Bidirectional bending-adjustable guiding sheath tube

Abstract

The utility model discloses a bidirectional bending-adjustable guiding sheathing canal which comprises a canal body, a shell assembly, a moving assembly and a guiding assembly. The pipe body comprises a bending adjusting section, a pushing section and two traction wires, and the shell assembly comprises a shell body; the moving assembly comprises a rotating cylinder, a first threaded sliding block, a second threaded sliding block and two sets of sliding block fixing blocks. The guide assembly comprises a pipe body sleeve, the first threaded sliding block and the second threaded sliding block can reciprocate along the pipe body sleeve, and when the rotating cylinder rotates in different directions, the first threaded sliding block and the second threaded sliding block slide in different directions to pull different traction wires to drive the bending adjusting section to bend in different directions. According to the bidirectional bending-adjustable guiding sheathing canal, the elbow at the far end is bent towards different directions by rotating the rotating cylinder, the bending angle of the far end of the sheathing canal is adjusted, and operation is easy; when the bent pipe is adjusted to any angle, the first threaded sliding block, the second threaded sliding block and the rotating cylinder are in threaded connection, and the bidirectional adjustable bent handle has self-locking performance.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bidirectional adjustable bendable guide sheath. Background Technology

[0002] The primary requirement for interventional surgery is precise lesion location. Besides demanding skilled and patient operation from clinicians, catheters also play a crucial role in interventional procedures. The diverse and complex interfaces between peripheral blood vessels such as visceral arteries, hip arteries, and carotid arteries, and the aorta, present significant challenges to precise lesion localization.

[0003] An adjustable bending sheath is a single-use subcutaneous arterial puncture sheath. The distal end of the device has an adjustable bending angle, providing a pathway for the release and retrieval of other medical devices. Adjustable bending sheaths enable clinicians to precisely locate lesions in complex surgical cases; simultaneously, they reduce surgical time and increase efficiency, making them an irreplaceable medical device in interventional therapy.

[0004] Currently, adjustable bending sheaths on the market are divided into unidirectional adjustable bending sheaths and bidirectional adjustable bending guide sheaths. Existing bidirectional adjustable bending guide sheaths require two adjustment buttons to adjust the bending in one direction separately, lacking linkage. In addition, existing bidirectional adjustable bending guide sheaths either lack self-locking performance or require the design of additional locking mechanisms. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a bidirectional adjustable bending guide sheath, which can achieve bidirectional bending with a single adjustment button, and has a self-locking function, thus avoiding all or some of the above-mentioned defects.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a bidirectional adjustable bendable guide sheath, the bidirectional adjustable bendable guide sheath comprising a tube body, an outer shell assembly, a motion assembly, and a guide assembly;

[0007] The tube body includes a bending section, a pushing section, and a traction wire. One end of the bending section is connected to one end of the pushing section, and one end of the traction wire is fixed to the bending section.

[0008] The housing assembly includes a housing body;

[0009] The motion component includes a rotary cylinder, a first threaded slider, a second threaded slider, and two sets of slider fixing blocks. The rotary cylinder is rotatably connected to the outer shell body. The first threaded slider is threadedly connected to the inner wall of the rotary cylinder. The second threaded slider is threadedly connected to the outer wall of the rotary cylinder. The slider fixing blocks are fitted to the rotary cylinder. The first threaded slider and the second threaded slider are respectively mounted on the two sets of slider fixing blocks.

[0010] The guide assembly includes a tubular sleeve, which is housed within the outer casing, and the axial rotation and radial movement of the tubular sleeve are both restricted.

[0011] The slider fixing block is slidably connected to the tube sleeve. There are two traction wires, which are respectively fixed to the corresponding first threaded slider and second threaded slider. The first threaded slider and the second threaded slider have opposite thread directions. When the rotating cylinder rotates, the first threaded slider and the second threaded slider can slide in different directions along the axial direction of the tube sleeve. The first threaded slider and the second threaded slider pull the corresponding traction wire through the pressure tube, and the traction wire drives the bending section to bend in different directions.

[0012] The outer wall of the rotary cylinder is provided with an outer wall thread, and the inner wall is provided with an inner wall thread.

[0013] The first threaded slider has a first threaded slider thread on one side, which is adapted to the thread on the inner wall of the rotary cylinder; the first threaded slider has a first groove on the other side, and multiple sets of first protrusions are provided on both sides of the first groove.

[0014] The second threaded slider is U-shaped, with the upper and lower parts connected to U-shaped ribs respectively. The upper part of the second threaded slider is provided with a second groove and multiple sets of second protrusions, and the lower part is provided with a second threaded slider thread on the side facing the upper part. The second threaded slider thread is adapted to the thread on the outer wall of the rotary cylinder. The lower part of the second threaded slider is provided with a sliding surface.

[0015] The motion component further includes two pressure tubes, which are fitted to the rotary cylinder. The two pressure tubes are respectively connected to the first threaded slider and the second threaded slider. Two traction wires are respectively connected to the first threaded slider and the second threaded slider through the two pressure tubes. The first groove on the first threaded slider is used to press the pressure tubes.

[0016] The guiding assembly further includes an anti-roll block and a protective sleeve. One end of the anti-roll block is disposed between the outer shell body and the tube sleeve, and the other end of the anti-roll block is disposed between the rotating cylinder and the tube sleeve. The anti-roll block is used to restrict the axial rotation and radial movement of the tube sleeve. The protective sleeve is disposed inside the tube sleeve, and the traction wire passes through the protective sleeve.

