Bidirectional adjustable bending sheathing canal

Abstract

The invention discloses a bidirectional adjustable bending sheathing canal, which comprises a flexible sheathing canal, one side of the flexible sheathing canal is connected with an adjusting handle, and the flexible sheathing canal is controlled to be bent towards one side through the adjusting handle; the adjusting handle comprises a shell, a transmission assembly is arranged on the side, close to the flexible sheath tube, of the inner side of the shell, and the flexible sheath tube is driven by the transmission assembly to be bent. An adjusting assembly is arranged on one side of the transmission assembly, the moving direction of the transmission assembly is controlled through the adjusting assembly, and the bending angle of the flexible sheathing canal is controlled; according to the device, the adjusting assembly is driven to rotate by rotating the rotary knob, the adjusting assembly is matched with the transmission assembly, the sliding block connected with the traction wire is controlled to move, the front flexible sheathing canal is driven to rotate, the moving distance of the traction wire can be adjusted through the adjusting assembly, and the bending angle of the flexible sheathing canal is accurately controlled.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a bidirectional adjustable bendable sheath. Background Technology

[0002] Interventional therapy has become the preferred treatment for some diseases. Existing adjustable bending instruments achieve unidirectional bending. After the sheath is inserted into the target area through the delivery tube, it is bent. When position adjustment is required, the bending direction is adjusted by rotating the adjustable bending instrument. However, since the adjustable bending instrument needs to be connected to the interventional device behind it, the rotation range is limited to a certain extent.

[0003] Bidirectional adjustable bending sheaths offer multiple options for interventional treatment, facilitating adjustment of the distal sheath direction and improving the controllability of the distal bending direction. This allows for easy control of the distal sheath's movement toward the lesion. However, existing bidirectional adjustable bending sheaths achieve bending by controlling the support on the inner side of the bend, resulting in different forces on both sides of the bend. Since the sheath portion still requires treatment via interventional devices, the diameter of bidirectional adjustable bending sheaths is relatively large, which cannot meet the needs of interventional treatment in target areas with small gaps. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a bidirectional adjustable bending sheath.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bidirectional adjustable bending sheath, comprising:

[0006] Flexible sheath;

[0007] An adjustment handle is connected to one side of the flexible sheath, and the flexible sheath is bent to one side by the adjustment handle;

[0008] The adjusting handle includes a housing, and a transmission component is provided on the inner side of the housing near the flexible sheath. The transmission component drives the flexible sheath to bend.

[0009] An adjustment component is provided on one side of the transmission component, which controls the movement direction of the transmission component and the bending angle of the flexible sheath.

[0010] As a further description of the above technical solution: the transmission assembly includes several slide rails, and a slider is provided on the outer side of the slide rails, the slider moving along the direction of the slide rails.

[0011] As a further description of the above technical solution: a knob is provided on one side of the housing, and the knob is engaged with the slider by a thread.

[0012] As a further description of the above technical solution: a traction wire is provided on the end face of the slider near the flexible sheath, and the traction wire is connected to the inner diameter of the end face of the flexible sheath.

[0013] As a further description of the above technical solution: there are two slide rails and two sliders, one slider is provided on the slide rail, and the threads on the outer sides of the two sliders are in opposite directions.

[0014] As a further description of the above technical solution: the adjustment component is disposed on one side of the knob, including a rotating shaft, and a cavity is opened on the side of the rotating shaft near the knob, and a bending component is placed inside.

[0015] As a further description of the above technical solution: the fixed bending component is connected to the rotating shaft through an elastic component, and the fixed bending component is pushed to fit against the knob through the elastic component.

[0016] As a further description of the above technical solution: the fixed bending component has a plurality of grooves on one end face near the knob, the knob has a boss, and the boss cooperates with any of the grooves.

[0017] As a further description of the above technical solution: a limiting groove is provided on the rotating shaft, and a limiting block is provided on the fixed bending component. The limiting groove and the limiting block cooperate to prevent relative rotation between the fixed bending component and the rotating shaft.

[0018] As a further description of the above technical solution: the knob is connected to the cylinder, which is disposed inside the housing and cooperates with the slider.

[0019] The above technical solution has the following advantages or beneficial effects:

[0020] By turning the knob, the adjustment component is rotated. The adjustment component works in conjunction with the transmission component to control the movement of the slider at the connection point of the traction wire, which in turn drives the flexible sheath in front to rotate. By adjusting the adjustment component, the movement distance of the traction wire can be adjusted, thereby achieving precise control of the bending angle of the flexible sheath. Attached Figure Description

[0021] Figure 1 This is a perspective view of the adjustable bending sheath proposed in this invention;

[0022] Figure 2 This is a schematic diagram of the transmission component in this invention;

[0023] Figure 3 This is a schematic diagram of the bending adjustment component in the present invention. Figure 1 ;

[0024] Figure 4This is a schematic diagram of the bending adjustment component in the present invention. Figure 2 .

