Perspective lower positioning device

Abstract

A perspective lower positioning device relates to the technical field of guide positioning devices and comprises a positioning support, a rectangular sliding hole is horizontally formed in the positioning support, a sliding hoop is slidably arranged on one side of the rectangular sliding hole, an adjusting rod is slidably arranged in the sliding hoop in the vertical direction, and the positioning support is provided with a tensioning part for tensioning the sliding hoop. The adjusting rod abuts against the side wall of the positioning support for locking. According to the utility model, the problems that a developing marker of a lower positioning device in vitro needs to move up and down and left and right in the prior art, so that the distance cannot be quantified when the existing device moves up and down and left and right; and the problems that in the moving process, the structures are matched loosely, the initial position is inaccurate due to the fact that the structures slide down easily due to gravity, and the positioning accuracy is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of guiding and positioning devices, in particular to a perspective positioning device. Background Art

[0002] Minimally invasive surgery is the development trend of surgical procedures. Open surgery is becoming less and less common, while percutaneous small incision surgery is becoming more and more common. This places higher demands on the surgeon's skills, especially for punctures related to bones and intervertebral discs. The puncture point must be located on the bone surface or at a certain point in the body, and a stable and reliable device is required for puncture. In spinal surgery, surgeries that often require puncture positioning include: 1. Percutaneous screw placement surgery; 2. Transforaminal endoscopic lumbar disc surgery.

[0003] At present, percutaneous screw placement technology and percutaneous transforaminal endoscopic lumbar discectomy technology are emerging minimally invasive surgical techniques in minimally invasive spinal surgery, with the advantages of less trauma, less bleeding, faster recovery, less impact on spinal stability, and operation under local anesthesia. Safe and accurate positioning puncture is the core step of the above technology and one of the key factors that determine the difficulty of surgery and postoperative clinical effect. The puncture under the guidance of C-arm X-ray machine currently used in clinical practice cannot provide accurate parameters such as puncture position and puncture side opening angle. It can only draw lines on the body surface according to fluoroscopy, integrate limited information, puncture according to experience and adjust multiple times through fluoroscopy, which puts high demands on the surgeon's spatial thinking ability and surgical experience. Young doctors often lack good spatial imagination and clinical puncture operation experience, which leads to difficulties in positioning puncture, prolonged operation time, multiple punctures increase patient pain and increase radiation exposure of surgeons and patients, increase the risk of dural sac and nerve root damage, and even cause surgical failure. How to quickly, accurately and safely position puncture is still one of the difficulties that urgently need to be solved in clinical work.

[0004] The prior art discloses a patent with a publication number of CN220360449U, which includes a mounting frame, a horizontally sliding crossbar, a lateral measuring rod vertically slidingly inserted on the support end of the crossbar, and an anteroposterior measuring rod perpendicular to it. The anteroposterior measuring rod can also be horizontally slidably inserted on the lower end of the lateral measuring rod. The mounting frame is rotatably provided with a rotating frame arranged in parallel with the crossbar, and the rotating frame is rotatably provided with a guide seat arranged perpendicular to the rotation center. The traditional technique of endoscopic discectomy requires fluoroscopic positioning of the puncture needle point and puncture path. The current puncture is not accurate enough, the number of fluoroscopy is too many, the risk of dura mater sac and nerve root damage is increased, the operation time is prolonged, and the patient and medical staff are exposed to too much radiation, which affects their health.

[0005] As the existing technologies including the above patents are used, their shortcomings are gradually exposed, mainly in the following aspects:

[0006] First, the developing marker of the existing lower positioning device in vitro needs to be able to move up, down, left, and right, which makes it impossible to quantify the distance when the existing device is used in the process of moving up, down, left, and right.

[0007] Second, the structures of the existing lower positioning device need to be loosened and locked during the up and down movement, which makes the gaps between the structures too large. During the movement, the structures are loosely matched and easily slipped due to gravity, resulting in inaccurate initial positions, affecting the accuracy of positioning.

