Normally open type laser shutter mechanism, laser system and shutter control method

Abstract

The invention relates to the field of laser shutters, in particular to a normally open type laser shutter mechanism, a laser system and a shutter control method. A shutter bracket is arranged in an inner cavity of a shutter shell main body; the middle of the shutter blocking piece is rotationally connected with the shutter bracket through a first hinge shaft, the first end of the shutter blocking piece corresponds to the light through hole, and a long-strip-shaped groove is formed in the second end of the shutter blocking piece. One end of the elastic body is connected with the shutter bracket, and the other end is connected with the first end of the shutter baffle; the electromagnetic push rod comprises an electromagnet arranged in a matched mode and an electromagnet push rod arranged in an inner channel of the electromagnet, and the electromagnet push rod is connected with the long-strip-shaped groove in the shutter blocking piece through a second hinge shaft; the travel switch is arranged on the shutter bracket; the control module is electrically connected with the electromagnet; when the electromagnet is powered off, the shutter blocking piece is located at the opening position to open the light through hole. When the electromagnet is powered on, the shutter blocking piece is located at the closing position and closes the light through hole. The problems that a normally-closed shutter is high in energy consumption and delayed in starting can be solved.

Description

Technical Field

[0001] This invention relates to the field of laser shutters, and more specifically, to a normally open laser shutter mechanism, a laser system, and a shutter control method. Background Technology

[0002] In laser processing and optoelectronic communication, the laser shutter is a crucial component of a laser system, primarily used to control the switching of the laser beam. Existing laser shutter mechanisms mostly employ mechanical or electric drives. Common electric shutter systems typically rely on motors or electromagnets to open and close the light-blocking plates or shutter blades. Electromagnet-driven shutter systems are widely used in many laser systems due to their fast response speed and simple control.

[0003] Current electromagnet-driven shutter mechanisms employ a normally closed strategy. Under energized conditions, the electromagnet drives a light-blocking plate or shutter blades to move, thus enabling light transmission. While these designs offer a degree of stability and reliability, existing technologies still have some shortcomings: Electromagnets may overheat under high-frequency, long-term operation, affecting their performance, efficiency, and lifespan. Advanced electromagnet-driven shutter mechanisms employ strategies to reduce current and thus heat generation; however, the electromagnet's attraction force is directly proportional to the current, which may result in insufficient attraction, preventing the light-blocking plate from moving properly. Furthermore, traditional normally closed shutters may experience control delays during system startup or recovery, failing to immediately initiate laser output and reducing system response speed. Summary of the Invention

[0004] The purpose of this invention is to provide a normally open laser shutter mechanism, which aims to solve the problems of high energy consumption and start-up delay in the normally closed shutter in the prior art.

[0005] Another objective of this invention is to provide a laser system and a shutter control method, which aim to solve the problems of high energy consumption and start-up delay in normally closed shutters in the prior art.

[0006] The technical solution of this invention is implemented as follows: A normally open laser shutter mechanism includes a shutter housing body with a light-transmitting hole, and further includes: A shutter bracket is disposed in the inner cavity of the shutter housing body; A shutter stop, the middle part of which is rotatably connected to the shutter bracket via a first hinge shaft, and the two ends of the shutter stop are a first end and a second end, the first end being correspondingly provided with the light-transmitting hole, and the second end having an elongated groove; An elastomer, one end of which is connected to the shutter bracket and the other end of which is connected to the first end of the shutter stop; An electromagnetic push rod includes a matching electromagnet and an electromagnetic push rod disposed in the internal channel of the electromagnet. The electromagnet is fixed on the shutter bracket. When the electromagnet is energized, the electromagnetic push rod can move axially along the internal channel of the electromagnet. The electromagnetic push rod is connected to the elongated groove on the shutter stop through a second hinge shaft. A limit switch, mounted on the shutter bracket, is used to detect the opening and closing state of the shutter stop. A control module, electrically connected to the electromagnet, is used to control the energization or de-energization of the electromagnet. When the electromagnet is de-energized, the shutter stop is in the open position, opening the light-transmitting hole; when the electromagnet is energized, the shutter stop is in the closed position, closing the light-transmitting hole.

