JP2729654B2 - Treadmill equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treadmill device, and more specifically, to a treadmill device having a trampoline-like surface, having a plurality of peripheral portions supported by springs, and The present invention relates to a treadmill device that is flexible enough to minimize shock when the foot contacts the treadmill surface, but rigid enough not to hinder normal running and walking.

2. Description of the Related Art Treadmills employ endless belts so that each person can run or walk in place. The treadmill device is useful not only for exercise purposes but also for medical tests such as those found in stress tests in rehabilitation programs. There is also a demand for treadmill devices in indoor health clubs. This is because many clubs are unable to build a running track and use a treadmill device to perform an appropriate exercise program.

Traditionally, treadmills have been provided with a thin endless belt, configured to move on a support surface such as a metal plate. This belt supported the weight of each person exercising. The belt having such a structure had large wear due to friction between the plate and the belt. The metal support plate forms a hard surface, which may cause various types of damage to the human body. For example, sprints and shin splints. Another method of supporting the belt is to provide a roller below the belt. Such a structure is not desirable as a whole because the roller forms an uneven moving surface.

Exercising on a treadmill apparatus having a rigid support surface under the belt is similar to exercising on a regular rigid surface. This is because every step takes an impact on the feet of the exercising person. This unnecessarily damages the foot, and causes a trouble of the foot for a jogger or the like. This problem is particularly acute for patients undergoing rehabilitation programs.

Several treadmill devices are the subject of U.S. patents. U.S. Patent No. 2,315, issued April 6, 1943,
485 is entitled "exercise equipment", with a moving belt,
Fig. 3 shows an exercise device with end rollers supporting the belt at its ends and adjusting means for changing the tension of the belt.

U.S. Pat. No. 921,755, issued May 18, 1909, shows a treadmill-type device consisting of a plurality of cross-slats, each having a wear-resistant roller. Patents showing other treadmill devices include:
U.S. Pat.No. 3,628,654 "Vacuum belt conveyor", U.S. Pat. and so on.

Applicant filed U.S. Patent No.
4,548,405 owner. This patent is entitled "Treadmill with Trampoline-Like Surface", in which the belt surface of the treadmill is supported by lateral edges and has springs and is located between the front and rear rollers.

The present invention is an improvement over the structure disclosed in these prior patents in which a pair of springs are spaced apart and angled to support the lateral edges of the belt both laterally and longitudinally with the springs. It is assumed that. These springs contact the belt at a remote location. Further, the present applicant's invention aims to provide a treadmill device capable of utilizing a secondary surface. This secondary surface is spaced apart below the top surface of the belt to limit vertical deformation of the belt during use. The secondary surface maintains the stability of the belt when used by very heavy or heavy exercisers.

SUMMARY OF THE INVENTION In a treadmill apparatus according to the present invention, the design of a vertically deformable surface eliminates the need to directly reinforce the surface under a belt. The surface of the support belt is flexible enough to perform the function of a shock absorber, so that the rider or pedestrian does not hurt the foot, and at the same time has sufficient rigidity to stabilize the surface of movement Things.

In the treadmill device embodying the present invention,
The top part of the endless belt is formed on a flat surface so that each person can be supported. The lateral support extends along the edge of the endless belt and continuously supports the endless belt. The belt is supported by a pair of continuous rails and has a spring assembly. These rails extend along the lateral edges of the endless belt and are remote therefrom. In one embodiment, the bent end of the belt is formed by a bent portion of the rail. The edges of the belt are each connected to the rail via a plurality of pairs of coil springs. Each pair of coils
The springs are held by roller brackets, and each pair is connected by a belt at a distance. The roller bracket is rotatably engaged with and moves on the rail. In a preferred embodiment,
A roller bracket assembly slidably engages each rail and faces the edge of the belt. roller·
The brackets are connected along the belt at remote locations, each bracket holding a pair of springs.
The springs extend at an angle from one another from the bracket and are located at spaced locations along the edge of the belt. This improved spring arrangement will hold the belt edge both longitudinally and laterally, increasing the stability of longitudinal and lateral retention. This improved spring arrangement also provides longitudinal and lateral support for the roller bracket and ensures alignment with the rail.

