Non-contact electronic switch

Abstract

The invention discloses a non-contact electronic switch which comprises a shell, a switch is fixedly installed on the shell through a small positioning pin, the height of one end, close to the small positioning pin, of the switch is larger than that of the other end of the switch, and a magnetic base is fixedly installed on one side, close to the small positioning pin, of the switch; the magnetic base is mounted on the shell through a large positioning pin; and a suction plate and a magnet are fixedly mounted on the switch through small positioning pins. Non-contact operation of the switch is achieved through magnetic adsorption and Hall effect detection, abrasion and faults caused by physical contact of a traditional mechanical switch are avoided, the reliability of the switch is remarkably improved, and the service life of the switch is remarkably prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic switches, and in particular to a non-contact electronic switch. Background Art

[0002] As industrial assembly is gradually valued by major manufacturers, the application of power tools is becoming more and more popular. With the continuous development of technology, user needs are constantly increasing, including high-quality requirements for switches. At present, most power tools on the market use mechanical switches with physical contact. The working principle of mechanical switches relies on the direct contact of physical components to achieve the on-off of the circuit. Friction and wear will inevitably occur in this process. Under long-term use, the metal contacts inside the switch will gradually wear due to frequent mechanical actions, resulting in increased contact resistance and even poor contact. This physical loss not only affects the sensitivity and reliability of the switch, but also greatly shortens the overall service life of the power tool, increases maintenance and replacement costs, and is undoubtedly an inconvenience and economic burden for users. Mechanical switches will wear out as the use time increases or decreases. Long-term use will cause the switch to fail or have poor contact, thus greatly reducing the service life of the power tool.

[0003] Therefore, the patent of this invention studies a non-contact electronic switch used in power tools, which uses Hall induction instead of physical contact, reduces wear, greatly increases the service life of the switch, and improves reliability and performance. Summary of the invention

[0004] The present application provides a non-contact electronic switch, which realizes non-contact operation of the switch through magnetic adsorption and Hall effect detection, avoids wear and failure caused by physical contact of traditional mechanical switches, and significantly improves the reliability and service life of the switch.

[0005] The present application provides a non-contact electronic switch, comprising: a housing, a switch is fixedly mounted on the housing through a small positioning pin, the height of one end of the switch close to the small positioning pin is greater than the other end of the switch, and a magnetic seat is fixedly mounted on one side of the switch close to the small positioning pin; The magnetic base is mounted on the housing via a large positioning pin; The switch is fixedly mounted with a suction plate and a magnet via a small positioning pin.

[0006] Preferably, the suction plate is made of iron material, and the magnetic seat is used to adsorb the suction plate made of iron material.

[0007] Preferably, a mounting frame is fixedly installed in the housing, a Hall detection module and a control board are fixedly installed on the mounting frame, and the Hall detection module and the control board are electrically connected via a wired cable.

[0008] Preferably, the signal output mode of the Hall detection module is an open collector output mode, the collector of the output transistor is connected to the output end, and the emitter is grounded. When the output transistor is turned on, the output end is at a low potential; when the output transistor is turned off, the output end is in a high impedance state, that is, it is not connected to any voltage source and is in a high impedance state.

[0009] Preferably, the Hall detection module includes a Hall sensor and a resistor R1, the resistor R1 is used to limit current, the Hall sensor includes pin one, pin two and pin three, the pin one is connected to the positive pole of the power supply through a wire, the pin two is grounded through a wire, and the pin three is a signal output end, which is used to sense the magnetic field signal and convert it into an electrical signal output.

[0010] Preferably, the method for calibrating the magnetic base and the suction plate is: S101, install the magnetic base and suction plate on the standard test platform; S102, measuring the magnetic force of the magnetic base using a magnetic calibrator; S103, comparing the measured magnetic force with the initial data of the magnetic base, and adjusting the magnetic force of the magnetic base; S104, use the environmental simulation box to calibrate the magnetic base and the suction plate.

[0011] Preferably, according to the calibration requirements of the magnetic base, determine the center point of the magnetic base as the measurement position, use a marking tool to mark the position of the measurement point on the magnetic base, place the magnetic base on a standard test platform with the measurement point facing upward, adjust the position and height of the test platform, turn on the power of the magnetic calibrator, and move the probe close to the measurement point of the magnetic base until the two are in full contact, and read and record the displayed magnetic data.

[0012] Preferably, the data includes the magnitude and direction of the magnetic force, and the average value of the magnetic force is calculated as the final result.

