CN219331588U

CN219331588U - Snake bone and surgical instrument

Info

Publication number: CN219331588U
Application number: CN202320364332.2U
Authority: CN
Inventors: 刘放; 王建辰
Original assignee: Shenzhen Edge Medical Co Ltd
Current assignee: Shenzhen Edge Medical Co Ltd
Priority date: 2023-02-22
Filing date: 2023-02-22
Publication date: 2023-07-14
Anticipated expiration: 2033-02-22

Abstract

The utility model discloses a snake bone and a surgical instrument, wherein the snake bone comprises: the first joint of the two adjacent joints is provided with a first male hinging part, the second joint of the two adjacent joints is provided with a first female hinging part, the first male hinging part comprises a convex first outer cambered surface, the first female hinging part comprises a concave first inner cambered surface, and the first male hinging part is rotatably embedded in the first inner cambered surface of the first female hinging part through the first outer cambered surface; the connecting beam is integrally arranged with the first joint and the second joint, one end of the connecting beam is connected with the first male hinge part, and the other end of the connecting beam is connected with the first female hinge part. In the bending process of the snake bone, the male hinge parts and the female hinge parts of two adjacent joints are mutually matched and protect the connecting beam between the joints, so that the tensile and torsional properties of the snake bone are improved, and the connecting beam can also ensure the curvature continuity of the adjacent joints; when the snake bone is not under axial tension, the snake bone can keep a natural straight state under the action of the connecting beam.

Description

Snake bone and surgical instrument

Technical Field

The embodiment of the utility model relates to the technical field of medical instruments, in particular to snake bone and a surgical instrument.

Background

With the development of medical technology, endoscope technology has been widely used in various surgical and diagnostic scenes, and endoscopes are used for a doctor or an assistant thereof to visually inspect a difficult-to-reach position of an organ or the like in a human body so as to observe a surgical environment or pathological conditions of tissues, organs or the like.

Generally, an endoscope includes an elongated insertion tube, and a visual inspection device such as a camera is provided at a distal tip of the elongated insertion tube. In order to operate the endoscope in the human body, the distal end of the long insertion tube is provided with a snake bone capable of realizing bending movement, and a doctor can adjust the tip of the end part of the snake bone to a required direction by changing the bending state of the snake bone, so that the observation view angle is changed.

The existing snake bone is usually formed by hinging a plurality of independent joints in pairs, so that the processing and manufacturing process of the snake bone is complex, and the shape of the snake bone in the bending process can be uncontrolled (for example, the bending directions of two adjacent groups of joints can be opposite) due to the fact that the friction force between the adjacent joints is too small, so that the curvature of each section of the snake bone is discontinuous, and the control precision of the distal end of the snake bone is affected.

Disclosure of Invention

In view of the defects existing in the prior art, the utility model provides the snake bone and the surgical instrument, which can simplify the processing and manufacturing process of the snake bone, ensure that the curvature of each section of the snake bone is continuous, and ensure the control precision of the distal end of the snake bone.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a snake bone, comprising:

the joints are connected in pairs along the axial direction of the snake bones, a first male hinging part is arranged on a first joint of two adjacent joints, a first female hinging part is arranged on a second joint of two adjacent joints, the first male hinging part comprises a convex first extrados, the first female hinging part comprises a concave first intrados, and the first male hinging part is rotatably embedded in the first intrados of the first female hinging part through the first extrados;

the connecting beam is integrally arranged with the first joint and the second joint, one end of the connecting beam is connected with the first male hinging part, and the other end of the connecting beam is connected with the first female hinging part.

As one embodiment, the connecting beam is parallel to the axial direction of the snake bone; and/or at least one of the first male hinge part and the first female hinge part is symmetrically disposed with respect to the connection beam.

As one embodiment, a second female hinge part is further arranged on the first joint of the two adjacent joints, and the second female hinge part comprises a concave second intrados;

the second joint of the two adjacent joints is further provided with a second male hinging part which surrounds the connecting beam therein, the second male hinging part comprises a convex second outer cambered surface, the second outer cambered surface and the first inner cambered surface are concentrically arranged, and the second male hinging part is rotatably embedded in the second inner cambered surface of the second female hinging part through the second outer cambered surface.

As one implementation mode, the second male hinge part is a C-shaped arm, the C-shaped arm is clamped between the first male hinge part and the second female hinge part, and the inner arc surface and the outer arc surface of the C-shaped arm are respectively matched with the first outer arc surface and the second inner arc surface in a rotatable manner.

