Adjustable blade-free intervertebral space processor

Abstract

The utility model discloses an adjustable edgeless intervertebral space processor which comprises a knife handle, a sliding rod structure which is installed at the axis of the knife handle and slides in the axial direction of the knife handle, and a knife head assembly which is installed at the lower end of the knife handle and is adjustable in opening angle. The lower end of the sliding rod structure is connected with and drives the tool bit assembly. According to the device, the opening angle of the blade is reasonably adjusted through the sliding rod structure according to the position of the hyperplasia tissue needing to be treated, so that the blade can be inserted into the position needing to be treated, the operation requirement is met, and the device is suitable for application and popularization.

Description

Technical Field

[0001] The utility model relates to an adjustable bladeless intervertebral disc processor. Background Art

[0002] In open surgery of lumbar disc, a reamer is needed to remove the hyperplastic part or other tissue structure to achieve the purpose of adjusting the lumbar intervertebral space.

[0003] However, in actual operation, the reamer in the prior art has a sharp blade, and the opening diameter of the blade is fixed. It cannot be effectively adjusted for narrow positions and cannot meet surgical needs. In addition, the longer blade has a certain probability of damaging the nerve tissue at the lumbar spine, resulting in surgical failure.

[0004] Based on the above problems, we designed an adjustable bladeless intervertebral disc processor that can adjust the scope of action to meet surgical needs and reduce the chance of damage to nerve tissue. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an adjustable bladeless intervertebral disc processor which can adjust the action range, meet the surgical needs and reduce the probability of nerve tissue damage.

[0006] The utility model is realized by the following technical solutions:

[0007] An adjustable bladeless intervertebral disc processor comprises a handle, a slide rod structure installed at the axis of the handle and sliding along the axial direction of the handle, and a cutter head assembly installed at the lower end of the handle and with an adjustable opening angle, wherein the lower end of the slide rod structure is connected to drive the cutter head assembly.

[0008] Preferably, an operating handle is provided at the upper end of the knife handle, and the sliding rod structure cooperates with the operating handle.

[0009] Preferably, a stepped hole is provided inside the knife handle, and the stepped hole includes a first hole position, a second hole position and a third hole position, and the first hole position, the second hole position and the third hole position are arranged in sequence from top to bottom, and the sliding rod structure includes a sliding rod, and the sliding rod is transitionally matched with the first hole position, and a pull handle is provided at the upper end of the sliding rod, and the pull handle corresponds to the operating handle. The sliding rod is provided with a retaining ring near the lower end, and a spring is sleeved on the sliding rod, and the spring acts between the retaining ring and the stepped surface of the stepped hole. Under the action of the spring, the sliding rod moves downward, and the tool head assembly is installed at the lower end of the sliding rod.

[0010] Preferably, the cutter head assembly includes two partially overlapping blades, the outer sides of the blades are provided with blade teeth, the upper ends of the blades are provided with handles, and the overlapping positions of the two blades are provided with pins, the blades rotate along the pins, and a connecting rod is rotatably provided between the handles and the slide rod, and when the slide rod slides upward, the two blades rotate outward to open, and when the slide rod is reset under the action of a spring, the two blades move closer to each other and close.

[0011] Preferably, a slide groove is provided on the inner wall of the third hole, the slide groove is vertically arranged, and the pin shaft is fitted in the slide groove.

[0012] Preferably, the inner angle formed by the connecting rod and the handle is α, and when the sliding rod slides upward to the limit position, the angle α is opened to the maximum, and at this time α is less than 180°.

[0013] Preferably, a finger groove for positioning fingers is provided at the bottom of the handle.

[0014] The beneficial effects of the utility model are:

[0015] In this device, an angle-openable blade is used. The outer side of the blade has no cutting edge, but only teeth. The teeth are distributed at the lower part of the outer side of the blade. The coverage length is shorter and more controllable, reducing the chance of damage to nerve tissue.

[0016] In the device, according to the position of the hyperplastic tissue to be treated, the opening angle of the blade is reasonably adjusted through the slide rod structure, so that the blade can be inserted into the desired treatment position, meeting the surgical needs and being suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the cooperation between the slide bar structure and the cutter head assembly;

[0020] Figure 3 A schematic diagram of the folding of the cutter head assembly;

[0021] Figure 4 This is a schematic diagram of the opening of the cutter head assembly. DETAILED DESCRIPTION

[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0023] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0024] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, in the description of the present invention, “plurality” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "set", "socket", "connect", "penetrate", "plug in" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1 and Figure 2 An adjustable bladeless intervertebral disc processor shown includes a handle 1, a slide rod structure 2 installed at the axis of the handle 1 and sliding along the axial direction of the handle 1, and a cutter head assembly 3 installed at the lower end of the handle 1 and with an adjustable opening angle, and the lower end of the slide rod structure 2 is connected to drive the cutter head assembly 3.

[0028] By adjusting the position of the slide rod structure 2, the opening angle of the cutter head assembly 3 can be adaptively changed to meet the use requirements in different situations.

[0029] See also Figure 1As shown, an operating handle 121 is provided at the upper end of the knife handle 1 , and the slide rod structure 2 cooperates with the operating handle 121 .

