Tool for pressurized distraction operation

Abstract

The application provides a tool for pressurized distraction operation, which comprises a rack rod, a rack part provided on the rack rod, a lock block body of a sliding lock block, a sliding rod inserted into a lock block through hole of the lock block body, a tendon condition provided on the sliding rod, two fixed teeth engaged with tooth parts of the rack part when the tool is in a closed state, a sliding block part channel sleeve hole formed by the rack rod and the sliding lock block, a tendon part channel sleeve hole formed by the rack rod, the sliding rod and the tendon condition, the length of the sliding block part channel sleeve hole being equal to the length of the tendon part channel sleeve hole, the width of the sliding block part channel sleeve hole being equal to the width of the tendon part channel sleeve hole, the length of the sliding block part channel sleeve hole being greater than the width of the sliding block part channel sleeve hole, the width of the sliding block part channel sleeve hole being in clearance fit with the width of a channel pipe, and the length of a horizontal cross section of the sliding block part channel sleeve hole being greater than the length of a horizontal cross section of the channel pipe. The tool has simple structure and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a tool for applying pressure and spreading. Background Technology

[0002] For percutaneous minimally invasive spinal surgery using a rod-and-screw fixation system, there is a need to restore certain physiological curvature and height of the spine, which requires compression and / or expansion of the vertebral bodies. The rod-and-screw fixation system includes at least two internal fixation screws and a connecting rod. The internal fixation screws are installed on the vertebral bodies, and the connecting rod connects all the internal fixation screws in series. Before installing the connecting rod, compression and / or expansion of the vertebral bodies is required. Existing tools for compression and expansion have two sleeves. The internal fixation screws on the two vertebral bodies requiring compression or expansion are fitted with connecting tubes. When fitting the two sleeves onto the corresponding connecting tubes from the top, the sleeves must first be adjusted to align with the corresponding connecting tubes. After the sleeves are properly fitted, their positions are then fixed. These steps of aligning the sleeves with the connecting tubes and adjusting and fixing them increase surgical time. Designing a simple and easy-to-operate tool for compression and expansion is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the technical problem solved by the present invention is to provide a tool with a simple structure and convenient operation for applying pressure and spreading.

[0004] To achieve the above and other related objectives, the present invention provides a tool for applying pressure and spreading, through which a channel tube installed on two internal fixing screws is inserted;

[0005] The tool includes: a rack, a sliding rod, a sliding locking block, and a rib condition;

[0006] The rack and the sliding rod are spaced apart, and the bearing surface of the rack and the mounting surface of the sliding rod are opposite to each other.

[0007] The rack rod has a rack portion on its bearing surface, and the length direction of the rack portion is parallel to the length direction of the rack rod.

[0008] The sliding lock block includes a lock block body, two stops, and two fixing teeth. The lock block body has a lock block through hole, and the sliding rod is inserted into the lock block through hole. The lock block body can move along the length direction of the sliding rod. The first side of the lock block body is opposite to the receiving surface of the rack rod. The two stops are disposed on the first side of the lock block body. The two stops are arranged sequentially along the length direction of the sliding lock block. The lock block body and the two stops form an embedded groove. Each stop has a fixing tooth on the end away from the sliding lock block.

[0009] The rack has a rack hinge and a rack positioning part at both ends along its length; the sliding rod has a sliding rod hinge and a sliding rod positioning part at both ends along its length; the rack hinge and the sliding rod hinge are hinged together; the rack positioning part and the sliding rod positioning part are detachably connected.

[0010] The rib condition is provided on the mounting surface of the sliding rod, and compared with the sliding lock block, the rib condition is closer to the toothed rod hinge part;

[0011] When the rack positioning part of the rack rod is connected to the slide rod positioning part of the sliding rod, the tool is in a closed state. The fixed teeth on the two stops mesh with the teeth of the rack part. The rack rod and the sliding locking block form a sliding section channel fitting hole for the insertion of the channel tube. The sides of the rack rod, the sliding rod, and the slide rod hinge part near the sliding rod form a rib section channel fitting hole for the insertion of the channel tube. The length of the horizontal cross-section of the sliding section channel fitting hole is equal to the length of the horizontal cross-section of the rib section channel fitting hole, and the width of the horizontal cross-section of the sliding section channel fitting hole is equal to the width of the horizontal cross-section of the rib section channel fitting hole. The length of the horizontal cross-section of the sliding section channel fitting hole is greater than the width of the horizontal cross-section of the sliding section channel fitting hole. The width of the horizontal cross-section of the sliding section channel fitting hole and the width of the horizontal cross-section of the channel tube are in clearance fit, and the length of the horizontal cross-section of the sliding section channel fitting hole is greater than the length of the horizontal cross-section of the channel tube.

[0012] Preferably, when the tool is in the closed state, the interval between the rib condition and the receiving surface of the rack is less than the width of the horizontal cross-section of the channel tube.

