Digital infrared photoelectric sensor shaft body switch and keyboard

Abstract

The utility model discloses a digital infrared photoelectric sensor shaft body switch and a keyboard, the digital photoelectric sensor shaft body switch is used for triggering a digital photoelectric sensor to generate and output a digital signal, the digital photoelectric sensor shaft body switch comprises a shaft base, a shaft cover is connected on the shaft base, a shaft handle capable of moving up and down is arranged in the shaft base and the shaft cover, and the shaft handle is connected with the shaft base. A reset spring is arranged between the bottom of the shaft handle and the shaft base, and is characterized in that a shaft handle reflecting part is arranged on one side wall of the shaft handle, and a reflecting surface is arranged at the bottom end of the shaft handle reflecting part. The digital infrared photoelectric sensor shaft body switch is simple in structure, low in cost, capable of effectively reducing the swing amplitude in the motion stroke of the shaft handle, high in triggering accuracy and reliability, relatively small in frictional resistance, good in pressing hand feeling and ultra-low in time delay.

Description

Technical Field

[0001] The utility model relates to the technical field of key switches, and particularly relates to a digital infrared photoelectric sensor shaft body switch and a keyboard. Background Art

[0002] At present, ordinary optical key switches on the market, etc., all adopt the infrared emission and photoresistor pair tube method or the Darlington triode method to achieve. Both implementation methods are analog signal outputs, and the analog signal needs to be converted into a digital signal through corresponding electronic components and circuits. Signal distortion and delay will occur during the signal conversion and transmission process. Therefore, ordinary optical key switches on the market are prone to electrical function problems such as contact breakage, false touch, and delayed triggering. Especially when using ordinary magnetic key switches in competitive games with high requirements for transmission speed, the above electrical function problems are extremely obvious.

[0003] For the above two ordinary optical key switches on the market, etc., the key pressing travel needs to be 1.5 - 2.0 mm, and the time from the initial state to the triggered state of the key switch is long. It is impossible to achieve a key travel trigger sensitivity of 0.1 mm. Therefore, the delay is long, and it cannot meet the use requirements of ultra-high sensitivity and ultra-low delay in professional competitive games.

[0004] For the above two ordinary optical key switches on the market, etc., the guiding cooperation between the key pressing handle and the key cap in the movement travel is mostly a short-travel cooperation. When the pressing handle moves in the key cap, the shaking amplitude is large and the frictional resistance is large, resulting in poor feel when pressing the key switch.

[0005] For the above two ordinary optical key switches and keyboards with optical key switches on the market, etc., the RGB color-changing LED used for the keyboard lighting effect needs to be specifically driven and controlled by a corresponding chip. The corresponding PCB circuit wiring is more, and the number of lamp control chips and electronic components is large, resulting in a higher cost.

[0006] Therefore, the existing ordinary optical key switches on the market and the key switches with optical key switches need to be further improved. Content of the Utility Model

[0007] The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a digital infrared photoelectric magnetic sensor shaft body switch with a simple structure, low cost, which can effectively reduce the swaying amplitude during the movement of the shaft handle, has high triggering accuracy and reliability, relatively small frictional resistance, good pressing feel, and ultra-low delay.

[0008] Another purpose of the utility model is to provide a key switch keyboard including the above digital infrared photoelectric sensor shaft body switch.

[0009] Regarding the digital infrared optoelectromagnetic sensor shaft switch, to achieve the above object, the present utility model adopts the following solution: A digital infrared optoelectronic sensor shaft switch for triggering a digital optoelectronic sensor to generate an output digital signal, comprising a shaft base, a shaft cover connected to the shaft base, a shaft handle capable of moving up and down in the shaft base and the shaft cover, and a return spring disposed between the bottom of the shaft handle and the shaft base. It is characterized in that: a shaft handle reflection part is provided on one side wall of the shaft handle, and a reflection surface is provided at the bottom end of the shaft handle reflection part.

