Novel beam limiting device

Abstract

The utility model discloses a novel beam limiting device, which relates to the technical field of beam limiting devices and comprises a bottom plate, a mounting frame is fixedly mounted on the bottom plate, an inner door component, a filtering component, a shading cylinder component and a mainboard component are sequentially mounted in the bottom plate and the mounting frame along the Z direction, a shell is mounted on the bottom plate, and the inner door component comprises a first mounting plate and two pairs of tower-shaped inner doors. The first installation plate is fixedly installed on the bottom plate, and the two pairs of tower-shaped inner doors are installed on the first installation plate in a sliding mode in the X direction and the Y direction respectively. By means of the restructural design and the additional arrangement of the shading cylinder, the protection performance is enhanced, the movement mode of the lead hinge is changed, and the lead hinge and the tower-shaped inner doors are driven by the stepping motor to conduct mirror image relative movement at the same time. The large light field of X-rays can be achieved, the radiation leakage condition is controlled, and different aluminum equivalents are remotely controlled to be filtered by additionally arranging the internal filtering assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of beam limiters, in particular to a novel beam limiter. Background Art

[0002] An X-ray generator is a device that can generate X-rays for clinical diagnosis. It is mainly composed of a high-voltage generator, a tube and a beam limiter. The beam limiter is usually located under the tube. The X-rays emitted by the tube are irradiated to the object under examination through the beam limiter. The beam limiter, also known as a "shielder", "light shrinker" or "light beamer", is used to limit the irradiation range of the X-rays emitted from the tube to minimize the dose of X-rays received by the object under examination.

[0003] Now with the development of imaging systems, beam limiters are required to achieve high protection and filter radiation leakage while ensuring a large light field. At the same time, they are also required to be able to remotely control the change of light field size and the filtering of different aluminum equivalents. The old beam limiters, while ensuring a large light field, are not ideal in terms of protection and filtering of radiation leakage, and they are also unable to remotely control the filtering of different aluminum equivalents. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a new beam limiter, which performs structural design on the old beam limiter, enhances the protection of the beam limiter, adds a structure for filtering radiation leakage, and adds built-in additional filtering to achieve remote control of filtering of different aluminum equivalents.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a new type of beam limiter, including a bottom plate, a mounting frame is fixedly installed on the bottom plate, an inner door assembly, a filter assembly, a light shielding cylinder assembly, and a mainboard assembly are sequentially installed in the bottom plate and the mounting frame along the Z direction, and a shell is installed on the bottom plate;

[0006] The inner door assembly comprises a mounting plate 1 and two pairs of tower-shaped inner doors, wherein the mounting plate 1 is fixedly mounted on the bottom plate, and the two pairs of tower-shaped inner doors are slidably mounted on the mounting plate 1 along the X direction and the Y direction respectively, and a pair of tower-shaped inner doors located in the same direction are arranged opposite to each other and can be close to or away from each other, and both sides of each tower-shaped inner door are provided with splicing teeth, and each two adjacent tower-shaped inner doors are connected to each other through the splicing teeth;

[0007] The filtering assembly includes a gear plate, an L-shaped plate is fixedly mounted on the mounting frame, the gear plate is rotatably mounted on the L-shaped plate, a plurality of filter plates and an opening are mounted on the gear plate, and the opening or one of the filter plates can be moved above the center of the two pairs of tower-shaped inner doors by rotating the gear plate;

[0008] The light-shielding cylinder assembly comprises a cylinder body, the cylinder body is fixedly mounted on the mounting frame, a lens capable of adjusting an angle is arranged in the cylinder body, a lamp tube is fixedly mounted on one side of the cylinder body, a positioning lamp is fixedly mounted on one side of the lamp tube on the mounting frame, and the outer surfaces of the cylinder body and the lamp tube are covered with a lead protective plate;

[0009] The mainboard assembly includes a second mounting plate and two pairs of lead plates. The two pairs of lead plates are slidably installed on the upper and lower sides of the second mounting plate along the X direction and the Y direction respectively. A pair of lead plates located in the same direction are relatively arranged and can be close to or away from each other.

