JP5460784B2 - Optical dustproof mouse - Google Patents

Description

  The present invention relates to a mouse, and more particularly to an optical dustproof mouse having a dustproof cover.

  An optical mouse is an important input device for a personal computer because it controls an input signal to the personal computer. The optical mouse is placed on the surface of the object, the image of the surface of the object is acquired by the optical detection module, and the cursor on the screen of the display device corresponds to the fluctuation of the surface image acquired by moving the mouse. And move it. The sensitivity and accuracy of the cursor on the screen of the display device relate to whether or not the optical detection module of the optical mouse reliably acquires an image of the surface of the object.

  Since the optical detection module provided at the bottom of the conventional optical mouse has no shielding object between the surface of the object and the optical mouse is used, it is easy for dirt and other dirty objects to adhere to it. Therefore, there is a drawback that the sensitivity and accuracy of the cursor on the screen of the display device are reduced.

  Therefore, the applicant of the present invention has intensively studied to improve the above-described drawbacks, and as a result, has completed the present invention having an advantageous configuration that can effectively solve the above-described disadvantages. .

  The object of the present invention is to increase the sensitivity and accuracy of the cursor on the screen of the display device due to the failure of the optical detection module to reliably acquire an image of the surface of the object due to the attachment of filth such as dust to the optical detection module. An object of the present invention is to provide an optical dust-proof mouse that can eliminate the disadvantage of reducing it.

  An optical dustproof mouse according to the present invention includes a mouse body, an optical detection module, and a dustproof cover. The mouse body has a housing space inside. A through hole penetrating from the accommodation space to the outside of the mouse body is provided below the accommodation space. The optical detection module is accommodated in an accommodation space and includes an optical transmitter, an optical lens group, and an optical receiver. The light transmitter faces the optical lens group. The optical receiver faces the through hole. The optical lens group is provided between the optical transmitter and the optical receiver. The dustproof cover is provided in the through hole and includes a transparent plate and a first coating layer. The first coating layer is provided on one surface of the transparent plate.

  In the optical dustproof mouse according to the present invention, a dustproof cover is provided between the optical detection module and the outside of the mouse body. It is possible to eliminate the drawback that the sensitivity and accuracy of the cursor on the screen of the display device are reduced due to a problem that the image of the surface of the object cannot be reliably acquired.

1 shows a three-dimensional exploded view of an optical dustproof mouse according to the present invention. FIG. 3 shows a three-dimensional view of an optical dustproof mouse according to the present invention. FIG. 1 is a cross-sectional view of an optical detection module of an optical dustproof mouse according to the present invention. 1 is a cross-sectional view of a dustproof cover of an optical dustproof mouse according to the present invention.

  As shown in FIGS. 1 to 3, the optical dustproof mouse according to the present invention includes a mouse body 1, an optical detection module 2, and a dustproof cover 3.

  The mouse body 1 has an accommodation space 11 inside. A through hole 12 penetrating from the accommodation space 11 to the outside of the mouse body 1 is provided below the accommodation space 11. A plurality of pad portions 13 are provided below the mouse body 1. The through hole 12 has a concave engagement portion 121. The dust cover 3 is fixed to the engaging portion 121. By increasing the height of the mouse, the pad portion 13 can prevent damage to parts caused by friction between the dust cover 3 or other parts below the mouse and the surface of the object on which the mouse is placed.

  The optical detection module 2 is accommodated in the accommodation space 11. The optical detection module 2 includes an optical transmitter 21, an optical lens group 22, and an optical receiver 23. The optical transmitter 21 faces the optical lens group 22. The optical receiver 23 faces the through hole 12 of the mouse body 1. The optical lens group 22 is provided between the optical transmitter 21 and the optical receiver 23. In the present embodiment, a light emitting diode (LED) is used as the optical transmitter 21, but the present invention is not limited to this, and for example, a laser or the like may be used. Preferably, the wavelength range of light emitted from the optical transmitter 21 is 400 nm (nanometers) to 700 nm which is the wavelength range of visible light.

