CN111097136B

CN111097136B - Sports equipment for leg exercise

Info

Publication number: CN111097136B
Application number: CN201811267340.5A
Authority: CN
Inventors: 廖宏茂; 陈福安
Original assignee: Qiaoshan Health Technology Shanghai Co ltd
Current assignee: Qiaoshan Health Technology Shanghai Co ltd
Priority date: 2018-10-29
Filing date: 2018-10-29
Publication date: 2021-06-15
Anticipated expiration: 2038-10-29
Also published as: CN111097136A

Abstract

The invention relates to a sports apparatus for leg exercise, in a preferred embodiment, the top ends of a left linkage piece and a right linkage piece are guided to move on a circular track and keep opposite, and the bottom end of each linkage piece is pivoted with a swinging piece capable of swinging, so that when the top ends circularly move along the circular track, the bottom ends can reciprocate along an arc track; the left and right support members for supporting the feet of the user are respectively pivoted between the top ends and the bottom ends of the left and right linkage members and can move along a closed track; a control part is arranged between the supporting part and the swinging part of each side edge and used for guiding a certain part of the supporting part and a certain part of the swinging part to move relatively along a preset path, so that the angle of the supporting part of each side edge relative to the linkage part is changed along with the angle of the swinging part relative to the linkage part.

Description

Sports equipment for leg exercise

Technical Field

The present invention relates to exercise equipment, and more particularly to exercise equipment for leg exercise.

Background

Fig. 1 shows a sporting apparatus 90 disclosed in us 9,199,115, which is used for a user to perform leg exercise in which feet alternately raise upward and lower downward, in order to provide the leg exercise, the sporting apparatus 90 mainly comprises a revolving mechanism 91, left and right guide rails 92 (note: the two are arranged in parallel, only the left guide rail is shown in the figure), left and right reciprocating members 93, left and right rollers 94, and left and right pedals 95, wherein each guide rail 92 is an inclined straight bar with a front elevation angle of about 60 degrees, the revolving mechanism 91 is disposed above the guide rails 92, the top end of each reciprocating member 93 is pivotally connected to the outer end 911 of the corresponding crank arm of the revolving mechanism 91, the bottom end of each reciprocating member 93 extends rearward while being bent, and a roller 94 capable of rolling and displacing on the corresponding guide rail 92 is disposed in front of the bent portion, so that when the top end of the reciprocating member 93 circularly moves along a circular track CP guided by the crank arm 911, the portion of the reciprocating member 93 provided with the roller 94 at the bottom end reciprocates between a first end E1 at the upper front and a second end E2 at the lower rear along a reciprocating path RP guided by the guide rail 92; the pedals 95 for supporting the feet of the user are fixedly arranged behind the bent parts of the reciprocating members 93, and based on the structure, the left and right pedals 95 can be oppositely lifted and lowered when being properly stressed, so that the legs of the user can move.

As can be seen from the above-described structure of the sporting goods 90, the magnitude of displacement of the step 95 (particularly, the toe end closer to the roller 94) at the time of exercise is substantially equal to the distance between the first end point E1 and the second end point E2 of the reciprocating locus RP, that is, substantially equal to the diameter of the circular locus CP. On the other hand, since the pedal 95 is fixed on the reciprocating member 93, during the movement, along with the relative angle between the top end and the bottom end of the reciprocating member 93 presenting a periodic change, the relative angle between the front end and the rear end of the pedal 95 also presenting a corresponding periodic change, for example, during the whole ascending process of the pedal 95, the heel end will deflect to a highest height relative to the toe end, during the whole descending process of the pedal 95, the heel end will deflect to a lowest height relative to the toe end, the angle difference therebetween is equal to the change range of the angle between the top end and the bottom end of the reciprocating member 93, and the angle change range is also increased or decreased along with the size of the circular track CP, in other words, when the circular track CP is larger, the highest height will be higher, the lowest height will be lower, and the angle difference will be larger.

Based on the above-described features of the sporting goods 90, if it is desired to provide the aforementioned leg exercise with a longer foot stroke and a higher leg-raising height, it is basically necessary to lengthen the diameter of the circular trajectory CP, that is, to employ a longer crank arm 911, so that the displacement amplitude of the pedal 95 is correspondingly increased. However, the enlarged circular track CP may increase the angle variation of the pedal 95, which may cause the ankle joint of the user to move at an excessively large angle, and the angle between the lower leg and the foot plate exceeds the proper angle for ergonomics, resulting in discomfort of the foot and even injuries of movement such as tendon and ligament pain. On the contrary, if the crank arm 911 is short to suppress the angle variation range of the pedal 95 within a proper range, the foot stroke and leg raising height of the leg exercise are relatively short and low, and the difficulty and effect of the exercise are limited. Theoretically, it is not practical to shorten the angular variation range of the reciprocating member 93 by increasing the distance from the top end of the reciprocating member 93 to the roller 94, but the effect is not obvious, and it is necessary to greatly increase the longitudinal length of the reciprocating member 93 and the setting height of the revolving mechanism 91 to reduce the angular difference. In summary, the structure of the exercise device 90 has difficulty in achieving both a long pedal stroke and a small (or appropriate range) of pedal angle variation.

