Infrared switch key and keyboard

Abstract

This utility model relates to the field of keyboard technology, specifically providing an infrared switch button, including an upper shell, a spindle, a spring-loaded mechanism, and a fixed base. The upper shell is equipped with a light guide; the spindle is disposed in the fixed base and is movable up and down relative to the fixed base; when the spindle moves downwards through the bottom of the fixed base, it blocks one or more infrared light paths. This application also provides a keyboard. The infrared switch button of this application not only makes the characters very clear in terms of light transmission, but also has two symmetrical light guides that can simultaneously match the upper and lower LED positions, allowing both LEDs to transmit light simultaneously. The centrally symmetrical spindle design makes it easier to insert and replace the spindle, eliminating the problem of incorrect insertion. The spindle is movable relative to the fixed base, and during keystrokes, it does not collide or contact any components within the infrared switch button, resulting in a long service life.

Description

Technical Field

[0001] This utility model relates to the field of input device technology, and more specifically, to an infrared switch button and keyboard. Background Technology

[0002] With the development and application of intelligent technology, the operating panels of many devices have been upgraded to touch screens, or directly connected to terminal devices for operation. However, considering the failure rate, cost, and user preferences of intelligent technology, button input control, with its advantages of low cost, low failure rate, simple and direct operation, and flexible application, cannot be completely replaced by intelligent control in certain scenarios, and therefore still occupies a portion of the market.

[0003] Computer keyboards are very common office equipment, used by many people every day. Currently, most existing keys are designed using physical structures or technologies such as magnetism and optics. The main structures are triggered by mechanical contacts, capacitive sensing, or magnetic sensing. However, mechanical contacts experience wear during vertical movement, and capacitive and magnetic sensing are prone to performance instability or accuracy degradation after prolonged use. Therefore, there is a need for a new type of input device that offers a long lifespan, high-precision and stable input, and fast triggering speed to meet user needs. Utility Model Content

[0004] The purpose of this application is to provide an infrared switch button and keyboard that can not only emit light, but also will not experience contact wear after long-term use, nor will it suffer from performance instability or decreased accuracy, and has a long service life.

[0005] In a first aspect, embodiments of this application provide an infrared switch button, including: an upper housing, a shaft, a spring-loaded device, and a fixed base. The upper housing is provided with two light guides. The shaft is disposed in the fixed base and is movable up and down relative to the fixed base. When the shaft moves downward, it passes through the bottom of the fixed base and is used to block one or more infrared light paths.

[0006] Furthermore, there are two light guides, symmetrically arranged, and both are made of transparent material. Each light guide has an arc-shaped cross-section and a uniformly arranged scattering surface inside.

[0007] Furthermore, of the two symmetrically arranged light guides, one light guide corresponds to the upper lamp position, and the other light guide corresponds to the lower lamp position.

[0008] Furthermore, the light guide is integrally formed with the upper housing, or can be detachably installed on the upper housing; or the upper housing does not include the light guide, and a light-transmitting hole is provided at the corresponding position.

[0009] Furthermore, the lower end of the shaft has a columnar or conical profile and is either hollow or solid.

[0010] During use, the infrared switch button of this invention does not have any collision or contact between the shaft and any components within the infrared switch button. Even after long-term use, it will not experience contact wear, performance instability, or decreased accuracy, resulting in a long service life and providing users with a continuously improving and longer-lasting input device. Simultaneously, the shaft can be used to change the transmitted signal, reducing the reliance on physical components in existing technologies, making it more environmentally friendly, and lowering product manufacturing costs.

[0011] Furthermore, the spring-back device is disposed on the fixed base, and the spring-back device can reset the shaft core.

[0012] Secondly, this application also provides a keyboard, including the aforementioned infrared switch button.