[0010] The edge part of the shaft cover shaft hole that mates with the shaft handle is configured with an arc-shaped long guiding rib position structure for enabling the stable up and down movement of the shaft handle; when pressing the shaft handle, the shaft handle moves downward in a long stroke along the arc-shaped long guiding rib position structure provided at the edge of the shaft cover shaft hole, and at the same time, the reflection surface at the bottom end of the shaft handle reflection part moves downward to change the infrared light intensity change detected due to the height difference between the digital optoelectronic sensor and the reflection surface. The digital optoelectronic sensor quantifies the infrared light intensity change induced voltage into a digital sample value to generate an output high and low level digital signal; the shaft base is configured with an avoidance groove that mates with the shaft handle reflection part, and the shaft handle reflection part can avoid movement interference with the shaft base during the stroke movement through the avoidance groove.

[0011] As another improvement of the digital infrared optoelectronic sensor shaft switch of the present utility model, the reflection surface can be a mirror surface on the surface of the plastic body or a mirror surface of the electroplated coating on the plastic body.

[0012] As another improvement of the digital infrared optoelectronic sensor shaft switch of the present utility model, an avoidance groove is opened at a position corresponding to the shaft handle reflection part on the shaft base.

[0013] As another improvement of the digital infrared optoelectronic sensor shaft switch of the present utility model, a fixing buckle position is provided on the shaft base, and a buckle position fixing surface is provided on the shaft cover. The assembly and fixed connection of the shaft base and the shaft cover are realized through the cooperation of the fixing buckle position and the buckle position fixing surface.

[0014] As another improvement of the digital infrared optoelectronic sensor shaft switch of the present utility model, a guiding tube is provided in the shaft base, the return spring is sleeved on the outer wall of the guiding tube, a guiding column is provided in the lower end of the shaft handle, and the guiding column is movably inserted into the guiding tube.

[0015] As another improvement of the digital infrared optoelectronic sensor shaft switch of the present utility model, a connecting column is provided in the middle of the lower end surface of the shaft base, and a plurality of supporting convex columns are provided on the outer periphery of the shaft base.

[0016] The digital infrared optoelectronic sensor shaft key switch of the utility model is characterized in that: it includes a PCB board, and at least one of the above-mentioned digital infrared optoelectronic sensor shaft switches is arranged on the PCB board. A digital optoelectronic sensor corresponding to the digital infrared optoelectronic sensor shaft switch one by one is arranged on the PCB board. The emission port and the reception detection port of the digital optoelectronic sensor and the reflecting surface form a reflection optical path system.

[0017] As another improvement of the digital infrared optoelectronic sensor shaft key switch of the utility model, the digital optoelectronic sensor simultaneously has the functions of infrared light emission and infrared light reflection reception detection, can linearly detect the change of the infrared reflection light intensity caused by the height difference of the reflecting surface, and the digital optoelectronic sensor quantizes the infrared light intensity change induced voltage into a digital sample value to generate an output high and low level digital signal.

[0018] As another improvement of the digital infrared optoelectronic sensor shaft key switch of the utility model, the digital optoelectronic sensor can linearly detect the change of the infrared light intensity induced voltage during the 0.1mm stroke of the switch button, can achieve a sensitivity of 0.1mm trigger (key travel 4.0mm), and supports adjustable functions of 0.1 - 4.0mm trigger key travel and break key travel segmentation.

[0019] As another improvement of the digital infrared optoelectronic sensor shaft key switch of the utility model, the digital optoelectronic sensor supports a 3 - wire SPI communication protocol serial interface, adopts a daisy - chain serial transmission control method, can achieve high - speed digital signal transmission output, and greatly improves the trigger sensitivity of the shaft switch.

[0020] As another improvement of the digital infrared optoelectronic sensor shaft key switch of the utility model, the digital magnetic sensor integrates and internally installs R / G / B three - way LED drive circuits, and supports external cascaded RGB magic color LED breakpoint continuous transmission.

