High-precision 3D magnetic sensor shaft body switch and 3D magnetic sensor shaft body switch keyboard

Abstract

The utility model discloses a high-precision 3D magnetic sensor shaft body switch and a 3D magnetic sensor shaft body switch keyboard, which are used for triggering a high-precision 3D magnetic sensor to generate and output digital signals and comprise a shaft base, a shaft cover connected onto the shaft base, a shaft handle arranged in the shaft base and the shaft cover, and a reset spring arranged between the bottom of the shaft handle and the shaft base. A shaft handle buckling part with an opening structure is arranged on one side wall of the shaft handle, and a permanent magnet is arranged in the shaft handle buckling part. When the shaft handle is pressed, the shaft handle moves downwards for a long stroke along an arc-shaped long guide rib position structure arranged on the edge of a shaft hole of the shaft cover, meanwhile, the permanent magnet assembled on a buckling position part of the shaft handle moves downwards so as to change the magnetic flux detected by the height difference between the 3D magnetic sensor and the permanent magnet, and the 3D magnetic sensor generates and outputs high-low level digital signals. The utility model has the advantages of simple structure, high triggering accuracy, high reliability, relatively small frictional resistance and good pressing hand feeling, and can effectively reduce the swinging amplitude in the movement stroke of the shaft handle.

Description

Technical Field

[0001] The utility model relates to the technical field of key switches, and in particular to a high-precision 3D magnetic sensor shaft switch; and a switch keyboard comprising the high-precision 3D magnetic sensor shaft switch. Background Art

[0002] At present, ordinary magnetic key switches on the market all use ordinary Hall switch elements, most of which are single-axis linear and can only sense the changes in the magnetic flux of the single-axis Z direction of the key switch. The changes in the size of the magnetic flux of the magnet in the X and Y directions caused by the swing of the magnet inside the magnetic key switch handle due to the gap between the key cover and the key during the movement stroke cannot be detected. Therefore, the electromagnetic signal collected by the ordinary Hall switch element is distorted and inaccurate; in addition, the output signals of ordinary single-axis linear Hall switch elements are all analog signals, and the analog signals need to be converted into digital signals through corresponding electronic components and circuits. Delays will occur during the signal conversion and transmission process. Therefore, ordinary magnetic key switches on the market are prone to electrical malfunctions such as disconnection, false touch and delayed triggering. Especially in competitive games with high transmission rate requirements, the above-mentioned electrical malfunctions are extremely obvious when ordinary magnetic key switches are used.

[0003] Ordinary magnetic push switches on the market mostly have a short stroke coordination between the button handle and the key cover movement guide. The button handle has a large swing amplitude and large friction resistance when moving in the key cover, resulting in a poor feel when pressing. Moreover, since the button handle has a large swing amplitude when moving up and down, the magnetic flux of the magnet collected by the Hall switch element at the bottom of the ordinary magnetic push switch is unstable, and the analog signal output by the corresponding Hall switch element is distorted, unstable, and inaccurate, which has an adverse effect on the electrical performance of the magnetic push switch.

[0004] Therefore, the existing magnetic key switch and the switch keyboard with the magnetic key switch need to be further improved. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a high-precision 3D magnetic sensor shaft switch with a simple structure, which can effectively reduce the swing amplitude of the shaft handle during its movement stroke, has high triggering accuracy and reliability, relatively small friction resistance, and good pressing feel.

[0006] Another object of the present invention is to provide a switch keyboard including the above-mentioned 3D magnetic sensor shaft switch.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following scheme: a high-precision 3D magnetic sensor shaft switch, used to trigger the high-precision 3D magnetic sensor to generate an output digital signal, including a shaft base, a shaft cover connected to the shaft base, a shaft handle capable of up and down stroke movement is arranged in the shaft base and the shaft cover, a reset spring is arranged between the bottom of the shaft handle and the shaft base, and it is characterized in that: a shaft handle buckling portion with an opening structure is arranged on one side wall of the shaft handle, and a permanent magnet is arranged in the shaft handle buckling portion. The permanent magnet is limited and tightly installed in the buckling part of the shaft handle, and the edge of the shaft cover shaft hole that matches the shaft handle is constructed with an arc-shaped long guide rib structure that enables the shaft handle to stably move up and down; when the shaft handle is pressed, the shaft handle moves downward along the arc-shaped long guide rib structure provided on the edge of the shaft cover shaft hole, and at the same time, the permanent magnet mounted on the buckling part of the shaft handle moves downward to change the size of the magnetic flux detected due to the height difference between the 3D magnetic sensor and the permanent magnet, and the 3D magnetic sensor generates and outputs high and low level digital signals; the shaft base is constructed with an avoidance groove that matches the buckling part of the shaft handle, and the buckling part of the shaft handle can avoid motion interference with the shaft base during stroke movement through the avoidance groove.

