Corrugated electronic beam radiotherapy field manual lead shield device

Abstract

The present invention provides a corrugated type manual lead stop device for electron beam radiotherapy field, which is composed of a convex clamp, a light-limiting tube, four supporting legs, four groups of corrugated components and four corner columns. The present invention uses two groups of light stop components in non-same planes to achieve the hollow shape of irregular fields; the screw displacement is used to accurately apply pressure; the rotation of the eccentric cylinder is used to form torques of varying lengths to achieve the upper and lower braking of the entire pin. The device of the present invention is reliable and environmentally friendly; the entire operation process is simple and easy when in use, and is suitable for the promotion and application of clinical electron beam radiotherapy of body surface parts.

Description

Technical Field

[0001] The invention belongs to radiotherapy auxiliary tools, and relates to a (manual) mechanical device for forming a special-shaped irradiation field in electron beam radiotherapy, and in particular to a corrugated electron beam radiotherapy field manual lead shield device, which is suitable for body surface electron beam irradiation. Background Art

[0002] Electron beam irradiation technology: also known as electron beam irradiation, which is to use electron beams to treat tumors. It is one of the radiotherapy methods. The range of electron beams is short and clear. Clinically, it is often used to treat superficial tumors with a depth of 5 cm or less, such as electron beam irradiation of the chest wall of breast cancer patients and electron beam irradiation after superficial lymph node dissection.

[0003] Irradiation field: A professional term related to radiotherapy, which refers to the area irradiated by the radiation. The radiation therapy machine emits radiation through the skin to reach the patient's lesion. The irradiation area left on the skin is the irradiation field. When using electron beam irradiation, this field is called the electron beam irradiation field. The determination of the surface electron beam irradiation field (boundary) is usually done by using a simulator (or CT positioning machine) to simulate the actual machine parameters, lesion depth and range, and using light to simulate the electron beam. The light area that falls on the surface of the body is the actual irradiation area of ​​the electron beam during formal treatment. The doctor uses a marker to outline the boundary on the patient's body surface, and the irradiated area in the future will use this as the boundary. The shape of the irradiation field varies depending on the location of the lesion, and most of them are regular right-angled polygonal shapes. Among them, the chest wall electron beam irradiation field of breast cancer patients is generally square in shape, with the upper and lower boundaries of the irradiation field being horizontal, and the left and right boundaries appearing as broken lines ("right-angle curves"), so generally the upper and lower boundaries need to be horizontally blocked in pieces, and the left and right boundaries need to be partially blocked. The molding of other irregular electron beam fields is very laborious and requires special mold equipment, etc. The commonly used methods are as follows:

[0004] 1. Lead sheet splicing and shielding. Simply put, it is to use radiopaque lead sheet to block the shape of the output field. When irradiating with electron beams, a four-sided cylindrical electron beam light-limiting tube must be used. The tube is installed directly below the head of the machine (that is, the outlet of the electron beam). The order of electron beam penetration from top to bottom is: head → light-limiting tube → skin. Four metal columns are emitted from the bottom edge of the electronic light-limiting tube and connected to a quadrilateral metal ring (called a platform ring). Turn on the simulated light field of the machine (simulated electron beam). At this time, the light will pass through the light-limiting tube and produce a square projection on the body surface. The first method: The radiotherapy technician will place a long strip of lead sheet on the platform ring at the bottom of the light-limiting tube according to the boundary mark of the patient's body surface to block the light, and the projection generated will be consistent with the marked boundary. Or use the second method: The radiotherapy technician covers the patient's body surface with lead sheet along the boundary mark line, and blocks the area outside the radiation field with lead sheet. The defects are as follows:

[0005] 1. Disadvantages of covering the body surface with lead sheet: the lead sheet may slip off during irradiation, causing radiotherapy accidents that damage normal tissues;

[0006] 2. The lead sheet placed on the platform ring slips off during irradiation, causing radiotherapy accidents that damage normal tissues;

[0007] 3. The accuracy of irregular field shapes depends on the shape and specifications of the lead stop;

[0008] 4. The formation of irregular field of view is a great test of the technician's operation level and professional ethics. Multiple or few blocks cannot be effectively monitored;

[0009] 5. The number of irradiation times determines the number of splicing times, which is time-consuming and laborious. The speed of forming irregular radiation fields depends on the proficiency of the technicians.

[0010] 2. Individualized negative mold lead blocking: Simply put, it is to use radiopaque lead to block the shape of the output field, and fix each lead sheet to form a whole. First use light to simulate the electronic wire, and place a piece of PVC on the platform circle at the bottom edge of the light-limiting tube. The radiation therapy technician will mark the boundaries of the patient's body surface and place a long strip of lead on the PVC to block the light. The resulting projection will be consistent with the marked boundary. Draw the boundary on the PVC along the inner edge of the lead sheet. At this time, the figure drawn on the PVC is the shape of the lead positive mold. The cast matching lead negative mold is the individualized electronic wire lead blocking. Place the negative mold lead blocking sheet on the platform circle each time you use it. Defects:

[0011] 1. The process is cumbersome and requires the production of positive and negative mold lead sheets;

[0012] 2. When casting low-melting-point lead, lead vapor is easily volatilized, which pollutes the environment. Operators need to do a good job of self-protection;

[0013] 3. Low-melting-point lead is easy to precipitate during each use, and patients are prone to heavy metal poisoning;

[0014] 4. The implementation of treatment depends entirely on the technician's operating level and professional ethics, and lacks relevant mechanical chain constraints. Summary of the invention

[0015] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a corrugated type manual lead shield device for electron beam radiotherapy field, which is suitable for electron beam irradiation of patients. The device is composed of a clamping protrusion 23, a light limiting tube 24, four supporting feet 25, four groups of corrugated components 26 and four corner columns 27. The four groups of corrugated components 26 are arranged in parallel and opposite to each other to form a quadrilateral, and the components are connected through the corner columns 27. The corner column 27 is a cubic structure, and two adjacent side surfaces are respectively connected to a corrugated component 26, and the remaining two side surfaces are free. Two relatively arranged corrugated components 26 are a pair, such as the two groups of corrugated components 26 on the left and right sides are A pairs, which are connected to the lower part of the side of the corner column 27 and are flush with the bottom surface of the corner column 27. The remaining two groups of corrugated components 26 are B pairs, which are connected to the upper part of the side of the corner column 27 and are flush with the upper surface of the corner column 27. The A pair and the B pair are not in the same plane. Support legs 25 extend obliquely upward and centripetally from the central position of the upper surface of the four corner columns 27, and the ends are connected to the lower parts of the four corners of the light-limiting tube 24. The light-limiting tube 24 is a quadrilateral tube structure, and a circle of protrusions 23 extend outward from the four sides of the upper edge, and the lower edge of the light-limiting tube 24 is free. The lower edge of the quadrilateral inner wall of the light-limiting tube 24 faces the quadrilateral surrounded by the four groups of corrugated components 26, and the size of the quadrilateral inner wall of the light-limiting tube 24 is slightly smaller than the size of the quadrilateral surrounded by the four groups of corrugated components 26.

[0016] The corrugated assembly 26 is composed of 7 groups of single tile assemblies 28 and a group of edge tile assemblies 29. The 7 groups of single tile assemblies 28 are arranged side by side, and the edge tile assembly 29 is located at the head end. The specific combination method will be described later.

