Elliptical track movement device with bent crank

Abstract

The utility model relates to an elliptical track exerciser with a bent crank, which at least comprises a base structure, a support structure, a load structure, a swing structure and a treading structure, the support structure is provided with a support frame arranged on the base structure, and the treading structure is provided with a crank shaft rod pivoted on the support frame in a penetrating manner. A left bent crank and a right bent crank which are coaxial and extend in different directions are respectively arranged at two ends of the crankshaft rod, the left bent crank and the right bent crank are respectively provided with a straight rod section connected with the crankshaft rod, the straight rod sections of the left bent crank and the right bent crank are respectively connected with bent rod sections which deflect towards the same side, and deflection included angles are formed between the straight rod sections and the bent rod sections. Therefore, when the left bent type crank and the right bent type crank rotate, the left bent type crank and the right bent type crank can generate oblique component force along the bent rod section regardless of a vertical point or a horizontal point, and the elliptical track movement device with the bent type cranks, which can avoid movement dead angles, is formed.

Description

Technical Field

[0001] This utility model relates to the technical field of fitness equipment, specifically to an elliptical trajectory exercise device with a curved crank, which avoids the feeling of jerking due to dead angles or the feeling of sudden drop due to lack of vertical force during pedaling, thereby improving the smoothness of pedaling action and making the exercise more stable and safe. Background Technology

[0002] In recent years, with the improvement of living standards, people are paying more and more attention to exercise and leisure for their physical and mental health amidst their busy work schedules. However, due to work, environment, and weather, it is difficult for people to effectively and consistently exercise outdoors. Many people use home exercise equipment as a substitute for outdoor exercise. Home exercise equipment is available in a wide variety, each with different functions and exercise effects. Taking the common elliptical track exercise machine as an example, it consists of a support frame fixed on the base, cranks on both sides pivoted at the rear of the support frame, and a load structure fixed at the front of the support frame driven by stepping on the cranks. Handrails are pivoted on both sides of the front of the support frame, and pedal connecting rods are pivoted across the bottom of the cranks and handrails on both sides. This allows users to exercise by alternately stepping on the pedal connecting rods on both sides and swinging the handrails. Since the front and rear ends of the pedal connecting rods on both sides are pivoted between the handrails and cranks, the user's foot movement forms an elliptical trajectory. Because of its large stride and the ability to swing both arms to form a full-body exercise, it has become a popular type of home exercise equipment.

[0003] However, some problems still exist in practical applications, such as Figure 1 , Figure 2 As shown, the support frame (11) is erected on the base (10), and the top of the support frame (11) uses a pivotally mounted crank (12) to drive the sprocket (15) to drive the aforementioned load structure [not shown in the figure]. The end of the crank (12) is pivotally connected to the end of the pedal linkage (16), so that when the pedal linkage (16) is stepped on, the crank (12) can drive the sprocket (15). In actual operation, when the crank (12) rotates to a state perpendicular to the ground, a downward vertical force P1 is generated. At this time, because there is no horizontal force, a "dead angle state" is formed, which in turn produces a jolt feeling when stepping. In addition, when the crank (12) rotates to a state parallel to the ground, a horizontal force P2 parallel to the ground is generated. Since there is no vertical force at this time, a "sudden drop state" is formed, causing the user to feel a sudden drop as if stepping into empty space.

[0004] Because existing elliptical trajectory motion machines are affected by the vertical force P1 at the vertical point of motion and the horizontal force P2 at the horizontal point of motion during the rotation of the crank (12), the phenomenon of "dead angle state" or "sudden drop state" is easily generated during the elliptical motion, resulting in an unsmooth and unstable motion. Therefore, how to solve this problem is a very important issue in the industry.

[0005] Due to the aforementioned shortcomings and needs, the creator has conducted research on these issues and, through continuous research and experimentation, developed an elliptical trajectory motion device with a curved crank, in order to overcome the inconvenience and troubles caused by the lack of smooth crank motion in existing devices. Utility Model Content

[0006] The main purpose of this invention is to provide an elliptical trajectory motion device with a curved crank, so that the crank can have both horizontal and vertical components when moving vertically or horizontally, thus avoiding the feeling of jerking due to dead angles or the feeling of sudden drop due to the lack of vertical component.

[0007] Another major objective of this invention is to provide an elliptical trajectory exercise device with a curved crank, which can improve the smoothness of pedaling action, make the movement more stable, and greatly improve the safety of exercise.

