TWI527609B - Collapsible elliptical sports machine - Google Patents

Description

Foldable elliptical exercise machine

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

The TW I373350 patent discloses a collapsible elliptical exercise machine, the main feature of which is that a rear side of the main frame body (20) is pivotally mounted with a rail frame (flip frame) that can be deflected between the use angle and the folding angle (40). The left and right two pedals (55) are respectively coupled between the front and rear ends of a corresponding driving rod (support rod) (50), and the front end of each driving rod (50) is pivotally connected to the main frame body ( 20) corresponding crank (32), the rear end can slide on the corresponding rail (41) of the rail frame (40); if necessary, as long as the rear end of the rail frame (40) is raised to an upright shape and locked, That is to complete the folding action.

In the prior art, the pivot axis (45) of the rail frame (40) relative to the main frame body (20) is higher than the ground distance, so that the rail frame (40) has a large possible deflection angle (principle as In the 19th figure of the case); however, the related structure completed by the aforementioned pivot axis (45) has some disadvantages in practice, for example, in order to avoid the front end portion of the rail frame (40) and the left and right sides. The driving rod (50) or the left and right two links (65) interfere with each other, and the rail frame (40) is designed to extend a long arm (44) from the center of the width thereof, and the front end of the long arm (44) is pivotally connected. In the central position of the width of the main frame body (20), but in this way, because the rail frame (40) itself and the weight it receives during the deflection process are supported by the front end of the long arm (44), and the rail frame (40) The weights on the left and right sides are not necessarily equal, so the aforementioned pivotal structure may be more prone to loosening. At the same time, because the pivot axis (45) of the rail frame (40) is located at a higher position, and the flywheel is disposed at a position higher than the crank mechanism (30) in order to avoid the front end portion of the rail frame (40), the main frame The overall center of gravity of the body (20) is high, affecting the stability of the rail frame (40) when deflected.

In addition, in practice, the lower half of the main frame body (20) of the elliptical exercise machine is bound to provide a housing for covering the flywheel, the transmission mechanism, the circuit system, etc. In the meantime, the aforementioned housing must have a longitudinal slot at the center of the width of the rear side thereof for the long arm (44) of the rail frame (40) to pass through, and allows the long arm (44) to be moved up and down within a corresponding angular range. Displacement. Opening the aforementioned slot obviously detracts from the intention and function of the housing, for example, the covering is incomplete, and dust, sweat, foreign matter, etc. are relatively easy to enter the inside of the housing.

Furthermore, after the elliptical exercise machine of the previous case is folded, the movable members such as the crank (32), the driving rod (50), the connecting rod (65), and the swing arm (60) may also slide or swing (if Cases 12 and 15 show that there are safety concerns, especially when moving the elliptical exercise machine, the unstable state of the aforementioned components will be greatly plagued.

The main object of the present invention is to provide a collapsible elliptical exercise machine, wherein the matching structure between the rail frame and the main frame body is ideal, and the overall stability of the elliptical exercise machine can be improved, and the design is also easy to arrange. Other components.

Another object of the present invention is to provide a collapsible elliptical exercise machine in which the housing can completely cover the lower half of the main frame body to perform functions such as appearance, safety, and cleaning.

It is still another object of the present invention to provide an elliptical exercise machine that can be folded, which can automatically lock the movable member after folding, and automatically unlock the state when deployed, which is convenient and safe.

In order to achieve the foregoing objective, the collapsible elliptical exercise machine provided by the present invention comprises: a main frame body having a base, the base having a front end and a rear end; a left crank and a right crank, according to one The first horizontal axis is pivotally disposed on the main frame body; a flywheel is pivotally disposed on the main frame body according to a second horizontal axis, and is coupled with the two cranks; the second horizontal axis is closer to the first horizontal axis a rear end of the base; a casing disposed on the main frame body and covering the flywheel, having a left side surface and a right side surface; a rail frame having two left and right arms fixed to each other and left and right sides Each of the arms has a front end, and the front ends of the two arms are respectively located outside the left and right sides of the casing, and are pivotally disposed on the base of the main frame according to a third horizontal axis, so that the foregoing The rail frame can be deflected between the use angle and a folding angle with respect to the main frame body; the third horizontal axis is located between the front and rear ends of the base, and is located The bottom side of the flywheel, when the rail frame is located at the folding angle, a part of the casing is interposed between the left and right arms; the rail is located at a rear side of the arm, and each of the rails is integrated a continuous basic section and an extended section, wherein the extension section is farther from the arm than the basic section, and the length of the extension section is less than half of the length of the basic section; a left driving rod and a right driving rod, each of the foregoing driving The front end of the rod has a front end and a rear end, and the front ends of the left and right second moving rods are respectively pivotally connected to the left and right cranks, and the rear ends of the left and right second moving rods are respectively slidable along the guide rail and can be deflected relative to each other. The method is matched on the left and right guide rails; when the rail frame is located at the use angle, the front end of the driving rod is circularly moved along a circular trajectory centered on the first horizontal axis, The rear end of the driving rod reciprocates between the front and rear ends of the basic section of the guide rail; when the rail frame is located at the folding angle, the rear end of the second driving rod is still divided Holding the two guide rails, and at least one rear end of the driving rod is located at an extension of the corresponding rail; a left pedal and a right pedal are respectively coupled to the left and right second rods in a mutually movable manner. When the rail frame is located at the aforementioned use angle, the front end of the driving rod is reciprocated in a circular motion and the rear end is reciprocated, and the pedal moves along a closed trajectory.

Thereby, because the pivot axis of the aforementioned rail frame is closer to the ground, and the aforementioned fly The wheel can be arranged at a lower position and the weight is above the pivot axis of the rail frame, etc., so that the overall stability of the elliptical machine can be improved; and because the aforementioned housing does not need to open a longitudinal slot for the aforementioned rail frame to pass through, The lower half of the main frame body can be relatively completely wrapped to perform functions such as appearance, safety, and cleaning.

According to a preferred embodiment of the present invention, the front end of the rail frame and the flywheel are An automatic urging device is disposed between the squeezing portion and the squeezing portion; the squeezing portion is located at a position that is not in contact with the flywheel; When the rail frame is deflected to the folding angle by the use angle, the pressing portion is correspondingly displaced to a position capable of pressing the flywheel. Thereby, the elliptical motion machine can automatically lock the movable member such as the crank and the driving rod after the folding, and automatically unlock the state when the user is deployed, which is convenient and safe.

