US 20030203796 A1
The invention is an adjustable weight-bearing mechanism, especially the stepless adjustable weight-bearing mechanism designed for fitness exercise equipment that can be adjusted in accordance with one's weight bearing without the differentiation in weight, comprising a trough-shaped case equipped with a friction wheel, a spool, a one-way clutch, a return spring coil, a pressure plate and a pressure button. A pulling rope is coiled on the spool for the pulling of the fitness equipment with the one way clutch to control the friction wheel to rotate with the pulled pulling rope, while remains still in the reversal direction. Then the pressure plate allows it and the pressure button to adjust the friction caused by the revolving friction wheel to form the bearing weight during the pulling of the pulling rope, yet the weight can be adjusted with the pressure button to fit in with the user's exercising demand.
1. An adjustable weight-bearing mechanism, comprising a case, a friction wheel and a spool, characterized in that:
said case is a trough-shaped mechanism with said friction wheel and said spool installed inside and can be set on fitness exercise equipment;
said friction wheel is a pair of stepless adjustable weight-bearing mechanism passing through a center of said case with an axle link, on an edge of said wheel is designed with a concave ring trough with a hollow screw passing through said axle link at said center, and at a corresponding location to said case is set with a pressure plate and a pressure button, on a front edge of said pressure plate is installed with a lining against said concave ring trough in accordance with width of said concave ring trough, a screw shaft stretching in front of said pressure button presses against a back of said pressure plate through case screws to adjust friction caused by said pressure plate to said friction wheel; and
said spool is a pair of revolving wheels for receiving force and for pulling, a pulling rope coils around said wheel with a ball head of said rope protruding against a locating plate of said case, the interior of said spool is divided as a middle-wheel and an internal wheel, on an edge of said internal ring of said middle wheel are set with several grooves for a return spring coil to clench, interior of said wheel can be placed with a return spring coil and a pair of one-way clutch meshed inside said internal wheel, on an edge of said internal wheel of a clutch is set with threads corresponding to threads of a hollow screw allowing said spool to combine with said friction wheel by a screwed hollow screw of an one-way clutch and drive said friction wheel to revolve in compliance with characteristics of said one-way clutch, while on the reverse causes it to idle, meanwhile, a pinned button is installed adequately on an edge of said case's surface connecting a pinion shaft inside said case meshing a pair of transposable gear wheels with said protruding locating pins fixed, said locating pins can be inserted with a fixed part of an internal ring of said return spring coil so that said button can adjust bounce of said return spring coil by rotating said locating pin, all components thus form a stepless adjustable weight-bearing mechanism through connection of each part.
 Please refer to FIGS. 2 and 3, the three-dimensional illustration and cross-sectional illustration for the present invention. The present invention is an adjustable weight-bearing mechanism, the stepless adjustable weight-bearing mechanism designed for fitness exercise equipment, in which it contains the case 1, the friction wheel 2 and the spool 3. The case 1 is a trough-shaped equipment installed with the friction wheel 2 and the spool 3 inside. The case 1 can be installed on the fitness exercise equipment to bring out the efficacy of the frictional wheel 2 and the spool 3. The frictional wheel 2 is a pair of stepless adjustable weight-bearing mechanism with one axis link 10 adequately passing through the case 1. The concave ring trough surrounds around the frictional wheel 2 with the hollow screw 22 passing through the axis shaft 10. On the corresponding location of the case 1 is set with the pressure plate 23 and the pressure button 24. The front edge of the pressure plate 23 is furnished with the lining 230 in accordance with the width of the concave ring trough 21, and keeps the pressure plate 23 with the lining 230 holding up to the concave ring trough 21 of the frictional wheel 2, as shown in FIG. 4. Then with the spiral link 240 stretching from the pressure button 24 passing through the case 1 to the back of the pressure plate 23, the pressure button 24 can forces the pressure plate 23 to make the lining 230 press against the concave ring trough 21, which then controls the frictional gravity of the frictional wheel 2. The spool 3 is a pair of revolving mechanism designed for pulling. On the outside ring of the spool 3 is a pair of pulling rope 31 coiled. The ball head 30 of the pulling rope 31 protrudes the locating plate 11 on the edge of the case 1. Inside the spool 3 is divided into middle wheel loop 32 and internal wheel loop 33. Inside the middle wheel loop 32 is set sidelong with several cannelure 320 distributed at equal distance that can allow a pair of return spring coil 34 to get stuck. The space of the middle wheel loop 32 is sufficient for placing the return spring coil 34. The interior of the internal wheel loop 33 allows a one way clutch 35 to stick to each other and the inner loop of the one way clutch 35 is installed with internal threads to match up with the external threads of the hollow screw 22 on the friction wheel 2, which allows the spool 3 to combine with the friction wheel 2 with the hollow screw 22 of the one way clutch 35. Then, with the “one-way transmission, reverse-way idle” of the one-way clutch 35, When the spool 3 is pulled and revolves, the friction wheel 2 is driven to revolve, as shown in FIG. 5. However, if the spool 3 revolves reversely without driving the