BIKE TRAINER

Abstract

A bike trainer includes a base seat unit including an axle member, a swing member including a main body, a first wing portion, and a second wing portion, a shock absorber unit including a first elastic member, and a second elastic member, and an accessory structure connected to the axle member and adapted to provide resistance to an exercise of a user. When the accessory structure swings the axle member rotates and the swing member swings between a left-leaning position and a right-leaning position. When the swing member is in the left-leaning position, the first wing portion compresses the first elastic member to generate a biasing force acting on the swing member in the clockwise direction. When the swing member is in the right-leaning position, the second wing portion compresses the second elastic member to generate a biasing force acting on the swing member in the anti-clockwise direction.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Taiwanese Invention Patent Application No. 112129558, filed on Aug. 7, 2023, and incorporated by reference herein in its entirety.

FIELD

The disclosure relates to an exercise machine, and more particularly to a bike trainer.

BACKGROUND

Referring to FIG. 9, a conventional bike trainer as disclosed in Taiwanese Invention Patent Publication No. TW201306903A includes a base seat 100, a support frame 110 that is fixedly connected to the base seat 100, and a transmission mechanism 200 this is disposed on the support frame 110 and that is adapted for attachment to a bicycle (not shown) of a user (not shown).

When the user is seated on the bicycle and begins training, the user will pedal the bicycle, thereby causing the bicycle to slightly sway to the left or to the right. However, because the support frame 11 is directly fixed to the base seat 10, the support frame 11 will rigidly restrict the amount of sway of the bicycle, which may cause discomfort to the user. Additionally, under prolonged use an area of the base seat 10 where the support frame 11 connects to the base seat 10 is frequently under mechanical stress which may cause damage or deformation. Therefore the conventional bike trainer has the problem of short service life.

SUMMARY

Therefore, an object of the disclosure is to provide a bike trainer that can alleviate at least one of the drawbacks of the prior art.

According to the disclosure, the bike trainer includes a base seat, a swing member, a shock absorber unit, and an accessory structure. The base seat unit includes a first seat body, a second seat body, and an axle member. The first seat body extends lengthwise in a left-right direction. The second seat body is connected to the first seat body in a front-rear direction that is perpendicular to the left-right direction. The axle member has two opposite ends, is disposed in the second seat body, extends away from the second seat body in the front-rear direction along an axis, and is rotatable relative to the second seat body in an anti-clockwise direction or a clockwise direction. The swing member includes a main body, a first wing portion, and a second wing portion. The main body is non-rotatably connected to one of the opposite ends of the axle member and is located in the first seat body at a position that is spaced apart from an inner surface of the first seat body in a top-bottom direction that is perpendicular to the left-right direction and the front-rear direction. The first wing portion is connects to the main body and extends away therefrom in the left-right direction, and is spaced apart from the inner surface of the first seat body in the top-bottom direction. The second wing portion connects to the main body and extends therefrom in the left-right direction away from the first wing portion, and is spaced apart from the inner surface of the first seat body in the top-bottom direction. The shock absorber unit includes a first elastic member, and a second elastic member. The first elastic member is located between the inner surface of the first seat body and the first wing portion. The second elastic member is located between the inner surface of the first seat body and the second wing portion. The accessory structure is connected to the other one of the opposite ends of the axle member that is away from the second seat body, is adapted to provide resistance to an exercise performed by the user. When the accessory structure sways, the axle member rotates alternately leftward and rightward, and the swing member swings between a left-leaning position and a right-leaning position relative to the first seat body. When the swing member is in the left-leaning position the first wing portion is closer to the inner surface of the first seat body than the second wing portion and the first wing portion compresses the first elastic member to generate a biasing force acting on the swing member in the clockwise direction. When the swing member is in the right-leaning position the second wing portion is closer to the inner surface of the first seat body than the first wing portion, and the second wing portion compresses the second elastic member to generate a biasing force acting on the swing member in the anti-clockwise direction.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment(s) with reference to the accompanying drawings. It is noted that various features may not be drawn to scale.

FIG. 1 is a perspective view illustrating an embodiment of a bike trainer according to the present disclosure, and a bicycle attached to the bike trainer.

FIG. 2 is a partially exploded perspective view illustrating the embodiment.

FIG. 3 is an exploded perspective view illustrating the embodiment.

