Key assembly and infrared signal input apparatus

Abstract

Provided in the present application are a key assembly and an infrared signal input apparatus including the assembly. The key assembly comprises a key shaft that movably extends downward from its tail end to block infrared rays. When the key shaft movably extends downward to block the infrared rays, an infrared transmission signal changes. In the key assembly and the infrared signal input apparatus including the assembly, which are provided in the present application, the key assembly does not collide or come into contact with any component during key pressing; therefore, after long-term use, no contact wear occurs, no performance instability or accuracy degradation occurs, and a long service life is achieved.

Description

Button assembly and infrared signal input device Technical Field

[0001] This application belongs to the field of input device technology, and relates to a key assembly and an infrared signal input device. 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] Currently, most existing buttons are designed using physical structures or technologies such as magnetism and optics. Their primary triggering methods are mechanical contacts, capacitive sensing, and magnetic sensing. Mechanical contacts experience wear during vertical movement, while capacitive and magnetic sensing are prone to performance instability or accuracy degradation after prolonged use. Furthermore, the long vertical travel of the spindle during continuous triggering limits the speed of continuous actuation. Therefore, it is necessary to provide a new type of input device that offers a long service life, high-precision and stable input, and fast triggering speed to meet user needs. Summary of the Invention

[0004] The purpose of this application is to provide a button assembly and an infrared signal input device including the assembly, in order to solve the above-mentioned technical problems.

[0005] To address the aforementioned technical problems, this application provides a key assembly for infrared signal input, including a key shaft whose end extends downward to block infrared light. When the key shaft extends downward, it blocks infrared light, causing a change in the infrared transmission signal.

[0006] This application is further configured to include a spring-back device that enables the key shaft to be reset.

[0007] This application further includes a fixed base, wherein a limiting base is provided inside the fixed base to limit the movement direction of the button shaft, and the button shaft moves through the fixed base.

[0008] This application further specifies that the button shaft includes a shaft body, the limiting base includes a limiting cylinder, and the inner wall of the limiting cylinder is movably fitted with the outer wall of the shaft body.

[0009] This application further specifies that the button shaft includes a mating cover disposed on the outer periphery of the shaft body, and the limiting base includes one or more limiting plates, with the two opposite outer sides of the mating cover respectively movably fitted to the limiting plates.

[0010] The present application is further configured such that the fixed base has an upper opening for the mating cover to pass through and abut against, the outer wall of the mating cover has a blocking part, and the blocking part is provided with a step so that the blocking part abuts against the inner edge and the lower edge of the upper opening.

[0011] This application further specifies that the rebound device is a spring sleeved on the outer periphery of the key shaft, and the two ends of the spring abut against or are connected to the inner wall of the fixed base, respectively.

[0012] This application further specifies that the rebound device consists of two elastically arranged opposite spring pieces, each spring piece having a rebound portion at its top, the top openings of the two rebound portions being trumpet-shaped, and the key shaft having a wedge-shaped abutment portion that movably engages with the rebound portion.

[0013] This application further provides that each of the rebound portions has a V-shaped elastic abutment at its top, and the elastic abutment abuts against the inner wall of the fixed base.

[0014] This application further specifies that the rebound device is a magnetic levitation structure.

[0015] This application is further configured such that the lower part of the wedge-shaped abutment is separated from the bottom of the aforementioned V-shaped fold, and the lowest end of the wedge-shaped abutment is used to block the transmission of infrared rays.

[0016] This application further specifies that the fixed base includes an upper base and a lower base that are interlocked.

[0017] This application is further configured to include a keycap, which is interference-fitted with the top of the switch.

[0018] This application further provides that the two opposite outer sides of the fixed base are provided with elastic snap-fit ​​springs, the end of the snap-fit ​​spring away from the fixed base is provided with a stop plate, and the end of the snap-fit ​​spring close to the fixed base is provided with a snap-fit ​​protrusion.

