Locking buckle

Abstract

The utility model discloses a locking buckle which comprises a locking inner core, a locking outer sleeve and an abutting piece, the locking inner core is provided with a first end portion, a second end portion and a first through hole penetrating through the first end portion and the second end portion, two opposite second side faces of the locking inner core are respectively provided with an open groove, and the first end portion of the locking inner core is divided into two independent free portions. The locking outer sleeve is provided with a second through hole penetrating in the axial direction, and the locking outer sleeve can be arranged on the outer side of the locking inner core in a sleeving mode. And a stopping piece is arranged between the free part and the inner wall of the second through hole. In the process that the locking outer sleeve is sleeved into the locking inner core from the second end part to the first end part, the locking outer sleeve can abut against the abutting piece, so that the two free parts are close to each other until the cable in the first through hole is extruded and locked, the cable is prevented from loosening, and pre-pressurization is realized. Meanwhile, the locking buckle is vertically implanted, the wound of a patient is small, minimally invasive operation is facilitated, the cable can be located in the open groove, and the defects that stress is concentrated and the cable is easy to cut during vertical implantation are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a locking buckle. BACKGROUND

[0002] In the fracture operation, usually use the cerclage technique to help the skeleton fixed or repair, after the titanium cable or other cable is around the fractured bone, passes through the locking buckle, then uses the clamp to clamp the locking buckle, makes the titanium cable tightly fixed and does not come loose. However, before clamping the locking buckle, the titanium cable is easy to relax, causes the reduction loss, often needs the doctor to manually pull the titanium cable, installs / operates the instrument to press the titanium cable, and the operation is complex, and the operation effect is unstable. Meanwhile, the locking buckle used in the market usually needs to be placed horizontally, which requires a large enough incision to allow the insertion and use of the locking buckle and the titanium cable clamping tool, which is not conducive in minimally invasive surgery. Therefore, a pre-pressurized locking buckle that can be placed vertically during surgery is needed to solve the above problems. SUMMARY

[0003] The utility model aims at providing a locking buckle to solve the problems in the above background.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A locking buckle for fixing a cable passing through it, comprising:

[0006] A locking inner core having a first end and a second end, and a first through hole passing through the first end and the second end, the two opposite ends of the cable can pass out from the second end through the first through hole, the locking inner core has two opposite first sides and two opposite second sides, and a slot is provided on each of the two second sides, the slot extends along the axial direction of the locking inner core from the first end to divide the locking inner core at the first end into two independent free parts, and the cable can be located in the slot;

[0007] A locking outer sleeve provided with an axially passing second through hole, the locking outer sleeve can be sleeved on the outside of the locking inner core;

[0008] A stopper provided between the free part and the inner wall of the second through hole, during the process of sleeving the locking outer sleeve on the locking inner core from the second end to the first end, the locking outer sleeve can press the stopper to make the two free parts close to each other until the cable in the first through hole is squeezed and locked.

[0009] The utility model discloses a locking buckle, set up the locking buckle as including locking inner core, locking outer cover and the stop piece between locking inner core and locking outer cover, for a double -layer locking buckle, in the process of locking outer cover from the second end portion to the first end portion direction cover into the tight inner core, locking outer cover can press the stop piece, make two the free department close to each other, until extrude the cable in the first through -hole, prevent cable to slip, realize pre -pressurization, so that the doctor can leave the place of suffering and carry out the operation such as installation and tightening instrument, and will not cause the fracture reduction loss, reduce the operation time, optimize the operation process.

[0010] The utility model discloses a locking buckle, set up the locking buckle as including locking inner core, locking outer cover and the stop piece between locking inner core and locking outer cover, for a double -layer locking buckle, in the process of locking outer cover from the second end portion to the first end portion direction cover into the tight inner core, locking outer cover can press the stop piece, make two the free department close to each other, until extrude the cable in the first through -hole, prevent cable to slip, realize pre -pressurization, so that the doctor can leave the place of suffering and carry out the operation such as installation and tightening instrument, and will not cause the fracture reduction loss, reduce the operation time, optimize the operation process.

[0011] Optionally, the stop piece is a protrusion, which is arranged on the free portion, or the protrusion is arranged on the inner wall of the second through hole.

[0012] Optionally, the protrusion is wedge-shaped, and the height of one end of the protrusion close to the first end portion is higher than the height of the other end of the protrusion away from the first end portion.

[0013] Optionally, the side of the protrusion in contact with the inner wall of the locking outer cover or the free portion is a smooth surface, so that the locking inner core and the locking outer cover can adjust the unlocking and locking states to re-adjust the position of the cable.

[0014] Optionally, the length of the protrusion extending along the axial direction of the locking inner core is shorter than the length of the first side surface.

[0015] Optionally, the length of the protrusion extending along the axial direction of the locking inner core is shorter than the length of the first side surface.

