Nickel-titanium mandrel

Abstract

The utility model discloses a nickel titanium core shaft which comprises a core shaft body, the core shaft body comprises an outer core rod and an inner core shaft, a connecting seat is arranged at one end of the outer core rod, inserting grooves matched with the outer core rod in an inserting mode are formed in the outer core rod, a gradual change end and the inner middle of the connecting seat, and a locking groove is formed in the connecting seat. The core shaft body comprises an outer core rod and an inner core shaft, the inner core shaft is inserted into an inserting groove in the outer core rod, a locking pressing plate is arranged in the locking groove through a locking support, and one end of the locking support penetrates through the upper wall of the connecting base in a sliding mode and is in threaded connection with a screw outside the connecting base. When the inner core shaft is completely inserted into the outer core rod, the outer core rod with the large diameter can be used for medical operation, meanwhile, when the inner core shaft is pulled out of the outer core rod to be independently used, a small core shaft can be formed for medical operation such as puncture, the inner core shaft is partially inserted into the outer core rod, and a core shaft with the two ends different in diameter can be formed for use. And the use flexibility of the mandrel is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical mandrel technology, specifically a nickel-titanium mandrel. Background Technology

[0002] A mandrel is a shaft located at the center of a device or tool. Mandrels have many uses in the medical field. They are used to make guidewires, which can be used as an internal guiding tool. Depending on the purpose of the guidewire, it can be divided into a main section and a guide section. The main section needs to have good support and pushability, while the guide section needs to have good elasticity and flexural strength.

[0003] The existing medical guidewire with application number 202021372156.X is applicable to percutaneous nephrology. This guidewire includes an inner core segment, which comprises a main section and a guide section; the main section and the guide section are connected; the main section is made of steel, and the guide section is made of shape memory metal. The medical guidewire provided by this invention, by using steel for the main section, allows it to meet both support and pushing requirements. By using shape memory metal for the guide section, it provides good shape memory alloy properties and excellent anti-kinking performance. This allows the medical guidewire to meet both support and flexural strength requirements, making its application more flexible. However, it is not convenient to adjust the diameter of the guidewire mandrel, resulting in poor flexibility in its use. Utility Model Content

[0004] The purpose of this invention is to provide a nickel-titanium mandrel to solve the problem that the diameter of the guide wire mandrel is not easy to adjust in the prior art, resulting in poor flexibility in the use of the guide wire mandrel.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nickel-titanium mandrel, comprising a mandrel body, the mandrel body including an outer mandrel and an inner mandrel, one end of the outer mandrel being provided with a connecting seat, and one end of the connecting seat being provided with a tapered end, the outer mandrel, the tapered end and the middle of the connecting seat being provided with insertion grooves that cooperate with the outer mandrel, the connecting seat being provided with a locking groove, and a locking pressure plate being provided in the locking groove through a locking bracket, one end of the locking bracket slidingly penetrating through the upper wall of the connecting seat and threadedly connected to a screw outside the connecting seat.

[0006] Furthermore, the outer side of the inner mandrel is provided with reinforcing ribs, and multiple reinforcing ribs are arranged in a ring array.

[0007] Furthermore, the inner wall of the insertion groove of the outer core rod is provided with a limiting groove that slides and engages with the reinforcing rib, and the number of limiting grooves is the same as the number of reinforcing ribs.

[0008] Furthermore, one end of the screw is vertically rotated on the upper side of the connecting seat via a bearing, and the middle of one end of the locking bracket is provided with a threaded hole that engages with the screw thread.

[0009] Furthermore, the locking bracket is an inverted bracket, and the locking bracket is provided with a guide hole that slides through the inner wall of the connecting seat.

[0010] Furthermore, the lower side of the locking plate is provided with an arc-shaped pressure groove, and the inner wall of the arc-shaped pressure groove is provided with multiple anti-slip ribs.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention comprises an outer mandrel and an inner mandrel, with the inner mandrel inserted into a groove inside the outer mandrel. This allows for the use of the larger-diameter outer mandrel for medical procedures such as fluid drainage when the inner mandrel is fully inserted into or removed from the outer mandrel. Simultaneously, when the inner mandrel is removed from the outer mandrel and used alone, it forms a smaller mandrel for medical procedures such as puncture. Furthermore, the partial insertion of the inner mandrel into the outer mandrel allows for the use of mandrels with different diameters at both ends, thus improving the flexibility of mandrel use.

