Centering jig, controller and intravascular ultrasonic imaging equipment

Abstract

The utility model relates to a centering jig, a controller and intravascular ultrasonic imaging equipment, a centering fixing ring is provided with a fixing channel with two through ends, a centering positioning shaft is provided with a positioning channel with two through ends, and the centering positioning shaft comprises a first positioning shaft section and a second positioning shaft section; the first positioning shaft section of the centering positioning shaft is used for being arranged in the fixing channel of the centering fixing ring in a penetrating mode, and the outer diameter of the first positioning shaft section is smaller than the inner diameter of the centering fixing ring. The centering fixing ring and the driving connecting cylinder can form coaxial centering assembly, the first positioning shaft section of the centering positioning shaft and the driving connecting shaft can also form coaxial centering assembly, the centering positioning shaft is arranged in an inner cavity of the driving connecting cylinder in a penetrating mode at the same time and inserted into an annular gap formed between the driving connecting shaft and the driving connecting cylinder, and in the radial direction, the first positioning shaft section of the centering positioning shaft and the driving connecting cylinder can form coaxial centering assembly. The centering fixing ring, the driving connecting cylinder, the centering positioning shaft and the driving connecting shaft are sequentially in coaxial centering fit, and the coaxial centering assembly effect between the centering jig and the guide pipe movement mechanism is further improved.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a centering fixture, a controller, and an intravascular ultrasonic imaging device. Background Art

[0002] Intravascular ultrasound imaging equipment (IVUS) is a device suitable for various interventional disciplines to scan and image blood vessels. Intravascular ultrasound imaging equipment plays an important auxiliary role in percutaneous coronary intervention surgery, including preoperative evaluation and postoperative optimization. Intravascular ultrasound imaging equipment usually includes a host, a controller and an imaging catheter. The controller is used to install and fix the imaging catheter and control the movement of the imaging catheter, including controlling the imaging catheter to implement rotational movement and retraction movement. The catheter mounting seat in the controller is mainly used for the installation and fixation of the imaging catheter. Whether the catheter mounting seat of the controller is coaxial with the catheter motion mechanism of the controller will directly determine whether the catheter motion mechanism is coaxial with the imaging catheter.

[0003] If the catheter motion mechanism is not coaxial with the imaging catheter, the axis of the imaging catheter will deviate from the motion axis of the catheter motion mechanism, causing image interference and affecting the quality of the ultrasound signal image. It will also increase the motion resistance, increase energy consumption, and cause more heat to be generated inside the controller, affecting the life of the device. When the controller controls the rotation of the imaging catheter, a large centrifugal circular swing will be generated, causing the imaging catheter to collide and rub against the wall of the blood vessel, increasing the wire jitter of the imaging catheter and affecting the scanning imaging of the blood vessel.

[0004] In summary, the coaxiality of the imaging catheter mounted on the controller will seriously affect the imaging function.

[0005] For the coaxial installation of the catheter mounting seat and the catheter motion mechanism, the conventional method is to use high-precision processing equipment to improve the processing accuracy of parts. In order to meet the coaxiality requirements, the difficulty of parts processing is increased, resulting in an increase in the defect rate, and the cost of parts processing increases exponentially. High-precision parts have certain requirements for the assembly environment and transportation protection, requiring a clean production workshop and more transportation protection packaging materials, which increases the cost of equipment assembly.

[0006] In addition, the centering jig can also be used for the coaxial alignment of the catheter mounting seat and the catheter motion mechanism. However, after using the centering jig to implement the coaxial alignment of the catheter mounting seat and the catheter motion mechanism, the centering jig is removed, and then the catheter motion mechanism is installed. Even if the centering jig is centered, the equipment difference between the centering jig and the catheter motion mechanism will cause the catheter motion mechanism and the catheter mounting seat to be misaligned. And this method will undoubtedly increase the assembly time. It is necessary to use the centering jig first, center the catheter mounting seat, remove the centering jig, and then assemble the catheter motion mechanism.

