阅读说明：本技术 膝关节松弛度测量仪 (Knee joint looseness measuring instrument ) 是由 敖英芳 牛星跃 丁立 刘孟桢 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种膝关节松弛度测量仪,包括:箱体(1),为长方体结构,其长度方向上的一端设有踝关节顶板(2),另一端固定安装有高度调节机构,所述高度调节机构上设有可沿所述箱体(1)高度方向移动的滑块(3),所述高度调节机构的底部设有膝盖顶板(4)；力量测量机构,设于所述箱体(1)内,通过连接板(5)与所述滑块(3)固定连接,所述力量测量机构上设有连接扎带(6)；所述力量测量机构用于测量前抽屉力和后抽屉力。本发明能够自动对患者施加前后抽屉力,对操作者要求较低,而且具有发力均匀、安全高效和检测结果准确度高的优点。(The invention discloses a knee joint looseness measuring instrument, which comprises a box body (1) which is of a cuboid structure, wherein one end of the box body in the length direction is provided with an ankle joint top plate (2), the other end of the box body is fixedly provided with a height adjusting mechanism, the height adjusting mechanism is provided with a sliding block (3) capable of moving along the height direction of the box body (1), and the bottom of the height adjusting mechanism is provided with a knee top plate (4); the force measuring mechanism is arranged in the box body (1) and is fixedly connected with the sliding block (3) through a connecting plate (5), and a connecting binding belt (6) is arranged on the force measuring mechanism; the force measuring mechanism is used for measuring the front drawer force and the rear drawer force. The invention can automatically apply front and back drawer forces to a patient, has lower requirements on an operator, and has the advantages of uniform force application, safety, high efficiency and high accuracy of detection results.)

1. A knee joint laxity measuring instrument, characterized by comprising:

The box body (1) is of a cuboid structure, one end of the box body in the length direction is provided with an ankle joint top plate (2), the other end of the box body is fixedly provided with a height adjusting mechanism, the height adjusting mechanism is provided with a sliding block (3) capable of moving along the height direction of the box body (1), and the bottom of the height adjusting mechanism is provided with a knee top plate (4);

The force measuring mechanism is arranged in the box body (1) and is fixedly connected with the sliding block (3) through a connecting plate (5), and a connecting binding belt (6) is arranged on the force measuring mechanism; the force measuring mechanism is used for measuring the front drawer force and the rear drawer force.

2. The knee joint laxity measuring instrument according to claim 1, wherein: the box body (1) comprises a first side plate (11) and a second side plate (12) which are oppositely arranged, and a first end plate (13) and a second end plate (14) which are oppositely arranged, the ankle joint top plate (2) is arranged at the bottom of the first end plate (13), and the knee joint top plate (4) is arranged at the bottom of the second end plate (14).

3. The knee joint laxity measuring instrument according to claim 2, wherein: the bottoms of the ankle joint top plate (2) and the knee top plate (4) are both arc-shaped, and soft protective layers are arranged on the bottom surfaces of the ankle joint top plate and the knee top plate.

4. The knee joint laxity measuring instrument according to claim 2, wherein: the first side plate (11) and the second side plate (12) are telescopic plates with adjustable lengths.

5. The knee joint laxity measuring instrument according to claim 2, wherein: the height adjusting mechanism comprises a stepping motor (7), a mounting rack (21), a lead screw (8) and a sliding block (3), the mounting rack (21) comprises a top plate (22), a mounting plate (23) and a bottom plate (24) which are connected in sequence, the top plate (22) and the bottom plate (24) are perpendicular to the mounting plate (23), the stepping motor (7) is fixedly mounted at the top of the top plate (22), a via hole (25) is formed in the top plate (22), an output shaft of the stepping motor (7) penetrates through the via hole (25), one end of the lead screw (8) is fixedly connected with the output shaft, the other end of the lead screw is rotatably connected with the bottom plate (24), a threaded hole (28) matched with the lead screw (8) in a threaded manner is formed in the sliding block (3), and the mounting plate (23) is fixedly mounted on the inner side face of the second end plate (, and a screw rod limiting hole (26) is formed in the bottom plate (24).