[0013] Furthermore, the keyboard also includes:

[0014] A positioning plate, wherein the positioning plate is provided with positioning holes for fixing the base of the infrared switch button;

[0015] The circuit board is disposed on at least one set of opposite sides inside the keyboard. It includes multiple sets of infrared emitting units and multiple sets of infrared receiving units. The infrared emitting units and the infrared receiving units are arranged opposite each other. Multiple sets of infrared rays emitted by the multiple sets of infrared emitting units are received by the multiple sets of infrared receiving units, forming multiple infrared light grids with intersecting trigger light paths below the switch key operation area. When the shaft moves downward through the bottom of the fixed base, it enters the infrared light grid and blocks one or more infrared rays, thereby affecting the signal value of the blocked infrared light path.

[0016] Furthermore, each key in the keyboard is positioned beneath one or more infrared rays.

[0017] Furthermore, there are multiple infrared lines under each button, and they do not overlap.

[0018] The keyboard in this application uses infrared photoelectric technology, which reduces the reliance on physical components in the prior art, is more environmentally friendly, and can reduce product manufacturing costs.

[0019] Meanwhile, the keyboard boasts a simple structure, adjustable precision, high reliability, and low maintenance costs. Utilizing infrared technology for a non-contact, high-precision design offers the following advantages: fast infrared detection and response speed; high scan and feedback rates for the switches, significantly reducing latency; precise setting of key press and release travel values ​​for triggering, enabling rapid triggering, emergency stopping, rapid secondary triggering, and continuous triggering; and precise setting of dead zone values ​​to prevent accidental touches. It can be customized to meet individual user habits and needs, overcoming the inherent limitations of physical structure in balancing performance and lifespan. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the infrared switch button provided in an embodiment of this application;

[0022] Figure 2 A cross-sectional view of the infrared switch button provided in an embodiment of this application;

[0023] Figure 3 An exploded view of the infrared switch button hidden base provided in this application embodiment;

[0024] Figure 4 This is a schematic diagram of the solid shaft core of the infrared switch button provided in the embodiments of this application;

[0025] Figure 5 This is a schematic diagram of the hollow shaft core of the infrared switch button provided in the embodiments of this application;

[0026] Figure 6 This is a schematic diagram of the structure of a keyboard embodiment provided in this application. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the structure of one embodiment of the keyboard of this application. Figure 2 ;

[0028] Figure 8 This is an exploded view of one embodiment of the keyboard in this application;

[0029] Figure 9 This is a schematic diagram of another embodiment of the keyboard (including through holes) of this application;

[0030] Figure 10 This is an exploded view of another embodiment of a keyboard (including a through hole) according to this application;

[0031] Figure 11 This is a schematic diagram of the infrared optical path network under the keyboard of this application.

[0032] Figure Labels

[0033] 1. Through hole; 2. Circuit board; 3. Infrared emitting unit; 4. Infrared receiving unit; 5. Infrared switch button; 5a. Fixing base; 5a1. Upper housing; 5b. Shaft core; 5b1. Shaft body; 5b2. Mating cover; 6. Limiting base; 6a. Limiting plate; 6b. Limiting cylinder; 7. Springback device; 8. Positioning plate; 9. Positioning hole; 10. Upper opening; 11. Blocking part; 12. Snap-fit ​​spring piece; 13. Stop plate; 14. Snap-fit ​​protrusion; 15. Flange; 16. Springback part; 17. Abutment part; 18. Elastic abutment body; 19, 20: Light guide. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] like Figures 1-5As shown, in a first aspect, this application provides an infrared switch button 5, including: an upper housing 5a1, a shaft core, and a fixed base 5a. The upper housing 5a1 is provided with two light guides, which are symmetrically arranged and respectively disposed on both sides of the upper housing 5a1 for projecting light. The shaft core 5b is disposed in the fixed base 5a and is configured to move up and down relative to the fixed base 5a. When the shaft core 5b moves downward relative to the fixed base 5a, it can protrude through the bottom of 5a and block one or more infrared signals, thereby triggering a change in the transmitted signal.

