Connecting structure of intravascular stent

Abstract

The utility model discloses a connecting structure of an intravascular stent, and relates to the technical field of intravascular stents. The device comprises a plurality of first connecting rods which are symmetrically distributed, metal supports are fixedly connected to the ends, away from each other, of the first connecting rods on the two sides, a PLLA support is arranged between the metal supports on the two sides, and connecting mechanisms are arranged between the first connecting rods and the PLLA support, so that the effects that welding is not needed, the structure is simple, the process implementation difficulty is low, and the cost is low are achieved. And the connection is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vascular stent technical field especially a kind of connecting structure of vascular stent. BACKGROUND

[0002] In medicine, stent is the metal or plastic tube inserted into the lumen of anatomical blood vessel or catheter to keep the passage open, and stent implantation is to place stent, and stent implantation is often used to treat coronary heart disease, peripheral vascular disease and the like. When blood vessel appears narrow or blockage due to atherosclerosis and other reasons, stent is placed in lesion site by interventional operation, so as to achieve the purpose of treatment.

[0003] The vascular stent mentioned in the existing Chinese public patent (authorized announcement number: CN217645389U) can provide semi-rigid connection for ascending aortic stent and aortic valve stent by adopting first curved rod, so that the vascular stent can adapt to the relative movement of aortic valve ring and ascending aorta and anatomical structure, and improve the accuracy of in-vivo release of the vascular stent and the firmness of the vascular stent fixation.

[0004] When connecting metal stent and PLLA stent, the existing connection is mostly through welding point, but the welding point connection process is relatively complex, and multiple processes are needed, including preparation, welding operation, quality detection and the like, which may cause relatively long production cycle, thereby reducing work efficiency and being inconvenient for use of workers. UTILITY MODEL CONTENT

[0005] The utility model aims at: for solving the problem that welding point connection process is relatively complex, and production cycle is relatively long, thereby reducing work efficiency, the utility model provides a kind of connecting structure of vascular stent.

[0006] The utility model discloses a kind of connecting structure of vascular stent to achieve the above-mentioned purposes specifically using the following technical solutions:

[0007] A kind of connecting structure of vascular stent, including several connecting rods one being symmetrically distributed, the connecting rod one is fixedly connected with metal stent at the end of mutual faraway of both sides, PLLA stent is provided between the metal stent of both sides, connecting mechanism is provided between the connecting rod one and PLLA stent.

[0008] By using the above technical scheme, two metal stents are placed on both sides of PLLA stent, the connecting rod one is aligned with PLLA stent, then using connecting mechanism can make metal directly connect with PLLA stent, achieve the purpose of not needing welding point.

[0009] Further, the connecting mechanism comprises a fixing seat fixedly connected to one end of the connecting rod, a fixing hole is formed in the top of the fixing seat, two ends of the PLLA support are fixedly connected with connecting rods two in a ring array, one end of the connecting rod two close to the metal support is fixedly connected with a fixing block, the top of the fixing block is fixedly connected with a limiting block one, the bottom of the fixing block is in an open shape, and the fixing block is matched with the fixing hole.

[0010] By adopting the technical scheme, the PLLA support drives the connecting rod one and the connecting rod two to be connected, so that the metal support and the PLLA support are fixed, the connection between the metal and the PLLA support is completed, and the purpose of not needing welding is achieved.

[0011] Further, the outer side of the fixing block is fixedly connected with a plurality of connecting blocks in a ring array, one end of the connecting block away from the fixing block is fixedly connected with a reinforcing block, the top of the fixing seat is fixedly connected with reinforcing holes in a ring array, and the reinforcing block is matched with the reinforcing hole.

[0012] By adopting the technical scheme, the connecting area of the fixing block and the fixing hole is increased through the reinforcing block and the reinforcing hole.

[0013] Further, the reinforcing block is a regular polygon block, and the reinforcing hole is a regular polygon hole.

[0014] By adopting the technical scheme, the mutual restriction of edges ensures that the reinforcing block remains in a fixed position in the reinforcing hole.

[0015] Further, the bottom of the fixing block is provided with a base, the bottom end of the base is fixedly connected with a limiting block two, and the base and the fixing block are slidably arranged on the inner side.

[0016] By adopting the technical scheme, the fixing block is limited in the inside of the fixing hole through the limiting action of the limiting block one and the limiting block two.

[0017] Further, the outer side of the fixing block and the base is provided with a bushing, and the inner side of the bushing is slidably provided with a reinforcing rod.