[0013] Preferably, when the tool is in the open state and the sliding rod and the rack form the maximum opening angle, the interval between the rib condition and the bearing surface of the rack is greater than the width of the horizontal cross-section of the channel tube.

[0014] Preferably, the rack positioning part is a positioning hook disposed on the rack; the positioning hook includes a hook arm and a hook head, one end of the hook arm is connected to the receiving surface of the rack, and the hook head is disposed on the other end of the hook arm, with the hook head facing downward;

[0015] The sliding rod positioning part includes a positioning block, a button component, and an elastic element. The positioning block is mounted on the sliding rod, and a positioning groove is provided on the top surface of the positioning block. A side wall through hole for the positioning hook to be inserted is provided on the side wall of the positioning groove. The button component is mounted in the positioning groove and can move along the vertical direction. The button component is provided with a button through hole for the positioning hook to be inserted. An upwardly protruding locking protrusion is provided in the button through hole, and a guide slope is provided on the side of the locking protrusion away from the sliding rod. A locking groove is formed between the side wall of the positioning groove and the locking protrusion.

[0016] The positioning hook can be inserted into the button through hole. When the hook head of the positioning hook moves in the button through hole, the hook head of the positioning hook contacts the guide slope of the locking protrusion, causing the button to move downward. After the hook head of the positioning hook passes the locking protrusion, the button returns to its initial state, the hook head is inserted into the slot, and the hook head hooks the locking protrusion, so that the tool is in a closed state.

[0017] Furthermore, the side of the hook head away from the rack bar is provided with an installation slope; when the positioning hook is inserted into the button through hole and the hook head of the positioning hook moves in the button through hole, the installation slope of the hook head contacts the guide slope of the locking protrusion.

[0018] Furthermore, a bottom block is provided on the bottom surface of the button component, and the elastic element is sleeved on the bottom block.

[0019] Furthermore, the positioning block is provided with a guide pin; the button is provided with a vertically arranged elongated hole, the guide pin is inserted into the elongated hole, and the central axis of the guide pin is perpendicular to the vertical direction.

[0020] Preferably, the rack has an extension arm, the rack hinge is a rack connection hole on the extension arm; the slide bar hinge is a slide bar connection hole on the slide bar; and a connecting pin connects the rack connection hole and the slide bar connection hole in series.

[0021] As described above, the tool for pressure spreading operations of the present invention has the following beneficial effects:

[0022] When using the tool for pressure spreading, the rack and pinion positioning part is separated from the slide rod positioning part of the sliding rod, leaving the tool in the open state. One of the channel tubes is inserted into the channel fitting hole of the rib section from the side of the tool. The position of the sliding locking block on the sliding rod is adjusted according to the position of the other channel tube. When the insertion groove is aligned with the other channel tube, the tool is closed, and the other channel tube is inserted into the channel fitting hole of the slider section. The fixing teeth on the two stops mesh with the teeth of the rack section. At the same time, the rack and pinion positioning part of the rack and pinion is connected to the slide rod positioning part of the sliding rod. Since the length of the horizontal cross-section of the slider section channel fitting hole is equal to the length of the horizontal cross-section of the rib section channel fitting hole, and the width of the horizontal cross-section of the slider section channel fitting hole is equal to the width of the horizontal cross-section of the rib section channel fitting hole, the length of the horizontal cross-section of the slider section channel fitting hole is greater than the width of the horizontal cross-section of the slider section channel fitting hole, and the width of the horizontal cross-section of the slider section channel fitting hole is equal to the width of the horizontal cross-section of the channel tube. The fit is clearance-fitted. The length of the horizontal cross-section of the sliding block channel fitting hole is greater than the length of the horizontal cross-section of the channel tube. Therefore, the movement of the channel tubes in the rib section channel fitting hole and the sliding block channel fitting hole along the width direction of the tool is restricted, while the channel tubes in the rib section channel fitting hole and the sliding block channel fitting hole can move along the length direction of the tool. Thus, the two channel tubes can move relative to each other in the same plane. When a pressure or spreading load is applied to the upper part of the two channel tubes, the movement of the two channel tubes along the length direction of the tool allows the tool to act as a "lever fulcrum," causing the two channel tubes to rotate relative to each other, thus moving the internal fixing screws connected to the lower part of the two channel tubes, thereby achieving the spreading or pressure operation on the vertebrae. That is, when a pressure load is applied to the upper part of the two channel tubes, the spreading operation on the corresponding two vertebrae can be achieved; when a spreading load is applied to the upper part of the two channel tubes, the pressure operation on the corresponding two vertebrae can be achieved.