10‧‧‧Main frame

11‧‧‧Base

111‧‧‧中管

112‧‧‧cross tube

113‧‧‧ shaft tube

114‧‧‧ front end mat

115‧‧‧Back end mats

116‧‧‧ bolt

117‧‧‧ ear

118‧‧‧ gap

119‧‧‧ ear

110‧‧‧ gap

12‧‧‧ bracket group

13‧‧‧ pole

22‧‧‧ crank

221‧‧‧ crank stem

23‧‧‧ crankshaft

24‧‧‧Flywheel

26‧‧‧Large pulley

28‧‧‧Drive belt

32‧‧‧ housing

321‧‧‧left side

322‧‧‧ right side

34‧‧‧ instrument cluster

36‧‧‧ grip group

38‧‧‧Mobile wheels

40‧‧‧ rail bracket

41‧‧‧ Arm

42‧‧‧rails

421‧‧‧Basic section

422‧‧‧Extension

43‧‧‧ front end rail

431‧‧‧Long slot

44‧‧‧Intermediate crossbar

441‧‧‧ ear

45‧‧‧Back end rail

46‧‧‧ front end pads

47‧‧‧Back end mats

48‧‧ ‧ baffle

481‧‧‧ card slot

52‧‧‧Drive rod

53‧‧‧Roller

54‧‧‧

55‧‧‧ shaft tube

56‧‧‧ pedal

62‧‧‧ swing arm

63‧‧‧ grip

64‧‧‧ linkage

70‧‧‧ pneumatic support rod

71‧‧‧ first end

72‧‧‧ second end

80‧‧‧ Telescopic rod

81‧‧‧External management

811‧‧‧ openings

82‧‧‧ inner rod

821‧‧‧Positioning holes

85‧‧‧Locking mechanism

86‧‧‧ deflecting parts

87‧‧‧Locating pin

88‧‧‧ Pressing department

90‧‧‧Automatic tightening device

91‧‧‧ Pushing parts

911‧‧‧ surface

912‧‧‧ Short-cut section

913‧‧‧Long Path Department

92‧‧‧ displacement parts

93‧‧‧Flexible parts

94‧‧‧ deflection arm

95‧‧‧Resistance wheel

A1‧‧‧ first horizontal axis

A2‧‧‧ second horizontal axis

A3‧‧‧ third horizontal axis

A4‧‧‧ fourth horizontal axis

A5‧‧‧ fifth horizontal axis

C1‧‧‧ recent circumference

C2‧‧‧ farthest circumference

C3‧‧‧ extreme circumference

C4‧‧‧ deflection circumference

S‧‧‧ support surface

L‧‧‧ connection line

L1‧‧‧ crank length

L2‧‧‧Drive rod length

L3‧‧‧ ultimate circumferential radius

P1‧‧‧ Front Reentry Point

P2‧‧‧return point

Starting point for P3‧‧

P4‧‧‧ intersection/limit point

T1‧‧‧round track

T2‧‧‧ reciprocating track

T3‧‧‧ curved track

T4‧‧‧closed track

Figure 1 is a left rear perspective view of a preferred embodiment of the present invention in use.

Fig. 2 is a right rear perspective view of a preferred embodiment of the present invention corresponding to the state of Fig. 1.

Figure 3 is a left side view of the preferred embodiment of the present invention corresponding to the state of Figure 1, but with the left half of the housing and the crank cover removed.

Figure 4 is a bottom view of a preferred embodiment of the present invention corresponding to the state of Figure 1.

Fig. 5 is a view showing the structure of the casing, the lower half of the main frame and the rail frame in a preferred embodiment of the present invention, and simply shows the joint relationship therebetween.

Figure 6 is a diagram showing the principle of the range of movement of the rod in a preferred embodiment of the present invention.

Figure 7 is a left side elevational view of a transitional state between a use state and a collapsed state in accordance with a preferred embodiment of the present invention.

Figure 8 is a left rear perspective view of the preferred embodiment of the present invention in a folded state.

Figure 9 is a left side view of a preferred embodiment of the present invention corresponding to the state of Figure 8.

Fig. 10A is a cross-sectional view taken along the line I-I in Fig. 4, showing the locking relationship between the rail frame and the main frame when the angle of use is used.

Figure 10B is similar to Figure 10A, but shows the locking relationship between the rail frame and the main frame when it is at the folding angle.

Figure 11 is a longitudinal cross-sectional view of the telescopic rod in a folded state in accordance with a preferred embodiment of the present invention.

Fig. 12 is a view showing "limit circumference" and "deflection circumference" in a preferred embodiment of the present invention, and shows the influence of other parameters on the aforementioned circumference.

Fig. 13A is a cross-sectional view taken along line II-II of Fig. 4, showing the state of the automatic pressing device in a state of use according to a preferred embodiment of the present invention.

Fig. 13B is similar to Fig. 13A, but shows the state of the automatic pressing device in the folded state in a preferred embodiment of the present invention.

The structure, actions and effects of a preferred embodiment of the present invention are described in detail below with reference to the drawings. Please refer to Figures 1 to 3 first. The elliptical exercise machine of this embodiment mainly comprises a main frame body (10), two left and right cranks (22) and a flywheel (24) pivoted on the main frame body (10). a housing (32) fixed to the main frame body (10), a rail frame (40) connected to the rear of the main frame body (10), coupled to the two cranks (22) and the rail frame (40) Between the left and right two driving rods (52), the left and right two swing arms (62) respectively located on both sides of the main frame body (10), the two second swing arms (62) and the two second moving rods ( 52) left and right two links (64), and left and right two pedals (56) respectively fixed to the rear ends of the two links (64).

Please refer to FIG. 3 (note: the left half of the casing (32) is removed), and the main frame body (10) mainly comprises a base (11) which can be placed on a supporting surface (for example, the ground), A bracket set (12) secured to the base (11) and a post (13) extending upwardly from the top of the bracket set (12). Referring to FIG. 4 and FIG. 5 together, the base (11) has a middle tube (111) extending axially along the front and rear, and the front end of the middle tube (111) is fixed to a horizontal tube extending in the left and right axial direction (112). ), the central rearward position of the middle tube (111) is fixed to a shaft tube (113) extending in the left and right axial direction. The left and right ends of the horizontal tube (112) are respectively provided with a front end pad (114), and the rear end of the middle tube (111) is provided with a rear end foot pad (115), and the main frame body (10) can utilize the base ( The foot pads (114) (115) of 11) are smoothly supported on the aforementioned support surface. The top end of the pole (13) is fixed to a meter group (34) and a grip group (36).

The two cranks (22) are pivotally mounted on the bracket set (12) of the main frame body (10) according to a first horizontal axis (A1), and more specifically, a crank shaft (23) (see FIG. 3). The armature is pivotally disposed on the bracket group (12) corresponding to the left and right axial directions, and the left and right cranks (22) are respectively fixed to the opposite ends of the crank axle (23), and the two cranks (22) are The outer end is 180 degrees opposite to the center of the crankshaft (23). In addition to Figure 3, the crank (22) in the other drawings contains a decorative cover; however, in Figure 3, the cover is removed and only the crankshaft (221) is shown.

