Connecting assembly
By designing a combination of long-shaped support members and circumferential positioning members in the sheath joint, using the complementary clamping of threaded connections and the clamping parts, the problem of circumferential deflection during the loading of the bracket is solved, and the defective rate is reduced and Rework damage improves assembly efficiency and success rate.
Patent Information
- Application Number
- CN202323258261.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-11-29
AI Technical Summary
The existing sheath joints cause circumferential deflection of the stent during the loading of the stent, resulting in high defective yield rates, and rework is prone to damage to the sheath and stents, affecting the assembly success rate.
A connecting assembly is designed, including an elongated support member and a circumferential positioning member. Through the threaded connection of the elongated support member and the complementary clamping of the clamping part, the circumferential motion is defined, and combined with removable The clip is adjusted and fixed circumferentially positioned to avoid deflection of the bracket in the sheath.
It effectively prevents rework caused by poor stent loading, reduces the loading time of single-piece good products, and reduces the risk of damage to the sheath and stent due to rework, and improves the assembly success rate.
Smart Images
Figure CN222172862U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of interventional medicine, in particular to a connection component. Background Art
[0002] The sheath connector is used to assemble the proximal end of the sheath loaded with the stent into the delivery device handle, such as Figure 1-2 As shown, the existing sheath tube connector 50 is generally an injection-molded tube with a hook portion at the proximal end, and is integrally injection-molded. The proximal end of the sheath tube 60 is embedded in the distal end of the sheath tube connector 50, so that the sheath tube is assembled in the rear handle 91 of the conveyor handle 90 through the hook portion 51 of the sheath tube connector 50, so as to achieve the connection between the sheath tube 60 and the rear handle 91, so as to control the withdrawal of the sheath tube 60 by controlling the rear handle 91 of the conveyor handle to release the stent.
[0003] When the sheath tube 60 is assembled with the conveyor handle 90, the bracket in the sheath tube is fixed in the handle by the ear portion 51 of the sheath tube connector 50, and the circumferential position of the bracket in the sheath tube relative to the ear portion and the conveyor handle is fixed. However, when the bracket 80 is loaded into the sheath tube, since the sheath tube contains a spring, when the bracket is radially compressed by the conical part of the loader 70 and pulled into the sheath tube along the axial direction, the sheath tube will generate a spiral friction force on the bracket, so that the bracket rotates circumferentially in the sheath tube along the spiral direction of the spring, thereby causing the bracket loaded into the sheath to deflect relative to its initial position in the circumference (especially for the bracket that needs to be inverted because it has a barb 81 extending toward the proximal end of the sheath tube, since the bracket is pulled from the proximal end of the sheath tube to the distal end, that is, from one end of the sheath tube and the sheath tube connector to the end away from the sheath tube connector, the axial movement process of the bracket is long, and the deflection of the bracket is more uncontrollable, and more than 90% of them are judged as defective due to excessive deflection). Moreover, the final deflection between different stents or the same stent loaded multiple times is irregular, and the deflection of the stent loaded into the sheath cannot be improved by pre-biasing. The circumferential position of the stent loaded into the sheath is deflected relative to the circumferential position of the ear, which makes the circumferential position of the stent relative to the sheath connector when it is loaded into the sheath tube not in line with expectations. The stent may be judged as a defective product and reworked and reloaded into the sheath. However, rework of stent loading is likely to cause damage to the sheath tube and stent, and is more likely to cause assembly failure and product unqualified. Utility Model Content
[0004] A technical problem solved by the utility model is how to provide a connection component which can avoid rework due to the circumferential position deflection of the stent relative to the sheath tube joint (connection component) in the sheath tube caused by loading.
[0005] The utility model provides a connection assembly, the connection assembly comprises a long strip support member and a circumferential positioning member, the circumferential positioning member comprises a circumferential positioning portion, the circumferential positioning member is sleeved on the long strip support member, and the circumferential positioning member can adjust the circumferential position of the circumferential positioning portion along the circumferential direction relative to the long strip support member;
[0006] The elongated supporting member includes an axial limiting portion and a first clamping portion arranged along the circumferential direction, and the axial limiting portion and the first clamping portion are arranged at intervals in the axial direction; the circumferential positioning member includes a second clamping portion arranged along the circumferential direction, and the first clamping portion and the second clamping portion are complementary clamped to limit the circumferential movement of the circumferential positioning member relative to the elongated supporting member; the connecting assembly also includes a clamping member, which is detachably arranged between the circumferential positioning member and the axial limiting portion to limit the axial movement of the circumferential positioning member in a timely manner.