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Flexible sheath; 2. Adjusting handle; 21. Housing; 211. Knob; 212. Boss; 22. Transmission assembly; 221. Slide rail; 222. Slider; 223. Traction wire; 23. Adjusting assembly; 231. Rotating shaft; 232. Fixed bending assembly; 233. Elastic assembly; 234. Groove; 235. Limiting groove; 236. Limiting block. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Reference Figures 1-4 The present invention provides an embodiment of a bidirectional adjustable bending sheath, comprising: a flexible sheath 1; an adjusting handle 2 connected to one side of the flexible sheath 1, the adjusting handle 2 controlling the flexible sheath 1 to bend to one side; the adjusting handle 2 includes a housing 21, a transmission component 22 is provided on the inner side of the housing 21 near the flexible sheath 1, the transmission component 22 driving the flexible sheath 1 to bend; an adjusting component 23 is provided on one side of the transmission component 22, the adjusting component 23 controlling the moving direction of the transmission component 22, and controlling the bending angle of the flexible sheath 1.

[0029] In this embodiment, the bending direction and bending angle of the flexible sheath 1 are adjusted by adjusting the handle 2, and the transmission component 22 is moved by rotating the adjustment component 23. During the adjustment process, the bending direction of the flexible sheath 1 is controlled by controlling the rotation direction of the knob 211, and the bending angle of the flexible sheath 2 is controlled by controlling the number of rotations of the knob 211.

[0030] The transmission assembly 22 includes several slide rails 221, and a slider 222 is provided on the outer side of the slide rails 221. The slider moves along the direction of the slide rails 221. A knob 211 is provided on one side of the housing 21. The knob 211 is connected to a cylinder, which is located inside the housing 21 and cooperates with the slider 222. The knob 211 and the slider 222 are engaged by threads.

[0031] In this embodiment, two slide rails 221 are provided, located on both sides of the flexible sheath 1 respectively. Each slide rail 221 is provided with a slider 222. One side of the housing 21 is connected to the cylinder. The inner wall of the cylinder is threaded. The outer side of the slider 222 is provided with a matching thread, and the threads of the two sliders 222 are opposite in direction. Since the slider 222 is limited on the slide rail 221, rotating the housing 21 will not cause the slider 222 to rotate, but will move along the direction of the slide rail 221. Since the threads of the two sliders 222 are opposite in direction, when the knob 211 is rotated, the two sliders 222 move in opposite directions along the direction of the guide rail 221 respectively.

[0032] A traction wire 223 is provided on the end face of the slider 222 near the flexible sheath 1. The traction wire 223 is connected to the inner diameter of the end face of the flexible sheath 1. There are two sliders 221 and two slide rails 222. One slider 222 is provided on the slide rail 221. The threads on the outer sides of the two sliders 222 are in opposite directions.

[0033] In this embodiment, the slider 222 is connected to the flexible sheath 1 by a traction wire 223. By rotating the knob 211, the slider 222 is moved. The two sliders 222 move in opposite directions, so that the traction wires 223 on both sides of the flexible sheath 1 are in a stretched state and a relaxed state, respectively. The traction wire 223 in the stretched state causes the flexible sheath 1 to bend. The side of the traction wire 223 in the relaxed state is located at the outer diameter of the bend. Rotating the knob 211 in the opposite direction restores the bent flexible sheath 1. Continuing to rotate the knob 211 achieves the reverse bending of the flexible sheath 1.

[0034] During the pulling of the traction wire 223, the traction wire 223 remains in a straight line and does not come into contact with other components, thus preventing wear on the traction wire itself and greatly improving safety during the bending process.

[0035] The adjustment component 23 is located on one side of the knob 211 and includes a rotating shaft 231. The rotating shaft 231 has a cavity on the side near the knob 211, and a bending component 232 is placed inside. The bending component 232 is connected to the rotating shaft 231 by an elastic component 233, and the elastic component 233 pushes the bending component 232 to fit against the knob 211.

[0036] In this embodiment, the adjustment component 23 locks the knob 211 after it is rotated a certain angle. The adjustment component 23 includes a rotating shaft 231 and is connected to a fixed bending component 232 through an elastic component 233. The elastic component 233 is specifically a spring. The fixed bending component 232 is located inside the cavity of the rotating shaft 231. At this time, the elastic component 233 is in a compressed state, pushing the fixed bending component 232 to squeeze the knob 211, thereby increasing the friction between the fixed bending component 232 and the knob 211.

[0037] The bending assembly 232 has several grooves 234 on one end face near the knob 211. The knob 211 has a boss 212, which cooperates with any of the grooves 234. A limiting groove 235 is provided on the rotating shaft 231. The bending assembly 232 is provided with a limiting block 236. The limiting groove 235 cooperates with the limiting block 236 to prevent relative rotation between the bending assembly 232 and the rotating shaft 231.