Referring to FIG. 3, the flywheel (24) is pivotally mounted on the bracket set (12) of the main frame body (10) according to a second horizontal axis (A2), and the bottom side of the flywheel (24) is moderately close to the base (11). The top of the middle tube (111). The axial position of the flywheel (24) (ie, the second horizontal axis (A2)) is closer to the axial position of the aforementioned two cranks (22) (ie, A horizontal axis (A1) is closer to the rear end of the base (11). In the present embodiment, the second horizontal axis (A2) is located below and behind the first horizontal axis (A1), but other permissible in the present invention In an embodiment, the second horizontal axis may not be lower than the first horizontal axis, or may not be further rearward than the first horizontal axis.

A large pulley (26) is coaxially fixed on the crank shaft (23), and the right side of the flywheel (24) A small pulley (not shown) is coaxially fixed on the side, and a transmission belt (28) is wound between the two pulleys so that the crank (22) and the flywheel (24) can be linked at a predetermined speed ratio, thereby being cranked. (22) A predetermined inertial force is generated when rotating. In addition, the flywheel (24) can be equipped with various resistance devices (not shown) conventionally used in the art, such as an eddy-current brake (ECB) that can be controlled via the aforementioned instrument cluster (34). The additional predetermined resistance must also be overcome when the crank (22) is rotated.

The foregoing housing (32) is fixed to the lower half of the main frame body (10), and completely covers the bracket group (12) and the flywheel (24), the large pulley (26), the small pulley, the transmission belt (28), the resistance device and the circuit system disposed on the bracket group, and the bottom of the housing (32) covers the base (11) Partially - except for the left and right ends of the cross tube (112) of the base (11), the left and right ends of the shaft tube (113), and the rear end of the middle tube (111) are exposed outside the casing (32). The left and right ends of the crankshaft (23) respectively pass through the left side surface (321) and the right side surface (322) of the housing (32), in other words, the two cranks (22) are respectively located on the left side of the housing (32) Outside the right second side (321) (322), it is not covered by the casing (32). The crank structure may be replaced by other means. For example, in another embodiment of the present invention, a circular notch with a crankshaft centered on the crank shaft and a radius of the crank length is formed on each of the left and right sides of the housing, and the crank is provided. The left and right ends of the shaft are coaxially fixed to each other to fill the disc of the gap, and the outer ends of the two cranks (22) are replaced by the symmetric two positions on the left and right discs near the circumference; Prior art in the field.

Referring to Figures 4 and 5, the aforementioned rail frame (40) has a rearward extension Two left and right arms (41), two left and right guide rails (42) extending rearward from the rear ends of the two arms (41), respectively, are fixed between the front ends of the two arms (41) a front crossbar (43), an intermediate crossbar (44) fixed between the intermediate portions of the two rails (42), and a rear crossbar fixed between the rear ends of the two rails (42) (45). The arm (41), the guide rail (42), the front end crossbar (43) and the rear end rail (45) together form a substantially rectangular frame. The front end of the rail frame (40) is pivotally disposed between the front and rear ends of the base (11) of the main frame body (10) according to a third horizontal axis (A3). More specifically, the base (11) The shaft tube (113) axis serves as the third horizontal axis (A3), and the front end rail (43) of the rail frame (40) is coaxially pivoted through the shaft tube (113) of the base (11), and the left side of the rail frame (40) The front ends of the right two arms (41) are respectively fixed to the front end rail (43) protruding axis The left and right ends of the outer portion of the tube (113) enable the entire rail frame (40) to be deflected up and down relative to the main frame body (10) according to the third horizontal axis (A3). In the present embodiment, the range of rotation of the rail frame (40) is limited between an angle (hereinafter referred to as an angle of use) as shown in Fig. 3 and an angle (hereinafter referred to as a folding angle) as shown in Fig. 9. When the rail frame (40) is at the use angle, the front end pad (46) and the rear end pad (47) on the bottom side of the rail frame (40) are simultaneously supported on the aforementioned support surface (for example, the ground), and the guide rail (42) Adjacent to and parallel to the support surface, extending axially along the front and rear. When the rail frame (40) is at the folding angle, the rear end of the rail (42) is located at the rear upper side of the front end, and the inclination is nearly 70 degrees; meanwhile, the left and right arms (41) of the front end of the rail frame (40) are the same. The slopes are respectively located on the left and right sides of the rear half of the casing (32) such that the casing (32) is partially interposed between the left and right arms (41). The means for limiting the rail frame (40) to the aforementioned angle will be described later.

The front end of each of the aforementioned driving rods (52) is pivotally connected to the outer end of the corresponding crank (22), and then The end pivots a roller (53) corresponding to the left and right axial directions, and the roller (53) is rollably disposed on the top surface of the corresponding rail (42), thereby driving the rear end of the rod (52) It can slide linearly along the guide rail (42), and the driving rod (52) and the guide rail (42) can be relatively deflected according to the axial center of the roller (53). As shown in Fig. 3, when the rail frame (40) is at the use angle, the front end corresponding to the driving rod (52) is circularly moved along a circular path (T1) centered on the first horizontal axis (A1). The rear end of the driving rod (52) reciprocates on the guide rail (42) along a reciprocating track (T2) parallel to the guide rail (Note: the reciprocating track (T2) indicated in the figure is the axis of the roller (53). The heart is the benchmark). In Fig. 3, the rear end of the left driving rod (52) on the left side of the elliptical motion machine is located at the rear turning point (P2) of the reciprocating trajectory (T2), and the rear end of the right driving rod (52) is substantially located in the reciprocating trajectory. Front turnback point (P1) of (T2).

