High-precision digital sensor shaft body opening key disc

Abstract

This utility model discloses a high-precision digital sensor keypad switch keyboard, characterized by: including a PCB board, on which at least one digital magnetic sensor keypad switch is disposed; and on which a digital magnetic sensor is disposed, capable of linearly and accurately detecting the change in magnetic flux in the Z-axis direction caused by the height difference of the permanent magnet within the keypad switch, and quantifying it into a digital sample value to generate a high or low level digital signal output. The digital magnetic sensor and the keypad switch are configured in a one-to-one correspondence. The purpose of this utility model is to overcome the shortcomings of the prior art and provide a digital magnetic sensor keypad switch keyboard with a simple structure, low cost, effectively reducing the wobbling amplitude during the keypad's movement stroke, high triggering accuracy and reliability, relatively low frictional resistance, good tactile feel, and ultra-low latency.

Description

Technical Field

[0001] This utility model relates to the field of key switch technology, specifically to a high-precision digital magnetic sensor shaft switch keyboard. Background Technology

[0002] Currently, most ordinary magnetic push-button switches on the market use common Hall effect switching elements, which are mostly single-axis linear. They can only sense changes in the magnetic flux of the magnet in the Z-direction of a single axis of the push-button switch. Their output signals are all analog signals, and they need to be converted into digital signals by corresponding electronic components and circuits. Delays will occur during the signal conversion and transmission process. Therefore, ordinary magnetic push-button switches on the market are prone to electrical malfunctions such as missed contacts, false contacts, and delayed triggering. These electrical malfunctions are particularly noticeable when using ordinary magnetic push-button switches in competitive games with high transmission speed requirements.

[0003] In ordinary magnetic push button switches on the market, the movement guide between the button handle and the key cover is mostly a short-stroke fit. When the handle moves through the key cover, the large amplitude of the wobble and the high frictional resistance result in a poor feel when pressing. Moreover, because of the large amplitude of the wobble when the handle moves up and down, the magnetic flux collected by the Hall switch element at the bottom of the ordinary magnetic push button switch is unstable. Consequently, the analog signal output by the Hall switch element is distorted, unstable, and inaccurate, which has an adverse effect on the electrical performance of the magnetic push button switch.

[0004] Existing digital magnetic sensors, due to their X, Y, and Z axis spatial magnetic field sensing and detection capabilities, have high accuracy in measuring spatial magnetic flux, but their cost is higher compared to single-axis Hall effect switching elements.

[0005] Keyboards on the market that use ordinary Hall effect switches and magnetic key switches require dedicated chips for RGB LED lighting effects, resulting in more PCB circuitry, a larger number of lighting control chips and electronic components, and higher costs.

[0006] Therefore, existing switch keyboards with magnetic key switches need further improvement. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a digital magnetic sensor switch keyboard that is simple in structure, low in cost, can effectively reduce the swaying amplitude during the movement of the switch, has high triggering accuracy and reliability, relatively low frictional resistance, good pressing feel, and ultra-low latency.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-precision digital magnetic sensor shaft switch keyboard, characterized in that: it includes a PCB board, on which at least one digital magnetic sensor shaft switch is disposed, and on which a digital magnetic sensor is disposed, capable of linearly and accurately detecting the change in magnetic flux in the Z-axis direction caused by the height difference of the permanent magnet in the digital magnetic sensor shaft switch, and quantifying it into a digital sample value to generate a high and low level digital signal output, wherein the digital magnetic sensor and the digital magnetic sensor shaft switch are configured in a one-to-one correspondence.

[0009] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, the digital magnetic sensor can linearly and accurately detect the change in magnetic flux induced voltage in the Z-axis direction during the 0.1mm travel of the switch key, and can achieve a trigger sensitivity of 0.1mm (key travel 4.0mm).

[0010] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, the digital magnetic sensor supports the SPI communication protocol serial interface and adopts the daisy-chain serial transmission control method.

