Motion position detection mechanism, medical support and medical X-ray imaging system
The motion position detection mechanism using magnetic field sensing solves the problem of positioning instability caused by potentiometer wear, achieving low-cost and highly stable position detection, which is suitable for medical X-ray imaging systems.
Patent Information
- Application Number
- CN202422310187.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In existing medical X-ray imaging systems, the potentiometer used for longitudinal positioning suffers from wear and tear, resulting in poor positioning stability and affecting positioning accuracy.
A motion position detection mechanism employing magnetic field sensing achieves low-cost and wear-free position detection by leveraging the difference in magnetic field distribution between the sensing module and the measured module. It utilizes a Hall sensor to sense the magnetic field strength to determine the position.
It improves the stability and accuracy of positioning, reduces costs, and avoids contact wear between the sensing module and the module under test.
Smart Images
Figure CN223529447U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical equipment, and more particularly to a motion position detection mechanism, and a medical stent and medical X-ray imaging system including the same. Background Technology
[0002] In medical X-ray imaging systems installed using a suspension method, the X-ray tube must be able to move freely in both the lateral and longitudinal directions to achieve 3D full-range angle exposure. Lateral positioning is primarily used for high-precision control of the SID (Source-to-Image-Detector distance), so encoders are typically used for precise positioning. As for the longitudinal direction, since it does not have the same stringent high-precision requirements, potentiometers, which are relatively inexpensive, are often used for coarse positioning. However, potentiometers are prone to wear and tear, leading to decreased stability after long-term use, which in turn affects the accuracy of longitudinal positioning. Utility Model Content
[0003] The purpose of this invention is to provide a motion position detection mechanism that is low in cost and has good stability.
[0004] Another objective of this invention is to provide a medical stent with a low-cost and highly stable motion position detection mechanism.
[0005] Another objective of this invention is to provide a medical X-ray imaging system with a low-cost and highly stable motion position detection mechanism.
[0006] This invention provides a motion position detection mechanism. A first structure is capable of moving relative to a second structure to at least one judgment position. The motion position detection mechanism is used to determine the judgment position of the first structure relative to the second structure. The motion position detection mechanism includes a detection unit. The detection unit includes a sensing module and at least one measured module. The sensing module is mounted on the first structure. The measured module is mounted on the second structure. Each measured module corresponds to a judgment position. Each measured module has a magnetic field distribution that is distinct from the other measured modules. When the first structure is located at any judgment position, the sensing module can sense the magnetic field distribution of the measured module corresponding to that judgment position.
[0007] This motion position detection mechanism is less expensive than an encoder, and since magnetic field sensing does not require the sensing module and the module being tested to be in contact, there is no wear problem, which helps to improve the stability of use.
[0008] In another illustrative embodiment of the motion position detection mechanism, the first structure is capable of moving relative to the second structure to several determination positions. The detection unit includes several modules under test. Each module under test has several sensing elements. Each sensing module includes several sensors. When the first structure is located at any determination position, each sensor of the sensing module is positioned relative to a sensing element of the module under test corresponding to that determination position, so that each sensor can sense the magnetic field strength of the sensing element opposite it. This structure is simple and helps reduce costs.
[0009] In another illustrative embodiment of the motion position detection mechanism, the first structure is capable of moving relative to the second structure along a first direction and in the opposite direction, and can move to at least one locking position. A judgment position corresponding to each locking position is provided both in front of and behind it along the first direction. The motion position detection mechanism has two detection units. The tested module of one detection unit corresponds to the judgment position located in front of each locking position along the first direction, and the tested module of the other detection unit corresponds to the judgment position located behind each locking position along the first direction. This allows for determining the locking position to be entered before the first structure enters each locking position along the first direction and in the opposite direction.
[0010] In another illustrative embodiment of the motion position detection mechanism, the sensing modules of the two detection units are arranged along a first direction. The two measured modules corresponding to the two judgment positions at each locked position are arranged along the first direction, wherein the sensing module located at the front along the first direction and the measured module located at the rear along the first direction belong to the same detection unit, and the sensing module located at the rear along the first direction and the measured module located at the front along the first direction belong to the same detection unit. This helps save space.
