TWM670920U - Exercise bike with curved crank - Google Patents

Abstract

The invention relates to a fitness bike with a curved crank, which at least comprises a base structure, a bracket structure, a load structure, a hand crank structure and a pedal structure, wherein the bracket structure has a support frame arranged on the base structure, and the pedal structure has a crankshaft pivoted on the support frame. The feature of the invention is that a left-hand curved crank and a right-hand curved crank extending in opposite directions with the same axis are respectively arranged at both ends of the crankshaft, and the left and right curved cranks respectively have a straight rod section connected to the crankshaft, and the left The straight rod section of the left and right curved cranks are respectively connected to a curved rod section deflected to the same side, so that there is a deflection angle between the straight rod section and the curved rod section. In addition, the left and right curved cranks are respectively provided with a left foot pedal and a right foot pedal at the end of the curved rod section, so as to ensure that the left and right curved cranks can transmit the force along the oblique direction of the curved rod section to generate a vertical force component and a horizontal force component when the left and right curved cranks rotate, whether at a vertical point or a horizontal point, to form a fitness bike with curved cranks that can avoid dead angles in movement.

Description

Exercise bike with curved crank

This invention belongs to the technical field of fitness equipment, specifically, a fitness bike with a curved crank, which can avoid the frustration caused by the dead angle in the vertical position or the feeling of falling due to the lack of vertical force in the horizontal position when performing circular pedaling. It can effectively improve the smoothness of the pedaling action and make the exercise of the fitness bike smoother and safer.

In recent years, people have been living a busy life and have been unable to spare time for outdoor exercise. Therefore, most people can only use their spare time to do some simple body stretching exercises, or do some indoor exercises with the help of related fitness equipment to stretch their muscles and bones, such as elliptical track trainers, treadmills, exercise bikes, etc., each with different functions and exercise effects. Taking a common exercise bike as an example, as shown in the first and second figures, its body is mainly composed of a base (10) provided with a support frame (11) for carrying a user, and the support frame (11) is provided with a load structure (15). The load structure (15) has a crankshaft (16) laterally pivoted on the support frame (11), and the crankshaft (16) has two ends extending in opposite directions from both sides of the support frame (11), and the ends of the crankshaft (17) on both sides are respectively provided with pedals (18) for the user to step on the pedals (18) alternately with both feet to drive a load wheel (19) through the crankshaft (16), thereby achieving the purpose of providing exercise load for the lower body to perform circular pedaling exercises, especially mainly for training the quadriceps, popliteal muscles and calves. Some other exercise bikes are further provided with an armrest connecting rod (14) at the end of the cranks (17) for connecting with a rocker armrest [not shown] provided at the front end of the bike body, so that the user can hold the rocker armrests with both hands and move them synchronously and alternately when pedaling, which can be used to strengthen the arms, shoulders, core and back training, thus turning it into a whole-body exercise.

However, the cranks (17) used for driving the existing fitness bike are of a straight rod structure, which has some problems in practical application: first, when the cranks (17) rotate to a vertical position perpendicular to the ground, the cranks (17) will generate a downward vertical component force P1, and since there is no horizontal component force at this time, a "dead angle state" will be formed, thus generating a sense of stepping. Secondly, when the cranks (17) rotate to a horizontal position parallel to the ground, the cranks (17) will generate a horizontal component force P2 parallel to the ground, and since there is no vertical component force at this time, a "falling state" will be formed, causing the user to feel a sense of stepping on empty space.

In other words, when the existing exercise bike is in motion, it will be affected by the vertical force P1 at the vertical point of the motion and the horizontal force P2 at the horizontal point of the motion when the cranks (17) are rotating, which makes it easy to produce a "dead angle state" or "falling state" phenomenon in its circular motion, resulting in unsmooth and unstable motion. It is difficult to be called an ideal designer. Therefore, how to solve this problem is a very important issue in the industry.