[0011] As another improvement to the high-precision digital magnetic sensor keypad of this invention, the digital magnetic sensor integrates a built-in R / G / B three-channel LED driving circuit, which supports the resume function of external cascaded RGB LEDs.

[0012] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, the digital magnetic sensor shaft switch includes a shaft base, a shaft cover connected to the shaft base, a shaft handle that can move up and down inside the shaft base and the shaft cover, a return spring between the bottom of the shaft handle and the shaft base, a shaft handle latching part with an open structure on one side wall of the shaft handle, and a permanent magnet inside the shaft handle latching part.

[0013] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, the top of the shaft buckle is provided with a positioning groove for mounting a permanent magnet, the two sides of the shaft buckle are provided with limiting buckles, and the bottom of the shaft buckle is provided with a limiting groove that matches the permanent magnet.

[0014] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, the limiting buckle is provided with a limiting protrusion inside, and the limiting groove is provided with a limiting surface that matches the shape of the permanent magnet.

[0015] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, the permanent magnet is a cylindrical permanent magnet or a cuboid permanent magnet.

[0016] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, a clearance groove is provided at the corresponding position of the shaft base and the shaft handle fastening part.

[0017] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, a fixing buckle is provided on the shaft base and a buckle fixing surface is provided on the shaft cover. The fixing buckle and the buckle fixing surface cooperate to realize the assembly and fixing connection between the shaft base and the shaft cover.

[0018] As another improvement to the high-precision digital magnetic sensor shaft switch keyboard of this utility model, a guide tube is provided inside the shaft base, the reset spring is sleeved on the outer wall of the guide tube, and a guide post is provided inside the lower end of the shaft handle, the guide post being movably inserted into the guide tube.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This high-precision digital magnetic sensor shaft switch utilizes a long-stroke motion structure with an arc-shaped guide rib on the edge of the shaft cover and shaft hole, allowing the outer side of the shaft to move in long-stroke coordination with the arc-shaped guide rib, reducing the amplitude of wobbling during the shaft's movement. The arc-shaped guide rib and the side of the shaft make line contact, reducing frictional resistance and optimizing the feel of the switch when pressing the shaft. The digital magnetic sensor used in this high-precision digital magnetic sensor shaft switch can linearly and accurately detect changes in magnetic flux along a single Z-axis due to differences in the height of the permanent magnet. The digital magnetic sensor quantifies the induced voltage of the magnetic flux change into a digital sample value to generate high and low level digital signals. The high-precision digital magnetic sensor used in this digital magnetic sensor shaft switch can linearly and accurately detect changes in the induced voltage of the magnetic flux during a 0.1mm travel of the switch button, achieving 0. With a 1mm trigger (4.0mm key travel) sensitivity, this high-precision digital magnetic sensor switch supports adjustable trigger and disconnect key travel segments from 0.1-4.0mm. The digital magnetic sensor used in this switch supports a 3-wire SPI communication protocol serial interface and employs a daisy-chain serial transmission control method, enabling high-speed digital signal transmission and output, significantly improving the switch's trigger sensitivity. Compared to existing digital magnetic sensors, this switch eliminates the X and Y axis magnetic flux sensing detection functions, retaining only the Z-axis single-axis sensing detection function, greatly reducing component costs. Furthermore, the daisy-chain serial transmission control method used in this high-precision digital magnetic sensor switch simplifies the keyboard application circuit, reducing the number of required control MCU chips and peripheral electronic components, thus significantly lowering production costs. This high-precision digital magnetic sensor switch uses a digital magnetic sensor that integrates a built-in R / G / B three-channel LED driver circuit. This eliminates the need for additional chips for lighting effect control in keyboard application circuits, removing the need for a separate lighting control chip. Furthermore, it supports external cascaded RGB LEDs with breakpoint resume capability, simplifying PCB layout, reducing the number of electronic components, and significantly lowering product costs. Attached Figure Description

[0021] Figure 1 This is an exploded view of the shaft switch of this utility model that uses a cylindrical permanent magnet.

