DD273155A3 - ADDITIONAL DEVICE FOR A FORCE MEASURING DEVICE - Google Patents

Abstract

The invention relates to an additional device for measuring the flexion of the human thumb in all its planes of motion and at all angular positions of the thumb opposite the hand for a device of known construction for measuring flexion forces of the human hand or single finger to solve scientific and practical issues in various fields Medicine, especially in occupational medicine, rehabilitation, physiotherapy, internal medicine, surgery, orthopedics, neurology and sports medicine. The inventive solution is that a handle on two hinges and a rotating stand with a cross support and support is connected and the support and the transverse support and the vertical planes of movement of the pivot joint I and the pivot joint II each arranged at an angle of 90 degrees to each other and in their Positions and settings are freely selectable and the movement level of the rotary stand arranged horizontally and its setting is freely selectable.

Description

Field of application of the invention

The invention relates to an additional device for measuring the flexion forces of the human thumb at various flexion functions using a device for measuring bouge forces of the human hand or individual fingers of known construction. In addition to the previously only possible measurement of the flexion forces of the II to V finger, the additional device also allows the determination of the flexion forces of the thumb at different flexion functions respectively in the direction of action of the force. The accessory device according to the invention is applicable to scientific and practical issues in various fields of medicine, especially in occupational medicine, rehabilitation, physiotherapy, internal medicine, surgery, orthopedics, neurology and sports medicine.

Characteristic of the known technical solutions Known is a device with which the flexion forces of the hand or the II. To V. Fingers at different flexion angles of the Fingers of the same hand or measured under biomechanically identical conditions for hands of different sizes

can be (DD-PS 204206).

The measurement of the flexion forces of the hand or II. To V. finger individually is made possible by the Griffteiio on perpendicular

arranged to each other standing lines and their positions on these lines are freely selectable and from the II to V. Fingererfaßtos, vertically adjustable to the height of each finger handle in operative engagement with a transducer.

An error-free measurement of the flexing force of the thumb is, however, with the known device for measuring bending forces

the human hand odor single finger (DD-PS 204206) not possible.

The force generated in the development of the bending force of the hand (hand closure) on the known device does not correspond to the Flexing force of the thumb, since the II. To V. fingers equal opposing force at the U. abutment serving horizontally

movable grip only partially active by the flexion of the thumb and the I. metacarpal bone and the other

Part passive and form-fitting In the Interdigitalboreich by the I. and II.Mittelhandknochen, the thumb ball and the Small finger is generated. Moreover, the direction of the flexing force of the thumb does not correspond to the direction of the thumb

resulting force of II. to V. finger, so that also for this reason the flexing force of the thumb is not identical

Counterforce to the resulting force of II. To V. Finger. The main component of the flexion force of the thumb acts in

acute angle to the longitudinal axis of the horizontally movable handle part.

Furthermore, a method and a device for determining the isometric tension on the adductor-pollicis muscle of the Thumb known (DE-OS 3030897). The method and device are set up so that the isometric force of the adductor muscle is stretched

fixed II. to V.Finger and as far as possible splayed and fixed η thumb, i. at maximum abduction, is measured. The given method and apparatus thus do not allow determination of the flexion force of the

Thumb at different abduction, flexion, abduction and opposition angles of the thumb, which is especially important

also for measuring the thumb force with stiffened in different positions or io different areas in the

Motion limited thumb is of importance. It is not certain that II V. fingers and largely stretched and spread thumb by arbitrary contraction the maximum force of the Musculus adductor pollicis can be deployed. In addition, the adduction of the thumb in the mentioned In the case of arbitrary construction, the procedure does not cause the sole cause of adductor pollicis. Object of the invention

The object of the invention is to develop an easy-to-use additional device for accurately measuring the maximum flexion, adduction, volar abduction and opposition forces of the human thumb, in conjunction with a known device for measuring flexion forces of the human hand or individual fingers. the dia disadvantages of known devices substantially eliminated.

Explanation of the essence of the invention

It is an additional device for measuring the maximum flexion, adduction, Volarabduktions- and opposition forces of the thumb for a force measuring device of known construction to provide an accurate measurement of the forces in the known bending functions in the broad sense, respectively in the direction of action of the force in biomechanically identical conditions for hands of different sizes and at all angular positions of the thumb against the hand allowed.

