Chair-type bicycle exercise device
DESCRIPTION OF THE INVENTION: 
     The present invention relates to an exercise device. 
     Objects of the invention are to provide an exercise device of simple structure which is inexpensive in manufacture, used with facility, convenience and comfort by a seated user, and functions efficiently, effectively and reliably to provide exercise of the leg and thigh muscles of a user seated in a chair. 
     In order that the invention may be readily carried into effect, it will now be described with reference to the accompanying drawing, wherein: 
     FIG. 1 is a schematic diagram of an embodiment of the exercise device of the invention; 
     FIG. 2 is a view, partly in section, on an enlarged scale, of part of the exercise device of FIG. 1; 
     FIG. 3 is a sectional view, taken along the lines III--III, of FIG. 2; 
     FIG. 4 is a side view of another embodiment of the exercise device of the invention; and 
     FIG. 5 is a view, partly in section, on an enlarged scale, of part of the embodiment of FIG. 4. 
    
    
     In the FIGS., the same components are identified by the same reference numerals. 
     The exercise device of the invention provides exercise for the leg and thigh muscles of a seated user. 
     The exercise device of the invention comprises a frame 1 (FIGS. 1 to 3) or 1&#39; (FIG. 4). 
     Bicycle-type pedals 2 and 3 (FIG. 1) or 2&#39; and 3&#39; (FIG. 4) are rotatably mounted on the frame 1 or 1&#39; in a manner whereby the pedals are rotatable by a user seated in a chair 4 (FIG. 1) or 4&#39; (FIG. 4) in proximity with the frame 1 or 1&#39;. 
     In the embodiment of FIGS. 1 to 3, support legs 5, 6, 7 and 8 (FIG. 1) on the frame 1 adjustably mount the frame on a supporting surface 9. The frame 1 is supported with the pedals 2 and 3 a selected distance above the surface 9. This is accomplished by passing bolts 10 and 11 through spaced holes in the legs 5 and 6 and spaced corresponding holes 12, 13, and the like, in the frame. Similarly, bolts 14 and 15 are passed through spaced holes through the legs 7 and 8 and spaced corresponding holes 16, 17, and the like, through the frame 1. 
     As shown in FIGS. 2 and 3, an arm 18 supporting the pedals 2 and 3 or 2&#39; and 3&#39; is rotatably mounted on the frame 1 or 1&#39; by split bearings 19 and 20. 
     In the embodiment of FIGS. 4 and 5, a chair 4&#39; has a seat 21 having an undersurface 22 (FIG. 5). A guide device 23 (FIG. 5) is affixed to the undersurface 22 of the seat 21 of the chair 4&#39; and slidably accommodates and supports one end 24 of the frame 1&#39; for movement under and in front of the chair 4&#39;. The other end 25 of the frame 1&#39; is adjustably supported on the supporting surface 9 in the same manner as is the frame 1 of the embodiment of FIGS. 1 to 3 so that the pedals 2&#39; and 3&#39; are supported a selected distance above such surface. The pedals 2&#39; and 3&#39; are thus positionable relative to the chair 4&#39; by a user seated in the chair and the pedals are rotatable by the user to exercise his or her legs and thighs. 
     While the invention has been described by means of specific examples and in specific embodiments, I do not wish to be limited thereto, for obvious modifications will occur to those skilled in the art without departing from the spirit and scope of the invention.