A safety shield with adjustable lead screen coverage

Abstract

This invention relates to the technical field of radiation protection and discloses a safety protection device with adjustable lead screen coverage. The device includes a vertical frame, a flexible lead-coated curtain section, a first adjustment component, and a second adjustment component. The flexible lead-coated curtain section is mounted on the vertical frame and comprises an upper curtain group and a lower curtain group, each composed of multiple parallel-suspended lead strips. The first adjustment component is connected to the lead strips and drives them to move vertically. Two first adjustment components are provided, one corresponding to the upper curtain group and the other to the lower curtain group, causing the bottom center of the upper curtain group to bulge downwards and the top center of the lower curtain group to bulge upwards. This device, by constructing an hourglass-shaped projection window, physically blocks edge-scattered radiation from reaching the thyroid and gonads, eliminating blind spots and achieving precise shielding of sensitive organs.

Description

Technical Field

[0001] This invention relates to the field of radiation protection technology, and more particularly to a safety protection device with adjustable lead screen coverage. Background Technology

[0002] Medical X-ray diagnostic technology is an indispensable diagnostic tool in clinical medicine. However, X-rays are ionizing radiation, and excessive exposure can potentially damage radiation-sensitive organs such as the thyroid and gonads. Based on the radiation protection system proposed by the International Commission on Radiological Protection (ICRP), medical irradiation must adhere to the principle of "optimal protection," which means minimizing the radiation dose to both the patient and medical personnel while obtaining necessary diagnostic information. Therefore, using protective devices such as lead screens to shield non-irradiated areas during radiological examinations is an important measure to reduce radiation risks and ensure medical safety.

[0003] Currently, most known radiation protection devices use lead rubber products (such as lead aprons and lead neck warmers) or portable lead screens. For example, Chinese patent CN222899153U discloses an active adjustment device for the coverage area of ​​a lead screen, which includes two ground rails. Each ground rail has a movable component at its upper end. A linkage ranging device is fixedly installed on one side of each movable component. An electrically controlled telescopic column and its attached lead screen are fixedly connected to the upper end of the movable component.

[0004] However, most protective screens used in clinical practice currently have a rectangular opening structure. In diagnostic radiology, the X-ray beam, emitted from the focal point of the X-ray tube, is projected onto the human body in a cone-shaped divergence. Because the top and bottom edges of the rectangular window are straight, but the X-ray beam diverges, if the rectangular window is set too wide, although the projection range is guaranteed, the straight edges at the top and bottom corners of the window cannot effectively block the scattered rays that diverge to both sides. This results in the thyroid gland (neck) and gonads (lower abdomen) located at the edge of the radiation field being easily exposed to the leaky area. This geometric mismatch creates a protective blind spot, making it difficult to achieve precise and close shielding of sensitive organs. Summary of the Invention

[0005] Given that existing technologies have the problem that rectangular opening screens cannot be adapted to cone-shaped diverging X-ray beams, resulting in sensitive organs such as the thyroid gland and gonads at the upper and lower corners of the radiation field being exposed to the leakage zone and forming a protection blind spot, a safety protection device with adjustable lead screen coverage is proposed.

[0006] This application provides a safety protection device with adjustable lead screen coverage, the purpose of which is to effectively solve the problem of the mismatch between the rectangular opening of the traditional protective screen and the geometric shape of the X-ray cone beam, eliminate the protection blind spot, and achieve precise shielding of sensitive organs.

