Sheath structure

Abstract

The present application provides a kind of sheath structure, including sheath and handle, one end of sheath extends into handle, handle includes: shell;Bending mechanism, bending mechanism is movably arranged in shell, and is connected between sheath by silk thread, bending mechanism drives sheath bending by silk thread;Locking member, locking member is movably arranged between shell and bending mechanism, locking member has locking position and unlocking position, when locking member is located in locking position, locking member is located between shell and bending mechanism, and abuts with shell and bending mechanism, to hinder the movement of bending mechanism, when locking member is located in unlocking position, locking member is separated from shell and / or bending mechanism, and bending mechanism can move.The present application solves the problem that adjustable bending sheath cannot be effectively locked in the prior art.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a sheath structure. Background Technology

[0002] In the field of structural heart disease, interventional therapy is an increasingly widespread treatment method. Guided by medical imaging equipment, it involves delivering implants and medications to the lesion via a sheath or other instruments through blood vessels. This minimally invasive procedure minimizes harm to the patient and offers good treatment outcomes. In interventional surgery, compared to fixed-bend sheaths, adjustable-bend sheaths offer distally adjustable bending capabilities. By controlling the position of the distal sheath tip through an adjustment mechanism, the lesion can be reached quickly and accurately, thus shortening the operation time. During the procedure, once the sheath tip is correctly positioned, it is desirable for it to remain in that position for ease of subsequent manipulation. Currently, many adjustable-bend sheaths on the market have a self-locking function, but this cannot be effectively locked, posing a risk of accidental misoperation that could alter the sheath tip position, requiring repeated adjustments by the user. Summary of the Invention

[0003] The main objective of this invention is to provide a sheath structure to solve the problem that adjustable bending sheaths in the prior art cannot be effectively locked.

[0004] To achieve the above objectives, the present invention provides a sheath structure, including a sheath and a handle. One end of the sheath extends into the handle, which includes: a housing; a bending mechanism movably disposed within the housing and connected to the sheath via a thread, the bending mechanism bending the sheath via the thread; and a locking member movably disposed between the housing and the bending mechanism, the locking member having a locked position and an unlocked position. When the locking member is in the locked position, it is located between the housing and the bending mechanism and abuts against them to impede the movement of the bending mechanism. When the locking member is in the unlocked position, it is separated from the housing and / or the bending mechanism, allowing the bending mechanism to move.

[0005] Furthermore, the housing is fitted over at least a portion of the bending mechanism, and a gap is formed between the housing and the bending mechanism, allowing the locking element to extend into or retract from the gap to switch between a locked position and an unlocked position.

[0006] Furthermore, the locking member has a locking ramp, and when the locking member is in the locked position, at least a portion of the locking ramp extends into the gap and abuts against the housing or the bending mechanism.

[0007] Furthermore, the handle also includes: a pull member, which is connected to the locking member and can drive the locking member to the unlock position; a reset member, which abuts against the locking member and can drive the locking member to the locked position; and an operating member, which is connected to the pull member, is movably mounted on the housing, and can drive the locking member to the unlock position by driving the pull member.

[0008] Furthermore, one end of the operating member has a winding portion, one end of the pulling member is connected to the winding portion, and when the operating member rotates, the pulling member winds around the winding portion to drive the locking member to move.

[0009] Furthermore, the winding part includes a first block and a second block that are connected to each other, and the first block and the second block are not arranged in parallel. One end of the pulling member is connected to the connection between the first block and the second block.

[0010] Furthermore, the first part has a semi-circular structure, and the second part has a straight structure, with one end of the straight structure perpendicularly connected to the center of the straight surface of the semi-circular structure.

[0011] Furthermore, there are multiple bending mechanisms, each spaced apart along the axial direction of the outer shell. There are multiple locking components, with at least one locking component between each bending mechanism and the outer shell. There are also multiple pulling components and reset components, each corresponding to a locking component. The pulling components at two adjacent bending mechanisms are simultaneously connected to an operating component. When the operating component rotates, one of the pulling components at two adjacent bending mechanisms abuts against the first block and, driven by the first block, moves the locking component to the unlocked position. At the same time, the other pulling component does not abut against the winding part. After the operating component rotates through a predetermined angle, the other pulling component abuts against the second block and, driven by the second block, moves the locking component to the unlocked position.

[0012] Furthermore, the outer casing is provided with a slide rail, and the locking member is movably disposed on the slide rail. The slide rail extends to the gap between the outer casing and the bending mechanism. The locking member extends into or out of the gap along the slide rail to move in the locked position and the unlocked position. The outer casing is provided with a mounting hole, and the operating member is rotatably disposed in the mounting hole. The mounting hole communicates with the slide rail.

[0013] Furthermore, the operating component includes: a rotating block, which is rotatably disposed in the mounting hole and connected to the pulling component; a button, which is movably disposed on the side of the rotating block, and the side of the mounting hole has a limiting groove, wherein when the rotating block is rotated to the position, the button extends into the limiting groove to limit the rotation of the rotating block; and an operating reset component, which abuts against the button and provides a reset force to the button in the direction of moving into the limiting groove.

[0014] Furthermore, the rotating block includes a large-diameter section and a small-diameter section connected axially in sequence. The large-diameter section is exposed outside the mounting hole, and the small-diameter section is located inside the mounting hole. The side of the large-diameter section has a cavity, and the side of the small-diameter section has a channel communicating with the cavity. The button includes a pressing part and a limiting part. The pressing part is located inside the cavity, and the limiting part is located inside the channel. The channel cooperates with the limiting groove, and the limiting part can extend into the limiting groove to limit the rotation of the rotating block.

