Modular trainer system

Abstract

A multi training system comprising a support frame couplable to a resistance unit having a power axle and a power wheel, a pull wheel mounted via a pull wheel axle to the support frame, a transmission drive for power transmission between the pull wheel and the power wheel, a pull cord secured at one end to the pull wheel and to a cord puller at a free end of the pull cord, an elastic element elastically coupling between the pull wheel axle or the support frame and the pull wheel to restore an angular position thereof after each pulling and spool the pull cord back onto the pull wheel, and an attachment mechanism provided at end portions of two connection arms of the support frame and configured to mechanically couple one of the arms to the power wheel of the resistance unit and the other arm to the power axle of the power wheel.

Description

[0001] MODULAR TRAINER SYSTEM

[0002] TECHNOLOGICAL FIELD

[0003] The present disclosure is concerned with a modular training system.

[0004] BACKGROUND

[0005] Exercise equipment has evolved significantly over the years to meet diverse training needs while accommodating space limitations in both commercial and residential settings. Particularly relevant to this disclosure are modular and convertible exercise systems that can provide multiple training modalities within a single apparatus.

[0006] Direct drive bicycle trainers have become popular for indoor cycling, offering users the ability to train with their own bicycles by mounting the bicycle's rear dropout directly to the trainer after removing the rear wheel. These trainers typically include a resistance unit, which may employ electromagnetic, mechanical, or air resistance mechanisms to simulate outdoor riding conditions. The integration of smart technology in these trainers has further enhanced training experiences by enabling variable resistance control, performance metrics tracking, and compatibility with virtual training applications.

[0007] Rowing machines represent another important category of exercise equipment, providing full-body workouts with low impact on joints. Traditional rowing machines utilize various resistance mechanisms including air, magnetic, water, or hydraulic systems. Some designs incorporate adjustable resistance levels.

[0008] While both bicycle trainers and rowing machines have proven effective for their respective training purposes, they typically require separate pieces of equipment, consuming considerable space and involving significant financial investment when both training modalities are desired.

[0009] The concept of converting existing exercise equipment for alternative training purposes has gained attention in the fitness equipment market. For example, some manufacturers have developed attachments that can transform bicycle trainers into rowing machines or other exercise apparatus. However, many of these conversion systems suffer from compromised functionality, limited resistance control, or inadequate user interface systems compared to dedicated single-purpose equipment. US2022362623 discloses a rowing machine that permits a rower to adjust the rowing resistance using a gear shift mechanism. The rowing machine includes a handle connected to a chain, which passes, sequentially, over a derailleur and then to the gears of the gear cassette. The gear cassette is coupled to a resistance unit, which may be similar to resistance units used in off wheel bicycle trainers. This configuration of derailleur and gear cassette permits the rower to smoothly select a gear.

[0010] CN212491340U discloses a multifunctional comprehensive trainer which comprises a main frame body, a bicycle assembly, a sailing boat assembly and a rowing assembly. A bicycle assembly is arranged on one side of the main frame body, a rowing assembly is arranged on the other side of the main frame body, and the sailing boat assembly is located on the uppermost portion of the main frame body. The multifunctional fitness equipment reasonably integrates a bicycle, a rowing machine, a sailing boat machine and a skiing machine together, provides multiple fitness modes for a body builder, achieves multiple purposes, and well meets market requirements. The problem that the length and the size are increased by combining multiple training modes is solved to the greatest extent, although the size and the length are increased compared with those of a single product, extreme compression is achieved, and the space design is reasonable.

[0011] US4789153 discloses an exercising apparatus comprising a flywheel-type energy storage and fan-type resistance load applying system which is connectible to a variety of human force input systems such as a leg-operated bicycle-type system, a hand operated rowing-type system, etc. through a chain-type drive system which may include multiple speed and force multiplying and force controlling devices.

[0012] Other training system configurations are disclosed in patent publications Nos. EP3563912, US5020792, US2022362623, CN212491340U and US2024082625.

[0013] Despite these developments, there remains a need for modular training systems that can effectively convert existing bicycle trainers into high-quality rowing machines or multi -function trainers, utilizing the resistance unit of the bicycle trainer without compromising functionality, while providing secure attachment mechanisms, intuitive user interfaces, and efficient power transmission between the user and the resistance unit.

[0014] Acknowledgement of the above references herein is not to be inferred as meaning that these are in any way relevant to the patentability of the presently disclosed subject matter. GENERAL DESCRIPTION

[0015] The present disclosure provides ways to convert a bicycle trainer into a rowing machine or other exercise equipment. The system uses the resistance unit of a bicycle trainer, saving space and cost compared to having separate machines. A key feature of disclosed embodiments is a special attachment mechanism that securely connects the rowing apparatus to the bicycle trainer's resistance unit while allowing quick and easy conversion between different exercise modes. An innovative connection system is disclosed, wherein two connecting arms are used to attach to the resistance unit's power axle and wheel. Engagement pins are used in some embodiments to interlock gear wheels of the resistance unit, for creating a stable and reliable mechanical link. When connected to the resistance unit, as the user pulls the puller handle, the applied motion turns a pull wheel of the system, which transfers power through a chain or belt to the resistance unit, creating the appropriate resistance e.g., for rowing exercise.

[0016] A spring mechanism is used in embodiments to automatically rewind the pull cord after each stroke. An adjustable seat is provided, that slides along a rail just like a traditional rowing machine. The disclosed embodiments enable to easily transform a bicycle trainer into completely different exercise equipment without compromising the quality of the workout experience. The attachment system is designed to be secure yet simple to disconnect when switching back to bicycle training.

