Non-contact electronic switch

Abstract

The utility model 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] This utility model relates to the field of electronic switch technology, and in particular to a non-contact electronic switch. Background Technology

[0002] As industrial assembly gains increasing importance among manufacturers, the application of power tools is becoming more widespread. With continuous technological advancements, user demands are constantly rising, including a focus on high-quality switches. Currently, 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 open and close circuits. This process inevitably generates friction and wear. Over time, the internal metal contacts of the switch gradually wear down due to frequent mechanical movements, leading to increased contact resistance and even poor contact. This physical wear not only affects the sensitivity and reliability of the switch but also significantly shortens the overall lifespan of the power tool, increasing maintenance and replacement costs. This is undoubtedly an inconvenience and economic burden for users. Mechanical switches experience wear and tear over time, and prolonged use can lead to switch failure or poor contact, thus drastically reducing the lifespan of the power tool.

[0003] Therefore, this utility model patent studies a non-contact electronic switch for power tools, which uses Hall effect sensing to replace physical contact, reducing wear, greatly increasing the service life of the switch, and improving reliability and performance. Summary of the Invention

[0004] This application provides a non-contact electronic switch that achieves non-contact operation through magnetic adsorption and Hall effect detection, avoiding wear and malfunctions caused by physical contact in traditional mechanical switches, and significantly improving the reliability and service life of the switch.

[0005] This application provides a non-contact electronic switch, including: a housing, a switch fixedly mounted on the housing by a small positioning pin, the height of one end of the switch near the small positioning pin being greater than the other end of the switch, and a magnetic base fixedly mounted on the side of the switch near the small positioning pin;

[0006] The magnetic base is mounted on the outer casing via a large locating pin;

[0007] The switch is fixedly mounted with a suction plate and a magnet by a small positioning pin.

[0008] Preferably, the suction plate is made of iron, and the magnetic base is used to attract the iron material suction plate.

[0009] Preferably, a mounting bracket is fixedly installed inside the housing, and a Hall effect detection module and a control board are fixedly installed on the mounting bracket. The Hall effect detection module and the control board are electrically connected via a wired cable.

[0010] Preferably, the Hall effect detection module outputs signals in an open-collector output mode, where the collector of the output transistor is connected to the output terminal and the emitter is grounded. When the output transistor is turned on, the output terminal is at a low potential; when the output transistor is turned off, the output terminal is in a high-impedance state, i.e., without any voltage source connected, it presents a high-impedance state.

[0011] Preferably, the Hall detection module includes a Hall sensor and a resistor R1. The resistor R1 is used to limit the current. The Hall sensor includes pin 1, pin 2 and pin 3. Pin 1 is connected to the positive terminal of the power supply through a wire. Pin 2 is grounded through a wire. Pin 3 is a signal output terminal used to sense magnetic field signals and convert them into electrical signals for output.

[0012] Preferably, the method for calibrating the magnetic base and the suction plate is as follows:

[0013] S101, mount the magnetic base and suction plate on a standard test platform;

[0014] S102, Use a magnetic calibrator to measure the magnetic force of the magnetic base;

[0015] S103, compare the measured magnetic force with the initial data of the magnetic base, and adjust the magnetic force of the magnetic base;

[0016] S104 uses an environmental simulation chamber to calibrate the magnetic base and suction plate.

[0017] Preferably, according to the calibration requirements of the magnetic base, the center point of the magnetic base is determined as the measurement position. The position of the measurement point is marked on the magnetic base using a marking tool. The magnetic base is placed on a standard test platform with the measurement point facing upwards. The position and height of the test platform are adjusted. The power of the magnetic calibrator is turned on. The probe is brought close to the measurement point of the magnetic base until the two are in complete contact. The displayed magnetic data is read and recorded.

[0018] 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.

[0019] Preferably, the initial data is compared with the final measurement result, the magnetic force of the magnetic seat is adjusted using a magnetic calibrator, and the calibrated magnetic seat is used to perform an adsorption test with the suction plate.

[0020] Preferably, an environmental simulation chamber is used to set different environmental conditions such as high temperature, low temperature and humidity. Under each environmental condition, the calibration process from step S101 to step S101 is repeated to ensure that the magnetic base and the suction plate can remain stable under various conditions.