[0007] The technical solution of the present invention is as follows: a safety protection device with adjustable coverage of a lead screen, comprising a vertical frame, a flexible lead-coated curtain section, a first adjustment component, and a second adjustment component; the flexible lead-coated curtain section is disposed on the vertical frame, and includes an upper curtain group and a lower curtain group, wherein both the upper and lower curtain groups are composed of multiple lead strips suspended in parallel; the first adjustment component is connected to the lead strips and is used to drive the multiple lead strips to move vertically, and two first adjustment components are provided, corresponding to the upper curtain group and the lower curtain group respectively, so that the bottom center of the upper curtain group bulges downward and the top center of the lower curtain group bulges upward, thereby realizing the adjustment of the curvature of the bottom edge of the upper curtain group and the curvature of the top edge of the lower curtain group, forming an hourglass-shaped projection window that is narrow in the middle and wide at both ends between the upper and lower curtain groups; the second adjustment component is disposed on the first adjustment component, and two second adjustment components are provided, used to drive the upper curtain group and the lower curtain group to move vertically respectively.

[0008] Furthermore, a horizontal frame is fixedly connected to the top of the vertical frame, a base is fixedly connected to the bottom of the vertical frame, and a storage slot is fixedly connected to the top surface of the base.

[0009] Furthermore, the first adjusting component includes a through hole in the outer wall of the lead strip, a connecting component penetrating the through hole, a square frame fixedly disposed on one side of the connecting component, a square rod slidably disposed inside the square frame, a T-shaped rod fixedly installed on the side of the square frame away from the connecting component, a mounting box fixedly installed at the end of the square rod, a groove in the outer wall of the mounting box for the lead strip to pass through, two pressing blocks slidably installed inside the mounting box, and an elastic pressure plate fixedly installed between the two pressing blocks, wherein the elastic pressure plate is in contact with the surfaces of the multiple T-shaped rods.

[0010] Furthermore, the first adjusting component also includes a fixing plate fixedly installed on the outer wall of the mounting box, a limiting groove opened on the outer wall of the fixing plate, and a limiting block fixedly installed on the outer wall of the extrusion block, wherein the limiting block slides inside the limiting groove.

[0011] Furthermore, the first adjusting component also includes a bidirectional threaded rod rotatably installed inside the mounting box, a first motor fixedly installed on the outer wall of the mounting box, and the output shaft of the first motor is fixedly connected to the axial end of the bidirectional threaded rod. The threaded sections at both ends of the bidirectional threaded rod have opposite thread directions, and the inner walls of the two extrusion blocks are respectively threadedly connected to the threaded sections at both ends of the bidirectional threaded rod.

[0012] Furthermore, the first adjusting component located above also includes a return spring sleeved on the wall of the square rod, with one end of the return spring fixedly connected to the top surface of the square frame and the other end of the return spring fixedly connected to the bottom surface of the fixing plate.

[0013] Furthermore, the second adjusting component includes a top plate fixedly installed on the outer wall of the horizontal frame, a support block fixedly installed on the outer wall of the vertical frame, a lead screw rotatably installed on the bottom surface of the top plate, a guide rod fixedly installed on the bottom surface of the top plate, a second motor fixedly installed on the top surface of the top plate, and a connecting block fixedly installed on the side of the mounting box near the vertical frame. The output shaft of the second motor is fixedly connected to the axial end of the lead screw. Two support blocks are provided, one of which has its top surface rotatably connected to the bottom end of the lead screw, and the other has its top surface fixedly connected to the bottom end of the guide rod. Two connecting blocks are provided, one of which has its inner wall threadedly connected to the outer wall of the lead screw, and the other has its inner wall slidably connected to the outer wall of the guide rod.

[0014] Furthermore, the connecting assembly includes a threaded sleeve fixedly installed on the outer wall of the square frame, an adjusting rod threaded inside the threaded sleeve, and an anti-detachment plate fixedly installed on the end of the adjusting rod away from the threaded sleeve.

[0015] Furthermore, guide strips are fixedly connected to the side walls of the lead strips, and protective curtains for shielding the connecting components are fixedly connected to the front walls of the lead strips in the lower section of the curtain assembly.