As shown in FIGS. 1 and 4, the dust cover 3 is provided in the through hole 12 of the mouse body 1. The dust cover 3 includes a transparent plate 31, a first coating layer 32, a second coating layer 33, and a printing unit 34. The first coating layer 32 is provided on one surface of the transparent plate 31. The printing unit 34 is provided on the outer peripheral edge of the first coating layer 32 and has an effect of improving the aesthetic appearance. An adhesive material for adhering to the engaging portion 121 of the through hole 12 is applied to the printing portion 34. The dust cover 3 is bonded to the engaging portion 121 of the through hole 12 of the mouse body 1. In the present embodiment, the transparent plate 31 is an acrylic plate, but is not limited to this, and may have a high light transmittance such as a glass plate. The purpose of providing the coating layer on the dust cover 3 is to improve the light transmittance of the dust cover 3. Therefore, in order to further improve the light transmittance of the dust-proof cover 3, the first coating layer 32 is provided on one surface of the transparent plate 31, and the second coating layer 33 is provided on the other surface of the transparent plate 32. You may be made to do. The refractive index of the first coating layer 32 and the second coating layer 33 is smaller than the refractive index of the transparent plate 31. In the present embodiment, the material of the first coating layer 32 and the second coating layer 33 may be silicon dioxide (SiO ₂ ), titanium dioxide (TiO ₂ ), or magnesium fluoride (MgF ₂ ).

  In the case of detecting the movement of the mouse, the optical dustproof mouse according to the present invention first irradiates the optical lens group 22 with light by the optical transmitter 21 of the optical detection module 2, and the light is transmitted through the optical lens group 22 multiple times. After being reflected and refracted, the light passes through the dust cover 3, is reflected by the surface of the object on which the optical dust-proof mouse is placed, passes through the dust cover 3 again, and enters the optical receiver 23. Thereby, the optical detection module 2 acquires the image of the surface of the object on which the optical dustproof mouse is placed according to the movement of the optical dustproof mouse, and the image of the surface of the object acquired by the movement of the optical dustproof mouse. Based on the fluctuation, the movement state of the optical dustproof mouse can be determined.

  In general, when light enters another medium from one medium, some light is reflected at the interface and some light is transmitted through the interface. Taking the acrylic plate as an example, when light enters the acrylic plate from the atmospheric environment, 4% of the light is reflected by the acrylic plate and 96% of the light is transmitted through the acrylic plate. If too much light is reflected, unnecessary scattered light is generated, which hinders the optical receiver 23 from acquiring an image of the surface of the object.

  On the other hand, when light passes through a transparent material, if fine particles are present inside the transparent material, light is scattered in all directions, resulting in a scattering phenomenon. The scattering phenomenon causes problems such as light loss and light interference, and therefore, there is a problem that the optical receiver 23 prevents the image of the surface of the object from being acquired.

  When light travels back and forth twice through the dust cover 3, the light is reflected four times on the upper surface and lower surface of the dust cover 3 and transmitted through the dust cover 3 twice. There is a problem that the light transmittance is too low and the reflectance becomes too high, and the accuracy of the image of the surface of the object acquired by the optical receiver 23 is reduced.

Therefore, in order to improve the transmittance of the dustproof cover 3, a coating layer is provided on the surface of the dustproof cover 3 of the present invention. According to the basic principle of electromagnetics, when light is incident perpendicularly from the medium n ₁ to the medium n ₂ , the mathematical expression representing the transmittance and reflectance of different media is as follows:

Typically, the coating layer material is magnesium fluoride (MgF2), its refractive index is 1.35, its atmospheric refractive index is 1.0, and acrylic has a refractive index of 1.5. is there. Substituting the above numbers into Equation 1, the following results are obtained.
When light is directly incident on the acrylic from the atmosphere, reflectivity = 4% and transmittance = 96%.
When light passes through the coating layer from the atmosphere and enters the acrylic, reflectance = 0.3% and transmittance = 99.7%.

