Height-adjustable bicycle trainer

Abstract

To provide a bicycle trainer with a height adjusting member for a user to be able to exercise anywhere and anytime easily.SOLUTION: A bicycle trainer is provided, including: a base having a base portion and a standing portion; a supporting frame rotationally pivoted on the standing portion of the base around a first axle; a cassette module mounted on the supporting frame and having multiple sprockets; and a flywheel module mounted on the supporting frame. A height adjusting member includes the standing portion, the supporting frame and a fixing element. The fixing element is placed in or between the standing portion and the supporting frame for keeping the supporting frame at a predetermined angle with respect to the standing portion.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to an exercise device that is easy to carry and compact, and in particular to a bicycle trainer with height adjustment members that allows users to easily exercise anywhere and at any time. [Background technology]

[0002] The vertical height of most conventional trainers cannot be adjusted or easily adjusted for bicycles with different wheel diameters, such as 26-inch or 29-inch wheels.

[0003] U.S. Patent Nos. 9,999,818 and 10,933,290 disclose a bicycle trainer that includes a height-adjustable bracket 150. As shown in FIG. 1, the height-adjustable bracket 150 is coupled between a main frame member 128 and a mid-leg 112. The mid-leg 112 has a plurality of openings 152 along its length for receiving pins 154. The pins 154 extend through the openings in the opposing member and through one of the openings 152 in the mid-leg 112. By securing the height-adjustable bracket 150 to one of the openings 152 in the mid-leg 112, a user can raise or lower the main frame member 128 and thereby raise or lower the axle to the location where the bicycle is to be mounted.

[0004] However, as shown in Figure 1, the bicycle trainer is not compact enough, making it difficult for a user to apply a lifting force by manipulating the height adjustment bracket 150 with one hand while aligning the pin 154 with the corresponding opening in the middle leg 112 and the height adjustment bracket 150 with the other hand. Furthermore, if the user attempts to secure the height adjustment bracket 150 to another opening 152, the user's fingers may be too close to the sharp corner formed by the height adjustment bracket 150 and the middle leg 112, which could result in injury to the user's fingers.

[0005] Therefore, there is a great need for a new bicycle trainer with height adjustment members, and in particular a new bicycle trainer that has a height adjustment member and a cassette that supports the axle, allowing the user to easily mount a bicycle with the rear wheel removed. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] U.S. Patent No. 9,999,818 [Patent Document 2] U.S. Patent No. 10,933,290 Summary of the Invention [Problem to be solved by the invention]

[0007] In view of the shortcomings of conventional bicycle trainers, the present invention provides a bicycle trainer that is safer, more portable, and has a compact configuration. The bicycle trainer has various features including height adjustment, tension adjustment, magnetic poles (optional), charging, and communication with, for example, a smart device or tablet, as well as other features and advantages. [Means for solving the problem]

[0008] In one embodiment, the present invention provides a bicycle trainer including a base having a base and an upright portion, at least one leg pivotally mounted to the base, a support frame pivotally mounted to the upright portion of the base so as to rotate about a first axis, a cassette module attached to the support frame and having a plurality of sprockets, a flywheel module attached to the support frame and coaxially mounted with the cassette module about a second axis, and a height adjustment member including the upright portion, the support frame, and a fixing member, the fixing member being positioned within or between the upright portion and the support frame so as to hold the support frame at a predetermined angle relative to the upright portion.

[0009] Preferably, the fixing member is a positioning pin, the standing portion has at least one positioning hole, the support frame has a plurality of positioning holes, and the at least one positioning hole and any one of the plurality of positioning holes are arranged to receive the positioning pin and hold the support frame at a predetermined angle relative to the standing portion.

[0010] Preferably, the bicycle trainer further includes a knob on one end of the locating pin.

[0011] Preferably, the standing portion has one alignment hole on one side of the standing portion and another alignment hole on the other side of the standing portion, and the alignment hole and any one of the plurality of positioning holes are arranged to accommodate the positioning pin and hold the support frame at a predetermined angle relative to the standing portion.