[0017] A first aspect of the disclosure is directed to a multi training system comprising:

[0018] A bicycle trainer comprising resistance power unit support frame, a resistance unit having a power axle with an external gear cassette articulated to said axle, and a mount system for articulating with a rear end of a bicycle chain stay;

[0019] A secondary exercising system comprising a second support frame attachable to the power unit support frame and comprising a pull wheel mounted on a pull wheel axle and having an axis extending parallel with an axis of the power axle, a gear wheel system mounted on the pull wheel axle via a rotary ratchet mechanism and / or a one-way bearing for selective engaging rotation of the pull wheel with the gear wheel system when the pull wheel is rotated at a first sense, and disengaging rotation therebetween when the pull wheel rotates at an opposite, second sense; a transmission drive for power transmission between the gear cassette and the gear wheel system; and a pull cord secured at one end to the pull wheel and a cord grip at an opposite, free end of the pull cord, wherein said pull cord is windable over the pull wheel; and a user interface training system. The bicycle trainer is a so-called direct drive trainer, namely wherein a rear end of the bicycle chain stay (at times referred to as a 'dropout') is secured to the power resistance unit, wherein a rear wheel of the bicycle is removed therefrom.

[0020] A second aspect of the disclosure is directed to a kit for converting a bicycle trainer to at least a row training machine, the kit comprising:

[0021] A secondary exercising system comprising a second support frame attachable to a power unit support frame of a bicycle trainer, and comprising a pull wheel mounted on a pull wheel axle and having an axis extending parallel with an axis of the power axle, a gear wheel system mounted on the pull wheel axle via a rotary ratchet mechanism and / or a one-way bearing for selective engaging rotation of the pull wheel with the gear wheel system when the pull wheel is rotated at a first sense, and disengaging rotation therebetween when the pull wheel rotates at an opposite, second sense; a transmission drive for power transmission between the gear cassette and the gear wheel system; and a pull cord secured at one end to the pull wheel and a cord grip at an opposite / free end of the pull cord, wherein said pull cord is windable over the pull wheel; and a user interface training system.

[0022] According to a first configuration of the disclosure, the secondary exercising system is a rowing trainer, wherein the user interface system is a linear seat rail, supporting a seat unit, and wherein a front portion of said seat rail is attached to the second support frame, and wherein pulling the free end of the pull cord towards a rear end of the seat rail, entails rotating the pull wheel in said first sense.

[0023] According to a second configuration of the disclosure, the secondary exercising system is a multi -function cable-pull tower trainer, wherein the user interface system comprises a tower-like frame is attached to the second support frame, and comprising at least one free pulley articulated to said tower frame, wherein the pull cord extends about said pulley; and wherein pulling the free end of the pull cord away from said free pulley, entails rotating the pull wheel in said first sense.

[0024] The multi -function cable-pull tower trainer can be used, for example, for exercises such as lat pulldowns, cable crunch, face pull, pallof press, pressdowns, overhead extensions, etc.

[0025] The secondary exercising system can be used as a multi -function cable-pull fitness trainer, wherein pulling the free end of the pull cord away from said free pulley, entails rotating the pull wheel in said first sense. The multi -function cable-pull fitness trainer can be used, for example, for exercises such as cable lateral / raise, cable kickback, stationary cable row (cable pull), cable curl, overhead triceps extension, etc.

[0026] The secondary exercising system can comprise a rowing trainer and a multifunction fitness trainer, however wherein the pull cord can be alternatively used for one of said rowing trainer and said multi -function fitness trainer.

[0027] A third aspect of the disclosure is directed to a multi training system comprising: a support frame couplable to a resistance unit having a power axle; a pull wheel mounted via a pull wheel axle to said support frame, said pull wheel axle having an axis extending parallel with an axis of the power axle; a secondary wheel mounted on the pull wheel axle for transferring rotation of the pull wheel to a power wheel of the resistance unit; a transmission drive for power transmission between the secondary wheel and the power wheel; a pull cord secured at one end to the pull wheel and a cord puller at an opposite / free end of the pull cord, wherein said pull cord is windable over the pull wheel; and an elastic element elastically coupling between the pull wheel axle or the support frame and the pull wheel to restore an angular position thereof after each pulling and spool the pull cord back onto the pull wheel.

[0028] A fourth aspect of the disclosure is directed to an exercising system connectable to a resistance unit, the exercising system comprising: a trainer structure comprising an elongated seat rail, a seat and foot supports configured for slidable movement and securing to the seat rail, a pull wheel unit including a pull wheel housed therein, a pull cord secured at one end to the pull wheel and a cord puller connected to an opposite / free end of the pull cord, and two connection arms; and an attachment mechanism provided at end portions of the two connection arms and configured to mechanically couple one of the two connection arms to a power wheel of the resistance unit and the other connection arm to a power axle of the power wheel.

[0029] In some embodiments a wireless sensor module is used to measure and transmit data / signals indicative of force and / or stroke rates applied to the pull cord. An external monitoring device (e.g., smartphone) can be configured with an exercise monitoring application for receiving and processing and / or displaying the force and / or stroke rates based on the measurement data from the wireless sensor module.

[0030] In yet another aspect there is provided a method of converting a bicycle trainer to a rowing training machine. The method comprises maneuvering a trainer structure to located a resistance unit between connection arms of the trainer structure, and attaching the trainer structure to the resistance unit by an attachment mechanism provided at end portions of the connection arms by mechanically coupling one of the connection arms to a power wheel of the resistance unit and the other connection arm to a power axle of the power wheel. The maneuvering of the trainer structure may comprise at least one of downward movement, lateral movement, or a combination of such movements, of the end portions of the connection arms.

[0031] Attaching the trainer structure to the resistance unit comprises in some embodiments the following steps: moving an axle docking member in one connection arm outwardly to clear a passage for placing the power axle between the connection arms; placing a power axle of the resistance unit between the connection arms; engaging pins of a wheel engagement assembly in the other connection arm with indentations of at least one gearwheel of the power wheel; moving the axle docking member inwardly to engage end portion of the power axle; and inserting a fastener pin through the axle docking member, the power axle, and the wheel engagement assembly to secure the connection.

[0032] Attaching the trainer structure to the resistance unit can comprise engaging two pins of a wheel engagement assembly provided in the other connection arm with two indentations of at least one gearwheel of the power wheel by a downward movement of the connection arms. Alternatively, attaching the trainer structure to the resistance unit may comprise pressing one or more pins of a wheel engagement assembly provided in the other connection arm against an elastic element for placing then in indentations of at least one gearwheel of the power wheel.