FIG. 4 is a fragmentary cross-sectional view taken from line IV-IV in FIG. 2 showing a swing member of the embodiment in a balanced position relative to a seat body.

FIG. 5 is a fragmentary cross-sectional view of the embodiment taken from line V-V in FIG. 4.

FIG. 6 is a perspective view illustrating two support rods that are in a folded position.

FIG. 7 is a view similar to FIG. 4; however the swing member is in a left-leaning position relative to the base seat.

FIG. 8 is a view similar to FIG. 4; however the swing member is in a right-leaning position relative to the base seat.

FIG. 9 is a perspective view illustrating a conventional bike trainer as disclosed in Taiwanese Invention Patent Publication No. TW201306903A.

DETAILED DESCRIPTION

Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.

It should be noted herein that for clarity of description, spatially relative terms such as “top,” “bottom,” “upper,” “lower,” “on,” “above,” “over,” “downwardly,” “upwardly” and the like may be used throughout the disclosure while making reference to the features as illustrated in the drawings. The features may be oriented differently (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein may be interpreted accordingly.

Referring to FIG. 1, a bike trainer according to a first embodiment of the present disclosure is adapted for attachment to a bicycle 6 after having a rear wheel (not shown) of the bicycle 6 removed. More specifically, the bicycle 6, includes a rear frame 61. The bicycle 6 is mounted to the bike trainer via the rear frame 61 after removal of the rear wheel.

Referring to FIGS. 2, and 3, the bike trainer includes a base seat unit 1, an accessory structure 2, a swing member 3, a shock absorber unit 4, and a shell cover 5.

The base seat unit 1 includes a main support board 10, a first seat body 11, a second seat body 12, a bushing unit 13, an axle member 14, and two support rods 15. The main support board 10 is disposed beneath and fixed to the first seat body 11 and the second seat body 12. The first seat body 11 extends lengthwise in a left-right direction (Y), and has a first tapped hole 111 in a top-bottom direction (Z) that is perpendicular to the left-right direction (Y), and two second tapped hole 112 in the top-bottom direction (Z) that are spaced apart from the first tapped hole 111 in the left-right direction (Y). The second seat body 12 is connected to the first seat body 11 in a front-rear direction (X) which is perpendicular to the left-right direction (Y) and the top-bottom direction (Z). In other words, the second seat body 12 is disposed in front of the first seat body 11. The second seat body 12 has a through hole 121 that has an inner surface 122 surrounding an axis (L) extending in the front-rear direction (X).

Referring to FIGS. 3 to 5, the bushing unit 13 is sleeved on the axle member 14 and mounted in the through hole 121. The bushing unit 13 has a first sleeve portion 131 that is press fitted to the inner surface 122 of the through hole 121 of the second seat body 12, and a second sleeve portion 132 that is adjacent to the first seat body 11, that is aligned with and abutting against one end of the first sleeve portion 131 in the front-rear direction (X) proximate to the first seat body 11, and that is in slidable and rotatable contact with the inner surface 122 of the through hole 121 of the second seat body 12.

The axle member 14 has two opposite ends, is disposed in the second seat body 12, extends away from the second seat body 12 in the front-rear direction (X) along the axis (L), and is rotatable relative to the second seat body 12 in an anti-clockwise direction (D1) or a clockwise direction (D2). The axle member 14 extends through the first sleeve portion 131 and the second sleeve portion 132 along the axis (L). The axle member 14 has an axle body portion 141 that is connected to the accessory structure 2, that is in rotatable contact with the first sleeve portion 131 and the second sleeve portion 132 of the bushing unit 13, an axle end portion 142 that connects a rear end of the axle body portion 141 above the first seat body 11, and a key 143 that radially protrudes from the axle end portion 142 and that extends in the front-rear direction (X).

The two support rods 15 are disposed on two opposite sides of the accessory structure 2, and each extend away from the first seat body 11. Furthermore, the support rods 15 have pivot ends 151 that are pivotally connected to two opposite sides of the second seat body 12 that are opposite to each other in the left-right direction (Y), and free ends 152 that are opposite to the pivot ends 151.