Due to the above shortcomings and needs, the creator has used his many years of experience in related technologies and product design and manufacturing to study the above shortcomings and needs, and actively seek solutions. After continuous hard research and trial production, he finally successfully developed an exercise bike with curved cranks to overcome the inconvenience and trouble caused by the straight cranks of existing exercise bikes.

Therefore, the main purpose of this invention is to provide an exercise bike with a curved crank, so that when it performs circular motion, it can have both horizontal and vertical force components in the vertical position or the horizontal position, which can effectively avoid the feeling of frustration caused by the lack of horizontal force component in the vertical position, or the feeling of falling caused by the lack of vertical force component in the horizontal position.

In addition, the second main purpose of the invention is to provide an exercise bike with a curved crank, which can improve the smoothness of the circular pedaling motion of the exercise bike and make the exercise more stable, thereby greatly improving the safety of the exercise.

To this end, this invention mainly realizes the above-mentioned purpose and performance through the following technical means, which at least includes a base structure, a bracket structure, a load structure, a hand crank structure and a pedal structure, and the bracket structure has a support frame arranged on the base structure, and the load structure is arranged on the bracket structure to connect the pedal structure to provide a motion load, wherein the pedal structure is arranged between the two sides of the bracket structure, and the pedal structure has a crankshaft penetrating the support frame, so that when the crankshaft is actuated, it can synchronously drive the load structure to generate a motion load; its characteristics are:

The two ends of the crankshaft are respectively provided with a left curved crank and a right curved crank extending in the same axis and in opposite directions, and the left and right curved cranks respectively have a straight rod section connected to the crankshaft, and the straight rod sections of the left and right curved cranks are respectively connected to a curved rod section deflected to the same side, so that there is a deflection angle between the straight rod section and the curved rod section, and the left and right curved cranks are respectively locked to the two ends of the crankshaft with the ends of the straight rod section, and the left and right curved cranks are respectively provided with a left foot pedal and a right foot pedal with the ends of the curved rod section;

This ensures that when the left and right curved cranks rotate, no matter at a vertical point or a horizontal point, the left and right curved cranks can transmit the force along the oblique direction of the curved rod section to generate a vertical force component and a horizontal force component, thereby forming a fitness bike with curved cranks that can avoid dead angles in movement.

Through the specific implementation of the aforementioned technical means, the exercise bike with curved cranks of the present invention can utilize the design of the left and right curved cranks of the pedaling structure having the straight rod section and the opposite curved rod section, so that the left and right curved cranks have the deflection angle, thereby ensuring that the left and right curved cranks can generate a vertical force component and a horizontal force component along the oblique force transmitted by the curved rod section when rotating, whether in a vertical position or a horizontal position, thereby avoiding the frustration caused by a dead angle during exercise, or the feeling of falling caused by the absence of a vertical force component, further improving the smoothness of the pedaling action, making the exercise more stable, greatly improving the safety of the exercise, and further improving its added value and economic benefits.

This invention also uses the following technical means to further achieve the aforementioned purposes and effects; they include:

Preferably, the hand crank structure is provided on both sides of the support frame of the bracket structure, and the hand crank structure has a left handrail rocker and a right handrail rocker with a middle section pivotally arranged on both sides of the front end of the support frame, and the bottom ends of the left and right handrail rockers are pivotally connected to the end portions of the curved rod sections of the left and right curved cranks corresponding to the pedal structure by a left connecting rod and a right connecting rod respectively.

Preferably, the base structure has a main frame rod and a horizontal foot rod arranged at both ends of the main frame rod for being stably placed on the ground, and the support frame of the bracket structure is mounted on the main frame rod.

Preferably, the support frame includes a vertical tube erected at the rear end of the main frame rod and two fork tubes erected at both sides of the front end of the main frame rod, and the load-bearing structure is mainly a blade assembly pivoted between the fork tubes, and the blade assembly has a passive wheel on one side of the axis, and a driving wheel corresponding to the passive wheel is provided on the crankshaft, and the passive wheel and the driving wheel are connected by a transmission member, so that when the crankshaft is actuated, the blade assembly can be synchronously driven to generate load.