[0010] Preferably, a rotating shaft 1 and a rotating shaft 2 are rotatably arranged on the base plate and the mounting plate 2, a gear a1 and a gear a2 are fixedly arranged on the rotating shaft 1, a gear b1 and a gear b2 are fixedly arranged on the rotating shaft 2, a motor 1 and a motor 2 are fixedly arranged on the mounting frame, a gear is fixedly arranged on the driving end of the motor 1 and meshes with the gear b2, and a gear is fixedly arranged on the driving end of the motor 2 and meshes with the gear a2.

[0011] Preferably, two pairs of mounting openings are provided on the mounting plate, two pairs of slide seats are slidably provided in the two pairs of mounting openings, the two pairs of tower-shaped inner doors are fixedly installed on the two pairs of slide seats, two pairs of levers are hinged on the mounting plate, a pin shaft is fixedly installed on the slide seat, a long hole is provided on the lever, the pin shaft is placed in the long hole, and two groups of slide seat driving components for driving the two pairs of slide seats to move separately are provided on the bottom plate.

[0012] Preferably, the slide drive assembly includes a mounting seat, an optical axis 1 is fixedly provided on the mounting seat, a clamping block 1 and a clamping block 2 are slidably provided on the optical axis 1, two freely rotatable pulleys 1 are provided above both ends of the optical axis 1, a synchronous belt 1 is installed between the two pulleys 1, the clamping block 1 and the clamping block 2 are respectively fixed on both sides of the synchronous belt 1, a pair of the ends of the shifting rods are each provided with a long hole 2, the clamping block 1 and the clamping block 2 are both fixedly provided with a pin shaft 2, the pin shaft 2 is placed in the long hole 2, the rotation of the synchronous belt 1 can make the clamping block 1 and the clamping block 2 move relative to each other, thereby driving a pair of slides to move relative to each other through a pair of shifting rods, a driven gear 1 is fixedly provided on one of the two pulleys 1, and the driven gear 1 in the two groups of the slide drive assemblies are respectively meshed with gear a1 and gear b1.

[0013] Preferably, two pairs of optical axes 2 are fixedly arranged on the mounting plate 2, and the two pairs of optical axes 2 are respectively arranged in a criss-cross shape on the upper and lower sides of the mounting plate 2. A pair of slides are slidably arranged on each pair of optical axes 2, and the lead plate is fixedly installed on the slide. Two groups of slide driving components for driving the two pairs of slides to move respectively are arranged on the mounting plate 2. A lead plate optical coupler is fixedly arranged on the mounting plate 2, and a baffle is fixedly installed on the slide. The movement of the slide can move the baffle into the groove of the lead plate optical coupler.

[0014] Preferably, the slide drive assembly includes pulley two and pulley three, a synchronous belt two is installed between pulley two and pulley three, a pair of slides are respectively fixedly installed with connecting member one and connecting member two, connecting member one and connecting member two are respectively fixed on both sides of synchronous belt two, and the rotation of synchronous belt two can make connecting member one and connecting member two move relative to each other.

[0015] Preferably, the pulley two in one group of the slide drive assemblies is rotatably set on the mounting plate two, and the pulley three is fixedly installed on the top of the rotating shaft two; and the pulley two in another group of the slide drive assemblies is rotatably set on the rotating shaft two, and the pulley three is fixedly installed on the rotating shaft one.

[0016] Preferably, a filtering motor is fixedly mounted on the bottom plate, a gear meshing with the gear plate is fixedly mounted on the driving end of the filtering motor, a filtering optical coupler is also fixedly arranged on the bottom plate, and an edge of the gear plate is disposed in a groove of the filtering optical coupler.

