Movement mechanism and X-ray imaging equipment
By designing a moving mechanism including guide rails, cogs, gears, drivers and guides, the circular arc movement of the X-ray tube assembly relative to the detector is achieved, and the problem of only two-dimensional imaging in the prior art is solved, and multi-angle imaging and tomography functions are realized.
Patent Information
- Application Number
- CN202421235669.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing C-arm structure of the C-arm X-ray imaging device can only achieve two-dimensional plane imaging, and cannot obtain X-ray images from multiple different angles, limiting the demand for new scenes such as tomography.
A moving mechanism is designed, including guide rails, cogs, gears, drivers and guides. Through the coordination between gears and cogs and power drive of the driver, the circular arc movement of the X-ray tube assembly relative to the detector is realized, and multi-angle imaging is realized.
The tomography function of X-ray imaging equipment is realized, and images in different directions can be collected during arc movement, meeting the needs of new scenes such as tomography, and improving the diversity and accuracy of imaging.
Smart Images
Figure CN222676241U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical equipment, and in particular to a motion mechanism and an X-ray imaging device. Background Art
[0002] Interventional C-arm X-ray imaging equipment is one of the most commonly used interventional devices and is used for diagnosis of patients' breast, heart, liver, kidney, brain, lungs and other aspects.
[0003] In the related art, the C-arm of the X-ray imaging device is a device in which the X-ray tube assembly and the detector rotate synchronously around the rotation axis to achieve the positioning requirement, that is, the X-ray tube assembly and the detector must remain facing each other. However, such a C-arm structure has the following problems: the imaging effect of the X-ray tube assembly on the detector is only a two-dimensional plane, and it is impossible to obtain images irradiated by X-rays at multiple different angles, which is not conducive to meeting the requirements of new scenarios such as tomography. Utility Model Content
[0004] The embodiments of the present application provide a motion mechanism and an X-ray imaging device, which are used to improve the problem in the related art that the imaging effect of the X-ray tube assembly on the detector is only a two-dimensional plane, and it is impossible to obtain images irradiated by X-rays at multiple different angles, which is not conducive to meeting the requirements of new scenarios such as tomography.
[0005] In the first aspect, an embodiment of the present application provides a motion mechanism, including a first structural member, including a guide rail, the guide rail is formed with a guide groove, the guide groove extends along the length direction of the guide rail, and the guide rail is also formed with a plurality of tooth grooves, and the plurality of tooth grooves are spaced apart along the length direction of the guide rail; and a second structural member, including a driver, a gear, a connecting seat and a guide, the gear is meshed with the tooth groove, the output shaft of the driver is fixedly connected to the gear, and is used to drive the gear to move along the length direction of the guide rail; the connecting seat is movably mounted on the output shaft of the driver and is fixed relative to the fixed seat of the driver, and a boss is protruding from the connecting seat; part of the guide is located in the guide groove, the guide is mounted on the boss, and the guide can move along the length direction of the guide rail with the gear.
[0006] In some embodiments, the first structural member further includes a chain fixed to the guide rail and extending along the length direction of the guide rail, and the chain is formed with a plurality of tooth grooves.
[0007] In some of the embodiments, the first structural member further includes a plurality of connecting posts fixed to the guide rail and spaced apart along the length direction of the guide rail, with a tooth groove formed between every two adjacent connecting posts.
[0008] In some of the embodiments, the guide rail has two guide grooves, which are respectively located on two opposite sides of the guide rail, and the second structural member includes guides corresponding to each guide groove.
[0009] In some embodiments, the two guide grooves include a first guide groove and a second guide groove, a tooth groove is formed at the bottom of the first guide groove, and a portion of the gear is located in the first guide groove.
[0010] In some embodiments, the second structural member includes four guides, the four guides include two first guides and two second guides, the two first guides are partially located in the first guide groove, and the two first guides are respectively located on opposite sides of the gear along the length direction of the guide rail, and the two second guides are partially located in the second guide groove.