[0015] Furthermore, the bending mechanism includes: a guide rail, in which the sheath passes through and is connected to the outer casing; a slider, which is movably mounted on the guide rail, and the sheath is connected to the slider via a thread; a drive block, which is rotatably mounted and threadedly engaged with the slider, and when the drive block rotates, it drives the slider to move along the guide rail through the threaded engagement, thereby bending the sheath; and a knob, which is drivenly connected to the drive block and drives the drive block to rotate. The guide rail, slider, and drive block are all housed within the outer casing, while the knob is exposed outside the outer casing and located at one end of the outer casing.

[0016] Furthermore, there are multiple sliders, and sliders are provided on both sides of the guide rail in the circumferential direction. The sliders on both sides are threadedly engaged with the drive block. Among the sliders on both sides, the thread between one slider and the drive block is a first thread, and the thread between the other slider and the drive block is a second thread. The first thread and the second thread have opposite directions of rotation. And / or the slider includes a mating part and a threaded part. The mating part is mated with the guide rail and extends into the guide rail. The threaded part has an external thread, and the drive block has an internal thread. The external thread and the internal thread mesh. The threaded part has an axially arranged receiving hole, and the wire passes through the receiving hole.

[0017] Furthermore, the guide rail includes: a main body having a guide groove for accommodating a slider, the guide groove extending along the length direction of the guide rail; a mounting block connected to the main body, the drive block and / or the housing having a mounting groove, the mounting block being accommodated in the mounting groove to fix the main body.

[0018] Furthermore, the handle also includes: a cover body that abuts against the knob, with the outer shell and the cover body located at opposite ends of the knob, and the cover body connected to the guide rail; a nose end that is connected to the cover body, with the nose end and the knob located at opposite ends of the cover body, and a sheath passing through the nose end into the handle.

[0019] By employing the technical solution of this invention, a locking member is provided to lock the bending of the sheath after the bending mechanism has bent it. Specifically, the locking member is movably disposed between the outer shell and the bending mechanism. When the bending mechanism is bending, the locking member is in the unlocked position, at which point it does not contact at least one of the outer shell and the bending mechanism, thus not affecting the movement of the bending mechanism and allowing it to bend the sheath. After bending is completed, the locking member moves to the locked position, where it is located between the outer shell and the bending mechanism and abuts against both. The friction between the locking member and the outer shell and the bending mechanism prevents the bending mechanism from moving, thus preventing further bending of the sheath and locking the sheath's state. This effectively locks the sheath after bending, reducing the possibility of misoperation and ensuring the smooth progress of the surgery. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1 A schematic diagram of the sheath structure of the present invention is shown;

[0022] Figure 2 It shows Figure 1 A schematic diagram of the structure without the outer shell;

[0023] Figure 3 A schematic diagram showing the engagement of the locking component, the pulling component, and the resetting component is provided.

[0024] Figure 4 A schematic diagram of the structure at the mounting holes on the outer casing is shown;

[0025] Figure 5 A schematic diagram of the operating component is shown;

[0026] Figure 6 A schematic diagram of the rotating block structure is shown;

[0027] Figure 7 A schematic diagram of the button's structure is shown;

[0028] Figure 8 An exploded view of the operating component is shown;

[0029] Figure 9 A schematic diagram showing the cooperation between the operating component and the locking component, the pulling component, and the resetting component is shown;

[0030] Figure 10 A structural schematic diagram of the operating component from another perspective is shown;

[0031] Figure 11 A schematic diagram of the internal structure of the sheath is shown;

[0032] Figure 12 It shows Figure 11 Exploded view;

[0033] Figure 13 A schematic diagram of the guide rail structure is shown;

[0034] Figure 14 It shows Figure 13 Sectional view along the middle AA direction;

[0035] Figure 15 A schematic diagram of the slider structure is shown;

[0036] Figure 16 A schematic diagram of the drive block structure is shown;

[0037] Figure 17 A schematic diagram of the knob's structure is shown;

[0038] Figure 18 A partial structural schematic diagram of the outer casing is shown;

[0039] Figure 19 A schematic diagram of the cover structure is shown;

[0040] Figure 20 A schematic diagram of another cover structure is shown;

[0041] Figure 21 A schematic diagram of the structure of the tip of the nose is shown.

[0042] The above figures include the following reference numerals:

[0043] 10. Sheath; 20. Handle; 21. Slide; 22. Mounting hole; 221. Limiting groove; 23. Outer shell; 24. Cover; 25. Nose tip; 30. Bending mechanism; 31. Guide rail; 311. Main body; 312. Mounting block; 313. Guide groove; 314. Center hole; 32. Slider; 321. Connecting part; 322. Threaded part; 323. Receiving hole; 33. Drive block; 331. Mounting groove; 332. Protrusion; 34. Knob ; 341, Groove; 40, Locking element; 41, Locking bevel; 42, Protruding post; 50, Pulling element; 60, Reset element; 70, Operating element; 71, Winding part; 711, First block; 712, Second block; 72, Rotating block; 721, Large diameter section; 722, Small diameter section; 723, Cavity; 724, Channel; 73, Button; 731, Pressing part; 732, Limiting part; 74, Operating reset element; 75, Plug; 80, Thread. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0046] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0047] To address the problem that adjustable bendable sheaths in existing technologies cannot be effectively locked, this invention provides a sheath structure.

