Progressive curvature generator and variable curvature x-ray probe

Abstract

The application provides a progressive curvature generator and a variable curvature X-ray detection device. The bending arm of the progressive curvature generator can realize progressive bending and progressive flattening. In use, the lower surface of the left end of a flexible X-ray detection panel is connected with the upper surface of the last extension section of the left bending arm, the lower surface of the right end of the panel is connected with the upper surface of the last extension section of the right bending arm, and the lower surface of the middle of the panel is connected with the upper surface of the frame body, thereby forming the variable curvature X-ray detection device. When the bending arm of the progressive curvature generator performs a bending action, all the extension sections and the straight connection section rotate in sequence from the direction away from the frame body to the direction close to the frame body, thereby sequentially reducing the curvature radius of the flexible X-ray detection panel, forming progressive curvature change, adapting to objects to be measured with different curvature radii, and reducing image distortion. Meanwhile, the progressive bending and the progressive flattening can effectively reduce the possibility of buckling damage of the flexible panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of X-ray detection, in particular to a progressive curvature generator and a variable curvature X-ray detection device. BACKGROUND

[0002] The X-ray detection device is used for projecting the density distribution information of each part of an object onto an X-ray acquisition and imaging device to form a corresponding image, so as to observe the internal structure and condition of the object, by using the penetration, differential absorption, photosensitivity and fluorescence of X-rays. It can be widely applied in medical treatment, industrial non-destructive testing and other fields.

[0003] The traditional flat panel X-ray detection device uses a non-flexible detection panel such as a glass type TFT (Thin Film Transistor, i.e. thin film field effect transistor) and a rigid structure design, which leads to a distorted image of the rest part except the area where the detection device is in tangential contact with the measured object when the measured object has a certain curvature, such as CBCT (Cone beam CT, i.e. cone beam CT) used in the medical field, non-destructive testing of pipelines, etc. The greater the curvature of the measured object, the more serious the image distortion, which brings difficulties to the evaluation and judgment of the image.

[0004] The X-ray detection device with fixed curvature can reduce the image distortion to a certain extent, but it cannot adapt to measured objects with different curvatures.

[0005] For example, in the field of non-destructive testing of pipelines, since the diameters of the pipelines are various and the curvatures are different, when the flat panel X-ray detection device is used to detect the pipeline, image distortion will basically occur. When the X-ray detection device with fixed curvature is used to detect the pipeline, the image distortion problem can be effectively improved for the pipeline with the matching curvature, but the image distortion problem still exists for the pipeline without the matching curvature. SUMMARY

[0006] The progressive curvature generator and the variable curvature X-ray detection device can realize the bending and predetermined curvature maintaining of the flexible X-ray detection panel, and also reduce the risk of damage of the flexible X-ray detection panel by progressive bending and progressive flattening.

[0007] In a first aspect, a progressive curvature generator is provided, comprising a frame body and a bending arm. The bending arm comprises a straight section and at least one extended section, wherein the front end of the straight section is rotatably connected to the frame body; when there is only one extended section, the front end of the extended section is rotatably connected to the rear end of the straight section; when there are multiple extended sections, the multiple extended sections are rotatably connected end to end, with the front end of the frontmost extended section rotatably connected to the rear end of the straight section. The rotation axis of the straight section around the frame body, the rotation axis of the extended section around the straight section, and the rotation axis between two adjacent extended sections are all parallel.

[0008] The structure of the bending arm is configured such that, during the bending process of the bending arm, the extension section at the rear rotates forward to the extreme angle before the adjacent extension section or the straight-connected section at the front can begin to rotate forward; when the bending arm returns to its initial position after bending, the extension section or the straight-connected section at the front first rotates in the opposite direction to the initial position before the adjacent extension section at the rear can rotate in the opposite direction. The bending arms are symmetrically arranged on the left and right sides of the frame body, and the rotation axis of the straight-connected section of the left bending arm around the frame body is parallel to the rotation axis of the straight-connected section of the right bending arm around the frame body. Positions for connecting to the flexible panel are provided on the upper surface of the rearmost extension section of the bending arm and the middle upper surface of the frame body.

[0009] In one feasible solution, the states of the direct connection section include an initial position state, a rotatable state, and a restored state. The initial position state is when the direct connection section is parallel to the frame body. The rotatable state is when the direct connection section rotates upward in a forward direction to form a predetermined angle with the frame body. The restored state is when the direct connection section rotates in the reverse direction from the predetermined angle to the initial position state. The rotation angle range of the extension section is from the initial angle to a predetermined limit angle. The states of the extension section include a first state, a second state, and a third state. The first state is when the extension section rotates to the predetermined limit angle. The second state is when the extension section rotates to the predetermined limit angle. The third state is when the extension section rotates from the predetermined limit angle to the initial angle.

[0010] The progressive curvature generator includes a rotation structure and a linkage mechanism. The rotation structure is arranged at the connection between the direct connection section and the frame body, and is used to rotate the direct connection section in the forward direction and maintain a predetermined angle with the frame body, and is also used to rotate the direct connection section in the reverse direction to restore it to its initial position. The linkage mechanism is used, in a first aspect, to keep the front direct connection section in its initial position or to keep the rotation angle of the adjacent front extension section at its initial angle when the rear extension section is in the first state; in a second aspect, to keep the direct connection section in a rotatable state or to keep the rotation angle of the adjacent front extension section from the first state at its initial angle when the extension section is in the second state; in a third aspect, to keep the adjacent rear extension section in the second state when the direct connection section is in a reverse rotation recovery state or when the front extension section is in the third state; and in a fourth aspect, to keep the adjacent rear extension section from the second state to the third state when the direct connection section rotates in the reverse direction and restores it to its initial position or when the rotation angle of the front extension section returns to its initial angle.

[0011] In one feasible solution, the front end of each extension segment is configured with a first mating plane and a second mating plane, with the first mating plane and the second mating plane being configured to form a predetermined angle β. When the extension segment's rotation angle is at an initial angle, the first mating plane of the current extension segment aligns with the rear end face of the preceding extension segment or the directly connected segment. When the extension segment's rotation angle reaches a predetermined limit angle, the second mating plane of the current extension segment aligns with the rear end face of the preceding extension segment or the directly connected segment.

