Limiting protection device, laser focusing device and treatment equipment

Abstract

The utility model discloses a limiting protection device, a laser focusing device and treatment equipment, and relates to the technical field of detection protection. The laser focusing device comprises a main control circuit, a driving circuit, a motor and a moving part. The main control circuit is used for controlling the driving circuit to drive the motor to drive the moving part to move in a preset area, and the limiting protection device comprises a limiting detection assembly used for outputting a detection signal through the output end of the limiting detection assembly when it is detected that the moving part moves to the boundary of the preset area; the limiting protection circuit is electrically connected with the output end of the limiting detection assembly, and the output end of the limiting protection circuit is connected with the enabling end of the driving circuit; and the limiting protection circuit is used for outputting a shutdown signal to the enabling end of the driving circuit under the condition that the detection signal is received, so that the driving circuit stops working. The utility model aims to improve the safety when the motor drives the moving part to move.

Description

Technical Field

[0001] The utility model relates to the technical field of detection and protection, in particular to a position limiting protection device, a laser focusing device and treatment equipment. Background Art

[0002] For devices that use stepper motors for lateral translation, existing technologies typically only control the stepper motors to move the structure they drive within a preset range. However, this control method lacks hardware protection and relies entirely on the MCU's control of the stepper motor. When the MCU outputs an abnormal control signal, the structure driven by the stepper motor loses control, potentially causing it to move beyond the preset range, resulting in damage to the structure or components. It can also cause the stepper motor to become damaged due to stalling. Utility Model Content

[0003] The main purpose of the utility model is to provide a position limiting protection device, which aims to improve the safety when a moving part is driven by a motor to move.

[0004] To achieve the above-mentioned purpose, the position limiting protection device proposed in the present invention is applied to a laser focusing device, wherein the laser focusing device includes a main control circuit, a drive circuit, a motor, and a moving part; the main control circuit is used to control the drive circuit to drive the motor to drive the moving part to move within a preset area, and the position limiting protection device includes:

[0005] a limit detection component, configured to output a detection signal via its own output terminal when detecting that the moving member has moved to a boundary of the preset area;

[0006] A limit protection circuit, wherein the limit protection circuit is electrically connected to the output end of the limit detection component, and the output end of the limit protection circuit is connected to the enable end of the drive circuit; the limit protection circuit is used to output a shutdown signal to the enable end of the drive circuit when receiving the detection signal, so as to stop the drive circuit from working.

[0007] In one embodiment, the preset area includes a first boundary and a second boundary; the moving member moves between the first boundary and the second boundary; and the limit detection component includes:

[0008] a first position limit detection module, the first position limit detection module being disposed at the first boundary and configured to output a first detection signal via its output end when detecting that the moving member has moved to the first boundary;

[0009] The second limit detection module is arranged at the second boundary and is used to output a second detection signal through its own output end when detecting that the moving part moves to the second boundary.

[0010] In one embodiment, the first limit detection module and the second limit detection module are limit detection switches.

[0011] In one embodiment, the position limiting protection circuit includes:

[0012] a logic control circuit, wherein input ends of the logic control circuit are electrically connected to the first limit detection module and the second limit detection module respectively;

[0013] an enable control circuit, wherein an input terminal of the enable control circuit is electrically connected to an output terminal circuit of the logic control, and an output terminal of the enable control circuit is electrically connected to an enable terminal of the drive circuit;

[0014] The logic control circuit is configured to control the enable control circuit to output the shutdown signal to the enable terminal of the drive circuit when receiving the first detection signal or the second detection signal.

[0015] In one embodiment, the logic control circuit includes:

[0016] a first logic control circuit, wherein a first input end of the first logic control circuit is electrically connected to an output end of the first limit detection module, and a second input end of the first logic control circuit is electrically connected to an output end of the second limit detection module, and is configured to output the first logic signal when receiving the first detection signal or the second detection signal;

[0017] a second logic control circuit, wherein a first input terminal of the second logic control circuit is electrically connected to an output terminal of the first logic control circuit, and an output terminal of the second logic control circuit is electrically connected to the enable control circuit; the second logic control circuit is configured to control the enable control circuit to output a shutdown signal when a first signal is input to the second input terminal and the first input terminal receives the first logic signal;

[0018] The second logic control circuit is further configured to control the enable control circuit to output a start signal when the second input terminal receives a second signal and the first input terminal receives a first logic signal, so as to enable the drive circuit to start working.

