Aiming light protection circuit, aiming light protection system and medical equipment

Abstract

The utility model relates to the technical field of laser medical treatment, in particular to an aiming light protection circuit, an aiming light protection system and medical equipment, in the aiming light protection circuit, starting or stopping signals are transmitted to a laser through a signal socket, one end of a current-limiting resistor is connected with a first pin of the signal socket, and the other end of the current-limiting resistor is connected with a second pin of the signal socket; the current-limiting resistor is arranged in the circuit, so that the current in the circuit is prevented from exceeding the maximum working current of the laser in the signal transmission process between the signal socket and the laser, the laser is prevented from being damaged due to overlarge current, meanwhile, the electrostatic discharge protection unit is further arranged, one end of the electrostatic discharge protection unit is grounded, and the other end of the electrostatic discharge protection unit is grounded. When the laser is influenced by discharge, the electrostatic discharge protection unit can release current to the ground, and the problem of electrostatic damage risk caused by frequent contact in the installation process of the laser is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of laser medical treatment, in particular to an aiming light protection circuit, an aiming light protection system and medical equipment. Background Art

[0002] With the development of science and technology, lasers are applied to various fields, such as industry and medicine. When lasers are applied to the medical field, they are usually in the form of laser treatment equipment. An aiming light emission system is generally installed on the laser treatment equipment to guide or locate the position of the working laser. At the same time, in order to facilitate the observation of the aiming light, the wavelength range of the aiming light is usually selected within the visible light wavelength range (380-780nm). Usually, due to the small size and optical fiber of the fiber-coupled laser, it is usually selected as the laser treatment equipment and equipped with an aiming light emission system. The laser enters the medical optical fiber with a smaller diameter through the optical fiber beam combiner, so that the laser finally reaches the affected area to be treated.

[0003] However, existing laser treatment equipment and aiming light emission systems are frequently in contact during installation, and there is a risk that the fiber-coupled laser will be easily affected by discharge and subsequently damaged. Utility Model Content

[0004] The embodiments of the present utility model provide an aiming light protection circuit, an aiming light protection system and a medical device to solve the technical problem that a laser is easily affected by discharge and then damaged.

[0005] The embodiment of the utility model provides an aiming light protection circuit, comprising: a signal socket, a current limiting resistor and an electrostatic discharge protection unit;

[0006] One end of the current limiting resistor is connected to the first pin of the signal socket, and the other end of the current limiting resistor is connected to the laser. One end of the electrostatic discharge protection unit is grounded, and the other end is connected to the laser and the signal socket.

[0007] Preferably, the electrostatic discharge protection unit includes a first diode, a second diode and a third diode;

[0008] Wherein, one end of the first diode is grounded, and the other end is connected to the connection line between the first pin and the current limiting resistor;

[0009] One end of the second diode is grounded, and the other end is connected to the laser and the third pin of the signal socket;

[0010] One end of the third diode is grounded, and the other end is connected to the laser and the fifth pin of the signal socket.

[0011] Preferably, the first diode, the second diode and the third diode are all bidirectional transient suppression diodes.

[0012] Preferably, the circuit further comprises a filter capacitor; wherein one end of the filter capacitor is connected to the connecting line between the laser and the current limiting resistor, and the other end is grounded.

[0013] Preferably, the signal socket further includes a second pin, a fourth pin and a sixth pin, wherein the second pin, the fourth pin and the sixth pin are all grounded.

[0014] The beneficial effect of a protection circuit provided by an embodiment of the present utility model is that: in the aiming light protection circuit, a signal for starting or stopping the laser is transmitted through the signal socket, and one end of a current limiting resistor is connected to the first pin of the signal socket, and the other end is connected to the laser. By setting a current limiting resistor in the circuit, the current in the circuit is prevented from exceeding the maximum operating current of the laser during the process of signal transmission between the signal socket and the laser, thereby preventing the laser from being damaged by excessive current. At the same time, an electrostatic release protection unit is also provided, one end of which is grounded and the other end is connected to the laser and the signal socket. When the laser is affected by discharge, the electrostatic release protection unit will release current to the ground, thereby avoiding the risk of electrostatic damage to the laser due to frequent contact during installation.