[0012] In one feasible solution, a rotating shaft is provided on the frame body, the rear end of the straight-connection section, and the rear end of the front extension section of the adjacent extension sections. The straight-connection section cooperates with the rotating shaft on the frame body to form a rotatable structure; the rear extension section cooperates with the rotating shaft of the front straight-connection section to form a rotatable structure; and the rear extension section cooperates with the rotating shaft of the front extension section to form a rotatable structure. A socket is provided on the rotating shaft along the diameter of the rotating shaft. The linkage mechanism includes a stopper assembly, a rod, a locking pin, a ball stud, and a compression spring. Stopper assemblies are provided on both the straight-connection section and the extension section. The stopper assembly includes a first stopper at the rear and a second stopper at the front. The first stopper is provided with a first through-hole extending from front to back, and the second stopper is provided with a second through-hole extending from front to back. The front end of the rod is rigidly connected to the rear end of the locking pin; the rear end of the rod is inserted into the first through-hole; the front end of the locking pin passes through the second through-hole. When the socket and the second through-hole are aligned, the front end of the locking pin can be inserted into the socket. The ball pin is arranged at the rear end of the rod, and the compression spring is sleeved on the locking pin and is located at the connection between the second stop and the rod and the locking pin. The compression spring is used to apply a force to the second stop and the locking pin to move away from each other. When the first mating plane of the extension section at the rear is in contact with the rear end face of the straight-connection section or the front extension section, the first mating plane pushes the ball pin forward so that the front end of the locking pin is inserted into the socket. When the extension section at the rear rotates forward so that the second mating plane is in contact with the rear end face of the straight-connection section or the front extension section, a locking gap is formed between the first mating plane and the rear end face of the straight-connection section or the front extension section. The compression spring pushes the locking pin backward, the front end of the locking pin is pulled out of the socket, and the ball pin at the rear end of the rod extends into the locking gap.

[0013] In an operative solution, the rotating structure includes a first ratchet with incompletely meshing teeth, a leaf spring, a first fixed seat, a first pawl and a pawl spring. The first ratchet with incompletely meshing teeth is fixedly mounted on the frame body, and the axis of the first ratchet coincides with the axis of rotation of the direct-connection section around the frame body. The bottom end of the leaf spring is fixedly connected to the direct-connection section, and the upper end is suspended. The first fixed seat is fixed on the side of the leaf spring facing the first ratchet, and the first fixed seat is provided with a guide hole facing the first ratchet. The first pawl is arranged in the guide hole of the first fixed seat and is slidable. The pawl spring is arranged in the guide hole, and one end is connected to the first pawl and the other end is connected to the leaf spring. The pawl spring applies a force to move the leaf spring and the first pawl away from each other. When the direct-connection section rotates upward around the frame body, the first pawl is fed and locked in the first ratchet.

[0014] In an embodiment, the rotating structure comprises a first fixed shaft, a second ratchet wheel with full circumferential engagement teeth, a top-holding assembly, a second fixed seat, a second pawl and a pawl spring. The first fixed shaft is arranged on the frame body, and the front end of the straight connection section is rotationally connected to the frame body through the first fixed shaft. The second ratchet wheel with full circumferential engagement teeth is sleeved on the first fixed shaft, and the inner wall of the second ratchet wheel is provided with a circumferentially arranged array of arc grooves. The top-holding assembly comprises a plunger, a top-holding spring and a ball head; wherein a through hole with internal threads is formed in the first fixed shaft in the diametrical direction, the ball head of the top-holding assembly is arranged at one end of the through hole, the plunger is arranged at the other end of the through hole through threaded connection, and the top-holding spring is arranged between the plunger and the ball head; the plunger is rotated to make the top-holding spring tightly press against the ball head, so that the ball head tightly presses against the arc grooves on the inner wall of the second ratchet wheel, a predetermined rotating force is applied to the second ratchet wheel to make the second ratchet wheel rotate so that the ball head enters other adjacent arc grooves. The second fixed seat is fixed on the straight connection section and is provided with a guide groove facing the second ratchet wheel. The second pawl is arranged in the guide groove of the second fixed seat and is slidable. The pawl spring is arranged in the guide groove, one end of the pawl spring is in contact with the second pawl, and the other end of the pawl spring is in contact with the bottom of the guide groove. The pawl spring applies a force to the bottom of the guide groove and the second pawl to move away from each other. When the straight connection section rotates around the frame body in the upward direction, the second pawl is fed and locked in the second ratchet wheel.

[0015] In an embodiment, the rotating structure comprises a second fixed shaft, a third ratchet wheel with full circumferential engagement teeth, a second fixed seat, a second pawl, a pawl spring and an overrunning clutch. The second fixed shaft is arranged on the frame body, and the front end of the straight connection section is rotationally connected to the second fixed shaft. The third ratchet wheel with full circumferential engagement teeth is sleeved on the second fixed shaft. The second fixed seat is fixed on the straight connection section and is provided with a guide groove facing the third ratchet wheel. The second pawl is arranged in the guide groove of the second fixed seat and is slidable. The pawl spring is arranged in the guide groove, one end of the pawl spring is in contact with the second pawl, and the other end of the pawl spring is in contact with the bottom of the guide groove. The pawl spring applies a force to the bottom of the guide groove and the second pawl to move away from each other. The overrunning clutch is arranged in the second fixed shaft. When the straight connection section rotates around the frame body in the upward direction, the overrunning clutch is used to prevent the third ratchet wheel from rotating, the second pawl is fed and locked on the third ratchet wheel, and when the straight connection section rotates around the frame body in the downward direction, the overrunning clutch is used to make the third ratchet wheel rotate with the straight connection section.

[0016] In an embodiment, the number of extension sections is greater than or equal to two, and the preset included angle β of all the extension sections is the same, or the preset included angle β of at least two extension sections is different.

[0017] According to the second aspect of the present application, a variable curvature X-ray detection device is also provided, including the progressive curvature generator in the aforementioned scheme, and also including a flexible X-ray detection panel, the left end of the flexible X-ray detection panel is fixedly connected to the upper surface of the rearmost extension section of the bending arm on the left side of the frame body, the right end of the flexible X-ray detection panel is fixedly connected to the upper surface of the rearmost extension section of the bending arm on the right side of the frame body, and the middle lower surface between the front and rear ends of the flexible X-ray detection panel is fixedly connected to the middle of the upper surface of the frame body.

[0018] Compared with the prior art, the beneficial effects of this application include at least:

[0019] 1) When using the progressive curvature generator of the present application to drive the flexible X-ray detection panel to bend, the left lower surface of the flexible X-ray detection panel is connected to the upper surface of the rearmost extension section of the left bending arm, the right lower surface of the flexible X-ray detection panel is connected to the upper surface of the rearmost extension section of the right bending arm, and the middle lower surface of the flexible X-ray detection panel is connected to the upper surface of the frame body. When the bending arm of the progressive curvature generator is bent, all the extension sections and the directly connected sections rotate progressively in a direction from away from the frame body to closer to the frame body, thereby gradually reducing the curvature radius of the flexible X-ray detection panel, forming a progressive curvature change. This can adapt to objects with different curvature radii, reduce image distortion, and improve image quality when detecting objects with curvature through X-rays.