[0017] The outer shell body is a hollow cylindrical structure. One end of the inner wall is provided with an outer shell mating flange, and the other end is provided with an outer shell supporting flange. The outer shell mating flange is embedded in the rotating cylinder so that the rotating cylinder can rotate relative to the outer shell body. The outer shell supporting flange is used to connect with the tube sleeve. The inner wall of the outer shell body is also provided with an outer shell sliding surface adjacent to the mating flange. The outer shell sliding surface extends radially along the outer shell body and fits against the outer shell sliding surface, so that the second threaded slider can slide linearly within the outer shell body.

[0018] The outer wall of the outer shell body is provided with a plurality of shell fastening surfaces and shell fastening rings arranged at intervals, and the shell fastening rings are sleeved on the outside of the shell fastening surfaces; the outer surface of the outer shell body is also provided with shell anti-slip texture.

[0019] The outer surface of the rotary cylinder is provided with a rotary cylinder mating groove and a rotary cylinder anti-slip texture, and the rotary cylinder is also provided with a rotary cylinder connecting column, a rotary cylinder mating flange and a rotary cylinder supporting flange.

[0020] The groove of the rotating cylinder is adapted to the outer shell body, the connecting post of the rotating cylinder is used for the installation of two rotating cylinders, the flange of the rotating cylinder abuts against the anti-roll block, and the supporting flange of the rotating cylinder is used to support the anti-roll block.

[0021] The slider fixing block includes a slider fixing block groove, a slider fixing block protrusion, a slider fixing block recess, a slider fixing block mating surface, and a slider fixing block sliding surface;

[0022] The slider fixing block groove is located at the upper end of the slider fixing block and is used to adapt to the pressure pipe; the slider fixing block protrusion and the slider fixing block sliding surface are located at the lower end of the slider fixing block and are used to cooperate with the pipe sleeve; multiple sets of slider fixing block recesses are respectively located on both sides of the slider fixing block groove and are used to nest with the first protrusion and the second protrusion; the slider fixing block contact surface is in contact with the first threaded slider and the second threaded slider.

[0023] The tube sleeve includes a tube sleeve concave rail, a tube sleeve sliding surface, a tube sleeve anti-roll block groove, a tube sleeve mating flange, a tube sleeve groove, and a tube sleeve lug.

[0024] The concave rails of the tube sleeve are located on both sides of the tube sleeve. The slider fixing block is installed inside the concave rails of the tube sleeve and can slide along the length of the concave rails of the tube sleeve. The tube sleeve sliding surfaces are provided on both sides of the concave rails of the tube sleeve, and the tube sleeve sliding surfaces are in contact with the slider fixing blocks. The anti-roll block groove of the tube sleeve is located on the side of the tube sleeve facing the anti-roll block. The tube sleeve mating flange is used for the mating installation of two tube sleeves. The traction wire passes through the tube groove of the tube sleeve. The tube sleeve lug abuts against the outer shell support flange.

[0025] The anti-roll block includes an anti-roll block mating flange, an anti-roll block flange, and an anti-roll block mating groove;

[0026] The anti-roll block mating flange is located at one end of the anti-roll block and is used for the mating installation of two anti-roll blocks; a plurality of anti-roll block flanges are arranged sequentially along the length direction of the anti-roll block and are embedded in the anti-roll block groove of the tube sleeve; the anti-roll block mating groove and the rotating cylinder mating flange are nested together.

[0027] Compared with the prior art, the beneficial effects of the bidirectional adjustable bending guide sheath of this utility model are as follows: by rotating the rotating cylinder, the bending tube at the distal end of the bidirectional adjustable bending guide sheath can be bent in different directions, and the bending angle at the distal end of the sheath can be adjusted, which is simple to operate; when the bending tube is adjusted to any angle, the first threaded slider, the second threaded slider and the rotating cylinder are threadedly connected, and the bidirectional adjustable bending handle has self-locking property. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the bidirectional adjustable bendable guide sheath of this application;

[0030] Figure 2 This is a diagram of the internal structure of the bidirectional adjustable bendable guide sheath of this application;

[0031] Figure 3 yes Figure 1 Structural diagram of the inner and outer shell body;

[0032] Figure 4 yes Figure 1 Structural diagram of the central vortex cylinder;

[0033] Figure 5 yes Figure 1Structural diagram of the central anti-roller block;

[0034] Figure 6 yes Figure 1 Structural diagram of the first threaded slider in the middle;

[0035] Figure 7 yes Figure 1 Structural diagram of the second threaded slider;

[0036] Figure 8 yes Figure 1 Structural diagram of the middle slider fixing block;

[0037] Figure 9 yes Figure 1 Side view of the central tube sleeve;

[0038] Figure 10 This is a schematic diagram of the cross-section of the pipe sleeve.

[0039] Figure label:

[0040] 110-Adjusting section, 120-Pushing section, 130-Traction wire, 140-Developing ring, 210-Outer shell body, 220-Anti-slip sleeve, 230-Outer shell fastening ring, 310-Rolling cylinder, 320-First threaded slider, 330-Second threaded slider, 340-Slider fixing block, 350-Pressure pipe, 410-Pipe sleeve, 420-Anti-roll block, 430-Protective sleeve, 212-Outer shell mating flange, 213-Outer shell supporting flange, 214-Outer shell fastening surface, 215-Outer shell sliding surface, 311-Rolling cylinder anti-slip texture, 312-Rolling cylinder inner wall thread, 313-Rolling cylinder outer wall thread, 314-Rolling cylinder connecting post, 315-Rolling cylinder mating flange, 316-Rolling cylinder mating groove, 317-Rolling cylinder supporting flange. 321-First threaded slider thread, 322-First groove, 323-First protrusion, 331-Second threaded slider thread, 332-Second groove, 333-Second protrusion, 334-U-shaped rib, 335-Sliding surface, 341-Slider fixing block groove, 342-Slider fixing block protrusion rail, 343-Slider fixing block recess, 344-Slider fixing block mating surface, 345-Slider fixing block sliding surface, 411-Tube sleeve recess rail, 412-Tube sleeve sliding surface, 413-Tube sleeve anti-roll block groove, 414-Tube sleeve mating flange, 415-Tube sleeve tube groove, 416-Tube sleeve tube ear, 421-Anti-roll block mating flange, 422-Anti-roll block flange, 423-Anti-roll block mating groove. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0042] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicator will also change accordingly. The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] Please see Figures 1 to 10 , Figure 1 This is a schematic diagram of the structure of the bidirectional adjustable bending guide sheath of this utility model. The bidirectional adjustable bending guide sheath includes a tube body, a shell assembly, a motion assembly, and a guide assembly. The tube body includes an adjusting section 110, a pushing section 120, a traction wire 130, and a imaging ring 140. One end of the adjusting section 110 is connected to one end of the pushing section 120, and one end of the traction wire 130 is fixed to the adjusting section 110. To achieve the bidirectional bending function, there are two traction wires 130, namely the first traction wire and the second traction wire, which are used to pull the adjusting section 110 to bend in different directions. The pushing section 120 is connected to a handle. The adjusting section 110 is used to enter the human body. The imaging ring 140 is fixed to the adjusting section 110 for imaging under ultrasound, facilitating observation of the position of the adjusting section 110. There are multiple imaging rings 140, which can be arranged sequentially.

[0045] The tube body is originally a long straight tube. The bending section 110 of the tube body has an elastic section that can be freely bent within a certain arc range and actively return to its original shape. Two traction wires 130 are disposed within the tube body. The tube body includes a delivery cavity and two traction wire channels. The traction wires 130 pass through the traction wire channels and are disposed in the middle of the tube wall. The two traction wire channels are symmetrically distributed on the cross-section of the tube body. One end of each traction wire 130 is welded to the tube wall of the bending section 110. In one embodiment, it can be connected to the developing ring 140. The other end of the traction wire 130 is led out from the side wall near the pushing section 120 of the tube body. When the first traction wire near the pushing section 120 of the tube body is subjected to tension, the bending section 110 will bend within a certain angle range. If the tension on the first traction wire is removed, the second traction wire will be subjected to tension, and the bending section 110 will bend in the opposite direction. If the tension on both traction wires 130 is removed, the bending section 110 returns to its original straight tube shape.

[0046] The housing assembly includes the housing body 210.

[0047] The motion assembly includes a rotating cylinder 310, a first threaded slider 320, a second threaded slider 330, two sets of slider fixing blocks 340, and a pressure tube 350. The rotating cylinder 310 is rotatably connected to the outer shell 210. The first threaded slider 320 is threadedly connected to the inner wall of the rotating cylinder 310, and the second threaded slider 330 is threadedly connected to the outer wall of the rotating cylinder 310. The slider fixing blocks 340 and the pressure tube 350 are both in contact with the rotating cylinder 310. The first threaded slider 320 and the second threaded slider 330 are respectively installed on different slider fixing blocks 340 in the two sets. There are two pressure tubes 350. The other ends of the two traction wires 130 are respectively fixed to different pressure tubes 350 and connected to the first threaded slider 320 and the second threaded slider 330 through the two pressure tubes 350.

[0048] In one embodiment, the motion assembly includes a rotating cylinder 310, a first threaded slider 320, a second threaded slider 330, two slider fixing blocks 340, and two pressure pipes 350. The first threaded slider 320, slider fixing blocks 340, and pressure pipes 350 are disposed inside the rotating cylinder 310. The second threaded slider 330 has a U-shaped structure and is engaged with the rotating cylinder 310, with its toothed portion located outside the rotating cylinder 310. The thread 321 of the first threaded slider mates with the thread 312 on the inner wall of the rotating cylinder (described below), and the thread 331 of the second threaded slider mates with the thread 313 on the outer wall of the rotating cylinder (described below). The two slider fixing blocks 340 are respectively fixed to the first threaded slider 320 and the second threaded slider 330. One pressure pipe 350 is fixed between the first threaded slider 320 and the first slider fixing block 340. The other pressure pipe 350 is fixed between the second threaded slider 330 and the second slider fixing block 340.

[0049] The guide assembly includes a tube sleeve 410, which is housed within the outer casing 210, and its axial rotation and radial movement are restricted. The tube sleeve 410 also includes an anti-roll block 420 and a protective sleeve 430. The anti-roll block 420 restricts the axial rotation and radial movement of the tube sleeve 410, and the protective sleeve 430 is disposed within the tube sleeve 410. One end of the anti-roll block 420 is located between the outer casing 210 and the tube sleeve 410 to prevent rotation of the anti-roll block 420 relative to the outer casing 210, and the other end is located between the rotating cylinder 310 and the tube sleeve 410 to prevent rotation of the tube sleeve 410 relative to the outer casing 210 and movement of the slider fixing block 340 along the radial direction of the guide assembly. The guide assembly is housed within the outer casing 210. The slider fixing block 340 is slidably connected to the tube sleeve 410. There are at least two traction wires 130, which are respectively fixed to the corresponding first threaded slider 320 and second threaded slider 330. The threads of the first threaded slider 320 and the second threaded slider 330 are opposite. When the rotating cylinder 310 rotates, the first threaded slider 320 and the second threaded slider 330 can slide in different directions along the axial direction of the tube sleeve 410. The first threaded slider 320 and the second threaded slider 330 pull the corresponding traction wire 130 through the pressure tube 350. Different traction wires 130 drive the bending section 110 to bend in different directions.