Preferably, the support frame of the support structure has a tube for selectively inserting a pad assembly.

Preferably, a meter set is provided at the front end of the support frame for the user to monitor relative motion data.

Preferably, the load structure is provided with a damper corresponding to the blade set on the support frame, so as to change the motion effect by adjusting the load force of the blade set.

Preferably, the hand-crank structure has a left pivot and a right pivot extending outwardly in a transverse direction on both sides of the support frame, respectively, for the middle sections of the left and right handrail cranks to be pivoted.

Preferably, the pedal structure is provided with a shell cover on both sides of the support frame, which can cover the transmission member and allow the two ends of the crankshaft to pass through, so as to produce a protective effect.

Preferably, the deflection direction of the curved rod section of the left and right curved cranks relative to the straight rod section can be the same as the movement direction.

Preferably, the deflection direction of the curved rod section of the left and right curved cranks relative to the straight rod section can be opposite to the movement direction.

Preferably, the deflection angle is greater than 90 degrees and less than 180 degrees.

In order to enable the review committee to further understand the composition, characteristics and other purposes of this creation, the following is a preferred embodiment, which is described in detail with the help of diagrams, and at the same time allows those familiar with the technical field to implement it in detail.

The attached drawings illustrate specific embodiments of the invention and its components. All references to front and back, left and right, top and bottom, upper and lower, and horizontal and vertical are only used for convenience of description and do not limit the invention or its components to any position or spatial direction. The dimensions specified in the drawings and the description can be changed according to the design and requirements of the specific embodiments of the invention without departing from the scope of the patent application of the invention, so the patent application is not limited by this structure.

The invention is a fitness bike. Please refer to the third and fourth figures for details. The fitness bike is mainly composed of a base structure (20), a bracket structure (30), a load structure (40) and a pedal structure (60).

The base structure (20) has a main frame rod (21) and cross bars (22) arranged at both ends of the main frame rod (21) for being stably placed on the ground, and the support structure (30) has a support frame (31), the support frame (31) includes a vertical tube (32) erected at the rear end of the main frame rod (21) and two fork tubes (33) erected at both sides of the front end of the main frame rod (21), and the support structure (30) is further provided with a seat tube (34) at the front side of the vertical tube (32) for selectively inserting a seat pad assembly (35), and the front end of the support frame (31) is provided with an upwardly extending instrument assembly (36) for the user to monitor relative motion data;

The load structure (40) is disposed on the support structure (30) to connect the pedal structure (60) to provide a motion load. The load structure (40) mainly comprises a blade assembly (41) pivotally disposed between the two fork tubes (33) at the front end of the support frame (31), and a synchronously rotating passive wheel (42) is provided on one side of the axis of the blade assembly (41) for synchronously driving the blade assembly (41) to rotate. Furthermore, the load structure (40) is provided with a damper (45) corresponding to the blade assembly (41) on the support frame (31) for adjusting the load force of the blade assembly (41) through the damper (45) to adjust the motion intensity of the fitness bike.

