CN2245958Y

CN2245958Y - Joint stress meter

Info

Publication number: CN2245958Y
Application number: CN 96213820
Authority: CN
Inventors: 张树林; 刘立东
Original assignee: Individual
Current assignee: Liu Lidong; Zhang Shulin
Priority date: 1996-06-24
Filing date: 1996-06-24
Publication date: 1997-01-29
Anticipated expiration: 2006-06-24

Abstract

The utility model relates to a joint stress meter. The utility model is composed of a pair of fixed arc plate which applies force to the joint parts, a fixed arm, wherein, one end of which is connected with the fixed arc plate and the other end is connected with a support frame with right screw, a displayer which is respectively assembled with the other fixed arc plate and a converter with left screw and is used for processing force and displacement signal and displaying a pulling force and pressure force value and a displacement value, and a displacement sensor which is assembled with the support frame and the converter. The support frame and the converter are in screwing assembly with a screw shaft which is provided with a force applying handle which drives the support frame and the converter to do a corresponding force applying movement. The Joint stress meter is suitable for diagnosing the injury of the ligaments of the elbow joint, the knee joint and the ankle joint. The utility model has important functions for early diagnosing the ligament injury and preventing the traumatic arthritis generated in a long term.

Description

A kind of joint stress ga(u)ge

This utility model relates to a kind of joint stress ga(u)ge of diagnosing the articular ligament damage, especially for the joint stress ga(u)ge of the ligament injury of diagnosing joint parts such as elbow, knee joint and ankle.

In orthopedic injury and athletic injury clinical practice, the morning of ligament injury, diagnosis and early treatment prevented the key that traumatic arthritis takes place at a specified future date.In real work in the past, the doctors of employing take X-ray film to diagnose ligament injury after causing stress position, joint with hands again, but because the difference of individual patient and the difference of doctor's strength size usually cause the diagnosis deviation, be exposed to for a long time in the middle of the X line simultaneously, doctor and patient's body health have been caused great injury.

The purpose of this utility model, be to overcome above-mentioned deficiency, a kind of diagnostic instruments of articular ligament damage of novelty is provided, and this joint stress ga(u)ge can make the diagnosis of articular ligament damage realize accurately quantification, reduces simultaneously or avoids the injury of X line to doctor and patient.

The technical solution that realizes described purpose and provide is: this joint stress ga(u)ge comprises displacement transducer, be used for processing power and displacement signal and show pressure and the display instrument of shift value, it is characterized in that having the fixed arch plate of a pair of power of applying in joint part, an one end is connected the fixed arm that the other end is connected with the support that has right-hand screw with a fixed arch plate, a transducer that has left-hand screw, this displacement transducer of institute is equipped mutually with support and transducer respectively, described display instrument is connected with transducer with another fixed arch plate respectively by screw rod, described support and transducer and helical axis are equipped in the shape of a spiral, and this helical axis is equipped with and can makes its drive support and transducer make the afterburning handle of corresponding force application movement.

For fixed arch plate is fixed with joint part better, fixed arch plate all is equipped with velcro.

For this joint stress ga(u)ge can be diagnosed elbow, knee joint and the ligament injury in the different joints of ankle, on described support, be provided with four secured adjusted holes, make described fixed arm become three different angles with its secured adjusted, with corresponding elbow, knee joint and ankle joint.

Because the joint stress ga(u)ge that provides of this utility model is to contact with the human synovial position by a pair of fixed arch plate, has avoided the doctor to cause and taken the injury that the X sheet brings to doctor and patient with the diagnosis ligament injury behind the stress position, joint again with hands.In addition, because this joint stress ga(u)ge can show pressure and corresponding displacement simultaneously, therefore, the doctor can know the size and the corresponding displacement of the application of force exactly.Like this, the doctor is the size of pressure fixedly, is the diagnosable degree of injury that goes out articular ligament by contrasting different shift values, and the diagnosis that makes ligament injury is quantification accurately.

Principle, formation and the mode of operation etc. of the joint stress ga(u)ge that this utility model is provided below in conjunction with accompanying drawing are described in detail.

The structure principle chart of the joint stress ga(u)ge that Fig. 1 provides for this utility model;

The front view (broken section) of the joint stress ga(u)ge that Fig. 2 provides for this utility model;

The vertical view of the joint stress ga(u)ge that Fig. 3 provides for this utility model;

Fig. 4 is that knee joint directly loads sketch map to stress;

Fig. 5 is that elbow, knee joint and ankle joint lateral stress load sketch map.

