Orthopedic cage holding tool

Abstract

The application relates to a kind of orthopedic fusion cage holding tools, including sleeve, locking rod and handle, locking rod is installed in sleeve, and the front end of locking rod is provided with clamping head outside sleeve;Handle is installed at the rear end of sleeve, and locking mechanism connected with the rear end of locking rod is arranged in handle;Locking mechanism can drive locking rod to move axially in sleeve, so that clamping head clamps or loosens.The application can realize the quick locking and loosening of clamping head, and is easy and simple to operate, stable in locking state, avoids the problem that fusion cage is difficult to implant or hold and take off, reduces the operation difficulty and risk of surgery.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of orthopedic medical devices, and particularly relates to a holding tool for an orthopedic fusion cage. BACKGROUND

[0002] At present, the holding tools for fusion cages used in clinical practice are mostly connected by threads or locked by nuts. Such a structure of the holding tool is not only unstable in locking, but also has a high risk of being difficult to implant or falling off during the operation, and increases the difficulty of the operation and prolongs the operation time, which may lead to the failure of the operation. SUMMARY

[0003] The purpose of the present application is to provide a holding tool for an orthopedic fusion cage to solve the problem of complex clamping process of the fusion cage.

[0004] The holding tool for an orthopedic fusion cage is achieved in the following manner:

[0005] The holding tool for an orthopedic fusion cage comprises

[0006] a sleeve,

[0007] a locking rod installed in the sleeve, and a clamping head provided at the front end of the locking rod and located outside the sleeve;

[0008] a handle installed at the rear end of the sleeve, and a locking mechanism provided in the handle and connected to the rear end of the locking rod;

[0009] The locking mechanism can drive the locking rod to move axially in the sleeve, so as to lock or open the clamping head.

[0010] Further, the clamping head comprises at least two clamping jaws, and the clamping jaws are provided with a tapered transition part with the locking rod.

[0011] Further, the locking mechanism comprises a sliding assembly, a connecting rod and a pull rod,

[0012] the sliding assembly is connected to the locking rod,

[0013] the connecting rod is hingedly connected to the sliding assembly and the pull rod at both ends thereof;

[0014] the front end of the pull rod is hingedly connected to the handle;

[0015] the rear end of the pull rod can be turned towards or away from the handle, and drives the sliding assembly and the locking rod to move axially through the pull rod.

[0016] Further, the sliding assembly comprises a sliding sleeve, a sliding block and a sliding rod.

[0017] The sliding block fixing sleeve is arranged outside the sliding sleeve and is hinged with the connecting rod.

[0018] The front end of the sliding rod is inserted into the sliding sleeve and is connected with the sliding sleeve, and the rear end of the locking rod is connected with the sliding rod through the sliding sleeve.

[0019] Further, the rear end of the locking rod is inserted into the sliding rod and is fixed by using a clamping spring.

[0020] Further, the front end of the sliding rod is provided with an adjusting nut with external threads arranged on the outer surface, and the inner wall of the sliding sleeve is provided with internal threads engaged with the external threads.

[0021] Further, the rear end of the sliding rod is sleeved with a spring, and the rear end of the spring abuts against a screw plug installed at the rear end of the handle.

[0022] Further, the bottom of the sliding block is provided with a positioning groove, and the bottom of the handle is provided with a positioning pin matched with the positioning groove.

[0023] Further, the rear side of the pull rod is provided with a locking block installed on the handle, and the rear end of the pull rod can be buckled on the locking block.

[0024] Further, the rear side of the locking block is provided with a reset spring.

[0025] After the above technical scheme is adopted, the orthopedic fusion cage holding tool has the following beneficial effects:

[0026] By arranging the locking mechanism, the axial movement of the locking rod in the sleeve can be driven, the quick clamping and loosening of the clamping head can be realized, the operation is convenient and simple, the locking state is stable, the problems that the fusion cage is difficult to implant or falls off during holding are avoided, and the operation difficulty and failure risk of the surgery are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] The application will be further described below in combination with the drawings and examples.