[0019] This application is further configured such that when the button shaft extends downward by at least 0.01 mm, the infrared transmission signal changes.

[0020] Preferably, the infrared transmission signal changes when the button shaft extends downward by at least 0.001 mm.

[0021] More preferably, the infrared transmission signal changes when the button shaft extends downward by at least 0.0001 mm.

[0022] This application also provides an infrared signal input device, including the above-mentioned button assembly, and a positioning plate with a positioning hole. The button assembly is fixed in the positioning hole. The device also includes a plurality of infrared emitting units and infrared receiving units arranged at intervals below the positioning plate to form an infrared coverage area. The button shaft can extend downward into the infrared coverage area, and when the button shaft extends downward into the infrared coverage area, at least one infrared ray is at least partially blocked, causing a change in the infrared transmission signal.

[0023] This application further specifies that the infrared emitting unit and the infrared receiving unit are disposed on a PCB board or circuit board, the PCB board or circuit board has a hollow structure, and the infrared emitting unit and the infrared receiving unit are disposed on the periphery of the orthographic projection of all button components.

[0024] This application further specifies that the infrared emitting unit and the infrared receiving unit are disposed on the long side of the PCB board or circuit board, and not disposed on the short side.

[0025] This application further configures the button assembly to have preset parameters at its location. When the button shaft is pressed, an input behavior is triggered, and the information of the key position is output to the control center. After the pressure is removed, the button shaft moves upward to reset, and the infrared blocking area is reduced, which is considered to complete a signal trigger.

[0026] This application is further configured such that when the button shaft is pressed continuously, the button shaft does not need to be fully reset to its original position before the next signal input can begin.

[0027] This application provides a non-contact infrared keyboard, including the key assembly as described above or the infrared signal input device as described above, wherein the key assembly does not contain an electrical connection structure.

[0028] Compared with the prior art, the beneficial effects of this application are as follows:

[0029] The button assembly and infrared input device including the button assembly provided in this application do not have any collision contact with any components within the button assembly during button pressing (such as the collision contact between the button shaft and two metal pieces during the up-and-down movement of the mechanical shaft in the prior art). Even after long-term use, no contact wear will occur, and there will be no performance instability or decrease in accuracy. This results in a long service life, overcoming the technical problems of existing input devices and providing users with input devices that offer higher accuracy and longer lifespan. Furthermore, the infrared signal input device uses infrared photoelectric technology, reducing the reliance on physical components in existing technologies, making it more environmentally friendly, and lowering product manufacturing costs.

[0030] The button assembly and infrared input device including the button assembly provided in this application have a simple structure, adjustable precision, high reliability, and low maintenance cost. This application utilizes infrared technology to achieve a non-contact, high-precision design, offering the following advantages: 1. Fast infrared detection and response speed, enabling high scan and feedback rates, significantly reducing latency; 2. Precise setting of the button switch's trigger travel, sensitivity, and dead zone, allowing for adjustments based on user preferences and meeting customer needs, overcoming the problem of physical structure not simultaneously balancing performance and lifespan. Attached Figure Description

[0031] Figure 1 is a structural schematic diagram of an embodiment of a button component according to this application;

[0032] Figure 2 is a cross-sectional view of an embodiment of a button assembly according to this application;

[0033] Figure 3 is a cross-sectional view of another embodiment of a button component according to this application;

[0034] Figure 4 is an exploded view of an embodiment of a button component according to this application;

[0035] Figure 5 is a perspective view of an embodiment of a button component according to this application;

[0036] Figure 6 is a perspective view of an embodiment of a button component of this application when it is pressed;

[0037] Figure 7 is a schematic diagram of an embodiment of an infrared signal input device according to this application;

[0038] Figure 8 is a schematic diagram of an embodiment of an infrared signal input device according to this application.