[0017] Preferably, a pair of rotating shafts three are rotatably provided on the two side walls of the barrel, a fixing block is fixedly provided at one end of the rotating shaft three located inside the barrel, the lens is mounted on the fixing block, a positioning plate is fixedly provided at one end of the rotating shaft three located outside the barrel, an arc-shaped sliding opening is provided on the positioning plate, a screw one is screwed on the outer wall of the barrel, and the screw one is placed in the arc-shaped sliding opening.

[0018] Preferably, a connecting ring is fixedly provided on the base plate, a hanging plate is inserted in the connecting ring, two pressure plates are fixedly installed on the connecting ring by screws, the pressure plates are pressed on the edges of the hanging plate, a threaded top rod is screwed on one side of the connecting ring, one end of the threaded top rod abuts against the hanging plate, and a protective ring is fixedly installed on the base plate inside the connecting ring.

[0019] Beneficial Effects

[0020] The utility model provides a novel beam limiter, which has the following beneficial effects: through the redesign of the structure and the addition of a light-shielding tube, the protectiveness is enhanced, the movement mode of the lead sheet is changed, and the lead sheet and the tower-shaped inner door are driven by a stepper motor to move relative to each other in a mirror image, so that the X-ray can achieve a larger light field and control the external leakage of radiation, and by adding internal filtering components, remote control of filtering of different aluminum equivalents is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional Figure 1 ;

[0022] Figure 2 The three-dimensional Figure 2 ;

[0023] Figure 3 This is a cross-sectional view of the internal structure of the utility model;

[0024] Figure 4 It is a three-dimensional diagram of the internal structure of the utility model;

[0025] Figure 5 is a three-dimensional diagram of a filtration assembly;

[0026] Figure 6 is a three-dimensional image of the filter disc;

[0027] Figure 7 For the three-dimensional interior door components Figure 1 ;

[0028] Figure 8 For the three-dimensional interior door components Figure 2 ;

[0029] Fig. 9 It is a three-dimensional diagram of the tower-shaped inner door;

[0030] Fig.10 A three-dimensional diagram of the frame;

[0031] Fig.11 is a front view of the rotating shaft 1;

[0032] Fig.12 It is the front view of the second rotating shaft;

[0033] Fig.13 is a three-dimensional diagram of a light-shielding tube assembly;

[0034] Fig.14 Three-dimensional motherboard components Figure 1 ;

[0035] Fig.15 Three-dimensional motherboard components Figure 2 ;

[0036] Fig.16is a three-dimensional diagram of the carriage;

[0037] Fig.17 This is a cross-sectional view of the hanging plate.

[0038] In the figure: 1, bottom plate; 1-1, hanging plate; 1-2, shaft 1; 1-2-1, gear a1; 1-2-2, gear a2; 1-3, shaft 2; 1-3-1, gear b1; 1-3-2, gear b2; 1-4, connecting ring; 1-5, pressing plate; 1-6, threaded top rod; 1-7, protective ring;

[0039] 2. Inner door assembly; 2-1. Mounting plate 1; 2-2. Mounting port; 2-3. Sliding seat; 2-4. Pin 1; 2-5. Tower-type inner door; 2-6. Lever; 2-7. Mounting seat; 2-8. Optical axis 1; 2-9. Clamp 1; 2-10. Clamp 2; 2-11. Pulley 1; 2-12. Driven gear 1; 2-13. Synchronous belt 1; 2-14. Pin 2;

[0040] 3. Mounting frame;

[0041] 4. Filter assembly; 4-1. Gear plate; 4-2. Filter plate; 4-3. Opening; 4-4. Filter motor; 4-5. Filter optical coupler; 4-6. L-shaped plate;

[0042] 5. Shading tube assembly; 5-1. Tube body; 5-2. Lamp tube; 5-3. Rotating shaft three; 5-4. Fixing block; 5-5. Lens; 5-6. Positioning plate; 5-7. Arc-shaped sliding mouth; 5-8. Screw one; 5-9. Positioning lamp;