[0023] Because the two channel tubes can enter between the rack and the sliding rod from the side of the tool, with one channel tube directly inserted into the channel fitting hole of the rib section; the position of the channel fitting hole of the slider section can be adjusted by moving the sliding locking block on the sliding rod, thus reducing the time required for the tool to be installed and fitted with the two channel tubes during surgery; the sliding locking block and the rack are rigidly connected through the meshing of the fixed teeth and the rack, restricting the free sliding of the sliding locking block and forming the channel fitting hole of the slider section, making the position of the channel tube stable in the channel fitting hole of the slider section; when the tool is not closed, the sliding locking block can slide arbitrarily on the movable rod, allowing the tool to match the length of different spinal segments, thus the tool has good segment length adaptability; the tool of this invention has a simple structure, is easy to operate, and can effectively improve the surgical treatment effect, reduce the operation time and operation difficulty. Attached Figure Description

[0024] Figure 1 The diagram shown is a three-dimensional structural schematic of the tool used for pressure spreading in this embodiment during use.

[0025] Figure 2 The diagram shows a three-dimensional structure of the tool used for pressure spreading in this embodiment in a closed state.

[0026] Figure 3 The diagram shows a three-dimensional structure of the tool used for pressure spreading in this embodiment in the open state.

[0027] Figure 4 The diagram shown is a top view of the tool used for applying pressure and spreading in this embodiment, in a closed state.

[0028] Figure 5 Displayed as Figure 4 A schematic diagram of the AA-direction cross-section structure.

[0029] Figure 6 Displayed as Figure 5 A schematic diagram of the structure without elastic elements.

[0030] Figure 7 The diagram shown is a cross-sectional view of the button component of the tool used for applying pressure and spreading in this embodiment.

[0031] Figure 8 Displayed as Figure 5 A structural diagram showing the structure without elastic elements, positioning hooks, and button components.

[0032] Figure 9 The diagram shown is a structural schematic of the tool used for the pressure-spreading operation in this embodiment, in a disassembled state.

[0033] Figure 10 The diagram shown is a three-dimensional structural schematic of the rack and pinion in the tool used for pressure spreading operation in this embodiment.

[0034] Figure 11 The diagram shows a three-dimensional structural schematic of the sliding rod in the tool used for pressure spreading operation in this embodiment.

[0035] Figure 12 The diagram shows a three-dimensional structural schematic of the button component in the tool used for pressurizing and spreading operations in this embodiment.

[0036] Explanation of icon numbers

[0037] 1 Channel Pipe

[0038] 100 rack and pinion

[0039] 101 bearing surface

[0040] 110 Rack Section

[0041] 120 Gear Hinge

[0042] 130 rack positioning section

[0043] 131 Hook Arm

[0044] 132 Hook

[0045] 1321 Installation sloping surface

[0046] 1322 Vertical positioning surface

[0047] 140 extension arm

[0048] 200 sliding bar

[0049] 201 Mounting Surface

[0050] 210 Slide rod hinge

[0051] 220 Slide Rod Positioning Section

[0052] 221 Positioning Block

[0053] 2211 Positioning groove

[0054] 2212 Sidewall Through Hole

[0055] 2213 Pin Hole

[0056] 222 Button component

[0057] 2221 Button Through Hole

[0058] 2222 Card slot protrusion

[0059] 2223 Guide slope

[0060] 2224 Card Slot

[0061] 2225 elongated hole

[0062] 2226 Vertical snap-fit ​​surface

[0063] 2227 Pressing part

[0064] 223 Elastic element

[0065] 224 base blocks

[0066] 225 guide pin

[0067] 300 sliding lock block

[0068] 310 lock block body

[0069] 311 Locking block through hole

[0070] 312 Block First Side

[0071] 320 stop block

[0072] 330 fixed teeth

[0073] 340 Embedded Slot

[0074] 400 rib conditions

[0075] 500 Slider section channel fitting hole

[0076] 600 Rib Section Channel Fitting Hole

[0077] 700 connecting pin

[0078] The length of the horizontal cross-section of the L1 slider section channel fitting hole

[0079] The length of the horizontal cross-section of the L2 rib section channel fitting hole

[0080] The width of the horizontal cross-section of the W1 slider section channel fitting hole.

[0081] The width of the horizontal cross-section of the W2 rib section channel fitting hole.

[0082] The interval between the T1 reinforcement condition and the bearing surface of the rack rod. Detailed Implementation

[0083] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0084] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0085] like Figures 1 to 12As shown, the tool used for the pressure-opening operation in this embodiment is through which the channel tube 1 installed on the two internal fixing screws is inserted;

[0086] The tools include: rack and pinion 100, sliding rod 200, sliding locking block 300 and rib condition 400;

[0087] The rack 100 and the sliding rod 200 are spaced apart, and the bearing surface 101 of the rack 100 and the mounting surface 201 of the sliding rod 200 are opposite to each other.

[0088] The rack bar 100 has a rack portion 110 on its receiving surface 101, and the length direction of the rack portion 110 is parallel to the length direction of the rack bar 100.