[0039] Figure 9 is an exploded view of an embodiment of an infrared signal input device according to this application;

[0040] Figure 10 is a structural schematic diagram of another embodiment (including a through hole) of an infrared signal input device according to this application;

[0041] Figure 11 is an exploded view of another embodiment (including a through hole) of an infrared signal input device according to this application;

[0042] Figure 12 is a bottom-view perspective view of an infrared signal input device according to this application;

[0043] Figure 13 is a bottom view of the grating area after the axial displacement of the button shaft;

[0044] Figure 14 is a bottom view of another embodiment of an infrared signal input device according to this application;

[0045] Figure 15 is a front view of another embodiment of an infrared signal input device according to this application;

[0046] Figure 16 is a perspective view of another embodiment of an infrared signal input device according to this application.

[0047] Among them, 1. Through hole; 2. PCB board; 3. Infrared emitting unit; 4. Infrared receiving unit; 5. Button assembly; 5a. Fixed base; 5a1. Upper base; 5a2. Lower base; 5b. Button shaft; 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. Abutting part; 18. Elastic abutting body. Detailed Implementation

[0048] The infrared signal input device proposed in this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this application will become clearer from the following description. It should be noted that the drawings are all schematic and are only used to facilitate and clarify the illustration of the embodiments of this application. The same or similar reference numerals in the drawings represent the same or similar components.

[0049] This application provides a button assembly 5 for infrared signal input. Referring to Figures 1 to 3, the button assembly 5 includes a button shaft 5b whose end extends downward to block infrared rays. Infrared rays are arranged in the horizontal plane below the button assembly 5. When the button shaft 5b extends downward, its end blocks the infrared rays. At this time, the corresponding infrared transmission signal is partially or completely blocked, triggering a command.

[0050] Referring to Figure 5, this keyboard configuration only requires infrared emitting units 3 and infrared receiving units 4 to be located around the perimeter below the key assembly 5. No electrical connections are needed around the key assembly; simply fixing it to the keyboard is sufficient to achieve all functions. The advantages are structural partitioning, a purely mechanical key assembly without the influence of electrical connections, resulting in more stable performance. Furthermore, the absence of electrical connections extends the keyboard's lifespan.

[0051] Referring to Figure 2, the button assembly 5 also includes a spring-loaded device 7, which can reset the button shaft 5b.

[0052] Referring to Figure 2, the button shaft 5b includes a shaft body 5b1, and the button assembly 5 also includes a fixed base 5a. The fixed base 5a is provided with a limiting base 6 to limit the movement of the button shaft 5b. The limiting base 6 includes a limiting cylinder 6b, and 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.

[0053] Referring to Figure 2, the button shaft 5b further 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 button shaft 5b during axial movement.

[0054] Specifically, the number of limiting plates 6a is one or more, preferably two or four, symmetrically arranged, and most preferably four. Referring to Figure 2, the fixed base 5a 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, which has a step so that the blocking part 11 abuts against the inner edge and lower edge of the upper opening 10. This allows the upper end face of the shaft 5b1 to be fully limited, preventing it from detaching from the fixed base 5a. The blocking part 11 also limits the highest position of the mating cover 5b2's upward movement.

[0055] In other embodiments, the limiting base 6 may also adopt other limiting forms.

[0056] Referring to Figure 2, the rebound device 7 is a spring sleeved on the outer periphery of the button shaft 5b. Both ends of the spring abut against or connect to the inner wall of the fixed base 5a. In use, when the user applies pressure to the button shaft 5b, the button shaft 5b moves downwards, compressing the spring. After releasing the button, the spring releases the pressure and rebounds to its natural state, and the button shaft 5b returns to its initial position. The fixed base 5a includes an upper base 5a1 and a lower base 5a2 that interlock, facilitating production.

