Electromagnetic shielding mouse

Abstract

The invention discloses an electromagnetic shielding mouse, which comprises an upper device, a trackball, an identification part, a left-right key device and an electromagnetic shielding body; a receiving part is arranged on the upper surface of the upper device, and a first cutoff waveguide tube and a second cutoff waveguide tube are arranged on both sides of the receiving part; the trackball is accommodated in the receiving part; the identification part comprises a light signal generating device, an incident transmission device, a diffuse reflection light transmission device and an identification device to identify the movement of the trackball, and the upper end of the identification part is arranged at the bottom end of the receiving part; the left-right key device comprises left-right keys, a guide rod and a micro switch, the guide rods of the left key and the right key are respectively arranged in the first cutoff waveguide tube and the second cutoff waveguide tube, and the left key and the right key are respectively arranged above the first cutoff waveguide tube and the second cutoff waveguide tube; the electromagnetic shielding body is arranged below the upper device, and the generating device, the identification device and the micro switch are arranged in the electromagnetic shielding body.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic shielding, and in particular to an electromagnetic shielding mouse. Background Art

[0002] As a data and information processing device, the mouse has become an indispensable part of the computer. The information exchange between the mouse and the computer host is carried out through electromagnetic waves, and ordinary mice are not shielded, so these electromagnetic waves will be intentionally or unintentionally radiated into the surrounding space.

[0003] Since electromagnetic radiation signals carry information processed in the computer, they can easily lead to information leaks. Therefore, in order to achieve information security as much as possible, it is necessary to protect the mouse from electromagnetic leakage.

[0004] An anti-interference, low-radiation mouse can be called a TEMPEST mouse. Today, the TEMPEST technology of the mouse mainly adopts the following technical measures:

[0005] 1. Filtering technology

[0006] Filtering is a very important technology in TEMPEST. Filtering can effectively reduce and suppress electromagnetic radiation. However, when using filters, various factors such as the filter's insertion loss, internal impedance, signal processing capability, tunability, signal distortion, cost, and ability to suppress unwanted signals must be carefully considered.

[0007] 2. Wiring and component combination

[0008] The layout of components and arrangement of lines on the printed circuit board are very important. Necessary isolation measures should be taken to keep wires carrying different source currents away from each other to reduce harmful coupling between the wires. To this end, the length of the wiring on the circuit board and the lead of the components should be minimized. Multi-layer wiring and surface mounting technology are usually used, and large-scale integrated circuits are selected to reduce the radiation of the line. When designing a mouse circuit board with complex internal circuits, avoid drastic changes in the wiring when arranging the wiring. Use balanced wiring as much as possible, and set a ground plane for each layer of signal wiring to reduce the generation of interference signals.

[0009] 3. Red / Black Isolation

[0010] "Red" means that it carries sensitive information, and electromagnetic protection has very strict restrictions on the protection of red signals; "black" means that it does not carry sensitive information, and electromagnetic protection is relatively loose for black signals. The red and black are separated in the mouse to prevent the sensitive information carried by the red signal from being transmitted to the black signal through wired or wireless means, thereby causing the leakage of sensitive information.

[0011] 4. Use noise interference sources

[0012] This technology mainly uses two methods to reduce the possibility of electromagnetic information leakage. One method is to place a noise-generating jammer next to a device such as a mouse, so that the noise generated by the jammer and the electromagnetic information radiation generated by the device leak outward together, making it difficult for the useful information leakage generated by the computer device to be received and restored; the other method is to place the device that processes important information in the middle, and place some devices that process general information around it, so that the information leakage generated by these devices radiates outward together, thereby achieving the goal of making it difficult for important information to be received and restored.