[0013] This invention features reinforcing ribs on the outer side of the inner mandrel, with multiple reinforcing ribs arranged in a circular array. The inner wall of the insertion groove of the outer mandrel has limiting grooves that slide and engage with the reinforcing ribs, and the number of limiting grooves is the same as the number of reinforcing ribs. This design improves the structural strength of the inner mandrel by providing reinforcing ribs on the outer side of the inner mandrel. At the same time, when the inner mandrel is partially inserted into the outer mandrel, it effectively prevents the inner mandrel from rotating radially relative to the outer mandrel, thus improving the stability of the inner mandrel during puncture.

[0014] This utility model features a locking groove inside the connecting seat, and a locking plate inside the locking groove via a locking bracket. One end of the locking bracket slides through the upper wall of the connecting seat and is threadedly connected to a screw outside the connecting seat. This allows the locking bracket and locking plate to be moved and adjusted by rotating the screw. When the locking plate is pressed against the outer wall of the inner mandrel, it can lock the inner mandrel inserted into the outer mandrel, which helps to improve the stability of the inner mandrel when inserted into the outer mandrel. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the connector structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the outer core rod structure of this utility model;

[0019] Figure 4 This is an enlarged schematic diagram of the structure at point A of this utility model.

[0020] In the diagram: 1. Outer core rod; 2. Inner core shaft; 3. Connecting seat; 4. Reinforcing rib; 5. Insertion groove; 6. Limiting groove; 7. Gradient end; 8. Locking groove; 9. Locking pressure plate; 10. Guide sliding hole; 11. Arc-shaped pressure groove; 12. Bearing; 13. Locking bracket; 14. Screw; 15. Threaded hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, a nickel-titanium mandrel includes a mandrel body, which includes an outer mandrel 1 and an inner mandrel 2. The outer mandrel 1 and the inner mandrel 2 may be made of nickel-titanium alloy. One end of the outer mandrel 1 is provided with a connecting seat 3, and one end of the connecting seat 3 is also provided with a tapered end 7. The outer mandrel 1, the tapered end 7, and the connecting seat 3 are all provided with insertion grooves 5 that cooperate with the insertion of the outer mandrel 1. This allows the outer mandrel 1 with a larger diameter to be used for medical operations such as fluid drainage when the inner mandrel 2 is fully inserted into or removed from the outer mandrel 1. At the same time, when the inner mandrel 2 is removed from the outer mandrel 1 and used alone, it can form a smaller mandrel for medical operations such as puncture. Moreover, when the inner mandrel 2 is partially inserted into the outer mandrel 1, it can form a mandrel with different diameters at both ends, which improves the flexibility of the mandrel.

[0023] like Figure 1 and Figure 2As shown, in order to lock the inner spindle 2 inserted into the outer core rod 1, a locking groove 8 is provided in the connecting seat 3, and a locking pressure plate 9 is provided in the locking groove 8 through the locking bracket 13. One end of the locking bracket 13 slides through the upper wall of the connecting seat 3 and is threadedly connected to the screw 14 outside the connecting seat 3. One end of the screw 14 is vertically rotated on the upper side of the connecting seat 3 through the bearing 12, and a threaded hole 15 is provided in the middle of one end of the locking bracket 13, which is threadedly engaged with the screw 14. The locking bracket 13 is a C-shaped bracket, and the locking bracket 13 is provided through the guide sliding hole 10 in the inner wall of the connecting seat 3, so that the locking bracket 13 and the locking pressure plate 9 can be moved and adjusted by rotating the screw 14. When the locking pressure plate 9 is pressed on the outer wall of the inner core rod 2, the inner core rod 2 inserted into the outer core rod 1 can be locked, which is beneficial to improving the stability of the inner core rod 2 inserted into the outer core rod 1.