[0089] The sliding lock block 300 includes a lock block body 310, two stops 320, and two fixing teeth 330. The lock block body 310 has a lock block through hole 311, and the sliding rod 200 is inserted into the lock block through hole 311. The lock block body 310 can move along the length direction of the sliding rod 200. The first side surface 312 of the lock block body 310 is opposite to the receiving surface 101 of the rack rod 100. The two stops 320 are disposed on the first side surface 312 of the lock block body 310. The two stops 320 are arranged sequentially along the length direction of the sliding lock block 300. The lock block body 310 and the two stops 320 form an embedded groove 340. Each stop 320 has a fixing tooth 330 on the end away from the sliding lock block 300.

[0090] The rack 100 has a rack hinge portion 120 and a rack positioning portion 130 at both ends in the length direction; the sliding rod 200 has a sliding rod hinge portion 210 and a sliding rod positioning portion 220 at both ends in the length direction; the rack hinge portion 120 is hinged to the sliding rod hinge portion 210; the rack positioning portion 130 and the sliding rod positioning portion 220 are detachably connected.

[0091] Rib condition 400 is provided on the mounting surface 201 of sliding rod 200. Compared with sliding lock block 300, rib condition 400 is closer to the toothed rod hinge part 120.

[0092] When the rack positioning part 130 of the rack 100 is connected to the slide rod positioning part 220 of the slide rod 200, the tool is in a closed state. The fixed teeth 330 on the two stops 320 mesh with the teeth of the rack part 110. The rack 100 and the sliding locking block 300 form a sliding part channel fitting hole 500 for the insertion of the channel tube 1. The rack 100, the slide rod 200 and the side of the slide rod hinge part 210 of the rib condition 400 near the slide rod 200 form a rib part channel fitting hole 600 for the insertion of the channel tube 1. The length L1 of the horizontal cross-section of the sliding part channel fitting hole 500 is equal to that of the rib part channel fitting hole. The length L2 of the horizontal cross-section of the 600 is equal to the width W1 of the horizontal cross-section of the sliding block channel fitting hole 500. The length L1 of the horizontal cross-section of the sliding block channel fitting hole 500 is greater than the width W1 of the horizontal cross-section of the sliding block channel fitting hole 500. The width W1 of the horizontal cross-section of the sliding block channel fitting hole 500 and the width of the horizontal cross-section of the channel tube 1 are in clearance fit. The length L1 of the horizontal cross-section of the sliding block channel fitting hole 500 is greater than the length of the horizontal cross-section of the channel tube 1.

[0093] This tool is used for spinal compression and expansion operations. When using the tool, the rack positioning part 130 of the rack 100 and the slide rod positioning part 220 of the slide rod 200 are separated, leaving the tool in an open state. One of the channel tubes 1 is inserted into the channel fitting hole 600 of the rib section from the side of the tool. The position of the sliding locking block 300 on the slide rod 200 is adjusted according to the position of the other channel tube 1. When the insertion groove 340 is aligned with the other channel tube 1, the tool is closed, and the other channel tube 1 is inserted into the channel fitting hole 500 of the slide block section. The fixing teeth 330 on the two stops 320 mesh with the teeth of the rack 110. Simultaneously, the rack positioning part 130 of the rack 100 is connected to the slide rod positioning part 220 of the slide rod 200; since the length L1 of the horizontal cross-section of the sliding block channel fitting hole 500 is equal to the length L2 of the horizontal cross-section of the rib channel fitting hole 600, and the width W1 of the horizontal cross-section of the sliding block channel fitting hole 500 is equal to the width W2 of the horizontal cross-section of the rib channel fitting hole 600; the length L1 of the horizontal cross-section of the sliding block channel fitting hole 500 is greater than the width W1 of the horizontal cross-section of the sliding block channel fitting hole 500; the sliding block channel... The width W1 of the horizontal cross-section of the fitting hole 500 and the width of the horizontal cross-section of the channel tube 1 are in clearance fit. The length L1 of the horizontal cross-section of the sliding block channel fitting hole 500 is greater than the length of the horizontal cross-section of the channel tube 1. Therefore, the movement of the channel tube 1 in the rib section channel fitting hole 600 and the channel tube 1 in the sliding block channel fitting hole 500 along the width direction of the tool is restricted, while the channel tube 1 in the rib section channel fitting hole 600 and the channel tube 1 in the sliding block channel fitting hole 500 can move along the length direction of the tool. The tubes 1 can move relative to each other in the same plane; when a pressure or spreading load is applied to the upper part of the two channel tubes 1, the movement of the two channel tubes 1 along the length of the tool allows the tool to act as a "lever fulcrum" to make the two channel tubes 1 rotate relative to each other, causing the internal fixation screws connected to the lower part of the two channel tubes 1 to move, thereby realizing the spreading or pressure operation on the vertebral body; that is, when a pressure load is applied to the upper part of the two channel tubes 1, the corresponding two vertebral bodies can be spread open; when a spreading load is applied to the upper part of the two channel tubes 1, the corresponding two vertebral bodies can be pressured.