[0050] Specifically, when the rotating drum 310 is rotated in the first direction, one of the traction wires 130 is pulled, causing the bending section 110 to bend in one direction; when the rotating drum 310 is rotated in the second direction, the other traction wire 130 is pulled, causing the bending section 110 to bend in the other direction. One of the first and second directions is clockwise, and the other is counterclockwise.

[0051] In this embodiment, the guiding assembly includes a tube sleeve 410, an anti-roll block 420, and a protective sleeve 430. The protective sleeve 430 is disposed inside the tube sleeve 410. The tube sleeve lug 416 on the tube sleeve 410 engages with the outer shell support flange 213 on the outer shell body 210, preventing relative rotation between the end of the tube sleeve 410 near the push section 120 and the outer shell body 210. One end of the anti-roll block 420 is disposed between the outer shell body 210 and the tube sleeve 410, restricting the rotation of the anti-roll block 420 relative to the outer shell body 210. The other end of the anti-roll block 420 is disposed between the rotating cylinder 310 and the tube sleeve 410, serving to support the end of the tube sleeve 410 away from the push section 120, hindering the rotation of the tube sleeve 410 relative to the outer shell body 210, and also restricting the radial movement of the slider fixing block 340.

[0052] One end of one of the traction wires 130 is connected to one of the crimping tubes 350, which is disposed between the first threaded slider 320 and the slider fixing block 340. The slider fixing block 340 is slidably disposed on the tube sleeve recess 411 of the tube sleeve 410 described below. The slider fixing block 340 can reciprocate along the tube sleeve recess 411 of the tube sleeve 410. The slider fixing block 340 and the first threaded slider 320 are fixed together. The first threaded slider 320 is provided with a first threaded slider thread 321. The inner wall of the rotary cylinder 310 is provided with a rotary cylinder inner wall thread 312. The first threaded slider 320 is threadedly connected to the inner wall of the rotary cylinder 310 and is located inside the rotary cylinder 310. When the rotary cylinder 310 is rotated, the first threaded slider 320 is restricted from rotating because the slider fixing block 340 fixed to the first threaded slider 320 is located on the tube sleeve concave rail 411. Therefore, the first threaded slider 320 slides along the direction of the tube sleeve concave rail 411 and will not rotate with the rotary cylinder 310.

[0053] Meanwhile, one end of another traction wire 130 is connected to a corresponding crimping tube 350. The crimping tube 350 is disposed between the second threaded slider 330 and the corresponding slider fixing block 340. The slider fixing block 340 is slidably disposed on the tube sleeve concave rail 411 of the tube sleeve 410. The slider fixing block 340 can reciprocate along the tube sleeve concave rail 411. The second threaded slider 330 has a U-shaped structure. One end is fixed to the slider fixing block 340 by a second protrusion 333. The other end of the second threaded slider 330 is provided with a second thread opposite to that of the first threaded slider 320. The outer wall of the rotating cylinder 310 is provided with a threaded slider 331, which is opposite to the inner wall of the rotating cylinder 310. The second threaded slider 330 is threadedly connected to the outer wall of the rotating cylinder 310 and is located outside the rotating cylinder 310. When the rotating cylinder 310 is rotated, the second threaded slider 330 is restricted from rotating because the slider fixing block 340 fixed to the second threaded slider 330 is set on the concave rail 411 of the tube sleeve. Therefore, the second threaded slider 330 slides along the direction of the concave rail 411 of the tube sleeve and will not rotate with the rotating cylinder 310.

[0054] Since the first threaded slider 320 and the second threaded slider 330 are connected to the inner wall thread 312 and the outer wall thread 313 of the rotating cylinder at the same time, when the rotating cylinder 310 is rotated, the first threaded slider 320 and the second threaded slider 330 will slide simultaneously. Since the first threaded slider 320 and the second threaded slider 330 have different rotation directions, when the rotating cylinder 310 is rotated, the first threaded slider 320 and the second threaded slider 330 will slide in opposite directions, so that the two traction wires 130 are subjected to tension respectively, realizing the bidirectional bending function of the bending section 110.

[0055] Furthermore, since the first threaded slider 320, the second threaded slider 330 are connected to the inner wall thread 312 and the outer wall thread 313 of the rotating cylinder, when the rotating cylinder 310 stops rotating, the first threaded slider 320, the second threaded slider 330 and the rotating cylinder 310 form a self-locking mechanism, and no relative movement between them will occur, making the bending adjustment section 110 more precise.

[0056] In this application, the outer wall of the rotary cylinder 310 is provided with an outer wall thread 313, and the inner wall is provided with an inner wall thread 312; one side of the first threaded slider 320 is provided with a first threaded slider thread 321, which is adapted to the inner wall thread 312 of the rotary cylinder; the other side of the first threaded slider 320 is provided with a first groove 322 for pressing the pressure tube 350, and multiple sets of first protrusions 323 are also provided on both sides of the first groove 322. Please refer to Figure 6 The first threaded slider 320 is provided with a first threaded slider thread 321, which can be left-handed or right-handed, and it engages with the thread 312 on the inner wall of the cylinder. The first threaded slider 320 is provided with a first groove 322 below to press the pressure tube 350, and it is also provided with multiple sets of first protrusions 323 below, which engage with the slider fixing block recess 343 on the slider fixing block 340. The first threaded slider 320 slides linearly in the operating handle.

