A combination pre-locking device without screw plugs

Abstract

This invention discloses a pre-locking device without screw plugs, comprising an orthopedic puller, a screwdriver, and a combined locking device. The orthopedic puller includes a pull base with a pull rod threadedly connected to it. One end of the pull rod has a rotating groove, and the other end is rotatably connected to a pull block. Guide holes are provided on both sides of the pull rod, and a pull arm is slidably connected within the guide holes. One end of the pull arm is rotatably connected to the pull base, and the other end has a first retaining groove on its inner side. A clearance portion is provided on the outer side of the end of the pull arm near the pull base. The screwdriver includes a screwdriver rod with a first handle at one end and a rotating head at the other end. The combined locking device includes an outer tube with a core rod inside. Protrusions are provided on both sides of the core rod. This pre-locking device simplifies the implant by eliminating screw plugs and introduces an orthopedic puller, a screwdriver, and a combined locking device as a combined instrument, aiming to simplify the surgical procedure.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a screwless, plug-free, modular pre-locking device. Background Technology

[0002] Currently, the mainstream thoracolumbar screw-rod system in China consists of a screw, a titanium rod, and a plug. The procedure involves first inserting the screw, then inserting the titanium rod, and finally tightening the plug. However, this method carries the following risks:

[0003] 1. How to connect screws and titanium rods is a challenge that is consistently attributed to the design of the instruments. However, regardless of the combination of instruments, the operation is quite complex and prone to errors under the high pressure of surgery.

[0004] 2. When tightening the screw plug, instruments often break in hospitals. However, due to limited operating space, it is difficult to increase the strength of the instruments and develop better solutions.

[0005] 3. How to confirm that the screw plug is locked in is also a common problem in screw-rod systems. Even if a torque-limiting wrench is added to the matching instrument, if the doctor does not operate according to the designed procedure or does not use the torque wrench, the instrument is very likely to break, resulting in poor overall performance. Therefore, this invention proposes a screw-plug-free, modular pre-locking instrument. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a screwless combined pre-locking device. This pre-locking device simplifies the implant, removes the screw plug, and introduces an orthopedic puller, screwdriver and combined locking device as a combined device, aiming to simplify the surgical procedure.

[0007] To solve the above-mentioned technical problems, the objective of this invention is achieved as follows: The present invention relates to a screwless combined pre-locking device, comprising an orthopedic puller, a screwdriver, and a combined locking device;

[0008] The orthopedic lifting device includes a lifting base, on which a lifting rod for axial movement is threadedly connected. One end of the lifting rod has a rotating groove, and the other end is rotatably connected to a lifting block. The left and right sides of the lifting rod are respectively provided with a guide hole opened on the lifting block. The guide holes are arranged parallel to the lifting rod. A lifting arm is slidably connected in the guide hole. The end of the lifting arm near the lifting base is rotatably connected to the lifting base, and the inner side of the end away from the lifting base is provided with a first slot. The outer side of the end of the lifting arm near the lifting base is provided with a clearance part extending along the length direction.

[0009] The screwdriver includes a screwdriver handle, one end of which is provided with a first handle and the other end is provided with a rotating head that matches the rotating groove;

[0010] The combined locking device includes an outer tube, inside which is a core rod that can move axially. The core rod has a protrusion near its end on both the left and right sides. The outer tube also contains a first connecting rod and a second connecting rod. One end of the first connecting rod is hinged to the outer tube, and the other end is hinged to the second connecting rod. The end of the second connecting rod that is not connected to the first connecting rod is hinged to the core rod. The side of the outer tube has a side opening near the hinge of the first and second connecting rods. A second handle connected to the first connecting rod is provided in the side opening. A clamping shell with a semi-circular cross-section is rotatably connected to the outer tube. One end of the clamping shell has a driving part, and the other end has a clamping part. The inner side of the clamping part near its end has a second slot. The inner side of the driving part near its end has a groove for the protrusion to be embedded.

[0011] When the two clamping portions are close together, the protrusion is not embedded in the groove; when the two clamping portions are far apart, the protrusion is embedded in the groove.

[0012] The present invention is further configured such that when the two clamping portions are in a close proximity state, the orthopedic lifter can be accommodated therein.

[0013] The present invention is further configured such that: the two sides of the lifting seat are respectively provided with spring pieces that abut against the clamping part.