[0007] Furthermore, limit pins are respectively provided on the first end of the shutter stop and the shutter bracket, and are respectively used to connect the two ends of the elastic body.

[0008] Furthermore, the elastic body is a tension spring, and the tension spring is a helical tension spring, with its two ends hooked onto the limiting pins provided on the shutter bracket and the shutter stop, respectively.

[0009] Furthermore, the second hinge shaft is a spring pin, and the elongated groove is an oblong groove; The electromagnet push rod is inserted into the waist-shaped groove of the shutter stop through the spring pin. When the electromagnet push rod moves axially, the spring pin slides in the waist-shaped groove, thereby driving the shutter stop to rotate around the hinge pin and realize the closing of the shutter.

[0010] Furthermore, there are two limit switches, which are respectively installed on the shutter bracket and located on both sides of the shutter stop, for detecting the open and closed position of the shutter stop and feeding back the status signal to the control module.

[0011] Furthermore, the first hinge shaft is a hinge pin, and the shutter stop has a pin hole in the middle for installing the hinge pin.

[0012] Furthermore, the shutter stop has a Z-shaped structure, including a first rod portion, a turning portion, and a second rod portion connected in sequence. The first rod portion is located at the first end, and the second rod portion is located at the second end. The elongated hole is formed on the second rod portion.

[0013] Furthermore, the control module adopts PWM waveform control, which controls the heating power of the electromagnet by adjusting the duty cycle of the current, thereby maintaining the electromagnet in a stable operating temperature range.

[0014] Furthermore, the shutter bracket is provided with multiple first threaded holes and fixed to the inside of the shutter housing body by multiple screws. The shutter bracket is provided with a mounting part for mounting the electromagnetic push rod. The mounting part has a second threaded hole. The electromagnet is installed in the second threaded hole and connected by threads, and is fixed to the shutter bracket by a clamping structure. The shutter stop plate restricts the degree of rotation freedom by a hinge pin.

[0015] A laser system including the normally open laser shutter mechanism described above.

[0016] A shutter control method, applied to the laser system, includes the following steps: When the system is not powered on, the electromagnet push rod is in the extended state, and the elastic body pulls the first end of the shutter stop away from the light hole to keep the light hole open. The shutter stop is in the open position, and the light hole is in the normally open state. After the system is powered on, the control module activates the electromagnet. The electromagnet push rod retracts and drives the second hinge shaft to move in the long slot of the shutter stop, thereby driving the shutter stop to rotate and overcome the tension of the elastic body. This causes the first end of the shutter stop to block the light-transmitting hole and close the light-transmitting hole, and the shutter stop is in the closed position. The control module uses PWM waveform to control the on / off frequency and duty cycle of the electromagnet in order to maintain the operating temperature of the electromagnet. The limit switch detects the movement state of the shutter stop and feeds the status information back to the control module; After the system is powered off, the elastomer returns to its original state, and the shutter stop automatically resets to the open position, so that the light hole is open and in a normally open state.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This application provides a normally open laser shutter mechanism. When the electromagnet is de-energized, the first end of the shutter stop moves away from the light-transmitting hole, leaving the light-transmitting hole open. When the electromagnet is energized, it attracts the electromagnet push rod, causing the push rod to retract, which in turn drives the shutter stop to rotate around the first hinge axis, thus blocking the light-transmitting hole at the first end of the shutter stop. Therefore, this shutter mechanism is a "normally open" design, meaning that the shutter is open by default when power is off (it can transmit light without energy), and closes only when power is applied.

