CN215128774U

CN215128774U - Tester for knee joint stretching and bending moment and activity

Info

Publication number: CN215128774U
Application number: CN202120986542.6U
Authority: CN
Inventors: 刘洋; 向川; 乔军; 毛兴佳; 高英杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-12-14
Anticipated expiration: 2031-05-10

Abstract

The utility model relates to a knee joint moment of flexion and activity degree apparatus, including the lower carriage, it is provided with the shank liner to slide on the lower carriage, the middle part and the lower carriage sliding connection of shank liner, install two pressure sensor at shank liner medial surface, lateral surface at the shank liner is provided with the display screen that is used for showing pressure sensor data, upper end fixed mounting at the lower carriage has the fixed axle, fixed mounting has the fixed gear on the fixed axle, the lower extreme of upper bracket articulates on the fixed axle, rotatable installation axis of rotation on the upper bracket, fixed mounting has loose gear in the axis of rotation, loose gear is connected with the fixed gear meshing, be provided with the location tooth on the periphery of axis of rotation outer end, threaded connection has set screw on the upper bracket, thigh and buttock liner fixed connection are in the upper end of upper bracket. The utility model discloses can realize the fixed of arbitrary angle between lower carriage and the upper bracket to through the accurate numerical value of pressure sensor measurement moment.

Description

Tester for knee joint stretching and bending moment and activity

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to knee joint is stretched and is buckled moment and mobility apparatus.

Background

A large number of patients undergo knee or lower limb related surgery, such as knee replacement surgery, arthroscopic knee surgery, and the like, each year. Frequent and accurate measurement of the related functions of the lower limbs of the patients, such as the knee joint extensor and flexor muscle force, moment, knee joint mobility and the like, is needed to evaluate the functions and the operation effects of the patients before and after the operation. Most of the existing measuring instruments only relate to one item, and most of the few instruments capable of measuring extensor muscle force and moment work by applying the muscle isokinetic contraction principle. Due to principle limitations, instruments that use isokinetic contraction for measurement are expensive, complex in structure, and inconvenient to use and maintain. Clinically, there is no instrument for measuring the moment of flexion and extension and knee joint mobility simultaneously and conveniently, which is necessary for the surgeon who needs frequent and accurate measurement data.

SUMMERY OF THE UTILITY MODEL

The utility model provides a knee joint is stretched out and is bent moment and mobility survey ware to above-mentioned problem.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the knee joint stretching and bending moment and activity degree measuring device comprises a lower support, an upper support, a thigh pad and a hip pad, wherein a crus pad is arranged on the lower support in a sliding manner, the crus pad is C-shaped, the middle part of the crus pad is connected with the lower support in a sliding manner, two pressure sensors are arranged on the inner side surface of the crus pad and are respectively used for measuring the pressure applied to the crus pad by the front side and the back side of the crus, a display screen for displaying the data of the pressure sensors is arranged on the outer side surface of the crus pad, a fixed shaft is fixedly arranged at the upper end of the lower support, a fixed gear is fixedly arranged on the fixed shaft, the lower end of the upper support is hinged on the fixed shaft, a rotating shaft is rotatably arranged on the upper support, a movable gear is fixedly arranged on the rotating shaft and is meshed with the fixed gear, positioning teeth are uniformly distributed on the circumferential surface of the outer end of the rotating shaft, positioning screws corresponding to the positioning teeth are connected to the upper support in a threaded manner, and the thigh and the hip pad are fixedly connected to the upper end of the upper support.

Further, both sides of axis of rotation are provided with left-handed ratchet mechanism and dextrorotation ratchet mechanism respectively, ratchet fixed mounting in left-handed ratchet mechanism and the dextrorotation ratchet mechanism is in the axis of rotation, ratchet in left-handed ratchet mechanism and the dextrorotation ratchet mechanism is installed respectively on two medial surfaces of upper bracket threaded connection has two winding screws on the lateral surface of upper bracket, and the tip of two winding screws all twines and has connected the rope, two connect the expansion end of rope and be connected with the expansion end of the ratchet in left-handed ratchet mechanism and the dextrorotation ratchet mechanism respectively.

Still further, the tip of set screw is sharp to better location.

Furthermore, the fixed shaft is hollow, so that the central condition of the knee joint can be observed conveniently.

Furthermore, the outer end face of the fixed shaft is provided with angle scale marks, and the outer side face of the upper support is provided with scale marks corresponding to the angle scale marks.

Furthermore, a sliding groove is formed in the middle of the crus pad, sliding connection between the crus pad and the lower support is achieved through the sliding groove, and a fastening screw is connected to the outer side of the sliding groove in a threaded mode, so that the crus pad and the lower support can be fixed conveniently.

Further, be provided with the straight line scale on the lateral surface of lower carriage, the zero scale of straight line scale is in same horizontal position with the centre of a circle of fixed axle the outside of shank liner is provided with the breach to in observing the straight line scale breach department is provided with the scale indicating line, just scale indicating line and pressure sensor are in same horizontal position.