[0013] 5. Use shielding technology

[0014] Shielding is a basic measure in TEMPEST technology. Its purpose is, first, to limit the electromagnetic information radiated from the inside to the surrounding space; second, to prevent the radio frequency interference in the surrounding space from entering the inside of the equipment. TEMPEST technology has very high requirements for shielding, and generally requires starting from the printed circuit board. The key to shielding lies mainly in the physical properties of the shielding material, especially the great influence of metal on the shielding effect. Generally speaking, the shielding shell structure of the equipment is mostly designed with metal, and the shielding layer of the cable is mostly composed of a metal mesh with high conductivity. When the cable shielding layer needs to achieve both electric field shielding and magnetic field shielding, a combination of materials with high conductivity and high magnetic permeability is generally used as the shielding layer of the cable.

[0015] Since the electric pulses in the computer are transmitted to the mouse board through the mouse cable, and the spectrum of the electric pulses is very wide (usually the frequency range is from 150kHz to 10GHz), the electromagnetic shielding effectiveness of the mouse against electromagnetic signals transmitted from other devices in the frequency range of 150kHz to 10GHz can only reach about 60dBuV / m. Its performance is far from meeting the requirements of information equipment with strict electromagnetic leakage.

[0016] Therefore, it is necessary to develop an electromagnetic shielding mouse for an electromagnetic shielding device that can solve the above technical problems.

[0017] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0018] A main purpose of the present invention is to overcome at least one defect of the above-mentioned prior art and provide an electromagnetic shielding mouse to improve engine performance.

[0019] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0020] According to one aspect of the present invention, an electromagnetic shielding mouse is provided, wherein the electromagnetic shielding mouse comprises an upper device, a trackball, an identification unit, a left and right key device and an electromagnetic shielding body; a housing portion is provided on the upper surface of the upper device, and a first cutoff waveguide tube and a second cutoff waveguide tube are provided on both sides of the housing portion; the trackball is accommodated in the housing portion; the identification unit comprises a light signal generating device, an incident transmission device, a diffuse reflection light transmission device and a recognition device to identify the movement of the trackball, and the upper end of the identification unit is arranged at the bottom end of the housing portion; the left and right key device comprises left and right keys, a guide rod and a micro switch, the guide rods of the left key and the right key are respectively arranged in the first cutoff waveguide tube and the second cutoff waveguide tube, and the left key and the right key are respectively arranged above the first cutoff waveguide tube and the second cutoff waveguide tube; the electromagnetic shielding body is arranged below the upper device, and the generating device, the identification device and the micro switch are arranged in the electromagnetic shielding body.

[0021] According to one embodiment of the present invention, an inverted V-shaped cutoff waveguide with a top opening is provided between the accommodating portion and the metal shielding body, the first branch of the inverted V-shaped cutoff waveguide is the incident light transmission device, and the second branch is the diffuse reflection light transmission device.

[0022] According to one embodiment of the present invention, a vertical cutoff waveguide is provided between the accommodating portion and the metal shielding body, and the incident light transmission device and the diffuse reflection light transmission device transmit the incident light and the diffuse reflection light respectively through the vertical cutoff waveguide.

[0023] According to one embodiment of the present invention, the guide rod is a non-metallic guide rod.

[0024] According to one embodiment of the present invention, the generating device is a laser generating device.

[0025] According to one embodiment of the present invention, the identification device is a photosensitive module directly connected to the lower end of the second branch, and the generation device is directly connected to the lower end of the first branch.

[0026] According to one embodiment of the present invention, the generating device is connected to the lower end of the first branch through a first light transmission channel, and the identifying device is a photosensitive module, which is connected to the lower end of the second branch through a second light transmission channel.

[0027] According to one embodiment of the present invention, the first optical transmission channel is a first optical cable.

[0028] According to one embodiment of the present invention, the second optical transmission channel is a second optical cable.

[0029] According to one embodiment of the present invention, the accommodating portion is a spherical groove, and the center of the trackball is located below the upper end surface of the spherical groove.