[0057] In this application, the second threaded slider 330 is U-shaped, with its upper and lower parts connected by U-shaped ribs 334. The upper part of the second threaded slider 330 is provided with a second groove 332 and multiple sets of second protrusions 333. The lower part, facing upwards, is provided with a second threaded slider thread 331, which is adapted to the thread 313 on the outer wall of the rotating cylinder. The lower part of the second threaded slider 330 is provided with a sliding surface 335. (See also...) Figure 7 The second threaded slider 330 is U-shaped, and the upper and lower parts are connected into a whole by the U-shaped rib 334 in the middle. The upper surface of the second threaded slider 330 is provided with multiple sets of second protrusions 333, which cooperate with the slider fixing block recess 343 on the slider fixing block 340, and is also provided with a second groove 332, which is used to press the pressure pipe 350 after cooperating with the slider fixing block 340. The middle position of the second threaded slider 330 is provided with a second threaded slider thread 331, which is threadedly engaged with the outer wall thread 313 of the rotating cylinder 310. The lower surface of the second threaded slider 330 is provided with a sliding surface 335, which contacts the outer shell sliding surface 215 of the outer shell body 210 described below. The second threaded slider 330 slides linearly in the operating handle.

[0058] In this application, the outer shell body 210 is a hollow cylindrical structure. One end of the inner wall is provided with an outer shell mating flange 212, and the other end is provided with an outer shell supporting flange 213. The outer shell mating flange 212 is embedded in the rotating cylinder 310 so that the rotating cylinder 310 can rotate relative to the outer shell body 210. The outer shell supporting flange 213 is used to connect with the tube sleeve 410. The inner wall of the outer shell body 210 is also provided with an outer shell sliding surface 215 adjacent to the outer shell mating flange 212. The outer shell sliding surface 215 extends radially along the outer shell body 210. The sliding surface 335 is in contact with the outer shell sliding surface 215, so that the second threaded slider 330 can slide linearly within the outer shell body 210.

[0059] In this application, the outer wall of the outer shell body 210 is also provided with a plurality of outer shell fastening surfaces 214 and outer shell fastening rings 230 arranged at intervals. The outer shell fastening rings 230 are sleeved on the outside of the outer shell fastening surfaces 214 and are used to fasten the outer shell body 210.

[0060] The outer wall of the outer casing 210 has three protrusions and two recesses. The three protrusions of the outer casing 210 are used to connect with the outer casing fastening ring 230, and the two recesses of the outer casing 210 are used to connect with the anti-slip sleeve 220. The length of the outer casing 210 is greater than 80mm, which facilitates gripping, improves the user's grip feel, and prevents slippage during use. The first threaded slider 320 and the second threaded slider 330 are used to form threaded sliding components, and the slider fixing block 340 is used to install and fix the first threaded slider 320 and the second threaded slider 330.

[0061] Please see Figure 3 In this embodiment, the inner wall of the outer shell body 210 is provided with multiple annular pieces. For processing purposes, the outer shell body 210 can be designed to be split in half from the middle, that is, the outer shell body 210 includes a first outer shell and a second outer shell, which are interlocked to form a cylindrical outer shell body 210. Of course, the first outer shell and the second outer shell can also be integrally formed to form a cylindrical outer shell body 210.

[0062] In this application, a rotating cylinder mating groove 316 is also provided on the outer surface of the rotating cylinder 310, and a rotating cylinder connecting post 314, a rotating cylinder mating flange 315, and a rotating cylinder supporting flange 317 are also provided inside the rotating cylinder 310; the rotating cylinder mating groove 316 is adapted to the outer shell body 210, the rotating cylinder connecting post 314 is used for the mating installation of two rotating cylinders 310, the rotating cylinder mating flange 315 abuts against the anti-roll block 420, and the rotating cylinder supporting flange 317 is used to support the anti-roll block 420.

[0063] Please see Figure 4The rotating cylinder 310 is rotatably positioned at the end of the outer casing 210 away from the bending section 110. The operator can hold the outer casing 210 with their left hand and directly grasp the rotating cylinder 310 with their thumb and forefinger, rotating it to bend the bending section 110. For processing needs, the rotating cylinder 310 can also be designed to be split in half in the middle, that is, the rotating cylinder 310 includes a first rotating cylinder and a second rotating cylinder, which interlock to form a rotating cylinder 310.

[0064] Please continue reading. Figure 4 In this embodiment, the rotating cylinder 310 is disposed inside the outer shell body 210 and rotates relative to the outer shell body 210. The rotating cylinder 310 is also a cylindrical structure, including an embedded section and a knob section. The knob section is located outside the outer shell body 210, and the embedded section is located inside the outer shell body 210. The outer shell mating flange 212 engages with the rotating cylinder mating groove 316 to prevent the rotating cylinder 310 from moving in the radial direction. That is, the outer shell mating flange 212 engages with the rotating cylinder embedded section to prevent the rotating cylinder 310 from moving in the radial direction. At the same time, the outer shell mating flange 212 is stuck in the rotating cylinder mating groove 316, thereby preventing the rotating cylinder 310 from moving in the axial direction, making the adjustment of the bending handle more precise.

[0065] In another embodiment, the rotating cylinder 310 is rotatably connected to the outer shell body 210. The rotating cylinder 310 can be disposed in the middle of the outer shell body 210, that is, the middle part of the outer shell body 210 is cut off, the rotating cylinder 310 is disposed between the middle cut-off outer shell bodies 210, and is rotatably connected to the outer shell body 210.