[0020] 2) At the same time, during the process from flattening to bending, all extension sections and straight-connected sections rotate progressively in sequence from a direction away from the frame body to a direction close to the frame body, so that the flexible X-ray detection panel achieves progressive bending, to ensure that the flexible X-ray detection panel does not buckle during the bending process. During the process from bending to flattening, all extension sections and straight-connected sections rotate progressively in the opposite direction from a direction close to the frame body to a direction away from the frame body, so that the flexible X-ray detection panel achieves a reverse progressive flattening action, to ensure that the flexible X-ray detection panel does not buckle during the process of recovering from bending to flattening. It can be seen from this that due to the progressive bending and progressive flattening of the bending arm, the bending and flattening changes of the flexible X-ray detection panel are smoother and smoother, and the occurrence of buckling of the flexible X-ray detection panel is basically avoided, thereby protecting the flexible panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 1 is a side structural diagram of a progressive curvature generator according to an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the structure of the flexible X-ray detection panel that undergoes buckling;

[0024] Figure 3 1 is a front view schematic diagram of the internal structure of the bending arm of the progressive curvature generator according to an embodiment of the present application;

[0025] Figure 4 Schematic diagram of the reverse side of the internal structure of the bending arm of the progressive curvature generator according to an embodiment of the present application;

[0026] Figure 5 The linkage structure state of the progressive curvature generator according to the embodiment of the present application is shown Figure 1 ;

[0027] Figure 6 The linkage structure state of the progressive curvature generator according to the embodiment of the present application is shown Figure 2 ;

[0028] Figure 7 The linkage structure state of the progressive curvature generator according to the embodiment of the present application is shown Figure 3 ;

[0029] Figure 8 Schematic diagram of a first rotation structure of a progressive curvature generator according to an embodiment of the present application;

[0030] Figure 9a Schematic diagram of a second rotation structure of a progressive curvature generator according to an embodiment of the present application;

[0031] Figure 9b for Figure 9a A magnified view of the local structure at point A;

[0032] Figure 10a 1 is a schematic structural diagram of the second rotating structure of the progressive curvature generator during reversal according to an embodiment of the present application;

[0033] Figure 10b for Figure 10a A magnified view of the local structure at point B in the middle;

[0034] Figure 11 Schematic diagram of a third rotation structure of a progressive curvature generator according to an embodiment of the present application;

[0035] Figure 12Schematic diagram of the structure of a variable curvature X-ray detection device according to an embodiment of the present application.

[0036] In the figure: 10, progressive curvature generator; 11, frame body; 111, first fixed axis; 112, second fixed axis; 12, bending arm; 121, straight section; 122, extension section; 1221, first mating plane; 1222, second mating plane; 123, rotating shaft; 1231, socket; 13, rotating structure; 131, first ratchet; 132, leaf spring; 133, first fixing seat; 1331, guide hole; 134, first pawl; 135, pawl spring; 151, second ratchet; 1511, arc Groove; 152, holding assembly; 1521, plunger; 1522, holding spring; 1523, ball head; 153, second fixed seat; 1531, guide groove; 154, second pawl; 161, third ratchet; 162, overrunning clutch; 14, linkage mechanism; 141, first stop; 1411, first through-hole; 142, second stop; 1421, second through-hole; 143, rod; 144, locking pin; 145, ball pin; 146, compression spring; 20, end block; 100, flexible X-ray detection panel. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0039] It should be noted that the directional words such as "front", "rear", "front end" and "rear end" in this application are only used to clearly express the relative position relationship between the components, and do not constitute an absolute position limitation for the entire device or a single component. Figure 1 For example, the “front”, “rear”, “front end” and “rear end” that appear below are explained as follows: “front” and “front end” refer to the side close to the frame body 11, and “rear” and “rear end” refer to the side away from the frame body 11. For example, Figure 1In the curved arm 12 on the middle left side, the straight section 121 is located in front of the extended section 122 , and the rear end of the straight section 121 is connected to the front end of the extended section 122 .

[0040] According to the first aspect of the present application, a progressive curvature generator is first provided, such as Figure 1 As shown, the progressive curvature generator 10 includes a frame body 11 and a bending arm 12 .

[0041] The flexure arm 12 includes a straight section 121 and at least one extension section 122. The front end of the straight section 121 is rotatably connected to the frame body 11. When there is only one extension section 122, the front end of the extension section 122 is rotatably connected to the rear end of the straight section 121. When there are multiple extension sections 122, the multiple extension sections 122 are rotatably connected end to end, with the front end of the frontmost extension section 122 rotatably connected to the rear end of the straight section 121. The rotation axis of the straight section 121 about the frame body 11, the rotation axis of the extension section 122 about the straight section 121, and the rotation axis between two adjacent extension sections 122 are all parallel.

[0042] Among them, the structure of the bending arm 12 is configured as follows: during the bending process of the bending arm 12, the rear extension section 122 rotates forward to the extreme angle, and the adjacent front extension section 122 or the direct connection section 121 can start to rotate forward; when the bending arm 12 returns to its initial position after bending, the front extension section 122 or the direct connection section 121 first rotates reversely to the initial position, and the adjacent rear extension section 122 can rotate reversely.

[0043] At the same time, flexure arms 12 are symmetrically positioned on the left and right sides of the frame body 11. The straight connection section 121 of the left flexure arm 12 is parallel to the rotation axis of the frame body 11 and the straight connection section 121 of the right flexure arm 12. The upper surface of the rearmost extension section 122 of the flexure arm 12 and the middle upper surface of the frame body 11 are both provided with locations for connecting to the flexible panel.

[0044] It should be noted that, in the description of the solution of this embodiment, the flexible X-ray detection panel is used to represent the flexible panel.

[0045] When using the technical solution of this embodiment, the lower surface of the left end of the flexible X-ray detection panel is connected to the upper surface of the rearmost extension section 122 of the left bending arm 12, the lower surface of the right end of the flexible X-ray detection panel is connected to the upper surface of the rearmost extension section 122 of the right bending arm 12, and the middle lower surface of the flexible X-ray detection panel is connected to the middle of the upper surface of the frame body 11.

[0046] Regardless of whether there is only one extension segment 122 or multiple extension segments 122, when transitioning from a flattened state to a curved state, the multiple extension segments 122 and the straight-connected segment 121 rotate sequentially from rear to front. After each extension segment 122 rotates to its maximum angle, the flexible X-ray detection panel forms a predetermined radius of curvature. By rotating the extension segments 122 sequentially to their maximum angles, the radius of curvature of the flexible X-ray detection panel decreases, thereby accommodating a variety of objects to be tested with different curvatures. After all extension segments 122 have rotated to their maximum angles in the order from rear to front, the forward straight-connected segment 121 can rotate about its connection with the frame body 11 to further change the radius of curvature of the flexible X-ray detection panel to accommodate objects to be tested with a smaller radius of curvature.