[0011] In another illustrative embodiment of the motion position detection mechanism, when the first structure is in any locked position, the sensing module located at the front along the first direction can sense the magnetic field distribution of the measured module located at the front along the first direction, and the sensing module located at the rear along the first direction can sense the magnetic field distribution of the measured module located at the rear along the first direction. This can be used to determine the entered locked position.
[0012] In another illustrative embodiment of the motion position detection mechanism, the motion position detection mechanism further includes a connector. For each locked position corresponding to two judged positions and two tested modules, a connector is located between the two tested modules along a first direction and is fixedly connected to the two tested modules. Each connector has a socket. When the first structure is in any locked position, the plug provided on the first structure can be inserted into the socket of the connector corresponding to that locked position to fix the relative position of the first structure and the second structure.
[0013] In another illustrative embodiment of the motion position detection mechanism, each measured module includes a body. The body has a slot for each sensing part. A magnet can be inserted and fixed in the slot. This structure is simple and easy to manufacture.
[0014] In another illustrative embodiment of the motion position detection mechanism, the magnet is a magnetic steel to obtain better magnetic field stability.
[0015] In another illustrative embodiment of the motion position detection mechanism, the sensor is a Hall sensor to obtain better stability.
[0016] This invention also provides a medical stent, comprising a first structure, a second structure, and the aforementioned motion position detection mechanism. The first structure is capable of moving relative to the second structure to at least one judgment position. The motion position detection mechanism is used to determine the judgment position of the first structure relative to the second structure. A sensing module is mounted on the first structure. A module under test is mounted on the second structure. Each module under test corresponds to a judgment position. When the first structure is located at any judgment position, the sensing module can sense the magnetic field distribution of the module under test corresponding to that judgment position. This motion position detection mechanism for the medical stent has a lower cost compared to an encoder, and because magnetic field sensing does not require contact between the sensing module and the module under test, there is no wear problem, which is beneficial for improving operational stability.
[0017] In another illustrative embodiment of the medical stent, the second structure has a rolling groove extending along its length. The rolling groove opens on one side along its width. The first structure has a roller with its axis parallel to the width direction. The roller extends into the rolling groove from the opening and overlaps the groove wall along its height direction, enabling it to roll within the rolling groove in both the length direction and the opposite direction. The test module is mounted on the bottom wall of the rolling groove along its width direction and is spaced apart from the roller along its width direction. This structure is compact and space-saving.
[0018] This invention also provides a medical X-ray imaging system, which includes the aforementioned medical stent. The motion position detection mechanism of this medical stent is less expensive than an encoder, and because magnetic field sensing eliminates the need for contact between the sensing module and the module being measured, it avoids wear issues and improves operational stability.
[0019] In another illustrative embodiment of the medical X-ray imaging system, the first structure is a telescopic frame capable of extending and retracting along the height direction. The second structure is a longitudinal track extending along the length direction. The telescopic frame is movably connected to the longitudinal track along the length direction and the opposite direction of the length direction. The medical X-ray imaging system also includes an X-ray tube and a transverse track. The X-ray tube is mounted on the telescopic frame. The telescopic frame is actuable to move the X-ray tube relative to the longitudinal track along the height direction and the opposite direction of the height direction. The longitudinal track is movably connected to the transverse track along the width direction and the opposite direction of the width direction. This allows the position of the X-ray tube to be adjusted in the height, width, and length directions. Attached Figure Description
[0020] The following figures are for illustrative purposes only and do not limit the scope of the present invention.
[0021] Figure 1 This is used to illustrate a first illustrative embodiment of a motion position detection mechanism.
[0022] Figure 2 This is a schematic diagram of the sensing module and the module under test.
[0023] Figures 3A to 3C This combination is used to illustrate the magnet mounting configuration of the sensing units of the three tested modules.
[0024] Figures 4A to 4D This is used to illustrate a second illustrative embodiment of the motion position detection mechanism.
[0025] Figure 5 and Figure 6 This is a third illustrative embodiment used to illustrate the motion position detection mechanism.