[0037] Specifically, the two symmetrical light guides in this application can be matched with keyboard structures with different LED positions, such as upper and lower LED positions. Upper and lower LED positions refer to different light source locations, which directly determine which part of the keycap is illuminated, thus producing different lighting effects. The upper LED position can be defined as the LED beads on the circuit board illuminating the rear part of the keycap from bottom to top, suitable for keycaps with translucent top characters or transparent keycaps. The lower LED position can be defined as the LED beads on the circuit board illuminating the rear part of the keycap from bottom to top, suitable for keycaps with translucent front characters or transparent keycaps. When both the upper and lower LED positions on the circuit board are equipped with LED beads, the keyboard can be turned on individually or simultaneously via software, making the overall keyboard lighting cooler, more personalized, and more immersive.

[0038] Furthermore, the shaft core 5b does not come into contact with any component inside the infrared switch button 5 (such as the mechanical shaft core 5b in the prior art coming into contact with two pieces of metal when it moves up and down). After long-term use, there will be no contact wear, no performance instability or decrease in accuracy, and the service life is long.

[0039] In one embodiment, such as Figure 1 As shown, both light guides are made of transparent material, have an arc-shaped cross-section, and an irregular internal surface. This eliminates dark corners in the light and avoids glare from directly seeing bright spots in the light source, resulting in more uniform overall light emission. In other embodiments, the surface can be frosted or matte, which also makes the light emission softer and glare-free. The light guide can be integrally formed with the upper housing or it can be a detachable structure. For the integrally formed structure, the entire upper housing is made of transparent material. For the detachable structure, the upper housing can be made of opaque material.

[0040] In this embodiment, the light guide acts as a light distributor, mainly receiving strong light from the LED light source and scattering, diffusing, and guiding it to the entire keyboard area to ensure that every character on the keycap is evenly illuminated, avoiding obvious bright spots or dark areas. Of course, in other embodiments, light-transmitting holes are directly provided on the left and right sides of the upper housing 5a1. The light-transmitting hole on the left is used to match one of the upper and lower light positions, and the light-transmitting hole on the right is used to match the other of the upper and lower light positions.

[0041] In another embodiment, the light guide is detachably mounted on the upper housing, with its inner side fitting against the corresponding edge of the upper housing.

[0042] An infrared mesh is arranged in the horizontal plane below the infrared switch key 5. One or more infrared rays pass under each key. When the switch core 5b extends downwards, its end blocks one or more infrared rays. At this time, the corresponding infrared transmission signal is partially or completely blocked, triggering a command. With this configuration, the keyboard only requires infrared emitting units 3 and infrared receiving units 4 around the perimeter below the infrared switch key 5 (see reference). Figure 9 The infrared switch button 5 requires no electrical connections around it; simply fixing it to the keyboard is sufficient to achieve all its functions. The advantages are structural separation; the infrared switch button 5 is a purely mechanical structure, free from the influence of electrical connections, resulting in more stable performance. Furthermore, the absence of electrical connections extends its lifespan.

[0043] refer to Figure 2 The shaft core 5b includes a shaft body 5b1. A limiting base 6 is provided in the fixed base 5a to limit the movement of the shaft core 5b. The limiting base 6 includes a limiting cylinder 6b. The shaft body 5b1 is sleeved inside the limiting cylinder 6b, thereby achieving horizontal limiting, so that the shaft body 5b1 can move up and down along the limiting cylinder 6b. A spring-loaded device 7 is sleeved around the limiting cylinder 6b.

[0044] refer to Figure 2 The shaft core 5b also includes a mating cover 5b2 disposed on the outer periphery of the shaft body 5b1, and the mating cover 5b2 and the shaft body 5b1 are integrally formed. The limiting base 6 also includes limiting plates 6a on both sides, and the outer side of the mating cover 5b2 is movably fitted with the inner side of the corresponding limiting plate 6a, thereby achieving horizontal limiting of the mating cover 5b2, which can minimize shaking and enhance the stability of the shaft core 5b during axial movement.

