Knee joint magnetic resonance foot fixing device

Abstract

The utility model discloses a knee joint magnetic resonance foot fixing device which comprises a bottom plate. The special nuclear magnetic coil for the knee joint is fixedly arranged at the top end of the bottom plate; the mounting seat is fixedly arranged on the rear side of the top end of the bottom plate; the fixed seat is arranged on the rear side of the top end of the bottom plate; the foot support is fixedly arranged at the bottom end of the inner cavity of the fixed seat; the sliding fixing mechanism is arranged between the fixing seat and the bottom plate; and the foot angle adjusting mechanism is arranged in the inner cavity of the fixed seat. According to the knee joint magnetic resonance foot fixing device, the position of the clamping block can be adjusted by arranging the foot angle adjusting mechanism, so that feet of patients with different sizes can be clamped and fixed, the feet of the patients can be fixed, the feet can be deflected, adjusted and fixed by the clamping block by controlling movement of the connecting plate, operation is convenient and fast, and practicability is high. The adaptability is high, the stability is high, and the image quality and accuracy of knee joint magnetic resonance examination are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic resonance, in particular to a knee joint magnetic resonance foot fixation device. Background Art

[0002] In the prior art, knee MRI examinations usually use dedicated coils and adjust body position to meet examination requirements. In the traditional knee MRI positioning process, patients usually lie in a supine position with their feet placed in the center of the scanning bed and their knees flexed 10° to 15°. However, the prior art does not provide an effective solution for foot fixation. Existing implementation solutions mainly use manual operations to keep the feet as stable as possible, but this method has limited effect and cannot adapt to the differences in foot sizes among different patients. However, due to the lack of an effective foot fixation device, patients are prone to left and right rotation or movement of their feet during the examination, which causes knee motion artifacts, seriously affecting image quality and causing trouble for clinical diagnosis. Utility Model Content

[0003] The utility model aims to provide a knee joint magnetic resonance foot fixation device to solve the problem of lack of effective foot fixation devices in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a knee joint magnetic resonance foot fixation device, comprising:

[0005] Base plate;

[0006] A special nuclear magnetic coil for knee joint, fixedly arranged on the top of the bottom plate;

[0007] A mounting seat, fixedly arranged on the rear side of the top end of the bottom plate;

[0008] A fixing seat, arranged at the rear side of the top end of the bottom plate;

[0009] A foot support, fixedly arranged at the bottom end of the inner cavity of the fixing seat;

[0010] A sliding fixing mechanism, arranged between the fixing seat and the bottom plate;

[0011] The foot angle adjustment mechanism is arranged in the inner cavity of the fixing seat.

[0012] Preferably, the upper surface of the foot rest is an arc-shaped one that is concave inwards.

[0013] Preferably, the sliding fixing mechanism includes: a slider, a sliding groove is opened on both the left and right sides of the top of the mounting seat along the front-to-back direction, and sliders are fixedly arranged on both the left and right sides of the bottom end of the fixing seat, and the sliders are adapted to be plugged into the inner cavity of the sliding groove; a limit block is fixedly arranged on the rear bottom end of the fixing seat; a bolt, a plurality of screw holes are opened in sequence from front to back on the top of the mounting seat, and the bolt passes through the limit block and is screwed into the inner cavity of one of the screw holes.

[0014] Preferably, the slide groove is in a dovetail groove shape, and the sliding block is adapted to be plugged into the inner cavity of the slide groove.

[0015] Preferably, the foot angle adjustment mechanism includes: a strip shell, fixedly arranged at the top rear side of the fixing seat, and the fixing seat is communicated with the inner cavity of the strip shell; a servo motor, fixedly arranged on one side of the strip shell; a lead screw, the output end of the servo motor extends into the inner cavity of the strip shell and is locked with the lead screw through a coupling, and one end of the lead screw is rotatably connected to one side of the inner cavity of the strip shell through a bearing; a lead screw nut, lead screw nuts are screwed on both sides of the outer wall of the lead screw on the left and right sides; a connecting column, a connecting column is fixedly arranged on the front side of the lead screw nut, and the front side of the connecting column extends into the inner side of the fixing seat; a guide rod, fixedly arranged in the inner cavity of the strip shell along the left and right directions, and the lead screw nut is adaptively fitted to the outer wall of the guide rod.