[0043] 6. Mainboard assembly; 6-1. Optical axis 2; 6-2. Slide; 6-3. Lead plate; 6-4. Pulley 2; 6-5. Pulley 3; 6-6. Synchronous belt 2; 6-7. Connector 1; 6-8. Connector 2; 6-9. Mounting plate 2; 6-10. Lead plate optical coupler; 6-11. Blocking piece;

[0044] 7. Shell;

[0045] 8a, motor one; 8b, motor two. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0047] See also Figure 1-17 The utility model provides a technical solution: a new type of beam limiter, including a bottom plate 1, a mounting frame 3 is fixedly mounted on the bottom plate 1, an inner door assembly 2, a filter assembly 4, a light shielding tube assembly 5, and a main board assembly 6 are sequentially mounted in the bottom plate 1 and the mounting frame 3 along the Z direction, a shell 7 is mounted on the bottom plate 1, and an adjustment knob is provided on the shell;

[0048] The inner door assembly 2 includes a mounting plate 2-1 and two pairs of tower-shaped inner doors 2-5. The mounting plate 2-1 is fixedly mounted on the bottom plate 1. The two pairs of tower-shaped inner doors 2-5 are slidably mounted on the mounting plate 2-1 along the X direction and the Y direction respectively. A pair of tower-shaped inner doors 2-5 located in the same direction are arranged opposite to each other and can be close to or away from each other. Both sides of each tower-shaped inner door 2-5 are provided with splicing teeth. Every two adjacent tower-shaped inner doors 2-5 are connected to each other through the splicing teeth. The tower-shaped inner doors 2-5 can block the radiation outside the focus to the greatest extent.

[0049] The filter assembly 4 includes a gear plate 4-1, an L-shaped plate 4-6 is fixedly mounted on the mounting frame 3, the gear plate 4-1 is rotatably mounted on the L-shaped plate 4-6, a plurality of filter plates 4-2 and an opening 4-3 are mounted on the gear plate 4-1, and the opening 4-3 or one of the filter plates 4-2 can be moved to the upper part of the center of the two pairs of tower-shaped inner doors 2-5 by rotating the gear plate 4-1, so as to select different aluminum equivalent filtration;

[0050] The light-shielding tube assembly 5 comprises a tube body 5-1, which is fixedly mounted on the mounting frame 3. A lens 5-5 capable of adjusting an angle is arranged inside the tube body 5-1. A lamp tube 5-2 is fixedly mounted on one side of the tube body 5-1. A positioning lamp 5-9 is fixedly mounted on one side of the lamp tube 5-2 on the mounting frame 3. The outer surfaces of the tube body 5-1 and the lamp tube 5-2 are covered with a lead protective plate. The light-shielding tube assembly 5 can prevent X-ray leakage, protect the operator and the irradiated object, and the positioning lamp 5-9 functions to simulate the X-ray light source and position of the tube. After the positioning lamp is powered on, the emitted visible light is reflected by the lens 5-5 in the light-shielding tube assembly 5, and then emitted from the beam limiter opening and irradiated onto the object to be inspected (i.e., the part of the patient to be inspected). The irradiated position is equivalent to the position where the X-ray irradiates the object to be inspected, thereby realizing the positioning of the X-ray irradiation area.

[0051] The mainboard assembly 6 includes a mounting plate 6-9 and two pairs of lead plates 6-3. The two pairs of lead plates 6-3 are slidably installed on the upper and lower sides of the mounting plate 6-9 along the X direction and the Y direction respectively. A pair of lead plates 6-3 located in the same direction are arranged opposite to each other and can be close to or away from each other. The size of the beam limiter opening is controlled by the lead plates 6-3, thereby determining the irradiation range of the X-rays.

[0052] As an embodiment of the utility model, a rotating shaft 1-2 and a rotating shaft 1-3 are rotatably arranged on the base plate 1 and the mounting plate 2 6-9, a gear a11-2-1 and a gear a21-2-2 are fixedly arranged on the rotating shaft 1-2, a gear b11-3-1 and a gear b21-3-2 are fixedly arranged on the rotating shaft 2 1-3, a motor 1 8a and a motor 2 8b are fixedly arranged on the mounting frame 3, a gear is fixedly arranged on the driving end of the motor 1 8a and meshed with the gear b21-3-2, and a gear is fixedly arranged on the driving end of the motor 2 8b and meshed with the gear a21-2-2.

