Bicycle exerciser

Abstract

A bicycle exerciser including a base frame, a seat post connected to the base frame, a seat disposed on the seat post, a front stem connected to the base frame, a handlebar disposed on the front stem, a flywheel connected to the base frame pivotally, a chain guard casing disposed on the base frame, and a pedal connected to the chain guard casing wherein the bicycle exerciser is adjusted by a sectional adjustment device in order to control various sectional resistance of a flywheel.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a bicycle exerciser, and more particularly to a bicycle exerciser which is adjusted by a sectional adjustment device in order to control various sectional resistance of a flywheel.

2. Description of related art

A conventional bicycle exerciser does not have a sectional adjustment device in order to control various sectional resistance of a flywheel according to graduations on the sectional adjustment device.

SUMMARY OF THE INVENTION

A primary object of the present invention is to provide a bicycle exerciser with a sectional adjustment device which can exercise a body of a user and exercise a load training of legs of a user. The bicycle exerciser is adjusted by the sectional adjustment device in order to control various sectional resistance of a flywheel.

Another object of the present invention is to provide a sectional adjustment device which uses a graduation type adjustment. When a length of a drawing steel rope is adjusted, a friction resistance pad will be tightened or loosened in order to control various sectional resistance of a flywheel by graduation type adjustment.

Another object of the present invention is to provide a bicycle exerciser having a sectional adjustment device which has a simple structure to be manufactured easily and operated easily.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a bicycle exerciser of the present invention.

FIG. 2 is an enlarged perspective of a sectional adjustment device of the present invention.

FIG. 3 is a schematic view illustrating an operation of a sectional adjustment device while a friction resistance pad is loosened.

FIG. 4 is a schematic view illustrating an operation of a sectional adjustment device while a friction resistance pad is tightened.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

Referring to FIG. 1 to 4. a bicycle exerciser 20 has a base frame 204, a seat post 203 connected to the base frame 204, a seat 213 disposed on the seat post 203,a front stem 201 connected to the base frame 204, a handlebar 214 disposed on the front stem 201, a positioning crossbar 202 connected to the seat post 203 and the front 201, a flywheel 210 connected to the base frame 204 pivotally, a chain guard casing 212 disposed on the base frame 204, a pedal 211 connected to the chain guard casing 212, a sectional adjustment device 205 connected to the front stem 201 and the positioning crossbar 202, a drawing steel rope 206 winding the sectional adjustment device 205 to connect to two parallel extension springs 208, and two friction resistance pads 209 each connected to one extension spring 208.

Each of the friction resistance pads 209 is adjacent to the flywheel 210. A braked device 207 is connected to the sectional adjustment device 205 to brake the bicycle exerciser 20.

The front stem 201 can have various shapes such as an N shape and an inverse Y shape.

A plurality of graduations 2051 are located on the sectional adjustment device 205. The graduations 2051 indicate graduation type adjustment.

Referring to FIG. 2 and 3 again, the graduations 2051 of the graduation type adjustment are turned to an indication showing a resistance of the flywheel 210 is small. The length of the drawing steel rope 206 is extended in order to loosen the extension spring 208. The friction resistance pads 209 will not catch the flywheel 210 tightly so that the resistance of the flywheel 210 is small.

Referring to FIG. 4 again, the graduations 2051 of the graduation type adjustment are turned to an indication showing a resistance of the flywheel 210 is large.

The length of the drawing steel rope 206 is shortened in order to tighten the extension springs 208. The friction resistance pads 209 will catch the flywheel 210 tightly so that the resistance of the flywheel 210 is large.

Claims

1. A bicycle exerciser having a base frame, a seat post connected to the base frame, a seat disposed on the seat post, a front stem connected to the base frame, a handlebar disposed on the front stem, a flywheel connected to the base frame pivotally, a chain guard casing disposed on the base frame, and a pedal connected to the chain guard casing, characterized in that:

a sectional adjustment device is connected to the front stem and the positioning crossbar,

a drawing steel rope winds the sectional adjustment device and are connected to two friction resistance pads,

each of the friction resistance pads is adjacent to the flywheel, and wherein

a length of the drawing steel rope is adjusted, each of the friction resistance pads will be tightened or loosened to control various sectional resistance of the flywheel.

2. The bicycle exerciser according to claim 1, wherein a positioning crossbar is connected to the seat post and the front stem.

3. The bicycle exerciser according to claim 1, wherein the front stem has an N shape.

4. The bicycle exerciser according to claim 1, wherein the front stem has an inverse Y shape.

5. The bicycle exerciser according to claim 1, wherein a plurality of graduations is located on the sectional adjustment device and the graduations indicate graduation type adjustment.

6. The bicycle exerciser according to claim 1, wherein two parallel extension springs are connected to the drawing steel rope and each of the two friction resistance pads is connected to one extension spring.