Infrared signal input device and non-contact infrared keyboard

Abstract

The utility model provides an infrared signal input device which comprises a circuit board provided with a through hole, a plurality of infrared transmitting units and infrared receiving units are arranged on the circuit board to form an infrared coverage area, and the infrared signal input device further comprises a key mechanism capable of movably penetrating through the through hole to block infrared rays in the infrared coverage area. The circuit board is further provided with an infrared detection unit used for detecting changes of infrared rays. According to the infrared signal input device, in the key pressing process, the key pressing mechanism does not make physical contact with any component, after long-term use, contact abrasion does not occur, the situation that performance is unstable or precision is reduced does not occur, and the service life is long.

Description

Technical Field

[0001] This utility model belongs to the field of input device technology, and relates to an infrared signal input device and a non-contact infrared keyboard including the 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 main structures rely on mechanical contacts, capacitive sensing, and magnetic sensing for triggering. Mechanical contacts experience wear and tear during vertical movement, while capacitive and magnetic sensing technologies are prone to performance instability or accuracy degradation after prolonged use. Therefore, it is necessary to provide a new type of input device with a long service life and high-precision, stable input to meet user needs. Utility Model Content

[0004] The purpose of this invention is to provide an infrared signal input device to solve the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, this utility model provides an infrared signal input device, including a circuit board with through holes. The circuit board is provided with a plurality of infrared emitting units and infrared receiving units arranged at intervals to form an infrared coverage area. It also includes a button mechanism, in which a movable body is provided that can be reset by a mechanical rebound device. When the movable body moves downward, it is used to block the emission of infrared rays. The circuit board is also provided with an infrared detection unit for detecting changes in infrared rays.

[0006] The present invention is further configured such that the button mechanism includes a fixed base, and the fixed base is provided with a limiting structure for limiting the movement direction of the movable body, and the movable body moves through the fixed base and the through hole.

[0007] The present invention is further configured such that the rebound device is a spring, a sheet, or a magnetic levitation structure.

[0008] The present invention is further configured such that the infrared signal input device includes a positioning plate, the positioning plate having a positioning hole, the fixing base being fixed to the positioning plate, and the side of the fixing base being in contact with the positioning hole.

[0009] The present invention is further configured such that the movable body includes a movable shaft and a mating cover disposed on the outer periphery of the movable shaft, the limiting structure consists of two limiting plates and a limiting cylinder, the two opposite outer sides of the mating cover are respectively movably fitted with the two limiting plates, and the inner wall of the limiting cylinder is movably fitted with the outer wall of the movable shaft.

[0010] The present invention is further configured such that the fixed base has a through-hole for the mating cover to pass through, the outer wall of the mating cover has a blocking part, and the projection of the blocking part on a plane perpendicular to the axial direction of the movable shaft is located outside the projection of the through-hole on a plane perpendicular to the axial direction of the movable shaft.

[0011] The present invention is further configured such that the fixed base includes an upper base and a lower base that are interlocked.

[0012] The present invention is further configured to include a protective cap, wherein the protective cap is interference-fitted with the movable shaft.

[0013] The present invention is further provided in that the two opposite outer sides of the fixed base are provided with elastic snap-fit ​​pieces, the end of the snap-fit ​​piece away from the fixed base is provided with a stop plate, and the end of the snap-fit ​​piece close to the fixed base is provided with a snap-fit ​​body.

[0014] This utility model also provides a non-contact infrared keyboard, including the infrared signal input device as described above.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The infrared signal input device provided by this utility model does not have physical contact with any components during button presses. Even after long-term use, it will not experience contact wear, performance instability, or accuracy degradation, resulting in a long service life. This overcomes the technical problems of existing input devices and provides users with input devices that offer higher accuracy and longer lifespan. Furthermore, the infrared signal input device utilizes infrared photoelectric technology, reducing reliance on physical components, making it more environmentally friendly, and lowering product manufacturing costs.

[0017] The infrared signal input device provided by this utility model has a simple structural unit, 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; the switch can achieve a high scan rate and high feedback rate, significantly reducing latency; 2. The trigger stroke, sensitivity value, and dead zone value of the button switch can be precisely set, overcoming the problem that physical structure cannot simultaneously balance performance and service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an infrared signal input device according to this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of an infrared signal input device according to this utility model. Figure 2 ;

[0020] Figure 3 This is an exploded schematic diagram of an infrared signal input device according to this utility model;

[0021] Figure 4 This is a schematic diagram of a key mechanism in an infrared signal input device according to this utility model.