[0019] In one embodiment, the second input terminal of the second logic control circuit is electrically connected to the main control circuit.

[0020] In one embodiment, the main control circuit is electrically connected to the output end of the limit detection component, and is configured to receive the detection signal and output a first signal.

[0021] In one embodiment, the first logic control circuit includes a first resistor, a second resistor, a third resistor, a first diode, a second diode, and a power supply terminal; the second logic control circuit includes an OR gate circuit and a power supply terminal;

[0022] Among them, the first ends of the first resistor, the second resistor, and the third resistor are electrically connected to the power supply end; the second end of the first resistor is electrically connected to the cathode of the first diode and the output end of the first limit detection module; the second end of the second resistor is electrically connected to the cathode of the second diode and the output end of the second limit detection module; the anode of the first diode is electrically connected to the second end of the third resistor, the anode of the second diode, and the first input end of the OR gate circuit; the second input end of the OR gate circuit is electrically connected to the main control circuit, the power input end of the OR gate circuit is electrically connected to the power supply end, the ground end of the OR gate circuit is grounded, and the output end of the OR gate circuit is electrically connected to the enable control circuit.

[0023] In one embodiment, the enabling control circuit includes a fourth resistor, a fifth resistor, a sixth resistor, a switch tube, a capacitor, and a power supply terminal;

[0024] Among them, the first end of the capacitor is electrically connected to the ground end, the second end of the capacitor is electrically connected to the power supply end and the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the main control circuit and the first end of the switch tube; the first end of the fifth resistor is electrically connected to the output end of the logic control circuit, the second end of the fifth resistor is electrically connected to the controlled end of the switch tube and the first end of the sixth resistor; the second end of the sixth resistor is electrically connected to the second end of the switch tube and the ground end.

[0025] The present invention further provides a laser focusing device, characterized in that the laser focusing device comprises a main control circuit, a drive circuit, a motor, a moving part and a position limiting protection device as described in any one of the above items.

[0026] In one embodiment, the motor is a stepping motor, and the moving member includes a screw rod and a sliding member slidably arranged on the screw rod;

[0027] Wherein, a focusing lens is fixedly arranged on the sliding member.

[0028] The present invention provides a treatment device, characterized in that the treatment device comprises the laser focusing device as described in any one of the above items.

[0029] The technical solution of the present utility model adopts a limit protection device. Among them, the limit protection device includes a limit detection component and a limit protection circuit, so as to detect whether the moving part moves to the boundary of the preset area, and outputs a detection signal to the limit protection circuit through its own output end. The limit protection circuit is directly electrically connected to the enable end of the drive circuit. After receiving the detection signal output by the limit detection component, it outputs a stop signal to the drive circuit, so that the drive circuit directly stops driving the motor after receiving the stop signal, thereby avoiding the movement range of the moving part driven by the motor exceeding the preset area. It can be understood that this method also avoids the confirmation of whether the moving part moves to the boundary of the preset area by the control circuit. Compared with the software program control, the present application directly controls the drive circuit to stop driving the motor when the moving part contacts the boundary of the preset area, further improving the safety and reliability of the laser focusing device during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the module of the limit protection device of the utility model;

[0032] Figure 2 This is a schematic structural diagram of the laser focusing device of the present utility model;

[0033] Figure 3 This is a schematic diagram of a module of an embodiment of the position limiting protection device of the present utility model;

[0034] Figure 4 This is a schematic diagram of a module of an embodiment of the position limiting protection device of the present utility model;

[0035] Figure 5 This is a circuit diagram of an embodiment of the limit protection device of the utility model;

[0036] Figure 6 This is a circuit diagram of an embodiment of the laser focusing device of the utility model.

[0037] Description of Figure Numbers:

[0038] 10. Limit detection component; 11. First limit detection module; 12. Second limit detection module; 20. Limit protection circuit; 21. Logic control circuit; 22. Enable control circuit; R1-R6: first resistor - sixth resistor; C, capacitor; D1-D2, first diode - second diode; Q1, switch tube; U1A: OR gate circuit.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0043] For devices that use stepper motors for lateral translation, existing technologies typically only control the stepper motors to move the structure they drive within a preset range. However, this control method lacks hardware protection and relies entirely on the MCU's control of the stepper motor. When the MCU outputs an abnormal control signal, the structure driven by the stepper motor loses control, potentially causing it to move beyond the preset range, resulting in damage to the structure or components. It can also cause the stepper motor to become damaged due to stalling.