[0021] In summary, the beneficial effects of the utility model compared with the prior art are:

[0022] This digital infrared optoelectronic sensor shaft switch is configured with an arc-shaped long guiding rib position at the edge of the shaft hole of the shaft cover to cooperate with the shaft handle for a long-stroke motion structure, enabling the outer side of the shaft handle to move in long-stroke cooperation with the arc-shaped guiding rib position of the shaft seat, reducing the swaying amplitude during the movement stroke of the shaft handle; the arc-shaped long guiding rib position and the side surface of the shaft handle are in line contact and cooperation, reducing the frictional resistance and optimizing the feel of the shaft switch when pressing the shaft handle; the digital optoelectronic sensor used in this digital infrared optoelectronic sensor shaft switch has infrared light emission and infrared light reflection and reception detection functions, and can linearly and accurately detect the change in the intensity of infrared reflected light caused by the height difference of the reflection surface. The digital optoelectronic sensor quantifies the induced voltage of the infrared light intensity change into a digital sample value to generate an output high and low level digital signal; the digital optoelectronic sensor used in this digital infrared optoelectronic sensor shaft switch can linearly and accurately detect the induced voltage of the infrared light intensity change during a 0.1 mm stroke of the switch button, and can achieve a trigger sensitivity of 0.1 mm (key travel 4.0 mm), supporting adjustable trigger key travel and break key travel segmentation functions of 0.1 - 4.0 mm; the digital optoelectronic sensor used in this digital infrared optoelectronic sensor shaft switch supports a 3-wire SPI communication protocol serial interface and adopts a daisy-chain serial transmission control method, enabling high-speed digital signal transmission output, greatly improving the trigger sensitivity of the shaft switch; the digital optoelectronic sensor used in this digital infrared optoelectronic sensor shaft switch, with its daisy-chain serial transmission control method, can simplify the keyboard application circuit, reduce the number of required control MCU chips and peripheral electronic components, and greatly reduce the production cost. The digital optoelectronic sensor used in this digital infrared optoelectronic sensor shaft switch integrates an internal R / G / B three-channel LED drive circuit, eliminating the need for an additional chip for light effect drive control in the keyboard application circuit, removing the light control chip, and supporting external cascaded RGB magic color LED breakpoint resumption. The PCB wiring is simple, reducing the number of electronic components and greatly reducing the product cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. is an exploded view of the shaft switch of the present utility model.

[0024] Figure 2 FIG. is a schematic cross-sectional view of the shaft switch of the present utility model

[0025] Figure 3 FIG. is a schematic structural view of the shaft handle of the present utility model.

[0026] Figure 4 FIG. is a schematic structural view of the shaft cover of the present utility model.

[0027] Figure 5 FIG. is a schematic structural view of the shaft base of the present utility model.

[0028] Figure 6This is a schematic diagram of the infrared light emission and reception detection orientation of the present utility model.

[0029] Figure 7 This is a schematic diagram of a typical application circuit of the digital optoelectronic sensor of the present utility model.

[0030] In the figure: 1. PCB board; 2. Digital optoelectronic sensor; 3. Shaft base; 301. Avoidance groove; 302. Fixed buckle position; 4. Shaft cover; 401. Arc-shaped long guiding rib position; 402. Buckle fixing surface; 5. Shaft handle; 6. Shaft handle reflection part; 601. Reflection surface; 7. Return spring; 8. Guide tube; 9. Guide post; 10. Connecting post; 11. Support convex post; 12. Infrared light emission port; 13. Infrared light reception detection port. Specific embodiments

[0031] The following further describes in detail the above and other technical features and advantages of the present utility model with reference to the accompanying drawings.

[0032] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and do not limit the protection scope of the present utility model.

[0033] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0034] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] See Figure 1-7The utility model discloses a digital infrared photoelectric sensor shaft switch, which is used to trigger a digital photoelectric sensor to generate a digital signal. The digital infrared photoelectric sensor shaft switch comprises a shaft cover 4, a shaft base 3 and a shaft handle 5 which is arranged in the shaft cover 4 and can move up and down. A reset spring 7 is arranged at the bottom of the shaft handle 5. A shaft handle reflecting part 6 is arranged on one side wall of the shaft handle 5. A reflecting surface 601 is arranged at the bottom of the shaft handle reflecting part 6. The reflecting surface 601 has a mirror feature and can reflect the received infrared light in a mirror manner.