[0007] A technical effect of an embodiment of the utility model is that the connection assembly provided by the utility model can prevent rework caused by poor stent loading, greatly reduce the loading time of a single good product, and also reduce the damage to the sheath and the stent due to rework. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the sheath tube connector in the prior art being assembled in the conveyor handle (half of the rear handle housing is removed) and cooperating with the screw rod;
[0009] Figure 2 It is a schematic diagram of loading a stent into a sheath tube by using a loader in the prior art;
[0010] Figure 3 A structural schematic diagram of a connection assembly provided by the utility model;
[0011] Figure 4 A schematic diagram of the structure of a circumferential positioning member provided by the utility model;
[0012] Figure 5 A schematic diagram of the structure of a long strip support member provided by the utility model;
[0013] Figure 6 for Figure 3 A plan view of
[0014] Figure 7 A schematic diagram of the structure of another connection assembly provided by the utility model;
[0015] Figure 8 A schematic diagram of the structure of another circumferential positioning member provided by the utility model;
[0016] Fig. 9A schematic diagram of the structure of another long strip support member provided by the utility model;
[0017] Fig.10 A structural schematic diagram of another connection assembly provided by the utility model;
[0018] Fig.11 for Fig.10 Floor plan of
[0019] Fig.12 for Fig.11 Cross-sectional view along the BB direction;
[0020] Fig.13 A schematic structural diagram of another long strip support member provided by the utility model;
[0021] Fig.14 for Fig.13 The enlarged view of point A in the middle;
[0022] Fig.14a for Fig.13 An enlarged view of another embodiment at A in the middle;
[0023] Fig.14b for Fig.13 An enlarged view of another embodiment at A in the middle;
[0024] Fig.15 A schematic diagram of the structure of another long strip support member provided by the utility model;
[0025] Fig.16 A schematic diagram of the structure of another circumferential positioning member provided by the utility model;
[0026] Fig.17 A schematic diagram of the structure of a card provided by the utility model;
[0027] Fig.18 for Fig.17 Floor plan of
[0028] Fig.19 A diagram showing the relative positions of the circumferential positioning member and the long strip supporting member provided by the utility model when preparing for assembly;
[0029] Fig. 20 A relative position diagram of the circumferential positioning member and the long strip supporting member provided by the utility model after assembly;
[0030] Fig.21 A diagram showing the relative positions of the clamping member and the long strip supporting member provided by the utility model when preparing for assembly;
[0031] Fig. 22The diagram shows the relative positions of two developing points of a good quality stent observed from the front when the stent provided by the utility model is loaded into a sheath tube.
[0032] 100, connecting assembly; 10, long strip supporting member; 10a, first end; 10b, second end; 11, fixing portion; 111, first clamping portion; 1111, first groove; 1112, first tooth portion; 1112a, first surface; 112, fixed base;
[0033] 12. Axial limiting portion; 13. Fitting portion; 14. Clamping groove; 20. Circumferential positioning member; 21. Second clamping portion; 211. Second tooth portion; 212. Second groove; 22. Circumferential positioning portion; 23. Connecting and fixing seat; 30. Clamping member; 31. Clamping portion;
[0034] 60, sheath; 50, sheath joint; 70, loader; 80, bracket; 81, barb; 82, first developing point; 83, second developing point; 90, conveyor handle; 91, rear handle; 92, screw; DETAILED DESCRIPTION
[0035] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.
[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When 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. The terms "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
[0037] "Axial" generally refers to the length direction of the medical device when it is transported, and "radial" generally refers to the direction of the medical device that is perpendicular to its "axial" and passes through the center of the lumen. The "axial" and "radial" of any component of the medical device are defined based on this principle. In the field of interventional medical devices, the end of the delivery system that delivers the medical device when it is implanted in the human body or animal body is called the "proximal end", and the end farthest from the operator is called the "distal end". The "proximal end" and "distal end" of any component of the medical device or delivery system are defined based on this principle.
[0038] The utility model provides a connection assembly 100, such as Figure 3-21As shown, the connection assembly 100 includes an elongated support member 10 and a circumferential positioning member 20, the circumferential positioning member 20 includes a circumferential positioning portion 22, the circumferential positioning member 20 is sleeved on the elongated support member 10, and the circumferential positioning member 20 can adjust the circumferential position of the circumferential positioning portion 22 along the circumferential direction relative to the elongated support member 10.
