Bent planer tool and system thereof

Abstract

The utility model relates to a bent planer tool and a system thereof, which belong to the technical field of medical instruments for orthopedics department, and comprise a holding part which is configured to be beneficial for an operator to operate and control the bent planer tool; the insertion part extends from the handle, the insertion part comprises an inner tube and an outer tube, the inner tube is movably arranged in the outer tube, and the insertion part is provided with a bent section; the outer pipe comprises a bent section and a linear section, and the bent section is a hard bent pipe or an adjustable soft bent pipe; the inner pipe comprises a bent section and a linear section, the bent section is a soft bent pipe, a braid layer is arranged outside the soft bent pipe, the inner pipe is connected with the torque transmission element / assembly, and the torque transmission element / assembly is connected and used for driving the inner pipe to rotate; the cutting part comprises an outer cutting tool bit and an inner cutting tool bit, the outer cutting tool bit is arranged at the far end of the outer tube, and the inner cutting tool bit is arranged at the far end of the inner tube. According to the curved planing tool, the angle of the planing tool can be flexibly adjusted in a narrow and complex operation environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to orthopedics medical instrument technical field, especially, a kind of curved planer and its system are more particularly related to. BACKGROUND

[0002] In the existing medical instrument field, especially in orthopedic surgery, planer is widely used in soft tissue cutting and shaping as a commonly used tool. However, with the increasing complexity and accuracy requirements of medical surgery, the traditional planer gradually exposes many shortcomings.

[0003] Firstly, the structure of traditional planer is fixed, and the cutter head part is straight rod, which makes it very difficult for doctors to operate when the surgical site is in a difficult-to-reach position during the operation. Especially in the case of dealing with complex anatomical structures, the traditional planer often cannot meet the surgical needs, resulting in doctors having to establish a larger channel, or even needing to cooperate with orthopedic grinding head to remove healthy bones to complete the operation. This not only reduces the operation efficiency, but also greatly increases the operation cost.

[0004] Currently, there are some planers with bending function, but the bending range of these planers is limited, and they cannot meet the operation requirements of multiple angles and directions. The existing planer design still cannot meet the clinical needs.

[0005] In order to solve the above problems, a curved planer is proposed. UTILITY MODEL CONTENTS

[0006] The purpose of the utility model is to provide a curved planer and its system, which improves the operation space and operation comfort of the planer.

[0007] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] A curved planer, comprising:

[0009] A holding part configured to facilitate the operator to operate and control the hand-held part of the curved planer;

[0010] An insertion part extending from the handle, the insertion part comprising an inner tube and an outer tube, the inner tube being movably arranged in the outer tube, and the insertion part being provided with a curved section;

[0011] The outer tube comprises a curved section and a straight section, and the curved section is a hard elbow or an adjustable soft elbow;

[0012] The inner tube comprises a curved section and a straight section, and the curved section is a soft elbow, and a braided layer is arranged outside the soft elbow; the inner tube is connected with a torque transmission element / assembly, and the torque transmission element / assembly is used to drive the rotation of the inner tube;

[0013] The cutting portion includes an outer cutting head and an inner cutting head, the outer cutting head is arranged at the distal end of the outer tube, and the inner cutting head is arranged at the distal end of the inner tube.

[0014] In another aspect, a curved planer system includes the curved planer described above, further including a power source for driving the planer, the power source is connected with the inner tube through the torque transmission element / assembly in the holding portion to provide the rotational power of the inner tube. Advantages

[0015] The curved planer has soft and hard curved structures, so that the angle of the planer can be flexibly adjusted in a narrow and complex surgical environment, thereby enhancing the flexibility and adaptability of operation, especially in the area of difficult-to-reach bone tissue, which can effectively improve the accuracy of the operation.

[0016] Through the design of the soft adjustable curved tube, the cutting range and angle can be accurately controlled during the operation as needed, avoiding large-scale cutting of healthy tissues, thereby effectively reducing the damage to the surrounding bones and soft tissues during the operation.

[0017] Due to the curved insertion portion, the planer can smoothly pass through complex bone structures or narrow surgical channels, reducing the dependence on larger surgical channels, thereby improving the utilization efficiency of the operation space.

[0018] The woven layer structure on the inner tube can improve the transmission stability of the hose and obtain higher rotational speed and torque.

[0019] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 It is a whole structure diagram of the embodiment of the present disclosure.