[0026] Figure 7 An illustrative embodiment of a medical stent is used to illustrate this.
[0027] Figure 8 An illustrative embodiment of a medical X-ray imaging system.
[0028] Label Explanation
[0029] 10 detection units
[0030] 20 sensing modules
[0031] 23 sensors
[0032] 30 modules under test
[0033] P-sensor
[0034] 31 body
[0035] 311 slot
[0036] 33 magnets
[0037] 40 connectors
[0038] 41 sockets
[0039] 50 First Structure
[0040] 51 rollers
[0041] 52 inserts
[0042] 60 Second Structure
[0043] 61 Scroll groove
[0044] 62 opening
[0045] 70 X-ray tube
[0046] 80 horizontal rails
[0047] D1 First Direction
[0048] D2 Second Direction
[0049] L-direction
[0050] H-height direction
[0051] W width direction Detailed Implementation
[0052] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, specific embodiments of the present utility model are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.
[0053] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.
[0054] In this document, terms such as "first" and "second" do not indicate their importance or order, but are only used to distinguish them to facilitate the description of the document.
[0055] To keep the drawings simple, each drawing only schematically shows the parts related to this utility model, and they do not represent the actual structure of the product.
[0056] Figure 1 This is used to illustrate a first illustrative embodiment of a motion position detection mechanism. For example... Figure 1 As shown, the first structure 50 can move relative to the second structure 60 to three judgment positions along the first direction D1 and the opposite direction of the first direction D1. One judgment position of the first structure 50 is represented by a solid line, and the other two judgment positions of the first structure 50 are represented by dashed lines. The motion position detection mechanism is used to determine the judgment position of the first structure 50 relative to the second structure 60.
[0057] like Figure 1 As shown, the motion position detection mechanism includes a detection unit 10. The detection unit 10 includes a sensing module 20 and three tested modules 30. The sensing module 20 is mounted on a first structure 50. The tested modules 30 are mounted on a second structure 60. Each tested module 30 corresponds to a judgment position. Each tested module 30 has a magnetic field distribution distinct from the other tested modules 30. When the first structure 50 is located at any judgment position, the sensing module 20 can sense the magnetic field distribution of the tested module 30 corresponding to that judgment position.
[0058] In use, when the first structure 50 moves relative to the second structure 60 to any judgment position, the sensing module 20 can sense the magnetic field distribution of the tested module 30 corresponding to that judgment position. Since each tested module 30 has a magnetic field distribution different from other tested modules 30, the judgment position of the first structure 50 can be determined by the magnetic field distribution sensed by the sensing module 20.
[0059] This motion position detection mechanism is less expensive than an encoder, and since magnetic field sensing does not require the sensing module and the module being tested to be in contact, there is no wear problem, which helps to improve the stability of use.
[0060] In one illustrative application scenario of this motion position detection mechanism, for example, an additional detection device (such as, but not limited to, an infrared sensor) can be used to detect whether the first structure 50 has reached a judgment position. However, this detection device cannot determine which judgment position has been reached. When the detection device detects that the first structure 50 has reached the judgment position, the magnetic field distribution sensed by the sensing module 20 can determine which judgment position the first structure 50 is in. This helps to improve the accuracy of the judgment result.
[0061] Figure 2 This is a schematic diagram of the sensing module and the module under test. Specifically, as shown... Figure 2 As shown, each module under test 30 has two sensing units P. Each sensing unit P can be configured with either a magnet installed or without a magnet installed. Figure 2The sensor P on the upper side of the module under test 30 shown in the diagram has a magnet 33 mounted on it, while the sensor P on the lower side does not have a magnet mounted on it. It can be understood that the magnet 33 mounted on the sensor P is part of the module under test 30.