In a preferred embodiment, the treadmill has a peripheral support, which is spaced apart from and extends along the side of the endless belt and at each end of the endless belt. It has curved support portions on both sides. In this embodiment, two separate rollers are mounted on each roller bracket mounted inside the support rail, and at each bracket make an angle of 90 ° to the load supporting roller. .
These additional rollers engage the curved support at each end to ensure alignment of the load support rollers with the support rails and provide continuous support at each end of the endless belt as in the previous embodiment. There is no need to provide rollers. A number of springs are paired and arranged at an angle to each other to apply tension to the belt both laterally and longitudinally. At each location where such tension is applied, a pair of springs is provided on the endless belt. Preferably, two springs are separated from each roller bracket, for example with respect to the longitudinal axis of the belt.
Install so that it extends at a 45 ° acute angle. In this way, the tension between the load component in the vertical direction and the load component in the horizontal direction is given to each spring.

In a preferred embodiment, the treadmill device has at least one drive roller and drives the belt by frictional contact between the inner surface of the belt and the drive roller.

Also, in a preferred embodiment, the drive rollers are mounted on a rotating shaft. This shaft is provided with a pair of gears. These gears are located on either side of the drive roller and support the belt around it.

In one embodiment of the device, a secondary surface is located below the belt to limit vertical deformation of the belt during use. For example, it limits the amount of downward movement of the belt when used by heavy people.

In another example of the device of the present invention, the belt is divided into a plurality of parts, each of which is connected by a tension member. For example, they are connected by a tension means such as a coil spring or an elastic member to move a tension load between edges of adjacent belt portions.

Description of Illustrative Examples In order to further clarify the nature, objects, and effects of the present invention, a detailed description is given with reference to the drawings. Like reference numerals indicate like parts.

FIGS. 1 and 2 generally indicate the preferred embodiment of the apparatus of the present invention by the numeral 10. FIG. FIG. 1 shows a plan view of a treadmill device 10 of the present invention, in which a frame 12 supports a pair of roller assemblies 13, 14 (dashed lines).

The endless belt 15 is used by pedestrians and runners.
It is supported to stand at 15A. As the belt 15 moves in the direction of the arrow 16 in FIG. 1, the runner or pedestrian can walk or run on his or her own like a treadmill and maintain a certain position. However, in the present invention, a cushioned trampoline-like surface 15A is provided, and the peripheral portions 17, 18 of the belt 15 are supported by a plurality of spring assemblies, as will be described in more detail below. The belt can be made, for example, of a plastic woven fabric or the like, which is commonly used to produce trampoline surfaces. Alternatively, a laminated belt having a foam layer between two layers of plastic woven fabric can be used.

A pair of continuous rails 19, 20 are provided on both sides of the belt 15 and spaced apart therefrom (FIGS. 1 and 2). These rails have a top 19A and a bottom 19B, with a semicircular section 19 at the front and rear ends.
C (FIGS. 4 and 6). The rail 10 has the same shape.

Each rail 19, 20 is provided with a plurality of roller brackets 21 for movement (see FIGS. 5 and 6). Each roller bracket has a bracket frame 22 made of a suitable structural material such as stainless steel. The bracket 21 supports a number of rollers including a vertical roller 23 and a horizontal roller 25 installed on a vertical shaft 24. In the preferred embodiment, a pair of horizontal rollers 25 are shown. Each horizontal roller 25 is mounted on a corresponding horizontal shaft 27,28. The bracket has a structural cross section as shown in FIG. 5, with vertical portions 29,30 supporting shafts 27,28,
The innermost inwardly directed horizontal flange portion 31 has at least one hole 32 in which coil springs 33,34 are set. Further, the bracket 21 is provided with a flat horizontal portion 35 at the top and a horizontal portion 36 at the bottom, and extends outward from the rails 19 and 20 and the vertical flange 37. The roller bracket 21 can utilize a single vertical roller 23. The bracket 21 is generally C-shaped and has a vertical flange 22A and a horizontal flange 21A.

FIG. 19 shows a modification of the roller bracket 22. The bracket is adjustable and the spring 3
Stretch and relax 3,34 as needed
Increase or decrease 15 tensions. In the embodiment shown in FIG. 19, the roller bracket frame portion 22A is
Has 2B and 22C. Each bracket member is provided with a slot 22D so that the members 22B and 22C can be tightened by bolts 22E. The lower flange 36A is L-shaped and holds a roller 25A which abuts against the bottom of the rails 19,20.

