Rotatable Repeatedly Openable and Closable Soft Tissue Clip with Variable Diameter Flat Wire Spring Tube

Abstract

The present invention belongs to the field of medical technology, and particularly relates to a rotatable and repeatedly openable and closable variable-diameter flat wire spring tube for soft tissue clamps. The spring tube is helically wound by spring flat wires around a rigid mandrel. The width of the spring flat wires is 0.4 - 0.7 mm, and the thickness is 0.2 - 0.5 mm. The spring tube includes a large-diameter section and a small-diameter section. The transition section from the small-diameter section to the large-diameter section is integrally formed with the small-diameter section and the large-diameter section. One end of the spring tube is connected to an operating handle, and the other end is connected to a foreign body clamp. The large-diameter section is close to the foreign body clamp, and the inner diameter of the large-diameter section is greater than the maximum outer diameter of the foreign body clamp. The spring tube of the present invention is helically wound by spring flat wires. Compared with the traditional spring round wires winding, under the same outer diameter, the internal space of the spring tube is larger, it has good flexibility, a flat and smooth surface, and small frictional resistance.

Description

Technical Field

[0001] The present invention belongs to the field of medical technology, and particularly relates to a rotatable and repeatedly openable and closable soft tissue clamp variable-diameter flat wire spring tube. Background Art

[0002] Hemostatic forceps, biopsy forceps, foreign body forceps, and suture clips for minimally invasive surgical sites are commonly used treatment tools in medical treatment, used for observing, sampling, and treating the internal organs of the human body. The spring hose is one of the essential accessories for preparing hemostatic forceps, biopsy forceps, foreign body forceps, and suture clips for minimally invasive surgical sites.

[0003] The spring tube for minimally invasive surgery is a small-diameter, smooth and flat spring tube produced from stainless steel wire. This spring tube is a key component of the sampling forceps product, and the sampling forceps product is widely used in gastroscopy and colonoscopy examinations and treatments in medical devices. Its main function is to clamp diseased tissues in the human digestive tract for tissue testing, and it can also remove polyps or foreign bodies in the digestive tract.

[0004] When in use, the spring tube needs to meet certain bending flexibility and rotation degree to meet the sampling of tissues at different parts in the digestive tract. The disadvantage of the traditional spring tube is that a connecting piece needs to be processed to connect the small spring tube and the large spring tube, and the connection method is welding. 1. The processing and production requirements of the connecting tube are relatively high, with an accuracy requirement of 0.01 mm, making the processing difficult and thus the processing cost very high; 2. Welding all requires manual operation. Prolonged manual welding can damage the eyes; 3. Welding requires the cooperation of four end faces. If the cooperation is not good, skew will occur. Skew will cause rejection, and rejection will result in all parts being unusable, with a low yield rate and increased costs.

[0005] The spring tube has problems such as a non-smooth surface, large resistance and large friction when the spring tube is inserted into the gastroscope forceps channel, and cannot meet the function of protecting the foreign body clamp. Summary of the Invention

[0006] The present invention aims to provide a rotatable and repeatedly openable and closable soft tissue clamp variable-diameter flat wire spring tube, which has a smooth surface, good flexibility, small frictional resistance when entering the digestive tract, and can play a protective role for the foreign body clamp.

[0007] To achieve the above object, the technical solution of the present invention is: to provide a rotatable and repeatedly openable and closable variable-diameter flat wire spring tube for soft tissue clips. The spring tube is helically wound by flat spring wires around a hard core rod. Since the flat spring wires 4 are helically wound around the hard core rod, one side of the flat spring wire close to the outer wall of the hard core rod is squeezed, and the gap between the adjacent sides of the flat spring wires becomes smaller, making the spring tube more firm. The width of the flat spring wire is 0.4 - 0.7 mm, and the thickness is 0.2 - 0.5 mm. The spring tube includes a large-diameter section and a small-diameter section. The transition section from the small-diameter section to the large-diameter section is integrally formed with the small-diameter section and the large-diameter section. One end of the spring tube is connected to an operating handle, and the other end is connected to a foreign object clip. The large-diameter section is close to the foreign object clip, and the inner diameter of the large-diameter section is greater than the maximum outer diameter of the foreign object clip.

[0008] Preferably, the length of the large-diameter section is 30 - 50 mm.

[0009] Preferably, the width of the flat spring wire is 0.6 mm, and the thickness is 0.38 mm.

[0010] Preferably, the length of the large-diameter section is 40 mm.

[0011] Preferably, the straightness of the spring tube has an error < 25 mm in the free state.