Furthermore, a vertical observation groove is arranged in the middle of the lower support and the crus pad so as to observe the condition of the crus.

Furthermore, a baffle is fixedly connected to the left side surface or the right side surface of the lower part of the upper support, so that the limitation of 180 degrees of the maximum angle between the lower support and the upper support is realized.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model can realize the fixation of any angle between the lower bracket and the upper bracket, and measure the accurate value of the moment through the pressure sensor;

2. the angle of the utility model can be repeatedly adjusted, thereby realizing the accurate repeated measurement of the knee joint mobility;

3. the utility model can realize the unidirectional rotation of the upper bracket through the left-handed ratchet mechanism and the right-handed ratchet mechanism;

4. the utility model discloses simple structure, convenient to use save time, maintainability are strong.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the lower bracket of the present invention;

fig. 3 is a schematic structural view of the fixing shaft of the present invention;

FIG. 4 is a top view of the calf pad of the present invention;

FIG. 5 is a schematic view of the structure of the calf pad of the present invention;

FIG. 6 is a schematic view of the upper frame and the hip pad of the present invention;

fig. 7 is a partial sectional view of the upper bracket of the present invention;

fig. 8 is a schematic view of the transmission inside the upper bracket of the present invention;

in the figure, a lower support-1, an upper support-2, thigh and hip pads-3, calf pads-4, pressure sensors-5, a display screen-6, a fixed shaft-7, a fixed gear-8, a rotating shaft-9, a movable gear-10, positioning teeth-11, positioning screws-12, a left-handed ratchet mechanism-13, a right-handed ratchet mechanism-14, winding screws-15, connecting ropes-16, angle scale lines-17, scale marks-18, a sliding chute-19, linear scales-21, notches-22, a baffle-23, scale indication lines-24 and an observation groove-25.

Detailed Description

In order to further illustrate the technical solution of the present invention, the present invention is further explained by the following embodiments.

A knee joint stretching and bending moment and activity degree measuring device comprises a lower support 1, an upper support 2 and thigh and hip pads 3, wherein a crus pad 4 is arranged on the lower support 1 in a sliding mode, the crus pad 4 is C-shaped, a sliding groove 19 is formed in the middle of the crus pad 4, the crus pad 4 is connected to the lower support 1 in a sliding mode through the sliding groove 19, a fastening screw 20 is connected to the outer side of the sliding groove 19 in a threaded mode so as to fix the crus pad 4 and the lower support 1, two pressure sensors 5 are arranged on the inner side face of the crus pad 4 and used for measuring pressure applied to the crus pad 4 by the front side and the rear side of the crus respectively, a display screen 6 used for displaying data of the pressure sensors 5 is arranged on the outer side face of the crus pad 4, a linear scale 21 is arranged on the outer side face of the lower support 1, and the zero scale of the linear scale 21 and the circle center of a fixed shaft 7 are located at the same horizontal position, a notch 22 is arranged on the outer side of the crus pad 4 so as to observe a straight scale 21, a scale indicating line 24 is arranged at the notch 22, the scale indicating line 24 and the pressure sensor 5 are positioned at the same horizontal position, a fixed shaft 7 is fixedly arranged at the upper end of the lower bracket 1, the fixed shaft 7 is hollow so as to observe the center condition of the knee joint, an angle scale line 17 is arranged on the outer end surface of the fixed shaft 7, a scale mark 18 corresponding to the angle scale line 17 is arranged on the outer side surface of the upper bracket 2, a vertical observing groove 25 is arranged in the middle of the lower bracket 1 and the crus pad 4, a fixed gear 8 is fixedly arranged on the fixed shaft 7, the lower end of the upper bracket 2 is hinged on the fixed shaft 7, a baffle 23 is fixedly connected to the left side surface or the right side surface of the lower part of the upper bracket 2, in order to realize the limit of the maximum angle of 180 degrees between the lower bracket 1 and the upper bracket 2, a rotating shaft 9 is rotatably arranged on the upper bracket 2, a movable gear 10 is fixedly arranged on the rotating shaft 9, the movable gear 10 is meshed with the fixed gear 8, positioning teeth 11 are uniformly distributed on the circumferential surface of the outer end of the rotating shaft 9, positioning screws 12 corresponding to the positioning teeth 11 are connected to the upper bracket 2 in a threaded manner, the end parts of the positioning screws 12 are pointed to facilitate better positioning, the thigh and hip pad 3 is fixedly connected to the upper end of the upper bracket 2, a left-handed ratchet mechanism 13 and a right-handed ratchet mechanism 14 are respectively arranged on two sides of the rotating shaft 9, a ratchet wheel in the left-handed ratchet mechanism 13 and the right-handed ratchet mechanism 14 is fixedly arranged on the rotating shaft 9, ratchets in the left-handed ratchet mechanism 13 and the right-handed ratchet mechanism 14 are respectively arranged on two inner side surfaces of the upper bracket 2, two winding screws 15 are connected to the outer side face of the upper support 2 in a threaded mode, connecting ropes 16 are wound on the end portions of the two winding screws 15, and the movable ends of the two connecting ropes 16 are connected with the movable ends of ratchets in the left-handed ratchet mechanism 13 and the right-handed ratchet mechanism 14 respectively.