[0030] It can be seen from the above technical scheme that the advantages and positive effects of the present invention are: in order to meet the requirements for safe use of information equipment with strict requirements on electromagnetic leakage, we have developed a special mouse for electromagnetic shielding, and its working principle is: organically combining the working principle of laser mouse with the tracking method of trackball mouse. The distance between the laser emission source, the receiving end of the CMOS imaging sensor and the reflecting surface is lengthened, so that the laser emission light transmission and diffuse reflection light transmission are carried out in a metal tube (cutoff waveguide) of a certain length, and the left and right buttons of the mouse are also operated through the cutoff waveguide, and the cutoff waveguide is reliably combined with the shielding body, so as to achieve the goal of high-performance shielding of the mouse electromagnetic signal. The electromagnetic shielding mouse proposed by the present invention has high shielding efficiency, is easy to manufacture and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts.

[0032] Figure 1 It is a partial cross-sectional structural schematic diagram of the electromagnetic shielding mouse of the present invention;

[0033] Figure 2 Another partial cross-sectional structural schematic diagram of the electromagnetic shielding mouse of the present invention;

[0034] Figure 3 It is a schematic diagram of the setting method of the trackball of the present invention.

[0035] The reference numerals are described as follows:

[0036] 1 Trackball

[0037] 10 Support block

[0038] 2 upper unit

[0039] 20 Accommodation portion

[0040] 21 First cutoff waveguide

[0041] 22 Second cutoff waveguide

[0042] 23 First Branch

[0043] 24 Second Branch

[0044] 25 Vertical cutoff waveguide

[0045] 3. Identification

[0046] 31 Generating device

[0047] 32 Incident light

[0048] 33 Diffuse light

[0049] 34 Diffuse Normal

[0050] 35 Photosensitive module

[0051] 36 First Optical Cable

[0052] 37 Second optical cable

[0053] 4 left and right button device

[0054] 41 Left button

[0055] 42 Right button

[0056] 43 Guide rod

[0057] 44 Spring

[0058] 45 Micro switch

[0059] 5 Metal shield

[0060] 51 Cover

[0061] O Center DETAILED DESCRIPTION

[0062] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0063] When describing elements of the present invention or preferred embodiments thereof, the words "a," "an," "the," and "said" are intended to mean that there are one or more elements. The terms "comprising," "including," and "having" are intended to be open ended and mean that there may be additional elements in addition to the listed elements.

[0064] The electromagnetic shielding mouse of the embodiment of the present invention mainly comprises an upper device 2, a trackball 1, an identification unit 3, a left and right button device 4 and an electromagnetic shielding body. Figures 1 to 3 , Figure 1 A partial cross-sectional structural schematic diagram of an electromagnetic shielding mouse that can embody the principle of the present invention is representatively shown in FIG. Figure 2Another partial cross-sectional structural schematic diagram of an electromagnetic shielding mouse that can embody the principle of the present invention is representatively shown in FIG. Figure 3 1 is a schematic diagram of a trackball 1 of an electromagnetic shielding mouse that can embody the principles of the present invention. In conjunction with the above drawings, the main structures of the electromagnetic shielding mouse proposed by the present invention are described in detail below.