Furthermore, the pedal structure (60) is disposed on the support structure (30), and the pedal structure (60) has a crankshaft (61) penetrating the support frame (31), and a driving wheel (62) corresponding to the aforementioned passive wheel (42) is fixedly disposed on the crankshaft (61), so that the passive wheel (42) and the driving wheel (62) are connected by a transmission member (63) (such as a chain), so that when the crankshaft (61) is actuated, the blade assembly (41) can be synchronously driven to generate a load, and the pedal structure (60) is provided with a cover on both sides of the support frame (31). The invention is characterized in that the crankshaft (61) has a left-hand curved crank (66) and a right-hand curved crank (67) at both ends thereof, which are coaxial and extend in opposite directions, respectively, and the left-hand and right-hand curved cranks (66, 67) respectively have a straight rod section (661, 671) connected to the crankshaft (61), and the straight rod sections (661, 671) of the left-hand and right-hand curved cranks (66, 67) are respectively connected to a curved rod section (661, 671) deflected to the same side. 62, 672), wherein the deflection direction of the curved rod section (662, 672) relative to the straight rod section (661, 671) can be the same direction or the opposite direction of the movement direction of the left and right curved cranks (66, 67), so that there is a deflection angle between the extension axis of the straight rod section (661, 671) of the left and right curved cranks (66, 67) and the extension axis of the curved rod section (662, 672), and the deflection angle is greater than 90 degrees and less than 180 degrees, so as to ensure that the left and right curved cranks (66, 67) can rotate in the same direction regardless of whether they are in the vertical direction. The vertical force component and the horizontal force component can be generated at both the straight point and the horizontal point due to the obliquely transmitted force, and the left and right curved cranks (66, 67) are respectively locked to the two ends of the crankshaft (61) by the ends of the straight rod sections (661, 671), and the left and right curved cranks (66, 67) are further provided with a left foot pedal (68) and a right foot pedal (69) by the ends of the curved rod sections (662, 672) respectively, so that the user can step on the left and right foot pedals (68, 69) with both feet to make the left and right curved cranks (66, 67) generate circular rotational motion.

According to some embodiments, the invention further comprises a hand-crank structure (50), wherein the hand-crank structure (50) comprises a left pivot rod (51) and a right pivot rod (52) extending outwardly in a transverse direction on both sides of the front end of the support frame (31) of the support structure (30), and the hand-crank structure (50) comprises a left hand-crank lever (56) pivoted at the middle section on the left pivot rod (51) and a right hand-crank lever (52) pivoted at the middle section on the right pivot rod (52). 7), and the bottom ends of the left and right handrail rockers (56, 57) are respectively pivoted with the ends of a left connecting rod (58) and a right connecting rod (59), and the other ends of the left and right connecting rods (58, 59) are respectively pivoted with the ends of the curved rod sections (662, 672) of the aforementioned opposite left and right curved cranks (66, 67), so that the user can use both hands to hold the left and right handrail rockers (56, 57) and swing them alternately to produce whole body exercise when stepping on the circular motion.

Thereby, a fitness bike with a curved crank is constructed which can avoid blind spots in movement.

When the fitness bike of the present invention is actually used, as shown in the third and fifth figures, in terms of operation, the user can sit on the seat assembly (35) of the support structure (30), and respectively straddle the left and right foot pedals (68, 69) of the left and right bending cranks (66, 67) of the pedal structure (60) with the left and right feet of the lower body, and respectively hold the upper sections of the left and right handrail rockers (56, 57) of the hand crank structure (50) with the left and right hands of the upper body. In this way, when the user steps on the left and right foot pedals (68, 69) to actuate the left and right bending cranks, the user can move the left and right bending cranks. When the cranks (66, 67) are turned, the crankshaft (61) can be driven to generate a rotational motion, and the transmission member (63) can be used to drive the blade assembly (41) to rotate to generate a motion load, so that the user can achieve knee rotation, thereby driving a large amount of leg and hip curve movement, which is used for training the quadriceps, popliteal muscles and calves, and the left and right connecting rods (58, 59) are used to synchronously drive the left and right armrest rockers (56, 57) to make the hands swing alternately, and the arc reciprocating swing operation characteristics can be used to strengthen the training of the arms, shoulders, core and back, thereby achieving the effect of whole body exercise;

As shown in the sixth and seventh figures, the crankshaft (61) is pivotally mounted at the top of the support frame (31), and the left and right curved cranks (66, 67) are respectively arranged on both sides of the crankshaft (61) and extend in opposite directions. When the left and right pedals (68, 69) are stepped on, the crankshaft (61) is driven alternately through the left and right curved cranks (66, 67). When the left and right curved cranks (66, 67) rotate to a vertical position T perpendicular to the ground, the crankshaft (61) is rotated along the curved rod sections (662, 672). The obliquely transmitted force generates a downward vertical force component and a horizontal force component, and does not generate a "dead angle state", thereby avoiding the feeling of a stepping point (as shown in the sixth figure); in addition, when the left and right curved cranks (66, 67) rotate to a horizontal position S parallel to the ground, a horizontal force component and a vertical force component are generated along the obliquely transmitted force of the curved rod section (662, 672), and does not generate a "falling state", thereby avoiding the feeling of falling due to stepping on empty space (as shown in the seventh figure).