Based on the above-described structure of the sporting goods 90, in the course of the step 95 rising from the lowest position to the highest position, the toe end is displaced forward and upward along an oblique trajectory (not shown) substantially parallel to the reciprocating trajectory RP, and the heel end is significantly elevated with respect to the toe end in the first half of the rising stroke; during the step 95 from the highest position to the lowest position, the toe end will move backward and downward along the inclined path, and the heel end will be lowered significantly relative to the toe end in the first half of the downward stroke. At least for one foot, the leg exercise is similar to the stepping in situ, i.e. the knee is lifted by the thigh to make the lower leg and the foot naturally rise (note: when stepping in situ, the raised foot will slightly advance the foot on the ground, not rise vertically), and then the thigh is directly put down to make the foot step back to the original position. This is a little monotonous leg movement, with the feet being raised upward and stepped down along approximately the same path, and without the legs being stepped forward and backward, less overall leg movement and less exercise.

In addition, ideally, it would be desirable to have the foot rest assume the most ergonomic position for each position along the path of the foot rest, and to provide the most natural and comfortable foot support during such leg exercises. However, based on the above-mentioned structure of the exercise device 90, when the heel rises and falls with respect to the toe during the reciprocating movement of the pedal 95, the angle variation behavior of the reciprocating member 93 in the exercise cycle is completely followed, and the angle variation behavior is basically determined by the relative relationship between the circular track CP and the reciprocating track RP, although the angle variation behavior can be changed by adjusting relevant parameters (such as the length ratio of the crank arm 911 to the reciprocating member 93, the inclination and the position of the guide rail 92, and the like) in design, these parameters are limited by the basic structure and the spatial configuration of the exercise device 90 and cannot be changed greatly, and the obtained result usually considers one another, so it is difficult to make an optimal adjustment for the angle variation behavior of the pedal 95.

Disclosure of Invention

In view of the above problems, it is a primary object of the present invention to provide a sports apparatus for a user to perform leg exercises in which the feet of the user alternately raise and lower, and the length of the foot movement stroke in the leg exercises and the range of the foot angle change are not necessarily related to each other.

Another object of the present invention is to provide a sporting goods which allows a user to perform leg exercises in which both feet are alternately raised and lowered, and which is relatively easy to optimize the variation behavior of the foot angle during the exercise in terms of design.

Still another object of the present invention is to provide a sporting goods which allows a user to perform leg exercises in which both feet are alternately raised upward and lowered downward, and the leg exercises include forward striding out and backward retracting movements of the lower leg, and thus the user can exercise a lot of sports in a comprehensive manner.

In order to achieve the above object, the present invention provides an exercise apparatus for leg exercise, comprising: a frame body, which is provided with a first part, a second part and a third part; the left and right linkage pieces are respectively provided with a first part, a second part and a third part; the revolving mechanism is arranged at the first part of the frame body, is connected with the first parts of the left and right linkage pieces, and guides the first parts of the linkage pieces to move along a circular track relative to the frame body; the central axis of the circular track corresponds to the left-right axial direction; the left and right swinging pieces are respectively provided with a first part, a second part and a third part, and the first parts of the left and right swinging pieces are respectively pivoted on the second part and the third part of the frame body, so that each swinging piece can deflect relative to the frame body by taking the first part as an axis; the second part of each swinging piece is pivoted with the second part of the linkage piece on the same side to guide the second part of each linkage piece to move along an arc-shaped track relative to the frame body, so that when the first part of the linkage piece circularly moves along the circular track, the second part of the linkage piece can reciprocate between the first end point and the second end point of the arc-shaped track, and the third part of the linkage piece can circularly move along a closed track relative to the frame body; the left and right supporting pieces are respectively used for supporting the left foot and the right foot of a user; each supporting piece is provided with a first part and a second part, and the first part of each supporting piece is pivoted on the third part of the linkage piece on the same side edge, so that the supporting pieces can deflect relative to the linkage piece by taking the first parts of the supporting pieces as axes; and each control piece is arranged between the second part of the supporting piece and the third part of the swinging piece on the same side, and guides the second part of the supporting piece and the third part of the swinging piece to move relatively along a preset path, so that the angle of the supporting piece on each side relative to the linkage piece is changed along with the angle of the swinging piece relative to the linkage piece.