[0018] The advantages of this design are: Energy saving: Power is only supplied when it needs to be turned off; Fast response: The laser can be output immediately when the laser is started, without waiting; Safer: The laser will not shut down unexpectedly in the event of a power outage, making it suitable for applications requiring continuous light transmission. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the normally open laser shutter mechanism of the present invention; Figure 2 This is a schematic diagram of the shutter mechanism electromagnet of the present invention when it is energized; Figure 3 This is an isometric view of the components on the actual shutter bracket of the present invention; Figure 4 This is an isometric view of the components inside the shutter housing of the present invention; Figure 5 This is a schematic diagram of the shutter mechanism electromagnet of the present invention when it is de-energized.

[0021] In the picture: 1-Shutter housing body; 2-Electromagnetic push rod; 3-Limit switch; 4-Limit pin; 5-Elastic body; 6-Shutter stop plate; 7-Hinge pin; 8-Electromagnetic push rod; 9-Shutter bracket; 901-Mounting part; 10-Cable connector; 11-Spring pin; 12-First threaded hole; 13-Locking bolt; 14-Horizontal sliding groove; 15-Light-passing hole; 16-Oval groove; 17-Connecting screw. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] Example 1 Reference Figures 1-5 This embodiment provides a normally open laser shutter mechanism, including a shutter housing body 1, with a light-transmitting hole 15 provided on the shutter housing body 1, and further including: The shutter bracket 9 is located inside the shutter housing body 1; The shutter stop 6 is rotatably connected to the shutter bracket 9 through the first hinge shaft in the middle. The two ends of the shutter stop 6 are the first end and the second end, respectively. The first end is set to correspond to the light hole 15, and the second end is provided with a long groove. The elastic body 5 has one end connected to the shutter bracket 9 and the other end connected to the first end of the shutter stop 6. It is used to pull the shutter stop 6 away from the light hole 15 to keep the shutter open when the electromagnet is de-energized. The electromagnetic push rod 2 includes a matching electromagnet and an electromagnetic push rod 8 disposed in the internal channel of the electromagnet. The electromagnet is fixed on the shutter bracket 9. When the electromagnet is energized, the electromagnetic push rod 8 can move axially along the internal channel of the electromagnet. The electromagnetic push rod 8 is connected to the elongated groove on the shutter baffle 6 through the second hinge shaft. Limit switch 3 is mounted on shutter bracket 9 and is used to detect the opening and closing status of shutter stop 6; The control module, electrically connected to the electromagnet, is used to control the on / off state of the electromagnet and to adjust the operating temperature of the electromagnet using a PWM waveform control strategy. When the electromagnet is de-energized, the shutter stop 6 is in the open position, opening the light-transmitting hole 15; when the electromagnet is energized, the shutter stop 6 is in the closed position, closing the light-transmitting hole 15.

[0030] It should be noted that the electromagnetic actuator 2 is existing technology and typically consists of the following parts: The outer cylinder has an overall circular shape; An electromagnet is installed inside the outer cylinder. An electromagnet push rod 8 (i.e., iron core) is movably installed in the center of the electromagnet. The electromagnet push rod 8 is connected to the inner bottom of the outer cylinder through a return spring. A copper sleeve is fixed to the inner bottom of the outer cylinder and fitted onto the iron core. The coil is wound around a copper sleeve, which serves to guide the movement of the iron core.

[0031] When the electromagnet is de-energized: When the electromagnet is de-energized, there is no current in the coil, the magnetic field disappears, and the elastic force of the return spring keeps the electromagnet push rod 8 (iron core) in the extended state.

[0032] When the electromagnet is energized: When the electromagnet is energized, current flows through the coil, generating a magnetic field. The magnetic field generates an attractive force and attracts the electromagnet push rod 8, causing the electromagnet push rod 8 to retract. At the same time, the attractive force overcomes the elastic force of the return spring and attracts the push rod to the center of the coil, causing it to retract.

[0033] Limit pins 4 are respectively provided on the first end of the shutter stop 6 and the shutter bracket 9, and are used to connect the two ends of the elastic body 5.