[0033] The method may comprise acquiring measurement data indicative of force and / or stroke rates applied to the pull cord and e.g., wirelessly, or over wires) transmitting the same to an external device (e.g., a smart device running an exercise monitoring application).

[0034] Any one or more of the following features, designs and configurations can be associated with any one or more of the aspects of the present disclosure, individually or in various combinations thereof:

[0035] • The secondary exercising frame can be detachably attachable to the support frame;

[0036] • The pull cord can be pulled along a tangent extending from the pull wheel at any direction extending between vertical and horizontal directions; • The linear seat rail can be detachably attachable to the second support frame;

[0037] • The linear seat rail can be integral with the second support frame;

[0038] • The linear seat rail can extend horizontally, or it can be selectively inclined;

[0039] • The pull wheel can be spring biassed to rotate in said second sense, whereby the pull cord is collected and re-winded over the pull wheel, upon cease of pull force applied to the pull cable;

[0040] • The pull wheel can be spring biassed by a spiral spring anchored at one end to the pull wheel axle (or directly to the secondary frame) and at another end to pull wheel;

[0041] • The ratchet mechanism can be any such mechanism facilitating rotary engagement of the gear wheel system with the pull wheel when the pull wheel is rotated at a first sense, whilst disengaging from one another when the pull wheel rotates at the second sense, such that the gear wheel system does not rotate with the pull wheel. Such a ratchet mechanism can be one of various ratchet gear and pawl / claw mechanisms, free hub ratchet mechanisms, star ratchet mechanisms, etc.;

[0042] • The arrangement is such that when the pull wheel rotates at the second sense (z.e., collecting the pull cord), the gear wheel system is idle, to prevent the power transmission by the transmission drive when the pull wheel rotates in the second sense;

[0043] • The transmission drive can be a chain drive, a belt / timing drive or a shaft drive, for delivering rotational motion between the parallelly disposed gear cassette of the bicycle trainer and the gear wheel system of the secondary exercising system;

[0044] • A gear shifter can be associated with one or both of the gear cassette and the gear wheel system, for selecting a gear ratio;

[0045] • The gear shifter can be cable operated or be a wireless system;

[0046] • A gear changing interface / lever can be operated at the cord grip at the free end of the pull cord;

[0047] • The gear shifter can be articulated to the second support frame at a front portion thereof; • A front portion of the second support frame is attachable to the power unit support frame of the bicycle trainer;

[0048] • The front portion of the second support frame can comprise a bicycle dropout mimicking portion, attachable to a mount system of the bicycle trainer;

[0049] • A shifter (derailleur) of the secondary exercising system can be attachable to an arm of the second support frame;

[0050] • A face of the pull wheel can be configured with a pull cord collecting groove or recess;

[0051] • The attachment mechanism can comprise in one connection arm a rotatable wheel engagement assembly configured to removably engage the power wheel of the resistance unit, and an axle docking member in the other connection arm configured to removably receive and hold an end portion of the power axle of the resistance unit;

[0052] • The wheel engagement assembly can comprise an engagement ring structure having one or more of engagement pins configured to engage with indentations of at least one gear of the gear cassette mounted on the power wheel;

[0053] • The engagement pins can be fixedly attached to the engagement ring structure or can be movable (e.g., within cavities and / or pass-through bores formed in the engagement ring structure) against one or more elastic elements;

[0054] • The attachment mechanism can enable coupling the connection arms to the resistance unit by downward movement, lateral movement, or a combination of such movements;

[0055] • The axle docking member can be slidably received in a supporting socket of the respective connection arm for lateral movement to facilitate placement of the power axle between the connection arms;

[0056] • The cord grip can be any sort of grip configurable for gripping / attaching to a body part of an individual, such as a rigid elongate bar, a rigid two / single- handle grip, a strap, a rope, a chain, etc. The cord grip can be readily changeable and can be articulated to the free end of pull cord e.g., by a clip / carabiner fastener, etc.;

[0057] • A pair of foot plates (footrests) can be attached to one of the second support frame and the linear seat rail of a rowing trainer; • The foot plates can be fixed, floating or adjustable (axially, along the seat rail, and angularly with respect thereto);

[0058] • The seat can be fixable at intervals over the seat rail, or it can be slidably articulated thereto;

[0059] • The seat can be rotated over the seat rail and fixed at different orientations, e.g., facing front (namely towards the pull wheel axle), facing backwards, or sidewards;

[0060] • The power axle of the bicycle trainer and the pull wheel axle of the secondary exercising system can extend parallel with one another;

[0061] • The power axle of the bicycle trainer can comprise a quick release pin system for fast engaging / di sengaging a bicycle chain stay;

[0062] • The mount system comprises a hollow power axle configurable for attaching thereto a rear end of a bicycle chain stay by a rear wheel pin;

[0063] • The external gear cassette of the bicycle trainer can comprise one or more coaxially disposed gears;

[0064] • The gear wheel system of the secondary exercising system can comprise one or more coaxially disposed gears (z.e., a gear cassette);

[0065] • The second frame can be attached to the power unit support frame at the power axle;

[0066] • The secondary exercising system can be connectable to the mount system of the bicycle trainer by two parallelly extending, bifurcate connection arms at a front portion of the second support frame, with connection eyes disposed at an end portion of each arm, for detachable connecting by applying a fastener pin through hollow power axle;

[0067] • A tensioning mechanism can be provided for imparting tension to the transmission drive also when no force is applied thereto;

[0068] • The trainer structure can have a holder member attached to the seat rail and configured to receive and hold the cord puller to allow temporarily attaching the cord puller in its pulled state to the seat rail;

[0069] • The pull wheel unit can be fixedly attached to an end portion of the seat rail by one or more attachment arms;

[0070] • The housing of the pull wheel unit can comprise a gripping handle configured to facilitate maneuvering the trainer structure; • The housing of the pull wheel unit can comprise a holder cavity configured for receiving and holding a display device therein.