[0013] Preferably, the initial data is compared with the final result obtained by measurement, the magnetic force of the magnetic base is adjusted using a magnetic calibrator, and the calibrated magnetic base and the suction plate are subjected to an adsorption test.

[0014] Preferably, an environmental simulation box is used to set different environmental conditions of high temperature, low temperature, and humidity. Under each environmental condition, the calibration process from step S101 to step S102 is repeated to ensure that the magnetic base and the suction plate can remain stable under various conditions.

[0015] One or more technical solutions provided in the present application have at least the following technical effects or advantages: non-contact operation of the switch is achieved through magnetic adsorption and Hall effect detection, which avoids wear and failure caused by physical contact of traditional mechanical switches, significantly improves the reliability and service life of the switch, the switch body is made of non-magnetic materials such as nylon, has good wear resistance, corrosion resistance and insulation properties, ensures the stability and safety of the switch in various harsh environments, the Hall detection module can quickly respond to changes in magnetic field strength and convert it into electrical signals, realizes fast and accurate detection of the switch state, and improves the response speed and accuracy of the entire system; The Hall detection module adopts the Hall sensing principle and can detect without physical contact with the target object, thus avoiding wear and failure caused by physical contact and improving the reliability and service life of the equipment. The signal output mode of this module adopts the collector open output mode, which has the characteristics of outputting high impedance state, can prevent unnecessary current flow and protect the circuit from damage. The Hall sensor can accurately sense the changes in the external magnetic field and generate corresponding voltage signals according to these changes, thereby ensuring the sensitivity and accuracy of the detection. The resistor R1 is connected in series between the OUT pin and GND to limit the current and prevent excessive current from causing impact and damage to the circuit; The magnetic force of the calibrated magnetic base and suction plate can remain stable under various environmental conditions, effectively avoiding unstable adsorption or offset caused by changes in magnetic force, improving the stability and reliability of the non-contact electronic switch. The stable magnetic force ensures the rapid response and accurate movement of the non-contact electronic switch during the switching process, improving its overall performance and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a non-contact electronic switch of the present invention; Figure 2 A schematic diagram of the structure of a Hall detection module and a control board according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a switch assembly according to an embodiment of the present invention; Figure 4 is a principle block diagram of a Hall detection module according to an embodiment of the present invention; Figure 5 The figure is a schematic diagram of the calibration process of the magnetic base and the suction plate according to an embodiment of the present invention.

[0017] In the figure: 1. Shell; 2. Large positioning pin; 3. Switch; 4. Magnetic base; 5. Small positioning pin; 6. Mounting bracket; 7. Control board; 8. Hall detection module; 9. Magnet; 10. Suction plate. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings.

[0019] Embodiment 1: Figure 1 1 is a schematic diagram of the structure of a non-contact electronic switch according to an embodiment of the present invention, comprising: a housing 1, a switch 3 is fixedly mounted on the housing 1 through a small positioning pin 5, the height of one end of the switch 3 close to the small positioning pin 5 is greater than the other end of the switch 3, so that the switch 3 is easy to press and release, a magnetic base 4 is fixedly mounted on the side of the switch 3 close to the small positioning pin 5, the magnetic base 4 is mounted on the housing 1 through a large positioning pin 2, a suction plate 10 and a magnet 9 are fixedly mounted on the switch 3 through the small positioning pin 5, the suction plate 10 is made of iron material, so that the suction plate 10 can be adsorbed by the magnetic base 4, the switch 3 is made of nylon material, nylon is a non-magnetic material, and generally has good wear resistance, corrosion resistance and insulation properties, the nylon material of the switch 3 can ensure that the switch 3 will not be disturbed by the magnetic force when pressed, thereby ensuring the accuracy of the opening and closing operations.

[0020] like Figure 2 As shown, a mounting frame 6 is fixedly installed in the housing 1, and a Hall detection module 8 and a control board 7 are fixedly installed on the mounting frame 6. The Hall detection module 8 and the control board 7 are electrically connected through a wired cable to realize module power supply and signal transmission. In the initial state, the magnetic base 4 adsorbs the suction plate 10 through magnetism to keep the magnet 9 away from the Hall detection module 8. The Hall detection module 8, as a sensor based on the Hall effect, can detect changes in the magnetic field and convert them into electrical signals. In the initial state, since the magnet 9 is away from the Hall detection module 8, the magnetic field strength detected by the Hall detection module 8 is weak, so a low-level signal is output. The level signal is then transmitted to the control board 7 via a wired cable; when the switch 3 is pressed, the switch 3 is made of non-magnetic materials such as nylon to ensure that it will not be disturbed by magnetic force during the pressing process. The pressure applied by the finger on the switch 3 gradually increases. When the applied pressure exceeds the adsorption force of the magnetic base 4 on the suction plate 10, the suction plate 10 will be pushed open, and the magnet 9 will move accordingly. As the magnet 9 moves closer, the magnetic field environment of the Hall detection module 8 changes, and the magnetic field strength detected by the Hall detection module 8 increases. This change is captured by the Hall detection module 8 and converted into a high-level signal, which is again transmitted to the control board 7 via a wired cable.