[0044] Therefore, reference Figure 1 and Figure 2The present invention provides a position limiting protection device applied to a laser focusing device, wherein the laser focusing device includes a main control circuit, a drive circuit, a motor, and a moving part; the main control circuit is used to control the drive circuit to drive the motor to drive the moving part to move within a preset area, and the position limiting protection device includes:

[0045] The limit detection component 10 is used to output a detection signal through its own output terminal when detecting that the moving member moves to the boundary of the preset area;

[0046] The limit protection circuit 20 is electrically connected to the output end of the limit detection component 10, and the output end of the limit protection circuit 20 is connected to the enable end of the drive circuit; the limit protection circuit 20 is used to output a shutdown signal to the enable end of the drive circuit when receiving the detection signal, so as to stop the drive circuit from working.

[0047] It is understandable that in a laser focusing device, the operation of the motor is usually controlled by a main control circuit, and the motor drives the moving part to move within a preset area. For example, the moving part is realized by a lead screw and a sliding part arranged on the lead screw. The motor drives the sliding part to move within a preset area through the threaded structure of the lead screw by controlling the lead screw. Among them, the laser focusing device realizes the movement of the mirror within a preset area by arranging the mirror on the sliding part, thereby realizing the adjustment of the light reflected by the mirror. For example, by controlling the movement of the mirror within the preset area, the focusing process of the laser focusing device is realized. Therefore, when the control circuit outputs an erroneous control signal to the drive circuit, the drive circuit will also drive the motor to make an erroneous action, thereby causing the movement of the moving part to exceed the preset area, resulting in contact with and squeezing other structures or devices.

[0048] In this embodiment, the position limit detection assembly 10 can be implemented using a position limit detection switch, a photoelectric detection assembly, an image detection assembly, or the like. Specifically, the position limit detection assembly 10 only needs to detect the boundaries of a preset area and does not need to perform full-range detection within the preset area, thus reducing the detection burden on the position limit detection assembly 10. The preset area can be set based on, for example, the focal length to be adjusted by a laser focusing device, and the position limit detection assembly 10 is accordingly configured. For example, if the position limit detection assembly 10 is a photoelectric detection assembly, two sets of photoelectric detection modules are positioned at the first and second boundaries of the preset area, respectively. If the moving element moves beyond the first or second boundary due to abnormal control by the main control circuit, the light source in the photoelectric detection module is blocked by the sliding element, preventing the receiver from receiving the light signal at the moment of the blockage. This situation is also processed by the circuit, which outputs a corresponding signal to the enable terminal of the drive circuit, thereby stopping the drive circuit and, in turn, the motor, preventing the sliding element from continuing to move in that direction.

[0049] In this embodiment, the position limit protection circuit 20 can be implemented by adopting a logic control circuit 21, a switch control circuit, etc. The position limit protection circuit 20 is directly electrically connected to the output end of the position limit detection component 10, thereby quickly obtaining the detection signal output by it, and confirming whether the sliding member has moved to the boundary of the preset area through the detection signal. It can be understood that the detection signal output by the position limit detection component 10 may include two different detection signals, thereby indicating the two states detected by it, namely, the sliding member has moved to the boundary of the preset area and has not moved to the boundary of the preset area. Specifically, the position limit detection component 10 can output a high-level signal and a low-level signal to respectively indicate the two states. The position limit protection circuit 20 confirms whether the sliding member has moved to the boundary of the preset area by receiving two different detection signals. In addition, the detection signal output by the position limit detection component 10 can also be only one, that is, the detection signal is output when the sliding member is detected to have moved to the boundary of the preset area, and the detection signal is not output when the sliding member is not detected to have moved to the boundary of the preset area. The limit protection circuit 20 receives the detection signal and triggers the control, directly outputting a stop signal to the enable terminal of the drive circuit to stop the drive circuit, thereby stopping the motor and quickly stopping the movement of the sliding member.