[0047] From this, it can be seen that when the bending arm 12 of the progressive curvature generator of this embodiment performs a bending action, all the extension sections 122 and the direct connection sections 121 rotate progressively in sequence from away from the frame body 11 to close to the frame body 11, thereby causing the curvature radius of the flexible X-ray detection panel to gradually decrease, forming a progressive curvature change, thereby being able to adapt to objects to be tested with different curvature radii, reducing image distortion, and improving image quality when X-rays detect objects with curvature.

[0048] At the same time, during the process of flattening to bending, all the extension sections 122 and the straight-connection sections 121 rotate progressively in a direction from away from the frame body 11 to closer to the frame body 11, so that the flexible X-ray detection panel achieves progressive bending, thereby ensuring that the flexible X-ray detection panel does not buckle during the bending process. During the process of bending to flattening, all the extension sections 122 and the straight-connection sections 121 rotate progressively in the opposite direction in a direction from closer to the frame body 11 to away from the frame body 11, thereby achieving a reverse progressive flattening action of the flexible X-ray detection panel, thereby ensuring that the flexible X-ray detection panel does not buckle during the process of recovering from bending to flattening. It can be seen from this that due to the progressive bending and progressive flattening of the bending arm 12, the bending and flattening changes of the flexible X-ray detection panel are smoother and more gradual, and the occurrence of buckling of the flexible X-ray detection panel is basically avoided, thereby protecting the flexible panel.

[0049] It should be noted that if Figure 2 As shown, if the bending arm 12 has a straight section 121 and two extension sections 122, but their rotation can be performed independently rather than in a progressive manner, then if the leftmost extension section 122 rotates upward, the rightmost straight section 121 also bends upward, and the middle extension section 122 rotates downward, the upper flexible X-ray detection panel 100 may be caused to present Figure 2The buckled state shown in FIG. 1 may slowly damage the flexible X-ray detection panel 100 if this state occurs multiple times.

[0050] In this embodiment, the states of the direct connection section 121 include an initial position state, a rotatable state, and a restored state. The initial position state is when the direct connection section 121 is parallel to the frame body 11. The rotatable state is when the direct connection section 121 rotates in a positive direction upward to form a predetermined angle with the frame body 11. The restored state is when the direct connection section 121 rotates in the reverse direction from the predetermined angle to the initial position state. The rotation angle range of the extension section 122 is from the initial angle to the predetermined limit angle. The states of the extension section 122 include a first state, a second state, and a third state. The first state is when the extension section 122 rotates to the predetermined limit angle. The second state is when the extension section 122 rotates to the predetermined limit angle. The third state is when the extension section 122 rotates from the predetermined limit angle to the initial angle.

[0051] The progressive curvature generator 10 includes a rotation structure 13 and a linkage mechanism 14. The rotation structure 13 is provided at the connection between the direct connection section 121 and the frame body 11, and is used to rotate the direct connection section 121 in the forward direction and maintain a predetermined angle with the frame body 11, and also to rotate the direct connection section 121 in the reverse direction to return to its initial position. The first aspect of the linkage mechanism 14 is used to make the front direct-connection section 121 always in the initial position state or the rotation angle of the adjacent front extension section 122 always be the initial angle when the rear extension section 122 is in the first state; the second aspect of the linkage mechanism 14 is used to make the direct-connection section 121 enter a rotatable state or the rotation angle of the adjacent front extension section 122 from the first state always be the initial angle when the extension section 122 is in the second state; the third aspect is used to make the adjacent rear extension section 122 always in the second state when the direct-connection section 121 is in a recovery state of reverse rotation or when the front extension section 122 is in the third state; the fourth aspect is used to make the adjacent rear extension section 122 enter the third state from the second state when the direct-connection section 121 rotates reversely and returns to the initial position state or when the rotation angle of the front extension section 122 returns to the initial angle.

[0052] In this embodiment, if Figure 5 、 Figure 6 and Figure 7As shown, to limit the rotational angle range of extension sections 122, the front end of each extension section 122 is configured with a first mating plane 1221 and a second mating plane 1222. The first mating plane 1221 and the second mating plane 1222 are configured to form a predetermined angle β. When the rotational angle of extension section 122 is at the initial angle, the first mating plane 1221 of the current extension section 122 aligns with the rear end surface of the preceding extension section 122 or the straight-connection section 121. When the rotational angle of extension section 122 reaches the predetermined limit angle, the second mating plane 1222 of the current extension section 122 aligns with the rear end surface of the preceding extension section 122 or the straight-connection section 121.

[0053] That is, after the extension section 122 rotates forward until the second mating plane 1222 abuts the end surface of the front extension section 122 or the rear end of the straight-connection section 121, the forward rotation reaches its limit. After the extension section 122 rotates backward until the first mating plane 1221 abuts the end surface of the front extension section 122 or the rear end of the straight-connection section 121, the reverse rotation reaches its limit. The predetermined included angle β between the first mating plane 1221 and the second mating plane 1222 sets the angle at which each extension section 122 can rotate.

[0054] In this embodiment, the number of extension segments 122 is preferably greater than or equal to two. The preset angle β of all extension segments 122 is the same. Thus, when the corresponding extension segments 122 are rotated sequentially from the rear to the front, the bending arm 12 will produce the same bending angle change. Alternatively, at least two of the extension segments 122 may have different preset angles β. This means that the preset angle β of each extension segment 122 can be set to a specific value. Thus, when the corresponding extension segments 122 are rotated sequentially from the rear to the front, the bending arm 12 will produce different bending angle changes.

[0055] like Figure 6 As shown, the transition between the first mating plane 1221 and the second mating plane 1222 is configured as an arc shape, and the radius of the arc is preferably set to be equal to the distance from the rotation axis of the current extension section 122 to the rear end face of the front extension section 122 or the direct connection section 121, thereby improving the smoothness when the first mating plane 1221 and the second mating plane 1222 switch between each other.

[0056] Furthermore, the number of extension segments 122 is preferably greater than or equal to two. The greater the number of extension segments 122, the smaller their preset included angle β can be set. For example, they can all be less than or equal to 20 degrees, or less than or equal to 10 degrees, 5 degrees, etc., to achieve a smoother and more gradual change in curvature. When there are only two or only one extension segment 122, a larger preset included angle β can be set, such as 40 degrees, 30 degrees, etc.

[0057] Furthermore, in this embodiment, Figure 1 、 Figure 3 、 Figure 4 As shown, the frame body 11, the rear end of the straight section 121, and the rear end of the front extension section 122 among the adjacent extension sections 122 are respectively provided with a rotating shaft 123. The straight section 121 cooperates with the rotating shaft 123 on the frame body 11 to form a rotatable structure; the rear extension section 122 cooperates with the rotating shaft 123 of the front straight section 121 to form a rotatable structure; the rear extension section 122 cooperates with the rotating shaft 123 of the front extension section 122 to form a rotatable structure. Figure 5 As shown, the rotating shaft 123 is provided with an insertion hole 1231 along the diameter direction of the rotating shaft 123 .