[0022] Figure 2 This is an exploded view of the shaft switch of this utility model that uses a cuboid permanent magnet.

[0023] Figure 3 This is a schematic diagram of the structure of the shaft of the cylindrical permanent magnet in this utility model.

[0024] Figure 4 This is a partially enlarged view of the shaft and shank fastening part of the cylindrical permanent magnet in this utility model.

[0025] Figure 5 This is a schematic diagram of the shaft of the cubic permanent magnet of this utility model.

[0026] Figure 6 This is a partially enlarged view of the shaft and shank fastening part of the cubic permanent magnet of this utility model.

[0027] Figure 7 This is a schematic diagram of the shaft cover structure of this utility model.

[0028] Figure 8 This is a schematic diagram of the shaft base structure of this utility model.

[0029] Figure 9 This is a schematic diagram of the Z-axis magnetic orientation of the digital magnetic sensor of this utility model.

[0030] Figure 10 This is a schematic diagram of a typical application circuit for the digital magnetic sensor of this utility model.

[0031] In the diagram: 1. PCB board; 2. Digital magnetic sensor; 3. Shaft base; 301. Clearance groove; 302. Fixing buckle; 4. Shaft cover; 401. Arc-shaped long guide rib; 402. Buckle fixing surface; 5. Shaft handle; 6. Shaft handle buckle part; 601. Positioning groove; 602. Limiting buckle; 6002. Limiting protrusion; 603. Limiting groove; 6003. Limiting surface; 7. Return spring; 8. Permanent magnet; 9. Guide tube; 10. Guide post; 11. Connecting post; 12. Supporting protrusion. Detailed Implementation

[0032] The above-mentioned and other technical features and advantages of this utility model will be described in more detail below with reference to the accompanying drawings.

[0033] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0035] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] See Figure 1-10 This utility model discloses a high-precision digital magnetic sensor shaft switch keyboard, including a PCB board 1, on which at least one digital magnetic sensor shaft switch is disposed. On the PCB board 1, a digital magnetic sensor 2 is disposed, which can linearly and accurately detect the change in magnetic flux in the Z-axis direction caused by the height difference of the permanent magnet 8 inside the digital magnetic sensor shaft switch, and quantify it into a digital sample value to generate a high and low level digital signal output. The digital magnetic sensor 2 is disposed in a one-to-one correspondence with the digital magnetic sensor shaft switch.

[0037] The high-precision digital sensor shaft switch of this utility model uses a digital magnetic sensor 2, which can linearly and accurately detect the change in magnetic flux and induced voltage during the 0.1mm travel of the switch button. It can achieve a trigger sensitivity of 0.1mm (key travel 4.0mm) and supports adjustable trigger key travel and disconnect key travel segmentation function from 0.1 to 4.0mm.

[0038] The high-precision digital magnetic sensor shaft switch of this utility model uses a high-precision digital magnetic sensor 2, which supports a 3-wire SPI communication protocol serial interface and adopts a daisy-chain serial transmission control method, which can realize high-speed digital signal transmission output and greatly improve the triggering sensitivity of the shaft switch.

[0039] The high-precision digital magnetic sensor shaft switch of this utility model uses a high-precision digital magnetic sensor 2 and adopts a daisy-chain serial transmission control method, which simplifies the keyboard application circuit and reduces the number of control MCU chips and peripheral electronic components required.

[0040] The high-precision digital magnetic sensor shaft switch of this utility model uses a high-precision digital magnetic sensor 2, which integrates a built-in R / G / B three-channel LED driving circuit, supports external cascaded RGB color LED breakpoint resume transmission, simplifies PCB wiring, eliminates the keyboard lighting effect control chip, and reduces the number of electronic components.