6. The knee joint laxity measuring instrument of claim 5, wherein: be equipped with guided way (10) on mounting panel (23), be formed with on slider (3) with guided way (10) complex spout (9).

7. the knee joint laxity measuring instrument according to claim 1, wherein: the strength measuring mechanism comprises a front drawer force sensor top plate (15), a first force sensor (16), a connecting plate (5), a second force sensor (17) and a rear drawer force sensor top plate (18), which are sequentially arranged from top to bottom, and the connecting ribbon (6) is connected with the front drawer force sensor top plate (15).

Technical Field

The invention relates to medical equipment, in particular to a knee joint looseness measuring instrument.

Background

The anterior cruciate ligament is an important knee joint inner ligament and has the function of limiting the tibial anteversion and internal rotation. Rupture of the anterior cruciate ligament is a common injury of knee joint movement, which causes instability of the knee joint and accelerated degeneration of the knee joint. The effect of anterior cruciate ligament injury on knee joint laxity is an important indicator of the need for surgical treatment. Clinically, the anterior laxity of the knee joint is judged mainly by a physical examination-anterior drawer experiment of doctors. The front drawer experiment is affected by different experiences of doctors and the relaxation degree of patients in the operation, and has poor objectivity. The only most commonly used and accurate equipment at present is the KT-2000 knee joint relaxation gauge (now off-line) manufactured by medtronic. The device has a large appearance, needs manual operation, needs an inspector to apply front and back drawer forces to a patient during inspection, is difficult to control the force magnitude and direction, has uneven force application, is easy to make the muscle of the patient tense, even causes additional damage to the patient, and has an inspection result influenced by the operation experience of the inspector; the inspection preparation work is complicated, and the labor intensity of inspectors is high. With the accurate development of diagnosis and treatment of anterior cruciate ligament rupture, a new generation of knee joint relaxation measuring equipment is urgently needed.

Disclosure of Invention

the invention aims to provide a knee joint looseness measuring instrument, which can be used for overcoming the defects in the prior art, can automatically apply front and rear drawer forces to a patient, has low requirements on an operator, and has the advantages of uniform force application, safety, high efficiency and high accuracy of a detection result.

The invention provides a knee joint looseness measuring instrument, which comprises a box body, a height adjusting mechanism and a measuring device, wherein the box body is of a cuboid structure, one end of the box body in the length direction is provided with an ankle joint top plate, the other end of the box body is fixedly provided with the height adjusting mechanism, the height adjusting mechanism is provided with a sliding block capable of moving along the height direction of the box body, and the bottom of the height adjusting mechanism is provided with a knee top plate; the force measuring mechanism is arranged in the box body and is fixedly connected with the sliding block through a connecting plate, and a connecting ribbon is arranged on the force measuring mechanism; the force measuring mechanism is used for measuring the front drawer force and the rear drawer force.

In the knee joint laxity measuring instrument, preferably, the box body includes a first side plate and a second side plate which are oppositely arranged, and a first end plate and a second end plate which are oppositely arranged, the ankle joint top plate is disposed at the bottom of the first end plate, and the knee joint top plate is disposed at the bottom of the second end plate.

In the above knee joint flaccidity measuring instrument, preferably, the bottom of each of the ankle joint top plate and the knee joint top plate is arc-shaped, and a soft protective layer is disposed on the bottom of each of the ankle joint top plate and the knee joint top plate.

In the knee joint laxity measuring instrument, preferably, the first side plate and the second side plate are both length-adjustable expansion plates.

in the aforementioned knee joint looseness measuring apparatu, preferably, height adjusting mechanism include step motor, mounting bracket, lead screw and the slider, the mounting bracket is including roof, mounting panel and the bottom plate that connects in order, the roof with the equal perpendicular to of bottom plate the mounting panel, step motor fixed mounting be in the top of roof, be equipped with the via hole on the roof, step motor's output shaft passes the via hole, the one end of lead screw with output shaft fixed connection, the other end with bottom plate rotatable coupling, be formed with on the slider with lead screw spiro union complex screw hole, mounting panel fixed mounting be in on the medial surface of second end plate, be equipped with the spacing hole of lead screw on the bottom plate.