[0071] BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to better understand the subject matter that is disclosed herein and to exemplify how it may be carried out in practice, embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which:

[0073] Fig. 1A illustrates a prior art direct drive bicycle trainer configurable as part of multi training system according to the present disclosure, with a bicycle attached thereto, at a bicycle training configuration;

[0074] Fig. IB illustrates a bicycle chain stay detached from direct drive bicycle trainer useful as a multi training system according to the present disclosure;

[0075] Fig- 2 is a secondary exercising system according to an embodiment of the present disclosure, being a row training system;

[0076] Fig- 3 illustrates the multi training system according to the disclosure, at a rowtraining configuration;

[0077] Fig- 4 is an exploded view of a pull wheel hub assembly of the secondary exercising system;

[0078] Fig. 5 is an enlargement of the portion marked V in Fig. 3;

[0079] Fig. 6 illustrates the multi training system according to the disclosure, at a combined multi -function cable-pull tower trainer and row trainer;

[0080] Fig. 7A to 7G shows an exercising system according to possible embodiments, wherein Fig. 7A shows the exercising system before connection of its trainer structure to a resistance unit, Fig. 7B shows the exercising system after the trainer structure is attached to the resistance unit, with the puller attached to a holder member of the seat rail, Fig. 7C depicts the exercising system with portions of the housing and arm removed to show internal mechanisms, Fig. 7D is a sectional view of the pull wheel unit, Fig. 7E shows a section view of the resistance unit when attached to the trainer structure, Fig. 7F shows the connecting arms with the fastener pin connecting therebetween, Fig. 7G shows a sectional view of the resistance unit located between the connecting arms, before it is connected thereto; and Figs. 8A to 8C schematically illustrate embodiments of the engagement ring structure according to possible embodiments, wherein Fig. 8A shows a configuration utilizing two engagement pins, and Figs. 8B and 8C shows configurations of the engagement ring structure having one or more movable engagement pins.

[0081] DETAILED DESCRIPTION OF EMBODIMENTS

[0082] Attention is first directed to Figs. 1A and IB of the drawings, illustrating a state- of-the-art bicycle trainer 10 being a so-called direct drive trainer, namely wherein a rear end of the bicycle chain stay 12 (at times referred to as a 'dropout') is secured to the bicycle trainer 10), typically by a quick release fastener pin 13, wherein a rear wheel of the bicycle 16 is removed therefrom. The bicycle trainer 10 comprises a support frame 15 with support legs 17, and an electric resistance unit (not seen), though it is appreciated that other forms of resistance are known, typically- mechanical or air resistance. A mount system is provided for articulating the bicycle 16 to the bicycle trainer 10, namely by way of a hollow power axle 18 through which the fastener pin 13 extends.

[0083] An external gear cassette 20 is articulated with power axel 18, such that when a bicycle 16 is mounted on trainer 10, a drive chain 22 of the bicycle 16 is engaged with said gear cassette 20 and wherein gear shifter 26 (secured to the bicycle frame) governs gear shift of the chain 22 between the cassette gears.

[0084] Further attention is now directed to Fig. 2 of the drawings, illustrating a secondary exercising system generally designated 30, configured as a rowing trainer.

[0085] The secondary exercising system 30 comprises a second support frame 32 having two parallelly extending, bifurcate connection arms 34 at a front portion thereof, with connection eyes 36 disposed at an end portion of each arm 34, for detachable connecting to the mount system of the bicycle trainer 10, namely by applying a fastener pin 13 through hollow power axle 18.

[0086] The second support frame 32 has an elongate shape with a user interface training system extending therefrom, namely a seat rail 40, supported over posts 42 for retaining the seat rail 42 substantially horizontal when secured to bicycle trainer 10 (Fig. 3). According to an embodiment of the disclosure, the length and or angle of posts 42 is adjustable (telescopically by extensions 46 and angularly by pivot locks 48), to thereby change the angle of the seat rail 40, for levelling the seat rail and optionally changing rowing intensity. Secondary exercising system 30 further comprises a pull wheel 50 mounted on a pull wheel axle 52 and having an axis X2 extending parallel with an axis XI of the power axle (and with a connectivity axis X3 extending between connection eyes 36; Fig.2). A gear wheel system 56 is mounted on the pull wheel axle 52 via a rotary ratchet mechanism 58 (Fig. 4) Gear wheel system 56 can be a single gear plate or it can be a gear cassette, optionally configurable with a gear shifter (not shown).

[0087] Ratchet mechanism 58 (and / or a one-way bearing) is mounted on axle 52 and is provided for selective engaging rotation of the pull wheel 50 with the gear wheel system 56 when the pull wheel is rotated at a first sense SI (clockwise direction in the illustrated example), and disengaging rotation therebetween when the pull wheel 50 rotates at an opposite, second sense S2. The ratchet mechanism can be any such mechanism facilitating rotary engagement of the gear wheel system with the pull wheel when the pull wheel is rotated at a first sense, whilst disengaging from one another when the pull wheel rotates at the second sense, such that the gear wheel system does not rotate with the pull wheel. Such a ratchet mechanism can be a type of free hub ratchet mechanism, such as a star ratchet, or a pawl / claw ratchet mechanisms. In the illustrated example, ratchet mechanism 58 is a star-type ratchet mechanism, comprising a pair of facing star ratchet rings 60; 62, wherein the ratchet rings 60; 62 are cogged at their facing faces 61; 63 at an opposite direction for rotary engagement with one another, and radially cogged at 65; 67 for inter-engagement within a first ratchet housing 68 secured at an inside face of gear wheel 56, and a second housing 70 secured to pull wheel 50, wherein both said housing members 68 and 70 are configured with inside radial engaging teeth engageable with radially cogged faces at 65; 67. It is further seen that the ratchet rings 60; 62 are biased towards one another into rotary engagement by a pair of oppositely disposed conical biasing springs 72 and 74, bearing against respective housing members 68 and 70.

[0088] A spiral spring 80 has a first leg 86 fixed to axle 52 (or to the secondary frame directly) and leg 88 secured to an arresting plate 90 which in turn is fixed coaxially to pull wheel 50, hence biasing the pull wheel 50 in the counterclockwise direction S2.