As can be seen from the above-mentioned structure and usage description, the fitness bike of the present invention utilizes the design of the left and right curved cranks (66, 67) of the pedal structure (60) having the straight rod section (661, 671) and the opposite curved rod section (662, 672), so that the left and right curved cranks (66, 67) have a deflection angle to ensure that the left and right curved cranks (66, 67) are in a stable state. ) during rotational movement, whether in the vertical position T or the horizontal position S, the vertical force component and the horizontal force component can be generated along the obliquely transmitted force of the bent rod section (662, 672), thereby avoiding the frustration caused by the blind spot during movement or the feeling of falling due to the lack of the vertical force component, further improving the smoothness of the pedaling movement, making the movement more stable, and greatly improving the safety of the movement.

In summary, it can be understood that this creation is a new creation with excellent creativity. In addition to effectively solving the problems faced by practitioners, it also greatly improves the efficacy. In the same technical field, there are no identical or similar products created or publicly used. At the same time, it has improved efficacy. Therefore, this creation has met the requirements of "novelty" and "progressiveness" for new patents, and an application for a new patent is filed in accordance with the law.

10: Base 11: Support frame 14: Handrail connecting rod 15: Load structure 16: Crankshaft 17: Crank 18: Pedal 19: Load wheel 20: Base structure 21: Main frame rod 22: Crossbar 30: Bracket structure 31: Support frame 32: Seat tube 33: Fork tube 34: Seat tube 35: Seat pad assembly 36: Instrument assembly 40: Load structure 41: Blade assembly 42: Passive wheel 45: Damper 50: Hand crank structure 51: Left pivot 52: Right pivot 56: Left armrest rocker 57: Right armrest rocker 58: Left connecting rod 59: Right connecting rod 60: Pedal structure 61: Crankshaft 62: Drive wheel 63: Drive element 64: Shell 66: Left curved crank 661: Straight rod section 662: Curved rod section 67: Right curved crank 671: Straight rod section 672: Curved rod section 68: Left foot pedal 69: Right foot pedal

The first figure is a diagram showing the movement of a conventional exercise bike with the crank in a vertical position during exercise.

The second figure shows the movement of the crank of the exercise bike in a horizontal position during exercise.

The third figure is a three-dimensional diagram of the fitness bike of this creation.

Figure 4 is a three-dimensional exploded schematic diagram of the exercise bike of this invention, used to illustrate its components and their relative relationships.

Figure 5: is a schematic diagram of the pedal operation of the fitness bike of this invention, used to illustrate the state of its movement trajectory.

Figure 6: is a diagram showing the movement of the exercise bike of this invention in a vertical position.

Figure 7: is a schematic diagram of the movement state of the exercise bike of this invention when it is in a horizontal position.

20: Base structure

21: Main frame

22: horizontal foot bar

30: Bracket structure

31: Support frame

32: Riser

33: Fork tube

34: Seat tube

35: Seat cushion assembly

36: Instrument set

40: Load structure

41: Impeller group

42:Passive wheel

45: Damper

50: Hand crank structure

51: Left hinge

52: Right arm

56: Left armrest joystick

57:Right armrest joystick

58: Left Link

59:Right connecting rod

60: Trampling structure

61: Crankshaft

62: Drive wheel

63: Transmission parts

64: Shell

66: Left-hand crank

661: Straight rod section

662: Bend section

67: Right-hand crank

671: Straight rod section

672: Bend section

68: Left foot pedal

69:Right pedal

Claims (12)

