An adjustable distractor

Abstract

The utility model discloses an adjustable dilator, including base, the base top is fixed with stand, a plurality of expansion frames are arranged at the top of stand, the expansion frame head -tail connection forms the expansion frame of shape changeable, be provided with the expansion board card of multidirectional adjustment on the expansion frame, the stand is fixedly connected with one of expansion frame, the expansion frame includes the toothed rod, one end of toothed rod is rotatably provided with the cooperation rod, the cooperation rod is rotatably connected with other toothed rod, buckle structure is arranged between toothed rod and cooperation rod, toothed rod is fixedly connected with the stand, adopts the structural design of expansion frame, realized the multi -shape change of expansion frame, and the expansion area of different shape is convenient for adaptation, and the dilator is used in operation, and the region such as incision that needs to expand is dilated.

Description

Technical Field

[0001] This utility model relates to the field of expander technology, specifically an adjustable expander. Background Technology

[0002] Currently, the expanders used in clinical surgery have the following limitations: First, the direction is fixed: the angle of the expansion plate of the traditional expander is fixed, and it cannot be flexibly adjusted according to the anatomical structure of the surgical site (such as deep tissues or narrow cavities), resulting in insufficient exposure of the surgical area and affecting the operating field of vision.

[0003] Second, the shape is limited: the overall structure of the expander is fixed and cannot be manually adjusted according to the shape and size of the surgical incision and the extent of tissue expansion, resulting in poor applicability.

[0004] Third, limited flexibility: the expansion board's expansion direction and range are fixed, making it impossible to precisely control the extent of tissue expansion.

[0005] Extensive research has been conducted on this topic. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an adjustable spreader that can solve the problems in the prior art.

[0007] This utility model is achieved through the following technical solution: An adjustable expander of this utility model includes a base, a column fixed to the top of the base, a plurality of expansion frames provided on the top of the column, the expansion frames being connected end to end to form an expansion frame with a variable shape, an expansion plate that can be adjusted in multiple directions provided on the expansion frame, and the column being fixedly connected to one of the expansion frames.

[0008] In a further technical solution, the expansion frame includes a toothed rod, one end of which is rotatably provided with a mating rod. The mating rod is rotatably connected to other toothed rods. A snap-fit ​​structure is provided between the toothed rod and the mating rod. The toothed rod is fixedly connected to the column.

[0009] A further technical solution includes a snap-fit ​​structure comprising a toothed block fixed to the top of the toothed rod, an inner cavity provided within the mating rod, the toothed block located within the inner cavity, the toothed block being rotatably connected to the mating rod, and a snap-fit ​​provided within the mating rod for snapping and fixing the toothed block.

[0010] In a further technical solution, a connecting shaft is fixed inside the inner cavity, the buckle is rotatably disposed on the outer surface of the connecting shaft, a locking block is fixed on one side of the buckle, the locking block engages the toothed block, and a spring-roller assembly is also provided inside the mating rod to press the buckle.

[0011] A further technical solution includes a spring ball assembly comprising an inner groove communicating with the inner cavity, a ball being slidably disposed within the inner groove, a compression spring being elastically connected between the ball and the inner groove, and a protrusion fixed to the outer surface of the buckle, the protrusion abutting against the ball.

[0012] In a further technical solution, the expansion plate includes an integrated gear box, the toothed rod slides through the integrated gear box, a first transmission structure is provided inside the integrated gear box to adjust the sliding of the integrated gear box relative to the toothed rod, a telescopic rod is slidably provided inside the integrated gear box, the end of the telescopic rod is fixed to the expansion plate body structure, and a second transmission structure is provided inside the integrated gear box to adjust the telescopic rod to extend or retract.

[0013] A further technical solution includes a first transmission structure comprising a first gear rotatably disposed within the integrated gearbox, the first gear meshing with the teeth on the side of the toothed rod, a first worm rotatably disposed within the integrated gearbox, the first worm meshing with the first gear, a second bevel gear fixed to the end of the first gear, a first bevel gear meshing with one side of the second bevel gear, and a first rotating shaft fixed to the top of the first bevel gear, the first rotating shaft rotatably passing through the top of the integrated gearbox.

