Drag chain structure applied to O-shaped arm X-ray imaging equipment

Abstract

The drag chain structure applied to the O-shaped arm X-ray imaging equipment comprises a drag chain assembly, a drag chain guide rail and a drag chain tensioning mechanism, the drag chain assembly is U-shaped, and two ends of the drag chain assembly are respectively fixed on the outer ring and the inner ring of the O-shaped arm; the drag chain guide rails comprise the first drag chain guide rail fixed to the outer ring of the O-shaped arm and the second drag chain guide rail fixed to the inner ring of the O-shaped arm, and the first drag chain guide rail and the second drag chain guide rail jointly form an annular operation space to limit the track and posture of the drag chain assembly. The drag chain tensioning mechanism is used for keeping the tensioning state of the drag chain assembly. According to the drag chain structure applied to the X-ray imaging equipment with the O-shaped arm, stable transmission of energy and signals is achieved when the inner ring of the O-shaped arm rotates by more than 360 degrees by optimizing drag chain arrangement and a mechanical structure, the drag chain structure has the advantages of being compact in structure, low in cost, convenient and fast to maintain and the like, the problems of drag chain accumulation and large equipment size in a traditional mode are solved, and the drag chain structure is suitable for popularization and application. And the reliability and the stability of equipment operation are improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a drag chain structure used in O-arm X-ray imaging equipment. Background Technology

[0002] Currently, O-arm X-ray imaging equipment boasts features such as high definition, high efficiency, wide field of view, and the ability to be raised, lowered, and moved, leading to its increasingly widespread application. Particularly in orthopedic surgery and treatment, O-arm X-ray imaging equipment can provide timely and accurate intraoperative confirmation of surgical results, offering precise intraoperative three-dimensional image "maps" for intelligent orthopedic surgical equipment. It is an essential tool in modern, intelligent orthopedic operating rooms.

[0003] The O-arm consists of an inner and outer ring. The outer ring is a fixed component, while the inner ring is a movable component. Components such as the X-ray generator and X-ray receiver are mounted on the inner ring of the O-arm. As the inner ring rotates around the center of the O-arm, the X-ray generator and X-ray receiver, mounted on it, complete the acquisition and transmission of images of the subject from all angles. To ensure image quality and facilitate subsequent software modeling, the image acquisition range must be greater than 360°. The specific workflow of the O-arm X-ray imaging equipment is as follows: When the inner ring of the O-arm is in the starting position, the equipment is in the shooting preparation state; during shooting, the inner ring of the O-arm rotates clockwise by the corresponding angle to acquire images of the subject from different angles, and the equipment is in the shooting completion state; then the inner ring of the O-arm rotates counterclockwise back to the starting position and stops, and the equipment returns to the shooting preparation state.

[0004] During image acquisition, the components on the reciprocating rotating inner ring of an O-arm need to transmit energy and signals with other parts of the machine. Currently, some equipment uses a ring slip ring assembly to achieve energy and signal transmission between the inner ring components of the O-arm. However, slip ring assemblies, especially fiber optic rings, are difficult to manufacture and costly (accounting for 20%-30% of the total equipment investment), and subsequent maintenance is complex and difficult. Another type of equipment uses a traditional cable carrier and cable method for energy and signal transmission. Specifically, redundant length of the cable carrier is reserved between the rotating part and the fixed end, and a figure-eight symmetrical cable routing method is used. When the inner ring rotation angle is greater than 360°, the cable carrier in this method needs to be arranged in layers or spirals, which increases the size of the inner and outer rings of the O-arm, and the overall size and weight of the equipment.

[0005] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a drag chain structure for use in O-arm X-ray imaging equipment to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a drag chain structure for use in O-arm X-ray imaging equipment, and to solve the problems existing in the prior art by optimizing the drag chain layout, trajectory control and mechanical structure.

[0007] To achieve the above and other related objectives, the technical solution provided by this utility model is: a cable chain structure applied in an O-arm X-ray imaging device, comprising a cable chain assembly, cable chain guides, and a cable chain tensioning mechanism; the cable chain assembly is U-shaped, with both ends fixed to the outer and inner rings of the O-arm, respectively; the cable chain guides include a first cable chain guide fixed to the outer ring of the O-arm and a second cable chain guide fixed to the inner ring of the O-arm, the first cable chain guide and the second cable chain guide together forming an annular running space to limit the trajectory and posture of the cable chain assembly; the cable chain tensioning mechanism is used to maintain the tension of the cable chain assembly.