Figure 6 is a simple illustration of the trajectory of the front and rear ends of the rod (52) - that is, The relative relationship and structural principle of the circular trajectory (T1) and the reciprocating trajectory (T2). In the figure, the horizontal line S represents the aforementioned supporting surface, and the circular trajectory (T1) has a first horizontal axis (A1) as a center and a crank length as a radius, and the circular arcs C1 and C2 also have a first horizontal axis (A1) as a center. Among them, C1 located in the inner ring represents "the boundary of the leading end of the driving rod (52) which can be closest to the center (A1)", and the radius thereof is "the linear distance between the front and rear ends of the driving rod (52) minus the circular shape. The radius of the trajectory (T1) (Note: Because when the rear end of the driving rod (52) can no longer be closer to the aforementioned center (A1), the center of the circle (A1) will be located on the connecting line between the front and rear ends of the driving rod (52). The arc C2 located on the outer ring represents "the limit of the rear end of the driving rod (52) which can be farthest from the center (A1)", and the radius is "the linear distance between the front and rear ends of the driving rod (52) plus The radius of the circular trajectory (T1) (Note: Because when the rear end of the driving rod (52) can no longer be farther away from the center (A1), the connecting line between the front and rear ends of the driving rod (52) will directly point to the center of the circle ( A1)). Based on the height of the rear end of the driving rod (52) (for example, based on the axis of the aforementioned roller (53)) relative to the supporting surface (S), we can respectively obtain the nearest circumference (C1) and the farthest circumference (C2). The position of the front turnback point (P1) and the back turnback point (P2). It can be understood from Fig. 6 that in this type of structure, the distance between the front and back two return points (P1) (P2) (that is, the length of the reciprocating track (T2)) is approximately equal to the aforementioned two arcs (C1) (C2). The radial spacing (i.e., the diameter of the circular trajectory (T1), or twice the length of the crank), such as in the present embodiment, the crank length (note: defined as the driving rod (52) relative to the crank (22) The distance from the pivot axis to the first horizontal axis (A1) is approximately 25.4 cm, and the distance between the front and rear two return points (P1) (P2) is approximately 53.8 cm; in other words, the length of the reciprocating track (T2) is mainly It changes with the length of the crank and does not change significantly because of the length of the driving rod (52). (Note: In fact, if other conditions are not changed, the rod (52) will grow and the reciprocating path will be reversed (T2). Slightly shortened). Incidentally, the two driving rods (52) in Fig. 6 respectively indicate two states when the rear end of the rod is located at the front turning point (P1) and the rear turning point (P2), not showing the left side under the same time, The second right is the lever (52).

Please refer to Figures 1 to 4 again, each of the aforementioned pedals (56) can be driven by each other. The manner is matched with the corresponding driving rod (52). In this embodiment, a shaft tube (55) corresponding to the left and right axial direction is preset between the front and rear ends of each driving rod (52), and the shaft is The core forms a fourth horizontal axis (A4), and each of the connecting rods (64) pivotally connects a predetermined portion between the front and rear ends thereof to the outer end of the corresponding shaft (55) of the driving rod (52). The pair of connecting rods (64) and the driving rod (52) are relatively deflected according to the corresponding fourth horizontal axis (A4); the left and right second swing arms (62) are respectively swayed in a manner of being able to swing back and forth. The fifth horizontal axis (A5) is respectively pivoted on the left and right sides of the pole (13) of the main frame body (10), and a proximal end portion of each swing arm (62) forms a grip (63); each connecting rod The front end of the movable (64) is pivotally connected to the bottom end of the corresponding swing arm (62), and each pedal (56) is fixed to the inner side of the rear end of the corresponding connecting rod (64) on the corresponding fourth horizontal axis ( A4) Rear, and the rear end of each pedal (56) is located further rearward than the rear end of the corresponding driving rod (52) (see Figs. 3 and 4). Thereby, corresponding to the front end of the driving rod (52) for circular motion and reciprocating rear end, the front end of the connecting rod (64) will follow an arcuate trajectory (T3) centered on the fifth horizontal axis (A5). The back and forth reciprocating displacement, at the same time, the pedal (56) will move along an elliptical closed trajectory (T4) (Note: the closed trajectory (T4) indicated in the figure is based on the front end of the pedal (56)), and during the movement process The angle between the pedal (56) and the driving rod (52) periodically changes. As mentioned before, the rear end of the rod (52) is on the guide rail (42) The length of the reciprocating trajectory (T2) taken up is substantially equal to the diameter of the circular trajectory (T1), so the long axis length of the closed trajectory (T4) (generally referred to as the stroke length of the pedal (56)) is also substantially equal to The diameter of the circular trajectory (T1).

The connecting structure between the driving rod (52), the connecting rod (64) and the pedal (56) can be It can be replaced by other means. For example, in another embodiment of the present invention, the pedal directly pivots its front end according to a lateral axis (position corresponding to the fourth horizontal axis (A4), for example, before and after the driving rod. Between the ends, the connecting rod is not directly pivoted to the driving rod, but the rear end of the connecting rod is also fixed to the outside of the pedal (note: the connecting rod and the driving rod can also be deflected according to the aforementioned axis), and the same can be achieved. Pedal movement. In other embodiments of the present invention, the aforementioned connecting rod (64) and the swing arm (62) may not be provided. Instead, the pedal is directly fixed between the front and rear ends of the driving rod, and can also be along an elliptical shape. Closed trajectory movement.

As shown in Figures 1 to 3, when the rail frame (40) is at the angle of use, the front The elliptical exercise machine is in a state of being usable for movement. When in use, the user steps on the left and right pedals (56), hands select the fixed grip group (36) that captures the top of the main frame (10), or selects the left and right to swing back and forth. Right second grip (63). As shown in Fig. 3, when the user applies a force on both feet (and the two hands are cooperatively biased via the grip (63)) to move the pedal (56) along the closed trajectory (T3), the front end and the rear of the rod (52) are driven. The ends move along the circular trajectory (T1) and the reciprocating trajectory (T2) respectively, and the left and right feet (and the left and right hands) are reversely moved through the symmetrically arranged left and right cranks (22), and by the aforementioned flywheel (24) and the resistance device obtains the motion inertia and resistance.

Please refer to Figure 3, when the rear end of one of the driving rods (52) is located in the reciprocating track (T2) At the rear turnback point (P2), there is still a distance between the rear end of the aforementioned driving rod (52) and the last end of the guide rail (42), and the trailing edge of the corresponding pedal (56) is substantially located on the guide rail (42). ) directly above the last end. In fact, the portion of each of the guide rails (42) for supporting and guiding the rear end of the driving rod (52) includes an integral continuous basic section (421) and an extended section (422), wherein the basic section (421) refers to the guide rail (42) a section corresponding to the reciprocating trajectory (T2), and the extension section (422) refers to a section from the rear end of the basic section (421) to the rear end of the guide rail (42), specifically, in this embodiment The rear end of the rail frame (40) is provided with left and right baffles (48), and each baffle (48) has a slot (481) with a notch facing the front end of the rail frame (40), corresponding to the card slot. (481) The position of the closed end is the last end of the guide rail (42). The length of the aforementioned extension (422) is less than half of the length of the basic section (421). In this embodiment, the length of the basic section (421) is approximately 53.8 cm. The length of the extension (422) is approximately 21.4 cm.

When the elliptical exercise machine is not used, the user can choose to convert it into the first The collapsed state shown in Fig. 8 and Fig. 9. When folding, the user can stand behind the elliptical exercise machine, lower the body and grasp the rear crossbar (45) of the rail frame (40) and pull it straight up to make the rail frame (40) with its front end. The crossbar (43) is axially forwardly deflected, and the rail frame (40) is again supported and pushed until the aforementioned folding angle is reached. In this embodiment, the difference between the folding angle and the use angle is nearly 70 degrees.