[0058] like Figure 5 、 Figure 6 、 Figure 7 As shown, the linkage mechanism 14 includes a stopper assembly, a rod 143, a locking pin 144, a ball stud 145, and a compression spring 146. The stopper assembly is provided in both the straight section 121 and the extended section 122. The stopper assembly includes a first stopper 141 positioned at the rear and a second stopper 142 positioned at the front. The first stopper 141 is provided with a first through-hole 1411 extending from front to back, and the second stopper 142 is provided with a second through-hole 1421 extending from front to back. The front end of the rod 143 is rigidly connected to the rear end of the locking pin 144; the rear end of the rod 143 is inserted into the first through-hole 1411; the front end of the locking pin 144 passes through the second through-hole 1421. When the insertion hole 1231 and the second through-hole 1421 are aligned, the front end of the locking pin 144 can be inserted into the insertion hole 1231. The ball pin 145 and the compression spring 146, the ball pin 145 is arranged at the rear end of the rod 143, the compression spring 146 is sleeved on the locking pin 144 and is located at the connection between the second stop 142 and the rod 143 and the locking pin 144, the compression spring 146 is used to apply a force to the second stop 142 and the locking pin 144 to move away from each other.

[0059] like Figure 5 As shown, when the first mating plane 1221 of the extension section 122 at the rear is in contact with the rear end face of the direct-connection section 121 or the front extension section 122, the first mating plane 1221 pushes the ball pin 145 forward so that the front end of the locking pin 144 is inserted into the socket 1231, limiting the rotation of the front shaft 123, thereby ensuring that the extension section 122 or the direct-connection section 121 at the front cannot rotate.

[0060] like Figure 6As shown, the extension section 122 at the rear rotates forward, but in the process before the second mating plane 1222 is fitted with the rear end face of the straight-connection section 121 or the front extension section 122, a locking gap is gradually formed between the first mating plane 1221 and the rear end face of the straight-connection section 121 or the front extension section 122, and the compression spring 146 pushes the locking pin 144 to move backward, and the front end of the locking pin 144 is gradually withdrawn from the socket 1231, and a portion of the ball pin 145 at the rear end of the rod 143 extends into the locking gap M1. At this time, the extension section 122 or the straight-connection section 121 at the front cannot rotate.

[0061] like Figure 7 As shown, when the rear extension section 122 rotates forward so that the second mating plane 1222 is fully aligned with the rear end face of the straight-connection section 121 or the front extension section 122, a maximum locking gap M1 is formed between the first mating plane 1221 and the rear end face of the straight-connection section 121 or the front extension section 122. The compression spring 146 pushes the locking pin 144 backward, and the front end of the locking pin 144 is completely withdrawn from the insertion hole 1231, no longer restricting the rotation of the front shaft 123. The front extension section 122 or the straight-connection section 121 can begin to rotate. Simultaneously, the ball stud 145 at the rear end of the rod 143 extends into the locking gap M1. At this time, the locking pin 144 presses against the outer circumference of the shaft 123, preventing the rear ball stud 145 from retracting and pressing against the first mating plane 1221, thereby restricting the reverse rotation of the rear extension section 122.

[0062] The rear ball stud 145 will be retracted only after the front straight section 121 or the front extension section 122 rotates in the opposite direction and the locking pin 144 is reinserted into the insertion hole 1231 . Then the rear extension section 122 can rotate in the opposite direction.

[0063] Figure 3 The linkage mechanism 14 between the middle extension section 122 and Figure 4 The linkage mechanism 14 between the middle straight section 121 and the frame body 11 is not in the same plane, forming a different side arrangement, because the connection between the straight section 121 and the frame body 11 also needs to be arranged with a rotating structure 13, and the rotating structure 13 and the linkage mechanism 14 need to avoid each other. Figure 3 The linkage mechanism 14 between the straight connection section 121 and the frame body 11 is not visible.

[0064] In this embodiment, the end of the locking pin 144 is preferably set to be conical, or chamfered or rounded, and the edge of the socket 1231 is also preferably chamfered or rounded, or the socket 1231 is set to be a tapered hole, so that the locking pin 144 is easier to insert into the socket 1231, thereby playing the role of automatic guidance, elimination of gaps and shaking.

[0065] In this embodiment, the ball pin 145 is preferably configured to have a certain degree of compressibility to enhance the buffering effect between the structures. The implementation of this compressibility is not specifically limited; for example, the end of the ball pin 145 can be configured from an elastic material such as rubber or silicone. Furthermore, a spring pin can be used as the ball pin 145, but the compression should be minimized and the spring force increased to avoid excessive compressibility or insufficient spring force, which could cause the rear extension 122 to rotate in the opposite direction before the front locking pin 144 is inserted into the receptacle 1231, causing the first mating surface 1221 to compress the spring pin into the first through-hole 1411.

[0066] In this embodiment, the rotating structure 13 can have various structures. The rotating structure 13 can be a one-way damping mechanism or a two-way damping mechanism, for example, a disc damping shaft, a two-way gear rotary damper, etc. The damping force is used to maintain a predetermined angle between the direct connection section 121 and the frame body 11. When the reverse restoring force is greater than the damping force, the direct connection section 121 can be reversely rotated to return to its initial position. This application also provides several implementation plans of the rotating structure 13, which are as follows:

[0067] The first embodiment of the rotating structure 13:

[0068] like Figure 8 As shown, the rotating structure 13 includes a first ratchet 131 with incomplete meshing teeth, a leaf spring 132 , a first fixing seat 133 , a first pawl 134 and a pawl spring 135 .

[0069] The first ratchet 131 with incomplete meshing teeth is fixedly mounted on the frame body 11. The axis of the first ratchet 131 coincides with the axis of rotation of the direct connection section 121 around the frame body 11. The incomplete teeth on the first ratchet 131 can be configured as follows: intervals of 5 to 30 degrees, a pressure angle of 20 to 70 degrees, and a number of 2 to 15 teeth. The scheme in the accompanying drawings provides an example, in which 6 meshing teeth are arranged at intervals of 9 degrees, and the pressure angle is 50 degrees. The bottom end of the leaf spring 132 is fixedly connected to the direct connection section 121, and the upper end is suspended. The leaf spring 132 is made of a high modulus elastic material, such as 65Mn material. The first fixed seat 133 is fixed to the side of the leaf spring 132 facing the first ratchet 131. The first fixed seat 133 is provided with a guide hole 1331 facing the first ratchet 131. The first pawl 134 is arranged in the guide hole 1331 of the first fixed seat 133 and is slidable. A pawl spring 135 is disposed within the guide hole 1331, with one end connected to the first pawl 134 and the other end connected to the leaf spring 132. The pawl spring 135 exerts a force to move the leaf spring 132 and the first pawl 134 away from each other. When the straight-connected section 121 rotates upward around the frame body 11, the first pawl 134 is locked in the first ratchet 131.