[0008] Therefore, this utility model mainly achieves the above-mentioned purpose and effect through the following technical means, including at least a base structure, a support structure, a load structure, a rocking structure and a stepping structure. The support structure has a support frame on the base structure, and the load structure is set on the support structure to connect the stepping structure to provide motion load. The rocking structure has a left handrail rocker and a right handrail rocker pivotally mounted in the middle on both sides of the front end of the support frame of the support structure. The stepping structure is located between the rear end of the support structure and both sides of the rocking structure. The stepping structure has a crank shaft pivotally mounted through the support frame, so that when the crank shaft is operated, it can synchronously drive the load structure to generate motion load.

[0009] The crankshaft has left-bent cranks and right-bent cranks extending along the same axis but in opposite directions at both ends. The left-bent cranks and right-bent cranks each have a straight rod section connected to the crankshaft. The straight rod sections of the left-bent cranks and right-bent cranks are connected to bent rod sections that deviate to the same side. There is a deviating angle between the straight rod sections and the bent rod sections. The left-bent cranks and right-bent cranks are locked to both ends of the crankshaft at the ends of the straight rod sections. The left-bent cranks and right-bent cranks each have a left connecting rod and a right connecting rod pivotally connected at the ends of the bent rod sections. The other ends of the left connecting rod and right connecting rod are pivotally connected to the ends of the opposite left handrail rocker and right handrail rocker.

[0010] This ensures that, during rotational motion, both the left-bend crank and the right-bend crank generate an oblique component force along the bent section, whether at a vertical or horizontal point, thus forming an elliptical trajectory motion device with a bent crank that avoids dead angles in motion.

[0011] Through the specific implementation of the aforementioned technical means, the elliptical trajectory motion device with curved cranks of this utility model utilizes the design of straight rod sections and opposing curved rod sections in the left and right curved cranks of the pedaling structure. This allows the left and right curved cranks to have an oblique angle, ensuring that the left and right curved cranks generate an oblique component force along the curved rod section during rotational motion, regardless of whether they are in the vertical position T or the horizontal position S. This avoids the feeling of jerking due to dead angles or the feeling of sudden drop due to the lack of vertical component force during motion, further improving the smoothness of pedaling action and making the motion more stable, greatly improving the safety of the motion, significantly increasing its practicality, and further enhancing its added value and economic benefits.

[0012] This utility model further achieves the above-mentioned objectives and effects by utilizing the following technical means; including:

[0013] Preferably, the base structure has a main frame and cross legs at both ends of the main frame for stable placement on the ground, while the support structure is mounted on the main frame.

[0014] Preferably, the support frame includes a vertical tube erected at the rear end of the main frame rod and two fork tubes erected on both sides of the front end of the main frame rod. The load structure mainly pivots the impeller assembly between the fork tubes, and the impeller assembly has a driven wheel on one side of the shaft. The crankshaft is provided with a corresponding drive wheel, so that the driven wheel and the drive wheel can be connected by a transmission component, so that the impeller assembly can be driven to generate load synchronously when the crankshaft is operated.

[0015] Preferably, the support frame of the bracket structure has a seat tube for selective insertion of the seat cushion assembly.

[0016] Preferably, the front end of the support frame is provided with an upwardly extending grip assembly, and the grip assembly is provided with a display instrument for the user to hold and monitor relative motion data.

[0017] Preferably, the load structure has a damper on the support frame corresponding to the impeller assembly, which is used to change the motion effect by adjusting the load force of the impeller assembly.

[0018] Preferably, the rocking structure has a left pivot and a right pivot extending laterally on both sides of the support frame, which are used to pivot the middle sections of the left handrail rocker and the right handrail rocker.

[0019] Preferably, the foot pedal structure has covers on both sides of the support frame that can be closed to the transmission components to provide protection.

[0020] Preferably, the direction of the skew of the bent section relative to the straight section of the left-bend crank and the right-bend crank can be in the same direction as the direction of motion.

[0021] Preferably, the bending section of the left-bending crank and the right-bending crank can be skewed in the opposite direction to the straight section.

[0022] Preferably, the skew angle is greater than 90 degrees and less than 180 degrees.

[0023] Preferably, the left and right connecting rods are equipped with pedals for the user to step on. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the motion state of the crank of a commonly used elliptical trajectory motion machine when it is in a vertical position.

[0025] Figure 2 This is a schematic diagram of the motion state of the crank of a commonly used elliptical trajectory motion machine when it is in a horizontal position.