[0053] As an embodiment of the utility model, two pairs of mounting openings 2-2 are provided on the mounting plate 2-1, two pairs of slide seats 2-3 are slidably provided in the two pairs of mounting openings 2-2, two pairs of tower-shaped inner doors 2-5 are fixedly installed on the two pairs of slide seats 2-3, two pairs of levers 2-6 are hinged on the mounting plate 2-1, a pin shaft 2-4 is fixedly installed on the slide seat 2-3, a long hole 1 is provided on the lever 2-6, and the pin shaft 2-4 is placed in the long hole 1, and two groups of slide seat driving components for driving the two pairs of slide seats 2-3 to move separately are provided on the base plate 1.

[0054] As an embodiment of the utility model, the slide drive assembly includes a mounting seat 2-7, an optical axis 2-8 is fixedly arranged on the mounting seat 2-7, a clamping block 2-9 and a clamping block 2-10 are slidably arranged on the optical axis 2-8, two freely rotatable pulleys 2-11 are arranged above the two ends of the optical axis 2-8, a synchronous belt 2-13 is arranged between the two pulleys 2-11, the clamping block 2-9 and the clamping block 2-10 are respectively fixed on both sides of the synchronous belt 2-13, a pair of levers 2-6 are provided with long holes 2 at the ends, and the clamping block 2-9 and the clamping block 2-10 are fixedly provided with a pin 2 -14, pin shaft 2-14 is placed in long hole 2, and the rotation of synchronous belt 1-13 can make clamp block 1-2-9 and clamp block 2-10 move relative to each other, thereby driving a pair of slide seats 2-3 to move relative to each other through a pair of levers 2-6, and a driven gear 1-2-12 is fixedly provided on one of the two pulleys 1-11. The driven gear 1-2-12 in the two sets of slide seat drive assemblies are respectively meshed with gear a11-2-1 and gear b11-3-1, and the two sets of slide seat drive assemblies can be driven respectively through rotating shaft 1-2 and rotating shaft 2-3 to realize the control of the opening and closing of the tower-shaped inner door 2-5 in the X and Y directions respectively.

[0055] As an embodiment of the utility model, two pairs of optical axes 6-1 are fixedly arranged on the mounting plate 6-9, and the two pairs of optical axes 6-1 are respectively arranged in a criss-cross pattern on the upper and lower sides of the mounting plate 6-9, and a pair of slides 6-2 are slidably arranged on each pair of optical axes 6-1, and a lead plate 6-3 is fixedly installed on the slide 6-2. Two groups of slide drive components for driving the two pairs of slides 6-2 to move respectively are arranged on the mounting plate 6-9, a lead plate optical coupler 6-10 is fixedly arranged on the mounting plate 6-9, and a baffle 6-11 is fixedly installed on the slide 6-2. The movement of the slide 6-2 can move the baffle 6-11 into the groove of the lead plate optical coupler 6-10, and the position of the lead plate 6-3 can be detected by the lead plate optical coupler 6-10.

[0056] As an embodiment of the utility model, the slide 6-2 driving assembly includes a pulley 2 6-4 and a pulley 3 6-5, a synchronous belt 2 6-6 is installed between the pulley 2 6-4 and the pulley 3 6-5, a pair of slides 6-2 are respectively fixedly installed with a connecting member 1 6-7 and a connecting member 2 6-8, the connecting member 1 6-7 and the connecting member 2 6-8 are respectively fixed on both sides of the synchronous belt 2 6-6, and the connecting member 1 6-7 and the connecting member 2 6-8 can be made to move relative to each other by rotating the synchronous belt 2 6-6.