[0016] Optionally, the length of the protrusion is not more than the length of the groove.

[0017] Optionally, the groove is U-shaped, including an arc-shaped first groove wall and two opposite linear second groove walls.

[0018] Optionally, the cross section of the locking inner core is oblong, the width direction of the first side surface is parallel to the long axis direction of the oblong, and the width direction of the second side surface is parallel to the short axis direction of the oblong.

[0019] Optionally, the locking sleeve is provided with a cutting concave surface for clamping the cable and the locking inner core, and a side surface where the cutting concave surface is located cooperates with the first side surface.

[0020] In conclusion, the technical effects and advantages of the utility model are as follows: the locking inner core and the locking sleeve are implanted together in the operation, and are implanted into the to-be-repaired bone to push the locking sleeve forward to cooperate with the locking inner core to generate a pre-locking force, so as to prevent the cable from loosening and sliding, and facilitate the doctor to clamp the locking sleeve and the locking inner core by using a conventional clamping forceps; the locking buckle is implanted vertically, so that the minimally invasive surgery is facilitated, and the wound of the patient is small. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0022] Figure 1 It is a structural schematic view of the locking buckle in an embodiment of the utility model;

[0023] Figure 2 It is a half sectional view of the locking buckle in an embodiment of the utility model;

[0024] Figure 3 It is a structural schematic view of the locking inner core in an embodiment of the utility model;

[0025] Figure 4 It is a right view of the locking inner core in an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic view of the locking sleeve in an embodiment of the utility model;

[0027] Figure 6 It is a use schematic view of the locking buckle in an embodiment of the utility model.

[0028] Among them:

[0029] 01, cable; 02, to-be-repaired bone; 1, locking inner core; 11, first end part; 12, second end part; 13, first through hole; 14, first side surface; 15, second side surface; 16, slot; 17, free part; 2, locking sleeve; 21, second through hole; 22, cutting concave surface; 3, protruding block. DETAILED DESCRIPTION

[0030] Clearly and completely describe the technical scheme in the embodiments of the utility model with the drawings in the embodiments of the utility model below, apparently, the described embodiments only are a part of embodiments of the utility model, and not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0031] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0034] The existing locking buckle is prone to reset loss during use, or needs a doctor to manually hold the titanium cable while installing or operating the instrument, the operation is complex, the operation time is long, and the locking buckle is placed horizontally, so the surgical incision is large. Therefore, the embodiment provides a locking buckle for fixing the cable passing through it, such as Figures 1-6As shown, the locking buckle includes a locking inner core 1, a locking outer sleeve 2, and a stop member. The locking inner core 1 has a first end 11 and a second end 12, and a first through hole 13 penetrating the first end 11 and the second end 12. The two opposite ends of the cable 01 can pass through the first through hole 13 and exit from the second end 12. The locking inner core 1 has two opposite first side surfaces 14 and two opposite second side surfaces 15. The two second side surfaces 15 are respectively provided with slots 16. The slots 16 extend axially from the first end 11 along the locking inner core 1 to divide the locking inner core 1 into two independent free parts 17 at the first end 11. The cable 01 can be located in the slots 16. The locking outer sleeve 2 is provided with a second through hole 21 that penetrates axially. The locking outer sleeve 2 can be fitted onto the outside of the locking inner core 1. A stopper is provided between the free part 17 of the locking inner core 1 and the inner wall of the second through hole 21. During the process of the locking outer sleeve 2 being inserted into the locking inner core 1 from the second end 12 to the first end 11, the locking outer sleeve 2 can press against the stopper, so that the two free parts 17 are close to each other until the cable 01 in the locking first through hole 13 is squeezed.

[0035] In this embodiment, the locking outer sleeve 2 is fitted on the outside of the locking inner core 1. A stop member 3 is provided between the free part 17 of the locking inner core 1 and the inner wall of the second through hole 21 of the locking outer sleeve 2. When the locking outer sleeve 2 is fitted into the locking inner core 1 along its axial direction, the inner wall of the locking outer sleeve 2 presses against the stop member. Due to the presence of the slot 16 on the second side 15 of the locking inner core 1, the side of the locking inner core 1 with the slot 16 will tighten, causing the two free parts 17 to move closer to each other, thereby squeezing the cable 01 in the first through hole 13, achieving the effect of pre-pressurizing the cable 01, so that the doctor can leave the affected area to install the tightening instrument without causing the fracture reduction to be lost, reducing the operation time and optimizing the operation process.

[0036] In this embodiment, cable 01 can be a titanium cable.