[0014] The present invention is further configured such that: a first step is provided inside the outer sleeve, a second step is provided on the core rod, and a compression spring is fitted on the core rod with one end abutting against the first step and the other end abutting against the second step.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The locking value of this instrument is standardized in the design, so doctors will not encounter the problem of not being able to determine whether it is locked, which is common in domestic stapler systems, during surgical operations.

[0017] 2. Compared with ordinary staple and rod systems, the operation of screwless staple and rod systems is simple and quick. The orthopedic puller is used to press the rod, and then a combination locking device is used for pre-locking. If orthopedic correction is required afterward, the dispersing and pressurizing instruments can be used directly, avoiding the use of a large number of extension sleeves and plug screwdrivers in conventional surgery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the overall structure of the combined locking device of the present invention;

[0019] Figure 2 This is a schematic diagram illustrating the internal structure of the combined locking device according to the present invention;

[0020] Figure 3This is a schematic diagram illustrating the overall structure of the orthopedic lifting device of the present invention;

[0021] Figure 4 This is a schematic diagram illustrating the internal structure of the orthopedic lifting device of the present invention;

[0022] Figure 5 This is a schematic diagram illustrating the overall structure of the screwdriver according to the present invention;

[0023] Figure 6 This is a schematic diagram of an existing screwless plug structure using this invention for locking. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that these descriptions are merely for further illustrating the features and advantages of the present invention, and not for limiting the scope of the patent claims of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0026] Example 1

[0027] See Figures 1 to 6 As shown, the screwless combination pre-locking device involved in this embodiment includes an orthopedic puller 100, a screwdriver 200 and a combination locking device 300;

[0028] The orthopedic lifting device 100 includes a lifting base 101, on which a lifting rod 102 for axial movement is threadedly connected. One end of the lifting rod 102 is provided with a rotating groove 103, and the other end is rotatably connected to a lifting block 104. A guide hole 105 is provided on the left and right sides of the lifting rod 102 and is provided on the lifting block. The guide hole 105 is arranged parallel to the lifting rod 102. A lifting arm 106 is slidably connected in the guide hole 105. The end of the lifting arm 106 near the lifting base is rotatably connected to the lifting base, and the inner side of the end away from the lifting base is provided with a first slot 107. The outer side of the end of the lifting arm 106 near the lifting base is provided with a clearance part 108 extending along the length direction.

[0029] The screwdriver 200 includes a screwdriver handle 201, one end of which is provided with a first handle 202 and the other end is provided with a rotating head 203 that matches the rotating groove;

[0030] The combined locking device 300 includes an outer sleeve 301, within which a core rod 302 capable of axial movement is disposed. The core rod 302 has a protrusion 303 near its end on each of its left and right sides. The outer sleeve 301 also contains a first connecting rod 304 and a second connecting rod 305. One end of the first connecting rod is hinged to the outer sleeve, and the other end is hinged to the second connecting rod. The end of the second connecting rod not connected to the first connecting rod is hinged to the core rod. The side of the outer sleeve 301 has a... A side opening 306 is located near the hinge of the first and second connecting rods. A second handle 307 connected to the first connecting rod is provided inside the side opening 306. A clamping shell 308 with a semi-circular cross-section is rotatably connected to the outer sleeve 301. One end of the clamping shell 308 has a driving part 3081 and the other end has a clamping part 3082. The inner side of the clamping part 3082 near the end is provided with a second slot 3083. The inner side of the driving part 3081 near the end is provided with a groove 3084 for the protrusion to be embedded.

[0031] When the two clamping portions are close together, the protrusion is not embedded in the groove; when the two clamping portions are far apart, the protrusion is embedded in the groove.

[0032] Furthermore, when the two clamping portions 3082 are close together, the orthopedic lifter 100 can be accommodated therein.

[0033] Furthermore, the lifting seat 101 is provided with spring pieces 109 on both sides to abut against the clamping part.

[0034] Furthermore, the outer sleeve 301 is provided with a first step 3011, the core rod 302 is provided with a second step 3021, and a compression spring 309 is fitted on the core rod 3021, with one end abutting against the first step and the other end abutting against the second step.

[0035] In this embodiment, firstly, by rotating the lifting rod 102 on the orthopedic lifting device 100 counterclockwise with the screwdriver 200, the lifting rod 102 is rotated to the outermost position under the drive of the threaded engagement. The lifting rod 102 drives the lifting block 104 to slide relative to the lifting arm 106. When the lifting block 104 is located in the clearance part 108, the lifting arm 106 can be opened outward. At this time, the heads of the two lifting arms 106 are opened to the maximum.