[0014] A further technical solution includes a second transmission structure comprising a rotating shaft rotatably disposed within an integrated gearbox, a second worm gear fixed to the outer surface of the rotating shaft, a second gear rotatably disposed within the integrated gearbox, the second gear meshing with the second worm gear and the top teeth of the telescopic rod, a fourth bevel gear fixed to one side of the second worm gear, a third bevel gear meshing with one side of the fourth bevel gear, a second rotating shaft fixed to the top of the third bevel gear, and the second rotating shaft rotatably passing through the top of the integrated gearbox.

[0015] A further technical solution includes an expansion board body structure comprising a guide rail fixed to one side of a telescopic rod, a board mounted rotatably on the upper side of the telescopic rod, and a locking nut assembly between the board and the guide rail.

[0016] A further technical solution includes a locking nut assembly, wherein an arc-shaped groove is provided in the guide rail, and the screw portion of the locking nut passes through the arc-shaped groove and is threadedly connected to the plate.

[0017] The beneficial effects of this utility model are: First, by adopting the structural design of the expansion frame, the expansion frame can be transformed into multiple shapes, which is convenient to adapt to expansion areas of different shapes. This expander is used in surgery to expand areas that need to be expanded, such as incisions.

[0018] Second, the expansion frame is also equipped with a snap-fit ​​structure to fix the frame after the shape changes, so as to maintain the shape of the expander.

[0019] Third, the expansion plate is slidably mounted on the expansion frame. By setting up a first transmission structure and a second transmission structure, the plate can be extended and retracted in two directions. The plate can also swing around the hinge axis to provide more adjustment margin in the vertical direction, so that the plate can be more accurately engaged with the expansion area, improve the opening effect, and adapt to the angle requirements of complex surgical areas such as deep and lateral areas.

[0020] IV. The conical silicone-edged base and titanium alloy column improve the support stability of the spreader.

[0021] Fifth, the meshing of the first worm and the first gear, as well as the meshing of the second worm and the second gear, form a worm and gear transmission structure (possessing the self-locking characteristic of worm transmission). This can prevent positional displacement caused by the reaction force of the surgical area tissue after adjustment, thereby achieving the function of maintaining the locking after the integrated gear box, toothed rod, and integrated gear box and telescopic rod have slid and adjusted, so as to keep the opening position of the spreader unchanged. Attached Figure Description

[0022] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of an adjustable expander according to the present invention; Figure 2 for Figure 1 A schematic diagram at point A in the middle; Figure 3 for Figure 2 A schematic diagram at point B in the middle; Figure 4 for Figure 2 A schematic diagram at point C in the middle; Figure 5 for Figure 1 A bottom-view sectional view of the central support structure; Figure 6 for Figure 5 A schematic diagram at point D in the middle; Figure 7 for Figure 1 Schematic diagram of the structure of the central expander; Figure 8 for Figure 7 A schematic diagram at point E in the middle; In the figure, the components are: expansion frame 101, expansion plate 102, column 103, base 104, toothed rod 201, buckle 202, mating rod 203, telescopic rod 301, integrated gear box 302, locking bolt 303, guide rail 304, locking nut 305, plate 306, hinge shaft 401, first rotating shaft 402, second rotating shaft 403, toothed block 501, inner cavity 502, locking block 503, connecting shaft 504, protrusion 505, compression spring 506, inner groove 507, ball bearing 508, first bevel gear 601, second bevel gear 602, first worm gear 603, first gear 604, second gear 605, second worm gear 606, fourth bevel gear 607, third bevel gear 608, and rotating shaft 609. Detailed Implementation

[0024] like Figures 1-8 As shown, this utility model will be described in detail. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The projected directions are consistent in all directions. This utility model provides an adjustable extender, which includes a base 104 and a column 103 fixed on the top of the base 104. The column 103 is characterized by having multiple expansion frames 101 on its top. The expansion frames 101 are connected end to end to form an expansion frame with various shapes. The expansion frames 101 are provided with multi-directional adjustable expansion plates 102. The column 103 is fixedly connected to one of the expansion frames 101.

[0025] Beneficially, the base 104 adopts a conical structure design, with the base material being medical-grade metal (such as stainless steel) and the outer surface covered with medical-grade silicone. The conical structure can increase the contact area, and the medical-grade silicone can increase the friction. The combination of the two makes the device more stable and avoids sliding displacement during surgery.

[0026] Advantageously, the column 103 can be made of medical titanium alloy hollow rod, with one end fixedly connected to the base 104 and the other end fixedly connected to the toothed rod 201 of the expansion frame 101; it can not only support the expansion frame 101 and transmit mechanical loads, but also reduce the overall weight and improve the ease of operation through the hollow structure.