In the knee joint flaccidity measuring instrument, preferably, the mounting plate is provided with a guide rail, and the sliding block is provided with a sliding groove matched with the guide rail.

in the knee joint looseness measuring instrument, preferably, the force measuring mechanism includes a front drawer force sensor top plate, a first force sensor, the connecting plate, a second force sensor and a rear drawer force sensor top plate, which are sequentially arranged from top to bottom, and the connecting tie is connected with the front drawer force sensor top plate.

Compared with the prior art, the invention comprises the box body, the height adjusting mechanism and the force measuring mechanism, and the force measuring mechanism is driven by the height adjusting mechanism to move in the vertical direction, so that the front drawer and the rear drawer of the leg of the patient can be manufactured. The measuring mechanism is used for measuring the front drawer force and the rear drawer force, and the moving distance of the upper sliding block of the height mechanism is combined to detect whether the anterior cruciate ligament of the leg of the patient is damaged or not. The automatic detection of the anterior cruciate ligament of the leg is realized, the traditional manual operation is replaced, and the accuracy of the detection result is effectively improved.

Drawings

FIG. 1 is a use state reference diagram of the present invention;

FIG. 2 is a reference view of another aspect of the present invention in use;

FIG. 3 is an isometric view of a partial structure of the present invention;

FIG. 4 is an exploded view of the height adjustment mechanism;

Description of reference numerals: 1-box body, 2-ankle joint top plate, 3-slide block, 4-knee top plate, 5-connecting plate, 6-connecting binding belt, 7-stepping motor, 8-lead screw, 9-sliding groove, 10-guide rail, 11-first side plate, 12-second side plate, 13-first end plate, 14-second end plate, 15-front drawer force sensor top plate, 16-first force sensor, 17-second force sensor, 18-rear drawer force sensor top plate, 19-patient calf, 20-limiting flanging, 21-mounting frame, 22-top plate, 23-mounting plate, 24-bottom plate, 25-through hole, 26-lead screw limiting hole and 28-threaded hole.

Detailed Description

The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

The embodiment of the invention comprises the following steps: as shown in figures 1-4, a knee joint looseness measuring instrument comprises a box body 1, a height adjusting mechanism, a knee top plate 4 and a force measuring mechanism, wherein the box body 1 is of a cuboid frame structure, one end of the box body in the length direction is provided with an ankle joint top plate 2, the height adjusting mechanism is installed at the other end of the box body, the height adjusting mechanism is provided with a sliding block 3 capable of moving along the height direction of the box body 1, and the bottom of the height adjusting mechanism is provided with the knee top plate 4; the force measuring mechanism is arranged in the box body 1 and is fixedly connected with the sliding block 3 through a connecting plate 5, and a connecting ribbon 6 is arranged on the force measuring mechanism; the force measuring mechanism is used for measuring the front drawer force and the rear drawer force.

When in use, the ankle joint strength measuring device is integrally placed above the lower leg 19 of a patient, the height of the sliding block 3 is adjusted to be in accordance with the knee of the patient, the ankle joint top plate 2 is clamped at the ankle joint of the patient, and the strength measuring mechanism is bound on the lower leg 19 of the patient through the connecting binding belt 6. After fixation, the top of the height adjustment mechanism needs to be pressed by the physician's hand to aid in fixation, and then the test is started. Firstly, the slide block 3 is controlled to move downwards through the height adjusting mechanism, so that the force measuring mechanism generates downward pressure on the crus, a rear drawer is made on the crus, the rear drawer is judged to be completed after the slide block 3 reaches a certain displacement, the slide block 3 is controlled to start to move upwards through the height adjusting mechanism, the crus are lifted up through the connecting bandage 6, a front drawer is made on the crus, the slide block 3 stops after reaching a certain displacement, the front drawer force and the rear drawer force are obtained through the force measuring mechanism, the displacement data of the slide block 3 are obtained through the height adjusting mechanism, finally, the images of the force and the displacement are drawn, the examination is finished, and whether the front cruciate ligament of the patient is damaged or not can be. It should be noted that the front drawer force and the rear drawer force measured by the force measuring mechanism and the displacement data of the slider 3 obtained by the height adjusting mechanism can be directly displayed through an intelligent terminal, the intelligent terminal can be a smart phone, a tablet computer or a notebook computer, and the drawing force and displacement images can be drawn manually or automatically through the intelligent terminal.