[0036] In a specific embodiment of the present application, the side walls around the shaft hole where the shaft cover 4 and the shaft handle 5 cooperate are configured with arc-shaped long guide ribs 401, and the arc-shaped long guide ribs 401 and the shaft handle 5 can cooperate with each other in a long stroke up and down, reducing the swing amplitude of the shaft handle 5 during the movement stroke, and the arc-shaped long guide ribs 401 and the shaft handle 5 have a line contact surface, with low friction resistance, which greatly optimizes the feel of the shaft switch when pressing the shaft handle 5. In one embodiment of the present utility model, two arc-shaped long guide ribs 401 are arranged at intervals on each side wall around the shaft hole, and the shaft handle 5 can remain stable in four directions of front, back, left and right through the multiple arc-shaped long guide ribs 401 around, without shaking.

[0037] In order to avoid interference between the shaft handle buckle portion 6 and the shaft base 3 , the shaft base 3 is provided with an avoidance groove 301 corresponding to the shaft handle buckle portion 6 , so that the shaft handle buckle portion 6 will not hit the shaft base 3 when the shaft handle 5 is pressed.

[0038] For easy assembly, the shaft cover 4 is provided with buckle fixing surfaces 402 on both sides, and the shaft base 3 is provided with fixing buckles 302 on both sides. The shaft cover 4 and the shaft base 3 are assembled and fixedly connected through the buckle fixing surfaces 402 and the fixing buckles 302. In the utility model, two buckle holes are arranged at intervals on the buckle fixing surfaces 402, and there are also two fixing buckles 302 matching with them.

[0039] In the utility model, a guide tube 8 is provided in the shaft base 3, the reset spring 7 is sleeved on the outer wall of the guide tube 8, a guide column 9 is provided in the lower end of the shaft handle 5, and the guide column 9 is movably inserted in the guide tube 8. The guide tube 8 and the guide column 9 cooperate with each other, so that the movement of the shaft handle 5 is more stable. The reset spring 7 is sleeved on the outer wall of the guide tube 8, which effectively limits the compression direction of the reset spring 7 and reduces the shaking generated during the movement of the shaft handle 5.

[0040] The utility model is provided with a connecting column 10 on the middle part of the lower end surface of the shaft base 3, and a plurality of supporting convex columns 11 are provided on the outer periphery of the shaft base 3. When in use, the connecting column 10 cooperates with the connecting slot hole of the PCB board 1, and the supporting convex columns 11 press on the PCB board 1 to support and reduce the supporting area, thereby effectively reducing the resonance when the shaft body is struck, thereby effectively reducing noise and silencing.

[0041] The digital infrared photoelectric sensor shaft body on-off keyboard of the utility model comprises a PCB board 1, on which a digital photoelectric sensor 2 is surface-mounted. The digital photoelectric sensor 2 has both infrared light emission and infrared light reflection and reception detection functions, and can linearly detect the change in the intensity of infrared reflected light caused by the height difference of the reflection surface. The digital photoelectric sensor 2 quantifies the induction voltage of the infrared light intensity change into a digital sample value to generate an output high and low level digital signal.

[0042] The digital photoelectric sensor 2 of the utility model can linearly and accurately detect the change in the induction voltage of the infrared light intensity during the 0.1 mm stroke of the switch button, can achieve a trigger sensitivity of 0.1 mm (key travel 4.0 mm), and supports adjustable functions for the trigger key travel and disconnection key travel in the range of 0.1 - 4.0 mm.

[0043] The digital photoelectric sensor 2 of the utility model supports a 3 - wire SPI communication protocol serial interface and adopts a daisy chain transmission method, which can achieve high - speed digital signal transmission output, greatly improving the trigger sensitivity of the shaft body switch.