[0065] like Figures 1 to 3 As shown, in this embodiment, a receiving portion 20 is provided on the upper surface of the upper device 2, and a first cutoff waveguide 21 and a second cutoff waveguide 22 are provided on both sides of the receiving portion 20. Among them, an inverted V-shaped cutoff waveguide with a top opening is provided between the receiving portion 20 and the metal shielding body 5, and the first branch 23 of the inverted V-shaped cutoff waveguide is an incident light transmission device, wherein the incident light 32 exemplarily shows the baseline of the incident light through the light transmission channel (such as an optical cable or a metal tube, or no light transmission channel is provided), and the second branch 24 is a diffuse reflection light transmission device, wherein the diffuse reflection light 33 exemplarily shows the baseline of the reflected light formed by the incident light reflected by the trackball 1 through the light transmission channel (such as an optical cable or a metal tube, or no light transmission channel is provided). A vertical cutoff waveguide 25 is provided between the receiving portion 20 and the metal shielding body 5, and the incident light transmission device and the diffuse reflection light transmission device transmit the incident light and the diffuse reflection light respectively through the vertical cutoff waveguide 25, wherein the diffuse reflection normal 34 exemplarily shows the vertical line of the theoretical reflection surface. In addition, in the present embodiment, the accommodating portion 20 is substantially in the form of a spherical groove structure for accommodating the trackball 1 in the accommodating portion 20, and the center O of the trackball 1 is preferably located below the upper end surface of the spherical groove. In addition, a plurality of support blocks 10 are provided on the inner wall of the spherical groove of the accommodating portion 20 to assist in supporting the trackball 1 and facilitate its movement. It is easy for a person skilled in the art to understand that in order to set up the upper device 2 and accommodate the trackball 1 in the upper device 2, a variety of modifications, additions, substitutions, deletions or other changes are made to the structure of the upper device 2 or the arrangement of the trackball 1, and these changes are still within the scope of the principle of the electromagnetic shielding mouse proposed by the present invention.

[0066] like Figure 1 and Figure 2As shown, in this embodiment, the identification unit 3 mainly includes a light signal generating device 31, an incident transmission device, a diffuse reflection light transmission device and an identification device to identify the movement of the trackball 1. The upper end of the identification unit 3 is arranged at the bottom end of the above-mentioned accommodating portion 20. Among them, the generating device 31 is preferably a laser generating device. The generating device 31 is connected to the lower end of the first branch 23 through a first optical cable 36, and the identification device is preferably a photosensitive module 35, which is connected to the lower end of the second branch 24 through a second optical cable 37. It is easy for those skilled in the art to understand that in order to set the above-mentioned identification unit 3, a variety of modifications, additions, substitutions, deletions or other changes are made to the structure of the identification unit 3, and these changes are still within the scope of the principle of the electromagnetic shielding mouse proposed by the present invention. For example, in another exemplary embodiment of the present invention, the identification device can still be preferably a photosensitive module 35, but it is directly connected to the lower end of the second branch 24 instead, and the generating device 31 is directly connected to the lower end of the first branch 23 instead. For example, in another exemplary embodiment of the present invention, the first optical cable 36 can also be replaced by an optical transmission medium of other materials or structures, and used as a first optical transmission channel connecting the generating device 31 and the first branch 23, such as a metal pipe, etc., or the first optical transmission channel is not provided and the light is allowed to propagate naturally, but the present invention is not limited thereto. Similarly, the second optical cable 37 can also be replaced by an optical transmission medium of other materials or structures, and used as a second optical transmission channel connecting the identification device and the second branch 24, such as a metal pipe, etc., or the second optical transmission channel is not provided and the light is allowed to propagate naturally, but the present invention is not limited thereto.

[0067] like Figure 1 and Figure 2 As shown, in this embodiment, the left and right key device 4 includes a left key, a right key, a guide rod 43, a spring 44 and a micro switch 45. Among them, the guide rods 43 of the left key 41 and the right key 42 are respectively arranged in the first cutoff waveguide tube 21 and the second cutoff waveguide tube 22. The left key 41 and the right key 42 are respectively arranged above the first cutoff waveguide tube 21 and the second cutoff waveguide tube 22. The spring 44 is preferably a reset spring, which is arranged between the guide rod 43 and the micro switch 45. When the user touches the left key 41 or the right key 42 to press the guide rod 43 downward, the spring 44 is compressed and accumulates an elastic potential energy. When the user releases, the elastic potential energy is released, and the spring 44 provides an elastic restoring force to the guide rod 43 to reset it. In addition, in this embodiment, the guide rod 43 is preferably a non-metallic guide rod 43. It is easy for those skilled in the art to understand that in order to set the left button 41 and the right button 42, various modifications, additions, substitutions, deletions or other changes are made to the structure or material selection of the left and right buttons, and these changes are still within the scope of the principle of the electromagnetic shielding mouse proposed in the present invention.