[0008] The preferred technical solution is as follows: the first cable chain guide is annular with a flat U-shaped cross-section; the second cable chain guide includes an upper cable chain guide and a lower cable chain guide, both of which are annular with an L-shaped cross-section. The upper and lower cable chain guides are arranged vertically opposite each other, and their combined height is equal to that of the first cable chain guide; the centers of the first, upper, and lower cable chain guides all coincide with the rotation center of the O-arm, forming an annular running space that restricts the cable chain assembly from moving within the same height plane.

[0009] The preferred technical solution is as follows: the cable chain assembly always maintains a U-shape within the cable chain guide rail; the fixed end of the cable chain assembly is fixedly connected to the outer ring of the O-ring through the mounting hole of the first cable chain guide rail; and the movable end of the cable chain assembly is fixedly connected to the inner ring of the O-ring through the space reserved between the upper and lower parts of the second cable chain guide rail via an inner ring fastener.

[0010] The preferred technical solution is as follows: the cable chain assembly includes a bidirectional bending cable chain, an elastic sheet, and a cable; the elastic sheet is arranged along the length of the cable chain between the cable and the inner wall of the cable chain, and the length of the elastic sheet is less than the overall length of the cable chain, so as to keep the cable chain taut.

[0011] The preferred technical solution is as follows: magnetic elements are evenly distributed on the inner side of the first drag chain guide rail, and magnetic elements are evenly distributed on the inner side of the second drag chain guide rail and the lower side of the second drag chain guide rail. The elastic sheet is magnetically conductive. The elastic sheet, the first magnetic element, and the second magnetic element work together to make the drag chain assembly fit tightly against the inner wall of the drag chain guide rail.

[0012] The preferred technical solution is as follows: the cable chain tensioning mechanism includes a ring gear, a guide wheel, a limiting roller, a transmission gear, a connecting plate, and a drive motor; the ring gear is fixed to the outer ring of the O-arm, and its center coincides with the rotation center of the O-arm; the inner ring of the ring gear is a V-shaped slide rail, and the outer ring of the ring gear is a gear tooth; the limiting roller is mounted on the connecting plate and cooperates with the inner ring V-shaped slide rail of the ring gear; the guide wheel is mounted on the connecting plate and its height is the same as the height of the cable chain; part of the outer wall of the guide wheel is fitted with the arc segment of the cable chain; the drive motor is fixed on the connecting plate and is used to drive the transmission gear to rotate, and the transmission gear meshes with the outer ring gear teeth of the ring gear.

[0013] A preferred technical solution is that a pressure ring is provided on the outer periphery of the guide wheel, and the pressure ring is used to monitor the pressure value between the guide wheel and the cable chain in real time.

[0014] A preferred technical solution is that it further includes a control system, which controls the movement speed of the guide wheel based on the pressure value monitored by the pressure ring to ensure that the pressure between the guide wheel and the cable chain is constant.

[0015] Due to the application of the above technical solution, the beneficial effects of this utility model are as follows:

[0016] The drag chain structure provided by this utility model for use in O-arm X-ray imaging equipment achieves stable energy and signal transmission when the inner ring of the O-arm rotates more than 360° by optimizing the drag chain arrangement and mechanical structure. It has the advantages of compact structure, low cost and convenient maintenance, and solves the problems of drag chain accumulation and large equipment size in traditional methods, thereby improving the reliability and stability of equipment operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cable chain structure involved in this utility model.

[0018] Figure 2 This is a partial schematic diagram of the cable chain guide rail involved in this utility model.

[0019] Figure 3 This is a partial schematic diagram of the cable chain assembly involved in this utility model.

[0020] Figure 4 This is a partial schematic diagram of the cable chain tensioning mechanism involved in this utility model. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0022] Please seeFigures 1-4 It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example:

[0025] like Figures 1 to 4 As shown, according to a general technical concept of this utility model, a cable chain structure for use in an O-arm X-ray imaging device is provided, including a cable chain assembly 1, a cable chain guide rail 2, and a cable chain tensioning mechanism 3; the cable chain assembly 1 is U-shaped, with both ends fixed to the outer ring 100 and the inner ring 200 of the O-arm, respectively; the cable chain guide rail 2 includes a cable chain guide rail 21 fixed to the outer ring 100 of the O-arm and a cable chain guide rail 22 fixed to the inner ring 200 of the O-arm, the cable chain guide rail 21 and the cable chain guide rail 22 together form an annular running space to limit the trajectory and posture of the cable chain assembly 1; the cable chain tensioning mechanism 3 is used to maintain the tension of the cable chain assembly 1.