A flat semicircular portion 40 (6th
Figure) is provided. The flat rail section 40 has a flat outer curved surface 41 having a curvature similar to that of the rail section 19C as shown in FIG. The horizontal roller 25 is set on the flat surface 41 so that the roller engages with the surface 41 and moves. At the end of the flat rail portion 40, slope portions 42 and 43 are provided as shown in FIG. 6, so that the roller 25 can be easily fitted to the surface 41.

The springs 33 and 34 are mounted on the roller bracket 21 with the horizontal flange 31. The springs 33, 34 are mounted at two separate positions on the mat 15, in particular on its peripheral edges 17, 18. First
As shown in FIGS. 2 and 3, each roller bracket 21 holds a pair of springs 33 and 34, each of which is attached to a grommet hole, and is disposed at, for example, a separated position (first to second). (See the figure with the number 50). With this arrangement, each spring 33, 34 is at an acute angle (eg 45 °) to the mat edges 17, 8 and each spring is
The edges 17 and 18 apply tension in the vertical and horizontal directions.
In another example (FIG. 20), three springs are provided, of which two springs 33 are the lateral edges 17, 18 of the mat 15.
The third spring 34 is set at an acute angle
Set at right angles to 7,18. 18A, 18B and 21, the bias woven mat 15E has flexible woven members 15F and 15G.
These members are woven approximately at right angles to each other (FIGS. 18A, 21) and are preferably woven at 45 ° with respect to the matte edges 17,18. In FIG. 18B, the woven fabric members 15F, 15G are at an acute angle to the lateral edges 17, 18. The bias woven flexible mat 15E allows the use of tensionless connection members such as wire loop 33A.

In one embodiment (FIG. 1), the mat 15 is configured in the form of a pair of separate mat sections 15C, 15D,
Upper surfaces 15A and 15B are provided on each of them so that a foot of a runner or a pedestrian can be put thereon. The spring 33A joins the mats 15C and 15D. As will be appreciated by those skilled in the art, the use of rollers 13, 14 is optional. This is because the support of the mat 15 on the peripheral edges 17 and 18 is provided by the roller assembly 21 and the coil springs 33 and 34 (also at the ends 19C and 20 of the rails 19 and 20 as described above). . The rollers 13 and 14 can be rotated by, for example, being electrically driven as necessary. 3 to 3A, the roller bracket 21A does not have a horizontal roller 25. The brackets 21A may be used to configure the end rollers 13, 14 to support the ends of the mat 15 instead of the flat rail sections 40.

In the example of FIGS. 7-8, the mat edges 17, 18 are supported by a shock assembly. Each shock assembly upright link 61 is provided to allow pivot support 62 to pivot inward. Reinforcement members
63 extends around the bottom of the rail sections 19B, 20B. A shock absorber 70 in the form of a coil spring is supported at this end by spring sockets 71, 72 and a rail section 19, 2
Supports 0. On the other hand, when the leg L of the runner or pedestrian presses the upper surface 15B of the mat 15, the size constant of the spring 70 determines the inward flexibility of the mat, as indicated by the arrow in FIG.

9 and 10, a secondary surface 70 is provided.
For example, it comprises an upper surface 72 without friction, an intermediate cushion surface 73 made of foam, and a lower structural surface 74 made of metal or wood. The mats 15C and 15D can be connected by a spring 33A covered by a cylindrical hose-shaped sleeve 33B.
Raise or lower the secondary surface 70 using a pair of shock assemblies 75, 76 supported by the frame,
5 The degree of downward vertical deformation can be limited.

11 and 12 specifically show the structure of the rollers 13 and 14. FIG. It has a cylinder 13A, a drive shaft 13B, and an outer foam or other flexible material surface 13C. The end rollers 13D, 13E can extend upward, and the mat 1
5 and its edge surfaces 17, 18 are adapted to fit.

