FI106151B - Measurement arrangement in a training apparatus for muscular strength - Google Patents

Description

106151

MEASUREMENT SCHEME IN MUSCLE TRAINING EQUIPMENT

The invention relates to a measuring arrangement as defined in the preamble of claim 1 for measuring force, power or work produced by muscles.

A measuring arrangement is known from FI patent publication 101343, in which a muscular force measuring apparatus is fitted to a fitness device. The force needed to lift the mass to be lifted, even with acceleration, can be measured by the device, as well as the lifting height, instantaneous power and work done. The arrangement is suitable for muscle movement by a traction device passing through a rotating wheel.

The measuring arrangement described above is not suitable for a simple lifting means for directly lifting a quantity of mass of the desired size or weight through a straight or lever arms. To overcome this defect, a measuring arrangement according to the present invention has been developed, characterized in that the apparatus includes force measuring sensors for measuring the lifting mass and the supporting forces of the moving arm structure at the arm pivot point and support point and the mass resting position on the supporting structure.

Other features of the invention are set forth in the subclaims.

An advantage of the invention is that a simple ergonomics device can be easily equipped with a measuring device by attaching an electronic measuring center and a display to the apparatus and generally placing power measurement sensors in only a few positions measuring the supporting forces. The device shows the weight of the load as soon as the weights are installed and the lifting force required, which may be the same or different from that due to the weight of the weights.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which

Figure 1 is a side view of the ergonomics apparatus.

Figure 2 shows the position of the force measuring sensors.

Figure 3 shows a support force diagram. 106151 2

Fig. 1 shows an ergonomics device, the body 2 of which has a muscle training device for the hands. The unit includes a lifting and lowering load unit for both hands. The load unit consists of a pivotable arm 3, a weight 6 placed on the arm 8, and a handle 7 formed at the end of the arm 8 by means of a pivot pin 3. The device further comprises a seat 1 on which the exercise is performed. With the grip of the hand grips 7, the weight load is raised and lowered either down to the support structure 5 or a new lifting is started earlier.

Figure 2 illustrates in more detail the moving load system and its supporting structures. The arm 8 is secured to the frame beam 2 by means of a pivot pin 3 passing through the beam 2 by means of a fork-like spacer 4 (Fig. 1). The pivot pin 3 has an elongated or loose hole in the beam 2, whereby the pin 3 may move slightly vertically. The vertical load of the pin 3 is received by a force measuring transducer 10 which provides information on both downward and upward force. A known force sensor is used as sensor 10, such as spring and hall sensor, strain gauge, press ductor or the like.

The arm 8 is supported, in its resting position, by a support included in the support structure 5, in connection with which a force sensor 9 is mounted; Support for power. These sensors 9 and 10 determine the hand load during lifting.

Fig. 3 is a diagram showing the force balance of the arm 8, where A has a pivot pin 3 and a sensor 10, B has a sensor 9, C has a weight 6 and D has a handle 7.

I The distances a, b, and c of points A, B, C, and D must be known and entered into the control unit of the device so that the device can, based on sensor data, indicate e.g. The calculation is made simply by the known torque equation.

The lifting cycles can be lowered if the arm 8 is dropped down to the sensor 9 between lifts. The lifting cycles can also be determined by 3 106151 by other means, for example, a slight change in load on the sensor 10 as the weight drop turns to lift. This causes an instantaneous increase of load on the sensor 10. The upward and downward movement of the arm 8 can also be investigated in other ways, e.g., by a rotation sensor around the pivot pin 3.

If the arm 8 is very short and when the arm 8 is swiveled substantially out of the horizontal direction, the control unit includes, in one embodiment of the invention, a correction function that takes into account the swing angle of the arm 8 when calculating the lifting force. When the turning angle or lifting height is measured in the lifting arms, the control unit is able to calculate the lifting work.

The apparatus includes a control unit in a suitable location attached to the body 2 (not shown), to which the sensor messages are routed. The unit includes a display screen and keys for eg entering distance values a, b, c and controlling the display (menu).

The apparatus is suitable for both exercise equipment with a lever arm and also for lifting a weight lifting bar directly from the brackets, whereby the distances a-c are o and only the sensor 9 on the bracket is needed.

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Claims (4)

4, 106151 1. A measuring arrangement in a muscle strength training or rehabilitation apparatus comprising a body (2), a weight arrangement adapted thereto, wherein? different masses (6) being disposed in the device for muscle movement and wherein the mass (6) is resting on the arm (8) with the arm at one end supported by pivot (3) and further supported by a bracket (5) at one point (B) of the arm; 7) for performing muscle movement and for sensing the sensors (9), (10) and the control unit sensor messages, characterized in that the apparatus includes force measuring sensors (9), (10) for measuring the lifting mass (6) and the supporting forces of the moving arm (8). at the pivot point (3) and the pivot point (B) both in the rest position of the mass on the support structure (5) and when lifting the mass. Arrangement according to Claim 1, characterized in that, based on the information received from the sensors (9), (10), the mass (6) and the lifting force (7) required for lifting can be calculated by the control center and displayed by the display. Arrangement according to Claim 1 or 2, characterized in that the control center can be supplied with distances (a, b, c) between the support force points (A, B, C, D). Arrangement according to one of Claims 1 to 3, characterized in that the arrangement comprises the calculation of lifting times. PATENTKRAV 106151