[0021] One or more technical solutions provided in this 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, avoiding wear and failure caused by physical contact in traditional mechanical switches, significantly improving the reliability and service life of the switch; the switch body 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 in various harsh environments; the Hall detection module can quickly respond to changes in magnetic field strength and convert them into electrical signals, realizing rapid and accurate detection of the switch status, improving the response speed and accuracy of the entire system;

[0022] The Hall effect detection module uses the Hall effect sensing principle, which allows for detection without physical contact with the target object. This avoids wear and malfunctions caused by physical contact, improving the reliability and lifespan of the equipment. The module's signal output adopts an open collector output mode, which features a high impedance output state, preventing unnecessary current flow and protecting 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, thus 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 impacting and damaging the circuit.

[0023] After calibration, the magnetic base and suction plate maintain stable magnetic force under various environmental conditions, effectively avoiding unstable adsorption or displacement caused by changes in magnetic force. This improves the stability and reliability of the non-contact electronic switch. The stable magnetic force ensures the rapid response and accurate action of the non-contact electronic switch during the switching process, thus improving its overall performance and working efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a non-contact electronic switch according to the present invention;

[0025] Figure 2 This is a schematic diagram of the Hall detection module and control board according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the switch assembly according to an embodiment of the present utility model;

[0027] Figure 4 This is a schematic block diagram of the Hall detection module according to an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of the calibration process for the magnetic base and suction plate in an embodiment of this utility model.

[0029] In the diagram: 1. Housing; 2. Large locating pin; 3. Switch; 4. Magnetic base; 5. Small locating pin; 6. Mounting bracket; 7. Control board; 8. Hall effect detection module; 9. Magnet; 10. Suction plate. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more comprehensive description of this application will be given below with reference to the accompanying drawings.

[0031] Example 1: Figure 1 This is a schematic diagram of the structure of a non-contact electronic switch according to an embodiment of the present invention, including: a housing 1, a switch 3 fixedly mounted on the housing 1 by a small positioning pin 5, the height of one end of the switch 3 near the small positioning pin 5 being greater than the other end of the switch 3, making it easy to press and release the switch 3, a magnetic base 4 fixedly mounted on the side of the switch 3 near the small positioning pin 5, the magnetic base 4 being mounted on the housing 1 by a large positioning pin 2, a suction plate 10 and a magnet 9 fixedly mounted on the switch 3 by the small positioning pin 5, the suction plate 10 being made of iron, so that the suction plate 10 can be attracted by the magnetic base 4, and the switch 3 being made of nylon, a non-magnetic material that usually has good wear resistance, corrosion resistance and insulation properties, the nylon material of the switch 3 can ensure that the switch 3 is not interfered with by magnetic force when pressed, thereby ensuring the accuracy of opening and closing operations.

[0032] like Figure 2As shown, a mounting bracket 6 is fixedly installed inside the outer casing 1. A Hall effect detection module 8 and a control board 7 are fixedly installed on the mounting bracket 6. The Hall effect detection module 8 and the control board 7 are electrically connected via a wired cable to enable power supply and signal transmission. In the initial state, the magnetic base 4 attracts the suction plate 10 using magnetism, causing the magnet 9 to move away from the Hall effect detection module 8. The Hall effect 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, because the magnet 9 is far from the Hall effect detection module 8, the magnetic field strength detected by the Hall effect detection module 8 is weak, therefore it outputs a low-level signal. The level signal is then transmitted to the control board 7 via a wired cable. When switch 3 is pressed, switch 3 is made of non-magnetic materials such as nylon to ensure that it will not be affected by magnetic forces during the pressing process. The pressure applied by the finger on switch 3 gradually increases. When the applied pressure exceeds the attraction force of magnetic base 4 on suction plate 10, suction plate 10 will be pushed away, and magnet 9 will also move. As magnet 9 moves closer, the magnetic field environment of Hall detection module 8 changes, and the magnetic field strength detected by Hall detection module 8 increases. This change is captured by Hall detection module 8 and converted into a high-level signal, which is then transmitted to control board 7 again via wired cable.