The additional device consists of a handle, a support, a cross support, a swivel stand and two swivel joints. According to the invention the object is achieved in that support and transverse support and the vertical movement of the pivot joint I and pivot Il each arranged at an angle of 90 ° to each other and their positions and settings are freely selectable and arranged the plane of movement of the swivel stand horizontally and its setting also freely selectable is.

Ausführungsbelsplel

In the following an embodiment of the additional device according to the invention will be described in more detail. The attached drawings show:

Flg. 1: the schematic front view of the additional device according to the invention, FIG. 2: the schematic side view of the additional device according to the invention corresponding to the section line A-A.

A handle 11st via a support 2, pivot I 12, pivot 1115, swivel stand 9 and cross support 6 connected to a support 4. This additional device is used in a device 27 known construction for measuring the flexion forces of the human hand or individual fingers (DD-PS 204206) instead of a horizontally movable handle part. The device 27 consists essentially of a vertically movable finger grip portion 25 and a horizontally movable handle portion, which are arranged perpendicular to each other and whose coordinates are freely selectable. In this case, the vortikai movable handle member 25 is on the tie bolt 26 with the force transducer of the device 27 in operative engagement. The ? upport 4 of the inserted instead of the horizontally movable handle part in the device 27 additional device for measuring c: r bending forces of the human thumb is adjusted in the horizontal plane in the longitudinal direction of the device 27.

Thereby, the longitudinal distance of the handle 1 to the finger grip part 25 can be adjusted. The longitudinal distance of the center line of the swivel stand 9 from the point of the finger grip part 25 closest to the swivel stand 9 is indicated by the pointer on the support 5 on the horizontal scale for the support 18. The transverse distance of the center line of the rotary stand 9 from the center line of the finger grip part 25 and thus the tension bolt 26 is dependent on the position of the cross support 6, which is indicated by the pointer on the cross support 8 on the horizontal scale for the cross support 19. The adjustment of the position of the transverse support β is carried out with the aid of the feed of the transverse support 7. The angular position of the handle 1 relative to the longitudinal direction of the tension bolt 26 in the horizontal plane can be changed with the aid of the swivel stand 9. For this purpose, the lock 10 of Drohständers to solve. The pointer 11 em rotary stand 9 indicates the angular position of the handle 1 to the longitudinal axis of the tension bolt 26 on a horizontal dial 20 at. In the reproduced in Figure 1 and 2 position of the handle 1 of the Zolger 11 stands on the rotary stand 9 on numeral, 0 "of the horizontal dial 20. With respect to the given by this pointer division direction of the handle 1 on the swivel stand 9 is both to the right and rotatable 180 ° to the left.

The angular position of the handle 1 to the longitudinal axis of the tension bolt 26 in a vertical plane I is changed at the pivot I 12. For this purpose, the lock 13 of the rotary joint I has been solved. The double rack I 14 indicates on the vertical scale segment I 21 on both sides of the handle 1, the vertical angle of the handle 1 to the longitudinal axis of the tension bolt 26 at. In the position of the handle 1 which can be seen in FIG. 1, the double pointer I 14 points to the number. 0 "of the vertical scale segment I 21. In the vertical plane of the pivot joint I 12, the handle can be rotated 11m clockwise by + 90 *, counterclockwise by -90 * be adjusted.

The angular position of the handle 1 relative to the horizontal plane can also be changed by means of the rotary joint Il 15 in a vertical plane II, which is at right angles to the identical with the functional plane of the rotary joint I 12 vertical plane I. Previously, the lock 16 of the rotary joint Il to Ιδββη.

The double pointer 1117 indicates on the vertical skeleton segment Il 22 on both sides of the swivel stand 9, the angular position of the handle 1 relative to the horizontal plane in the Vortikalebone Il. The position of the handle 1 shown in Figure 2 corresponds to the position "0" of the double pointer Il 17 on the vertical scale segment Il 22nd

With the help of the support 4 and cross supports β for varying the position of the handle 1 relative to the finger grip portion 25 in the horizontal plane, by the variation of the vertical position of the finger grip portion 25 (DD-PS 204206) and by means of the rotary stand 9, the pivot joint I 12 and Swivel joint Il 15 for varying the angular positions of the handle «1, it is possible, the maximum Kraftverfaltung at different measuring points of the thumb including the MP joint in different angular positions in the various flexion functions of the thumb for different sized hands under the same biomechanical conditions as closely as possible in the direction of Axle of the tension bolt 26 and thus without significantly deviating «force components to measure virtually error-free.