[0066] In this embodiment, the rotating cylinder 310 is rotatably positioned at the end of the outer casing 210 furthest from the pushing section 120. The user holds the outer casing 210 and directly grips the rotating cylinder 310 with their thumb and forefinger, rotating it to bend the bending section 110 of the tube, making operation more convenient. Optionally, the outer wall of the rotating cylinder 310 is provided with anti-slip texture 311 for easier operation.

[0067] In this embodiment, the outer diameter of the rotating part of the rotating cylinder 310 is the same as the outer diameter of the outer shell body 210, making rotation more convenient.

[0068] The middle part of the rotating cylinder 310 is fastened to one end of the outer shell body 210. The inner wall of one end of the outer shell body 210 is provided with an outer shell mating flange 212. The outer shell mating flange 212 is embedded in the rotating cylinder mating groove 316 in the middle part of the rotating cylinder 310, and the rotating cylinder 310 can rotate relative to the outer shell body 210.

[0069] Please continue reading. Figure 4In this embodiment, the inner wall of the rotary cylinder 310 is provided with a rotary cylinder support flange 317 and a rotary cylinder inner wall thread 312, and the outer wall of the rotary cylinder 310 is provided with a rotary cylinder mating groove 316 that mates with the outer shell body 210 and a rotary cylinder outer wall thread 313. For processing needs, the rotary cylinder 310, like the outer shell body 210, can be designed to be split in half from the middle, or it can be integrally formed to form the rotary cylinder 310.

[0070] In this application, the slider fixing block 340 includes a slider fixing block groove 341, a slider fixing block protrusion 342, a slider fixing block recess 343, a slider fixing block mating surface 344, and a slider fixing block sliding surface 345. The slider fixing block groove 341 is located at the upper end of the slider fixing block 340 and is used to fit with the pressure tube 350. The slider fixing block protrusion 342 and the slider fixing block sliding surface 345 are located at the lower end of the slider fixing block 340 and are used to mate with the tube sleeve 410. Multiple sets of slider fixing block recesses 343 are respectively located on both sides of the slider fixing block groove 341 and are used to nest with the first protrusion 323 and the second protrusion 333. The slider fixing block mating surface 344 is mated with the first threaded slider 320 and the second threaded slider 330.

[0071] Please see Figure 8 The upper surface of the slider fixing block 340 is provided with a slider fixing block groove 341 for embedding the pressure tube 350, and multiple sets of slider fixing block recesses 343 are also provided. The slider fixing block mating surface 344 cooperates with the first threaded slider 320 or the second threaded slider 330. The lower surface of the slider fixing block 340 is provided with two sets of slider fixing block convex rails 342. The slider fixing block sliding surface 345 cooperates with the tube sleeve recess 411 on the tube sleeve 410 below. The slider fixing block 340 can slide linearly on the tube sleeve 410 and slide linearly in the operating handle.

[0072] In this application, the tube sleeve 410 includes a tube sleeve recessed rail 411, a tube sleeve sliding surface 412, a tube sleeve anti-roll block groove 413, a tube sleeve mating flange 414, a tube sleeve tube body groove 415, and a tube sleeve lug 416. The concave rails 411 of the tube sleeve are located on both sides of the tube sleeve 420. The slider fixing block 340 is installed inside the concave rails 411 and can slide along the length of the concave rails 411. The concave rails 411 of the tube sleeve are provided with tube sleeve sliding surfaces 412 on both sides, and the tube sleeve sliding surfaces 412 are in contact with the slider fixing block 340. The anti-roll block groove 413 of the tube sleeve is located on the side of the tube sleeve 410 facing the anti-roll block 420. The tube sleeve mating flange 414 is used for the mating installation of two tube sleeves 410. The traction wire 130 passes through the tube groove 415 of the tube sleeve. The tube ear 416 of the tube sleeve abuts against the outer shell support flange 213.

[0073] Please continue reading. Figure 2 The traction wire 130 is angled to the traction wire cavity inside the tube. To prevent the traction wire 130 from cutting the rigid tube sleeve 410, a tube sleeve groove 415 is provided in the tube sleeve 410. The traction wire 130 passes through the protective sleeve 430 and is embedded in the tube sleeve groove 415. Since the traction wire 130 is very thin, in this embodiment, the end of the traction wire 130 is inserted into the crimping tube 350 for a tight fit, and a force is applied to the traction wire 130 through the crimping tube 350.

[0074] A shell support flange 213 is provided on the inner wall of the outer shell body 210 near the pushing section 120 in the tube. The tube sleeve 410 is disposed between the outer shell body 210 and the rotating cylinder 310, and is fixed to the outer shell body 210 by the shell support flange 213 and rotates relative to the rotating cylinder 310. Since the tube is relatively soft, the connection between the tube and the bending handle is prone to bending when connected to the rigid bending handle. Therefore, in this embodiment, the tube is embedded in the tube sleeve 410 to avoid bending of the tube.

[0075] Please see Figure 9 and Figure 10 The tube sleeve 410 has a tube body groove 415. The traction wire 130 passes through the outer wall of the push section 120 and enters the tube body groove 415, where it is protected by the protective sleeve 430. The traction wire 130 can slide freely within the protective sleeve 430. The proximal end of the traction wire 130 is wrapped by the crimping tube 350. Under the compression of the first threaded slider 320 and the slider fixing block 340, the end of the traction wire 130 slides linearly along with the crimping tube 350. In addition, the tube sleeve 410 is also provided with a tube body lug 416, which prevents the tube sleeve 410 from rotating in the operating handle. For processing needs, the tube sleeve 410, like the outer shell 210 and the rotating cylinder 310, can be designed to be split in half from the middle or can be integrally formed to form the tube sleeve 410.