Specifically, the box body 1 includes a first side plate 11 and a second side plate 12 which are oppositely arranged, and a first end plate 13 and a second end plate 14 which are oppositely arranged, the ankle joint top plate 2 is provided at the bottom of the first end plate 13, and the knee joint top plate 4 is provided at the bottom of the second end plate 14. The length of the first side plate 11 and the second side plate 12 should be equal to the length of the human shank, and certainly to ensure the accuracy of the detection result, preferably, the first side plate 11 and the second side plate 12 may adopt a telescopic plate structure with adjustable length, and the length can be adjusted according to the shank length of different patients to ensure the accuracy of the measurement structure. When the telescopic plate is adopted, the structural strength of the first side plate 11 and the second side plate 12 needs to be ensured, and deformation cannot occur.

Because ankle joint roof 2 and knee roof 4 are direct with patient's shank contact, need exert pressure moreover, consequently in order to guarantee patient's travelling comfort, preferably all design the bottom of ankle joint roof 2 and knee roof 4 for arc to all set up soft protective layer, like the sponge protective layer on the bottom surface of the two.

The height adjusting mechanism in the above embodiment only needs to be able to drive the slider 3 to move in the vertical direction and to record the displacement distance of the slider 3. The implementation mode has a lot, introduce a specific structure in this embodiment, height adjustment mechanism includes step motor 7, mounting bracket 21, lead screw 8 and slider 3, mounting bracket 21 is including the roof 22 that connects in order, mounting panel 23 and bottom plate 24, roof 22 and bottom plate 24 all are perpendicular to mounting panel 23, step motor 7 fixed mounting is at the top of roof 22, be equipped with via hole 25 on the roof 22, step motor 7's output shaft passes via hole 25, the one end of lead screw 8 and step motor 7's output shaft fixed connection, the other end and bottom plate 24 rotatable coupling, be formed with on the slider 3 with lead screw 8 spiro union complex screw hole 28, mounting panel 23 fixed mounting is on the medial surface of second end plate 14, be equipped with the spacing hole 26 of lead screw on the bottom plate 24.

In operation, the stepping motor 7 drives the lead screw 8 to rotate, and the lead screw 8 is in threaded fit with the slider 3, so that the slider 3 slides on the mounting plate 23 and is lifted or lowered while the lead screw 8 rotates. Because the distance between the threads on the lead screw 8 is fixed and unchanged, the displacement of the slide block 3 can be calculated according to the information such as the number of turns of the output shaft of the stepping motor 7, the distance between the threads and the like. The screw stopper hole 26 is provided in the bottom plate 24 to ensure the rotational stability of the screw 8, and a rolling bearing may be provided in the screw stopper hole 26 to ensure the smooth rotation of the screw 8.

In addition, in order to ensure the sliding stability of the slider 3, it is preferable that a guide rail 10 is provided on the mounting plate 23, and a slide groove 9 to be engaged with the guide rail 10 is formed on the slider 3.

Further, the force measuring mechanism comprises a front drawer force sensor top plate 15, a first force sensor 16, a connecting plate 5, a second force sensor 17 and a rear drawer force sensor top plate 18 which are sequentially arranged from top to bottom, and the connecting ribbon 6 is connected with the front drawer force sensor top plate 15. In order to facilitate the fixed connection of the cable tie 6, symmetrically arranged limiting flanges 20 can be arranged at the top of the top plate 15 of the front drawer force sensor, and the first force sensor 16 and the second force sensor 17 are commercially available products and can be directly purchased, such as JHBM-H1 kino plane force-measuring pressure-weight weighing sensors. When fixing the force measuring mechanism, the rear drawer force sensor top plate 18 needs to be attached to the front side of the patient's lower leg.

When the sliding block 3 moves upwards, the force measuring mechanism is carried by the connecting plate 5 to move upwards, so that pressure is applied to the first force sensor 16, front drawer force is measured, when the sliding block 3 moves downwards, the force measuring mechanism is carried by the connecting plate 5 to move downwards, downward pressure is generated on the lower leg on a small picture, and rear drawer force is measured by the second force sensor 17.

The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.