[0018] By adopting the technical scheme, the base can be fixed by inserting the reinforcing rod into the inside of the bushing.

[0019] In summary, the utility model has at least one of the following beneficial effects.

[0020] 1. When the metal support and the PLLA support are connected, the PLLA support drives the connecting rod one and the connecting rod two to be connected first, so that the connection between the metal and the PLLA support is completed, the purpose of not needing welding, simple structure, low process implementation difficulty and stable connection is achieved.

[0021] 2、The utility model discloses, when fixed block connection is completed, through the staff with base is put into fixed block, through the limiting effect of limiting block no. 1 and limiting block no. 2 make fixed block be limited in the inside of fixed hole, reduce the risk of fixed block in the use process and separate fixed hole. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the first three-dimensional structure schematic diagram of metal support in the utility model;

[0023] Figure 2 It is the three-dimensional structure schematic diagram of connecting mechanism in the utility model;

[0024] Figure 3 It is the three-dimensional structure schematic diagram of fixed block in the utility model;

[0025] Figure 4 It is the fixed block cross section structure schematic diagram in the utility model.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, connecting rod one;2, metal support;3, PLLA support;4, fixed base;5, fixed hole;6, connecting rod two;7, fixed block;8, base;9, jack;10, reinforcing rod;11, connecting block;12, reinforcing block;13, reinforcing hole. DETAILED DESCRIPTION

[0028] The following combines with the Figures 1-4 The utility model is further explained in detail.

[0029] The utility model discloses a vascular stent's connecting structure.

[0030] Refer to Figure 1 And Figure 2 A vascular stent's connecting structure, including several connecting rod one 1 that are symmetric distribution, the both sides connecting rod one 1 fixed connection has metal support 2 to the end of mutual far away, be provided with PLLA support 3 between both sides metal support 2, be provided with connecting mechanism between connecting rod one 1 and PLLA support 3.

[0031] When connecting metal directly and PLLA support 3, first, two metal supports 2 are placed in PLLA support 3 both sides, and connecting rod one 1 is aligned PLLA support 3, then using connecting mechanism can make metal directly and PLLA support 3 between connection, reached the purpose without welding spot.

[0032] Refer to Figure 1 And Figure 2The connecting mechanism comprises a fixed seat 4 fixedly connected to one end of the connecting rod 1, a fixed hole 5 is formed in the top of the fixed seat 4, the two ends of the PLLA support 3 are fixedly connected with the connecting rod 2 in a ring array, the connecting rod 2 is fixedly connected with a fixed block 7 at one end close to the metal support 2, the top of the fixed block 7 is fixedly connected with a limiting block 1, and the bottom of the fixed block 7 is provided in an open shape.

[0033] The outer side of the fixed block 7 is fixedly connected with a plurality of connecting blocks 11 in a ring array, one end of the connecting block 11 away from the fixed block 7 is fixedly connected with a reinforcing block 12, the top of the fixed seat 4 is provided with reinforcing holes 13 in a ring array, and the reinforcing block 12 is matched with the reinforcing hole 13.

[0034] In addition, the reinforcing block 12 is provided as a regular polygon block, and the reinforcing hole 13 is provided as a regular polygon hole.

[0035] When the metal support 2 and the PLLA support 3 are connected, first, the PLLA support 3 is moved to drive the connecting rod 2 to move, the connecting rod 2 is moved to drive the fixed block 7 to move, the fixed block 7 is moved to enter the fixed hole 5, the fixed block 7 is matched with the fixed hole 5, the connecting rod 1 is connected with the connecting rod 2, the metal support 2 is fixedly connected with the PLLA support 3, the metal is directly connected with the PLLA support 3, the welding is not needed, the structure is simple, the process is easy to realize, and the connection is stable.

[0036] When the fixed block 7 is moved, the fixed block 7 is moved to drive the connecting block 11 to move, the connecting block 11 is moved to drive the reinforcing block 12 to enter the reinforcing hole 13, the reinforcing block 12 is matched with the reinforcing hole 13, the reinforcing block 12 is connected with the reinforcing hole 13, the connecting area of the fixed block 7 and the fixed hole 5 is increased through the reinforcing block 12 and the reinforcing hole 13, the stability of the connection is further improved, and the risk that the metal support 2 and the PLLA support 3 are separated due to external force or other factors in the use process is reduced.