[0022] Figure 2 It is a double-bend whole structure diagram of the embodiment of the present disclosure.

[0023] Figure 3 It is an outer tube structure diagram of the embodiment of the present disclosure.

[0024] Figure 4 It is an inner tube structure diagram of the embodiment of the present disclosure.

[0025] Figure 5 Figure 1 is a structural diagram of a front end of an inner tube according to an embodiment of the present disclosure;

[0026] Figure 6 Figure 2 is a structural diagram of an outer cutter head according to an embodiment of the present disclosure;

[0027] Figure 7 Figure 3 is a structural diagram of a winding layer according to an embodiment of the present disclosure;

[0028] Figure 8 Figure 4 is a matching structural diagram of a cutter head according to an embodiment of the present disclosure;

[0029] Figure 9 Figure 5 is a structural diagram of a traction rope according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be apparently and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0031] It should be noted that the "far end" and "far side" mentioned in the present application can be understood as the end far away from the operator, and the "near end" and "near side" can be understood as the end close to the operator.

[0032] In one embodiment, as shown in Figures 1-2 The structure of the curved planer provided by the present application includes a holding part 5, an insertion part 1 and a cutting part.

[0033] The insertion part 1 includes an outer tube 11 and an inner tube 12, the inner tube 12 is movably installed in the outer tube 11, the outer tube 11 is fixedly arranged on the holding part 5, and the insertion part 1 is provided with a curved section.

[0034] The cutting part includes an outer cutting cutter head 113 and an inner cutting cutter head 123, the outer cutting cutter head 113 is arranged at the far end of the outer tube 11, and the inner cutting cutter head 123 is arranged at the far end of the inner tube 12.

[0035] In order to facilitate the user to operate the curved planer, the holding part 5 is provided for the user to easily hold, which not only provides a position for the user to hold and operate the curved planer, but also is internally provided with a structure for providing rotary power for the inner tube 12.

[0036] As shown in Figure 2As shown, the straight section of the outer tube 11 and the inner tube 12 is a stainless steel tube, and the curved section of the outer tube 11 can be a hard elbow or an adjustable soft elbow; the inner tube is connected with a torque transmission element / assembly for driving the rotation of the inner tube; the torque transmission element / assembly can be driven by a motor.

[0037] In the structure shown in the figure, the hard elbow is integrated with the outer tube 11, and the curved section is formed by bending the outer tube 11. This structure has the advantages of high strength and good support, which can ensure the strength of the curved section of the outer tube, and has the simple structure and convenient processing. However, this structure cannot be adjusted, which will increase the size of the surgical channel, and cannot be adjusted in real time under the endoscope to adapt to different positions.

[0038] In the structure shown in the figure, the hard elbow is integrated with the outer tube 11, and the curved section is formed by bending the outer tube 11. This structure has the advantages of high strength and good support, which can ensure the strength of the curved section of the outer tube, and has the simple structure and convenient processing. However, this structure cannot be adjusted, which will increase the size of the surgical channel, and cannot be adjusted in real time under the endoscope to adapt to different positions.

[0039] In some embodiments, the adjustable soft elbow structure can be as shown in the figure. Figure 3 As shown, the outer soft elbow 112 has a circular tube structure, and the two sides are uniformly provided with spring grooves 1121 that are staggered with each other. The spring grooves 1121 are V-shaped, and the openings are outward. The spring grooves 1121 are arranged on both sides of the outer soft elbow 112 in the direction of bending. The soft elbow is made of spring steel to ensure elasticity and rigidity. Further, the distal end of the soft elbow 112 is provided with a knife head positioning groove 1122 for installing and positioning the outer cutting knife head 113. The outer cutting knife head 113 is provided with a knife head positioning boss 1131 that cooperates with the knife head positioning groove 1122.

[0040] The outer soft elbow 112 is provided with a traction rope threading hole 1123, and the traction rope threading hole 1123 is provided with a traction rope 2. The distal end of the traction rope 2 is fixed to the distal end of the outer cutting knife head 113 or the outer soft elbow 112. The proximal end of the traction rope 2 is arranged on the adjusting mechanism of the holding part 5. This design can complete the angle adjustment under the endoscope.

[0041] The part of the adjusting mechanism connected with the proximal end of the traction rope 2 can pull and tension the traction rope 2. The adjusting mechanism can be driven by sliding, rotating, etc. The control method of the existing snake bone adjusting handle can be used.

