Knee arthroscope joint dilator for orthopedics department

Abstract

The utility model belongs to the technical field of joint distraction devices, and particularly relates to an orthopedic knee arthroscope joint distraction device which comprises a fixed shell and a joint distraction assembly arranged in the fixed shell. The joint opening assembly comprises a rack plate movably connected to the interior of the fixed shell, a movable rod arranged at the top end of the rack plate and extending to the top of the fixed shell, and two gears symmetrically arranged on the two sides of the rack plate and engaged with the rack plate. The distraction rods are arranged at the bottom ends of the two gears respectively, the through grooves are symmetrically formed in the two sides of the fixed shell and used for the distraction rods to move, and an assembly used for positioning the movable rods is arranged at the top end of the fixed shell. The joint distraction assembly is arranged in the fixing shell, the affected part of the joint can be stably distraction, the distraction width of the joint can be adjusted, the distraction rod can be kept in the stable distraction state of the affected part, medical staff can conveniently observe and treat the affected part, and the device is high in use flexibility, reasonable in structure and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of joint spreaders, and in particular relates to an orthopedic knee arthroscopy joint spreader. Background Art

[0002] Arthroscopy is a standard orthopedic technique. Doctors use arthroscopes and special minimally invasive surgical instruments to make some surgeries minimally invasive. Arthroscopy can be used on many joints such as the knee, hip, shoulder, ankle, elbow, wrist, etc. Knee arthroscopy is currently the most widely used and has the widest range of indications. However, the existing expander structure is relatively cumbersome, inconvenient to use, and has poor stability, making it difficult to ensure stability during surgery, making it difficult to maintain a stable joint expansion state, and at the same time, it is impossible to achieve flexible adjustment of the structure, making it difficult to adjust the width of the joint expansion, resulting in inflexible and inapplicable use. Utility Model Content

[0003] In view of the above problems, the purpose of the present utility model is to provide an orthopedic knee arthroscopy joint spreader to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the technical solution adopted by the utility model is: an orthopedic knee arthroscopy joint spreader, comprising a fixed shell and a joint spread assembly arranged inside the fixed shell, the joint spread assembly comprising a rack plate movably connected inside the fixed shell, a movable rod arranged at the top of the rack plate and extending to the top of the fixed shell, two gears symmetrically arranged on both sides of the rack plate and meshing with the rack plate, spread rods respectively arranged at the bottom ends of the two gears, and through grooves symmetrically opened on both sides of the fixed shell and used for the movement of the spread rods, and a component for positioning the movable rod is arranged at the top of the fixed shell.

[0005] The beneficial effects of the utility model are as follows: by arranging a joint distraction assembly in a fixed shell, not only can the affected part of the joint be distracted stably, the width of the joint distraction can be adjusted, but the distraction rod can also maintain the affected part in a stable distracted state, which is convenient for medical staff to observe and treat. The device is highly flexible in use, has a reasonable structure, and is easy to use.

[0006] In order to limit the movable rod after the joint is stretched:

[0007] As a further improvement of the above technical solution: the component for positioning the movable rod includes a fixed rod symmetrically arranged on both sides of the movable rod and evenly provided with multiple limit grooves, a through groove opened on the top of the fixed shell for the movable rod to pass through, a surrounding plate arranged on the outside of the movable rod, a sliding rod symmetrically slidably connected on both sides of the surrounding plate, and a limit tooth arranged on one end of the sliding rod close to the fixed rod and adapted to the limit groove.

[0008] The beneficial effect of this improvement is: after the joint is opened, the sliding rod is slid along the enclosure plate, driving the limiting tooth to be inserted into the limiting groove to limit the movable rod, thereby limiting the position of the rack plate, so that the opening rod maintains the state of opening the joint.

[0009] In order to ensure that the limiting teeth are stably stuck in the limiting groove to maintain the limiting position of the movable rod:

[0010] As a further improvement of the above technical solution: a baffle is provided on one side of the slide rod close to the limiting tooth, and a spring is connected to the outer wall of the slide rod and located between the baffle and the enclosure.

[0011] The beneficial effect of this improvement is that when the movable rod is limited, the elastic action of the spring can prevent the slide bar from slipping off the enclosure plate, so that the limiting tooth can be stably stuck in the limiting groove.

[0012] In order to enable the spreader bar to provide more stable support for the joint:

[0013] As a further improvement of the above technical solution: the bottom end of the spreading rod is arranged in an arc shape, and a plurality of hook teeth are evenly arranged on one side of the spreading rod away from each other.

[0014] The beneficial effect of this improvement is that by providing an arc-shaped spreading rod and hook teeth on the spreading rod, the joint can be supported more stably.