[0057] Figure 3 shows another embodiment of the rebound device 7, which consists of two elastically arranged opposing springs. Each spring has a rebound portion 16 at its top, with the top opening of each spring portion 16 being trumpet-shaped. Each spring portion 16 has a V-shaped elastic abutment 18 at its top, which abuts against the inner wall of the fixed base 5a. The spring portion has an obtuse-angle bend in the middle. The button shaft 5b has a wedge-shaped abutment 17 that movably engages with the rebound portion 16, and the lower part of the wedge-shaped abutment 17 is separated from the bottom of the aforementioned V-shaped bend. The lowermost end of the wedge-shaped abutment 17 blocks the transmission of infrared rays. Thus, when the button shaft 5b moves downwards, pressure is applied to the rebound portion 16. After the button shaft 5b is no longer under pressure, the two springs rebound towards the center, lifting the button shaft 5b. The elastic abutment 18 further enhances the rebound force and rebound performance of the rebound device 7. The obtuse angle bend in the middle of the spring reduces the contact area between the spring and the key shaft 5b, thereby reducing friction.

[0058] In other embodiments, the rebound device 7 may also be a magnetic levitation structure or other structures that achieve the same function.

[0059] Specifically, it also includes a keycap (not shown in the figure), which is interference-fitted with the top of the switch 5b1. This prevents the user's fingers from directly contacting the switch 5b1 when pressed, improving the user's typing experience and protecting the switch 5b1. The upper part of the switch 5b has a cross-shaped horizontal section for insertion into the cross-shaped hole inside the keycap, allowing for a detachable yet secure connection between the keycap and the switch 5b1.

[0060] Referring to Figure 1, the lower base 5a2 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 button shaft 5b or the shaft body 5b1 is pressed.

[0061] In the embodiment shown in Figure 1, elastic snap-fit ​​spring pieces 12 are provided on the two opposite outer sides of the fixed base 5a. A stop plate 13 extending outward is provided at the upper end of the snap-fit ​​spring piece 12, and snap-fit ​​protrusions 14 are provided on both sides of the lower end of the snap-fit ​​spring piece 12. 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 13 and the snap-fit ​​protrusions 14, thus realizing the fixed connection between the fixed base 5a and the positioning plate 8.

[0062] The snap-fit ​​protrusion 14 is shaped like a triangle to facilitate the snap-fit ​​and pull-out of the positioning plate 8 (see Figure 1). When the positioning plate 8 is snapped in and pulled out, the surfaces of the snap-fit ​​protrusion 14 that come into contact with the positioning plate 8 are all inclined surfaces.

[0063] Figure 4 shows an exploded view of the button assembly 5. Figure 5 shows the state of the button assembly 5 when it is not pressed; Figure 6 shows the state of the button assembly 5 when it is pressed to the lowest point (when the travel is fully to the bottom), in which the button shaft 5b extends downward to the lowest point.

[0064] This application also provides an infrared signal input device, referring to Figures 7 to 13, including the aforementioned key assembly 5, and a positioning plate 8 with positioning holes 9. The key assembly 5 is fixed in the positioning holes 9. The device also includes a PCB board located below the positioning plate 8. The PCB board has multiple infrared emitting units 3 and infrared receiving units 4 arranged to form an infrared coverage area (grating area, see Figure 13). The infrared emitting units 3 and infrared receiving units 4 are arranged alternately and intermittently. For example, one or two infrared receiving units 4 are arranged between two adjacent infrared emitting units 3. The infrared emitting units 3 and infrared receiving units 4 constitute an infrared detection unit. When the key shaft 5b extends downward into the infrared coverage area, at least one infrared ray is partially or completely blocked (depending on the downward extension of the key shaft), causing a change in the infrared transmission signal. Therefore, even if one or more infrared units (infrared emitting unit 3 or infrared receiving unit 4) are damaged, the use of the keyboard is not affected. Specifically, pressing the key axis 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, thus improving sensitivity compared to traditional keyboards. For some gaming keyboards, sensitivity requirements are extremely high, and the keyboard of this application can meet those requirements.

