MOVING LENGTH ADJUSTMENT DEVICE OF A TREADING TRAINER

Abstract

A moving length adjustment device of a treading trainer comprises a treading trainer having two treadles; each treadle indirectly connected to a rotary shaft; the rotary shaft connected to a linkage plate; each linkage plate being formed with a via hole; each linkage plate being indirectly connected to a stand rod; the stand rod being formed with a transversal screw hole; and a T shape linkage having a pin shaft at a front end thereof; each of two lateral sides of the T shape linkage having a respective universal adaptor. Further, the T shape linkage can be replaced by a retaining frame, a guide wheel and a steel rope winding around the guide wheel; and a front end of the steel rope having a pin shaft.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural view of the present invention.

FIG. 2 is another structural view of the present invention.

FIG. 3 is a schematic view showing the application of the present invention.

FIG. 4 is a schematic view showing the operation of the present invention.

FIG. 5 is a further structural view about another embodiment of the present invention of the present invention.

FIG. 6 is another schematic view showing the application of the structure in FIG. 5.

FIG. 7 shows the arrangement of the cylinder of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.

Referring to FIG. 1, the moving length adjustment device of a treading trainer according to the present invention is illustrated. The present invention has the following elements.

A treading trainer 1 has two treadles 11. Each treadle 11 is indirectly connected to a rotary shaft 12. The rotary shaft 12 is connected to a linkage plate 13. The linkage plate 13 is formed with a via hole 131. Each linkage plate 13 is indirectly connected to a stand rod 14. The stand rod 14 is formed with a transversal screw hole 141. A driving cylinder 15 (a pneumatic cylinder or an oil pressure cylinder 15) serves to provide resistance forces to the treadles 11. This is well known in the prior art, and thus the detail will not be described herein.

A T shape linkage 2 has a pin shaft 21 at a front end thereof. Each of two lateral sides of the T shape linkage 2 has a respective universal adaptor 22.

In assembly, the pin shaft 21 of the T shape linkage 2 inserts into the screw hole 141 of the stand rod 14. The universal adaptors 22 of the T shape linkage 2 are connected to the via holes 131 of the linkage plates 13. A screw rod 3 inserts into the screw hole 141 from the front end thereof. Thus the assembly of the present invention is complete (referring to FIG. 2).

In use of the treading trainer 1 of the present invention, since the two treadles 11 are connected to the T shape linkage 2 through the universal adaptors 22. When the treadles 11 move upwards and downwards, the linkage plates 13 will move forwards and backwards so that the T shape linkage 2 swings. The angle variations of the linkage plates 13 are cancelled by the angle variations of the universal adaptors 22 (referring to FIGS. 3 and 4). Therefore, when the screw rod 3 is loosed so that the T shape linkage 2 moves forwards and backwards, the swinging space of the treadles 11 is reduced. Thus, the moving length of each treadle 11 is reduced. On the contrary, when the screw rod 3 is inserted into the screw hole 141 again to push the pin shaft 21 backwards at another end of the screw hole 141. Then the moving length of the treadle 11 will increase so as to achieve the object of adjusting the moving length. Since the screw rod 3 is at the front end of the stand rod 14, the user can adjust the moving length in time and quickly.

Further in the present invention, the moving length adjustment device 20 of the present invention can include a retaining frame 23, a guide wheel 24 and a steel rope 25 winding around the guide wheel 24 (referring to FIGS. 5 and 6). A front end of the steel rope 25 has a pin shaft 21. The pin shaft 21 of the moving length adjustment device 20 inserts into the screw hole 141 of the stand rod 14. Two ends of the steel rope 25 are engaged to the two via holes 131 of the two linkage plates 13. By the interaction of the steel rope 25, the moving space of the treadles 11 will be limited. By adjusting the insertion length of the screw rod 3, the moving length of the treadle 11 is adjusted. In this embodiment, since the guide wheel 24 is pivotally installed to the retaining frame 23, and is wound around by the steel rope 25 which are engaged to the linkage plates 13, the retaining frame 23 is stable. Thus the lifetime of the structure is prolonged.

Moreover in general treading trainer 1, a pneumatic cylinder or an oil pressure cylinder 15 serves to install at the seat at a lower sides of the treadles 11 and two sides of the stand rod 14. However in the present invention, as necessary, the cylinder can be installed at the linkage plates 13 and a center seat (referring to FIG. 7) so that when the treadles 11 move upwards and downwards, the cylinder 15 can be driven to move reciprocally.

The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.

Claims

1. A moving length adjustment device of a treading trainer comprising: a treading trainer having two treadles; each treadle indirectly connected to a rotary shaft; the rotary shaft connected to a linkage plate; each linkage plate being formed with a via hole; each linkage plate being indirectly connected to a stand rod; the stand rod being formed with a transversal screw hole; anda T shape linkage having a pin shaft at a front end thereof; each of two lateral sides of the T shape linkage having a respective universal adaptor; andwherein in assembly, the pin shaft of the T shape linkage inserts into the screw hole of the stand rod; the universal adaptors of the T shape linkage are connected to the via holes of the linkage plates; a screw rod inserts into the screw hole from the front end thereof.

2. A moving length adjustment device of a treading trainer comprising: a treading trainer having two treadles; each treadle indirectly connected to a rotary shaft; the rotary shaft connected to a linkage plate; each linkage plate being formed with a via hole; each linkage plate being indirectly connected to a stand rod; the stand rod being formed with a transversal screw hole; anda retaining frame, a guide wheel and a steel rope winding around the guide wheel; a front end of the steel rope having a pin shaft; andwherein in assembly, the pin shaft of the moving length adjustment device inserts into the screw hole of the stand rod; two ends of the steel rope are engaged to the two via holes of the two linkage plates.