[0036] Then, align the lower slot (i.e., the first slot 107) of the orthopedic puller 100 with the countersunk hole on the screw plug. By using a screwdriver 200 to rotate the pull rod 102 on the orthopedic puller 100, the pull rod 102 will drive the pull block 104 forward to reset under the drive of the threaded engagement. At this time, due to the movement between the pull block 104 and the pull arm 106, the pull arm 106 begins to tighten, and the slot on the pull arm 106 engages with the countersunk hole of the screw inner ring, gripping the screw. Finally, by continuously rotating the pull rod 102 with a screwdriver, the pull block 104 will continue to move forward until the titanium rod is pressed into the screw inner ring from the outside.

[0037] Finally, align the two sides of the orthopedic puller 100 with the latches of the clamp 308 of the combination locking device 300, press down the combination locking handle (i.e., the second handle 307), and the handle is driven by the first connecting rod 304 and the second connecting rod 305 to push the core rod 302 forward, so that the protrusions 303 on both sides of the core rod change from being located in the groove 3084 to being against the drive part 3081, until the two clamping parts 3082 come together and clamp, holding the outer sleeve of the screw; the handle continues to press down, and the core rod pushes against the orthopedic puller and continues to press down, at this time gradually pressing the outer sleeve and inner ring of the screw to a predetermined distance, completing the locking.

[0038] The combination of the first step 3011, the second step 3021, and the compression spring 309 is used for the core rod 302 to automatically reset.

[0039] The screwless plug-free combined pre-locking device involved in this invention has a standardized locking value in its design, so doctors will not encounter the problem of not being able to determine whether it is locked during surgery, which is common in domestic screw rod systems. Moreover, compared with ordinary screw rod systems, the operation of screwless plug-free devices is simple and quick. The orthopedic puller is used to press the rod, and then the combined locking device is used for pre-locking. If orthopedic correction is required afterward, the expansion and pressure device can be used directly, avoiding the need for a large number of extension sleeves, plug screwdrivers, etc. used in conventional surgery. The overall function is complete and highly practical.

[0040] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0041] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A combination pre-locking device without screw plugs, characterized in that, Includes orthopedic lifters, screwdrivers, and combination locking devices; The orthopedic lifting device includes a lifting base, on which a lifting rod for axial movement is threadedly connected. One end of the lifting rod has a rotating groove, and the other end is rotatably connected to a lifting block. The left and right sides of the lifting rod are respectively provided with a guide hole opened on the lifting block. The guide holes are arranged parallel to the lifting rod. A lifting arm is slidably connected in the guide hole. The end of the lifting arm near the lifting base is rotatably connected to the lifting base, and the inner side of the end away from the lifting base is provided with a first slot. The outer side of the end of the lifting arm near the lifting base is provided with a clearance part extending along the length direction. The screwdriver includes a screwdriver handle, one end of which is provided with a first handle and the other end is provided with a rotating head that matches the rotating groove; The combined locking device includes an outer tube, inside which is a core rod that can move axially. The core rod has a protrusion near its end on both the left and right sides. The outer tube also contains a first connecting rod and a second connecting rod. One end of the first connecting rod is hinged to the outer tube, and the other end is hinged to the second connecting rod. The end of the second connecting rod that is not connected to the first connecting rod is hinged to the core rod. The side of the outer tube has a side opening near the hinge of the first and second connecting rods. A second handle connected to the first connecting rod is provided in the side opening. A clamping shell with a semi-circular cross-section is rotatably connected to the outer tube. One end of the clamping shell has a driving part, and the other end has a clamping part. The inner side of the clamping part near its end has a second slot. The inner side of the driving part near its end has a groove for the protrusion to be embedded. When the two clamping portions are close together, the protrusion is not embedded in the groove; when the two clamping portions are far apart, the protrusion is embedded in the groove; when the two clamping portions are close together, the orthopedic lifter can be accommodated therein. The lifting seat has spring clips on both sides to abut against the clamping part.

2. The screwless plug-free combined pre-locking device according to claim 1, characterized in that, The outer sleeve has a first step, the core rod has a second step, and a compression spring with one end abutting the first step and the other end abutting the second step is fitted on the core rod.

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