As in the transition state illustrated in Fig. 7, when the rail frame (40) is oriented upward from the use angle When the front is deflected, the rear end of the driving rod (52) which is placed on the guide rail (42) is also lifted together, and after the rail frame (40) is deflected by a certain angle, at least one rear end of the driving rod (52) is driven. It will slide into the extension (422) along the guide rail (42) over the corresponding portion of the rear turnback point (P2). As shown in FIGS. 8 and 9, when the rail frame (40) is at the folding angle, the rear end of one of the driving rods (52) (for example, the left driving rod in the drawing) is located substantially at the corresponding rail (42). In the last end, in more detail, the protruding pin (54) provided on the inner side of the roller (53) at the rear end of the driving rod (52) will abut the closed end of the card slot (481) at the rear end of the rail frame (40). , or at least in the interior of the card slot (481) and close to the closed end; the rear end of the other driving rod (52) (such as the right driving rod in the figure) will be located at a lower position on the rail (42), in this embodiment In the example, it is also located in the extension section (422); the left and right two links (64) are turned into a vertical shape by pulling the rear end of the driving rod (52), and the left and right two swing arms (62) are Approximate overlap in side view (see Figure 9). Regardless of the state in which the components of the elliptical exercise machine are stopped before the folding, the user can directly perform the above-mentioned folding operation, and the above state will be exhibited after the folding.

Please refer to Figures 10A and 10B for the front crossbar (43) of the rail frame (40). The material is a circular tube having a circular cross section, and a predetermined slot on the wall of the tube is provided with a long slot (431) extending approximately one quarter of a circle along the circumference; on the other hand, the main frame (10) A corresponding position on the shaft tube (113) is locked with a bolt (116), and the tail portion of the bolt (116) passes through the long slot (431) of the front cross rail (43) from the outside to the inside. When the rail frame (40) is at the use angle, the tail of the bolt (116) substantially corresponds to one end of the long slot (431), as shown in Fig. 10A. When the rail frame (40) is deflected upward and forward by the use angle, the front end rail (43) is deflected in situ according to the third horizontal axis (A3), and the other end is deflected to the other end of the long slot (431). 116) The tail, as shown in Figure 10B.

Please refer to Figures 3 and 8, the base (11) and rail frame (40) of the main frame (10) A gas spring (commonly known as a gas pressure bar) (70) is connected between the first end (71) of the first end (71) pivotally connected to the top side of the rear end of the middle tube (111) of the base (11) ( 117), the second end (72) is pivotally connected to the pre-preset ear piece (441) on the front side of the middle crossbar (44) of the rail frame (40). Since the pivoting axis of the air pressure support rod (70) relative to the base (11) is parallel to the pivot axis (ie, the third horizontal axis (A3)) of the rail frame (11) relative to the base (11), the air pressure is independent. The support rod (70) is elongated or shortened along its long axis as the rail frame (40) is deflected. As shown in FIG. 3, when the rail frame (40) is at the use angle, the air pressure support rod (70) exhibits a tilted state extending from the first end (71) to the rear end to the second end (72), and first The end (71) is located above the connecting line (L) of the second end (72) and the third horizontal axis (A3), and further, the pneumatic support rod (70) is in a compressed state (but not yet compressed to the limit), That is, the elastic restoring force is elongated along its long axis, whereby the air pressure support rod (70) applies a deflection to the rail frame (40) corresponding to the angle of use from the folding angle (corresponding to the third figure) The torque in the clockwise direction assists in pressing the rail frame (40) against the angle of use that is flat against the ground. As shown in Figures 8 and 9, when the rail frame (40) is at the folding angle, the air pressure support rod (70) presents an upright extension from the first end (71) to the second end (72). In the state, the intermediate portion of the rail frame (40) which is tilted upward by the tension is formed to form a supporting device for supporting the rail frame (40) in the folded state.

In the transition state shown in Fig. 7, the third horizontal axis of the front end of the rail frame (40) (A3), the first end (71) and the second end (72) of the air pressure support rod (70) are arranged in a straight line at three points. In short, the air pressure support rod (70) in the state of Fig. 7 is in a possible expansion and contraction. The shortest length in the range, therefore, the air pressure support rod (70) is slightly shortened while the rail frame (40) is deflected from the angle of use to the angle shown in Fig. 7 (approximately 17 degrees of inclination), and is shown in Fig. 7 From the angle shown to the angle of collapse, the pneumatic support rod (70) will continue to stretch. Therefore, when the user wants to fold the rear end of the rail frame (40) upwards, the user must first overcome the elastic force of the air pressure support rod (70) (even if it is slightly shortened). When the rail frame (40) is deflected beyond a predetermined angle (for example, about 17 degrees), the air pressure support rod (70) applies a deflection to the rail frame (40) corresponding to the angle of use by the angle of use (corresponding to Fig. 7). The torque in the counterclockwise direction assists the rail frame (40) to deflect upwards and forwards, making the user less laborious. On the contrary, when the rail frame (40) is deflected from the direction of the folding angle to the direction of the use angle, the elastic force of the air pressure support rod (70) can slow down the speed and strength of the rail frame (40) to fall down, which is safer.

Referring to Figure 8, a telescopic joint is also connected between the base (11) and the rail frame (40). a rod (80), which is juxtaposed in parallel on the right side of the pneumatic support rod (70), is mainly composed of an outer tube (81) and an inner rod (82) which are coaxially sleeved and can slide relative to each other along the long axis; At one end of the air pressure support rod (70) opposite to the two ends (71) (72), one end of the telescopic rod (80) (the outer end of the outer tube (81) in this embodiment) is also pivotally connected to the base (11). The aforementioned ear (117) at the rear end and the other end (the outer end of the inner rod (82) in this embodiment) are also the aforementioned ears (441) pivotally connected to the intermediate rail (44) of the rail frame (40). Please refer to Fig. 11 to provide a locking mechanism (85) for locking the relative relationship between the two (81) and (82) between the outer tube (81) and the inner rod (82) of the telescopic rod (80), mainly including a deflecting member (86) pivotally disposed outside the inner end of the outer tube (81), and a torsion spring (not shown) for abutting the opposite ends against the outer tube (81) and the deflecting member (86); 86) a positioning pin (87) is disposed on one side corresponding to the extending direction of the inner rod (82), and a pressing portion (88) is disposed on the other side, and the yaw axis is interposed between the positioning pin (87) and the pressing portion ( 88) is perpendicular to the long axis of the telescopic rod (80); the force of the aforementioned torsion spring causes the deflecting member (86) to be deflected forward relative to the outer tube (81) (corresponding to the counterclockwise direction in Fig. 11) The positioning pin (87) is passed from the outside to the inside through a predetermined opening (811) in the wall of the outer tube (81).