[0037] In this embodiment, as Figure 6 As shown, the locking buckle is a new vertical implantation method, where the locking buckle is placed vertically on the surface of the bone 02 to be repaired. The first end 11 of the locking inner core 1 is close to the bone 02 to be repaired, and the cable 01 wraps around the bone 02 and is then stored inside the locking inner core 1. Because the bending angle of the cable 01 at the contact surface between the locking inner core 1 and the bone 02 to be repaired is small during vertical implantation, the stress concentration is high, and the cable 01 is prone to breakage when cut by the locking inner core 1. However, in this embodiment, the locking inner core 1 has a slotted structure 16, allowing part of the cable 01 to enter the slotted structure 16, increasing the bending angle of the cable 01 at the contact surface with the bone 02 to be repaired. Furthermore, since there is no metal on the side, the cable 01 cannot be cut, thus avoiding the drawbacks of vertical implantation.

[0038] Optionally, the abutting member is a protrusion 3, which is arranged on the free portion 17, or the protrusion 3 is arranged on the inner wall of the second through hole 21. The abutting member can also be other separate components, such as a wedge, a bolt, etc., which can be inserted between the locking inner core 1 and the locking outer sleeve 2 to abut against the locking inner core 1. In the embodiment, as shown in Figure 3 and Figure 4 the protrusion 3 is arranged on the free portion 17 of the locking inner core 1, and the protrusion 3 can abut against the locking inner core 1 when being pressed, so as to make the two free portions 17 close to each other, thereby achieving the purpose of pressing the cable 01 in the first through hole 13. In other embodiments, the protrusion 3 can be arranged on the inner wall of the second through hole 21.

[0039] In the embodiment, the protrusion 3 is wedge-shaped, and the height of one end of the protrusion 3 close to the first end portion 11 is higher than the height of the other end of the protrusion 3 away from the first end portion 11. This arrangement facilitates the movement of the locking outer sleeve 2 on the outer surface of the locking inner core 1, so that the protrusion 3 gradually presses the two free portions 17 to make them close to each other, thereby achieving the pre-clamping of the cable 01 by the free portions 17 of the locking inner core 1 before the locking outer sleeve 2 is completely sleeved on the locking inner core 1. In other embodiments, the protrusion 3 can also be in any shape, such as semispherical, tooth-shaped, arc-shaped, etc.

[0040] Optionally, the side of the protrusion 3 in contact with the inner wall of the locking outer sleeve 2 or the free portion 17 is smooth, so that the locking inner core 1 and the locking outer sleeve 2 can be adjusted to the unlocked and locked states, thereby re-adjusting the position of the cable 01. In the embodiment, the protrusion 3 is arranged on the free portion 17 of the locking inner core 1, and the inner wall of the locking outer sleeve 2 and the upper surface of the protrusion 3 in contact with the inner wall of the locking outer sleeve 2 are smooth, which facilitates the sleeving of the locking outer sleeve 2 on the locking inner core 1 or the unlocking of the locking outer sleeve 2 from the locking inner core 1, so as to re-adjust the position of the cable 01.

[0041] Optionally, the length of the protrusion 3 extending along the axial direction of the locking inner core 1 is shorter than the length of the first side surface 14. In the embodiment, as shown in Figure 3 the length of the protrusion 3 extending along the first side surface 14 accounts for about 1 / 4-1 / 2 of the total length of the first side surface 14, which facilitates the connection of the locking inner core 1 and the locking outer sleeve 2.

[0042] Optionally, the slot 16 is in communication with the first through hole 13, and the length of the slot 16 extending along the axial direction of the locking inner core 1 is shorter than the length of the second side surface 15. In the embodiment, the length of the slot 16 accounts for 1 / 4-2 / 3 of the total length of the second side surface 15, which divides the locking inner core 1 at the first end 11 into two independent free portions 17. During the process of sleeving the locking outer sleeve 2 into the locking inner core 1, the locking inner core 1 with one side of the slot 16 is tightened, so that the two free portions 17 are close to each other, thereby extruding the cable 01 in the first through hole 13. Meanwhile, the slot 16 is in communication with the first through hole 13, so that the cable 01 in the first through hole 13 can enter the slot 16.

[0043] Optionally, the length of the protrusion 3 is not more than the length of the slot 16, which facilitates the deformation of the free portion 17. In the embodiment, the length of the protrusion 3 is shorter than the length of the slot 16, and in other embodiments, the length of the protrusion 3 can be equal to the length of the slot 16. Optionally, the width of the protrusion 3 is not more than the width of the first side surface 14, and the width of the protrusion 3 accounts for 1 / 2-1 of the total width of the first side surface 14. The height of the protrusion 3 can be designed in different sizes, and the greater the height of the protrusion 3, the greater the pre-tightening force, and vice versa. Different specifications of the protrusion 3 can be designed to cope with different surgical situations.

[0044] In the embodiment, as shown in Figure 2 and Figure 3 , the slot 16 is in the shape of U, including an arc-shaped first slot wall and two opposite linear second slot walls.