[0017] The side tile assembly 29 is composed of a screw locking assembly 30, a pinball assembly 31, a resistance point 32, a support platform 33, a tile plate 34, a semicircular groove 35 and a handle 36. The entire device presents a tower structure with upper, middle and lower parts, and from bottom to top are the support platform 33, the tile plate 34, the semicircular groove 35, the pinball assembly 31 and the screw locking assembly 30. The upper surface of the support platform 33 has a slope, and the left side is higher than the right side. The bottom surface of the support platform 33 is square and horizontal, and the four sides of the support platform 33 are perpendicular to the bottom surface. The tile plate 34 is a sheet structure with a certain thickness, presenting a parallelogram shape, with the upper and lower surfaces parallel to each other, and the left and right sides parallel to each other. The tile plate 34 is attached to the upper surface of the support platform 33. The left and right side edges of the tile plate 34 are flush with the left and right side edges of the support platform 33. The semicircular groove 35 is a semicircular groove formed by the depression of the upper surface along the long axis of the shim plate 34, and is located just above the left and right midlines of the shim platform 33. The cylindrical resistance point 32 is located at the front end of the semicircular groove 35, the outer edge of the resistance point 32 is flush with the front end of the semicircular groove 35, and the upper surface of the resistance point 32 is flush with the shim plate 34. The cylindrical handle 36 is located at the rear end of the semicircular groove 35, and the outer edge of the handle 36 is flush with the rear end of the semicircular groove.

[0018] The pinball assembly 31 is in contact with the semicircular groove 35. The pinball assembly 31 is composed of a top plate 37, a limiting groove 38, a spring 39, an upper limit screw 40, a pressure rod 41, a ball bowl 42, a sliding ball 43 and a telescopic cylinder 44. The telescopic cylinder 44 is a hollow cylindrical structure, with the upper end fixedly connected to the disc structure top plate 37 and the lower end free. The side wall surface of the telescopic cylinder 44 is provided with a long strip of limiting groove 38, which passes through the entire layer of the side wall of the telescopic cylinder 44 and opens on the inner wall. The spring 39 is located in the telescopic cylinder 44, with the upper end abutting against the top plate 37 and the lower end abutting against the cylindrical pressure rod 41. The diameter of the upper surface of the cylindrical pressure rod 41 is slightly smaller than the inner diameter of the telescopic cylinder 44, so that the pressure rod 41 can move up and down in the telescopic cylinder 44. The upper limit screw 40 is screwed to the side wall of the pressure rod 41 and moves in the limit groove 38, wherein the outer edge of the upper limit screw 40 exceeds the outer edge of the limit groove 38 and is in a free state, and the upper limit screw 40 moves together with the pressure rod 41. The lower end of the pressure rod 41 is connected to the ball bowl 42, and the ball bowl 42 is a bowl-shaped structure in an inverted shape. The spherical sliding ball 43 is located in the ball bowl 42, and the outer size of the sliding ball 43 matches the inner diameter of the ball bowl 42. The sliding ball 43 can slide and roll freely in the ball bowl 42. The bottom end of the sliding ball 43 contacts the semicircular groove 35, and the size of the sliding ball 43 matches the inner diameter of the semicircular groove 35. The sliding ball 43 can run along the semicircular groove 35.

[0019] Connected to the upper surface of the top plate 37 is a screw locking assembly 30. The screw locking assembly 30 is composed of a knob 1, a pin hole 2, a pressure window 3, a screw 4, a screw hole 5, a tapered hole 6, a screw seat 7, a cone 8, a lower limit circle 9, a knob pattern 10, an eccentric lock assembly 11, a pin pattern 12, a pin 13 and an upper limit circle 14. The screw hole 5 is opened in the center of the square screw seat 7, and the screw hole 5 penetrates the entire layer of the screw seat 7, and the inner wall of the screw hole 5 is covered with threads. The tapered hole 6 is a nearly rectangular hole formed by the depression on the upper surface of the screw seat 7, and the two ends of the tapered hole 6 are arc-shaped and connected by parallel lines in the middle. There are 24 tapered holes 6, which are evenly radiated outward into a regular circle with the screw hole 5 (center) as the center of the circle (each hole is equidistant from left to right). The major axis of each tapered hole 6 (i.e., the line connecting the two ends) points to the center of the screw hole 5. The side wall of the cylindrical screw 4 is covered with threads, which match the threads on the inner wall of the screw hole 5. The screw 4 can rotate freely in the screw hole 5 through the threads. The lower end of the screw 4 is free, and the upper end of the screw 4 is sleeved with the knob 1 and the upper surface is flush. The knob 1 is a ring-shaped columnar structure, the diameter of the knob 1 is larger than the diameter of the screw 4, and the knob 1 and the screw 4 are fixedly connected. A vertical through hole pin hole 2 is opened on the annular upper surface of the knob 1, and the pin hole 2 penetrates the entire layer of the knob 1 and opens a hole on the lower surface of the knob 1. The pin hole 2 is directly below the middle of the tapered hole 6. The upper and lower middle positions of the side wall of the knob 1 are recessed inward to form a rectangular pressing window 3, which extends inward and penetrates the pin hole 2. The side of the knob 1 is covered with knob patterns 10. The cylindrical pin 13 can rotate and move up and down in the pin hole 2. The upper end of the pin 13 is sleeved with the upper limit ring 14 and the upper surface is flush, and the diameter of the upper limit ring 14 is larger than the diameter of the pin hole 2. The lower end of the pin 13 is sleeved with the lower limit ring 9 and the lower surface is flush, and the diameter of the lower limit ring 9 is greater than the diameter of the pin hole 2. The diameter of the lower limit ring 9 is greater than the short diameter of the tapered hole 6. The cone 8 of the cone is connected to the bottom surface of the lower end of the pin 13, and the diameter of the circular surface of the cone 8 is consistent with the diameter of the pin 13. The diameter of the circular surface of the cone 8 is greater than the shortest diameter of the tapered hole 6 and the tip of the cone 8 can fall into the tapered hole 6. The pin 13 is covered with pin marks 13. The middle of the outer edges of both sides of the pressing window 3 is connected with an eccentric lock assembly 11, and the specific connection method is described later. The eccentric lock assembly 11 is composed of a bean sprout seat A15, a bean sprout seat B16, a pressure flap 17, an eccentric shaft 18, an axial hole B19, an eccentric circle 20, a round tooth 21 and an axial hole A22. The eccentric circle 20 is a right cylindrical shape, and the side surface is two right circular surfaces. The eccentric shaft 18 extends to the left and right sides at the eccentric 1 / 2 radius of the two circular surfaces of the eccentric circle 20. The bean sprout seat A15 has a through hole shaft hole A22 on the side, and the bean sprout seat B16 has a through hole shaft hole B19 on the side. The bean sprout seat A15 and the bean sprout seat B16 are paired structures with the same size and are parallel to each other. The shaft hole B19 and the shaft hole A22 are opposite. The two ends of the eccentric shaft 18 rotate freely in the shaft hole B19 and the shaft hole A22, that is, the eccentric circle 20 rotates between the bean sprout seat A15 and the bean sprout seat B16. The arc-shaped pressure flap 17 is emitted from the tangent line on the cylindrical side of the eccentric circle 20, just behind the shaft root of the eccentric shaft 18.When the axial root of the eccentric shaft 18 and the root of the pressure flap 17 are both in a horizontal state, the drooping line at the end of the pressure flap 17 just passes through the center of the eccentric shaft 18. The left and right side surfaces of the pressure flap 17 are flush with the left and right circular side surfaces of the eccentric circle 20. The side surfaces of the column of the eccentric circle 20 are covered with round teeth 21. The backs of the bean sprout seat A15 and the bean sprout seat B16 are respectively connected to the middle of the outer edges of both sides of the pressure window 3. The inner surfaces of the bean sprout seat A15 and the bean sprout seat B16 are flush with the edges of the pressure window 3. That is, the eccentric circle 20 can freely enter and exit the pressure window 3, and the round teeth 21 contact the pin pattern 12. The bottom end of the screw 4 is connected to the upper surface of the top plate 37.

[0020] The single tile assembly 28 is composed of a screw locking assembly 30, a pinball assembly 31, a resistance point 32, a tile support platform 33, a semicircular groove 35 and a tile cover plate 45. The composition and structural relationship are similar to those of the edge tile assembly 29. The only difference is the tile cover plate 45, that is, the position relationship of the flush tile plate 34 in the edge tile assembly 29 is replaced by the tile cover plate 45. The left edge of the tile cover plate 45 exceeds the left side wall of the tile support platform 33. The remaining structures on the tile cover plate 45 are consistent with the flush tile plate 34.