[0094] Since the two channel tubes 1 can enter the space between the rack rod 100 and the sliding rod 200 from the side of the tool, and one of the channel tubes 1 is directly inserted into the channel fitting hole 600 of the rib section; the position of the channel fitting hole 500 of the slider section can be adjusted by moving the sliding locking block 300 on the sliding rod 200, so compared with the operation steps in the prior art, this tool can reduce the time for the tool to install and cooperate with the two channel tubes 1 during surgery; the sliding locking block 300 and the rack rod 100 are rigidly connected by the engagement of the fixed teeth 330 and the rack, which restricts the free sliding of the sliding locking block 300 and forms the channel fitting hole 500 of the slider section, so that the position of the channel tube 1 in the channel fitting hole 500 of the slider section is stable; when the tool is not closed, the sliding locking block 300 can slide arbitrarily on the movable rod, so the tool can match the length of different spinal segments, so the tool has good segment length adaptability; the tool of the present invention has a simple structure, is easy to operate, and can effectively improve the surgical treatment effect, reduce the operation time and operation difficulty.

[0095] In this embodiment, the horizontal cross-section of the channel tube 1 is circular, and both the width and length of the horizontal cross-section of the channel tube 1 are the outer diameter of the horizontal cross-section of the channel tube 1. The channel tube 1 is a minimally invasive channel tube.

[0096] The sliding rod 200 is clearance-fitted with the locking block through hole 311. The shape of the vertical cross-section of the locking block through hole 311 is the same as the shape of the vertical cross-section of the sliding rod 200. This structure allows the sliding locking block 300 to move stably along the length of the sliding rod 200. The embedded groove 340 has a U-shaped structure.

[0097] The width W1 of the horizontal cross-section of the sliding block channel fitting hole 500 is clearance-fitted with the width of the horizontal cross-section of the channel tube 1. In this embodiment, the width W1 of the horizontal cross-section of the sliding block channel fitting hole 500 is 0.1mm-0.2mm larger than the width of the horizontal cross-section of the channel tube 1. This effectively restricts the degree of freedom of the channel tube 1 in the width direction of the tool, thereby constraining the two channel tubes 1 to move only in the same plane. In this embodiment, the width W1 of the horizontal cross-section of the sliding block channel fitting hole 500 is 0.15mm larger than the width of the horizontal cross-section of the channel tube 1.

[0098] When the tool is in the closed state, the gap T1 between the rib condition 400 and the bearing surface 101 of the rack rod 100 is less than the width of the horizontal cross-section of the channel tube 1. This structure can ensure that the tool does not come out during the movement of the channel tube 1 through the rib section channel fitting hole 600.

[0099] When the rack 100 and sliding rod 200 are in the open state, and the sliding rod 200 and rack 100 form the maximum opening angle, the gap T1 between the rib condition 400 and the bearing surface 101 of the rack 100 is greater than the width of the horizontal cross-section of the channel tube 1. This structure allows the channel tube 1 to smoothly pass through the gap T1 between the rib condition 400 and the bearing surface 101 of the rack 100 and enter the rib section channel fitting hole 600 when the tool is fitted with the channel tube 1.

[0100] The rack positioning part 130 is a positioning hook provided on the rack 100; the positioning hook includes a hook arm 131 and a hook head 132. One end of the hook arm 131 is connected to the receiving surface 101 of the rack 100, and the other end of the hook arm 131 is provided with a hook head 132, which faces downward.

[0101] The slider positioning part 220 includes a positioning block 221, a button 222, and an elastic element 223. The positioning block 221 is mounted on the slider 200. The top surface of the positioning block 221 is provided with a positioning groove 2211, and the side wall of the positioning groove 2211 is provided with a side wall through hole 2212 for the insertion of a positioning hook. The button 222 is mounted in the positioning groove 2211 and can move vertically. The button 222 is provided with a button through hole 2221 for the insertion of a positioning hook. The button through hole 2221 is provided with an upwardly protruding locking protrusion 2222, and the side of the locking protrusion 2222 away from the slider 200 is provided with a guide slope 2223. A locking groove 2224 is formed between the side wall of the positioning groove 2211 and the locking protrusion 2222. The elastic element 223 is located between the button 222 and the bottom surface 2214 of the positioning groove 2211.

[0102] After the positioning hook passes through the side wall through hole 2212, it enters the button through hole 2221. When the hook head 132 of the positioning hook moves in the button through hole 2221, the hook head 132 of the positioning hook contacts the guide slope 2223 of the locking protrusion 2222, causing the button 222 to move downward. After the hook head 132 of the positioning hook passes the locking protrusion 2222, the button 222 returns to its initial state, the hook head 132 is inserted into the slot 2224, and the hook head 132 hooks the locking protrusion 2222, so that the tool is in a closed state.