[0012] Preferably, the outer diameter of the large-diameter end is 2.54 - 2.56 mm, and the outer diameter of the small-diameter end is 1.99 - 2.01 mm.

[0013] Preferably, the outer surface of the spring tube is coated with a protective film.

[0014] Preferably, an operating wire is threaded through the hollow cavity of the spring tube. One end of the operating wire is connected to the operating handle, and the other end is connected to the foreign object clip.

[0015] Preferably, the end faces at both axial ends of the spring tube are flat.

[0016] The beneficial effects of the present invention:

[0017] 1. The spring tube of the present invention is helically wound by flat spring wires. Compared with the traditional spring round wires winding, under the same outer diameter, the internal space of the spring tube is larger.

[0018] 2. The transition of the spring tube from the small diameter to the large diameter is a smooth transition of the winding diameter during the winding of the flat spring wires. Compared with the traditional method of separately winding the small-diameter section and the large-diameter section and then welding and connecting them, it can make the outer surface of the spring tube more beautiful, simplify the process, and the overall appearance of the spring tube is smooth, increasing the flexibility.

[0019] 3. The large-diameter section of the bourdon tube is close to the foreign object clamp, and the inner diameter of the large-diameter section is greater than the maximum outer diameter of the foreign object clamp. In this way, when the foreign object clamp is not in use, by pulling the operating wire with the operating handle, the foreign object clamp can be stored in the bourdon tube, which plays a role in dust protection and extends the service life of the foreign object clamp.

[0020] 4. The width of the flat spring wire used in the present invention is 0.6 mm, and the thickness is 0.38 mm. The appropriate width and thickness not only ensure the strength but also ensure the flexibility of the entire bourdon tube, playing a role in protecting the internal operating wire.

[0021] 5. The spring clip of the present invention is applicable to medical hemostatic clips and foreign object clamps. It can sample different parts of the digestive tract according to the human body structure. When cooperating with the endoscope to bend, there is no frictional resistance, reducing the damage to the human body caused by forced bending of the endoscope pipeline. It is more convenient for medical staff to examine patients, accurately locate hemostasis, suture, and sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic cross-sectional structure diagram of the variable-diameter flat spring tube of the rotatable and repeatedly openable and closable soft tissue clip of the present invention.

[0023] Figure 2 It is a schematic assembly structure diagram of the variable-diameter flat spring tube of the rotatable and repeatedly openable and closable soft tissue clip of the present invention, the foreign object clamp, and the operating handle.

[0024] Figure 3 It is a schematic diagram of the end face of the small-diameter section of the variable-diameter flat spring tube of the rotatable and repeatedly openable and closable soft tissue clip of the present invention.

[0025] Figure 4 It is a schematic diagram of the end face of the large-diameter section of the variable-diameter flat spring tube of the rotatable and repeatedly openable and closable soft tissue clip of the present invention.

[0026] Reference numerals in the drawings: small-diameter section 1, transition section 2, large-diameter section 3, flat spring wire 4, foreign object clamp 5, operating handle 6, operating wire 7 DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only the parts related to the present invention are shown in the drawings, rather than all the structures. Other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 4As shown in the figure, the present invention provides a rotatable and repeatedly openable and closable variable-diameter flat wire spring tube for soft tissue clips. The spring tube is spirally wound by spring flat wire 4 around a hard core rod. Since the spring flat wire 4 is spirally wound around the hard core rod, the spring flat wire on one side close to the outer wall of the hard core rod is extruded, and the gap between the adjacent spring flat wires on the side becomes smaller, making the spring tube more firm. The width of the spring flat wire 4 is 0.4 - 0.7 mm, and the thickness is 0.2 - 0.5 mm. The spring tube includes a large-diameter section 3 and a small-diameter section 1. The transition section 2 from the small-diameter section 1 to the large-diameter section 3 is integrally formed with the small-diameter section 1 and the large-diameter section 3. One end of the spring tube is connected to an operating handle 6, and the other end is connected to a foreign object clip 5. The large-diameter section 3 is close to the foreign object clip 5, and the inner diameter of the large-diameter section 3 is greater than the maximum outer diameter of the foreign object clip 5.

[0029] The length of the large-diameter section 3 is 30 - 50 mm.

[0030] The width of the spring flat wire 4 is 0.6 mm, and the thickness is 0.38 mm.

[0031] The straightness of the spring tube has an error < 25 mm in the free state.

[0032] The outer diameter of the large-diameter end 3 is 2.54 - 2.56 mm, and the outer diameter of the small-diameter end 1 is 1.99 - 2.01 mm.