  As can be seen from the above description, the dust-proof cover 3 having the coating layer can greatly improve the transmittance for transmitting light, and reduces the accuracy of the image of the surface of the object acquired by the optical receiver 23 by the scattered light. Problems can be reduced.

  In addition, the thickness of the coating layer is adjusted so that the phase difference of the reflected light generated when the light passes through the upper surface and the lower surface of the coating layer is ½ wavelength (ie, opposite phase). Also good. Accordingly, since the reflected light can be canceled by generating destructive interference between the two reflected lights, an antireflection effect can be achieved.

As a manufacturing method of the coating layer, for example, physical vapor deposition (PVD) may be used. When the physical vapor deposition method is used, the coating material is changed from a solid state to a gaseous state or an ionic state, and the gaseous or ionic state material is deposited on the surface of the transparent plate 31 from the vapor deposition source through the vapor deposition environment. This produces a coating layer. In addition, the process for manufacturing the coating layer is performed in a high vacuum environment (10 ⁻⁵ torr) so that the coating layer has high purity.

  Further, in the present invention, since one side of the dustproof cover 3 is fixed to the mouse body 1 by adhesion, when the dustproof cover 3 becomes damaged or dirty, the dustproof cover 3 is removed to form a new dustproof cover 3. By replacing it, the dust cover 3 can always maintain the best light transmittance.

  In the optical dustproof mouse according to the present invention, since the dustproof cover 3 is provided between the optical detection module 2 and the outside of the mouse main body 1, the optical detection module 2 is optically affected by dirt and other unclean substances attached thereto. It is possible to eliminate the disadvantage that the sensitivity and accuracy of the cursor on the screen of the display device are reduced due to the problem that the type detection module 2 cannot reliably acquire the image of the surface of the object.

  The above-described embodiments are merely preferred embodiments of the present invention, and do not limit the scope of the present invention. Equivalent changes and additions made based on the specification and drawings of the present invention will Are intended to be included within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Mouse main body 11 Accommodating space 12 Through-hole 121 Engaging part 13 Pad part 2 Optical detection module 21 Optical transmitter 22 Optical lens group 23 Optical receiver 3 Dust-proof cover 31 Transparent plate 32 First coating layer 33 Second coating Layer 34 printing section

Claims (7)

Includes mouse body, optical detection module and dust cover,
The mouse body has a housing space inside, and has a through hole that penetrates from the housing space to the outside of the mouse body below the housing space, and the through hole has a concave engaging portion. And
The optical detection module is housed in the housing space, and includes an optical transmitter, an optical lens group, and an optical receiver.
The optical transmitter is opposed to an optical lens group, the optical receiver is opposed to the through hole, and the optical lens group is provided between the optical transmitter and the optical receiver,
The dust cover is provided in the through hole, and includes a transparent plate , a first coating layer, and a printing unit ,
The first coating layer is provided on one surface of the transparent plate , the printing part is provided on an outer peripheral edge of the first coating layer, and is adhered to the engaging part of the through hole. Features an optical dustproof mouse.   The optical dustproof mouse according to claim 1, wherein the transparent plate is a glass plate or an acrylic plate.   The optical dustproof mouse according to claim 1, wherein the optical transmitter is a light emitting diode.   The optical dustproof mouse according to claim 1, wherein the wavelength of light emitted from the optical transmitter is 400 nm to 700 nm. The dust cover further comprises a second coating layer;
2. The optical dustproof mouse according to claim 1, wherein the second coating layer is provided on the other surface of the transparent plate facing the one surface on which the first coating layer is provided. . The optical dustproof mouse according to claim 5 , wherein the refractive index of the first coating layer and the second coating layer is smaller than the refractive index of the transparent plate. The material of the first coating layer and the second coating layer of claim 5, wherein the silicon dioxide _(SiO 2), titanium dioxide _(TiO 2), or magnesium fluoride (MgF ₂₎ Optical dustproof mouse.

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