Buffer structure for a jogging machine

Abstract: This invention relates to a buffer structure to be installed in between the framework (21) of jogging machine and the floor surface. The jogging machine comprises one framework (21), one front floor-rod (22), one hand holder (23) and one rear floor-rod (24). The framework (21) comprises a jogging board (26) installed on its end surface. A jogging track (27) is enclosed to surface of this jogging board (26) on its up and down end. Thus this installation can enable the user to stand on the jogging track and start jogging exercise. The key point is that there is a pulling board (30) transversely pivoted to the top end of two bent plates (28) incorporated to rear floor-rod (24). One side of the pulling board (30) has a pivot lug (31) to pivot an adjustment screw rod (32). The screw (32) rod is passed through the holes drilled on the front and rear partition boards (211,212) and a buffer pad in placed in between the front and rear partition boards (211,212). Finally one screw rod socket (34) and one knob (36) are used to bolt the screw rod together. After the buffer pad is installed, it can effectively absorb the gravity that framework is carrying. It can also lessen the reaction force fed back by floor surface, and further weaken the vibration phenomena created when framework is stressed.

Description: This invention relates to a buffer structure or damping structure of a jogging machine or treadmill, more particularly, to a buffer structure erected between the framework and the floor surface which can effectively absorb the impact that the framework is bearing. Simultaneously, it can lessen the reaction force applied back by the floor surface so that the vibration phenomena of framework can be weakened. The so-called jogging machine is a track-type indoor sport equipment. Its typical assembly has one front floor-type upright rod and one rear floor-type upright rod installed at the front-end base and the rear-end base of the jogging machine framework respectively. The jogging board can be slightly inclined by the rods and sticked to the ground (standby position before usage) when the framework is formally placed. At this time, the user can run on the jogging track to enjoy the jogging exercise. Under this condition, the jogging board and the machine framework have to carry the weight of the user and the impact generated by user's athletic movement while the machine is entertaining the user. Thus, for example, according to US patents No. 5,441,468, 5,279,528 and No. 5,454,772, etc. (as shown on Figs. 1,2,3) there is a block-type or strip-type buffer pad 12 horizontally placed either at the inner side frame 11 or on the upper surface of the machine framework. The jogging board 14 is stably placed on the buffer pads 12. Under this arrangement, buffer pad 12 will develop the effect to weaken the vibration phenomena given from the loaded framework 10 and the jogging board 14 when the jogging board is being loaded. Although the structure of the buffer pad 12 described in former patents can accomplish certain expected effects, however, there are still severe drawbacks. The buffer pad 12 will be affected by a longitudinal force up and down when the jogging board 14 is being loaded. The generated impact will pass through buffer pad 12 and will be transferred to front and rear upright rods (not shown in the Figure), and finally will reach the floor surface. Afterward, the floor surface applies a reaction force back to the framework 10 and the jogging board 14. As a result, framework 10 and jogging board 14 will surely create extremely large vibration phenomena. In other words, when the stress is demonstrating an up and down athletic state in longitudinal direction, the buffer pad 12 can only absorb small portions of the stress. It can not properly lead the stress to another place in order to lessen the influence applied to the machine body. Certainly, although it is an unavoidable fact that jogging board 14 and framework 10 will create vibration phenomena while being loaded, however, it won't puzzle the user too much. In contrast, the user will very easily feel his muscles getting tired if he is affected by too much vibrating stress while doing the exercises. In the worst case dizzy and uncomfortable symptoms occur. If these uncomfortable symptom indeed occur, then it's really a satire on this health and fitness equipment, especially because it's designed to improve the health. US-A-5 709 632 describes a curved treadmill with a support frame which may comprise a foot roller assembly. The foot roller assembly may comprises a force absorbing member which provides a means for absorbing any forces and shocks sustained while moving the treadmill from one location to the other. " In US 4 591 147 a system for selectively positioning one end of a treadmill running machine at one of a plurality of locked positions in order to provide an inclined running surface. For raising and lowering the treadmill to a desired operating position a gas spring is provided between the arms of a support assembly end the frame. In US-A-4 913 396 and US-A-5 029 801 support systems are described for adjusting the incline of an exercise apparatus such as a treadmill. The systems include a pair of linked support legs pivotally mounted on one end of the frame. In US-A-4 913 396 a length-adjustable gas spring is pivotally associated with the linked support legs and the treadmill. In US 5 029 801 one or more springs are interposed between the treadmill frame and the support assembly for urging them outwardly from each other. The orientation of the treadmill is supported by a apertures comprising strip and a displaceable plunger shaft configured to be received within the apertures of the strip. US 4 974 831 discloses an exercise treadmill including a deck assembly which is supported by a suspension system at the forward end of the deck utilizing lever arms mounted on the frame to pivot about an axis. Between the lever arms and the frame dampeners in the form of shock absorbers are connected to impart a progressively increasing damping force on the lever arms as the lever arms rotate about their pivot axis under the influence of the descending deck. US-A-5 518 471 describes a treadmill with stationary forwardly placed supporting surface engaging foot means. The incline of the treadmill tread belt is changed by rearwardly supporting surface engaging support means. The incline is changed by electrical power means or by manually operable means, e.g. gas cylinders. The main object of this invention is to provide a buffer pad structure that can appropriately and transversely lead the stress in order to largely weaken the vibration phenomena so that stress won't cause too much impact to the framework of the machine body and the jogging board. In order to more fully describe the drawings used in the detailed description of the present invention, a brief description of each drawing is provided. FIG. 1 is a schematic drawing of a buffer pad structure and its location according to the US patent No. 5, 441, 468; FIG. 2 is a schematic drawing of a buffer pad structure and its location according to the US patent No. 5, 279,528; FIG. 3 is a schematic drawing of a buffer pad structure and its location according to the US patent No. 5, 454,772; FIG. 4 is a perspective assembled view showing a preferred and practical embodiment of the present invention; FIG. 5 is a perspective explosion view showing the preferred embodiment of the invention; FIG. 6 is a side plan view showing the preferred embodiment according to Fig.5.. First of all, please refer to Fig. 4 and Fig. 5, which show that the body 20 of the jogging machine comprising one framework 21, one front upright floor-rod 22, one hand holder 23 and one rear upright floor-rod 24, etc.. The suspension strip 25 located at the inner side of the framework 21 is equipped with a jogging board 26. The jogging track 27 is fitted to a roller 271 and encloses the up and down end surfaces of the jogging board 26. This installation enables the user to stand on the jogging track 27 and start jogging. There is a pivot element 215 properly positioned at both sides of the base end surface in framework 21. The rear floor-rod 24 is pivoted by a pivot element 215, relative positioning holes 241 and 216, and the fitting bolt 29 and nut 291. Please refer to Fig.5 and Fig.6, which show two preferred and practical examples of this invention. The key point is to use bolt 282 and nut 283 to screw two bent plates 28 of the rear floor-rod through the through hole 281. There is another one pulling board 30 transversely pivoted. A pivot lug 31 is installed at the central portion of the pulling board 30 where the adjustment screw rod 32 can be pivoted by using bolt 311 and nut 312. Then the screw rod 32 is passed through the holes 213 and 214 drilled on the front and rear partition boards 211 and 212. Afterward, a buffer pad 33 and two pieces of pad 331 and 332 are places along the screw rod 32 and in between front and rear partition boards 211 and 212. Finally, one screw rod socket 34, one pad piece 35 and one knob 36 are used to position and bolt them together outside the partition board 212 of the framework 21. When the user is standing on the jogging track 27 of the framework 21 and start his jogging exercises, the gravity will be transferred downward to pass through front and rear floor-rods 22 and 24, and finally reach the floor surface 40. As the joint angle formed by rear floor-rod 24 and framework 21 is in a slant status, the gravity will be adequately and transversely led to screw rod 32. Then the buffer pad 33 assembled on the screw rod 32 will begin its work to effectively absorb the impact when the framework 21 and the jogging board are bearing the load. It can also lessen the reaction force fed back by floor surface 40. Furthermore, it can weaken the vibration phenomena caused by the framework 21 and jogging board 226 when they are loaded. The buffer pad 33 will effectively absorb the stress generated by longitudinal gravity up and down because of user's jogging movement and the reaction force fed back transversely to it from floor surface 40 by the aid of the slantly assembled rear floor-rod 24. The influence caused by stress and applied to framework is largely weakened.