[0021] like Figure 3As shown, the use process of the switch 3 is divided into an initial state, pressing the switch 3 and releasing the switch 3; when the power tool is in an inactive state, that is, when the switch 3 is not pressed, the entire system remains in a stable initial state. At this time, the magnetic base 4 uses its built-in magnetism to firmly adsorb the suction plate 10 on its surface. This design ensures that the magnet 9 (usually connected to or integrated with the suction plate 10) is kept away from the Hall detection module 8. Since a certain distance is maintained between the magnet 9 and the Hall detection module 8, the Hall detection module 8 cannot detect sufficient magnetic field strength, so it will output a low-level signal, which is then transmitted to the control board 7. The control board 7 determines that the power tool is currently in a non-working state based on the received signal, and executes corresponding standby or energy-saving measures accordingly; when the user needs to operate the power tool, the switch 3 is pressed. This pressing action applies a downward force to overcome the adsorption force of the magnetic base 4 on the suction plate 10 (and the magnet 9). As the switch 3 is pressed, the suction plate 10 and the magnet 9 move downward together, gradually When the magnet 9 approaches the Hall detection module 8 and is within the sensing range of the Hall detection module 8, the Hall detection module 8 can detect the change in the magnetic field generated by the magnet 9. This change in the magnetic field triggers the Hall detection module 8 to change its output state from the original low-level signal to a high-level signal. The high-level signal is also transmitted to the control board 7. After receiving the signal, the control board 7 recognizes that the power tool needs to be activated and immediately starts the relevant functions of the power tool, such as motor rotation, cutting, grinding, etc. After the operation is completed, the user releases the switch 3. At this time, the magnetism of the magnetic base 4 comes into play again, quickly pulling the suction plate 10 and the magnet 9 back to their original positions, that is, away from the position of the Hall detection module 8. As the magnet 9 moves away, the Hall detection module 8 cannot detect sufficient magnetic field strength again, so its output signal returns to a low-level state, and the low-level signal is transmitted to the control board 7 again. The control board 7 judges that the power tool has stopped using and may shut down the motor, enter standby mode, or take other energy-saving measures to ensure the safety and energy efficiency of the power tool.

[0022] The technical solution in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: non-contact operation of the switch 3 is realized through magnetic adsorption and Hall effect detection, thereby avoiding wear and failure of the traditional mechanical switch 3 caused by physical contact, and significantly improving the reliability and service life of the switch 3. The main body of the switch 3 is made of non-magnetic materials such as nylon, which has good wear resistance, corrosion resistance and insulation properties, ensuring the stability and safety of the switch 3 in various harsh environments. The Hall detection module 8 can quickly respond to changes in the magnetic field strength and convert it into an electrical signal, thereby realizing rapid and accurate detection of the state of the switch 3 and improving the response speed and accuracy of the entire system.

[0023] Embodiment 2: Based on the Hall detection module 8 in Embodiment 1, this embodiment realizes the induction of magnetic field signals by building a matching peripheral circuit.

[0024] like Figure 4 As shown, the model of the Hall detection module 8 is U-SS443A, and the signal output mode is the collector open output mode. In terms of power connection, the positive pole of the power supply (VCC) is connected to pin 1 of the U-SS443A chip through a wire to provide the necessary power for the entire circuit; GND is the negative pole of the power supply, and GND is connected to pin 2 of the chip to ensure the stability and safety of the circuit. At the signal input end, Sta is responsible for receiving the external input signal. When the external signal is applied to Sta, the Hall sensor inside the Hall detection module 8 starts working. Pin 3 of the chip is marked as OUT, which is the signal output end. This pin adopts the collector open output mode, which can sense the magnetic field signal and convert it into an electrical signal output. It is connected to the external circuit through a wire. A resistor R1 is connected in series between the OUT pin and GND to limit the current and protect the circuit from the impact of excessive current. The Hall detection module 8 contains a Hall sensor and a resistor R1. The Hall sensor can sense changes in the external magnetic field and generate corresponding voltage signals based on these changes.