In the above technical solution of the present invention, in a movement period in which the first portion of the linkage member circles around the circular track for one circle, a maximum angle variation of the support member with respect to the frame body is smaller than a maximum angle variation of the linkage member with respect to the frame body.

The supporting piece on each side is parallel to the deflection axis of the swinging piece on the same side relative to the linkage piece relative to the deflection axis of the linkage piece.

Each control piece is provided with a first part and a second part which are respectively pivoted on the second part of the supporting piece and the third part of the swinging piece on the same side edge; the second part to the third part of the linkage part on each side edge form a first connecting rod, the second part to the third part of the swinging part form a second connecting rod, the first part to the second part of the supporting part form a third connecting rod, and the first part to the second part of the control part form a fourth connecting rod to jointly form a four-bar linkage mechanism.

The motion planes of the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod of the four-bar mechanism on each side are parallel to each other when the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod of the four-bar mechanism on each side move relatively; the lengths of the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod projected on the motion plane are respectively defined as the length of the first connecting rod, the length of the second connecting rod, the length of the third connecting rod and the length of the fourth connecting rod, and the sum of the lengths of the longest connecting rod and the shortest connecting rod in the length of the first connecting rod, the length of the second connecting rod, the length of the third connecting rod and the length of the fourth connecting rod is greater than the sum of the lengths of the other two connecting rods.

Each control piece is provided with a sliding surface, the control piece is fixed on one of the second part of the supporting piece and the third part of the swinging piece on the same side, the other of the second part of the supporting piece and the third part of the swinging piece is pivoted with a roller, and the roller is abutted to the sliding surface and can slide on the sliding surface.

Each control piece is provided with a guide rail, the control piece is fixed on one of the second part of the supporting piece and the third part of the swinging piece on the same side, and the other of the second part of the supporting piece and the third part of the swinging piece is matched with the guide rail and can move along the guide rail.

The revolving mechanism enables the first parts of the left and right linkage parts to keep 180 degrees opposite on the circular track.

The first part of each linkage piece is higher than the second part and the third part; the arc track is positioned below the lowest point of the circular track, and an acute included angle between a connecting line of a first end point and a second end point of the arc track and a horizontal plane is larger than 45 degrees; the closed track is positioned below the lowest point of the circular track, and the height difference of the projection of the highest position and the lowest position on the closed track in the vertical axial direction is larger than the front-back difference of the projection of the foremost position and the rearmost position on the closed track in the front-back axial direction.

By adopting the technical scheme, the sports equipment provided by the invention can be designed according to requirements to provide leg sports with longer foot stroke and higher leg lifting height, and meanwhile, the angle change amplitude of the foot is controlled within a proper range, so that the leg sports equipment is easy to optimally adjust aiming at the foot angle change behavior during sports in design, and the provided leg sports equipment is relatively comprehensive and has more sports.

Drawings

FIG. 1 is a left side view of an exercise apparatus disclosed in U.S. Pat. No. 9,199,115;

FIGS. 2 to 5 are left side views of the sporting goods according to the first preferred embodiment of the present invention, which show the state in which the pedals are located at four different positions in the movement locus thereof, respectively;

FIG. 6 is a schematic view showing the relationship between the components of a single side of the sporting goods according to the first preferred embodiment of the present invention;

FIGS. 7 to 9 are views similar to FIG. 6, respectively, showing the relationship between the components of the modified embodiment of the sporting goods according to the first preferred embodiment of the present invention;

FIGS. 10 to 13 are left side views of sporting goods according to a second preferred embodiment of the present invention, which show pedals in four different positions on their movement traces, respectively;

FIG. 14 is a modified embodiment of the sporting goods according to the second preferred embodiment of the present invention;

fig. 15 is a left side view of the sporting goods according to the third preferred embodiment of the present invention.

Detailed Description

The structure and function of the present invention will be described in detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 2 to 5, the sporting equipment 10A according to the first preferred embodiment of the present invention has a frame 20, the frame 20 is mainly composed of a base unit 22 stably supported on the ground G and a skeleton unit 24 fixedly disposed above the base unit 22, the skeleton unit 24 has a first rod 241, a second rod 242, a third rod 243, a fourth rod 244 and a fifth rod 255, wherein the first rod 241 extends from the front end of the base unit 22 to the rear upper side, the second rod 242 horizontally extends from the top end of the first rod 241 to the front, the third rod 243 extends from the front end of the second rod 242 to the rear upper side, the fourth rod 244 extends from the middle of the base unit 22 to the middle of the first rod 241 to the front, and the fifth rod 245 extends from the middle of the first rod 241 to the front upper side to the front end of the second rod 242. In addition, a grip set 26 is disposed at the proximal end of the third rod for the user to grasp during the exercise, and a console (console)46 is disposed at the distal end of the third rod for mainly serving as a human-machine interface.