[0011] In some of the embodiments, the guide is movably sleeved on the boss, and the guide can roll along the length direction of the guide rail.
[0012] In some embodiments, the length direction of the guide rail is along an arc direction.
[0013] In some of the embodiments, a plurality of tooth grooves are formed at the bottom of the guide groove, and a portion of the gear is located in the guide groove.
[0014] In some of the embodiments, it also includes a code disk, which is fixed relative to one of the guide rail and the connecting seat, and the code disk is provided with a plurality of detection parts spaced apart along the length direction of the guide rail; and a photoelectric sensor, which is fixed relative to the other one of the guide rail and the connecting seat, and the photoelectric sensor is used in conjunction with the code disk.
[0015] In the second aspect, an embodiment of the present application provides an X-ray imaging device, including the above-mentioned motion mechanism; a base, fixedly connected to one of the guide rail and the connecting seat; an X-ray tube assembly, fixedly connected to the other of the guide rail and the connecting seat; and a detector, fixedly connected to the base and arranged opposite to and spaced apart from the X-ray tube assembly.
[0016] In some of the embodiments, the length direction of the guide rail is along the arc direction, and the center of the arc is located in the plane where the detection surface of the detector is located.
[0017] In the motion mechanism and X-ray imaging equipment of the embodiments of the present application, the gear is fixed relative to the output shaft of the driver, the connecting seat is fixed relative to the fixing seat of the driver, and the guide is sleeved on the convex column on the connecting seat. When the driver drives the gear to move along the length direction of the guide rail, the driver, gear, connecting seat and guide in the second structural component can be moved together relative to the first structural component along the length direction of the guide rail.
[0018] Among them, the driver is a power device for the second structural member to move relative to the first structural member along the length direction of the guide rail, the gear and the tooth groove cooperate to form a transmission device for the second structural member to move relative to the first structural member along the length direction of the guide rail, and the guide and the guide groove cooperate to form a guide device for the second structural member to move relative to the first structural member along the length direction of the guide rail. The driver in the power device, the gear in the transmission device and the guide in the guide device in the above-mentioned design move together relative to the first structural member, which is conducive to improving the structural compactness of the motion mechanism and improving the stability and reliability of the movement of the second structural member in the motion mechanism relative to the first structural member.
[0019] The motion mechanism of the embodiment of the present application is used in an X-ray imaging device, and can drive the X-ray tube assembly to move relative to the detector when the second structure moves relative to the first structure, thereby realizing the tomography function of the X-ray imaging device. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 is a schematic diagram of the structure of the motion mechanism provided in some embodiments of the present application;
[0022] Figure 2 yes Figure 1 An exploded structural schematic diagram of a motion mechanism shown;
[0023] Figure 3 yes Figure 1 Another exploded structural schematic diagram of the motion mechanism shown;
[0024] Figure 4 yes Figure 1 A schematic cross-sectional structure diagram of a motion mechanism is shown;
[0025] Figure 5 yes Figure 1 A schematic diagram of the structure of the motion mechanism shown in another perspective;
[0026] Figure 6 is a schematic structural diagram of a first structural member in a motion mechanism provided in other embodiments of the present application;
[0027] Figure 7 is a schematic diagram of the structure of the motion mechanism provided by some other embodiments of the present application;
[0028] Figure 8is a schematic diagram of the structure of an X-ray imaging device provided in some embodiments of the present application;
[0029] Fig. 9 yes Figure 8 A schematic diagram of the exploded structure of an X-ray imaging device is shown.
