Bending-controllable catheter sheath assembly and surgical robot

Abstract

The utility model discloses a catheter sheath assembly with controllable bending and a surgical robot, the catheter sheath assembly comprises a catheter sheath, a catheter seat and a dilator, the catheter sheath assembly with controllable bending further comprises a locking device, the locking device comprises a first locking block, a second locking block, a third locking block and a fourth locking block, the dilator is sleeved with the first locking block, and the second locking block is detachably connected to the catheter seat; the at least one second locking block is arranged between the first locking block and the expander; and the third locking block is arranged on the expander in a sleeving mode and detachably connected to the first locking block, and the third locking block fixes the expander to the first locking block by extruding the second locking block. According to the catheter sheath assembly capable of controlling bending, the second locking block arranged between the first locking block and the dilator is extruded through the third locking block, the dilator can be tightly pressed on the first locking block, then the dilator is fixed to the catheter base, fixing of the dilator is achieved, the third locking block and the first locking block are arranged to be detachable, and the catheter sheath assembly is convenient to use. The length of the dilator can be conveniently and flexibly adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a controllable bending catheter sheath assembly and surgical robot. BACKGROUND

[0002] In the interventional therapy technology, vascular interventional therapy is the highest technical requirement and access barrier subfield, and the related consumables used in the high-value consumables occupy the core position. At present, the controllable bending catheter sheath that can be used with the interventional surgery robot can control the surgery through the catheter sheath under the driving of the interventional surgery robot, and the bending of the catheter sheath can be conveniently and flexibly adjusted. When performing interventional surgery, the front end of the catheter will be expanded by a dilator during the early puncture process, and the length of the dilator will be adjusted according to the actual use, and the corresponding fixing needs to be performed at any time after adjustment. At present, the dilator does not have a corresponding fixing mechanism, and the operator needs to hold it during the previous use, which leads to poor fixing effect. SUMMARY

[0003] The technical problem to be solved by the utility model is to overcome the defect that the extender in the prior art does not have a fixing mechanism, and to provide a controllable bending catheter sheath assembly and surgical robot.

[0004] The utility model solves the above technical problems through the following technical scheme:

[0005] A controllable bending catheter sheath assembly comprises a catheter sheath, a catheter seat and a dilator, and further comprises a locking device, wherein the locking device comprises:

[0006] A first locking block is sleeved on the dilator and detachably connected to the catheter seat;

[0007] At least one second locking block is arranged between the first locking block and the dilator;

[0008] A third locking block is sleeved on the dilator and detachably connected to the first locking block, and the third locking block fixes the dilator to the first locking block by extruding the second locking block.

[0009] In the scheme, the controllable bending catheter sheath assembly extrudes the second locking block arranged between the first locking block and the dilator through the third locking block, can press the dilator on the first locking block, and then fix the dilator to the catheter seat, realizes the fixing of the dilator, and sets the third locking block and the first locking block as detachable, which facilitates the flexible adjustment of the length of the dilator. When disassembling, the third locking block is disassembled first, then the second locking block is removed, and the dilator is pulled out, so that the length adjustment of the dilator can be realized. The first locking block and the catheter seat are detachably connected, which facilitates the installation of the locking device on the catheter seat or the disassembly of the locking device from the catheter seat.

[0010] Preferably, the first locking block has a receiving cavity at one end thereof facing the second locking block, the dilator passes through the receiving cavity, the second locking block is sleeved on the dilator and embedded in the receiving cavity, and the second locking block is elastic.

[0011] In the scheme, when the third locking block extrudes the second locking block, the elastic second locking block extrudes the dilator from all directions, the dilator is uniformly stressed, the dilator is protected, and the locking effect is improved.

[0012] In other alternative schemes, the second locking block is wedge-shaped, so that it can be inelastic, and the function of locking the dilator can be realized by extruding the wedge-shaped second locking block by the third locking block.