[0039] The long strip support member 10 is a tube, and includes a first end 10a and a second end 10b, which are respectively arranged at two axial ends of the long strip support member 10. In this embodiment, the first end 10a is the distal end, which is used to connect the proximal end of the sheath tube, and the second end 10b is the proximal end. In one embodiment, as Figure 3-9 As shown, the circumferential positioning member 20 and the long strip support member 10 can be connected by internal and external threads, and an internal thread 10c can be provided inside the second end 10b of the long strip support member 10, such as Figure 5 As shown, an external thread 20a is provided at one end of the circumferential positioning member 20. Figure 4 As shown, the external thread 20a of the circumferential positioning member 20 is threadedly connected with the internal thread 10c of the long strip support member 10, as shown in FIG. Figure 3-6 In other embodiments, an external thread 10d may be provided on the outside of the second end portion 10b of the elongated support member 10, and correspondingly, an internal thread 20b is provided in the tube of the circumferential positioning member 20, such as Figure 7-9 As shown; alternatively, the internal and external threads may not be arranged at the ends, which is not limited here. It is only necessary that the two are threadedly connected, and after being adjusted to relative positions in the circumferential direction, various circumferential relative positions of the two can be achieved without the internal and external threads being separated; in other embodiments, after the circumferential positioning piece of the connecting assembly loaded with the bracket is adjusted to the relative position, the threaded connection can be fixed with medical glue to increase the reliability of the threaded connection and further fix the circumference.
[0040] The circumferential positioning member 20 further includes an axially extending tube body, which can be axially connected to the tube body of the elongated support member 10 or sleeved on the outside of the elongated support member 10. The tube body portion of the circumferential positioning member 20 is a connecting fixing seat 23, which is used to set a thread or fix the circumferential positioning portion 22. Figure 4 As shown. The circumferential positioning portion 22 includes two convex or concave portions symmetrically arranged on both sides of the axial direction of the circumferential positioning member 20, and the number of internal and external thread turns is greater than or equal to one turn. For the bracket 80 that needs to be distinguished between the left and right sides or the upper and lower sides, the circumferential positioning member 20 is rotated relative to the circumferential thread of the long strip support member 10, and the position of the bracket 80 relative to the circumferential positioning portion 22 can be adjusted within a half circle (180°) range. When the two circumferential positioning portions 22 are on both sides of the axial direction, the front or back of the bracket 80 faces upward, and the remaining half circle of thread is used to ensure the reliability of the threaded connection.
[0041] In other embodiments, Figure 10-21 As shown, the long strip support member 10 includes a clamping portion 11 and an axial limiting portion 12, wherein the clamping portion 11 includes a first clamping portion 111 arranged along the circumferential direction and a fixed base 112 arranged along the circumferential direction, the first clamping portion 111 extends from the fixed base 112 toward the first end 10a, and forms spaced tooth grooves in the circumferential direction to facilitate clamping with the second clamping portion 21, as shown in FIG. Fig.13 Combination Fig.16 As shown. The fixing portion 11 may also not be provided with a fixed base, and the first teeth 1112 of the first clamping portion 111 are directly arranged at intervals along the circumference of the long strip supporting member 10, such as Fig.15 The first clamping portion 111 can also be arranged at a non-end portion of the long strip support member 10, as long as its tooth groove is arranged circumferentially, so that the circumferential positioning member 20 can be sleeved along the long strip support member 10 to the first clamping portion 111 and engage with its tooth groove, and it is not limited to being arranged at one end of the long strip support member 10.
[0042] like Figure 10-14 As shown, the long strip support member 10 is tubular, and the long strip support member 10 includes a first end 10a and a second end 10b, and the first end 10a and the second end 10b are respectively arranged at the axial ends of the long strip support member 10, and the first clamping portion 111 opens toward the first end 10a. In this embodiment, the first clamping portion 111 includes at least two openings (i.e., first grooves 1111) toward the first end, so that the circumferential positioning member 20 can be relative to the first The clamping portion 111 is adjusted along the circumferential direction; the maximum outer diameter of the elongated supporting member portion between the first clamping portion 111 and the first end portion 10a is less than or equal to the inner diameter of the circumferential positioning member 20; the elongated supporting member 10 also includes a fitting portion 13 and a slot 14, the fitting portion 13 is axially arranged between the first clamping portion 111 and the slot 14, the slot 14 is arranged between the fitting portion 13 and the axial limiting portion 12, and the clamping member 30 can be used to be inserted into the slot 14 to limit the axial direction of the circumferential positioning member 20.