FIG. 22 shows another modified structure indicated by numeral 100.
A laterally disposed cantilever support 103 is located below the belt 15. The belt 15 is supported at one end by a roller 101 and at the other end by a plurality of tension rollers 104-106. The rollers 104 to 106 are disposed on support brackets 108 and 109, respectively. These support brackets are attached to the superstructure 110 of the frame 102. Tension spring 107 is bracket 108
And the bracket is rotatably disposed on the superstructure 110. The support 103 is in the form of an elongated cantilever and has only one end fixed to the bulk head 114.
The opposite free end 103A is freely deformable when a runner or a pedestrian runs or walks on the surface of the belt 15. Superstructure
110 holds an upper fixed roller 111 and a lower movable roller 112. A spring 113 is attached to the frame 102 and connects the other end to the roller 112. Endless belt 114
Is connected between the rollers 111 and 112 so that the tension of the spring 113 can regulate the tension of the belt 114. Bulk head 116 is slidable up and down. It is connected to the bracket 118 by bolts 115. The bracket 118 is supported by a spring 113. In use, the rider deforms the support 103 in an arc shape and downward (by the compression spring 113). During use, the end 103A of the support 103 is deformed and bent. This creates a synthetic deformation that can be adjusted by the shape of the support 103, the flexibility between its ends, and the constant of the spring 113. When the exercising person comes into contact with the endless belt 15 moving on the rollers 101, 104 to 106, a considerable shock absorbing feeling is obtained by the deformation of the vertically arranged coil spring 113 and the deformation of the elongated support 103. When the support 103 returns to its normal open state, the exerciser feels levitation during the acceleration phase.

FIG. 23 shows another embodiment of the present invention, designated by the numeral 120. In FIG. 23, the horizontal support 125 is
Is located below. The support 125 is flexible and is supported by a plurality of coil springs 126-136. The endless belt uses this end with rollers 121 and 122.
And the frame 123. In the example of FIG. 23, the horizontal space between the plurality of springs can be changed. Therefore, the return of the spring applied to the foot is variable depending on the position of the foot. The belt 15 can be set at various horizontal positions in order to make the shock absorber characteristics appropriate according to the needs of the runner or pedestrian. Further, while changing the spring rate, the spring 126
It is also possible to arrange ~ 136. FIG. 24 shows an example of a “banana” -shaped device with the numeral 150, with bends at 153,154. As the foot reaches the ascent, toward the roller 152, the lift power available from the springs 33-35 and the mat increases. This is because it is far from the normal open state. The leg of the person who is exercising is lifted (or raised) to the point of higher disengagement point (during the acceleration phase).

13 to 16 show an improved handrail structure used in the device of the present invention. The frame 12 has a front stand 80 on which a pair of hand rails 81 and 82 are provided separately. These hand rails are mounted on the platform 80 using rotary bearings 83,84. Each hand rail 81, 82 has a top rail 85, a bottom rail 86, and a connection rail 87, and defines a handle (see FIG. 16) for the user to grip. The angle A between the lower rail 85 and the handle 87 is preferably 15
Choose between ゜ and 45 ゜. This angle A is indicated by the letter "A" in FIG. Treadmill 10 on handle 17
Numerous switches for operating the on / off switch
A switch 89, a speed switch 90, an up switch 91 for controlling the inclination angle of the treadmill 10 and the like are provided. The front caster 92 expands and contracts to raise and lower the front end of the frame 12 so that the inclination angle of the running surface defined by the belt 15 can be changed. The instrument panel 93 is rotatably mounted on a crossbar 94 connecting the handles 81 and 82. Instrument panel 93 is provided with a graphic display showing distance, time, pace (minutes / miles, etc.) and any other desired parameters.

As shown in FIG. 14, since the two handles 81 and 82 are separated, the runner or the pedestrian can occupy the position between the two handles 81 and 82 and hold the handle 87. As the handle rotates on the rotary bearings 83 and 84 to arrive at a plurality of positions, the handle can be raised or lowered to adjust to persons of various heights, as shown in FIG. In addition, the lowest position of the handle can be used for shipping purposes as shown in FIG. By providing a stopper, the handles 81 and 82 can be fixed at desired height positions. As shown by an arrow 95 in FIG.
(At an angle between ゜ and 90 °) so that the graphic display can be rotated to a position that is easy for a particular user to see. The bearings 83 and 84 may be provided with spring counterbalances so that even the child can easily lift the handles 81 and 82. These handles are
It is common to be 30 inches to 35 inches apart.

FIG. 14 shows a state in which the hand rails are rotated left and right to change their distance. This is done by placing the hand rail on hinge pins where the end of the hand rail joins the common cross member. Cross (eg, 6 inches) from the center of the hinge pin limit stop, increasing 4 ° to 5 ° away
A bracket on each side of the member engages each hand rail. This allows each hand rail to rotate about 20 °. The cross member also pivots to adjust the height of both hand rails, providing an installation platform and wire passage for the control panel.