[0012] Preferably, the fixing member is a pawl pivotally mounted on the support frame, the standing portion has a ratchet gear, and the support frame has a spring coupled to the pawl, the pawl being arranged to engage with the teeth of the ratchet gear to hold the support frame at a predetermined angle relative to the standing portion.

[0013] Preferably, the bicycle trainer further includes a handle, the handle being located at or near the top of the bicycle trainer when the bicycle trainer is in the folded mode.

[0014] Preferably, the bicycle trainer further includes a power supply housed in the base and configured to power electrical components in the bicycle trainer.

[0015] Preferably, the flywheel module further includes a dual mode motor to simulate uphill and downhill riding conditions.

[0016] In another embodiment, the present invention provides a bicycle trainer including a base having a base and an upright portion, at least one leg pivotally mounted to the base, a support frame pivotally mounted to the upright portion of the base to rotate about a first axis, a cassette module attached to the support frame, the cassette module having a plurality of sprockets and a cassette pulley, and rotating about a second axis, a flywheel module attached to the support frame, the flywheel module having a flywheel pulley, and rotating about the first axis, a belt attached to run along the cassette pulley and the flywheel pulley, and a height adjustment member including the upright portion, the support frame, and a fixing member, the fixing member being positioned within or between the upright portion and the support frame to hold the support frame at a predetermined angle relative to the upright portion.

[0017] Preferably, the fixing member is a positioning pin, the standing portion has at least one positioning hole, the support frame has a plurality of positioning holes, and the at least one positioning hole and any one of the plurality of positioning holes are arranged to receive the positioning pin and hold the support frame at a predetermined angle relative to the standing portion.

[0018] Preferably, the bicycle trainer further includes a knob on one end of the locating pin.

[0019] Preferably, the standing portion has one of the alignment holes on one side of the standing portion and another of the alignment holes on the other side of the standing portion, and the alignment hole and any one of the plurality of positioning holes are arranged to accommodate the positioning pin and hold the support frame at a predetermined angle relative to the standing portion.

[0020] Preferably, the fixing member is a pawl pivotally mounted on the support frame, the standing portion has a ratchet gear, and the support frame has a spring coupled to the pawl, the pawl being arranged to engage with the teeth of the ratchet gear to hold the support frame at a predetermined angle relative to the standing portion.

[0021] Preferably, the bicycle trainer further includes a handle, the handle being located at or near the top of the bicycle trainer when the bicycle trainer is in the folded mode.

[0022] Preferably, the bicycle trainer further includes a power supply housed in the base and configured to power electrical components in the bicycle trainer.

[0023] Preferably, the flywheel module further includes a reluctance component for simulating uphill riding conditions.

[0024] Preferably, the base is a one-piece base.

[0025] Preferably, the bicycle trainer further includes a belt tensioning arm pivotally mounted on the first shaft, an idler pulley pivotally mounted on the belt tensioning arm, and a spring, one end of the spring being connected to one end of the belt tensioning arm and the other end of the spring being connected to a housing of the support frame, and the tension of the belt automatically increases or decreases according to the angle formed between the support frame and the standing portion.

[0026] Preferably, the flywheel pulley, the belt tension arm, the support frame and the flywheel module are jointly pivoted to rotate about the first axis.

[0027] In yet another embodiment, the present invention provides an exercise device comprising: a base having a base and an upright portion; a support frame pivotally mounted to the upright portion of the base to rotate about a first axis; a flywheel module pivotally mounted to the support frame to rotate about a second axis, the flywheel module simulating uphill and / or downhill riding conditions; and a height adjustment member including the upright portion, the support frame, and a fixing member, the fixing member disposed within or between the upright portion and the support frame to hold the support frame at a predetermined angle relative to the upright portion. [Effects of the Invention]

[0028] According to the present invention, it is possible to provide a bicycle trainer with a height adjustment member that allows the user to easily exercise at any place and at any time. [Brief explanation of the drawings]