[0022] Figure 5 This is a cross-sectional view of an embodiment of the button mechanism in an infrared signal input device according to this utility model;

[0023] Figure 6 This is a cross-sectional view of another embodiment of the button mechanism in an infrared signal input device according to this utility model;

[0024] Figure 7 This is a schematic diagram of the grating region after the axial displacement of the movable axis.

[0025] Figure 8 This is a schematic diagram of the grating region after the axial displacement of the movable axis.

[0026] Among them, 1. Through hole; 2. Circuit board; 3. Infrared emitting unit; 4. Infrared receiving unit; 5. Button mechanism; 5a. Fixed base; 5a1. Upper base; 5a2. Lower base; 5b. Movable body; 5b1. Movable shaft; 5b2. Matching cover; 6. Limiting structure; 6a. Limiting plate; 6b. Limiting cylinder; 7. Springback device; 8. Positioning plate; 9. Positioning hole; 10. Through opening; 11. Blocking part; 12. Snap-fit ​​spring piece; 13. Stop plate; 14. Snap-fit ​​body; 15. Protrusion; 16. Springback part; 17. Abutting part; 18. Elastic abutting body. Detailed Implementation

[0027] The infrared signal input device proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following description. It should be noted that the accompanying drawings are schematic and are only used to facilitate and clarify the explanation of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar components.

[0028] This utility model provides an infrared signal input device, see reference. Figures 1 to 7The device includes a circuit board 2 with a through hole 1. Multiple infrared emitting units 3 and infrared receiving units 4 are arranged on the circuit board 2 to form an infrared coverage area (grating area). 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. The infrared signal input device also includes a button mechanism 5 that can move through the through hole 1 to block infrared light in the infrared coverage area.

[0029] Specifically, the infrared signal input device can be a keyboard or other electronic products, such as a mouse.

[0030] Specifically, each infrared receiving unit 4 can receive infrared rays emitted by multiple infrared emitting units 3, thereby forming a grating area covering the entire circuit board 2.

[0031] Specifically, depending on the number of button mechanisms 5, one or more through holes 1 can be opened accordingly.

[0032] In one embodiment, the infrared signal input device can be used with a keyboard. (See reference) Figure 4 and Figure 5 The button mechanism 5 includes a fixed base 5a and a movable body 5b. The fixed base 5a is provided with a limiting structure 6 that limits the movement direction of the movable body 5b. The movable body 5b moves through the fixed base 5a and the through hole 1.

[0033] refer to Figure 5The movable body 5b includes a movable shaft 5b1 and a mating cover 5b2 disposed around the outer periphery of the movable shaft 5b1. It also includes a spring-loaded device 7 surrounding the outer periphery of the movable shaft 5b1. The upper and lower ends of the spring-loaded device 7 abut against the mating cover 5b2 and the fixed base 5a, respectively. In use, when the user applies pressure to the movable body 5b, the movable body 5b moves downwards, compressing the spring-loaded device 7. After releasing the button, the spring-loaded device 7 releases the pressure and springs back to its natural state, returning the movable body 5b to its initial position. When the user applies pressure to the button mechanism 5, the movable body 5b undergoes axial displacement. After passing through the through hole 1, it blocks the infrared light in the infrared coverage area at a specific position. The infrared detection unit captures the change in infrared light at this specific position and generates an input signal. The position of the button mechanism 5 can be preset with parameters or user-defined values. Thus, when a user wants to input a certain parameter or value, they can press the button mechanism 5 to trigger the input behavior and output the corresponding key information to the system or control center. When the button mechanism 5 is released, it returns to its original position and no longer blocks the infrared light in the infrared coverage area, forming an open circuit after the obstruction is removed. During the above button pressing process, the movable body 5b of the button mechanism 5 passes through the through hole 1 without physical contact with any other components. Even after long-term use, there will be no contact wear, no performance instability or accuracy degradation, and a long service life, thus overcoming the technical problems of existing input devices.

[0034] Specifically, the aforementioned rebound device 7 can be a spring, a spring sheet, or other structures that achieve the same function (such as magnetic levitation).