In another embodiment 160 shown in FIG. 25, an elastic mat 161 is fixed to a transporter bracket 163 by, for example, rivets 164. Each of the plurality of transporter brackets 163 has a curved portion 167 and a screw hole 170 for a bolt 169.
The endless band 168 can be made of plastic or the like, and the band 168 follows the endless belt 15 when viewed from the side. Band 168 has an inwardly facing recess 172.
The frame 162 has a continuous concave rail portion 165 where it supports a ball bearing 166 as an interface between the rail 165 and the endless band 168.

In view of the fact that numerous modifications can be made to the preferred embodiment described above without departing from the scope or spirit of the invention, the foregoing configuration is illustrative only and not limiting.

[Brief description of the drawings]

FIG. 1 is a top view showing one embodiment of the device of the present invention. FIG. 2 is a top view showing a preferred embodiment of the apparatus of the present invention. FIG. 3 is a partial sectional view showing one embodiment of the device of the present invention. FIG. 3A is a partial sectional view showing a preferred embodiment of the device of the present invention. FIG. 4 is a partial sectional view showing a preferred embodiment of the apparatus of the present invention. FIG. 5 shows the roller bracket assembly in an elevational view of a preferred embodiment of the apparatus of the present invention. FIG. 6 shows a roller bracket assembly in a perspective view of a preferred embodiment of the apparatus of the present invention. FIG. 7 is an elevation view showing another embodiment of the apparatus of the present invention. FIG. 8 is a sectional view showing a use state of another embodiment of the device of the present invention. FIG. 9 is a cross-sectional view of a preferred embodiment of the apparatus of the present invention, showing a secondary support surface portion. FIG. 10 is a cross-sectional view of a preferred embodiment of the device of the present invention, showing the secondary support surface. FIG. 11 is a partial view showing the gear portion and the drive shaft on the side of the drive roller assembly. FIG. 12 is another partial view of the drive roller assembly showing the gears, drive rollers and foam cover. FIG. 13 is an elevation view of one embodiment of the device of the present invention, showing an improved handrail structure. FIG. 14 is a plan view of the embodiment of FIG. FIG. 15 is a partial view of the embodiment of FIG. FIG. 16 is a partial top view of the embodiment of FIG. FIG. 17 is a schematic elevation view showing a belt tension mechanism. 18A and 18B are schematic top views showing another bias woven mat used in the device of the present invention. FIG. 19 shows another adjustable holding part in a partial view of the device according to the invention. FIG. 20 is a schematic enlarged plan view of a preferred embodiment of the device of the present invention, showing in detail the shapes of the spring and the transporter. FIG. 21 is a schematic enlarged plan view showing another tensionless connection member used for the bias woven mat. FIG. 22 is an elevation view showing another embodiment of the device of the present invention. FIG. 23 is an elevational view of another embodiment of the device of the present invention, showing an example of arrangement of coil springs for supporting a mat. FIG. 24 is a view showing another embodiment of the device of the present invention, and shows the shape of the deformed upper mat surface. FIG. 25 is a schematic partial view showing another embodiment of the transporter portion of the present invention. 10 Treadmill 13, 14 Roller assembly 12 Frame 15 Endless belt 19, 20 Rail 21 Roller bracket 23 Roller 24 Shaft 25 Roller 27 28 …… Shaft 33,34 …… Coil spring

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Joffrey O. Meredith USA 77089 Texas, Houston, Sage Trial Drive 10818

Claims (24)