[0048] like Figures 1 to 21 The diagram shows a sheath structure including a sheath 10 and a handle 20. One end of the sheath 10 extends into the handle 20. The handle 20 includes a housing 23, a bending mechanism 30, and a locking member 40. The bending mechanism 30 is movably disposed within the housing 23 and connected to the sheath 10 via a thread 80. The bending mechanism 30 bends the sheath 10 via the thread 80. The locking member 40 is movably disposed between the housing 23 and the bending mechanism 30. The locking member 40 has a locked position and an unlocked position. When the locking member 40 is in the locked position, it is located between the housing 23 and the bending mechanism 30 and abuts against them to prevent the movement of the bending mechanism 30. When the locking member 40 is in the unlocked position, it is separated from the housing 23 and / or the bending mechanism 30, allowing the bending mechanism 30 to move.

[0049] In this embodiment, a locking member 40 is provided, which can lock the bend of the sheath tube 10 after the bending mechanism 30 bends the sheath tube 10. Specifically, the locking member 40 is movably disposed between the outer shell 23 and the bending mechanism 30. When the bending mechanism 30 is bending, the locking member 40 is in the unlocked position. At this time, the locking member 40 does not contact at least one of the outer shell 23 and the bending mechanism 30, thus not affecting the movement of the bending mechanism 30. This allows the bending mechanism 30 to bend the sheath 10. After the bending is completed, the locking member 40 moves to the locked position. At this time, the locking member 40 is located between the outer shell 23 and the bending mechanism 30, and abuts against both the outer shell 23 and the bending mechanism 30. Thus, the friction between the locking member 40 and the outer shell 23 and the bending mechanism 30 prevents the bending mechanism 30 from moving and from bending the sheath 10 again. This locks the state of the sheath 10, effectively locking the sheath 10 after bending, thereby reducing the possibility of misoperation and ensuring the smooth progress of the operation.

[0050] In this embodiment, the outer shell 23 is sleeved on the outside of at least a portion of the bending mechanism 30. More precisely, the movable part of the bending mechanism 30 is located inside the outer shell 23, and a gap is formed between this part of the bending mechanism 30 and the outer shell 23. In this way, the gap provides space for the locking member 40 to extend and retract, so that the locking member 40 can extend into or retract from the gap, thereby switching between the locked position and the unlocked position to realize the locking and unlocking of the bending mechanism 30.

[0051] In this embodiment, the locking member 40 is made of a rigid material, and its deformation is relatively small. For example... Figure 2 As shown, to further ensure an effective locking effect, the locking member 40 in this embodiment has a locking ramp 41, which is positioned towards the bending mechanism 30. Thus, when the locking member 40 is in the locked position, it extends into the gap, and at least a portion of the locking ramp 41 also extends into the gap. The locking ramp 41 abuts tightly against the movable part of the bending mechanism 30, thereby locking the movement of the bending mechanism 30 and thus locking the sheath 10. Alternatively, the locking ramp 41 of the locking member 40 can also cooperate with the outer casing 23. For example, an inner protrusion can be provided inside the outer casing 23. When the locking member 40 is in the locked position, the locking ramp 41 abuts against the inner protrusion, thereby locking the bending mechanism 30. Alternatively, the locking element 40 can be configured as a block, which can have a certain degree of flexibility. When the locking element 40 enters the gap, it undergoes a certain deformation under the compression of the gap and enters the gap. While in the gap, due to its own flexibility, it tightly abuts against the outer shell 23 and the bending mechanism 30, thereby ensuring the locking effect.

[0052] The specific structural form of the locking member 40 can be set as needed. In this embodiment, the locking member 40 adopts a wedge structure. Of course, the locking member 40 can also adopt other structures such as a rhombus structure, or combine multiple structures together.

[0053] like Figure 3 As shown, in this embodiment, the handle 20 further includes a pulling member 50, a resetting member 60, and an operating member 70. The pulling member 50 is connected to the locking member 40 and can drive the locking member 40 to move towards the unlocked position. The resetting member 60 abuts against the locking member 40 and can drive the locking member 40 to move towards the locked position. The operating member 70 is connected to the pulling member 50, and the operating member 70 is movably disposed on the housing 23 and can drive the locking member 40 to the unlocked position by driving the pulling member 50.

[0054] Specifically, in this embodiment, the locking member 40 has a protruding post 42 on the side away from the inclined plane. The pulling member 50 can be a component such as a pull wire, for example, a thin stainless steel wire rope or a nylon rope, preferably a nylon rope or a softer material. One end of the pulling member 50 is connected to the protruding post 42. Specifically, this can be achieved by making a through hole in the protruding post 42 and threading the pull wire through the through hole. For example, one end can be first connected to a steel needle, and then the steel needle can be inserted into the protruding post 42. Alternatively, any other flexible material can be used to connect to the protruding post 42 in any other way, as long as the pulling member 50 is connected to the locking member 40. The pulling member 50 has the effect of driving the locking member 40 to move in one direction. Since the pulling member 50 is located at the end of the non-locking inclined plane, when the pulling member 50 pulls the locking member 40, it can be driven from the locked position to the unlocked position, thereby unlocking the bending mechanism 30. Conversely to the pulling member 50, the resetting member 60 serves to reset the locking member 40 to the locked position. The resetting member 60 can be a spring or other components. The resetting member 60 abuts against the locking member 40 and is sleeved on the protrusion 42, allowing the protrusion 42 to perform multiple functions. The other end of the resetting member 60 abuts against the operating member 70. In this way, the resetting member 60 ensures that the locking member 40 always has a tendency to move towards the locked position. When the pulling member 50 stops pulling the locking member 40, the locking member 40 can automatically move towards the locked position under the action of the resetting member 60, thereby realizing the automatic locking of the locking member 40. The operating component 70 works in conjunction with the pulling component 50. The operating component 70 is operated by the operator. When the operator operates the operating component 70, the operating component 70 rotates or moves, thereby pulling the pulling component 50. The pulling component 50 drives the locking component 40 to move to the unlocked position. At this time, the movement of the locking component 40 will compress the reset component 60, causing the reset component 60 to accumulate a certain amount of elastic force. After the bending is completed, the operator releases the operating component 70 or operates the operating component 70 in the opposite direction. The pulling component 50 loses its pulling force on the locking component 40, and the locking component 40 can automatically move to the locked position under the action of the reset component 60, thereby locking the bending mechanism 30.