When the rail frame (40) is at the folding angle, the telescopic rod (80) presents an upright connection Between the rail frame (40) and the base (11), and elongated to a corresponding length, at this time, as shown in Fig. 11, the positioning pin (87) at the inner end of the outer tube (81) is inserted into the inner rod from the outside to the inside. (82) The positioning hole (821) preset at the inner end locks the relative relationship between the outer tube (81) and the inner rod (82). To put it another way, when the rail frame (40) is deflected upward and forward by the use angle, as the telescopic rod (80) gradually elongates, the inner end of the inner rod (82) gradually approaches the inner end of the outer tube (81) until positioning. When the hole (821) reaches the predetermined position, the positioning pin (87) is inserted, and the inner rod (82) and the outer tube (81) cannot be relatively slipped, that is, the telescopic rod (80) is locked at the corresponding length, so that the rail frame ( 40) Also locked at the corresponding angle (ie, the folding angle) cannot be deflected. Thus, the telescopic rod (40) forms a supporting means for supporting the rail frame (40) in the folded state. When the user wants to deploy the elliptical exercise machine in the folded state, the user can first grasp the rear end rail (45) of the rail frame (40), and then press the deflection member in the middle of the telescopic rod (80) with the foot ( The pressing portion (88) of 86) deflects the deflecting member (86) in reverse (corresponding to the clockwise direction in Fig. 11), and pulls the trailing end of the positioning pin (87) away from the positioning hole of the inner rod (82) (821) ), the telescopic rod (80) is shortened, that is, the rail frame (40) is deflected downward and backward.

Please refer to Figure 9, the pivot axis of the inner end of the crank (22) relative to the main frame (10) The distance from the center (ie the first horizontal axis (A1)) to the outer end of the crank (22) relative to the pivot axis of the driving rod (52) is defined as "crank length (L1)"; the front end of the driving rod (52) is opposite to The pivot axis of the crank (22) is driven The distance of the rear end of the rod (52) with respect to the yaw axis of the guide rail (42) (i.e., the axis of the roller (53)) is defined as "the length of the rod (L2)". Please refer to Fig. 12 again. The arc C3 (hereinafter referred to as the limit circumference) means that after the rail frame (40) is folded, the rear ends of the left and right second belt rods (52) are kept on the guide rails (42). Prerequisitely, the last end of the guide rail (42) can be closest to the boundary of the first horizontal axis (A1), and the limit circumference (C3) is centered on the first horizontal axis (A1) to "drive the length of the rod (L2) The square is subtracted from the square of the crank length (L1) and then the square root is taken as the radius. In detail, assuming that the rear end of the folding guide rail (42) is located exactly on the limit circumference (C3), the rear ends of the left and right second driving rods (52) will abut the rear end of the guide rail (42), and The length of the second rod (L2) and the length of the two cranks (L1) together form an isosceles triangle (see Fig. 12). According to the geometry, the height of the triangle (that is, the radius of the limit circumference (C3)) (L3) is known. The length is exactly as described above; assuming that the rear end of the guide rail (42) is outside the limit circumference (C3), for example, the state shown in Fig. 9, the rear end of the left and right second belt levers (52) may be one. The person is located outside the limit circumference (C3), one of which is located within the limit circumference (C3), but remains on the guide rail (42).

As shown in Figures 9 and 12, the rail frame (40) is biased upwards and forwards from the angle of use. At the time of turning, the last end of the guide rail (42) is moved from the starting point (P3) position along a deflection circumference (C4) centered on the third horizontal axis (A3), the aforementioned deflection circumference (C4) and the aforementioned limit circumference (C3) ) intersecting at a limit point (P4). In this embodiment, the length of the arc from the starting point (P3) to the limit point (P4) is about 76.5 degrees, which is larger than the difference between the aforementioned folding angle and the use angle; in other words, if Without the limitations of the aforementioned telescopic rods (80) and bolts (116) (see Figure 10B), the rail frame (40) can be deflected upwards and forwards by a maximum of approximately 76.5 degrees from the angle of use (note: at this angle, left and right The rear end of the driving rod (52) will simultaneously abut the last end of the guide rail (42).

Based on the previous derivation, under the structure of the upper elliptical exercise machine, the belt If the movable rod (52) can be appropriately shortened, not only the stroke length of the pedal (56) is not detracted, but also the limit circumference (C3) is shortened in the direction of the center (A1) due to the shortening of the radius (L3), and the deflection is made. The intersection of the circumference (C4) and the limit circumference (C3) (ie, the limit point P4) is more inclined to the front upper side, that is, the length of the arc from the starting point (P3) to the limit point (P4) is longer, and the rail frame is enlarged ( 40) Possible deflection angle. In this example, the length of the rod (L2) is approximately 91 cm, which is less than 4 times the length of the crank (L1). On the other hand, under the same length of the rail frame (40) (referring to the distance of A3 to P3), the deflection axis of the rail frame (40) relative to the main frame body (10) (ie, the third horizontal axis (A3) If the front can be moderately advanced, the aforementioned intersection point (P4) can be more biased to the front upper side (Note: However, if the third horizontal axis (A3) is set too far ahead, when the rail frame (40) is moved up and forward After deflection, the rail (40) arm (41) extending from the third transverse axis (A3) to the rear will pass through the circular path (T1), so that in order to avoid the arm (41) ) Interference with the crank (22), the driving rod (52), the swing arm (62), the connecting rod (64), etc., the design of the member will become more complicated). In the present embodiment, the position of the third horizontal axis (A3) in the front-rear axial direction is between the center of the circular trajectory (T1) and the circumferential trailing edge (see Fig. 3), and in the side view, the guide rail The arm (41) of the frame (40) is always outside the circular path (T1) (see Figure 9).

Conversely, the longer drive rod (52) does not contribute to the long stroke of the pedal (56). Degree, but also will increase the length of the front and rear of the elliptical exercise machine, waste the floor space, in addition, the longer the driving rod (52) means that the outer circumference of the limit circumference (C3) is expanded, which will make the deflection circumference (C4) and the limit circumference ( The intersection point (P4) of C3) is closer to the lower rear side; on the other hand, if the deflection axis (A3) of the rail frame (40) is located too far behind the main frame body (10), the intersection point (P4) is also lowered. Position, reducing the possible deflection angle of the rail frame (40). For example, in Fig. 12, assuming that the length of the driving rod is increased from the original L2 to 5 times the crank length (L1), the limit circumference will correspond to the position expanded outward from C3 to C3', and at the same time, the rail frame (40) is assumed. The front end is translated backward from the original A3 to the position of A3' (note: the position of A3' in the figure corresponds to the rear end of the base (11)), and the starting point of the deflection of the last end of the guide corresponds to the position of the original P3 backward to P3', then The deflection circumference (C4') and the limit circumference (C3') will intersect at the limit point (P4'), and the arc length from the start point (P3') to the limit point (P4') is only about 50 degrees. Of course, increasing the radius of the aforementioned deflection circumference (C4'), that is, increasing the length of the rail frame (40), allows the aforementioned intersection point (P4') to be more biased toward the front upper side, thereby increasing the possible deflection angle of the rail frame (40). However, this will not only increase the material cost, but also increase the length of the elliptical exercise machine before and after use, which is not an ideal way.

