Foldable exercise bike

Abstract

A foldable exercise bike includes a cross configuration formed by a main frame with a treading-driven rotation mechanism at bottom and a seat at top and a second frame with a pivoting portion pivoted to a handle. The main frame has a first-positioning device, and one end of the first-positioning device is selectively fixed on the second frame, so that the main frame can be fixed with the second frame. The second frame has a second-positioning device, and one end of the second-positioning device is selectively fixed on the handle, so that the second frame can be fixed with the handle. A resistance device is between the second frame and handle. The length of the resistance device can be changed when the handle is swung relative to the second frame, thereby generating a resistance force opposing to the swing motion of the handle.

Claims

1. A foldable exercise bike, comprising: a main frame, a bottom thereof having a rotation mechanism, and the rotation mechanism being driven by treading, and a top of the main frame having a seat; a second frame pivoted to the main frame to form a cross configuration, wherein the main frame has a first positioning device, and one end of the first positioning device is selectively fixed on the second frame, so that the main frame and the second frame are fixed with each other, a top of the second frame has a pivoting portion; a handle, a bottom thereof being pivoted to the pivoting portion of the second frame, so that the handle is swingable relative to the second frame, wherein the second frame has a second positioning device, and one end of the second positioning device is selectively fixed on the handle, so that the second frame and the handle are fixed with each other and a swing motion of the handle is limited; a resistance device, one of two ends thereof being connected to the second frame, and the other end thereof being connected to the handle, wherein a length of the resistance device is changed when the handle is swung relative to the second frame, and the resistance device generates a resistance force opposing to the swing motion of the handle.

2. The foldable exercise bike according to claim 1, wherein the first positioning device comprises a connection bar pivoted to the main frame and a positioning holder fixed on the second frame, the connection bar is inserted into the positioning holder (22), the connection bar has a plurality of positioning holes, the positioning holder has a pin hole, one of the positioning holes of the connection bar is adapted to correspond to the pin hole, and a pin is inserted into the pin hole and the positioning hole for positioning.

3. The foldable exercise bike according to claim 1, wherein the second frame has a first connection holder for connecting to the resistance device, and the handle has a second connection holder for connecting to the resistance device, the first connection holder or the second connection holder has a plurality of connection ports for connecting to the resistance device, so that the resistance device is adapted to provide different initial resistance forces by combinations of different connection positions.

4. The foldable exercise bike according to claim 1, wherein the resistance device is a damper-type hydraulic cylinder.

5. The foldable exercise bike according to claim 1, wherein the resistance device is an adjustable damper.

6. The foldable exercise bike according to claim 1, wherein the top and a bottom of the second frame respectively have bent portions bent toward the main frame.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 illustrates a perspective view of an exemplary embodiment of the present invention;

(2) FIG. 2 illustrates an exploded view of the exemplary embodiment of the present invention;

(3) FIG. 3 illustrates a schematic view showing that the foldable exercise bike is in a folded condition;

(4) FIG. 4 illustrates a schematic view of another embodiment of a resistance device of the present invention; and

(5) FIGS. 5 and 6 illustrate operational views of the exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) Please refer to FIGS. 1 and 2, illustrating a foldable exercise bike of an exemplary embodiment of the present invention. The foldable exercise bike comprises a main frame (1) and a second frame (2) pivoted to the main frame (1) to form a cross configuration. The second frame (2) has two separated bars (21), and the main frame (1) is inserted between the two bars (21). A top of the main frame (1) has a seat (11). A bottom of the main frame (1) has a rotation mechanism (12), and the rotation mechanism (12) is driven by treading. The operation of the rotation mechanism (12) is conventional and detailed explanations about the operation are omitted. The rotation mechanism (12) may be used along with a device for providing resistance to increase the resistance force for rotating the rotation mechanism (12), so that the training effect for the users can be improved.