[0055] like Figure 5 As shown, the operating member 70 in this embodiment is rotatably configured. Specifically, a winding portion 71 is provided at one end of the operating member 70, and one end of the pulling member 50 is connected to the winding portion 71. Thus, when the operator rotates the operating member 70, the pulling member 50 can gradually wind around the winding portion 71. As the pulling member 50 winds around, it can drive the locking member 40 to the unlocked position. Of course, in addition to the above configuration, the operating member 70 can also be movable or configured in other ways, as long as the locking member 40 can be moved by the pulling member 50.

[0056] like Figure 9 As shown, in this embodiment, the winding portion 71 includes a first block 711 and a second block 712 connected to each other. The first block 711 and the second block 712 are not parallel. One end of the pulling member 50 is connected to the connection between the first block 711 and the second block 712. Thus, when the operating member 70 rotates, initially, the pulling member 50 may not be in contact with either the first block 711 or the second block 712. At this time, the pulling member 50 will not wrap around the winding portion 71, and the locking member 40 will not move. Only when the operating member 70 continues to rotate through a certain angle will the pulling member 50 come into contact with either the first block 711 or the second block 712. Subsequently, as the operating member 70 continues to rotate, the pulling member 50 gradually wraps around the winding portion 71, thus driving the locking member 40 to move. This arrangement provides a certain delay in unlocking the locking member 40, which can meet the needs of specific situations.

[0057] Preferably, the first block 711 has a semi-circular structure, and the second block 712 has a straight structure. One end of the straight structure is perpendicularly connected to the center of the straight surface of the semi-circular structure to form an approximately T-shaped structure. Since the pulling member 50 is located at the connection between the first part 711 and the second part 712, that is, at the end of the straight structure near the semi-circular structure, when the operating member 70 rotates, due to the above-mentioned structure of the winding part 71, two situations will occur. One is that as soon as the winding part 71 rotates, the pulling member 50 will contact and engage with the arc surface of the semi-circular structure. In this case, if the winding part 71 continues to rotate, the pulling member 50 will wrap around the winding part 71, thereby unlocking the locking member 40 almost immediately. The other is that the winding part 71 rotates in the other direction, and the pulling member 50 does not abut against the semi-circular structure, nor against the straight structure, but remains almost stationary. In this case, the locking member 40 remains stationary. As the operating member 70 continues to rotate, the pulling member 50 abuts against the straight structure, and then the pulling member 50 can wrap around the winding part 71, thereby pulling the locking member 40 to the unlocking position, achieving delayed unlocking.

[0058] Optionally, the number of bending mechanisms 30 can be set to one or more as needed. When multiple bending mechanisms 30 are set, each bending mechanism 30 is spaced apart along the axial direction of the housing 23. Similarly, there can also be multiple locking members 40. At least one locking member 40 is provided between each bending mechanism 30 and the housing 23. There are multiple pulling members 50 and reset members 60, which are provided in one-to-one correspondence with the locking members 40. The pulling members 50 at two adjacent bending mechanisms 30 are simultaneously connected to one operating member 70. This embodiment includes two bending mechanisms 30, two locking members 40, two pulling members 50, two resetting members 60, and one operating member 70. The bending mechanisms 30, locking members 40, pulling members 50, and resetting members 60 are arranged in a one-to-one correspondence. The operating member 70 cooperates with both pulling members 50 and resetting members 60. That is, the operating member 70 is located between the two bending mechanisms 30, the two locking members 40 are respectively arranged on both sides of the operating member 70, both pulling members 50 are connected to the operating member 70, and both resetting members 60 abut against the operating member 70. In this way, in conjunction with the aforementioned structure of the winding part 71 and the two situations described, when the operating member 70 rotates, one of the pulling members 50 at the two adjacent bending mechanisms 30 will almost immediately abut against the first block 711. Then, the pulling member 50 can be wound around the winding part 71 under the drive of the first block 711, thereby driving the locking member 40 to move towards the unlocking position. At the same time, the other pulling member 50 will not abut against either the first block 711 or the second block 712. Therefore, the pulling member 50 remains stationary, and the locking member 40 remains stationary. After the operating member 70 rotates through a predetermined angle, the other pulling member 50 abuts against the second block 712 and then wraps around the winding part 71, thereby causing the pulling member 50 to drive the locking member 40 to move towards the unlocking position under the drive of the second block 712. When the operating member 70 rotates in the opposite direction, the movement patterns of the two locking members 40 and the pulling member 50 are interchanged. However, in any case, one of the two locking members 40 will unlock first, and the other will unlock later. This allows control over the rotation direction and range of the operating member 70 to unlock a specific single locking member 40 or both locking members 40. In this way, multiple bending mechanisms 30 can be unlocked independently, reducing mutual interference and better meeting different needs.

[0059] Of course, if only one locking member 40 is provided or if separate control is not required, the winding part 71 can be directly set into a cylindrical or other shape.

[0060] like Figure 4As shown, in this embodiment, a slide 21 is provided on the outer shell 23. The larger surface of the locking member 40 is in close contact with the slide 21, thereby allowing the locking member 40 to be movably disposed on the slide 21. The slide 21 extends axially along the outer shell 23 and extends to the gap between the outer shell 23 and the bending mechanism 30. In this way, when the locking member 40 moves along the slide 21, it can extend into or retract into the gap, thereby moving between the locked and unlocked positions. In this embodiment, a stop is provided on the side of the slide groove. The stop can abut against the side of the locking member 40, thereby restricting the direction of movement of the locking member 40 and ensuring that the locking member 40 can only move along the slide 21.