[0021] The corrugated assembly 26 is composed of 7 groups of single tile assemblies 28 and a group of edge tile assemblies 29. The 7 groups of single tile assemblies 28 are arranged side by side, and the edge tile assemblies 29 are located at the head end. The way in which a group of edge tile assemblies 29 and the 7 groups of single tile assemblies 28 are combined with each other is that the sides of the screw seats 7 of adjacent single tile assemblies 28 (or edge tile assemblies 29) are fixedly connected, and the upper and lower surfaces of the two are kept horizontal, that is, the screw seats 7 of a group of edge tile assemblies 29 and the 7 groups of single tile assemblies 28 form an integral plane. The side (the side with a low slope) of the flush tile plate 34 of the single tile assembly 28 (or the side with a high slope) contacts the side (the side with a high slope) of the tile support platform 33 of the adjacent single tile assembly 28 and can slide against each other. The sides of the tile support platforms 33 of the adjacent single tile assemblies 28 (or edge tile assemblies 29) are fixedly connected, and the lower surfaces of the two are kept flush. Except that the side edge (the side with higher slope) of the flush tile plate 34 of the side tile assembly 29 at the head end is flush with the side edge of the tile support platform 33 below, the side edges (the side with higher slope) of the tiling plates 45 of the remaining 7 groups of single tile assemblies 28 all exceed the side edges of the tile support platforms 33 below them. The protruding portion of each tiling plate 45 will overlap the adjacent flush tile plates 34 up and down, which will be used for the connection and shielding between adjacent tiling plates 45 or between (tiling plates 45 and flush tile plates 34).

[0022] Four groups of corrugated components 26 are arranged in parallel and opposite to each other to form a quadrilateral, and the components are connected by corner columns 27. The corner columns 27 are cubic structures, and two adjacent sides are connected to a corrugated component 26, and the remaining two sides are free. Two corrugated components 26 arranged opposite to each other are a pair, such as the two groups of corrugated components 26 on the left and right sides are pair A, and the remaining two groups are pair B. Pair A and pair B are not in the same plane. The connection method of the corrugated components 26 and corner columns 27 in pair A is as follows: the corrugated components 26 are connected to the corner columns 27 through the side tile components 29 at the head end and the single tile components 28 at the tail end. The side of the screw seat 7 of the edge tile assembly 29 at the head end is connected to the side of the corner column 27 and the upper surfaces of the two are kept flush, the side of the flush tile plate 34 (the side with a higher slope) contacts the side of the corner column 27 and can slide against each other, the side of the tile support 33 (the side with a higher slope) is connected to the side of the corner column 27 and the lower surface of the corner column 27 exceeds the lower surface of the tile support 33. The side of the screw seat 7 of the single tile assembly 28 at the tail end is connected to the side of the corner column 27 and the upper surfaces of the two are kept flush, the side of the shingle plate 45 (the side with a lower slope) contacts the side of the corner column 27 and can slide against each other, the side of the tile support 33 (the side with a lower slope) is connected to the side of the corner column 27 and the lower surface of the corner column 27 exceeds the lower surface of the tile support 33. The connection method of the corrugated component 26 and the corner column 27 in the B pair is as follows: the corrugated component 26 is connected to the corner column 27 through the side tile component 29 at the head end and the single tile component 28 at the tail end. The side of the screw seat 7 of the side tile component 29 at the head end is connected to the side of the corner column 27 and the upper surface of the corner column 27 exceeds the upper surface of the screw seat 7, the side of the flush tile plate 34 (the side with a higher slope) contacts the side of the corner column 27 and can slide with each other, and the side of the tile support platform 33 (the side with a higher slope) is connected to the side of the corner column 27 and the lower surfaces of the two remain flush. The side of the screw seat 7 of the single tile component 28 at the tail end is connected to the side of the corner column 27 and the upper surface of the corner column 27 exceeds the upper surface of the screw seat 7, the side of the shingle plate 45 (the side with a lower slope) contacts the side of the corner column 27 and can slide with each other, and the side of the tile support platform 33 (the side with a lower slope) is connected to the side of the corner column 27 and the lower surfaces of the two remain flush. Pair A and pair B are in different planes.

[0023] Based on the many deficiencies reflected in the two methods listed in the background technology, the present invention provides a device for realizing field shaping by controlling the light-sensitive lead stop. The present invention uses two sets of light stop components in non-same planes to realize the hollow shape of irregular fields; the screw displacement is used for the precise application of pressure; the rotation of the eccentric cylinder is used to form torques of varying lengths to achieve the upper and lower braking of the entire pin. The mechanical device is reliable and environmentally friendly; the entire operation process is simple and easy during use, and is suitable for the promotion and application of clinical treatment of electronic beam radiation on body surface parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a side structural schematic diagram of the present invention.

[0026] Figure 3 It is a schematic diagram of the top structure of the present invention.

[0027] Figure 4 It is a schematic diagram of the bottom structure of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure of the corrugated component 26.

[0029] Figure 6 It is a schematic structural diagram of the side view of the corrugated component 26.

[0030] Figure 7 It is a schematic structural diagram of the corrugated component 26 from the rear view.

[0031] Figure 8 It is a schematic structural diagram of the edge tile assembly 29.

[0032] Fig. 9 It is a schematic diagram of the side view of the edge tile assembly 29.

[0033] Fig.10 It is a schematic diagram of the exploded structure of the components of the edge tile assembly 29.

[0034] Fig.11 It is a schematic diagram of the bottom structure of the edge tile assembly 29 components.

[0035] Fig.12 It is a schematic diagram of the structure of the pinball assembly 31.

[0036] Fig.13 It is a schematic diagram of the bottom structure of the pinball assembly 31.

[0037] Fig.14 It is a schematic diagram of the exploded structure of the pinball assembly 31.

[0038] Fig.15 2 is a schematic diagram of the structure of the screw locking assembly 30 .

[0039] Fig.16 2 is a schematic diagram of the bottom structure of the screw locking assembly 30.

[0040] Fig.17 It is an exploded view of the “eccentric lock assembly 11 ” and the knob 1 .

[0041] Fig.18 It is a front structural schematic diagram of the "eccentric lock assembly 11".

[0042] Fig.19 It is a schematic structural diagram of the "eccentric lock assembly 11" in a side view.

[0043] Fig. 20 It is a schematic diagram of the structure of the "eccentric lock assembly 11" in front and side views.

[0044] Fig.21 This is a diagram showing the combination of "bean sprout seat A15 and bean sprout seat B16" and knob 1.

[0045] Fig. 22 It is a schematic diagram of the structure when the pressure flap 17 is at the bottom (unlocked state).

[0046] Fig.23 It is a schematic diagram of the structure with the pressure flap 17 at the top (locked state).

[0047] Fig.24 It is the torque relationship diagram between the pin 13 and the eccentric circle 20.

[0048] Fig.25 It is the force analysis diagram of cone 8 and tapered hole 6.

[0049] Fig.26 It is a position relationship diagram of the detailed structural parts of the edge tile assembly 29.

[0050] Fig. 27 It is a schematic diagram of the structure of a single-tile assembly 28.

[0051] Fig.28 It is a schematic diagram of the front and side structure of a single-tile assembly 28.

[0052] Fig.29 It is a detailed structural diagram of the components of the corrugated assembly 26.

[0053] Fig.30 It is a schematic diagram of the connection structure of the corrugated component 26 in the center of A and the corner columns 27 on both sides.

[0054] Fig.31 It is a schematic diagram of the connection structure between the corrugated component 26 in the B pair and the corner columns 27 on both sides.

[0055] Fig.32 It is a schematic diagram of the connection structure of two adjacent groups of corrugated components 26 and corner columns 27.

[0056] Fig.33 It is a schematic diagram of the use (starting) of the present invention.

