KR200249815Y1 - Step exerciser - Google Patents

Abstract

The step exerciser of the present invention includes two pedal rods coupled to two cranks on both sides of the wheel axle of the flywheel so that the flywheel rotates when the user alternates the pedal rod up and down, and a cylindrical rod at one end of each of the cranks. And a coupling device coupled to the U-shaped lug at one end of each of the pedal rods, the coupling device being firmly connected to the horizontal shaft bearing block and the vertical shaft bearing block connected to the U-shaped lug by screw bolts and retaining nuts. A U-shaped lug at one end of the rod supports a cylindrical rod of one of the cranks to reduce friction and noise during operation of the step excercise.

Description

Step Exerciser {STEP EXERCISER}

The present invention relates to a motion mechanism, in particular using a coupling device having a horizontal axis bearing block and a vertical axis bearing block to couple each pedal rod to a crank at each end of the wheel shaft of the flywheel, thus producing less noise during operation. It's about a step exerciser.

1 and 2 show a step exerciser according to the prior art. According to the structure of this step excercise, two cranks 821 are respectively coupled between the end of the wheel shaft of the flywheel 82 and the two pedal rods 81, and each of the pedal rods 81 has one crank ( 8 21, an axial sleeve 812 coupled to the cylindrical rod 8211 and a rear end attached to the roller 811, the rollers each pedal rod 81 at the longitudinal axis sliding groove 831 of each rail 83. Moved by).

The structure of such a step exerciser has disadvantages. While the step exerciser is in operation, the pedal rod 81 tends to vibrate as it moves back and forth along the longitudinal sliding grooves 831 of each rail 83, producing loud noise. Further, frictional resistance is generated at the connection surface between each crank 821 and the corresponding pedal rod 81 to induce the movement of each pedal rod 81.

Another structure of the prior art is shown in FIG. 3. Here, the pedal rod 81 has a barrel 912 disposed laterally at one end and coupled to the cylindrical rod 9211 of one crank 921, and the bushing 94 is attached to the cylindrical rod 9211. It is sleeved and secured to the interior of the barrel by a holding down screw 95.

When assembled, a gap 910 occurs between the outer wall of the bushing 94 and the inner wall of the barrel 912 to regulate the relative movement between the pedal rod 91 and the crank 921.

This design is still unsatisfactory in terms of functionality. Since the holding down screw 95 stops directly at the surface of the bushing 94, the holding down screw 95 wears quickly as it is used, and more noise is produced during the reciprocating movement of the pedal rod 91. Moreover, since the cylindrical rod 912 is coupled to the pedal rod 91 in the horizontal direction, the driving force is not effectively transmitted from the pedal rod 91 to the crank 921, and the user moves the crank 921 to the vertical position. It takes a lot of force to move the pedal rod 91 during the stroke.

The present invention provides a step exerciser that overcomes the structural disadvantages of the prior art described above.

According to one aspect of the present invention, the step exerciser comprises: two pedal rods coupled to two cranks on either side of the flywheel's wheel axis to allow the flywheel to rotate when the user alternates the pedal rod up and down, A coupling device coupled to the U-shaped lug at one end of each of the cylindrical rod and the pedal rod at each end of the crank, the coupling device comprising: a vertical shaft bearing block connected to the U-shaped lug by a screw bolt and a fixing nut; It is rigidly connected at right angles to the horizontal shaft bearing block and has a horizontal shaft bearing block that supports one cylindrical rod of one of the cranks in the U-shaped lug at one end of the pedal rod to reduce friction and noise during step excerculator operation.

When assembled, a gap is created between the outer surface of the horizontal shaft bearing block of the coupling device and the inner surface of the U-shaped lug to regulate the reciprocating motion of each pedal rod in the longitudinal sliding groove of each rail.

According to another aspect of the present invention, each crank has a first crank half and a second crank half connected at right angles to effectively transmit the driving force.

1 is a side view of a step exerciser according to the prior art.

2 is an enlarged cross-sectional view of a portion of FIG. 1;

3 is an elevational view of a portion of another structure of a step exerciser according to the prior art.

4 is an elevation view of a step exerciser according to the present invention.

5 is a perspective view of a part of the step exerciser according to the present invention.

6 is an exploded view of a portion of the present invention.

7 is an enlarged assembly view of FIG. 6.

Figure 8 is an enlarged cross-sectional view showing a longitudinal axis sliding groove structure of the rail of the present invention.