[0026] Figure 3 This is a three-dimensional appearance diagram of the elliptical trajectory motion device of this utility model.

[0027] Figure 4 This is a three-dimensional exploded view of the elliptical trajectory motion device of this utility model, used to illustrate the constituent elements and their relative relationships.

[0028] Figure 5 This is a schematic diagram of the pedal operation of the elliptical trajectory motion device of this utility model, used to illustrate the state of the motion trajectory.

[0029] Figure 6 This is a schematic diagram of the motion state of the elliptical trajectory motion device of this utility model when it is in a vertical position.

[0030] Figure 7 This is a schematic diagram of the motion state of the elliptical trajectory motion device of this utility model when it is in a horizontal position.

[0031] Figure label:

[0032] 10: Base

[0033] 11: Support frame

[0034] 12: Crank

[0035] 15: Sprocket

[0036] 16: Pedal Linkage

[0037] 20: Base Structure

[0038] 21: Main frame pole

[0039] 22: Crossbar

[0040] 30: Support structure

[0041] 31: Support frame

[0042] 32: Riser

[0043] 33: Fork tube

[0044] 34: Seat tube

[0045] 35: Seat Cushion Set

[0046] 36: Grip Set

[0047] 38: Display Instrument

[0048] 40: Load Structure

[0049] 41: Blade assembly

[0050] 42: Passive Wheel

[0051] 45: Dampers

[0052] 50: Swaying Structure

[0053] 51: Left pivot

[0054] 52:Right pivot lever

[0055] 56: Left armrest crank

[0056] 57: Right armrest lever

[0057] 60: Foot pedal structure

[0058] 61: Crankshaft

[0059] 62: Transmission wheel

[0060] 63: Transmission components

[0061] 64: Shell Cap

[0062] 66: Left-hand bend crank

[0063] 661: Straight rod section

[0064] 662: Bending section

[0065] 67: Right-hand crank

[0066] 671: Straight rod section

[0067] 672: Bending section

[0068] 68: Left Link

[0069] 681: Pedal

[0070] 69: Right Link

[0071] 691: Pedal Detailed Implementation

[0072] The accompanying drawings illustrate specific embodiments of the present invention and its components. All references to front and back, left and right, top and bottom, upper and lower, and horizontal and vertical are for ease of description only and are not intended to limit the invention or restrict its components to any particular position or spatial orientation. The dimensions specified in the drawings and specification may be varied according to the design and requirements of specific embodiments of the invention without departing from the scope of the patent application, and are therefore not limited to this structure in the patent application.

[0073] This utility model is an elliptical trajectory motion device. Please refer to the following: Figure 3 , Figure 4 As shown, it mainly consists of a base structure 20, a support structure 30, a load-bearing structure 40, a rocking structure 50, and a stepping structure 60.

[0074] The base structure 20 has a main frame rod 21 and cross legs 22 at both ends of the main frame rod 21 for stable placement on the ground. The support structure 30 has a support frame 31, which includes a vertical tube 32 erected at the rear end of the main frame rod 21 and two fork tubes 33 erected on both sides of the front end of the main frame rod 21. The support structure 30 further has a seat tube 34 on the front side of the vertical tube 32 for selective insertion of the seat cushion assembly 35. The front end of the support frame 31 has an upwardly extending grip assembly 36, and the grip assembly 36 has a display instrument 38 for the user to hold and monitor relative motion data.

[0075] The load structure 40 is mounted on the support structure 30 and connects to the pedal structure 60 to provide exercise load. The load structure 40 mainly pivots the wheel blade assembly 41 between the two fork tubes 33 at the front end of the support frame 31. The wheel blade assembly 41 has a driven wheel 42 on one side of the shaft to synchronously drive the wheel blade assembly 41. The load structure 40 has a damper 45 on the support frame 31 corresponding to the wheel blade assembly 41, which is used to change the exercise effect by adjusting the load force of the wheel blade assembly 41. The swing structure 50 has a left pivot rod 51 and a right pivot rod 52 extending outward laterally on both sides of the front end of the support frame 31 of the support structure 30. The swing structure 50 has a left handrail rocker arm 56 pivoted in the middle on the left pivot rod 51 and a right handrail rocker arm 57 pivoted in the middle on the right pivot rod 52, which are used by the user to hold with both hands to generate whole-body exercise by swinging alternately.