[0057] Fig.34 It is a schematic diagram of the present invention (the tiling plate 45 and the tiling plate 34 are combined into a radiation field shape).

[0058] Fig.35 It is a schematic diagram of the use (final effect) of the present invention. DETAILED DESCRIPTION

[0059] The present invention is further described in conjunction with the accompanying drawings and embodiments.

[0060] Example 1 Corrugated electronic beam radiotherapy field manual lead shield device

[0061] Reference Figure 1 , Figure 2 and Figure 3 The purpose of the present invention is to overcome the shortcomings of the prior art and provide a manual mechanical device for forming a special-shaped irradiation field in electron beam radiotherapy, which is suitable for electron beam irradiation of patients. The device is composed of a convex 23, a light-limiting tube 24, four supporting feet 25, four groups of corrugated components 26 and four corner columns 27. The four groups of corrugated components 26 are arranged in parallel and opposite to each other to form a quadrilateral, and the components are connected through the corner columns 27. The corner column 27 is a cubic structure, and two adjacent side surfaces are respectively connected to a corrugated component 26, and the remaining two side surfaces are free. Two relatively arranged corrugated components 26 are a pair, such as the two groups of corrugated components 26 on the left and right sides are A pairs, which are connected to the lower part of the side of the corner column 27 and are flush with the bottom surface of the corner column 27. The remaining two groups of corrugated components 26 are B pairs, which are connected to the upper part of the side of the corner column 27 and are flush with the upper surface of the corner column 27. The A pair and the B pair are not in the same plane. The central position of the upper surface of the four corner columns 27 extends outwardly from the support feet 25, and the ends are connected to the lower parts of the four corners of the light limiting tube 24. The light limiting tube 24 is a four-sided cylindrical structure, and a circle of protrusions 23 extend outward from the four sides of the upper edge, and the lower edge of the light limiting tube 24 is free. Figure 4 The lower edge of the quadrilateral inner wall of the light-limiting tube 24 faces the quadrilateral formed by the four groups of corrugated components 26, and the size of the inner wall quadrilateral of the light-limiting tube 24 is slightly smaller than the size of the quadrilateral formed by the four groups of corrugated components 26. The function of the light-limiting tube 24 is to limit and shape the beam direction, so that the size of the beam coming out from the lower edge of the light-limiting tube 24 is consistent with the inner diameter of the tube and is a vertical beam. The size of the clamping protrusion 23 is compatible with the groove on the machine head, and can be fixed and locked on the machine head to complete the connection with the machine head.

[0062] Reference Figure 5 , Figure 6 and Figure 7 , wherein the corrugated assembly 26 is composed of 7 groups of single tile assemblies 28 and a group of edge tile assemblies 29. The 7 groups of single tile assemblies 28 are arranged side by side, and the edge tile assembly 29 is located at the head end. The specific combination method will be described later.

[0063] Reference Figure 8The side tile assembly 29 is composed of a screw locking assembly 30, a ball assembly 31, a resistance point 32, a tile support platform 33, a tile plate 34, a semicircular groove 35 and a handle 36. The entire device presents a tower structure with upper, middle and lower parts, including the tile support platform 33, the tile plate 34, the semicircular groove 35, the ball assembly 31 and the screw locking assembly 30 from bottom to top. Fig. 9 The upper surface of the support platform 33 has a slope, with the left side higher than the right side. The bottom surface of the support platform 33 is square and horizontal, and the four sides of the support platform 33 are perpendicular to the bottom surface. The tile plate 34 is a sheet structure with a certain thickness, presenting a parallelogram shape, with the upper and lower surfaces parallel to each other, and the left and right sides parallel to each other. The tile plate 34 is attached to the upper surface of the support platform 33. The left and right side edges of the tile plate 34 are flush with the left and right side edges of the support platform 33. Fig.10 and Fig.11 , wherein the semicircular groove 35 is a semicircular groove formed by the depression on the upper surface along the long axis of the shim plate 34, and the semicircular groove 35 is located just above the center line of the left and right sides of the support platform 33. The cylindrical resistance point 32 is located at the front end of the semicircular groove 35, and the outer edge of the resistance point 32 is flush with the front end edge of the semicircular groove 35, and the upper surface of the resistance point 32 is flush with the shim plate 34. The cylindrical handle 36 is located at the rear end of the semicircular groove 35, and the outer edge of the handle 36 is flush with the rear end edge of the semicircular groove. The function of the resistance point 32 is to prevent the front end range of the shim plate 34 from moving. The handle 36 is the fulcrum for the hand to push and pull the shim plate 34 to move forward and backward, and serves to prevent the rear end range of the shim plate 34 from moving. The connection method of other parts of the edge shoe assembly 29 will be described later.

[0064] Reference Fig.10 and Fig.11 , the pinball assembly 31 is in contact with the semicircular groove 35. Fig.12 The pinball assembly 31 is composed of a top plate 37, a limit groove 38, a spring 39, an upper limit screw 40, a pressure rod 41, a ball bowl 42, a sliding ball 43 and a telescopic cylinder 44. Fig.13 and Fig.14The telescopic cylinder 44 is a hollow cylindrical structure, with the upper end fixedly connected to the disc structure top plate 37 and the lower end free. The side wall surface of the telescopic cylinder 44 is provided with a long strip of limiting groove 38, which penetrates the entire side wall of the telescopic cylinder 44 and opens at the inner wall. The spring 39 is located in the telescopic cylinder 44, with the upper end abutting against the top plate 37 and the lower end abutting against the cylindrical pressure rod 41. The upper surface diameter of the cylindrical pressure rod 41 is slightly smaller than the inner diameter of the telescopic cylinder 44, so that the pressure rod 41 can move up and down in the telescopic cylinder 44. The upper limit screw 40 is screwed to the side wall of the pressure rod 41 and deformed in the limiting groove 38, wherein the outer edge of the upper limit screw 40 exceeds the outer edge of the limiting groove 38 and is free, and the upper limit screw 40 moves together with the pressure rod 41. The elastic force of the spring 39 acts on the lower surface of the top plate 37 and the upper surface of the pressure rod 41, so that both maintain elastic potential energy. The upper limit screw 40 is a stop point to prevent the telescopic cylinder 44 from sliding up. The lower end of the pressure rod 41 is connected to the ball bowl 42, which is a bowl-shaped structure in an inverted shape. The spherical sliding ball 43 is located in the ball bowl 42, and the outer dimensions of the sliding ball 43 match the inner diameter of the ball bowl 42. The sliding ball 43 can slide and roll freely in the ball bowl 42. The bottom end of the sliding ball 43 contacts the semicircular groove 35, and the size of the sliding ball 43 matches the inner diameter of the semicircular groove 35. The sliding ball 43 can run along the semicircular groove 35. The pinball assembly 31 is in sliding contact with the semicircular groove 35 through the sliding ball 43, and the pinball assembly 31 can only slide back and forth through the semicircular groove 35 as a track.