[0025] The Hall detection module 8 is connected to the control board 7 by a set of cables including 3 wires for power supply and signal transmission. The signal output mode of the Hall detection module 8 is an open collector output mode. In the open collector output mode, the collector of the output transistor is directly connected to the output end, and the emitter is grounded. When the output transistor is turned on, the output end is pulled down to the ground potential; when the output transistor is turned off, the output end is in a high impedance state, that is, it is not connected to any voltage source and presents a high impedance state. The high impedance state of the output end prevents unnecessary current from flowing, thereby protecting the circuit from damage.

[0026] The technical solutions in the above-mentioned embodiments of the present application have at least the following technical effects or advantages: the Hall detection module 8 adopts the Hall sensing principle and can perform detection without physical contact with the target object, thereby avoiding wear and failure caused by physical contact and improving the reliability and service life of the equipment. The signal output method of the module adopts the collector open output mode. This mode has the characteristics of outputting high impedance state, which can prevent unnecessary current flow and protect the circuit from damage. The Hall sensor can accurately sense changes in the external magnetic field and generate corresponding voltage signals based on these changes, thereby ensuring the sensitivity and accuracy of the detection. A resistor R1 is connected in series between the OUT pin and GND to limit the current and prevent excessive current from causing impact and damage to the circuit.

[0027] Embodiment 3: Based on the description of the structure of the electronic switch 3 and the principle of the Hall detection module 8 in Embodiment 1 and Embodiment 2, this embodiment calibrates the magnetic force of the magnetic base 4 and the suction plate 10.

[0028] like Figure 5 As shown, the method for calibrating the magnetic base 4 and the suction plate 10 is: S101, installing the magnetic base 4 and the suction plate 10 at designated positions on the standard test platform respectively; Specifically, the magnetic calibrator is connected to the connection ports of the magnetic base 4 and the suction plate 10 to ensure the stability and accuracy of data transmission, and the power of the magnetic calibrator is turned on to preheat to a stable working state.

[0029] S102, using a magnetic calibrator to measure the magnetic force of the magnetic base 4; Furthermore, according to the design specifications or calibration requirements of the magnetic base 4, determine the specific position of the magnetic measurement, which is the center point of the magnetic base 4. Use a marking tool (such as a marker or sticker) to clearly mark the position of the measuring point on the magnetic base 4 to ensure accurate alignment during the measurement process. Ensure that the magnetic calibrator is in good working condition and that its measurement range and accuracy can meet the calibration requirements of the magnetic base 4. According to the instruction manual of the magnetic calibrator, perform necessary preheating, calibration or setting operations to ensure the accuracy of the measurement results.

[0030] Place the magnetic base 4 on the standard test platform, make sure the measuring point is facing upward, adjust the position and height of the test platform so that the probe of the magnetic calibrator can accurately align with the measuring point, turn on the power of the magnetic calibrator, slowly move the probe close to the measuring point of the magnetic base 4 until the two are completely in contact or reach the measuring distance required by the calibrator, wait for the magnetic calibrator to stabilize, read and record the displayed magnetic data, the data includes the magnitude of the magnetic force (expressed in specific units, such as Gauss, Tesla, etc.) and direction (such as N pole, S pole or specific angle), in order to improve the accuracy of the measurement, perform multiple measurements under the same conditions, and calculate the average value of the magnetic force as the final result. Between each measurement, the magnetic base 4 can be slightly moved or the probe position can be adjusted to eliminate possible measurement errors. The magnitude and direction of the magnetic force measured each time and the environmental conditions during the measurement (such as temperature, humidity, etc.) are recorded in detail in the calibration record sheet.

[0031] S103, comparing the measured magnetic force with the initial data of the magnetic base 4, and adjusting the magnetic force of the magnetic base 4; Specifically, according to the comparison results between the initial data and the measured magnetic force, the magnetic force of the magnetic base 4 is adjusted using a magnetic calibrator. During the adjustment process, the magnetic force changes need to be closely monitored to ensure that the magnetic force gradually approaches and meets the design specifications. After the adjustment is completed, the magnetic force of the magnetic base 4 is measured again using the magnetic calibrator to verify the adjustment effect. If further adjustment is required, the above adjustment and verification process is repeated until the magnetic force of the magnetic base 4 is completely matched with the standard magnetic sample. The calibrated magnetic base 4 is subjected to an adsorption test on the suction plate 10 to ensure that the suction plate 10 can be stably adsorbed by the magnetic base 4. If the suction plate 10 has unstable adsorption or offset, the magnetic force or shape of the suction plate 10 needs to be adjusted accordingly until a stable adsorption state is reached.