[0034] The elastic body 5 is a tension spring, and the tension spring is a helical tension spring. Both ends of the tension spring have round hooks, which are hooked onto the limiting pins 4 set on the shutter bracket 9 and the shutter stop 6, respectively.

[0035] The second hinge shaft uses a spring pin 11, the long slot uses an oblong slot 16, the end of the electromagnet push rod 8 is horizontally provided with a transverse sliding slot 14, and the electromagnet push rod 8 has a spring pin 11 hole that passes through the transverse sliding slot 14. The second end of the shutter stop 6 is located in the transverse sliding slot 14, and the spring pin 11 passes through the spring pin 11 hole and the oblong slot 16 of the shutter stop 6. When the electromagnet push rod 8 moves axially, it drives the spring pin 11 to slide in the oblong slot 16, and the second end of the shutter stop 6 moves in the transverse sliding slot 14, thereby driving the shutter stop 6 to rotate around the hinge pin 7, so as to realize the closing of the shutter.

[0036] Two limit switches 3 are electrically connected to the control module and are respectively mounted on the shutter bracket 9 on both sides of the shutter stop 6. They are used to detect the open / closed position of the shutter stop 6 to obtain its motion data and feed back the status signal and motion data to the control module. The control module uses a control board. The limit switches 3 are fixed to the shutter bracket 9 by connecting screws 17. Their function is that when the shutter stop 6 moves, one limit switch 3 presses down while the other releases, thus obtaining the motion data of the shutter stop 6.

[0037] The first hinge shaft adopts a hinge pin 7. The shutter stop plate 6 has a pin hole in the middle for installing the hinge pin 7. After the hinge pin 7 is installed in the pin hole, it is connected to the shutter bracket 9, so that the shutter stop plate 6 can only rotate around the hinge pin 7.

[0038] In this embodiment, the shutter stop 6 has a Z-shaped structure, including a first rod, a turning part and a second rod connected in sequence. The first rod is located at the first end and the second rod is located at the second end. An elongated hole is opened on the second rod.

[0039] The control module adopts PWM waveform control, which controls the heating power of the electromagnet by adjusting the duty cycle of the current, thereby maintaining the electromagnet in a stable operating temperature range.

[0040] The shutter bracket 9 is provided with multiple first threaded holes 12 and is fixed to the inside of the shutter housing body 1 by multiple screws. The shutter bracket 9 is provided with a mounting part 901 for mounting the electromagnetic push rod 2. The mounting part 901 has a second threaded hole. The electromagnet and the outer cylinder are integrally mounted in the second threaded hole and connected by threads, and fixed to the shutter bracket 9 by a clamping structure. The shutter stop 6 is restricted in its rotational freedom by a hinge pin 7. The clamping mechanism can be a locking bolt 13. The mounting part 901 has a locking bolt 13 threaded hole for mounting the locking bolt 13, and the locking bolt 13 threaded hole communicates with the second threaded hole. The electromagnet can be clamped by turning the locking bolt 13.

[0041] The upper part of the shutter housing body 1 has a threaded hole for connecting the cable connector 10. The cable connector 10 is used to tighten the cables of the electromagnet and the limit switch 3. The shutter bracket 9 is used to place and support the electromagnet, the limit switch 3 and the shutter stop 6. The electromagnet is used to attract or release the electromagnet push rod 8 and realize the extension and retraction of the electromagnet push rod 8. The limit switch 3 is used to monitor the movement of the shutter stop 6 and thus provide the control module with the shutter's on / off status.

[0042] The outer casing has four threaded holes for securing the shutter panel and protecting the internal components. The electromagnet push rod 8 and the shutter stop 6 are connected by a spring pin 11. When the electromagnet push rod 8 moves axially, the spring pin 11 slides in the slot, causing the shutter stop 6 to rotate and block the light-transmitting hole 15, thus closing the shutter. The normally open shutter state is achieved by a tension spring. One end of the tension spring hooks onto the limiting pin 4 of the shutter bracket 9, and the other end hooks onto the limiting pin 4 of the shutter stop 6. The tension of the spring pulls the shutter stop 6 away from the light-transmitting hole 15.