[0015] The utility model also provides an aiming light protection system, comprising: a control module, a laser and the aiming light protection circuit; wherein the input end of the aiming light protection circuit is connected to the control module, and the output end is connected to the laser.

[0016] Preferably, the laser is a 520nm fiber-coupled laser.

[0017] The beneficial effects of an aiming light protection system provided by an embodiment of the present utility model are: the control module is connected to the input end of the aiming light protection circuit, the laser is connected to the output end of the aiming light protection circuit, the control module transmits the working signal to the laser through the aiming light protection circuit, and controls the laser to work or stop. At the same time, when the laser is affected by discharge, the aiming light protection circuit will introduce current into the ground to avoid damage to the laser. For details, please refer to the beneficial effects of the above-mentioned aiming light protection circuit and will not be repeated here.

[0018] The utility model also provides a medical device, comprising a device frame and the aiming light protection system; wherein the aiming light protection system is arranged on the device frame.

[0019] Preferably, it further comprises a bakelite substrate; wherein the bakelite substrate is arranged between the aiming light protection system and the equipment rack.

[0020] Preferably, it further comprises a fixing device, wherein the fixing device is used to fix the aiming light protection system and the bakelite base plate on the equipment rack.

[0021] The beneficial effect of a medical device provided by an embodiment of the present invention is that the aiming light protection system is installed on the equipment rack, so that the medical device can maintain a small size and be easy to use. At the same time, when the medical device encounters a discharge situation, it will release the current to the ground, thereby avoiding damage to the medical device. For details, please refer to the beneficial effects of the above-mentioned aiming light protection circuit and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of an aiming light protection circuit provided by an embodiment of the present utility model.

[0024] Figure 2 This is a schematic diagram of an aiming light protection system provided by an embodiment of the present utility model.

[0025] Figure 3 The present invention is a cross-sectional schematic diagram of a medical device provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1-Signal socket; 2-Laser; 3-Electrostatic discharge protection unit; 4-Aiming light protection circuit board; 5-Equipment rack; 6-Output optical fiber; 7-Bakelite substrate; 8-Fixture device. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] The present invention will be further described in detail below through specific implementation examples and in conjunction with the accompanying drawings.

[0030] The embodiment of the utility model provides an aiming light protection circuit, comprising: a signal socket, a current limiting resistor and an electrostatic discharge protection unit;

[0031] One end of the current limiting resistor is connected to the first pin of the signal socket, and the other end of the current limiting resistor is connected to the laser. One end of the electrostatic discharge protection unit is grounded, and the other end is connected to the laser and the signal socket.

[0032] In the above-mentioned aiming light protection circuit, the signal for starting or stopping the laser is transmitted through the signal socket. One end of the current limiting resistor is connected to the first pin of the signal socket, and the other end is connected to the laser. By setting the current limiting resistor in the circuit, the current in the circuit is prevented from exceeding the maximum operating current of the laser during the transmission of the model between the signal socket and the laser, thereby preventing the laser from being damaged by excessive current. At the same time, an electrostatic discharge protection unit is also provided, one end of which is grounded and the other end is connected to the laser and the signal socket. When the laser is affected by discharge, the electrostatic discharge protection unit will release current to the ground, thereby avoiding the risk of electrostatic damage to the laser due to frequent contact during installation.

[0033] For example, Figure 1 As shown, the aiming light protection circuit includes: a signal socket 1, a current limiting resistor R1 and an electrostatic release protection unit 3; wherein, one end of the current limiting resistor R1 (i.e., the left end) is connected to the first pin (i.e., pin 1) of the signal socket 1, and the other end of the current limiting resistor R1 (i.e., the right end) is connected to the laser 2, and one end of the electrostatic release protection unit 3 is grounded, and the other end is connected to the laser 2 and the signal socket 1.