[0029] [Figure 1] 1 is a diagram showing a conventional bicycle trainer with a height adjustment bracket. [Figure 2] FIG. 1 is a front perspective view showing the bicycle trainer of the first embodiment in a folded mode. [Figure 3] FIG. 1 is a front perspective view showing the bicycle trainer of the first embodiment in the deployed mode. [Figure 4] FIG. 1 is a rear perspective view showing the bicycle trainer of the first embodiment in the folded mode. [Figure 5] FIG. 1 is a rear perspective view showing the bicycle trainer of the first embodiment in the deployed mode. [Figure 6] FIG. 6 is an enlarged view showing the height adjusting member of FIGS. 2 to 5. [Figure 7] 5A and 5B are diagrams showing another height adjusting member according to the first embodiment. [Figure 8] FIG. 10 is a view showing still another height adjusting member according to the first embodiment. [Figure 9] FIG. 10 is a front perspective view showing the bicycle trainer of the second embodiment in the folded mode. [Figure 10] FIG. 10 is a front perspective view showing the bicycle trainer of the second embodiment in the deployed mode. [Figure 11] FIG. 10 is a rear perspective view showing the bicycle trainer of the second embodiment in the folded mode. [Figure 12] FIG. 10 is a rear perspective view showing the bicycle trainer of the second embodiment in the deployed mode. [Figure 13] FIG. 10 is a front view showing the bicycle trainer of the second embodiment in the folding mode. [Figure 14] FIG. 10 is a front perspective view showing the bicycle trainer of the third embodiment in the folded mode. [Figure 15] FIG. 10 is a front perspective view showing the bicycle trainer of the third embodiment in the deployed mode. [Figure 16] FIG. 10 is a rear perspective view showing the bicycle trainer of the third embodiment in the folded mode. [Figure 17] FIG. 10 is a rear perspective view showing the bicycle trainer of the third embodiment in the deployed mode. [Figure 18] FIG. 10 is a front perspective view showing a bicycle trainer of the fourth embodiment in a folded mode. [Figure 19] FIG. 10 is a front perspective view showing a bicycle trainer of the fourth embodiment in the deployed mode. [Figure 20] FIG. 10 is a rear perspective view showing the bicycle trainer of the fourth embodiment in the folded mode. [Figure 21] FIG. 10 is a rear perspective view showing the bicycle trainer of the fourth embodiment in the deployed mode. DETAILED DESCRIPTION OF THE INVENTION

[0030] In order to facilitate a thorough understanding of the technical concept of the present invention by those skilled in the art, several embodiments will be illustrated below, and the configurations or arrangements of these embodiments will be specifically described. The configurations or arrangements of these embodiments should be considered merely as examples and not as limiting. In the following embodiments, for ease of explanation, identical or substantially identical components may be denoted by the same reference numerals. Those skilled in the art will understand that the present disclosure may be applied to other processes or devices to achieve similar purposes and / or obtain similar advantages to those of the embodiments described in the present disclosure. Those skilled in the art will be able to make various changes, modifications, and substitutions without departing from the technical concept and spirit of the present invention. Embodiments of the present invention may be more clearly understood by reference to the accompanying drawings. In accordance with standard industry practice, features of the embodiments may not be drawn to scale. In fact, for ease of illustration, the dimensions of the features of the embodiments may be arbitrarily increased or decreased.

[0031] This disclosure claims priority to U.S. Provisional Application No. 63 / 313,745, filed February 25, 2022, the entire contents of which are incorporated herein by reference.

[0032] In some drawings, e.g., Figures 3, 5, 8, 13, 16, 17, 19, and 21, the outlines of some elements are shown even though they are obscured by other elements in order to show the relative positions of the elements with respect to other elements.

[0033] [First embodiment] The first embodiment will be described with reference to FIGS. FIG. 2 is a front perspective view of the bicycle trainer (100) of the first embodiment in the folded mode. FIG. 3 is a front perspective view of the bicycle trainer (100) of the first embodiment in the unfolded mode. FIG. 4 is a rear perspective view of the bicycle trainer (100) of the first embodiment in the folded mode. FIG. 5 is a rear perspective view of the bicycle trainer (100) of the first embodiment in the unfolded mode. FIG. 6 is an enlarged view of the height adjustment member of FIGS. 2 to 5. FIG. 7 is a view showing another height adjustment member according to the first embodiment. FIG. 8 is a view showing yet another height adjustment member according to the first embodiment.