(57) [Claims] 1. A treadmill device for supporting a pedestrian or a runner having a longitudinal axis having a longitudinal axis along a belt moving direction during use and having the following configuration. . a) Frame. b) The endless belt, which is mounted for movement relative to the frame and has substantially parallel transverse edges, has a top surface forming a substantially flat moving surface. c) The frame is provided with fixed lateral edge support means spaced from and extending along both sides of the endless belt, the front and rear ends of which are curved ends. d) movably engaging with and moving along the lateral edge support means and connecting the lateral edge of the endless belt to the fixed lateral edge support means so that the endless belt is Transporter means adapted to support a lateral edge along a plane of motion when moving. e) the transporter means has a plurality of sections that can follow the lateral edge support means independently of each other, and the transporter means can pivot at the bent end of the lateral edge support means. f) connecting means for connecting the lateral edges of the belt to the transporter means, which move together with the belt and the transporter means, at a plurality of locations along the belt at a plurality of spaced locations along the transporter means; Having a tension means for giving an acute angle tension to the lateral edge of the
When the tensioning means applies tension to the belt both laterally and longitudinally at its lateral edges, and when a runner or pedestrian runs or walks on the endless belt at a predetermined position with respect to the frame as the belt moves. Maintaining, at least in part, the stability of the sections of the transporter means with the lateral edge support means in both the longitudinal and lateral directions. 2. A treadmill apparatus according to claim 1, wherein the connecting means comprises a plurality of roller brackets mounted for movement on the lateral edge support means. 3. The treadmill device according to claim 1, wherein the endless belt is a bias woven mat. 4. A mat according to claim 3, wherein the mat has first and second woven fabric sections, which are oriented at about 90 ° to one another and are at an acute angle to the transverse edge of the belt. Treadmill equipment. 5. The treadmill apparatus according to claim 2, further comprising at least one drive roller, wherein the belt is driven by frictional contact between the drive roller and an inner surface of the belt. 6. The treadmill according to claim 3, further comprising a shaft connecting the drive roller to the frame. 7. The treadmill of claim 4, further comprising a plurality of gears on the shaft, spaced apart from each other and located on each side of the drive roller. 8. The invention of claim 1 wherein the lateral edge support means comprises a pair of continuous rails connected to the frame and extending along each edge of the endless belt. Treadmill equipment. 9. A plurality of spaced apart brackets are roller bracket assemblies, the rollers engaging rails, and a pair of springs extending from each bracket at an angle to each other, each of which includes a belt. 7. The treadmill device according to claim 6, wherein the treadmill is configured to be connected to the lateral edge of the belt at a remote position above. 10. The treadmill device according to claim 9, wherein each spring is a coil spring connected between each bracket and the belt. 11. The treadmill device according to claim 1, wherein the secondary surface device is provided below the belt surface to limit vertical deformation of the belt during use. 12. The apparatus according to claim 11, wherein the secondary surface device is an elongated platform supported at one end, and is not supported except at its end, and is deformable along its length. Treadmill equipment. 13. The treadmill device according to claim 11, wherein the secondary surface device has an upper surface having a low coefficient of friction. 14. The endless belt according to claim 13, wherein the secondary surface device has a plurality of coil springs arranged horizontally apart and transmits various load transmission characteristics to the endless belt at different horizontal positions. The treadmill device as described. 15. The treadmill device according to claim 11, wherein the secondary surface device has a vertically movable portion, and the distance between the belt surface and the secondary surface can be changed. 16. The treadmill device of claim 11, wherein the secondary surface device has a rigid support layer, a flexible foam layer, and a low coefficient of friction top surface. 17. The treadmill according to claim 1, wherein the belt is divided into a plurality of portions, and a tension means for applying tension to an adjacent belt portion is provided. 18. The belt cover moves with the belt,
The treadmill device according to claim 1, wherein the treadmill device extends across the belt and the tensioning means. 19. The treadmill apparatus according to claim 1, wherein each bracket has a plurality of rollers, at least one of the rollers engaging the outer surface of the rail at a location opposite the belt. 20. In order to maintain the belt in a substantially semicircular bent shape near the front and rear portions of the belt, a second roller is held on a bracket and is disposed substantially between the rail and the mat, and is bent. A curved rail surface is formed at the front and rear portions of the belt so as to receive the second roller held by the bracket,
20. The treadmill device according to claim 19, wherein the second roller engages with a bent rail portion at the front and rear portions of the belt. 21. The treadmill device of claim 11, wherein the jack is located below the secondary surface and is configured to raise and lower the secondary surface with respect to the belt. 22. The shock absorber means for forming a shock absorber type connection between the frame and the lateral edge support means such that each upper edge portion of the belt is capable of inwardly deforming during use. 2. The treadmill device according to 1. 23. The treadmill device of claim 22, wherein the shock absorber means comprises a plurality of rows of springs located below a top surface of the belt. 24. A treadmill having the following structure. a) Frame. b) Endless belt mounted so that it can move to the frame. c) a pair of handles located at the front end of the frame and extending rearward on either side of the frame along each peripheral edge of the belt are spaced apart from each other, each handle having a grip portion; At an angle of between 15 ° and 45 ° to the horizontal, each handle is rotatably connected with respect to the frame, and the frame has a platform extending upwardly from the treadmill surface, and each handle is mounted on the platform. Being installed in the upper part.