[0076] In this application, the anti-roll block 420 includes an anti-roll block mating flange 421, an anti-roll block flange 422, and an anti-roll block mating groove 423. The anti-roll block mating flange 421 is located at one end of the anti-roll block 420 and is used for the mating installation of two anti-roll blocks 420. Multiple anti-roll block flanges 422 are sequentially arranged along the length of the anti-roll block 420 and are embedded within the anti-roll block groove 413 of the pipe sleeve. The anti-roll block mating groove 423 and the rotating cylinder mating flange 315 are nested together. (See also...) Figure 2 and Figure 5An anti-roll block 420 is provided between the tube sleeve 410 and the outer shell body 210. For processing needs, the anti-roll block 420 can be designed in half, i.e., a first anti-roll block and a second anti-roll block, or it can be integrally formed. One of the anti-roll blocks 420 is provided with an anti-roll block mating flange 421 for mating with the other anti-roll block 420. The anti-roll block 420 is also provided with an anti-roll block flange 422, which is embedded in the anti-roll block groove 413 of the tube sleeve, preventing the tube sleeve 410 from rotating when the rotating cylinder 310 rotates. At the same time, only the first threaded slider 320 and the second threaded slider 330 are allowed to rotate in the operating handle. The anti-roll block 420 is also provided with an anti-roll block mating groove 423, which mates with the rotating cylinder mating flange 315.

[0077] In this application, the outer surfaces of the outer casing 210 and the rotating cylinder 310 are respectively provided with anti-slip textures for the outer casing and anti-slip textures for the rotating cylinder 311. Both the anti-slip textures for the outer casing and the anti-slip textures for the rotating cylinder 311 are used to increase friction during rotation, making it easier for the operator to use.

[0078] The working principle of the bidirectional adjustable bending guide sheath provided in this embodiment is as follows: When interventional surgery is required, the user holds the anti-slip sleeve 220 and grips the rotating cylinder 310 with their thumb and forefinger, rotating the rotating cylinder 310. Since the inner wall of the rotating cylinder 310 is threadedly connected to the first threaded slider 320 and the outer wall of the rotating cylinder 310 is threadedly connected to the second threaded slider 330, the anti-roll block 420 and the tube sleeve 410 restrict the first threaded slider 320, the second threaded slider 330 and the rotating cylinder 310 to rotate synchronously. Therefore, the first threaded slider 320 slides along the direction of the tube sleeve concave rail 411 in a direction away from the pushing section 120, and the second threaded slider 330 slides in the opposite direction. When sliding in the opposite direction, one of the traction wires 130 connected to one of the pressure pipes 350 pulls the bending section 110 of the pipe body, causing the bending section 110 to bend. The more the first threaded slider 320 slides away from the pipe body pushing section 120, the greater the bending angle of the pipe body bending section 110. When the pipe body bending section 110 needs to bend in the opposite direction, the rotating drum 310 is rotated in the opposite direction, and the second threaded slider 330 slides along the pipe body sleeve concave rail 411 away from the pushing section 120. Then, the other traction wire 130 connected to the other pressure pipe 350 pulls the pipe body bending section 110, causing the bending section 110 to bend in the opposite direction.

[0079] Using the bidirectional adjustable bending guide sheath of this utility model, by rotating the rotating cylinder, the first threaded slider slides along the tube sleeve, while the second threaded slider slides in the opposite direction. When the first threaded slider slides away from the far end of the bidirectional adjustable bending guide sheath, it pulls the first traction wire, thereby bending the far end of the bidirectional adjustable bending guide sheath. When the rotating cylinder is rotated in the other direction, the second threaded slider slides along the protective sleeve, while the first threaded slider slides in the opposite direction. The second threaded slider pulls the second traction wire, thereby reducing the bending angle of the far end of the bidirectional adjustable bending guide sheath and bending it in the opposite direction. This allows for bidirectional adjustment of the bending angle of the far end of the sheath, and the operation is simple.

[0080] During the bending process, the second threaded slider and the second threaded slider always slide in opposite directions, exhibiting a linkage;

[0081] When adjusted to any angle, the first threaded slider, the second threaded slider, and the rotating cylinder are threadedly connected, and the bidirectional adjustable bend handle has self-locking properties.

[0082] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A bidirectional adjustable bendable guide sheath, characterized in that, The bidirectional adjustable bendable guide sheath includes a tube body, an outer shell assembly, a motion assembly, and a guide assembly; The tube body includes a bending section, a pushing section, and a traction wire. One end of the bending section is connected to one end of the pushing section, and one end of the traction wire is fixed to the bending section. The housing assembly includes a housing body; The motion component includes a rotary cylinder, a first threaded slider, a second threaded slider, and two sets of slider fixing blocks. The rotary cylinder is rotatably connected to the outer shell body. The first threaded slider is threadedly connected to the inner wall of the rotary cylinder. The second threaded slider is threadedly connected to the outer wall of the rotary cylinder. The slider fixing blocks are fitted to the rotary cylinder. The first threaded slider and the second threaded slider are respectively mounted on the two sets of slider fixing blocks. The guide assembly includes a tubular sleeve, which is housed within the outer casing, and the axial rotation and radial movement of the tubular sleeve are both restricted. The slider fixing block is slidably connected to the tube sleeve. There are two traction wires, which are respectively fixed to the corresponding first threaded slider and second threaded slider. The threads of the first threaded slider and the second threaded slider are opposite. When the rotating cylinder rotates, the first threaded slider and the second threaded slider can slide in different directions along the axial direction of the tube sleeve. The first threaded slider and the second threaded slider pull the corresponding traction wire, and the traction wire causes the bending section to bend in different directions.