[0045] Specifically, the number of the limiting plates 6a is one or more, preferably two or four, symmetrically arranged, and most preferably four. (Reference) Figure 2The upper housing 5a1 has an upper opening 10 for the upper part of the mating cover 5b2 to pass through and abut against. The upper outer part of the mating cover 5b2 has a blocking part 11 with a step so that the blocking part 11 abuts against the inner edge and lower edge of the upper opening 10, thereby limiting the upper end face of the shaft 5b1 to its highest position and preventing it from detaching from the fixed base 5a. The blocking part 11 also limits the highest position that the mating cover 5b2 can move upward.

[0046] In other embodiments, the limiting base 6 may also adopt other limiting forms.

[0047] Of course, the infrared switch button 5 also includes a keycap (not shown in the figure). The keycap is interference-fitted with the top of the switch body 5b1, so that when pressed, the user's finger will not directly contact the switch body 5b1, which improves the user's keying experience and also protects the switch body 5b1. The upper part of the switch body 5b1 has a cross-shaped horizontal section for inserting into the cross-shaped hole inside the keycap, thus allowing the keycap to be detachably connected to the switch body 5b1 and also securely connected to the switch body 5b1. The keycap is preferably a character backlit keycap or a transparent keycap.

[0048] refer to Figure 1 and Figure 3 The lower base 5a is provided with a flange 15 on its side. When the fixed base 5a is fixed, the flange 15 fits against the positioning plate 8, which makes the position of the fixed base 5a more stable and prevents it from moving up and down when the shaft core 5b or shaft body 5b1 is pressed.

[0049] Further, refer to Figure 3 The fixed base 5a has two elastic snap-fit ​​spring pieces 12 on its two opposite outer sides. The upper end of the snap-fit ​​spring piece 12 is provided with an outwardly extending stop plate 13. The lower ends of the snap-fit ​​spring piece 12 are provided with snap-fit ​​protrusions 14 on both sides. This structure allows the fixed base 5a to be directly fixed to the positioning plate 8 with positioning holes 9: when the fixed base 5a is pressed down, the snap-fit ​​protrusions 14 come into contact with the periphery of the positioning holes 9. When pressure is applied to the snap-fit ​​protrusions 14, the snap-fit ​​spring pieces 12 are also pressed and tightened inward to the fixed base 5a. When tightened to a certain extent, the positioning plate 8 is snapped between the stop plate and the snap-fit ​​protrusions 14, thus realizing the fixed connection between the fixed base 5a and the positioning plate 8.

[0050] The snap-fit ​​protrusion 14 is shaped like a triangle to facilitate the insertion and removal of the positioning plate 8 (see [reference]). Figure 1 When the positioning plate 8 is inserted and pulled out, the surfaces of the locking protrusion 14 that contact the positioning plate 8 are all inclined surfaces.

[0051] In some embodiments, the end of the core 5b is configured to be hollow or solid, having a columnar or conical profile, such as cylindrical, prismatic, or other conical.

[0052] refer to Figure 2 The infrared switch button 5 also includes a spring-loaded device 7, which is disposed on the fixed base 5a; wherein the spring-loaded device 7 can reset the shaft core 5b.

[0053] For example, the rebound device 7 is a spring sleeved on the outer periphery of the shaft core 5b. The two ends of the spring abut against or are connected to the inner wall of the fixed base 5a. When in use, the user applies pressure to the shaft core 5b, the shaft core 5b moves downward, the spring is compressed, and after the button is released, the spring releases the pressure and rebounds to its natural state, and the shaft core 5b returns to its initial position.

[0054] like Figures 6-10 As shown, in a second aspect, this application also provides a keyboard, including: a positioning plate 8, the positioning plate 8 being provided with positioning holes 9 for fixing a fixing base for an infrared switch button; and a circuit board 2, the circuit board 2 being disposed on at least one set of opposite sides inside the keyboard, comprising multiple sets of infrared emitting units and multiple sets of infrared receiving units, each set of infrared emitting units and infrared receiving units being arranged opposite to each other, forming an infrared light network composed of multiple intersecting infrared rays below the switch button operation area.