As one embodiment, the inner surface of the first male hinge part and/or the first female hinge part is provided with a concave part, and the connecting beam is connected in the concave part of the first male hinge part and/or the first female hinge part.

As one embodiment, an arc-shaped chamfer is formed between the concave portion and the connecting beam.

As one embodiment, the first male hinge portion and the first female hinge portion enclose a hollowed portion surrounding the connecting beam and penetrating through the snake bone.

As one embodiment, the closer to the head end of the snake bone, the smaller the width of each of the connecting beams and/or the longer the length of each of the connecting beams.

As one embodiment, the width of the connecting beam near the head end of the snake bone is smaller than the width of the connecting beam far away from the head end of the snake bone.

Another object of the present utility model is to provide a surgical apparatus, which includes the above snake bone and an imaging module disposed at a head end of the snake bone.

According to the utility model, the rotation connection is realized by matching the male and female hinge parts of two adjacent joints of the snake bone, and the two joints which rotate mutually are integrally connected at the rotation connection part of the joints through the connecting beam, so that the whole snake bone is integrally arranged; when the snake bones are not subjected to axial tension, the adjacent joints can restore to the coaxial state under the action of the connecting beam, so that the snake bones keep a natural straight state.

Drawings

FIG. 1A is an exploded view of a surgical instrument according to an embodiment of the present utility model;

FIG. 1B is a schematic view of the internal structure of a surgical instrument according to an embodiment of the present utility model;

FIG. 2 shows an enlarged partial view of a snake bone according to an embodiment of the utility model;

FIG. 3 shows an enlarged partial view of another snake bone according to an embodiment of the utility model;

FIG. 4 shows a partial enlarged view of another snake bone according to an embodiment of the utility model;

FIG. 5 is an enlarged view of FIG. 4 at A;

FIG. 6 shows a partial enlarged view of another snake bone according to an embodiment of the utility model;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

In this application, the terms "disposed," "configured," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

In this application, "distal" and "proximal" are used as directional terms that are conventional in the art of interventional medical devices, where "distal" refers to the end of the procedure that is distal to the operator and "proximal" refers to the end of the procedure that is proximal to the operator.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

As shown in fig. 1A and 1B, an embodiment of the present utility model provides a surgical instrument, which includes a snake bone 10, a catheter 20 and a tip 40, wherein the catheter 20 is connected to a proximal end of the snake bone 10, the tip 40 is connected to a distal end (i.e., a head end) of the snake bone 10, the camera module C is embedded in the tip 40, and the surgical instrument can be used as an endoscope. In one embodiment, the outer surface of the snake bone 10 may be further wrapped with a protecting sleeve 30, the protecting sleeve 30 may protect the snake bone 10, and may also achieve a smooth effect of the outer surface of the snake bone 10, avoid the contact of the snake bone 10 with the human body, and improve the safety of the operation to a certain extent. It can be appreciated that the camera module C may include an image sensor, and may further include a light compensating lamp, a lens, and other structural members for assisting in improving the camera effect.

In order to precisely control the bending motion of the snake bone 10, as shown in fig. 1B, a driving wire 50 (such as a wire rope) may be further disposed in the snake bone 10, wherein a distal end of the driving wire 50 is fixed relative to a distal end of the snake bone 10, and a proximal end of the driving wire 50 passes through the catheter 20 and is connected to a proximal driving device (not shown). Under the driving of the driving device, the driving wire 50 applies a pulling force to the distal end of the snake bone 10, so as to drive the snake bone 10 to bend, and change the position and the orientation of the front end 40.

In fig. 1B, there are shown cases where 4 driving wires 50 are arranged on the snake bone 10 in pairs opposite to each other with a space therebetween, and two driving wires 50 arranged opposite to each other in the radial direction form one set of driving wires, which respectively control deflection of the snake bone 10 in two degrees of freedom, for example, one set of driving wires realizes pitching of the snake bone 10 and the other set of driving wires realizes yawing of the snake bone 10, so that oscillation of the snake bone in any direction can be realized.

It will be appreciated that in other embodiments, only one set of drive wires may be provided within the snake bone 10, and only the snake bone 10 is controlled to oscillate in one degree of freedom.