The horizontal scales 18 and 19 for Support 4 and Quersopport 6, the horizontal dial 20, the vertical scale segment I 21 and the vertical scale segment Il 22 allow in conjunction with the pointer 11 and the double pointer I 14 and the double pointer Il 17, the positions and Specify angular positions of the handle 1 and the forearm support 24 in millimeters and degrees and thus to reproduce the position of the thumb, hand and forearm during repeat measurements exactly.

The following functions of the additional device are used for measuring the forces in the various flexion functions of the thumb, starting from the zero positions of the functions of the auxiliary device indicated in FIGS. 1 and 2: For measuring the adduction forces occurring in the palmar plane at different degrees of abduction and at different levels Measuring points of the extended thumb can be detected, appropriate settings of the support 4, the cross support 6, the rotary stand 9, the pivot joint I 12 and the pivot joint Il 15 are made, the angle at the pivot I 12 and pivot Il 15 after initial adjustment regardless of Abduction angle remains constant. The finger grip part 25 is set only once at the beginning of the measurement to the height of the thumb located in the horizontal plane. As an abutment for generating the force here is the Wide'lager on the handle. 3

For measuring the flexion forces in the strict sense, which can be done at different measuring points of the thumb at different degrees of flexion in JP, MP or CM joint or multiple joints at the same time in the plane immediately below the palm or in a plane that the thumb when flexing to the tip of the index finger, the necessary positions and angles on the support 4, cross support 6, swivel stand 9, swivel joint I 12 and swivel joint 1115 must be set. For measurements in a plane, the angles at the hinges I 12 and I 15 remain constant after initial adjustment irrespective of the flexion angles. Also, the finger grip portion 25 is brought only once at the beginning of the measurement at the level of the horizontal plane located in the thumb.

As an abutment for generating the force in the measurement of flexion forces also the abutment on the handle 3 is effective. The measurement of the Fiexionskräfte on the base member and the MP joint of the thumb at maximum flexion in all joints is possible that the handle 1 in the Pereich II. To V. Finger is a hollow hand adapted, thin-walled half-shell, and the U-shaped , with the handle 1 releasably connected support 2 under the handle 1 also leaves enough space for the accommodation of the thumb.

To measure the forces at different degrees of Volarabduktion and at different measuring points of the thumb, the appropriate setting of support 4, cross support 6, pivot I 12, swivel Il 15, swivel stand 9 and Fingerzuggriff 25 is made. Here, pivot joint Il 15 and pivot stand 9 remain constant regardless of Volarabduktionswinkel. Volar abduction occurs in a plane perpendicular to the palm, which describes the maximum abducted, stretched thumb when moving towards the palm. To generate the thumb forces in Volarabduktion used in the maximum abduction approximate positions a belt with pad 23, in the maximum Volarabduktion approximate positions the abutment on the handle 3 for fixing the hand. To measure the thumb forces at different degrees of opposition and at different measuring points of the thumb, a corresponding setting of support 4, cross support 6, revolving stand 9, pivot I 12 and pivot Il 15 is required. The vertical position of the finger grip 25 and the settings of pivot I 12 and pivot Il 15 remain constant inde pendent of the degree of opposition.

The opposition movement is composed of the volar abduction and flexion movements and allows the thumb tip to reach the outer ulnar palm areas. To develop the thumb force in opposition cause the handle 1 and partially the abutment on the handle 3, the fixation of the hand. Due to the described construction of the handle 1 and the carrier 2, the measurement of the thumb force is possible even when approaching the maximum opposition.

Claims (1)

Additional device for a force measuring device known construction for accurately measuring the maximum flexion, adduction, Volarabduktions- and opposition forces of the thumb in the direction of action of the force in biomechanically largely identical conditions for hands of different sizes and at all angular positions of the thumb gogenüber the hand, consisting of a Handle, a support, a cross support, a rotary stand and two hinges, characterized in that support (4) and cross support (6) and the vertical planes of movement of pivot 1 (12) and pivot Il (15) each at an angle of 90 degrees to each other arranged and their positions and settings are freely selectable and the plane of movement of the swivel stand (9) arranged horizontally and its setting is also freely selectable. For this 2 pages drawings