[0016] Preferably, the foot angle adjustment mechanism also includes: a connecting plate, fixedly arranged on the front side of the connecting column; a screw, screws are inserted on both the left and right sides of the fixing seat, and one end of the screw is screwed to one side of the connecting plate; a sphere, one end of the screw extends out of one side of the connecting plate and is fixedly arranged with the sphere; a clamping block, adapted to fit the outer wall of the sphere; and a turning handle, fixedly arranged on the other end of the screw.

[0017] Preferably, the outer wall portion of the sphere extends out of one side of the clamping block.

[0018] Compared with the prior art, the beneficial effects of the utility model are: the knee joint magnetic resonance foot fixation device;

[0019] 1. The position of the fixing seat can be adjusted and fixed by providing a sliding fixing mechanism to adapt to the leg lengths of different patients, and the patient's legs can be fixed at a certain angle by fixing the patient's feet, so as to facilitate magnetic resonance examination of the knee joint;

[0020] 2. The position of the clamp can be adjusted by providing a foot angle adjustment mechanism to clamp and fix the feet of patients of different sizes. The clamp can deflect and adjust the foot and fix it by controlling the movement of the connecting plate. The operation is convenient, the adaptability is strong, and the stability is high, so as to ensure the image quality and accuracy of the MRI examination of the knee joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 For this utility model Figure 1 A in the enlarged view;

[0023] Figure 3 It is a right side cross-sectional view of the mounting seat of the utility model;

[0024] Figure 4 It is a top sectional view of the fixing seat of the utility model;

[0025] Figure 5 It is a schematic diagram of the assembly structure of the connecting plate of the utility model.

[0026] In the figure: 1. base plate; 2. special MRI coil for knee joint; 3. mounting seat; 4. fixing seat; 5. foot support; 6. sliding fixing mechanism; 61. slider; 62. slide groove; 63. limit block; 64. bolt; 65. screw hole; 7. foot angle adjustment mechanism; 71. strip shell; 72. servo motor; 73. lead screw; 74. lead screw nut; 75. connecting column; 76. guide rod; 77. connecting plate; 78. screw; 79. ball; 710. clamp block; 711. handle. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0028] See also Figure 1-5 , the utility model provides a technical solution: a knee joint magnetic resonance foot fixation device, comprising: a base plate 1, a knee joint special nuclear magnetic resonance coil 2, a mounting seat 3, a fixing seat 4, a foot support 5, a sliding fixing mechanism 6 and a foot angle adjustment mechanism 7;

[0029] The knee joint-specific nuclear magnetic resonance coil 2 is fixedly set on the top of the base plate 1, the mounting seat 3 is fixedly set on the rear side of the top of the base plate 1, the fixing seat 4 is set on the rear side of the top of the base plate 1, the foot support 5 is fixedly set at the bottom end of the inner cavity of the fixing seat 4, the sliding fixing mechanism 6 is set between the fixing seat 4 and the base plate 1, and the foot angle adjustment mechanism 7 is set in the inner cavity of the fixing seat 4.

[0030] As a preferred solution, further, the upper surface of the foot support 5 is an arc-shaped inwardly concave so as to support the heel of the patient.

[0031] As a preferred solution, further, the sliding fixing mechanism 6 includes: a sliding block 61, a sliding groove 62, a limiting block 63, a bolt 64 and a screw hole 65;

[0032] In order to be able to adjust and fix the position of the fixing seat 4, sliding grooves 62 are opened on both sides of the top of the mounting seat 3 along the front-to-back direction, and sliding blocks 61 are fixedly set on both ends of the left and right sides of the bottom end of the fixing seat 4, and the sliding blocks 61 are adapted to be plugged into the inner cavity of the sliding grooves 62. The limiting block 63 is fixedly set at the rear bottom end of the fixing seat 4, and a plurality of screw holes 65 are opened in sequence from front to back on the top of the mounting seat 3. The bolt 64 passes through the limiting block 63 and is screwed with the inner cavity of one of the screw holes 65.