[0013] Preferably, the receiving cavity is in a conical structure, the tip of the conical structure is arranged close to the catheter seat, and the second locking block has a conical surface at one end thereof facing the first locking block, which matches the receiving cavity.

[0014] In the scheme, when the third locking block extrudes the second locking block, the elastic second locking block converges towards the tip of the conical structure, the dilator is uniformly stressed, and the locking effect is improved.

[0015] Preferably, an external thread is arranged on the outer circumferential surface of one end of the first locking block facing the catheter seat, and the first locking block is threadedly connected to the catheter seat.

[0016] In the scheme, the above structure is adopted, so that the locking device can be installed on or detached from the catheter seat.

[0017] Preferably, the distance between the third locking block and the first locking block is adjustable.

[0018] In the scheme, the above structure is adopted, so that the force with which the third locking block extrudes the second locking block can be adjusted, and the locking force of the dilator is adjusted.

[0019] Preferably, an external thread is arranged on the outer circumferential surface of one end of the first locking block facing the third locking block, the third locking block has an internal thread, and the third locking block is threadedly connected to the first locking block.

[0020] In the scheme, the above structure is adopted, so that the third locking block can be detachably connected to the first locking block.

[0021] Preferably, the third locking block has a receiving cavity and a protruding part at one end thereof facing the first locking block, and the protruding part is arranged in the receiving cavity and corresponds to the second locking block.

[0022] In the scheme, the convex part corresponding to the second locking block is arranged, so that the third locking block can extrude the second locking block, and the compression effect is improved.

[0023] Preferably, the first locking block has an annular flange on the outer circumferential surface, which is used to abut against the edge of the third locking block.

[0024] In the scheme, the annular flange is used to limit the maximum stroke of the third locking block on the first locking block, so as to limit the compression force of the third locking block and prevent the compression force from being too large and damaging the dilator.

[0025] Preferably, the number of the second locking blocks is multiple, and the multiple second locking blocks are arranged in a ring on the side of the dilator.

[0026] In the scheme, the above structure is arranged, and the third locking block extrudes the second locking block, so that the function of locking the dilator can be realized.

[0027] A surgical robot comprises the controllable bending catheter sheath assembly as described above.

[0028] On the basis of common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred embodiments of the present application are obtained.

[0029] The positive progress effect of the present application is that the controllable bending catheter sheath assembly extrudes the second locking block arranged between the first locking block and the dilator through the third locking block, so that the dilator can be compressed on the first locking block, and then the dilator is fixed on the catheter seat, the fixation of the dilator is realized, and the third locking block and the first locking block are arranged to be detachable, so that the length of the dilator can be adjusted conveniently and flexibly. When disassembling, the third locking block is disassembled first, then the second locking block is removed, and the dilator is pulled out, so that the length adjustment of the dilator can be realized. The first locking block and the catheter seat are detachably connected, so that the locking device can be installed on the catheter seat or disassembled from the catheter seat. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a structure schematic view of the controllable bending catheter sheath assembly of a preferred embodiment of the present application.

[0031] Figure 2 It is a structure schematic view of the controllable bending catheter sheath assembly, the dilator and the locking device of a preferred embodiment of the present application.

[0032] Figure 3 It is an exploded view of the locking device of a preferred embodiment of the present application.

[0033] Figure 4 It is a structure schematic view of the third locking block of an embodiment of the present application.

[0034] Figure 5 A cross-section of the locking device according to a preferred embodiment of the present invention. Figure 1 .

[0035] Figure 6 A cross-section of the locking device according to a preferred embodiment of the present invention. Figure 2 .

[0036] Explanation of reference numerals in the attached figures:

[0037] duct sheath 1

[0038] Guide tube seat 2

[0039] Expander 3

[0040] Locking device 4

[0041] First locking block 41

[0042] Receptacle 411

[0043] Annular flange 412

[0044] Second locking block 42

[0045] Third locking block 43

[0046] 431 accommodating cavity

[0047] Protrusion 432 Detailed Implementation

[0048] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described herein.

