JPH0732810B2 - Bicycle exercise equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for stepping on a pedal of a bicycle for exercise, and more particularly to a bicycle type exercise apparatus capable of weakening driving torque at the top dead center and the bottom dead center of the petal.

[0002]

2. Description of the Related Art A bicycle-type exercise device has a structure in which a brake wheel braked by a brake is rotated by stepping on a petal. The motion device having this structure has a drawback that it is difficult to rotate the petal between the top dead center and the bottom dead center. This is especially true when the brakes on the brake wheels are strengthened. Bicycles running on ordinary roads can move smoothly due to inertia when Petal passes through the top dead center and the bottom dead center. However, the motion device that brakes the braking wheel to rotate the braking wheel always brakes the braking wheel, and thus has a drawback that the petal becomes considerably heavy at the top dead center and the bottom dead center.

In order to solve this drawback, the mechanism described in the following publications has been developed. Japanese Unexamined Patent Publication No. 59-125573 and Japanese Utility Model Publication 59
-87853 JP, JP-A-56-85366, JP-A-56-15768, JP-B-56-166058

In the exercise device described in the above publication, the chain wheel that rotates with the petal has an elliptical shape, and has a mechanism that changes the rotational torque with respect to the rotational position of the petal. This structure is similar to a normal bicycle in that the wheels are rotated by a chain attached to a chain wheel and the wheels are braked by braking means.

In the exercise device described in the above publication, the rotational position of the petal is electrically detected by a sensor, and the braking force of the brake is electrically changed by the output of the sensor. That is, when the petal passes near the top dead center and the bottom dead center, the braking force of the braking means is adjusted to be small so that this portion is easily rotated.

The exercise device described in the publication has a mechanism in which a rotating body rotated by a petal is capable of lightly rotating a top dead center and a bottom dead center by changing a braking force depending on a rotation position.

Further, the exercise device described in (1) also has a mechanism for reducing the load at the top dead center and the bottom dead center of the crank rotated by the petal.

[0008]

The exercise device described in the publication has the feature that the mechanism can be simplified, but has the drawback that the rotational torque cannot be adjusted so weakly near the top dead center and the bottom dead center. The reason is that the ratio of the major axis to the minor axis of the elliptical chain wheel rotated by the crankshaft cannot be increased so much.

The exercise device described in the publication has a feature that the rotating torque can be controlled in an ideal state. However, the device of this structure uses a microcomputer or the like for the control circuit, and therefore has a drawback that the device becomes complicated and becomes extremely expensive. Furthermore, the devices described in and also have the drawback that the mechanism for changing the rotational torque of the crankshaft is complicated and expensive.

The present invention was developed for the purpose of solving this drawback, and an important object of the present invention is to achieve a rotating torque in the vicinity of top dead center and bottom dead center with an extremely simple mechanism. There is a bicycle-type exercise device that can be reduced to a normal state.

[0011]

A bicycle-type exercise device includes a crankshaft 2 provided with a bicycle petal 1, a drive member 3 which is connected to the crankshaft 2 and is rotated, and a drive member 3 which is rotated. A braking wheel 4 for braking and a braking means 5 for braking the rotation of the braking wheel 4 are provided. The drive member 3 and the braking wheel 4 have all the configurations (a) to (g) below.

(A) The braking wheel 4 is provided with a plurality of slits 6 at equal intervals in the radial direction from the outer circumference toward the center so that the braking wheel 4 can be rotated by the driving member 3. (B) The drive member 3 has a crank arm 7 for rotating the braking wheel 4. (C) A sliding pin 8 that extends in the direction of the rotation axis of the driving member 3 and slides in the slit 6 to rotate the braking wheel 4 is connected to the tip of the crank arm 7 of the driving member 3. . (D) The outer shape of the sliding pin 8 is designed so that it can slide in the slit 6 of the braking wheel 4. (E) The drive member 3 and the braking wheel 4 are arranged so that the rotation axes thereof are parallel to each other. (F) The braking wheel 4 is configured to rotate via the sliding pin 8 when the sliding pin 8 slides in the slit 6 of the braking wheel 4. (G) The relative positions of the petal 1, the sliding pin 8 and the slit 6 are such that when the petal 1 is located at the top dead center and the bottom dead center, the sliding pin 8 is located near the outer peripheral edge of the slit 6. To position.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below are examples of devices for embodying the technical idea of the present invention, and the device of the present invention has the following materials, shapes, structures, and arrangements of components. Not specific. The device of the present invention can be variously modified within the scope of the claims.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims" and "means for solving the problems." It is added to the members shown in "Column". However, the members shown in the claims are not limited to the members of the embodiment.