[0065] Reference Fig.10 and Fig.11 , connected to the upper surface of the top plate 37 is a screw locking assembly 30. Fig.15 and Fig.16The purpose of the present invention is to provide a gravity pin-drop screw thread locking device for an electron beam radiotherapy field shaping device. The device consists of a knob 1, a pin hole 2, a pressure window 3, a screw 4, a screw hole 5, a tapered hole 6, a screw seat 7, a cone 8, a lower limit circle 9, a knob pattern 10, an eccentric lock assembly 11, a pin pattern 12, a pin 13 and an upper limit circle 14. A screw hole 5 is opened in the center of the square screw seat 7, and the screw hole 5 passes through the entire layer of the screw seat 7, and the inner wall of the screw hole 5 is covered with threads. The tapered hole 6 is a nearly rectangular hole formed by the depression on the upper surface of the screw seat 7, and the two ends of the tapered hole 6 are arc-shaped and connected by parallel lines in the middle. There are 24 tapered holes 6, which are evenly radiated outward into a regular circle with the screw hole 5 (center) as the center (and each hole is equidistant from left to right). The long axis of each tapered hole 6 (i.e., the axis of the line connecting the two ends) points to the center of the screw hole 5. The cylindrical body of the screw 4 is covered with threads, which match the threads on the inner wall of the screw hole 5. The screw 4 can be freely rotated in the screw hole 5 through the threads to realize the up and down movement of the screw 4. The lower end of the screw 4 is free, and the upper end of the screw 4 is sleeved with the knob 1 and flush with its upper surface. The knob 1 is a ring-shaped columnar structure, the diameter of the knob 1 is larger than the diameter of the screw 4, and the knob 1 and the screw 4 are fixedly connected as a whole. A vertical through hole pin hole 2 is opened in the center of the annular upper surface of the knob 1, and the pin hole 2 penetrates the entire layer of the knob 1 and opens on the lower surface of the knob 1. The pin hole 2 is directly below the middle of the tapered hole 6. The upper and lower middle positions of the side walls of the knob 1 are recessed inward to form a rectangular pressure window 3, which extends inward and penetrates the pin hole 2. The side of the knob 1 is covered with knob patterns 10, which are used to increase the friction between the hand and the knob 1 during adjustment, so as to facilitate the rotation of the knob 1. The cylindrical pin 13 can rotate and slide up and down in the pin hole 2. The upper end of the pin 13 is sleeved with the upper limit ring 14 and is flush with its upper surface. The diameter of the upper limit ring 14 is larger than the aperture of the pin hole 2. The upper limit ring 14 can play a blocking role to prevent the pin 13 from sliding down and out of the pin hole 2. The lower end of the pin 13 is sleeved with the lower limit ring 9 and is flush with its lower surface. The diameter of the lower limit ring 9 is larger than the aperture of the pin hole 2. The lower limit ring 9 can play a blocking role to prevent the pin 13 from sliding up and out of the pin hole 2. With the blocking effect of the upper limit ring 14 and the lower limit ring 9, the pin 13 can only slide up and down in the pin hole 2. The cone 8 of the cone is connected to the bottom surface of the lower end of the pin 13, and the diameter of the circular surface of the cone 8 is consistent with the diameter of the pin 13. The diameter of the circular surface of the cone 8 is larger than the shortest diameter of the tapered hole 6 (i.e., the distance between two parallel sides) and the tip of the cone 8 can fall into the tapered hole 6. The cone 8 can slide up and down as the knob 1 is turned and fall into any one of the 24 tapered holes 6 distributed around the circumference. The pin 13 is covered with pin patterns 13, the function of which will be described later. Fig.17 The middle of the outer edges of both sides of the pressing window 3 are connected with an eccentric lock assembly 11, and the specific connection method will be described later. Fig.18 , Fig.19 and Fig. 20The eccentric lock assembly 11 uses the different rotation radius of the eccentric circle to increase / reduce the friction force to achieve the up and down sliding of the brake pin 13. The eccentric lock assembly 11 is composed of a bean sprout seat A15, a bean sprout seat B16, a pressure flap 17, an eccentric shaft 18, an axial hole B19, an eccentric circle 20, a round tooth 21 and an axial hole A22. The eccentric circle 20 is a right cylindrical shape, and the side surface is two right circular surfaces. The two right circular surfaces of the eccentric circle 20 deviate from the center by 1 / 2 radius and extend the eccentric shaft 18 to the left and right sides respectively. The bean sprout seat A15 and the bean sprout seat B16 are paired structures of the same size and are parallel to each other. A through hole axial hole A22 is opened on the side of the bean sprout seat A15, and a through hole axial hole B19 is opened on the side of the bean sprout seat B16. The axial hole B19 and the axial hole A22 are opposite to each other. The two ends of the eccentric shaft 18 are free to rotate in the shaft hole B19 and the shaft hole A22 respectively, that is, the eccentric circle 20 is rotated between the bean sprout seat A15 and the bean sprout seat B16. The position just behind the shaft root of the eccentric shaft 18 and the tangent on the cylindrical side of the eccentric circle 20 emits an arc-shaped pressure flap 17. When the shaft root of the eccentric shaft 18 and the root of the pressure flap 17 are both in a horizontal state, the drooping line at the end of the pressure flap 17 just passes through the center of the eccentric shaft 18. The left and right side surfaces of the pressure flap 17 are flush with the left and right circular side surfaces of the eccentric circle 20, that is, the pressure flap 17 has the same thickness as the eccentric circle 20. The cylindrical side surface of the eccentric circle 20 is covered with round teeth 21. Refer to Fig.21 The rear of the bean sprout seat A15 and the bean sprout seat B16 are respectively connected to the middle of the outer edges of both sides of the press window 3. The inner side surfaces of the bean sprout seat A15 and the bean sprout seat B16 are flush with the edge of the press window 3. That is, the eccentric circle 20 can freely enter and exit the press window 3, and the round teeth 21 contact the pin pattern 12. Both the round teeth 21 and the pin pattern 12 are used to increase the friction between each other to prevent the pin 13 from sliding up and down.

[0066] Reference Fig. 22 , How to use the screw locking assembly 30 (interpretation of the principle): 1. In the unlocked state, the end of the pressure flap 17 is at the bottom, and the rotation radius (i.e., the pressure stroke A) formed by the eccentric circle is the smallest (refer to Fig.24 ), at this time, the eccentric circle 20 and the pin 13 are in a separated state, and the pin 13 can slide freely up and down in the pin hole 2. Fig. 22 , the cone 8 at the bottom of the pin 13 falls into the tapered hole 6. Since the top diameter of the cone 8 is larger than the shortest diameter of the tapered hole 6 (i.e. the distance between the two parallel sides), only the tip of the cone 8 will fall into the tapered hole 6. Turn the knob 1, and the pin 13 in the pin hole 2 will be rotated together. Fig.25, the conical part of the cone 8 that falls into the conical hole 6 has a slope, and the slope of the cone is in force contact with the edge of the right-angled conical hole 6, that is, the cone 8 applies an oblique downward force to the edge of the conical hole 6. Since the position of the conical hole 6 is fixed and cannot be changed, it can only react to the slope of the cone 8, and the slope decomposes the reaction force into an upward force and a downward friction force along the slope. When the upward force is greater than the self-weight of the pin 13 and the friction force along the slope, the pin 13 will slide upward along the pin hole 2 until the cone 8 is completely exposed from the upper edge of the conical hole 6. Continue to twist the knob 1, and the tip of the cone 8 will slide in the gap between the two conical holes 6 until it falls into the adjacent conical hole 6. Continue to twist the knob 1, and the above situation will repeat. Refer to Fig. 22 As the knob 1 is twisted, the screw 4 will move downward or upward, and the pin 13 between the upper limit circle 14 and the lower limit circle 9 will move up and down in the pin hole 2. 2. Locking process: refer to Fig.24 , after confirming that the cone 8 has fallen into a certain conical hole 6, pull the pressure flap 17 and slowly rotate it upward from the bottom. The rotation radius (i.e., pressure range B) formed by the eccentric circle 20 slowly increases, and the eccentric circle 20 and the pin 13 slowly approach each other from the separated state until they are in contact. When the eccentric circle 20 rotates to the maximum diameter (i.e., the eccentric shaft 18 is farthest from the edge of the eccentric circle 20), the pressure range B is the largest, and the volume of the eccentric circle 20 between the eccentric shaft 18 and the pin pattern 12 is the largest, which means that the pressure of the eccentric circle 20 on the pin 13 is the largest, and the friction between the eccentric circle 20 and the pin 13 is also the largest. At this time, the pin 13 will not be able to slide freely up and down in the pin hole 2, but will be in a completely braked state. The pressure between the eccentric circle 20 and the pin 13 is in the most energetic state, and the end of the pressure flap 17 is in a free state (no object to rely on or contact with) and is unstable. The eccentric circle 20 may rotate left or right at any time. 3. Locking state: refer to Fig.24 When the end of the pressure disc 17 rotates forward (upward), the eccentric circle 20 rotates slightly by a certain angle, and the rotation radius (i.e., the pressure stroke C) formed by the eccentric circle 20 is second only to the pressure stroke B. Fig.23, at this time, the end of the pressure disc 17 will contact the knob pattern 10, the eccentric circle 20 will stop rotating, and it will be in a stable state of always applying contact force to the pressure disc 17. Although the pressure range C is second only to the pressure range B, the pressure provided by the eccentric circle 20 to the pin 13 is sufficient to brake the cone 8. That is, the cone 8 will always fall into the tapered hole 6. At this time, if the knob 1 or other screws 4 are manually turned to loosen the force, forcing the cone 8 to rotate, the slope of the cone 8 will come into force contact with the edge of the right-angled tapered hole 6, that is, the cone 8 applies an oblique downward force to the edge of the tapered hole 6. Since the position of the tapered hole 6 is fixed and cannot be changed, it can only react to the slope of the cone 8, and the slope decomposes the reaction force into an upward force and a downward friction force along the slope. At this time, the self-weight and braking force of the pin 13 will be much greater than the upward force, and the cone 8 will not slide upward, that is, the pin 13 will block the rotation of the knob 1. The screw 4 is locked in the threaded state. Refer to Fig.26 , the screw locking assembly 30 is fixedly connected by bonding the lower surface of the screw to the top plate 37. Because the upper and lower positions of the screw seat 7 and the support platform 33 are fixed, the descending screw 4 will compress the distance between the top plate 37 and the pressure rod 41. The elastic force of the spring 39 will increase, and the elastic force acts on the pressure rod 41→ball bowl 42→sliding ball 43→semicircular groove 35→shielding plate 34→support platform 33. That is, the sliding friction between the shielding plate 34 and the support platform 33 increases. Rotate the knob 1 to adjust the size of the friction force, so that the manual push or pull of the handle 36 can achieve the appropriate force to move the shielding plate 34 forward and backward, and the shielding plate 34 will not be very loose (causing it to move out of place, etc.).