[0007] As can be seen from the above, among the conventional solutions, one solution has the technical problems of difficult parts processing and high equipment cost, and the other solution has the technical problems of increased assembly time and poor coaxial alignment between the catheter mounting seat and the catheter motion mechanism. Therefore, the conventional solutions cannot effectively solve the technical problem of poor coaxial alignment between the catheter mounting seat and the catheter motion mechanism. Summary of the invention

[0008] Based on this, it is necessary to provide a centering fixture, a controller and an intravascular ultrasound imaging device to address the technical problem of poor coaxial alignment between the catheter mounting seat and the catheter movement mechanism.

[0009] The present application provides a centering jig, which comprises:

[0010] A centering fixing ring, wherein the centering fixing ring has a fixing passage with two ends passing through;

[0011] A centering positioning shaft, wherein the centering positioning shaft has a positioning channel passing through both ends, the centering positioning shaft includes a first positioning shaft segment and a second positioning shaft segment which are interconnected in the axial direction, the first positioning shaft segment of the centering positioning shaft is used to pass through the fixing channel of the centering fixing ring, the outer diameter of the first positioning shaft segment is smaller than the inner diameter of the centering fixing ring, the centering fixing ring is used to be sleeved on the driving connection end of the catheter movement mechanism, and the second positioning shaft segment is used to connect the catheter mounting seat.

[0012] In one embodiment, the diameter of at least a portion of the first positioning shaft segment gradually decreases in a direction away from the second positioning shaft segment; and / or,

[0013] The diameter of at least a portion of the second positioning shaft segment gradually decreases in a direction gradually away from the first positioning shaft segment; and / or,

[0014] An opening groove which radially penetrates the side wall of the first positioning shaft segment is formed at the end of the first positioning shaft segment away from the second positioning shaft segment; and / or,

[0015] The side wall of the first positioning shaft section is provided with a positioning protrusion.

[0016] In one embodiment, the diameter of a portion of the first positioning shaft segment away from the second positioning shaft segment gradually decreases; and / or,

[0017] The diameter of a portion of the second positioning shaft segment away from the first positioning shaft segment gradually decreases; and / or,

[0018] The open groove is a linear groove opened along the axial direction of the first positioning shaft segment, and the number of the open grooves is at least two, which is used to separate the end of the first positioning shaft segment into at least two end unit petals; and / or,

[0019] The positioning protrusion is an annular protrusion surrounding the circumference of the first positioning shaft segment.

[0020] In one embodiment, a radially penetrating positioning hole is formed on the side wall of the centering fixing ring, a positioning element is passed through the positioning hole, and the positioning element is used to position the driving connection end of the abutting catheter movement mechanism; and / or,

[0021] A radially penetrating fixing hole is formed on the side wall of the centering fixing ring, and a fixing element is passed through the fixing hole. The fixing element is used to abut against the outer wall of the centering positioning shaft.

[0022] In one embodiment, there are multiple positioning holes, and the multiple positioning holes are distributed along the circumference of the centering fixing ring, and the positioning element is movably inserted into the positioning holes through a threaded structure; and / or,

[0023] There are multiple fixing holes, which are distributed along the circumference of the centering fixing ring, and the fixing elements are movably inserted into the fixing holes through threaded structures.

[0024] In one embodiment, the fixed channel includes a channel fixing section and a channel connecting section that are connected to each other, the radial cross-section of the channel fixing section is non-circular, and is used for driving assembly with the driving connecting end of the catheter movement mechanism; the positioning hole is connected to the channel fixing section, and the tightening hole is connected to the channel connecting section.

[0025] In one embodiment, a locking groove is provided at the end of the centering fixing ring, and a locking protrusion is provided on the centering positioning shaft, and the centering positioning shaft is positioned and engaged with the locking groove of the centering fixing ring through the locking protrusion; and / or,

[0026] The side wall of the centering fixing ring is provided with at least one circumferentially arranged annular reinforcing protrusion structure.

[0027] In one embodiment, the locking protrusion is an annular protrusion circumferentially surrounding the centering positioning shaft, and the locking groove is an annular groove circumferentially surrounding the centering fixing ring; and / or,

[0028] The locking protrusion is located on the second positioning shaft section.