[0041] The digital magnetic sensor shaft switch of this utility model includes a shaft base 3, a shaft cover 4 connected to the shaft base 3, a shaft handle 5 that can move up and down inside the shaft base 3 and the shaft cover 4, a return spring 7 between the bottom of the shaft handle 5 and the shaft base 3, a shaft handle latching part 6 with an open structure on one side wall of the shaft handle 5, and a permanent magnet 8 inside the shaft handle latching part 6.

[0042] In this invention, a cylindrical or square permanent magnet 8 is tightly and securely installed within the shaft retaining part 6. The top of the shaft retaining part 6 has a positioning groove 601 to facilitate the pre-positioning of the cylindrical or square permanent magnet 8. Limiting retaining parts 602 are provided on both sides of the shaft retaining part 6, and a limiting groove 603 matching the retaining parts is provided at the bottom of the shaft retaining part 6. The limiting retaining part 602 has a limiting protrusion 6002 matching the shape of the cylindrical or square permanent magnet 8, and the limiting groove 603 has a limiting surface 6003 matching the shape of the cylindrical or square permanent magnet 8. Under external force, the cylindrical or square permanent magnet 8 self-positions within the positioning groove 601. The cylinder or square permanent magnet 8 is squeezed past the limiting protrusion 6002 and inserted into the limiting protrusion 6002 and the limiting surface 6003 for a tight fit. The opening structure of the shaft retaining part 6 is made of plastic and has a certain degree of elasticity, which allows the cylindrical or square permanent magnet 8 to forcibly open the limiting protrusion 6002. After the cylindrical or square permanent magnet 8 enters the limiting groove 603, the limiting protrusion 6002 can quickly spring back to its original position. The cylindrical or square permanent magnet 8 is tightly confined in the limiting protrusion 6002 and the limiting surface 6003. Compared with interference fit and glue bonding assembly processes, this assembly method is simpler and more conducive to automated assembly operations of automated equipment.

[0043] In a specific embodiment of this application, the sidewalls around the shaft hole where the shaft cover 4 and the shaft handle 5 mate are provided with arc-shaped long guide ribs 401. The arc-shaped long guide ribs 401 and the shaft handle 5 can move up and down in a long stroke, which reduces the swing amplitude during the movement of the shaft handle 5. In addition, the contact surface between the arc-shaped long guide ribs 401 and the shaft handle 5 is a line contact, with low frictional resistance, which greatly optimizes the feel of the shaft switch when pressing the shaft handle 5.

[0044] In one embodiment of this utility model, two arc-shaped long guide ribs 401 are respectively provided at intervals on each side wall around the shaft hole. The multiple arc-shaped long guide ribs 401 around the shaft hole enable the shaft handle 5 to remain stable in four directions (front, back, left, and right) without shaking.

[0045] To avoid interference between the shaft handle latching part 6 and the shaft base 3, the shaft base 3 is provided with a relief groove 301 corresponding to the position of the shaft handle latching part 6, so that the shaft handle latching part 6 will not hit the shaft base 3 when the shaft handle 5 is pressed.

[0046] For ease of assembly, the shaft cover 4 has snap-fit ​​fixing surfaces 402 on both sides, and the shaft base 3 has fixing snaps 302 on both sides. The shaft cover 4 and the shaft base 3 are assembled and fixedly connected through the snap-fit ​​fixing surfaces 402 and the fixing snaps 302. In this utility model, two snap-fit ​​holes are provided at intervals on the snap-fit ​​fixing surfaces 402, and there are also two matching fixing snaps 302.

[0047] In this invention, a guide tube 9 is provided inside the shaft base 3, and a return spring 7 is sleeved on the outer wall of the guide tube 9. A guide post 10 is provided inside the lower end of the shaft handle 5, and the guide post 10 is movably inserted into the guide tube 9. The cooperation between the guide tube 9 and the guide post 10 makes the movement of the shaft handle 5 more stable. The return spring 7, sleeved on the outer wall of the guide tube 9, effectively restricts the compression direction of the return spring 7, reducing the shaking generated during the movement of the shaft handle 5.