[0061] In this embodiment, the outer casing 23 is provided with a mounting hole 22, which is located between the two bending mechanisms 30. The operating member 70 is rotatably inserted through the mounting hole 22, which communicates with the slide rail 21. This allows the operating member 70 to connect and cooperate with the pulling member 50, and also allows the operating member 70 to easily cooperate with the two pulling members 50. Of course, multiple operating members 70 can also be provided, with one operating member 70 corresponding to each pulling member 50 and locking member 40.

[0062] like Figures 5 to 8 As shown, in this embodiment, the operating member 70 includes a rotating block 72, a button 73, and an operating reset member 74. The rotating block 72 is rotatably disposed in the mounting hole 22. The rotating block 72 has the aforementioned winding portion 71, and thus the rotating block 72 is the component connected to the pulling member 50. The button 73 is movably disposed on the side of the rotating block 72. The button 73 can be pressed relative to the rotating block 72. A limiting groove 221 is provided on the side of the mounting hole 22. When the rotating block 72 is rotated to the position, the button 73 extends into the limiting groove 221 to limit the rotation of the rotating block 72. When it is necessary to rotate the rotating block 72, the operator first presses the button 73, and then presses the button 73 out of the limiting groove 221 to rotate the rotating block 72. The operation reset element 74 abuts against the button 73 and provides a reset force for the button 73 to move in the direction of extending into the limiting groove 221. The operation reset element 74 can be a spring, so that the button 73 always has a tendency to extend into the limiting groove 221. When the operator does not press the button 73, the button 73 will automatically extend into the limiting groove 221 when aligned with it, thereby achieving automatic locking. The number of operation reset elements 74 can be set as needed; one or more can be used.

[0063] Preferably, since the operating member 70 may have multiple positions, each corresponding to a different state of the locking member 40, multiple limiting grooves 221 can be provided. In this embodiment, four limiting grooves 221 are provided. The four limiting grooves 221 are arranged sequentially at 90° intervals along the axial direction of the mounting hole 22, respectively corresponding to two locking members 40 being in the locked position, one locking member 40 being in the unlocked position, two locking members 40 being in the unlocked position, and the other locking member 40 being in the unlocked position.

[0064] like Figure 6 and Figure 7 As shown, in this embodiment, the swivel block 72 includes a large-diameter section 721 and a small-diameter section 722 connected axially in sequence, plus the aforementioned winding portion 71. That is, the swivel block 72 includes a large-diameter section 721, a small-diameter section 722 and a winding portion 71 connected in sequence, and the diameter of the winding portion 71 is the smallest. The diameter of the large-diameter section 721 is larger than the diameter of the mounting hole 22, while the diameter of the small-diameter section 722 is smaller than the diameter of the mounting hole 22. Thus, the large-diameter section 721 is exposed outside the mounting hole 22, while the small-diameter section 722 is located inside the mounting hole 22. To accommodate button 73, this embodiment provides a cavity 723 on the side of the large-diameter section 721 and a channel 724 communicating with the cavity 723 on the side of the small-diameter section 722. Correspondingly, button 73 includes a pressing part 731 and a limiting part 732. The pressing part 731 is located within the cavity 723, and the limiting part 732 is located within the channel 724. The channel 724 engages with the limiting groove 221. Thus, the pressing part 731 is located outside the mounting hole 22, facilitating pressing by the operator. The limiting part 732 engages with the limiting groove 221 to achieve limiting. The limiting part 732 extends into the limiting groove 221 to restrict the rotation of the rotating block 72, thereby locking the rotating block 72. Of course, the specific structural form of the operating member 70 is not limited to the method described in this embodiment; other structural forms can be adopted as needed, as long as they can cooperate with the pulling member 50 to drive the locking member 40 to unlock.

[0065] Optionally, a guide post can be provided within the cavity 723, and the operating reset member 74 is sleeved on the outside of the guide post. The cavity 723 can be circular, elliptical, or square, and the channel 724 is elongated. The size of the cavity 723 is larger than the size of the channel 724. Simultaneously, in this embodiment, a limiting post is provided on the side wall of the cavity 723, and a limiting groove is provided on the pressing part 731 of the button 73. The limiting post is located within the limiting groove, thereby limiting the range of motion of the button 73.

[0066] like Figure 10As shown, in order to prevent the operating component 70 from coming out of the mounting hole 22, a plug 75 is provided at the end of the winding part 71 away from the small diameter section 722. The diameter of the plug 75 is larger than the diameter of the mounting hole 22, so that after the rotating block 72 is installed into the mounting hole 22, the plug 75 is installed on the winding part 71, thereby achieving reliable installation of the operating component 70.