[0016] The beneficial effects of this invention are: 1. By constructing an hourglass-shaped projection window, the mismatch between the parallel boundaries of traditional rectangular screens and the cone-shaped divergence of X-rays is perfectly solved from a geometric optics perspective. This physically blocks the leakage of edge-scattered rays to the thyroid and gonads, eliminating blind spots in the protection. Through the coordinated operation of the second and first adjustment components, the height of the hourglass-shaped projection window, as well as the curvature of the bottom edge of the upper curtain group and the top edge of the lower curtain group, can be adjusted according to the patient's height and weight, achieving personalized and precise protection.

[0017] 2. By rotating the anti-detachment plate and the adjusting rod, the extension and retraction length of the adjusting rod within the threaded sleeve can be precisely changed. This allows for the disassembly of the adjusting rod, the placement of one or more lead strips on a single threaded sleeve, and finally the reinstallation of the adjusting rod. This enables flexible adjustment of the lead strip thickness or number of layers according to actual usage requirements, increasing the lead equivalent and further attenuating X-rays, thus achieving the effect of flexibly adjusting the lead strip thickness or number of layers based on the X-ray machine's radiation dose. Attached Figure Description

[0018] Figure 1 This is a front perspective view of the entire invention; Figure 2 This is a perspective view of the rear of the entire invention; Figure 3 for Figure 2 A three-dimensional view of the hidden vertical and horizontal frames, where (a) is a three-dimensional view of the upper curtain group and (b) is a three-dimensional view of the lower curtain group. Figure 4This is a schematic diagram of the installation of the upper section curtain assembly in this invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a perspective view of the fixing plate in this invention; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 This is a side view of the elastic pressure plate in this invention; Figure 9 This is a schematic diagram of the installation of the lower section curtain assembly in this invention; Figure 10 This is a schematic diagram of the installation of the guide strip in this invention; Figure 11 This is an exploded view of the through hole and connecting components in this invention.

[0019] In the picture: 101. Horizontal frame; 102. Vertical frame; 103. Base; 104. Storage slot; 105. Lead strip; 201. Through hole; 202. Connecting assembly; 203. Threaded sleeve; 204. Adjusting rod; 205. Anti-detachment plate; 206. Square frame; 207. Square rod; 208. Mounting box; 209. Return spring; 210. T-shaped rod; 211. Extrusion block; 212. Elastic pressure plate; 213. Bidirectional threaded rod; 214. First motor; 215. Fixing plate; 216. Slide groove; 217. Limiting groove; 218. Limiting block; 301. Connecting block; 302. Top plate; 303. Support block; 304. Lead screw; 305. Guide rod; 306. Second motor; 401. Guide strip; 402. Protective curtain. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Example 1, referring to Figures 1-10This invention provides a first embodiment of a safety protection device with adjustable coverage of a lead screen, comprising a vertical frame 102, a flexible lead-plastic curtain section, a first adjusting component, and a second adjusting component. The flexible lead-plastic curtain section is disposed on the vertical frame 102 and includes an upper curtain group and a lower curtain group, wherein both the upper and lower curtain groups are composed of multiple parallel-suspended lead strips 105. The first adjusting component is connected to the lead strips 105 and is used to drive the multiple lead strips 105 to move vertically, and the second adjusting component is... Two adjustment components are provided, corresponding to the upper and lower curtain groups respectively. This causes the bottom center of the upper curtain group to bulge downwards and the top center of the lower curtain group to bulge upwards, thereby adjusting the curvature of the bottom edge of the upper curtain group and the curvature of the top edge of the lower curtain group. This forms an hourglass-shaped projection window that is narrow in the middle and wide at both ends between the upper and lower curtain groups. Two second adjustment components are provided on the first adjustment component, which are used to drive the upper and lower curtain groups to move vertically respectively.