[0035] Among them, circuit board 2, infrared emitting unit 3 and infrared receiving unit 4 can all be general standard parts or components known to those skilled in the art. Their structure and principle are disclosed technologies, standard parts or obtained through self-experimentation in this field, and will not be explained in detail here.

[0036] In one embodiment, reference Figure 6 This infrared signal input device can also be used as a micro switch for a mouse. The difference in structure between this device and the infrared signal input device for a keyboard is that the rebound device 7 consists of two elastic, oppositely arranged springs. The top of each spring has a rebound portion 16, and the top opening of the two rebound portions 16 is flared. The movable body 5b has an abutment portion 17 that fits movably against the rebound portion 16. Thus, when the movable body 5b is no longer compressed, the two springs rebound towards the center, lifting the movable body 5b.

[0037] Specifically, the rebound device 7 also includes an elastic abutment 18 connected to the side of the spring sheet. The abutment abuts against the inner wall of the fixed base 5a, thereby further improving the rebound force and rebound performance of the rebound device 7.

[0038] In one embodiment, reference Figure 3 The infrared signal input device also includes a positioning plate 8 with positioning holes 9. The fixing base 5a is fixed to the positioning plate 8, and the side of the fixing base 5a contacts the positioning holes 9, thus fixing the fixing base 5a. In other embodiments, the fixing base 5a can be welded or glued to the circuit board.

[0039] Specifically, depending on the number of button mechanisms 5, one or more positioning holes 9 can be opened accordingly, and the position of the positioning hole 9 is opposite to the position of the through hole 1.

[0040] refer to Figure 5 The limiting structure 6 includes a limiting cylinder 6b, the inner wall of which is movably fitted with the outer wall of the movable shaft 5b1, thereby limiting the movable shaft 5b1 and enabling it to stably undergo axial displacement when compressed.

[0041] refer to Figure 5 The limiting structure 6 also includes two limiting plates 6a. The two opposite outer sides of the mating cover 5b2 are respectively in contact with the two limiting plates 6a, thus achieving a stable limiting of the mating cover 5b2 and enabling it to stably undergo axial displacement when under pressure.

[0042] In other embodiments, the limiting structure 6 may also adopt other limiting forms.

[0043] Specifically, the projection of the limiting plate 6a onto a plane perpendicular to the axial direction of the movable shaft 5b1 is U-shaped, which limits the four sides of the mating cover 5b2, thus further achieving stable limiting of the movable body 5b, allowing it to stably undergo axial displacement under pressure.

[0044] refer to Figure 5 The fixed base 5a has a through-hole 10 for the stepped portion of the mating cover 5b2 to pass through. The outer wall of the mating cover 5b2 has a blocking portion 11 perpendicular to the stepped portion. The projection of the blocking portion 11 on a plane perpendicular to the axial direction of the movable shaft 5b1 is outside the projection of the through-hole 10 on the same plane. This ensures that the movable shaft 5b1 can only move axially in the direction of the circuit board 2, preventing it from detaching from the fixed base 5a. The blocking portion 11 also limits the upward movement of the mating cover 5b2.

[0045] refer to Figure 5 The fixed base 5a includes an upper base 5a1 and a lower base 5a2 that are interlocked, which facilitates production.

[0046] refer to Figure 4The lower base 5a2 is provided with a protrusion 15 on its side. When the fixed base 5a is fixed, the protrusion 15 contacts the positioning plate 8, which makes the position of the fixed base 5a more stable and prevents it from shifting laterally when the movable body 5b or the movable shaft 5b1 is pressed.

[0047] Specifically, it also includes a protective cap (not shown in the figure), which is interference-fitted with the movable shaft 5b1. In this way, when pressing, the user's finger will not directly contact the movable shaft 5b1, which can improve the user's button experience and also protect the movable shaft 5b1.

[0048] refer to Figure 4 The movable shaft 5b1 has a cross-shaped connecting part projected onto a plane perpendicular to its axis (the top of the movable shaft 5b1 in the figure is the connecting part). The protective cap includes a connector that is interference-fitted with the connecting part, so that the protective cap can be detachably connected to the movable shaft 5b1 and can also be securely connected to the movable shaft 5b1.