[0030] Description of reference numerals:
[0031] 1. Sports mechanism;
[0032] 10. first structural member; 11. guide rail; 111. guide groove; 111a. first guide groove; 111b. second guide groove; 1111. first wall surface; 1112. second wall surface; 12. connecting column; 121. tooth groove;
[0033] 20. Second structural member; 21. Driver; 211. Output shaft; 212. Fixed seat; 213. Protrusion; 22. Gear; 23. Connecting seat; 231. Boss; 232. Fixed portion; 233. Connecting portion; 234. Fixed plate; 24. Guide; 24a. First guide; 24b. Second guide; 241. First side surface; 242. Second side surface; 26. Bearing; 27. Flat key;
[0034] 30. Code disk; 31. Detection unit;
[0035] 40. Photoelectric sensor;
[0036] 2. X-ray imaging equipment; 3. base; 4. X-ray tube assembly; 5. detector; 501. detection surface;
[0037] m, length direction. DETAILED DESCRIPTION
[0038] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
[0039] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.
[0040] See also Figures 1 to 5 An embodiment of the present application provides a motion mechanism 1 , which includes a first structural component 10 and a second structural component 20 .
[0041] The first structural member 10 includes a guide rail 11 , which is formed with a guide groove 111 extending along the length direction m of the guide rail 11 , and further formed with a plurality of tooth grooves 121 , which are spaced apart along the length direction m of the guide rail 11 .
[0042] The second structural member 20 includes a driver 21, a gear 22, a connecting seat 23 and a guide 24. The gear 22 is meshed with the tooth groove 121. The output shaft 211 of the driver 21 is fixedly connected to the gear 22, and is used to drive the gear 22 to move along the length direction m of the guide rail 11. The connecting seat 23 is movably sleeved on the output shaft 211 of the driver 21 and is fixed relative to the fixed seat 212 of the driver 21. A convex column 231 is convexly provided on the connecting seat 23. Part of the guide 24 is located in the guide groove 111, and the guide 24 is sleeved on the convex column 231. The guide 24 can move along the length direction m of the guide rail 11 with the gear 22.
[0043] In the above-mentioned design, the gear 22 is fixed relative to the output shaft 211 of the driver 21, the connecting seat 23 is fixed relative to the fixing seat 212 of the driver 21, and the guide 24 is sleeved on the boss 231 on the connecting seat 23. When the driver 21 drives the gear 22 to move along the length direction m of the guide rail 11, the driver 21, the gear 22, the connecting seat 23 and the guide 24 in the second structural component 20 can move together relative to the first structural component 10 along the length direction m of the guide rail 11.
[0044] Among them, the driver 21 is a power device for the second structural member 20 to move relative to the first structural member 10 along the length direction m of the guide rail 11, the gear 22 and the tooth groove 121 cooperate to form a transmission device for the second structural member 20 to move relative to the first structural member 10 along the length direction m of the guide rail 11, and the guide 24 and the guide groove 111 cooperate to form a guide device for the second structural member 20 to move relative to the first structural member 10 along the length direction m of the guide rail 11. The driver 21 in the power device, the gear 22 in the transmission device and the guide 24 in the guide device move together relative to the first structural member 10, which is conducive to improving the structural compactness of the motion mechanism 1 and improving the stability and reliability of the movement of the second structural member 20 in the motion mechanism 1 relative to the first structural member 10.
[0045] For the first structural member 10, the length direction m of the guide rail 11 can be a straight line direction or a curved line direction, such as an arc direction. If the length direction m of the guide rail 11 is a straight line direction, the second structural member 20 can move along the straight line direction relative to the first structural member 10, and if the length direction m of the guide rail 11 is a curved line direction, the second structural member 20 can move along the curved line direction relative to the first structural member 10. The design can be flexibly combined with actual needs. Figure 8 and Fig. 9, the length direction m of the guide rail 11 is an arc direction, so that when the motion mechanism 1 is used in the X-ray imaging device 2, the X-ray tube assembly 4 fixed relative to one of the first structural member 10 and the second structural member 20 and the detector 5 fixed relative to the other of the first structural member 10 and the second structural member 20 can move relative to each other along the arc direction, and collect images of the object in different orientations during the movement in the arc direction, so as to realize functions such as tomography; wherein, the center of the arc can be located in the plane where the detection surface 501 of the detector 5 is located, so that the movement center of the second structural member 20 relative to the first structural member 10 will be located on the detection surface 501, so that the X-ray tube assembly 4 can move in an arc along the length direction m of the guide rail 11 with the detector 5 as the center, so as to realize functions such as tomography.