[0049] like Figures 1-6 As shown, this embodiment discloses a controllable bending catheter sheath assembly, which includes a catheter sheath 1, a catheter seat 2, and a dilator 3. The catheter sheath 1 is mounted on the catheter seat 2, and the dilator 3 passes through the catheter seat 2 and is inserted into the catheter sheath 1. The controllable bending catheter sheath assembly also includes a locking device 4, through which the dilator 3 passes. The locking device 4 includes a first locking block 41, a third locking block 43, and at least one second locking block 42. The first locking block 41 is sleeved on the dilator 3 and detachably connected to the catheter seat 2. At least one second locking block 42 is disposed between the first locking block 41 and the dilator 3. The third locking block 43 is sleeved on the dilator 3 and detachably connected to the first locking block 41. The third locking block 43 fixes the dilator 3 to the first locking block 41 by pressing the second locking block 42.

[0050] In the embodiment, the controllable bending catheter sheath assembly can press the second locking block 42 between the first locking block 41 and the dilator 3 by the third locking block 43, so as to press the dilator 3 on the first locking block 41, and then fix the dilator 3 on the catheter seat 2, so as to realize the fixation of the dilator 3, and the third locking block 43 and the first locking block 41 are detachable, so as to facilitate the flexible adjustment of the length of the dilator 3. When disassembling, the third locking block 43 is disassembled first, then the second locking block 42 is removed, and the dilator 3 is pulled out, so as to realize the length adjustment of the dilator 3. The first locking block 41 is detachably connected with the catheter seat 2, so as to facilitate the installation of the locking device 4 on the catheter seat 2 or the disassembly of the locking device 4 from the catheter seat 2.

[0051] As shown in Figures 2-6 , one end of the first locking block 41 towards the second locking block 42 has a receiving cavity 411, the dilator 3 passes through the receiving cavity 411, the second locking block 42 is sleeved on the dilator 3 and embedded in the receiving cavity 411, and the second locking block 42 has elasticity. When the third locking block 43 extrudes the second locking block 42, the elastic second locking block 42 extrudes the dilator 3 from all around, the dilator 3 is uniformly stressed, and the locking effect is improved.

[0052] In other alternative embodiments, the second locking block is in the shape of a wedge, so as to be inelastic, and the third locking block extrudes the wedge-shaped second locking block, so as to realize the function of locking the dilator.

[0053] In other alternative embodiments, the number of the second locking blocks is multiple, and the multiple second locking blocks are annularly arranged on the circumferential side of the dilator. The third locking block extrudes the multiple second locking blocks, and the multiple second locking blocks are embedded between the first locking block and the dilator, so as to realize the function of locking the dilator. Preferably, the second locking block is in the shape of a wedge, so as to improve the locking effect.

[0054] As shown in Figure 3 , Figure 5 and Figure 6 , the receiving cavity 411 is in a conical structure, the tip of the conical structure is arranged close to the catheter seat 2, and one end of the second locking block 42 towards the first locking block 41 has a conical surface matched with the receiving cavity 411. When the third locking block 43 extrudes the second locking block 42, the elastic second locking block 42 converges towards the tip of the conical structure, the dilator 3 is uniformly stressed, the dilator 3 is protected, and the locking effect is improved.

[0055] As shown in Figure 3 , Figure 5 and Figure 6 , an outer thread is arranged on the outer circumferential surface of one end of the first locking block 41 towards the catheter seat 2, and the first locking block 41 is threadedly connected with the catheter seat 2, so as to facilitate the installation of the locking device 4 on the catheter seat 2 or the disassembly of the locking device 4 from the catheter seat 2.

[0056] In the embodiment, the third locking block 43 is adjustable relative to the distance of the first locking block 41, so as to adjust the pressing force of the third locking block 43 on the second locking block 42, and then adjust the locking force of the dilator 3.