[0042] The inner tube 12 includes a soft tube section and a hard tube section. The soft tube section is arranged at the bending section position of the insertion part 1, and the soft tube section and the hard tube section are connected by pressure welding or welding. The soft tube section can be made of spring, cutting hose, etc. Based on the torque transmission and high-speed stability, a soft tube is proposed in this application. Figure 4As shown, in some embodiments, the inner tube 12 is sequentially provided with a hard tube segment 121, an inner hose segment 122, and an inner cutting head 123 from the proximal end to the distal end; the inner hose segment 122 includes a plurality of inner hose intermediate parts 1221 and a distal end connector 1223 and a proximal end connector 1222 respectively arranged at both ends of the inner hose segment 122, the inner hose intermediate parts 1221 are connected end to end, and the inner hose intermediate parts 1221 are in the shape of a whole circular ring.

[0043] The connection mode of the inner hose intermediate part 1221 is as shown in Figure 7 As shown, the distal end of the inner hose intermediate part 1221 is provided with two distal end connection grooves 1229 distributed in a circle, the distal end connection grooves 1229 are provided with a distal end fixing boss 1228, the distal end of the distal end fixing boss 1228 is in the shape of a circle, and the connection part between the distal end fixing boss 1228 and the inner hose intermediate part 1221 is in the shape of a trapezoid gradually increasing from the distal end to the proximal end.

[0044] The proximal end of the inner hose intermediate part 1221 is provided with a proximal end connection boss 1225 matched with the distal end connection groove 1229, the proximal end connection boss 1225 is arranged in the distal end connection groove 1229, the proximal end connection boss 1225 and the distal end connection groove 1229 are provided with an installation gap for giving way when bending, the distal end connection groove 1229 is provided with a proximal end connection groove 1226 matched with the distal end fixing boss 1228, and the distal end fixing boss 1228 is arranged in the proximal end connection groove 1226; the proximal end connection boss 1225 is provided with an outer anti-falling boss 1227;

[0045] The distal end connector 1223 and the proximal end connector 1222 are connected with the inner hose intermediate part 1221 through the same connection structure as that of the inner hose intermediate part 1221; the side of the inner hose intermediate part 1221, the distal end connector 1223, and the proximal end connector 1222 close to each other is provided with a bending giving way groove on both sides of the connection structure to ensure that the inner hose segment 122 will not interfere when bending.

[0046] In some embodiments, the outer side of the inner hose segment 122 is provided with a winding layer;

[0047] Further, the winding layer is composed of a plurality of stainless steel braided flexible shafts 3, the winding direction of which is determined according to the rotation direction of the inner tube 12, and the winding layer is tightened along with the rotation of the inner tube 12, so that the torque can be transmitted through the winding layer, and the stability of the inner hose segment 122 is ensured. As shown in Figure 7 As shown, a plurality of flexible shaft mounting grooves 1230 can be arranged on the outer side of the inner hose segment 122 when arranged; the arrangement can ensure the stability of the mounting of the stainless steel braided flexible shaft 3, the stainless steel braided flexible shaft 3 adopts a structure of multiple winding and weaving without a mandrel, and the spiral directions of adjacent two layers of weaving are opposite.

[0048] In some embodiments, as shown in Figure 4As shown, the winding layer can be tightly wound with multiple strands of stainless steel soft wire, and the winding direction is determined by the rotating direction of the inner tube 12, which tightens with the rotating inner tube 12, thus ensuring the firmness and stability of the inner hose section 122 components, and the outermost winding layer can play a role in transmitting torque.

[0049] In some embodiments, the inner cutting head 123 is provided with multiple inner protruding cutting edges 1231 for cutting, and the outer cutting head 113 is provided with multiple outer protruding cutting edges 1231 for cutting, thus avoiding the blockage of the channel caused by the excessive cutting of soft tissue.