[0046] In an exemplary solution, the X-ray tube assembly 4 is fixed relative to the second structure 20, and the detector 5 is fixed relative to the first structure 10. At this time, if the X-ray tube assembly 4 moves relative to the detector 5, the X-ray tube assembly 4 and the second structure 20 move synchronously, while the detector 5 and the first structure 10 remain stationary, which is conducive to improving the installation stability of the guide rail 11 in the first structure 10 and improving the movement stability of the X-ray tube assembly 4 relative to the detector 5 along the length direction m of the guide rail 11.
[0047] In another exemplary solution, the X-ray tube assembly 4 is fixed relative to the first structural member 10, and the detector 5 is fixed relative to the second structural member 20. At this time, if the X-ray tube assembly 4 moves relative to the detector 5, the X-ray tube assembly 4 and the first structural member 10 move synchronously, while the detector 5 and the second structural member 20 remain stationary, which is conducive to improving the installation stability of the second structural member 20 and improving the assembly stability between the driver 21, the gear 22, the connecting seat 23 and the guide 24 in the second structural member 20.
[0048] Please refer again Figures 1 to 5 There are many ways to form the tooth groove 121 on the guide rail 11. For example, a groove is made on the guide rail 11 to form the tooth groove 121. For another example, a plurality of connecting columns 12 are arranged on the guide rail 11 along the length direction m thereof, and a tooth groove 121 is formed between every two adjacent connecting columns 12. For another example, a chain / conveyor belt extending along the length direction m thereof is arranged on the guide rail 11, and the chain / conveyor belt forms the tooth groove 121. Or a combination of at least two of the above schemes, etc. The embodiment of the present application does not limit the way in which the tooth groove 121 is formed.
[0049] It should be noted that the tooth groove 121 formed by the above-mentioned method of slotting the guide rail 11 and setting the connecting column 12 is fixed and not easy to move, which is conducive to improving the stability of the movement of the gear 22 relative to the tooth groove 121. If a chain / conveyor belt is set on the guide rail 11 to form the tooth groove 121, in order to prevent the chain / conveyor belt from loosening, a tensioning mechanism can also be set on the guide rail 11 to tension the chain / conveyor belt to improve the stability of the movement of the gear 22 relative to the tooth groove 121.
[0050] The tooth groove 121 can be disposed on the outer side of the guide rail 11, for example, on the outer side of the guide rail 11, see Figure 6 The tooth groove 121 may also be disposed on the inner side of the guide rail 11, for example, at the bottom of the guide groove 111 of the guide rail 11, see Figure 5 If the tooth groove 121 is disposed on the outside of the guide rail 11, the gear 22 is located on the outside of the guide rail 11 when meshing with the tooth groove 121, which can reduce the constraints of the gear 22 and the tooth groove 121 when they are meshed and assembled, and improve the assembly efficiency between the gear 22 and the tooth groove 121. If the tooth groove 121 is disposed on the inside of the guide rail 11, the gear 22 is located on the inside of the guide rail 11 when meshing with the tooth groove 121. For example, part of the gear 22 is located in the guide groove 111, which can make at least two sides of the gear 22 constrained by the guide rail 11, and improve the smoothness of the movement of the gear 22 relative to the tooth groove 121.
[0051] The bottom of the guide groove 111 is the portion opposite to the opening of the guide groove 111, that is, the portion close to the bottom wall of the guide groove 111. The tooth groove 121 is designed to be close to the bottom of the guide groove 111, so that the guide 24 can be prevented from contacting the tooth groove 121 and the tooth groove 121 can be prevented from affecting the movement of the guide 24 on the guide groove 111.