[0048] This invention features a connecting post 11 on the lower end face of the shaft base 3 and multiple supporting protrusions 12 on the outer periphery of the shaft base 3. In use, the connecting post 11 engages with the connecting slot of the PCB board 1, and the supporting protrusions 12 press against the PCB board 1, providing support and reducing the support area, thereby effectively reducing resonance when the shaft is struck, and thus effectively reducing noise.

[0049] 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 technical scope 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 the claims.

Claims

1. A high-precision digital sensor keypad with a switch body, characterized in that: The device includes a PCB board (1), on which at least one digital magnetic sensor shaft switch is provided. On the PCB board (1), a digital magnetic sensor (2) is provided that can linearly and accurately detect the change in magnetic flux in the Z-axis direction caused by the height difference of the permanent magnet (8) in the digital magnetic sensor shaft switch, and quantify it into a digital sample value to generate a high and low level digital signal output. The digital magnetic sensor (2) is provided in a one-to-one correspondence with the digital magnetic sensor shaft switch.

2. The high-precision digital sensor shaft switch keyboard according to claim 1, characterized in that: The digital magnetic sensor (2) can linearly and accurately detect the change in magnetic flux induced voltage in the Z-axis direction during the 0.1mm travel of the switch button, and can achieve a trigger sensitivity of 0.1mm, wherein the key travel of the switch button is 4.0mm.

3. A high-precision digital sensor shaft switch keyboard according to claim 1, characterized in that: The digital magnetic sensor (2) supports a 3-wire SPI communication protocol serial interface and adopts a daisy-chain serial transmission control method. The digital magnetic sensor (2) integrates a built-in R / G / B three-channel LED driving circuit and supports external cascaded RGB color LED breakpoint resume transmission.

4. A high-precision digital sensor shaft switch keyboard according to claim 1, characterized in that: The digital magnetic sensor shaft switch includes 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 provided in the shaft base (3) and the shaft cover (4), a return spring (7) is provided between the bottom of the shaft handle (5) and the shaft base (3), a shaft handle latching part (6) with an open structure is provided on one side wall of the shaft handle (5), and a permanent magnet (8) is provided in the shaft handle latching part (6).

5. A high-precision digital sensor shaft switch keyboard according to claim 4, characterized in that: The top of the shaft retainer (6) is provided with a positioning groove (601) for mounting the permanent magnet (8), the two sides of the shaft retainer (6) are provided with limiting retainers (602), and the bottom of the shaft retainer (6) is provided with a limiting groove (603) that matches the permanent magnet (8).

6. A high-precision digital sensor shaft switch keyboard according to claim 5, characterized in that: The limiting buckle (602) has a limiting protrusion (6002) inside, and the limiting groove (603) has a limiting surface (6003) that matches the shape of the permanent magnet (8).

7. A high-precision digital sensor shaft switch keyboard according to claim 4, characterized in that: The permanent magnet (8) is a cylindrical permanent magnet or a cuboid permanent magnet.

8. A high-precision digital sensor shaft switch keyboard according to claim 4, characterized in that: An clearance groove (301) is provided at the corresponding position of the shaft base (3) and the shaft handle fastening part (6).

9. A high-precision digital sensor shaft switch keyboard according to claim 4, characterized in that: A fixing buckle (302) is provided on the shaft base (3), and a buckle fixing surface (402) is provided on the shaft cover (4). The shaft base (3) and the shaft cover (4) are assembled and fixedly connected by the fixing buckle (302) and the buckle fixing surface (402).

10. A high-precision digital sensor shaft switch keyboard according to claim 4, characterized in that: A guide tube (9) is provided inside the shaft base (3), and the reset spring (7) is sleeved on the outer wall of the guide tube (9). A guide post (10) is provided inside the lower end of the shaft handle (5), and the guide post (10) is movably inserted into the guide tube (9).

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