Please refer to Figures 13A and 13B, on the bottom side of the flywheel (24) and the rail frame (40) An automatic pressing device (90) is disposed between the front ends, and mainly comprises a pushing member (91), a displacement member (92) and an elastic member (93), wherein the pushing member (91) is fixed on the rail frame (40) The top side of the front end crossbar (43) is at the top side of the face, and is exposed on the top side of the shaft tube (113) via a predetermined notch (110) at the center of the shaft tube (113) of the base (11). The deflection action of the rail frame (40) is correspondingly deflected according to the third horizontal axis (A3); the outer surface of the pushing member (91) forms a curved surface (911), and the curved surface (911) cooperates with the deflection of the rail frame (40) The angle extends from a short diameter portion (912) closer to the third horizontal axis (A3) to a long diameter portion (913) farther from the third horizontal axis (A3); the displacement member (92) has a deflection arm (94), one end of the deflection arm (94) is pivotally connected to a predetermined ear piece (119) on the top surface of the middle tube (111) of the base (11), and the outer end is provided with an outer ring as a rubber material. The pressure roller (95), the pressing wheel (95) is located at the bottom side of the flywheel (24); the elastic member (93) is substantially a tension spring, and the opposite ends are respectively hooked on the displacement member (92) The deflecting arm (94) and the bottom surface of the middle tube (111) of the base (11) provide a downward deflection of the displacement member (92), so that the pressing wheel (95) is maintained through the top surface of the middle tube (111). The notch (118) abuts against the curved surface (911) of the pushing member (91).

As shown in Figure 13A, when the rail frame (40) is at the angle of use, the displacement member (92) The pressing wheel (95) abuts against the short diameter portion (912) of the pushing member (91), and the top side of the pressing wheel (95) is spaced apart from the bottom side of the flywheel (24) by an appropriate distance. As the rail frame (40) is deflected upward and forward by the use angle, the pushing member (91) is pushed by the pressing wheel (95) from the portion of the curved surface (911) which is closer to the short diameter portion (912). The pressing wheel (95) is pushed up by the portion of the curved surface (911) which is closer to the long diameter portion (913), so that the pressing wheel (95) gradually approaches the peripheral surface of the flywheel (24), and the deflecting arm (94) is caused. The elastic member (93) is elongated by gradually deflecting upward. As shown in Fig. 13B, when the rail frame (40) is at the folding angle and is locked, the pressing wheel (95) is clamped to the long diameter portion (913) of the pushing member (91) and the flywheel (24). Between the underside surfaces of the bottom side, the flywheel (24) is not free to rotate due to friction. Thereby, when the elliptical exercise machine is folded into the folded state as shown in FIGS. 8 and 9, since the flywheel (24) is locked at the corresponding angle, the crank (22) and the driven lever are included ( 52), the connecting rod (64), the swing arm (62) and other components will also be positioned at the corresponding position, even if subjected to external forces, it will not easily slide or swing, which is safer. For example, when the user wants to move the elliptical exercise machine in the folded state, the user can stand in front of the elliptical exercise machine and grasp the two symmetrical left and right grips (63) with both hands to the base. (11) The front end is the fulcrum to tilt the upper half of the elliptical machine forward and downward, and then the elliptical exercise machine is moved by the moving wheels (38) on both sides of the front end of the base (11) (see Fig. 9). When the elliptical exercise machine is deployed from the collapsed state, the automatic pressing device (90) can automatically release the locked state of the flywheel (24), and the process is as shown in Figs. 13B to 13A, and will not be described again.

The function of the above-described automatic pressing device (90) may be replaced by other structures, for example in In another embodiment of the present invention, the displacement member (92) and the elastic member (93) are not attached to the front end rail (43) of the rail frame (40), and the shape is similar to the pushing member (91). The outer layer of the object is made of rubber, and the outer side surface is similar to the curved surface, and the long diameter portion directly serves as a pressing portion for pressing the peripheral surface of the flywheel (24) (instead of the aforementioned pressing wheel (95)); When the rail frame (40) is at an angle of use, the object has a short-diameter portion of the curved surface facing the bottom side circumferential surface of the flywheel (24). Specifically, the short-diameter portion is located at the axial center of the flywheel (24) (ie, the second horizontal axis) (A2)) and the axis of the front crossbar (43) (ie the third horizontal axis) (A3)) of the connecting line, so that the entire curved surface has no contact with the peripheral surface of the flywheel (42); when the rail frame (40) is deflected to the use angle, the object is correspondingly deflected to face the flywheel (24) with the long diameter portion of the curved surface The bottom side of the bottom side is in close contact with the flywheel (24) so that the flywheel (42) cannot rotate freely due to friction.

The elliptical exercise machine provided by the present invention has at least the following advantages: first, because the pivot axis of the aforementioned rail frame is closer to the ground, and the flywheel can be arranged at a lower position and the weight is pivoted on the rail frame. The upper part of the heart, etc., so that the overall stability of the elliptical exercise machine can be improved; Second, because the aforementioned housing does not need to open a longitudinal slot for the passage of the aforementioned rail frame, the lower half of the main frame body can be relatively completely covered, Third, with the above-mentioned automatic pressing device, the elliptical motion machine can automatically lock the movable members such as the crank and the driving rod after the folding, and automatically unlock the state when deployed, which is convenient. ,Safety.

10‧‧‧Main frame

114‧‧‧ front end mat

13‧‧‧ pole

22‧‧‧ crank

32‧‧‧ housing

321‧‧‧left side

34‧‧‧ instrument cluster

36‧‧‧ grip group

40‧‧‧ rail bracket

41‧‧‧ Arm

42‧‧‧rails

45‧‧‧Back end rail

46‧‧‧ front end pads

47‧‧‧Back end mats

48‧‧ ‧ baffle

52‧‧‧Drive rod

54‧‧‧

55‧‧‧ shaft tube

56‧‧‧ pedal

62‧‧‧ swing arm

63‧‧‧ grip

64‧‧‧ linkage

A1‧‧‧ first horizontal axis

A3‧‧‧ third horizontal axis

A4‧‧‧ fourth horizontal axis

A5‧‧‧ fifth horizontal axis

Claims (10)