[0032] S104, using an environmental simulation box to calibrate the magnetic base 4 and the suction plate 10; Specifically, an environmental simulation box is used to set different environmental conditions of high temperature, low temperature, and high humidity. Under each environmental condition, the calibration process from step S101 to step S102 is repeated to ensure that the magnetic base 4 and the suction plate 10 can remain stable under various conditions.

[0033] The technical solution in the above-mentioned embodiment of the present application has at least the following technical effects or advantages: the magnetic force of the calibrated magnetic base 4 and the suction plate 10 can remain stable under various environmental conditions, effectively avoiding the unstable adsorption or offset phenomenon caused by the change of magnetic force, and improving the stability and reliability of the non-contact electronic switch 3. The stable magnetic force ensures the rapid response and accurate action of the non-contact electronic switch 3 during the opening and closing process, thereby improving its overall performance and work efficiency.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A non-contact electronic switch, characterized in that: include: A housing (1), a switch (3) being fixedly mounted on the housing (1) via a small positioning pin (5), the height of one end of the switch (3) close to the small positioning pin (5) being greater than the other end of the switch (3), and a magnetic seat (4) being fixedly mounted on one side of the switch (3) close to the small positioning pin (5); The magnetic seat (4) is mounted on the housing (1) via a large positioning pin (2); A suction plate (10) and a magnet (9) are fixedly mounted on the switch (3) via a small positioning pin (5).

2. A non-contact electronic switch as claimed in claim 1, characterized in that: The suction plate (10) is made of iron material, and the magnetic seat (4) is used to adsorb the suction plate (10) made of iron material.

3. A non-contact electronic switch as claimed in claim 1, characterized in that: A mounting frame (6) is fixedly mounted in the housing (1), a Hall detection module (8) and a control board (7) are fixedly mounted on the mounting frame (6), and the Hall detection module (8) and the control board (7) are electrically connected via a wired cable.

4. A non-contact electronic switch as claimed in claim 3, characterized in that: The signal output mode of the Hall detection module (8) is an open collector output mode, the collector of the output transistor is connected to the output end, and the emitter is grounded. When the output transistor is turned on, the output end is in a low potential; when the output transistor is turned off, the output end is in a high impedance state, that is, it is not connected to any voltage source and presents a high impedance state.

5. A non-contact electronic switch as claimed in claim 4, characterized in that: The Hall detection module (8) comprises a Hall sensor and a resistor R1, wherein the resistor R1 is used to limit current, and the Hall sensor comprises pin 1, pin 2 and pin 3, wherein the pin 1 is connected to the positive electrode of the power supply via a wire, the pin 2 is grounded via a wire, and the pin 3 is a signal output terminal, which is used to sense a magnetic field signal and convert it into an electrical signal for output.

6. A non-contact electronic switch as claimed in claim 2, characterized in that: The method for calibrating the magnetic base (4) and the suction plate (10) is as follows: S101, installing the magnetic base (4) and the suction plate (10) on a standard test platform; S102, using a magnetic calibrator to measure the magnetic force of the magnetic base (4); S103, comparing the measured magnetic force with the initial data of the magnetic base (4), and adjusting the magnetic force of the magnetic base (4); S104, using an environmental simulation box, calibrating the magnetic base (4) and the suction plate (10).

7. A non-contact electronic switch as claimed in claim 6, characterized in that: According to the calibration requirements of the magnetic base (4), the center point of the magnetic base (4) is determined as the measurement position, and the position of the measurement point is marked on the magnetic base (4) using a marking tool. The magnetic base (4) is placed on a standard test platform with the measurement point facing upwards, and the position and height of the test platform are adjusted. The power of the magnetic calibrator is turned on, and the probe is brought close to the measurement point of the magnetic base (4) until the two are in full contact, and the displayed magnetic data is read and recorded.

8. A non-contact electronic switch as claimed in claim 7, characterized in that: The data include the magnitude and direction of the magnetic force, and the average value of the magnetic force is calculated as the final result.

9. A non-contact electronic switch as claimed in claim 8, characterized in that: The initial data is compared with the final result obtained by measurement, the magnetic force of the magnetic base (4) is adjusted using a magnetic calibrator, and the calibrated magnetic base (4) and the suction plate (10) are subjected to an adsorption test.

10. A non-contact electronic switch as claimed in claim 6, characterized in that: An environmental simulation box is used to set environmental conditions with different temperatures and humidities. Under each environmental condition, the calibration process from step S101 to step S102 is repeated to ensure that the magnetic base (4) and the suction plate (10) can remain stable under various conditions.

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