[0034] First, referring to Figures 2 to 5, the bicycle trainer (100) includes a cassette module (1), a flywheel module (2), a handle (3), a first shaft (4), a positioning pin (51) having a knob (5), a base (6), two legs (7), a support frame (8), and two feet (9). The flywheel module (2) includes a motor and / or a generator. The base (6) includes a base portion (62) and an upright portion (63). The legs (7) are pivotally mounted to the base (6), and each of the two feet (9) is provided at one end of each leg portion (7) to increase friction with the ground. The cassette module (1) has multiple sprockets that provide the user with multiple gear ratios. The cassette module 1 and the flywheel module 2 are mounted on a support frame 8 and are coaxially arranged around a second axis 10, which includes a set of members for supporting the cassette module 1, the flywheel module 2, bearings, and a hub (not shown). The support frame 8 is pivotally mounted on a raised portion 63 of the base 6 so as to rotate about the first axis 4. A power source (motor), such as battery cells or battery packs, housed in the base 6, is arranged to power electrical components or devices in the bicycle trainer 100, such as an LCD display, a control system that drives the motor with a pre-coding program, or a wireless device. The power source may also be used to power the user's electronic devices, such as a smartphone, mobile phone, or speaker. The battery cells or battery packs may be charged by the flywheel module 2, which acts as a generator during riding.

[0035] Near the ends of the support frame 8 are a number of holes for receiving locating pins 51 with knobs 5. When the bicycle trainer 100 is in the folded mode, the locating pin 51 with knob 5 is secured to one of the holes in the support frame 8, holding the support frame 8 in a low position. This makes the bicycle trainer 100 compact and easy to carry by grasping the handle 3 located at or near the top of the bicycle trainer 100.

[0036] When a user wants to exercise, they can easily open and fold the legs (7) to a desired angle, such as 45 degrees, 60 degrees, 90 degrees, 135 degrees, or any other desired angle relative to the base (6). The user can also easily release the positioning pins (51) from the support frame (8) and the uprights (63) of the base (6) by grasping the knobs (5). Then, the user can easily apply a lifting force to the support frame (8) using the handles (3) to rotate the support frame (8) around the first axis (4) to a desired angle. Furthermore, the user can easily insert the positioning pins (51) into the uprights (63) of the support frame (8) and the base (6) to hold the support frame (8) at a desired height. After opening and folding the legs (7) and lifting the support frame (8) using the adjustment members, the bicycle trainer (100) is in the unfolded mode. The user can then attach the bicycle, with the rear wheel removed, to the bicycle trainer (100) via the cassette module (1).

[0037] Figure 6 shows the height adjustment member of the bicycle trainer (100). Using the height adjustment member, a user can lift the support frame (8) by rotating the support frame (8) around the first axis (4) using the handle (3). The height adjustment member can be used to adjust the angle between the support frame (8) and the upright portion (63) of the base (6), thereby changing the height of the second axis (10) accordingly.

[0038] The height adjustment member 6 shown in FIG. 6 includes a support frame 8, a base 63 (standing portion 63), a positioning pin 51 with a knob 5, and a screw-fastening unit (optional), not shown. The support frame 8 has a plurality of positioning holes 81 located near the edge of the support frame 8. The base 63 (standing portion 63) has two alignment holes 61 located on both sides of the standing portion 63. The positioning pin 51 extends from a knob 5, such as a star-shaped knob, a wing-shaped knob, or a ball-shaped knob with a threaded rod, and the standing portion 63 may be clamped by a female screw-fastening unit, such as a star nut, a wing nut, or a ball-shaped nut. That is, the positioning pin 51 passes through the positioning hole 61 on one side of the standing portion 63, one of the positioning holes 81, and the positioning hole 61 on the other side of the standing portion 63, and is screwed in with a female screw unit, thereby supporting the support frame 8 at a predetermined height, i.e., holding the support frame 8 at a predetermined angle relative to the standing portion 63. Alternatively, the positioning pin 51 can pass through the positioning hole 61 on one side of the standing portion 63 and one of the positioning holes 81, and then screwed into the positioning hole 61 on the other side of the standing portion 63. In this case, the positioning hole 61 on the other side of the standing portion 63 has a female thread formed therein. In another embodiment, the alignment holes (61) are each arranged on both sides of the upright portion (63), and one positioning hole (81) is arranged in the support frame (8).