Claims: Jogging machine comprising a buffer structure to be installed in between the framework of a jogging machine and the floor surface, the jogging machine further comprising one framework (21), wherein a jogging board (26) is equipped with a suspension strip (25) located at the inner side of the framework (21) and the jogging track (27) is fitted to a roller (271) and encloses surface of jogging board (26) on its up and down end, a front floor-rod (22), a hand holder (23), a rear floor-rod (24) being pivoted by pivot elements (215), the relative positioning holes (241,216) and a fitting bolt (29) and nut (291) wherein the pivot elements (215) are properly positioned at both sides of base end surface in the framework (21) characterized in that the rear floor-rod (24) comprises two bent plates (28), which are pivotally connected to the framework (21), a pulling board (30) is transversely pivoted between the bent plates (28) above the connection between the bent plates and the framework (21) and an adjusting rod (32) is pivotally connected to the pulling board (30) wherein the adjusting rod (32) can be fixed in different positions so that the declination of the rear floor-rod (24) can be adjusted. Jogging machine according to claim 1, characterized in that the joint angle formed by rear floor-rod (24) and framework (21) is inclined. Jogging machine according to claim 2, characterized in that a bolt (282) and a nut (283) are used to screw the two pieces of bent plates (28) of the rear floor-rod (24) through a through hole (281), provided in the bent plates (28). Jogging machine according to claim 2 or 3, characterized in that a pivot lug (31) is installed at a central portion of the pulling board (30) where the adjustment rod (32). can be pivoted by a bolt (311) and a nut (312). Jogging machine according to claim 2 to 4, characterized in that the adjusting rod (32) is a screw rod which is fixed and adjusted by a screw rod socket (34) and a knob (36). Jogging machine according to claim 2 to 5, characterized in that the adjusting screw rod (32) is passed through through holes (213,214) provided in a front partition board (211) and a rear partition board (212) of the framework, and damping elements are placed along the screw rod.

Inventors: WANG LEAO, WANG, LEAO
Applicants: WANG LEAO, WANG, LEAO
Application year: 1999
Main classification: A63B22
IPC codes: A63B22