The frame unit 24 is provided with a revolving mechanism 30, which is substantially a crank mechanism in this embodiment, and mainly includes a crank shaft 31 and left and

right crank arms

32L, 32R (see fig. 2), the crank shaft 31 is pivoted to an approximately central position on the second rod 242 of the frame unit 24 according to left and right axial directions, the left and

right crank arms

32L, 32R are respectively and perpendicularly fixed to left and right ends of the crank shaft 31, and extend outward from an end of the crank shaft 31 in a radial direction, and the left and

right crank arms

32L, 32R extend in opposite directions, in other words, in a side view, outer ends of the left and

right crank arms

32L, 32R are opposite to each other with an axis of the crank shaft 31 as a center at 180 degrees. A portion of the frame 20 for receiving the revolving mechanism 30, such as a position of the crank shaft 31, is defined as a first portion of the frame 20.

A flywheel 42 is provided below the revolving mechanism 30, the axis of the flywheel 42 is pivoted on the frame unit 24 according to the left-right axial direction, and the flywheel 42 is connected with the crank shaft 31 through a belt transmission mechanism 44, when the revolving mechanism 30 is driven by external force to rotate, the flywheel 42 can rotate in situ at a faster rotating speed, so as to provide a proper rotating load and rotating inertia, and the rotating motion of the revolving mechanism 30 is stable and smooth. Preferably, the exercise apparatus 10A further comprises a resistance device (not shown) coupled to the flywheel 42 or to the revolving mechanism 30, such as an eddy current brake, a friction brake, a water resistance device, a wind resistance device, etc., for generating a user adjustable resistance to set the force required to drive the revolving mechanism 30 to rotate (via the console 46), i.e., to set the ease of the exercise. The structure and application of the resistance device are common knowledge in the field of sports equipment (for example, the wind resistance and reluctance type resistance device is disclosed in the aforementioned U.S. Pat. No. 9,199,115), and the description is omitted here because the resistance device is not directly related to the creation of the present invention, and is not necessarily included in the sports equipment of the present invention.

The exercise device 10A has two left and

right swing members

50L, 50R symmetrically disposed, and in the preferred embodiment, each

swing member

50L, 50R is a rod having a front end and a rear end, the front end forms a first portion 51 of the

swing member

50L, 50R, a predetermined portion between the front end and the rear end forms a second portion 52 of the

swing member

50L, 50R, and the rear end forms a third portion 53 of the

swing member

50L, 50R. The first portion 51 of each of the swinging

members

50L, 50R is pivotally connected to the front end of the base unit 22 of the frame 20 according to an axis corresponding to the left-right axial direction, so that the swinging

members

50L, 50R can deflect relative to the frame 20 with the first portion 51 as the axis. The portions of the frame 20 for receiving the left and right swinging

members

50L and 50R are defined as the second portion and the third portion of the frame 20, respectively.

The exercise device 10A has two left and

right linkage members

60L, 60R disposed symmetrically, in the preferred embodiment, each

linkage member

60L, 60R is a rod having a top end and a bottom end, the top end forms a first portion 61 of the

linkage member

60L, 60R, the bottom end 62 forms a second portion of the

linkage member

60L, 60R, and a predetermined portion between the top end and the bottom end forms a third portion 63 of the

linkage member

60L, 60R. The first portion 61 of each

linkage

60L, 60R is pivotally connected to the outer end of the corresponding

side crank arm

32L, 32R (see fig. 2) according to an axis corresponding to the left-right axial direction, and the second portion 62 of each

linkage

60L, 60R is pivotally connected to the second portion 52 of the corresponding

side swing element

50L, 50R according to an axis corresponding to the left-right axial direction.

Referring to fig. 6 (a relationship diagram of a single-side component of the sporting equipment 10A), on either side of the sporting equipment 10A, a first link is formed from the position of the crank shaft 31 to the position of the first portion 51 of the swinging member 50, a second link is formed from the crank arm (32 in fig. 6), a third link is formed from the first portion 51 to the second portion 52 of the swinging member (50 in fig. 6), a fourth link is formed from the first portion 61 to the second portion 62 of the linkage member (60 in fig. 6), which together form a planar four-link mechanism, wherein the position of the crank shaft 31 to the position of the first portion 51 of the swinging member 50 (both belonging to the frame body 20) becomes a fixed link (fixed link) in the planar four-link mechanism, and the length relationship of the four links satisfies a specific "grashoff condition" (grashoff condition), the planar four-bar linkage mechanism forms a crank and rocker (crank and rocker) mechanism, and more particularly, as shown in fig. 2 to 5, the first portion 61 of the linking

member

60L, 60R can completely encircle 360 degrees along with the outer end of the

crank arm

32L, 32R, and when the first portion 61 of the linking

member

60L, 60R circularly moves along a circular track CP guided by the

crank arm

32L, 32R, the second portion 62 of the linking

member

60L, 60R reciprocates between a first end point and a second end point along a first arc-shaped track AP1 guided by the oscillating

member

50L, 50R. The first end point (i.e., the top end of the first arc-shaped locus AP1 in the figure) is higher than the second end point (i.e., the bottom end of the first arc-shaped locus AP1 in the figure), and an acute angle between a connecting line (not shown) of the first end point and the second end point and a horizontal plane (e.g., the ground plane (G)) is greater than 45 degrees. The first arcuate path AP1 is located entirely below the lowest point of the circular path CP and is located rearward of the center of the circular path CP (i.e., the axial center of the crank shaft 31).