[0089] A transmission drive is provided for power transmission between the gear cassette 20 and the gear wheel system 56. In the present example the transmission drive is a drive chain (also referred to herein as looped transmission member or transmission drive) 96, though according to other embodiments it can be a drive belt or a shaft drive (not shown). A pull cord 100 secured at one end to the pull wheel 50 and comprises a cord grip (also referred to herein as puller) 104 at an opposite, free end of the pull cord, wherein said pull cord 100 is windable over the pull wheel 50. For that purpose, a face of the pull wheel is configured with a pull cord collecting groove 57.

[0090] In the illustrated example cord grip 104 is a pull bar, though it is appreciated that it can be any sort of grip configurable for gripping / attaching to a body part of an individual, such as a rigid elongate bar, a rigid two / single-handle grip, a strap, a rope, a chain, etc., (see for example Fig. 6). The cord grip can be readily changeable and can articulated to the free end of pull cord 100, e.g., by a clip / carabiner fastener, etc.

[0091] Rowing trainer 30 further comprises a seat unit 110 slidingly received over seat rail 40 with suitable friction reducing arrangement (e.g., bearings - not seen), and a pair of foot supports 114 at a front portion of seat rail 40, wherein said foot plates (foot supports) can be fixed to the seat rail 40 or they can be floating or adjustable (axially, along the seat rail, and angularly with respect thereto). It is appreciated that the seat 110 can be rotated over the seat rail and fixed at different orientations, e.g., facing front (namely towards the pull wheel axle), facing backwards, or sidewards. Furthermore, seat 110 can be fixed to the rail and optionally set at different locations there along (spaced from the front portion).

[0092] A gear shifter (derailleur) 120 is secured at a front portion of the bifurcate connection arms 34 of to the second support frame 32, and is controllable wirelessly or via shift cable 126, by a trigger shifter 128 mounted on cord grip bar 104. Operating the gear shifter 120 derails (shifts) the chain 96 between the gears of the gear cassette 20 (similarly as in a bicycle riding procedure). Gear shifter 120 is used for shifting gear ratio between the power generator (user) and the resistance power unit, e.g., as known for example for a bicycle or bicycle trainer, for increasing / decreasing power load.

[0093] However, it is appreciated that the gear shifter can be omitted, whereby power is solely governed through the resistance power unit, and whereby resistance is controllable by the user (or pre-programed).

[0094] Gear shifter 120 comprises a spring biased arrangement, such that it serves also for tensioning the transmission drive, namely chain 96. Where a gear shifter is omitted, a chain (transmission drive) tensioning member is applied, to maintain the chain tensioned also when no force is applied thereto by a user. In use, as an individual ('user'; not shown) sits over the rowing trainer 30, the individual places his feet over the foot supports 114 and grasps the cord grip (bar) 104 and performs a row mimicking outfit. As the pull cord 100 is pulled backwards (in direction of arrow P), it entails rotation of pull wheel 50 in the first sense SI. At this state the ratchet mechanism 58 is engaged, resulting in corresponding rotation of gear wheel system 56 in direction SI, entailing corresponding rotation of chain 96. As a result, gear cassette 20 rotates while engaged with the resistance unit, applying rotary resistance according to a training program. The user can control resistance of the bicycle trainer 10 and training intensity by the gear shifting arrangement as discussed herein above.

[0095] Now, when the user has completed a pull stroke in direction of arrow P, the user nears towards the second support frame 32 (in a direction opposite to P) allowing the pull cord 100 to wind over the pull wheel 50 as it rotates in a counterclockwise direction S2, under influence of the spiral spring 80. At this instance, the ratchet mechanism (or oneway bearing) 58 is disengaged, whereby rotation of pull wheel 50 does not entail rotary motion of gear wheel system 56, hence chain 96 remains still and does not reciprocate.

[0096] With further attention directed to Fig. 6 there is illustrated another configuration of the disclosure, wherein the secondary exercising system is a multi -function cable-pull tower trainer 130, wherein the user interface system comprises a tower-like frame 132 attached to the second support frame 32, and comprising at least one free pulley 136 articulated to said tower frame 132, wherein a pull cord 100' extends about said pulley 136 and is secured to pull wheel 50, with a second cord 138 attached to the tower and winded over pulley 136 such that pulling cord 138 causes pulley 136 to lift and extend cord 100’. This way, pulling the free end of the pull cord 138 away from said free pulley 136, entails rotating the pull wheel 50 in said first sense SI whereby operation is similar to a training sequence as discussed herein above.

[0097] In the illustrated example of Fig. 6 the secondary exercising system comprises also a row training system 140, similar with the arrangement described above.

[0098] Further attention is now directed to Fig. 7A of the drawings, which shows an exercising system 30' according to possible embodiments, generally comprising a trainer structure 11 connectable to a resistance unit (e.g., bicycle trainer) 10. The trainer structure 11 comprises an elongated seat rail 40, a seat 110 and foot supports 114, each configured for slidable movement and securing to the seat rail 40, a pull wheel unit 14, a cord grip / puller 104 connected to a pull cord (100 in Fig. 7B) spooled inside the pull wheel unit 14, and two connection arms 34a and 34b. The resistance unit 10 comprises a housing lOh, a power axle 18 mounted to the housing, and a power wheel lOw configured to revolve over the power axle 18.

[0099] The trainer structure 11 can have a holder member 40e, fixedly and / or slidably attached to the seat rail 40 and configured to receive and hold the cord puller 104 to allow temporarily attaching the cord puller 104 in a pulled state, or partially pulled state, to the seat rail 40. The connection arms 34a and 34b are configured to receive the power axle 18 between their distal end portions and detachably connect the trainer structure 11 to the resistance unit 10 by a fastener pin 13 configured to removably pass through passages provided in the connection arms 34a, 34b and the power axle 18.

[0100] In some embodiments, end portions of the connection arms 34a, 34b comprise an attachment mechanism 34j configured for mechanically coupling one arm (e.g., 34a) to the power wheel lOw of the resistance unit 10, and for mechanically coupling the other arm (e.g., 34b) to the power axle 18 of the resistance unit 10. Optionally, but in some embodiments preferably, the attachment mechanism 34j comprises in one connection arm (34a) a rotatable wheel engagement assembly 34f configured to removably engage the power wheel lOw of the resistance unit 10, and an axle docking member 34k in the other connection arm (34b) configured to removably receive and hold an end portion of the power axle 18 of the resistance unit 10.

