JPS632052Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an exercise device, in particular, a frame having a seat, a drive body supported by the frame and having a crank driven by foot operation, and a drive body rotatably supported by the frame. The present invention relates to an exercise device including a rotating body having a driven body that rotates by the drive of the crank, a transmission body that transmits the drive of the driving body to the driven body, and a load device that provides resistance to the rotation of the rotating body.

Conventionally, this type of exercise device uses a load device to apply a load to a rotating body that is rotated by the drive of a crank.
Since a constant load is applied to the entire rotation of the rotating body, the load acting on the rotating body is constant during one rotation of the rotating body, whereas training is performed while the crank rotates once. The crank rotation moment for those who exercise varies depending on the position of the crank, and as a result, the amount of exercise required for training is less than that, which can lead to fatigue.

That is, the crank rotational moment changes so that it becomes almost maximum when the crank rotates 90 degrees from top dead center, and becomes minimum when the crank is located at top dead center and bottom dead center. When the pedal is located near the above-mentioned top dead center and near the bottom dead center where only the minimum rotational moment can be obtained, when operating the pedal, a large pedal force greater than the predetermined pedal force is required, making the pedal depression heavy. When the pedal is located between near the top dead center and near the bottom dead center, the pedal can be lightly depressed using the crank rotational force generated by the predetermined pedal effort.

Therefore, during one rotation of the crank, approximately 1/
Since the pedal pressure becomes heavier in the cycle of two revolutions, the larger the load, the less stable pedal operation will be possible, resulting in jerky pedal operation, and the degree of fatigue will be large relative to the amount of pedal operation. However, if the amount of exercise is less than the required amount for training, it gives a feeling of fatigue, and it is not possible to train for more than the prescribed amount of exercise.

The purpose of this invention is to increase or decrease the amount of load in response to the training person's pedal force increasing or decreasing depending on the rotational position of the crank, so that stable pedal operation is always possible and there is no excess or deficiency. This allows for proper training.

The configuration of the present invention is such that the driving body has a substantially elliptical shape having a major diameter part and a minor diameter part, and the rotary body is arranged so that the driving body has a substantially elliptical shape having a major diameter part and a minor diameter part, and the rotating body is arranged so that the driving body has a substantially elliptical shape having a major diameter part and a minor diameter part, and the rotating body is arranged so that the driving body has a substantially elliptical shape having a major diameter part and a minor diameter part. The load device is configured to be movable toward and away from the crank, biased in the direction away from the crank by a spring, and the load device is disposed on the moving direction side of the rotating body, so that when the rotating body moves toward the approaching direction, the load device It is characterized in that the magnitude of the load can be varied in response to the pedaling force which changes as the load applied to the body increases.

Embodiments of the device of the present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 denotes a frame, in which a stand 13 with a handle 12 and a stand 15 with a seat 14 are erected on a base frame 11 at a fixed distance apart in the front and rear direction, and an upper part is provided between the stands 13 and 15. It is connected and supported by a rod 16 and a horizontal lower rod 17.

The frame 1 is provided with a drive mechanism 2 that is driven by foot operation. That is, stand 15
A first chain gear 21 as a driving body is provided at the connecting portion between the lower rod 17 and the lower rod 17 to freely rotatably support a crank 22 driven by foot operation, and the lower rod 17 is extended forward from the connecting position of the stand 13. A second chain gear 23 as a driven body and a rotating body 24 rotating together with the second chain gear 23 are rotatably supported by the hub shaft 25 on the extended portion, and the first and second chain gears 2
A transmission body 26 consisting of a chain is hung between the cranks 1 and 23, and the rotating body 24 is rotated by the drive of the crank 2. Further, a load device 3 is attached to the rotating body 24 to provide resistance to the rotation of the rotating body 24.

Therefore, in the exercise device configured as described above, the present invention moves the rotating body 24 toward and away from the crank 22 along the moving direction of the transmission body 26 driven by the rotation of the crank 22. Possibly, the load device 3 is biased in the separating direction by a spring 4 and is disposed on the front side in the approaching direction of the rotating body 24, so that when the rotating body 24 moves in the approaching direction, the loading device 3 is biased in the separating direction. The result was an increase in the load placed on the system.

What is shown in the drawings mainly includes a first bracket that supports the upper and lower portions of the front extension of the lower rod 17 and has mounting portions 51 and 52 that extend upward and downward, respectively, as shown in FIGS. 2 and 3. 5, and has mounting parts 61 and 62 facing the mounting parts 51 and 52 on the outside of the bracket 5,
A second bracket 6 curved outwardly is arranged between the mounting parts 61 and 62, and the mounting parts 51 and 6
1, 52, and 62 are connected by tightening bolts _B1 and _B2 , and a cylindrical guide body 7 is disposed between the lower rod body 17 and the second bracket 6, and the guide body 7 by tightening the tightening bolts B ₁ and B ₂ ,
It is fixed to the lower rod 17. And the guide body 7
Elongated holes 63 and 171 are provided in the second bracket 6 and the lower rod 17 at the rear of the hub shaft 25, through which the ends of the hub axle 25 pass through and which are movable in the front-rear direction.
3, 171 through the hub axle 25, and attach the retaining bolt _B3 to the end thereof. Additionally, grooves 71, 71 are provided above and below the cylindrical hole of the guide body 7, and as shown in FIGS. A movable body main body 81 that is freely movable in the length direction of the hole, and the main body 81
a locking part 82 that locks the rear part of the spring 4 at the front part of the main body 81;
A moving body 8 having a support portion 83 that supports the hub shaft 25 is provided. Further, the first bracket 5
The upper and lower portions are extended forward, and a locking member 9 is provided between both ends of the upper and lower portions, and the member 9 and the movable body 8 are connected to each other.
The spring 4 is provided between the hub shaft 25 and the locking portion 82 to urge the hub shaft 25 in a direction away from the crank 22.

