[0001] The subject matter of the invention is a ski trainer (ski training simulator) provided
especially for use by individuals, allowing imitation of the skier's movements during
actual turns on the skiing slope.
[0002] During a downhill skiing, a skier performing a turn must adopt a position in which
the force resultant of gravity and centrifugal forces, passes through a surface of
snow supporting the skis, which often makes it necessary to lean the skier's body
extremely towards the centre of the turn and to generate very large muscular force
to balance the external forces affecting his body. Simulation of skiing on known ski
trainer devices, does not allow sufficient leaning of a torso and maintaining the
position over the time as being characteristic for ski turns performed at high speed
and larger radius; therefore, users' muscles engaged in performing such turns work
in a way far different from that occurring at high speed skiing. It is not possible
to develop therein a muscle strength up to the values present during real skiing;
also the distribution of muscle strength over the time does not reflect real skiing
conditions. Theoretically speaking, when using existing simulators of this kind, the
types of muscle contractions trained are different to those performed during real
skiing despite similarly looking external structure of movements.
[0003] From the Polish patent No.
PL 222648, a ski training simulator for the purpose is known which comprises a base equipped
with two parallel curved tracks of U-shaped or V-shaped cross-sections, and a railing
connected thereto, with a trolley placed on the tracks. The trolley has two foot cradles
equipped with mandrel protrusions for their swinging attachment, which cradles are
placed transversely to the direction of trolley's movement. At the top, the trolley
is equipped with a pantograph frame in form of a parallelogram. In the corners of
the frame its arms are pivotally connected - in a horizontal plane, to each other,
whereas the two opposite pantograph frame arms arranged transversely to the direction
of the trolley's movement are pivotally connected to the trolley's base. To the two
opposite pantograph frame arms arranged longitudinally to the direction of trolley's
movement the foot cradles are mounted by means of angled sleeve-pin elements allowing
two degrees of freedom.
[0004] A ski simulator known from the Polish patent application No.
PL 312283, has skis pendulously attached to a trolley. The trolley is rotatably mounted on
a slope base by means of an axle and is supported by rollers moving along an arched
guide, wherein the trolley has a bar to which the axle is attached and elastic elements
are fastened by means of quick-release clamps and lines threaded through pulleys.
[0005] From the US patent No.
US 3912260 a skiing simulator is known, which has a base plate with a rotary table rotatably
mounted thereto. The turntable contains two spaced apart vertical legs and between
them there is a pivotally mounted swingarm. A cradle supports a trolley, which is
movable along the length of the swingarm, as the swingarm rotates. Attached to the
trolley and carried by it, there is a ski mounting device. The simulator is equipped
with safety harness, that is attached around the user and connected by straps to the
legs of the simulator.
[0006] A snowboard trainer device is known from the international patent application brochure
No.
WO 2016/205463, which has a platform, sliding rail, sliding guides, basic support and front interface.
The sliding rail extends from the first end to the second end. The sliding supports
connect the sliding rail and the platform. The sliding supports are configured to
support the sliding rail against the platform. The central base is placed in relation
to the slider on the platform and positioned between the first and the second ends
of the sliding rail. The trainer has a supporting line helping the user to keep the
balance, and a return supporting string. In some embodiments the trainer may have
a harness system to support the user.
[0007] The aim of the invention is to develop a construction of a ski trainer that allows
simulation of centrifugal force that occurs when skiing at high speed.
[0008] According to the present invention the ski trainer - having a frame base with an
arched track allowing movement of a trolley thereon, the trolley having a platform
rotatably attached thereto and equipped with two parallel pivotally mounted foot cradles,
the trainer being further equipped with a user supporting harness system attached
through a belt to the trainer frame, is characterized by that the foot cradles at
the front and at the rear are equipped with rods arranged on a common axis and slidably
mounted in the through holes of the U-shaped support frames attached to the platform.
The harness includes of two resilient fasteners for simulating centrifugal force,
the fasteners being attached to the frame base at the same level, ranging from 40
÷ 60 cm above the position of the cradles.
[0009] The solution according to the invention allows for simulation of a movement structure
similar to that occurring when skiing, and also for adopting extreme body tilts that
occur when skiing at high speed. Moreover, a proper/adequate attachment of a user
to the frame base of the ski trainer, such that the position of the resilient fasteners
during the exercises is close to a horizontal position, enables the users to generate
maximum muscular strength of the legs and in response to the simulated centrifugal
force - to generate the types of muscular contractions significantly similar to those
occurring in natural conditions.
[0010] The subject matter of the invention is presented in an embodiment shown schematically
in the drawing, where Fig.
1 is a front view of the ski trainer, Fig.
2 is a top view of the ski trainer and Fig.
3 is a side view of the ski trainer.
[0011] The ski trainer has a frame body 1 and a base 2 with an arched track 3, allowing
movement of a trolley 4 thereon, the trolley 4 has a platform 5 rotatably attached
thereto and is equipped with two parallel foot cradles 6. The trainer is further equipped
with a user supporting harness system 7 attached to a belt and to the arms 9 of the
trainer body 1. The foot cradles 6 have at the front and at the rear horizontal rods
10 arranged on a common axis, which rods are slidably and pivotally mounted through
a linear bearing 11 in the through holes 12 of the U-shaped support frames 13 attached
to the platform 5. The user's harness 7 comprise two resilient fasteners symmetrically
attached to the arms 9 of the body 1, at a level of 50 cm above the position of the
cradles 6.
[0012] In order to facilitate the gradual teaching of movement technique and performing
muscular strength training, the ski trainer offers an option, not presented in the
description, to adjust the range of movements at individual degrees of freedom, i.e.
forward and backward, vertical axis turns and sideway movements in the front plane.
1. A ski trainer - having a frame body with an arched track allowing movement of a trolley
thereon, the trolley having a platform rotatably attached thereto and equipped with
two parallel pivotally mounted foot cradles, the trainer being further equipped with
a user supporting harness system attached to a belt and to the trainer frame, characterized in that the foot cradles (6) at the front and at the rear are equipped with rods (10) arranged
on a common axis and slidably mounted in the through holes (12) of the U-shaped support
frames (13) attached to the platform (5), while the harness (7) comprise two resilient
fasteners attached to the base (2) of the body (1) at the same level, ranging from
40 ÷ 60 cm above the position of the cradles (6).
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description