[0033] As a preferred solution, further, the shape of the slide groove 62 is a dovetail groove, and the slider 61 is adapted to be plugged into the inner cavity of the slide groove 62 to prevent the fixing seat 4 from being separated from the mounting seat 3.

[0034] As a preferred solution, further, the foot angle adjustment mechanism 7 includes: a strip shell 71, a servo motor 72, a lead screw 73, a lead screw nut 74, a connecting column 75, a guide rod 76, a connecting plate 77, a screw 78, a ball 79, a clamp block 710 and a rotating handle 711;

[0035] In order to control the left and right movement of the connecting column 75, the strip shell 71 is fixedly arranged on the top of the rear side of the fixing seat 4, and the fixing seat 4 is communicated with the inner cavity of the strip shell 71, and the servo motor 72 is fixedly arranged on one side of the strip shell 71. The servo motor 72 adopts a non-magnetic motor as the existing technology and can be used in the magnetic resonance scanning room. The output end of the servo motor 72 extends into the inner cavity of the strip shell 71 and is locked with a lead screw 73 through a coupling, and one end of the lead screw 73 is rotatably connected to one side of the inner cavity of the strip shell 71 through a bearing. The left and right sides of the outer wall of the lead screw 73 are both screwed with lead screw nuts 74, and the front side of the lead screw nut 74 is fixedly arranged with a connecting column 75, and the front side of the connecting column 75 extends into the inner side of the fixing seat 4;

[0036] In order to limit the connection column 75 , the guide rod 76 is fixedly arranged in the inner cavity of the strip shell 71 along the left-right direction, and the lead screw nut 74 is adaptively matched with the outer wall of the guide rod 76 .

[0037] In order to clamp and fix the patient's foot, the connecting plate 77 is fixedly arranged on the front side of the connecting column 75, and screws 78 are inserted on the left and right sides of the fixing seat 4, and one end of the screw 78 is screwed to one side of the connecting plate 77, and one end of the screw 78 extends out of one side of the connecting plate 77 and is fixedly provided with a sphere 79, and the clamping block 710 is adapted to fit the outer wall of the sphere 79, and the rotating handle 711 is fixedly arranged at the other end of the screw 78, and rotating the rotating handle 711 can rotate the screw 78.

[0038] As a preferred solution, further, the outer wall portion of the sphere 79 extends out of one side of the clamp 710 so that the clamp 710 can rotate around the sphere 79 to facilitate the deflection and fixation of the foot.

[0039] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0040] Step 1: Pass the patient's leg through the knee joint dedicated nuclear magnetic resonance coil 2, so that the knee falls into the knee joint dedicated nuclear magnetic resonance coil 2, and the foot falls on the foot support 5, and the handle 711 is rotated to drive the clamping block 710 to move to one side under the action of the rotation force of the outer wall thread of the screw 78, so that the clamping block 710 clamps and fixes the patient's foot;

[0041] Step 2: Turn to the bolt 64, and release the limit of the fixing seat 4 by disengaging the bolt 64 from the inner cavity of the screw hole 65. The fixing seat 4 can be adjusted forward and backward under the restriction of the slider 61 and the slide groove 62. The position of the fixing seat 4 can be adjusted and fixed to adapt to the leg length of different patients, and the patient's leg can be bent and fixed at a certain angle;