In addition, the load device 3 attaches a box 31 to the lower rod 17, and connects a pressure contact body 32 that rotates by pressing against the outer peripheral surface of the rotary body 24 to the rotary body 24.
4, the pressure contact body 32 is pivotally supported on the front part of the rod 33 facing backward, and the rear side of the rod 33 is pushed into the inside from the front part of the box 31, and a flange 33a is attached to the protruding base. At the same time, an adjusting rod 34 having an adjusting knob 34a is screwed into the box 31 from the rear thereof so as to be freely advanced and retracted.
4 and the flange 33a of the rod 33.
is inserted to urge the pressure contact body 32 forward. The relationship between the first and second chain gears 21, 23 and the crank 22 is as follows.

That is, the second chain gear 23 is made circular, the first chain gear 21 is made approximately oval and non-circular, and the crank 22 is made circular, and the crank 22 is made circular.
When the crank is positioned in the vertical direction, the long diameter part and the short diameter part of 1 are at horizontal rotational positions, for example, where the pedal force on the pedals is maximum, based on the driving posture in which the person doing the training depresses the pedals, For example, the greater the pedal force is, the more the first chain gear 21, through the transmission body 26, applies the second chain gear 23 and the rotating body 24 to the tensile force of the spring 4. This is done so that the load applied to the rotary body 24 by the load device 3 is increased by moving it largely in the direction approaching the load device 3.

Therefore, when a person training with the above configuration rotates the cranks 22, 22, if the long diameter part of the first chain gear 21 faces in the vertical direction where maximum pedaling force can be exerted, , the transmission body 26 is tensioned to the maximum, and the amount by which the second chain gear 23 is moved in the direction of the first chain gear 21 is maximized, so that the rotating body 24, which is moved together with the second chain gear 23, becomes the load device 3. The maximum load is applied to the rotating body 24 from the load device 3 corresponding to the maximum pedal force. Further, the first chain gear 2
When the short diameter portion of the pedal 1 faces in the vertical direction where only the minimum pedal force can be exerted, the transmission body 26 is tensioned to the minimum, and the second chain gear 23 is moved in the direction of the first chain gear 21. Therefore, the amount by which the rotating body 24 approaches the load device 3 becomes the minimum, and the load device 3 applies a minimum load to the rotating body 24 that corresponds to the minimum pedal force.

As described above, the load applied to the rotating body 24 by the load device 3 changes from the maximum value to the minimum value in response to the change in the stepping ability of the training person's foot from the maximum value to the minimum value due to the rotation of the crank 22. As a result, the crank 22 rotates smoothly at a constant speed, and training can be performed with a pedaling force that corresponds to the pedaling ability of the foot over the entire rotation range of the crank 22. As a result, the overall In addition, it is possible to operate the pedals stably without putting an unreasonable load on them, and it is possible to perform training with an appropriate amount of exercise, without excess or deficiency.

In the above description, the rotating body 24 is moved toward and away from the crank 22 along the moving direction of the transmission body 26 by the rotation of the crank 22.
Although the first chain gear 21 was intended to be formed into a non-circular shape and the second chain gear 23 was formed into a circular shape, conversely, the first chain gear 21 may be formed into a circular shape and the second chain gear 23 may be formed into a non-circular shape. Both chain gears 21 and 23 may be formed into different non-circular shapes.

Further, the load device 3 includes both chain gears 21,
The lower rod 17 that connects the pivot parts of the rotating body 23 is provided with a structure on the moving direction side of the rotating body 24, which increases the load applied to the rotating body 24 when the rotating body 24 moves in the approaching direction. It can be placed at each location.

Further, the first and second chain gears 21 and 23
are intended to be installed horizontally, but they may also be installed vertically, thereby reducing the installation area.

As described above, according to the present invention, it is possible to increase or decrease the magnitude of the load in response to the increase or decrease in the pedal force applied by the training person depending on the rotational position of the crank. The crank can be rotated smoothly at a constant speed, and training can be performed with constant pedal operation without jerkiness throughout the crank's rotation range, allowing for efficient training with just the right amount of exercise. It can be done.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a partial cross-sectional side view around a hub shaft that supports a rotating body, and Fig. 3 is taken along line X-X in Fig. 2. FIG. 4 is a cross-sectional view of the load device, and FIG. 5 is a perspective view of the movable body. 1... Frame, 14... Seat, 22... Crank, 24... Rotating body, 26... Transmission body, 3...
Loading device, 4...spring.

Claims (1)

[Scope of utility model registration request] a rotating body having a frame having a seat, a driving body having a crank supported by the frame and driven by foot operation, and a driven body rotatably supported by the frame and rotated by the drive of the crank; An exercise device comprising a transmission body that transmits the drive of a driving body to a driven body and a load device that provides resistance to the rotation of the rotary body, the driving body having a major diameter portion and a minor diameter portion. The rotating body is movable toward and away from the crank along the moving direction of the transmission body driven by the rotation of the crank, and is urged in the direction away from the crank by a spring. An exercise device characterized in that a load device is disposed on the moving direction side of the rotating body, and increases the load applied to the rotating body when the rotating body moves in the approaching direction.