[0057] As an embodiment of the utility model, in one group of slide drive assemblies, pulley two 6-4 is rotatably set on mounting plate two 6-9, and pulley three 6-5 is fixedly installed on the top of rotating shaft two 1-3; in another group of slide drive assemblies, pulley two 6-4 is rotatably set on rotating shaft two 1-3, and pulley three 6-5 is fixedly installed on rotating shaft one 1-2; the two groups of slide drive assemblies can be driven respectively by rotating shaft one 1-2 and rotating shaft two 1-3, so as to respectively control the opening and closing of lead plate 6-3 in X and Y directions, and ensure the synchronous movement of lead plate 6-3 and tower-shaped inner door 2-5.

[0058] As an embodiment of the utility model, a filtering motor 4-4 is fixedly installed on the base plate 1, and a gear meshing with the gear plate 4-1 is fixedly installed on the driving end of the filtering motor 4-4. A filtering optical coupler 4-5 is also fixedly arranged on the base plate 1, and the edge of the gear plate 4-1 is disposed in the groove of the filtering optical coupler 4-5. The rotation of the gear plate 4-1 can be automatically controlled by connecting the filtering motor 4-4 to the motor control system. The motor control system gives an electrical signal to rotate the gear plate 4-1, and according to the number of signal pulses, the filter 4-2 will face the light inlet of the base plate 1 with the corresponding material thickness.

[0059] As an embodiment of the utility model, a pair of rotating shafts 5-3 are rotatably arranged on the two side walls of the cylinder 5-1, a fixing block 5-4 is fixedly arranged on one end of the rotating shaft 5-3 located inside the cylinder 5-1, and the lens 5-5 is installed on the fixing block 5-4, and a positioning plate 5-6 is fixedly arranged on one end of the rotating shaft 5-3 located outside the cylinder 5-1, and an arc-shaped sliding opening 5-7 is opened on the positioning plate 5-6, and a screw 5-8 is screwed on the outer wall of the cylinder 5-1, and the screw 5-8 is placed in the arc-shaped sliding opening 5-7. The angle of the lens 5-5 can be adjusted by loosening the screw 5-8. When the reflected visible light is adjusted to coincide with the shape of the X-ray irradiation, the screw is locked.

[0060] As an embodiment of the utility model, a connecting ring 1-4 is fixedly provided on the base plate 1, and a hanging plate 1-1 is inserted in the connecting ring 1-4. Two pressure plates 1-5 are fixedly installed on the connecting ring 1-4 by screws, and the pressure plates 1-5 are pressed on the edge of the hanging plate 1-1. A threaded top rod 1-6 is screwed on one side of the connecting ring 1-4, and one end of the threaded top rod 1-6 abuts against the hanging plate 1-1. A protective ring 1-7 is fixedly installed on the base plate 1 inside the connecting ring 1-4. The hanging plate 1-1 can be fixed by locking screws by pushing the pressure plates 1-5 on both sides, and the hanging plate 1-1 and the connecting ring 1-4 can be circumferentially limited by tightening or loosening the threaded top rod 1-6.