[0039] The positioning holes 81 are formed near the ends of the support frame 8 and are arranged in an arc or circle shape substantially along the center of the first shaft 4. By selectively inserting the positioning pin 51 into any of the positioning holes 81, the angle of the upright or pivotal movement of the support frame 8 changes accordingly. That is, the mounting heights of the cassette module 1, the flywheel module 2, and the support frame 8 change in accordance with the angle adjustment.

[0040] To improve the mechanical strength, more alignment holes 61 may be provided in the upright portion 63 for other positioning pins 51 to pass through.

[0041] 7 and 8 show two variations of the height adjustment member of the bicycle trainer 100. In both variations, the user can lift the support frame 8 by rotating the support frame 8 around the first axis 4 using the handle 3.

[0042] The height adjustment member shown in Figure 7 includes a support frame (8), a standing portion (63) of the base (6), a ratchet part (54), a pawl (55), and a spring (56). The pawl (55) holds the support frame (8) at a predetermined angle relative to the standing portion (63) by engaging with the teeth of the ratchet gear (54). The pawl (55) can change the angle of standing or rotation of the support frame (8) accordingly by selectively engaging different teeth or ends of the ratchet gear (54).

[0043] 7, the height adjustment member shown in FIG. 8 includes a support frame (8), a standing portion (63) of the base (6), a ratchet gear (54), a pawl (55), a clutch (57), and a button (58). The ratchet gear (54) is fixed to or formed on the support frame (8), and the pawl (55) is pivotally mounted on the standing portion (63). The clutch (57) can easily release the pawl (55) from meshing with the ratchet gear (54) by resisting the force applied to the pawl (55) by pressing the button (58) from the ratchet gear (54), thereby allowing the angle of standing or rotation of the support frame (8) to be changed accordingly.

[0044] In addition to the above configuration, any fixing or engagement mechanism that can adjust the angle between the support frame (8) and the standing portion (63) can be applied to the bicycle trainer (100) and is within the scope of this embodiment.

[0045] Returning to Figures 2-5, the flywheel module (2) may include a dual-mode motor that can simulate uphill and downhill riding situations. The height adjustment members shown in Figures 6, 7, or 8 allow the user to easily adjust the height of the bicycle trainer (100), thereby creating incline scenarios for riding uphill and downhill.

[0046] [Second embodiment] The second embodiment will be described with reference to Figures 9 to 12. Figure 9 is a front perspective view showing the bicycle trainer (200) of the second embodiment in the folded mode. Figure 10 is a front perspective view showing the bicycle trainer (200) of the second embodiment in the unfolded mode. Figure 11 is a rear perspective view showing the bicycle trainer (200) of the second embodiment in the folded mode. Figure 12 is a rear perspective view showing the bicycle trainer (200) of the second embodiment in the unfolded mode. Members in the second embodiment that are the same or substantially the same as those in the first embodiment are designated by the same reference numerals.

[0047] The bicycle trainer (200) includes a cassette module (1), a flywheel module (2), a handle (3), a first shaft (4), a knob (5) with a positioning pin (not shown), a base (6), two legs (7), a support frame (8), and two feet (9). The base (6) includes a base portion (62) and an upright portion (63). The legs (7) are pivotally mounted to the base (6), and two feet (9) are provided at one end of each leg (7) to increase friction with the ground. The cassette module (1) has multiple sprockets that provide multiple gear ratios for the user. Both the cassette module (1) and the flywheel module (2) are attached to the support frame (8), but each rotates around a different axis (4, 10). As in the first embodiment, the support frame (8) is pivoted to rotate around the first axis (4).

[0048] Also, similar to the first embodiment, the height adjustment member shown in Figures 6, 7 and 8 can be applied to the second embodiment to adjust the angle between the support frame (8) and the upright portion (63) of the base (6) to change the height of the second axis (10) accordingly.