[0050] By adopting the limit detection component 10 to detect whether the moving part has moved to the boundary of the preset area, and outputting the detection signal to the limit protection circuit 20 through its own output terminal. The limit protection circuit 20 is directly electrically connected to the enable terminal of the drive circuit, and after receiving the detection signal output by the limit detection component 10, it outputs a stop signal to the drive circuit, so that the drive circuit directly stops driving the motor after receiving the stop signal, thereby avoiding the movement range of the moving part driven by the motor exceeding the preset area. It is understandable that this method also avoids the confirmation of whether the moving part has moved to the boundary of the preset area by the control circuit. Compared with the software program control, the present application directly controls the drive circuit to stop driving the motor when the moving part contacts the boundary of the preset area, further improving the safety and reliability of the laser focusing device during operation.

[0051] refer to Figure 2 and Figure 3 In one embodiment of the present invention, the preset area includes a first boundary and a second boundary; the moving member moves between the first boundary and the second boundary; the limit detection component 10 includes:

[0052] A first position limit detection module 11, which is disposed at the first boundary and is configured to output a first detection signal via its output terminal when detecting that the moving member has moved to the first boundary;

[0053] The second position limit detection module 12 is disposed at the second boundary, and is configured to output a second detection signal via its output end when detecting that the moving member has moved to the second boundary.

[0054] In this embodiment, the main control circuit is configured to control the motor to drive the moving member to move between a first boundary and a second boundary of a predetermined area. The first boundary and the second boundary can be located on the same straight line in the same plane or on different planes, depending on the structure of the moving member. For example, if a lead screw and a sliding member are used, the movement occurs on the same straight line in the same plane. The first limit detection module 11 and the second limit detection module 12 can be the same module or different modules, but corresponding micro-protection circuits must be configured to accurately identify the detection signals output by them. For example, the first limit detection module 11 is a limit detection switch, and the second limit detection module 12 is a photoelectric detection module. To simplify the limit protection circuit 20 and ensure its recognition and confirmation of the detection signal, both the first limit detection module 11 and the second limit detection module 12 are implemented using limit detection switches. It is understood that the limit detection switches need to be physically triggered to achieve detection. Therefore, the first limit detection module 11 and the second limit detection module 12 must be respectively located at the first boundary and the second boundary of the predetermined area. Specifically, when the moving part moves to the first boundary of the preset area, the first limit detection module 11 will be triggered, thereby outputting a first detection signal through its own output terminal. When the limit protection circuit 20 receives the first detection signal, it confirms that the moving part has moved to the boundary of the preset area, and then outputs a shutdown signal to the enable terminal of the drive circuit, thereby achieving a technical effect of quickly stopping the moving part from continuing to move. Similarly, when the moving part moves to the second boundary of the preset area, the second limit detection module 12 will be triggered, thereby outputting a second detection signal through its own output terminal.

[0055] refer to Figure 3 In one embodiment of the present invention, the position limiting protection circuit 20 includes:

[0056] a logic control circuit 21, wherein input terminals of the logic control circuit 21 are electrically connected to the first limit detection module 11 and the second limit detection module 12 respectively;

[0057] an enable control circuit 22, wherein an input terminal of the enable control circuit 22 is electrically connected to an output terminal circuit of the logic control, and an output terminal of the enable control circuit 22 is electrically connected to an enable terminal of the drive circuit;

[0058] The logic control circuit 21 is configured to control the enable control circuit 22 to output the shutdown signal to the enable terminal of the drive circuit when receiving the first detection signal or the second detection signal.

[0059] In this embodiment, the logic control circuit 21 can be implemented by using an AND gate circuit, an OR gate circuit, and a NOT gate circuit. The input end of the logic control circuit 21 is electrically connected to the first limit detection module 11 and the second limit detection module 12 respectively, so as to obtain the first detection signal output by the first limit detection module 11 and the second detection signal output by the second limit detection module 12. By receiving the first detection signal or the second detection signal, the logic control circuit 21 can output the corresponding logic signal to the enable control circuit 22. It can be understood that the logic control circuit 21 processes binary signals, which are usually expressed as logic "0" and logic "1". In electronic circuits, these logical states correspond to two different voltage levels, namely high level and low level. Therefore, the input signal and output signal of the logic control circuit 21 are both high-low level signals, and the first detection signal and the second detection signal also need to use high-low level signals. Among them, the first detection signal and the second detection signal can be represented by low level signals or high level signals according to the specific circuit selection.