[0062] The combination of magnet mounting configurations of the two sensing units P of each module under test 30 is distinct from the combination of magnet mounting configurations of the two sensing units P of other modules under test 30. Figures 3A to 3C This shows the combination of magnet mounting configurations for the sensing units of the three tested modules 30, which are sequentially arranged... Figure 3A , Figure 3B and Figure 3C The combinations of magnet mounting configurations for the sensing units P of the three tested modules 30 are as follows: the upper sensing unit P has a magnet 33 mounted on it, and the lower sensing unit P has a magnet 33 mounted on it; the upper sensing unit P has a magnet 33 mounted on it, and the lower sensing unit P has no magnet mounted on it; and the upper sensing unit P has no magnet mounted on it, and the lower sensing unit P has a magnet 33 mounted on it. This structure allows each tested module 30 to have a magnetic field distribution that is distinct from the other tested modules 30.
[0063] Accordingly, such as Figure 2 As shown, the sensing module 20 includes two sensors 23. When the first structure 50 is in any judgment position, each sensor 23 of the sensing module 20 is positioned opposite a sensing part P of the measured module 30 corresponding to that judgment position along a second direction D2, so that each sensor 23 can sense the magnetic field strength of the sensing part P opposite it, wherein the second direction D2 is, for example, perpendicular to the first direction D1. This structure is simple and helps reduce costs.
[0064] like Figure 2 As shown, in the illustrative embodiment, each measured module 30 includes a body 31. The body 31 has a slot 311 at each sensing part P. A magnet 33 can be inserted into and fixed in the slot 311. The magnet 33 is fixed in the slot 311, for example, by adhesive. This structure is simple and easy to manufacture. The magnet 33 is, for example, a magnetic steel, which has good magnetic field stability, but is not limited thereto. In other illustrative embodiments, the magnet can also be made of other materials. The sensor 23 is, for example, a Hall sensor, which has good stability, but is not limited thereto. In other illustrative embodiments, the sensor 23 can also be other types of magnetic field sensors. The sensing distance of the Hall sensor is, for example, 5-30 mm, preferably 5-15 mm.
[0065] In other illustrative embodiments, the number of determination positions can be adjusted as needed, and the number of modules under test 30 can be adjusted accordingly based on the number of determination positions. The number of sensing units P in the module under test 30 and the number of sensors 23 in the sensing module 20 can also be adjusted accordingly as needed.
[0066] It is understandable that when there is only one position to be determined, a test module 30 can be set accordingly. The test module 30 can have a sensing unit P, and the sensing module 20 can have a sensor 23.
[0067] Figures 4A to 4D This illustrates a second illustrative embodiment of a motion position detection mechanism. The motion position detection mechanism of this illustrative embodiment is similar to... Figure 1 The similarities and differences between the motion position detection mechanisms shown will not be repeated here; the differences are described below. Figure 4A As shown, the first structure 50 can move relative to the second structure 60 to three locking positions along the first direction D1 and the opposite direction of the first direction D1. Figure 4A The three positions of the first structure 50 shown are the three locking positions. A judgment position corresponding to each locking position is set both in front of and behind it along the first direction D1. Figure 4B The six positions of the first structure 50 shown are the six judgment positions, of which the two upper judgment positions correspond to Figure 4A The upper-middle locking position corresponds to the two middle judgment positions. Figure 4A The middle locking position corresponds to the two judgment positions on the bottom. Figure 4A The locking position is located on the lower middle side. The motion position detection mechanism has two detection units 10. Figures 4A to 4D In the diagram, one detection unit 10 is shown in red, and the other detection unit 10 is shown in blue. For ease of understanding, Figure 4C and Figure 4D The two detection units 10 are shown respectively. The red detection unit 10 has a test module 30 corresponding to the judgment position in front of each locking position along the first direction D1, and the blue detection unit 10 has a test module 30 corresponding to the judgment position behind each locking position along the first direction D1.
[0068] Thus, before the first structure 50 enters each locking position along the first direction D1, the blue detection unit 10 can be used to determine the locking position that the first structure 50 is about to enter. Specifically, the magnetic field distribution sensed by the sensing module 20 of the blue detection unit 10 can determine the judgment position reached by the first structure 50, and the corresponding locking position can be determined based on this judgment position, which is the locking position that is about to be entered. Before the first structure 50 enters each locking position along the opposite direction of the first direction D1, the red detection unit 10 can be used to determine the locking position that is about to be entered. This can be used to determine which locking position the first structure 50 is about to enter before it enters each locking position along the first direction D1 and the opposite direction of the first direction D1. In use, when it is determined that the locking position to be entered is the target locking position, the locking mechanism can be controlled to prepare for locking, for example.