[0050] Since the outer soft elbow pipe 112 needs to have greater rigidity to ensure its stability during operation, in this case, it is difficult to ensure the safety margin under this tension force using a traditional single control traction rope of the snake bone, and in the case of multiple traction ropes working simultaneously, due to the consistency of the force direction, the existing adjusting handle is driven by a rigid moving part, which is difficult to ensure that each traction rope is evenly stressed; in some embodiments, the inner side of the outer soft elbow pipe 112 is provided with two traction rope threading holes 1123 when it is bent,

[0051] The outer cutting head 113 or the distal end of the outer soft elbow pipe 112 is provided with a U-shaped through hole for installing the traction rope 2, which is provided with two outlets at both ends, respectively, penetrating the surface, forming a through hole structure with a U-shaped path, and the traction rope 2 passes through the U-shaped through hole and then passes through the traction rope threading hole 1123 in turn, and is connected with the adjusting mechanism of the holding part 5. The traction rope 2 can slide in the U-shaped through hole to ensure that the two traction ropes 2 are evenly stressed.

[0052] In some specific embodiments, the U-shaped through hole is arranged on the outer cutting head 113, as shown in Figure 6 As shown, the outer cutting head 113 is provided with a U-shaped suture mounting hole 1132, and the two ends of the U-shaped suture mounting hole 1132 are provided with threading holes 1133. This design can facilitate installation and make the stress point close to the distal end for easy adjustment.

[0053] As shown in Figure 9 The traction rope 2 can be divided into a movable section 21 arranged in the U-shaped through hole, and the two sections of the traction rope 2 are provided with fixed ends 25 connected with the adjusting mechanism of the holding part 5, the threading section 22 near the end of the movable section 21 is arranged in the threading hole 1133, and the threading section 22 and the fixed end 25 are provided with a connecting section 23, the connecting section 23 is provided with a protective sleeve 24 outside, the protective sleeve 24 is arranged outside the outer tube 11, further, the outer tube 11 is provided with a groove for installing the protective sleeve 24, the protective sleeve 24 is a stainless steel tube, and the traction rope 2 is a high-strength metal wire, which can be a stainless steel wire or a nickel-titanium wire.

[0054] Because the strength of the soft shaft is lower than that of the rigid shaft, in order to avoid the falling and breaking of the inner cutter head, and more importantly, the length and position of the soft tube need to match the bending angle and radius of the outer tube, so as to avoid the failure and damage of the soft bending tube 112 during high-speed rotation. Based on this, in some embodiments, as shown in Figure 8 The outer cutting cutter head 113 is provided with a fixed buckle installation groove 1135, the inner cutting cutter head 123 is provided with an annular fixed groove 1233 at the proximal end portion 1232, and the fixed buckle installation groove 1135 is provided with a fixed buckle 4. The fixed buckle 4 includes an arc-shaped main body end 41, and the two sides of the arc-shaped main body end 41 are provided with fixed pin ends 42 which are matched with the annular fixed groove 1233. At the same time, such design can avoid the stability of the cutter head and ensure that there is no secondary damage. At the same time, the soft bending tube 112 and the bending position are fixed to ensure the best combination.

[0055] In one embodiment, as shown in Figure 2 The bending planer adopts a double-bending structure design, which provides more flexible operation angles and ranges. The outer tube 11 and the inner tube 12 are both provided with corresponding double-bending structures;

[0056] The bending section of the outer tube 11 can be a combination of a fixed bending tube section and an adjustable soft bending tube section. The fixed bending tube section is located at one end close to the holding part, ensuring that the planer has sufficient rigidity and support force at the basic angle. The adjustable soft bending tube section is located at the distal end, allowing the operator to adjust through the handle during the operation to realize multi-angle and multi-directional operation; the design of the inner tube 12 matches that of the outer tube 11, and the bending section thereof is composed of a soft tube section.

[0057] Further, as shown in Figure 2 The outer tube of the distal bending 100 adopts a bendable spring soft tube, and the proximal bending 200 adopts a rigid tube bending.

[0058] The bending planer in the above embodiment is also provided with a traction adjustment mechanism for controlling the bending angle of the adjustable distal bending 100. The mechanism is connected with the traction rope 2 through the rotation or sliding adjustment device on the holding part 5. One end of the traction rope 2 is fixed at the distal end of the outer cutting cutter head 113 or the outer soft bending tube 112, and the other end is connected with the adjustment device. The traction rope passes through the U-shaped through hole 1123 from the bending section of the outer tube, realizing the uniformity of stress during double-bending operation.

[0059] The curved planer cutter of the double-bending structure can adapt to complex surgical environments under the operation of the inner and outer tube double-bending, especially in narrow or difficult-to-access surgical areas, significantly improving the flexibility and accuracy of the surgery. The combination of the double-bending structure and the adjusting mechanism makes the planer cutter system more stable and flexible during intraoperative operation, while the adjustable mirror-under bending angle at the distal end can improve the operation space and comfort, reduce the dependence of the surgeon on the surgical channel, and avoid damage to healthy bone tissue, thereby improving the efficiency and safety of the surgery.