[0030] When in use, the operating handle 121 is applied to the palm, and the thumb, little finger and ring finger are used to grasp the device to maintain stability in use.

[0031] See also Figure 2 and Figure 3 As shown, the handle 1 is provided with a stepped hole 4 inside, and the stepped hole 4 includes a first hole position 41, a second hole position 42 and a third hole position 43, and the first hole position 41, the second hole position 42 and the third hole position 43 are arranged in sequence from top to bottom, and the slide rod structure 2 includes a slide rod 21, and the slide rod 21 is transitionally matched with the first hole position 41, and a pull handle 22 is provided at the upper end of the slide rod 21, and the pull handle 22 corresponds to the operating handle 121, and a retaining ring 23 is provided near the lower end of the slide rod 21, and a spring 24 is sleeved on the slide rod 21, and the spring 24 acts between the retaining ring 23 and the stepped surface of the stepped hole 4. Under the action of the spring 24, the slide rod 21 moves downward, and the tool head assembly 3 is installed at the lower end of the slide rod 21.

[0032] The spring 24 is used to reset the cutter head assembly 3 so that the cutter head assembly 3 is retracted, the handle 22 is hooked by the index finger and the middle finger, and then the slide bar 21 is pulled to slide.

[0033] See also Figure 2 , Figure 3 and Figure 4 As shown, the cutter head assembly 3 includes two partially overlapping blades 31, the outer sides of the blades 31 are provided with blade teeth 32, the upper ends of the blades 31 are provided with handles 33, and the overlapping positions of the two blades 31 are provided with pins 34. The blades 31 rotate along the pins 34, and a connecting rod 35 is rotatably provided between the handles 33 and the slide bar 21. When the slide bar 21 slides upward, the two blades 31 rotate outward to open, and when the slide bar 21 is reset under the action of the spring 24, the two blades 31 move closer to each other and close.

[0034] In the above technical solution, the slide bar 21 pulls the connecting rod 35 to open the blade 31. When the handle is released, the slide bar 21 is reset and the two blades 31 are retracted.

[0035] See also Figure 3 As shown, a slide groove 444 is provided at the inner wall of the third hole 43 , the slide groove 444 is vertically arranged, and the pin shaft 34 is fitted in the slide groove 444 .

[0036] The slide groove 444 guides the sliding movement of the pin shaft 34 .

[0037] See also Figure 4 As shown, the inner angle formed by the connecting rod 35 and the handle 33 is α. When the slide bar slides upward to the limit position, α is opened to the maximum, and at this time α is less than 180°.

[0038] This technical solution avoids the occurrence of a dead point after the connecting rod 35 and the knife handle 33 are collinear, ensuring that the slide rod 21 can be smoothly reset.

[0039] See also Figure 2 As shown, a finger groove 222 for positioning fingers is provided at the bottom of the pull handle 22.

[0040] Finger groove 222 can better position the index finger and the middle finger.

[0041] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. An adjustable bladeless intervertebral disc processor, characterized in that: It includes a tool handle, a slide rod structure installed at the axis of the tool handle and sliding along the axial direction of the tool handle, and a tool head assembly installed at the lower end of the tool handle and with an adjustable opening angle. The lower end of the slide rod structure is connected to drive the tool head assembly.

2. The adjustable bladeless intervertebral disc processor according to claim 1, characterized in that: An operating handle is arranged at the upper end of the knife handle, and the slide rod structure cooperates with the operating handle.

3. The adjustable bladeless intervertebral disc processor according to claim 2, characterized in that: A stepped hole is provided inside the tool handle, and the stepped hole includes a first hole position, a second hole position and a third hole position, and the first hole position, the second hole position and the third hole position are arranged in sequence from top to bottom. The slide rod structure includes a slide rod, and the slide rod is transitionally matched with the first hole position. A pull handle is provided at the upper end of the slide rod, and the pull handle corresponds to the operating handle. A retaining ring is provided near the lower end of the slide rod, and a spring is sleeved on the slide rod, and the spring acts between the retaining ring and the stepped surface of the stepped hole. Under the action of the spring, the slide rod moves downward, and the tool head assembly is installed at the lower end of the slide rod.

4. The adjustable bladeless intervertebral disc processor according to claim 3, characterized in that: The cutter head assembly includes two partially overlapping blades, the outer sides of the blades are provided with blade teeth, the upper ends of the blades are provided with handles, and the overlapping positions of the two blades are provided with pins. The blades rotate along the pins, and a connecting rod is rotatably provided between the handles and the slide rod. When the slide rod slides upward, the two blades rotate outward to open, and when the slide rod is reset under the action of a spring, the two blades move closer to each other and close.

5. The adjustable bladeless intervertebral disc processor according to claim 4, characterized in that: A slide groove is arranged on the inner wall of the third hole, the slide groove is arranged vertically, and the pin shaft is matched in the slide groove.

6. The adjustable bladeless intervertebral disc processor according to claim 4, characterized in that: The inner angle formed by the connecting rod and the handle is α. When the sliding rod slides upward to the limit position, α is opened to the maximum, and at this time α is less than 180°.

7. The adjustable bladeless intervertebral disc processor according to claim 3, characterized in that: The bottom of the handle is provided with a finger groove for positioning fingers.

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