[0029] The present application provides a controller, the controller comprising:

[0030] A catheter mounting seat, wherein the catheter mounting seat has a mounting shaft hole;

[0031] A catheter movement mechanism, the catheter movement mechanism having a drive connection end, the drive connection end comprising a drive connection cylinder and a drive connection shaft, the drive connection shaft is located in the inner cavity of the drive connection cylinder, and the outer diameter of the drive connection shaft is smaller than the inner diameter of the drive connection cylinder;

[0032] The centering fixture, the centering fixing ring is sleeved on the outside of the driving connecting tube, the first positioning shaft section of the centering positioning shaft is sleeved on the outside of the driving connecting shaft, and the second positioning shaft section of the centering positioning shaft is penetrated into the mounting shaft hole of the catheter mounting seat.

[0033] The present application provides an intravascular ultrasonic imaging device, which includes the centering jig or the controller.

[0034] In the above-mentioned centering fixture, controller and intravascular ultrasound imaging device, the centering fixing ring and the drive connecting tube can form a coaxial centering assembly, and the first positioning shaft section of the centering positioning shaft and the drive connecting shaft can also form a coaxial centering assembly. The centering positioning shaft is also simultaneously inserted into the inner cavity of the drive connecting tube and inserted into the annular gap formed between the drive connecting shaft and the drive connecting tube. In the radial direction from the outside to the inside, the centering fixing ring, the drive connecting tube, the centering positioning shaft and the drive connecting shaft form a coaxial centering fit in sequence, further improving the coaxial centering assembly effect between the centering fixture and the catheter movement mechanism. Therefore, the coaxial centering assembly effect is improved at least at the assembly level of the catheter movement mechanism, so that after the second positioning shaft section of the centering positioning shaft is inserted into the mounting shaft hole of the catheter mounting seat, the coaxial centering assembly effect of the catheter movement mechanism and the catheter mounting seat can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic diagram of the three-dimensional structure of a centering fixture provided in one embodiment of the present application.

[0036] FIG. 2 is a schematic diagram of the cross-sectional structure of a centering fixture provided in one embodiment of the present application.

[0037] FIG3 is a schematic diagram of a split explosion of a centering fixture, a catheter movement mechanism, and a catheter mounting seat provided in one embodiment of the present application.

[0038] FIG. 4 is a schematic diagram of the assembly structure of a centering fixture, a catheter movement mechanism, and a catheter mounting seat provided in one embodiment of the present application.

[0039] Figure Number:

[0040] 100. Centering fixture; 200. Catheter movement mechanism; 300. Catheter mounting seat;

[0041] 1000, centering fixing ring; 2000, centering positioning shaft;

[0042] 1000a, fixed channel; 1000a1, channel fixed section; 1000a2, channel connecting section;

[0043] 1100, positioning hole; 1100a, positioning element; 1200, fixing hole; 1200a, fixing element;

[0044] 1300, a positioning groove; 1400, a positioning protrusion; 1500, a ring-shaped reinforcing protrusion structure;

[0045] 2000a, positioning channel; 2100, first positioning shaft section; 2200, second positioning shaft section;

[0046] 2100a, opening groove; 2100b, positioning protrusion; 2100a1, end unit petal;

[0047] 210, drive connection end; 210a, drive connection cylinder; 210b, drive connection shaft;

[0048] 300a. Install the shaft hole. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0050] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0051] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0055] Referring to FIG. 1 and FIG. 2 , the present application provides a centering jig 100, which is used to coaxially connect the catheter movement mechanism 200 and the catheter mounting seat 300 of the controller in the intravascular ultrasound imaging device, and can realize the coaxial assembly between the catheter movement mechanism 200 and the catheter mounting seat 300, thereby ensuring the coaxial assembly of the imaging catheter in the intravascular ultrasound imaging device, and ensuring that the imaging catheter performs a good imaging function during use. In addition, those skilled in the art can also apply the centering jig 100 to other adapted coaxial assembly scenarios to solve the technical problem of coaxial centering assembly between two components, which is not limited here.