[0008] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0009] In view of the defects in the prior art, the utility model solves the problem that the developing marker of the lower positioning device in the traditional technology needs to be able to move up, down, left and right, which makes it impossible to quantify the distance during the use of the existing device; and the structures are loosely matched during the movement, which is easy to slip due to gravity, resulting in inaccurate initial position, affecting the accuracy of positioning.

[0010] In order to solve the above problems, the utility model provides the following technical solutions:

[0011] The perspective positioning device comprises a positioning bracket, a rectangular sliding hole is horizontally opened on the positioning bracket, a sliding hoop is slidably provided on one side of the rectangular sliding hole, an adjusting rod is vertically slidably provided inside the sliding hoop, and the positioning bracket is provided with a tensioning member for tightening the sliding hoop. When the tensioning member tightens the sliding hoop, the adjusting rod is stopped against the side wall of the positioning bracket.

[0012] As an optimized solution, the sliding hoop is provided with a sliding hole in a rectangular shape vertically, the adjusting rod is a rectangular rod, and when the tensioning member tightens the sliding hoop, part of the sliding hole is located in the rectangular sliding hole.

[0013] As an optimized solution, a tension ball is provided at one end of the sliding hole away from the positioning bracket, the tension ball abuts against the adjusting rod, and the tension ball is installed on the sliding hoop by means of an elastic component.

[0014] As an optimized solution, a guiding inclined surface is provided at a corner of the adjusting rod close to the tensioning ball, a guiding protrusion is fixedly connected to the corner of the sliding hole facing the guiding inclined surface, and the guiding protrusion abuts against the guiding inclined surface.

[0015] As an optimized solution, the elastic component includes an elastic sheet fixed on the outer wall of the sliding hoop, the elastic sheet abuts against the tensioning ball, the sliding hoop is provided with a mounting hole, and the tensioning ball is constrained in the mounting hole.

[0016] As an optimized solution, the elastic sheet is arranged in a flat plate shape.

[0017] As an optimized solution, the tensioning member includes a sliding protrusion section on the end face opposite to the elastic sheet, the sliding protrusion section is slidably constrained in the rectangular sliding hole, a threaded groove is provided on the sliding protrusion section, and an adjusting knob connected to the threaded groove is provided on the other side of the rectangular sliding hole, and the handle end of the adjusting knob is abutted against the side wall of the positioning bracket.

[0018] As an optimized solution, a mounting groove connected to the mounting hole is provided on the outer wall of the sliding hoop, and an insertion groove is provided on the opposite side wall of the mounting groove, and both ends of the elastic sheet are respectively inserted into the insertion grooves.

[0019] As an optimized solution, the positioning bracket is provided with a first scale line along the extension direction of the rectangular sliding hole.

[0020] As an optimized solution, the adjusting rod is provided with a second scale line in the vertical direction.

[0021] As an optimized solution, the upper end of the adjusting rod is connected to the positioning structure body.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] Since the tensioning ball utilizes the elastic force of the elastic sheet, the tensioning ball is always in a state of being in contact with the adjusting rod. When the adjusting knob is gradually loosened from tightening, the tensioning ball gradually enters the sliding hole under the push of the elastic sheet and pushes the adjusting rod forward. At this time, the adjusting rod and the side wall of the positioning bracket are in close contact. The reaction force will make the sliding hoop gradually move away from the rectangular sliding groove, and the sliding protrusion section of the sliding hoop will exit the rectangular sliding hole. That is to say, this structural design will allow the thicker part of the sliding protrusion section to automatically exit the rectangular sliding hole under the action of the elastic sheet when the adjusting knob is loosened, so as to facilitate the subsequent left and right movement without the need for additional actions to make it exit.

[0024] When the adjusting rod is inserted, the tension ball and the adjusting rod will be squeezed, and resistance will be generated when sliding up and down. When this force is greater than the gravity of the adjusting rod, the adjusting rod will not slide down by itself, avoiding interference with the quantized distance.