[0038] In this embodiment, the groove 234 and the boss 212 are designed in a V shape. The groove 234 is arranged along the circumferential direction on the end face. The V-shaped groove and V-shaped boss are evenly distributed along the axial direction. The two work together to achieve a better fixed bending effect and prevent the traction wire 223 from slipping when subjected to the ultimate tensile force, which would seriously affect the use effect.

[0039] When the knob 211 is rotated, the torque is transmitted to the bending assembly 232 through the boss 212 and the groove 234. The bending assembly 232 further compresses the spring, causing the limiting block 236 on it to slide along the limiting groove 235 on the rotating shaft 231. The limiting groove 235 plays a guiding and positioning role, thereby completing the rotation action of the knob 211. After rotating a certain angle, the boss 212 on the knob 211 and the groove 234 on the bending assembly 232 are fixed again, realizing the bending function.

[0040] In one specific embodiment, when an interventional procedure is required, the operator holds the housing 21 and adjusts the knob 211. Since the internal thread of the knob 211 is connected to the external threads of the two sliders 222, and the external threads of the two sliders 222 rotate in different directions, when the knob 211 is rotated clockwise, the torque is transmitted to the bending assembly 232 through the boss 212 and the groove 234. The bending assembly 232 further compresses the spring, causing the limiting block 236 on it to slide along the limiting groove 235 on the rotating shaft 231. The groove 116 serves as a guide and positioning feature. This causes the knob 211 and the bending assembly 232 to temporarily disengage, and the two sliders 222 slide synchronously towards each other along the slide rail 221, converting the rotational motion into linear motion. When either slider 222 slides away from the flexible sheath 1, the traction wire 223 connected to the slider 222 pulls the distal end of the flexible sheath 1, causing the flexible sheath 1 to bend. The greater the displacement distance of the slider 222, the greater the bending angle of the tube. When it is necessary to reduce the bending angle of the tube or bend in the opposite direction, the bending knob 211 is rotated counterclockwise, making the operation more convenient and the bending more precise.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A bidirectional adjustable bendable sheath, characterized in that, include: Flexible sheath (1); One side of the flexible sheath (1) is connected to an adjustment handle (2), and the flexible sheath (1) is bent to one side by the adjustment handle (2); The adjustment handle (2) includes a housing (21), and a transmission component (22) is provided on the inner side of the housing (21) near the flexible sheath (1). The transmission component (22) drives the flexible sheath (1) to bend. An adjustment component (23) is provided on one side of the transmission component (22). The adjustment component (23) controls the moving direction of the transmission component (22) and the bending angle of the flexible sheath (1).

2. The bidirectional adjustable bendable sheath according to claim 1, characterized in that: The transmission assembly (22) includes a plurality of slide rails (221), and a slider (222) is provided on the outer side of the slide rails (221), and the slider moves along the direction set by the slide rails (221).

3. The bidirectional adjustable bendable sheath according to claim 2, characterized in that: A knob (211) is provided on one side of the housing (21), and the knob (211) is engaged with the slider (222) by a thread.

4. A bidirectional adjustable bendable sheath according to claim 2, characterized in that: The slider (222) has a traction wire (223) on one end face near the flexible sheath (1), and the traction wire (223) is connected to the inner diameter of the end face of the flexible sheath (1).

5. A bidirectional adjustable bendable sheath according to claim 2, characterized in that: There are two slide rails (221) and two sliders (222). One slider (222) is provided on the slide rail (221), and the threads on the outer sides of the two sliders (222) are in opposite directions.

6. A bidirectional adjustable bendable sheath according to claim 3, characterized in that: The adjustment component (23) is located on one side of the knob (211) and includes a rotating shaft (231). The rotating shaft (231) has a cavity on the side near the knob (211) and a bending component (232) is placed inside.

7. A bidirectional adjustable bendable sheath according to claim 6, characterized in that: The fixed bending component (232) is connected to the rotating shaft (231) through an elastic component (233), and the fixed bending component (232) is pushed to fit against the knob (211) by the elastic component (233).

8. A bidirectional adjustable bendable sheath according to claim 6, characterized in that: The fixed bending assembly (232) has a plurality of grooves (234) on one end face near the knob (211), and the knob (211) has a boss (212) that cooperates with any of the grooves (234).

9. A bidirectional adjustable bendable sheath according to claim 6, characterized in that: A limiting groove (235) is provided on the rotating shaft (231), and a limiting block (236) is provided on the fixed bending component (232). The limiting groove (235) and the limiting block (236) cooperate to prevent relative rotation between the fixed bending component (232) and the rotating shaft (231).

10. A bidirectional adjustable bendable sheath according to claim 3, characterized in that: The knob (211) is connected to the cylinder, which is located inside the housing (21) and cooperates with the slider (222).

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