[0028] Figure 1 is a structure diagram of the orthopedic fusion cage holding tool in the open state according to the preferred embodiment of the application;

[0029] Figure 2 is a structure diagram of the handle part when the orthopedic fusion cage holding tool is in the locked state according to the preferred embodiment of the application;

[0030] Figure 3 is a diagram of the handle interior when the orthopedic fusion cage holding tool is in the open state according to the preferred embodiment of the application;

[0031] Figure 4This is a cross-sectional view of the handle portion of the orthopedic fusion device holding tool in the locked state according to a preferred embodiment of the present invention;

[0032] Figure 5 This is a cross-sectional view of the handle portion of the orthopedic fusion device holding tool in the open state according to a preferred embodiment of the present invention;

[0033] In the diagram: Sleeve 1, Locking rod 2, Handle 3, Clamping head 4, Conical transition part 5, Connecting rod 6, Pull rod 7, Locking groove 7-1, Sliding sleeve 8, Sliding block 9, Positioning groove I 9-1, Positioning groove II 9-2, Sliding rod 10, Screwdriver slot 10-1, Protruding ring 10-2, Snap ring 11, Adjusting nut 12, Guide pin 13, Spring 14, Plug 15, Positioning pin 16, Locking block 17, Locking protrusion 17-1, Return spring 18. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] like Figures 1-5 As shown, an orthopedic fusion device holding tool includes a sleeve 1, a locking rod 2, and a handle 3. The locking rod 2 is installed inside the sleeve 1, and a clamping head 4 located outside the sleeve 1 is provided at the front end of the locking rod 2. The handle 3 is installed at the rear end of the sleeve 1, and a locking mechanism connected to the rear end of the locking rod 2 is provided inside the handle 3. The locking mechanism can drive the locking rod 2 to move axially inside the sleeve 1, so that the clamping head 4 is locked or opened.

[0037] In order to lock or open the clamping head 4, the clamping head 4 includes at least two jaws, and the jaws and the locking rod 2 are provided with a tapered transition portion 5.

[0038] In this embodiment, the gripping head 4 includes two grippers.

[0039] The tapered transition section 5 has a larger outer diameter at one end connecting to the clamping claw and a smaller outer diameter at the other end connecting to the locking rod 2.

[0040] The two clamping jaws are in an open state in the initial state, and when clamping, the locking mechanism drives the locking rod 2 to move backward in the axial direction, at which time the conical transition part 5 moves into the sleeve 1 along with the locking rod 2, and the sleeve 1 continuously shrinks the conical transition part 5, thereby driving the clamping jaws to move towards the axial direction of the locking rod 2, and realizing the locking of the clamping head 4.

[0041] The locking degree of the clamping head 4 is adjusted by adjusting the degree of the conical transition part 5 entering the sleeve 1, so as to adapt to the holding and locking of different fusion cages.

[0042] In order to drive the locking rod 2 to move in the axial direction, the locking mechanism comprises a sliding assembly, a connecting rod 6 and a pull rod 7, the sliding assembly is connected with the locking rod 2, the connecting rod 6 is hingedly connected with the sliding assembly and the pull rod 7 at both ends, and the front end of the pull rod 7 is hingedly connected with the handle 3.

[0043] The sliding assembly is located in the handle 3, the connecting rod 6 is provided with two and is arranged on both sides of the sliding assembly, the rear end of the pull rod 7 can rotate towards or away from the handle 3, and the sliding assembly and the locking rod 2 are driven to move in the axial direction through the pull rod 7.

[0044] Specifically, the sliding assembly, the connecting rod 6 and the pull rod 7 constitute a crank slider mechanism, that is, when the pull rod 7 is pushed towards the handle 3, the connecting rod 6 can push the sliding assembly to move backward, and the locking rod 2 can be driven to move backward in the axial direction, so as to realize the locking of the clamping head 4 and hold the fusion cage; when the pull rod 7 is released, it rotates to reset away from the handle 3, and the connecting rod 6 can drive the sliding assembly to move forward, thereby driving the locking rod 2 to move forward in the axial direction, so as to open the clamping head 4 and release the fusion cage.