[0025] A guide protrusion is set at a corner of the sliding hole away from the rectangular sliding hole, and a corresponding guide inclined surface is set at the corresponding position of the adjusting rod. Because the front-to-back length of the adjusting rod is smaller than the front-to-back length of the sliding hole, when the adjusting knob is tightened, when the adjusting rod hits the side wall of the positioning bracket, the adjusting knob is tightened, and the positioning protrusion will press the positioning inclined surface, which will press the adjusting rod forward and laterally. The adjusting rod will move diagonally along the tightening direction of the positioning protrusion, so that there is no gap in the front-to-back direction and the left-to-right direction of the adjusting rod and it is squeezed tightly. The adjusting rod will reach a very stable state, and the accuracy of the entire device will be very high.

[0026] The positioning bracket and the adjustment rod are both scaled, which can quantify the moving distance, making it more convenient;

[0027] To sum up the above structure, when it is necessary to adjust up, down, left, and right, the adjusting knob is slightly loosened. Under the action of the elastic sheet, the sliding hoop will retreat a small distance. Under the action of the elastic sheet, the tightening ball will always be in a tightening state against the sliding rod. At the same time, the sliding protrusion section can be used to slide left and right in the rectangular sliding hole to adjust the horizontal position of the adjusting rod. Since the tightening force of the elastic sheet is greater than the gravity of the adjusting rod, the adjusting rod will not slide down by itself. At the same time, external manpower can be used to adjust the up and down height of the adjusting rod. It is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0029] Figure 1 It is a schematic diagram of the structure of the utility model;

[0030] Figure 2 It is a structural schematic diagram of the first scale line and the second scale line of the utility model.

[0031] In the figure: 1-positioning bracket; 2-rectangular sliding hole; 3-sliding hoop; 4-adjusting rod; 5-sliding protrusion section; 6-adjusting knob; 7-threaded groove; 8-tensioning ball; 9-elastic sheet; 10-installation groove; 11-insertion groove; 12-first scale line; 13-second scale line; 14-positioning structure body; 15-sliding hole. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0033] like Figure 1 and Figure 2 As shown, the perspective positioning device includes a positioning bracket 1, a rectangular sliding hole 2 is horizontally opened on the positioning bracket 1, a sliding hoop 3 is slidably provided on one side of the rectangular sliding hole 2, an adjusting rod 4 is vertically slidably provided inside the sliding hoop 3, and the positioning bracket 1 is provided with a tensioning member for tightening the sliding hoop 3. When the tensioning member tightens the sliding hoop 3, the adjusting rod 4 is stopped against the side wall of the positioning bracket 1.

[0034] The sliding hoop 3 is vertically provided with a rectangular sliding hole 15 . The adjusting rod 4 is a rectangular rod. When the tensioning member tightens the sliding hoop 3 , part of the sliding hole 15 is located in the rectangular sliding hole 2 .

[0035] A tension ball 8 is disposed at one end of the sliding hole 15 away from the positioning bracket 1 . The tension ball 8 abuts against the adjusting rod 4 . The tension ball 8 is mounted on the sliding hoop 3 by means of an elastic component.

[0036] A guiding inclined surface is provided at one corner of the adjusting rod 4 close to the tensioning ball 8 , and a guiding protrusion is fixedly connected to the corner of the sliding hole 15 facing the guiding inclined surface, and the guiding protrusion abuts against the guiding inclined surface.

[0037] The elastic component includes an elastic sheet 9 fixed on the outer wall of the sliding hoop 3. The elastic sheet 9 abuts against the tensioning ball 8. The sliding hoop 3 is provided with a mounting hole, and the tensioning ball 8 is constrained in the mounting hole.

[0038] The elastic sheet 9 is arranged in a flat plate shape.

[0039] The tensioning member includes a sliding protrusion section 5 on the end face opposite to the elastic sheet 9. The sliding protrusion section 5 is slidably constrained in the rectangular sliding hole 2. A threaded groove 7 is provided on the sliding protrusion section 5. An adjusting knob 6 connected to the threaded groove 7 is provided on the other side of the rectangular sliding hole 2. The handle end of the adjusting knob 6 abuts against the side wall of the positioning bracket 1.