(7) Further, the main frame (1) has a first positioning device, and one end of the first positioning device is selectively fixed on the second frame (2), so that when the foldable exercise bike is unfolded, the main frame (1) and the second frame (2) can be fixed with each other. In this embodiment, the first positioning device has a connection bar (13) and a positioning holder (22). One end of the connection bar (13) is pivoted to the main frame (1), and the positioning holder (22) is fixed on the second frame (2), and the connection bar (13) is inserted into the positioning holder (22). The connection bar (13) has a plurality of positioning holes (131), and the positioning holder (22) has a first pin hole (221). When the angle between the main frame (1) and the second frame (2) is changed, the connection bar (13) is inserted into the positioning holder (22) with different extents. One of the positioning holes (131) of the connection bar (13) is adapted to correspond to the first pin hole (221), and a first pin (222) is inserted into the positioning hole (131) and the first pin hole (221) at the same time, so that the main frame (1) and the second frame (2) can be fixed with each other.

(8) Accordingly, when the first pin (222) is detached from the first pin hole (221) and the positioning hole (113), the main frame (1) can be swung relative to the second frame (2), so that the foldable exercise bike can be in a folded condition as shown in FIG. 3. Therefore, the size of the bike can be reduced for storage. In this embodiment, the top and a bottom of the second frame (2) respectively have bent portions (23) bent toward the main frame (1), so that the main frame (1) and the second frame (2) can be closely attached to each other when the main frame (1) is folded toward the second frame (2). Hence, in the folded condition, the size of the bike can be greatly reduced, as compared with its unfolded condition.

(9) Conversely, a top of the second frame (2) has a pivoting portion (24), and a bottom of a handle (3) is pivoted to the pivoting portion (24) of the second frame (2), so that the handle (3) is swingable relative to the second frame (2). Further, the second frame (2) has a stopping plate (25) for limiting the swing motion of the handle (3). The second frame (2) has a second positioning device. One end of the second positioning device is selectively fixed on the handle (3), so that the second frame (2) and the handle (3) are fixed with each other, and the swing motion of the handle (3) is limited. In this embodiment, the second frame (2) and the handle (3) respectively have second pin holes (26, 31) at non-pivoting portions. When the second pin hole (26) of the second frame (2) and the second pin hole (31) of the handle (3) are aligned with each other, a second pin (27) is inserted into the second pin holes (26, 31), so that the handle (3) can be fixed with the second frame (2).

(10) In addition, the resistance force for the swing motion of the handle (3) can be increased by using a resistance device (4). In this embodiment, the resistance device (4) is a damper-type hydraulic cylinder. One of two ends of the resistance device (4) is connected to the second frame (2), and the other end of the resistance device (4) is connected to the handle (3), and a length of the resistance device (4) is changed when the handle (3) is swung relative to the second frame (2), and the resistance device (4) generates a resistance force opposing to the swing motion of the handle (3). Furthermore, the second frame (2) has a first connection holder (28), and the handle (3) has a second connection holder (32). The first connection holder (28) or the second connection holder (32) has a plurality of connection ports for connecting to the resistance device (4). In this embodiment, the first connection holder (28) has one connection port (281), and the second connection holder (32) has three connection ports (321). One of two ends of the resistance device (4) is connected to the connection port (281) of the first connection holder (28), and the other end of the resistance device (4) is selectively connected to one of the connecting ports (321) of the second connection holder (32). The initial length of the resistance device (4) is different when different connection ports (281, 321) are selected. Therefore, the bike can provide different initial resistance forces for the users.

(11) Another embodiment of the resistance device (4) is provided, as shown in FIG. 4. In this embodiment, the first connection holder (28) and the second connection holder (32) respectively have one connection port (281, 321), and two ends of the resistance device (4) are respectively connected to the connection ports (281, 321). In this embodiment, the resistance device (4) is an adjustable damper. The resistance device (4) has an adjustable head (41), and the initial resistance force of the resistance device (4) relative to the handle (3) can be adjusted by rotating the adjustable head (41).

(12) Accordingly, when the user sits on the seat (11) to do exercise with the present invention, the user not only can tread the rotation mechanism (12) repeatedly to train his/her limbs but also pull the handle (3) backwardly and push the handle (3) forwardly, as shown in FIGS. 5 and 6, so that the second frame (2) is pivotally moved relative to the handle (3). Hence, the user can train his/her arms and back muscle groups along with the lower limbs. Therefore, the training of the upper limbs can be achieved along with the training of the lower limbs, so that the user can train his/her body in every aspect, thereby allowing the present invention to have a wide application.