[0067] Reference Fig. 27 and Fig.28 The single tile assembly 28 is composed of a screw locking assembly 30, a pinball assembly 31, a resistance point 32, a tile support platform 33, a semicircular groove 35 and a tile cover plate 45. The composition and structural relationship are similar to those of the edge tile assembly 29. The only difference is the tile cover plate 45, that is, the position relationship of the flush tile plate 34 in the edge tile assembly 29 is replaced by the tile cover plate 45. The left edge of the tile cover plate 45 exceeds the left wall of the tile support platform 33. The remaining structures on the tile cover plate 45 are consistent with the flush tile plate 34.

[0068] Reference Fig.29, the corrugated assembly 26 is composed of 7 groups of single tile assemblies 28 and a group of edge tile assemblies 29. The 7 groups of single tile assemblies 28 are arranged side by side, and the edge tile assemblies 29 are located at the head end. The way in which a group of edge tile assemblies 29 and the 7 groups of single tile assemblies 28 are combined with each other is that the sides of the screw seats 7 of adjacent single tile assemblies 28 (or edge tile assemblies 29) are fixedly connected, and the upper and lower surfaces of the two are kept horizontal, that is, the screw seats 7 of a group of edge tile assemblies 29 and the 7 groups of single tile assemblies 28 form an integral plane. The side (the side with a low slope) of the flush tile plate 34 of the single tile assembly 28 (or the side with a high slope) contacts the side (the side with a high slope) of the tile support platform 33 of the adjacent single tile assembly 28 and can slide against each other. The sides of the tile support platforms 33 of the adjacent single tile assemblies 28 (or edge tile assemblies 29) are fixedly connected, and the lower surfaces of the two are kept flush. Except that the side edge (the side with higher slope) of the flush tile plate 34 of the side tile assembly 29 at the head end is flush with the side edge of the tile support platform 33 below, the side edges (the side with higher slope) of the tiling plates 45 of the remaining 7 groups of single tile assemblies 28 all exceed the side edges of the tile support platforms 33 below them. The protruding portion of each tiling plate 45 will overlap the adjacent flush tile plates 34 up and down, which will be used for the connection and shielding between adjacent tiling plates 45 or between (tiling plates 45 and flush tile plates 34).

[0069] Reference Fig.30 , four groups of corrugated components 26 are arranged in parallel and opposite to each other to form a quadrilateral, and the components are connected by corner columns 27. The corner columns 27 are cubic structures, and two adjacent sides are connected to a corrugated component 26 respectively, and the remaining two sides are free. Two oppositely arranged corrugated components 26 are a pair, such as the two groups of corrugated components 26 on the left and right sides are pair A, and the remaining two groups are pair B. Pair A and pair B are not in the same plane. The connection method of the corrugated components 26 and the corner columns 27 in pair A is as follows: the corrugated components 26 are connected to the corner columns 27 through the side tile components 29 at the head end and the single tile components 28 at the tail end. The side of the screw seat 7 of the edge tile assembly 29 at the head end is connected to the side of the corner post 27 and the upper surfaces of the two are kept flush, the side of the flush tile plate 34 (the side with a higher slope) contacts the side of the corner post 27 and can slide against each other, the side of the tile support platform 33 (the side with a higher slope) is connected to the side of the corner post 27 and the lower surface of the corner post 27 exceeds the lower surface of the tile support platform 33. The side of the screw seat 7 of the single tile assembly 28 at the tail end is connected to the side of the corner post 27 and the upper surfaces of the two are kept flush, the side of the shingle plate 45 (the side with a lower slope) contacts the side of the corner post 27 and can slide against each other, the side of the tile support platform 33 (the side with a lower slope) is connected to the side of the corner post 27 and the lower surface of the corner post 27 exceeds the lower surface of the tile support platform 33. Refer to Fig.31The connection method of the corrugated component 26 and the corner column 27 in the pair B is as follows: the corrugated component 26 is connected to the corner column 27 through the side tile component 29 at the head end and the single tile component 28 at the tail end. The side of the screw seat 7 of the side tile component 29 at the head end is connected to the side of the corner column 27 and the upper surface of the corner column 27 exceeds the upper surface of the screw seat 7. The side of the flush tile plate 34 (the side with a higher slope) contacts the side of the corner column 27 and can slide against each other. The side of the tile support platform 33 (the side with a higher slope) is connected to the side of the corner column 27 and the lower surfaces of the two remain flush. The side of the screw seat 7 of the single tile assembly 28 at the tail end is connected to the side of the corner column 27 and the upper surface of the corner column 27 exceeds the upper surface of the screw seat 7, the side of the shingle board 45 (the side with a lower slope) contacts the side of the corner column 27 and can slide with each other, and the side of the shingle support platform 33 (the side with a lower slope) is connected to the side of the corner column 27 and the lower surfaces of the two are kept flush. The shingle boards 45 or the flush shingle boards 34 in the two opposite groups of corrugated components 26 can approach and separate from each other, and the (longitudinal axis) length of the two opposite shingle boards 45 or the flush shingle boards 34 is greater than the side length of the quadrilateral (i.e., the quadrilateral composed of the four groups of corrugated components 26 and the corner column 27), that is, the opposite shingle boards 45 or the flush shingle boards 34 can completely cover the hollowing of the side length of the quadrilateral. The A pair and the B pair are respectively in different planes, that is, when the shingle boards 45 or the flush shingle boards 34 in the two adjacent groups of corrugated components 26 approach each other at right angles, no collision will occur.