[0045] In order to drive the locking rod 2 to move through the sliding assembly, the sliding assembly comprises a sliding sleeve 8, a sliding block 9 and a sliding rod 10; the sliding block 9 is fixedly sleeved outside the sliding sleeve 8 and is hingedly connected with the connecting rod 6.

[0046] Specifically, the sliding block 9 is used for hingedly connecting the connecting rod 6, that is, two connections are hingedly connected on both sides of the sliding block 9, thereby forming a crank slider mechanism, and the sliding block 9 is fixedly nested outside the sliding sleeve 8 and can drive the sliding sleeve 8 to move through the sliding block 9.

[0047] Preferably, a limiting shaft installed on the inner wall of the handle 3 is arranged above the sliding sleeve 8, which is used for limiting the degree of downward pressing of the pull rod 7.

[0048] The front end of the sliding rod 10 extends into the sliding sleeve 8 and is connected with the sliding sleeve 8, and the rear end of the locking rod 2 penetrates through the sliding sleeve 8 and is connected with the sliding rod 10.

[0049] When the slider 9 drives the sliding sleeve 8 to move, the sliding rod 10 is driven by the sliding sleeve 8 to move, so as to realize the movement of the locking rod 2 in the axial direction. In order to realize the fixation of the locking rod 2 and the sliding rod 10, the rear end of the locking rod 2 extends into the sliding rod 10 and is fixed by the snap spring 11.

[0050] Specifically, the front end of the sliding rod 10 is provided with a locking ring port, and the rear end of the locking rod 2 is provided with a locking groove corresponding to the locking ring port. The snap spring 11 is installed in the locking ring port and is matched in the locking groove, so as to realize the connection between the sliding rod 10 and the locking rod 2.

[0051] In order to realize the connection between the sliding rod 10 and the sliding sleeve 8, the front end of the sliding rod 10 is provided with an adjusting nut 12 with external threads on the outer surface, and the inner wall of the sliding sleeve 8 is provided with internal threads matched with the external threads.

[0052] The adjusting nut 12 is connected with the sliding rod 10, so that the connection between the sliding rod 10 and the sliding sleeve 8 can be realized by the adjusting nut 12.

[0053] And by adjusting the length of the thread cooperation between the adjusting nut 12 and the sliding sleeve 8, the locking degree can be adjusted.

[0054] Preferably, in order to facilitate the adjustment of the length of the thread cooperation between the adjusting nut 12 and the sliding sleeve 8, the rear end of the sliding rod 10 is provided with a slot 10-1, and the rear end of the handle 3 is provided with a threaded hole. At this time, the sliding rod 10 and the adjusting nut 12 can be rotated by using the slot 10-1 matched with the slotter, so as to adjust the length of the thread cooperation between the adjusting nut 12 and the sliding sleeve 8. That is, the length of the thread cooperation between the adjusting nut 12 and the sliding sleeve 8 can be increased by rotating the sliding rod 10 to move forward, and vice versa.

[0055] Specifically, in the locking process, the distance of the rear movement of the sliding sleeve 8 is fixed, and the position of the locking rod 2 in the initial state (i.e. the loosening state) can be adjusted to realize the adjustment of the locking degree.

[0056] When the length of the thread cooperation between the sliding sleeve 8 and the adjusting nut 12 is increased, the initial position of the locking rod 2 is moved forward, and the degree of the rear movement of the locking rod 2 in the locking process can be reduced, so as to reduce the locking degree of the clamping head 4.

[0057] When the length of the thread cooperation between the sliding sleeve 8 and the adjusting nut 12 is reduced, the initial position of the locking rod 2 is moved backward, and the degree of the rear movement of the locking rod 2 in the locking process can be increased, so as to increase the locking degree of the clamping head 4.