In one embodiment, the surgical instrument further comprises an inner tube 60, the inner tube 60 is located in the snake bone 10, the distal end of the inner tube is fixed in the front end 40, the proximal end of the inner tube passes through the catheter 20 and is connected with the driving device, a containing space for the cable L of the camera module C to pass through is formed between the inner tube 60 and the snake bone 10 and between the inner tube 60 and the catheter 20, and meanwhile, the driving wire 50 can also be contained in the containing space. The inner tube 60 is configured to provide a passageway for an external instrument to be inserted into the body or to provide a passageway for irrigation fluid.

As shown in fig. 2, the embodiment of the present utility model provides a snake bone 10, wherein the snake bone 10 comprises a plurality of joints and a connecting beam 13, each joint is connected with each other in the axial direction of the snake bone 10, and two adjacent joints are integrally arranged through the connecting beam 13. For convenience of description, two adjacent joints will be hereinafter referred to as a first joint 1 and a second joint 2, respectively. Thus, the snake bone 10 can be integrally formed by adopting a laser processing mode, so that the processing technology is simplified, and the complex assembly structure and the assembly process are omitted.

In two adjacent joints, be equipped with first public articulated portion 11 on the first joint 1, be equipped with first female articulated portion 21 on the second joint 2, first public articulated portion 11 includes bellied first extrados 110, first female articulated portion 21 includes sunken first intrados 210, first public articulated portion 11 rotationally inlays in the first intrados 210 of first female articulated portion 21 through first extrados 110, tie-beam 13 sets up with first joint 1, the integrative of second joint 2, and first public articulated portion 11 is connected to the one end of tie-beam 13, first female articulated portion 21 is connected to the other end.

According to the embodiment, the two adjacent joints of the snake bone are matched with each other by the male hinge parts and the female hinge parts to realize rotational connection, and the two joints which rotate mutually are integrally connected at the rotational connection part of the joints through the connecting beam, so that the whole snake bone is integrally arranged; when the snake bones are not subjected to axial tension, the adjacent joints can restore to the coaxial state under the action of the connecting beam, so that the snake bones keep a natural straight state.

Because the connecting beam connects two adjacent joints into a whole, the snake bone can be formed in an integral cutting mode, compared with the assembled snake bone, the bending precision of the integral cutting type snake bone is higher, and the situation that the rotating shafts of joints at different positions are misplaced due to joint assembly defects or joint machining defects can be avoided. When the snake bone is manufactured in an integral cutting mode, tiny and smooth cuts exist on the opposite surfaces of the hinging parts of the adjacent joints, such as the first extrados and the first intrados, and the shapes of the two are high in wedge fit, so that the bending consistency of each part of the snake bone is good in the rotation process of the adjacent joints.

In one embodiment, the connecting beam 13 is parallel to the axial direction of the snake bone 10, and the first male hinge part 11 and the first female hinge part 21 can be symmetrically arranged about the connecting beam 13, so that stress uniformity of various parts of the snake bone 10 can be realized, and accurate control of bending action of the snake bone 10 is facilitated.

Referring to fig. 2, a first male hinge portion 11 is provided on a first joint 1 of a snake bone 10, a first female hinge portion 21 is provided on a second joint 2, two ends of a connecting beam 13 are respectively connected with the first male hinge portion 11 and the first female hinge portion 21, the joints of the snake bone 10 are only in running fit through a pair of male and female hinge portions, and in the process of relative rotation of the first joint 1 and the second joint 2 of the snake bone 10, a first extrados 110 swings in a first intrados 210.

As shown in fig. 3, in one embodiment, the first joint 1 of the two adjacent joints is further provided with a second female hinge portion 12, similar to the first female hinge portion 21, and the second female hinge portion 12 also includes a concave second intrados surface 120; correspondingly, the second joint 2 of the two adjacent joints is further provided with a second male hinge part 22 surrounding the connecting beam 13 therein, like the first male hinge part 11, the second male hinge part 22 also comprises a convex second outer cambered surface 220, the second outer cambered surface 220 is arranged concentrically with the first inner cambered surface 210, and also is arranged concentrically with the first outer cambered surface 110 and the second inner cambered surface 120, and the second male hinge part 22 is rotatably embedded in the second inner cambered surface 120 of the second female hinge part 12 through the second outer cambered surface 220.