[0070] Example 2 Using the present invention (taking breast cancer electron beam irradiation as an example)

[0071] Reference Fig.33 When in use, insert the protrusion 23 into the head of the accelerator (a machine that generates electron beams) to achieve connection. The patient lies directly below the device. And expose the body surface with the irradiation field already outlined. Turn the head so that the edges of the two relative sets of corrugated components 26 roughly correspond to the parallel body surface field boundaries. Generally, the upper and lower boundaries of the breast cancer body surface field are parallel, and the edges of the left and right boundaries will have broken lines ("right-angle curves"), so generally the upper and lower boundaries need to be blocked in pieces, and the left and right boundaries need to be partially blocked. All the shingle plates 45 and the flush shingle plates 34 are in the starting state, that is, their front ends are flush with the right-angled sides of the corner connection 69. At this time, the entire hollow is not blocked by anything and is the maximum prepared field. Adjust the patient's lying position so that the entire body surface field is within the maximum prepared field. Refer to Fig.34 , turn on the machine's light beam to simulate light (use the light beam to simulate the ray beam), the light beam emits an initial light beam from the machine head and enters the light-limiting tube 78. After being shaped by the light-limiting tube 78, the initial light beam forms a vertical light beam that is consistent with the size of the inner wall of the light-limiting tube 78 - the secondary light beam. The secondary light beam moves vertically downward and passes through the moving path of the shingle plate 45 and the flush tile plate 34 just below the light-limiting tube. If the shingle plate 45 or the flush tile plate 34 is blocked, the secondary light beam will directly reach the skin, otherwise it will be blocked. Fig.35 , the operator can push each lever 36 to move the shingle plate 45 or the flush shingle plate 34 to block the light beam until the boundary of the light beam blocked by the head end of the shingle plate 45 or the flush shingle plate 34 is consistent with the boundary of the body surface. Finally, all the shingle plates 45 and the flush shingle plates 34 will be combined to form a hollow shape that is consistent with the boundary of the body surface field. The parts blocked by all the shingle plates 45 and the flush shingle plates 34 do not need to be irradiated with electron beams, and the unblocked space is the lead-blocking field that is consistent with the body surface. The secondary light beam reaches the skin after being shaped by the hollow pattern, that is, the irradiation field is successfully formed. In theory, the more shingle plates 45 and flush shingle plates 34 that constitute the corrugated component 26, the more precise the fold line boundary formed will be.