A fitness bike with a curved crank, which at least includes a base structure, a bracket structure, a load structure and a pedal structure, wherein the bracket structure has a support frame arranged on the base structure, and the load structure is arranged on the bracket structure to connect the pedal structure to provide a motion load, wherein the pedal structure is arranged between the two sides of the bracket structure, and the pedal structure has a crankshaft penetrating the support frame, so that when the crankshaft is actuated, it can synchronously drive the load structure to generate a motion load; its characteristics are: The two ends of the crankshaft are respectively provided with a left curved crank and a right curved crank extending in opposite directions with the same axis, and the left and right curved cranks respectively have a straight rod section connected to the crankshaft, and the straight rod sections of the left and right curved cranks are respectively connected to a curved rod section deflected to the same side, so that there is a deflection angle between the straight rod section and the curved rod section, and the left and right curved cranks are respectively locked to the two ends of the crankshaft with the ends of the straight rod section, and the left and right curved cranks are respectively provided with a left foot pedal and a right foot pedal with the ends of the curved rod section; This ensures that when the left and right curved cranks rotate, whether at a vertical point or a horizontal point, they can transmit force along the oblique direction of the curved rod section to generate a vertical force component and a horizontal force component, thereby forming an exercise bike with curved cranks that can avoid dead angles in movement. As described in claim 1, the exercise bike with curved cranks, wherein the deflection direction of the curved rod section of the left and right curved cranks relative to the straight rod section can be the same as the direction of movement. An exercise bike with curved cranks as described in claim 1, wherein the deflection direction of the curved rod section of the left and right curved cranks relative to the straight rod section can be opposite to the direction of movement. An exercise bike with a curved crank as described in claim 1, wherein the deflection angle is greater than 90 degrees and less than 180 degrees. An exercise bike with a curved crank as described in claim 1, wherein the base structure has a main frame rod and cross-legged rods arranged at both ends of the main frame rod, and the support of the bracket structure is mounted on the main frame rod. An exercise bike with curved cranks as described in claim 1, wherein the support frame of the support structure has a seat tube for selectively inserting a seat pad assembly. An exercise bike with a curved crank as described in claim 5, wherein the support frame includes a stand tube erected at the rear end of the main frame rod and two fork tubes erected at both sides of the front end of the main frame rod, and the load-bearing structure is mainly a blade assembly pivoted between the fork tubes, and the blade assembly has a passive wheel on one side of the axis, and a driving wheel corresponding to the passive wheel is provided on the crankshaft, and the passive wheel and the driving wheel are connected by a transmission member, so that when the crankshaft is actuated, the blade assembly can be synchronously driven to generate a load. As described in claim 7, the exercise bike with a curved crank, wherein the pedaling structure is provided with a shell cover on both sides of the support frame that can cover the transmission member and allow the two ends of the crankshaft to pass through. As described in claim 7, the exercise bike with a curved crank, wherein the load structure is provided with a damper corresponding to the blade set on the support frame, so as to change the exercise effect by adjusting the load force of the blade set. An exercise bike with curved cranks as described in claim 1, wherein a meter set is provided at the front end of the support frame. An exercise bike with a curved crank as described in any one of claims 1 to 10, wherein a hand crank structure is provided on both sides of the support frame of the bracket structure, and the hand crank structure has a left handrail rocker and a right handrail rocker with a middle section pivotally arranged on both sides of the front end of the support frame, and the bottom ends of the left and right handrail rockers are pivotally connected to the end portions of the curved rod sections of the left and right curved cranks opposite to the pedal structure by a left connecting rod and a right connecting rod respectively. As described in claim 11, the exercise bike with a curved crank, wherein the hand crank structure has a left pivot and a right pivot extending outwardly and laterally on both sides of the support frame, respectively, for the middle section pivoting of the left and right handrail rockers.

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