[0065] When a user applies pressure to button assembly 5, button shaft 5b undergoes axial displacement, blocking infrared light at a specific position within the infrared coverage area. The infrared detection unit detects this change in infrared light at that specific position and generates an input signal. The position of button assembly 5 can be preset with parameters or user-defined values. Thus, when a user wants to input a specific parameter or value, they can press button assembly 5 to trigger the input action and output the corresponding key information to the system or control center. After releasing button assembly 5, button shaft 5b returns to its original position. The infrared detection unit detects a reduction in the area blocking infrared light, indicating the signal triggering is complete. To repeatedly input the same information, button shaft 5b can be continuously pressed without fully returning to its original position. During continuous pressing, the infrared detection unit detects an increase in the area blocking infrared light, triggering the next input signal. This continues until button assembly 5 is released, at which point infrared light is no longer blocked, and no signal trigger occurs after the obstruction is removed. The corresponding travel distance of button shaft 5b during reset and pressing can be set. A vertical movement of at least 0.0001mm on the button shaft triggers a change in infrared signal input. During the aforementioned key press process, the key shaft 5b of the key assembly 5 does not come into physical contact with any other component as it moves downward. After long-term use, it will not experience contact wear, and there will be no performance instability or decrease in accuracy. It has a long service life, thus overcoming the technical problems of existing input devices.

[0066] Specifically, as shown in Figures 8 and 9, the infrared emitting unit 3 and the infrared receiving unit 4 are disposed on the PCB board 2. The PCB 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 the button components 5, or they can be disposed in other shapes.

[0067] In one embodiment, as shown in Figures 14 to 16, both the infrared emitting unit 3 and the infrared receiving unit 4 are disposed on the long side of the PCB board 2, and are not disposed on the short side.

[0068] 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 emitting unit 3 can correspond to one or more receiving units 4.

[0069] In other embodiments, the PCB board 2 may also have a corresponding through hole 1, and the button shaft 5b extends downward from the through hole 1 to the infrared coverage area, as shown in Figure 12.

[0070] 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.

[0071] Specifically, the infrared signal input device can be a keyboard or other electronic products, such as a mouse (micro switch).

[0072] Specifically, it also includes a keyboard housing (not shown in the figure) and sound-absorbing cotton, etc. The PCB board 2 and the positioning plate 8 are fixed inside the keyboard housing. The key assembly 5 is arranged according to the keyboard layout and corresponds to the preset key position information of each key.

[0073] In the above embodiments of this application, the PCB board can be replaced with a circuit board.

[0074] The above description is merely a description of preferred embodiments of this application and is not intended to limit the scope of this application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A button assembly for infrared signal input, characterized in that, Includes a button shaft (5b) that extends downwards to block infrared light. When the button shaft (5b) extends downwards, it can block infrared light, causing the infrared transmission signal to change.

2. The button assembly according to claim 1, characterized in that, It also includes a spring-back device (7) that can reset the key shaft (5b).

3. The button assembly according to claim 2, characterized in that, It also includes a fixed base (5a), in which a limiting base (6) is provided to limit the movement direction of the button shaft (5b), and the button shaft (5b) moves through the fixed base (5a).

4. The button assembly according to claim 3, characterized in that, The button shaft (5b) includes a shaft body (5b1), and the limiting base (6) includes a limiting cylinder (6b). The inner wall of the limiting cylinder (6b) is movably fitted with the outer wall of the shaft body (5b1).

5. The button assembly according to claim 4, characterized in that, The button shaft (5b) also includes a mating cover (5b2) disposed on the outer periphery of the shaft body (5b1), and the limiting base (6) also includes one or more limiting plates (6a), with the two opposite outer sides of the mating cover (5b2) respectively movably fitting against the limiting plate (6a).

6. The button assembly according to claim 5, characterized in that, The fixed base (5a) has an upper opening (10) through which the mating cover (5b2) passes and abuts. The outer wall of the mating cover (5b2) has a blocking part (11). The blocking part (11) is provided with a step so that the blocking part (11) abuts against the inner edge and lower edge of the upper opening (10).