[0067] like Figures 11 to 16 As shown, in this embodiment, the bending mechanism 30 includes a guide rail 31, a slider 32, a drive block 33, and a knob 34. The sheath 10 passes through the guide rail 31. The slider 32 is movably mounted on the guide rail 31. The sheath 10 is connected to the slider 32 by a wire 80. That is, in addition to mounting the slider 32, the guide rail 31 is also used to pass through the sheath 10. Therefore, in this embodiment, the guide rail 31 includes not only an axially extending central hole 314 but also a guide groove 313 in the middle. The central hole 314 can communicate with the guide groove 313. The guide groove 313 radially penetrates the inner and outer sides of the guide rail 31, and the guide rail 31 also extends axially. The slider 32 is mounted on the guide groove 313, thereby realizing axial movement. The drive block 33 has a cylindrical structure and is sleeved on the outside of the guide rail 31. The drive block 33 is rotatably mounted and threadedly engaged with the slider 32. Thus, when the drive block 33 rotates, it drives the slider 32 to move along the guide rail 31 through the threaded engagement. The movement of the slider 32 can then drive the sheath 10 to bend through the wire 80. The knob 34 is driven by the drive block 33 and drives the drive block 33 to rotate. The guide rail 31, slider 32, and drive block 33 are all housed within the outer casing 23, while the knob 34 is exposed outside the outer casing 23. In this embodiment, a protrusion 332 is provided on the outer peripheral surface of the drive block 33, while the inner side of the knob 34 has a groove 341. The protrusion 332 and the groove 341 are mated together. Thus, when rotating, the groove 341 can squeeze the protrusion 332 to drive the drive block 33 to rotate, thereby adjusting the bending of the sheath 10.

[0068] like Figure 17 As shown, the knob 34 in this embodiment has a ring-shaped structure, consisting of an inner plastic layer and an outer silicone layer. This plastic-wrapped silicone design effectively enhances the feel of the knob 34. The groove 341 is located on the inner side of the plastic, and the outer surface of the silicone has a wavy anti-slip texture, which not only prevents slipping but also enhances its aesthetic appeal. Of course, the knob 34 can also be made of only one material, either pure plastic or silicone.

[0069] In this embodiment, there are multiple sliders 32, and sliders 32 are provided on both circumferentially opposite sides of the guide rail 31. Each bending mechanism 30 in this embodiment includes two sliders 32, and the two sliders 32 are respectively located on both sides of the guide rail 31. Both sliders 32 are threadedly engaged with the drive block 33, so that when the drive block 33 rotates, it can drive both sliders 32 to move simultaneously. However, the two sliders 32 in this embodiment do not move in the same direction, but in opposite directions. That is, the movement directions of the two sliders 32 are opposite. Specifically, among the two sliders 32, the thread between one slider 32 and the drive block 33 is a first thread, and the thread between the other slider 32 and the drive block 33 is a second thread. The first thread and the second thread have opposite directions of rotation. In this embodiment, the internal thread of the drive block 33 is a bidirectional thread, that is, it has both positive and negative threads. When the drive block 33 rotates, the two sliders 32 slide alternately, that is, one moves forward and the other moves backward, and the forward and backward strokes are the same. When the drive block 33 rotates in the opposite direction, the two sliders 32 will move in opposite directions. In this way, when the threads 80 pulled by the two sliders 32 control the same section of sheath 10, the sheath 10 can bend in opposite directions on the same plane.

[0070] like Figure 15 As shown, in this embodiment, the slider 32 includes a mating portion 321 and a threaded portion 322. The mating portion 321 mates with the guide rail 31 and extends into the guide groove 313 of the guide rail 31, allowing the slider 32 to be mounted on the guide rail 31 and movable axially. The threaded portion 322 is approximately semi-circular, with the mating portion 321 located at the center of its semi-circular straight surface. The threaded portion 322 has an external thread, and the driving block 33 has an internal thread. The external thread and the internal thread mesh, thereby achieving a threaded fit between the driving block 33 and the slider 32. Simultaneously, an axially oriented receiving hole 323 is provided on the end face of the threaded portion 322, through which the wire 80 passes, allowing it to be fixed to the slider 32.

[0071] Since this embodiment is provided with two bending mechanisms 30, in order to prevent the wires 80 of the two bending mechanisms 30 from interfering with each other, the guide grooves 313 and sliders 32 of the two bending mechanisms 30 are offset from each other by a certain angle, preferably 90°. That is, along the circumferential direction, there is a set of guide grooves 313 and sliders 32 of the first bending mechanism 30, a set of guide grooves 313 and sliders 32 of the second bending mechanism 30, another set of guide grooves 313 and sliders 32 of the first bending mechanism 30, and another set of guide grooves 313 and sliders 32 of the second bending mechanism 30.

[0072] like Figure 13 and Figure 14As shown, in this embodiment, the guide rail 31 includes a main body 311 and a mounting block 312. The main body 311 is relatively long and is arranged axially. The main body 311 has a guide groove 313 for accommodating the slider 32 and a central hole 314. Both the central hole 314 and the guide groove 313 extend along the length direction of the guide rail 31. Guide grooves 313 are provided on both opposite sides of the main body 311. Of course, guide grooves 313 can also be provided on only one side. When there is only one guide groove 313, the bending mechanism 30 can only control the distal end of the sheath 10 to bend in one direction. In this embodiment, the outer edge of the guide groove 313 serves as a support surface and abuts against the slider 32. The support surface is approximately perpendicular to the radial direction of the guide groove 313. Mounting block 312 is connected to the main body 311 and located at the end of the main body 311. Mounting block 312 extends radially for a certain distance, thereby forming an I-shaped structure for guide rail 31. Correspondingly, drive block 33 and / or housing 23 have mounting grooves 331, in which mounting block 312 can be accommodated, thereby fixing the guide rail 31 as a whole. The end of drive block 33 has a radially inward flange that contacts the outer surface of the main body 311, thereby assembling guide rail 31 and drive block 33. Since the flange is in line contact with the surface of the main body 311, the friction between drive block 33 and guide rail 31 is greatly reduced, thereby improving the feel during rotation.