[0055] refer to Figure 11 The spindle core 5b extends downward into the infrared coverage area, and when the spindle core 5b extends downward into the infrared coverage area, at least one infrared ray is at least partially blocked, causing a change in the transmitted signal. In some embodiments, two or more infrared rays pass under each keyboard, and these infrared rays transmit signals simultaneously. When the spindle core 5b moves downward, its end blocks multiple infrared rays simultaneously.

[0056] For example, the keyboard also includes a circuit board 2 located below the positioning plate 8. The circuit board 2 is equipped with multiple infrared emitting units 3 and infrared receiving units 4 to form an infrared coverage area (infrared light grid area). The circuit board has two rows of infrared units, one row being the emitting units 3 and the other row being the receiving units 4. Multiple sets of infrared rays emitted by the multiple infrared emitting units 3 are received by the multiple infrared receiving units 4, forming multiple intersecting infrared light grids below the switch button operation area. When the switch core 5b extends downwards into the infrared coverage area, at least one infrared ray is partially or completely blocked (depending on the downward extension stroke of the switch core 5b), causing a change in the infrared transmission signal. Therefore, even if one or more infrared units (infrared emitting units 3 or infrared receiving units 4) are damaged, it does not affect the use of the keyboard. Specifically, pressing the switch core 5b by at least 0.01mm (preferably at least 0.001mm, more preferably at least 0.0001mm) triggers a change in the infrared transmission signal, improving sensitivity compared to traditional keyboards. For some gaming keyboards, sensitivity requirements are very high, and the keyboard of this application can meet these requirements.

[0057] When the user applies pressure to the infrared switch button 5, the shaft core 5b undergoes axial displacement, blocking the infrared light in the infrared coverage area at a specific position at its end. The infrared detection unit detects this change in infrared light at that specific position and generates an input signal. The position of the infrared switch button 5 can be preset with parameters or defined by the user. Thus, when a user wants to input a certain parameter or value, they can press the corresponding infrared switch button 5 to trigger the input behavior and output the corresponding key information to the system or control center. After releasing the infrared switch button 5, the shaft core 5b returns to its original position. The infrared detection unit detects a reduction in the area blocking the infrared light, which is considered a completion of the signal trigger. To repeat the input of the same information, the shaft core 5b can be pressed again without fully returning to its original position. During continuous pressing, the infrared detection unit can detect an increase in the area blocking the infrared light, thus sending the next round of input signals. This continues until the infrared switch button 5 is released, at which point the infrared light is no longer blocked, and no signal trigger is triggered after the obstruction is removed. The corresponding travel of the shaft core 5b during reset and pressing can be set. The change in infrared signal input is triggered when the shaft core 5b moves vertically by at least 0.0001mm. During the above-mentioned button pressing process, the shaft core 5b of the infrared switch button 5 does not make physical contact with any other components as it moves downward. Therefore, it will not experience contact wear after long-term use, and will not suffer from performance instability or accuracy degradation. This results in a long service life, thus overcoming the technical problems of existing input devices.

[0058] Specifically, please see Figure 7 and Figure 8The infrared emitting unit 3 and the infrared receiving unit 4 are disposed on the circuit board 2. The circuit board 2 has a hollow structure (frame structure). The infrared emitting unit 3 and the infrared receiving unit 4 are disposed on the periphery of the orthographic projection of all infrared switch buttons 5, or can be disposed in other shapes.

[0059] In one embodiment, both the infrared emitting unit 3 and the infrared receiving unit 4 are disposed on the long side of the circuit board 2, and not on the short side.

[0060] In another embodiment, the infrared emitting unit 3 array and the infrared receiving unit 4 array are on different circuit boards, with the two circuit boards perpendicular to the positioning plate and facing each other.

[0061] Specifically, the infrared emitting unit 3 and the infrared receiving unit 4 can correspond one-to-one, one-to-many, or many-to-one. That is, one infrared emitting unit 3 can correspond to one or more infrared receiving units 4, and one infrared receiving unit 4 can also correspond to one or more infrared emitting units 3.

[0062] In other embodiments, the circuit board 2 may also have a corresponding through hole 1, through which the shaft core 5b extends downward to the infrared coverage area.