friction wheel 2 to revolve, a pair of pinned revolving button 36 is set adequately on the surface outside the case 1, which connects the pinion shaft 37 inside the case 1 that occludes a pair of transposable gear wheel 38 with the tooth. The transposable gear wheel 38 is installed with a fixed and protruding locating pin 39, as shown in FIGS. 6 and 7, that can be inserted to the return spring coil 34 for the revolving of the revolving button 36 to push the transposable gear wheel 38 through the pinion shaft 37. Furthermore, the locating pin 39 on the transposable gear wheel 38 stimulates the return spring coil 34 to tighten or release the bounce, which forms a mechanism that adjust the bounce of the return spring coil 34. The whole combination of these components is installed behind the back inside the case, which is then installed onto the fitness exercise equipment. Then, connect the pulling rope of the exercise equipment to the ball head 310 of the pulling rope of the present invention for the ball head 310 to be pulled up during exercise. The pulled ball head 310 makes the pulling rope 31 to drive the spool 3 to revolve clockwise and then, with the revolving of the friction wheel 2 driven through the characteristic of the one way clutch 35, the pressure plate 23 on the friction wheel 2 can adjust the friction to the concave ring trough 21 by the spiral link 24 of the pressure button that adjusts the lining 230 to create the equal drag force against the user and enable the spool 3 to revolve. The pulling rope 31 bears certain level of weight, which can be adjusted steplessly with the pressure button 24. Meanwhile, the return spring coil 34 inside the middle wheel 32 of the spool 3 generates the corresponding bounce during exercise, which also increases the weight. When the weight of the pulling rope 31 disappears, the reversal bounce of the return spring coil 34 enables the spool 3 to revolve reversely and draws the pulling rope 31 and the ball head 310 back. However, because of the characteristic of the one way clutch 35, the reversal movement does not drive the friction wheel 2 to revolve, nor does it generate the weight from the friction of the pressure plate 23; meanwhile, because the bounce of the return spring coil 34 can be adjusted by the revolving button 36, the pinion shaft 37, the transposable gear wheel 38 and the locating pin 39, the reversal bounce of the return spring coil 34 makes the pulling rope 31 and the ball head 310 to return to the original location. In this way, the weight of the whole fitness equipment is completed by the components of the case 1. What's more, the stepless adjustment by the pressure button 24 and the revolving button 36 cut down the possibility of inconvenience and waste. The movement inside the case prevents the damage to human bodies, while improves the problems of the traditional products, which in turn enhances the beneficial value of the equipment. The present invention is considered as a product that combines the novelty, convenience and practicability.
FIG. 1 is a three-dimensional illustration for the traditional fitness exercise equipment.
FIG. 2 is a three-dimensional illustration for the present invention.
FIG. 3 is a structural illustration for the present invention.
FIG. 4 is an A-A cross-sectional illustration of the present invention.
FIG. 5 is a B-B cross-sectional illustration of the present invention.
FIG. 6 is a C-C cross-sectional illustration of the present invention.
FIG. 7 is a D-D cross-sectional illustration of the present invention.
 The present invention is an adjustable weight-bearing mechanism designed for fitness exercise equipment. It provides exquisite and easy-to-use functions, while avoids the complication and danger of the prior art that uses several pairs of metal bricks, which in turn adapts to each type of user's demand and offers practicability.
 The fitness exercise equipment of the prior art as shown in FIG. 1 comprises multiple functions that offers training of arm force, waist force and leg force. At the back of the pulled objects of each equipment is set with several metal bricks in piles connected and dragged by a steel rope and with a thin pin inserted in the desired bricks to allow it to drive the metal bricks to move up and down during exercise, which forms the weight against the exerciser and brings the effectiveness of exercise and fitness. However, before the user using such equipment, the user has to choose the amount of the metal bricks equaling to the user's weight bearing, which is set at the back of the equipment, whatever the user wants to train up. Then change the inserted pairs with the inserting pin to choose the desired weight for the exercise. In this case, it takes lots of metal bricks to conform to each user's demand with different selection; however, the user might not use all metal bricks during exercise, which causes the remaining bricks as a waste of resources and influences the cost benefit greatly. Moreover, the user choosing the inserted pairs or the bricks moving up and down cause great noises and tend to clip and harm others, which cuts down the efficiency of the fitness exercise equipment. The present invention is to provide an adjustable stepless weight-bearing mechanism that saves the use of metal bricks, whose innovation and delicacy is different from products of the prior art. The innovation of special stepless friction brings higher benefits to the present invention.
 The objective of the present invention is to provide adjustable weight-bearing equipment that, with the delicate structure, saves the space of installing on the fitness exercise equipment. With the weight caused by the pulling of the spool and the friction wheel and the pressure plate on the friction wheel that uses the stepless adjustment with the pressure button to bring the stepless weight adjustment into full play, while eliminates the risk of danger during exercise and enhances the benefits of the exercise equipment to a new and practicable stage.