[0052] The guide rail 11 may be formed with one guide groove 111, or may be formed with multiple guide grooves 111, for example, two guide grooves 111, three guide grooves 111, etc., without limitation. In the embodiment of the present application, two guide grooves 111 are provided on the guide rail 11, and the two guide grooves 111 are respectively located on opposite sides of the guide rail 11, and the second structural member 20 includes a guide 24 corresponding to each guide groove 111. The above-mentioned design guide rail 11 is provided with two guide grooves 111 and each guide groove 111 is provided with a guide 24, which can simplify the structural design of the guide rail 11 and reduce the manufacturing cost of the guide rail 11 on the basis of ensuring the relative and smooth movement of the first structural member 10 and the second structural member 20.
[0053] Furthermore, the two guide grooves 111 include a first guide groove 111a and a second guide groove 111b, and a tooth groove 121 is formed at the bottom of the first guide groove 111a, and part of the gear 22 is located in the first guide groove 111a. In the above design, one of the two guide grooves 111 is provided with a tooth groove 121, so that the first structural member 10 and the second structural member 20 can be driven to move relative to each other through the cooperation of a gear 22 and the tooth groove 121, which can simplify the structure of the motion mechanism 1. It should be noted that it is also possible to design that each guide groove 111 is provided with a tooth groove 121, and the second structural member 20 includes a gear 22 corresponding to the tooth groove 121 on each guide groove 111, so as to improve the stability of the relative movement of the first structural member 10 and the second structural member 20.
[0054] If the two guide grooves 111 include a first guide groove 111a and a second guide groove 111b, the second structural member 20 includes four guides 24, the four guides 24 include two first guides 24a and two second guides 24b, the two first guides 24a are partially located in the first guide groove 111a, and the two first guides 24a are respectively located on opposite sides of the gear 22 along the length direction m of the guide rail 11, and the two second guides 24b are partially located in the second guide groove 111b. Designing two guides 24 corresponding to each guide groove 111 can further improve the stability of the relative movement between the first structural member 10 and the second structural member 20.
[0055] The first guide 24a and / or the second guide 24b can be an eccentric guide. In this way, when assembling the guide 24, the eccentricity of the eccentric guide can be adjusted so that all the guides 24 are accurately assembled in the corresponding guide groove 111, so that the guide 24 can move steadily and smoothly under the guidance of the wall of the guide groove 111. In the embodiment of the present application, the second guide 24b is an eccentric guide. Since a gear 22 is also installed near the first guide 24a, the eccentricity of the second guide 24b is more convenient to adjust than the eccentricity of the first guide 24a. It should be noted that the first guide 24a and the second guide 24b can also not use eccentric guides, but directly connect with the boss 231 in an unadjustable manner to simplify the adjustment steps during assembly. At this time, the design accuracy requirements for the boss 231, the guide 24 and the guide groove 111 are relatively high.
[0056] See also Figure 3 and Figure 4The guide 24 has a first side surface 241 and a second side surface 242 that are opposite to each other, and the guide groove 111 has a first wall surface 1111 and a second wall surface 1112 that are opposite to each other and extend along the length direction m of the guide rail 11. The first side surface 241 is in contact with the first wall surface 1111, and the second side surface 242 is in contact with the second wall surface 1112, so that the guide 24 can move smoothly along the length direction m of the guide rail 11 under the guidance of the first wall surface 1111 and the second wall surface 1112 of the guide groove 111. The first side surface 241 and the second side surface 242 can be parallel or set at an angle. In the embodiment of the present application, the first side surface 241 and the second side surface 242 are set at an angle, and the distance between the first side surface 241 and the second side surface 242 gradually decreases in the direction from the center to the periphery of the guide 24, so as to facilitate the assembly of the guide 24 in the guide groove 111.
[0057] The guide 24 is sleeved on the convex column 231, and the guide 24 can be fixedly sleeved on the convex column 231, and the guide 24 can slide along the length direction m of the guide rail 11. The guide 24 is sleeved on the convex column 231, and the guide 24 can roll along the length direction m of the guide rail 11. The rolling motion has smaller friction and smaller motion resistance.