[0057] As shown in Figure 3 , Figure 5 and Figure 6 , in particular, in the embodiment, the outer periphery of the end of the first locking block 41 towards the third locking block 43 is provided with external threads, the third locking block 43 has internal threads, and the third locking block 43 is threadedly connected to the first locking block 41, so as to detachably connect the third locking block 43 to the first locking block 41.

[0058] As shown in Figure 5 and Figure 6 , the end of the third locking block 43 towards the first locking block 41 has a receiving cavity 431 and a protruding part 432, and the protruding part 432 is arranged in the receiving cavity 431 and corresponds to the second locking block 42. By arranging the protruding part 432 corresponding to the second locking block 42, the third locking block 43 can press the second locking block 42, and the pressing effect is improved. The receiving cavity 431 is used for accommodating the second locking block 42, so as to improve the fixing effect.

[0059] As shown in Figure 3 , Figure 5 and Figure 6 Figure 5 Figure 6 Figure 3 Figure 5 Figure 6 , the outer periphery of the first locking block 41 has an annular flange 412, and the annular flange 412 is used for abutting against the edge of the third locking block 43. The annular flange 412 is used for limiting the maximum stroke of the third locking block 43 on the first locking block 41, and then limiting the pressing force of the third locking block 43, so as to prevent the pressing force from being too large and damaging the dilator 3.

[0060] The embodiment also discloses a surgical robot comprising the controllable bending catheter sheath assembly.

[0061] In the description herein, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0062] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. A controllable bending catheter sheath assembly, comprising a catheter sheath, a catheter seat, and a dilator, characterized in that, The controllable bending catheter sheath assembly also includes a locking device, the locking device comprising: The first locking block is fitted onto the expander and detachably connected to the catheter seat; At least one second locking block is disposed between the first locking block and the expander; A third locking block is fitted onto the expander and detachably connected to the first locking block. The third locking block secures the expander to the first locking block by pressing the second locking block.

2. The controllable bending catheter sheath assembly as described in claim 1, characterized in that, The first locking block has a receiving cavity at one end facing the second locking block, the expander passes through the receiving cavity, the second locking block is sleeved on the expander and embedded in the receiving cavity, and the second locking block is elastic.

3. The controllable bending catheter sheath assembly as described in claim 2, characterized in that, The receiving cavity has a conical structure, with the cone tip of the conical structure located near the conduit seat, and the end of the second locking block facing the first locking block has a conical surface that mates with the receiving cavity.

4. The controllable bending catheter sheath assembly as described in claim 1, characterized in that, The first locking block has an external thread on the outer circumferential surface of the end facing the conduit seat, and the first locking block is threadedly connected to the conduit seat.

5. The controllable bending catheter sheath assembly as described in claim 1, characterized in that, The distance between the third locking block and the first locking block is adjustable.

6. The controllable bending catheter sheath assembly as described in claim 5, characterized in that, The first locking block has an external thread on its outer circumferential surface at one end facing the third locking block, and the third locking block has an internal thread. The third locking block is threadedly connected to the first locking block.

7. The controllable bending catheter sheath assembly as described in claim 6, characterized in that, The third locking block has a receiving cavity and a protrusion at one end facing the first locking block, and the protrusion is located in the receiving cavity and is correspondingly arranged with the second locking block.

8. The controllable bending catheter sheath assembly as described in claim 7, characterized in that, The outer peripheral surface of the first locking block has an annular flange, which is used to abut against the edge of the third locking block.

9. The controllable bending catheter sheath assembly as described in claim 1, characterized in that, The number of the second locking blocks is multiple, and the multiple second locking blocks are arranged around the periphery of the expander.

10. A surgical robot, characterized in that, The surgical robot includes a controllable bending catheter sheath assembly as described in any one of claims 1-9.

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