[0008] As another improvement of the high-precision 3D magnetic sensor shaft switch of the utility model, the top of the shaft handle buckle part is provided with a positioning groove for installing a permanent magnet, the two sides of the shaft handle buckle part are provided with limit buckles, and the bottom of the shaft handle buckle part is provided with a limit groove matching the permanent magnet. The positioning groove is used for pre-positioning when installing the permanent magnet.

[0009] As another improvement of the high-precision 3D magnetic sensor shaft switch of the utility model, a limiting protrusion is configured inside the limiting buckle, and the limiting groove is provided with a limiting surface matching the shape of the permanent magnet. Under the action of external force, the permanent magnet is squeezed from the positioning groove to pass over the limiting protrusion and is inserted into the limiting protrusion and the limiting surface to be tightly fitted.

[0010] As another improvement of the high-precision 3D magnetic sensor shaft switch of the utility model, the permanent magnet is a cylindrical permanent magnet or a cubic permanent magnet. The limiting protrusion and limiting surface are protrusions and grooves that correspond to and match the shape of the cylindrical or cubic magnet.

[0011] As another improvement of the high-precision 3D magnetic sensor shaft switch of the utility model, avoidance grooves are provided at positions corresponding to the buckling portion of the shaft base and the shaft handle.

[0012] As another improvement of the high-precision 3D magnetic sensor shaft switch of the utility model, a fixed buckle is provided on the shaft base, and a buckle fixing surface is provided on the shaft cover, and the shaft base and the shaft cover are assembled and fixedly connected by the cooperation of the fixed buckle and the buckle fixing surface.

[0013] As another improvement of the high-precision 3D magnetic sensor shaft switch of the utility model, a guide tube is provided in the shaft base, the reset spring is sleeved on the outer wall of the guide tube, a guide column is provided in the lower end of the shaft handle, and the guide column is movably inserted in the guide tube.

[0014] As another improvement of the high-precision 3D magnetic sensor shaft switch of the utility model, a connecting column is provided on the middle part of the lower end surface of the shaft base, and a plurality of supporting protrusions are provided on the outer periphery of the shaft base.

[0015] The utility model discloses a 3D magnetic sensor shaft switch keyboard, characterized in that it includes a PCB board, at least one high-precision 3D magnetic sensor shaft switch as described in any one of the above-mentioned types is disposed on the PCB board, and 3D magnetic sensors corresponding one-to-one to the high-precision 3D magnetic sensor shaft switches are arranged on the PCB board.

[0016] As another improvement of the 3D magnetic sensor shaft switch keyboard of the utility model, the 3D magnetic sensor supports two communication protocol serial interfaces: IC bus interface and SPI. The two communication protocols are optional, which can realize high-speed digital signal transmission output and improve the trigger sensitivity of the shaft switch.

[0017] As another improvement of the 3D magnetic sensor shaft switch keyboard described in the utility model, the high-precision 3D magnetic sensor has 3D linear magnetic induction detection functions in the X, Y, and Z directions; it can accurately detect the changes in the magnetic flux size of the 3D spatial magnetic field caused by the slight shaking of the permanent magnet in the movement stroke of the permanent magnet of the shaft handle buckle part due to the gap between the permanent magnet and the shaft cover, resulting in the swaying on the east, west, south, and north sides to generate high and low level signals.

[0018] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0019] The high-precision 3D magnetic sensor shaft switch is designed with a long-stroke motion structure that matches the shaft handle with the arc-shaped long guide ribs on the edge of the shaft cover shaft hole, so that the outer side of the shaft handle can move in coordination with the long-stroke arc-shaped guide ribs of the shaft seat, thereby reducing the swing amplitude of the shaft handle during the movement stroke; the arc-shaped long guide ribs and the side of the shaft handle are in line contact, which reduces friction resistance and optimizes the feel of the shaft switch when pressing the shaft handle; the high-precision 3D magnetic sensor used in this high-precision 3D magnetic sensor shaft switch has the function of spatial magnetic induction detection in the X, Y, and Z directions, and can accurately detect The changes in the size of the spatial magnetic field flux caused by the swinging of the permanent magnet on the east, west, south and north sides due to the slight shaking of the permanent magnet caused by the clearance with the shaft seat during the movement of the permanent magnet in the buckle part of the shaft handle are measured to generate high and low level signals, thereby enhancing the triggering accuracy and reliability of the shaft switch; the high-precision 3D magnetic sensor used in this high-precision 3D magnetic sensor shaft switch supports two communication protocol serial interfaces, I2C bus interface and 4-wire SPI. The two communication protocols are available for selection, which can realize high-speed digital signal transmission output and improve the triggering sensitivity of the shaft switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an exploded view of the shaft switch of the utility model using a cylindrical permanent magnet.