Referring to FIGS. 1 to 3, the accessory structure 2 is connected to an end of the axle member 14 that is away from the second seat body 12, and is adapted for attachment to the bicycle 6 that is operated by a user. More specifically, the accessory structure 2 includes a mounting bar 21, a resistance unit 22, and a freewheel unit 23. The mounting bar 21 is hollow, is disposed along the axis (L), extends in the front-rear direction (X), and is connected to an end of the axle body portion 141 that is away from the axle end portion 142. In this embodiment, the axle body portion 141 has a connection section 141a extending forwardly from the second seat body 12 and non-rotatably immovably inserted into the mounting bar 21. The resistance unit 22 is mounted on the mounting bar 21. The wheel unit 23 is coupled to the resistance unit 22. The wheel unit 23 has a wheel shaft 231 adapted for attachment to the rear frame 61 (see FIG. 1) of the bicycle 6. Resistance is applied by the resistance unit 22 against the rotation movement of the wheel shaft 231. It should be noted that the structure of the bicycle 6 mounted to the accessory structure 2 of the bike trainer is well known in the art, and further details are omitted for the sake of brevity.

Referring to FIGS. 3 to 5, the swing member 3 is connected to the axle end portion 142 of the axle member 14 and is located above the first seat body 11. More specifically, the swing member 3 includes a main body 31, a first wing portion 32, and a second wing portion 33. The main body 31 is non-rotatably connected to the axle member 14 and is located in the first seat body 11 at a position spaced apart from an inner surface, specifically, an inner bottom surface, of the first seat body 11 in the top-bottom direction (Z). The first wing portion 32 connects the main body 31 and extends away therefrom in the left-right direction (Y), and is spaced apart from the first seat body 11 in the top-bottom direction (Z). The second wing portion 33 connects to the main body 31 and extends therefrom in the left-right direction (Y) away from the first wing portion 32, and is spaced apart from the inner surface of the first seat body 11 in the top-bottom direction (Z).

The main body 31 has a roughly C-shaped pipe-like structure. The main body 31 of the swing member 3 has an axle hole 311, a key groove 313, a slit 314, and two adjustment screws 315. The axle hole 311 has an inner periphery surface 312 that surrounds the axis (L). The key groove 313 is indented from the inner periphery surface 312 of the axle hole 311 and extends in the front-rear direction (X). The slit 314 extends in the front-rear direction (X) and communicates with the axle hole 311. The two adjustment screws 315 are spaced apart from each other in the front-rear direction (X). Each of the adjustment screws 315, penetrates into the main body 31 and passes through the slit 314. The axle end portion 142 of the axle member 14 is press fitted to the axle hole 311 of the main body 31. The key 143 of the axle member 14 is engaged with the key groove 313 of the main body 31, to prevent rotation of the axle end portion 142 of the axle member 14 relative to the main body 31. The slit 314 and the axle hole 311 may be adjusted in size via screwing (tightening) the two adjustment screws 315 so that the axle end portion 142 of the axle member 14 may better fit the axle hole 311 of the main body 31. This allows the axle member 14 to swing more stably with the swing member 3.

The first wing portion 32 has a first hole 321 that passes through the first wing portion 32 in the top-bottom direction (Z) and that is aligned with the first tapped hole 111. The second wing portion 33 has two second holes 331 that pass through the second wing portion 33 in the top-bottom direction (Z) and that are respectively aligned with the second tapped holes 112. The shock absorber unit 4 is located above the first seat body 11 in the top-bottom direction (Z). The shock absorber unit 4 includes a first elastic member 41 that is located between the inner bottom surface of the first seat body 11 and the first wing portion 32, and two second elastic members 42 that are located between the inner bottom surface of the first seat body 11 and the second wing portion 33. The first seat body 11 is located below the first elastic member 41 and the second elastic member 42. The first elastic member 41 is fastened to the first wing portion 32 and the first seat body 11, and the second elastic member 42 are fastened to the second wing portion 33 and the first seat body 11. The first tapped hole 111 is opened toward the first elastic member 41 and the second tapped holes 112 are opened toward the second elastic member 42. The first elastic member 41 has a first elastic body 411, a first connecting section 412, and a first threaded rod portion 413. The first connecting section 412 is connected to the first elastic body 411 and abuts against the first wing portion 32. The first threaded rod portion 413 that is connected to a side of the first elastic body 411 opposite to the first wing portion 32, and that is threadedly secured to the first tapped hole 111. Each second elastic member 42 has a second elastic body 421, a second connecting section 422, and a second threaded portion 423. The second connecting section 422 is connected to the second elastic body 421, and abuts against the second wing portion 33. The second threaded portion 423 is connected to a side of the second elastic body 421 opposite to the second wing portion 33, and is threadedly secured to the second tapped hole 112. The first hole 321 of the first wing portion 32 faces the first connecting section 412. The second hole 331 of the second wing portion 33 faces the second connecting section 422. The first connecting section 412 and the second connecting section 422 are each formed with an internal thread. The shock absorber unit 4 includes two securing screws 43 that respectively pass through the first hole 321 and the second holes 331, and are respectively screwed into the first connecting section 412 and the second connecting section 422. In this embodiment, the first wing portion 32 has one first hole 321, the second wing portion 33 has two second holes 331, and the shock absorber unit 4 further includes three securing screws 43 that respectively pass through the first hole 321 and the second holes 331.