The joint stress ga(u)ge that Fig. 1, Fig. 2 and this utility model shown in Figure 3 provide has the fixed arch plate (7,11) of a pair of power of applying joint part, in order to be fixed on the joint side better, disposes velcro (8) on this fixed arch plate.One end of fixed arm (12) is fixedly connected according to the position in diagnosis joint accordingly with the adjustment hole (14,15,16,17) that has on the support (3) of right-hand screw (not looking out among the figure), the other end of fixed arm (12) connects with fixed arch plate (11), its connected mode links by connector (13) as shown in Figure 2.The transducer (5) that has the support (3) of right-hand screw and have left-hand screw (not looking out among the figure) is equipped in the shape of a spiral with helical axis (2).Described transducer (5) is made up of spiral piece (18) and end cap (19).The axial line of displacement transducer (4) and helical axis (2) is configured in parallel, and the one end links to each other with the projection (20) of support (3), and the mobile fixing head (21) of the other end and the drive displacement transducer (4) on being configured in end cap (19) is connected.Be used for processing power and displacement signal and show pressure and the display instrument of shift value (6), the one side is connected with fixed arch plate (7) by standing screw (9), and opposite side is connected by the end cap (19) of standing screw (10) and transducer (5).Described helical axis (2) is equipped with and can makes its drive support (3) and transducer (5) make the afterburning handle (1) of corresponding force application movement.

What this joint stress ga(u)ge was selected for use is used for processing power and displacement signal and shows pressure and the display instrument of shift value (6), usually with charactron or liquid crystal display pressure value and shift value, adopt single chip machine controlling circuit, can gather in real time, show and keep pressure numerical value and axial displacement.This display instrument (6) is made of shell (22), circuit board (23) and pull pressure sensor (24) generally as shown in Figure 2.Described pull pressure sensor (24) and displacement transducer (4) are conventional prior art.

Conventional mechanical connection manner is all adopted in connection between these each parts of joint stress ga(u)ge.

When this joint stress ga(u)ge is operated, at first two fixed arch plates are separately fixed at side, joint or the place ahead (fixed form as shown in Figure 4 and Figure 5) by the velcro on it (8).Shake afterburning handle (1), helical axis (2) rotation, will rotatablely move by transducer (5) converts rectilinear motion to, and the joint is produced tensile stress (both direction all can).Helical axis (2) through fixed arch plate (7,11) to the joint apply certain directly to or lateral stress, the size of power records by pull pressure sensor (24), and is shown by display instrument (6).Because the joint has been applied power, close festival-gathering generation front and back displacement or side direction and become the angle, can measure the displacement size by displacement transducer (4), its numerical value shows by display instrument (6), the also available simultaneously X-ray method of taking pictures is observed the size that this displacement or side direction become the angle, and then the degree of injury of definite articular ligament.

Be not difficult to find out by top explanation, the joint stress ga(u)ge that this utility model provides, take X-ray film again to diagnose that ligament injury brings after having avoided the doctor to cause stress position, joint because the diagnosis deviation that individual patient difference and doctor's strength vary in size and causes with hands, and be exposed to for a long time in the middle of the X line easily doctor and patient body such as are damaged at problem, and can make the diagnosis of ligament injury accurately realize quantification.It is to diagnosing the morning of ligament injury and preventing that the traumatic arthritis that takes place at a specified future date has important effect.

Claims

1. joint stress ga(u)ge, especially for the diagnosis elbow, the joint stress ga(u)ge of knee joint and ligament injuries of ankle joint, it comprises displacement transducer (4), be used for processing power and displacement signal and show pressure and the display instrument of shift value (6), feature of the present utility model is, the fixed arch plate (7 of a pair of power of applying in joint part arranged, 11), an one end is connected the fixed arm (12) that the other end is connected with the support that has right-hand screw (3) with fixed arch plate (11), a transducer (5) that has left-hand screw, described support (3) and transducer (5) are equipped in the shape of a spiral with helical axis (2), described pick off (4) is equipped mutually with support (3) and transducer (5), described display instrument (6) is by its screw rod (9,10) be connected with transducer (5) with another fixed arch plate (7) respectively, described helical axis is equipped with and can makes its drive support (3) and transducer (5) make the afterburning handle (1) of corresponding force application movement.

2. joint according to claim 1 stress ga(u)ge is characterized in that disposing velcro (8) on the fixed arch plate (7,11), is used for fixing in the joint side.

3. joint according to claim 1 stress ga(u)ge, it is characterized in that described support (3) is provided with four secured adjusted holes (14,15,16,17), make the other end of described fixed arm (12) become three angles with its secured adjusted, correspond respectively to the position of knee joint, elbow joint and ankle joint.

4. joint according to claim 1 stress ga(u)ge is characterized in that described transducer (5) is made up of spiral piece (18) and end cap (19).

5. joint according to claim 1 stress ga(u)ge, it is characterized in that the described displacement transducer (4) and the axial line of helical axis (2) are configured in parallel, the one end links to each other with the projection (20) of support (3), and the other end links to each other with the fixing head (21) that drive displacement transducer (4) on being configured in end cap (19) moves.