[0021] Figure 2 This is an exploded view of the shaft switch of the utility model using a cube-shaped permanent magnet.

[0022] Figure 3 It is a schematic structural diagram of the shaft handle of the cylindrical permanent magnet in the utility model.

[0023] Figure 4 It is a partial enlarged view of the shaft handle buckle portion of the cylindrical permanent magnet in the utility model.

[0024] Figure 5 It is a structural schematic diagram of the shaft handle of the square-shaped permanent magnet in the utility model.

[0025] Figure 6 It is a partial enlarged view of the shaft handle buckle portion of the square permanent magnet in the utility model.

[0026] Figure 7 This is a schematic diagram of the shaft cover structure of the utility model.

[0027] Figure 8 This is a schematic diagram of the shaft base structure of the utility model.

[0028] In the figure: 1. PCB board; 2. 3D magnetic sensor; 3. shaft base; 301. avoidance 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. limit buckle; 6002. limit protrusion; 603. limit groove; 6003. limit surface; 7. reset spring; 8. permanent magnet; 9. guide tube; 10. guide column; 11. connecting column; 12. supporting boss. DETAILED DESCRIPTION

[0029] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0031] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the 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. Therefore, it cannot be understood as a limitation on the present invention.

[0032] In addition, it should be noted that in the description of the present invention, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] See also Figure 1-8The utility model discloses a high-precision 3D magnetic sensor shaft switch, which is used for a high-precision 3D magnetic sensor to generate a digital signal. The 3D magnetic 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 buckle portion 6 with an opening structure is arranged on one side wall of the shaft handle 5. A cylindrical or square permanent magnet 8 is mounted on the shaft handle buckle portion 6. The cylindrical or square permanent magnet 8 is tightly installed in the shaft handle buckle portion 6. A positioning groove 601 is arranged at the top of the shaft handle buckle portion 6 for facilitating the installation of the cylindrical or square permanent magnet 8. Limit buckles 602 are arranged on both sides of the shaft handle buckle portion 6. A limiting groove 603 matching the buckle is arranged at the bottom of the shaft handle buckle portion 6. A retaining groove 603 matching the outer shape of the cylindrical or square permanent magnet 8 is arranged inside the limiting buckle 602. The limiting protrusion 6002 of the limiting groove 603 is provided with a limiting surface 6003 matching the shape of the cylindrical or square permanent magnet 8: the cylindrical or square permanent magnet 8 is squeezed from the positioning groove 601 under the action of external force, passes over the limiting protrusion 6002, and is inserted into the limiting protrusion 6002 and the limiting surface 6003 to be tightly fitted and installed; the opening structure of the shaft handle buckle portion 6 is made of plastic material and has a certain elasticity, which can make the cylindrical or square permanent magnet 8 The permanent magnet 8 forcibly stretches the limiting protrusion 6002, and after the cylindrical or square permanent magnet 8 enters the limiting groove 603, the limiting protrusion 6002 can quickly rebound and reset, and the cylindrical or square permanent magnet 8 is tightly confined between the limiting protrusion 6002 and the limiting surface 6003. Compared with the interference fit forced tight assembly and glue bonding assembly processing technology, this assembly method is simple to assemble and is more conducive to automated equipment and process automated assembly operations.

[0034] 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 provided with arc-shaped long guide ribs 401. The arc-shaped long guide ribs 401 and the shaft handle 5 can cooperate with each other to move up and down over a long stroke, thereby reducing the amplitude of the swinging movement of the shaft handle 5 during the movement stroke. The contact surface between the arc-shaped long guide ribs 401 and the shaft handle 5 is line contact, with small friction resistance, which greatly optimizes the feel of the shaft switch when the shaft handle 5 is pressed.

[0035] 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.

[0036] For easy assembly, buckle fixing surfaces 401 are provided on both sides of the shaft cover 4, and fixing buckles 302 are provided on both sides of the shaft base 3. The shaft cover 4 and the shaft base 3 are assembled and fixedly connected through the buckle fixing surfaces 401 and the fixing buckles 302.