[0068] like Figure 1 and Figure 2As shown, in this embodiment, the electromagnetic shielding body is arranged below the upper device 2, and the generating device 31, the identifying device and the micro switch 45 are all arranged in the electromagnetic shielding body.

[0069] In summary, in order to meet the requirements of safe use of information equipment with strict requirements on electromagnetic leakage, the working principle of the electromagnetic shielding mouse proposed by the present invention is roughly as follows: the working principle of the laser mouse is organically combined with the tracking method of the trackball mouse. The distance between the laser emission source, the receiving end of the CMOS imaging sensor and the reflecting surface is lengthened, so that the laser emission light transmission and the diffuse reflection light transmission are carried out in a metal tube (cutoff waveguide) of a certain length, the left and right buttons of the mouse are also operated through the cutoff waveguide, and the cutoff waveguide is reliably combined with the shielding body, thereby achieving the goal of high-performance shielding of the mouse electromagnetic signal. The electromagnetic shielding mouse proposed by the present invention has high shielding efficiency, is easy to manufacture and has low cost.

[0070] It should be understood that the multiple examples described above can be utilized in multiple directions (such as tilted, inverted, horizontal, vertical, etc.) and in multiple configurations without departing from the principles of the present invention. The embodiments shown in the accompanying drawings are shown and described only as examples of effective application of the principles of the present invention, and the present invention is not limited to any specific details of these embodiments.

[0071] Of course, once the above description of the representative embodiments is carefully considered, it will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions and other changes may be made to these specific embodiments, and these changes are within the scope of the principles of the present invention. Therefore, the foregoing detailed description should be clearly understood to be given only in an illustrative and exemplary manner, and the spirit and scope of the present invention are limited only by the appended claims and their equivalents.

Claims

1. An electromagnetic shielding mouse, It is characterized in that The electromagnetic shielding mouse comprises: The upper device has an accommodating portion on its upper surface, the accommodating portion is a spherical groove, and a first cutoff waveguide and a second cutoff waveguide are arranged on both sides of the accommodating portion; A trackball is accommodated in the accommodation portion, wherein the center of the trackball is located below the upper end surface of the spherical groove; The recognition part includes a light signal generating device, an incident transmission device, a diffuse reflection light transmission device and a recognition device, so as to recognize the movement of the trackball, wherein the generating device is a laser generating device, and the upper end of the recognition part is arranged at the bottom end of the accommodating part; A left and right key device, comprising left and right keys, a guide rod and a micro switch, wherein the guide rods of the left key and the right key are respectively arranged in the first cutoff waveguide tube and the second cutoff waveguide tube, and the left key and the right key are respectively arranged above the first cutoff waveguide tube and the second cutoff waveguide tube; and An electromagnetic shielding body is arranged below the upper device, and the generating device, the identifying device and the micro switch are arranged in the electromagnetic shielding body; Wherein, the generating device and the identifying device are both located inside the electromagnetic shielding body, and the trackball is located outside the electromagnetic shielding body; Among them, an inverted V-shaped cutoff waveguide tube with a top opening is arranged between the accommodating portion and the electromagnetic shielding body, the first branch of the inverted V-shaped cutoff waveguide tube is the incident light transmission device, the second branch of the inverted V-shaped cutoff waveguide tube is the diffuse reflection light transmission device, the first branch and the second branch both pass through the electromagnetic shielding body, and the two ends of the first branch and the second branch are respectively located on the inner side and the outer side of the electromagnetic shielding body.

2. The electromagnetic shielding mouse according to claim 1, It is characterized in that The guide rod is a non-metallic guide rod.

3. The electromagnetic shielding mouse according to claim 1, It is characterized in that The inverted V-shaped cutoff waveguide tube is arranged between the accommodating portion and the electromagnetic shielding body; wherein the identification device is a photosensitive module directly connected to the lower end of the second branch, and the generating device is directly connected to the lower end of the first branch.

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