[0056] For the coaxial centering assembly of the catheter motion mechanism 200 and the catheter mounting seat 300 of the controller in the intravascular ultrasound imaging device, the centering fixture 100 can adaptively include a centering fixing ring 1000 and a centering positioning shaft 2000. Referring to FIG. 1 and FIG. 2, the centering fixing ring 1000 has a fixing channel 1000a with two ends through, and the centering positioning shaft 2000 also has a positioning channel 2000a with two ends through. The centering positioning shaft 2000 includes a first positioning shaft segment 2100 and a second positioning shaft segment 2200 that are interconnected in the axial direction, which is equivalent to dividing the centering positioning shaft 2000 into two sections in the axial direction, and they are respectively called the first positioning shaft segment 2100 and the second positioning shaft segment 2200.

[0057] The first positioning shaft segment 2100 and the second positioning shaft segment 2200 can be a split structure connected to each other to form the centering positioning shaft 2000, or can be an integrally formed structure. Moreover, according to the assembly requirements, the length, inner diameter, outer diameter and other dimensions of the first positioning shaft segment 2100 and the second positioning shaft segment 2200 can be the same or different. Among them, the first positioning shaft segment 2100 of the centering positioning shaft 2000 is used to be inserted into the fixed channel 1000a of the centering fixing ring 1000, and the insertion method can be interference fitting, threaded fitting or snap-fitting fitting, etc., which is not limited here, and the outer diameter of the first positioning shaft segment 2100 is smaller than the inner diameter of the centering fixing ring 1000. Referring to FIG. 2, it can be seen that after the first positioning shaft segment 2100 is inserted into the fixed channel 1000a of the centering fixing ring 1000, an annular gap is formed between the first positioning shaft segment 2100 and the centering fixing ring 1000, and the gap can be used to adapt the drive connection end 210 of the plug-in catheter movement mechanism 200.

[0058] Referring to FIG. 3 , for example, in one embodiment, the catheter mounting seat 300 has a mounting shaft hole 300a, and the catheter movement mechanism 200 has a drive connection end 210, and the drive connection end 210 includes a drive connection cylinder 210a and a drive connection shaft 210b, and the drive connection shaft 210b is located in the inner cavity of the drive connection cylinder 210a, and the outer diameter of the drive connection shaft 210b is smaller than the inner diameter of the drive connection cylinder 210a, and an annular gap is also formed between the drive connection shaft 210b and the drive connection cylinder 210a. At this time, the centering fixing ring 1000 can be sleeved on the outside of the drive connection cylinder 210a, and the first positioning shaft section 2100 of the centering positioning shaft 2000 is sleeved on the outside of the drive connection shaft 210b, thereby implementing coaxial assembly with the drive connection end 210 through the centering fixing ring 1000 and the centering positioning shaft 2000.

[0059] Referring to Figures 3 and 4, during this process, the centering fixing ring 1000 and the drive connecting cylinder 210a can form a coaxial centering assembly, and the first positioning shaft section 2100 of the centering positioning shaft 2000 and the drive connecting shaft 210b can also form a coaxial centering assembly, and referring to Figure 2, the centering positioning shaft 2000 is also simultaneously passed through the inner cavity of the drive connecting cylinder 210a, and inserted into the annular gap formed between the drive connecting shaft 210b and the drive connecting cylinder 210a. In the radial direction from the outside to the inside, the centering fixing ring 1000, the drive connecting cylinder 210a, the centering positioning shaft 2000 and the drive connecting shaft 210b form a coaxial centering fit in turn, further improving the coaxial centering assembly effect between the centering fixture 100 and the catheter movement mechanism 200. Therefore, the coaxial centering assembly effect is improved at least at the assembly level of the catheter movement mechanism 200, so that after the second positioning shaft segment 2200 of the centering positioning shaft 2000 is passed through the mounting shaft hole 300a of the catheter mounting seat 300, the coaxial centering assembly effect of the catheter movement mechanism 200 and the catheter mounting seat 300 can be effectively improved.