[0060] In this embodiment, the enable control circuit 22 can be implemented using a switch control circuit or a signal processing circuit. By receiving the high and low level signals output by the logic control circuit 21, circuit changes are achieved, and a shutdown signal is output to the enable terminal of the drive circuit to stop the drive circuit. It will be understood that the enable control circuit 22 is implemented entirely using hardware circuits, without the need for software algorithms. Therefore, upon receiving the high and low level signals output by the logic control circuit 21, the enable control circuit 22 can quickly output a shutdown signal to the enable terminal of the drive circuit.

[0061] In one embodiment of the present invention, the logic control circuit 21 includes:

[0062] a first logic control circuit, wherein a first input end of the first logic control circuit is electrically connected to an output end of the first limit detection module 11, and a second input end of the first logic control circuit is electrically connected to an output end of the second limit detection module 12, and is configured to output the first logic signal when receiving the first detection signal or the second detection signal;

[0063] a second logic control circuit, wherein a first input terminal of the second logic control circuit is electrically connected to an output terminal of the first logic control circuit, and an output terminal of the second logic control circuit is electrically connected to the enable control circuit 22; the second logic control circuit is configured to control the enable control circuit 22 to output a shutdown signal when a first signal is input to the second input terminal and the first input terminal receives the first logic signal;

[0064] The second logic control circuit is further configured to control the enable control circuit 22 to output a start signal when the second input terminal receives a second signal and the first input terminal receives a first logic signal, so as to enable the drive circuit to start working.

[0065] It should be noted that upon receiving the shutdown signal from the limit protection circuit 20, the driver circuit's enable terminal will stop operating. The driver circuit cannot automatically resume operation and must still receive the corresponding control signal from its enable terminal to restart. Furthermore, after the driver circuit stops operating, the main control circuit will detect the operating status and restart the corresponding driver program to properly control the driver circuit again.

[0066] In this embodiment, the first logic control circuit can be implemented by an AND gate circuit, a NOT gate circuit, or an OR gate circuit. The input end of the first logic control circuit is electrically connected to the first limit detection module 11 and the second limit detection module 12 respectively, thereby obtaining the first detection signal and the second detection signal, and performing logic processing on the first detection signal and the second detection signal, thereby outputting the first logic signal. The second logic control circuit obtains the first logic signal and the first signal output by the first logic control circuit, thereby outputting the second logic signal to the enable control circuit 22, so that the enable control circuit 22 outputs a shutdown signal to the enable end of the drive circuit. In addition, the second logic control circuit can also obtain the second signal and perform logic processing on the first logic signal and the second signal, thereby changing the second logic signal outputted by it, thereby causing the enable control circuit 22 to output a start signal to the enable end of the drive circuit, so that the drive circuit starts working. Among them, the first signal and the second signal inputted by the second input end of the second logic control circuit can be outputted by the main control circuit, or the input of the second input end signal of the second logic control circuit can be changed by a user trigger.

[0067] Optionally, the second input terminal of the second logic control circuit is electrically connected to the main control circuit.

[0068] By electrically connecting the second input end of the second logic control circuit to the main control circuit, the second logic circuit obtains the first signal and the second signal from the output end of the main control circuit, thereby realizing the autonomous restart working process.

[0069] Optionally, the main control circuit is electrically connected to the output end of the limit detection component 10, and is configured to receive the detection signal and output a first signal.

[0070] It is understandable that the main control circuit can confirm that the drive circuit stops working, but after being unable to confirm the restart program, what kind of control signal should be output to the drive circuit so that the drive circuit drive motor drives the mobile part to move in the opposite direction, and calibrates the distance that the mobile part has previously moved. Therefore, the main control circuit also needs to be electrically connected to the output terminal of the limit detection component 10, that is, electrically connected to the output terminal of the first limit detection module 11 and the output terminal of the second limit detection module 12 respectively, so as to obtain the first detection signal and the second detection signal. The main control circuit confirms whether the mobile part is located at the first boundary or the second boundary of the preset area by receiving the first detection signal and the second detection signal, thereby outputting the corresponding control signal when restarting the program, so that the mobile part moves in the opposite direction and calibrates the distance of the previous erroneous movement.