[0043] like Figure 13-16As shown, the first clamping portion 111 includes a first groove 1111 and a first tooth portion 1112 arranged at intervals along the circumferential direction, and the second clamping portion 21 includes a second tooth portion 211 and a second groove 212 arranged at intervals along the circumferential direction, the first groove 1111 is meshed with the second tooth portion 211, the first tooth portion 1112 is meshed with the second groove 212, and the first tooth portion 1112 is evenly arranged circumferentially to facilitate re-engagement between the two clamping portions after circumferential adjustment. Among them, the number of first tooth portions 1112 and the spacing of the first grooves 1111 are related to the circumference of the position of the first clamping portion 111. The number of first tooth portions 1112 uniformly arranged along the circumference determines the minimum circumferentially adjustable angle of the circumferential positioning portion 22 relative to the elongated support member 10. When the first tooth portion 1112 is too wide in the circumference, the number of teeth that can be set is small, and the minimum circumferentially adjustable angle is larger, and the adjustability when the bracket with excessive deflection caused by loading is adjusted to a good product is worse (poor adjustment accuracy); when the first tooth portion 1112 is too narrow in the circumference, it may result in a smaller tooth size and low circumferential fixation reliability. The number of teeth and the tooth spacing (slot spacing) can be set specifically according to the circumferential adjustment accuracy and the requirements for circumferential support of the teeth.
[0044] Since the circumferential position of the circumferential positioning member 20 relative to the elongated supporting member 10 is limited after the complementary engagement of the first engaging portion 111 and the second engaging portion 21, the smaller the gap between the two after complementary engagement, the better. If the first tooth portion 1112 and the first groove 1111 are set as complementary rectangular engagement, the tolerance requirement is more stringent, and the inevitable processing error during actual processing may bring about the problem of difficulty in tooth-groove engagement.
[0045] like Figure 13-14b As shown, the first tooth portion 1112 includes a first surface 1112a facing the first end portion 10a, and the first surface 1112a includes an inner side L1 and an outer side L2, and the length of the outer side is smaller than the length of the inner side. Fig.14 As shown, in this embodiment, the first surface 1112a is an isosceles trapezoid, and the two ends of the outer side are chamfered to reduce the contact area of the teeth of the two clamping parts, prevent excessive interference, and ensure the stability after clamping. Figure 14-14a As shown, Fig.14a Compared to Fig.14 The inner side L1 is the side close to the central axis of the long strip support member 10 , and the outer side L2 is the side away from the central axis of the long strip support member 10 .
[0046] In other embodiments, the length of the outer side of the first tooth portion 1112 may also be greater than the length of the inner side, and the spacing groove between the two first tooth portions 1112 forms a first groove 1111. Therefore, the length relationship between the inner side of the first groove 1111 and the outer side of the first groove 1111 is opposite to the length relationship between the inner and outer sides of the first tooth portion 1112; and because the first groove 1111 is meshed with the second tooth portion 211, the length relationship between the inner side of the first groove 1111 and the outer side of the first groove 1111 is the same as the length relationship between the inner and outer sides of the second tooth portion 211. Therefore, the second groove 212 and the first tooth portion 1112 can be set in corresponding concave and convex positions.
[0047] It is only necessary to set the inner side and the outer side of the first tooth portion 1112 to be of unequal length, so that when the first tooth portion 1112 cooperates with the second groove 212 or the second tooth portion 211 cooperates with the first groove 1111, on the basis of allowing dimensional errors in manufacturing, the fixation and stability after engagement can still be guaranteed, and at the same time, the problem of difficulty in tooth-groove engagement between the first tooth portion 1112 (second tooth portion 211) and the second groove 212 (first groove 1111) due to processing errors can be prevented.
[0048] In other embodiments, Fig.14b As shown, the first tooth portion 1112 includes a trapezoidal tooth, which includes a short base d1, a long base d2, a first side d3 and a second side d4. The short base d1 is closer to the first end 10a than the long base d2, and the long base d2 is closer to the second end 10b than the short base d1, wherein the long base d2 is a circumferential portion of the fixed base 112 close to the first end 10a, and the first side d3 and the second side d4 gradually move away from each other in a direction from the first end 10a toward the second end 10b.
