Novel calculus removing mesh basket assembly

Abstract

The utility model relates to the field of medical instruments, in particular to a novel calculus removing mesh basket assembly which comprises mesh basket claws, cavity tubes, at least three mesh basket wires, a heat shrink tube and an outer sheath tube, and the number of the cavity tubes is the same as that of the mesh basket wires; the cavity tube is sleeved at the fixed end of the mesh basket wire, one end of the mesh basket wire is fixed on the outer side wall of the cavity tube, and the cavity tube and the mesh basket wire are locked and fixed in the heat shrink tube; according to the utility model, each group of mesh basket wires are separated, and the mesh basket wires are not in direct contact with the fixed ends of the other group of mesh basket wires when being stretched, so that the fixed ends are prevented from being loosened due to friction between the mesh basket wires; according to the technical scheme, assembling is simple, only one heat shrink tube is needed during heat shrink fixing, and due to the fact that other high-precision heat shrink tubes do not need to be additionally used, production cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a novel stone removal net basket component. Background Art

[0002] Urinary tract stones are one of the common diseases in urology. According to worldwide surveys and studies, the incidence rate is about 2% to 20%, and the incidence rate of urinary tract stones increases with age. Currently, percutaneous nephrolithotomy, ureteroscopy retrograde lithotripsy, and extracorporeal shock wave lithotripsy are relatively mature and have become the main methods for treating urinary tract stones.

[0003] The current existing technical solution for the three-wire basket head assembly structure is mainly to pass three nickel-titanium drive wires through the head end tube and then place them on the outer wall of the adjacent head end tube, and then use a high-precision heat shrink tube to shrink the head end tube and the fixed end of the nickel-titanium wire. Due to the small size and precision of the components, the assembly efficiency is low and the manufacturing cost is too high. In addition, the fixed end of the basket wire and the head end tube are fixed by heat shrinking with a precision heat shrink tube. When the basket head is telescoped and opened, the fixed end of the basket wire will twist back and forth and cause repeated tearing stress to the precision heat shrink tube. The wall thickness of the precision heat shrink tube is less than 0.01mm, which can easily cause the heat shrink tube to relax and fail, resulting in the fixed end of the basket wire falling off, making the device scrapped.

[0004] In addition, CN 219230031 U mentions another solution, in which three nickel-titanium drive wires are passed through the head end tube and then passed back into the adjacent head end tube. The three nickel-titanium wires after passing through the adjacent head end tube are fixed on the inner wall of the outer sleeve, and the nickel-titanium wire at the other end is fixed in the limiting tube; this technical solution requires pushing the limiting tube in front of the outer sleeve forward to push out the basket wire. If a bend is encountered, the pushing of the limiting tube is likely to encounter resistance, and the basket wire is likely to fail to extend. Utility Model Content

[0005] The purpose of the utility model is to provide a novel stone-removing basket assembly to solve the problems proposed in the above-mentioned background technology that the individual components of the basket head are precisely assembled, the assembly efficiency is low, and the fixed end of the basket wire and the head end tube are fixed by heat shrinking with a precision heat shrink tube. When the basket head is extended and opened and closed, the fixed end of the basket wire will twist back and forth and cause repeated tearing stress to the precision heat shrink tube, and the wall thickness of the precision heat shrink tube is less than 0.01mm, which can easily cause the heat shrink tube to relax and fail, resulting in the fixed end of the basket wire falling off, making the device scrapped.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel stone removal basket assembly comprises a basket claw, a cavity tube, a basket wire, a heat shrink tube 4 and an outer sheath tube 5, wherein the basket wire comprises at least three wires, and the cavity tube has the same number as the basket wires. The basket claw comprises a first head end tube 101, a second head end tube 102 and a third head end tube 103, the cavity tube comprises a first cavity tube 201, a second cavity tube 202 and a third cavity tube 203, and the basket wire comprises a first basket wire 301, a second basket wire 302 and a third basket wire 303.

[0008] The first driving wire 301a at one end of the first basket wire 301 is inserted into the first head end tube 101, the first cavity tube 201 is sleeved in the first driving wire 301a and is in contact with the first head end tube 101, and the first fixing wire 301b at the other end of the first basket wire 301 is inserted into the second head end tube 102 and attached to the outer wall of the second cavity tube 202; the second driving wire 302a at one end of the second basket wire 302 is inserted into the second head end tube 102, the second cavity tube 201 is sleeved in the second driving wire 302a and is in contact with the second cavity tube 202. The head end tube 102 is just in contact, and the second fixed wire 302b at the other end of the second basket wire 302 passes through the third head end tube 103 and sticks to the outer wall of the third cavity tube 203; the third driving wire 303a at one end of the third basket wire 303 passes through the third head end tube 103, the third cavity tube 203 is sleeved in the third driving wire 303a and just in contact with the third head end tube 103, and the third fixed wire 303b at the other end of the third basket wire 303 passes through the first head end tube 101 and sticks to the outer wall of the first cavity tube 201.