[0058] The above-mentioned gear 22 is fixedly connected to the output shaft 211 of the driver 21, which can be: the gear 22 is sleeved on the output shaft 211 of the driver 21, and a flat key 27 is provided between the two to limit the relative rotation between the gear 22 and the output shaft 211, ensuring that the gear 22 can rotate synchronously with the output shaft 211 of the driver 21.
[0059] The connecting seat 23 is fixed relative to the fixing seat 212 of the driver 21 , and can be: a protrusion 213 extending toward the connecting seat 23 is provided on the fixing seat 212 , and the protrusion 213 is connected and fixed to the connecting seat 23 by means of screws or the like.
[0060] The above-mentioned connecting seat 23 is movably mounted on the output shaft 211 of the driver 21, and can be: a bearing 26 is mounted on the output shaft 211 of the driver 21 and is fixed to the inner ring of the bearing 26, and the connecting seat 23 is mounted on the bearing 26 and is fixed to the outer ring of the bearing 26, so as to facilitate the smooth rotation of the output shaft 211 in the connecting seat 23.
[0061] The connecting seat 23 may include a fixing portion 232 and a connecting portion 233. The fixing portion 232 is provided with a convex column 231. The fixing portion 232 is used to realize the installation and fixation of the entire second structural member 20. The connecting portion 233 is movably sleeved on the output shaft 211 of the driver 21 and fixed relative to the fixing seat 212 of the driver 21. The connecting portion 233 and the fixing portion 232 are adjustable. The design of the adjustable connection between the connecting portion 233 and the fixing portion 232 is conducive to adjusting the position of the connecting portion 233, and then adjusting the position of the output shaft 211 of the driver 21 and the gear 22, so that the gear 22 is meshed with the tooth groove 121. Among them, the adjustable connection between the connecting portion 233 and the fixing portion 232 can be: the connecting portion 233 and the fixing portion 232 are connected by screws and nuts, and the holes in the connecting portion 233 and / or the fixing portion 232 for the screws to pass through are elongated holes, so that the relative positions of the connecting portion 233 and the fixing portion 232 can be adjusted along the extension direction of the elongated holes. The bearing 26 may be disposed in the connecting portion 233 .
[0062] The connection seat 23 may further include a fixing plate 234, and the fixing plate 234 fixes the fixing portion 232 to the external device. If the second structural member 20 is fixed relative to the X-ray tube assembly 4, the external device may be the X-ray tube assembly 4; if the second structural member 20 is fixed relative to the detector 5, the external device may be the detector 5, and so on, which is not limited.
[0063] See also Figure 7The motion mechanism 1 also includes a code disk 30 and a photoelectric sensor 40. The code disk 30 is fixed relative to one of the guide rail 11 and the connecting seat 23. The code disk 30 is provided with a plurality of detection parts 31 distributed at intervals along the length direction m of the guide rail 11. The photoelectric sensor 40 is fixed relative to the other one of the guide rail 11 and the connecting seat 23, and the photoelectric sensor 40 is used in conjunction with the code disk 30. In this way, the movement amount of the second structural member 20 relative to the first structural member 10 can be measured by the cooperation of the code disk 30 and the photoelectric sensor 40, so as to realize accurate control of the movement amount of the second structural member 20 relative to the first structural member 10. The above-mentioned design of the motion mechanism 1 includes the code disk 30 and the photoelectric sensor 40, so that the driver 21 can directly select an ordinary DC motor, which can reduce the manufacturing cost compared with selecting a motor with an encoder. The above-mentioned detection part 31 can be a through hole. During the movement of the second structural member 20 relative to the first structural member 10, the photoelectric sensor 40 will move relative to the code disk 30. The arrangement of the above-mentioned multiple detection parts 31 will make the photoelectric sensor 40 pass through the entity part and the through hole part on the code disk 30 in sequence. The photoelectric sensor 40 receives different signals when passing through the entity part and the through hole part on the code disk 30. By accumulating the number of received signals, the movement amount of the photoelectric sensor 40 relative to the code disk 30 can be roughly calculated, and then the movement amount of the second structural member 20 relative to the first structural member 10 can be known. Among them, along the length direction m of the guide rail 11, the spacing between each two adjacent detection parts 31 can be equal. It can be understood that the smaller the spacing between two adjacent detection parts 31, the more accurate the detection result of the movement amount. During production and manufacturing, the spacing between two adjacent detection parts 31 can be designed in combination with actual needs, and there is no limitation on this.