[0076] The pedal structure 60 is located between the rear end of the support structure 30 and both sides of the rocking structure 50. The pedal structure 60 has a crankshaft 61 that is pivotally connected to the riser 32 of the support frame 31. The crankshaft 61 is provided with a drive wheel 62 corresponding to the driven wheel 42. The driven wheel 42 and the drive wheel 62 are arranged around the transmission component 63 (such as a chain) so that when the crankshaft 61 is operated, it can synchronously drive the wheel assembly 41 to generate a load. The pedal structure 60 has transmission components 62 that can be relatively covered on both sides of the support frame 31. The cover 64 of the 3 provides protection; the crankshaft 61 has a left-bent crank 66 and a right-bent crank 67 extending coaxially but in opposite directions at both ends. The left-bent crank 66 and the right-bent crank 67 each have straight rod sections 661 and 671 connecting to the crankshaft 61. The straight rod section 661 of the left-bent crank 66 and the straight rod section 671 of the right-bent crank 67 are respectively connected to bent rod sections 662 and 672 that are inclined to the same side, wherein the bent rod sections 662 and 672 are relatively straight. The deflection direction of segments 661 and 671 can be the same as or opposite to the direction of motion of the left-bent crank 66 and the right-bent crank 67, so that there is a deflection angle between the straight segments 661 and 671 and the bent segments 662 and 672 of the left-bent crank 66 and the right-bent crank 67. The deflection angle is greater than 90 degrees and less than 180 degrees, so as to ensure that the left-bent crank 66 and the right-bent crank 67 can generate a diagonal component force at both vertical and horizontal points during rotational motion. The right-bend crank 67 is locked to both ends of the crank shaft 61 by the ends of the straight rod segments 661 and 671 respectively. The left-bend crank 66 and the right-bend crank 67 are further pivotally connected to the ends of the left connecting rod 68 and the right connecting rod 69 by the ends of the bent rod segments 662 and 672 respectively. Furthermore, the other ends of the left connecting rod 68 and the right connecting rod 69 are pivotally connected to the ends of the opposite left handrail rocker 56 and right handrail rocker 57. The left connecting rod 68 and the right connecting rod 69 are provided with pedals 681 and 691 for the user to step on.

[0077] This allows for the creation of an elliptical trajectory motion device with a curved crank that avoids dead zones in motion.

[0078] In practical use, the elliptical trajectory motion device with a curved crank of this utility model, such as... Figure 3 , Figure 5As shown, when exercising, the user can sit on the seat cushion 35 of the support structure 30, and place the left and right feet of the lower body on the pedals 681 and 691 of the left connecting rod 68 and right connecting rod 69 of the pedal structure 60 respectively. At the same time, the left and right hands of the upper body hold the upper part of the left armrest rocker arm 56 and right armrest rocker arm 57 of the rocking structure 50 respectively. When the user steps on the pedals 681 and 691 of the left connecting rod 68 and right connecting rod 69, the characteristic of arc reciprocating swing operation can be achieved by the alternating operation of the left curved crank 66 and right curved crank 67 to rotate the crank shaft 61, and drive the wheel blade assembly 41 to rotate through the transmission component 63 to generate a motion load. The left connecting rod 68 and right connecting rod 69 simultaneously drive the left armrest rocker arm 56 and right armrest rocker arm 57 to make the hands swing alternately, allowing the user to achieve ankle twisting, thereby driving a large amount of movement of the leg, hip and whole body curves, and thus achieving the effect of whole body exercise.

[0079] like Figure 6 , Figure 7 As shown, since a crankshaft 61 is pivotally mounted at the top of the riser 32 of the support frame 31, and the crankshaft 61 has left-curved cranks 66 and right-curved cranks 67 extending in opposite directions on both sides, when the left connecting rod 68 and right connecting rod 69 are stepped on, the crankshaft 61 is driven alternately by the left-curved cranks 66 and right-curved cranks 67. When the left-curved cranks 66 and right-curved cranks 67 rotate to a vertical position T perpendicular to the ground, a downward vertical component force and a horizontal oblique component force will be generated along the curved rod segments 662 and 672, so as not to produce a "dead angle state", thus avoiding the feeling of a sudden stepping. Figure 6 [As shown]; Furthermore, when the left-hand crank 66 and the right-hand crank 67 rotate to the horizontal position S parallel to the ground, a horizontal component force and a vertical component force will be generated along the curved segments 662 and 672, preventing a "sudden drop" and thus avoiding the sudden drop sensation of stepping into the air [as shown]. Figure 7 As shown in the image.