[0022] Specifically, one of the first adjustment components drives multiple lead bars 105 in the middle of the upper curtain group to move downwards, causing the middle of the bottom edge of the upper curtain group to bulge downwards, forming an approximately downward-curving arc edge, thus better conforming to the anatomical position of the lower edge of the thyroid gland in the neck. Similarly, another first adjustment component drives multiple lead bars 105 in the middle of the lower curtain group to move upwards, causing the middle of the top edge of the lower curtain group to bulge upwards, forming an approximately upward-curving arc edge to meet the protection requirements of the upper edge of the gonads in the lower abdomen. By adjusting the curvature of the bottom edge of the upper curtain group and the top edge of the lower curtain group through the first adjustment components, an hourglass-shaped projection window that is narrow in the middle and wide at both ends is formed, effectively blocking the leakage of edge scattered rays to the thyroid gland and gonads, and solving the geometric mismatch problem caused by the straight edges of traditional rectangular windows.

[0023] Reference Figures 1-2 A horizontal frame 101 is fixedly connected to the top of the vertical frame 102, a base 103 is fixedly connected to the bottom of the vertical frame 102, and a storage slot 104 is fixedly connected to the top surface of the base 103.

[0024] Specifically, the base 103 is equipped with casters at the bottom for easy movement of the device. When it is necessary to photograph young children or patients' legs, the lower and upper curtain sections can be lowered, and the storage slot 104 can be used to hold the lower curtain section, effectively improving the flexibility and convenience of using the device.

[0025] Reference Figures 4-9The first adjusting component includes a through hole 201 on the outer wall of the lead strip 105, a connecting component 202 through the through hole 201, a square frame 206 fixedly disposed on one side of the connecting component 202, a square rod 207 slidably disposed inside the square frame 206, a T-shaped rod 210 fixedly installed on the side of the square frame 206 away from the connecting component 202, a mounting box 208 fixedly installed at the end of the square rod 207, a groove 216 on the outer wall of the mounting box 208 for the lead strip 105 to pass through, two pressing blocks 211 slidably installed inside the mounting box 208, and an elastic pressure plate 212 fixedly installed between the two pressing blocks 211, wherein the elastic pressure plate 212 is in contact with the surfaces of the multiple T-shaped rods 210.

[0026] Specifically, each lead bar 105 has a through hole 201 on its outer wall, through which a connecting component 202 passes, thus establishing a stable connection between the lead bar 105 and the first adjusting component. By controlling the two pressing blocks 211 to move in opposite directions, they can simultaneously press the elastic pressure plate 212, causing the elastic pressure plate 212 to undergo elastic deformation and tightly press against multiple T-shaped rods 210, thereby pushing the square frame 206 connected to the T-shaped rods 210 and the connecting component 202 to move. The final thrust acts on the multiple lead bars 105 suspended in parallel, and by controlling the degree of compression, the curvature of the bottom edge of the upper curtain group and the curvature of the top edge of the lower curtain group can be adjusted. This achieves the effect of the middle of the bottom edge of the upper curtain group bulging downwards and the middle of the top edge of the lower curtain group bulging upwards, creating an hourglass-shaped projection window that conforms to the cone-shaped divergence characteristics of X-rays.

[0027] Reference Figures 4-9 The first adjustment component also includes a bidirectional threaded rod 213 rotatably installed inside the mounting box 208 and a first motor 214 fixedly installed on the outer wall of the mounting box 208. The output shaft of the first motor 214 is fixedly connected to the axial end of the bidirectional threaded rod 213. The threaded sections at both ends of the bidirectional threaded rod 213 have opposite thread directions, and the inner walls of the two extrusion blocks 211 are respectively threadedly connected to the threaded sections at both ends of the bidirectional threaded rod 213.

[0028] Specifically, the first motor 214 can be a servo motor or stepper motor commonly used in the prior art. The specific model can be determined according to actual usage requirements and is not limited in this embodiment. When the first motor 214 is started, it drives the bidirectional threaded rod 213 to rotate. Since the thread directions of the threaded sections at both ends of the bidirectional threaded rod 213 are opposite, it can drive the two extrusion blocks 211 to move towards the middle or separate to both sides at the same time, converting the rotational motion into linear motion.