[0043] Under normal operating conditions, the shutter can transmit light without consuming energy. In cases where long-term operation needs to be stopped or the shutter needs to be closed, this application also innovatively adopts a PWM waveform temperature control strategy to cope with this special operating environment.

[0044] Overall, this shutter mechanism is very cleverly designed, for example: Tension spring: When the electromagnet is not energized, the tension spring pulls the shutter stop 6 away from the light passage hole 15, so that the light passage hole 15 remains open.

[0045] Electromagnet: The shutter stop 6 has two states: open (or initial or normally open) and closed. When the electromagnet is energized, it attracts the electromagnet push rod 8 and causes it to retract. Figure 2 As shown, this causes the shutter stop 6 to rotate clockwise, placing it in the closed position and blocking the light aperture 15, thus blocking the laser. When the electromagnet is de-energized, under the combined action of the return spring and the tension spring, the electromagnet push rod 8 extends, and the shutter stop 6 rotates counterclockwise, as shown. Figure 3 As shown, shutter stop 6 returns to the open position, and light aperture 15 opens.

[0046] The entire shutter has a very compact structure, making it suitable for installation in space-constrained equipment. It can be used in laser processing equipment (such as laser cutting machines and laser marking machines), optical communication systems, automated testing equipment, and other laser application scenarios that require fast response and energy saving.

[0047] The overall principle of the shutter mechanism is as follows: when the system is not powered on, the tension spring hooks the shutter stop 6, exposing the light-transmitting hole 15. Figure 5As shown. When the system is powered on, the electromagnet attracts the electromagnet push rod 8, and drives the shutter stop 6 to rotate clockwise through the spring pin 11, overcoming the spring tension to block the light-transmitting hole 15. At this time, the right limit switch 3 is pressed and the left limit switch 3 is released. When the system is powered off, the electromagnet loses its attraction force, the tension spring hooks the shutter stop 6 and tightens it, the shutter stop 6 rotates counterclockwise, exposing the light-transmitting hole 15. At this time, the left limit switch 3 is pressed and the right limit switch 3 is released.

[0048] This solution uses a simple tension spring in conjunction with an electromagnet to achieve the opening and closing function, eliminating the need for complex mechanical transmission components, thus reducing system manufacturing costs. The overall structure is compact and suitable for space-constrained light-shielding applications. Furthermore, the system employs a PWM waveform temperature control strategy to maintain the electromagnet's rapid attraction of the shutter and keep it in a stable state, ensuring the reliability and accuracy of laser switching while preventing overheating of the electromagnet. This ensures long-term stable operation of the system, extending its service life. The shutter's on / off status is fed back via limit switch 3. This solution possesses significant practical value and market potential.

[0049] Advantages of this solution: 1. The shutter mechanical structure is designed so that the tension spring, electromagnet, shutter stop 6 and related structural components can realize the function of shutter being normally open and closed, while maintaining the characteristics of the entire shutter structure being small, compact and highly integrated.

[0050] 2. The intelligent temperature control system adopts a PWM waveform control strategy to adjust the current duty cycle, reduce the heat generated by the electromagnet when it is energized, avoid overheating, improve energy efficiency and electromagnet lifespan, improve system stability, and has a feedback system. If the shutter is used in a space-constrained working environment or the shutter status cannot be directly obtained, the movement of the shutter stop 6 is obtained through two limit switches 3, thereby feeding back the shutter's on / off status to the system without having to remove it.

[0051] Example 2 A laser system including the normally open laser shutter mechanism described above.