In this embodiment, the first elastic body 411 of the first elastic member 41 and the second elastic bodies 421 of the second elastic member 42 are both made of a shock absorbing rubber material. The first connecting section 412 and the first threaded rod portion 413 of the first elastic member 41 are both made of a metal material. The second connecting section 422 and the second threaded portion 423 of the second elastic member 42 are both made of a metal material.

It should be noted that, in this embodiment, there are two second elastic members 42, and one first elastic member 41. The number of second elastic members 42 is greater than the number of first elastic members 41. However, the number of the first and second elastic members 41, 42 are not limited to that disclosed. In some embodiments, the number of the first elastic members 41 may be equal to the number of the second elastic members 42. In some embodiments, there may be more than one first elastic member 41. It should be noted that the number of the first tapped hole 111 and the number of the first hole 321 of the first wing portion 32 may correspond to the number of the first elastic member 41, and the number of the second tapped hole 112 and the number of the second hole 331 of the second wing portion 33 may correspond to the number of the second elastic member 42.

The shell cover 5 covers the first and second seat bodies 11, 12, the swing member 3 and the shock absorber unit 4 and is secured to the second seat body 12 via screws.

Referring to FIGS. 1 and 6, the two support rods 15 are movable between an unfolded position and a folded position. In the unfolded position, the free ends 152 of the support rods 15 are distal to the accessory structure 2, the base seat unit 1 is approximately in a V-shape, and the base seat unit 1 and the free ends 152 are seated on a floor or the ground and the bike trainer is ready for use. In the folded position, the free ends 152 of the support rods 15 are proximate to the accessory structure 2, the base seat unit 1 is approximately in an I-shape, and the bike trainer is in a compact size which facilitates storage.

Referring to FIGS. 4, 7 and 8, when the bike trainer is in use, and the user (not shown) is pedaling the bicycle 6, the bicycle 6 may sway, bringing the accessory structure 2 of the bike trainer to sway. When the accessory structure 2 sways, the mounting bar 21 together with the axle member 14 rotates alternately leftward and rightward, and the swing member 3 swings between a left-leaning position and a right-leaning position relative to the first seat body 11. When the user stops pedaling the bicycle, the swing member 3 will gradually return to a balanced position relative to the first seat body 11.

Referring to FIG. 4, when the swing member 3 is in the balanced position, the first wing portion 32 and the second wing portion 33 are approximately equidistant to the inner bottom surface of the first seat body 11, and the first wing portion 32 and the second wing portion 33 respectively do not compress the first elastic member 41 and the second elastic member 42.

Referring to FIG. 7, when the swing member 3 is in the left-leaning position, the first wing portion 32 is closer to the inner bottom surface of the first seat body 11 than the second wing portion 33, and the first wing portion 32 compresses the first elastic member 41 to generate a biasing force acting on the swing member 3 in the clockwise direction (D2). Additionally, when the swing member 3 is in the left-leaning position, the second wing portion 33 is distal to the inner bottom surface of the first seat body 11 and stretches the second elastic member 42. The second elastic member 42 will generate a clockwise (D2) biasing force that acts on the swing member 3.

Referring to FIG. 8, when the swing member 3 is in the right-leaning position, the second wing portion 33 is closer to the inner bottom surface of the first seat body 11 than the first wing portion 32, and the second wing portion 33 compresses the second elastic member 42 to generate a biasing force acting on the swing member 3 in the anti-clockwise direction (D1). Additionally, when the swing member 3 is in the right-leaning position, the first wing portion 32 is distal to the inner bottom surface of the first seat body 11 and stretches the first elastic member 41, and the second wing portion 33 is proximate to the inner bottom surface of the first seat body 11. The first elastic member 41 will generate an anti-clockwise (D1) biasing force that acts on the swing member 3. In other words, if a user were to manipulate the accessory structure 2 by pushing the accessory structure 2 so that the swing member 3 is moved to the left-leading or the right-leaning position relative to the first seat body 11; when the user stops pushing the accessory structure 2, the first elastic member 41 and the second elastic member 42 will cause the swing member 3 to continue oscillation until the swing member 3 returns to the balanced position.

