherein the hollow structure is used to block part of the light generated by the light source. 6. The optical mouse according to item 1 of the patent application scope, wherein the light source holder has a hollow structure. 7. The optical mouse of item 6 of the patent application, wherein the hollow structure is used to block part of the light generated by the light source. 8. For example, the optical mouse of the scope of patent application, wherein the circuit board has a second opening, the light sensor is disposed above the second opening, and the reflected light will pass through the lens group And the second opening is passed to the light sensor. 9. The optical mouse according to item 8 of the patent application, wherein the light source is disposed on the light source base so as to penetrate the second opening. 10. The optical mouse according to item 1 of the patent application scope, wherein the light source is a light emitting diode. 11. The optical mouse according to item 1 of the patent application scope, wherein the bottom case additionally contains φ containing at least one fixing clip for clamping the circuit board. 1 2. If the optical mouse of the first item of the scope of patent application, it further includes a plurality Page 15 504638 Page 16