[0049] When the bicycle trainer 200 is in the folded mode, the legs 7 and support frame 8 are held in a low position, making the bicycle trainer 200 compact and easy to transport using the handle 3 located at or near the top of the bicycle trainer 200.

[0050] When a user wants to exercise, they can easily open and fold the legs (7) to a desired angle, for example, 45 degrees, 60 degrees, 90 degrees, 100 degrees, or any other desired angle relative to the base (6). Limited by the structure of the base (6) of the second embodiment, each leg (7) can be unfolded to an angle slightly greater than 90 degrees. After unfolding and folding the legs (7) and lifting the support frame (8) using the height adjustment members shown in Figures 6, 7, and 8, the bicycle trainer (200) enters unfolded mode. Then, the user can attach a bicycle, with the rear wheel removed, to the bicycle trainer (200) via the cassette module (1).

[0051] Figure 13 is a front view of the second embodiment of the bicycle trainer (200) in the folded mode. As shown in Figure 13, the bicycle trainer (200) further includes a tension adjustment mechanism including a belt tensioning arm (13) pivoted coaxially about the first axis (4), an idler pulley (14) pivoted on the belt tensioning arm (13), and a spring (15). One end of the spring (15) is connected to one end of the belt tensioning arm (13), and the other end of the spring (15) is connected to the housing of the support frame (8). The belt tensioning arm (13) is pulled (or, in another configuration, pushed) clockwise or counterclockwise by the spring (15), thereby urging the belt (19) from the idler pulley (14). That is, the tension of the belt 19 increases or decreases depending on the height adjustment of the second shaft 10, and the appropriate tension is automatically maintained for the belt 19 depending on the angle formed by the support frame 8 and the upright portion 63. Alternatively, the user can manually adjust the degree of stretch of the spring 15 via the nut 20. The belt 19 is attached to the cassette module pulley 11, the idler pulley 14, and the flywheel pulley 16. Each end of the spring 15 is fixed to the belt tension arm 13 and the support frame 8 via a kit set including hooks, bolts, nuts, or other adjustable kits. With the above configuration, the flywheel pulley 16, the belt tension arm 13, the support frame 8, and the flywheel module 2 can be pivoted together to rotate around the first shaft 4.

[0052] The flywheel module 2 may include a reluctance component that provides a braking force to the user to simulate riding conditions uphill. The reluctance component may be an electromagnet that provides a variable resistance to the user. Variable resistance can be achieved by controlling the amount of current flowing through a magnet with two, four, six, or twelve poles, including an iron core and a coil formed by winding wire. As the current flowing through the magnet increases, the magnetic force becomes stronger, and the resistance of the flywheel module 2 increases.

[0053] The height adjustment members shown in Figures 6, 7 and 8 allow the user to easily adjust the height of the bicycle trainer (200), thereby creating incline scenarios such as riding uphill.

[0054] The bicycle trainer 200 may also house a power source, such as a battery cell or battery pack, in the base 6. The power source may be used to power electrical components or devices in the bicycle trainer 200, such as an LCD display, a control system that drives the motor with a pre-coding program, or a wireless device. Furthermore, the power source may be used to power the user's electronic devices, such as a smartphone, mobile phone, or speaker. The battery cell or battery pack may be charged by the flywheel module 2, which operates in a power generation mode during riding.

[0055] [Third embodiment] The third embodiment will be described with reference to Figures 14 to 17. Figure 14 is a front perspective view of a bicycle trainer (300) of the third embodiment in the folded mode. Figure 15 is a front perspective view of a bicycle trainer (300) of the third embodiment in the unfolded mode. Figure 16 is a rear perspective view of a bicycle trainer (300) of the third embodiment in the folded mode. Figure 17 is a rear perspective view of a bicycle trainer (300) of the third embodiment in the unfolded mode. Members in the third embodiment that are the same or substantially the same as those in the first or second embodiment are designated by the same reference numerals.