[0060] In order to meet the coaxial centering assembly of the catheter movement mechanism 200 and the catheter mounting seat 300, the diameter of at least a portion of the first positioning shaft segment 2100 can be gradually reduced in the direction away from the second positioning shaft segment 2200. For example, as shown in FIG. 2, the diameter of the portion of the first positioning shaft segment 2100 away from the second positioning shaft segment 2200 can be limited to gradually reduce. This structure of gradually reducing diameter can form a structure similar to a cone in the first positioning shaft segment 2100, which can not only facilitate the docking assembly between the first positioning shaft segment 2100 and the catheter movement mechanism 200, but also, as the first positioning shaft segment 2100 is inserted into the gap between the drive connecting cylinder 210a and the drive connecting shaft 210b, the gradually changing diameter can also form an interference fit (zero clearance fit) with the drive connecting cylinder 210a and the drive connecting shaft 210b, thereby improving the effect of coaxial centering assembly.

[0061] Similarly, the diameter of at least a portion of the second positioning shaft segment 2200 may be gradually reduced in a direction away from the first positioning shaft segment 2100. For example, the diameter of the portion of the second positioning shaft segment 2200 away from the first positioning shaft segment 2100 may be gradually reduced. This structure with gradually reduced diameter may form a structure similar to a cone in the second positioning shaft segment 2200. As the second positioning shaft segment 2200 is plugged into the mounting shaft hole 300a of the catheter mounting seat 300, the gradually changing diameter may also form an interference fit (zero clearance fit) with the mounting shaft hole 300a of the catheter mounting seat 300, thereby improving the effect of coaxial centering assembly.

[0062] An opening groove 2100a is provided at the end of the first positioning shaft segment 2100 away from the second positioning shaft segment 2200, which radially penetrates the side wall of the first positioning shaft segment 2100. The opening groove 2100a can be of various shapes, sizes and numbers. For example, the opening groove 2100a is a linear groove provided along the axial direction of the first positioning shaft segment 2100. The number of the opening grooves 2100a is at least two, which is used to separate the end of the first positioning shaft segment 2100 into at least two end unit petals 2100a1. The multiple end unit petals 2100a1 can make the end of the first positioning shaft segment 2100 form a radially variable structure, that is, as the end of the first positioning shaft segment 2100 is subjected to different forces, the multiple end unit petals 2100a1 can be close to or far away from each other. Therefore, it is convenient for the drive connection shaft 210b of the drive connection end 210 to penetrate into the interior of the first positioning shaft segment 2100. Among them, the first positioning shaft segment 2100 can be made of elastic material, so that the first positioning shaft segment 2100 has elastic function, so it can adaptively undergo elastic deformation when passing through the driving connecting shaft 210b, help pass through the driving connecting shaft 210b, and after passing through, it can improve the tightness of the mutual connection.

[0063] At the same time, the side wall of the first positioning shaft section 2100 is provided with a positioning protrusion 2100b. The positioning protrusion 2100b can adopt a variety of shapes, sizes and quantities, for example, the positioning protrusion 2100b is a ring-shaped protrusion around the circumference of the first positioning shaft section 2100. Through the cooperation of the opening groove 2100a and the positioning protrusion 2100b, firstly, the driving connecting shaft 210b of the driving connecting end 210 can be conveniently inserted into the interior of the first positioning shaft section 2100, and after the driving connecting cylinder 210a of the driving connecting end 210 is sleeved on the outside of the first positioning shaft section 2100, the end unit petal 2100a1 can also be squeezed by the positioning protrusion 2100b, so that the driving connecting cylinder 210a of the driving connecting end 210 and the driving connecting shaft 210b form an interference fit (zero clearance fit) with the first positioning shaft section 2100, thereby improving the effect of coaxial centering assembly.