[0037] When the reinforcing block 12 is connected with the reinforcing hole 13, the risk that the reinforcing block 12 rotates or deviates in the reinforcing hole 13 can be effectively reduced through the shape design of the regular polygon, the edges are restricted by each other, and the position of the reinforcing block 12 in the reinforcing hole 13 is ensured to be fixed.

[0038] Referring to Figure 1 , Figure 3 and Figure 4 , the bottom of the fixed block 7 is provided with a base 8, the bottom end of the base 8 is fixedly connected with a limiting block 2, and the inner side of the base 8 is slidably arranged with the fixed block 7.

[0039] Both the fixing block 7 and the base 8 have insertion holes 9 on their outer sides, and a reinforcing rod 10 is slidably installed on the inner side of the insertion hole 9.

[0040] After the fixing block 7 is connected, the staff will put the base 8 into the fixing block 7. The size of the base 8 is closely matched with the inner diameter of the fixing block 7. After the base 8 is inserted, there is a large friction between it and the inner side of the fixing block 7. The friction can reduce the risk of the base 8 falling off without external force, so that the base 8 is placed stably inside the fixing block 7. The fixing block 7 is limited inside the fixing hole 5 by the limiting action of the limiting block 1 and the limiting block 2, reducing the risk of the fixing block 7 falling off the fixing hole 5 during use.

[0041] After the base 8 is installed, the base 8 can be fixed by inserting the reinforcing rod 10 into the socket 9, so that the base 8 can be placed more stably inside the fixing block 7.

[0042] Working principle: Place two metal brackets 2 on both sides of the PLLA bracket 3, align the connecting rod 1 with the PLLA bracket 3, and then use the connecting mechanism to directly connect the metal to the PLLA bracket 3. Moving the PLLA bracket 3 moves the connecting rod 2 6, which in turn moves the fixing block 7. The fixing block 7 moves into the fixing hole 5, and the fixing block 7 matches the fixing hole 5, so that the connecting rod 1 1 and the connecting rod 2 6 are connected. The connection between the connecting rod 1 1 and the connecting rod 2 6 fixes the metal bracket 2 to the PLLA bracket 3, thus completing the direct connection between the metal and the PLLA bracket 3.

[0043] After the fixing block 7 is connected, the staff will put the base 8 into the fixing block 7. The size of the base 8 is closely matched with the inner diameter of the fixing block 7. After the base 8 is inserted, there is a large friction between it and the inner side of the fixing block 7. The friction can reduce the risk of the base 8 falling off without external force, so that the base 8 is placed stably inside the fixing block 7.

Claims

1. A connection structure for a vascular stent, comprising a plurality of connecting rods symmetrically distributed (1), characterized in that: Metal brackets (2) are fixedly connected to the ends of the connecting rods (1) on both sides that are far apart from each other. A PLLA bracket (3) is provided between the metal brackets (2) on both sides. A connecting mechanism is provided between the connecting rods (1) and the PLLA bracket (3).

2. The connection structure of a vascular stent according to claim 1, characterized in that: The connecting mechanism includes a fixed seat (4) fixedly connected to one end of the connecting rod (1). The fixed seat (4) has a fixed hole (5) on its top. The two ends of the PLLA bracket (3) are fixedly connected to the connecting rod (6) in a ring array. The end of the connecting rod (6) near the metal bracket (2) is fixedly connected to the fixing block (7). The top of the fixing block (7) is fixedly connected to the limiting block. The bottom of the fixing block (7) is set to be open. The fixing block (7) is adapted to the fixing hole (5).

3. The connection structure of a vascular stent according to claim 2, characterized in that: The outer side of the fixing block (7) is fixedly connected with a number of connecting blocks (11) in a ring array. The end of the connecting block (11) away from the fixing block (7) is fixedly connected with a reinforcing block (12). The top of the fixing seat (4) is provided with a reinforcing hole (13) in a ring array. The reinforcing block (12) is adapted to the reinforcing hole (13).

4. The connection structure of a vascular stent according to claim 3, characterized in that: The reinforcing block (12) is set as a regular polygonal block, and the reinforcing hole (13) is set as a regular polygonal hole.

5. The connection structure of a vascular stent according to claim 3, characterized in that: A base (8) is provided below the fixing block (7), and a limit block 2 is fixedly connected to the bottom end of the base (8). The base (8) is slidably disposed on the inner side of the fixing block (7).

6. The connection structure of a vascular stent according to claim 3, characterized in that: Both the fixing block (7) and the base (8) have insertion holes (9) on their outer sides, and a reinforcing rod (10) is slidably provided on the inner side of the insertion hole (9).

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