[0101] In some embodiments, the pull wheel unit 14 is fixedly attached to an end portion of the seat rail 40 by one or more attachment arms extending downwardly from its housing 14h and configured to securely attach to the seat rail 40. In this non-limiting example, the pull wheel unit 14 is attached to the seat rail 40 by two attachment arms: a front attachment arm 14q connected to an extremity of the seat rail 40; and a rear attachment arm 14r connected to the seat rail 40 posterior to front attachment arm 14q.

[0102] Optionally, the housing 14h of the pull wheel unit 14 comprises a gripping handle 14d configured to facilitate gripping and maneuvering trainer structure 11, to alleviate placing the power axle 18 of the resistance unit 10 between the connection arms 34a, 34b and passing the fastener pin 13 therethrough for connecting to the trainer structure 11. As better seen in Fig. 7B, the housing 14h may further comprise a holder cavity 14e configured for receiving and holding a display / smart device (not shown) therein.

[0103] Fig. 7B shows the exercising system 30' after the trainer structure 11 is attached to the resistance unit 10, and further exemplifies attachment of the puller 104 to the holder member 40e of the seat rail 40 while a portion of the pull cord 100 drawn via a rear opening 14n of the pull wheel unit 14 is maintained tensioned therebetween. Fig. 7C depicts the exercising system 30' when the trainer structure 11 is attached to the resistance unit 10, the pull cord 100 is spooled in pull cord collecting groove 57, and portions of the housing 14h and arm 34b are removed. As seen, the pull wheel 50 is rotatably mounted inside the pull wheel unit 14, and it is mechanically coupled to an auxiliary wheel 34w of the arm 34b by a looped transmission member 96 for transferring rotary motion thereto.

[0104] Optionally, but in some embodiments preferably, a secondary wheel 50s coupled to the wheel axle 52 of the pull wheel 50 is mechanically coupled to the auxiliary wheel 34w of the connecting arm 34a by the looped transmission member 96 (e.g., chain or belt / timing drive). In this specific and non-limiting example, the secondary wheel 50s and the auxiliary wheel 34w are implemented by (e.g., toothed) pulleys having a connecting chain or (e.g., toothed) belt 96 for transferring rotary motion therebetween.

[0105] In some embodiments a wireless sensor (e.g., having one or more strain gauges) device 104s e.g., electrically coupled to a wireless communication module - such Bluetooth (not shown), and having a small power source (e.g., battery - not shown), is placed inside the puller 104 and / or mechanically coupled to the pull cord 100, for measuring tension of the pull cord 100. For example, one gauge strain / sensor can be attached to the puller 104 and the another to the pull cord 100. The wireless sensor device 104s can be configured to generate measurement data indicative of the force applied by the user responsive to the pulling of the puller 104 and transmit it to a monitoring device (a smart device running an exercise monitoring application - not shown) in order to provide accurate force measurements and / or stroke rates.

[0106] As also exemplified in Fig. 7C, the rotatable wheel engagement assembly (341) of the connection arm 34a is engageable in possible embodiments with a gear cassette 20 of the power wheel lOw.

[0107] Fig. 7D is a sectional view of the pull wheel unit 14, showing the pull wheel 50 according to possible embodiments comprising hub portions 50a and 50b extending in opposing lateral directions. One hub portion (e.g., 50a) is attached (e.g., by screws) to the secondary wheel 50s mechanically coupled by bearing 8a for rotary motion over axle bracket 5a attached to a side of the housing 14h. The bearing 8a is mounted in a bearing housing element 6a formed in the secondary wheel 50s. The other hub portion (e.g., 50b) is coupled by bearing 8b contained thereinside for rotary motion over axle bracket 5b attached to an opposite side of the housing 14h.

[0108] In this non-limiting example, the axle bracket 5b comprises a support member 5c axially extending inwardly therefrom to support an elastic element 80 configured to restore the angular position of the pull wheel 50 after each pull exercise applied by the puller 104, and spool the pull cord 100 back in the pull cord collecting groove 57 of the pull wheel 50. For example, the elastic element 80 can be a spiral spring attached by one end thereof to the inner wall of the hub 50b and by another end thereof to the axle bracket 5b and / or its support member 5c.

[0109] In possible embodiments, a ratchet assembly (not shown) is provided in / on the hub portion 50a. Alternatively, a one-way bearing (not shown) is provided between the hub portion 50a and the secondary wheel 50s instead of the ratchet assembly. Optionally, but is some embodiments preferably, the pull wheel unit 14 is not equipped with one-way bearing(s) or ratchet assembly, but relies on such mechanism (not shown) typically provided between the power axle (18) and the power wheel (lOw) of the resistance unit (10). After each pull action applied by the puller (104), the elastic element 80 will rotate the pull wheel 50 in the counter rotations direction, thereby counter rotating the auxiliary wheel 34w by the looped transmission member 96, while the power wheel maintains its original rotary movement direction.

[0110] Fig. 7E shows a section view of the resistance unit 10 when attached to the trainer structure 11, without the housing (lOh) of the resistance unit 10, without the connecting arms (34a, 34b), and without the side cover of the housing 14h of the pull wheel unit 14, but with the auxiliary wheel 34w of the connecting arm (34b). In this non-limiting embodiment, the resistance unit 10 is seen mechanically coupled to the pull wheel unit 14 of the trainer structure 11 by a toothed belt 96 coupling between the secondary wheel 50s of the pull wheel (50) and the auxiliary wheel 34w of the wheel engagement assembly 34f provided in the respective connecting arm (34a). In this state, the axle docking member 34k is attached to one side of the power axle 18, and the wheel engagement assembly 34f is attached to one or more gearwheels 20g of the gear cassette 20 of the power wheel lOw.

