Knee osteoarthritis dilator

Abstract

The utility model discloses a knee joint osteoarthritis dilator, which belongs to the technical field of medical appliances, and comprises a dilating piece, a dilating component and a locking component, the dilating piece comprises a first dilating arm and a second dilating arm which are oppositely arranged, and the first dilating arm and the second dilating arm are movably connected through a shaft pin; the distraction assembly is used for opening and closing the end of the first distraction arm and the end of the second distraction arm, the distraction assembly comprises an arc-shaped rack and a positioning gear meshed with the arc-shaped rack, and the positioning gear is rotationally connected with the first distraction arm. The opening piece can be conveniently opened, and the opening angle can be conveniently controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of medical appliances, in particular to a knee osteoarthritis spreader. Background Art

[0002] Knee replacement surgery is a common treatment for diseases such as knee osteoarthritis and traumatic arthritis. During the operation, a spreader is needed to temporarily separate the femur and tibia bones in the knee joint so that the doctor can better observe and manipulate the tissues inside the joint.

[0003] The dilators currently in use are usually composed of two clamps in a scissor-shaped structure. When in use, medical staff need to manually press the tail end of the clamp to open the head end of the clamp to dilate the bone. When medical staff manually press the two clamps, if the pressure is too great, it may cause the dilating angle to be too large, while if the pressure is too light, it may cause inadequate dilating, affecting the treatment effect and making it difficult to control the dilating range. For this reason, we propose a knee osteoarthritis dilator to solve the above problems. Utility Model Content

[0004] The embodiment of the utility model provides a knee osteoarthritis distractor to solve the above-mentioned technical problems.

[0005] The embodiment of the utility model adopts the following technical scheme: it includes an opening piece, a spreading assembly and a locking assembly, the opening piece includes a first spreading arm and a second spreading arm which are relatively arranged, and the first spreading arm and the second spreading arm are movably connected by an axle pin, the spreading assembly is used to open and close the ends of the first spreading arm and the second spreading arm, the spreading assembly includes an arc-shaped rack and a positioning gear meshed with the arc-shaped rack, the positioning gear is rotatably connected to the first spreading arm, one end of the arc-shaped rack is fixedly connected to the second spreading arm, and the other end of the arc-shaped rack passes through the first spreading arm, the locking assembly is used to lock the spreading angle, and the rotation of the arc-shaped rack driven by the positioning gear can facilitate the spreading of the opening piece and the control of the spreading angle.

[0006] Furthermore, the locking assembly includes a locking block and a locking rod rotatably connected to the locking block. A fixing seat is provided on the first spreading arm. The locking rod passes through the fixing seat and is threadedly connected to the fixing seat to facilitate locking of the positioning gear.

[0007] Furthermore, the locking block is provided with a locking portion that can be inserted into two adjacent teeth of the positioning gear, and the locking block is slidably connected to the first support arm, so that the locking portion is inserted into the two adjacent teeth of the positioning gear to better lock the positioning gear.

[0008] Furthermore, a pointer is provided on the first opening arm, and scale lines are provided on the arc-shaped rack, so as to facilitate knowing the opening angle.

[0009] Furthermore, the tail ends of the first spreading arm and the second spreading arm are both provided with hand buckles, which are convenient for hand-held operation and are not easy to fall.

[0010] Furthermore, the first and second opening arms are each provided with an insertion portion at their head ends, and when the first and second opening arms are closed, the two insertion portions are parallel to each other and can be more easily inserted into the gap to be opened.

[0011] At least one of the above technical solutions adopted in the embodiment of the utility model can achieve the following beneficial effects:

[0012] In the utility model, the positioning gear drives the rotation of the arc gear to realize the opening and closing between the first opening arm and the second opening arm to open the opening member, and the pointer points to the value on the scale line to know the opening angle in real time, thereby controlling the opening degree and improving the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0014] Figure 1 A schematic diagram of the prior art structure provided for the utility model;

[0015] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0017] Figure 4 It is a schematic diagram of the propping structure of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the locking assembly in the utility model;

[0019] Figure 6 It is a three-dimensional structural schematic diagram of the arc-shaped rack in the utility model.

[0020] Reference numerals

[0021] An opening member 1, a first opening arm 11, a second opening arm 12, an axle pin 13, an arc-shaped rack 2, a positioning gear 21, a locking block 3, a locking rod 31, a fixing seat 32, a locking portion 33, a pointer 4, a scale line 5, a hand buckle 6, an insertion portion 7, a positioning rack 8, and a positioning tooth 81. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] The utility model provides a knee osteoarthritis distractor, wherein Figure 1 This is a schematic diagram of the structure of the prior art. The spreader is mainly formed by pivotally setting a positioning rack 8 on one of the spread arms, and setting a positioning tooth 81 that can be stuck in the positioning rack 8 on the tail end of the other spread arm. When the positioning tooth 81 is stuck in the positioning rack 8, the spreader's spread angle is fixed. In actual use, when the spreader is placed on the tibia and femur or other joints that need to be spread, the two spread arms can only be manually unfolded by medical staff applying a large force. A small force may result in an inadequate spread angle, while an excessive force may result in an excessive spread angle, affecting treatment. The above is the working principle and usage disadvantages of the prior art of the utility model. The technical problem to be solved by the utility model is to facilitate the adjustment of the spread angle. Based on the above problem, the main improvement of the utility model is to drive the movement of the arc-shaped rack 2 by rotating the positioning gear 21, so as to more conveniently realize the opening and closing of the first spread arm 11 and the second spread arm 12.