[0058] Preferably, in order to realize the guidance of the sliding sleeve 8 and the adjusting nut 12 during the adjustment, the sliding sleeve 8 is provided with a guide pin 13 matched with the non-thread surface of the adjusting nut 12.

[0059] In order to realize the forward reset of the locking rod 2 in the unlocking state, the rear end of the slide rod 10 is sleeved with a spring 14, and the rear end of the spring 14 is abutted against a screw plug 15 installed at the rear end of the handle 3.

[0060] Specifically, the screw plug 15 is installed in the threaded hole at the rear end of the handle 3, the outer portion of the slide rod 10 is provided with a protruding ring 10-2, and the spring 14 is arranged between the protruding ring 10-2 and the screw plug 15.

[0061] In the locking state, the slide rod 10 is moved backward, the spring 14 is pressed through the protruding ring 10-2, and when it is loosened, the spring 14 is restored to push the slide rod 10 and the locking rod 2 to move forward and reset.

[0062] In order to realize the positioning of the locking and opening states, the bottom of the slide block 9 is provided with a positioning groove, and the bottom of the handle 3 is installed with a positioning pin 16 matched with the positioning groove.

[0063] Specifically, the positioning groove includes a positioning groove I 9-1 and a positioning groove II 9-2 located at the front side of the positioning groove I 9-1, wherein the positioning groove I 9-1 is a circular arc-shaped positioning groove, which is used for the positioning of the opening state, and when the clamping head 4 is opened, the ball at the end of the positioning pin 16 is clamped in the positioning groove I 9-1; the positioning groove II 9-2 is a strip-shaped groove structure, which is used for the positioning of the locking process, and when the locking is started, the slide block 9 is constantly moved backward, the ball of the positioning pin 16 is moved out of the positioning groove I 9-1, matched into the positioning groove II 9-2, and continuously moves relative to the slide block 9 in the positioning groove II 9-2 until the locking state is reached.

[0064] In order to realize the locking of the locking state, the rear side of the pull rod 7 is provided with a locking block 17 installed on the handle 3, and the rear end of the pull rod 7 can be buckled on the locking block 17.

[0065] Specifically, the locking block 17 is fixed on the handle 3 by means of a bolt, the rear end of the pull rod 7 is provided with a locking groove 7-1, the front end of the locking block 17 is provided with a locking protrusion 17-1 matched with the locking groove 7-1, and the pull rod 7 can be locked on the locking protrusion 17-1.

[0066] In order to facilitate the unlocking of the locking state of the pull rod 7, the rear side of the locking block 17 is installed with a reset spring 18.

[0067] The locking block 17 is pushed backward to compress the reset spring 18, so that the pull rod 7 can be unlocked, the locking block 17 is loosened, and the pull rod 7 can be moved forward and reset under the action of the reset spring 18, which is convenient for the next locking of the pull rod 7.

[0068] During the operation, the locking degree can be adjusted according to the type of the fusion cage. When locking the fusion cage, the clamping head 4 is matched on the fusion cage, the pull rod 7 is pushed in the direction of the handle 3, the locking rod 2 is moved backward in the axial direction, the spring 14 is compressed, and then the pull rod 7 is locked on the locking block 17, so that the locking and clamping of the fusion cage are realized. When the fusion cage is loosened, the locking block 17 is pushed backward, the pull rod 7 is loosened, the locking rod 2 is reset under the action of the spring 14, and the clamping head 4 is opened, so that the fusion cage is loosened. The whole use process is convenient and simple.

[0069] The holding and taking tool disclosed by the application has simple structure and convenient operation, fully utilizes the mechanical engineering principle, realizes stable clamping of the fusion cage, improves the operation efficiency, and reduces the risk of operation failure.

