JPS61290968A - Pedal motion type exerciser - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pedal exerciser, and more particularly to a pedal exerciser equipped with a device for measuring workload.

[Prior Art] German Patent No. 1961488 discloses a bicycle-type exercise machine related to the present invention. In the bicycle-type exercise machine disclosed above, the flywheel rotated by the crank is a brake disc of a disc brake, and the braking force (load) is adjusted by pinching one place of the brake disc from both the left and right sides with brake shoes. ing.

[Problems to be Solved by the Invention] However, with this configuration, the load is applied at one location on the brake disc, which serves as the flywheel, resulting in an unbalanced rotation of the flywheel, resulting in a poor usability. Ta.

Therefore, the main object of this invention is to provide a pedal motion that applies a well-balanced load to the flywheel rotated by a pedal crank, allows smooth rotation of the flywheel, is comfortable to use, and allows the user to easily recognize the correct amount of work. To provide a type exerciser.

[Means for Solving the Problems] The present invention includes a load device that is rotatably provided coaxially with the axis of the flywheel and applies a load by sandwiching the outer peripheral surface of the flywheel from both sides in the diametrical direction. ing.

Further, in a preferred embodiment, an elastic member that expands and contracts in accordance with the movement of a load device that is moved with the rotation of a flywheel, and an elastic deformation m (amount of expansion and contraction) of the elastic member is determined by an electrical impedance (for example, a resistance value or a reactance value). ), change the oscillation frequency based on the change, and digitally measure the amount of work at that oscillation frequency.
'f.

[Operation] Since the load device diametrically pinches the peripheral surface of the flywheel from both sides, the load applied to the flywheel is applied equally to the axis of the flywheel.

The elastic deformation of the elastic member stops when it is balanced with the rotational force of the load device. The amount of elastic deformation of the elastic member is converted into a change in electrical impedance. The oscillation means oscillates at a predetermined frequency based on the change in impedance. This oscillation frequency or period is measured and the amount of work imparted to the pedal crank is measured digitally.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention. Referring to FIG. 1, a pedal exerciser 10 according to an embodiment of the present invention has a frame 1 placed stationary on the floor.
Contains 2. The frame 12 includes a handle 14 and a saddle 1.
6, a drive wheel 20 driven by a pedal 18, and a flywheel 24 connected to this by a chain 22 or the like. The flywheel 24 is associated with a load mechanism 26 for applying a predetermined load to the flywheel 24 and a load detector 2 for measuring the load on the flywheel 24.
8 is attached. Further, in relation to the pedal 18, a rotation speed detector 3 for detecting the rotation speed of the pedal 18 is provided.
0 is installed.

Based on the outputs of the load detector 28 and the rotation speed detector 30, the display device W13 attached to the handle 14
2 shows the amount of work etc.

FIG. 2 shows a load mechanism 26, which is one of the features of this embodiment.
FIG. 2 is a diagram for explaining the configuration. Referring to the second cause,
Load mechanism 26 includes an arm 36 rotatably supported on rotation axis 34 of flywheel 24 . The arm 36 is a rod-shaped member that extends in the diametrical direction of the flywheel 24 about the rotation axis 34 and has approximately the same length as the diameter. Brake levers 38.4 are provided at both ends of the arm 36 so as to project from each end in the direction of rotation of the flywheel 24 (in the six directions of arrows).
0 is installed. The connection between the arm 36 and each brake lever 38.40 is made by means of a connecting pin 42.44, such that the brake lever 38.40 can be individually pivoted relative to the arm 36 in the radial direction of the flywheel 24. connected.

Each brake lever 38,40 is fitted with a brake shoe 46.48 for contacting the outer circumferential surface of the flywheel 14. The brake shoes 46 and 48 are made of a material with a high coefficient of friction, such as synthetic rubber or felt, and generate a load due to friction between them and the flywheel 24. Brake shoe 46.48 is brake lever 3
8.40, respectively, and more preferably, the brake lever 38 is fixed to the brake lever 38 so that the brake shoes 46.48 can make good contact with the outer circumferential surface of the flywheel 24.
．． It may be attached to be swingable with respect to 40. In addition, in FIG. 2, the brake shoes 46, 48 are attached to the opposite side of the brake lever 38, 40 in the figure; The brake shoe may be attached to the inner surface of the brake lever, that is, the surface facing the outer peripheral surface of the flywheel 24.

