COLLAPSIBLE EXERCISE STEPPER

A collapsible exercise stepper contains: a base, a movable extension rack, a grip assembly, two stepping units, two hydraulic cylinders, and a folding unit. The base includes a first fixing rod and a first connection rod, and the first fixing rod has a first coupling portion. The movable extension rack includes a second fixing rod and a second connection rod with a second coupling portion and two extending tabs, wherein the second connection rod has a horizontal bar and a third coupling portion. The grip assembly rotatably includes a handle, a fitting tube, an accommodation portion, and an actuation seat. Each stepping unit includes a support plate and a pedal, wherein the support plate has a rotation portion and a driving portion. Each hydraulic cylinder includes a first joining portion and a second joining portion. The folding unit includes a first operation element and a second operation element.

FIELD OF THE INVENTION

The present invention relates to a collapsible exercise stepper which is stored easily in a small size.

BACKGROUND OF THE INVENTION

With reference toFIG. 1, a conventional collapsible exercise stepper90contains a first support rod91, a connector92arranged on a rear side of the support rod91, a second support rod93rotatably connected with the connector92by using a fixing bolt, a grip assembly94mounted on a top of the first support rod91, a connection rod fixed on a bottom of the first support rod91, two hydraulic cylinders96rotatably fitted on the connection rod, wherein two horizontal bars extend from two sides of the first support rod91respectively, the two hydraulic cylinders96are rotatable coupled with the two horizontal bars and two pedals individually.

However, the conventional collapsible exercise stepper90has defects as follows:

1. The first support rod91and the grip assembly94are locked by an adjustment screw, and the first support rod91is coupled with the grip assembly94by another adjustment screw97, but the two adjustment screws97are removable easily.

2. After the two adjustment screws97are removable, it is inconvenient to acquire the other adjustment screws for replacing the two adjustment screws97.

SUMMARY OF THE INVENTION

The primary aspect of the present invention is to provide a collapsible exercise stepper which is simplified and is connected securely.

Another aspect of the present invention is to provide a collapsible exercise stepper which is stored easily in a small size.

To obtain the above aspects, a collapsible exercise stepper provided by the present invention contains: a base, a movable extension rack, a grip assembly, two stepping units, two hydraulic cylinders, and a folding unit.

The base includes a first fixing rod and a first connection rod connected on the first fixing rod, the first fixing rod has a first coupling portion extending from a bottom thereof, the first connection rod has a first connector extending from a first side thereof, and the first connection rod has a second connector extending from a second side thereof opposite to the first side of the first connection rod.

The movable extension rack includes a second fixing rod and a second connection rod connected on the second fixing rod, the second fixing rod has a second coupling portion and two extending tabs adjacent to the two ends of the second fixing rod individually, the second connection rod has a horizontal bar inserted through a lower end thereof and a third coupling portion arranged on an upper end of the second connection rod, wherein the third coupling portion is rotatably connected with the first connector by way of a first bolt element so that the movable extension rack is rotatably coupled on the base.

The grip assembly is rotatably connected with and is erected on a top of the base so as to be held by user's hands, the grip assembly includes a handle and a fitting tube on which the handle is mounted, the grip assembly includes an accommodation portion and an actuation seat, wherein the handle is accommodated in the accommodation portion, and the actuation seat is rotatably connected with the second connector by using a second bolt element so that the grip assembly is rotatably retracted relative to the base.

Each of the two stepping units includes a support plate and a pedal, the support plate has a rotation portion formed on a front end thereof and rotatably connected with the horizontal bar of the movable extension rack, the pedal is disposed on the support plate, and the support plate has a driving portion coupling with each of the two hydraulic cylinders.

Each of the two hydraulic cylinders includes a first joining portion and a second joining portion opposite to the first joining portion, the first joining portion is rotatably connected with the two extending tabs of the movable extension rack, and the second joining portion is rotatably coupled with the driving portion of the support plate.

The folding unit includes a first operation element and a second operation element, wherein the first operation element is rotatably joined with the first coupling portion of the first fixing rod, and the second operation element is rotatably joined with the second coupling portion of the second fixing rod, such that an expansion angle and an extending distance between the base and the movable extension rack are limited.

Preferably, the first fixing rod has two first anti-slip sleeves fitted on two ends of the first fixing rod respectively, and the second fixing rod has two second anti-slip sleeves fitted on two ends of the second fixing rod respectively.

Preferably, the base and the movable extension rack are expanded to erect on a ground.

Preferably, the grip assembly has an internal tube, an external tube in which the internal tube is housed, multiple orifices defined on the internal tube and the external tube so that a positioning bolt is accommodated in two corresponding orifices of the internal tube and the external tube.

Preferably, the pedal has multiple massage bosses formed thereon.

Preferably, the first operation element and the second operation element are connected by using an affix sheet and are retracted or expanded via a shaft.

Preferably, a limitation portion is arranged on the first operation element or the second operation element so that when the folding unit is expanded, and the limitation portion limits an expansion of the first operation element or the second operation element.

Preferably, the folding unit is folded in half with a movement of the movable extension rack.

Preferably, the movable extension rack further includes a fastener configured to fasten the base with the movable extension rack.