[0061] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel beam limiter, characterized in that: It comprises a base plate (1), a mounting frame (3) is fixedly mounted on the base plate (1), an inner door assembly (2), a filter assembly (4), a light shielding cylinder assembly (5), and a mainboard assembly (6) are sequentially mounted in the base plate (1) and the mounting frame (3) along the Z direction, and a shell (7) is mounted on the base plate (1); The inner door assembly (2) comprises a mounting plate (2-1) and two pairs of tower-shaped inner doors (2-5); the mounting plate (2-1) is fixedly mounted on the bottom plate (1); the two pairs of tower-shaped inner doors (2-5) are slidably mounted on the mounting plate (2-1) along the X direction and the Y direction respectively; a pair of tower-shaped inner doors (2-5) located in the same direction are arranged opposite to each other and can be close to or away from each other; both sides of each tower-shaped inner door (2-5) are provided with splicing teeth; and each two adjacent tower-shaped inner doors (2-5) are connected to each other via the splicing teeth; The filtering assembly (4) comprises a gear plate (4-1), an L-shaped plate (4-6) is fixedly mounted on the mounting frame (3), the gear plate (4-1) is rotatably mounted on the L-shaped plate (4-6), a plurality of filter plates (4-2) and an opening (4-3) are mounted on the gear plate (4-1), and the opening (4-3) or one of the filter plates (4-2) can be moved to the upper part of the center of the two pairs of tower-shaped inner doors (2-5) by rotating the gear plate (4-1); The light-shielding tube assembly (5) comprises a tube body (5-1), the tube body (5-1) is fixedly mounted on the mounting frame (3), a lens (5-5) capable of adjusting an angle is arranged inside the tube body (5-1), a lamp tube (5-2) is fixedly mounted on one side of the tube body (5-1), a positioning lamp (5-9) is fixedly mounted on one side of the lamp tube (5-2) on the mounting frame (3), and the outer surfaces of the tube body (5-1) and the lamp tube (5-2) are covered with a lead protective plate; The mainboard assembly (6) comprises a second mounting plate (6-9) and two pairs of lead plates (6-3). The two pairs of lead plates (6-3) are slidably mounted on the upper and lower sides of the second mounting plate (6-9) along the X direction and the Y direction respectively. A pair of lead plates (6-3) located in the same direction are arranged opposite to each other and can be close to or away from each other.

2. A novel beam limiter according to claim 1, characterized in that: The bottom plate (1) and the second mounting plate (6-9) are rotatably provided with a rotating shaft (1-2) and a rotating shaft (1-3); the rotating shaft (1-2) is fixedly provided with a gear (1-2-1) and a gear (1-2-2); the rotating shaft (1-3) is fixedly provided with a gear (1-3-1) and a gear (1-3-2); the mounting frame (3) is fixedly provided with a motor (8a) and a motor (8b); a driving end of the motor (8a) is fixedly provided with a gear and meshes with the gear (1-3-2); a driving end of the motor (8b) is fixedly provided with a gear and meshes with the gear (1-2-2).

3. A novel beam limiter according to claim 2, characterized in that: The mounting plate (2-1) is provided with two pairs of mounting openings (2-2), two pairs of slide seats (2-3) are slidably arranged in the two pairs of mounting openings (2-2), two pairs of tower-shaped inner doors (2-5) are fixedly arranged on the two pairs of slide seats (2-3), two pairs of shifting rods (2-6) are hingedly connected to the mounting plate (2-1), a pin shaft (2-4) is fixedly arranged on the slide seat (2-3), a long hole (2-4) is provided on the shifting rod (2-6), and the pin shaft (2-4) is arranged in the long hole (2-4), and two groups of slide seat driving components for driving the two pairs of slide seats (2-3) to move respectively are arranged on the bottom plate (1).

4. A novel beam limiter according to claim 3, characterized in that: The slide drive assembly comprises a mounting seat (2-7), an optical axis 1 (2-8) is fixedly arranged on the mounting seat (2-7), a clamping block 1 (2-9) and a clamping block 2 (2-10) are slidably arranged on the optical axis 1 (2-8), two freely rotatable pulleys 1 (2-11) are arranged above both ends of the optical axis 1 (2-8), a synchronous belt 1 (2-13) is arranged between the two pulleys 1 (2-11), the clamping block 1 (2-9) and the clamping block 2 (2-10) are respectively fixed on both sides of the synchronous belt 1 (2-13), and a pair of the ends of the shifting rods (2-6) are provided with long holes 2, and the clamping blocks A pin shaft 2 (2-14) is fixedly arranged on both the first (2-9) and the second clamping block (2-10), and the pin shaft 2 (2-14) is placed in the second long hole. The rotation of the synchronous belt 1 (2-13) can make the clamping block 1 (2-9) and the second clamping block (2-10) move relative to each other, thereby driving a pair of slide seats (2-3) to move relative to each other through a pair of shifting rods (2-6). A driven gear 1 (2-12) is fixedly arranged on one of the two pulleys 1 (2-11), and the driven gears 1 (2-12) in the two sets of slide seat driving assemblies are respectively meshed with the gear a1 (1-2-1) and the gear b1 (1-3-1).