In this embodiment, the brake lever 38.40 is configured to protrude from the arm 36 in the direction of rotation of the flywheel 24, but the present invention is not limited to this. It may be attached so as to protrude in the direction opposite to the rotational direction.

Further, in this embodiment, in order to simplify the structure, the arm 36 is a rod-like member that does not extend or contract, and the load generated by swinging the brake levers 38 and 40 attached to both ends of the arm 36 can be changed. However, arm 36
The arm itself may be extendable and retractable in the diametrical direction of the flywheel 24, and the flywheel 24 may be sandwiched from the outer peripheral surface in the diametrical direction by brake levers and brake shoes attached to both ends of the extendable arm.

Between the brake levers 38 and 40 is a rod 50. It is connected by a coil spring 52 and a wire 54. bar 50
One end thereof passes through the brake lever 38 and is attached from the outside of the brake lever 38 with a nut 51.

The other end of the rod 50 is connected to the wire 5 via a coil spring 52.
It is connected to one end of 4. The wire 54 passes through the brake lever 40 and extends to the outside of the brake lever 40. A wire 54 extending outside the brake lever 40 is covered with an outer tube 56, and its tip is connected to the frame 1.
2 is attached to a load adjuster 58 attached by an attachment member 57. The outer tube 56 is a flexible tube that does not expand or contract, and is arranged between the brake lever 40 and the load adjuster 50 with some margin in length. The load adjuster 58 includes an adjustment knob 60 and a housing 62, and adjusts the tension of the wire 54 by adjusting the screw of the adjustment knob 60.

In this embodiment, the load adjuster 58 is connected to the tip of the wire 54 protruding through the outer tube 56, but the load adjuster 58 is directly mounted on the brake lever 40, eliminating the need for the outer tube 56. It is also possible to have a configuration in which

At the rear end of one brake lever 40 is a medium 1IIIs material 6.
A load detector 28 is connected via 4.

Here, in order to sensitively and optimally detect the movement of the brake shoe 48, that is, the brake lever 40, which attempts to move in the same direction as the flywheel 24 rotates in the six directions, the relay member 64 is connected to the flywheel 24. The coil spring 66 extends in the tangential direction of the contact point of the 24 brake shoes 48, and on the extension thereof, a coil spring 66 whose rear end is fixed to the frame 12 is stretched in a tensioned state (somewhat under tension).

A buff 768 for absorbing vibrations of the coil spring 66 is attached in parallel to the fill spring 66, and a converter 70 is provided for detecting the amount of expansion of the coil spring 66 and converting it into a change in electrical impedance. It is being

Figures 3 and 4 are 1. the coil spring 66;
Load detector 28 consisting of buffer 68 and converter 70
It is a figure showing an example of composition.

In FIG. 3, a converter 70 that converts into a resistance value is shown. That is, with reference to FIG. 3, a plurality of resistors Ro=Rs (many resistors) connected in series (the number of resistors is not limited to 10, but as a general rule, a larger number is preferable) and each of these resistors. Contacts Po = Ps arranged in the length direction of the coil spring 66 connected to each other, and a conductive rubber roller that moves over each contact Po = Ps as the coil spring 66 expands and contracts. A sliding contact 72 is included. A variable resistance circuit including the resistor R1 contact P1 conductive rubber roller 72, support member 74, coil spring 66, and support member 76 constitutes a part (resistance portion) of an RC oscillation circuit to be described later.

Note that the above-mentioned converter 70 has a plurality of fixed resistances Ro=R
9, but a sliding resistor whose resistance value changes continuously may also be used.

FIG. 4 is a diagram showing an example of a converter that converts changes in the amount of expansion and contraction of the coil spring 66 into changes in inductance.

In the load detector 28 shown in FIG. 4, the converter 71 includes a coil 78 made of copper wire or the like, and an O-rad of a magnetic material such as ferrite that moves inside the coil 78 as the coil spring 66 expands and contracts. It is made up of.

Next, the operation will be explained with reference to FIGS. 1 and 2.

When the adjustment knob 60 of the load regulator 58 is rotated and the wire 54 is pulled, the brake levers 38, 40 are rotated inwardly (towards each other) about the coupling pins 42, 44, respectively. As a result, each brake shoe 46.48 is pressed against the outer circumferential surface of the flywheel 24, a frictional resistance is generated between the brake shoe 46.4B and the outer circumference of the flywheel 24, and the brake torque (load) is applied to the flywheel 24. ) is added.