Based on the first portion 61 and the second portion 62 of the

linkages

60L and 60R being guided on the circular track CP and the first arc-shaped track AP1 respectively to move on the frame 20, the third portion 63 of the

linkages

60L and 60R is regulated to move on a first closed track CP1 relative to the frame 20, in other words, while the third portion 63 of the

linkages

60L and 60R makes one round along the first closed track CP1, the first portion 61 of the

linkages

60L and 60R makes one round along the circular track CP, and the second portion 62 makes one round and one round along the first arc-shaped track AP 1. The first closed locus CP1 is a long and narrow ellipse, an acute included angle between a major axis direction of the first closed locus CP1 and a horizontal plane is greater than 45 degrees, and a height difference between a highest position and a lowest position on the first closed locus CP1 projected in the vertical axial direction is greater than a front-back difference between a foremost position and a rearmost position on the first closed locus CP1 projected in the vertical axial direction.

Since the first portions 61 of the left and right two

linkages

60L, 60R are kept 180 degrees opposite to each other on the circular track CP in side view, the second portions 62 of the left and right two

linkages

60L, 60R are also kept substantially at opposite positions on the first arc-shaped track AP1, and correspondingly, the third portions 63 of the left and right two

linkages

60L, 60R are also kept substantially at opposite positions on the first closed track CP1, for example, when the third portion 63 of one of the linkages is located at the top/bottom end of the first closed track CP1, the third portion 63 of the other linkage is located substantially at the opposite bottom/top end, and assuming that the first portions 61 of the

linkages

60L, 60R revolve on the circular track CP in the counterclockwise direction in the figure, then, substantially, when the third portion 63 of one of the linkages moves forward and upward along the rear half edge of the first closed track CP1, the third portion 63 of the other linkage moves along the front half of the first closed track CP1 to the rear and downward direction.

In the process of the first portions 61 of the linking

members

60L and 60R circularly moving along the circular trajectory CP, the swinging

members

50L and 50R correspondingly swing back and forth, so that the third portions 53 of the swinging

members

50L and 50R reciprocate along a second arc-shaped trajectory AP2 (with the same radian as the first arc-shaped trajectory AP 2), and the relative angles between the swinging

members

50L and 50R on the same side and the linking

members

60L and 60R correspondingly change periodically.

The exercise device 10A has left and

right support members

70L, 70R symmetrically disposed for supporting the left and right feet of the user, respectively, and directly receiving the force applied by the feet of the user, each

support member

70L, 70R includes a base 73 and a pedal 74 fixedly disposed on the top side of the base 73, the front end of the base 73 forms a first portion 71 of the

support member

70L, 70R, and the approximate center of the base 73 forms a second portion 72 of the

support member

70L, 70R. The first portion 71 of each of the supporting

members

70L, 70R is pivotally connected to the third portion 63 of the linking

member

60L, 60R at the corresponding side according to an axis corresponding to the left-right axial direction, so that the supporting

members

70L, 70R can deflect relative to the linking

member

60L, 60R with the first portion 71 as the axis.

The exercise device 10A has two left and

right control members

80L, 80R disposed symmetrically, each

control member

80L, 80R is disposed between the second portion 72 of the supporting

members

70L, 70R and the third portion 53 of the swinging

members

50L, 50R on the same side, and guides the second portion 72 of the supporting

members

70L, 70R and the third portion 53 of the swinging

members

50L, 50R to move relatively along a predetermined path, so that the angle of the supporting

members

70L, 70R on each side with respect to the linking

members

60L, 60R changes with the angle of the swinging

members

50L, 50R with respect to the linking

members

60L, 60R. In the preferred embodiment, each of the

control members

80L and 80R is a rod having a top end and a bottom end, the top end forming the first portion 81 of the

control member

80L or 80R, and the bottom end forming the second portion 82 of the

control member

80L or 80R. The first portion 81 of each

control member

80L, 80R is pivotally connected to the second portion 72 of the supporting member 70 at the corresponding side according to an axis corresponding to the left-right axial direction, and the second portion 82 of each

control member

80L, 80R is pivotally connected to the third portion 53 of the swinging member 50 at the corresponding side according to an axis corresponding to the left-right axial direction.