[0029] Reference Figures 6-7The first adjustment component also includes a fixing plate 215 fixedly installed on the outer wall of the mounting box 208, a limiting groove 217 opened on the outer wall of the fixing plate 215, and a limiting block 218 fixedly installed on the outer wall of the extrusion block 211, and the limiting block 218 slides inside the limiting groove 217.

[0030] Specifically, during the movement of the extrusion block 211, the limiting block 218 slides inside the limiting groove 217, effectively preventing the extrusion block 211 from rotating with the bidirectional threaded rod 213, and ensuring that the extrusion block 211 can only move linearly along the axial direction.

[0031] Reference Figures 4-5 The first adjusting component located above also includes a return spring 209 sleeved on the wall of the square rod 207, with one end of the return spring 209 fixedly connected to the top surface of the square frame 206 and the other end of the return spring 209 fixedly connected to the bottom surface of the fixing plate 215.

[0032] Specifically, during the process of the first adjusting component driving the lead strip 105 to adjust the curvature, relative displacement will occur between the lead strips 105. At this time, the return spring 209 is subjected to force and undergoes elastic deformation and stores energy. When the external force is removed, the return spring 209 can assist the square frame 206 to return to the initial relative position, ensuring the restoration accuracy of the edge shape of the lower curtain group and the upper curtain group.

[0033] Reference Figures 1-3 The second adjustment component includes a top plate 302 fixedly installed on the outer wall of the horizontal frame 101, a support block 303 fixedly installed on the outer wall of the vertical frame 102, a lead screw 304 rotatably installed on the bottom surface of the top plate 302, a guide rod 305 fixedly installed on the bottom surface of the top plate 302, a second motor 306 fixedly installed on the top surface of the top plate 302, and a connecting block 301 fixedly installed on the side of the mounting box 208 near the vertical frame 102. The output shaft of the second motor 306 is fixedly connected to the axial end of the lead screw 304. There are two support blocks 303. The top surface of one support block 303 is rotatably connected to the bottom end of the lead screw 304, and the top surface of the other support block 303 is fixedly connected to the bottom end of the guide rod 305. There are two connecting blocks 301. The inner wall of one connecting block 301 is threadedly connected to the outer wall of the lead screw 304, and the inner wall of the other connecting block 301 is slidably connected to the outer wall of the guide rod 305.

[0034] Specifically, the second motor 306 can be a servo motor or stepper motor commonly used in the prior art. The specific model can be determined according to actual usage requirements and is not limited in this embodiment. When the second motor 306 drives the lead screw 304 to rotate, the connecting block 301 threaded to it drives the mounting box 208 to rise and fall vertically. The sliding engagement between the guide rod 305 and the other connecting block 301 plays a limiting and guiding role, preventing the mounting box 208 from deflecting during movement. This allows for smooth and precise adjustment of the vertical height of the hourglass-shaped projection window, ensuring that it is aligned with the center of the chest of patients of different body types. At the same time, the self-locking characteristic of the lead screw 304 itself ensures the stability of the hourglass-shaped projection window position after the device stops moving, improving the safety of clinical operation.

[0035] Example 2, refer to Figures 10-11 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the connecting component 202 includes a threaded sleeve 203 fixedly installed on the outer wall of the square frame 206, an adjusting rod 204 threadedly installed inside the threaded sleeve 203, and an anti-detachment plate 205 fixedly installed on the end of the adjusting rod 204 away from the threaded sleeve 203.

[0036] Specifically, by rotating the anti-detachment plate 205 and the adjusting rod 204, the extension length of the adjusting rod 204 within the threaded sleeve 203 can be precisely changed. This allows for the disassembly of the adjusting rod 204, the placement of one or more lead strips 105 on a single threaded sleeve 203, and finally the reinstallation of the adjusting rod 204. This enables flexible adjustment of the thickness or number of lead strips 105 according to actual usage requirements, increasing the lead equivalent and further attenuating X-rays, thus achieving the effect of flexibly adjusting the thickness or number of lead strips 105 based on the X-ray machine's radiation dose.