[0069] like Figures 4A to 4D As shown in the schematic embodiment, the sensing modules 20 of the two detection units 10 are arranged along the first direction D1. The two test modules 30 corresponding to the two judgment positions at each locking position are arranged along the first direction D1, wherein the sensing module 20 located at the front along the first direction D1 and the test module 30 located at the rear along the first direction D1 belong to the same detection unit 10, and the sensing module 20 located at the rear along the first direction D1 and the test module 30 located at the front along the first direction D1 belong to the same detection unit 10. This helps to save space.
[0070] like Figures 4A to 4D As shown in the illustrative embodiment, when the first structure 50 is in any locked position, for the two measured modules 30 corresponding to the two judgment positions corresponding to that locked position, the sensing module 20 located on the front side along the first direction D1 can sense the magnetic field distribution of the measured module 30 located on the front side along the first direction D1, and the sensing module 20 located on the rear side along the first direction D1 can sense the magnetic field distribution of the measured module 30 located on the rear side along the first direction D1. This can be used to determine the entered locked position.
[0071] Figure 5 and Figure 6 This is a third illustrative embodiment of a motion position detection mechanism. The motion position detection mechanism of this illustrative embodiment is similar to... Figures 4A to 4D The similarities and differences between the motion position detection mechanisms shown will not be repeated here; the differences are described below. In this illustrative embodiment, as... Figure 5As shown, the motion position detection mechanism also includes a connector 40. For each locked position corresponding to two judgment positions, two tested modules 30 are positioned between these two tested modules 30 along the first direction D1 and are fixedly connected. The two tested modules 30 corresponding to the two judgment positions are connected into a whole by a connector 40, which facilitates installation. The combination of the body 31 of the two tested modules 30 and the connector 40 is, for example, an integral structure manufactured by a one-piece molding process, which facilitates processing.
[0072] like Figure 5 and Figure 6 As shown, the connector 40 has, for example, a socket 41, and the first structure 50 is connected to, for example, a plug 52 that can move relative to the first structure 50 along the second direction D2 and the opposite direction of the second direction D2. When the first structure 50 is in any locked position, the plug 52 can be inserted into the socket 41 of the connector 40 corresponding to the locked position under the action of the spring force, so as to fix the relative position of the first structure 50 and the second structure 60. In use, when the detection unit 10 determines that the lock position to be entered is the target lock position, the plug 52 can be released (before this, the plug 52 is locked in a state where it cannot be inserted into the socket 41), so that the plug 52 abuts against the body 31 of the module under test and the connector 40 under the action of the spring force, until the first structure 50 moves to the target lock position, and the plug 52 is inserted into the socket 41 under the action of the spring force, thereby fixing the first structure 50 in the target lock position.
[0073] This invention also provides a medical stent, which, for example, serves as part of a medical X-ray imaging system to support the X-ray tube of the system, but is not limited thereto. In an illustrative embodiment of the medical stent, the stent includes a first structure 50, a second structure 60, and the aforementioned motion position detection mechanism. The first structure 50 is movable relative to the second structure 60 to at least one judgment position. The motion position detection mechanism is used to determine the judgment position of the first structure 50 relative to the second structure 60. A sensing module 20 is mounted on the first structure 50. A measured module 30 is mounted on the second structure 60. Each measured module 30 corresponds to a judgment position. When the first structure 50 is located in any judgment position, the sensing module 20 can sense the magnetic field distribution of the measured module 30 corresponding to that judgment position. This motion position detection mechanism for the medical stent has a lower cost compared to an encoder, and since magnetic field sensing does not require contact between the sensing module and the measured module, there is no wear problem, which is beneficial for improving the stability of use.