[0070] Specifically, the holding and taking tool disclosed by the application has the following advantages:

[0071] (1) The locking process of the pull rod 7 can be easily realized during the gripping of the handle 3, which conforms to the ergonomic principle. During the operation, one-handed operation can realize clamping and locking or loosening of the fusion cage, which is convenient and simple to use.

[0072] (2) Through the setting of the crank slider mechanism, the pulling of the pull rod 7 can be converted into greater pushing and pulling force of the slider 9, so that the clamping head 4 has more ideal locking force, and the locking process is completed in one step, which reduces the working strength of the doctor and simplifies the operation process.

[0073] (3) The locking force can be adjusted and selected according to different implant requirements, so as to avoid damage to the implant due to excessive locking force, or unstable clamping of the implant due to too small locking force, and ensure the normal operation of the operation.

[0074] (4) The locking rod 2 and the locking mechanism are detachably matched, the locking rod 2 with different forms and different specifications of the clamping head 4 can be selected according to the needs of the fusion cage, which is convenient to operate, reduces the number of tool accessories, and saves costs.

[0075] Based on the above ideal embodiments according to the application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the application. The technical scope of the application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A tool for holding orthopedic fusion devices, characterized in that, include Sleeve (1), A locking rod (2) is installed inside the sleeve (1), and the front end of the locking rod (2) is provided with a clamping head (4) located outside the sleeve (1); A handle (3) is installed at the rear end of the sleeve (1), and a locking mechanism connected to the rear end of the locking rod (2) is provided inside the handle (3); The locking mechanism can drive the locking rod (2) to move axially within the sleeve (1), so that the clamping head (4) is locked or opened; The locking mechanism includes a sliding assembly, a connecting rod (6), and a pull rod (7). The sliding assembly is connected to the locking rod (2). The two ends of the connecting rod (6) are respectively hinged to the sliding component and the pull rod (7); The front end of the pull rod (7) is hinged to the handle (3); The rear end of the pull rod (7) can rotate toward or away from the handle (3), and drive the sliding component and the locking rod (2) to move axially through the pull rod (7); The sliding assembly includes a sliding sleeve (8), a slider (9), and a sliding rod (10); The slider (9) is fixedly sleeved outside the sleeve (8) and hinged to the connecting rod (6); The front end of the slide rod (10) extends into the slide sleeve (8) and is connected to the slide sleeve (8), and the rear end of the locking rod (2) passes through the slide sleeve (8) and is connected to the slide rod (10); The rear end of the locking rod (2) extends into the slide rod (10) and is fixed by a retaining ring (11); The front end of the slide rod (10) is equipped with an adjusting nut (12) with an external thread on its outer surface, and the inner wall of the slide sleeve (8) is provided with an internal thread that meshes with the external thread; The slider (9) is fixedly nested outside the sleeve (8); The bottom of the slider (9) is provided with a positioning groove, and the bottom of the handle (3) is provided with a positioning pin (16) that cooperates with the positioning groove. The positioning groove includes positioning groove I (9-1) and positioning groove II (9-2) located in front of positioning groove I (9-1), wherein positioning groove I (9-1) is an arc-shaped positioning groove and positioning groove II (9-2) is a strip-shaped groove structure.

2. The orthopedic fusion device holding tool according to claim 1, characterized in that, The clamping head (4) includes at least two jaws, and the jaws and the locking rod (2) are provided with a tapered transition portion (5).

3. The orthopedic fusion device holding tool according to claim 1, characterized in that, The rear end of the slide bar (10) is fitted with a spring (14), and the rear end of the spring (14) abuts against a screw plug (15) installed at the rear end of the handle (3).

4. The orthopedic fusion device holding tool according to claim 1, characterized in that, The rear side of the pull rod (7) is provided with a locking block (17) installed on the handle (3), and the rear end of the pull rod (7) can be fastened to the locking block (17).

5. The orthopedic fusion device holding tool according to claim 4, characterized in that, A return spring (18) is installed on the rear side of the locking block (17).

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