[0033] like Figure 3As shown, the operation of switch 3 is divided into an initial state, pressing switch 3, and releasing switch 3. When the power tool is in an inactive state, i.e., when 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 attract the suction plate 10 to 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. Because a certain distance is maintained between the magnet 9 and the Hall detection module 8, the Hall detection module 8 cannot detect a sufficient magnetic field strength, so it outputs a low-level signal. This low-level signal 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, they press switch 3. This pressing action applies a downward force to overcome the attraction force of the magnetic base 4 on the suction plate 10 (and the magnet 9). As switch 3 is pressed, the suction plate 10 and the magnet 9 move downward together, gradually... When magnet 9 approaches the Hall effect sensor 8, it detects the change in magnetic field generated by magnet 9. This change triggers the Hall effect sensor 8 to change its output state from a low-level signal to a high-level signal. The high-level signal is also transmitted to the control board 7. Upon 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, and grinding. After the operation is completed, the user releases switch 3. At this time, the magnetism of the magnetic base 4 takes effect again, quickly pulling the suction plate 10 and magnet 9 back to their original position, that is, away from the Hall effect sensor 8. As magnet 9 moves away, the Hall effect sensor 8 can no longer detect sufficient magnetic field strength, so its output signal returns to a low-level state. The low-level signal is transmitted to the control board 7 again. Based on this, the control board 7 determines that the power tool has stopped being used 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.

[0034] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: non-contact operation of switch 3 is achieved through magnetic adsorption and Hall effect detection, avoiding wear and failure caused by physical contact in traditional mechanical switches 3, significantly improving the reliability and service life of switch 3. The main body of 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 switch 3 in various harsh environments. Hall detection module 8 can quickly respond to changes in magnetic field strength and convert them into electrical signals, realizing rapid and accurate detection of the state of switch 3, and improving the response speed and accuracy of the entire system.

[0035] Example 2: Based on the Hall detection module 8 in Example 1, this example realizes the sensing of magnetic field signals by building a matching peripheral circuit.

[0036] like Figure 4 As shown, the Hall sensor module 8 is model U-SS443A, and its signal output mode is open collector output mode. For power connection, the positive power supply (VCC) is connected to pin 1 of the U-SS443A chip via a wire, providing the necessary power to the entire circuit. GND serves as the negative power supply and is connected to pin 2 of the chip to ensure circuit stability and safety. At the signal input terminal, Sta is responsible for receiving external input signals. When an external signal is applied to Sta, the Hall sensor inside the Hall sensor module 8 starts working. Pin 3 of the chip is marked OUT, which is the signal output terminal. This pin adopts an open collector output mode, capable of sensing magnetic field signals and converting them into electrical signals for output. It is connected to the external circuit via a wire. A resistor R1 is connected in series between the OUT pin and GND to limit the current and protect the circuit from excessive current surges. The Hall sensor 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.

[0037] The Hall effect sensor module 8 is connected to the control board 7 via a cable consisting of three wires for power supply and signal transmission. The signal output mode of the Hall effect sensor module 8 is open collector output mode. In open collector output mode, the collector of the output transistor is directly connected to the output terminal, while the emitter is grounded. When the output transistor is turned on, the output terminal is pulled low to ground potential; when the output transistor is turned off, the output terminal is in a high impedance state, that is, without any voltage source connected, presenting a high impedance state. The high impedance state of the output terminal prevents unnecessary current flow, thereby protecting the circuit from damage.

[0038] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: The Hall detection module 8 adopts the Hall sensing principle, which can perform detection without physical contact with the target object, thereby avoiding wear and failure caused by physical contact, improving the reliability and service life of the equipment. The signal output mode of this module adopts the open collector output mode, which has the characteristics of high output impedance, 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 according to these changes, thereby ensuring the sensitivity and accuracy of detection. A resistor R1 is connected in series between the OUT pin and GND to limit the current and prevent excessive current from impacting and damaging the circuit.

[0039] Example 3: Based on the description of the structure of electronic switch 3 and the principle of Hall detection module 8 in Examples 1 and 2, this example calibrates the magnetic force of magnetic base 4 and suction plate 10.