[0070] During the forward rotation of the straight connection section 121, the first pawl 134 slides and jumps between the incomplete meshing teeth of the first ratchet wheel 131 through repeated compression and rebound of the pawl spring 135. At this time, the straight connection section 121 can be rotated forward relative to the frame body 11. Since a relatively large force is required for the deformation of the leaf spring 132, the ratchet / pawl pair can achieve self-locking to a certain extent, thereby maintaining the position of the straight connection section 121 and correspondingly maintaining the flexible panel at the expected radius of curvature.

[0071] During the reverse rotation of the straight connection section 121, when the restoring force applied to the straight connection section 121 reaches a certain degree, the deformation of the leaf spring 132 will cause the first pawl 134 to disengage from the meshing teeth of the first ratchet wheel 131 and quickly re-contact the next meshing tooth when the leaf spring 132 rebounds, thereby jumping between the meshing teeth of the first ratchet wheel 131 to achieve reverse unlocking of the ratchet / pawl pair. At this time, the straight connection section 121 can be rotated reversely relative to the frame body 11.

[0072] Second embodiment of the rotating structure 13:

[0073] As shown in Figure 9a and Figure 9b , the rotating structure 13 includes a first fixed shaft 111, a second ratchet wheel 151 with full-circumferential meshing teeth, a top-holding assembly 152, a second fixed seat 153, a second pawl 154, and a pawl spring 135.

[0074] The first fixed shaft 111 can be equivalent to the rotating shaft 123 at the connection between the straight connection section 121 and the frame body 11 in Figure 3 , or a fixed shaft coaxially arranged with the rotating shaft 123, and the front end of the straight connection section 121 is rotationally connected with the frame body 11 through the first fixed shaft 111. The second ratchet wheel 151 with full-circumferential meshing teeth is sleeved on the first fixed shaft 111, and the inner wall of the second ratchet wheel 151 is provided with circumferentially arrayed arc grooves 1511. The second ratchet wheel 151 can be configured to have circumferential meshing teeth with an interval of 5-30° and a pressure angle of 20-70°, Figure 9a In the provided example of the second ratchet wheel 151, 30 meshing teeth are arranged at an interval of 12°, and the pressure angle is 50°. The arc grooves 1511 provided on the inner wall of the second ratchet wheel 151 can be arranged at a radius of R0.1-R5 and an interval of 2-45° uniformly distributed along the circumference, Figure 9a In the provided example, the radius of the arc grooves 1511 is R0.5, and the interval is 6° uniformly distributed along the circumference.

[0075] Furthermore, the supporting assembly 152 includes a plunger 1521, a supporting spring 1522 and a ball head 1523; wherein, a through hole along the diameter direction and with an internal thread is opened in the first fixed shaft 111, the ball head 1523 of the supporting assembly 152 is arranged at one end of the through hole, the plunger 1521 is arranged at the other end of the through hole by threaded fitting, and the supporting spring 1522 is arranged between the plunger 1521 and the ball head 1523; the plunger 1521 is rotated to make the supporting spring 1522 press the ball head 1523, and then make the ball head 1523 press the arc groove 1511 on the inner wall of the second ratchet 151, and apply a predetermined rotational force to the second ratchet 151, so that the second ratchet 151 can be rotated to make the ball head 1523 enter other adjacent arc grooves 1511.

[0076] The second fixing seat 153 is fixed to the direct-connection section 121 and is provided with a guide slot 1531 facing the second ratchet 151. The second pawl 154 is slidably disposed in the guide slot 1531 of the second fixing seat 153. A pawl spring 135 is disposed within the guide slot 1531, with one end contacting the second pawl 154 and the other end contacting the bottom of the guide slot 1531. The pawl spring 135 exerts a force that forces the bottom of the guide slot 1531 and the second pawl 154 away from each other. When the direct-connection section 121 rotates upward around the frame body 11, the second pawl 154 is locked in the second ratchet 151.

[0077] During the forward rotation of the direct connection section 121, the second pawl 154 slides and jumps on the full circumference meshing teeth of the second ratchet 151 through the repeated compression and rebound of the pawl spring 135. At this time, the direct connection section can rotate forward relative to the frame body 11. At the same time, the ball head 1523 of the supporting assembly 152 presses against the arc groove 1511 on the inner wall of the second ratchet 151 (see Figure 9b ), a large force is required to cause slippage. At the same time, since the second fixing seat 153 cannot rotate, the ratchet / pawl pair can achieve self-locking, thereby maintaining the position of the straight section 121, and correspondingly keeping the flexible panel at the expected curvature radius.

[0078] like Figure 10a As shown, during the reverse rotation of the straight-connection section 121, when the restoring force applied to the straight-connection section 121 reaches a certain level, under the action of the force, the ball head 1523 of the supporting assembly 152 provided on the first fixed shaft 111 and the arc groove 1511 provided on the inner wall of the second ratchet 151 are squeezed (see Figure 10b), this squeezing can generate a thrust in the direction of the through-hole provided in the first fixed shaft 111 through the ball head 1523, thereby compressing the holding spring 1522 of the holding assembly 152, generating relative movement between the ball head 1523 and the arc groove 1511, completing reverse unlocking. At this time, the direct connection section 121 can rotate in the opposite direction relative to the frame body 11. When the second ratchet 151 rotates relative to the ball head 1523 to the next arc groove 1511, the ball head 1523, under the action of the holding spring 1522, falls into the next arc groove 1511 again, completing the locking again. By repeating the reverse unlocking and locking, the direct connection section 121 can rotate in the opposite direction relative to the frame body 11.

[0079] The third embodiment of the rotating structure 13:

[0080] like Figure 11 As shown, the rotating structure 13 includes a second fixed shaft 112 , a third ratchet 161 having full-circumferential meshing teeth, a second fixed seat 153 , a second pawl 154 , a pawl spring 135 and an overrunning clutch 162 .

[0081] The second fixed axis 112 may be equivalent to Figure 3 The rotating shaft 123 at the connection between the middle straight section 121 and the frame body 11, or a fixed shaft arranged coaxially with the rotating shaft 123, the front end of the straight section 121 is rotatably matched with the second fixed shaft 112. The third ratchet 161 with full-circle meshing teeth is sleeved on the second fixed shaft 112. The second fixed seat 153 is fixed on the straight section 121 and is provided with a guide groove 1531 facing the third ratchet 161. The second pawl 154 is arranged in the guide groove 1531 of the second fixed seat 153 and is slidable. The pawl spring 135 is arranged in the guide groove 1531, and one end contacts the second pawl 154, and the other end contacts the bottom of the guide groove 1531. The pawl spring 135 applies a force to move the bottom of the guide groove 1531 and the second pawl 154 away from each other.