[0049] like Figure 10-13 Combination Fig.16As shown, the axial limiting portion 12 and the first clamping portion 111 are spaced apart in the axial direction of the elongated support member 10, and the circumferential positioning member 20 includes a second clamping portion 21 and a connecting and fixing seat 23 arranged along the circumferential direction. The first clamping portion 111 and the second clamping portion 21 are complementary clamped to limit the circumferential position of the circumferential positioning member 20 relative to the elongated support member 10; in this embodiment, the connecting and fixing seat 23 is annular, and is used for axial sleeve connection along the elongated support member 10 so that the tooth grooves of the second clamping portion 21 are complementary clamped with the tooth grooves between the first clamping portion 111, and the circumferential positioning portion 22 is provided with two lug portions from the symmetrical sides of the connecting and fixing seat 23 toward the central axis away from the connecting and fixing seat 23, and the lug portions are T-shaped, and the bottom of the T-shape is connected to the connecting and fixing seat 23, so that the lug portions can partially pass through the long grooves on both sides of the screw 92 of the conveyor handle 90 and cooperate with the shell of the rear handle 91. In other embodiments, the circumferential positioning portion 22 may also be a groove portion that is easy to be embedded in, as long as it can be used for circumferential positioning in the shell of the rear handle, and no limitation is made here.
[0050] like Figure 17-18 As shown, the connection assembly 100 further includes a clamping member 30 , which is detachably disposed between the circumferential positioning member 20 and the axial limiting portion 12 to appropriately limit the axial position of the circumferential positioning member 20 .
[0051] The clamping member can also be configured as an insertion rod, and a socket is provided at the clamping groove 14 for the insertion of the insertion rod, and after the insertion of the insertion rod, it abuts against the circumferential positioning member 20 to limit the axial position of the circumferential positioning member 20, and the axial limiting portion 12 is the socket. When the axial length of the circumferential positioning member is smaller than the axial length of the fitting member, the socket is provided at the position of the fitting member, and it is only necessary to ensure that the insertion rod abuts against the circumferential positioning member after being inserted into the socket, thereby limiting the axial position of the circumferential positioning member.
[0052] In one embodiment, if Figure 17-18 As shown, the clamp 30 is an annular member, which includes a snap-in portion 31. The inner diameter of the clamp 30 is smaller than the outer diameter of the axial limiting portion 12, so that when the clamp 30 is snapped into the slot 14, the axial limiting portion 12 limits the axial position of the clamp 30 in the axial direction; the outer diameter of the clamp 30 is larger than the inner diameter of the circumferential positioning member 20, preventing the circumferential positioning member 20 from escaping from the outside of the clamp 30.
[0053] like Figure 17-18As shown, the snap-in portion 31 is a notch of the annular member, and the ratio of the straight-line distance D of the notch of the annular member to the interference amount of the outer diameter of the slot 14 is in the range of 15% to 30%; wherein, the interference amount is defined as: the percentage of the difference between the outer diameter of the slot 14 and the straight-line distance corresponding to the notch of the annular member to the outer diameter of the slot 14. In this embodiment, the outer diameter of the slot 14 is approximately equal to the inner diameter of the snap-in member 30, and the straight-line distance D corresponding to the notch of the annular member is the minimum straight-line distance between the two ends of the snap-in portion 31 parallel to the radial direction M of the annular member; the interference amount is the value obtained by dividing the difference between the outer diameter of the slot 14 and D by the outer diameter of the slot 14. When the interference amount is too small, the card 30 may be inserted into the card slot 14 with a small force, which may cause the card 30 to disengage, making it impossible to reliably fix the circumferential positioning member 20 and the elongated supporting member 10; when the interference amount is too large, the card 30 is not easy to be inserted into or disengaged from the card slot 14, which may result in a card insertion failure, or a disengagement failure and an inability to adjust the circumferential position of the bracket 80 relative to the circumferential positioning portion 22. The interference amount is set within the range of 15% to 30%, and the card 30 is easy to be inserted into or disengaged from the card slot 14, while the reliability of the circumferential fixation after insertion can be guaranteed.