[0074] Figure 7 This is used to illustrate another illustrative embodiment of a medical stent. For example... Figure 7As shown, in another illustrative embodiment of the medical stent, the second structure 60 has a rolling groove 61 extending along the length direction L, which is parallel to the first direction D1. The rolling groove 61 opens to form an opening 62 on one side along the width direction W, wherein the width direction W is perpendicular to the length direction L. The first structure 50 has a roller 51 with its axis parallel to the width direction W. The roller 51 extends into the rolling groove 61 from the opening 62 and overlaps the groove wall of the rolling groove 61 along the height direction H, so that it can roll in the rolling groove 61 along the length direction L and the opposite direction of the length direction L, wherein the height direction H is perpendicular to the width direction W and the length direction L. The test module 30 is mounted on the bottom wall of the rolling groove 61 along the width direction W and is spaced apart from the roller 51 along the width direction W. This structure is compact and helps to save space. It can be understood that the number of rolling grooves 61 and rollers 51 can be set as needed for the stability of the support. Sensing module 20 ( Figure 7 (Not shown in the image) For example, it is positioned between two rollers 51 arranged along the length direction L.
[0075] This invention also provides a medical X-ray imaging system, which includes the aforementioned medical stent. The motion position detection mechanism of this medical stent is less expensive than an encoder, and because magnetic field sensing eliminates the need for contact between the sensing module and the module being measured, it avoids wear issues and improves operational stability.
[0076] Specifically, such as Figure 8 As shown, in the illustrative embodiment, the first structure 50 is a telescopic frame capable of extending and retracting along the height direction H. The second structure 60 is a longitudinal track extending along the length direction L. The telescopic frame is movably connected to the longitudinal track along the length direction L and the opposite direction of the length direction L. The medical X-ray imaging system also includes an X-ray tube 70 and a transverse track 80. The X-ray tube 70 is mounted on the telescopic frame. The telescopic frame is operable to move the X-ray tube 70 relative to the longitudinal track along the height direction H and the opposite direction of the height direction H. The longitudinal track is movably connected to the transverse track 80 along the width direction W and the opposite direction of the width direction W. The height direction H, width direction W, and length direction L are, for example, perpendicular to each other. This allows the position of the X-ray tube 70 in the height direction H, width direction W, and length direction L to be adjustable. Each locking position of the first structure 50 mentioned above corresponds, for example, to an exposure position of the X-ray tube 70.
[0077] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
[0078] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent implementation schemes or modifications made without departing from the spirit of the present utility model, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present utility model.
Claims
1. A motion position detection mechanism, wherein a first structure (50) is movable relative to a second structure (60) to at least one judgment position, the motion position detection mechanism being used to determine the judgment position of the first structure (50) relative to the second structure (60), characterized in that, The motion position detection mechanism includes a detection unit (10), and the detection unit (10) includes: A sensing module (20) is mounted on the first structure (50); and At least one module under test (30) is installed in the second structure (60). Each module under test (30) corresponds to a judgment position. Each module under test (30) has a magnetic field distribution that is different from the other modules under test (30). When the first structure (50) is located in any of the judgment positions, the sensing module (20) can sense the magnetic field distribution of the module under test (30) corresponding to the judgment position.
2. The motion position detection mechanism as described in claim 1, characterized in that, The first structure (50) can move relative to the second structure (60) to several of the judgment positions. The detection unit (10) is provided with several of the tested modules (30). Each tested module (30) has several sensing parts (P). The sensing module (20) includes several sensors (23). When the first structure (50) is located at any of the judgment positions, each of the sensors (23) of the sensing module (20) is positioned opposite to a sensing part (P) of the tested module (30) corresponding to the judgment position, so that each sensor (23) can sense the magnetic field strength of the sensing part (P) opposite to its position.
3. The motion position detection mechanism as described in claim 1, characterized in that, The first structure (50) is capable of moving relative to the second structure (60) along the first direction (D1) and in the opposite direction of the first direction (D1), and is capable of moving to at least one locked position. A judgment position corresponding to the locked position is provided in front of and behind each locked position along the first direction (D1). The motion position detection mechanism is provided with two detection units (10). The measured module (30) of one detection unit (10) corresponds to the judgment position located in front of each locked position along the first direction (D1) corresponding to each locked position. The measured module (30) of the other detection unit (10) corresponds to the judgment position located behind each locked position along the first direction (D1) corresponding to each locked position.