[0082] The overrunning clutch 162 is disposed within the second fixed shaft 112. The overrunning clutch 162 is configured to prevent the third ratchet 161 from rotating when the direct-connection section 121 rotates upward around the frame body 11. The second pawl 154 is locked on the third ratchet 161. The overrunning clutch 162 is configured to cause the third ratchet 161 to rotate along with the direct-connection section 121 when the direct-connection section 121 rotates downward around the frame body 11. Numerous types of overrunning clutches 162 are available, and these are not listed here. Those skilled in the art may select one based on their specific needs.

[0083] According to the second aspect of this application, Figure 12As shown, a variable curvature X-ray detection device is also provided, including the progressive curvature generator 10 in the aforementioned scheme, and also including a flexible X-ray detection panel 100, the left end of the flexible X-ray detection panel 100 is fixedly connected to the upper surface of the rearmost extension section 122 of the bending arm 12 on the left side of the frame body 11, the right end of the flexible X-ray detection panel 100 is fixedly connected to the upper surface of the rearmost extension section 122 of the bending arm 12 on the right side of the frame body 11, and the middle lower surface between the front and rear ends of the flexible X-ray detection panel 100 is fixedly connected to the middle of the upper surface of the frame body 11.

[0084] In the variable curvature X-ray detection device, the bending and predetermined curvature maintenance of the flexible X-ray detection panel 100 are achieved through the progressive curvature generator 10, and the problem of buckling damage of the flexible X-ray detection panel 100 is prevented through progressive bending and progressive flattening.

[0085] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A progressive curvature generator, characterized in that: The progressive curvature generator (10) comprises a frame body (11) and a bending arm (12); The bending arm (12) comprises a straight connection section (121) and at least one extension section (122), wherein the front end of the straight connection section (121) is connected to the frame body (11) in a rotatable manner; when there is one extension section (122), the front end of the extension section (122) is connected to the rear end of the straight connection section (121) in a rotatable manner; when there are multiple extension sections (122), the multiple extension sections (122) are connected in sequence end to end in a rotatable manner, and the front end of the frontmost extension section (122) is connected to the rear end of the straight connection section (121) in a rotatable manner: The rotation axis of the straight-connected section (121) around the frame body (11), the rotation axis of the extended section (122) around the straight-connected section (121), and the rotation axis between two adjacent extended sections (122) are parallel to each other; The structure of the bending arm (12) is configured such that: during the bending process of the bending arm (12), the extension section (122) at the rear rotates forward to a limit angle before the extension section (122) or the straight-connected section (121) at the front can start to rotate forward; when the bending arm (12) returns to its initial position after bending, the extension section (122) or the straight-connected section (121) at the front first rotates in the reverse direction to the initial position before the extension section (122) at the rear can rotate in the reverse direction; The bending arms (12) are symmetrically arranged on the left and right sides of the frame body (11), respectively, and the straight section (121) of the left bending arm (12) around the rotation axis of the frame body (11) is parallel to the straight section (121) of the right bending arm (12) around the rotation axis of the frame body (11); The upper surface of the rearmost extension section (122) of the bending arm (12) and the middle upper surface of the frame body (11) are both provided with positions for connecting with a flexible panel; The state of the direct connection section (121) includes an initial position state, a rotatable state, and a restored state. The initial position state is a state in which the direct connection section (121) is parallel to the frame body (11). The rotatable state is a process in which the direct connection section (121) rotates in a positive direction toward the upper side to form a predetermined angle with the frame body (11). The restored state is a process in which the direct connection section (121) rotates in the reverse direction from the predetermined angle to restore to the initial position state. The rotation angle range of the extension section (122) is from an initial angle to a predetermined limit angle; the state of the extension section (122) includes a first state, a second state, and a third state, the first state being the process before the extension section (122) rotates to the predetermined limit angle, the second state being the process when the extension section (122) rotates to the predetermined limit angle, and the third state being the process before the extension section (122) rotates from the predetermined limit angle to the initial angle; The progressive curvature generator (10) comprises: a rotating structure (13), which is arranged at the connection between the direct connection section (121) and the frame body (11), and is used to rotate the direct connection section (121) in a forward direction and maintain a predetermined angle with the frame body (11), and is also used to rotate the direct connection section (121) in a reverse direction to return to the initial position; The linkage mechanism (14) is used, in a first aspect, for making the front direct-connection section (121) always in the initial position state or making the rotation angle of the adjacent front extension section (122) always the initial angle when the rear extension section (122) is in the first state; in a second aspect, for making the direct-connection section (121) enter the rotatable state or making the rotation angle of the adjacent front extension section (122) from the first state always the initial angle when the extension section (122) is in the second state; in a third aspect, for making the adjacent rear extension section (122) always in the second state when the direct-connection section (121) is in the recovery state of reverse rotation or when the front extension section (122) is in the third state; in a fourth aspect, for making the adjacent rear extension section (122) enter the third state from the second state when the direct-connection section (121) rotates in the reverse direction and returns to the initial position state or when the rotation angle of the front extension section (122) returns to the initial angle.

2. The progressive curvature generator according to claim 1, characterized in that The front end of each extension section (122) is configured with a first matching plane (1221) and a second matching plane (1222), and the first matching plane (1221) and the second matching plane (1222) are configured to have a preset angle β; When the rotation angle of the extension section (122) is at the initial angle, the first mating plane (1221) of the current extension section (122) fits with the rear end face of the front extension section (122) or the straight connection section (121); When the rotation angle of the extension section (122) is at the predetermined limit angle, the second mating plane (1222) of the current extension section (122) fits with the end face of the rear end of the front extension section (122) or the straight connection section (121).