[0073] like Figure 1 As shown, in this embodiment, the locking member 40, guide rail 31, slider 32, and drive block 33 are all housed within the outer casing 23. The knob 34 is exposed outside the outer casing 23 and located at one end of the outer casing 23, abutting against the end of the outer casing 23. The outer casing 23 is also connected to the guide rail 31. The outer casing 23 is provided with a mounting groove 331, and a portion of the mounting block 312 of the guide rail 31 can be accommodated within the mounting groove 331 of the outer casing 23, thereby achieving the installation and fixation of the outer casing 23 and the bending mechanism 30. The slide 21, mounting hole 22, and mounting groove 331 are located on the outer casing 23. Furthermore, the handle 20 also includes a cover 24 and a nose end 25. The cover 24 has a frustum structure and abuts against the knob 34. The outer shell 23 and the cover 24 are located at opposite ends of the knob 34. The cover 24 is connected to the guide rail 31 and also has a mounting groove 331. Part of the mounting block 312 of the guide rail 31 is accommodated in the mounting groove 331 of the cover 24, thereby enabling the cover 24 to be installed. The nose tip 25 is connected to the cover 24, and the nose tip 25 and the knob 34 are located at opposite ends of the cover 24. The proximal end of the sheath 10 passes through the nose tip 25 into the handle 20. The nose tip 25 is preferably made of soft silicone material to protect the sheath 10 from breakage.

[0074] In other words, from an external perspective, since this embodiment has two bending mechanisms 30, and both bending mechanisms 30 use the above-described cooperation method with other parts of the handle 20, there are two covers 24. The outer part of the handle 20, along the axial direction, consists of a nose 25, a cover 24, a knob 34 of one bending mechanism 30, a housing 23, a knob 34 of the other bending mechanism 30, and another cover 24. The housing 23 and the guide rail 31, the cover 24 and the guide rail 31, and the nose 25 and the cover 24 can all be fixed using the above-described mounting block 312 and mounting groove 331 embedding method, such as... Figures 18 to 21 As shown. Of course, other connection methods can also be used, as long as the installation and connection can be achieved.

[0075] In this embodiment, a hemostatic valve is installed on the cover 24 furthest from the sheath 10 among the two covers 24, which is used to seal the entire pipeline.

[0076] It should be noted that, for ease of processing and assembly, some components, such as the outer shell 23, cover 24, nose 25, and drive block 33, can be set up separately, divided into two or more parts. During subsequent installation, they can be assembled into a complete component by splicing, gluing, snapping, welding, etc.

[0077] The usage process of the front tube mechanism in this embodiment is as follows:

[0078] Initially, the locking member 40 is in the locked position under the action of the reset member 60, the bending mechanism 30 cannot move, the knob 34 cannot rotate, and the button 73 protrudes from the rotating block 72 and extends into the limit groove 221, thereby preventing the operating member 70 from rotating.

[0079] When bending is required, the operator presses knob 34, which disengages from the limiting groove 221. Rotating operating component 70 causes one of the locking components 40 to unlock almost immediately. At this point, button 73 rotates to align with the next limiting groove 221. Under the action of operating reset component 74, button 73 automatically extends into the limiting groove 221. One bending mechanism 30 is now unlocked, while the other remains locked. If both bending mechanisms 30 need to be unlocked, the operator presses button 73 and continues rotating operating component 70. This rotation causes the other locking component 40 to unlock as well. Button 73 rotates to align with the next limiting groove 221. Under the action of operating reset component 74, button 73 automatically extends into the limiting groove 221, thus keeping both bending mechanisms 30 unlocked. To relock the bending mechanism 30, simply rotate operating component 70 in the opposite direction to its initial position.

[0080] It should be noted that "multiple" in the above embodiments refers to at least two.

[0081] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0082] 1. This solves the problem that adjustable bending sheaths in existing technologies cannot be effectively locked;

[0083] 2. To achieve effective locking after the sheath is bent, thereby reducing the possibility of misoperation and ensuring the smooth progress of the operation;

[0084] 3. Multiple bending mechanisms can be unlocked separately, reducing mutual interference and helping to meet different needs.

[0085] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0086] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0087] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sheath structure, characterized in that, Includes a sheath (10) and a handle (20), one end of the sheath (10) extending into the handle (20), the handle (20) comprising: Outer shell (23); A bending mechanism (30) is movably disposed inside the outer shell (23) and connected to the sheath tube (10) by a thread (80). The bending mechanism (30) drives the sheath tube (10) to bend through the thread (80). A locking member (40) is movably disposed between the housing (23) and the bending mechanism (30). The locking member (40) has a locked position and an unlocked position. When the locking member (40) is in the locked position, the locking member (40) is located between the housing (23) and the bending mechanism (30) and abuts against the housing (23) and the bending mechanism (30) to prevent the movement of the bending mechanism (30). When the locking member (40) is in the unlocked position, the locking member (40) is separated from the housing (23) and / or the bending mechanism (30), and the bending mechanism (30) can move. The outer casing (23) is fitted over at least a portion of the bending mechanism (30), and a gap is formed between the outer casing (23) and the bending mechanism (30). The locking member (40) can extend into or out of the gap to switch between the locked position and the unlocked position. The locking member (40) has a locking ramp (41). When the locking member (40) is in the locked position, at least a portion of the locking ramp (41) extends into the gap and abuts against the housing (23) or the bending mechanism (30).

2. The sheath structure according to claim 1, characterized in that, The handle (20) also includes: A pull member (50) is connected to the locking member (40) and can drive the locking member (40) to move toward the unlocked position; A reset member (60) abuts against the locking member (40) and is able to drive the locking member (40) to move toward the locked position; An operating element (70) is connected to the pulling element (50). The operating element (70) is movably disposed on the housing (23) and can drive the locking element (40) to the unlocking position by driving the pulling element (50).

3. The sheath structure according to claim 2, characterized in that, One end of the operating member (70) has a winding portion (71), one end of the pulling member (50) is connected to the winding portion (71), and when the operating member (70) rotates, the pulling member (50) wraps around the winding portion (71) to drive the locking member (40) to move.