7. The button assembly according to claim 3, characterized in that, The rebound device (7) is a spring sleeved on the outer periphery of the key shaft (5b), and the two ends of the spring abut against or are connected to the inner wall of the fixed base (5a).

8. The button assembly according to claim 3, characterized in that, The rebound device (7) consists of two elastically arranged opposite springs, with a rebound portion (16) at the top of each spring. The top openings of the two rebound portions (16) are funnel-shaped. The key shaft (5b) has a wedge-shaped abutment portion (17) that movably fits with the rebound portion (16). Alternatively, the rebound device (7) is a magnetic levitation structure.

9. The button assembly according to claim 8, characterized in that, Each of the spring sections (16) has a V-shaped elastic abutment (18) at its top, which abuts against the inner wall of the fixed base (5a).

10. The button assembly according to claim 8, characterized in that, The lower part of the wedge-shaped abutment (17) is separated from the bottom of the above-mentioned V-shaped fold, and the lowermost end of the wedge-shaped abutment (17) is used to block the transmission of infrared rays.

11. The button assembly according to claim 3, characterized in that, The fixed base (5a) includes an upper base (5a1) and a lower base (5a2) that are interlocked.

12. The button assembly according to claim 4, characterized in that, It also includes keycaps that are interference-fitted with the top of the switch (5b1).

13. The button assembly according to claim 3, characterized in that, The fixed base (5a) is provided with two elastic snap-fit ​​spring pieces (12) on its two opposite outer sides. A stop plate (13) is provided at the end of the snap-fit ​​spring piece (12) away from the fixed base (5a), and a snap-fit ​​protrusion (14) is provided at the end of the snap-fit ​​spring piece (12) close to the fixed base (5a).

14. The button assembly according to any one of claims 1-13, characterized in that, When the key shaft (5b) extends downward by at least 0.01 mm, the infrared transmission signal changes accordingly.

15. The button assembly according to any one of claims 1-13, characterized in that, When the key shaft (5b) extends downward by at least 0.001 mm, the infrared transmission signal changes accordingly.

16. The button assembly according to any one of claims 1-13, characterized in that, When the key shaft (5b) extends downward by at least 0.0001mm, the infrared transmission signal changes accordingly.

17. An infrared signal input device, characterized in that, The button assembly (5) according to any one of claims 1-16 further includes a positioning plate (8) with a positioning hole (9), the button assembly (5) is fixed in the positioning hole (9), and also includes a plurality of spaced infrared emitting units (3) and infrared receiving units (4) located below the positioning plate (8) to form an infrared coverage area. The button shaft (5b) can extend downward into the infrared coverage area, and when the button shaft (5b) extends downward into the infrared coverage area, at least one infrared ray is at least partially blocked, causing a change in the infrared transmission signal.

18. The infrared signal input device according to claim 17, characterized in that, The infrared emitting unit (3) and the infrared receiving unit (4) are disposed on the PCB board or circuit board (2). The PCB board or circuit board (2) has a hollow structure. The infrared emitting unit (3) and the infrared receiving unit (4) are disposed on the periphery of the orthographic projection of all the button components (5).

19. The infrared signal input device according to claim 18, characterized in that, The infrared emitting unit (3) and the infrared receiving unit (4) are located on the long side of the PCB board or circuit board, and are not located on the short side.

20. The infrared signal input device according to claim 17, characterized in that, The button assembly (5) is positioned with preset parameters. When the button shaft (5b) is pressed, it triggers an input behavior and outputs the information of the key position to the control center. After the pressure is removed, the button shaft (5b) moves upward to reset, and the infrared blocking area is reduced, which is considered to complete a signal trigger.

21. The infrared signal input device according to claim 17, characterized in that, When the button shaft (5b) is pressed continuously, the button shaft (5b) does not need to be fully reset to its original position before the next signal input can begin.

22. A non-contact infrared keyboard, characterized in that, The device includes a button assembly according to any one of claims 1-16 or an infrared signal input device according to any one of claims 17-21, wherein the button assembly does not contain an electrical connection structure.

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