[0027] Advantageously, the expansion frame 101 includes a toothed rod 201, one end of which is rotatably provided with a mating rod 203 located above it. The mating rod 203 is rotatably connected to other toothed rods 201. A snap-fit ​​structure is provided between the toothed rod 201 and the mating rod 203. The toothed rod 201 is fixedly connected to the column 103.

[0028] Advantageously, the snap-fit ​​structure includes a toothed block 501 fixed to the top of the toothed rod 201, an inner cavity 502 is provided inside the mating rod 203, the toothed block 501 is located in the inner cavity 502, the toothed block 501 is rotatably connected to the mating rod 203, and a snap-fit ​​202 is provided inside the mating rod 203 to snap and fix the toothed block 501.

[0029] Advantageously, a rotating shaft is provided inside the mating rod 203, and the rotating shaft is rotatably connected to the toothed block 501.

[0030] Advantageously, a connecting shaft 504 is fixed inside the inner cavity 502, and a buckle 202 is rotatably disposed on the outer surface of the connecting shaft 504. A buckle block 503 is fixed on one side of the buckle 202, and the buckle block 503 engages the toothed block 501. A spring-roller assembly that presses the buckle 202 is also provided inside the mating rod 203.

[0031] Advantageously, the spring-ball assembly includes an inner groove 507 communicating with the inner cavity 502. A ball 508 is slidably disposed within the inner groove 507. A compression spring 506 is elastically connected between the ball 508 and the inner groove 507. One end of the compression spring 506 is fixed to the inner groove 507, and the other end is fixed to the ball 508. A protrusion 505 is also fixed to the outer surface of the latch 202. The protrusion 505 abuts against the ball 508. After the latch 202 is rotated toward the toothed block 501, the latch 503 disengages from the toothed block 501, and then the protrusion 505 pushes the ball 508. When retracted into the inner groove 507, the toothed rod 201 and the mating rod 203 can be rotated and adjusted to form different included angles. After the latch 202 is released, the compression spring 506 pushes the ball 508 to engage with the protrusion 505, and the latch block 503 re-engages with the toothed block 501. If the toothed rod 201 tends to rotate relative to the mating rod 203, the protrusion 505 is engaged by the ball 508, and the compression spring 506 generates the opposite elastic force to counteract this tendency. Therefore, the toothed rod 201 and the mating rod 203 can be kept relatively fixed when the latch 202 is not operated.

[0032] Advantageously, the expansion plate 102 includes an integrated gear box 302, a toothed rod 201 slides through the integrated gear box 302, a first transmission structure is provided inside the integrated gear box 302 to adjust the integrated gear box 302 relative to the toothed rod 201, a telescopic rod 301 is slidably provided in the integrated gear box 302, an expansion plate body structure is fixed at the end of the telescopic rod 301, and a second transmission structure is provided inside the integrated gear box 302 to adjust the telescopic rod 301.

[0033] Advantageously, the first transmission structure includes a first gear 604 rotatably disposed within the integrated gearbox 302, the first gear 604 meshing with the teeth on the side of the toothed rod 201; a first worm 603 rotatably disposed within the integrated gearbox 302, the first worm 603 meshing with the first gear 604; a second bevel gear 602 fixed to the end of the first gear 604; a first bevel gear 601 meshing with one side of the second bevel gear 602; and a first rotating shaft 4 fixed to the top of the first bevel gear 601. 02. The first rotating shaft 402 rotates through the top of the integrated gear box 302. The top of the first rotating shaft 402 is provided with a hexagonal hole. A hexagonal wrench is used to engage the top of the first rotating shaft 402 to make the first rotating shaft 402 rotate. After the first rotating shaft 402 rotates, through the transmission of the first bevel gear 601, the second bevel gear 602, the first worm gear 603 and the first gear 604, the first gear 604 meshes with the toothed rod 201, and the integrated gear box 302 slides and adjusts relative to the toothed rod 201.