[0111] In possible embodiments, the auxiliary wheel 34w of the wheel engagement assembly 34f is coupled for rotary motion over axle bracket 9a via a bearing 34r. The axle bracket 9a can be fixedly attached by one side thereof to the respective connecting arm (34a), and its other side can be detachably attached to / over the power axle 18 of the resistance unit 10. The bearing 34r can be mounted inside the auxiliary wheel 34w. Optionally, but in some embodiments preferably, the auxiliary wheel 34w comprises an inwardly projecting engagement ring structure 34u configured for coupling the wheel engagement assembly 34f to one or more of the gearwheels 20g of the gear cassette 20 of the power wheel lOw.

[0112] Fig. 7F shows the connecting arms with the fastener pin 13 connecting therebetween, but without the resistance unit (10). As seen, a plurality of engagement pins 34p are distributed on an inner side surface of the engagement ring structure 34u of the auxiliary wheel (34w), configured to be engaged in indentations (not shown) of one or more of the gearwheels (20g) of the gear cassette (20) of the power wheel (lOw). The fastener pin 13 is seen in place ready for removal by rotating and / or pulling it via its pin handle 13s. A bottom opening 34t may be provided in the arm 34b for allowing engagement with different trainers having different form factors.

[0113] Fig. 7G shows a sectional view of the resistance unit 10 located between the connecting arms 34a, 34b, before it is connected thereto. In this non-limiting example, the axle docking member 34k is inserted in a supporting socket 34z of connecting arm 34b. A stopper ring 34y is connected in some embodiments (e.g., by screws) to the supporting socket 34k to prevent unintentionally separating the axle docking member 34k from the connecting arm 34b.

[0114] In order to connect the trainer structure 11 to the resistance unit 10, the axle docking member 34k is pulled in a sideway outward direction to clear a passage between the connecting arms 34a, 34b for allowing placement of the power axle 18 of the resistance unit 10 therebetween. When the resistance unit 10 is located between the connecting arms 34a, 34b the gearwheels 20g of the gear cassette 20 are facing the pins 34p provided on the engagement ring structure 34u. Next, exercising system 30’ is moved laterally toward cassette 20 placing the pins 34p of the engagement ring structure 34u in indentations 20i of the gearwheel(s) 20g of the gear cassette 20. Next the docking member 34k is moved towards the connecting arm 34b for inserting the extremity of the power axle 18 into inner-side cavity 34v of the axle docking member 34k. Optionally, but in some embodiments preferably, the pins 34p of the engagement ring structure 34u are configured to be received in respective indentations 20i of the outermost (z.e., the smallest) gearwheel 20g of the gear cassette 20. After placing the pins 34p of the engagement ring structure 34u in the respective indentations 20i of the gearwheel(s) 20g of the gear cassette 20 and pushing the axle docking member 34k back into the connecting arm 34b, the fastener pin (13) can be inserted through the passage 2g of the axle docking member 34k, all the way through the passage 18g of the power axle 18, and into the passage 9g of the axle bracket 9a, thereby securing the power axle 18 of the resistance unit 10 to the connecting arms 34a, 34b and mechanically coupling the power wheel of the resistance unit 10 to the pull wheel (50) for transferring rotary motion thereof to the power wheel via the looped transmission member 96.

[0115] Fig. 8A schematically illustrates a possible embodiment of the engagement ring structure 34u configured with only two engagement pins 34p, to thereby enable placing the pins 34p of the engagement ring structure 34u in corresponding indentations 20i of a gearwheel 20g of the gear cassette (20) by downward engagement movement of the connecting arms 34a, 34b (i.e. , instead of the lateral engagement movement demonstrated in Fig. 7G). This embodiment can be thus configured without requiring the axle docking member 34k to be pulled laterally outwardly to clear the passage between the connecting arms 34a, 34b

[0116] Fig. 8B schematically illustrates a possible embodiment of the engagement ring structure 34u having a one or more movable engagement pins 34p disposed in respective cavities 34c configured for lateral movement thereinside against respective elastic (e.g., spring) elements 34h. Alternatively, as exemplified in Fig. 8C, in a possible embodiment the pins 34p are slidable disposed in pass-through bores 34i and formed in the engagement ring structure 34u and fixedly attached to a movable ring / plate 34k that is mounted on the outer face of the engagement ring structure 34u. The movable pins 34p can protrude forwardly for engaging with a gearwheel (20g) of the cassette 20, or retracted backwardly to disengage them, by lateral movement of the ring / plate 34k against an elastic element (e.g., spring) 34h mounted inside axle bracket 9a.

[0117] These embodiment further improves the flexibility of the engagement movement of the connecting arms 34a, 34b with respect to the gearwheel 20g, which can allow for downward and backward-movement without reducing the number of engagement pins 34p due to the elastic sideway movements of the engagement pins 34p inside their respective cavities 34c. It is note that though Figs. 8B and 8C exemplifies embodiments wherein the engagement ring structure 34u comprises two movable pins 34p, it may be similarly implemented using a single, or more than two, movable pins 34p.

Claims

CLAIMS:

1. A multi training system comprising: a support frame couplable to a resistance unit having a power axle and a power wheel; a pull wheel mounted via a pull wheel axle to said support frame; a transmission drive for power transmission between the pull wheel and the power wheel; a pull cord secured at one end to the pull wheel and to a cord puller at an opposite free end of the pull cord; an elastic element elastically coupling between the pull wheel axle or the support frame and the pull wheel to restore an angular position thereof after each pulling and spool the pull cord back onto the pull wheel; and an attachment mechanism provided at end portions of two connection arms of the support frame and configured to mechanically couple one of said two connection arms to the power wheel of the resistance unit and the other arm to the power axle of the power wheel.

2. The system of claim 1 comprising a secondary wheel mounted to the pull wheel axle for transferring rotation of the pull wheel to the power wheel of the resistance unit, and wherein the transmission drive is configured for power transmission between the said secondary wheel and the power wheel.

3. The system of claim 1 or 2 wherein the attachment mechanism is configured to enable coupling the connection arms to the resistance unit by at least one of: downward movement, lateral movement, or a combination of such movements.