[0064] In one embodiment, a radially penetrating positioning hole 1100 is formed on the side wall of the centering fixing ring 1000, and a positioning element 1100a is inserted into the positioning hole 1100. The positioning element 1100a is used to position the driving connection end 210 of the abutting catheter movement mechanism 200. There are multiple positioning holes 1100, and the multiple positioning holes 1100 are distributed along the circumference of the centering fixing ring 1000. The positioning element 1100a can be movably inserted into the positioning hole 1100 by various means such as a threaded structure and a clamping structure. For example, the number is set to three, and the three positioning holes 1100 are evenly distributed on the side wall of the centering fixing ring 1000 along the circumference of the centering fixing ring 1000, for example, they are distributed at intervals of 120 degrees, so that after the three positioning elements 1100a are passed through the three positioning holes 1100, a uniform centripetal axial force can be applied to the driving connection end 210 of the catheter movement mechanism 200 in the circumference of the centering fixing ring 1000, and the driving connection end 210 can be squeezed to a coaxially centered state.

[0065] The side wall of the centering fixing ring 1000 is provided with a radially penetrating fixing hole 1200, and a fixing element 1200a is inserted into the fixing hole 1200, and the fixing element 1200a is used to abut against the outer wall of the centering positioning shaft 2000. There are multiple fixing holes 1200, and the multiple fixing holes 1200 are distributed along the circumference of the centering fixing ring 1000. The fixing element 1200a is movably inserted into the fixing hole 1200 by various means such as a threaded structure and a clamping structure. For example, the number is set to three, and the three fixing holes 1200 are evenly distributed on the side wall of the centering fixing ring 1000 along the circumference of the centering fixing ring 1000, for example, they are distributed at intervals of 120 degrees, so that after the three fixing elements 1200a are passed through the three fixing holes 1200, a uniform centripetal axial force can be applied to the centering positioning shaft 2000 in the circumference of the centering fixing ring 1000, and the centering positioning shaft 2000 can be squeezed to a coaxially centered state.

[0066] As shown in FIG2 , the fixed channel 1000a includes a channel fixing section 1000a1 and a channel connecting section 1000a2 that are connected. As shown in FIG1 , the radial cross section of the channel fixing section 1000a1 is non-circular, and the non-circular radial cross section can be a regular shape such as a polygon, an ellipse, or other irregular shapes, so that the channel fixing section 1000a1 and the shape of the drive connecting end 210 of the catheter movement mechanism 200 form an adaptive plug-in connection, which is used to drive and assemble with the drive connecting end 210 of the catheter movement mechanism 200. When the drive connecting end 210 of the catheter movement mechanism 200 drives the centering fixture 100 to rotate, the rotational force can be transmitted based on this non-circular radial cross section. Continuing to refer to FIG2 , the positioning hole 1100 is connected to the channel fixing section 1000a1, and the fixing hole 1200 is connected to the channel connecting section 1000a2. After the positioning element 1100a is penetrated through the positioning hole 1100, the positioning element 1100a forms radial contact with the driving connection end 210 of the catheter movement mechanism 200. After the tightening element 1200a is penetrated through the fixing hole 1200, the tightening element 1200a forms radial contact with the centering positioning shaft 2000.

[0067] Continuing to refer to FIG. 2 , a locking groove 1300 is provided at the end of the centering fixing ring 1000, and a locking protrusion 1400 is provided on the centering positioning shaft 2000. The centering positioning shaft 2000 is positioned and engaged with the locking groove 1300 of the centering fixing ring 1000 through the locking protrusion 1400. Through the engagement between the locking protrusion 1400 and the locking groove 1300, the centering positioning shaft 2000 and the centering fixing ring 1000 can be limited to an axial fixed position when assembled, ensuring that the length of the centering positioning shaft 2000 passing through the centering fixing ring 1000 meets the preset requirements. For example, the locking protrusion 1400 can be located at the second positioning shaft segment 2200, and the length of the first positioning shaft segment 2100 passing through the centering fixing ring 1000 is limited by the limited assembly between the appropriate position on the second positioning shaft segment 2200 and the centering fixing ring 1000. In one embodiment, the positioning protrusion 1400 can be an annular protrusion circumferentially surrounding the centering and positioning shaft 2000, and the positioning groove 1300 can be an annular groove circumferentially surrounding the centering and fixing ring 1000. The side wall of the centering and fixing ring 1000 is also provided with at least one circumferentially arranged annular reinforcing protrusion structure 1500.