[0034] In the embodiment of the present utility model, Figure 1 As shown, the electrostatic discharge protection unit 3 includes a first diode Z1, a second diode Z2 and a third diode Z3; wherein, one end (i.e., the lower end) of the first diode Z1 is grounded, and the other end (i.e., the upper end) is connected to the connecting line between the first pin (i.e., pin 1) of the signal socket 1 and the current limiting resistor R1; one end (i.e., the lower end) of the second diode Z2 is grounded, and the other end (i.e., the upper end) is connected to the connecting line between the laser 2 and the third pin (i.e., pin 3) of the signal socket 1; one end (i.e., the lower end) of the third diode Z3 is grounded, and the other end (i.e., the upper end) is connected to the connecting line between the laser 2 and the fifth pin (i.e., pin 5) of the signal socket 1.

[0035] Specifically, when the laser 2 generates a spike current or a voltage spike value reaching a predetermined breakdown voltage between the laser 2 and the first pin (i.e., pin 1) of the signal socket 1 due to external interference, the first diode Z1 breaks down and releases current; when the laser 2 generates a spike current or a voltage spike value reaching a predetermined breakdown voltage between the laser 2 and the third pin (i.e., pin 3) of the signal socket 1 due to external interference, the second diode Z2 breaks down and releases current; when the laser 2 generates a spike current or a voltage spike value reaching a predetermined breakdown voltage between the laser 2 and the fifth pin (i.e., pin 5) of the signal socket 1 due to external interference, the third diode Z3 breaks down and releases current.

[0036] Therefore, when the laser 2 generates a peak current or a voltage peak value reaching a predetermined breakdown voltage due to discharge from an electrostatic object, the electrostatic discharge protection unit 3 releases the current to the ground to prevent the laser 2 from being damaged.

[0037] In addition, the laser 2 includes a laser diode (Laser Diode, LD) and a photodiode (Photo Diode, PD), such as Figure 1 As shown, the anode of the laser diode (i.e., LD+) and the cathode of the photodiode (i.e., PD-) serve as the first end (i.e., pin 1) of the laser 2; the cathode of the laser diode (i.e., LD-) serves as the second end (i.e., pin 2) of the laser 2; the anode of the photodiode (i.e., PD+) serves as the third end (i.e., pin 3) of the laser 2; further, one end (i.e., the lower end) of the first diode Z1 is grounded, and the other end (i.e., the upper end) is connected to the connecting line between the first pin (i.e., pin 1) of the signal socket 1 and the current limiting resistor R1, wherein the right end of the current limiting resistor R1 is connected to the first end (i.e., pin 1) of the laser 2; one end (i.e., the lower end) of the second diode Z2 is grounded, and the other end (i.e., the upper end) is connected to the second end (i.e., pin 2) of the laser 2 and the third pin (i.e., pin 3) of the signal socket 1; one end (i.e., the lower end) of the third diode Z3 is grounded, and the other end (i.e., the upper end) is connected to the third end (i.e., pin 3) of the laser 2 and the fifth pin (i.e., pin 5) of the signal socket 1.

[0038] Specifically, when the anode (i.e., LD+) of the laser diode in the laser 2 and the cathode (i.e., PD-) of the photodiode generate a spike current or a voltage spike value between the first end (i.e., pin 1) of the laser 2 and the first pin (i.e., pin 1) of the signal socket 1 due to external interference, and the spike current reaches a predetermined breakdown voltage, the first diode Z1 breaks down and releases current; when the cathode (i.e., LD-) of the laser diode in the laser 2 generates a spike current or a voltage spike value between the second end (i.e., pin 2) of the laser 2 and the third pin (i.e., pin 3) of the signal socket 1 due to external interference, and the spike current reaches a predetermined breakdown voltage, the second diode Z2 breaks down and releases current; when the anode (i.e., PD+) of the photodiode in the laser 2 generates a spike current or a voltage spike value between the third end (i.e., pin 3) of the laser 2 and the fifth pin (i.e., pin 5) of the signal socket 1 due to external interference, and the spike current reaches a predetermined breakdown voltage, the third diode Z3 breaks down and releases current.

[0039] In the embodiment of the present invention, the first diode Z1 , the second diode Z2 and the third diode Z3 are preferably bidirectional transient suppression diodes.