Claims

1. A corrugated electronic beam radiotherapy field manual lead shield device, characterized in that: The invention is composed of a card protrusion (23), a light limiting tube (24), four supporting feet (25), four groups of corrugated components (26) and four corner columns (27). The four groups of corrugated components (26) are arranged in parallel and opposite to each other to form a quadrilateral. The corrugated components (26) are connected through the corner columns (27). The corner columns (27) are cubic structures. Two adjacent side surfaces are respectively connected to a corrugated component (26), and the remaining two side surfaces are free. Two oppositely arranged corrugated components (26) are a pair. The two groups of corrugated components (26) on the left and right sides are a pair A. They are connected to the lower part of the side surface of the corner column (27) and are flush with the bottom surface of the corner column (27). The remaining two groups of corrugated components (2 6) are B pairs, which are connected to the upper part of the side of the corner column (27) and are flush with the upper surface of the corner column (27). The A pair and the B pair are not in the same plane. The central position of the upper surface of the four corner columns (27) extends a support foot (25) in an oblique upward and centripetal manner, and the end is connected to the lower part of the four corners of the light-limiting tube (24). The light-limiting tube (24) is a quadrilateral tube structure, and a circle of protrusions (23) are extended outward from the four sides of the upper edge. The lower edge of the light-limiting tube (24) is free, and the lower edge of the quadrilateral inner wall of the light-limiting tube (24) faces the quadrilateral surrounded by the four groups of corrugated components (26). The size of the quadrilateral inner wall of the light-limiting tube (24) is smaller than the size of the quadrilateral surrounded by the four groups of corrugated components 26. The connection method of the corrugated component (26) and the corner column (27) in the A pair is as follows: the corrugated component (26) is connected to the corner column (27) through the side tile component (29) at the head end and the single tile component (28) at the tail end respectively; the side of the screw seat (7) of the side tile component (29) at the head end is connected to the side of the corner column (27) and the upper surfaces of the two are kept flush; the side with a high slope of the tile plate (34) contacts the side of the corner column (27) and can slide against each other; the side with a high slope of the tile support platform (33) is connected to the side of the corner column (27) and the lower surface of the corner column (27) exceeds the lower surface of the tile support platform (33); the side of the screw seat (7) of the single tile component (28) at the tail end is connected to the side of the corner column (27) and the upper surfaces of the two are kept flush; the tile cover plate (45) The side with a low slope contacts the side of the corner column (27) and slides with each other; the side with a low slope of the tile support platform (33) is connected to the side of the corner column (27) and the lower surface of the corner column (27) exceeds the lower surface of the tile support platform (33); the connection method of the corrugated component (26) and the corner column (27) in the B pair is as follows: the corrugated component (26) is connected to the corner column (27) through the side tile component (29) at the head end and the single tile component (28) at the tail end respectively; the side of the screw seat (7) of the side tile component (29) at the head end is connected to the side of the corner column (27) and the upper surface of the corner column (27) exceeds the upper surface of the screw seat (7); the side with a high slope of the tile plate (34) contacts the side of the corner column (27) and slides with each other; the tile support platform (33) The side with a high slope is connected to the side of the corner column (27) and the lower surfaces of the two are kept flush, the side of the screw seat (7) of the single tile assembly (28) at the tail end is connected to the side of the corner column (27) and the upper surface of the corner column (27) exceeds the upper surface of the screw seat (7), the side with a low slope of the tile cover plate (45) contacts the side of the corner column (27) and slides against each other, the side with a low slope of the tile support platform (33) is connected to the side of the corner column (27) and the lower surfaces of the two are kept flush, and the A pair and the B pair are respectively located in different planes; The corrugated assembly (26) is composed of 7 groups of single tile assemblies (28) and a group of edge tile assemblies (29), the 7 groups of single tile assemblies (28) are arranged side by side, and the edge tile assembly (29) is located at the head end; The side tile assembly (29) is composed of a screw locking assembly (30), a ball assembly (31), a resistance point (32), a tile support platform (33), a tile plate (34), a semicircular groove (35) and a handle (36). The side tile assembly (29) is a tower structure with an upper, middle and lower part, and is composed of the tile support platform (33), the tile plate (34), the semicircular groove (35), the ball assembly (31) and the screw locking assembly (30) from bottom to top. The upper surface of the tile support platform (33) has a slope, and the left side is higher than the right side. The bottom surface of the tile support platform (33) is a horizontal square, and the four side surfaces of the tile support platform (33) are perpendicular to the bottom surface. The tile plate (34) is a sheet structure, presenting a parallelogram, and the upper and lower surfaces are parallel to each other, and the left and right side surfaces are parallel to each other. The tile plate (34) is attached to the upper surface of the tile support platform (33), and the left and right side edges of the tile plate (34) are parallel to each other. The semicircular groove (35) is formed along the long axis of the tile support platform (34) and is concave on the upper surface. The semicircular groove (35) is located directly above the left and right midlines of the tile support platform (33). The cylindrical resistance point (32) is located at the front end of the semicircular groove (35). The outer edge of the resistance point (32) is flush with the front edge of the semicircular groove (35). The upper surface of the resistance point (32) is flush with the tile support platform (34). The cylindrical handle (36) is located at the rear end of the semicircular groove (35). The outer edge of the handle (36) is flush with the rear end of the semicircular groove. The pinball assembly (31) is composed of a top plate (37), a limiting groove (38), a spring (39), an upper limit screw (40), a pressure rod (41), a ball bowl (42), a sliding ball (43) and a telescopic cylinder (44). The telescopic cylinder (44) is a hollow cylindrical structure, the upper end of which is fixedly connected to the disc structure top plate (37) and the lower end is free. The side wall surface of the telescopic cylinder (44) is provided with a long strip of limiting groove (38). The limiting groove (38) passes through the entire side wall of the telescopic cylinder (44) and is open on the inner wall. The spring (39) is located in the telescopic cylinder (44), the upper end of which abuts against the top plate (37) and the lower end of which abuts against the cylindrical pressure rod (41). The upper surface diameter of the cylindrical pressure rod (41) is smaller than the inner diameter of the telescopic cylinder (44), so that the pressure rod (41) is in the telescopic cylinder (44). The upper limit screw (40) is screwed to the side wall of the pressure rod (41) and moves in the limit groove (38), wherein the outer edge of the upper limit screw (40) exceeds the outer edge of the limit groove (38) and is in a free state, the upper limit screw (40) moves together with the pressure rod (41), the lower end of the pressure rod (41) is connected to the ball bowl (42), the ball bowl (42) is a bowl-shaped structure, in an inverted shape, a spherical sliding ball (43) is located in the ball bowl (42), the outer size of the sliding ball (43) matches the inner diameter of the ball bowl (42), the sliding ball (43) slides freely in the ball bowl (42), the bottom end of the sliding ball (43) contacts the semicircular groove (35), the size of the sliding ball (43) matches the inner diameter of the semicircular groove (35), and the sliding ball (43) can run along the semicircular groove (35); The screw locking assembly (30) is connected to the upper surface of the top plate (37), and the screw locking assembly (30) is composed of a knob (1), a pin hole (2), a pressure window (3), a screw (4), a screw hole (5), a tapered hole (6), a screw seat (7), a cone (8), a lower limit ring (9), a knob pattern (10), an eccentric lock assembly (11), a pin pattern (12), a pin (13) and an upper limit ring (14). The screw hole (5) is opened in the center of the square screw seat (7), and the screw hole (5) passes through the entire layer of the screw seat (7). The inner wall of the screw hole (5) is covered with threads. The tapered hole (6) is a rectangular shape formed by the depression on the upper surface of the screw seat (7). The two ends of the tapered hole (6) are arc-shaped and connected by a parallel line in the middle. There are 24 tapered holes (6) radiating outwards from the screw hole (5) as the center to form a regular circle. Each tapered hole (6) is equidistant from left to right. The long axis of each tapered hole (6) points to the center of the screw hole (5). The side wall of the cylindrical screw (4) is covered with threads, which match the threads on the inner wall of the screw hole (5). The screw (4) rotates freely in the screw hole (5) through the threads. The lower end of the screw (4) is free. The upper end of the screw (4) is sleeved with the knob (1) and the upper surface is flush. The knob (1) is a ring-column structure. The diameter of the knob (1) is larger than the diameter of the screw (4). The knob (1) ) and a screw (4) are fixedly connected, a vertical through hole pin hole (2) is opened on the annular upper surface of the knob (1), the pin hole (2) penetrates the entire layer of the knob (1) and opens a hole on the lower surface of the knob (1), the pin hole (2) is directly below the middle of the tapered hole (6), the upper and lower middle positions of the side wall of the knob (1) are recessed inward to form a rectangular pressing window (3), the pressing window (3) extends inward and penetrates the pin hole (2), the side surface of the knob (1) is covered with knob patterns (10), the cylindrical pin (13) rotates and moves up and down in the pin hole (2), the upper end of the pin (13) is sleeved with the upper limit ring (14) and the upper surface is flush, the upper limit ring (14) ) has a diameter greater than the diameter of the pin hole (2), the lower end of the pin (13) is sleeved with the lower limit ring (9) and the lower surface is flush, the diameter of the lower limit ring (9) is greater than the diameter of the pin hole (2), the diameter of the lower limit ring (9) is greater than the short diameter of the tapered hole (6), the cone (8) of the cone is connected to the bottom surface of the lower end of the pin (13), the diameter of the circular surface of the cone (8) is consistent with the diameter of the pin (13), the diameter of the circular surface of the cone (8) is greater than the shortest diameter of the tapered hole (6), and the tip of the cone (8) falls into the tapered hole (6), the pin (13) is covered with pin patterns (13), and the middle of the outer edges of both sides of the pressing window (3) are connected with eccentric lock components (11); The eccentric lock assembly (11) is composed of a bean sprout seat A (15), a bean sprout seat B (16), a pressure flap (17), an eccentric shaft (18), an axial hole B (19), an eccentric circle (20), a round tooth (21) and an axial hole A (22). The eccentric circle (20) is a right cylindrical shape, and the side surface is two right circular surfaces. The eccentric shaft (18) is extended to the left and right sides at the eccentric 1 / 2 radius of the two right circular surfaces of the eccentric circle (20). The bean sprout seat A (15 ) has a through hole shaft hole A (22) on the side, and a through hole shaft hole B (19) is formed on the side of the bean sprout seat B (16). The bean sprout seat A (15) and the bean sprout seat B (16) are a pair of structures with the same size and are parallel to each other. The shaft hole B (19) and the shaft hole A (22) are opposite to each other. The two ends of the eccentric shaft (18) are free to rotate in the shaft hole B (19) and the shaft hole A (22). The eccentric circle (20) is located between the bean sprout seat A (15) and the bean sprout seat B (16). The eccentric shaft (18) and the seat (16) rotate with each other, and a circular arc-shaped pressure flap (17) is emitted from a tangent line on the cylindrical side surface of the eccentric circle (20) just behind the shaft root of the eccentric shaft (18). When the shaft root of the eccentric shaft (18) and the root of the pressure flap (17) are in a horizontal state, a vertical line at the end of the pressure flap (17) just passes through the center of the eccentric shaft (18), and the left and right side surfaces of the pressure flap (17) are flush with the left and right circular side surfaces of the eccentric circle (20), wherein the eccentric circle (20) ) is covered with round teeth (21) on the side of the column body, the rear of the bean sprout seat A (15) and the bean sprout seat B (16) are respectively connected to the middle of the outer edges of both sides of the pressing window (3), wherein the inner side surfaces of the bean sprout seat A (15) and the bean sprout seat B (16) are flush with the edge of the pressing window (3), the eccentric circle (20) can freely enter and exit the pressing window (3), the round teeth (21) contact the pin pattern (12), and the bottom end of the screw (4) is connected to the upper surface of the top plate (37); The single tile assembly (28) is composed of a screw locking assembly (30), a pinball assembly (31), a blocking point (32), a tile support platform (33), a semicircular groove (35) and a tile covering plate (45). The only difference between the structure of the single tile assembly (28) and the structure of the edge tile assembly (29) is the tile covering plate (45). The flush tile plate (34) in the edge tile assembly (29) is replaced by the tile covering plate (45). The left edge of the tile covering plate (45) exceeds the left side wall of the tile support platform (33). The remaining structure of the tile covering plate (45) is the same as that of the flush tile plate (34). The manner in which one group of edge tile assemblies (29) and the seven groups of single tile assemblies (28) are connected to each other is as follows: the side surfaces of the screw seats (7) of the adjacent single tile assemblies (28) or edge tile assemblies (29) are fixedly connected, and the upper and lower surfaces of the two groups are kept horizontal, that is, the side surfaces of the screw seats (7) of one group of edge tile assemblies (29) and the seven groups of single tile assemblies (28) form an integral plane, the side surfaces of the tile plates (34) of the single tile assemblies (28) or edge tile assemblies (29) contact the side surfaces of the tile support platforms (33) of the adjacent single tile assemblies (28) and slide against each other, and the adjacent single tile assemblies (28) or edge tile assemblies The side surfaces of the tile support platforms (33) of the side tile components (29) are fixedly connected, and the lower surfaces of the two are kept flush. Except that the side edges of the tile-aligning plates (34) of the side tile components (29) at the head end are flush with the side surfaces of the tile support platforms (33) below, the side edges of the shingle plates (45) of the remaining seven groups of single tile components (28) all exceed the side surfaces of the tile support platforms (33) below them. The protruding portion of each shingle plate (45) will overlap with the adjacent shingle plates (34) up and down, and is used for the connection and shielding between adjacent shingle plates (45) or between shingle plates (45) and shingle plates (34).

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