Therefore when the user on the bicycle 6 pedals, the user's pedaling motion may cause swaying in the accessory structure 2 of the bike trainer, and the first elastic member 41 and the second elastic member 42 may help to dampen the swaying by generating biasing forces to act on the swing member 3 in the clockwise direction (D2) or the anti-clockwise direction (D1) that opposes a left-leaning force or a right-leaning force caused by the user pedaling. This increases user comfort while pedaling and increases the user's workout efficiency. Additionally because stress between the bicycle 6 and the accessory structure 2 may be dissipated via the swing member 3 the likelihood of damage between the bike trainer and the bicycle 6 may be decreased. Furthermore, by having the axle body portion 141 of the axle member 14 being in rotatable contact with the first sleeve portion 131 and the second sleeve portion 132, the rotation of the axle member 14 may be smooth, stresses between joining parts of the base seat unit 1 and the mounting bar 21 are reduced and the service life of the bike trainer is increased.

In should be noted that, the structure of the first and second elastic members 41, 42 may be implemented differently and is not limited to the example disclosed above. In some embodiments, the first elastic member 41 and the second elastic member 42 may each be a compression spring or a leaf spring.

In summary of the above, in the bike trainer according to the present disclosure, by virtue of the swing member 3 and the shock absorber unit 4 being able to dampen swaying in the accessory structure 2, the user may pedal with more comfort on the bike trainer, and the bike trainer may have a longer service life.

In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiment(s). It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects; such does not mean that every one of these features needs to be practiced with the presence of all the other features. In other words, in any described embodiment, when implementation of one or more features or specific details does not affect implementation of another one or more features or specific details, said one or more features may be singled out and practiced alone without said another one or more features or specific details. It should be further noted that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.

While the disclosure has been described in connection with what is(are) considered the exemplary embodiment(s), it is understood that this disclosure is not limited to the disclosed embodiment(s) but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.

Claims

1. A bike trainer comprising: a base seat unit including a first seat body that extends lengthwise in a left-right direction, a second seat body that is connected to said first seat body in a front-rear direction that is perpendicular to the left-right direction, and an axle member that has two opposite ends, that is disposed in said second seat body, that extends away from said second seat body in the front-rear direction along an axis, and that is rotatable relative to said second seat body in an anti-clockwise direction or a clockwise direction;a swing member including a main body that is non-rotatably connected to one of said opposite ends of said axle member and that is located in said first seat body at a position spaced apart from an inner surface of said first seat body in a top-bottom direction that is perpendicular to the left-right direction and the front-rear direction, a first wing portion that connects said main body and extends away therefrom in the left-right direction, and that is spaced apart from said inner surface of said first seat body in the top-bottom direction, and a second wing portion that connects to said main body and extends therefrom in the left-right direction away from said first wing portion, and that is spaced apart from said inner surface of said first seat body in the top-bottom direction;a shock absorber unit including a first elastic member that is located between said inner surface of said first seat body and said first wing portion, and a second elastic member that is located between said inner surface of said first seat body and said second wing portion;an accessory structure that is connected to the other one of said opposite ends of said axle member that is away from said second seat body, and that is adapted to provide resistance to an exercise performed by a user;wherein, when said accessory structure sways, said axle member alternately rotates leftward and rightward and the swing member swings between a left-leaning position and a right-leaning position relative to said first seat body;wherein when said swing member is in the left-leaning position, said first wing portion is closer to said inner surface of said first seat body than said second wing portion, and said first wing portion compresses said first elastic member to generate a biasing force acting on said swing member in the clockwise direction; andwherein when said swing member is in the right-leaning position, said second wing portion is closer to said inner surface of said first seat body than said first wing portion, and said second wing portion compresses said second elastic member to generate a biasing force acting on said swing member in the anti-clockwise direction.