[0009] One end of the basket claw and the cavity tube are wrapped and tightened by the heat shrink tube 4. The heat shrink tube 4, the basket claw and one end of the outer sheath tube 5 are fixed by gluing.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model provides a cavity tube on the fixed end of the basket wire, which can separate the driving wires of each group of basket wires, and the fixed end of the basket wire is attached to the outer wall of the cavity tube, and the cavity tube and the fixed wire end of the basket wire are locked and fixed in the heat shrink tube, wherein the heat shrink tube, the basket claw and the fixed wire head end of the basket wire are fixed to the head end of the outer sheath tube by gluing, so as to realize the driving opening and closing structure of the basket head, and can avoid the situation that the fixed end of the basket wire falls off due to the failure of the single fixed heat shrink tube, and the product is scrapped; the technical scheme is simple to assemble, and only one large heat shrink tube is needed for heat shrink fixation, and since the assembly of three high-precision heat shrink tubes is eliminated, the production efficiency can be improved and the production cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the net basket head of the utility model;

[0013] Figure 2 It is a bottom view schematic diagram of the basket head structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the cavity tube installation structure of the utility model;

[0015] Figure 4 This is a schematic diagram of the heat shrink tube installation structure of the utility model;

[0016] Figure 5 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 6 This is a schematic diagram of the basket of the utility model being opened;

[0018] Among them: 101, head end tube; 102, head end tube; 103, head end tube; 201, cavity tube; 202, cavity tube; 203, cavity tube; 301, basket wire; 301a, drive wire; 301b, fixed wire; 302, basket wire; 302a, drive wire; 302b, fixed wire; 303, basket wire; 303a, drive wire; 303b, fixed wire; 4, heat shrink tube; 5, outer sheath. DETAILED DESCRIPTION

[0019] In order to clarify the technical problems, technical solutions, implementation processes and performance demonstrations, the utility model is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are for explanation only. The utility model is not intended to limit the utility model. Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same figure numbers in the drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0020] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0021] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0022] like Figure 1-Figure 3As shown, a novel stone removal basket assembly includes a basket claw, a cavity tube, a basket wire, a heat shrink tube 4 and an outer sheath tube 5, the basket wire includes at least three, the cavity tube is the same as the basket wire, the basket claw includes a first head end tube 101, a second head end tube 102 and a third head end tube 103, the cavity tube includes a first cavity tube 201, a second cavity tube 202 and a third cavity tube 203, the basket wire includes a first basket wire 301, a second basket wire 302 and a third basket wire 303, a first driving wire 301a at one end of the first basket wire 301 is inserted into the first head end tube 101, the first cavity tube 201 is sleeved in the first driving wire 301a and is in contact with the first head end tube 101, and a first fixing wire 301b at the other end of the first basket wire 301 is inserted into the second head end tube 102 and attached to the outer wall of the second cavity tube 202; in a similar cross-assembly manner, a second driving wire 302a at one end of the second basket wire 302 is passed through the second head end tube 102, the second cavity tube 202 is sleeved in the second driving wire 302a and is exactly in contact with the second head end tube 102, and a second fixing wire 302b at the other end of the second basket wire 302 is passed through the third head end tube 103 and attached to the outer wall of the third cavity tube 203; a third driving wire 303a at one end of the third basket wire 303 is passed through the third head end tube 103, the third cavity tube 203 is sleeved in the third driving wire 303a and is exactly in contact with the third head end tube 103, and a third fixing wire 303b at the other end of the third basket wire 303 is passed through the first head end tube 101 and attached to the outer wall of the first cavity tube 201;

[0023] like Figure 4 As shown, the contacting part between the basket claw and the cavity tube is wrapped and fixed with a heat shrink tube 4. Figure 5 As shown, the heat shrink tube 4, the basket claw and one end of the outer sheath tube 5 are fixed by gluing;

[0024] The first driving wire 301a, the second driving wire 302a and the third driving wire 303a are used as driving wires to push forward to open the basket head. Figure 6 shown.

[0025] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A new type of stone extraction basket assembly, characterized in that: The invention comprises a basket claw, a cavity tube, a basket wire, a heat shrink tube (4) and an outer sheath tube (5), wherein the basket wire comprises at least three wires, the cavity tube and the basket wire have the same number, the basket claw comprises a first head end tube (101), a second head end tube (102) and a third head end tube (103), the cavity tube comprises a first cavity tube (201), a second cavity tube (202) and a third cavity tube (203), and the basket wire comprises a first basket wire (301), a second basket wire (302) and a third basket wire (303).

2. The novel stone removal basket assembly according to claim 1 is characterized in that: A first driving wire (301a) at one end of the first basket wire (301) is passed through the first head end tube (101), the first cavity tube (201) is sleeved in the first driving wire (301a) and is in contact with the first head end tube (101), a first fixing wire (301b) at the other end of the first basket wire (301) is passed through the second head end tube (102) and is attached to the outer wall of the second cavity tube (202); a second driving wire (302a) at one end of the second basket wire (302) is passed through the second head end tube (102), the second cavity tube (202) is sleeved in the second driving wire (302a) and is in contact with the second cavity tube (202). The first end tube (102) is exactly in contact with the second end tube (102), the second fixing wire (302b) at the other end of the second basket wire (302) passes through the third first end tube (103) and is attached to the outer wall of the third cavity tube (203); the third driving wire (303a) at one end of the third basket wire (303) passes through the third first end tube (103), the third cavity tube (203) is sleeved in the third driving wire (303a) and is exactly in contact with the third first end tube (103), and the third fixing wire (303b) at the other end of the third basket wire (303) passes through the first first end tube (101) and is attached to the outer wall of the first cavity tube (201).

3. The novel stone removal basket assembly according to claim 1 is characterized in that: One end of the basket claw, the fixed wire portion of the basket wire and the cavity tube are wrapped and tightened by a heat shrink tube (4).

4. The new stone-removing basket assembly according to claim 3 is characterized in that: The heat shrink tube (4), the basket claw, the fixed wire head end of the basket wire and one end of the outer sheath tube (5) are fixed by gluing.

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