4. The sheath structure according to claim 3, characterized in that, The winding part (71) includes a first block (711) and a second block (712) connected to each other. The first block (711) and the second block (712) are not parallel to each other. One end of the pulling member (50) is connected to the connection between the first block (711) and the second block (712).

5. The sheath structure according to claim 4, characterized in that, The first block (711) has a semi-circular structure, and the second block (712) has a straight structure, with one end of the straight structure perpendicularly connected to the center of the straight surface of the semi-circular structure.

6. The sheath structure according to claim 5, characterized in that, There are multiple bending mechanisms (30), each of which is spaced apart along the axial direction of the outer shell (23). There are multiple locking members (40), and at least one locking member (40) is provided between each bending mechanism (30) and the outer shell (23). There are multiple pulling members (50) and multiple resetting members (60), which are arranged one-to-one with the locking members (40). The pulling members (50) at two adjacent bending mechanisms (30) are simultaneously connected to one operating member (70). When the operating member (70) rotates, the two adjacent pulling members (50) are simultaneously connected to one operating member (70). In the pulling member (50) at the bending mechanism (30), one of the pulling members (50) abuts against the first block (711) and drives the locking member (40) to move toward the unlocking position under the drive of the first block (711). At the same time, the other pulling member (50) does not abut against the winding part (71). After the operating member (70) rotates through a predetermined angle, the other pulling member (50) abuts against the second block (712) and drives the locking member (40) to move toward the unlocking position under the drive of the second block (712).

7. The sheath structure according to claim 2, characterized in that, The outer casing (23) is provided with a slide rail (21), and the locking member (40) is movably disposed on the slide rail (21). The slide rail (21) extends to the gap between the outer casing (23) and the bending mechanism (30). The locking member (40) extends into or out of the gap along the slide rail (21) to move in the locked position and the unlocked position. The outer casing (23) is provided with a mounting hole (22), and the operating member (70) is rotatably disposed in the mounting hole (22). The mounting hole (22) communicates with the slide rail (21).

8. The sheath structure according to claim 7, characterized in that, The operating element (70) includes: A swivel block (72) is rotatably disposed in the mounting hole (22) and connected to the pull member (50); Button (73), which is movably disposed on the side of the rotating block (72), and the side of the mounting hole (22) has a limiting groove (221). When the rotating block (72) is rotated to the position, the button (73) extends into the limiting groove (221) to limit the rotation of the rotating block (72). An operation reset member (74) abuts against the button (73) and provides the button (73) with a reset force to move in the direction of extending into the limiting groove (221).

9. The sheath structure according to claim 8, characterized in that, The rotating block (72) includes a large-diameter section (721) and a small-diameter section (722) connected axially in sequence. The large-diameter section (721) is exposed in the mounting hole (22), and the small-diameter section (722) is located in the mounting hole (22). The side of the large-diameter section (721) has a cavity (723), and the side of the small-diameter section (722) has a channel (724) communicating with the cavity (723). The button (73) includes a pressing part (731) and a limiting part (732). The pressing part (731) is located in the cavity (723), and the limiting part (732) is located in the channel (724). The channel (724) cooperates with the limiting groove (221), and the limiting part (732) can extend into the limiting groove (221) to limit the rotation of the rotating block (72).

10. The sheath structure according to any one of claims 1 to 9, characterized in that, The bending mechanism (30) includes: The guide rail (31) is through which the sheath (10) passes, and the guide rail (31) is connected to the outer shell (23); A slider (32) is movably mounted on the guide rail (31), and the sheath (10) is connected to the slider (32) via the wire (80); A drive block (33) is rotatably configured and threadedly engaged with the slider (32). When the drive block (33) rotates, it drives the slider (32) to move along the guide rail (31) through the threaded engagement, thereby causing the sheath (10) to bend. The knob (34) is connected to the drive block (33) and drives the drive block (33) to rotate. The guide rail (31), the slider (32), and the drive block (33) are all housed in the outer shell (23). The knob (34) is exposed outside the outer shell (23) and located at one end of the outer shell (23).

11. The sheath structure according to claim 10, characterized in that, There are multiple sliders (32), and sliders (32) are provided on both circumferentially opposite sides of the guide rail (31). Each slider (32) on both sides is threadedly engaged with the drive block (33). Of the two sliders (32), one slider (32) has a first thread engaging with the drive block (33), and the other slider (32) has a second thread engaging with the drive block (33). The first thread and the second thread have opposite directions of rotation; and / or The slider (32) includes a mating part (321) and a threaded part (322). The mating part (321) is mated with the guide rail (31) and extends into the guide rail (31). The threaded part (322) has an external thread, and the drive block (33) has an internal thread. The external thread meshes with the internal thread. The threaded part (322) has an axially arranged receiving hole (323), and the wire (80) passes through the receiving hole (323).

12. The sheath structure according to claim 10, characterized in that, The guide rail (31) includes: The main body (311) has a guide groove (313) for accommodating the slider (32), the guide groove (313) extending along the length direction of the guide rail (31); Mounting block (312) is connected to the main body (311), the driving block (33) and / or the housing (23) have mounting groove (331), the mounting block (312) is accommodated in the mounting groove (331) to fix the main body (311).

13. The sheath structure according to claim 10, characterized in that, The handle (20) also includes: The cover (24) abuts against the knob (34), and the outer shell (23) and the cover (24) are respectively located at both ends of the knob (34), and the cover (24) is connected to the guide rail (31); The nose tip (25) is connected to the cover (24), and the nose tip (25) and the knob (34) are located at the two ends of the cover (24), respectively. The sheath (10) passes through the nose tip (25) and is inserted into the handle (20).

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