[0071] refer to Figure 5 In one embodiment of the present utility model, the first logic control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1, a second diode D2, and a power supply terminal; the second logic control circuit includes an OR gate circuit U1A and a power supply terminal;

[0072] Among them, the first ends of the first resistor R1, the second resistor R2, and the third resistor R3 are electrically connected to the power supply end; the second end of the first resistor R1 is electrically connected to the cathode of the first diode D1 and the output end of the first limit detection module 11; the second end of the second resistor R2 is electrically connected to the cathode of the second diode D2 and the output end of the second limit detection module 12; the anode of the first diode D1 is electrically connected to the second end of the third resistor R3, the anode of the second diode D2, and the first input end of the OR gate circuit U1A; the second input end of the OR gate circuit is electrically connected to the main control circuit, the power input end of the OR gate circuit U1A is electrically connected to the power supply end, the ground end of the OR gate circuit U1A is grounded, and the output end of the OR gate circuit U1A is electrically connected to the enable control circuit 22.

[0073] It should be noted that in this embodiment, the power supply terminals in the first logic control circuit include a first power supply terminal VCC and a second power supply terminal VCC2; the power supply terminal in the second logic control circuit is a third power supply terminal VCC3. The first power supply terminal VCC is used to pull up the cathodes of the first and second diodes, ensuring that the received detection signal is a high-level signal (i.e., a logic 1) when the movable element moves within a predetermined area. The second power supply terminal VCC2, together with the first and second diodes, forms an "AND gate circuit" to confirm the input detection signal and control the output of the corresponding logic signal. The third power supply terminal VCC3 is used to power the OR gate circuit, ensuring that the OR gate circuit outputs the corresponding logic signal when the receiving end receives the signal. Furthermore, the first power supply terminal VCC, the second power supply terminal VCC2 in the first logic control circuit, and the third power supply terminal VCC3 in the second logic control circuit can be output terminals of the same power supply or output terminals of different power supplies, depending on actual needs. Furthermore, in this embodiment, the input voltages of the first power supply terminal VCC, the second power supply terminal VCC2, and the third power supply terminal VCC3 are all 3.3V DC.

[0074] Optionally, the cathodes of the first diode D1 and the second diode D2 are also connected to the interface J1. The other end of the interface J1 is electrically connected to the first limit detection module 11 and the second limit detection module 12 to enable the first logic control circuit to receive the detection signal. Furthermore, the interface J1 also includes a ground terminal. For example, the first output terminal of the interface J1 is electrically connected to the cathode of the first diode D1, the second output terminal and the second output terminal of the interface J1 are grounded, the fourth output terminal of the interface J1 is electrically connected to the cathode of the second diode D2, and the termination terminal EP of the interface J1 is grounded.

[0075] In the present embodiment, the first detection signal and the second detection signal output by the first limit detection module 11 and the second limit detection module 12 are both low-level signals, i.e., logic 0. When the moving part moves within the preset area, the detection signals output by the first limit detection module 11 and the second limit detection module 12 are both pulled up to high-level signals by the first resistor R1, the second resistor R2 and the power supply end, i.e., logic 1. After the detection signals output by the first limit detection module 11 and the second limit detection module 12 pass through the first diode D1 and the second diode D2, the detection signals of the two are ANDed and output to the OR gate circuit U1A. Therefore, when any one of the first limit detection module 11 and the second limit detection module 12 detects the moving part, the first logic signal output by the first logic control circuit is both a low-level signal, i.e., logic 0. When neither the first limit detection module 11 nor the second limit detection module 12 detects the moving part, the first logic signal output by the first logic control circuit is both a high-level signal, i.e., logic 1. Furthermore, when the main control circuit is in a normal state, the signal output to the second input end of the OR gate circuit U1A is a low-level signal (i.e., the first signal), i.e., logic 0. It is understandable that when the main control circuit is in a normal state, when any one of the first limit detection module 11 and the second limit detection module 12 detects a moving part, the signal input to the first input end of the second logic control circuit is logic 0, and the signal input to the second input end is also logic 0, thereby deriving the output end as a low-level signal, i.e., logic 0. When the main control circuit is in a restart state, the signal output to the second input end of the OR gate circuit U1A is a high-level signal (i.e., the second signal), i.e., logic 1. At this point, the signal input to the first input end of the second logic circuit is still logic 0, while the signal input to the second input end is logic 1, thereby deriving the output end as a high-level signal, i.e., logic 1. By outputting the second signal (logic 1) through the main control circuit, the logic signal output by the second logic control circuit can be changed, thereby enabling the control circuit 22 to output a start signal to the drive circuit to resume operation of the drive circuit.