[0040] like Figure 5 As shown, the method for calibrating the magnetic base 4 and the suction plate 10 is as follows:

[0041] S101, Install the magnetic base 4 and the suction plate 10 at the designated positions on the standard test platform;

[0042] Specifically, connect the magnetic calibrator to the connection ports of the magnetic base 4 and the suction plate 10 to ensure the stability and accuracy of data transmission. Turn on the power of the magnetic calibrator and preheat it to a stable working state.

[0043] S102, Use a magnetic calibrator to measure the magnetic force of the magnetic base 4;

[0044] Furthermore, based on the design specifications or calibration requirements of the magnetic base 4, determine the specific location for magnetic force measurement. This location 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 measurement 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 meet the calibration requirements of the magnetic base 4. According to the instruction manual of the magnetic calibrator, perform the necessary preheating, calibration, or setting operations to ensure the accuracy of the measurement results.

[0045] Place the magnetic base 4 on the standard test platform, ensuring the measurement point faces upwards. Adjust the position and height of the test platform so that the probe of the magnetic calibrator can accurately align with the measurement point. Turn on the power of the magnetic calibrator and slowly bring the probe closer to the measurement point of the magnetic base 4 until they are in complete contact or reach the measurement distance required by the calibrator. After the magnetic calibrator stabilizes, 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 a specific angle). 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 adjusted to eliminate possible measurement errors. Record the magnitude and direction of the magnetic force for each measurement, as well as the environmental conditions (such as temperature, humidity, etc.) during the measurement, in detail in the calibration record table.

[0046] S103, compare the measured magnetic force with the initial data of the magnetic base 4, and adjust the magnetic force of the magnetic base 4;

[0047] Specifically, based on the comparison results of 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 change in magnetic force needs 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 needed, 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 and the suction plate 10 are then subjected to an adsorption test to ensure that the suction plate 10 can be stably adsorbed by the magnetic base 4. If the suction plate 10 is unstable or shifts, the magnetic force or shape of the suction plate 10 needs to be adjusted accordingly until a stable adsorption state is achieved.

[0048] S104, using an environmental simulation chamber, calibrate the magnetic base 4 and the suction plate 10;

[0049] Specifically, using an environmental simulation chamber, different environmental conditions such as high temperature, low temperature, and high humidity are set. Under each environmental condition, the calibration process from step S101 to step S101 is repeated to ensure that the magnetic base 4 and the suction plate 10 can remain stable under various conditions.

[0050] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: the magnetic base 4 and the suction plate 10, after calibration, can maintain stable magnetic force under various environmental conditions, effectively avoiding unstable adsorption or displacement caused by changes in magnetic force, improving the stability and reliability of the non-contact electronic switch 3, and the stable magnetic force ensures the rapid response and accurate action of the non-contact electronic switch 3 during the opening and closing process, improving its overall performance and working efficiency.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, various modifications and variations are possible with this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A non-contact electronic switch, characterized in that, include: The outer casing (1) has a switch (3) fixedly installed on it by a small positioning pin (5). The height of the end of the switch (3) near the small positioning pin (5) is greater than that of the other end of the switch (3). A magnetic base (4) is fixedly installed on the side of the switch (3) near the small positioning pin (5). The magnetic base (4) is mounted on the outer casing (1) by a large positioning pin (2); The switch (3) is fixedly mounted with a suction plate (10) and a magnet (9) by a small positioning pin (5).

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

3. A non-contact electronic switch as described in claim 1, characterized in that, An installation bracket (6) is fixedly installed inside the outer casing (1). A Hall detection module (8) and a control board (7) are fixedly installed on the installation bracket (6). The Hall detection module (8) and the control board (7) are electrically connected by a wired cable.

4. A non-contact electronic switch as described in claim 3, characterized in that, The Hall detection module (8) outputs signals in an open collector output mode. The collector of the output transistor is connected to the output terminal, and the emitter is grounded. When the output transistor is turned on, the output terminal is at a low potential. When the output transistor is turned off, the output terminal 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 described in claim 4, characterized in that, The Hall detection module (8) includes a Hall sensor and a resistor R1. The resistor R1 is used to limit the current. The Hall sensor includes pin 1, pin 2 and pin 3. Pin 1 is connected to the positive terminal of the power supply through a wire. Pin 2 is grounded through a wire. Pin 3 is a signal output terminal used to sense magnetic field signals and convert them into electrical signals for output.

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