[0103] When the tool is in its initial state, it is in a closed state. At this time, the hook arm 131 of the positioning hook passes through the side wall through hole 2212 and the hook arm 131 passes into the button through hole 2221; the hook head 132 is inserted into the slot 2224 and hooks the locking protrusion 2222. At this time, the hook head 132 is engaged with the locking protrusion 2222, so the position of the hook head 132 is stable and the hook head 132 will not come out of the button 222. The positioning hook is locked with the button 222.

[0104] When the tool needs to be opened, press the top surface of the button 222, causing the button 222 to move downwards. The elastic element 223 is compressed, and the hook 132 can be moved out of the button through hole 2221. After the hook 132 separates from the locking protrusion 2222, the restoring force of the elastic element 223 causes the button 222 to move upwards to the initial state. Rotate the sliding rod 200 away from the rack 100, and the angle between the sliding rod 200 and the rack 100 gradually increases.

[0105] When the tool needs to be closed again, the positioning hook passes through the side wall through hole 2212 and then into the button through hole 2221. The hook head 132 of the positioning hook can move along the guide slope 2223 of the locking protrusion 2222, causing the button 222 to move downward. After the hook head 132 of the positioning hook passes the locking protrusion 2222, the button 222 returns to its initial state, the hook head 132 is inserted into the slot 2224, and the hook head 132 hooks the locking protrusion 2222.

[0106] When the tool is in the closed state, the hook 132 hooks onto the locking protrusion 2222, forming a "hook-lock" connection structure. Under the action of the elastic element 223, the button 222 is always in contact with the hook 132, and the "hook-lock" state is not easily broken. At this time, the rack 100 and the sliding rod 200 of the tool complete the "snap-lock" connection. When it is necessary to release the "hook-lock" connection between the hook 132 and the locking protrusion 2222, press down on the button 222 to disengage it from the positioning hook. The rack 100 and the sliding rod 200 are connected through the "hook-lock" connection structure. The elastic element 223 and the button 222 are also provided, so that the rack 100 and the sliding rod 200 can be locked and disassembled through an efficient and convenient mechanism, which greatly simplifies the use of the tool.

[0107] The locking protrusion 2222 has a guide slope 2223 on the side away from the sliding rod 200. This structure allows the locking protrusion 2222 to move stably downward when the guide slope 2223 of the locking protrusion 2222 is pressed by the positioning hook. In other words, the button 222 can move downward in the positioning groove 2211 of the positioning block 221.

[0108] The side of the hook head 132 away from the rack rod 100 is provided with an installation slope 1321; when the positioning hook is inserted into the button through hole 2221, and the hook head 132 of the positioning hook moves in the button through hole 2221, the installation slope 1321 of the hook head 132 contacts the guide slope 2223 of the locking protrusion 2222. This structure makes it easy for the hook head 132 to push the locking protrusion 2222.

[0109] In this embodiment, the side of the hook head 132 near the rack rod 100 is a vertical positioning surface 1322, and the side of the locking protrusion 2222 near the sliding rod 200 is provided with a vertical engaging surface 2226. When the tool is in the closed state, the vertical positioning surface 1322 contacts the vertical engaging surface 2226, so that the hook head 132 and the locking protrusion 2222 form a stable engaging structure. The shape of the button through hole 2221 matches the shape of the positioning hook, and the size of the button through hole 2221 matches the size of the positioning hook, so that the positioning hook can be inserted into the button through hole 2221.

[0110] A base block 224 is provided on the bottom surface of the button component 222, and an elastic element 223 is fitted onto the base block 224, with the upper end of the elastic element 223 contacting the bottom surface of the button component 222. This structure stabilizes the position of the elastic element 223 and prevents it from shifting during use.

[0111] The positioning block 221 is provided with a guide pin 225; the button component 222 is provided with a vertically arranged elongated hole 2225, into which the guide pin 225 is inserted, and the central axis of the guide pin 225 is perpendicular to the vertical direction. During the vertical movement of the button component 222, the guide pin 225 ensures that the button component 222 can move vertically within the positioning groove 2211 of the positioning block 221, preventing the button component 222 from shifting during movement. When the button component 222 is in its initial state, under the action of the elastic element 223, the bottom of the elongated hole 2225 contacts the guide pin 225, meaning the elongated hole 2225 supports the guide pin 225, thus stabilizing the position of the button component 222.

[0112] In this embodiment, the positioning block 221 is provided with two oppositely arranged pin holes 2213, and the two ends of the guide pin 225 are respectively inserted into the two pin holes 2213; the guide pin 225 is cylindrical, and the width of the guide pin 225 and the elongated hole 2225 are clearance fit, and the two ends of the elongated hole 2225 are arc-shaped structures, and the structure of the guide pin 225 is adapted to the shape of the elongated hole 2225; there are two elongated holes 2225, which are arranged in parallel, and the guide pin 225 passes through the two elongated holes 2225 in sequence, and each elongated hole 2225 is connected to the positioning groove 2211.