[0068] In one implementation, when the catheter mounting seat 300 and the catheter movement mechanism 200 are coaxially aligned and assembled with the aid of the centering fixture 100, the centering fixing ring 1000 of the centering fixture 100 can be installed into the drive connection end 210 of the catheter movement mechanism 200, so that the centering fixing ring 1000 is sleeved on the outside of the drive connection tube 210a, and at the same time, the first positioning shaft section 2100 of the centering positioning shaft 2000 is sleeved on the outside of the drive connection shaft 210b, thereby realizing the coaxial centering assembly between the centering fixture 100 and the catheter movement mechanism 200.

[0069] The diameter of the partial section of the first positioning shaft section 2100 away from the second positioning shaft section 2200 is gradually reduced. As the first positioning shaft section 2100 is inserted into the gap between the drive connecting cylinder 210a and the drive connecting shaft 210b, the gradually changing diameter can form an interference fit (zero clearance fit) with the drive connecting cylinder 210a and the drive connecting shaft 210b, thereby improving the effect of the coaxial centering assembly. Then, the second positioning shaft section 2200 of the centering positioning shaft 2000 is inserted into the mounting shaft hole 300a of the catheter mounting seat 300, and the diameter of the partial section of the second positioning shaft section 2200 away from the first positioning shaft section 2100 is gradually reduced. As the second positioning shaft section 2200 is inserted into the mounting shaft hole 300a of the catheter mounting seat 300, the gradually changing diameter can also form an interference fit (zero clearance fit) with the mounting shaft hole 300a of the catheter mounting seat 300, thereby improving the effect of the coaxial centering assembly.

[0070] The catheter mounting seat 300 and the centering fixture 100 are affected by gravity, which may cause the catheter mounting seat 300 and the catheter movement mechanism 200 to be out of coaxiality. However, through the cooperation of the opening groove 2100a and the positioning protrusion 2100b, an interference fit (zero clearance fit) can be formed between the driving connection cylinder 210a and the driving connection shaft 210b of the driving connection end 210 and the first positioning shaft section 2100, providing support force and improving the effect of coaxial centering assembly. At the same time, the assembly of the positioning element 1100a in the positioning hole 1100 can be used to apply a uniform centripetal axial force to the driving connection end 210, so that the driving connection end 210 is squeezed into a coaxial centering state.

[0071] The present application provides a controller, which includes a catheter mounting seat 300, a catheter movement mechanism 200 and a centering fixture 100. The catheter mounting seat 300 has a mounting shaft hole 300a, the catheter movement mechanism 200 has a drive connection end 210, the drive connection end 210 includes a drive connection cylinder 210a and a drive connection shaft 210b, the drive connection shaft 210b is located in the inner cavity of the drive connection cylinder 210a, the outer diameter of the drive connection shaft 210b is smaller than the inner diameter of the drive connection cylinder 210a, the centering fixing ring 1000 is sleeved on the outside of the drive connection cylinder 210a, the first positioning shaft section 2100 of the centering positioning shaft 2000 is sleeved on the outside of the drive connection shaft 210b, and the second positioning shaft section 2200 of the centering positioning shaft 2000 is penetrated in the mounting shaft hole 300a of the catheter mounting seat 300.

[0072] The present application provides an intravascular ultrasound imaging device, which includes a centering fixture 100, and the centering fixture 100 is used to connect the imaging catheter to the controller. Alternatively, the intravascular ultrasound imaging device includes a controller, and the catheter mounting seat 300 and the catheter movement mechanism 200 in the controller can be coaxially aligned and assembled through the centering fixture 100.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A centering jig, characterized in that: The centering jig comprises: A centering fixing ring, wherein the centering fixing ring has a fixing passage with two ends passing through; A centering positioning shaft, wherein the centering positioning shaft has a positioning channel passing through both ends, the centering positioning shaft includes a first positioning shaft segment and a second positioning shaft segment which are interconnected in the axial direction, the first positioning shaft segment of the centering positioning shaft is used to pass through the fixing channel of the centering fixing ring, the outer diameter of the first positioning shaft segment is smaller than the inner diameter of the centering fixing ring, the centering fixing ring is used to be sleeved on the driving connection end of the catheter movement mechanism, and the second positioning shaft segment is used to connect the catheter mounting seat.