[0024] like Figure 1 , Figure 3 and Figure 4 As shown, in order to improve the stability of the inner mandrel during puncture, the outer side of the inner mandrel 2 is provided with reinforcing ribs 4, and multiple reinforcing ribs 4 are arranged in a ring array. The inner wall of the insertion groove 5 of the outer mandrel 1 is provided with limiting grooves 6 that slide and engage with the reinforcing ribs 4, and the number of limiting grooves 6 is the same as that of the reinforcing ribs 4. This improves the structural strength of the inner mandrel 2 by providing reinforcing ribs 4 on the outer side of the inner mandrel 2. At the same time, when the inner mandrel 2 is partially inserted into the outer mandrel 1, it effectively prevents the inner mandrel 2 from rotating radially relative to the outer mandrel 1, which facilitates the improvement of the stability of the inner mandrel during puncture.

[0025] like Figure 2 As shown, in order to improve the stability of the inner mandrel 2 locked inside the outer mandrel 1, an arc-shaped pressure groove 11 is provided on the lower side of the locking pressure plate 9, and the inner wall of the arc-shaped pressure groove 11 is provided with multiple anti-slip ribs, which increases the contact area and anti-slip properties between the lower side of the locking pressure plate 9 and the outside of the inner mandrel 2, which is beneficial to improving the stability of the inner mandrel 2 locked inside the outer mandrel 1.

[0026] The working principle and usage process of this utility model are as follows: In use, the mandrel body includes an outer mandrel 1 and an inner mandrel 2, with the inner mandrel 2 inserted into the insertion groove 5 inside the outer mandrel 1. This allows the outer mandrel 1 with a larger diameter to be used for medical operations such as fluid drainage when the inner mandrel 2 is fully inserted into or removed from the outer mandrel 1. At the same time, when the inner mandrel 2 is removed from the outer mandrel 1 and used alone, it can form a smaller mandrel for medical operations such as puncture. Furthermore, when the inner mandrel 2 is partially inserted into the outer mandrel 1, it can form a mandrel with different diameters at both ends, thus improving the flexibility of mandrel use.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A nickel-titanium mandrel comprising a mandrel body, characterized by: The core shaft body includes an outer core rod (1) and an inner core shaft (2), one end of the outer core rod (1) is provided with a connecting seat (3), the outer core rod (1) and the connecting seat (3) are provided with plug-in grooves (5) matched with the outer core rod (1) in the middle, the connecting seat (3) is provided with a locking groove (8), and the locking groove (8) is provided with a locking pressing plate (9) through a locking support (13), one end of the locking support (13) is slidably penetrated through the upper wall of the connecting seat (3) and is threadedly connected with a screw rod (14) outside the connecting seat (3).

2. A nickel-titanium mandrel according to claim 1, wherein: The outer side of the inner core shaft (2) is provided with reinforcing ribs (4), and the reinforcing ribs (4) are arranged in a ring array.

3. A nickel-titanium mandrel according to claim 2, wherein: The inner wall of the plug-in groove (5) of the outer core rod (1) is provided with a limiting groove (6) matched with the reinforcing rib (4) in sliding plug-in, and the number of the limiting groove (6) is the same as that of the reinforcing rib (4).

4. The nickel-titanium mandrel of claim 1 wherein: One end of the screw rod (14) is vertically rotatably arranged on the upper side of the connecting seat (3) through a bearing (12), and one end of the locking support (13) is provided with a threaded hole (15) matched with the screw rod (14) in screwing.

5. A nickel-titanium mandrel according to claim 4, wherein: The locking support (13) is a type support, and the locking support (13) is slidably penetrated through the guide sliding hole (10) in the inner wall of the connecting seat (3).

6. A nickel-titanium mandrel according to claim 1, wherein: The lower side of the locking pressing plate (9) is provided with an arc-shaped pressing groove (11), and the inner wall of the arc-shaped pressing groove (11) is provided with a plurality of anti-skid ribs.

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