[0033] The outer surface of the spring tube is coated with a protective film.

[0034] An operating wire 7 is threaded through the hollow cavity of the spring tube. One end of the operating wire 7 is connected to the operating handle 6, and the other end is connected to the foreign object clip 5.

[0035] The end faces at both axial ends of the spring tube are flat, smooth without burrs, and without a protruding feel.

[0036] The material of the spring flat wire is 304H stainless steel.

[0037] Example 1

[0038] A rotatable and repeatedly openable and closable variable-diameter flat wire spring tube for soft tissue clips. The spring tube is spirally wound by spring flat wire 4 around a hard core rod. Since the spring flat wire 4 is spirally wound around the hard core rod, the spring flat wire on one side close to the outer wall of the hard core rod is extruded, and the gap between the adjacent spring flat wires on the side becomes smaller, making the spring tube more firm. The width of the spring flat wire 4 is 0.4 mm, and the thickness is 0.2 mm. The spring tube includes a large-diameter section and a small-diameter section. The transition section from the small-diameter section to the large-diameter section 3 is integrally formed with the small-diameter section 1 and the large-diameter section 3. One end of the spring tube is connected to an operating handle 6, and the other end is connected to a foreign object clip 5. The large-diameter section 3 is close to the foreign object clip 5, and the inner diameter of the large-diameter section 3 is greater than the maximum outer diameter of the foreign object clip 5.

[0039] The length of the large-diameter section 3 is 30 mm.

[0040] The width of the spring flat wire 4 is 0.6 mm and the thickness is 0.38 mm.

[0041] The straightness error of the spring tube in the free state is < 25 mm.

[0042] The outer diameter of the large-diameter end 3 is 2.54 mm, and the outer diameter of the small-diameter end 1 is 1.99 mm.

[0043] The outer surface of the spring tube is coated with a protective film. An operating wire 7 is threaded through the hollow cavity of the spring tube. One end of the operating wire 7 is connected to an operating handle 6, and the other end is connected to a foreign object clamp 5. The end faces at both axial ends of the spring tube are flat, smooth without burrs, and without a protruding feel. The material of the spring flat wire 4 is 304H stainless steel.

[0044] Embodiment 2

[0045] A rotatable and repeatedly openable and closable soft tissue clamp with a variable-diameter flat wire spring tube. The spring tube is spirally wound by spring flat wires around a hard core rod. Since the spring flat wires 4 are spirally wound around the hard core rod, the spring flat wires on the side close to the outer wall of the hard core rod are squeezed, and the gap between the adjacent spring flat wire sides becomes smaller, making the spring tube more firm. The width of the spring flat wire 4 is 0.7 mm and the thickness is 0.5 mm. The spring tube includes a large-diameter section 3 and a small-diameter section 1. The transition section from the small-diameter section 1 to the large-diameter section 3 is integrally formed with the small-diameter section 1 and the large-diameter section 3. One end of the spring tube is connected to an operating handle 6, and the other end is connected to a foreign object clamp 5. The large-diameter section 3 is close to the foreign object clamp 5, and the inner diameter of the large-diameter section 3 is larger than the maximum outer diameter of the foreign object clamp 5.

[0046] The length of the large-diameter section 3 is 50 mm.

[0047] The width of the spring flat wire 4 is 0.6 mm and the thickness is 0.38 mm.

[0048] The straightness error of the spring tube in the free state is < 25 mm.

[0049] The outer diameter of the large-diameter end 3 is 2.56 mm, and the outer diameter of the small-diameter end 1 is 2.01 mm.

[0050] The outer surface of the spring tube is coated with a protective film. An operating wire is threaded through the hollow cavity of the spring tube. One end of the operating wire is connected to an operating handle 6, and the other end is connected to a foreign object clamp 5. The end faces at both axial ends of the spring tube are flat, smooth without burrs, and without a protruding feel. The material of the spring flat wire 4 is 304H stainless steel.

[0051] Embodiment 3

[0052] Rotatable and repeatable opening and closing soft tissue clip with variable diameter flat wire spring tube. The spring tube is spirally wound by spring flat wire 4 around a hard core rod. Since the spring flat wire 4 is spirally wound around the hard core rod, one side of the spring flat wire close to the outer wall of the hard core rod is squeezed, and the gap between the adjacent spring flat wire sides becomes smaller, making the spring tube more firm. The width of the spring flat wire 4 is 0.6 mm and the thickness is 0.38 mm. The spring tube includes a large diameter section 3 and a small diameter section 1. The transition section from the small diameter section 1 to the large diameter section 3 is integrally formed with the small diameter section 1 and the large diameter section 3. One end of the spring tube is connected to an operating handle 6, and the other end is connected to a foreign object clip 5. The large diameter section 3 is close to the foreign object clip 5, and the inner diameter of the large diameter section 3 is greater than the maximum outer diameter of the foreign object clip 5.