[0040] The sliding protrusion section 5 is provided with a stepped surface on the surface in contact with the rectangular sliding hole 2. The thickness of one end of the sliding protrusion section 5 close to the thread groove 7 is less than the thickness of the other end. The part of the sliding protrusion section 5 with a larger thickness is the same as the thickness of the rectangular sliding hole 2. The purpose of this design is that when the adjusting knob 6 tightens the sliding protrusion section 5, the thicker part will be stuck in the rectangular sliding hole 2. Due to the same thickness, shaking can be prevented. When the adjusting knob 6 is loosened, the thicker part will be pulled out of the rectangular sliding hole 2 under the action of the elastic sheet 9, so as to facilitate the horizontal sliding of the sliding protrusion section 5.

[0041] The length of the sliding protrusion section 5 at the part with larger thickness is 0.1-1 mm.

[0042] An installation groove 10 communicating with the installation hole is formed on the outer wall of the sliding hoop 3 , and an insertion groove 11 is formed on the opposite side wall of the installation groove 10 . Both ends of the elastic sheet 9 are respectively inserted into the insertion groove 11 .

[0043] The positioning bracket 1 is provided with a first scale line 12 along the extending direction of the rectangular sliding hole 2 .

[0044] The adjusting rod 4 is provided with a second scale line 13 in the vertical direction.

[0045] The upper end of the adjusting rod 4 is connected to the positioning structure body 14 .

[0046] The working principle of this device is:

[0047] Since the tensioning ball 8 utilizes the elastic force of the elastic sheet 9, the tensioning ball 8 is always in a state of being in contact with the adjusting rod 4. When the adjusting knob 6 is gradually loosened from being tightened, the tensioning ball 8 gradually enters the sliding hole 15 under the push of the elastic sheet 9 and pushes the adjusting rod 4 forward. At this time, the adjusting rod 4 is in close contact with the side wall of the positioning bracket 1. The reaction force will make the sliding hoop 3 gradually move away from the rectangular sliding groove, and the sliding protrusion section 5 of the sliding hoop 3 will exit the rectangular sliding hole 2. That is to say, this structural design will allow the thicker part of the sliding protrusion section to automatically exit the rectangular sliding hole under the action of the elastic sheet 9 when the adjusting knob 6 is loosened, so as to facilitate the subsequent left and right movement without having to use additional actions to make it exit;

[0048] When the adjusting rod 4 is inserted, the tensioning ball 8 and the adjusting rod 4 will be squeezed, and resistance will be generated when sliding up and down. When this force is greater than the gravity of the adjusting rod 4, the adjusting rod 4 will not slide down by itself, avoiding interference with the quantized distance.

[0049] A guide protrusion is set at a corner of the sliding hole 15 away from the rectangular sliding hole 2, and a corresponding guide inclined surface is set at the corresponding position of the adjusting rod 4. Because the front-to-back length of the adjusting rod 4 is smaller than the front-to-back length of the sliding hole 15, when the adjusting knob 6 is tightened, when the adjusting rod 4 hits the side wall of the positioning bracket 1, the adjusting knob 6 is tightened continuously, and the positioning protrusion will press the positioning inclined surface, which will press the adjusting rod 4 forward and laterally, and the adjusting rod 4 will move diagonally along the tightening direction of the positioning protrusion, so that there is no gap in the front-to-back direction and the left-to-right direction of the adjusting rod 4 and it is squeezed tightly, and the adjusting rod 4 will reach a very stable state, and the accuracy of the entire device will be very high.