[0034] Advantageously, the second transmission structure includes a rotating shaft 609 rotatably disposed within the integrated gearbox 302. A second worm gear 606 is fixed to the outer surface of the rotating shaft 609. A second gear 605 is rotatably disposed within the integrated gearbox 302. The second gear 605 meshes with the second worm gear 606 and the top teeth of the telescopic rod 301. A fourth bevel gear 607 is fixed to one side of the second worm gear 606. A third bevel gear 608 meshes with one side of the fourth bevel gear 607. A [missing information - likely a component or material] is fixed to the top of the third bevel gear 608. The second rotating shaft 403 rotates through the top of the integrated gear box 302. The top of the second rotating shaft 403 is provided with a hexagonal hole. A hexagonal wrench is used to engage the top of the second rotating shaft 403 to make the second rotating shaft 403 rotate. Through the transmission of the third bevel gear 608, the fourth bevel gear 607, and the second worm gear 606, the second gear 605 is rotated. Since the second gear 605 meshes with the top teeth of the telescopic rod 301, it also drives the telescopic rod 301 to move telescopically within the integrated gear box 302.

[0035] Advantageously, the expansion plate body structure includes a guide rail 304 fixed to one side of the telescopic rod 301, a hinge shaft 401 provided at the end of the telescopic rod 301, a plate 306 rotatably provided on the upper side of the telescopic rod 301, the plate 306 being rotatably connected to the telescopic rod 301 through the hinge shaft 401, and a locking nut assembly provided between the plate 306 and the guide rail 304.

[0036] Advantageously, the telescopic rod 301 and the toothed rod 201 can be equipped with scales, so that personnel can clearly know the specific value of the change in their telescopic length. The guide rail 304 can also be equipped with arc-shaped degree scales. The scale accuracy of the telescopic rod 301 is 1mm, which can realize 1mm-level telescopic adjustment. The angle adjustment accuracy of the plate 306 is 1°, which can meet the fine opening requirements of different surgical areas.

[0037] Advantageously, the locking nut assembly includes a locking nut 305, and an arc groove is provided in the guide rail 304. The screw part of the locking nut 305 passes through the arc groove and is threadedly connected to the plate 306, so that the locking nut 305 presses against the guide rail 304 and keeps the angle of the plate 306 unchanged.

[0038] Beneficially, board 306 has an L-shaped structure.

[0039] The expander is formed by multiple expansion frames 101 connected end to end to form a frame structure. Each expansion frame 101 is equipped with toothed rods 201 and mating rods 203 that can be adjusted at their angles. Through the above structural design, the expansion frames 101 can form frames of various shapes, such as rectangles, polygons or irregular shapes, to facilitate adaptation to different expansion ranges. Since the expansion plate 306 is slidably set on the expansion frame 101, it also has the function of multi-directional adjustment, which increases the area it can adapt to for expansion.

[0040] When adjusting the expansion frame 101, the operator presses the latch 202 to disengage it from the toothed block 501. Since the toothed block 501 is fixed to the toothed rod 201, and the mating rod 203 is rotatably connected to the toothed block 501, the mating rod 203 can rotate around the toothed rod 201 after the latch 202 disengages, thus achieving angle adjustment between the toothed rod 201 and the mating rod 203. After the angle adjustment is complete, releasing the latch 202 causes it to reset and re-engage with the toothed block 501, maintaining the engagement between the toothed rod 201 and the mating rod 203.

[0041] The adjustment of the orientation of the expansion plate 102 is divided into two adjustments: one is the adjustment of the position of the integrated gear box 302 relative to the toothed rod 201, and the other is the adjustment of the position of the telescopic rod 301 relative to the integrated gear box 302. A hexagonal wrench is inserted into the hexagonal hole at the top of the first rotating shaft 402. Turning the wrench clockwise or counterclockwise transmits power through the first bevel gear 601, the second bevel gear 602, and the first worm gear 603 to the first gear 604, causing the integrated gear box 302 to slide smoothly along the toothed rod 20. After rotating the second rotating shaft 403, the second gear 605 rotates through the transmission of the third bevel gear 608, the fourth bevel gear 607, and the second worm gear 606. Since the second gear 605 meshes with the top teeth of the telescopic rod 301, it also causes the telescopic rod 301 to extend and retract within the integrated gear box 302.

[0042] The plate 306 can be rotated and adjusted. The plate 306 can be adjusted from 0 to 45 degrees around the hinge axis 401 to meet the lateral expansion requirements of deep surgical areas. When adjusting, first loosen the locking nut 305, observe the angle scale through the arc groove of the guide rail 304, rotate the plate 306 to the target angle and then tighten it to ensure that the contact area between the plate and the tissue is maximized and reduce local tissue pressure.