[0015] To make the spreader bar more stable to spread the joint:

[0016] As a further improvement of the above technical solution: limit rods are symmetrically arranged on the front and rear sides of the rack plate, and slide rails matched with the limit rods are symmetrically arranged on the front and rear inner side walls of the fixed shell.

[0017] The beneficial effect of this improvement is that when the movable rod drives the rack plate to move up and down, it drives the limit rod to slide along the slide rail, which can make the rack plate slide more stably so that the opening rod can open the joint more stably.

[0018] In order to prevent the gear from sliding forward and backward along the support shaft and affecting the support joint of the support rod:

[0019] As a further improvement of the above technical solution: a support shaft connected to a fixed housing is provided through the middle of the gear, and a limit ring is provided on the outer wall of the support shaft and at the front and rear ends of the gear.

[0020] The beneficial effect of this improvement is that when the rack plate moves up and down, it drives the gear to rotate along the support shaft to drive the expansion rod to move. A limit ring is set on the support shaft to prevent the gear from sliding back and forth along the support shaft and affecting the expansion rod expansion joint.

[0021] In order to facilitate the insertion of the limiting teeth into the limiting groove:

[0022] As a further improvement of the above technical solution: the thickness of the end of the limiting tooth close to the limiting groove is less than the thickness of the end away from the limiting groove. The thickness of the end of the limiting tooth close to the limiting groove is less than the thickness of the end away from the limiting groove.

[0023] The beneficial effect of this improvement is that it is easy to insert the limiting tooth into the limiting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0026] Figure 3 It is a front view cross-sectional structural schematic diagram of the utility model;

[0027] Figure 4 It is a schematic diagram of the enlarged structure of point A in the utility model;

[0028] Figure 5 It is a right side cross-sectional structural schematic diagram of the utility model.

[0029] In the figure: 1. fixed shell; 2. rack plate; 3. movable rod; 4. gear; 5. expansion rod; 6. through groove; 7. limit groove; 8. through groove; 9. enclosure; 10. slide rod; 11. limit tooth; 12. baffle; 13. spring; 14. hook tooth; 15. limit rod; 16. slide rail; 17. support shaft; 18. limit ring; 19. fixed rod. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0031] like Figure 1-5As shown, an orthopedic knee arthroscopy joint spreader comprises a fixed shell 1 and a joint spreader assembly arranged inside the fixed shell 1, wherein the joint spreader assembly comprises a rack plate 2 movably connected inside the fixed shell 1, a movable rod 3 arranged at the top of the rack plate 2 and extending to the top of the fixed shell 1, two gears 4 symmetrically arranged on both sides of the rack plate 2 and meshing with the rack plate 2, a spreader rod 5 respectively arranged at the bottom ends of the two gears 4, and through grooves 6 symmetrically opened on both sides of the fixed shell 1 and used for the movement of the spreader rod 5. A component for positioning the movable rod 3 is arranged at the top of the fixed shell 1. By arranging the joint spreader assembly in the fixed shell 1, not only can the affected part of the joint be stably spread, but also the width of the joint spread can be adjusted. The stretching rod 5 can keep the affected part in a stable stretching state, which is convenient for medical staff to observe and treat. The device is highly flexible in use, reasonable in structure, and easy to use. The components for positioning the movable rod 3 include a fixed rod 19 symmetrically arranged on both sides of the movable rod 3 and evenly provided with a plurality of limit grooves 7, a through groove 8 opened on the top of the fixed shell 1 and for the movable rod 3 to pass through, a surrounding plate 9 arranged on the outside of the movable rod 3, a sliding rod 10 symmetrically slidably connected to both sides of the surrounding plate 9, and a limit tooth 11 arranged on one end of the sliding rod 10 close to the fixed rod 19 and adapted to the limit groove 7. After the expansion joint is closed, the sliding rod 10 is slid along the surrounding plate 9 to drive the limit tooth 11 to be inserted into the limit groove 7 to limit the movable rod 3, so that the position of the rack plate 2 can be controlled. The limit makes the expansion rod 5 maintain the state of expanding the joint. A baffle 12 is provided on the side of the sliding rod 10 close to the limiting tooth 11. A spring 13 is connected to the outer wall of the sliding rod 10 and is located between the baffle 12 and the enclosure 9. When the movable rod 3 is limited, the sliding rod 10 can be prevented from slipping off the enclosure 9 under the elastic action of the spring 13, so that the limiting tooth 11 can be stably stuck in the limiting groove 7. The bottom end of the expansion rod 5 is arranged in an arc shape, and a plurality of hook teeth 14 are evenly arranged on the side of the expansion rod 5 away from each other. By setting an arc-shaped expansion rod 5 and setting hook teeth 14 on the expansion rod 5, the joint can be supported more stably. The limiting rods 15 are symmetrically arranged on the front and rear sides of the rack plate 2. The front of the fixed shell 1 The rear inner wall is symmetrically provided with slide rails 16 compatible with the limit rod 15. When the movable rod 3 drives the rack plate 2 to move up and down, it drives the limit rod 15 to slide along the slide rails 16, which can make the rack plate 2 slide more stably so that the opening rod 5 can open the joint more stably. The middle part of the gear 4 is penetrated by a support shaft 17 connected to the fixed shell 1. The outer wall of the support shaft 17 and the front and rear ends of the gear 4 are provided with limit rings 18. When the rack plate 2 moves up and down, it drives the gear 4 to rotate along the support shaft 17 to drive the opening rod 5 to move. The limit ring 18 is arranged on the support shaft 17, which can prevent the gear 4 from sliding back and forth along the support shaft 17 and affecting the opening of the joint by the opening rod 5, and can facilitate the insertion of the limit tooth 11 into the limit groove 7.