[0054] by Figure 10-18 Taking the connection assembly 100 shown as an example, Figure 19-21 As shown, the second clamping portion 21 of the circumferential positioning member 20 is placed toward the second end portion 10b, as shown in FIG. Fig.19 As shown, the first end portion 10a of the long strip support member 10 is inserted into the first end portion 10a (in other embodiments, when the tooth groove of the first clamping portion is opened toward the second end portion 10b, it can also be inserted from the second end portion 10b, which is not limited here), and is translated axially toward the second end portion 10b to the tooth groove of the first clamping portion 111, as shown in FIG. Figure 19-20 As shown, the first clamping portion 111 is engaged with the tooth groove of the second clamping portion 21 to limit the circumferential position of the circumferential positioning member 20 relative to the long strip support member 10, and then the clamping member 30 is clamped into the clamping groove 14 to limit the axial position of the circumferential positioning member 20, as shown in FIG. Fig.21 Combination Fig.11 Then, the loader 70 can be used to fix the circumferential positioning portion 22, referring to Figure 2 At this time, the two circumferential positioning parts 22 (for Figure 2 The plane where the two hanging ears 51 are located is parallel to the horizontal plane, and the bracket 80 is loaded from the proximal end of the sheath tube 60 to the distal end of the sheath tube 60 with the front side facing upward (the front side of the bracket in the figure is the side with three developing points coaxially arranged as the front side) to complete the loading. When the loading is completed, if the bracket 80 is deflected relative to the circumferential direction of the sheath tube 60, when the front side of the bracket 80 is facing upward, the plane where the two circumferential positioning parts 22 are located (such as Fig.11The paper surface shown) will not be parallel to the horizontal plane (in the prior art, if the front side of the bracket 80 faces upward and the deflection between the plane where the two circumferential positioning parts 22 are located and the horizontal plane exceeds 30°, it will be judged as a defective product).
[0055] In this case, after the stent is loaded, the connecting assembly 100 provided by the present invention can firstly rotate the sheath tube 60 and the connecting assembly fixed together circumferentially, turn the deflected stent 80 to face upward (determined by the developing point of the stent 80 under X-ray), push the snap-in portion 31 of the clamp 30 to disengage the clamp 30 from the slot 14, and then slightly translate the circumferential positioning member 20 toward the direction of the first end portion 10a until the first clamping portion 111 and the second clamping portion 21 are disengaged, and at the same time, move the circumferential positioning portion 22 along the adhesive After the mating surface is rotated circumferentially until the plane where the two circumferential positioning parts 22 are located is parallel to the horizontal plane, the circumferential positioning member 20 is translated toward the second end 10b to re-engage the first clamping part 111 and the second clamping part 21, and the clamping member 30 is snapped into the clamping groove 14. The circumferential positioning member 20 is re-fixed to complete the adjustment of the bracket 80 so that the plane where the two circumferential positioning parts 22 are located is parallel to the horizontal plane when the front side of the bracket 80 is facing upward, so that when the connecting assembly 100 is installed in the conveyor handle 90, the front side of the bracket 80 is consistent with the front side of the conveyor handle 90.
[0056] As for the implementation method of the internal and external thread connection, when adjusting the deflection angle, the circumferential positioning piece is directly twisted until the plane where the circumferential positioning part is located is parallel to the horizontal plane. After determining the position of the circumferential positioning part, medical glue is used to fix the thread to keep the two axially and circumferentially fixed.
[0057] At least one axially asymmetric developing point is arranged along the axial direction on one side of the bracket 80 to mark the side as the front side. When the front side of the bracket 80 faces upward, the left and right sides of the bracket 80 further include a first developing point 82 and a second developing point 83 of different shapes. In this embodiment, the first developing point 82 on the left side is in the shape of "8" and the second developing point 83 on the right side is in the shape of "0". Fig. 22 As shown; when loading is completed, the developing points on the front side of the indicating bracket 80 are adjusted so that the front side of the bracket 80 faces upward, the first developing point 82 is still on the left side of the sheath core 93, the second developing point 83 is still on the right side of the sheath core 93, and the two developing points are not close to the sheath core 93 (indicating that the self-twist of the bracket 80 in the sheath tube 60 is small). Even if the plane where the two circumferential positioning parts 22 are located is deflected by more than 30° from the horizontal plane at this time, the positions of the two circumferential positioning parts 22 can still be adjusted by circumferentially rotating the connecting assembly 100 provided by the utility model, so that the plane where the two circumferential positioning parts 22 are located is parallel to the horizontal plane or deflected by no more than 30° to turn it into a usable good product, and this method does not move the bracket.