[0076] Furthermore, the enabling control circuit 22 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a switch tube Q1, a capacitor C, and a power supply terminal;

[0077] Among them, the first end of the capacitor C is electrically connected to the ground end, the second end of the capacitor C is electrically connected to the power supply end and the first end of the fourth resistor R4; the second end of the fourth resistor R4 is electrically connected to the main control circuit and the first end of the switch tube Q1; the first end of the fifth resistor R5 is electrically connected to the output end of the logic control circuit 21, the second end of the fifth resistor R5 is electrically connected to the controlled end of the switch tube Q1 and the first end of the sixth resistor R6; the second end of the sixth resistor R6 is electrically connected to the second end of the switch tube Q1 and the ground end.

[0078] In this embodiment, the enable control circuit 22 controls the input signal of the enable terminal of the drive circuit by using a switch circuit, a power supply terminal, and a ground terminal. The switch tube Q1 can be implemented by an NMOS transistor, an NPN transistor, or the like. Its controlled terminal is electrically connected to the output terminal of the second logic control circuit, thereby turning the switch tube Q1 on and off. In combination with the power supply terminal and the ground terminal, the input signal output to the enable terminal of the drive circuit is changed. Specifically, when the switch tube Q1 receives a high-level signal output by the second logic control circuit, the switch tube Q1 is turned on, and the input signal of the enable terminal of the drive circuit is pulled low, i.e., a low-level signal, i.e., a start signal. When the switch tube Q1 receives a low-level signal output by the second logic control circuit, the switch tube Q1 is turned off, and the input signal of the enable terminal of the drive circuit is pulled high, i.e., a high-level signal, i.e., a shutdown signal. The power supply terminal in the enable control circuit 22 can be the same as the third power supply terminal VCC3 described above, or an additional power supply terminal can be provided to assist in switching between the shutdown signal and the start signal. For details, please refer to Table 1 below:

[0079] Table 1

[0080]

[0081] The present invention also provides a laser focusing device, comprising a main control circuit, a drive circuit, a motor, a moving part, and any of the aforementioned position limiting protection devices. It is worth noting that, because the present invention's laser focusing device is based on the aforementioned position limiting protection device, the embodiments of the present invention include all technical solutions of all the aforementioned position limiting protection device embodiments, and the technical effects achieved are identical, and therefore will not be further elaborated here.

[0082] refer to Figure 6 In one embodiment of the present invention, the motor is a stepping motor, and the moving member includes a screw rod and a sliding member slidably arranged on the screw rod;

[0083] Wherein, a focusing lens is fixedly arranged on the sliding member.

[0084] In this embodiment, the motor adopts a stepper motor to ensure the accuracy of the movement of the moving part. Among them, the transmission shaft of the stepper motor is directly connected to one end of the screw rod, or is indirectly connected to the screw rod through a coupling or other transmission device (such as a pulley or gear). A matching nut can be set on the screw rod, and this nut needs to be set on the sliding part that needs to be moved. When the stepper motor drives the screw rod to rotate one circle, the sliding part connected to the screw rod will move along the length direction of the screw rod by a screw rod thread pitch, thereby driving the focusing lens fixed on the sliding part to move. By controlling the rotation angle of the stepper motor, the moving distance of the focusing lens along the length direction of the screw rod can be accurately and indirectly controlled. By limiting the motion range of the sliding part, the focusing range of the focusing lens is effectively ensured, so as to avoid the focusing lens being damaged and displaced due to contact with other structures.

[0085] The present invention also provides a therapeutic device comprising any of the aforementioned laser focusing devices. It is noteworthy that, because the present therapeutic device is based on the aforementioned laser focusing device, the embodiments of the present therapeutic device include all technical solutions of all the aforementioned embodiments of the laser focusing device, and the technical effects achieved are identical, and therefore will not be further elaborated here.

[0086] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A position limiting protection device, applied to a laser focusing device, comprising a main control circuit, a drive circuit, a motor, and a moving part; the main control circuit is used to control the drive circuit to drive the motor to drive the moving part to move within a preset area, characterized in that: The position limiting protection device comprises: a limit detection component, configured to output a detection signal via its own output terminal when detecting that the moving member has moved to a boundary of the preset area; A limit protection circuit, wherein the limit protection circuit is electrically connected to the output end of the limit detection component, and the output end of the limit protection circuit is connected to the enable end of the drive circuit; the limit protection circuit is used to output a shutdown signal to the enable end of the drive circuit when receiving the detection signal, so as to stop the drive circuit from working.