[0053] The length of the large diameter section 3 is 40 mm.

[0054] The width of the spring flat wire 4 is 0.6 mm and the thickness is 0.38 mm.

[0055] The straightness of the spring tube has an error < 25 mm in the free state.

[0056] The outer diameter of the large diameter end 3 is 2.55 mm, and the outer diameter of the small diameter end 1 is 2.00 mm.

[0057] The outer surface of the spring tube is coated with a protective film. An operating wire 7 is threaded through the hollow cavity of the spring tube. One end of the operating wire 7 is connected to the operating handle 6, and the other end is connected to the foreign object clip 5. The axial two ends of the spring tube are flat, smooth without burrs, and without a protruding feel. The material of the spring flat wire 4 is 304H stainless steel.

[0058] Perform a bending test on Examples 1 to 3. Grasp the spring tube about 100 mm from one axial end of the spring tube, bend the spring tube 180°, and repeat 5 times. Within a distance of 200 mm from one axial end of the spring tube, the maximum bending displacement of the spring tube is not greater than 10 mm.

[0059] The spring tube of the present invention is spirally wound by spring flat wire 4. Compared with the traditional spring round wire winding, in the case of the same outer diameter, the internal space of the spring tube is larger.

[0060] The transition of the spring tube from small diameter to large diameter is a smooth transition of the winding diameter during the winding of the spring flat wire. Compared with the traditional method of separately winding the small diameter section and the large diameter section and then welding and connecting them, it can make the outer surface of the spring tube more beautiful, simplify the process, and the overall appearance of the spring tube is smooth, increasing the flexibility.

[0061] The large-diameter section 3 of the bourdon tube is close to the foreign object clamp 5, and the inner diameter of the large-diameter section 3 is larger than the maximum outer diameter of the foreign object clamp 5. In this way, when the foreign object clamp 5 is not in use, by pulling the operating wire through the operating handle 6, the foreign object clamp 5 can be stored in the bourdon tube, playing a role in dust protection and extending the service life of the foreign object clamp 5.

[0062] The width of the flat spring wire 4 used in the present invention is 0.6 mm and the thickness is 0.38 mm. The appropriate width and thickness not only ensure the strength but also ensure the flexibility of the entire bourdon tube, protect the internal operating wire, meet the rotation requirements of the operating wire, and can be repeatedly bent and rebound.

[0063] The spring clip of the present invention is applicable to medical hemostatic clips and foreign object clips. It can sample different parts of the digestive tract according to the human body structure, cooperate with the endoscope to bend without friction resistance, reduce the damage to the human body caused by forced bending of the endoscope pipeline, and is more convenient for medical staff to examine patients and accurately locate the sample.

[0064] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

[0065] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rotatable and repeatedly openable / closable variable-diameter flat wire spring tube for soft tissue clips, characterized in that, The bourdon tube is formed by helically winding a flattened spring wire around a rigid mandrel. The width of the flattened spring wire is 0.4 - 0.7 mm, and the thickness is 0.2 - 0.5 mm. The bourdon tube includes a large-diameter section and a small-diameter section. The transition section from the small-diameter section to the large-diameter section is integrally formed with the small-diameter section and the large-diameter section. One end of the bourdon tube is connected to an operating handle, and the other end is connected to a foreign object clamp. The large-diameter section is close to the foreign object clamp, and the inner diameter of the large-diameter section is greater than the maximum outer diameter of the foreign object clamp; The straightness error of the bourdon tube in the free state is < 25 mm; An operating wire is threaded through the hollow cavity of the bourdon tube. One end of the operating wire is connected to the operating handle, and the other end is connected to the foreign object clamp; The length of the large-diameter section is 30 - 50 mm; The outer diameter of the large-diameter section is 2.54 - 2.56 mm, and the outer diameter of the small-diameter section is 1.99 - 2.01 mm.

2. The rotatable and repeatedly openable and closable variable-diameter flat wire spring tube for soft tissue clips according to claim 1, wherein The outer surface of the bourdon tube is coated with a protective film.

3. The rotatable and repeatedly openable and closable soft tissue clip with variable diameter flat wire spring tube according to claim 1, characterized in that The axial end faces of the bourdon tube are flat.

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