[0037] Reference Figure 10 The side wall of the lead strip 105 is fixedly connected to a guide strip 401, and the front wall of the lead strip 105 in the lower curtain assembly is fixedly connected to a protective curtain 402 for shielding the connecting assembly 202.

[0038] Specifically, during frequent lifting and curvature adjustment, adjacent lead bars 105 are prone to twisting or overlapping, resulting in gaps in the shielding layer. The design of the guide bar 401 can effectively increase the lateral rigidity of the lead bars 105, enabling adjacent lead bars 105 to rely on each other and slide in a directional manner during movement.

[0039] The protective curtain 402 is made of lead-containing shielding material, which can effectively cover the area where the connecting component 202 is located and fill the gaps that may be caused by radiation leakage due to the installation through hole 201 and the connecting component 202.

[0040] The remaining structure is the same as that in Example 1.

[0041] Working principle: When in use, this device is located between the X-ray tube and the patient. First, the second motor 306 drives the lead screw 304 to rotate. Under the limiting guidance of the guide rod 305, the connecting block 301 drives the mounting box 208 and the connected lower and upper curtain groups to rise and fall vertically, ensuring that the projection window is directly facing the center of the chest of patients of different body types.

[0042] Subsequently, the first motor 214 drives the bidirectional threaded rod 213 to rotate, driving the two compression blocks 211 to move in opposite or opposing directions. The two compression blocks 211 compress the elastic pressure plate 212 between them, causing elastic deformation. The deformed elastic pressure plate 212 compresses multiple T-shaped rods 210, and the thrust is transmitted to multiple lead bars 105 through the square frame 206 and connecting assembly 202. Because the displacement of the lead bar 105 in the middle is greater than that on both sides, the bottom center of the upper curtain group bulges downward, and the top center of the lower curtain group bulges upward, thus creating an hourglass-shaped projection window that is narrow in the middle and wide at both ends between the upper and lower curtain groups. This shape precisely matches the conical divergence path of the X-ray beam, achieving dynamic shielding of sensitive organs in non-irradiated areas. By controlling the degree of compression, the curvature of the bottom edge of the upper curtain group and the curvature of the top edge of the lower curtain group can be adjusted, further improving the flexibility and convenience of the device during use.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A safety protection device with adjustable coverage area for a lead screen, characterized in that, Includes a vertical frame (102), a flexible lead-coated curtain section, a first adjustment component, and a second adjustment component; The flexible lead-coated curtain section is set on the vertical frame (102). The flexible lead-coated curtain section includes an upper curtain group and a lower curtain group, wherein the upper curtain group and the lower curtain group are both composed of multiple parallel suspended lead strips (105). The first adjustment component is connected to the lead strip (105) and is used to drive multiple lead strips (105) to move in the vertical direction. There are two first adjustment components, which correspond to the upper curtain group and the lower curtain group respectively. This causes the bottom edge of the upper curtain group to bulge downward and the top edge of the lower curtain group to bulge upward, thereby adjusting the curvature of the bottom edge of the upper curtain group and the curvature of the top edge of the lower curtain group. This forms an hourglass-shaped projection window that is narrow in the middle and wide at both ends between the upper curtain group and the lower curtain group. The second adjustment component is disposed on the first adjustment component, and there are two second adjustment components, which are used to drive the upper section curtain assembly and the lower section curtain assembly to move in the vertical direction respectively.

2. The lead screen with adjustable coverage area as described in claim 1, characterized in that: The top of the vertical frame (102) is fixedly connected to a horizontal frame (101), the bottom of the vertical frame (102) is fixedly connected to a base (103), and the top surface of the base (103) is fixedly connected to a storage groove (104).