* Explanation of symbols on the main parts of the drawing

1: base frame 2: front upright

3: flywheel 4: pedal rod

5: link 6: connecting device

7: handle 20: shell

30: damping wheel 32: crank

40: Footboard 42: U-shaped lug

60: gap

4 to 8, the step exerciser of the present invention includes two parallel rails 11, each rail 11 having a base frame 1 having a longitudinal axis sliding groove 111, and a base. Front uprights 2 extending upward from the front of the frame 1, two handles 7 pivoting from both sides of the front uprights 2, and the front uprights 2 near the base frame 1, respectively. Flywheel 3 (see FIG. 4) supported on the damper, damping wheel 30 (see FIG. 5) mounted to the base frame 1 and transmitting a braking resistance to the flywheel 3, and wheel of the flywheel 3. Two cranks 32 each having one end coupled to both opposing ends of the shaft 31 and the other end securely attached to the cylindrical rod 321 extending outward, and to the outside of each of the cranks 32. Respectively the front end portion pivoted on the elongated cylindrical rod 321 and the rear end portion attached to each roller 41, respectively. The two pedal rods 4 and the rollers are moved back and forth in the longitudinal sliding grooves 111 of one rail 11 of the base frame 1 by the respective pedal rods 4, and the pedals from above. Two scaffolds 40 firmly mounted at the center of the rod 4, and a rear end 51 (refer to FIG. 5) and one pivoting side rod 43 on one side of one pedal rod 4 Two links 5 each having a front end 52 pivoting on the lower end 71 of the handle 7 and an upright 2 for protecting the flywheel 3 and the damping wheel 30 from the outside. It includes a shell 20 mounted on. When the pedal rod 4 alternates with the foot, the flywheel 3 rotates so that the crank 32 moves along the elliptic path, and the roller 41 of each pedal rod 4 moves the longitudinal axis of the corresponding rail 11. It moves back and forth along the sliding groove 111, and the handle 7 moves back and forth alternately.

The main features of the present invention are described below. Each crank 32 is bent from the first crank half 322 and the first crank half 322 coupled to one end of the wheel shaft 31 of the flywheel 3 and extends from the second crank half 323. ). The cylindrical rod 321 of each crank 32 extends vertically from the outside of one end of the second crank half 322 of the crank 32. The connecting device 6 is coupled between the cylindrical rod 321 of one crank 32 and the front end of one pedal rod 4. The connecting device 6 comprises a horizontal shaft bearing block 61 and a vertical shaft bearing block 62 which is firmly connected to the periphery at right angles thereto. The horizontal shaft bearing block 61 includes a shaft through hole 611 and a shaft bearing 620 mounted to the shaft through hole. The vertical shaft bearing block 62 includes a shaft through hole 62 and a shaft bearing 620 mounted to the shaft through hole 64. The front end of each pedal rod 4 is firmly mounted with a U-shaped lug. U-shaped lug 42 is connected between horizontal top wall portion 421, horizontal bottom wall portion 422, horizontal top wall portion 421, and horizontal bottom wall portion 422 on one side and each pedal A semicircular arc sidewall portion 420 fixed to the front end of the rod 4, a first pivot hole 4211 formed in the horizontal upper wall portion 421, and a second formed in the horizontal bottom wall portion 422. A pivot hole 4221. The screw bolt 63 connects the first pivot hole 4211 of the U-shaped lug, the second pivot hole 4221, and the axial bearing 620 of the vertical shaft bearing block 62 of the coupling device 6. It is inserted through and fastens the connecting device 6 to the U-shaped lug with the horizontal shaft bearing block 61 suspended in the U-shaped lug. The cylindrical rod 321 extending out of each crank 32 is supported by the shaft bearing 613 of the horizontal shaft bearing block 61 of the connecting device 6. After the cylindrical rod 321 extending out of each crank 32 is inserted through the axial bearing 613 of the horizontal axial bearing block 61 of the connecting device 6, the clamp 65 extends outward. Fixed to the end of the cylindrical rod 321, each crank 32 is secured to the horizontal shaft bearing block 61 of each connecting device 6. When assembled, the gap 60 is smoothed by the sidewall portion of the perimeter 610 of the horizontal shaft bearing block 61 of each connecting device 6 and the U-shaped lug 42 of each pedal rod 4. Between internal surfaces of 420 (see FIG. 7). The gap 60 adjusts the reciprocating motion of each pedal rod 4 in the longitudinal axis sliding groove 111 of each rail 11 while reducing the generation of noise during the reciprocating motion of each pedal rod 4. The head of the screw bolt 63 and the fixing nut 64 do not touch the periphery 610 of the horizontal shaft bearing block 61 of the connecting device 6, but the horizontal upper wall portion 421 of the U-shaped lug 42. And in contact with the horizontal bottom wall portion 422, the associated movement between the crank 32 and the corresponding pedal rod 4 does not loosen the screw bolt 63 easily, Less noise is produced during the reciprocating motion.