4. The motion position detection mechanism as described in claim 3, characterized in that, The sensing modules (20) of the two detection units (10) are arranged along the first direction (D1), and the two test modules (30) corresponding to the two judgment positions corresponding to each locking position are arranged along the first direction (D1). The sensing module (20) located at the front along the first direction (D1) and the test module (30) located at the rear along the first direction (D1) belong to the same detection unit (10). The sensing module (20) located at the rear along the first direction (D1) and the test module (30) located at the front along the first direction (D1) belong to the same detection unit (10).
5. The motion position detection mechanism as described in claim 4, characterized in that, When the first structure (50) is in any of the locked positions, the sensing module (20) located on the front side along the first direction (D1) can sense the magnetic field distribution of the tested module (30) located on the front side along the first direction (D1), and the sensing module (20) located on the rear side along the first direction (D1) can sense the magnetic field distribution of the tested module (30) located on the rear side along the first direction (D1).
6. The motion position detection mechanism as described in claim 4, characterized in that, The motion position detection mechanism further includes a connector (40). For the two test modules (30) corresponding to the two judgment positions corresponding to each of the locking positions, a connector (40) is located between the two test modules (30) along the first direction (D1) and is fixedly connected to the two test modules (30). Each connector (40) has a socket (41). When the first structure (50) is located in any of the locking positions, the plug (52) provided on the first structure (50) can be inserted into the socket (41) of the connector (40) corresponding to the locking position to fix the relative position of the first structure (50) and the second structure (60).
7. The motion position detection mechanism as described in claim 2, characterized in that, Each of the tested modules (30) includes a body (31), and the body (31) has a slot (311) in each of the sensing parts (P), in which a magnet (33) can be inserted and fixed.
8. The motion position detection mechanism as described in claim 7, characterized in that, The magnet (33) is a magnetic steel, and / or the sensor (23) is a Hall sensor.
9. A medical stent, comprising a first structure (50) and a second structure (60), wherein the first structure (50) is movable relative to the second structure (60) to at least one determined position, characterized in that, The medical stent further includes a motion position detection mechanism as described in any one of claims 1 to 8, the motion position detection mechanism being used to determine the judgment position of the first structure (50) relative to the second structure (60), the sensing module (20) being installed on the first structure (50), the tested module (30) being installed on the second structure (60), each tested module (30) corresponding to one judgment position, and when the first structure (50) is located at any of the judgment positions, the sensing module (20) is able to sense the magnetic field distribution of the tested module (30) corresponding to the judgment position.
10. The medical stent as described in claim 9, characterized in that, The second structure (60) has a rolling groove (61) extending along the length direction (L), the rolling groove (61) opening to form an opening (62) on one side along the width direction (W), the first structure (50) has a roller (51) with its axis parallel to the width direction (W), the roller (51) extending into the rolling groove (61) from the opening (62) and overlapping the groove wall of the rolling groove (61) along the height direction (H) so that it can roll in the rolling groove (61) along the length direction (L) and the opposite direction of the length direction (L), the test module (30) is installed on the bottom wall of the rolling groove (61) along the width direction (W) and is spaced apart from the roller (51) along the width direction (W).
11. A medical X-ray imaging system, characterized in that, Including the medical stent as described in claim 9 or 10.
12. The medical X-ray imaging system as described in claim 11, characterized in that, The first structure (50) is a telescopic frame capable of telescopic extension along the height direction (H), and the second structure (60) is a longitudinal track extending along the length direction (L). The telescopic frame is movably connected to the longitudinal track along the length direction (L) and in the opposite direction of the length direction (L). The medical X-ray imaging system further includes: A ball tube (70) is mounted on the telescopic frame, which is operable to move the ball tube (70) relative to the longitudinal track in the height direction (H) and the opposite direction of the height direction (H); and A transverse track (80) is provided, and the longitudinal track is movably connected to the transverse track (80) in the width direction (W) and in the opposite direction of the width direction (W).