[0056] The bicycle trainer (300) includes a cassette module (1), a flywheel module (2), a handle (3), a first shaft (4), a positioning pin (not shown) with a knob (5), a base (6), two legs (7), a support frame (8), and two feet (9). The base (6) includes a base portion (62) and an upright portion (63). The configuration of the third embodiment differs from that of the second embodiment mainly in that the upright portion (63) of the base (6) in the third embodiment has only one upright plate for supporting the support frame (8), rather than the two upright plates (or both sides) in the second embodiment shown in Figures 9 to 13. Therefore, redundant explanations of components that are the same as those in the second embodiment will be omitted.

[0057] [Fourth embodiment] The fourth embodiment will be described with reference to Figures 18 to 21. Figure 18 is a front perspective view of a bicycle trainer (400) of the fourth embodiment in the folded mode. Figure 19 is a front perspective view of a bicycle trainer (400) of the fourth embodiment in the unfolded mode. Figure 20 is a rear perspective view of a bicycle trainer (400) of the fourth embodiment in the folded mode. Figure 21 is a rear perspective view of a bicycle trainer (400) of the fourth embodiment in the unfolded mode. Members in the fourth embodiment that are the same or substantially the same as those in the first, second, or third embodiments are designated by the same reference numerals.

[0058] The bicycle trainer (400) includes a cassette module (1), a flywheel module (2), a handle (3), a first axle (4), a knob (5) with a locating pin (not shown), a base (6), two legs (7), a support frame (8), and two feet (9). The base (6) in the fourth embodiment differs from the base (6) in the first, second, or third embodiments primarily in that it is manufactured from a curved tube made of a metallic or composite material. The base (6) is a one-piece unit having a base portion (62) and an upstanding portion (63). In some examples, the one-piece base (6) may have various shapes or profiles, such as a tubular, square, triangular, oval, or diamond shape. In some examples, the one-piece base (6) may be formed from multiple pieces permanently joined together, for example, by welding or adhesive.

[0059] In the fourth embodiment, the structures and constructions of the cassette module 1, flywheel module 2, height adjustment member, and tension adjustment mechanism are the same as those of the second embodiment shown in Figures 9 to 13. Therefore, redundant explanations of the components that are the same as those of the second embodiment will be omitted.

[0060] Furthermore, in the above-described embodiments, the handle (3) may be located directly above the first shaft (4), and the cassette module (1) and the second shaft (10) may be located diagonally above the first shaft (4). In some examples, the handle (3) is located directly above the first shaft (4) in both the unfolded mode and the folded mode. In some examples, the handle (3) is located directly above the first shaft (4) in either the unfolded mode or the folded mode, for example, only in the unfolded mode or only in the folded mode. When the handle (3) is located directly above the first shaft (4), it is easier for a user to apply force and the handle (3) can be operated with one hand. The handle (3) is connected to and supported by the support frame (8).

[0061] By rotating the handle 3 around the first shaft 4 to rotate the support frame 8, the height of the cassette module 1 and the second shaft 10 can be changed accordingly, for example, raised or lowered. This allows a user to easily adjust the height of the cassette module 1 and the second shaft 10, and thereby attach a bicycle with its rear wheel removed to the bicycle trainer 100 via the cassette module 1. For example, while adjusting the height of the cassette module 1 and the second shaft 10 by operating the handle 3 with one hand, the user can use the other hand to hang the chain of a bicycle with its rear wheel already removed around the cassette module 1 and adjust it to the desired height.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the technical idea and spirit of the present invention are also included within the scope of the present invention.

[0063] For example, the height adjustment member described in the above embodiment can be applied to any exercise device, not just a bicycle trainer including, for example, a base having a base and an upright portion, a support frame pivotally mounted on the upright portion of the base so as to rotate around a first axis, a flywheel module pivotally mounted on the support frame so as to rotate around a second axis and simulating uphill and / or downhill riding conditions, the upright portion, the support frame, and a fixing member, the fixing member being positioned within or between the upright portion and the support frame so as to hold the support frame at a predetermined angle relative to the upright portion. [Explanation of symbols]