So, same tie-beam 13 periphery both is equipped with first public articulated portion 11 and the female articulated portion 21 of first mutually supporting, be equipped with the public articulated portion 22 of second mutually supporting and the female articulated portion 12 of second again, at adjacent first joint 1, the relative rotatory in-process of second joint 2, two sets of articulated portions rotate around middle tie-beam 13, on the one hand, can make the atress face between each joint of snake bone 10 of this application bigger, normal running fit is more steady, on the other hand, when snake bone 10 receives axial pulling force or circumferential torsion, the cooperation of the public, female articulated portion of multiple can bear bigger force, also can protect the tie-beam 13 that locates wherein simultaneously.

Fig. 3 shows a case where the second female hinge portion 12 is provided at the outer periphery of the first male hinge portion 11, and the second male hinge portion 22 is provided at the outer periphery of the first female hinge portion 21, it will be appreciated that the second female hinge portion 12 may be provided at the inner side of the first male hinge portion 11, and the second male hinge portion 22 may be provided at the inner side of the first female hinge portion 21; in other embodiments, the number of male and female hinge parts on the periphery of the same connecting beam 13 at the same end of each joint may be more than one, for example, one joint is provided with 2 male hinge parts and 1 female hinge part, and the other joint rotationally matched with the one joint is provided with 2 female hinge parts and 1 male hinge part.

Illustratively, the inner surfaces of the first and second

male hinge parts

11 and 22 may have a C-shape or V-shape as long as the connection beam 13 is formed inside thereof to pass through to connect with the recess of the first female hinge part. In this way, the first male hinge part 11 and the first female hinge part 21 enclose a hollowed part 11H surrounding the connection beam 13 and penetrating the snake bone, the first male hinge part 11 has claw-shaped arms 111 respectively located at two sides of the connection beam 13, the outer surfaces of the claw-shaped arms 111 are first extrados surfaces 110, the free ends of the two claw-shaped arms 111 form an opening in the circumferential direction, the width of the opening is larger than that of the connection beam 13, so that a space is formed between the free ends of the claw-shaped arms 111 and the connection beam 13, and the opening allows the connection beam 13 to swing between the free ends of the two claw-shaped arms 111 in the process of rotating adjacent two joints. In one embodiment, the closer to the head end of the snake bone 10, the larger the opening of the first male hinge part 11 is, so that the joint of the head end of the snake bone 10 can have a larger swing amplitude.

In fig. 3, the second male hinge portion 22 is a C-shaped arm, and the C-shaped arm is sandwiched between the first male hinge portion 11 and the second female hinge portion 12, and the inner and outer cambered surfaces thereof are rotatably engaged with the first and second outer

cambered surfaces

110 and 120, respectively. Because the inner and outer cambered surfaces of the second male hinging part 22 are rotatably matched with the first outer cambered surface 110 and the second inner cambered surface 120, the torsion resistance and the stretching resistance of the joint where the second male hinging part 22 is positioned and the adjacent joint are better.

In one embodiment, the joint of the snake bone 10 may be provided with a through hole 100, the surgical apparatus may further include a threading buckle 70, the threading buckle 70 is provided with a threading hole 71 penetrating through, when the threading buckle 70 is installed in the through hole 100 from outside the joint, the threading buckle 70 may be clamped in the through hole 100, and the threading hole 71 is located in the snake bone 10, so that the driving wire 50 may be led out to the catheter 20 along each threading hole 71 in the snake bone 10, so as to realize the routing of the driving wire 50 in the snake bone 10. The through hole 100 can be cut and formed in the process of cutting the snake bone 10 to form each hinge part and the connecting beam 13, the manufacturing process is simple, and the driving wire 50 can be penetrated by installing the threading buckle 70 into the through hole 100 without increasing the diameters of the snake bone 10 and the surgical instrument.

It can be understood that fig. 2 and 3 in this embodiment disclose a case that 2 through holes 100 are formed in each joint of the snake bone 10, the through holes 100 on each joint are oppositely arranged in the radial direction, and the through holes 100 on two adjacent joints are arranged in a 90-degree dislocation manner, so that the limit of 4 driving wires 50 can be realized. In some embodiments, when only two driving wires are inserted into the snake bone 10, a pair of through holes 100 of two adjacent joints are arranged in line.

Illustratively, one end of the threading button 70 provided with the through hole 100 has a smaller size than the other end, so that the end of the threading button 70 where the through hole 100 is located can be clamped in the through hole 100 by means of the other end after being inserted into the threading hole 71. The threading button 70 can be trapezoid, cone-shaped or fan-shaped, and the shape of the through hole 100 can be matched with the threading button, so that the threading button is in a structure with large outside and small inside.