The bicycle type exercise apparatus shown in the side view of FIG. 1 and the plan view of FIG. 2 has a crankshaft 2, a driving member 3 which is connected to the crankshaft 2 and is rotated, and a driving member 3 which is rotated. A braking wheel 4 for braking and a braking means 5 for braking the rotation of the braking wheel 4 are provided.

The crankshaft 2 has the same structure as an ordinary bicycle. That is, the petals 1 are connected to each other in a direction of 180 degrees and are rotatably attached to a frame (not shown) via bearings.

The driving member 3 drives the braking wheel 4 to rotate, and is rotated by the crankshaft 2. Drive member 3
Is provided with two crank arms 7 extending in parallel with the arms of the crank shaft 2 connecting the petals 1 and a sliding pin 8 connected at a right angle to the tip of the crank arm 7. The crank arm 7 has one end connected to the center of the crankshaft 2 and the other end connected to the sliding pin 8. The length of the crank arm 7 is such that the sliding pin 8 has the slit 6 of the braking wheel 4.
Is designed to have a radial length at the outer peripheral edge. The sliding pin 8 is designed in a cylindrical shape having an outer shape slightly narrower than the width of the slit 6 so that the sliding pin 8 can slide along the slit 6 of the braking wheel 4.

The braking wheel 4 is provided with a plurality of slits 6 in the radial direction from the outer circumference toward the center. The braking wheel 4 shown in FIG. 1 is provided with six slits 6 radially so as to form an angle of 60 degrees with each other. When the sliding pin 8 slides on the slit 6, the braking wheel 4 is rotated by the driving member 3. Therefore, the total length of the slit 6 is designed to be longer than the moving amount of the sliding pin 8.

The rotation axis of the braking wheel 4 is arranged parallel to the rotation axis of the drive member 3. The relative positions of the petal 1, the sliding pin 8 and the slit 6 are such that the sliding pin 8 is located near the outer peripheral edge of the slit 6 when the petal 1 is located at the top dead center and the bottom dead center. Designed to. In the bicycle-type exercise device shown in FIG. 1, the rotary shaft of the drive member 3 is arranged at a position where the tangents of the openings of the slits 6 adjacent to each other intersect.
When the rotation axes of the braking wheel 4 and the drive member 3 are set to the positions shown in FIG.
Move in the radial direction. Therefore, when the sliding pin 8 moves along the opening edge of the slit 6, the braking wheel 4 does not rotate, and the sliding pin 8 can be smoothly guided to the slit 6.

However, according to the present invention, as shown in FIG. 1, the rotation axis of the driving member 3 is not necessarily adjacent to the slit 6.
It is not necessary to arrange them at the positions where the tangents of the opening edges of the intersect. For example, as shown by a point A in FIG. 1, it is arranged at a position moved from a point B where tangents intersect to the center of the braking wheel 4 or at a point moved from the point B in a direction opposite to the center of the braking wheel 4. You can also do it. The sliding pin 8 of the drive member 3 having the rotating shafts at the points A and C does not move in the radial direction of the braking wheel 4 at the opening edge of the slit 6. Therefore, the slit 6 is
As shown by the chain line in FIG. 1, it is preferable that the opening is widely processed into a taper so that the sliding pin 8 can be smoothly guided to the slit 6. The tapered slit 6 can also smoothly guide the sliding pin 8 that moves in the radial direction at the opening edge to the slit 6.