As shown in fig. 6, on either side of the sports apparatus 10A, the second portion 62 to the third portion 63 of the linkage 60 form another first link, the second portion 52 to the third portion 53 of the swinging member 50 form another second link, the first portion 71 to the second portion 72 of the supporting member (70 in fig. 6) form another third link, and the first portion 81 to the second portion 82 of the controlling member (80 in fig. 6) form another fourth link, together forming another (second) planar four-bar mechanism, wherein the first link (linkage 60), the second link (swinging member 50), the third link (supporting member 70) and the fourth link (controlling member 80) can be regarded as the frame (frame), the input link (input link), the output link (output link) and the coupling link (coupler), respectively, that is, the angle of the linkage 70 relative to the linkage 60 can be changed with the angle of the swinging member 50 relative to the linkage 60, in this way, during the circular motion of the first portion 61 of the linking member 60 along the circular track CP, since the angle of the swinging member 50 relative to the linking member 60 changes periodically, the angle of the supporting member 70 relative to the linking member 60 also changes periodically. Based on the connection of the control member 80, the second portion 72 of the supporting member 72 moves along an arc-shaped path (not shown) with respect to the swinging member 50 around the third portion 53 of the swinging member 50, or the third portion 53 of the swinging member 50 moves along an arc-shaped path (not shown) with respect to the supporting member 70 around the second portion 72 of the supporting member 70.

While the first portion 71 of the supporting member 70 makes one turn along the first closed locus CP1, the second portion 72 of the supporting member 70 makes one turn along the second closed locus CP2 shaped like the first closed locus CP1, it is conceivable that any portion of the supporting member 70 moves along a similar closed locus, except that the moving rates of the front end and the rear end of the supporting member 70 are not completely consistent, so that the relative angles of the front end and the rear end of the supporting member 71 change cyclically in the aforesaid turning motion. In the preferred embodiment, in a movement period in which the first portion 61 of the

linkage

60L, 60R circles around the circular track CP, a maximum angle variation of the

support

70L, 70R with respect to the rack 20 (or with respect to the ground G) is smaller than a maximum angle variation of the

linkage

60L, 60R with respect to the rack 20 (or with respect to the ground G).

The spatial relationship of the pivoting portions (e.g., the pivoting portion 50 and the linking portion 60, the pivoting portion 70 and the control portion 80) and the length ratio of the distance between the pivoting portions are only a simple example, and can be adjusted or adjusted according to the design requirement. For example, in the sports apparatus 10B illustrated in fig. 7, the third portion 53 of the swinging member 50 pivotally connected to the control member 80 is located in front of but not behind the second portion 52 of the swinging member 50 pivotally connected to the linking member 60, and meanwhile, the second portion 72 of the supporting member 70 pivotally connected to the control member 80 is located in front of but not behind the first portion 71 of the supporting member 70 pivotally connected to the linking member 60, in short, the control member 80 is located in front of but not behind the linking member 60, but acts in the same way as before; in the sports apparatus 10C illustrated in fig. 8, the second portion 62 of the linking member 60 pivotally connected to the swinging member 50 is located between the top end and the bottom end of the linking member 60 (which also moves along an arc-shaped track), and the third portion 63 of the linking member 60 pivotally connected to the supporting member 70 is located at the bottom end of the linking member 60 (which also moves along a closed track), so that the supporting member 70 is located at a lower position closer to the ground; in the sporting goods 10D illustrated in fig. 9, the control member 80 is located in front of the linkage 60 and the support member 70 is located below the swing member 50. Incidentally, in the above figures, the first, second and

third portions

51, 52 and 53 of the swinging member 50 are collinear at three points, and the first, second and

third portions

61, 62 and 63 of the linking member 60 are collinear at three points, but this is mainly for convenience of illustration (especially fig. 6 to 9), and is not a necessary or preferred condition of the present invention.

In each of fig. 6 to 9, in the planar four-bar linkage mechanism formed by the linking member 60, the swinging member 50, the supporting member 70 and the control member 80, the lengths of the first, second, third and fourth bars projected on the motion plane (i.e. the plane of the drawing) are defined as the first, second, third and fourth bar lengths, respectively, wherein the third bar length (i.e. the distance between the first portion 71 and the second portion 72 of the supporting member 70 on the drawing) is greater than the second bar length (i.e. the distance between the second portion 52 and the third portion 53 of the swinging member 50 on the drawing), so as to reduce the maximum angle variation of the supporting member 70. In another embodiment of the present invention (not shown), the sum of the lengths of the longest and the shortest of the lengths of the first, second, third and fourth connecting rods is greater than the sum of the lengths of the other two, so as to prevent the support member 70 and the control member 80 from being undesirably deflected or locked.