[0049] refer to Figure 4 The fixed base 5a has 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 away from the fixed base 5a. A snap-fit ​​body 14 is provided at the end of the snap-fit ​​spring piece 12 close to the fixed base 5a. When the positioning plate 8 is snapped in, the fixed base 5a can be pressed down directly. The snap-fit ​​body 14 contacts the periphery of the positioning hole 9. Pressure is applied to the snap-fit ​​body 14, and the snap-fit ​​spring piece 12 is also pressed and tightened inward into the fixed base 5a. When it is tightened to a certain extent, the positioning plate 8 is snapped between the stop plate and the snap-fit ​​body 14, thus realizing the fixed connection between the fixed base 5a and the positioning plate 8.

[0050] The shape of the insert 14 is designed as a triangle to facilitate the insertion and removal of the positioning plate 8 (see [reference]). Figure 4 When the positioning plate 8 is inserted and pulled out, the surfaces of the inserting body 14 that come into contact with the positioning hole 9 are all inclined surfaces.

[0051] This utility model embodiment also provides a non-contact infrared keyboard, including the infrared signal input device as described above. Its working principle is the same as that of the infrared triggering device described above. Similarly, during the key press process, the key mechanism 5 does not make physical contact with any component. After long-term use, there will be no contact wear, no performance instability or accuracy reduction, and a long service life. It provides users with a good user experience, meets the needs of ever-increasing system applications and competitive players, adapts to the different needs of different groups for personalized keyboard precision, and overcomes the problem that the physical structure cannot balance working performance and service life.

[0052] Specifically, it also includes a keyboard housing (not shown in the figure) and sound-absorbing cotton, etc. The circuit board 2 and the positioning plate 8 are fixed inside the keyboard housing. Multiple through holes 1 are opened according to the keyboard layout of a conventional keyboard. The key mechanism 5 is set according to the keyboard layout of the keyboard and corresponds to the preset key position information of each key.

[0053] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model 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. An infrared signal input device, characterized in that, The device includes a circuit board (2) with a through hole (1), on which multiple infrared emitting units (3) and infrared receiving units (4) are arranged at intervals to form an infrared coverage area. It also includes a button mechanism (5), in which a movable body is provided that can be reset by a mechanical rebound device. When the movable body moves downward, it is used to block the emission of infrared rays.

2. The infrared signal input device according to claim 1, characterized in that, The button mechanism (5) further includes a fixed base (5a), and a limiting structure (6) is provided in the fixed base (5a) to limit the movement direction of the movable body (5b). The movable body (5b) moves through the fixed base (5a) and the through hole (1).

3. The infrared signal input device according to claim 1 or 2, characterized in that, The rebound device (7) is a spring, a spring sheet, or a magnetic levitation structure.

4. The infrared signal input device according to claim 2, characterized in that, It also includes a positioning plate (8), on which a positioning hole (9) is provided, and the fixing base (5a) is fixed on the positioning plate (8), with the side of the fixing base (5a) in contact with the positioning hole (9).

5. The infrared signal input device according to claim 2, characterized in that, The movable body (5b) includes a movable shaft (5b1) and a mating cover (5b2) disposed on the outer periphery of the movable shaft (5b1). The limiting structure (6) includes two limiting plates (6a) and a limiting cylinder (6b). The two opposite outer sides of the mating cover (5b2) are respectively movably fitted with the two limiting plates (6a), and the inner wall of the limiting cylinder (6b) is movably fitted with the outer wall of the movable shaft (5b1).

6. The infrared signal input device according to claim 5, characterized in that, The fixed base (5a) has a through-hole (10) for the mating cover (5b2) to pass through. The outer wall of the mating cover (5b2) has a blocking part (11). The projection of the blocking part (11) on a plane perpendicular to the axial direction of the movable shaft (5b1) is outside the projection of the through-hole (10) on a plane perpendicular to the axial direction of the movable shaft (5b1).

7. The infrared signal input device according to claim 2, characterized in that, The fixed base (5a) includes an upper base (5a1) and a lower base (5a2) that are interlocked.

8. The infrared signal input device according to claim 5, characterized in that, It also includes a protective cap, which is interference-fitted with the movable shaft (5b1).

9. The infrared signal input device according to claim 4, 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 ​​body (14) is provided at the end of the snap-fit ​​spring piece (12) close to the fixed base (5a).

10. A non-contact infrared keyboard, characterized in that, Includes the infrared signal input device according to any one of claims 1-9.

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