[0064] It should be noted that the code disk 30 and the photoelectric sensor 40 may also be omitted, and a motor with an encoder may be directly used to achieve accurate control of the movement of the second structural member 20 relative to the first structural member 10 .
[0065] See also Figure 8 and Fig. 9 The embodiment of the present application also provides an X-ray imaging device 2, which can be used for diagnosis of the patient's breast, heart, liver, kidney, brain, lungs, etc.
[0066] See also Figure 8 and Fig. 9, the X-ray imaging device 2 includes the above-mentioned motion mechanism 1, base 3, X-ray tube assembly 4 and detector 5. The base 3 is fixedly connected to one of the guide rail 11 and the connecting seat 23, and the X-ray tube assembly 4 is fixedly connected to the other of the guide rail 11 and the connecting seat 23. The detector 5 is fixedly connected to the base 3, and is arranged opposite to and spaced from the X-ray tube assembly 4. In this way, the second structural member 20 in the motion mechanism 1 moves relative to the first structural member 10, which will drive the X-ray tube assembly 4 to move relative to the detector 5, thereby realizing the tomographic shooting function of the X-ray imaging device 2. For example, if the length direction m of the guide rail 11 is along the arc direction, an image can be taken every time the second structural member 20 moves 1° relative to the first structural member 10. Among them, the code disk 30 and the photoelectric sensor 40 are used in conjunction to measure the amount of movement of the second structural member 20 relative to the first structural member 10, so as to realize exposure at the required position.
[0067] In an exemplary solution, the base 3 is fixedly connected to one of the guide rail 11 and the connection seat 23, and the X-ray tube assembly 4 is fixedly connected to the other of the guide rail 11 and the connection seat 23, which can be: the base 3 is fixedly connected to the guide rail 11, and the X-ray tube assembly 4 is fixedly connected to the connection seat 23. Since the detector 5 is fixedly connected to the base 3, the detector 5 is fixed relative to the first structural member 10, and the X-ray tube assembly 4 is fixed relative to the second structural member 20. If the X-ray tube assembly 4 moves relative to the detector 5, the X-ray tube assembly 4 and the second structural member 20 move synchronously, while the detector 5 and the first structural member 10 remain stationary, which is conducive to improving the installation stability of the guide rail 11 in the first structural member 10 and improving the movement stability of the X-ray tube assembly 4 relative to the detector 5 along the length direction m of the guide rail 11.
[0068] In an exemplary solution, the base 3 is fixedly connected to one of the guide rail 11 and the connection seat 23, and the X-ray tube assembly 4 is fixedly connected to the other of the guide rail 11 and the connection seat 23, which can be: the base 3 is fixedly connected to the connection seat 23, and the X-ray tube assembly 4 is fixedly connected to the guide rail 11. Since the detector 5 is fixedly connected to the base 3, the detector 5 is fixed relative to the second structural member 20, and the X-ray tube assembly 4 is fixed relative to the first structural member 10. If the X-ray tube assembly 4 moves relative to the detector 5, the X-ray tube assembly 4 and the first structural member 10 move synchronously, while the detector 5 and the second structural member 20 remain stationary, which is conducive to improving the installation stability of the second structural member 20 and improving the assembly stability between the driver 21, the gear 22, the connection seat 23 and the guide 24 in the second structural member 20.
[0069] If the length direction m of the guide rail 11 is along the arc direction, the center of the arc is located in the plane where the detection surface 501 of the detector 5 is located. In this way, the movement center of the second structure 20 relative to the first structure 10 will be located on the detection surface 501, so that during the entire process of the X-ray tube assembly 4 moving relative to the detector 5, the X-ray tube assembly 4 will not deviate from the detector 5, thereby realizing the tomography function.