In addition, the force of pressing each brake shoe 46,413 against the outer circumferential surface of the brake shoe 46,413 at the time of compression is transmitted between the brake levers 38 and 40 or by the action of the coil spring 52, since the brake levers 38 and 40 are connected through the intervening coil spring 52. Pressed with equal force.

Therefore, when the flywheel 24 is loaded with an equal force from both outer peripheral surfaces in the diametrical direction,
Even under load, its rotation is extremely smooth.

Further, in this embodiment, the amount of protrusion of the rod 50 that protrudes from the brake lever 38 can be adjusted by a nut 51. In this case, the load adjustment amount range by the load adjuster 58 can be adjusted.

When the brake shoes 46, 48 are pressed against the flywheel 24 rotating in the direction, each brake shoe 46, 48 also tries to move in the direction of the arrow, following the rotation of the flywheel 24 in the direction of the arrow. Lever 40. The coil spring 66 is pulled through the relay member 64 against its tension.

Then, when the coil spring 66 is extended to the state in which it is formed, it is balanced. And the coil spring 6 at this time
6 is proportional to the circumferential force F applied to the outer peripheral surface of the flywheel 24. The equation between this force F and the radius r of the flywheel is the torque around the axis of the flywheel 24. If G is the rotational speed ratio of the flywheel 24 and the drive wheel 20, that is, the speed increase ratio, then Ignoring power transmission loss, the torque T around the axis of the drive wheel 20, that is, around the axis applied to the pedal 18, is calculated as T-G-F-r.In the above equation, the speed increasing ratio G and the flywheel Since the radius r of 24 is constant, the torque T
In other words, the force F1 in the circumferential direction applied to the outer periphery of the flywheel 24 is proportional to the amount of extension of the coil spring 66. The amount of extension of the coil spring 66 is converted into an amount of electrical resistance by the load detector 28 described above.Next, the amount of extension of the coil spring 66 is converted into a torque based on the amount of electrical resistance. The circuit for calculating T will be explained. Figure 5 is the display! 2 is a block diagram not showing the electrical circuit configuration built into the ff32 (see FIG. 1); FIG. FIG. 5 shows an RC oscillation circuit 82 that uses changes in electrical resistance as shown in FIG. 3, and an LC oscillation circuit 8 that uses changes in inductance as shown in FIG.
4 is also written, but in reality, the RC oscillation circuit 82
Alternatively, either the LC oscillation circuit 84 is used.

In the RC oscillation circuit 82, the oscillation frequency f changes as the resistance R (this resistance R is the variable resistance shown in FIG. 3 mentioned above) changes. The voltage signal having the oscillation frequency f is then given to the CPU 86. If you use an oscillation circuit to treat changes in electrical impedance as changes in oscillation frequency, you can directly give a signal to the CPLJ86, eliminating the need for an analog/digital converter, etc.
This has the advantage of simplifying the circuit configuration. Further, the rotation speed signal of the pedal 18 detected by the rotation speed detector 30 is also
Given to U86. The CPU 86 measures the period t of the voltage signal with the frequency ", and calculates the torque T around the rotation axis of the pedal 18 using T-f (t). The function f(t) at this time is the same as that in the embodiment. This is a function that can be determined experimentally based on the characteristics of the coil spring 66 of the exerciser, the characteristics of the oscillation circuit, etc. Therefore, it is sufficient to determine this function at the prototype stage and set the determined function in the CPLJ 86.

Furthermore, instead of measuring the circumference I]t as described above, it is also possible to measure the frequency n and calculate it by T=f - (n).

Further, the torque value T can also be converted into a power such as WATTill based on the rotation speed of the pedal 18 given from the rotation speed detector 30.

The torque T and power around the pedal rotation axis determined by the CPU 86 are displayed on a known liquid crystal display 88 included in the display device 32 so that the user can easily read them.

[Effects of the Invention] According to the present invention, it is possible to provide a pedal-linked exerciser in which a load is applied to the flywheel in a well-balanced manner, the flywheel rotates smoothly, and the user can perform a comfortable exercise.