5. A novel beam limiter according to claim 2, characterized in that: Two pairs of optical axes (6-1) are fixedly arranged on the second mounting plate (6-9), and the two pairs of optical axes (6-1) are arranged in a tic-tac-toe pattern on the upper and lower sides of the second mounting plate (6-9), and a pair of slides (6-2) are slidably arranged on each pair of optical axes (6-1), and the lead plate (6-3) is fixedly installed on the slide (6-2). Two groups of slide drive components for driving the two pairs of slides (6-2) to move respectively are arranged on the second mounting plate (6-9), and a lead plate optical coupler (6-10) is fixedly arranged on the second mounting plate (6-9), and a baffle (6-11) is fixedly installed on the slide (6-2), and the movement of the slide (6-2) can move the baffle (6-11) into the groove of the lead plate optical coupler (6-10).

6. A novel beam limiter according to claim 5, characterized in that: The slide drive assembly comprises a second pulley (6-4) and a third pulley (6-5), a synchronous belt (6-6) is arranged between the second pulley (6-4) and the third pulley (6-5), a connecting piece (6-7) and a connecting piece (6-8) are respectively fixedly installed on a pair of slides (6-2), the connecting piece (6-7) and the connecting piece (6-8) are respectively fixed on both sides of the synchronous belt (6-6), and the rotation of the synchronous belt (6-6) can make the connecting piece (6-7) and the connecting piece (6-8) move relative to each other.

7. A novel beam limiter according to claim 6, characterized in that: The pulley 2 (6-4) in one group of the slide (6-2) driving assemblies is rotatably arranged on the mounting plate 2 (6-9), and the pulley 3 (6-5) is fixedly installed on the top of the rotating shaft 2 (1-3); the pulley 2 (6-4) in another group of the slide driving assemblies is rotatably arranged on the rotating shaft 2 (1-3), and the pulley 3 (6-5) is fixedly installed on the rotating shaft 1 (1-2).

8. A novel beam limiter according to claim 1, characterized in that: A filtering motor (4-4) is fixedly mounted on the bottom plate (1); a gear meshing with the gear plate (4-1) is fixedly mounted on the driving end of the filtering motor (4-4); a filtering optical coupler (4-5) is also fixedly arranged on the bottom plate (1); an edge of the gear plate (4-1) is disposed in a groove of the filtering optical coupler (4-5).

9. A novel beam limiter according to claim 1, characterized in that: A pair of rotating shafts (5-3) are rotatably arranged on the two side walls of the barrel (5-1); a fixing block (5-4) is fixedly arranged on one end of the rotating shaft (5-3) located inside the barrel (5-1); the lens (5-5) is mounted on the fixing block (5-4); a positioning plate (5-6) is fixedly arranged on one end of the rotating shaft (5-3) located outside the barrel (5-1); an arc-shaped sliding opening (5-7) is opened on the positioning plate (5-6); a screw (5-8) is screwed on the outer wall of the barrel (5-1); and the screw (5-8) is placed in the arc-shaped sliding opening (5-7).

10. A novel beam limiter according to claim 1, characterized in that: A connecting ring (1-4) is fixedly arranged on the bottom plate (1), a hanging plate (1-1) is inserted in the connecting ring (1-4), two pressing plates (1-5) are fixedly installed on the connecting ring (1-4) by screws, the pressing plates (1-5) are pressed on the edge of the hanging plate (1-1), a threaded push rod (1-6) is screwed on one side of the connecting ring (1-4), one end of the threaded push rod (1-6) is abutted against the hanging plate (1-1), and a protective ring (1-7) is fixedly installed on the bottom plate (1) located in the connecting ring (1-4).

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