2. The centering jig according to claim 1, characterized in that: The diameter of at least a portion of the first positioning shaft segment gradually decreases in a direction away from the second positioning shaft segment; and / or, The diameter of at least a portion of the second positioning shaft segment gradually decreases in a direction gradually away from the first positioning shaft segment; and / or, An opening groove which radially penetrates the side wall of the first positioning shaft segment is formed at the end of the first positioning shaft segment away from the second positioning shaft segment; and / or, The side wall of the first positioning shaft section is provided with a positioning protrusion.

3. The centering jig according to claim 2, characterized in that: The diameter of a portion of the first positioning shaft segment away from the second positioning shaft segment gradually decreases; and / or, The diameter of a portion of the second positioning shaft segment away from the first positioning shaft segment gradually decreases; and / or, The open groove is a linear groove opened along the axial direction of the first positioning shaft segment, and the number of the open grooves is at least two, which is used to separate the end of the first positioning shaft segment into at least two end unit petals; and / or, The positioning protrusion is an annular protrusion surrounding the circumference of the first positioning shaft segment.

4. The centering jig according to claim 1, characterized in that: A radially penetrating positioning hole is formed on the side wall of the centering fixing ring, a positioning element is passed through the positioning hole, and the positioning element is used to position the driving connection end of the abutting catheter movement mechanism; and / or, A radially penetrating fixing hole is formed on the side wall of the centering fixing ring, and a fixing element is passed through the fixing hole. The fixing element is used to abut against the outer wall of the centering positioning shaft.

5. The centering jig according to claim 4, characterized in that: There are multiple positioning holes, which are distributed along the circumference of the centering fixing ring, and the positioning element is movably inserted into the positioning holes through a threaded structure; and / or, There are multiple fixing holes, which are distributed along the circumference of the centering fixing ring, and the fixing elements are movably inserted into the fixing holes through threaded structures.

6. The centering jig according to claim 4, characterized in that: The fixed channel comprises a channel fixing section and a channel connecting section which are connected to each other. The radial cross section of the channel fixing section is non-circular and is used for driving assembly with the driving connecting end of the catheter movement mechanism. The positioning hole is connected to the channel fixing section, and the tightening hole is connected to the channel connecting section.

7. The centering jig according to claim 1, characterized in that: The end of the centering fixing ring is provided with a locking groove, and the centering positioning shaft is provided with a locking protrusion, and the centering positioning shaft is positioned and engaged with the locking groove of the centering fixing ring through the locking protrusion; and / or, The side wall of the centering fixing ring is provided with at least one circumferentially arranged annular reinforcing protrusion structure.

8. The centering jig according to claim 7, characterized in that: The locking protrusion is an annular protrusion circumferentially surrounding the centering and positioning shaft, and the locking groove is an annular groove circumferentially surrounding the centering fixing ring; and / or, The locking protrusion is located on the second positioning shaft section.

9. A controller, characterized in that: The controller comprises: A catheter mounting seat, wherein the catheter mounting seat has a mounting shaft hole; A catheter movement mechanism, the catheter movement mechanism having a drive connection end, the drive connection end comprising a drive connection cylinder and a drive connection shaft, the drive connection shaft is located in the inner cavity of the drive connection cylinder, and the outer diameter of the drive connection shaft is smaller than the inner diameter of the drive connection cylinder; According to the centering jig as described in any one of claims 1 to 8, the centering fixing ring is sleeved on the outside of the driving connecting tube, the first positioning shaft segment of the centering positioning shaft is sleeved on the outside of the driving connecting shaft, and the second positioning shaft segment of the centering positioning shaft is inserted into the mounting shaft hole of the catheter mounting seat.

10. An intravascular ultrasound imaging device, characterized in that: The intravascular ultrasound imaging device includes the centering jig according to any one of claims 1 to 8, or includes the controller according to claim 9.

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