2. The bidirectional adjustable bendable guide sheath according to claim 1, characterized in that, The outer wall of the rotary cylinder is provided with an outer wall thread, and the inner wall is provided with an inner wall thread. The first threaded slider has a first threaded slider thread on one side, which is adapted to the thread on the inner wall of the rotary cylinder; the first threaded slider has a first groove on the other side, and multiple sets of first protrusions are provided on both sides of the first groove.

3. The bidirectional adjustable bendable guide sheath according to claim 2, characterized in that, The second threaded slider is U-shaped, with the upper and lower parts connected to U-shaped ribs respectively. The upper part of the second threaded slider is provided with a second groove and multiple sets of second protrusions, and the lower part is provided with a second threaded slider thread on the side facing the upper part. The second threaded slider thread is adapted to the thread on the outer wall of the rotary cylinder; the lower part of the second threaded slider is provided with a sliding surface.

4. The bidirectional adjustable bendable guide sheath according to claim 3, characterized in that, The motion component also includes two pressure tubes, which are fitted to the rotating cylinder. The two pressure tubes are respectively connected to the first threaded slider and the second threaded slider. Two traction wires are respectively connected to the first threaded slider and the second threaded slider through the two pressure tubes. The first groove on the first threaded slider is used to press the pressure tubes. The guiding assembly further includes an anti-roll block and a protective sleeve. One end of the anti-roll block is disposed between the outer shell body and the tube sleeve, and the other end of the anti-roll block is disposed between the rotating cylinder and the tube sleeve. The anti-roll block is used to restrict the axial rotation and radial movement of the tube sleeve. The protective sleeve is disposed inside the tube sleeve, and the traction wire passes through the protective sleeve.

5. The bidirectional adjustable bendable guide sheath according to claim 4, characterized in that, The outer shell body is a hollow cylindrical structure. One end of the inner wall is provided with an outer shell mating flange, and the other end is provided with an outer shell supporting flange. The outer shell mating flange is embedded in the rotating cylinder so that the rotating cylinder can rotate relative to the outer shell body. The outer shell supporting flange is used to connect with the tube sleeve. The inner wall of the outer shell body is also provided with an outer shell sliding surface adjacent to the mating flange. The outer shell sliding surface extends radially along the outer shell body and fits against the outer shell sliding surface, so that the second threaded slider can slide linearly within the outer shell body.

6. The bidirectional adjustable bendable guide sheath according to claim 5, characterized in that, The outer wall of the outer shell body is also provided with a plurality of shell fastening surfaces and shell fastening rings arranged at intervals, and the shell fastening rings are sleeved on the outside of the shell fastening surfaces; the outer surface of the outer shell body is also provided with shell anti-slip texture.

7. The bidirectional adjustable bendable guide sheath according to claim 6, characterized in that, The outer surface of the rotary cylinder is also provided with a rotary cylinder mating groove and a rotary cylinder anti-slip texture, and the rotary cylinder is also provided with a rotary cylinder connecting column, a rotary cylinder mating flange and a rotary cylinder supporting flange; The groove of the rotating cylinder is adapted to the outer shell body, the connecting post of the rotating cylinder is used for the installation of two rotating cylinders, the flange of the rotating cylinder abuts against the anti-roll block, and the supporting flange of the rotating cylinder is used to support the anti-roll block.

8. The bidirectional adjustable bendable guide sheath according to claim 7, characterized in that, The slider fixing block includes a slider fixing block groove, a slider fixing block convex rail, a slider fixing block recess, a slider fixing block mating surface, and a slider fixing block sliding surface; The slider fixing block groove is located at the upper end of the slider fixing block and is used to adapt to the pressure pipe; the slider fixing block protrusion and the slider fixing block sliding surface are located at the lower end of the slider fixing block and are used to cooperate with the pipe sleeve; multiple sets of slider fixing block recesses are respectively located on both sides of the slider fixing block groove and are used to nest with the first protrusion and the second protrusion; the slider fixing block contact surface is in contact with the first threaded slider and the second threaded slider.

9. The bidirectional adjustable bendable guide sheath according to claim 8, characterized in that, The tube sleeve includes a tube sleeve concave rail, a tube sleeve sliding surface, a tube sleeve anti-roll block groove, a tube sleeve mating flange, a tube sleeve groove, and a tube sleeve lug. The concave rails of the tube sleeve are located on both sides of the tube sleeve. The slider fixing block is installed inside the concave rails of the tube sleeve and can slide along the length of the concave rails of the tube sleeve. The tube sleeve sliding surfaces are provided on both sides of the concave rails of the tube sleeve, and the tube sleeve sliding surfaces are in contact with the slider fixing blocks. The anti-roll block groove of the tube sleeve is located on the side of the tube sleeve facing the anti-roll block. The tube sleeve mating flange is used for the mating installation of two tube sleeves. The traction wire passes through the tube groove of the tube sleeve. The tube sleeve lug abuts against the outer shell support flange.

10. The bidirectional adjustable bendable guide sheath according to claim 9, characterized in that, The anti-roll block includes an anti-roll block mating flange, an anti-roll block flange, and an anti-roll block mating groove; The anti-roll block mating flange is located at one end of the anti-roll block and is used for the mating installation of two anti-roll blocks; a plurality of anti-roll block flanges are arranged sequentially along the length direction of the anti-roll block and are embedded in the anti-roll block groove of the tube sleeve; the anti-roll block mating groove and the rotating cylinder mating flange are nested together.

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