[0026] like Figures 1 to 4As shown, in an exemplary embodiment of this utility model, the first cable chain guide 21 is annular with a flat U-shaped cross-section; the second cable chain guide 22 includes an upper cable chain guide 221 and a lower cable chain guide 222, both of which are annular with an L-shaped cross-section. The upper and lower cable chain guides are arranged vertically opposite each other, and their combined height is equal to that of the first cable chain guide 21. The centers of the first, upper, and lower cable chain guides coincide with the rotation center of the O-arm, forming an annular running space that restricts the cable chain assembly 1 to move within the same height plane. This structure ensures that the cable chain assembly 1 maintains the same height space throughout operation, and the two straight segments of the U-shaped bend maintain good contact with the cable chain guide 2, preventing accumulation or localized S-shaped bends.

[0027] like Figures 1 to 4 As shown, in an exemplary embodiment of this utility model, the cable chain assembly 1 always maintains a U-shape within the cable chain guide 2. The fixed end of the cable chain assembly 1 is fixedly connected to the outer ring 100 of the O-arm through the mounting hole of the cable chain guide 21. The movable end of the cable chain assembly 1 is fixedly connected to the inner ring 200 of the O-arm through the space reserved between the upper 221 and the lower 222 of the cable chain guide 2 via the inner ring fixing member 4.

[0028] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the cable chain assembly 1 includes a bidirectional bending cable chain 11, an elastic sheet 12, and a cable 13; the elastic sheet 12 is arranged along the length of the cable chain between the cable 13 and the inner wall of the cable chain 11, and the length of the elastic sheet 12 is less than the overall length of the cable chain 11, so as to keep the cable chain 11 taut and avoid the cable chain 11 from piling up or local S-shaped bending.

[0029] like Figures 1 to 4 As shown, in an exemplary embodiment of this utility model, magnetic elements are evenly distributed on the inner side of the first drag chain guide 21, with a central angle of 20° between them; magnetic elements are evenly distributed on the inner side of the upper drag chain guide 221 and the lower drag chain guide 222, with a central angle of 20° between them; the elastic sheet 12 is magnetically conductive; the elastic sheet 12, magnetic elements 1 and 2 work together to make the drag chain assembly 1 fit tightly against the inner wall of the drag chain guide 2.

[0030] like Figures 1 to 4As shown, in an exemplary embodiment of this utility model, the cable chain tensioning mechanism 3 includes a ring gear 31, a guide wheel 32, a limiting roller 33, a transmission gear 34, a connecting plate 35, and a drive motor 36. The ring gear 31 is fixed to the outer ring 100 of the O-arm, and its center coincides with the rotation center of the O-arm. The inner ring of the ring gear 31 is a V-shaped slide rail, and the outer ring of the ring gear 31 is a gear tooth. The limiting roller 33 is rotatably mounted on the connecting plate 35 and cooperates with the inner ring V-shaped slide rail of the ring gear 31. The guide wheel 32 is mounted on the connecting plate 35 and its height is consistent with the height of the cable chain. Part of the outer wall of the guide wheel 32 is fitted with the arc segment of the cable chain. The drive motor 36 is fixed on the connecting plate 35 and is used to drive the transmission gear 34 to rotate. The transmission gear 34 meshes with the outer ring teeth of the ring gear 31. When the cable chain assembly 1 moves with the inner ring 200 of the O-arm, the cable chain tensioning mechanism 3 moves synchronously to ensure that the cable chain assembly 1 is always in a U-shape, and at the same time, the arc segment of the U-shape is always in good condition, without accumulation or deformation.

[0031] like Figures 1 to 4 As shown, in an exemplary embodiment of this utility model, a pressure ring (not shown) is provided on the outer periphery of the guide wheel 32; a piezoelectric contact pressure sensor is provided on the peripheral wall of the pressure ring; the pressure sensor is located at the contact position between the pressure ring and the cable chain assembly 1); the pressure ring is used to monitor the pressure value between the guide wheel 32 and the cable chain in real time.

[0032] like Figures 1 to 4 As shown, in one exemplary embodiment of this utility model, a control system is also included. The control system controls the movement of the guide wheel 32 based on the pressure value monitored by the pressure ring to ensure that the pressure between the guide wheel 32 and the cable chain is constant.

[0033] The working principle is as follows: When the equipment is in the shooting preparation state, the cable chain assembly 1 is in the starting position, with the long side of the U-shape in contact with the cable chain guide rail 21; when the inner ring 200 rotates, the cable chain assembly 1 moves synchronously with the inner ring 200, and the lengths of the two sides of the U-shape change alternately. The cable chain tensioning mechanism 3 rotates synchronously through the meshing of the transmission gear 34 and the ring gear 31, and the guide wheel 32 keeps the cable chain tensioned; after the rotation ends, the cable chain assembly 1 is in the termination position; when the inner ring 200 rotates in the opposite direction, the cable chain assembly 1 returns to the starting position. Throughout the process, magnetic element one, magnetic element two, and elastic sheet 12 assist in controlling the cable chain posture to ensure stable operation.