[0063] In this context, both the infrared emitting unit 3 and the infrared receiving unit 4 can be general standard parts or components known to those skilled in the art. Their structure and principles are based on publicly available technologies, standard parts, or self-experiments, and will not be explained in detail here.

[0064] In the aforementioned implementation process, during key presses, the infrared switch button 5 does not collide with any components within it. Even after prolonged use, no contact wear occurs, preventing performance instability or accuracy degradation, resulting in a long service life. This overcomes the technical problems of existing input devices, providing users with a more precise and longer-lasting input device. Simultaneously, the keyboard employs infrared photoelectric technology. The infrared light grid has multiple trigger light paths on the bottom surface of each corresponding key, collectively determining the trigger action of the corresponding key. If one or more trigger light paths of a corresponding key are damaged, the trigger action can still be determined through other corresponding trigger light paths. Even when the trigger light path portion of the trigger assembly malfunctions, a trigger signal can still be generated at the corresponding key, ensuring normal keyboard operation. This reduces reliance on physical components in existing technologies, is more environmentally friendly, and lowers product manufacturing costs.

[0065] Meanwhile, the keyboard boasts a simple structure, adjustable precision, high reliability, and low maintenance costs. Utilizing infrared technology for a non-contact, high-precision design offers the following advantages: fast infrared detection and response speed; high scan and feedback rates for the switches, significantly reducing latency; precise setting of key press and release travel values ​​for triggering, enabling rapid triggering, emergency stopping, rapid secondary triggering, and continuous triggering; and precise setting of dead zone values ​​to prevent accidental touches. It can be customized to meet individual user habits and needs, overcoming the inherent limitations of physical structure in balancing performance and lifespan.

[0066] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. An infrared switch button, characterized in that, include: The device comprises an upper housing, a shaft, a spring-loaded device, and a fixed base, wherein the upper housing is provided with a light guide; the shaft is disposed in the fixed base and is capable of moving up and down relative to the fixed base; wherein, when the shaft moves downward through the bottom of the fixed base, it is used to block one or more infrared light paths.

2. The infrared switch button according to claim 1, characterized in that, The light guide is made of two symmetrically arranged light guides, each made of transparent material. Each light guide has an arc-shaped cross-section and a uniformly arranged scattering surface inside.

3. The infrared switch button according to claim 2, characterized in that, Of the two symmetrically arranged light guides, one corresponds to the upper light position and the other corresponds to the lower light position.

4. The infrared switch button according to claim 1, characterized in that, The light guide is integrally formed with the upper housing, or can be detachably installed on the upper housing; or the upper housing does not include the light guide, but has a light-transmitting hole at the corresponding position.

5. The infrared switch button according to claim 1, characterized in that, The lower end of the shaft core has a columnar or conical profile and is either hollow or solid.

6. The infrared switch button according to any one of claims 1-5, characterized in that, The spring-back device is disposed on the fixed base, and the spring-back device can reset the shaft core.

7. A keyboard, characterized in that, Including the infrared switch button according to any one of claims 1-6.

8. The keyboard according to claim 7, characterized in that, Also includes: A positioning plate, wherein the positioning plate is provided with positioning holes for fixing the base of the infrared switch button; The circuit board is disposed on at least one set of opposite sides inside the keyboard. It includes multiple sets of infrared emitting units and multiple sets of infrared receiving units. The infrared emitting units and the infrared receiving units are arranged opposite each other. Multiple sets of infrared rays emitted by the multiple sets of infrared emitting units are received by the multiple sets of infrared receiving units, forming multiple infrared light grids with intersecting trigger light paths below the switch key operation area. When the shaft moves downward through the bottom of the fixed base, it enters the infrared light grid and blocks one or more infrared rays, thereby affecting the signal value of the blocked infrared light path.

9. The keyboard according to claim 8, characterized in that, Each key in the keyboard is supported by one or more infrared rays.

10. The keyboard according to claim 9, characterized in that, The infrared lines below each button are multiple and do not overlap.

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