2. The bike trainer as claimed in claim 1, wherein: said first elastic member is fastened to said first wing portion and said first seat body, and said second elastic member is fastened to said second wing portion and said first seat body;when said swing member is in the left-leaning position, said second wing portion is distal to said inner surface of said first seat body and stretches said second elastic member, said second elastic member generating a clockwise biasing force that acts on said swing member; andwhen said swing member is in the right-leaning position, said first wing portion is distal to said inner surface of said first seat body and stretches said first elastic member, said first elastic member generating an anti-clockwise biasing force that acts on said swing member.

3. The bike trainer as claimed in claim 1, wherein said inner surface of said first seat body is located below said first elastic member and said second elastic member.

4. The bike trainer as claimed in claim 1, wherein said second seat body is in front of the first seat body.

5. The bike trainer as claimed in claim 4, wherein: said second seat body has a through hole that has an inner surface;said base seat unit further including a bushing unit sleeved on said axle member and mounted in said through hole; andsaid axle member has an axle body portion that is connected to said accessory structure, and that is in rotatable contact with said bushing unit, and an axle end portion that extends from said axle body portion away from said accessory structure, and that is non-rotatably connected to said main body of said swing member.

6. The bike trainer as claimed in claim 5, wherein: said bushing unit has a first sleeve portion that is press fitted to said inner surface of said through hole of said second seat body, and a second sleeve portion that is aligned with said first sleeve portion in the front-rear direction and abutting against one end of said first sleeve portion proximate to said first seat body, and that is in rotatable contact with said inner surface of said through hole of said second seat body; andsaid axle body portion of said axle member is in rotatable contact with said first sleeve portion and said second sleeve portion.

7. The bike trainer as claimed in claim 5, wherein: said main body of said swing member has an axle hole having an inner periphery surface that surrounds said axis, and a key groove indenting from said inner periphery surface of said axle hole and extending in the front-rear direction;said axle end portion of said axle member is press fitted into said axle hole of said main body;said axle member further has a key that radially protrudes from said axle end portion and extends in the front-rear direction, and that is engaged with said key groove of said main body.

8. The bike trainer as claimed in claim 1, wherein: said first seat body has a first tapped hole in the top-bottom direction that is opened toward said first elastic member, and a second tapped hole in the top-bottom direction that is opened toward said second elastic member;said first elastic member having a first elastic body, a first connecting section that is connected to said first elastic body, and that abuts against said first wing portion, and a first threaded rod portion that is connected a side of said first elastic body opposite to said first wing portion, and that is threadedly secured to said first tapped hole;said second elastic member having a second elastic body, a second connecting section that is connected to said second elastic body, and that abuts against said second wing portion, and a second threaded portion that is connected to a side of said second elastic body opposite to said second wing portion, and that is threadedly secured to said second tapped hole;said first wing portion has a first hole that passes through said first wing portion in the top-bottom direction, and that faces said first connecting section, said second wing portion having a second hole that passes through said second wing portion in the top-bottom direction, and that faces said second connecting section; andsaid shock absorber unit further including two securing screws that respectively pass through said first hole and said second hole, and that are respectively screwed into said first connecting section and said second connecting section.

9. The bake trainer as claimed in claim 1, wherein: said base seat unit including two support rods that are disposed on two opposite sides of said accessory structure, said support rods respectively having pivot ends that are pivotally and respectively connected to two opposite ends of said second seat body that are opposite to each other in the left-right direction, and free ends that are opposite to said pivot ends;said two support rods are movable between an unfolded position where said free ends of said support rods are distal to said accessory structure and a folded position where said free ends of said support rods are proximate to said accessory structure.

10. The bike trainer as claimed in claim 1, wherein when said swing member is in a balanced position, said first wing portion and said second wing portion are equidistant to said inner surface of said first seat body, and said first wing portion and said second wing portion respectively do not compress the first elastic member and the second elastic member.

11. The bike trainer as claimed in claim 1, wherein: said accessory structure includes a mounting bar that is hollow and that extends in the front-rear direction,a resistance unit mounted on said mounting bar, anda freewheel unit coupled with said resistance unit and having a wheel shaft adapted for attachment to a rear frame of a bicycle;said base seat unit further includes a main support board disposed beneath and fixed to said first seat body and said second seat body, said first seat body and said second seat body being disposed in front of said first seat body; andsaid axle body portion has a connection section extending forwardly from the second seat body and non-rotatably immovably inserted into said mounting bar.