[0040] Specifically, when the laser 2 is not affected by the discharge, that is, when it is working normally, the bidirectional transient suppression diode exhibits a capacitive reactance characteristic with an extremely low capacitance value (generally <5pf), which will not affect the characteristics of the laser 2, and will not affect the signal and data transmission between the signal socket 1 and the laser 2; when the laser 2 is affected by the discharge and the voltage at both ends reaches a predetermined breakdown voltage, the bidirectional transient suppression diode responds quickly (generally in nanoseconds) and releases the inter-electrode leakage current in geometric series, thereby absorbing and reducing the interference and influence of the discharge of electrostatic objects on the laser 2.

[0041] In the embodiment of the present utility model, Figure 1 As shown, the aiming light protection circuit also includes a filter capacitor C1; wherein, one end of the filter capacitor C1 is connected to the connecting line between the first end of the laser 2 (i.e., pin 1) and the current limiting resistor R1, and the other end is grounded. In practical applications, the filter capacitor C1 is provided to receive the redundant signal of LD+ / PD+ in the circuit to filter the circuit signal and avoid coupling interference.

[0042] Furthermore, in the embodiment of the present invention, if Figure 1As shown, the signal socket 1 further includes a second pin (i.e., pin 2), a fourth pin (i.e., pin 4), and a sixth pin (i.e., pin 6), wherein the second pin (i.e., pin 2), the fourth pin (i.e., pin 4), and the sixth pin (i.e., pin 6) are all grounded. It should be noted that the signal socket 1 is provided with the second pin (i.e., pin 2), the fourth pin (i.e., pin 4), and the sixth pin (i.e., pin 6) as spare pins to prevent pins from being unavailable due to damage, thereby improving circuit flexibility.

[0043] The present invention also provides an aiming light protection system in an embodiment. Figure 2 As shown, the aiming light protection system includes: a control module (not shown), a laser 2 and the above-mentioned aiming light protection circuit; wherein, the aiming light protection circuit is integrated into an aiming light protection circuit board 4, and the input end of the aiming light protection circuit is connected to the control module; a laser 2 is provided on the right side of the aiming light protection circuit board 4, and the output end of the aiming light protection circuit is connected to the laser 2.

[0044] For example, the control module of the aiming light protection system is preferably a main control board MCU, and the aiming light protection system also includes a human-computer interaction module and a constant current drive module, wherein the human-computer interaction module, the main control board MCU and the constant current drive module are Figure 2 Not shown in the figure, when it is necessary to turn on or off the aiming indicator light of the medical optical fiber port (i.e., the laser emitted by the laser diode of laser 2), the human-computer interaction module is first used to select to turn on or off the laser emitted by laser 2, and the main control board MCU sends a command signal to control the constant current drive module so that the signal socket 1 supplies current to the laser diode of laser 2 or stops supplying current, thereby realizing the control of turning on and off the aiming indicator light of the medical optical fiber port.

[0045] In the embodiment of the present invention, the laser 2 is preferably a 520nm fiber-coupled laser, which is often used in the medical field. Specifically, the laser emitted by the 520nm fiber-coupled laser is visible light, which is convenient for observation. At the same time, the 520nm fiber-coupled laser has its own optical fiber and is small in size. The laser can be combined with the optical fiber to allow the laser to enter a medical optical fiber with a smaller diameter and finally reach the affected area to be treated.

[0046] It should be noted that the above-mentioned laser 2 may also be other fiber-coupled lasers, which can be specifically set according to actual conditions. Other fiber-coupled lasers can refer to 520nm fiber-coupled lasers, and the embodiments of the present invention will not be described in detail here.

[0047] The present invention also provides a medical device in an embodiment, such as Figure 3As shown, the medical equipment includes an equipment rack 5 and the above-mentioned aiming light protection system; wherein, the aiming light protection system is arranged on the equipment rack 5, specifically, the signal socket 1 and the laser 2 are both arranged on the aiming light protection circuit board 4 to form the aiming light protection system, and the laser 2 is provided with an output optical fiber 6 for welding into the medical optical fiber.