[0070] In addition to moving relative to the detector 5 along the length direction m of the guide rail 11, the X-ray tube assembly 4 also moves synchronously with the detector 5. For example, a rotating shaft (not shown in the figure) is installed on the base 3, and the motion mechanism 1, the base 3, the X-ray tube assembly 4 and the detector 5 all rotate around the central axis of the rotating shaft to achieve angle adjustment of the X-ray imaging device, etc. The central axis of the rotating shaft can be parallel to the central axis of the arc extension direction of the guide rail 11, which is not limited.
[0071] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to at least two, for example, two, three, four, etc. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.
[0072] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.
Claims
1. A motion mechanism, characterized in that: include: The first structural member comprises a guide rail, wherein the guide rail is formed with a guide groove, wherein the guide groove extends along the length direction of the guide rail, and wherein the guide rail is further formed with a plurality of tooth grooves, wherein the plurality of tooth grooves are spaced apart and distributed along the length direction of the guide rail; The second structural member includes a driver, a gear, a connecting seat and a guide, the gear is meshed with the tooth groove, the output shaft of the driver is fixedly connected to the gear, and is used to drive the gear to move along the length direction of the guide rail; the connecting seat is movably sleeved on the output shaft of the driver and the connecting seat is fixed relative to the fixed seat of the driver, and a convex column is protruded on the connecting seat; part of the guide is located in the guide groove, the guide is sleeved on the convex column, and the guide can move along the length direction of the guide rail with the gear.
2. The motion mechanism according to claim 1, characterized in that: The first structural member further comprises: A chain is fixed to the guide rail and extends along the length direction of the guide rail, and the chain is formed with a plurality of tooth grooves.
3. The motion mechanism according to claim 1, characterized in that: The first structural member further comprises: A plurality of connecting posts are fixed to the guide rail and are spaced apart along the length direction of the guide rail, and the tooth groove is formed between every two adjacent connecting posts.
4. The motion mechanism according to claim 1, characterized in that: The guide rail has two guide grooves, which are respectively located at two opposite sides of the guide rail, and the second structural member includes the guides corresponding to each guide groove.
5. The motion mechanism according to claim 4, characterized in that: The two guide grooves include a first guide groove and a second guide groove. The tooth groove is formed at the bottom of the first guide groove, and part of the gear is located in the first guide groove.
6. The motion mechanism according to claim 5, characterized in that: The second structural member includes four guides, and the four guides include two first guides and two second guides. The two first guides are both partially located in the first guide groove, and the two first guides are respectively located on opposite sides of the gear along the length direction of the guide rail, and the two second guides are both partially located in the second guide groove.
7. The motion mechanism according to claim 1, characterized in that: The guide is movably sleeved on the convex column, and the guide can roll along the length direction of the guide rail; And / or, the length direction of the guide rail is along the arc direction; And / or, a plurality of tooth grooves are formed at the bottom of the guide groove, and part of the gear is located in the guide groove.
8. The motion mechanism according to claim 1, characterized in that: Also includes: A code disc is fixed relative to one of the guide rail and the connecting seat, and the code disc is provided with a plurality of detection parts spaced apart along the length direction of the guide rail; A photoelectric sensor is fixed relative to the other of the guide rail and the connecting seat, and the photoelectric sensor is used in conjunction with the code disk.
9. An X-ray imaging device, characterized in that: include: The motion mechanism according to any one of claims 1 to 8; A base, fixedly connected to one of the guide rail and the connecting seat; An X-ray tube assembly is fixedly connected to the other of the guide rail and the connecting seat; The detector is fixedly connected to the base and is arranged opposite to and spaced from the X-ray tube assembly.
10. The X-ray imaging device according to claim 9, characterized in that: The length direction of the guide rail is along the arc direction, and the center of the arc is located in the plane where the detection surface of the detector is located.