The invention relates to a movement device with a pedal crank, the bearing of which is arranged in a frame.
Read more
It is a pedal arrangement for active training. The crank arms have multiple holes, and the radius adjustment is achieved by offsetting the pedal at a specific hole spacing.
Furthermore, variable-length cranks, as described in DE-PS 4 43 102, are known where two sliding rails are held together by two clamps and a screw passing through both rails. To change the pedal radius, the screw must be loosened, the rail pulled apart or pushed in, and then the screw tightened again. However, this method has the disadvantage of requiring extensive adjustment work. Loosening and tightening the screw by the patient due to the crank position and the distance from the body is not feasible.
In US 42 25 130, a pedal arrangement is described, which is also adjustable but only by removing the pedal and repositioning it at a different hole spacing. This type of adjustment is not possible with a buckled foot on the pedal.
The radius adjustment is particularly important for movement equipment for bedridden and/or paralyzed individuals who must perform pedal exercises under supervision and guidance from auxiliary personnel. The feet of these individuals are firmly strapped to the pedals or foot mounts.
Using known adjustment means for this special movement equipment presents the difficulty of unbuckling the feet and removing the foot mounts to activate the adjustment device. This disadvantage is addressed by the solution according to the invention.
The invention aims to improve a generic movement device so that the radius of the pedal circles can be easily changed, even when the pedals are loaded.
Newcentury Product Page
A device particularly suitable for this is distinguished according to the invention in that at the ends of the pedal crank arms, each articulated another lever arm that carries a pedal at its opposite end and is supported by a length-adjustable strut opposite the crankshaft. The struts form the effective crank arms.
The unique advantage of this arrangement is that the radius can be easily adjusted even when the pedals are formed as foot mounts, potentially with additional support means. The feet of the patients are at least buckled on the foot mounts or fixed in another way. The adjustment mechanism is easily accessible in the area of the pedal crank axis or the strut's end near the axis.
A movement device with crank radius adjustment, especially when equipped with a motor for driving the crank, can also be constructed for use outside a hospital bed, for example, as a free-standing device for use by wheelchair users.
An embodiment of the invention is explained with reference to the drawing, whose only figure shows a side view of a movement device attached to the foot of a hospital bed.
The foot end of the bed is designed as a U-shaped tube bracket (1) with a wooden filling. A holder (2) is attached to the outside of the foot end with hooks that grip around the pipe bracket (1) and locked by clamping screws (3). On the holder (2) is a clamping bracket (4), in which a spar (5) made of square tube is clamped, pivotally mounted about a horizontal and transverse axis to the bed (6). The spar (5) with the other attached parts can be pivoted out of the bed into the position indicated by dash-dotted lines from the inclined position shown. Both end positions are determined by stops, with one adjustable stop allowing the inclination of the spar (5) to be varied as desired in the use position.
A bottom bracket (7) is attached to the inner end of the spar (5). Another lever arm (9) of the same type is articulated at the ends of the pedal crank arms (8) firmly connected by the crankshaft. These lever arms (9) carry pedals in the form of foot brackets (10) at the other end and are connected to the crank again via struts (11). These struts (11) have several holes and can thus be fixed to the crankshaft in correspondingly stepped lengths by changing the effective crank diameter.
The patient's extremities are shown schematically as dash-dotted lines, and the hip joints (12), knee joints (13), and ankle joints (14) are shown as small circles.
Are you interested in learning more about 2 cranks hospital bed? Contact us today to secure an expert consultation!
Comments
0