Preferably, the first operation element and the second operation element are a rope, wherein the first operation element is connected with the first coupling portion of the first fixing rod by using a hook on an end of the first operation element, and the second operation element is coupled with the second coupling portion of the second fixing rod by way of another hook on an end of the second operation element.

Preferably, the grip assembly is rotatably connected with and is erected on the base by way of the second connector, the actuation seat, and a locking unit.

Preferably, the locking unit is a quick release element or a screw bolt.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference toFIGS. 2-6, a collapsible exercise stepper according to a first embodiment of the present invention comprises: a base1, a movable extension rack2, a grip assembly3, two stepping units4, two hydraulic cylinders5, and a folding unit6.

The base1includes a first fixing rod11and a first connection rod12connected on the first fixing rod11, wherein the first fixing rod11has a first coupling portion111extending from a bottom thereof and two first anti-slip sleeves fitted on two ends of the first fixing rod11respectively. The first connection rod12has a first connector121extending from a first side thereof, and the first connection rod12has a second connector122extending from a second side thereof opposite to the first side of the first connection rod12.

The movable extension rack2is rotatably connected with the base1so that the base1and the movable extension rack2are expanded to erect on a ground. The movable extension rack2includes a second fixing rod21and a second connection rod22connected on the second fixing rod21, wherein the second fixing rod21has a second coupling portion211extending therefrom, two second anti-slip sleeves fitted on two ends of the second fixing rod21respectively, and two extending tabs212adjacent to the two ends of the second fixing rod21individually. The second connection rod22has a horizontal bar221inserted through a lower end thereof and a third coupling portion222arranged on an upper end of the second connection rod22, wherein the third coupling portion222is rotatably connected with the first connector121by way of a first bolt element so that the movable extension rack2is rotatably coupled on the base1.

The grip assembly3is rotatably connected with and is erected on a top of the base1so as to be held by user's hands. The grip assembly3includes a handle31and a fitting tube32on which the handle31is mounted. The grip assembly32includes an accommodation portion321and an actuation seat322, wherein the handle31is accommodated in the accommodation portion321, and the actuation seat322is rotatably connected with the second connector122by using a second bolt element so that the grip assembly3is rotatably retracted relative to the base1. Referring toFIGS. 2-7, the grip assembly32has an internal tube323, an external tube324in which the internal tube323is housed, multiple orifices325defined on the internal tube323and the external tube324so that a positioning bolt is accommodated in two corresponding orifices325of the internal tube323and the external tube324, thus fixing a height of the internal tube323and the external tube324based on using requirements.

Each of the two stepping units4includes a support plate41and a pedal42, wherein the support plate41has a rotation portion411formed on a front end thereof and rotatably connected with the horizontal bar221of the movable extension rack2, and the pedal42is disposed on the support plate41. The support plate41also has a driving portion412coupling with each of the two hydraulic cylinders5. In another embodiment, the pedal42has multiple massage bosses formed thereon so as to massage user's sole and to promote blood circulation.

Each hydraulic cylinder5includes a first joining portion51and a second joining portion52opposite to the first joining portion51, wherein the first joining portion51is rotatably connected with the two extending tabs212of the movable extension rack2, and the second joining portion52is rotatably coupled with the driving portion412of the support plate41.

The folding unit6includes a first operation element61and a second operation element62, wherein the first operation element61is rotatably joined with the first coupling portion111of the first fixing rod11, and the second operation element62is rotatably joined with the second coupling portion211of the second fixing rod21, such that an expansion angle and an extending distance between the base1and the movable extension rack2are limited. As shown inFIGS. 5-7, the first operation element61and the second operation element62are connected by using an affix sheet and are retracted or expanded via a shaft63, wherein a limitation portion64is arranged on the first operation element61or the second operation element62so that when the folding unit6is expanded, the limitation portion64limits an expansion of the first operation element61or the second operation element62.

In operation, the movable extension rack2is pulled relative to the base1so that the base1and the movable extension rack2are erected on the ground, and the folding unit6is expended. Then, the grip assembly3is rotatably connected with and is erected on the base1by way of the second connector122, the actuation seat322, and a locking unit33. The locking unit33is a quick release element or a screw bolt. Accordingly, user steps the pedal42of each stepping unit4so that each stepping unit4rotates along the horizontal bar221, and each hydraulic cylinder5is pressed by the pedal42so as to push against the pedal42upward, thus stepping the pedal42repeatedly. Thereby, the collapsible exercise stepper is simplified and is connected securely.

After rotating each stepping unit4upwardly, the second joining portion52of each hydraulic cylinder5lifts, and the grip assembly3is retracted to the base1. Thereafter, the folding unit6is folded in half with a movement of the movable extension rack2. The movable extension rack2further includes a fastener configured to fasten the base1with the movable extension rack2, thus retracting the collapsible exercise stepper easily and quickly.

As illustrated inFIG. 8, in another embodiment, a first operation element61′ and a second operation element62′ are a rope, wherein the first operation element61′ is connected with the first coupling portion111of the first fixing rod11by using a hook63′ on an end of the first operation element61′, and the second operation element62′ is coupled with the second coupling portion211of the second fixing rod21by way of another hook63′ on an end of the second operation element62′, thus expending or retracting the collapsible exercise stepper easily and quickly.