[0045] In the embodiment, as shown in Figure 4 , the cross section of the locking inner core 1 is in the shape of an oblong, the width direction of the first side surface 14 is parallel to the major axis direction of the oblong, and the width direction of the second side surface 15 is parallel to the minor axis direction of the oblong. The slot 16 is arranged in the minor axis direction of the locking inner core 1, which facilitates the mutual approach of the free portions 17.

[0046] Optionally, the first through hole 13 of the locking inner core 1 is in the shape of an oblong hole, and the two end portions of the cable 01 are received in the first through hole 13 after being wound around the bone 02 to be repaired, and are located at the short sides of the oblong first through hole 13, respectively, and the cable 01 can enter the slot 16.

[0047] Optionally, the second through hole 21 of the locking outer sleeve 2 is in the shape of an oblong hole, which is adapted to the cross-sectional shape of the locking inner core 1.

[0048] Optionally, the cross-sectional shape of the locking outer sleeve 2 is not limited, which can be in the shape of an oblong, an ellipse, a rectangle, a square, etc.

[0049] In the embodiment, as shown in Figure 5As shown, the locking sleeve 2 is provided with a cutting concave surface 22 for clamping the cable 01 and the locking inner core 1, and the side surface where the cutting concave surface 22 is located cooperates with the first side surface 14. After the locking sleeve 2 is pushed to the appropriate position, the cutting concave surface 22 of the locking sleeve 2 is clamped by using a conventional clamping forceps, and the operation is completed.

[0050] In summary, the locking inner core of the embodiment is implanted together with the locking sleeve during the operation, and is implanted at the bone to be repaired to push the locking sleeve forward to cooperate with the locking inner core to generate a pre-locking force, prevent the cable from loosening and sliding, and make the fracture reduction not easy to lose. Then, the conventional clamping forceps is used to clamp the locking sleeve and the locking inner core, and the doctor can leave the affected area to install the tightening device, reduce the operation time, and optimize the operation process. The locking buckle of the embodiment is implanted in a vertical manner, the wound of the patient is small, and the minimally invasive operation is facilitated. If the existing locking inner core is used in the vertical implantation operation mode, the cable bending angle is small, the stress is concentrated, and the cable is easily cut. The locking inner core of the embodiment is slotted on the side surface, which can effectively avoid the above-mentioned disadvantages.

[0051] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement is carried out to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A locking buckle for securing a cable passing through it, characterized in that, include: The locking inner core has a first end and a second end, and a first through hole penetrating the first end and the second end. The two opposite ends of the cable can pass through the first through hole and exit from the second end. The locking inner core has two opposite first sides and two opposite second sides. The two second sides are respectively provided with slots. The slots extend from the first end along the axial direction of the locking inner core to divide the locking inner core into two independent free parts at the first end. The cable can be located in the slots. The locking sleeve has a second through hole extending axially, and the locking sleeve can be fitted onto the outside of the locking inner core; A stopper is provided between the free portion and the inner wall of the second through hole. During the process of the locking sleeve being inserted into the locking inner core from the second end to the first end, the locking sleeve can press against the stopper, so that the two free portions are brought closer to each other until the cable in the first through hole is squeezed and locked.

2. The locking buckle according to claim 1, characterized in that, The stop member is a protrusion, which is disposed on the free part, or the protrusion is disposed on the inner wall of the second through hole.

3. The locking buckle according to claim 2, characterized in that, The bump is wedge-shaped, and the height of the end of the bump closer to the first end is higher than the height of the end of the bump farther from the first end.

4. The locking buckle according to claim 2, characterized in that, The side of the protrusion that contacts the inner wall of the locking sleeve or the free part is a smooth surface, so that the locking inner core and the locking sleeve can be adjusted to unlock and lock states in order to readjust the position of the cable.

5. The locking buckle according to claim 2, characterized in that, The length of the protrusion extending axially along the locking inner core is shorter than the length of the first side.

6. The locking buckle according to claim 1, characterized in that, The slot communicates with the first through hole, and the length of the slot extending axially along the locking inner core is shorter than the length of the second side.

7. The locking buckle according to claim 5, characterized in that, The length of the bump does not exceed the length of the slot.

8. The locking buckle according to claim 1, characterized in that, The slot is U-shaped, comprising an arc-shaped first slot wall and two opposing straight second slot walls.

9. The locking buckle according to claim 1, characterized in that, The locking inner core has an elongated oval cross-section, with the width direction of the first side parallel to the major axis of the elongated oval, and the width direction of the second side parallel to the minor axis of the elongated oval.

10. The locking buckle according to claim 1, characterized in that, The locking outer sleeve has a cutting concave surface for clamping the cable and the locking inner core, and the side where the cutting concave surface is located cooperates with the first side surface.

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