[0025] The invention of the utility model is described in detail below. Specifically, it includes an opening member 1, a spreading assembly and a locking assembly. The opening member 1 includes a first spreading arm 11 and a second spreading arm 12 that are arranged opposite to each other, and the first spreading arm 11 and the second spreading arm 12 are movably connected by an axle pin 13. The spreading assembly is used to open and close the ends of the first spreading arm 11 and the second spreading arm 12. The spreading assembly includes an arc-shaped rack 2 and a positioning gear 21 meshing with the arc-shaped rack 2. The positioning gear 21 is rotatably connected to the first spreading arm 11, and one end of the arc-shaped rack 2 is fixed to the second spreading arm 12. The arc-shaped rack 2 is connected, and the other end of the arc-shaped rack 2 passes through the first opening arm 11, wherein the center of the arc-shaped rack 2 coincides with the center of the axle pin 13. Specifically, when in use, the first opening arm 11 is held by hand, and the positioning gear 21 is rotated to make the arc-shaped rack 2 meshing with it drive the second opening arm 12 to rotate around the axle pin 13 to realize the opening and closing of the opening member 1, so as to facilitate the control of the opening angles of the first opening arm 11 and the second opening member 12. After the opening is completed, the positioning gear 21 is locked by the locking assembly, so as to prevent the rotation of the positioning gear 21 from causing the opening angle to change.

[0026] Preferably, the locking assembly includes a locking block 3 and a locking rod 31 rotatably connected to the locking block 3, a fixing seat 32 is provided on the first expansion arm 11, the locking rod 31 passes through the fixing seat 32 and is threadedly connected to the fixing seat 32, a locking portion 33 that can be inserted into two adjacent teeth of the positioning gear 21 is provided on the locking block 3, and the locking block 3 is slidably connected to the first expansion arm 11. Specifically, the fixing seat 32 is driven to approach one side of the positioning gear 21 by rotating the locking rod 31, and the locking portion 33 on the fixing seat 32 is inserted into the two teeth of the positioning gear 21 to lock the positioning gear 21 to prevent the positioning gear 21 from rotating at will.

[0027] Preferably, a pointer 4 is provided on the first spreading arm 11, and a scale line 5 is provided on the arc-shaped rack 2. When the second spreading arm 12 drives the arc-shaped rack 2 to move, the spreading angle can be known by the scale value on the scale line 5 pointed by the pointer 4, which is more conducive to the treatment work.

[0028] Preferably, the tail ends of the first spreading arm 11 and the second spreading arm 12 are both provided with a hand buckle 6, which can be a separate closed structure or a closed structure formed by connecting with the opening member 1, so as to facilitate the operation of the opening member 1 by holding the hand buckle 6.

[0029] Preferably, the head ends of the first stretching arm 11 and the second stretching arm 12 are both provided with an insertion portion 7, and when the head ends of the first stretching arm 11 and the second stretching arm 12 are closed, the two insertion portions 7 are parallel to each other, and the insertion portion 7 is flat, which can be more conveniently inserted into the stretched gap.

[0030] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A knee osteoarthritis distractor, characterized in that: include; An opening member (1), the opening member (1) comprising a first opening arm (11) and a second opening arm (12) arranged opposite to each other, and the first opening arm (11) and the second opening arm (12) are movably connected via a shaft pin (13); A spreading assembly, the spreading assembly is used to open and close the ends of the first spreading arm (11) and the second spreading arm (12), the spreading assembly comprises an arc-shaped rack (2) and a positioning gear (21) meshing with the arc-shaped rack (2), the positioning gear (21) is rotatably connected to the first spreading arm (11), one end of the arc-shaped rack (2) is fixedly connected to the second spreading arm (12), and the other end of the arc-shaped rack (2) passes through the first spreading arm (11); A locking assembly is used to lock the opening angle.

2. A knee osteoarthritis distractor according to claim 1, characterized in that: The locking assembly comprises a locking block (3) and a locking rod (31) rotatably connected to the locking block (3); a fixing seat (32) is provided on the first spreading arm (11); the locking rod (31) passes through the fixing seat (32) and is threadedly connected to the fixing seat (32).

3. A knee osteoarthritis distractor according to claim 2, characterized in that: The locking block (3) is provided with a locking portion (33) that can be locked into two adjacent teeth of the positioning gear (21), and the locking block (3) is slidably connected to the first opening arm (11).

4. The knee osteoarthritis distractor according to claim 1, characterized in that: The first spreading arm (11) is provided with a pointer (4), and the arc-shaped rack (2) is provided with a scale line (5).

5. The knee osteoarthritis distractor according to claim 1, characterized in that: Hand buckles (6) are provided at the tail ends of the first opening arm (11) and the second opening arm (12).

6. The knee osteoarthritis distractor according to claim 1, characterized in that: The head ends of the first opening arm (11) and the second opening arm (12) are both provided with an insertion portion (7), and when the head ends of the first opening arm (11) and the second opening arm (12) are closed, the two insertion portions (7) are in a parallel state.

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