[0052] When the system is not powered on, the tension spring pulls the shutter stop 6 to keep the light hole 15 open; After the system is powered on, the control module starts the electromagnet, and the electromagnet push rod 8 drives the shutter stop 6 to rotate through the spring pin 11, closing the light passage hole 15; The control module uses PWM waveform to control the on / off frequency and duty cycle of the electromagnet in order to maintain the operating temperature of the electromagnet. Limit switch 3 detects the movement state of shutter stop 6 and feeds back the state information to the control module; After the system is powered off, the tension spring returns to its original state, and the shutter stop 6 automatically resets to the open state of the light hole 15.

[0053] Example 3 A shutter control method, applied to the laser system, includes the following steps: When the system is not powered on, the electromagnet push rod 8 is in the extended state, the elastic body 5 pulls the first end of the shutter stop 6 away from the light hole 15 and keeps the light hole 15 open, the shutter stop 6 is in the open position, and the light hole 15 is in the normally open state. After the system is powered on, the control module activates the electromagnet. The electromagnet push rod 8 retracts and drives the second hinge shaft to move in the long slot of the shutter stop 6, thereby driving the shutter stop 6 to rotate and overcome the tension of the elastic body 5, so that the first end of the shutter stop 6 blocks the light hole 15 and closes the light hole 15, and the shutter stop 6 is in the closed position. The control module uses PWM waveform to control the on / off frequency and duty cycle of the electromagnet in order to maintain the operating temperature of the electromagnet. Limit switch 3 detects the movement state of shutter stop 6 and feeds back the state information to the control module; After the system is powered off, the elastomer 5 returns to its original state, and the shutter stop 6 automatically resets to the open position, so that the light hole 15 is open and in the normally open state.

[0054] The beneficial effects of the technical solution of the present invention are: This application provides a normally open laser shutter mechanism. When the electromagnet is de-energized, the first end of the shutter stop 6 moves away from the light-transmitting hole 15, thus keeping the light-transmitting hole 15 open. When the electromagnet is energized, it attracts the electromagnet push rod 8, causing the push rod 8 to retract, which in turn drives the shutter stop 6 to rotate around the first hinge axis, thereby blocking the light-transmitting hole 15 with the first end of the shutter stop 6. Therefore, this shutter mechanism is a "normally open" design, meaning that the shutter is open by default when power is off (it can transmit light without energy), and only closes when power is on.

[0055] The advantages of this design are: 1. Energy saving: Power is only supplied when it needs to be turned off, and the normally open design reduces unnecessary power supply time; 2. Fast response: The laser can be output immediately when the laser is started, without waiting. It turns on immediately when the power is off, and the system starts up quickly. 3. Safer: The laser will not shut down unexpectedly in the event of a power outage, making it suitable for certain occasions that require continuous light transmission; 4. Intelligent temperature control: PWM waveform control strategy prevents electromagnet overheating and improves stability.

[0056] 5. Status feedback: The shutter status is fed back in real time through limit switch 3, which is suitable for automated systems.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A normally open laser shutter mechanism, comprising a shutter housing body (1), wherein a light-transmitting hole (15) is provided on the shutter housing body (1), characterized in that, Also includes: A shutter bracket (9) is disposed in the inner cavity of the shutter housing body (1); The shutter stop (6) is rotatably connected to the shutter bracket (9) through a first hinge shaft in the middle. The two ends of the shutter stop (6) are a first end and a second end, respectively. The first end is correspondingly set with the light-transmitting hole (15), and the second end is provided with a long groove. An elastomer (5) is provided, one end of which is connected to the shutter bracket (9) and the other end of which is connected to the first end of the shutter stop (6). The electromagnetic push rod (2) includes a matching electromagnet and an electromagnetic push rod (8) set in the internal channel of the electromagnet. The electromagnet is fixed on the shutter bracket (9). When the electromagnet is energized, the electromagnetic push rod (8) can move axially along the internal channel of the electromagnet. The electromagnetic push rod (8) is connected to the long slot on the shutter baffle (6) through the second hinge shaft. Limit switch (3) is installed on the shutter bracket (9) to detect the opening and closing state of the shutter stop (6); A control module, electrically connected to the electromagnet, is used to control the energization or de-energization of the electromagnet. When the electromagnet is de-energized, the shutter stop (6) is in the open position and opens the light-transmitting hole (15); when the electromagnet is energized, the shutter stop (6) is in the closed position and closes the light-transmitting hole (15).