The present invention does not specify the number of slits provided in the braking wheel. The braking wheel 4 shown in FIG. 4 is provided with eight slits 6 at equal angles to each other. According to this structure, the rotation axis of the drive member 3 approaches the rotation axis of the braking wheel 4, and the distance that the sliding pin 8 moves outside the slit 6 can be shortened. However, in this structure, the braking wheel 4 is larger than the driving member 3.

The braking wheel 4 is braked by the braking means 5. The braking means 5 can be used from any structure capable of braking the rotation of the braking wheel 4. In the bicycle-type exercise device shown in FIG. 1, a brake drum 9 is fixed to a brake wheel 4, a brake band 10 is applied to the brake drum 9, and this is pulled with a constant force to brake the rotation of the brake wheel 4. ing. When the brake band 10 is strongly pulled, the braking means 5 increases the frictional resistance between the brake drum 9 and the brake band 10 and can apply a stronger brake.

A saddle 11 is provided above the crankshaft 2 and sits there to step on the petal 1 for exercise. However, the present invention does not specify the position of the saddle 11 above the crankshaft 2. Petal 1 when sitting in a chair
A bicycle-type exercise device capable of stepping on is made to horizontally approach the positions of the crankshaft and the saddle. No matter where the saddle is placed, the sliding pin and the slit should move so that the sliding pin moves around the outer peripheral opening end of the slit when the petal is stepped on by the foot and passes through the top dead center and the bottom dead center. And.

[0024]

The bicycle-type exercise device of the present invention has a feature that the rotating torque at the top dead center and the bottom dead center of the petal can be extremely reduced by a simple mechanism. This is because, as shown in the torque curve of FIG. 3, when the petal passes through the top dead center and the bottom dead center, the rotational torque of the petal is significantly reduced.
The torque decreases at the top dead center and the bottom dead center because the sliding pin moves in the radial direction of the brake wheel and does not rotate the brake wheel when the petal moves at this position. Therefore, the bicycle-type exercise device of the present invention is characterized in that it can efficiently step on the petal in an ideal state and exercise effectively.

Further, the bicycle type exercise apparatus of the present invention is
Compared to a structure that detects the rotational position of the petal and controls the braking torque, it has an extremely simple mechanism to achieve ideal rotational torque characteristics, can be mass-produced at low cost, has few failures, and is easy to maintain. Realize the features that can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing the operation principle of a bicycle-type exercise device showing an embodiment of the present invention.

FIG. 2 is a plan view of the bicycle-type exercise device shown in FIG.

FIG. 3 is a graph showing a torque curve of the bicycle exercise device shown in FIG.

FIG. 4 is a schematic side view of a bicycle type exercise device showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Petal 2 ... Crankshaft 3 ... Drive member 4 ... Brake wheel 5 ... Brake means 6 ... Slit 7 ... Crank arm 8 ... Sliding pin 9 ... Brake drum 10 ... Brake band 11 ... Saddle

Claims (1)

[Claims] 1. A crankshaft (2) provided with a bicycle petal (1), a drive member (3) connected to the crankshaft (2) and rotated, and a drive member (3) rotated. Brake wheel (4)
And a braking means (5) for braking the rotation of the braking wheel (4), and the drive member (3) and the braking wheel (4) have the following (a).
A bicycle-type exercise device having all the configurations from (g) to (g). (A) The braking wheel (4) is provided with a plurality of slits (6) extending in the radial direction from the outer circumference toward the center and forming an equal angle with each other. (B) The drive member (3) has a crank arm (7). (C) At the tip of the crank arm (7) of the drive member (3),
Sliding pins (8) are connected by extending in the direction of the rotation axis of the drive member (3). (D) The outer shape of the sliding pin (8) is the slit of the braking wheel (4).
The width is slidable in (6). (E) The drive member (3) and the braking wheel (4) are arranged so that the axes of rotation are parallel to each other. (F) The sliding pin (8) slides in the slit (6) of the braking wheel (4) so that the braking wheel (4) is rotated through the sliding pin (8). There is. (G) The relative positions of the petal (1), the sliding pin (8), and the slit (6) are such that when the petal (1) is located at the top dead center and the bottom dead center, the sliding pin (8) ) Is located near the outer peripheral edge of the slit (6).