An elliptical exercise machine capable of folding, comprising: a main frame body having a base, the base has a front end and a rear end; a left crank and a right crank are pivoted according to a first horizontal axis a flywheel is pivotally mounted on the main frame body according to a second horizontal axis, and is coupled with the two cranks; the second horizontal axis is closer to the rear end of the base than the first horizontal axis; a shell The body is disposed on the main frame body and covers the flywheel, and has a left side surface and a right side surface; a rail frame having two left and right arms fixed to each other and two left and right guide rails, each of the foregoing arms having a The front ends of the two arms are respectively located outside the left and right sides of the housing, and are pivotally disposed on the base of the main frame according to a third horizontal axis, so that the rail frame can be opposite to the main frame. The body is deflected between an angle of use and a folding angle; the third horizontal axis is between the front and rear ends of the base, and is located at the bottom side of the flywheel, when the rail frame is at the folding angle Part of the aforementioned housing Between the two left and right arms; the guide rail is located at the rear side of the arm, each of the guide rails has an integral continuous basic section and an extended section, and the extension section is farther from the foregoing arm than the basic section; The mechanism can lock the rail frame at the folding angle; a left driving rod and a right driving rod, each of the driving rods has a front end and a rear end, and the front ends of the left and right driving rods are respectively pivotally connected to the foregoing The left and right cranks are respectively arranged on the left and right rails so as to be slidable along the rails and can be deflected relative to each other; when the rail rack is located at the aforementioned use angle, Corresponding to the circular movement of the front end of the driving rod along a circular trajectory centered on the first horizontal axis, the rear end of the driving rod reciprocates between the front and rear ends of the basic section of the guide rail When the rail frame is located at the folding angle, the rear ends of the two driving rods are respectively held on the two rails, and at least one rear end of the driving rod is located at the corresponding guide And the left pedal and the right pedal are respectively coupled to the left and right second movable rods in a manner capable of driving each other, so that when the rail frame is located at the use angle, corresponding to the front end of the driving rod The circular motion and the rear end reciprocate, and the pedal moves along a closed trajectory; Wherein, when the rail frame is located at the use angle, the elliptical exercise machine is in a state of being usable for movement; and when the rail frame is located at the folding angle, the elliptical exercise machine is in a folded state. The collapsible elliptical exercise machine of claim 1, wherein: the position of the third horizontal axis in the front-rear axis is between the center of the circular track and the trailing edge of the circumference, and is on the side. In view of the above, the arms of the aforementioned rail frame are always located outside the aforementioned circular path. The collapsible elliptical exercise machine of claim 1, wherein: the distance from the pivot axis of the driving rod relative to the crank to the yaw axis of the driving rod relative to the guide rail is defined as a driving rod The length, the distance from the pivoting axis of the aforementioned driving rod with respect to the pivot axis of the crank to the first horizontal axis is defined as the crank length, and the length of the driving rod is less than 4 times the length of the crank. The collapsible elliptical exercise machine of claim 1, further comprising: a left link and a right link, each of the links has a front end and a rear end, and the front end of each of the links The rear end of each of the connecting rods is fixed to the front and rear of the main frame body, and the rear end of each of the connecting rods is fixed to the corresponding pedal, and the connecting rod and the corresponding driving rod can be arranged in front of the driving rod. The fourth horizontal axis between the two ends is oppositely deflected; when the rail frame is located at the use angle, each of the pedals is located behind the corresponding fourth horizontal axis, and the rear end of each of the pedals is corresponding to the corresponding driving rod The back end is located further behind. The collapsible elliptical exercise machine of claim 1, wherein: an automatic pressing device is disposed between the front end of the rail frame and the flywheel, and the automatic pressing device has a guide rail frame. a pressing portion; when the rail frame is located at the use angle, the pressing portion is correspondingly located at a position that does not contact the flywheel; and when the rail frame is deflected by the use angle to the folding angle, the pressing portion correspondingly shifts To be able to withstand the position of the aforementioned flywheel. The collapsible elliptical exercise machine of claim 5, wherein: the automatic pressing device comprises a pushing member, a displacement member and an elastic member; the pushing member is disposed at the front end of the rail frame. And the displacement member is disposed with respect to the main frame body according to the third horizontal axis; the displacement member is provided with the pressing portion, and the displacement member is capable of approaching or leaving the circumferential surface of the flywheel with the pressing portion. The method is movably disposed on the main frame body; the elastic member is disposed between the displacement member and the main frame body, and an elastic restoring force applies a phase to the displacement member For the force of the main frame body, the direction of action of the force corresponds to displacement of the displacement member toward the circumferential surface of the flywheel from the pressing portion; when the rail frame is deflected from the use angle to the folding angle, The pushing member pushes the displacement member to a position where the pressing portion abuts against the circumferential surface of the flywheel, and the elastic member is elastically deformed. The collapsible elliptical exercise machine of claim 6, wherein: the pushing member is provided with a curved surface, and the curved surface is matched with the deflection angle of the rail frame by a relatively short distance from the third horizontal axis. The diameter portion extends to a long diameter portion that is relatively far from the third horizontal axis; corresponding to the rail frame being deflected in a direction closer to the folding angle than the direction of the use angle, the pushing member may be The portion of the curved surface that is closer to the short-diameter portion is pushed against the displacement member, and is deflected so as to be pushed against the displacement member at a portion of the curved surface that is closer to the long-diameter portion. The collapsible elliptical exercise machine of claim 5, wherein: the automatic pressing device comprises a curved surface, wherein the curved surface is disposed at a front end of the rail frame, and the third rail is formed according to the rail frame. The shaft is deflected relative to the main frame body, and the curved surface is matched with the deflection angle of the rail frame by a short diameter portion that is relatively close to the third horizontal axis to a long diameter portion that is relatively far from the third horizontal axis. The long diameter portion forms the pressing portion; when the rail frame is at the use angle, the short diameter portion of the curved surface is located on a connecting line between the second horizontal axis and the third horizontal axis, and corresponds to the rail frame The direction closer to the use angle is deflected in a direction closer to the folding angle, and the curved surface is deflected to a portion closer to the long diameter portion by a portion closer to the short diameter portion toward the peripheral surface of the flywheel Facing the circumferential surface of the aforementioned flywheel. The collapsible elliptical exercise machine of claim 1, further comprising: a pneumatic support rod, wherein the first end of the pneumatic support rod is pivotally connected to the third horizontal axis of the base of the main frame body The second end of the air pressure support rod is pivotally connected to the rail frame. When the rail frame is at the use angle, the first end of the air pressure support rod is located at the second end of the air pressure support rod and the third cross. Above the connecting line of the shaft. The collapsible elliptical exercise machine of claim 1, wherein: the telescopic rod further comprises a telescopic rod, wherein the telescopic rod comprises an outer tube and an inner rod which are coaxially sleeved and can slide relative to each other along the long axis. One end of the telescopic rod is pivotally connected behind the third horizontal axis of the base of the main frame body, and the other end of the supporting device is pivotally connected to the rail frame; the outer tube and the inner tube The locking mechanism is disposed between the rods, and the locking mechanism can lock the relative relationship between the outer tube and the inner rod when the rail frame is at the folding angle.