[0034] Therefore, this utility model has the following advantages:

[0035] The drag chain structure provided by this utility model for use in O-arm X-ray imaging equipment achieves stable energy and signal transmission when the inner ring of the O-arm rotates more than 360° by optimizing the drag chain arrangement and mechanical structure. It has the advantages of compact structure, low cost and convenient maintenance, and solves the problems of drag chain accumulation and large equipment size in traditional methods, thereby improving the reliability and stability of equipment operation.

[0036] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A cable chain structure used in O-arm X-ray imaging equipment, characterized in that: The system includes a cable chain assembly, cable chain guides, and a cable chain tensioning mechanism. The cable chain assembly is U-shaped, with its two ends fixed to the outer and inner rings of an O-arm, respectively. The cable chain guides include a first cable chain guide fixed to the outer ring of the O-arm and a second cable chain guide fixed to the inner ring of the O-arm. The first and second cable chain guides together form an annular running space to limit the trajectory and posture of the cable chain assembly. The cable chain tensioning mechanism is used to maintain the tension of the cable chain assembly.

2. The cable chain structure applied in an O-arm X-ray imaging device according to claim 1, characterized in that: The first cable chain guide is annular with a flat U-shaped cross-section. The second cable chain guide includes an upper cable chain guide and a lower cable chain guide. Both the upper and lower cable chain guides are annular with an L-shaped cross-section. The upper and lower cable chain guides are arranged vertically opposite each other, and their combined height is equal to that of the first cable chain guide. The centers of the first, upper, and lower cable chain guides coincide with the rotation center of the O-arm, forming an annular running space that restricts the cable chain assembly from moving within the same height plane.

3. The cable chain structure applied in an O-arm X-ray imaging device according to claim 2, characterized in that: The cable chain assembly always maintains a U-shape within the cable chain guide rail. The fixed end of the cable chain assembly is fixedly connected to the outer ring of the O-ring through the mounting hole of the first cable chain guide rail. The movable end of the cable chain assembly is fixedly connected to the inner ring of the O-ring through the space reserved between the upper and lower parts of the second cable chain guide rail via an inner ring fastener.

4. The cable chain structure applied in an O-arm X-ray imaging device according to claim 3, characterized in that: The cable chain assembly includes a bidirectional bending cable chain, an elastic sheet, and a cable; the elastic sheet is arranged along the length of the cable chain between the cable and the inner wall of the cable chain, and the length of the elastic sheet is less than the overall length of the cable chain, in order to keep the cable chain taut.

5. The cable chain structure applied in an O-arm X-ray imaging device according to claim 4, characterized in that: Magnetic elements are evenly distributed on the inner side of the first drag chain guide rail, and magnetic elements are evenly distributed on the inner side of the second drag chain guide rail and below the second drag chain guide rail. The elastic sheet is magnetically conductive. The elastic sheet, the first magnetic element, and the second magnetic element work together to make the drag chain assembly fit tightly against the inner wall of the drag chain guide rail.

6. The cable chain structure applied in an O-arm X-ray imaging device according to claim 1, characterized in that: The cable chain tensioning mechanism includes a ring gear, a guide wheel, a limiting roller, a transmission gear, a connecting plate, and a drive motor. The ring gear is fixed to the outer ring of the O-arm, and its center coincides with the rotation center of the O-arm. The inner ring of the ring gear is a V-shaped slide rail, and the outer ring of the ring gear is a gear tooth. The limiting roller is mounted on the connecting plate and cooperates with the inner ring V-shaped slide rail of the ring gear. The guide wheel is mounted on the connecting plate and its height is the same as the height of the cable chain. Part of the outer wall of the guide wheel is fitted to the arc segment of the cable chain. The drive motor is fixed to the connecting plate and is used to drive the transmission gear to rotate. The transmission gear meshes with the outer ring teeth of the ring gear.

7. The cable chain structure applied in an O-arm X-ray imaging device according to claim 6, characterized in that: A pressure ring is provided on the outer periphery of the guide wheel, and the pressure ring is used to monitor the pressure value between the guide wheel and the cable chain in real time.

8. The cable chain structure applied in an O-arm X-ray imaging device according to claim 7, characterized in that: It also includes a control system that controls the movement speed of the guide wheel based on the pressure value monitored by the pressure ring to ensure that the pressure between the guide wheel and the cable chain is constant.

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