[0050] The positioning bracket 1 and the adjusting rod 4 are both scaled, which can quantify the moving distance, which is more convenient;

[0051] In summary, when it is necessary to adjust up, down, left, or right, the adjusting knob 6 is slightly loosened. Under the action of the elastic sheet 9, the sliding hoop 3 will retreat a small distance. Under the action of the elastic sheet 9 and the tightening ball 8, the sliding rod will always be in a tightened state. At the same time, the sliding protrusion section 5 can be used to slide left and right in the rectangular sliding hole 2 to adjust the horizontal position of the adjusting rod 4. Since the tightening force of the elastic sheet 9 is greater than the gravity of the adjusting rod 4, the adjusting rod 4 will not slide down by itself. At the same time, external manpower can be added to adjust the upper and lower heights of the adjusting rod 4. It is convenient and quick.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A positioning device under perspective, characterized in that: The invention comprises a positioning bracket (1), wherein a rectangular sliding hole (2) is horizontally opened on the positioning bracket (1), a sliding hoop (3) is slidably provided on one side of the rectangular sliding hole (2), an adjusting rod (4) is vertically slidably provided inside the sliding hoop (3), and the positioning bracket (1) is provided with a tensioning member for tightening the sliding hoop (3), and when the tensioning member tightens the sliding hoop (3), the adjusting rod (4) abuts against the side wall of the positioning bracket (1) to stop.

2. The perspective positioning device according to claim 1, characterized in that: The sliding hoop (3) is provided with a sliding hole (15) in a rectangular shape in the vertical direction, the adjusting rod (4) is a rectangular rod, and when the tensioning member tightens the sliding hoop (3), part of the sliding hole (15) is located in the rectangular sliding hole (2).

3. The perspective positioning device according to claim 1, characterized in that: A tensioning ball (8) is provided at one end of the sliding hole (15) away from the positioning bracket (1), the tensioning ball (8) abuts against the adjusting rod (4), and the tensioning ball (8) is mounted on the sliding hoop (3) by means of an elastic component.

4. The perspective positioning device according to claim 1, characterized in that: The adjusting rod (4) is provided with a guiding inclined surface at a corner close to the tensioning ball (8), and the sliding hole (15) is fixedly connected with a guiding protrusion at the corner facing the guiding inclined surface, and the guiding protrusion abuts against the guiding inclined surface.

5. The perspective positioning device according to claim 3, characterized in that: The elastic component comprises an elastic sheet (9) fixed on the outer wall of the sliding hoop (3), the elastic sheet (9) abuts against the tensioning ball (8), the sliding hoop (3) is provided with a mounting hole, and the tensioning ball (8) is constrained in the mounting hole.

6. The perspective positioning device according to claim 5, characterized in that: The elastic sheet (9) is arranged in a flat plate shape.

7. The perspective positioning device according to claim 5, characterized in that: The tensioning member comprises a sliding protrusion section (5) on the end surface opposite to the elastic sheet (9), the sliding protrusion section (5) is slidably constrained in the rectangular sliding hole (2), a thread groove (7) is provided on the sliding protrusion section (5), and an adjusting knob (6) connected to the thread groove (7) is provided on the other side of the rectangular sliding hole (2), and the handle end of the adjusting knob (6) abuts against the side wall of the positioning bracket (1).

8. The perspective positioning device according to claim 7, characterized in that: The sliding protrusion section (5) is provided with a stepped surface on the surface in contact with the rectangular sliding hole (2); the thickness of one end of the sliding protrusion section (5) close to the thread groove (7) is smaller than the thickness of the other end; the thickness of the sliding protrusion section (5) at a portion with a larger thickness is the same as the thickness of the rectangular sliding hole (2).

9. The perspective positioning device according to claim 5, characterized in that: The outer wall of the sliding hoop (3) is provided with a mounting groove (10) which is connected with the mounting hole, and the opposite side wall of the mounting groove (10) is provided with an insertion groove (11), and the two ends of the elastic sheet (9) are respectively inserted into the insertion groove (11).

10. The perspective positioning device according to claim 1, characterized in that: The positioning bracket (1) is provided with a first scale line (12) along the extension direction of the rectangular sliding hole (2), and the adjusting rod (4) is provided with a second scale line (13) along the vertical direction.

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