2. The position limiting protection device according to claim 1, characterized in that: The preset area includes a first boundary and a second boundary; the moving member moves between the first boundary and the second boundary; the limit detection component includes: a first position limit detection module, the first position limit detection module being disposed at the first boundary and configured to output a first detection signal via its output end when detecting that the moving member has moved to the first boundary; The second limit detection module is arranged at the second boundary and is used to output a second detection signal through its own output end when detecting that the moving part moves to the second boundary.

3. The position limiting protection device according to claim 2, characterized in that: The first limit detection module and the second limit detection module are limit detection switches.

4. The position limiting protection device according to claim 2, characterized in that: The limit protection circuit includes: a logic control circuit, wherein input ends of the logic control circuit are electrically connected to the first limit detection module and the second limit detection module respectively; an enable control circuit, wherein an input terminal of the enable control circuit is electrically connected to an output terminal circuit of the logic control, and an output terminal of the enable control circuit is electrically connected to an enable terminal of the drive circuit; The logic control circuit is configured to control the enable control circuit to output the shutdown signal to the enable terminal of the drive circuit when receiving the first detection signal or the second detection signal.

5. The position limiting protection device according to claim 4, characterized in that: The logic control circuit includes: a first logic control circuit, wherein a first input end of the first logic control circuit is electrically connected to an output end of the first limit detection module, and a second input end of the first logic control circuit is electrically connected to an output end of the second limit detection module, and is configured to output a first logic signal when receiving the first detection signal or the second detection signal; a second logic control circuit, wherein a first input terminal of the second logic control circuit is electrically connected to an output terminal of the first logic control circuit, and an output terminal of the second logic control circuit is electrically connected to the enable control circuit; the second logic control circuit is configured to control the enable control circuit to output a shutdown signal when a first signal is input to the second input terminal and the first input terminal receives the first logic signal; The second logic control circuit is further configured to control the enable control circuit to output a start signal when the second input terminal receives a second signal and the first input terminal receives a first logic signal, so as to enable the drive circuit to start working.

6. The position limiting protection device according to claim 5, characterized in that: The second input end of the second logic control circuit is electrically connected to the main control circuit.

7. The position limiting protection device according to claim 6, characterized in that: The main control circuit is electrically connected to the output end of the limit detection component, and is used to receive the detection signal and output a first signal.

8. The position limiting protection device according to claim 6, characterized in that: The first logic control circuit includes a first resistor, a second resistor, a third resistor, a first diode, a second diode, and a power supply terminal; the second logic control circuit includes an OR gate circuit and a power supply terminal; Among them, the first ends of the first resistor, the second resistor, and the third resistor are electrically connected to the power supply end; the second end of the first resistor is electrically connected to the cathode of the first diode and the output end of the first limit detection module; the second end of the second resistor is electrically connected to the cathode of the second diode and the output end of the second limit detection module; the anode of the first diode is electrically connected to the second end of the third resistor, the anode of the second diode, and the first input end of the OR gate circuit; the second input end of the OR gate circuit is electrically connected to the main control circuit, the power input end of the OR gate circuit is electrically connected to the power supply end, the ground end of the OR gate circuit is grounded, and the output end of the OR gate circuit is electrically connected to the enable control circuit.

9. The position limiting protection device according to claim 4, characterized in that: The enabling control circuit includes a fourth resistor, a fifth resistor, a sixth resistor, a switch tube, a capacitor, and a power supply terminal; Among them, the first end of the capacitor is electrically connected to the ground end, the second end of the capacitor is electrically connected to the power supply end and the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the main control circuit and the first end of the switch tube; the first end of the fifth resistor is electrically connected to the output end of the logic control circuit, the second end of the fifth resistor is electrically connected to the controlled end of the switch tube and the first end of the sixth resistor; the second end of the sixth resistor is electrically connected to the second end of the switch tube and the ground end.

10. A laser focusing device, characterized in that: The laser focusing device includes a main control circuit, a drive circuit, a motor, a moving part, and the position limiting protection device according to any one of claims 1 to 9.

11. The laser focusing device according to claim 10, wherein: The motor is a stepping motor, and the moving part includes a screw rod and a sliding part slidably arranged on the screw rod; Wherein, a focusing lens is fixedly arranged on the sliding member.

12. A therapeutic device, characterized in that The treatment equipment comprises the laser focusing device according to any one of claims 10 to 11.

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