[0044] The daisy chain serial transmission control method adopted by the digital photoelectric sensor 2 of the utility model can make the keyboard application circuit simple, reduce the number of required control MCU chips and peripheral electronic components, and greatly reduce the production cost.

[0045] The digital photoelectric sensor 2 of the utility model integrates and internally installs R / G / B three - way LED drive circuits, so that no additional chip is required for light effect drive control in the keyboard application circuit, removing the light control chip. Moreover, it supports external cascaded RGB magic color LED break - point continuous transmission, with simple PCB wiring, reducing the number of electronic components and greatly reducing the product cost.

[0046] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification only illustrates the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A digital infrared optoelectronic sensor shaft switch for triggering a digital optoelectronic sensor to generate an output digital signal, comprising a shaft base (3), a shaft cover (4) connected to the shaft base (3), a shaft handle (5) capable of moving up and down is arranged in the shaft base (3) and the shaft cover (4), and a return spring (7) is arranged between the bottom of the shaft handle (5) and the shaft base (3), and is characterized in that: On one side wall of the shaft handle (5), a shaft handle reflection part (6) is provided, and a reflection surface (601) is provided at the bottom end of the shaft handle reflection part (6).

2. The digital infrared optoelectronic sensor shaft body switch according to claim 1, characterized in that: The reflection surface (601) is a mirror surface on the surface layer of the plastic body or a mirror surface of the electroplated coating of the plastic body.

3. The digital infrared optoelectronic sensor shaft switch according to claim 1, characterized in that: An avoidance groove (301) is formed at a position corresponding to the shaft base (3) and the shaft handle reflection part (6).

4. The digital infrared optoelectronic sensor shaft body switch according to claim 1, characterized in that: A fixing buckle position (302) is provided on the shaft base (3), and a buckle position fixing surface (401) is provided on the shaft cover (4). The assembly and fixed connection of the shaft base (3) and the shaft cover (4) are realized through the cooperation of the fixing buckle position (302) and the buckle position fixing surface (401).

5. The digital infrared optoelectronic sensor shaft body switch according to claim 1, wherein: A guide tube (8) is provided inside the shaft base (3), the return spring (7) is sleeved on the outer wall of the guide tube (8), a guide post (9) is provided inside the lower end of the shaft handle (5), and the guide post (9) is movably inserted into the guide tube (8).

6. The digital infrared optoelectronic sensor shaft body switch according to claim 1, wherein: A connecting column (10) is provided in the middle of the lower end surface of the shaft base (3), and a plurality of supporting convex columns (11) are provided on the outer circumference of the shaft base (3).

7. A keyboard, characterized in that: It includes a PCB board (1). On the PCB board (1), there is at least one digital infrared photoelectric sensor shaft body switch as described in any one of claims 1-6. A digital photoelectric sensor (2) corresponding one-to-one to the digital infrared photoelectric sensor shaft body switch is provided on the PCB board (1). The emission port (12) and the reception detection port (13) of the digital photoelectric sensor (2) and the reflection surface (601) form a reflection optical path system.

8. The keyboard according to claim 7, wherein: The emission port (12) is an infrared light emission port, and the reception detection port (13) is an infrared light reflection reception detection port.

9. The keyboard according to claim 7, wherein: The digital photoelectric sensor (2) can linearly detect the change in the infrared light intensity induction voltage caused by the height difference of the reflection surface during the 0.1 mm stroke of the digital photoelectric sensor shaft body switch, and quantize the induction voltage into digital sample values to generate output high and low level digital signals, capable of realizing 0.1 mm triggering and a key travel of 4.0 mm sensitivity. The digital photoelectric sensor (2) is integrated with built-in R / G / B three-channel LED drive circuits and supports external cascaded RGB magic color LED breakpoint continuation transmission.

10. The keyboard according to claim 7, characterized in that: The digital photoelectric sensor (2) supports a 3-wire SPI communication protocol serial interface and adopts a daisy chain serial transmission control method.

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