[0037] In the utility model, a guide tube 9 is provided in the shaft base 3, the reset spring 7 is sleeved on the outer wall of the guide tube 9, and a guide column 10 is provided in the lower end of the shaft handle 5, and the guide column 10 is movably inserted in the guide tube 9. The guide tube 9 and the guide column 10 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 9, which effectively limits the compression direction of the reset spring 7 and reduces the shaking generated during the movement of the shaft handle 5.

[0038] The utility model is provided with a connecting column 11 on the middle of the lower end surface of the shaft base 3, and a plurality of supporting convex columns 12 are provided on the outer periphery of the shaft base 3. When in use, the connecting column 11 cooperates with the connecting slot hole of the PCB board 1, and the supporting convex columns 12 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.

[0039] The utility model discloses a 3D magnetic sensor shaft switch keyboard, comprising a PCB board 1, on which a high-precision 3D magnetic sensor 2 is patched, the 3D magnetic sensor 2 has the function of magnetic induction detection in the X, Y and Z directions, and supports two communication protocol serial interfaces, an I2C bus interface and a 4-wire SPI. The two communication protocols are optional for use, and high-speed digital signal transmission can be realized. The utility model can accurately detect the change in the size of the magnetic flux of the spatial magnetic field caused by the swinging of the east, west, south and north sides caused by the slight shaking of the permanent magnet generated by the matching gap between the shaft handle and the shaft cover during the movement stroke of the permanent magnet at the shaft handle buckle part 6, so as to generate high and low level signals, thereby enhancing the triggering accuracy and reliability of the shaft switch, and improving the triggering sensitivity of the shaft switch.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-precision 3D magnetic sensor shaft switch, used for triggering a high-precision 3D magnetic 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 up and down stroke movement arranged in the shaft base (3) and the shaft cover (4), a return spring (7) arranged between the bottom of the shaft handle (5) and the shaft base (3), characterized in that: A shaft handle buckling portion (6) having an opening structure is provided on a side wall of the shaft handle (5), and a permanent magnet (8) is provided in the shaft handle buckling portion (6).

2. The high-precision 3D magnetic sensor shaft switch according to claim 1, characterized in that: The top of the shaft handle buckle portion (6) is provided with a positioning groove (601) for installing the permanent magnet (8), both sides of the shaft handle buckle portion (6) are provided with limiting buckles (602), and the bottom of the shaft handle buckle portion (6) is provided with a limiting groove (603) matching the permanent magnet (8).

3. The high-precision 3D magnetic sensor shaft switch according to claim 2, characterized in that: The limiting buckle (602) is provided with a limiting protrusion (6002) inside, and the limiting groove (603) is provided with a limiting surface (6003) matching the shape of the permanent magnet (8).

4. The high-precision 3D magnetic sensor shaft switch according to claim 1, characterized in that: The permanent magnet (8) is a cylindrical permanent magnet or a cubic permanent magnet.

5. The high-precision 3D magnetic sensor shaft switch according to claim 1, characterized in that: An avoidance groove (301) is provided at a position corresponding to the shaft base (3) and the shaft handle buckling portion (6).

6. The high-precision 3D magnetic sensor shaft 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 fixing buckle position (302) cooperates with the buckle position fixing surface (401) to achieve an assembled fixed connection between the shaft base (3) and the shaft cover (4).

7. The high-precision 3D magnetic sensor shaft switch according to claim 1, characterized in that: A guide tube (9) is provided in the shaft base (3), the return spring (7) is sleeved on the outer wall of the guide tube (9), a guide column (10) is provided in the lower end of the shaft handle (5), and the guide column (10) is movably inserted in the guide tube (9).

8. The high-precision 3D magnetic sensor shaft switch according to claim 1, characterized in that: A connecting column (11) is provided on the middle portion of the lower end surface of the shaft base (3), and a plurality of supporting protruding columns (12) are provided on the outer periphery of the shaft base (3).

9. A 3D magnetic sensor shaft switch keyboard, characterized in that: The invention comprises a PCB board (1), on which is disposed at least one high-precision 3D magnetic sensor shaft switch according to any one of claims 1 to 8, and on which are disposed 3D magnetic sensors (2) corresponding one to one with the high-precision 3D magnetic sensor shaft switch.

10. The 3D magnetic sensor shaft switch keyboard according to claim 9, characterized in that: The 3D magnetic sensor (2) supports two communication protocol serial interfaces: an I2C bus interface and a 4-wire SPI.

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