[0048] In the embodiment of the present utility model, Figure 3 As shown, it also includes a bakelite substrate 7; wherein the bakelite substrate 7 is arranged between the aiming light protection system and the equipment rack 5. Specifically, the installation substrate of the aiming light protection system uses bakelite material, which has good electrical insulation properties and can avoid the problem of damage to medical equipment due to excessive electrical clearance during the testing of medical-grade electromagnetic compatibility (EMC) and safety standards.

[0049] In the embodiment of the present utility model, Figure 3 As shown, a fixing device 8 is also included; wherein the fixing device 8 is used to fix the aiming light protection system and the bakelite base plate 7 to the equipment frame 5. Preferably, the fixing device 8 can be fixed with screws.

[0050] For example, Figure 3 As shown, the bakelite base plate 7 is first fixed to the equipment frame 5 by screws, and then the aiming light protection system is fixed to the bakelite base plate 7 by screws, wherein the laser 2 in the aiming light protection system is also fixed to the bakelite base plate 7 by screws.

[0051] In summary, the medical device provided by the embodiment of the present invention is provided with a bakelite substrate 7, which avoids the problem of too small electrical gaps in the medical device, so that the medical device can pass the tests of medical-grade EMC and safety standards, and the medical device is provided with an aiming light protection system, which includes an aiming light protection circuit. By setting a current limiting resistor R1, the current in the circuit is prevented from exceeding the maximum operating current of the laser 2, thereby preventing the laser 2 from being damaged due to excessive current; the aiming light protection circuit is provided with a filter capacitor C1, which is used to filter the circuit signal, absorb excess signals in the circuit, and prevent coupling interference; the aiming light protection circuit is also provided with an electrostatic release protection unit 3. When the laser 2 is affected by the discharge of an electrostatic object, the electrostatic release protection unit 3 will release current to the ground to avoid damage to the laser 2.

[0052] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0053] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the term "mounted" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sighting light protection circuit, characterized in that: include: Signal socket, current limiting resistor and electrostatic discharge protection unit; One end of the current limiting resistor is connected to the first pin of the signal socket, and the other end of the current limiting resistor is connected to the laser. One end of the electrostatic discharge protection unit is grounded, and the other end is connected to the laser and the signal socket.

2. The aiming light protection circuit according to claim 1, characterized in that: The electrostatic discharge protection unit includes a first diode, a second diode and a third diode; Wherein, one end of the first diode is grounded, and the other end is connected to the connection line between the first pin and the current limiting resistor; One end of the second diode is grounded, and the other end is connected to the laser and the third pin of the signal socket; One end of the third diode is grounded, and the other end is connected to the laser and the fifth pin of the signal socket.

3. The aiming light protection circuit according to claim 2, characterized in that: The first diode, the second diode and the third diode are all bidirectional transient suppression diodes.

4. The aiming light protection circuit according to claim 1, characterized in that: The circuit further includes a filter capacitor; One end of the filter capacitor is connected to the connecting line between the laser and the current limiting resistor, and the other end is grounded.

5. The aiming light protection circuit according to claim 1, characterized in that: The signal socket further includes a second pin, a fourth pin and a sixth pin, wherein the second pin, the fourth pin and the sixth pin are all grounded.

6. An aiming light protection system, characterized in that: The system includes: a control module, a laser, and the aiming light protection circuit according to any one of claims 1 to 5; wherein the input end of the aiming light protection circuit is connected to the control module, and the output end is connected to the laser.

7. The aiming light protection system according to claim 6, characterized in that: The laser is a 520nm fiber-coupled laser.

8. A medical device, characterized in that It comprises an equipment rack and the aiming light protection system according to any one of claims 6 to 7; wherein the aiming light protection system is arranged on the equipment rack.

9. The medical device according to claim 8, characterized in that It also includes a bakelite substrate; wherein the bakelite substrate is arranged between the aiming light protection system and the equipment rack.

10. The medical device according to claim 9, characterized in that It also includes a fixing device, wherein the fixing device is used to fix the aiming light protection system and the bakelite base plate on the equipment rack.

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