[0113] The shape of the horizontal cross-section of the button 222 is the same as the shape of the horizontal cross-section of the positioning groove 2211 of the positioning block 221; this structure allows the button 222 to slide stably in the positioning groove 2211 along the vertical direction.

[0114] The upper part of the button 222 is provided with a pressing part 2227 to improve the comfort of pressing operation. In this embodiment, the pressing part 2227 has a circular structure.

[0115] The rack 100 has an extension arm 140, and the rack hinge portion 120 is a rack connecting hole provided on the extension arm 140; the slide rod hinge portion 210 is a slide rod connecting hole provided on the slide rod 200; the connecting pin 700 connects the rack connecting hole and the slide rod connecting hole in series. This structure allows both the rack 100 and the slide rod 200 to rotate around the connecting pin, which is simple and facilitates the closing and opening of the tool.

[0116] In this embodiment, since the channel tube 1 is circular, the inner side of the extension arm 140 is set as an arc surface, and the side of the slide rod hinge portion 210 of the rib condition 400 near the slide rod 200 is set as an arc surface. This structure allows the channel tube 1 to move to the end of the rib section channel fitting hole 600 in the length L2 direction, and when the channel tube 1 rotates, the end of the rib section channel fitting hole 600 can stably support the channel tube 1. For ease of processing, the side of the slide rod hinge portion 210 of the rib condition 400 away from the slide rod 200 is flat.

[0117] The tool of the present invention includes the following steps:

[0118] 1) Before fitting the channel tube 1, the tool is in an open state, ensuring that the opening width of the tool is greater than the diameter of the channel tube 1. Insert one of the channel tubes 1 into the channel fitting hole 600 of the rib section from the side of the tool. At the same time, adjust the position of the sliding locking block 300 on the sliding rod 200 according to the position of the other channel tube 1. When the U-shaped embedding groove 340 is aligned with the other channel tube 1, close the tool so that the other channel tube 1 is inserted into the U-shaped embedding groove 340. Then, engage the fixing tooth 330 on the sliding locking block 300 with the rack section 110 on the rack rod 100. At the same time, connect the positioning hook with the locking protrusion 2222 in the button through hole 2221 of the button 222 to form a "hook-lock" connection structure, so that the two channel tubes 1 are stably placed into the sliding block channel fitting hole 500 and the rib section channel fitting hole 600 respectively. The opening width of the tool is the interval T1 between the rib condition 400 and the bearing surface 101 of the rack rod 100.

[0119] 2) Surgical operations can be performed directly on the two channel tubes 1 as needed, that is, loads are applied to the two channel tubes 1, and the target spinal segment is stretched or compressed within a certain range by lever principle; after the operation is completed, the rack rod 100 and sliding rod 200 can be quickly disassembled by simply pressing the button 222, which is very convenient.

[0120] This tool can be used to fit a minimally invasive channel tube 1. Its smooth surface and the fact that all functional structures are located within the supporting structure save surgical space. This passive device features a simple structure, high efficiency, compact size, easy operation, direct force application, and convenient adjustment.

[0121] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A tool for applying pressure and spreading, through which a channel tube (1) mounted on two internal fixing screws is inserted; characterized in that, The tool includes: a rack (100), a sliding rod (200), a sliding locking block (300), and a rib condition (400); The rack (100) and the sliding rod (200) are spaced apart, and the bearing surface (101) of the rack (100) and the mounting surface (201) of the sliding rod (200) are opposite to each other. The rack bar (100) has a rack portion (110) on its receiving surface (101), and the length direction of the rack portion (110) is parallel to the length direction of the rack bar (100). The sliding lock block (300) includes a lock block body (310), two stops (320), and two fixing teeth (330). The lock block body (310) has a lock block through hole (311), and the sliding rod (200) is inserted into the lock block through hole (311). The lock block body (310) can move along the length direction of the sliding rod (200). The first side surface (312) of the lock block body (310) is connected to the rack rod (100). The receiving surfaces (101) face each other, and the two stops (320) are disposed on the first side (312) of the block body (310). The two stops (320) are arranged sequentially along the length direction of the sliding lock block (300). The lock body (310) and the two stops (320) form an embedded groove (340). Each stop (320) has a fixing tooth (330) on the end away from the sliding lock block (300). The rack (100) has a rack hinge (120) and a rack positioning part (130) at both ends in the length direction; the sliding rod (200) has a sliding rod hinge (210) and a sliding rod positioning part (220) at both ends in the length direction; the rack hinge (120) is hinged to the sliding rod hinge (210); the rack positioning part (130) and the sliding rod positioning part (220) are detachably connected; The rib condition (400) is provided on the mounting surface (201) of the sliding rod (200). Compared with the sliding lock block (300), the rib condition (400) is closer to the gear hinge part (120). When the rack positioning part (130) of the rack (100) is connected to the slide rod positioning part (220) of the sliding rod (200), the tool is in a closed state, and the fixed teeth (330) on the two stops (320) mesh with the teeth of the rack part (110). The rack (100) and the sliding locking block (300) form a sliding block channel fitting hole (500) for the insertion of the channel tube (1). The sides of the rack (100), the sliding rod (200), and the rib condition (400) near the slide rod hinge part (210) of the sliding rod (200) form a rib section channel fitting hole (600) for the insertion of the channel tube (1). The sliding block channel fitting hole (500) The length of the horizontal cross section is equal to the length of the horizontal cross section of the rib section channel fitting hole (600), and the width of the horizontal cross section of the slider section channel fitting hole (500) is equal to the width of the horizontal cross section of the rib section channel fitting hole (600); the length of the horizontal cross section of the slider section channel fitting hole (500) is greater than the width of the horizontal cross section of the slider section channel fitting hole (500); the width of the horizontal cross section of the slider section channel fitting hole (500) and the width of the horizontal cross section of the channel tube (1) are in clearance fit, and the length of the horizontal cross section of the slider section channel fitting hole (500) is greater than the length of the horizontal cross section of the channel tube (1).