[0058] In one embodiment, the circumferential positioning member 20 further includes a first mark 24, and the first mark 24 is disposed at a circumferential middle position of the two circumferential positioning portions 22, such as Fig.10 Combination Fig.19 As shown, when the plane where the two circumferential positioning portions 22 are located is parallel to the horizontal plane, the first mark 24 faces directly upward or directly downward.
[0059] The connecting assembly provided by the utility model can solve the problem in the prior art that the stent loaded into the sheath is a defective product because the spring in the sheath tube causes the stent to deflect circumferentially along the circumferential positioning portion relative to the sheath tube joint during the loading process of the stent, especially for the inverted stent, which has a long loading distance along the sheath tube and finally has irregular deflection that cannot be solved by pre-biasing. It can prevent rework caused by poor loading of the stent, greatly reduce the loading time of a single good product, and also reduce the damage to the sheath tube and the stent due to rework.
[0060] 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.
[0061] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A connection assembly, characterized in that: The connecting assembly includes a long strip supporting member and a circumferential positioning member, wherein the circumferential positioning member includes a circumferential positioning portion, the circumferential positioning member is sleeved on the long strip supporting member, and the circumferential positioning member can adjust the circumferential position of the circumferential positioning portion along the circumferential direction relative to the long strip supporting member; The elongated supporting member includes an axial limiting portion and a first clamping portion arranged along the circumferential direction, and the axial limiting portion and the first clamping portion are arranged at intervals in the axial direction; the circumferential positioning member includes a second clamping portion arranged along the circumferential direction, and the first clamping portion and the second clamping portion are complementary clamped to limit the circumferential movement of the circumferential positioning member relative to the elongated supporting member; the connecting assembly also includes a clamping member, which is detachably arranged between the circumferential positioning member and the axial limiting portion to limit the axial movement of the circumferential positioning member in a timely manner.
2. The connection assembly according to claim 1, characterized in that: The long strip support member includes a first end portion provided at one axial end thereof, the first clamping portion includes at least two openings facing the first end portion, and the maximum outer diameter of the portion of the long strip support member between the first clamping portion and the first end portion is less than or equal to the inner diameter of the circumferential positioning member; The elongated supporting member further comprises a fitting portion and a slot, wherein the fitting portion is axially arranged between the first clamping portion and the slot, and the slot is arranged between the fitting portion and the axial limiting portion, and the clamping member can be used to be clamped into the slot.
3. The connection assembly according to claim 2, characterized in that: The clamping member is an annular member, and the annular member includes a clamping portion. The inner diameter of the clamping member is smaller than the outer diameter of the axial limiting portion, and the outer diameter of the clamping member is larger than the inner diameter of the circumferential positioning member.
4. The connection assembly according to claim 3, characterized in that: The snap-in portion is a notch of the annular member, and the ratio of the linear distance of the notch to the interference amount of the outer diameter of the snap-in slot is in the range of 15% to 30%.
5. The connection assembly according to claim 1, characterized in that: The first clamping portion includes a first groove and a first tooth portion arranged at intervals along the circumferential direction, and the second clamping portion includes a second tooth portion and a second groove arranged at intervals along the circumferential direction, the first groove meshes with the second tooth portion, and the first tooth portion meshes with the second groove.
6. The connection assembly according to claim 5, characterized in that: The elongated support member includes a first end and a second end, the first end and the second end are respectively arranged at the axial ends of the elongated support member, the first tooth portion includes a first surface facing the first end, the first surface includes an inner side edge and an outer side edge, and the length of the outer side edge is smaller than the length of the inner side edge.
7. The connection assembly according to claim 5, characterized in that: The elongated supporting member includes a first end and a second end, the first end and the second end are respectively arranged at two axial ends of the elongated supporting member, the first tooth portion includes a trapezoidal tooth, the trapezoidal tooth includes a short base, a long base, a first side and a second side, the short base is closer to the first end than the long base, the long base is closer to the second end than the short base, and the first side and the second side gradually move away from each other in a direction from the first end toward the second end.
8. The connection assembly according to claim 2, characterized in that: The clamping member is configured as an insertion rod, and a plug hole is configured at the clamping slot as the axial limiting portion for the insertion of the insertion rod, and the insertion rod abuts against the circumferential positioning member after being inserted.