[0043] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the protection scope of this utility model; therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An adjustable expander, comprising a base (104), a column (103) fixed to the top of the base (104), a plurality of expansion frames (101) provided on the top of the column (103), the expansion frames (101) being connected end to end to form an expansion frame with a variable shape, an expansion plate (102) that can be adjusted in multiple directions provided on the expansion frame (101), and the column (103) being fixedly connected to one of the expansion frames (101).

2. The adjustable expander according to claim 1, characterized in that: The expansion frame (101) includes a toothed rod (201), one end of which is rotatably provided with a mating rod (203). The mating rod (203) is rotatably connected to other toothed rods (201). A snap-fit ​​structure is provided between the toothed rod (201) and the mating rod (203). The toothed rod (201) is fixedly connected to the column (103).

3. An adjustable expander according to claim 2, characterized in that: The snap-fit ​​structure includes a toothed block (501) fixed to the top of the toothed rod (201), an inner cavity (502) provided in the mating rod (203), the toothed block (501) located in the inner cavity (502), the toothed block (501) and the mating rod (203) being rotatably connected, and a snap-fit ​​(202) provided in the mating rod (203) to snap and fix the toothed block (501).

4. An adjustable expander according to claim 3, characterized in that: A connecting shaft (504) is fixed inside the inner cavity (502). The buckle (202) is rotatably disposed on the outer surface of the connecting shaft (504). A locking block (503) is fixed on one side of the buckle (202). The locking block (503) engages the toothed block (501). A spring-roller assembly that presses the buckle (202) is also provided inside the mating rod (203).

5. An adjustable expander according to claim 4, characterized in that: The spring ball assembly includes an inner groove (507) communicating with the inner cavity (502), a ball (508) is slidably disposed in the inner groove (507), a compression spring (506) is elastically connected between the ball (508) and the inner groove (507), and a protrusion (505) is fixed on the outer surface of the buckle (202), the protrusion (505) abutting against the ball (508).

6. An adjustable expander according to any one of claims 2-5, characterized in that: The expansion plate (102) includes an integrated gear box (302), through which the toothed rod (201) slides. The integrated gear box (302) is provided with a first transmission structure that allows the integrated gear box (302) to slide relative to the toothed rod (201). A telescopic rod (301) is slidably provided in the integrated gear box (302), and the end of the telescopic rod (301) is fixed with the expansion plate body structure. The integrated gear box (302) is provided with a second transmission structure that allows the telescopic rod (301) to extend and retract.

7. An adjustable expander according to claim 6, characterized in that: The first transmission structure includes a first gear (604) rotatably disposed within the integrated gearbox (302), the first gear (604) meshing with the teeth on the side of the toothed rod (201), a first worm (603) rotatably disposed within the integrated gearbox (302), the first worm (603) meshing with the first gear (604), a second bevel gear (602) fixed to the end of the first gear (604), a first bevel gear (601) meshing with one side of the second bevel gear (602), and a first rotating shaft (402) fixed to the top of the first bevel gear (601), the first rotating shaft (402) rotatably passing through the top of the integrated gearbox (302).

8. An adjustable expander according to claim 6, characterized in that: The second transmission structure includes a rotating shaft (609) rotatably disposed within an integrated gearbox (302). A second worm (606) is fixed to the outer surface of the rotating shaft (609). A second gear (605) is rotatably disposed within the integrated gearbox (302). The second gear (605) meshes with the second worm (606) and the top teeth of the telescopic rod (301). A fourth bevel gear (607) is fixed to one side of the second worm (606). A third bevel gear (608) meshes with one side of the fourth bevel gear (607). A second rotating shaft (403) is fixed to the top of the third bevel gear (608). The second rotating shaft (403) rotatably passes through the top of the integrated gearbox (302).

9. An adjustable expander according to claim 6, characterized in that: The expansion plate body structure includes a guide rail (304) fixed to one side of the telescopic rod (301), and a plate (306) is rotatably mounted on the upper side of the telescopic rod (301). A locking nut assembly is provided between the plate (306) and the guide rail (304).

10. An adjustable expander according to claim 9, characterized in that: The locking nut assembly includes a locking nut (305), and an arc groove is provided in the guide rail (304). The screw part of the locking nut (305) passes through the arc groove and is threadedly connected to the plate (306).

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