2. The tool for applying pressure and spreading operations according to claim 1, characterized in that: When the tool is in the closed state, the interval between the rib condition (400) and the bearing surface (101) of the rack rod (100) is less than the width of the horizontal cross-section of the channel tube (1).

3. The tool for applying pressure and spreading operations according to claim 1, characterized in that: When the tool is in the open state and the sliding rod (200) and the rack rod (100) form the maximum opening angle, the interval between the rib condition (400) and the bearing surface (101) of the rack rod (100) is greater than the width of the horizontal cross-section of the channel tube (1).

4. The tool for applying pressure and spreading operations according to claim 1, characterized in that: The rack positioning part (130) is a positioning hook disposed on the rack (100); the positioning hook includes a hook arm (131) and a hook head (132), one end of the hook arm (131) is connected to the receiving surface (101) of the rack (100), and the hook head (132) is disposed on the other end of the hook arm (131), with the hook head (132) facing downward; The sliding rod positioning part (220) includes a positioning block (221), a button (222), and an elastic element (223). The positioning block (221) is mounted on the sliding rod (200). The top surface of the positioning block (221) is provided with a positioning groove (2211), and the side wall of the positioning groove (2211) is provided with a side wall through hole (2212) for the positioning hook to be inserted. The button (222) is installed in the positioning groove (2211). The button (222) can move in the vertical direction. 22) A button through hole (2221) is provided for the insertion of the positioning hook; the button through hole (2221) is provided with an upwardly protruding locking protrusion (2222), and a guide slope (2223) is provided on the side of the locking protrusion (2222) away from the sliding rod (200); a locking groove (2224) is formed between the groove sidewall of the positioning groove (2211) and the locking protrusion (2222); the elastic element (223) is located between the button (222) and the bottom surface (2214) of the positioning groove (2211); The positioning hook can be inserted into the button through hole (2221). When the hook head (132) of the positioning hook moves in the button through hole (2221), the hook head (132) of the positioning hook contacts the guide slope (2223) of the locking protrusion (2222), causing the button (222) to move downward. After the hook head (132) of the positioning hook passes the locking protrusion (2222), the button (222) returns to its initial state. The hook head (132) is inserted into the slot (2224), and the hook head (132) hooks the locking protrusion (2222), so that the tool is in a closed state.

5. The tool for applying pressure and spreading operations according to claim 4, characterized in that: The hook head (132) has an installation slope (1321) on the side away from the rack rod (100); when the positioning hook is inserted into the button through hole (2221) and the hook head (132) of the positioning hook moves in the button through hole (2221), the installation slope (1321) of the hook head (132) contacts the guide slope (2223) of the locking protrusion (2222).

6. The tool for applying pressure and spreading operations according to claim 4, characterized in that: The bottom surface of the button (222) is provided with a bottom block (324), and the elastic element (223) is sleeved on the bottom block (324).

7. The tool for applying pressure and spreading operations according to claim 4, characterized in that: The positioning block (221) is provided with a guide pin (325); the button (222) is provided with a vertically arranged elongated hole (2225), the guide pin (325) is inserted into the elongated hole (2225), and the central axis of the guide pin (325) is perpendicular to the vertical direction.

8. The tool for applying pressure and spreading operations according to claim 1, characterized in that: The rack (100) is provided with an extension arm (140), the rack hinge (120) is a rack connection hole provided on the extension arm (140); the slide rod hinge (210) is a slide rod connection hole provided on the slide rod (200); the connecting pin (700) connects the rack connection hole and the slide rod connection hole in series.

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