2. The normally open laser shutter mechanism according to claim 1, characterized in that, Limiting pins (4) are respectively provided on the first end of the shutter stop (6) and the shutter bracket (9), and are used to connect the two ends of the elastic body (5).

3. The normally open laser shutter mechanism according to claim 2, characterized in that, The elastic body (5) is a tension spring, and the tension spring is a helical tension spring, with its two ends hooked onto the limiting pins (4) set on the shutter bracket (9) and the shutter stop (6), respectively.

4. The normally open laser shutter mechanism according to claim 1, characterized in that, The second hinge shaft adopts a spring pin (11), and the elongated groove adopts an oblong groove (16). The electromagnet push rod (8) is inserted into the waist-shaped groove (16) of the shutter stop (6) through the spring pin (11). When the electromagnet push rod (8) moves axially, the spring pin (11) slides in the waist-shaped groove (16), thereby driving the shutter stop (6) to rotate around the hinge pin (7) to achieve shutter closure.

5. The normally open laser shutter mechanism according to claim 1, characterized in that, There are two limit switches (3), which are respectively set on the shutter bracket (9) and located on both sides of the shutter stop (6). They are used to detect the open and closed position of the shutter stop (6) and feed back the status signal to the control module.

6. The normally open laser shutter mechanism according to claim 1, characterized in that, The first hinge shaft adopts a hinge pin (7), and the shutter stop (6) has a pin hole in the middle for installing the hinge pin (7).

7. The normally open laser shutter mechanism according to claim 1, characterized in that, The control module adopts PWM waveform control, which controls the heating power of the electromagnet by adjusting the duty cycle of the current, thereby maintaining the electromagnet in a stable operating temperature range.

8. The normally open laser shutter mechanism according to claim 1, characterized in that, The shutter bracket (9) is provided with multiple first threaded holes (12) and fixed inside the shutter housing body (1) by multiple screws. The shutter bracket (9) is provided with a mounting part (901) for mounting the electromagnetic push rod (2). The mounting part (901) is provided with a second threaded hole. The electromagnet is installed in the second threaded hole and connected by threads, and fixed to the shutter bracket (9) by a clamping structure. The shutter stop (6) achieves rotational freedom restriction by hinge pin (7).

9. A laser system, characterized in that, Includes the normally open laser shutter mechanism as described in any one of claims 1 to 8.

10. A shutter control method, applied to the laser system as described in claim 9, characterized in that, Includes the following steps: When the system is not powered on, the electromagnet push rod (8) is in the extended state, the elastic body (5) pulls the first end of the shutter stop (6) away from the light hole (15) and keeps the light hole (15) open, the shutter stop (6) is in the open position, and the light hole (15) is in the normally open state. After the system is powered on, the control module starts the electromagnet, the electromagnet push rod (8) retracts and drives the second hinge shaft to move in the long slot of the shutter stop (6), thereby driving the shutter stop (6) to rotate and overcome the tension of the elastic body (5), so that the first end of the shutter stop (6) blocks the light hole (15) and closes the light hole (15), and the shutter stop (6) is in the closed position; The control module uses PWM waveform to control the on / off frequency and duty cycle of the electromagnet in order to maintain the operating temperature of the electromagnet. Limit switch (3) detects the movement state of shutter stop (6) and feeds back the state information to the control module; After the system is powered off, the elastomer (5) returns to its original state, and the shutter stop (6) automatically resets to the open position, so that the light hole (15) is open and in the normally open state.

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