[0032] The working principle and use process of the utility model are as follows: when using the device, the sliding rod 10 is pulled outward along the enclosure 9, driving the limiting tooth 11 to be pulled out of the limiting groove 7, releasing the limiting tooth 11 on the movable rod 3, and pushing the movable rod 3 downward to drive the rack plate 2 to move downward, respectively driving the two gears 4 to rotate toward the side close to the rack plate 2, driving the two spreading rods 5 to move away from each other, and being able to spread the patient's joints, and then under the elastic action of the spring 13, the sliding rod 10 is inserted into the corresponding limiting groove 7 along the enclosure 9 and the limiting tooth 11 to fix the position of the movable rod 3, thereby being able to limit the position of the rack plate 2, so that the spreading rod 5 maintains the state of spreading the joints.

[0033] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. An orthopedic knee arthroscopy joint spreader, comprising a fixed housing (1) and a joint spreader assembly arranged inside the fixed housing (1), characterized in that: The joint spreading component comprises a rack plate (2) movably connected inside a fixed housing (1), a movable rod (3) arranged at the top of the rack plate (2) and extending to the top of the fixed housing (1), two gears (4) symmetrically arranged on both sides of the rack plate (2) and meshing with the rack plate (2), a spreading rod (5) respectively arranged at the bottom ends of the two gears (4), and through grooves (6) symmetrically arranged on both sides of the fixed housing (1) and used for the spreading rod (5) to move. The top of the fixed housing (1) is provided with a component for positioning the movable rod (3).

2. The orthopedic knee arthroscopy joint spreader according to claim 1, characterized in that: The assembly for positioning the movable rod (3) comprises a fixed rod (19) symmetrically arranged on both sides of the movable rod (3) and uniformly provided with a plurality of limiting grooves (7), a through groove (8) provided on the top of the fixed housing (1) and allowing the movable rod (3) to pass through, a surrounding plate (9) arranged on the outside of the movable rod (3), a sliding rod (10) symmetrically slidably connected to both sides of the surrounding plate (9), and a limiting tooth (11) arranged on one end of the sliding rod (10) close to the fixed rod (19) and adapted to the limiting groove (7).

3. The orthopedic knee arthroscopy joint spreader according to claim 2, characterized in that: A baffle (12) is provided on one side of the slide bar (10) close to the limiting tooth (11), and a spring (13) is connected to the outer wall of the slide bar (10) and located between the baffle (12) and the enclosure (9).

4. The orthopedic knee arthroscopy joint spreader according to claim 1, characterized in that: The bottom end of the spreading rod (5) is arranged in an arc shape, and a plurality of hook teeth (14) are evenly arranged on one side of the spreading rod (5) that is away from each other.

5. The orthopedic knee arthroscopy joint spreader according to claim 1, characterized in that: Limit rods (15) are symmetrically arranged on the front and rear sides of the rack plate (2), and slide rails (16) matching the limit rods (15) are symmetrically arranged on the front and rear inner side walls of the fixed housing (1).

6. The orthopedic knee arthroscopy joint spreader according to claim 1, characterized in that: A support shaft (17) connected to the fixed housing (1) is provided through the middle of the gear (4), and a limit ring (18) is provided on the outer wall of the support shaft (17) and at the front and rear ends of the gear (4).

7. The orthopedic knee arthroscopy joint spreader according to claim 2, characterized in that: The thickness of the limiting tooth (11) at one end close to the limiting groove (7) is smaller than the thickness at one end away from the limiting groove (7).

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