In addition, the load is not an electrical load such as an electromagnet, but
It is assumed that the load is mechanical, and the device can have a simple structure.

Furthermore, since load detection and conversion to an electrical signal are performed with a simple structure, the device can be manufactured at low cost and with fewer failures.

Furthermore, since the load is detected based on how much the coil spring 66 expands and contracts from its initial state,
It is possible to provide an accurate device that does not require the user to perform zero point adjustment of the load detector.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention. FIG. 2 is a partially enlarged view for explaining the load mechanism. FIG. 3 and FIG. 4 are diagrams showing the configuration of the load detector. FIG. 5 is a block diagram showing the configuration of an electric circuit for load detection and display. In the figure, 10 is a pedal exerciser, 12 is a frame, 18 is a pedal, 24 is a flywheel, 26 is a load mechanism, 28 is a load detector, 30 is a rotation speed detector, 36
is the arm, 38.40 is the brake lever, 46.48 is the brake shoe, 52 is the coil spring, 54 is the wire, 56 is the outer tube, 58 is the load adjuster, 64
6 is a relay member, 66 is a coil spring, 68 is a buffer, and 70 is a converter. Fig. 1 28: ψ4tI scooper

Claims (12)

[Claims] (1) A pedal movement type exerciser comprising a flywheel attached to a frame and a pedal crank for driving the flywheel, the pedal crank being rotatably attached coaxially with the axis of the flywheel, and a pedal crank for driving the flywheel. an arm extending in the diametrical direction of the arm; a load generating means that is swingably attached to each end of the arm and that comes into contact with the outer peripheral surface of the flywheel to generate a load due to friction; a connecting means that extends between the two load generating means and pulls the load generating means inward; and a load adjustment that adjusts the load generated by the load generating means by adjusting the tension of the connecting means. means, an elastic member having one end attached to either one of the load generating means and the other end fixed to the frame, the elastic member expanding and contracting in accordance with the movement of the load generating means which moves with the rotation of the flywheel; Conversion means for converting changes in the amount of expansion and contraction of the elastic member into changes in electrical impedance, oscillation means for oscillating at a frequency that changes based on the changes in the converted electrical impedance, and work for converting the oscillation frequency into work. A pedal exerciser including a measuring means. (2) The claim that the load generating means includes a brake lever that is swingably attached to the arm, and a brake shoe that contacts the outer peripheral surface of a flywheel that is fixed to the inside of the brake lever. The pedal exercise type exerciser according to item 1. (3) The pedal exerciser according to claim 2, wherein the brake lever is attached so as to protrude from the end of the arm in the rotating direction of the flywheel. (4) The pedal exerciser according to claim 1, 2, or 3, wherein the connecting means includes a wire and a coil spring. (5) One end of the wire constituting the connecting means extends outside through the one loading means, and the load adjusting means is a flexible wire through which the wire extending outside the one loading means is inserted. 5. The pedal motion type exerciser according to claim 4, comprising a flexible outer tube and wire tensioning means provided at a distal end of the outer tube. (6) The pedal exercise type exerciser according to claim 1 or 5, wherein a relay member extending in a tangential direction of the flywheel is inserted between the load generating means and the elastic member. . (7) The pedal exerciser according to claim 6, wherein the relay member extends in a tangential direction opposite to the rotating direction of the flywheel, and the elastic member is a coil spring. (8) The elastic member is provided with a buffer in parallel to absorb sudden expansion and contraction.
7. The pedal exerciser according to item 7 or 7. (9) The pedal exerciser according to claim 1, wherein the change in electrical impedance is a change in resistance value or reactance. (10) The means for converting changes in the amount of expansion and contraction of the elastic body into changes in electrical resistance includes a plurality of contacts having different fixed electrical resistance values arranged on a printed circuit board and moving over the contacts. 10. The pedal exerciser according to claim 9, further comprising a conductive slider for selecting any electrical resistance value. (11) Claim 9, wherein the means for replacing the change in the amount of expansion and contraction of the elastic body with a change in electrical resistance value is a sliding resistance device that slides in response to the expansion and contraction of the elastic body. Pedal type exerciser. (12) The pedal crank is equipped with a rotation speed detection sensor for detecting the rotation speed of the pedal crank, and the output of the sensor is provided to the workload measurement device. 12. The pedal exerciser according to any one of items 1 to 11.