3. The progressive curvature generator according to claim 2, characterized in that: The frame body (11), the rear end of the direct connection section (121), and the rear end of the front extension section (122) of the adjacent extension section (122) are respectively provided with a rotating shaft (123); The straight connection section (121) cooperates with the rotating shaft (123) on the frame body (11) to form a rotatable structure; the rear extension section (122) cooperates with the rotating shaft (123) of the front straight connection section (121) to form a rotatable structure; the rear extension section (122) cooperates with the rotating shaft (123) of the front extension section (122) to form a rotatable structure; The rotating shaft (123) is provided with an insertion hole (1231) along the diameter direction of the rotating shaft (123); The linkage mechanism (14) comprises: A stopper assembly is provided on both the direct connection section (121) and the extension section (122), the stopper assembly comprising a first stopper (141) positioned at the rear and a second stopper (142) positioned at the front, the first stopper (141) being provided with a first through-hole (1411) extending forward and backward, and the second stopper (142) being provided with a second through-hole (1421) extending forward and backward; A rod (143) and a locking pin (144), wherein the front end of the rod (143) is rigidly connected to the rear end of the locking pin (144); the rear end of the rod (143) is inserted into the first through-hole (1411); the front end of the locking pin (144) passes through the second through-hole (1421); and when the insertion hole (1231) and the second through-hole (1421) are aligned, the front end of the locking pin (144) can be inserted into the insertion hole (1231); a ball pin (145) and a compression spring (146), wherein the ball pin (145) is arranged at the rear end of the rod (143), and the compression spring (146) is sleeved on the locking pin (144) and is located at the connection between the second stop (142) and the rod (143) and the locking pin (144), and the compression spring (146) is used to apply a force to the second stop (142) and the locking pin (144) to move away from each other; When the first mating plane (1221) of the rear extension section (122) is in contact with the rear end face of the straight-connection section (121) or the front extension section (122), the first mating plane (1221) pushes the ball pin (145) forward so that the front end of the locking pin (144) is inserted into the socket (1231); When the extension section (122) at the rear rotates forward so that the second mating plane (1222) fits with the rear end face of the straight-connection section (121) or the front extension section (122), a locking gap is formed between the first mating plane (1221) and the rear end face of the straight-connection section (121) or the front extension section (122), and the compression spring (146) pushes the locking pin (144) to move backward, the front end of the locking pin (144) is pulled out of the socket (1231), and the ball pin (145) at the rear end of the rod (143) extends into the locking gap.

4. The progressive curvature generator according to any one of claims 1 to 3, characterized in that: The rotating structure (13) comprises: a first ratchet (131) having incompletely meshed teeth, which is fixedly arranged on the frame body (11), wherein the axis of the first ratchet (131) coincides with the rotation axis of the direct connection section (121) around the frame body (11); A leaf spring (132), the bottom end of which is fixedly connected to the straight connection section (121) and the upper end of which is suspended in the air; A first fixing seat (133) is fixed to a surface of the leaf spring (132) facing the first ratchet (131), and the first fixing seat (133) is provided with a guide hole (1331) facing the first ratchet (131); A first pawl (134) is arranged in the guide hole (1331) of the first fixing seat (133) and is slidable; a ratchet spring (135) disposed in the guide hole (1331), with one end connected to the first ratchet (134) and the other end connected to the leaf spring (132), the ratchet spring (135) imparting a force to the leaf spring (132) and the first ratchet (134) to move away from each other; When the straight connection section (121) rotates upward around the frame body (11), the first pawl (134) is fed and locked in the first ratchet (131).

5. The progressive curvature generator according to any one of claims 1 to 3, characterized in that: The rotating structure (13) comprises: A first fixed shaft (111) is provided on the frame body (11), and the front end of the straight connection section (121) forms a rotational fit with the frame body (11) via the first fixed shaft (111); a second ratchet (151) having full-circumferential meshing teeth, the second ratchet (151) being sleeved on the first fixed shaft (111), and an inner wall of the second ratchet (151) being provided with an array of arc grooves (1511) in a circumferential direction; A supporting assembly (152) includes a plunger (1521), a supporting spring (1522) and a ball head (1523); wherein a through hole having an internal thread and along a diameter direction is provided in the first fixed shaft (111); the ball head (1523) of the supporting assembly (152) is arranged at one end of the through hole; the plunger (1521) is arranged at the other end of the through hole by threaded engagement; the supporting spring (1522) is arranged between the plunger (1521) and the ball head The plunger (1521) is rotated to make the holding spring (1522) press against the ball head (1523), thereby making the ball head (1523) press against the arc groove (1511) on the inner wall of the second ratchet (151), and a predetermined rotational force is applied to the second ratchet (151), so that the second ratchet (151) can be rotated to make the ball head (1523) enter other adjacent arc grooves (1511); A second fixing seat (153) is fixed on the straight connection section (121) and is provided with a guide groove (1531) facing the second ratchet (151); A second pawl (154) is arranged in the guide groove (1531) of the second fixing seat (153) and is slidable; a ratchet spring (135) disposed in the guide groove (1531), with one end in contact with the second ratchet (154) and the other end in contact with the bottom of the guide groove (1531), wherein the ratchet spring (135) exerts a force on the bottom of the guide groove (1531) and the second ratchet (154) to move away from each other; When the straight connection section (121) rotates upward around the frame body (11), the second pawl (154) is fed and locked in the second ratchet (151).

6. The progressive curvature generator according to any one of claims 1 to 3, characterized in that: The rotating structure (13) comprises: A second fixed shaft (112) is provided on the frame body (11), and the front end of the straight connection section (121) is rotationally engaged with the second fixed shaft (112); a third ratchet (161) having full-circumferential meshing teeth, the third ratchet (161) being sleeved on the second fixed shaft (112); A second fixing seat (153) is fixed on the straight connection section (121) and is provided with a guide groove (1531) facing the third ratchet (161); A second pawl (154) is arranged in the guide groove (1531) of the second fixing seat (153) and is slidable; a ratchet spring (135) disposed in the guide groove (1531), with one end in contact with the second ratchet (154) and the other end in contact with the bottom of the guide groove (1531), wherein the ratchet spring (135) exerts a force on the bottom of the guide groove (1531) and the second ratchet (154) to move away from each other; An overrunning clutch (162) is provided in the second fixed shaft (112), and the overrunning clutch (162) is used to prevent the third ratchet (161) from rotating when the direct-connection section (121) rotates upward around the frame body (11), and the second pawl (154) is fed and locked on the third ratchet (161), and is used to prevent the third ratchet (161) from rotating along with the direct-connection section (121) when the direct-connection section (121) rotates downward around the frame body (11).

7. The progressive curvature generator according to any one of claims 2 to 3, characterized in that: The number of the extension sections (122) is greater than or equal to two, and among all the extension sections (122), the preset angles β of all the extension sections (122) are the same, or the preset angles β of at least two of the extension sections (122) are different.

8. A variable curvature X-ray detection device, characterized in that: include: The progressive curvature generator (10) according to any one of claims 1 to 7; A flexible X-ray detection panel (100), wherein the left end of the flexible X-ray detection panel (100) is fixedly connected to the upper surface of the extension section (122) at the rear end of the bending arm (12) on the left side of the frame body (11), the right end of the flexible X-ray detection panel (100) is fixedly connected to the upper surface of the extension section (122) at the rear end of the bending arm (12) on the right side of the frame body (11), and the middle lower surface between the front and rear ends of the flexible X-ray detection panel (100) is fixedly connected to the middle of the upper surface of the frame body (11).

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