Furthermore, the first crank half 322 and the second crank half 323 of each crank 32 are preferably arranged at right angles so that the force applied is effectively from each pedal rod 4 to the flywheel 3. Delivered.

4 and 8, the longitudinal sliding grooves 111 of the respective rails 11 of the base frame 1 allow the roller 41 of the pedal rod 4 to smoothly move in the longitudinal sliding grooves 111. Two inclined side walls 1111 are provided. The roller 41 of the pedal rod 4 moves in contact with the rail 11 and three contacts (one on the bottom side wall of the longitudinal sliding groove, and the other two contacts on the inclined side wall of the longitudinal axis groove). Less frictional resistance and noise are produced during the reciprocating motion of the rod 4.

The prototype of the step exerciser consists of the features of FIGS. The step exerciser works smoothly to provide all of the features described above.

Although specific embodiments of the present invention have been described in detail for purposes of illustration, various modifications and changes can be made without departing from the spirit and scope of the present invention. Accordingly, the present invention should be limited only by the claimed claims.

Claims (4)

A base frame having two parallel rails each having a longitudinal sliding groove, a front upright extending upwardly from the front of the base frame, two handles each pivoting at both sides of the front upright, and the base A flywheel supported by the front upright in the vicinity of the frame, having a central wheel shaft, a damping wheel mounted on the base frame and sharing a braking resistance to the flywheel, and coupled to opposite ends of the wheel shaft of the flywheel, respectively. Two cranks each having one end portion and the other end portion to which the cylindrical rod extending outwardly is firmly attached, and a front end portion and each pedal rod pivoting around the cylindrical rods extending outwardly of each of the cranks, respectively. Longitudinal sliding groove of one of the rails of the base frame Two pedal rods having rear ends attached to the respective rollers moving forward and backward, two footrests firmly mounted at the center of the pedal rods from above, and rear ends pivoted from the pedal rods and the handles respectively. Two links each having a front end pivoted at a lower end and a shell mounted to the upright to protect the flywheel and the damping wheel from the outside; A connecting structure is respectively coupled between the cylindrical rod of each of the cranks and the front end of each of the pedal rods, the connecting structure comprising a U-shaped lug firmly fixed to one front end of the pedal rod, and one cylindrical of the crank. A connecting device coupled to the rod, and a screw bolt and a fixing nut secured together to secure the connecting device to the U-shaped lug, wherein the U-shaped lug comprises a horizontal top wall portion, a horizontal bottom wall portion, and A smooth arc-shaped sidewall connected between the horizontal top wall portion and the horizontal bottom wall portion at the side and securely fixed to the front end of one of the pedal rods, a first pivot hole formed in the horizontal top wall portion, and the horizontal A second pivot hole formed in the bottom wall portion, said connecting device being a horizontal shaft bear coupled to a cylindrical rod of one of said cranks A vertical shaft bearing firmly connected to the ring block and the horizontal shaft bearing block and secured to the U-shaped lug between the horizontal top wall portion and the horizontal bottom wall portion of the U-shaped lug by the screw bolt and the fixing nut. And a screw bolt is inserted through the first pivot hole and the second pivot hole of the U-shaped lug and supported by the vertical shaft bearing block of the connecting device, wherein the fixing nut is A screw bolt is fixed to the connecting device to secure the screw bolt to the U-shaped lug and the vertical shaft bearing block of the connecting device, wherein the horizontal shaft bearing block of the connecting block is a round rod of one of the cranks of the U-shaped lug. The inner surface of the smooth arc-shaped sidewall of the U-shaped lug gap is received in the U-shaped lug to support the That between the step exergy that it is characterized. The crank half of claim 1, wherein each of the cranks includes a first crank half pivoted at one end of the flywheel of the flywheel, and a second crank half extending at right angles from one end of the first crank half, Each round of the crank extends at a right angle at one end of a second crank half of each crank at one side. The method of claim 1, wherein the connecting structure further comprises a step-shaped retainer fixed to the cylindrical rod of one of the cranks to secure the crank to the horizontal shaft bearing block of the connecting device. that. The step exciter according to claim 1, wherein the longitudinal sliding grooves of each of the rails of the base frame have two inclined side walls for guiding movement of one roller of the pedal rod.