[0064] 100, 200, 300, 400 Bicycle Trainer 1 Cassette Module 2 Flywheel Module 3 Handle 4. First axis 5 Knob 6. Base 7 Legs 8 Support Frame 9 feet 10 Second Axis 11 Cassette pulley 13 Belt tension arm 14 Idler pulley 15 springs 16 Flywheel pulley 19 Belt 20 nuts 51 Locating pin 54 Ratchet Gear 55th claw 56 Spring 57 Clutch 58 Buttons 6. Base 61 Alignment holes 62 Base 63 Standing part 64 Power supply 81 Positioning hole 112 Middle leg 128 Main frame member 150 Height Adjustment Bracket 152 Aperture 154 pins

Claims

1. a base (6) having a base portion (62) and an upstanding portion (63); At least one leg (7) pivotally mounted on the base (6); a support frame (8) pivotally mounted on the upright portion (63) of the base (6) so as to rotate about a first axis (4); a cassette module (1) attached to the support frame (8), having a plurality of sprockets and a cassette pulley (11), and rotating around a second axis (10); a flywheel module (2) attached to the support frame (8), having a flywheel pulley (16), and rotating about the first axis (4); a belt (19) attached along the cassette pulley (11) and the flywheel pulley (16); A height adjustment member including the standing portion (63), the support frame (8), and a fixing member, The fixing member includes a height adjusting member disposed within or between the standing portion (63) and the support frame (8) so as to hold the support frame (8) at a predetermined angle relative to the standing portion (63); Bicycle trainers (200, 300, 400) including:

2. 2. A bicycle trainer (200, 300, 400) as described in claim 1, wherein the fixing member is a positioning pin (51), the upright portion (63) has at least one alignment hole (61), the support frame (8) has a plurality of positioning holes (81), and any one of the at least one alignment hole (61) and the plurality of positioning holes (81) is arranged to receive the positioning pin (51) and hold the support frame (8) at a predetermined angle relative to the upright portion (63).

3. 3. The bicycle trainer (200, 300, 400) of claim 2, wherein the bicycle trainer (300) further comprises a knob (5) at one end of the locating pin (51).

4. A bicycle trainer (200, 400) as described in claim 2, wherein the standing portion (63) has one of the alignment holes (61) on one side of the standing portion (63) and further has the other alignment hole (61) on the other side of the standing portion (63), and the alignment hole (61) and any one of the multiple positioning holes (81) are arranged to receive the positioning pin (51) and hold the support frame (8) at a predetermined angle relative to the standing portion (63).

5. 2. A bicycle trainer (200, 300, 400) as claimed in claim 1, wherein the fixing member is a pawl (55) pivotally mounted on the support frame (8), the upright portion (63) has a ratchet gear (54), and the support frame (8) has a spring (15) coupled to the pawl (55), the pawl (55) being arranged to engage with the teeth of the ratchet gear to hold the support frame (8) at a predetermined angle relative to the upright portion (63).

6. 2. The bicycle trainer (200, 300, 400) of claim 1, wherein the bicycle trainer (300) further comprises a handle (3), the handle (3) being located at or near the top of the bicycle trainer (300) when the bicycle trainer (300) is in a folded mode.

7. 2. The bicycle trainer (200, 300, 40) of claim 1, wherein the bicycle trainer (300) further comprises a power source (64) housed in the base (6) and configured to power electrical components in the bicycle trainer (300).

8. 2. The bicycle trainer (200, 300, 400) of claim 1, wherein the flywheel module (2) further comprises a magnetic resistance component for simulating uphill riding conditions.

9. The bicycle trainer (400) of claim 1, wherein the base (6) is a one-piece base (6).

10. The bicycle trainer (300) of claim 1 further includes a belt tensioning arm (13) pivotally mounted on the first shaft (4), an idler pulley (14) pivotally mounted on the belt tensioning arm (13), and a spring (15), one end of the spring (15) is connected to one end of the belt tensioning arm (13) and the other end of the spring (15) is connected to a housing of the support frame (8), and the tension of the belt (19) automatically increases or decreases depending on the angle formed between the support frame (8) and the upright portion (63).

11. 11. The bicycle trainer (200, 300, 400) of claim 10, wherein the flywheel pulley (16), the belt tensioning arm (13), the support frame (8) and the flywheel module (2) are jointly pivoted to rotate about the first axis (4).