The using method comprises the following steps:

muscle force moment measurement

1. Marking the center of the side surface of the knee joint and the crus of the patient respectively;

2. aligning the observation groove 25 to the knee joint mark and aligning the scale indication line 24 on the crus pad 4 to the crus mark;

3. fixing the angle at any preset angle, advising the patient to bend the knee joint forcibly to obtain the muscle force under the force arm, and further obtaining the bending moment;

4. fixed angle when arbitrary preset angle, order the patient knee joint and straighten hard, obtain muscle strength size under this arm of force, and then obtain straightening moment size.

Knee joint mobility measurement

1. Advising the patient to wear the instrument when the knee joint is in a relaxed state, and adjusting the utility model to extend the knee joint in one direction, wherein the patient independently extends the knee joint, and the reading is carried out after the limit;

2. adjusting the utility model to bend the knee in one direction, and the patient can bend the knee joint automatically, and reading the limit position;

3. the two numbers are combined to obtain the knee joint mobility.

The essential features and advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The knee joint extends and bends moment and activity degree apparatus, its characterized in that: comprises a lower bracket (1), an upper bracket (2) and thigh and hip pads (3), wherein the lower bracket (1) is provided with a crus pad (4) in a sliding way, the crus pad (4) is C-shaped, the middle part of the crus pad (4) is connected with the lower bracket (1) in a sliding way, two pressure sensors (5) are arranged on the inner side surface of the crus pad (4) and are respectively used for measuring the pressure of the front side and the rear side of the crus for the crus pad (4), the outer side surface of the crus pad (4) is provided with a display screen (6) for displaying the data of the pressure sensors (5), the upper end of the lower bracket (1) is fixedly provided with a fixed shaft (7), a fixed gear (8) is fixedly arranged on the fixed shaft (7), the lower end of the upper bracket (2) is hinged on the fixed shaft (7), and the upper bracket (2) is rotatably provided with a rotating shaft (9), the movable gear (10) is fixedly mounted on the rotating shaft (9), the movable gear (10) is meshed with the fixed gear (8), positioning teeth (11) are uniformly distributed on the circumferential surface of the outer end of the rotating shaft (9), positioning screws (12) corresponding to the positioning teeth (11) are in threaded connection with the upper support (2), and the thigh and hip pad (3) is fixedly connected to the upper end of the upper support (2).

2. The knee joint flexion moment and mobility determinator of claim 1, characterized in that: the both sides of axis of rotation (9) are provided with levogyration ratchet (13) and dextrorotation ratchet (14) respectively, ratchet fixed mounting axis of rotation (9) in levogyration ratchet (13) and dextrorotation ratchet (14) is last, install respectively on two medial surfaces of upper bracket (2) the ratchet in levogyration ratchet (13) and dextrorotation ratchet (14) threaded connection has two winding screw (15) on the lateral surface of upper bracket (2), all twine at the tip of two winding screw (15) and have connection rope (16), two the expansion end of connecting rope (16) is connected with the expansion end of levogyration ratchet (13) and dextrorotation ratchet in (14) respectively.

3. The knee joint flexion moment and mobility determinator of claim 1, characterized in that: the end of the positioning screw (12) is pointed so as to facilitate better positioning.

4. The knee joint flexion moment and mobility determinator of claim 1, characterized in that: the fixed shaft (7) is hollow so as to be convenient for observing the central condition of the knee joint.

5. The knee joint flexion moment and mobility determinator of claim 1, characterized in that: the outer end face of the fixed shaft (7) is provided with angle scale marks (17), and the outer side face of the upper support (2) is provided with scale marks (18) corresponding to the angle scale marks (17).

6. The knee joint flexion moment and mobility determinator of claim 1, characterized in that: the middle part of the crus pad (4) is provided with a sliding groove (19), the sliding connection between the crus pad (4) and the lower support (1) is realized through the sliding groove (19), and the outer side of the sliding groove (19) is in threaded connection with a fastening screw (20) so as to fix the crus pad (4) and the lower support (1).

7. The knee joint flexion moment and mobility determinator of claim 4, characterized in that: be provided with straight line scale (21) on the lateral surface of lower carriage (1), the zero scale of straight line scale (21) is in same horizontal position with the centre of a circle of fixed axle (7) the outside of shank liner (4) is provided with breach (22) to in observe straight line scale (21) breach (22) department is provided with scale indicating line (24), just scale indicating line (24) are in same horizontal position with pressure sensor (5).

8. The knee joint flexion moment and mobility determinator of claim 1, characterized in that: and a vertical observation groove (25) is arranged in the middle of the lower bracket (1) and the crus pad (4).

9. The knee joint flexion moment and mobility determinator of claim 1, characterized in that: the left side face or the right side face of the lower portion of the upper support (2) is fixedly connected with a baffle (23) so as to realize the limitation of 180 degrees of the maximum angle between the lower support (1) and the upper support (2).