[0060] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The preferred embodiments of the above disclosed application are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A curved planer, characterized in that, include: The grip is configured to facilitate the operator's handling and control of the curved planer. An insertion portion extending from the gripping portion includes an inner tube and an outer tube, with the inner tube movably disposed within the outer tube, and the insertion portion having a curved section. The outer tube includes a curved section and a straight section, wherein the curved section is a rigid bend or an adjustable flexible bend. The inner tube includes a curved section and a straight section. The curved section is a flexible bend with a winding layer on the outside. The inner tube is connected to a torque transmission element / assembly, which is used to drive the inner tube to rotate. The cutting section includes an outer cutting head and an inner cutting head, wherein the outer cutting head is located at the far end of the outer tube and the inner cutting head is located at the far end of the inner tube.

2. The bending planer according to claim 1, characterized in that, The insertion section has two curved sections in opposite directions.

3. The bending planer according to claim 1 or 2, characterized in that, The curved section of the outer tube near the cutting part is an adjustable soft bend. The flexible bend has a cylindrical structure with staggered spring grooves evenly distributed on both sides. The spring grooves are V-shaped with their openings facing outwards and are located on both sides of the flexible bend in the direction that needs to be bent. The outer flexible bend is provided with a traction rope threading hole, and a traction rope is provided in the traction rope threading hole. The distal end of the traction rope is fixed to the distal end of the outer cutting head or the outer flexible bend, and the proximal end of the traction rope is connected to the adjustment mechanism of the grip.

4. The bending planer according to claim 1 or 2, characterized in that, The curved section of the inner tube is an inner flexible tube section, which includes multiple inner flexible tube intermediate components and distal and proximal connectors respectively disposed at both ends of the inner flexible tube section. The middle component of the inner hose is in the shape of a ring and connected end to end. Two distal connecting grooves are provided at the distal end of the middle component of the inner hose. A distal fixing boss is provided in the distal connecting groove. The distal end of the distal fixing boss is circular, and the part connected to the middle component of the inner hose is a trapezoid that gradually increases in size from the distal end to the proximal end. The proximal end of the intermediate component of the inner hose is provided with a proximal connecting boss that mates with the distal connecting groove. The proximal connecting boss is located in the distal connecting groove and has an installation gap with the distal connecting groove to allow for bending. The distal connecting groove is provided with a proximal connecting groove that mates with the distal fixing boss. The distal fixing boss is located in the proximal connecting groove and has an external anti-detachment boss on the proximal connecting boss. The distal connector and the proximal connector are connected to the inner hose intermediate component via the same connection structure as the inner hose intermediate component. The inner hose intermediate component, distal connector, and proximal connector are all provided with bending relief grooves on the sides that are close to each other.

5. The bending planer according to claim 1 or 2, characterized in that, The winding layer is composed of multiple stainless steel braided flexible shafts, and the winding direction is determined according to the rotation direction of the inner tube, and it tightens as the inner tube rotates.

6. The bending planer according to claim 1 or 2, characterized in that, The winding layer can be made of multiple strands of stainless steel wire tightly wound together, and its winding direction is determined according to the rotation direction of the inner tube, and it tightens as the inner tube rotates.

7. The bending planer according to claim 1 or 2, characterized in that, The inner cutting head is provided with multiple inner protruding cutting blades for cutting, and the outer cutting head is provided with multiple outer protruding cutting blades for cutting.

8. The bending planer according to claim 1 or 2, characterized in that, The distal end of the outer cutting head or the outer soft bend is provided with a U-shaped through hole for installing a traction rope. The through hole has two outlets at each end, forming a through hole structure with a U-shaped path. After the traction rope passes through the U-shaped through hole, the two ends pass through the traction rope threading hole in sequence and are connected to the adjustment mechanism of the grip part.

9. The bending planer according to claim 3, characterized in that, The traction rope is provided with a protective sleeve, which is located on the outside of the outer tube.

10. A bending planer system, characterized in that, The tool includes a bending planer according to any one of claims 1-9, and further includes a power source for driving the planer, the power source being connected to the inner tube via a torque transmission element / assembly within the grip to provide rotational power to the inner tube.

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