JPH0724082A - Physical fitness measuring device - Google Patents

Abstract

PURPOSE:To provide a means of accurately measuring the braking power, or the treading power of the person being tested using this device structured so that a braking power is applied to a rotating body rotated by the treaded pedals. CONSTITUTION:A magnetrostictive torque sensor 60 is fixed to a power transmission system transmitting power from a rotating body to a braking power generation means to measure the transmission torque. The treading power, or the physical fitness of the person being tested is hereby quantitatively and accurately measured using this device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a physical fitness measuring device equipped with a foot pedal.

[0002]

2. Description of the Related Art As an apparatus for enhancing physical strength and an apparatus for fitness, a foot pedal structure having a braking force applying means is widely known.

[0003]

However, the conventional instrument of this type is not limited to simply applying the braking force, and it is possible to accurately determine how much the braking force is specifically applied. However, there is a problem that the physical strength cannot be measured accurately.

Therefore, the present invention solves such a problem, and accurately obtains the braking force acting on the foot pedal by measuring the transmission torque of the power transmission system, so that the physical strength can be accurately measured. The purpose is to do.

[0005]

In order to achieve the above object, the present invention provides a foot pedal, a rotary body rotated by the foot pedal, and a means for applying a braking force to the rotary force generated in the rotary body. And a magnetostrictive torque sensor which is provided between the rotating body and the braking force applying means and detects a torque transmitted between the rotating body and the braking force applying means. .

[0006]

In this structure, when the person to be measured depresses the foot pedal, the rotating body is rotated, and the rotational force is transmitted to the braking force applying means, and the braking force by the braking force applying means is also transmitted. But acts as a rotation resistance. At this time, since the torque transmitted between the rotating body and the braking force applying means is detected by the magnetostrictive torque sensor, the stepping force, that is, the physical force of the person to be measured can be quantitatively and accurately obtained.

[0007]

[Embodiment] In FIG. 2, reference numeral 10 denotes a foot pedal, which is a central shaft.
It is attached to the tip of a crank 14 which rotates around 12, and is stepped on by a person to be measured seated on a saddle (not shown). A sprocket 16 that can rotate integrally with the crank 14 is attached to the center shaft 12, and an endless chain 18 hung on the sprocket 16 is also hung on a freewheel sprocket 22 of an idle portion 20.

The idle portion 20 is provided with a timing pulley 24 which can rotate integrally with the sprocket 22. An endless timing belt 26 hung on the timing pulley 24 is attached to a timing pulley 30 of a braking load device 28. Is also hung. A rotor 32 is integrally rotatable with the timing pulley 30 and is configured to rotate around the stator 34.

The respective diameters are set so that the speed is increased from the sprocket 16 toward the freewheel sprocket 22 and from the freewheel sprocket 22 and the timing pulley 24 toward the timing pulley 30. Has been done. Further, in the braking load device 28, the braking force is applied by the electromagnetic force acting between the rotor 32 and the stator 34.

FIG. 1 shows a detailed structure of the idle section 20.
In the idle portion 20, a pair of housings 38, 38 supported by a frame (not shown) are arranged at a distance, and the bearing 4 housed in the housings 38, 38 is disposed.
Both ends of the torque detection shaft 42 are rotatably supported by 0, 40 ,. And this torque detection shaft 42
The aforementioned freewheel sprocket 22 is integrally rotatably attached to one end thereof, and the timing pulley 24 is integrally rotatably attached to the other end thereof. Each housing 38, 38 has an exterior cover 44 for the idle part 20,
44 are attached respectively.

A pair of magnetic anisotropic portions 46, 46 are formed on the outer circumference of the torque detecting shaft 42 between the freewheel sprocket 22 and the timing pulley 24. A pair of bearings 4 are provided around these magnetic anisotropic portions 46, 46.
A housing 50 is supported by 8, 48, and a shield core 52 that surrounds the magnetic anisotropic portions 46, 46 is housed inside the housing 50. Shield core 52
Inside the, close to the periphery of each magnetic anisotropic portion 46, 46,
A pair of coils 54, 54 are arranged. Torque detection shaft 42
By detecting changes in the magnetic permeability of the magnetic anisotropic portions 46, 46 when a torque is applied to the coils 54, 54, the magnitude of the torque at that time can be obtained. 56 is an electronic circuit for calculating the torque value, and 58 is its output line. As a result, the magnetostrictive torque sensor is installed in the idle section 20.
It has a built-in 60.

In such a structure, when the physical strength is measured, the person to be measured depresses the foot pedal 10 to continuously rotate the sprocket 16. Then, the rotational force is the chain 18, the freewheel sprocket 22,
It is transmitted to the braking load device 28 via the torque detection shaft 42 and the timing belt 26.

At this time, the rotational torque is transmitted to the torque detecting shaft 42, and the magnetic permeability of the magnetic anisotropic portions 46, 46 changes according to the magnitude thereof. Therefore, this change in the magnetic permeability is changed by the coil 5
By detecting at 4 and 54, the magnitude of the torque is accurately obtained, and the physical strength corresponding to the stepping force of the measurement subject is accurately measured.

[0014]

As described above, according to the present invention, it is provided between the rotating body rotated by the foot pedal and the braking force applying means, and transmitted between the rotating body and the braking force applying means. Since the magnetostrictive torque sensor for detecting the torque is provided, the stepping force, that is, the physical strength of the person to be measured can be quantitatively and accurately obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a physical fitness measuring device according to an embodiment of the present invention.

FIG. 2 is a schematic view of an entire body strength measuring device.

[Explanation of symbols]

 10 Foot pedal 16 Sprocket 28 Braking load device 42 Torque detection shaft 60 Magnetostrictive torque sensor

Claims (1)

[Claims] 1. A foot pedal, a rotary body rotated by the foot pedal, means for applying a braking force to the rotational force generated in the rotary body, and between the rotary body and the braking force applying means. A physical strength measuring device, comprising: a magnetostrictive torque sensor which is provided and detects the torque transmitted between the rotating body and the braking force applying means.