[0042] Step three: Start the servo motor 72. Driven by the servo motor 72, the lead screw 73 can be controlled to rotate, so that the lead screw nut 74 can be controlled to deviate to one side under the action of the rotational force of the outer wall thread of the lead screw 73 and the limit of the guide rod 76, so that the clamping blocks 710 on both sides push the patient's foot to deflect to one side under the support of the foot support 5, so as to adjust and fix the deflected position of the knee joint, facilitate the MRI examination of the patient's knee joint, ensure the image quality, and facilitate wide promotion.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A knee joint magnetic resonance foot fixation device, characterized in that: include: Bottom plate (1); A special nuclear magnetic resonance coil (2) for the knee joint, fixedly arranged on the top of the base plate (1); A mounting seat (3) fixedly arranged on the rear side of the top end of the base plate (1); A fixing seat (4) is arranged on the rear side of the top end of the bottom plate (1); A foot support (5) is fixedly arranged at the bottom end of the inner cavity of the fixing seat (4); A sliding fixing mechanism (6) is arranged between the fixing seat (4) and the bottom plate (1); A foot angle adjustment mechanism (7) is arranged in the inner cavity of the fixing seat (4).

2. The knee joint magnetic resonance foot fixation device according to claim 1, characterized in that: The upper surface of the foot rest (5) is in an arc shape that is concave inwards.

3. The knee joint magnetic resonance foot fixation device according to claim 1, characterized in that: The sliding fixing mechanism (6) comprises: Sliding blocks (61), the left and right sides of the top of the mounting seat (3) are provided with sliding grooves (62) along the front-back direction, the left and right sides of the bottom of the fixing seat (4) are fixedly provided with sliding blocks (61) at both the front and back ends, and the sliding blocks (61) are adapted to be plugged into the inner cavity of the sliding grooves (62); A limit block (63) is fixedly arranged at the rear bottom end of the fixing seat (4); A bolt (64), a plurality of screw holes (65) are sequentially opened at the top of the mounting seat (3) from front to back, and the bolt (64) passes through the limiting block (63) and is screwed into the inner cavity of one of the screw holes (65).

4. The knee joint magnetic resonance foot fixation device according to claim 3, characterized in that: The shape of the slide groove (62) is a dovetail groove, and the sliding block (61) is adapted to be plugged into the inner cavity of the slide groove (62).

5. The knee joint magnetic resonance foot fixation device according to claim 1, characterized in that: The foot angle adjustment mechanism (7) comprises: A strip-shaped shell (71) is fixedly arranged at the top end of the rear side of the fixing seat (4), and the fixing seat (4) is in communication with the inner cavity of the strip-shaped shell (71); A servo motor (72) is fixedly arranged on one side of the strip-shaped housing (71); A lead screw (73), wherein the output end of the servo motor (72) extends into the inner cavity of the strip shell (71) and is locked with the lead screw (73) through a coupling, and one end of the lead screw (73) is rotatably connected to one side of the inner cavity of the strip shell (71) through a bearing; A lead screw nut (74), wherein the lead screw nuts (74) are screwed on both left and right sides of the outer wall of the lead screw (73); A connecting column (75), the front side of the lead screw nut (74) is fixedly provided with the connecting column (75), and the front side of the connecting column (75) extends into the inner side of the fixing seat (4); The guide rod (76) is fixedly arranged in the inner cavity of the strip shell (71) along the left-right direction, and the lead screw nut (74) is adaptively matched with the outer wall of the guide rod (76).

6. The knee joint magnetic resonance foot fixation device according to claim 5, characterized in that: The foot angle adjustment mechanism (7) further comprises: A connecting plate (77) fixedly arranged on the front side of the connecting column (75); A screw rod (78), wherein the left and right sides of the fixing seat (4) are both plugged with screw rods (78), and one end of the screw rod (78) is screwed to one side of the connecting plate (77); A sphere (79), one end of the screw rod (78) extends out of one side of the connecting plate (77) and is fixedly provided with the sphere (79); A clamping block (710) adapted to fit the outer wall of the spherical body (79); The rotating handle (711) is fixedly arranged on the other end of the screw rod (78).

7. The knee joint magnetic resonance foot fixation device according to claim 6, characterized in that: The outer wall portion of the spherical body (79) extends out of one side of the clamping block (710).

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