Referring to fig. 4, a snake bone 10 is shown which differs from that of fig. 2. The inner surface of at least one of the first male hinge part 11 and the first female hinge part 21 is provided with an arc-shaped concave part 101, and the connecting beam 13 is connected in the concave part 101 of the first male hinge part 11 and/or the first female hinge part 21.

Due to the presence of the intra-articular recess 101, the connecting beam 13 can extend longer, so that in joints of shorter length the connecting beam can also have a longer length, and the flexibility of the snake bone can also be ensured.

Illustratively, the depth of the respective male and female hinge-providing recesses 101 of the joint may be increased so that the connection beam 13 may be extended accordingly, further securing the length of the connection beam 13. As shown in fig. 5, taking the recess 101 of the first male hinge 11 as an example, the greater the depth of the recess 101, the longer the root of the connection beam 13 is at the recess 101, and the longer the total length of the connection beam 13 is.

In one embodiment, an arc-shaped chamfer 13S is formed between the concave portion 101 and the connecting beam 13, so that smooth transition from the connecting beam 13 to the concave portion 101 is realized, and breakage or damage caused by stress concentration at the joint of the concave portion 101 and the connecting beam 13 in the snake bone bending process is avoided.

As shown in fig. 6, both ends of the connection beam 13 are respectively connected to the concave portion 101 of the first female hinge portion 21 and the concave portion 101 of the first male hinge portion 11, so that both ends thereof can further extend to pass over the first intrados 210 of the first female hinge portion 21 and the first extrados 110 of the first male hinge portion 11, and the connection beam 13 is in transitional connection with the concave portion 101 surfaces of both ends through arc-shaped chamfers.

In one embodiment, the closer to the head end of the snake bone 10, the smaller the width of each connecting beam 13, so that the joint near the head end of the snake bone 10 is easier to bend, and the head end of the snake bone 10 is first bent in the process of controlling the bending of the snake bone 10 by the driving wire, so as to better meet the actual requirement, and therefore, the direction of the front end of the distal end of the snake bone can be accurately controlled.

In one embodiment, the closer to the head end of the snake bone 10, the longer each connecting beam 13. This arrangement also allows for better flexibility and easier bending of the head end of the snake bone 10. It can be understood that the effect of bending the head end of the snake bone 10 at first can be achieved by simultaneously carrying out differential design on the width and the length of the connecting beam 13 by combining the above ideas.

In one embodiment, the width of the head end of each connecting beam 13 near the snake bone is smaller than the width of the head end thereof remote from the snake bone. In this way, the effect of bending the distal end of the single connecting beam 13 earlier than the proximal end can be achieved. It will be appreciated that the design of the width of the individual connecting beams 13 may be combined with the differential design of the width and length of each connecting beam 13 described above to produce a serpentine structure with more continuous bending properties.

The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.

Claims

1. A snake bone, comprising:

2. The snake bone according to claim 1, wherein said connecting beams are axially parallel to said snake bone; and/or at least one of the first male hinge part and the first female hinge part is symmetrically disposed with respect to the connection beam.

3. The snake bone according to claim 1, wherein a second female hinge portion is further provided on the first of the two adjacent joints, the second female hinge portion comprising a concave second intrados;

4. A snake bone according to claim 3, wherein the second male hinge part is a C-arm which is sandwiched between the first male hinge part and the second female hinge part and has inner and outer curved surfaces rotatably engaged with the first and second inner curved surfaces, respectively.

5. The snake bone according to claim 1, wherein the inner surface of the first male hinge and/or the first female hinge is provided with a recess, and the connecting beam is connected in the recess of the first male hinge and/or the first female hinge.

6. The snake bone of claim 5, wherein the recess and the connecting beam form therebetween an arcuate chamfer.

7. The snake bone according to claim 1, wherein the first male hinge and the first female hinge enclose a hollowed-out portion surrounding the connecting beam and penetrating the snake bone.

8. The snake bone according to any of claims 1-7, wherein the width of each of said connecting beams is smaller and/or the length of each of said connecting beams is longer closer to the head end of said snake bone.

9. The snake bone according to any of claims 1-7, wherein the width of the connecting beam near the end of the snake bone is less than the width of the end thereof remote from the snake bone.

10. A surgical instrument comprising a snake bone according to any one of claims 1-9 and an imaging module provided at a head end of the snake bone.