4. The system of any one of the preceding claims wherein the attachment mechanism comprises in one connection arm a rotatable wheel engagement assembly configured to removably engage the power wheel of the resistance unit, and an axle docking member in the other connection arm configured to removably receive and hold an end portion of the power axle of the resistance unit.

5. The system of claim 4 wherein the axle docking member is slidably received in the respective connection arm and configured for lateral movement to facilitate placement of the power axle between the connection arms.

6. The system of any one of the preceding claims wherein the wheel engagement assembly comprises an engagement ring structure having a plurality of engagement pins configured to engage with indentations of at least one gearwheel of the power wheel.

7. The system of claim 6 wherein the engagement pins are fixedly attached to the engagement ring structure.

8. The system of claim 6 or 7 wherein the engagement pins are elastically movable within cavities or pass-through bores formed in the engagement ring structure.

9. The system of any one of the preceding claims configured as a rowing trainer, wherein pulling the free end of the pull cord towards a rear end of a seat rail of the support frame entails rotating the pull wheel.

10. The system of any one of the preceding claims configured as a multi -function cable-pull tower trainer comprising a tower-like frame attached to the support frame, and at least one pulley articulated to said tower frame, wherein the pull cord extends about said pulley, and wherein pulling the free end of the pull cord away from said pulley entails rotating the pull wheel.

11. The system of claim 2 wherein the pull wheel comprises a hub portion extending in a lateral direction for attachment to the secondary wheel.

12. The system of claim 11 comprising a bearing housing formed in the secondary wheel for coupling by a bearing for rotary motion over an axle bracket attached to a side of a housing.

13. The system of claim 11 or 12 wherein the pull wheel comprises a further hub portion extending in an opposite lateral direction and being coupled by a bearing for rotary motion over an axle bracket attached to an opposite side of the housing.

14. The system of any one of claims 11 to 13 comprising a one-way bearing coupling between the hub portion and the secondary wheel.

15. The system of any one of the preceding claims comprising a ratchet mechanism coupled to the pull wheel.

16. The system of any one of the preceding claims wherein the transmission drive is one of a chain drive, a belt drive or a shaft drive.

17. The system of any one of the preceding claims wherein a face of the pull wheel is configured with a pull cord collecting groove or recess.

18. The system of any one of the preceding claims comprising a pair of foot plates and a seat unit attached to a seat rail.

19. The system of any one of the preceding claims comprising a wireless sensor module configured to measure and transmit data / signals indicative of force and / or stroke rates applied to the pull cord.

20. An exercising system connectable to a resistance unit, the exercising system comprising: a trainer structure comprising an elongated seat rail, a seat and foot supports configured for slidable movement and securing to the seat rail, a pull wheel unit including a pull wheel housed therein, a pull cord secured at one end to the pull wheel and a cordpuller connected to an opposite end of the pull cord, and two connection arms; and an attachment mechanism provided at end portions of the connection arms and configured to mechanically couple one arm to a power wheel of the resistance unit and the other arm to a power axle of the power wheel.

21. The system of claim 20 wherein the attachment mechanism comprises in one connection arm a rotatable wheel engagement assembly configured to removably engage the power wheel of the resistance unit, and an axle docking member in the other connection arm configured to removably receive and hold an end portion of the power axle of the resistance unit.

22. The system of claim 20 wherein the wheel engagement assembly comprises an engagement ring structure having a plurality of engagement pins configured to engage with indentations of the power wheel.

23. The system of any one of claims 20 to 22 wherein the trainer structure has a holder member attached to the seat rail and configured to receive and hold the cord puller to allow temporarily attaching the cord puller in a pulled or partially state to the seat rail.

24. The system of any one of claims 20 to 23 wherein the pull wheel unit comprises an elastic element configured to restore the angular position of the pull wheel after each pull exercise applied by the puller, and spool the pull cord back in a pull cord collecting groove of the pull wheel.

25. The system of any one of claims 20 to 24 wherein the pull wheel unit is fixedly attached to an end portion of the seat rail by one or more attachment arms.

26. The system of any one of claims 20 to 25 wherein the pull wheel unit includes a housing comprising a gripping handle configured to facilitate maneuvering the trainer structure.

27. The system of any one of claims 20 to 26 wherein the pull wheel unit includes a housing comprising a holder cavity configured for receiving and holding a display device therein.

28. The system of any one of claims 20 to 27 a wireless sensor module configured to measure and transmit data / signals indicative of force and / or stroke rates applied to the pull cord.

29. A method of converting a bicycle trainer to a rowing training machine, the method comprising maneuvering a trainer structure to located a resistance unit between connection arms of said trainer structure; and attaching said trainer structure to saidresistance unit by an attachment mechanism provided at end portions of said connection arms by mechanically coupling one of said connection arms to a power wheel of said resistance unit and the other connection arm to a power axle of said power wheel.

30. The method of claim 29 wherein the maneuvering of the trainer structure comprises at least one of downward movement, lateral movement, or a combination of such movements, of the end portions of the connection arms.

31. The method of claim 29 or 30 wherein attaching the trainer structure to the resistance unit comprises: moving an axle docking member in one connection arm outwardly to clear a passage for placing the power axle between the connection arms; placing a power axle of the resistance unit between the connection arms; engaging pins of a wheel engagement assembly in the other connection arm with indentations of at least one gearwheel of said power wheel; moving the axle docking member inwardly to engage end portion of the power axle; and inserting a fastener pin through the axle docking member, the power axle, and the wheel engagement assembly to secure the connection.

32. The method of claim 29 or 30 wherein attaching the trainer structure to the resistance unit comprises engaging one or more pins of a wheel engagement assembly provided in the other connection arm with two indentations of at least one gearwheel of said power wheel by a downward movement of the connection arms.

33. The method of claim 29 or 30 wherein attaching the trainer structure to the resistance unit comprises pressing one or more movable pins of a wheel engagement assembly provided in the other connection arm against an elastic element for placing then in indentations of at least one gearwheel of said power wheel.

34. The method of any one of claims 29 to 33 comprising acquiring measurement data indicative of force and / or stroke rates applied to the pull cord and transmitting the same to an external device.

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