Referring to fig. 10 to 13, the basic structure of the exercise equipment 10E according to the second preferred embodiment of the present invention is similar to that of the exercise equipment 10A according to the previous embodiment, and mainly includes a frame 20', a revolving mechanism 30', left and right swinging members 50', left and right linking members 60', left and right supporting members 70', and left and right control members 80'. It should be noted that, in the description or the drawings, the same or corresponding components, parts, or movement tracks, etc. of the sporting goods 10E of the present embodiment and the sporting goods 10A of the previous embodiment are basically marked with the same symbols, but a prime (prime) is added to the upper right corner of each symbol in the present embodiment; the symbols appearing in fig. 10 to 13 are not referred to one by one in the following description, and the elements, portions or motion trajectories not specifically described represent the same elements, portions or motion trajectories substantially corresponding to the symbols in the previous embodiment. The main difference between this embodiment and the previous embodiment is that each control member 80L ', 80R' is substantially a wedge-shaped block, fixed to the second portion 72 'of the support member 70L', 70R '(in this case, the rear end of the support member 70L', 70R '), and having a sliding surface 83' facing the swinging member 50L ', 50R'; correspondingly, a roller 85' is pivoted to the third portion 53' of each oscillating member 50L ', 50R ', and the roller 85' abuts against the sliding surface 83' of the corresponding control member 80L ', 80R ' and can slide on the sliding surface 83 '. As shown in fig. 10 to 13, when the first portion 60' of the linking member 60L ', 60R ' circularly rotates along the circular track CR ' so that the relative angle between the swinging member 50L ', 50R ' and the linking member 60L ', 60R ' is periodically changed, the third portion 53' of each swinging member 50L ', 50R ' reciprocates along a predetermined path (not shown) defined by the sliding surface 83' with respect to the second portion 72' of the corresponding supporting member 70L ', 70R ', so that the angle between the supporting member 70L ', 70R ' and the linking member 60L ', 60R ' is changed along with the angle between the swinging member 50L ', 50R ' and the linking member 60L ', 60R '.

The sporting goods 10F shown in FIG. 14 is a modified structure of the sporting goods 10E shown in FIG. 10 (note: the same principle of symbol notation as before), and the difference therebetween is that the control member (designated as 80L ') having the sliding surface 83' is changed to be fixed to the third portion 53 'of the swinging member (designated as 50L'), and correspondingly, the second portion 72 'of the supporting member (designated as 70L') is pivotally provided with a roller 85 'slidable on the sliding surface 83'.

Referring to fig. 15, there is shown an exercise apparatus 10G according to a third preferred embodiment of the present invention (note that the notations are the same as the above, but a double prime is added to the upper right corner of each notation in this embodiment), wherein each control member (represented by 80L ") has a guide rail 84", the control member 80L "is fixed to one of the second portion 72" of the supporting member 70L "and the third portion 53" of the swinging member 50L "on the same side, and the other of the second portion 72" of the supporting member 70L "and the third portion 53" of the swinging member 50L "is coupled to the guide rail 84" and is movable along the guide rail 84 ".

When the sports equipment is used, a user treads the feet on the left and right supporting pieces (pedals) respectively, catches the hands on the grip group, and alternately treads the left and right supporting pieces by utilizing the mutual cooperation of the feet, so that the first/second parts of the left and right supporting pieces are relatively kept to circularly move along the first/second closed tracks, and leg movement of alternately lifting the feet upwards and stepping the feet downwards is performed.

Compared with the prior art which can do the similar leg exercise, the exercise equipment provided by the invention has a plurality of advantages that firstly, the control part guides the second part of the supporting part (pedal) and the third part of the swinging part to move relatively along a preset path, so that the angle of the supporting part (pedal) at each side relative to the linkage part changes along with the angle of the swinging part relative to the linkage part, namely, the angle change behavior and the angle change amplitude of the supporting part (pedal) in the exercise cycle do not necessarily have a relation with the angle change behavior and the lifting displacement amplitude of the linkage part in the exercise cycle, therefore, the exercise equipment can take longer pedal exercise stroke and smaller (or in a proper range) pedal angle change amplitude into consideration, and the angle change behavior of the pedal is easier to be optimally adjusted, in other words, the sports equipment can be designed according to requirements to provide the leg sports with longer foot stroke and higher leg lifting height, and meanwhile, the angle change amplitude of the foot is controlled within a proper range.

Furthermore, when the exercise apparatus of the present invention is used to perform leg exercises, the supporting member (pedal) may be moved cyclically in a manner of ascending along the rear half and descending along the front half of the first and second closed tracks, or in a manner of ascending along the front half and descending along the rear half, in short, the user's foot is raised upward and lowered downward along different paths having front-rear differences, and the leg exercises may include forward and backward striding and retracting movements of the lower leg due to the appropriate shapes of the first and second closed tracks, and thus the exercise apparatus may be used for a wide range of exercises and a large amount of exercise.