3. The lead screen with adjustable coverage area as described in claim 1, characterized in that: The first adjusting component includes a through hole (201) on the outer wall of the lead strip (105), a connecting component (202) penetrating the inside of the through hole (201), a square frame (206) fixedly disposed on one side of the connecting component (202), a square rod (207) slidably disposed inside the square frame (206), a T-shaped rod (210) fixedly installed on the side of the square frame (206) away from the connecting component (202), a mounting box (208) fixedly installed at the end of the square rod (207), a groove (216) on the outer wall of the mounting box (208) for the lead strip (105) to pass through, two pressing blocks (211) slidably installed inside the mounting box (208), and an elastic pressure plate (212) fixedly installed between the two pressing blocks (211), and the elastic pressure plate (212) is in contact with the surface of the multiple T-shaped rods (210).

4. The lead screen with adjustable coverage area as described in claim 3, characterized in that: The first adjustment component also includes a fixing plate (215) fixedly installed on the outer wall of the mounting box (208), a limiting groove (217) opened on the outer wall of the fixing plate (215), and a limiting block (218) fixedly installed on the outer wall of the extrusion block (211), and the limiting block (218) slides inside the limiting groove (217).

5. The lead screen with adjustable coverage area as described in claim 4, characterized in that: The first adjustment component also includes a bidirectional threaded rod (213) rotatably installed inside the mounting box (208) and a first motor (214) fixedly installed on the outer wall of the mounting box (208). The output shaft of the first motor (214) is fixedly connected to the axial end of the bidirectional threaded rod (213). The threaded sections at both ends of the bidirectional threaded rod (213) have opposite thread directions, and the inner walls of the two extrusion blocks (211) are respectively threadedly connected to the threaded sections at both ends of the bidirectional threaded rod (213).

6. The lead screen with adjustable coverage area as described in claim 5, characterized in that: The first adjustment component located above also includes a return spring (209) sleeved on the wall of the square rod (207), and one end of the return spring (209) is fixedly connected to the top surface of the square frame (206), and the other end of the return spring (209) is fixedly connected to the bottom surface of the fixing plate (215).

7. The lead screen with adjustable coverage area as described in claim 3, characterized in that: The second adjusting component includes a top plate (302) fixedly installed on the outer wall of the horizontal frame (101), a support block (303) fixedly installed on the outer wall of the vertical frame (102), a lead screw (304) rotatably installed on the bottom surface of the top plate (302), a guide rod (305) fixedly installed on the bottom surface of the top plate (302), a second motor (306) fixedly installed on the top surface of the top plate (302), and a connecting block (301) fixedly installed on the side of the mounting box (208) near the vertical frame (102). 6) The output shaft is fixedly connected to the axial end of the lead screw (304). There are two support blocks (303). The top surface of one support block (303) is rotatably connected to the bottom end of the lead screw (304), and the top surface of the other support block (303) is fixedly connected to the bottom end of the guide rod (305). There are two connecting blocks (301). The inner wall of one connecting block (301) is threadedly connected to the outer wall of the lead screw (304), and the inner wall of the other connecting block (301) is slidably connected to the outer wall of the guide rod (305).

8. The lead screen with adjustable coverage area as described in claim 3, characterized in that: The connecting assembly (202) includes a threaded sleeve (203) fixedly installed on the outer wall of the square frame (206), an adjusting rod (204) threaded inside the threaded sleeve (203), and an anti-detachment plate (205) fixedly installed on the end of the adjusting rod (204) away from the threaded sleeve (203).

9. The lead screen with adjustable coverage area as described in claim 8, characterized in that: The side wall of the lead strip (105) is fixedly connected to a guide strip (401), and the front wall of the lead strip (105) in the lower section curtain group is fixedly connected to a protective curtain (402) for shielding the connecting assembly (202).

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