[0080] As can be seen from the above description of its structure and use, the elliptical trajectory exercise device with curved cranks of this utility model utilizes the design of the left curved crank 66 and right curved crank 67 of the pedaling structure 60, which has straight rod sections 661 and 671 and corresponding curved rod sections 662 and 672. This design allows the left curved crank 66 and right curved crank 67 to have an oblique angle, which is greater than 90 degrees and less than 180 degrees. This ensures that when the left curved crank 66 and right curved crank 67 rotate, regardless of whether they are in the vertical position T or the horizontal position S, they can generate an oblique component force along the curved rod sections 662 and 672. This avoids the jerking sensation caused by dead angles or the sudden drop caused by the lack of vertical component force during movement. This further improves the smoothness of the pedaling action, makes the movement more stable, and greatly improves the safety of the exercise.

Claims

1. An elliptical trajectory motion device with a curved crank, comprising at least a base structure, a support structure, a load structure, a rocking structure, and a pedaling structure, wherein the support structure has a support frame disposed on the base structure, and the load structure is disposed on the support structure to connect to the pedaling structure and provide motion load; the rocking structure has a left handrail and a right handrail pivotally mounted at the middle on both sides of the front end of the support frame of the support structure; the pedaling structure is disposed between the rear end of the support structure and both sides of the rocking structure; the pedaling structure has a crank shaft pivotally mounted on the support frame, so that when the crank shaft is operated, it can synchronously drive the load structure to generate motion load; characterized in that... The crankshaft has left-bent cranks and right-bent cranks extending coaxially but in opposite directions at both ends. The left-bent cranks and right-bent cranks each have a straight rod section connected to the crankshaft. The straight rod section of the left-bent cranks and right-bent cranks is connected to a bent rod section that deviates to the same side. There is a deviating angle between the straight rod section and the bent rod section. The left-bent cranks and right-bent cranks are locked to both ends of the crankshaft at the ends of the straight rod sections. The ends of the left-bent cranks and right-bent cranks are pivotally connected to the ends of the left and right connecting rods at the ends of the bent rod sections. The other ends of the left and right connecting rods are pivotally connected to the ends of the opposite left and right handrail rockers. This ensures that, during rotational motion, whether at a vertical or horizontal point, the left-bent crank and the right-bent crank can generate an oblique component force along the curved rod segment, thus forming an elliptical trajectory motion device with curved cranks that avoids dead angles in motion.

2. The elliptical trajectory motion device with a curved crank as described in claim 1, characterized in that, The bending section of the left-bending crank and the right-bending crank has the same direction of deviation relative to the straight section as the direction of motion.

3. The elliptical trajectory motion device with a curved crank as described in claim 1, characterized in that, The bent rod section of the left-bend crank and the right-bend crank has an oblique direction relative to the straight rod section that is opposite to the direction of motion.

4. The elliptical trajectory motion device with a curved crank as described in claim 1, characterized in that, The skew angle is greater than 90 degrees and less than 180 degrees.

5. The elliptical trajectory motion device with a curved crank as described in claim 1, characterized in that, The base structure has a main frame rod and horizontal legs at both ends of the main frame rod, and the support of the bracket structure is mounted on the main frame rod.

6. The elliptical trajectory motion device with a curved crank as described in claim 5, characterized in that, The support frame includes a vertical tube erected at the rear end of the main frame rod and two fork tubes erected on both sides of the front end of the main frame rod. The load structure mainly pivots the impeller assembly between the fork tubes, and the impeller assembly has a driven wheel on one side of the shaft. The crank shaft is provided with a transmission wheel corresponding to the driven wheel, so as to connect the driven wheel and the transmission wheel by a transmission component, so that when the crank shaft is operated, the impeller assembly can be driven to generate load synchronously.

7. The elliptical trajectory motion device with a curved crank as described in claim 6, characterized in that, The load structure is provided with a damper on the support frame corresponding to the impeller assembly, which is used to change the motion effect by adjusting the load force of the impeller assembly.

8. The elliptical trajectory motion device with a curved crank as described in claim 6, characterized in that, The stepping structure has a cover on both sides of the support frame that can cover the transmission component.

9. The elliptical trajectory motion device with a curved crank as described in claim 1, characterized in that, The support frame of the bracket structure has a seat tube for selective insertion of the seat cushion assembly.

10. The elliptical trajectory motion device with a curved crank as described in claim 1, characterized in that, The left and right connecting rods are each equipped with pedals for the user to step on.

Images