Claims

1. An exercise apparatus for exercising legs, comprising:

a frame body, which is provided with a first part, a second part and a third part;

the left and right linkage pieces are respectively provided with a first part, a second part and a third part;

the revolving mechanism is arranged at the first part of the frame body, is connected with the first parts of the left and right linkage pieces, and guides the first parts of the linkage pieces to move along a circular track relative to the frame body; the central axis of the circular track corresponds to the left-right axial direction;

the left and right swinging pieces are respectively provided with a first part, a second part and a third part, and the first parts of the left and right swinging pieces are respectively pivoted on the second part and the third part of the frame body, so that each swinging piece can deflect relative to the frame body by taking the first part as an axis; the second part of each swinging piece is pivoted with the second part of the linkage piece on the same side to guide the second part of each linkage piece to move along an arc-shaped track relative to the frame body, so that when the first part of the linkage piece circularly moves along the circular track, the second part of the linkage piece can reciprocate between the first end point and the second end point of the arc-shaped track, and the third part of the linkage piece can circularly move along a closed track relative to the frame body;

the left and right supporting pieces are respectively used for supporting the left foot and the right foot of a user; each supporting piece is provided with a first part and a second part, and the first part of each supporting piece is pivoted on the third part of the linkage piece on the same side edge, so that the supporting pieces can deflect relative to the linkage piece by taking the first parts of the supporting pieces as axes;

and each control piece is arranged between the second part of the supporting piece and the third part of the swinging piece on the same side, and guides the second part of the supporting piece and the third part of the swinging piece to move relatively along a preset path, so that the angle of the supporting piece on each side relative to the linkage piece is changed along with the angle of the swinging piece relative to the linkage piece.

2. The sporting apparatus for exercising leg portions according to claim 1, wherein: in a circle of movement period of the first part of the linkage piece along the circular track, the maximum angle variation of the support piece relative to the rack body is smaller than the maximum angle variation of the linkage piece relative to the rack body.

3. The sporting apparatus for exercising leg portions according to claim 1, wherein: the supporting piece on each side is parallel to the deflection axis of the swinging piece on the same side relative to the linkage piece relative to the deflection axis of the linkage piece.

4. The sporting apparatus for exercising leg portions according to claim 1, wherein: each control piece is provided with a first part and a second part which are respectively pivoted on the second part of the supporting piece and the third part of the swinging piece on the same side edge; the second part to the third part of the linkage part on each side edge form a first connecting rod, the second part to the third part of the swinging part form a second connecting rod, the first part to the second part of the supporting part form a third connecting rod, and the first part to the second part of the control part form a fourth connecting rod to jointly form a four-bar linkage mechanism.

5. Sports apparatus for performing leg exercises as claimed in claim 4, wherein: the motion planes of the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod of the four-bar mechanism on each side are parallel to each other when the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod of the four-bar mechanism on each side move relatively; the lengths of the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod projected on the motion plane are respectively defined as the length of the first connecting rod, the length of the second connecting rod, the length of the third connecting rod and the length of the fourth connecting rod, and the sum of the lengths of the longest connecting rod and the shortest connecting rod in the length of the first connecting rod, the length of the second connecting rod, the length of the third connecting rod and the length of the fourth connecting rod is greater than the sum of the lengths of the other two connecting rods.

6. The sporting apparatus for exercising leg portions according to claim 1, wherein: each control piece is provided with a sliding surface, the control piece is fixed on one of the second part of the supporting piece and the third part of the swinging piece on the same side, the other of the second part of the supporting piece and the third part of the swinging piece is pivoted with a roller, and the roller is abutted to the sliding surface and can slide on the sliding surface.

7. The sporting apparatus for exercising leg portions according to claim 1, wherein: each control piece is provided with a guide rail, the control piece is fixed on one of the second part of the supporting piece and the third part of the swinging piece on the same side, and the other of the second part of the supporting piece and the third part of the swinging piece is matched with the guide rail and can move along the guide rail.

8. The sporting apparatus for exercising leg portions according to claim 1, wherein: the revolving mechanism enables the first parts of the left and right linkage parts to keep 180 degrees opposite on the circular track.

9. The sporting apparatus for exercising leg portions according to claim 1, wherein: the first part of each linkage piece is higher than the second part and the third part; the arc track is positioned below the lowest point of the circular track, and an acute included angle between a connecting line of a first end point and a second end point of the arc track and a horizontal plane is larger than 45 degrees; the closed track is positioned below the lowest point of the circular track, and the height difference of the projection of the highest position and the lowest position on the closed track in the vertical axial direction is larger than the front-back difference of the projection of the foremost position and the rearmost position on the closed track in the front-back axial direction.